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authorIngo Molnar <mingo@elte.hu>2008-10-12 12:49:27 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-12 12:49:27 +0200
commit1389ac4b976abdc0555280dfc1aa2c3abcc19641 (patch)
tree1ec51aa0b1e33201f6f4f3bebc657f9ec65f8539 /net/ipv4/ipvs
parent69e13ad56f9e2cd81c4f8bfd6267211c10c14c08 (diff)
parentfd048088306656824958e7783ffcee27e241b361 (diff)
Merge branch 'linus' into x86/signal
Conflicts: arch/x86/kernel/signal_64.c
Diffstat (limited to 'net/ipv4/ipvs')
-rw-r--r--net/ipv4/ipvs/Kconfig224
-rw-r--r--net/ipv4/ipvs/Makefile34
-rw-r--r--net/ipv4/ipvs/ip_vs_app.c622
-rw-r--r--net/ipv4/ipvs/ip_vs_conn.c1023
-rw-r--r--net/ipv4/ipvs/ip_vs_core.c1125
-rw-r--r--net/ipv4/ipvs/ip_vs_ctl.c2373
-rw-r--r--net/ipv4/ipvs/ip_vs_dh.c258
-rw-r--r--net/ipv4/ipvs/ip_vs_est.c162
-rw-r--r--net/ipv4/ipvs/ip_vs_ftp.c393
-rw-r--r--net/ipv4/ipvs/ip_vs_lblc.c571
-rw-r--r--net/ipv4/ipvs/ip_vs_lblcr.c760
-rw-r--r--net/ipv4/ipvs/ip_vs_lc.c121
-rw-r--r--net/ipv4/ipvs/ip_vs_nq.c159
-rw-r--r--net/ipv4/ipvs/ip_vs_proto.c233
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_ah.c178
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_esp.c176
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_tcp.c614
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_udp.c428
-rw-r--r--net/ipv4/ipvs/ip_vs_rr.c116
-rw-r--r--net/ipv4/ipvs/ip_vs_sched.c251
-rw-r--r--net/ipv4/ipvs/ip_vs_sed.c161
-rw-r--r--net/ipv4/ipvs/ip_vs_sh.c255
-rw-r--r--net/ipv4/ipvs/ip_vs_sync.c930
-rw-r--r--net/ipv4/ipvs/ip_vs_wlc.c149
-rw-r--r--net/ipv4/ipvs/ip_vs_wrr.c234
-rw-r--r--net/ipv4/ipvs/ip_vs_xmit.c559
26 files changed, 0 insertions, 12109 deletions
diff --git a/net/ipv4/ipvs/Kconfig b/net/ipv4/ipvs/Kconfig
deleted file mode 100644
index 09d0c3f3566..00000000000
--- a/net/ipv4/ipvs/Kconfig
+++ /dev/null
@@ -1,224 +0,0 @@
-#
-# IP Virtual Server configuration
-#
-menuconfig IP_VS
- tristate "IP virtual server support (EXPERIMENTAL)"
- depends on NETFILTER
- ---help---
- IP Virtual Server support will let you build a high-performance
- virtual server based on cluster of two or more real servers. This
- option must be enabled for at least one of the clustered computers
- that will take care of intercepting incoming connections to a
- single IP address and scheduling them to real servers.
-
- Three request dispatching techniques are implemented, they are
- virtual server via NAT, virtual server via tunneling and virtual
- server via direct routing. The several scheduling algorithms can
- be used to choose which server the connection is directed to,
- thus load balancing can be achieved among the servers. For more
- information and its administration program, please visit the
- following URL: <http://www.linuxvirtualserver.org/>.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-if IP_VS
-
-config IP_VS_DEBUG
- bool "IP virtual server debugging"
- ---help---
- Say Y here if you want to get additional messages useful in
- debugging the IP virtual server code. You can change the debug
- level in /proc/sys/net/ipv4/vs/debug_level
-
-config IP_VS_TAB_BITS
- int "IPVS connection table size (the Nth power of 2)"
- default "12"
- ---help---
- The IPVS connection hash table uses the chaining scheme to handle
- hash collisions. Using a big IPVS connection hash table will greatly
- reduce conflicts when there are hundreds of thousands of connections
- in the hash table.
-
- Note the table size must be power of 2. The table size will be the
- value of 2 to the your input number power. The number to choose is
- from 8 to 20, the default number is 12, which means the table size
- is 4096. Don't input the number too small, otherwise you will lose
- performance on it. You can adapt the table size yourself, according
- to your virtual server application. It is good to set the table size
- not far less than the number of connections per second multiplying
- average lasting time of connection in the table. For example, your
- virtual server gets 200 connections per second, the connection lasts
- for 200 seconds in average in the connection table, the table size
- should be not far less than 200x200, it is good to set the table
- size 32768 (2**15).
-
- Another note that each connection occupies 128 bytes effectively and
- each hash entry uses 8 bytes, so you can estimate how much memory is
- needed for your box.
-
-comment "IPVS transport protocol load balancing support"
-
-config IP_VS_PROTO_TCP
- bool "TCP load balancing support"
- ---help---
- This option enables support for load balancing TCP transport
- protocol. Say Y if unsure.
-
-config IP_VS_PROTO_UDP
- bool "UDP load balancing support"
- ---help---
- This option enables support for load balancing UDP transport
- protocol. Say Y if unsure.
-
-config IP_VS_PROTO_ESP
- bool "ESP load balancing support"
- ---help---
- This option enables support for load balancing ESP (Encapsulation
- Security Payload) transport protocol. Say Y if unsure.
-
-config IP_VS_PROTO_AH
- bool "AH load balancing support"
- ---help---
- This option enables support for load balancing AH (Authentication
- Header) transport protocol. Say Y if unsure.
-
-comment "IPVS scheduler"
-
-config IP_VS_RR
- tristate "round-robin scheduling"
- ---help---
- The robin-robin scheduling algorithm simply directs network
- connections to different real servers in a round-robin manner.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_WRR
- tristate "weighted round-robin scheduling"
- ---help---
- The weighted robin-robin scheduling algorithm directs network
- connections to different real servers based on server weights
- in a round-robin manner. Servers with higher weights receive
- new connections first than those with less weights, and servers
- with higher weights get more connections than those with less
- weights and servers with equal weights get equal connections.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_LC
- tristate "least-connection scheduling"
- ---help---
- The least-connection scheduling algorithm directs network
- connections to the server with the least number of active
- connections.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_WLC
- tristate "weighted least-connection scheduling"
- ---help---
- The weighted least-connection scheduling algorithm directs network
- connections to the server with the least active connections
- normalized by the server weight.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_LBLC
- tristate "locality-based least-connection scheduling"
- ---help---
- The locality-based least-connection scheduling algorithm is for
- destination IP load balancing. It is usually used in cache cluster.
- This algorithm usually directs packet destined for an IP address to
- its server if the server is alive and under load. If the server is
- overloaded (its active connection numbers is larger than its weight)
- and there is a server in its half load, then allocate the weighted
- least-connection server to this IP address.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_LBLCR
- tristate "locality-based least-connection with replication scheduling"
- ---help---
- The locality-based least-connection with replication scheduling
- algorithm is also for destination IP load balancing. It is
- usually used in cache cluster. It differs from the LBLC scheduling
- as follows: the load balancer maintains mappings from a target
- to a set of server nodes that can serve the target. Requests for
- a target are assigned to the least-connection node in the target's
- server set. If all the node in the server set are over loaded,
- it picks up a least-connection node in the cluster and adds it
- in the sever set for the target. If the server set has not been
- modified for the specified time, the most loaded node is removed
- from the server set, in order to avoid high degree of replication.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_DH
- tristate "destination hashing scheduling"
- ---help---
- The destination hashing scheduling algorithm assigns network
- connections to the servers through looking up a statically assigned
- hash table by their destination IP addresses.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_SH
- tristate "source hashing scheduling"
- ---help---
- The source hashing scheduling algorithm assigns network
- connections to the servers through looking up a statically assigned
- hash table by their source IP addresses.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_SED
- tristate "shortest expected delay scheduling"
- ---help---
- The shortest expected delay scheduling algorithm assigns network
- connections to the server with the shortest expected delay. The
- expected delay that the job will experience is (Ci + 1) / Ui if
- sent to the ith server, in which Ci is the number of connections
- on the ith server and Ui is the fixed service rate (weight)
- of the ith server.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-config IP_VS_NQ
- tristate "never queue scheduling"
- ---help---
- The never queue scheduling algorithm adopts a two-speed model.
- When there is an idle server available, the job will be sent to
- the idle server, instead of waiting for a fast one. When there
- is no idle server available, the job will be sent to the server
- that minimize its expected delay (The Shortest Expected Delay
- scheduling algorithm).
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-comment 'IPVS application helper'
-
-config IP_VS_FTP
- tristate "FTP protocol helper"
- depends on IP_VS_PROTO_TCP
- ---help---
- FTP is a protocol that transfers IP address and/or port number in
- the payload. In the virtual server via Network Address Translation,
- the IP address and port number of real servers cannot be sent to
- clients in ftp connections directly, so FTP protocol helper is
- required for tracking the connection and mangling it back to that of
- virtual service.
-
- If you want to compile it in kernel, say Y. To compile it as a
- module, choose M here. If unsure, say N.
-
-endif # IP_VS
diff --git a/net/ipv4/ipvs/Makefile b/net/ipv4/ipvs/Makefile
deleted file mode 100644
index 30e85de9fff..00000000000
--- a/net/ipv4/ipvs/Makefile
+++ /dev/null
@@ -1,34 +0,0 @@
-#
-# Makefile for the IPVS modules on top of IPv4.
-#
-
-# IPVS transport protocol load balancing support
-ip_vs_proto-objs-y :=
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_TCP) += ip_vs_proto_tcp.o
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_UDP) += ip_vs_proto_udp.o
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_ESP) += ip_vs_proto_esp.o
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH) += ip_vs_proto_ah.o
-
-ip_vs-objs := ip_vs_conn.o ip_vs_core.o ip_vs_ctl.o ip_vs_sched.o \
- ip_vs_xmit.o ip_vs_app.o ip_vs_sync.o \
- ip_vs_est.o ip_vs_proto.o \
- $(ip_vs_proto-objs-y)
-
-
-# IPVS core
-obj-$(CONFIG_IP_VS) += ip_vs.o
-
-# IPVS schedulers
-obj-$(CONFIG_IP_VS_RR) += ip_vs_rr.o
-obj-$(CONFIG_IP_VS_WRR) += ip_vs_wrr.o
-obj-$(CONFIG_IP_VS_LC) += ip_vs_lc.o
-obj-$(CONFIG_IP_VS_WLC) += ip_vs_wlc.o
-obj-$(CONFIG_IP_VS_LBLC) += ip_vs_lblc.o
-obj-$(CONFIG_IP_VS_LBLCR) += ip_vs_lblcr.o
-obj-$(CONFIG_IP_VS_DH) += ip_vs_dh.o
-obj-$(CONFIG_IP_VS_SH) += ip_vs_sh.o
-obj-$(CONFIG_IP_VS_SED) += ip_vs_sed.o
-obj-$(CONFIG_IP_VS_NQ) += ip_vs_nq.o
-
-# IPVS application helpers
-obj-$(CONFIG_IP_VS_FTP) += ip_vs_ftp.o
diff --git a/net/ipv4/ipvs/ip_vs_app.c b/net/ipv4/ipvs/ip_vs_app.c
deleted file mode 100644
index 201b8ea3020..00000000000
--- a/net/ipv4/ipvs/ip_vs_app.c
+++ /dev/null
@@ -1,622 +0,0 @@
-/*
- * ip_vs_app.c: Application module support for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Most code here is taken from ip_masq_app.c in kernel 2.2. The difference
- * is that ip_vs_app module handles the reverse direction (incoming requests
- * and outgoing responses).
- *
- * IP_MASQ_APP application masquerading module
- *
- * Author: Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/netfilter.h>
-#include <net/net_namespace.h>
-#include <net/protocol.h>
-#include <net/tcp.h>
-#include <asm/system.h>
-#include <linux/stat.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/mutex.h>
-
-#include <net/ip_vs.h>
-
-EXPORT_SYMBOL(register_ip_vs_app);
-EXPORT_SYMBOL(unregister_ip_vs_app);
-EXPORT_SYMBOL(register_ip_vs_app_inc);
-
-/* ipvs application list head */
-static LIST_HEAD(ip_vs_app_list);
-static DEFINE_MUTEX(__ip_vs_app_mutex);
-
-
-/*
- * Get an ip_vs_app object
- */
-static inline int ip_vs_app_get(struct ip_vs_app *app)
-{
- return try_module_get(app->module);
-}
-
-
-static inline void ip_vs_app_put(struct ip_vs_app *app)
-{
- module_put(app->module);
-}
-
-
-/*
- * Allocate/initialize app incarnation and register it in proto apps.
- */
-static int
-ip_vs_app_inc_new(struct ip_vs_app *app, __u16 proto, __u16 port)
-{
- struct ip_vs_protocol *pp;
- struct ip_vs_app *inc;
- int ret;
-
- if (!(pp = ip_vs_proto_get(proto)))
- return -EPROTONOSUPPORT;
-
- if (!pp->unregister_app)
- return -EOPNOTSUPP;
-
- inc = kmemdup(app, sizeof(*inc), GFP_KERNEL);
- if (!inc)
- return -ENOMEM;
- INIT_LIST_HEAD(&inc->p_list);
- INIT_LIST_HEAD(&inc->incs_list);
- inc->app = app;
- inc->port = htons(port);
- atomic_set(&inc->usecnt, 0);
-
- if (app->timeouts) {
- inc->timeout_table =
- ip_vs_create_timeout_table(app->timeouts,
- app->timeouts_size);
- if (!inc->timeout_table) {
- ret = -ENOMEM;
- goto out;
- }
- }
-
- ret = pp->register_app(inc);
- if (ret)
- goto out;
-
- list_add(&inc->a_list, &app->incs_list);
- IP_VS_DBG(9, "%s application %s:%u registered\n",
- pp->name, inc->name, inc->port);
-
- return 0;
-
- out:
- kfree(inc->timeout_table);
- kfree(inc);
- return ret;
-}
-
-
-/*
- * Release app incarnation
- */
-static void
-ip_vs_app_inc_release(struct ip_vs_app *inc)
-{
- struct ip_vs_protocol *pp;
-
- if (!(pp = ip_vs_proto_get(inc->protocol)))
- return;
-
- if (pp->unregister_app)
- pp->unregister_app(inc);
-
- IP_VS_DBG(9, "%s App %s:%u unregistered\n",
- pp->name, inc->name, inc->port);
-
- list_del(&inc->a_list);
-
- kfree(inc->timeout_table);
- kfree(inc);
-}
-
-
-/*
- * Get reference to app inc (only called from softirq)
- *
- */
-int ip_vs_app_inc_get(struct ip_vs_app *inc)
-{
- int result;
-
- atomic_inc(&inc->usecnt);
- if (unlikely((result = ip_vs_app_get(inc->app)) != 1))
- atomic_dec(&inc->usecnt);
- return result;
-}
-
-
-/*
- * Put the app inc (only called from timer or net softirq)
- */
-void ip_vs_app_inc_put(struct ip_vs_app *inc)
-{
- ip_vs_app_put(inc->app);
- atomic_dec(&inc->usecnt);
-}
-
-
-/*
- * Register an application incarnation in protocol applications
- */
-int
-register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port)
-{
- int result;
-
- mutex_lock(&__ip_vs_app_mutex);
-
- result = ip_vs_app_inc_new(app, proto, port);
-
- mutex_unlock(&__ip_vs_app_mutex);
-
- return result;
-}
-
-
-/*
- * ip_vs_app registration routine
- */
-int register_ip_vs_app(struct ip_vs_app *app)
-{
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- mutex_lock(&__ip_vs_app_mutex);
-
- list_add(&app->a_list, &ip_vs_app_list);
-
- mutex_unlock(&__ip_vs_app_mutex);
-
- return 0;
-}
-
-
-/*
- * ip_vs_app unregistration routine
- * We are sure there are no app incarnations attached to services
- */
-void unregister_ip_vs_app(struct ip_vs_app *app)
-{
- struct ip_vs_app *inc, *nxt;
-
- mutex_lock(&__ip_vs_app_mutex);
-
- list_for_each_entry_safe(inc, nxt, &app->incs_list, a_list) {
- ip_vs_app_inc_release(inc);
- }
-
- list_del(&app->a_list);
-
- mutex_unlock(&__ip_vs_app_mutex);
-
- /* decrease the module use count */
- ip_vs_use_count_dec();
-}
-
-
-/*
- * Bind ip_vs_conn to its ip_vs_app (called by cp constructor)
- */
-int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp)
-{
- return pp->app_conn_bind(cp);
-}
-
-
-/*
- * Unbind cp from application incarnation (called by cp destructor)
- */
-void ip_vs_unbind_app(struct ip_vs_conn *cp)
-{
- struct ip_vs_app *inc = cp->app;
-
- if (!inc)
- return;
-
- if (inc->unbind_conn)
- inc->unbind_conn(inc, cp);
- if (inc->done_conn)
- inc->done_conn(inc, cp);
- ip_vs_app_inc_put(inc);
- cp->app = NULL;
-}
-
-
-/*
- * Fixes th->seq based on ip_vs_seq info.
- */
-static inline void vs_fix_seq(const struct ip_vs_seq *vseq, struct tcphdr *th)
-{
- __u32 seq = ntohl(th->seq);
-
- /*
- * Adjust seq with delta-offset for all packets after
- * the most recent resized pkt seq and with previous_delta offset
- * for all packets before most recent resized pkt seq.
- */
- if (vseq->delta || vseq->previous_delta) {
- if(after(seq, vseq->init_seq)) {
- th->seq = htonl(seq + vseq->delta);
- IP_VS_DBG(9, "vs_fix_seq(): added delta (%d) to seq\n",
- vseq->delta);
- } else {
- th->seq = htonl(seq + vseq->previous_delta);
- IP_VS_DBG(9, "vs_fix_seq(): added previous_delta "
- "(%d) to seq\n", vseq->previous_delta);
- }
- }
-}
-
-
-/*
- * Fixes th->ack_seq based on ip_vs_seq info.
- */
-static inline void
-vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th)
-{
- __u32 ack_seq = ntohl(th->ack_seq);
-
- /*
- * Adjust ack_seq with delta-offset for
- * the packets AFTER most recent resized pkt has caused a shift
- * for packets before most recent resized pkt, use previous_delta
- */
- if (vseq->delta || vseq->previous_delta) {
- /* since ack_seq is the number of octet that is expected
- to receive next, so compare it with init_seq+delta */
- if(after(ack_seq, vseq->init_seq+vseq->delta)) {
- th->ack_seq = htonl(ack_seq - vseq->delta);
- IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted delta "
- "(%d) from ack_seq\n", vseq->delta);
-
- } else {
- th->ack_seq = htonl(ack_seq - vseq->previous_delta);
- IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted "
- "previous_delta (%d) from ack_seq\n",
- vseq->previous_delta);
- }
- }
-}
-
-
-/*
- * Updates ip_vs_seq if pkt has been resized
- * Assumes already checked proto==IPPROTO_TCP and diff!=0.
- */
-static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq,
- unsigned flag, __u32 seq, int diff)
-{
- /* spinlock is to keep updating cp->flags atomic */
- spin_lock(&cp->lock);
- if (!(cp->flags & flag) || after(seq, vseq->init_seq)) {
- vseq->previous_delta = vseq->delta;
- vseq->delta += diff;
- vseq->init_seq = seq;
- cp->flags |= flag;
- }
- spin_unlock(&cp->lock);
-}
-
-static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb,
- struct ip_vs_app *app)
-{
- int diff;
- const unsigned int tcp_offset = ip_hdrlen(skb);
- struct tcphdr *th;
- __u32 seq;
-
- if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
- return 0;
-
- th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
-
- /*
- * Remember seq number in case this pkt gets resized
- */
- seq = ntohl(th->seq);
-
- /*
- * Fix seq stuff if flagged as so.
- */
- if (cp->flags & IP_VS_CONN_F_OUT_SEQ)
- vs_fix_seq(&cp->out_seq, th);
- if (cp->flags & IP_VS_CONN_F_IN_SEQ)
- vs_fix_ack_seq(&cp->in_seq, th);
-
- /*
- * Call private output hook function
- */
- if (app->pkt_out == NULL)
- return 1;
-
- if (!app->pkt_out(app, cp, skb, &diff))
- return 0;
-
- /*
- * Update ip_vs seq stuff if len has changed.
- */
- if (diff != 0)
- vs_seq_update(cp, &cp->out_seq,
- IP_VS_CONN_F_OUT_SEQ, seq, diff);
-
- return 1;
-}
-
-/*
- * Output pkt hook. Will call bound ip_vs_app specific function
- * called by ipvs packet handler, assumes previously checked cp!=NULL
- * returns false if it can't handle packet (oom)
- */
-int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb)
-{
- struct ip_vs_app *app;
-
- /*
- * check if application module is bound to
- * this ip_vs_conn.
- */
- if ((app = cp->app) == NULL)
- return 1;
-
- /* TCP is complicated */
- if (cp->protocol == IPPROTO_TCP)
- return app_tcp_pkt_out(cp, skb, app);
-
- /*
- * Call private output hook function
- */
- if (app->pkt_out == NULL)
- return 1;
-
- return app->pkt_out(app, cp, skb, NULL);
-}
-
-
-static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb,
- struct ip_vs_app *app)
-{
- int diff;
- const unsigned int tcp_offset = ip_hdrlen(skb);
- struct tcphdr *th;
- __u32 seq;
-
- if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
- return 0;
-
- th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
-
- /*
- * Remember seq number in case this pkt gets resized
- */
- seq = ntohl(th->seq);
-
- /*
- * Fix seq stuff if flagged as so.
- */
- if (cp->flags & IP_VS_CONN_F_IN_SEQ)
- vs_fix_seq(&cp->in_seq, th);
- if (cp->flags & IP_VS_CONN_F_OUT_SEQ)
- vs_fix_ack_seq(&cp->out_seq, th);
-
- /*
- * Call private input hook function
- */
- if (app->pkt_in == NULL)
- return 1;
-
- if (!app->pkt_in(app, cp, skb, &diff))
- return 0;
-
- /*
- * Update ip_vs seq stuff if len has changed.
- */
- if (diff != 0)
- vs_seq_update(cp, &cp->in_seq,
- IP_VS_CONN_F_IN_SEQ, seq, diff);
-
- return 1;
-}
-
-/*
- * Input pkt hook. Will call bound ip_vs_app specific function
- * called by ipvs packet handler, assumes previously checked cp!=NULL.
- * returns false if can't handle packet (oom).
- */
-int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb)
-{
- struct ip_vs_app *app;
-
- /*
- * check if application module is bound to
- * this ip_vs_conn.
- */
- if ((app = cp->app) == NULL)
- return 1;
-
- /* TCP is complicated */
- if (cp->protocol == IPPROTO_TCP)
- return app_tcp_pkt_in(cp, skb, app);
-
- /*
- * Call private input hook function
- */
- if (app->pkt_in == NULL)
- return 1;
-
- return app->pkt_in(app, cp, skb, NULL);
-}
-
-
-#ifdef CONFIG_PROC_FS
-/*
- * /proc/net/ip_vs_app entry function
- */
-
-static struct ip_vs_app *ip_vs_app_idx(loff_t pos)
-{
- struct ip_vs_app *app, *inc;
-
- list_for_each_entry(app, &ip_vs_app_list, a_list) {
- list_for_each_entry(inc, &app->incs_list, a_list) {
- if (pos-- == 0)
- return inc;
- }
- }
- return NULL;
-
-}
-
-static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos)
-{
- mutex_lock(&__ip_vs_app_mutex);
-
- return *pos ? ip_vs_app_idx(*pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *ip_vs_app_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct ip_vs_app *inc, *app;
- struct list_head *e;
-
- ++*pos;
- if (v == SEQ_START_TOKEN)
- return ip_vs_app_idx(0);
-
- inc = v;
- app = inc->app;
-
- if ((e = inc->a_list.next) != &app->incs_list)
- return list_entry(e, struct ip_vs_app, a_list);
-
- /* go on to next application */
- for (e = app->a_list.next; e != &ip_vs_app_list; e = e->next) {
- app = list_entry(e, struct ip_vs_app, a_list);
- list_for_each_entry(inc, &app->incs_list, a_list) {
- return inc;
- }
- }
- return NULL;
-}
-
-static void ip_vs_app_seq_stop(struct seq_file *seq, void *v)
-{
- mutex_unlock(&__ip_vs_app_mutex);
-}
-
-static int ip_vs_app_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "prot port usecnt name\n");
- else {
- const struct ip_vs_app *inc = v;
-
- seq_printf(seq, "%-3s %-7u %-6d %-17s\n",
- ip_vs_proto_name(inc->protocol),
- ntohs(inc->port),
- atomic_read(&inc->usecnt),
- inc->name);
- }
- return 0;
-}
-
-static const struct seq_operations ip_vs_app_seq_ops = {
- .start = ip_vs_app_seq_start,
- .next = ip_vs_app_seq_next,
- .stop = ip_vs_app_seq_stop,
- .show = ip_vs_app_seq_show,
-};
-
-static int ip_vs_app_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &ip_vs_app_seq_ops);
-}
-
-static const struct file_operations ip_vs_app_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_app_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-#endif
-
-
-/*
- * Replace a segment of data with a new segment
- */
-int ip_vs_skb_replace(struct sk_buff *skb, gfp_t pri,
- char *o_buf, int o_len, char *n_buf, int n_len)
-{
- int diff;
- int o_offset;
- int o_left;
-
- EnterFunction(9);
-
- diff = n_len - o_len;
- o_offset = o_buf - (char *)skb->data;
- /* The length of left data after o_buf+o_len in the skb data */
- o_left = skb->len - (o_offset + o_len);
-
- if (diff <= 0) {
- memmove(o_buf + n_len, o_buf + o_len, o_left);
- memcpy(o_buf, n_buf, n_len);
- skb_trim(skb, skb->len + diff);
- } else if (diff <= skb_tailroom(skb)) {
- skb_put(skb, diff);
- memmove(o_buf + n_len, o_buf + o_len, o_left);
- memcpy(o_buf, n_buf, n_len);
- } else {
- if (pskb_expand_head(skb, skb_headroom(skb), diff, pri))
- return -ENOMEM;
- skb_put(skb, diff);
- memmove(skb->data + o_offset + n_len,
- skb->data + o_offset + o_len, o_left);
- skb_copy_to_linear_data_offset(skb, o_offset, n_buf, n_len);
- }
-
- /* must update the iph total length here */
- ip_hdr(skb)->tot_len = htons(skb->len);
-
- LeaveFunction(9);
- return 0;
-}
-
-
-int __init ip_vs_app_init(void)
-{
- /* we will replace it with proc_net_ipvs_create() soon */
- proc_net_fops_create(&init_net, "ip_vs_app", 0, &ip_vs_app_fops);
- return 0;
-}
-
-
-void ip_vs_app_cleanup(void)
-{
- proc_net_remove(&init_net, "ip_vs_app");
-}
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/ipv4/ipvs/ip_vs_conn.c
deleted file mode 100644
index 44a6872dc24..00000000000
--- a/net/ipv4/ipvs/ip_vs_conn.c
+++ /dev/null
@@ -1,1023 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the Netfilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The IPVS code for kernel 2.2 was done by Wensong Zhang and Peter Kese,
- * with changes/fixes from Julian Anastasov, Lars Marowsky-Bree, Horms
- * and others. Many code here is taken from IP MASQ code of kernel 2.2.
- *
- * Changes:
- *
- */
-
-#include <linux/interrupt.h>
-#include <linux/in.h>
-#include <linux/net.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/proc_fs.h> /* for proc_net_* */
-#include <linux/seq_file.h>
-#include <linux/jhash.h>
-#include <linux/random.h>
-
-#include <net/net_namespace.h>
-#include <net/ip_vs.h>
-
-
-/*
- * Connection hash table: for input and output packets lookups of IPVS
- */
-static struct list_head *ip_vs_conn_tab;
-
-/* SLAB cache for IPVS connections */
-static struct kmem_cache *ip_vs_conn_cachep __read_mostly;
-
-/* counter for current IPVS connections */
-static atomic_t ip_vs_conn_count = ATOMIC_INIT(0);
-
-/* counter for no client port connections */
-static atomic_t ip_vs_conn_no_cport_cnt = ATOMIC_INIT(0);
-
-/* random value for IPVS connection hash */
-static unsigned int ip_vs_conn_rnd;
-
-/*
- * Fine locking granularity for big connection hash table
- */
-#define CT_LOCKARRAY_BITS 4
-#define CT_LOCKARRAY_SIZE (1<<CT_LOCKARRAY_BITS)
-#define CT_LOCKARRAY_MASK (CT_LOCKARRAY_SIZE-1)
-
-struct ip_vs_aligned_lock
-{
- rwlock_t l;
-} __attribute__((__aligned__(SMP_CACHE_BYTES)));
-
-/* lock array for conn table */
-static struct ip_vs_aligned_lock
-__ip_vs_conntbl_lock_array[CT_LOCKARRAY_SIZE] __cacheline_aligned;
-
-static inline void ct_read_lock(unsigned key)
-{
- read_lock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_read_unlock(unsigned key)
-{
- read_unlock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_write_lock(unsigned key)
-{
- write_lock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_write_unlock(unsigned key)
-{
- write_unlock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_read_lock_bh(unsigned key)
-{
- read_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_read_unlock_bh(unsigned key)
-{
- read_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_write_lock_bh(unsigned key)
-{
- write_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-static inline void ct_write_unlock_bh(unsigned key)
-{
- write_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
-}
-
-
-/*
- * Returns hash value for IPVS connection entry
- */
-static unsigned int ip_vs_conn_hashkey(unsigned proto, __be32 addr, __be16 port)
-{
- return jhash_3words((__force u32)addr, (__force u32)port, proto, ip_vs_conn_rnd)
- & IP_VS_CONN_TAB_MASK;
-}
-
-
-/*
- * Hashes ip_vs_conn in ip_vs_conn_tab by proto,addr,port.
- * returns bool success.
- */
-static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
-{
- unsigned hash;
- int ret;
-
- /* Hash by protocol, client address and port */
- hash = ip_vs_conn_hashkey(cp->protocol, cp->caddr, cp->cport);
-
- ct_write_lock(hash);
-
- if (!(cp->flags & IP_VS_CONN_F_HASHED)) {
- list_add(&cp->c_list, &ip_vs_conn_tab[hash]);
- cp->flags |= IP_VS_CONN_F_HASHED;
- atomic_inc(&cp->refcnt);
- ret = 1;
- } else {
- IP_VS_ERR("ip_vs_conn_hash(): request for already hashed, "
- "called from %p\n", __builtin_return_address(0));
- ret = 0;
- }
-
- ct_write_unlock(hash);
-
- return ret;
-}
-
-
-/*
- * UNhashes ip_vs_conn from ip_vs_conn_tab.
- * returns bool success.
- */
-static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
-{
- unsigned hash;
- int ret;
-
- /* unhash it and decrease its reference counter */
- hash = ip_vs_conn_hashkey(cp->protocol, cp->caddr, cp->cport);
-
- ct_write_lock(hash);
-
- if (cp->flags & IP_VS_CONN_F_HASHED) {
- list_del(&cp->c_list);
- cp->flags &= ~IP_VS_CONN_F_HASHED;
- atomic_dec(&cp->refcnt);
- ret = 1;
- } else
- ret = 0;
-
- ct_write_unlock(hash);
-
- return ret;
-}
-
-
-/*
- * Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
- * Called for pkts coming from OUTside-to-INside.
- * s_addr, s_port: pkt source address (foreign host)
- * d_addr, d_port: pkt dest address (load balancer)
- */
-static inline struct ip_vs_conn *__ip_vs_conn_in_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port)
-{
- unsigned hash;
- struct ip_vs_conn *cp;
-
- hash = ip_vs_conn_hashkey(protocol, s_addr, s_port);
-
- ct_read_lock(hash);
-
- list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (s_addr==cp->caddr && s_port==cp->cport &&
- d_port==cp->vport && d_addr==cp->vaddr &&
- ((!s_port) ^ (!(cp->flags & IP_VS_CONN_F_NO_CPORT))) &&
- protocol==cp->protocol) {
- /* HIT */
- atomic_inc(&cp->refcnt);
- ct_read_unlock(hash);
- return cp;
- }
- }
-
- ct_read_unlock(hash);
-
- return NULL;
-}
-
-struct ip_vs_conn *ip_vs_conn_in_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port)
-{
- struct ip_vs_conn *cp;
-
- cp = __ip_vs_conn_in_get(protocol, s_addr, s_port, d_addr, d_port);
- if (!cp && atomic_read(&ip_vs_conn_no_cport_cnt))
- cp = __ip_vs_conn_in_get(protocol, s_addr, 0, d_addr, d_port);
-
- IP_VS_DBG(9, "lookup/in %s %u.%u.%u.%u:%d->%u.%u.%u.%u:%d %s\n",
- ip_vs_proto_name(protocol),
- NIPQUAD(s_addr), ntohs(s_port),
- NIPQUAD(d_addr), ntohs(d_port),
- cp?"hit":"not hit");
-
- return cp;
-}
-
-/* Get reference to connection template */
-struct ip_vs_conn *ip_vs_ct_in_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port)
-{
- unsigned hash;
- struct ip_vs_conn *cp;
-
- hash = ip_vs_conn_hashkey(protocol, s_addr, s_port);
-
- ct_read_lock(hash);
-
- list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (s_addr==cp->caddr && s_port==cp->cport &&
- d_port==cp->vport && d_addr==cp->vaddr &&
- cp->flags & IP_VS_CONN_F_TEMPLATE &&
- protocol==cp->protocol) {
- /* HIT */
- atomic_inc(&cp->refcnt);
- goto out;
- }
- }
- cp = NULL;
-
- out:
- ct_read_unlock(hash);
-
- IP_VS_DBG(9, "template lookup/in %s %u.%u.%u.%u:%d->%u.%u.%u.%u:%d %s\n",
- ip_vs_proto_name(protocol),
- NIPQUAD(s_addr), ntohs(s_port),
- NIPQUAD(d_addr), ntohs(d_port),
- cp?"hit":"not hit");
-
- return cp;
-}
-
-/*
- * Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
- * Called for pkts coming from inside-to-OUTside.
- * s_addr, s_port: pkt source address (inside host)
- * d_addr, d_port: pkt dest address (foreign host)
- */
-struct ip_vs_conn *ip_vs_conn_out_get
-(int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port)
-{
- unsigned hash;
- struct ip_vs_conn *cp, *ret=NULL;
-
- /*
- * Check for "full" addressed entries
- */
- hash = ip_vs_conn_hashkey(protocol, d_addr, d_port);
-
- ct_read_lock(hash);
-
- list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (d_addr == cp->caddr && d_port == cp->cport &&
- s_port == cp->dport && s_addr == cp->daddr &&
- protocol == cp->protocol) {
- /* HIT */
- atomic_inc(&cp->refcnt);
- ret = cp;
- break;
- }
- }
-
- ct_read_unlock(hash);
-
- IP_VS_DBG(9, "lookup/out %s %u.%u.%u.%u:%d->%u.%u.%u.%u:%d %s\n",
- ip_vs_proto_name(protocol),
- NIPQUAD(s_addr), ntohs(s_port),
- NIPQUAD(d_addr), ntohs(d_port),
- ret?"hit":"not hit");
-
- return ret;
-}
-
-
-/*
- * Put back the conn and restart its timer with its timeout
- */
-void ip_vs_conn_put(struct ip_vs_conn *cp)
-{
- /* reset it expire in its timeout */
- mod_timer(&cp->timer, jiffies+cp->timeout);
-
- __ip_vs_conn_put(cp);
-}
-
-
-/*
- * Fill a no_client_port connection with a client port number
- */
-void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport)
-{
- if (ip_vs_conn_unhash(cp)) {
- spin_lock(&cp->lock);
- if (cp->flags & IP_VS_CONN_F_NO_CPORT) {
- atomic_dec(&ip_vs_conn_no_cport_cnt);
- cp->flags &= ~IP_VS_CONN_F_NO_CPORT;
- cp->cport = cport;
- }
- spin_unlock(&cp->lock);
-
- /* hash on new dport */
- ip_vs_conn_hash(cp);
- }
-}
-
-
-/*
- * Bind a connection entry with the corresponding packet_xmit.
- * Called by ip_vs_conn_new.
- */
-static inline void ip_vs_bind_xmit(struct ip_vs_conn *cp)
-{
- switch (IP_VS_FWD_METHOD(cp)) {
- case IP_VS_CONN_F_MASQ:
- cp->packet_xmit = ip_vs_nat_xmit;
- break;
-
- case IP_VS_CONN_F_TUNNEL:
- cp->packet_xmit = ip_vs_tunnel_xmit;
- break;
-
- case IP_VS_CONN_F_DROUTE:
- cp->packet_xmit = ip_vs_dr_xmit;
- break;
-
- case IP_VS_CONN_F_LOCALNODE:
- cp->packet_xmit = ip_vs_null_xmit;
- break;
-
- case IP_VS_CONN_F_BYPASS:
- cp->packet_xmit = ip_vs_bypass_xmit;
- break;
- }
-}
-
-
-static inline int ip_vs_dest_totalconns(struct ip_vs_dest *dest)
-{
- return atomic_read(&dest->activeconns)
- + atomic_read(&dest->inactconns);
-}
-
-/*
- * Bind a connection entry with a virtual service destination
- * Called just after a new connection entry is created.
- */
-static inline void
-ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
-{
- /* if dest is NULL, then return directly */
- if (!dest)
- return;
-
- /* Increase the refcnt counter of the dest */
- atomic_inc(&dest->refcnt);
-
- /* Bind with the destination and its corresponding transmitter */
- if ((cp->flags & IP_VS_CONN_F_SYNC) &&
- (!(cp->flags & IP_VS_CONN_F_TEMPLATE)))
- /* if the connection is not template and is created
- * by sync, preserve the activity flag.
- */
- cp->flags |= atomic_read(&dest->conn_flags) &
- (~IP_VS_CONN_F_INACTIVE);
- else
- cp->flags |= atomic_read(&dest->conn_flags);
- cp->dest = dest;
-
- IP_VS_DBG(7, "Bind-dest %s c:%u.%u.%u.%u:%d v:%u.%u.%u.%u:%d "
- "d:%u.%u.%u.%u:%d fwd:%c s:%u conn->flags:%X conn->refcnt:%d "
- "dest->refcnt:%d\n",
- ip_vs_proto_name(cp->protocol),
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- NIPQUAD(cp->vaddr), ntohs(cp->vport),
- NIPQUAD(cp->daddr), ntohs(cp->dport),
- ip_vs_fwd_tag(cp), cp->state,
- cp->flags, atomic_read(&cp->refcnt),
- atomic_read(&dest->refcnt));
-
- /* Update the connection counters */
- if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
- /* It is a normal connection, so increase the inactive
- connection counter because it is in TCP SYNRECV
- state (inactive) or other protocol inacive state */
- if ((cp->flags & IP_VS_CONN_F_SYNC) &&
- (!(cp->flags & IP_VS_CONN_F_INACTIVE)))
- atomic_inc(&dest->activeconns);
- else
- atomic_inc(&dest->inactconns);
- } else {
- /* It is a persistent connection/template, so increase
- the peristent connection counter */
- atomic_inc(&dest->persistconns);
- }
-
- if (dest->u_threshold != 0 &&
- ip_vs_dest_totalconns(dest) >= dest->u_threshold)
- dest->flags |= IP_VS_DEST_F_OVERLOAD;
-}
-
-
-/*
- * Check if there is a destination for the connection, if so
- * bind the connection to the destination.
- */
-struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp)
-{
- struct ip_vs_dest *dest;
-
- if ((cp) && (!cp->dest)) {
- dest = ip_vs_find_dest(cp->daddr, cp->dport,
- cp->vaddr, cp->vport, cp->protocol);
- ip_vs_bind_dest(cp, dest);
- return dest;
- } else
- return NULL;
-}
-
-
-/*
- * Unbind a connection entry with its VS destination
- * Called by the ip_vs_conn_expire function.
- */
-static inline void ip_vs_unbind_dest(struct ip_vs_conn *cp)
-{
- struct ip_vs_dest *dest = cp->dest;
-
- if (!dest)
- return;
-
- IP_VS_DBG(7, "Unbind-dest %s c:%u.%u.%u.%u:%d v:%u.%u.%u.%u:%d "
- "d:%u.%u.%u.%u:%d fwd:%c s:%u conn->flags:%X conn->refcnt:%d "
- "dest->refcnt:%d\n",
- ip_vs_proto_name(cp->protocol),
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- NIPQUAD(cp->vaddr), ntohs(cp->vport),
- NIPQUAD(cp->daddr), ntohs(cp->dport),
- ip_vs_fwd_tag(cp), cp->state,
- cp->flags, atomic_read(&cp->refcnt),
- atomic_read(&dest->refcnt));
-
- /* Update the connection counters */
- if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
- /* It is a normal connection, so decrease the inactconns
- or activeconns counter */
- if (cp->flags & IP_VS_CONN_F_INACTIVE) {
- atomic_dec(&dest->inactconns);
- } else {
- atomic_dec(&dest->activeconns);
- }
- } else {
- /* It is a persistent connection/template, so decrease
- the peristent connection counter */
- atomic_dec(&dest->persistconns);
- }
-
- if (dest->l_threshold != 0) {
- if (ip_vs_dest_totalconns(dest) < dest->l_threshold)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- } else if (dest->u_threshold != 0) {
- if (ip_vs_dest_totalconns(dest) * 4 < dest->u_threshold * 3)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- } else {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- }
-
- /*
- * Simply decrease the refcnt of the dest, because the
- * dest will be either in service's destination list
- * or in the trash.
- */
- atomic_dec(&dest->refcnt);
-}
-
-
-/*
- * Checking if the destination of a connection template is available.
- * If available, return 1, otherwise invalidate this connection
- * template and return 0.
- */
-int ip_vs_check_template(struct ip_vs_conn *ct)
-{
- struct ip_vs_dest *dest = ct->dest;
-
- /*
- * Checking the dest server status.
- */
- if ((dest == NULL) ||
- !(dest->flags & IP_VS_DEST_F_AVAILABLE) ||
- (sysctl_ip_vs_expire_quiescent_template &&
- (atomic_read(&dest->weight) == 0))) {
- IP_VS_DBG(9, "check_template: dest not available for "
- "protocol %s s:%u.%u.%u.%u:%d v:%u.%u.%u.%u:%d "
- "-> d:%u.%u.%u.%u:%d\n",
- ip_vs_proto_name(ct->protocol),
- NIPQUAD(ct->caddr), ntohs(ct->cport),
- NIPQUAD(ct->vaddr), ntohs(ct->vport),
- NIPQUAD(ct->daddr), ntohs(ct->dport));
-
- /*
- * Invalidate the connection template
- */
- if (ct->vport != htons(0xffff)) {
- if (ip_vs_conn_unhash(ct)) {
- ct->dport = htons(0xffff);
- ct->vport = htons(0xffff);
- ct->cport = 0;
- ip_vs_conn_hash(ct);
- }
- }
-
- /*
- * Simply decrease the refcnt of the template,
- * don't restart its timer.
- */
- atomic_dec(&ct->refcnt);
- return 0;
- }
- return 1;
-}
-
-static void ip_vs_conn_expire(unsigned long data)
-{
- struct ip_vs_conn *cp = (struct ip_vs_conn *)data;
-
- cp->timeout = 60*HZ;
-
- /*
- * hey, I'm using it
- */
- atomic_inc(&cp->refcnt);
-
- /*
- * do I control anybody?
- */
- if (atomic_read(&cp->n_control))
- goto expire_later;
-
- /*
- * unhash it if it is hashed in the conn table
- */
- if (!ip_vs_conn_unhash(cp))
- goto expire_later;
-
- /*
- * refcnt==1 implies I'm the only one referrer
- */
- if (likely(atomic_read(&cp->refcnt) == 1)) {
- /* delete the timer if it is activated by other users */
- if (timer_pending(&cp->timer))
- del_timer(&cp->timer);
-
- /* does anybody control me? */
- if (cp->control)
- ip_vs_control_del(cp);
-
- if (unlikely(cp->app != NULL))
- ip_vs_unbind_app(cp);
- ip_vs_unbind_dest(cp);
- if (cp->flags & IP_VS_CONN_F_NO_CPORT)
- atomic_dec(&ip_vs_conn_no_cport_cnt);
- atomic_dec(&ip_vs_conn_count);
-
- kmem_cache_free(ip_vs_conn_cachep, cp);
- return;
- }
-
- /* hash it back to the table */
- ip_vs_conn_hash(cp);
-
- expire_later:
- IP_VS_DBG(7, "delayed: conn->refcnt-1=%d conn->n_control=%d\n",
- atomic_read(&cp->refcnt)-1,
- atomic_read(&cp->n_control));
-
- ip_vs_conn_put(cp);
-}
-
-
-void ip_vs_conn_expire_now(struct ip_vs_conn *cp)
-{
- if (del_timer(&cp->timer))
- mod_timer(&cp->timer, jiffies);
-}
-
-
-/*
- * Create a new connection entry and hash it into the ip_vs_conn_tab
- */
-struct ip_vs_conn *
-ip_vs_conn_new(int proto, __be32 caddr, __be16 cport, __be32 vaddr, __be16 vport,
- __be32 daddr, __be16 dport, unsigned flags,
- struct ip_vs_dest *dest)
-{
- struct ip_vs_conn *cp;
- struct ip_vs_protocol *pp = ip_vs_proto_get(proto);
-
- cp = kmem_cache_zalloc(ip_vs_conn_cachep, GFP_ATOMIC);
- if (cp == NULL) {
- IP_VS_ERR_RL("ip_vs_conn_new: no memory available.\n");
- return NULL;
- }
-
- INIT_LIST_HEAD(&cp->c_list);
- setup_timer(&cp->timer, ip_vs_conn_expire, (unsigned long)cp);
- cp->protocol = proto;
- cp->caddr = caddr;
- cp->cport = cport;
- cp->vaddr = vaddr;
- cp->vport = vport;
- cp->daddr = daddr;
- cp->dport = dport;
- cp->flags = flags;
- spin_lock_init(&cp->lock);
-
- /*
- * Set the entry is referenced by the current thread before hashing
- * it in the table, so that other thread run ip_vs_random_dropentry
- * but cannot drop this entry.
- */
- atomic_set(&cp->refcnt, 1);
-
- atomic_set(&cp->n_control, 0);
- atomic_set(&cp->in_pkts, 0);
-
- atomic_inc(&ip_vs_conn_count);
- if (flags & IP_VS_CONN_F_NO_CPORT)
- atomic_inc(&ip_vs_conn_no_cport_cnt);
-
- /* Bind the connection with a destination server */
- ip_vs_bind_dest(cp, dest);
-
- /* Set its state and timeout */
- cp->state = 0;
- cp->timeout = 3*HZ;
-
- /* Bind its packet transmitter */
- ip_vs_bind_xmit(cp);
-
- if (unlikely(pp && atomic_read(&pp->appcnt)))
- ip_vs_bind_app(cp, pp);
-
- /* Hash it in the ip_vs_conn_tab finally */
- ip_vs_conn_hash(cp);
-
- return cp;
-}
-
-
-/*
- * /proc/net/ip_vs_conn entries
- */
-#ifdef CONFIG_PROC_FS
-
-static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos)
-{
- int idx;
- struct ip_vs_conn *cp;
-
- for(idx = 0; idx < IP_VS_CONN_TAB_SIZE; idx++) {
- ct_read_lock_bh(idx);
- list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
- if (pos-- == 0) {
- seq->private = &ip_vs_conn_tab[idx];
- return cp;
- }
- }
- ct_read_unlock_bh(idx);
- }
-
- return NULL;
-}
-
-static void *ip_vs_conn_seq_start(struct seq_file *seq, loff_t *pos)
-{
- seq->private = NULL;
- return *pos ? ip_vs_conn_array(seq, *pos - 1) :SEQ_START_TOKEN;
-}
-
-static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct ip_vs_conn *cp = v;
- struct list_head *e, *l = seq->private;
- int idx;
-
- ++*pos;
- if (v == SEQ_START_TOKEN)
- return ip_vs_conn_array(seq, 0);
-
- /* more on same hash chain? */
- if ((e = cp->c_list.next) != l)
- return list_entry(e, struct ip_vs_conn, c_list);
-
- idx = l - ip_vs_conn_tab;
- ct_read_unlock_bh(idx);
-
- while (++idx < IP_VS_CONN_TAB_SIZE) {
- ct_read_lock_bh(idx);
- list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
- seq->private = &ip_vs_conn_tab[idx];
- return cp;
- }
- ct_read_unlock_bh(idx);
- }
- seq->private = NULL;
- return NULL;
-}
-
-static void ip_vs_conn_seq_stop(struct seq_file *seq, void *v)
-{
- struct list_head *l = seq->private;
-
- if (l)
- ct_read_unlock_bh(l - ip_vs_conn_tab);
-}
-
-static int ip_vs_conn_seq_show(struct seq_file *seq, void *v)
-{
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Expires\n");
- else {
- const struct ip_vs_conn *cp = v;
-
- seq_printf(seq,
- "%-3s %08X %04X %08X %04X %08X %04X %-11s %7lu\n",
- ip_vs_proto_name(cp->protocol),
- ntohl(cp->caddr), ntohs(cp->cport),
- ntohl(cp->vaddr), ntohs(cp->vport),
- ntohl(cp->daddr), ntohs(cp->dport),
- ip_vs_state_name(cp->protocol, cp->state),
- (cp->timer.expires-jiffies)/HZ);
- }
- return 0;
-}
-
-static const struct seq_operations ip_vs_conn_seq_ops = {
- .start = ip_vs_conn_seq_start,
- .next = ip_vs_conn_seq_next,
- .stop = ip_vs_conn_seq_stop,
- .show = ip_vs_conn_seq_show,
-};
-
-static int ip_vs_conn_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &ip_vs_conn_seq_ops);
-}
-
-static const struct file_operations ip_vs_conn_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_conn_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static const char *ip_vs_origin_name(unsigned flags)
-{
- if (flags & IP_VS_CONN_F_SYNC)
- return "SYNC";
- else
- return "LOCAL";
-}
-
-static int ip_vs_conn_sync_seq_show(struct seq_file *seq, void *v)
-{
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "Pro FromIP FPrt ToIP TPrt DestIP DPrt State Origin Expires\n");
- else {
- const struct ip_vs_conn *cp = v;
-
- seq_printf(seq,
- "%-3s %08X %04X %08X %04X %08X %04X %-11s %-6s %7lu\n",
- ip_vs_proto_name(cp->protocol),
- ntohl(cp->caddr), ntohs(cp->cport),
- ntohl(cp->vaddr), ntohs(cp->vport),
- ntohl(cp->daddr), ntohs(cp->dport),
- ip_vs_state_name(cp->protocol, cp->state),
- ip_vs_origin_name(cp->flags),
- (cp->timer.expires-jiffies)/HZ);
- }
- return 0;
-}
-
-static const struct seq_operations ip_vs_conn_sync_seq_ops = {
- .start = ip_vs_conn_seq_start,
- .next = ip_vs_conn_seq_next,
- .stop = ip_vs_conn_seq_stop,
- .show = ip_vs_conn_sync_seq_show,
-};
-
-static int ip_vs_conn_sync_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &ip_vs_conn_sync_seq_ops);
-}
-
-static const struct file_operations ip_vs_conn_sync_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_conn_sync_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-#endif
-
-
-/*
- * Randomly drop connection entries before running out of memory
- */
-static inline int todrop_entry(struct ip_vs_conn *cp)
-{
- /*
- * The drop rate array needs tuning for real environments.
- * Called from timer bh only => no locking
- */
- static const char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
- static char todrop_counter[9] = {0};
- int i;
-
- /* if the conn entry hasn't lasted for 60 seconds, don't drop it.
- This will leave enough time for normal connection to get
- through. */
- if (time_before(cp->timeout + jiffies, cp->timer.expires + 60*HZ))
- return 0;
-
- /* Don't drop the entry if its number of incoming packets is not
- located in [0, 8] */
- i = atomic_read(&cp->in_pkts);
- if (i > 8 || i < 0) return 0;
-
- if (!todrop_rate[i]) return 0;
- if (--todrop_counter[i] > 0) return 0;
-
- todrop_counter[i] = todrop_rate[i];
- return 1;
-}
-
-/* Called from keventd and must protect itself from softirqs */
-void ip_vs_random_dropentry(void)
-{
- int idx;
- struct ip_vs_conn *cp;
-
- /*
- * Randomly scan 1/32 of the whole table every second
- */
- for (idx = 0; idx < (IP_VS_CONN_TAB_SIZE>>5); idx++) {
- unsigned hash = net_random() & IP_VS_CONN_TAB_MASK;
-
- /*
- * Lock is actually needed in this loop.
- */
- ct_write_lock_bh(hash);
-
- list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (cp->flags & IP_VS_CONN_F_TEMPLATE)
- /* connection template */
- continue;
-
- if (cp->protocol == IPPROTO_TCP) {
- switch(cp->state) {
- case IP_VS_TCP_S_SYN_RECV:
- case IP_VS_TCP_S_SYNACK:
- break;
-
- case IP_VS_TCP_S_ESTABLISHED:
- if (todrop_entry(cp))
- break;
- continue;
-
- default:
- continue;
- }
- } else {
- if (!todrop_entry(cp))
- continue;
- }
-
- IP_VS_DBG(4, "del connection\n");
- ip_vs_conn_expire_now(cp);
- if (cp->control) {
- IP_VS_DBG(4, "del conn template\n");
- ip_vs_conn_expire_now(cp->control);
- }
- }
- ct_write_unlock_bh(hash);
- }
-}
-
-
-/*
- * Flush all the connection entries in the ip_vs_conn_tab
- */
-static void ip_vs_conn_flush(void)
-{
- int idx;
- struct ip_vs_conn *cp;
-
- flush_again:
- for (idx=0; idx<IP_VS_CONN_TAB_SIZE; idx++) {
- /*
- * Lock is actually needed in this loop.
- */
- ct_write_lock_bh(idx);
-
- list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
-
- IP_VS_DBG(4, "del connection\n");
- ip_vs_conn_expire_now(cp);
- if (cp->control) {
- IP_VS_DBG(4, "del conn template\n");
- ip_vs_conn_expire_now(cp->control);
- }
- }
- ct_write_unlock_bh(idx);
- }
-
- /* the counter may be not NULL, because maybe some conn entries
- are run by slow timer handler or unhashed but still referred */
- if (atomic_read(&ip_vs_conn_count) != 0) {
- schedule();
- goto flush_again;
- }
-}
-
-
-int __init ip_vs_conn_init(void)
-{
- int idx;
-
- /*
- * Allocate the connection hash table and initialize its list heads
- */
- ip_vs_conn_tab = vmalloc(IP_VS_CONN_TAB_SIZE*sizeof(struct list_head));
- if (!ip_vs_conn_tab)
- return -ENOMEM;
-
- /* Allocate ip_vs_conn slab cache */
- ip_vs_conn_cachep = kmem_cache_create("ip_vs_conn",
- sizeof(struct ip_vs_conn), 0,
- SLAB_HWCACHE_ALIGN, NULL);
- if (!ip_vs_conn_cachep) {
- vfree(ip_vs_conn_tab);
- return -ENOMEM;
- }
-
- IP_VS_INFO("Connection hash table configured "
- "(size=%d, memory=%ldKbytes)\n",
- IP_VS_CONN_TAB_SIZE,
- (long)(IP_VS_CONN_TAB_SIZE*sizeof(struct list_head))/1024);
- IP_VS_DBG(0, "Each connection entry needs %Zd bytes at least\n",
- sizeof(struct ip_vs_conn));
-
- for (idx = 0; idx < IP_VS_CONN_TAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_conn_tab[idx]);
- }
-
- for (idx = 0; idx < CT_LOCKARRAY_SIZE; idx++) {
- rwlock_init(&__ip_vs_conntbl_lock_array[idx].l);
- }
-
- proc_net_fops_create(&init_net, "ip_vs_conn", 0, &ip_vs_conn_fops);
- proc_net_fops_create(&init_net, "ip_vs_conn_sync", 0, &ip_vs_conn_sync_fops);
-
- /* calculate the random value for connection hash */
- get_random_bytes(&ip_vs_conn_rnd, sizeof(ip_vs_conn_rnd));
-
- return 0;
-}
-
-
-void ip_vs_conn_cleanup(void)
-{
- /* flush all the connection entries first */
- ip_vs_conn_flush();
-
- /* Release the empty cache */
- kmem_cache_destroy(ip_vs_conn_cachep);
- proc_net_remove(&init_net, "ip_vs_conn");
- proc_net_remove(&init_net, "ip_vs_conn_sync");
- vfree(ip_vs_conn_tab);
-}
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
deleted file mode 100644
index a7879eafc3b..00000000000
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ /dev/null
@@ -1,1125 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the Netfilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The IPVS code for kernel 2.2 was done by Wensong Zhang and Peter Kese,
- * with changes/fixes from Julian Anastasov, Lars Marowsky-Bree, Horms
- * and others.
- *
- * Changes:
- * Paul `Rusty' Russell properly handle non-linear skbs
- * Harald Welte don't use nfcache
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/ip.h>
-#include <linux/tcp.h>
-#include <linux/icmp.h>
-
-#include <net/ip.h>
-#include <net/tcp.h>
-#include <net/udp.h>
-#include <net/icmp.h> /* for icmp_send */
-#include <net/route.h>
-
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-EXPORT_SYMBOL(register_ip_vs_scheduler);
-EXPORT_SYMBOL(unregister_ip_vs_scheduler);
-EXPORT_SYMBOL(ip_vs_skb_replace);
-EXPORT_SYMBOL(ip_vs_proto_name);
-EXPORT_SYMBOL(ip_vs_conn_new);
-EXPORT_SYMBOL(ip_vs_conn_in_get);
-EXPORT_SYMBOL(ip_vs_conn_out_get);
-#ifdef CONFIG_IP_VS_PROTO_TCP
-EXPORT_SYMBOL(ip_vs_tcp_conn_listen);
-#endif
-EXPORT_SYMBOL(ip_vs_conn_put);
-#ifdef CONFIG_IP_VS_DEBUG
-EXPORT_SYMBOL(ip_vs_get_debug_level);
-#endif
-
-
-/* ID used in ICMP lookups */
-#define icmp_id(icmph) (((icmph)->un).echo.id)
-
-const char *ip_vs_proto_name(unsigned proto)
-{
- static char buf[20];
-
- switch (proto) {
- case IPPROTO_IP:
- return "IP";
- case IPPROTO_UDP:
- return "UDP";
- case IPPROTO_TCP:
- return "TCP";
- case IPPROTO_ICMP:
- return "ICMP";
- default:
- sprintf(buf, "IP_%d", proto);
- return buf;
- }
-}
-
-void ip_vs_init_hash_table(struct list_head *table, int rows)
-{
- while (--rows >= 0)
- INIT_LIST_HEAD(&table[rows]);
-}
-
-static inline void
-ip_vs_in_stats(struct ip_vs_conn *cp, struct sk_buff *skb)
-{
- struct ip_vs_dest *dest = cp->dest;
- if (dest && (dest->flags & IP_VS_DEST_F_AVAILABLE)) {
- spin_lock(&dest->stats.lock);
- dest->stats.inpkts++;
- dest->stats.inbytes += skb->len;
- spin_unlock(&dest->stats.lock);
-
- spin_lock(&dest->svc->stats.lock);
- dest->svc->stats.inpkts++;
- dest->svc->stats.inbytes += skb->len;
- spin_unlock(&dest->svc->stats.lock);
-
- spin_lock(&ip_vs_stats.lock);
- ip_vs_stats.inpkts++;
- ip_vs_stats.inbytes += skb->len;
- spin_unlock(&ip_vs_stats.lock);
- }
-}
-
-
-static inline void
-ip_vs_out_stats(struct ip_vs_conn *cp, struct sk_buff *skb)
-{
- struct ip_vs_dest *dest = cp->dest;
- if (dest && (dest->flags & IP_VS_DEST_F_AVAILABLE)) {
- spin_lock(&dest->stats.lock);
- dest->stats.outpkts++;
- dest->stats.outbytes += skb->len;
- spin_unlock(&dest->stats.lock);
-
- spin_lock(&dest->svc->stats.lock);
- dest->svc->stats.outpkts++;
- dest->svc->stats.outbytes += skb->len;
- spin_unlock(&dest->svc->stats.lock);
-
- spin_lock(&ip_vs_stats.lock);
- ip_vs_stats.outpkts++;
- ip_vs_stats.outbytes += skb->len;
- spin_unlock(&ip_vs_stats.lock);
- }
-}
-
-
-static inline void
-ip_vs_conn_stats(struct ip_vs_conn *cp, struct ip_vs_service *svc)
-{
- spin_lock(&cp->dest->stats.lock);
- cp->dest->stats.conns++;
- spin_unlock(&cp->dest->stats.lock);
-
- spin_lock(&svc->stats.lock);
- svc->stats.conns++;
- spin_unlock(&svc->stats.lock);
-
- spin_lock(&ip_vs_stats.lock);
- ip_vs_stats.conns++;
- spin_unlock(&ip_vs_stats.lock);
-}
-
-
-static inline int
-ip_vs_set_state(struct ip_vs_conn *cp, int direction,
- const struct sk_buff *skb,
- struct ip_vs_protocol *pp)
-{
- if (unlikely(!pp->state_transition))
- return 0;
- return pp->state_transition(cp, direction, skb, pp);
-}
-
-
-/*
- * IPVS persistent scheduling function
- * It creates a connection entry according to its template if exists,
- * or selects a server and creates a connection entry plus a template.
- * Locking: we are svc user (svc->refcnt), so we hold all dests too
- * Protocols supported: TCP, UDP
- */
-static struct ip_vs_conn *
-ip_vs_sched_persist(struct ip_vs_service *svc,
- const struct sk_buff *skb,
- __be16 ports[2])
-{
- struct ip_vs_conn *cp = NULL;
- struct iphdr *iph = ip_hdr(skb);
- struct ip_vs_dest *dest;
- struct ip_vs_conn *ct;
- __be16 dport; /* destination port to forward */
- __be32 snet; /* source network of the client, after masking */
-
- /* Mask saddr with the netmask to adjust template granularity */
- snet = iph->saddr & svc->netmask;
-
- IP_VS_DBG(6, "p-schedule: src %u.%u.%u.%u:%u dest %u.%u.%u.%u:%u "
- "mnet %u.%u.%u.%u\n",
- NIPQUAD(iph->saddr), ntohs(ports[0]),
- NIPQUAD(iph->daddr), ntohs(ports[1]),
- NIPQUAD(snet));
-
- /*
- * As far as we know, FTP is a very complicated network protocol, and
- * it uses control connection and data connections. For active FTP,
- * FTP server initialize data connection to the client, its source port
- * is often 20. For passive FTP, FTP server tells the clients the port
- * that it passively listens to, and the client issues the data
- * connection. In the tunneling or direct routing mode, the load
- * balancer is on the client-to-server half of connection, the port
- * number is unknown to the load balancer. So, a conn template like
- * <caddr, 0, vaddr, 0, daddr, 0> is created for persistent FTP
- * service, and a template like <caddr, 0, vaddr, vport, daddr, dport>
- * is created for other persistent services.
- */
- if (ports[1] == svc->port) {
- /* Check if a template already exists */
- if (svc->port != FTPPORT)
- ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
- iph->daddr, ports[1]);
- else
- ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
- iph->daddr, 0);
-
- if (!ct || !ip_vs_check_template(ct)) {
- /*
- * No template found or the dest of the connection
- * template is not available.
- */
- dest = svc->scheduler->schedule(svc, skb);
- if (dest == NULL) {
- IP_VS_DBG(1, "p-schedule: no dest found.\n");
- return NULL;
- }
-
- /*
- * Create a template like <protocol,caddr,0,
- * vaddr,vport,daddr,dport> for non-ftp service,
- * and <protocol,caddr,0,vaddr,0,daddr,0>
- * for ftp service.
- */
- if (svc->port != FTPPORT)
- ct = ip_vs_conn_new(iph->protocol,
- snet, 0,
- iph->daddr,
- ports[1],
- dest->addr, dest->port,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- else
- ct = ip_vs_conn_new(iph->protocol,
- snet, 0,
- iph->daddr, 0,
- dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- if (ct == NULL)
- return NULL;
-
- ct->timeout = svc->timeout;
- } else {
- /* set destination with the found template */
- dest = ct->dest;
- }
- dport = dest->port;
- } else {
- /*
- * Note: persistent fwmark-based services and persistent
- * port zero service are handled here.
- * fwmark template: <IPPROTO_IP,caddr,0,fwmark,0,daddr,0>
- * port zero template: <protocol,caddr,0,vaddr,0,daddr,0>
- */
- if (svc->fwmark)
- ct = ip_vs_ct_in_get(IPPROTO_IP, snet, 0,
- htonl(svc->fwmark), 0);
- else
- ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
- iph->daddr, 0);
-
- if (!ct || !ip_vs_check_template(ct)) {
- /*
- * If it is not persistent port zero, return NULL,
- * otherwise create a connection template.
- */
- if (svc->port)
- return NULL;
-
- dest = svc->scheduler->schedule(svc, skb);
- if (dest == NULL) {
- IP_VS_DBG(1, "p-schedule: no dest found.\n");
- return NULL;
- }
-
- /*
- * Create a template according to the service
- */
- if (svc->fwmark)
- ct = ip_vs_conn_new(IPPROTO_IP,
- snet, 0,
- htonl(svc->fwmark), 0,
- dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- else
- ct = ip_vs_conn_new(iph->protocol,
- snet, 0,
- iph->daddr, 0,
- dest->addr, 0,
- IP_VS_CONN_F_TEMPLATE,
- dest);
- if (ct == NULL)
- return NULL;
-
- ct->timeout = svc->timeout;
- } else {
- /* set destination with the found template */
- dest = ct->dest;
- }
- dport = ports[1];
- }
-
- /*
- * Create a new connection according to the template
- */
- cp = ip_vs_conn_new(iph->protocol,
- iph->saddr, ports[0],
- iph->daddr, ports[1],
- dest->addr, dport,
- 0,
- dest);
- if (cp == NULL) {
- ip_vs_conn_put(ct);
- return NULL;
- }
-
- /*
- * Add its control
- */
- ip_vs_control_add(cp, ct);
- ip_vs_conn_put(ct);
-
- ip_vs_conn_stats(cp, svc);
- return cp;
-}
-
-
-/*
- * IPVS main scheduling function
- * It selects a server according to the virtual service, and
- * creates a connection entry.
- * Protocols supported: TCP, UDP
- */
-struct ip_vs_conn *
-ip_vs_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_conn *cp = NULL;
- struct iphdr *iph = ip_hdr(skb);
- struct ip_vs_dest *dest;
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, iph->ihl*4,
- sizeof(_ports), _ports);
- if (pptr == NULL)
- return NULL;
-
- /*
- * Persistent service
- */
- if (svc->flags & IP_VS_SVC_F_PERSISTENT)
- return ip_vs_sched_persist(svc, skb, pptr);
-
- /*
- * Non-persistent service
- */
- if (!svc->fwmark && pptr[1] != svc->port) {
- if (!svc->port)
- IP_VS_ERR("Schedule: port zero only supported "
- "in persistent services, "
- "check your ipvs configuration\n");
- return NULL;
- }
-
- dest = svc->scheduler->schedule(svc, skb);
- if (dest == NULL) {
- IP_VS_DBG(1, "Schedule: no dest found.\n");
- return NULL;
- }
-
- /*
- * Create a connection entry.
- */
- cp = ip_vs_conn_new(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1],
- dest->addr, dest->port?dest->port:pptr[1],
- 0,
- dest);
- if (cp == NULL)
- return NULL;
-
- IP_VS_DBG(6, "Schedule fwd:%c c:%u.%u.%u.%u:%u v:%u.%u.%u.%u:%u "
- "d:%u.%u.%u.%u:%u conn->flags:%X conn->refcnt:%d\n",
- ip_vs_fwd_tag(cp),
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- NIPQUAD(cp->vaddr), ntohs(cp->vport),
- NIPQUAD(cp->daddr), ntohs(cp->dport),
- cp->flags, atomic_read(&cp->refcnt));
-
- ip_vs_conn_stats(cp, svc);
- return cp;
-}
-
-
-/*
- * Pass or drop the packet.
- * Called by ip_vs_in, when the virtual service is available but
- * no destination is available for a new connection.
- */
-int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
- struct ip_vs_protocol *pp)
-{
- __be16 _ports[2], *pptr;
- struct iphdr *iph = ip_hdr(skb);
-
- pptr = skb_header_pointer(skb, iph->ihl*4,
- sizeof(_ports), _ports);
- if (pptr == NULL) {
- ip_vs_service_put(svc);
- return NF_DROP;
- }
-
- /* if it is fwmark-based service, the cache_bypass sysctl is up
- and the destination is RTN_UNICAST (and not local), then create
- a cache_bypass connection entry */
- if (sysctl_ip_vs_cache_bypass && svc->fwmark
- && (inet_addr_type(&init_net, iph->daddr) == RTN_UNICAST)) {
- int ret, cs;
- struct ip_vs_conn *cp;
-
- ip_vs_service_put(svc);
-
- /* create a new connection entry */
- IP_VS_DBG(6, "ip_vs_leave: create a cache_bypass entry\n");
- cp = ip_vs_conn_new(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1],
- 0, 0,
- IP_VS_CONN_F_BYPASS,
- NULL);
- if (cp == NULL)
- return NF_DROP;
-
- /* statistics */
- ip_vs_in_stats(cp, skb);
-
- /* set state */
- cs = ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pp);
-
- /* transmit the first SYN packet */
- ret = cp->packet_xmit(skb, cp, pp);
- /* do not touch skb anymore */
-
- atomic_inc(&cp->in_pkts);
- ip_vs_conn_put(cp);
- return ret;
- }
-
- /*
- * When the virtual ftp service is presented, packets destined
- * for other services on the VIP may get here (except services
- * listed in the ipvs table), pass the packets, because it is
- * not ipvs job to decide to drop the packets.
- */
- if ((svc->port == FTPPORT) && (pptr[1] != FTPPORT)) {
- ip_vs_service_put(svc);
- return NF_ACCEPT;
- }
-
- ip_vs_service_put(svc);
-
- /*
- * Notify the client that the destination is unreachable, and
- * release the socket buffer.
- * Since it is in IP layer, the TCP socket is not actually
- * created, the TCP RST packet cannot be sent, instead that
- * ICMP_PORT_UNREACH is sent here no matter it is TCP/UDP. --WZ
- */
- icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
- return NF_DROP;
-}
-
-
-/*
- * It is hooked before NF_IP_PRI_NAT_SRC at the NF_INET_POST_ROUTING
- * chain, and is used for VS/NAT.
- * It detects packets for VS/NAT connections and sends the packets
- * immediately. This can avoid that iptable_nat mangles the packets
- * for VS/NAT.
- */
-static unsigned int ip_vs_post_routing(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- if (!skb->ipvs_property)
- return NF_ACCEPT;
- /* The packet was sent from IPVS, exit this chain */
- return NF_STOP;
-}
-
-__sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset)
-{
- return csum_fold(skb_checksum(skb, offset, skb->len - offset, 0));
-}
-
-static inline int ip_vs_gather_frags(struct sk_buff *skb, u_int32_t user)
-{
- int err = ip_defrag(skb, user);
-
- if (!err)
- ip_send_check(ip_hdr(skb));
-
- return err;
-}
-
-/*
- * Packet has been made sufficiently writable in caller
- * - inout: 1=in->out, 0=out->in
- */
-void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
- struct ip_vs_conn *cp, int inout)
-{
- struct iphdr *iph = ip_hdr(skb);
- unsigned int icmp_offset = iph->ihl*4;
- struct icmphdr *icmph = (struct icmphdr *)(skb_network_header(skb) +
- icmp_offset);
- struct iphdr *ciph = (struct iphdr *)(icmph + 1);
-
- if (inout) {
- iph->saddr = cp->vaddr;
- ip_send_check(iph);
- ciph->daddr = cp->vaddr;
- ip_send_check(ciph);
- } else {
- iph->daddr = cp->daddr;
- ip_send_check(iph);
- ciph->saddr = cp->daddr;
- ip_send_check(ciph);
- }
-
- /* the TCP/UDP port */
- if (IPPROTO_TCP == ciph->protocol || IPPROTO_UDP == ciph->protocol) {
- __be16 *ports = (void *)ciph + ciph->ihl*4;
-
- if (inout)
- ports[1] = cp->vport;
- else
- ports[0] = cp->dport;
- }
-
- /* And finally the ICMP checksum */
- icmph->checksum = 0;
- icmph->checksum = ip_vs_checksum_complete(skb, icmp_offset);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- if (inout)
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
- "Forwarding altered outgoing ICMP");
- else
- IP_VS_DBG_PKT(11, pp, skb, (void *)ciph - (void *)iph,
- "Forwarding altered incoming ICMP");
-}
-
-/*
- * Handle ICMP messages in the inside-to-outside direction (outgoing).
- * Find any that might be relevant, check against existing connections,
- * forward to the right destination host if relevant.
- * Currently handles error types - unreachable, quench, ttl exceeded.
- * (Only used in VS/NAT)
- */
-static int ip_vs_out_icmp(struct sk_buff *skb, int *related)
-{
- struct iphdr *iph;
- struct icmphdr _icmph, *ic;
- struct iphdr _ciph, *cih; /* The ip header contained within the ICMP */
- struct ip_vs_conn *cp;
- struct ip_vs_protocol *pp;
- unsigned int offset, ihl, verdict;
-
- *related = 1;
-
- /* reassemble IP fragments */
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
- if (ip_vs_gather_frags(skb, IP_DEFRAG_VS_OUT))
- return NF_STOLEN;
- }
-
- iph = ip_hdr(skb);
- offset = ihl = iph->ihl * 4;
- ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph);
- if (ic == NULL)
- return NF_DROP;
-
- IP_VS_DBG(12, "Outgoing ICMP (%d,%d) %u.%u.%u.%u->%u.%u.%u.%u\n",
- ic->type, ntohs(icmp_id(ic)),
- NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
-
- /*
- * Work through seeing if this is for us.
- * These checks are supposed to be in an order that means easy
- * things are checked first to speed up processing.... however
- * this means that some packets will manage to get a long way
- * down this stack and then be rejected, but that's life.
- */
- if ((ic->type != ICMP_DEST_UNREACH) &&
- (ic->type != ICMP_SOURCE_QUENCH) &&
- (ic->type != ICMP_TIME_EXCEEDED)) {
- *related = 0;
- return NF_ACCEPT;
- }
-
- /* Now find the contained IP header */
- offset += sizeof(_icmph);
- cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (cih == NULL)
- return NF_ACCEPT; /* The packet looks wrong, ignore */
-
- pp = ip_vs_proto_get(cih->protocol);
- if (!pp)
- return NF_ACCEPT;
-
- /* Is the embedded protocol header present? */
- if (unlikely(cih->frag_off & htons(IP_OFFSET) &&
- pp->dont_defrag))
- return NF_ACCEPT;
-
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking outgoing ICMP for");
-
- offset += cih->ihl * 4;
-
- /* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_out_get(skb, pp, cih, offset, 1);
- if (!cp)
- return NF_ACCEPT;
-
- verdict = NF_DROP;
-
- if (IP_VS_FWD_METHOD(cp) != 0) {
- IP_VS_ERR("shouldn't reach here, because the box is on the "
- "half connection in the tun/dr module.\n");
- }
-
- /* Ensure the checksum is correct */
- if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) {
- /* Failed checksum! */
- IP_VS_DBG(1, "Forward ICMP: failed checksum from %d.%d.%d.%d!\n",
- NIPQUAD(iph->saddr));
- goto out;
- }
-
- if (IPPROTO_TCP == cih->protocol || IPPROTO_UDP == cih->protocol)
- offset += 2 * sizeof(__u16);
- if (!skb_make_writable(skb, offset))
- goto out;
-
- ip_vs_nat_icmp(skb, pp, cp, 1);
-
- /* do the statistics and put it back */
- ip_vs_out_stats(cp, skb);
-
- skb->ipvs_property = 1;
- verdict = NF_ACCEPT;
-
- out:
- __ip_vs_conn_put(cp);
-
- return verdict;
-}
-
-static inline int is_tcp_reset(const struct sk_buff *skb)
-{
- struct tcphdr _tcph, *th;
-
- th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph);
- if (th == NULL)
- return 0;
- return th->rst;
-}
-
-/*
- * It is hooked at the NF_INET_FORWARD chain, used only for VS/NAT.
- * Check if outgoing packet belongs to the established ip_vs_conn,
- * rewrite addresses of the packet and send it on its way...
- */
-static unsigned int
-ip_vs_out(unsigned int hooknum, struct sk_buff *skb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- struct iphdr *iph;
- struct ip_vs_protocol *pp;
- struct ip_vs_conn *cp;
- int ihl;
-
- EnterFunction(11);
-
- if (skb->ipvs_property)
- return NF_ACCEPT;
-
- iph = ip_hdr(skb);
- if (unlikely(iph->protocol == IPPROTO_ICMP)) {
- int related, verdict = ip_vs_out_icmp(skb, &related);
-
- if (related)
- return verdict;
- iph = ip_hdr(skb);
- }
-
- pp = ip_vs_proto_get(iph->protocol);
- if (unlikely(!pp))
- return NF_ACCEPT;
-
- /* reassemble IP fragments */
- if (unlikely(iph->frag_off & htons(IP_MF|IP_OFFSET) &&
- !pp->dont_defrag)) {
- if (ip_vs_gather_frags(skb, IP_DEFRAG_VS_OUT))
- return NF_STOLEN;
- iph = ip_hdr(skb);
- }
-
- ihl = iph->ihl << 2;
-
- /*
- * Check if the packet belongs to an existing entry
- */
- cp = pp->conn_out_get(skb, pp, iph, ihl, 0);
-
- if (unlikely(!cp)) {
- if (sysctl_ip_vs_nat_icmp_send &&
- (pp->protocol == IPPROTO_TCP ||
- pp->protocol == IPPROTO_UDP)) {
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, ihl,
- sizeof(_ports), _ports);
- if (pptr == NULL)
- return NF_ACCEPT; /* Not for me */
- if (ip_vs_lookup_real_service(iph->protocol,
- iph->saddr, pptr[0])) {
- /*
- * Notify the real server: there is no
- * existing entry if it is not RST
- * packet or not TCP packet.
- */
- if (iph->protocol != IPPROTO_TCP
- || !is_tcp_reset(skb)) {
- icmp_send(skb,ICMP_DEST_UNREACH,
- ICMP_PORT_UNREACH, 0);
- return NF_DROP;
- }
- }
- }
- IP_VS_DBG_PKT(12, pp, skb, 0,
- "packet continues traversal as normal");
- return NF_ACCEPT;
- }
-
- IP_VS_DBG_PKT(11, pp, skb, 0, "Outgoing packet");
-
- if (!skb_make_writable(skb, ihl))
- goto drop;
-
- /* mangle the packet */
- if (pp->snat_handler && !pp->snat_handler(skb, pp, cp))
- goto drop;
- ip_hdr(skb)->saddr = cp->vaddr;
- ip_send_check(ip_hdr(skb));
-
- /* For policy routing, packets originating from this
- * machine itself may be routed differently to packets
- * passing through. We want this packet to be routed as
- * if it came from this machine itself. So re-compute
- * the routing information.
- */
- if (ip_route_me_harder(skb, RTN_LOCAL) != 0)
- goto drop;
-
- IP_VS_DBG_PKT(10, pp, skb, 0, "After SNAT");
-
- ip_vs_out_stats(cp, skb);
- ip_vs_set_state(cp, IP_VS_DIR_OUTPUT, skb, pp);
- ip_vs_conn_put(cp);
-
- skb->ipvs_property = 1;
-
- LeaveFunction(11);
- return NF_ACCEPT;
-
- drop:
- ip_vs_conn_put(cp);
- kfree_skb(skb);
- return NF_STOLEN;
-}
-
-
-/*
- * Handle ICMP messages in the outside-to-inside direction (incoming).
- * Find any that might be relevant, check against existing connections,
- * forward to the right destination host if relevant.
- * Currently handles error types - unreachable, quench, ttl exceeded.
- */
-static int
-ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum)
-{
- struct iphdr *iph;
- struct icmphdr _icmph, *ic;
- struct iphdr _ciph, *cih; /* The ip header contained within the ICMP */
- struct ip_vs_conn *cp;
- struct ip_vs_protocol *pp;
- unsigned int offset, ihl, verdict;
-
- *related = 1;
-
- /* reassemble IP fragments */
- if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
- if (ip_vs_gather_frags(skb, hooknum == NF_INET_LOCAL_IN ?
- IP_DEFRAG_VS_IN : IP_DEFRAG_VS_FWD))
- return NF_STOLEN;
- }
-
- iph = ip_hdr(skb);
- offset = ihl = iph->ihl * 4;
- ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph);
- if (ic == NULL)
- return NF_DROP;
-
- IP_VS_DBG(12, "Incoming ICMP (%d,%d) %u.%u.%u.%u->%u.%u.%u.%u\n",
- ic->type, ntohs(icmp_id(ic)),
- NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
-
- /*
- * Work through seeing if this is for us.
- * These checks are supposed to be in an order that means easy
- * things are checked first to speed up processing.... however
- * this means that some packets will manage to get a long way
- * down this stack and then be rejected, but that's life.
- */
- if ((ic->type != ICMP_DEST_UNREACH) &&
- (ic->type != ICMP_SOURCE_QUENCH) &&
- (ic->type != ICMP_TIME_EXCEEDED)) {
- *related = 0;
- return NF_ACCEPT;
- }
-
- /* Now find the contained IP header */
- offset += sizeof(_icmph);
- cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (cih == NULL)
- return NF_ACCEPT; /* The packet looks wrong, ignore */
-
- pp = ip_vs_proto_get(cih->protocol);
- if (!pp)
- return NF_ACCEPT;
-
- /* Is the embedded protocol header present? */
- if (unlikely(cih->frag_off & htons(IP_OFFSET) &&
- pp->dont_defrag))
- return NF_ACCEPT;
-
- IP_VS_DBG_PKT(11, pp, skb, offset, "Checking incoming ICMP for");
-
- offset += cih->ihl * 4;
-
- /* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_in_get(skb, pp, cih, offset, 1);
- if (!cp)
- return NF_ACCEPT;
-
- verdict = NF_DROP;
-
- /* Ensure the checksum is correct */
- if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) {
- /* Failed checksum! */
- IP_VS_DBG(1, "Incoming ICMP: failed checksum from %d.%d.%d.%d!\n",
- NIPQUAD(iph->saddr));
- goto out;
- }
-
- /* do the statistics and put it back */
- ip_vs_in_stats(cp, skb);
- if (IPPROTO_TCP == cih->protocol || IPPROTO_UDP == cih->protocol)
- offset += 2 * sizeof(__u16);
- verdict = ip_vs_icmp_xmit(skb, cp, pp, offset);
- /* do not touch skb anymore */
-
- out:
- __ip_vs_conn_put(cp);
-
- return verdict;
-}
-
-/*
- * Check if it's for virtual services, look it up,
- * and send it on its way...
- */
-static unsigned int
-ip_vs_in(unsigned int hooknum, struct sk_buff *skb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- struct iphdr *iph;
- struct ip_vs_protocol *pp;
- struct ip_vs_conn *cp;
- int ret, restart;
- int ihl;
-
- /*
- * Big tappo: only PACKET_HOST (neither loopback nor mcasts)
- * ... don't know why 1st test DOES NOT include 2nd (?)
- */
- if (unlikely(skb->pkt_type != PACKET_HOST
- || skb->dev->flags & IFF_LOOPBACK || skb->sk)) {
- IP_VS_DBG(12, "packet type=%d proto=%d daddr=%d.%d.%d.%d ignored\n",
- skb->pkt_type,
- ip_hdr(skb)->protocol,
- NIPQUAD(ip_hdr(skb)->daddr));
- return NF_ACCEPT;
- }
-
- iph = ip_hdr(skb);
- if (unlikely(iph->protocol == IPPROTO_ICMP)) {
- int related, verdict = ip_vs_in_icmp(skb, &related, hooknum);
-
- if (related)
- return verdict;
- iph = ip_hdr(skb);
- }
-
- /* Protocol supported? */
- pp = ip_vs_proto_get(iph->protocol);
- if (unlikely(!pp))
- return NF_ACCEPT;
-
- ihl = iph->ihl << 2;
-
- /*
- * Check if the packet belongs to an existing connection entry
- */
- cp = pp->conn_in_get(skb, pp, iph, ihl, 0);
-
- if (unlikely(!cp)) {
- int v;
-
- if (!pp->conn_schedule(skb, pp, &v, &cp))
- return v;
- }
-
- if (unlikely(!cp)) {
- /* sorry, all this trouble for a no-hit :) */
- IP_VS_DBG_PKT(12, pp, skb, 0,
- "packet continues traversal as normal");
- return NF_ACCEPT;
- }
-
- IP_VS_DBG_PKT(11, pp, skb, 0, "Incoming packet");
-
- /* Check the server status */
- if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) {
- /* the destination server is not available */
-
- if (sysctl_ip_vs_expire_nodest_conn) {
- /* try to expire the connection immediately */
- ip_vs_conn_expire_now(cp);
- }
- /* don't restart its timer, and silently
- drop the packet. */
- __ip_vs_conn_put(cp);
- return NF_DROP;
- }
-
- ip_vs_in_stats(cp, skb);
- restart = ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pp);
- if (cp->packet_xmit)
- ret = cp->packet_xmit(skb, cp, pp);
- /* do not touch skb anymore */
- else {
- IP_VS_DBG_RL("warning: packet_xmit is null");
- ret = NF_ACCEPT;
- }
-
- /* Increase its packet counter and check if it is needed
- * to be synchronized
- *
- * Sync connection if it is about to close to
- * encorage the standby servers to update the connections timeout
- */
- atomic_inc(&cp->in_pkts);
- if ((ip_vs_sync_state & IP_VS_STATE_MASTER) &&
- (((cp->protocol != IPPROTO_TCP ||
- cp->state == IP_VS_TCP_S_ESTABLISHED) &&
- (atomic_read(&cp->in_pkts) % sysctl_ip_vs_sync_threshold[1]
- == sysctl_ip_vs_sync_threshold[0])) ||
- ((cp->protocol == IPPROTO_TCP) && (cp->old_state != cp->state) &&
- ((cp->state == IP_VS_TCP_S_FIN_WAIT) ||
- (cp->state == IP_VS_TCP_S_CLOSE_WAIT) ||
- (cp->state == IP_VS_TCP_S_TIME_WAIT)))))
- ip_vs_sync_conn(cp);
- cp->old_state = cp->state;
-
- ip_vs_conn_put(cp);
- return ret;
-}
-
-
-/*
- * It is hooked at the NF_INET_FORWARD chain, in order to catch ICMP
- * related packets destined for 0.0.0.0/0.
- * When fwmark-based virtual service is used, such as transparent
- * cache cluster, TCP packets can be marked and routed to ip_vs_in,
- * but ICMP destined for 0.0.0.0/0 cannot not be easily marked and
- * sent to ip_vs_in_icmp. So, catch them at the NF_INET_FORWARD chain
- * and send them to ip_vs_in_icmp.
- */
-static unsigned int
-ip_vs_forward_icmp(unsigned int hooknum, struct sk_buff *skb,
- const struct net_device *in, const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- int r;
-
- if (ip_hdr(skb)->protocol != IPPROTO_ICMP)
- return NF_ACCEPT;
-
- return ip_vs_in_icmp(skb, &r, hooknum);
-}
-
-
-static struct nf_hook_ops ip_vs_ops[] __read_mostly = {
- /* After packet filtering, forward packet through VS/DR, VS/TUN,
- * or VS/NAT(change destination), so that filtering rules can be
- * applied to IPVS. */
- {
- .hook = ip_vs_in,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_INET_LOCAL_IN,
- .priority = 100,
- },
- /* After packet filtering, change source only for VS/NAT */
- {
- .hook = ip_vs_out,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_INET_FORWARD,
- .priority = 100,
- },
- /* After packet filtering (but before ip_vs_out_icmp), catch icmp
- * destined for 0.0.0.0/0, which is for incoming IPVS connections */
- {
- .hook = ip_vs_forward_icmp,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_INET_FORWARD,
- .priority = 99,
- },
- /* Before the netfilter connection tracking, exit from POST_ROUTING */
- {
- .hook = ip_vs_post_routing,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_INET_POST_ROUTING,
- .priority = NF_IP_PRI_NAT_SRC-1,
- },
-};
-
-
-/*
- * Initialize IP Virtual Server
- */
-static int __init ip_vs_init(void)
-{
- int ret;
-
- ret = ip_vs_control_init();
- if (ret < 0) {
- IP_VS_ERR("can't setup control.\n");
- goto cleanup_nothing;
- }
-
- ip_vs_protocol_init();
-
- ret = ip_vs_app_init();
- if (ret < 0) {
- IP_VS_ERR("can't setup application helper.\n");
- goto cleanup_protocol;
- }
-
- ret = ip_vs_conn_init();
- if (ret < 0) {
- IP_VS_ERR("can't setup connection table.\n");
- goto cleanup_app;
- }
-
- ret = nf_register_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
- if (ret < 0) {
- IP_VS_ERR("can't register hooks.\n");
- goto cleanup_conn;
- }
-
- IP_VS_INFO("ipvs loaded.\n");
- return ret;
-
- cleanup_conn:
- ip_vs_conn_cleanup();
- cleanup_app:
- ip_vs_app_cleanup();
- cleanup_protocol:
- ip_vs_protocol_cleanup();
- ip_vs_control_cleanup();
- cleanup_nothing:
- return ret;
-}
-
-static void __exit ip_vs_cleanup(void)
-{
- nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
- ip_vs_conn_cleanup();
- ip_vs_app_cleanup();
- ip_vs_protocol_cleanup();
- ip_vs_control_cleanup();
- IP_VS_INFO("ipvs unloaded.\n");
-}
-
-module_init(ip_vs_init);
-module_exit(ip_vs_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
deleted file mode 100644
index 6379705a8dc..00000000000
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ /dev/null
@@ -1,2373 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the NetFilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/capability.h>
-#include <linux/fs.h>
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
-#include <linux/workqueue.h>
-#include <linux/swap.h>
-#include <linux/seq_file.h>
-
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/mutex.h>
-
-#include <net/net_namespace.h>
-#include <net/ip.h>
-#include <net/route.h>
-#include <net/sock.h>
-
-#include <asm/uaccess.h>
-
-#include <net/ip_vs.h>
-
-/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
-static DEFINE_MUTEX(__ip_vs_mutex);
-
-/* lock for service table */
-static DEFINE_RWLOCK(__ip_vs_svc_lock);
-
-/* lock for table with the real services */
-static DEFINE_RWLOCK(__ip_vs_rs_lock);
-
-/* lock for state and timeout tables */
-static DEFINE_RWLOCK(__ip_vs_securetcp_lock);
-
-/* lock for drop entry handling */
-static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
-
-/* lock for drop packet handling */
-static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
-
-/* 1/rate drop and drop-entry variables */
-int ip_vs_drop_rate = 0;
-int ip_vs_drop_counter = 0;
-static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
-
-/* number of virtual services */
-static int ip_vs_num_services = 0;
-
-/* sysctl variables */
-static int sysctl_ip_vs_drop_entry = 0;
-static int sysctl_ip_vs_drop_packet = 0;
-static int sysctl_ip_vs_secure_tcp = 0;
-static int sysctl_ip_vs_amemthresh = 1024;
-static int sysctl_ip_vs_am_droprate = 10;
-int sysctl_ip_vs_cache_bypass = 0;
-int sysctl_ip_vs_expire_nodest_conn = 0;
-int sysctl_ip_vs_expire_quiescent_template = 0;
-int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
-int sysctl_ip_vs_nat_icmp_send = 0;
-
-
-#ifdef CONFIG_IP_VS_DEBUG
-static int sysctl_ip_vs_debug_level = 0;
-
-int ip_vs_get_debug_level(void)
-{
- return sysctl_ip_vs_debug_level;
-}
-#endif
-
-/*
- * update_defense_level is called from keventd and from sysctl,
- * so it needs to protect itself from softirqs
- */
-static void update_defense_level(void)
-{
- struct sysinfo i;
- static int old_secure_tcp = 0;
- int availmem;
- int nomem;
- int to_change = -1;
-
- /* we only count free and buffered memory (in pages) */
- si_meminfo(&i);
- availmem = i.freeram + i.bufferram;
- /* however in linux 2.5 the i.bufferram is total page cache size,
- we need adjust it */
- /* si_swapinfo(&i); */
- /* availmem = availmem - (i.totalswap - i.freeswap); */
-
- nomem = (availmem < sysctl_ip_vs_amemthresh);
-
- local_bh_disable();
-
- /* drop_entry */
- spin_lock(&__ip_vs_dropentry_lock);
- switch (sysctl_ip_vs_drop_entry) {
- case 0:
- atomic_set(&ip_vs_dropentry, 0);
- break;
- case 1:
- if (nomem) {
- atomic_set(&ip_vs_dropentry, 1);
- sysctl_ip_vs_drop_entry = 2;
- } else {
- atomic_set(&ip_vs_dropentry, 0);
- }
- break;
- case 2:
- if (nomem) {
- atomic_set(&ip_vs_dropentry, 1);
- } else {
- atomic_set(&ip_vs_dropentry, 0);
- sysctl_ip_vs_drop_entry = 1;
- };
- break;
- case 3:
- atomic_set(&ip_vs_dropentry, 1);
- break;
- }
- spin_unlock(&__ip_vs_dropentry_lock);
-
- /* drop_packet */
- spin_lock(&__ip_vs_droppacket_lock);
- switch (sysctl_ip_vs_drop_packet) {
- case 0:
- ip_vs_drop_rate = 0;
- break;
- case 1:
- if (nomem) {
- ip_vs_drop_rate = ip_vs_drop_counter
- = sysctl_ip_vs_amemthresh /
- (sysctl_ip_vs_amemthresh-availmem);
- sysctl_ip_vs_drop_packet = 2;
- } else {
- ip_vs_drop_rate = 0;
- }
- break;
- case 2:
- if (nomem) {
- ip_vs_drop_rate = ip_vs_drop_counter
- = sysctl_ip_vs_amemthresh /
- (sysctl_ip_vs_amemthresh-availmem);
- } else {
- ip_vs_drop_rate = 0;
- sysctl_ip_vs_drop_packet = 1;
- }
- break;
- case 3:
- ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
- break;
- }
- spin_unlock(&__ip_vs_droppacket_lock);
-
- /* secure_tcp */
- write_lock(&__ip_vs_securetcp_lock);
- switch (sysctl_ip_vs_secure_tcp) {
- case 0:
- if (old_secure_tcp >= 2)
- to_change = 0;
- break;
- case 1:
- if (nomem) {
- if (old_secure_tcp < 2)
- to_change = 1;
- sysctl_ip_vs_secure_tcp = 2;
- } else {
- if (old_secure_tcp >= 2)
- to_change = 0;
- }
- break;
- case 2:
- if (nomem) {
- if (old_secure_tcp < 2)
- to_change = 1;
- } else {
- if (old_secure_tcp >= 2)
- to_change = 0;
- sysctl_ip_vs_secure_tcp = 1;
- }
- break;
- case 3:
- if (old_secure_tcp < 2)
- to_change = 1;
- break;
- }
- old_secure_tcp = sysctl_ip_vs_secure_tcp;
- if (to_change >= 0)
- ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
- write_unlock(&__ip_vs_securetcp_lock);
-
- local_bh_enable();
-}
-
-
-/*
- * Timer for checking the defense
- */
-#define DEFENSE_TIMER_PERIOD 1*HZ
-static void defense_work_handler(struct work_struct *work);
-static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
-
-static void defense_work_handler(struct work_struct *work)
-{
- update_defense_level();
- if (atomic_read(&ip_vs_dropentry))
- ip_vs_random_dropentry();
-
- schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
-}
-
-int
-ip_vs_use_count_inc(void)
-{
- return try_module_get(THIS_MODULE);
-}
-
-void
-ip_vs_use_count_dec(void)
-{
- module_put(THIS_MODULE);
-}
-
-
-/*
- * Hash table: for virtual service lookups
- */
-#define IP_VS_SVC_TAB_BITS 8
-#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
-#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
-
-/* the service table hashed by <protocol, addr, port> */
-static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
-/* the service table hashed by fwmark */
-static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
-
-/*
- * Hash table: for real service lookups
- */
-#define IP_VS_RTAB_BITS 4
-#define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
-#define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
-
-static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
-
-/*
- * Trash for destinations
- */
-static LIST_HEAD(ip_vs_dest_trash);
-
-/*
- * FTP & NULL virtual service counters
- */
-static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
-static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
-
-
-/*
- * Returns hash value for virtual service
- */
-static __inline__ unsigned
-ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port)
-{
- register unsigned porth = ntohs(port);
-
- return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
- & IP_VS_SVC_TAB_MASK;
-}
-
-/*
- * Returns hash value of fwmark for virtual service lookup
- */
-static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
-{
- return fwmark & IP_VS_SVC_TAB_MASK;
-}
-
-/*
- * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
- * or in the ip_vs_svc_fwm_table by fwmark.
- * Should be called with locked tables.
- */
-static int ip_vs_svc_hash(struct ip_vs_service *svc)
-{
- unsigned hash;
-
- if (svc->flags & IP_VS_SVC_F_HASHED) {
- IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- if (svc->fwmark == 0) {
- /*
- * Hash it by <protocol,addr,port> in ip_vs_svc_table
- */
- hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port);
- list_add(&svc->s_list, &ip_vs_svc_table[hash]);
- } else {
- /*
- * Hash it by fwmark in ip_vs_svc_fwm_table
- */
- hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
- list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
- }
-
- svc->flags |= IP_VS_SVC_F_HASHED;
- /* increase its refcnt because it is referenced by the svc table */
- atomic_inc(&svc->refcnt);
- return 1;
-}
-
-
-/*
- * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
- * Should be called with locked tables.
- */
-static int ip_vs_svc_unhash(struct ip_vs_service *svc)
-{
- if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
- IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- if (svc->fwmark == 0) {
- /* Remove it from the ip_vs_svc_table table */
- list_del(&svc->s_list);
- } else {
- /* Remove it from the ip_vs_svc_fwm_table table */
- list_del(&svc->f_list);
- }
-
- svc->flags &= ~IP_VS_SVC_F_HASHED;
- atomic_dec(&svc->refcnt);
- return 1;
-}
-
-
-/*
- * Get service by {proto,addr,port} in the service table.
- */
-static __inline__ struct ip_vs_service *
-__ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport)
-{
- unsigned hash;
- struct ip_vs_service *svc;
-
- /* Check for "full" addressed entries */
- hash = ip_vs_svc_hashkey(protocol, vaddr, vport);
-
- list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
- if ((svc->addr == vaddr)
- && (svc->port == vport)
- && (svc->protocol == protocol)) {
- /* HIT */
- atomic_inc(&svc->usecnt);
- return svc;
- }
- }
-
- return NULL;
-}
-
-
-/*
- * Get service by {fwmark} in the service table.
- */
-static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
-{
- unsigned hash;
- struct ip_vs_service *svc;
-
- /* Check for fwmark addressed entries */
- hash = ip_vs_svc_fwm_hashkey(fwmark);
-
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
- if (svc->fwmark == fwmark) {
- /* HIT */
- atomic_inc(&svc->usecnt);
- return svc;
- }
- }
-
- return NULL;
-}
-
-struct ip_vs_service *
-ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
-{
- struct ip_vs_service *svc;
-
- read_lock(&__ip_vs_svc_lock);
-
- /*
- * Check the table hashed by fwmark first
- */
- if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark)))
- goto out;
-
- /*
- * Check the table hashed by <protocol,addr,port>
- * for "full" addressed entries
- */
- svc = __ip_vs_service_get(protocol, vaddr, vport);
-
- if (svc == NULL
- && protocol == IPPROTO_TCP
- && atomic_read(&ip_vs_ftpsvc_counter)
- && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
- /*
- * Check if ftp service entry exists, the packet
- * might belong to FTP data connections.
- */
- svc = __ip_vs_service_get(protocol, vaddr, FTPPORT);
- }
-
- if (svc == NULL
- && atomic_read(&ip_vs_nullsvc_counter)) {
- /*
- * Check if the catch-all port (port zero) exists
- */
- svc = __ip_vs_service_get(protocol, vaddr, 0);
- }
-
- out:
- read_unlock(&__ip_vs_svc_lock);
-
- IP_VS_DBG(9, "lookup service: fwm %u %s %u.%u.%u.%u:%u %s\n",
- fwmark, ip_vs_proto_name(protocol),
- NIPQUAD(vaddr), ntohs(vport),
- svc?"hit":"not hit");
-
- return svc;
-}
-
-
-static inline void
-__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
-{
- atomic_inc(&svc->refcnt);
- dest->svc = svc;
-}
-
-static inline void
-__ip_vs_unbind_svc(struct ip_vs_dest *dest)
-{
- struct ip_vs_service *svc = dest->svc;
-
- dest->svc = NULL;
- if (atomic_dec_and_test(&svc->refcnt))
- kfree(svc);
-}
-
-
-/*
- * Returns hash value for real service
- */
-static __inline__ unsigned ip_vs_rs_hashkey(__be32 addr, __be16 port)
-{
- register unsigned porth = ntohs(port);
-
- return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth)
- & IP_VS_RTAB_MASK;
-}
-
-/*
- * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
- * should be called with locked tables.
- */
-static int ip_vs_rs_hash(struct ip_vs_dest *dest)
-{
- unsigned hash;
-
- if (!list_empty(&dest->d_list)) {
- return 0;
- }
-
- /*
- * Hash by proto,addr,port,
- * which are the parameters of the real service.
- */
- hash = ip_vs_rs_hashkey(dest->addr, dest->port);
- list_add(&dest->d_list, &ip_vs_rtable[hash]);
-
- return 1;
-}
-
-/*
- * UNhashes ip_vs_dest from ip_vs_rtable.
- * should be called with locked tables.
- */
-static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
-{
- /*
- * Remove it from the ip_vs_rtable table.
- */
- if (!list_empty(&dest->d_list)) {
- list_del(&dest->d_list);
- INIT_LIST_HEAD(&dest->d_list);
- }
-
- return 1;
-}
-
-/*
- * Lookup real service by <proto,addr,port> in the real service table.
- */
-struct ip_vs_dest *
-ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport)
-{
- unsigned hash;
- struct ip_vs_dest *dest;
-
- /*
- * Check for "full" addressed entries
- * Return the first found entry
- */
- hash = ip_vs_rs_hashkey(daddr, dport);
-
- read_lock(&__ip_vs_rs_lock);
- list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
- if ((dest->addr == daddr)
- && (dest->port == dport)
- && ((dest->protocol == protocol) ||
- dest->vfwmark)) {
- /* HIT */
- read_unlock(&__ip_vs_rs_lock);
- return dest;
- }
- }
- read_unlock(&__ip_vs_rs_lock);
-
- return NULL;
-}
-
-/*
- * Lookup destination by {addr,port} in the given service
- */
-static struct ip_vs_dest *
-ip_vs_lookup_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport)
-{
- struct ip_vs_dest *dest;
-
- /*
- * Find the destination for the given service
- */
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if ((dest->addr == daddr) && (dest->port == dport)) {
- /* HIT */
- return dest;
- }
- }
-
- return NULL;
-}
-
-/*
- * Find destination by {daddr,dport,vaddr,protocol}
- * Cretaed to be used in ip_vs_process_message() in
- * the backup synchronization daemon. It finds the
- * destination to be bound to the received connection
- * on the backup.
- *
- * ip_vs_lookup_real_service() looked promissing, but
- * seems not working as expected.
- */
-struct ip_vs_dest *ip_vs_find_dest(__be32 daddr, __be16 dport,
- __be32 vaddr, __be16 vport, __u16 protocol)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_service *svc;
-
- svc = ip_vs_service_get(0, protocol, vaddr, vport);
- if (!svc)
- return NULL;
- dest = ip_vs_lookup_dest(svc, daddr, dport);
- if (dest)
- atomic_inc(&dest->refcnt);
- ip_vs_service_put(svc);
- return dest;
-}
-
-/*
- * Lookup dest by {svc,addr,port} in the destination trash.
- * The destination trash is used to hold the destinations that are removed
- * from the service table but are still referenced by some conn entries.
- * The reason to add the destination trash is when the dest is temporary
- * down (either by administrator or by monitor program), the dest can be
- * picked back from the trash, the remaining connections to the dest can
- * continue, and the counting information of the dest is also useful for
- * scheduling.
- */
-static struct ip_vs_dest *
-ip_vs_trash_get_dest(struct ip_vs_service *svc, __be32 daddr, __be16 dport)
-{
- struct ip_vs_dest *dest, *nxt;
-
- /*
- * Find the destination in trash
- */
- list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
- IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, "
- "dest->refcnt=%d\n",
- dest->vfwmark,
- NIPQUAD(dest->addr), ntohs(dest->port),
- atomic_read(&dest->refcnt));
- if (dest->addr == daddr &&
- dest->port == dport &&
- dest->vfwmark == svc->fwmark &&
- dest->protocol == svc->protocol &&
- (svc->fwmark ||
- (dest->vaddr == svc->addr &&
- dest->vport == svc->port))) {
- /* HIT */
- return dest;
- }
-
- /*
- * Try to purge the destination from trash if not referenced
- */
- if (atomic_read(&dest->refcnt) == 1) {
- IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u "
- "from trash\n",
- dest->vfwmark,
- NIPQUAD(dest->addr), ntohs(dest->port));
- list_del(&dest->n_list);
- ip_vs_dst_reset(dest);
- __ip_vs_unbind_svc(dest);
- kfree(dest);
- }
- }
-
- return NULL;
-}
-
-
-/*
- * Clean up all the destinations in the trash
- * Called by the ip_vs_control_cleanup()
- *
- * When the ip_vs_control_clearup is activated by ipvs module exit,
- * the service tables must have been flushed and all the connections
- * are expired, and the refcnt of each destination in the trash must
- * be 1, so we simply release them here.
- */
-static void ip_vs_trash_cleanup(void)
-{
- struct ip_vs_dest *dest, *nxt;
-
- list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
- list_del(&dest->n_list);
- ip_vs_dst_reset(dest);
- __ip_vs_unbind_svc(dest);
- kfree(dest);
- }
-}
-
-
-static void
-ip_vs_zero_stats(struct ip_vs_stats *stats)
-{
- spin_lock_bh(&stats->lock);
-
- stats->conns = 0;
- stats->inpkts = 0;
- stats->outpkts = 0;
- stats->inbytes = 0;
- stats->outbytes = 0;
-
- stats->cps = 0;
- stats->inpps = 0;
- stats->outpps = 0;
- stats->inbps = 0;
- stats->outbps = 0;
-
- ip_vs_zero_estimator(stats);
-
- spin_unlock_bh(&stats->lock);
-}
-
-/*
- * Update a destination in the given service
- */
-static void
-__ip_vs_update_dest(struct ip_vs_service *svc,
- struct ip_vs_dest *dest, struct ip_vs_dest_user *udest)
-{
- int conn_flags;
-
- /* set the weight and the flags */
- atomic_set(&dest->weight, udest->weight);
- conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
-
- /* check if local node and update the flags */
- if (inet_addr_type(&init_net, udest->addr) == RTN_LOCAL) {
- conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
- | IP_VS_CONN_F_LOCALNODE;
- }
-
- /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
- if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
- conn_flags |= IP_VS_CONN_F_NOOUTPUT;
- } else {
- /*
- * Put the real service in ip_vs_rtable if not present.
- * For now only for NAT!
- */
- write_lock_bh(&__ip_vs_rs_lock);
- ip_vs_rs_hash(dest);
- write_unlock_bh(&__ip_vs_rs_lock);
- }
- atomic_set(&dest->conn_flags, conn_flags);
-
- /* bind the service */
- if (!dest->svc) {
- __ip_vs_bind_svc(dest, svc);
- } else {
- if (dest->svc != svc) {
- __ip_vs_unbind_svc(dest);
- ip_vs_zero_stats(&dest->stats);
- __ip_vs_bind_svc(dest, svc);
- }
- }
-
- /* set the dest status flags */
- dest->flags |= IP_VS_DEST_F_AVAILABLE;
-
- if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- dest->u_threshold = udest->u_threshold;
- dest->l_threshold = udest->l_threshold;
-}
-
-
-/*
- * Create a destination for the given service
- */
-static int
-ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest,
- struct ip_vs_dest **dest_p)
-{
- struct ip_vs_dest *dest;
- unsigned atype;
-
- EnterFunction(2);
-
- atype = inet_addr_type(&init_net, udest->addr);
- if (atype != RTN_LOCAL && atype != RTN_UNICAST)
- return -EINVAL;
-
- dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC);
- if (dest == NULL) {
- IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n");
- return -ENOMEM;
- }
-
- dest->protocol = svc->protocol;
- dest->vaddr = svc->addr;
- dest->vport = svc->port;
- dest->vfwmark = svc->fwmark;
- dest->addr = udest->addr;
- dest->port = udest->port;
-
- atomic_set(&dest->activeconns, 0);
- atomic_set(&dest->inactconns, 0);
- atomic_set(&dest->persistconns, 0);
- atomic_set(&dest->refcnt, 0);
-
- INIT_LIST_HEAD(&dest->d_list);
- spin_lock_init(&dest->dst_lock);
- spin_lock_init(&dest->stats.lock);
- __ip_vs_update_dest(svc, dest, udest);
- ip_vs_new_estimator(&dest->stats);
-
- *dest_p = dest;
-
- LeaveFunction(2);
- return 0;
-}
-
-
-/*
- * Add a destination into an existing service
- */
-static int
-ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest)
-{
- struct ip_vs_dest *dest;
- __be32 daddr = udest->addr;
- __be16 dport = udest->port;
- int ret;
-
- EnterFunction(2);
-
- if (udest->weight < 0) {
- IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n");
- return -ERANGE;
- }
-
- if (udest->l_threshold > udest->u_threshold) {
- IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than "
- "upper threshold\n");
- return -ERANGE;
- }
-
- /*
- * Check if the dest already exists in the list
- */
- dest = ip_vs_lookup_dest(svc, daddr, dport);
- if (dest != NULL) {
- IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n");
- return -EEXIST;
- }
-
- /*
- * Check if the dest already exists in the trash and
- * is from the same service
- */
- dest = ip_vs_trash_get_dest(svc, daddr, dport);
- if (dest != NULL) {
- IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, "
- "dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n",
- NIPQUAD(daddr), ntohs(dport),
- atomic_read(&dest->refcnt),
- dest->vfwmark,
- NIPQUAD(dest->vaddr),
- ntohs(dest->vport));
- __ip_vs_update_dest(svc, dest, udest);
-
- /*
- * Get the destination from the trash
- */
- list_del(&dest->n_list);
-
- ip_vs_new_estimator(&dest->stats);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
- return 0;
- }
-
- /*
- * Allocate and initialize the dest structure
- */
- ret = ip_vs_new_dest(svc, udest, &dest);
- if (ret) {
- return ret;
- }
-
- /*
- * Add the dest entry into the list
- */
- atomic_inc(&dest->refcnt);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Edit a destination in the given service
- */
-static int
-ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest)
-{
- struct ip_vs_dest *dest;
- __be32 daddr = udest->addr;
- __be16 dport = udest->port;
-
- EnterFunction(2);
-
- if (udest->weight < 0) {
- IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n");
- return -ERANGE;
- }
-
- if (udest->l_threshold > udest->u_threshold) {
- IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than "
- "upper threshold\n");
- return -ERANGE;
- }
-
- /*
- * Lookup the destination list
- */
- dest = ip_vs_lookup_dest(svc, daddr, dport);
- if (dest == NULL) {
- IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n");
- return -ENOENT;
- }
-
- __ip_vs_update_dest(svc, dest, udest);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /* Wait until all other svc users go away */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /* call the update_service, because server weight may be changed */
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Delete a destination (must be already unlinked from the service)
- */
-static void __ip_vs_del_dest(struct ip_vs_dest *dest)
-{
- ip_vs_kill_estimator(&dest->stats);
-
- /*
- * Remove it from the d-linked list with the real services.
- */
- write_lock_bh(&__ip_vs_rs_lock);
- ip_vs_rs_unhash(dest);
- write_unlock_bh(&__ip_vs_rs_lock);
-
- /*
- * Decrease the refcnt of the dest, and free the dest
- * if nobody refers to it (refcnt=0). Otherwise, throw
- * the destination into the trash.
- */
- if (atomic_dec_and_test(&dest->refcnt)) {
- ip_vs_dst_reset(dest);
- /* simply decrease svc->refcnt here, let the caller check
- and release the service if nobody refers to it.
- Only user context can release destination and service,
- and only one user context can update virtual service at a
- time, so the operation here is OK */
- atomic_dec(&dest->svc->refcnt);
- kfree(dest);
- } else {
- IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, "
- "dest->refcnt=%d\n",
- NIPQUAD(dest->addr), ntohs(dest->port),
- atomic_read(&dest->refcnt));
- list_add(&dest->n_list, &ip_vs_dest_trash);
- atomic_inc(&dest->refcnt);
- }
-}
-
-
-/*
- * Unlink a destination from the given service
- */
-static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
- struct ip_vs_dest *dest,
- int svcupd)
-{
- dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
-
- /*
- * Remove it from the d-linked destination list.
- */
- list_del(&dest->n_list);
- svc->num_dests--;
- if (svcupd) {
- /*
- * Call the update_service function of its scheduler
- */
- svc->scheduler->update_service(svc);
- }
-}
-
-
-/*
- * Delete a destination server in the given service
- */
-static int
-ip_vs_del_dest(struct ip_vs_service *svc,struct ip_vs_dest_user *udest)
-{
- struct ip_vs_dest *dest;
- __be32 daddr = udest->addr;
- __be16 dport = udest->port;
-
- EnterFunction(2);
-
- dest = ip_vs_lookup_dest(svc, daddr, dport);
- if (dest == NULL) {
- IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n");
- return -ENOENT;
- }
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /*
- * Unlink dest from the service
- */
- __ip_vs_unlink_dest(svc, dest, 1);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- /*
- * Delete the destination
- */
- __ip_vs_del_dest(dest);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Add a service into the service hash table
- */
-static int
-ip_vs_add_service(struct ip_vs_service_user *u, struct ip_vs_service **svc_p)
-{
- int ret = 0;
- struct ip_vs_scheduler *sched = NULL;
- struct ip_vs_service *svc = NULL;
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- /* Lookup the scheduler by 'u->sched_name' */
- sched = ip_vs_scheduler_get(u->sched_name);
- if (sched == NULL) {
- IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
- u->sched_name);
- ret = -ENOENT;
- goto out_mod_dec;
- }
-
- svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC);
- if (svc == NULL) {
- IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n");
- ret = -ENOMEM;
- goto out_err;
- }
-
- /* I'm the first user of the service */
- atomic_set(&svc->usecnt, 1);
- atomic_set(&svc->refcnt, 0);
-
- svc->protocol = u->protocol;
- svc->addr = u->addr;
- svc->port = u->port;
- svc->fwmark = u->fwmark;
- svc->flags = u->flags;
- svc->timeout = u->timeout * HZ;
- svc->netmask = u->netmask;
-
- INIT_LIST_HEAD(&svc->destinations);
- rwlock_init(&svc->sched_lock);
- spin_lock_init(&svc->stats.lock);
-
- /* Bind the scheduler */
- ret = ip_vs_bind_scheduler(svc, sched);
- if (ret)
- goto out_err;
- sched = NULL;
-
- /* Update the virtual service counters */
- if (svc->port == FTPPORT)
- atomic_inc(&ip_vs_ftpsvc_counter);
- else if (svc->port == 0)
- atomic_inc(&ip_vs_nullsvc_counter);
-
- ip_vs_new_estimator(&svc->stats);
- ip_vs_num_services++;
-
- /* Hash the service into the service table */
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_hash(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
-
- *svc_p = svc;
- return 0;
-
- out_err:
- if (svc != NULL) {
- if (svc->scheduler)
- ip_vs_unbind_scheduler(svc);
- if (svc->inc) {
- local_bh_disable();
- ip_vs_app_inc_put(svc->inc);
- local_bh_enable();
- }
- kfree(svc);
- }
- ip_vs_scheduler_put(sched);
-
- out_mod_dec:
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- return ret;
-}
-
-
-/*
- * Edit a service and bind it with a new scheduler
- */
-static int
-ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user *u)
-{
- struct ip_vs_scheduler *sched, *old_sched;
- int ret = 0;
-
- /*
- * Lookup the scheduler, by 'u->sched_name'
- */
- sched = ip_vs_scheduler_get(u->sched_name);
- if (sched == NULL) {
- IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
- u->sched_name);
- return -ENOENT;
- }
- old_sched = sched;
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /*
- * Set the flags and timeout value
- */
- svc->flags = u->flags | IP_VS_SVC_F_HASHED;
- svc->timeout = u->timeout * HZ;
- svc->netmask = u->netmask;
-
- old_sched = svc->scheduler;
- if (sched != old_sched) {
- /*
- * Unbind the old scheduler
- */
- if ((ret = ip_vs_unbind_scheduler(svc))) {
- old_sched = sched;
- goto out;
- }
-
- /*
- * Bind the new scheduler
- */
- if ((ret = ip_vs_bind_scheduler(svc, sched))) {
- /*
- * If ip_vs_bind_scheduler fails, restore the old
- * scheduler.
- * The main reason of failure is out of memory.
- *
- * The question is if the old scheduler can be
- * restored all the time. TODO: if it cannot be
- * restored some time, we must delete the service,
- * otherwise the system may crash.
- */
- ip_vs_bind_scheduler(svc, old_sched);
- old_sched = sched;
- goto out;
- }
- }
-
- out:
- write_unlock_bh(&__ip_vs_svc_lock);
-
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
-
- return ret;
-}
-
-
-/*
- * Delete a service from the service list
- * - The service must be unlinked, unlocked and not referenced!
- * - We are called under _bh lock
- */
-static void __ip_vs_del_service(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest, *nxt;
- struct ip_vs_scheduler *old_sched;
-
- ip_vs_num_services--;
- ip_vs_kill_estimator(&svc->stats);
-
- /* Unbind scheduler */
- old_sched = svc->scheduler;
- ip_vs_unbind_scheduler(svc);
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
-
- /* Unbind app inc */
- if (svc->inc) {
- ip_vs_app_inc_put(svc->inc);
- svc->inc = NULL;
- }
-
- /*
- * Unlink the whole destination list
- */
- list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
- __ip_vs_unlink_dest(svc, dest, 0);
- __ip_vs_del_dest(dest);
- }
-
- /*
- * Update the virtual service counters
- */
- if (svc->port == FTPPORT)
- atomic_dec(&ip_vs_ftpsvc_counter);
- else if (svc->port == 0)
- atomic_dec(&ip_vs_nullsvc_counter);
-
- /*
- * Free the service if nobody refers to it
- */
- if (atomic_read(&svc->refcnt) == 0)
- kfree(svc);
-
- /* decrease the module use count */
- ip_vs_use_count_dec();
-}
-
-/*
- * Delete a service from the service list
- */
-static int ip_vs_del_service(struct ip_vs_service *svc)
-{
- if (svc == NULL)
- return -EEXIST;
-
- /*
- * Unhash it from the service table
- */
- write_lock_bh(&__ip_vs_svc_lock);
-
- ip_vs_svc_unhash(svc);
-
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- __ip_vs_del_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- return 0;
-}
-
-
-/*
- * Flush all the virtual services
- */
-static int ip_vs_flush(void)
-{
- int idx;
- struct ip_vs_service *svc, *nxt;
-
- /*
- * Flush the service table hashed by <protocol,addr,port>
- */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
- }
- }
-
- /*
- * Flush the service table hashed by fwmark
- */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry_safe(svc, nxt,
- &ip_vs_svc_fwm_table[idx], f_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
- }
- }
-
- return 0;
-}
-
-
-/*
- * Zero counters in a service or all services
- */
-static int ip_vs_zero_service(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest;
-
- write_lock_bh(&__ip_vs_svc_lock);
- list_for_each_entry(dest, &svc->destinations, n_list) {
- ip_vs_zero_stats(&dest->stats);
- }
- ip_vs_zero_stats(&svc->stats);
- write_unlock_bh(&__ip_vs_svc_lock);
- return 0;
-}
-
-static int ip_vs_zero_all(void)
-{
- int idx;
- struct ip_vs_service *svc;
-
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- ip_vs_zero_service(svc);
- }
- }
-
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- ip_vs_zero_service(svc);
- }
- }
-
- ip_vs_zero_stats(&ip_vs_stats);
- return 0;
-}
-
-
-static int
-proc_do_defense_mode(ctl_table *table, int write, struct file * filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int *valp = table->data;
- int val = *valp;
- int rc;
-
- rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if (write && (*valp != val)) {
- if ((*valp < 0) || (*valp > 3)) {
- /* Restore the correct value */
- *valp = val;
- } else {
- update_defense_level();
- }
- }
- return rc;
-}
-
-
-static int
-proc_do_sync_threshold(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int *valp = table->data;
- int val[2];
- int rc;
-
- /* backup the value first */
- memcpy(val, valp, sizeof(val));
-
- rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
- /* Restore the correct value */
- memcpy(valp, val, sizeof(val));
- }
- return rc;
-}
-
-
-/*
- * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
- */
-
-static struct ctl_table vs_vars[] = {
- {
- .procname = "amemthresh",
- .data = &sysctl_ip_vs_amemthresh,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
-#ifdef CONFIG_IP_VS_DEBUG
- {
- .procname = "debug_level",
- .data = &sysctl_ip_vs_debug_level,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
-#endif
- {
- .procname = "am_droprate",
- .data = &sysctl_ip_vs_am_droprate,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "drop_entry",
- .data = &sysctl_ip_vs_drop_entry,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
- {
- .procname = "drop_packet",
- .data = &sysctl_ip_vs_drop_packet,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
- {
- .procname = "secure_tcp",
- .data = &sysctl_ip_vs_secure_tcp,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
-#if 0
- {
- .procname = "timeout_established",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synsent",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synrecv",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_finwait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_timewait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_close",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_closewait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_lastack",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_listen",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synack",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_udp",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_icmp",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
-#endif
- {
- .procname = "cache_bypass",
- .data = &sysctl_ip_vs_cache_bypass,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "expire_nodest_conn",
- .data = &sysctl_ip_vs_expire_nodest_conn,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "expire_quiescent_template",
- .data = &sysctl_ip_vs_expire_quiescent_template,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "sync_threshold",
- .data = &sysctl_ip_vs_sync_threshold,
- .maxlen = sizeof(sysctl_ip_vs_sync_threshold),
- .mode = 0644,
- .proc_handler = &proc_do_sync_threshold,
- },
- {
- .procname = "nat_icmp_send",
- .data = &sysctl_ip_vs_nat_icmp_send,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- { .ctl_name = 0 }
-};
-
-const struct ctl_path net_vs_ctl_path[] = {
- { .procname = "net", .ctl_name = CTL_NET, },
- { .procname = "ipv4", .ctl_name = NET_IPV4, },
- { .procname = "vs", },
- { }
-};
-EXPORT_SYMBOL_GPL(net_vs_ctl_path);
-
-static struct ctl_table_header * sysctl_header;
-
-#ifdef CONFIG_PROC_FS
-
-struct ip_vs_iter {
- struct list_head *table;
- int bucket;
-};
-
-/*
- * Write the contents of the VS rule table to a PROCfs file.
- * (It is kept just for backward compatibility)
- */
-static inline const char *ip_vs_fwd_name(unsigned flags)
-{
- switch (flags & IP_VS_CONN_F_FWD_MASK) {
- case IP_VS_CONN_F_LOCALNODE:
- return "Local";
- case IP_VS_CONN_F_TUNNEL:
- return "Tunnel";
- case IP_VS_CONN_F_DROUTE:
- return "Route";
- default:
- return "Masq";
- }
-}
-
-
-/* Get the Nth entry in the two lists */
-static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
-{
- struct ip_vs_iter *iter = seq->private;
- int idx;
- struct ip_vs_service *svc;
-
- /* look in hash by protocol */
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- if (pos-- == 0){
- iter->table = ip_vs_svc_table;
- iter->bucket = idx;
- return svc;
- }
- }
- }
-
- /* keep looking in fwmark */
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- if (pos-- == 0) {
- iter->table = ip_vs_svc_fwm_table;
- iter->bucket = idx;
- return svc;
- }
- }
- }
-
- return NULL;
-}
-
-static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
-{
-
- read_lock_bh(&__ip_vs_svc_lock);
- return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
-}
-
-
-static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct list_head *e;
- struct ip_vs_iter *iter;
- struct ip_vs_service *svc;
-
- ++*pos;
- if (v == SEQ_START_TOKEN)
- return ip_vs_info_array(seq,0);
-
- svc = v;
- iter = seq->private;
-
- if (iter->table == ip_vs_svc_table) {
- /* next service in table hashed by protocol */
- if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
- return list_entry(e, struct ip_vs_service, s_list);
-
-
- while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
- list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
- s_list) {
- return svc;
- }
- }
-
- iter->table = ip_vs_svc_fwm_table;
- iter->bucket = -1;
- goto scan_fwmark;
- }
-
- /* next service in hashed by fwmark */
- if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
- return list_entry(e, struct ip_vs_service, f_list);
-
- scan_fwmark:
- while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
- f_list)
- return svc;
- }
-
- return NULL;
-}
-
-static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
-{
- read_unlock_bh(&__ip_vs_svc_lock);
-}
-
-
-static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_printf(seq,
- "IP Virtual Server version %d.%d.%d (size=%d)\n",
- NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
- seq_puts(seq,
- "Prot LocalAddress:Port Scheduler Flags\n");
- seq_puts(seq,
- " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
- } else {
- const struct ip_vs_service *svc = v;
- const struct ip_vs_iter *iter = seq->private;
- const struct ip_vs_dest *dest;
-
- if (iter->table == ip_vs_svc_table)
- seq_printf(seq, "%s %08X:%04X %s ",
- ip_vs_proto_name(svc->protocol),
- ntohl(svc->addr),
- ntohs(svc->port),
- svc->scheduler->name);
- else
- seq_printf(seq, "FWM %08X %s ",
- svc->fwmark, svc->scheduler->name);
-
- if (svc->flags & IP_VS_SVC_F_PERSISTENT)
- seq_printf(seq, "persistent %d %08X\n",
- svc->timeout,
- ntohl(svc->netmask));
- else
- seq_putc(seq, '\n');
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- seq_printf(seq,
- " -> %08X:%04X %-7s %-6d %-10d %-10d\n",
- ntohl(dest->addr), ntohs(dest->port),
- ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
- atomic_read(&dest->weight),
- atomic_read(&dest->activeconns),
- atomic_read(&dest->inactconns));
- }
- }
- return 0;
-}
-
-static const struct seq_operations ip_vs_info_seq_ops = {
- .start = ip_vs_info_seq_start,
- .next = ip_vs_info_seq_next,
- .stop = ip_vs_info_seq_stop,
- .show = ip_vs_info_seq_show,
-};
-
-static int ip_vs_info_open(struct inode *inode, struct file *file)
-{
- return seq_open_private(file, &ip_vs_info_seq_ops,
- sizeof(struct ip_vs_iter));
-}
-
-static const struct file_operations ip_vs_info_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_info_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
-};
-
-#endif
-
-struct ip_vs_stats ip_vs_stats = {
- .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
-};
-
-#ifdef CONFIG_PROC_FS
-static int ip_vs_stats_show(struct seq_file *seq, void *v)
-{
-
-/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
- seq_puts(seq,
- " Total Incoming Outgoing Incoming Outgoing\n");
- seq_printf(seq,
- " Conns Packets Packets Bytes Bytes\n");
-
- spin_lock_bh(&ip_vs_stats.lock);
- seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns,
- ip_vs_stats.inpkts, ip_vs_stats.outpkts,
- (unsigned long long) ip_vs_stats.inbytes,
- (unsigned long long) ip_vs_stats.outbytes);
-
-/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
- seq_puts(seq,
- " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
- seq_printf(seq,"%8X %8X %8X %16X %16X\n",
- ip_vs_stats.cps,
- ip_vs_stats.inpps,
- ip_vs_stats.outpps,
- ip_vs_stats.inbps,
- ip_vs_stats.outbps);
- spin_unlock_bh(&ip_vs_stats.lock);
-
- return 0;
-}
-
-static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ip_vs_stats_show, NULL);
-}
-
-static const struct file_operations ip_vs_stats_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_stats_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-#endif
-
-/*
- * Set timeout values for tcp tcpfin udp in the timeout_table.
- */
-static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
-{
- IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
- u->tcp_timeout,
- u->tcp_fin_timeout,
- u->udp_timeout);
-
-#ifdef CONFIG_IP_VS_PROTO_TCP
- if (u->tcp_timeout) {
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
- = u->tcp_timeout * HZ;
- }
-
- if (u->tcp_fin_timeout) {
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
- = u->tcp_fin_timeout * HZ;
- }
-#endif
-
-#ifdef CONFIG_IP_VS_PROTO_UDP
- if (u->udp_timeout) {
- ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
- = u->udp_timeout * HZ;
- }
-#endif
- return 0;
-}
-
-
-#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
-#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
-#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
- sizeof(struct ip_vs_dest_user))
-#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
-#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
-#define MAX_ARG_LEN SVCDEST_ARG_LEN
-
-static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
- [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
- [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
-};
-
-static int
-do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
-{
- int ret;
- unsigned char arg[MAX_ARG_LEN];
- struct ip_vs_service_user *usvc;
- struct ip_vs_service *svc;
- struct ip_vs_dest_user *udest;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (len != set_arglen[SET_CMDID(cmd)]) {
- IP_VS_ERR("set_ctl: len %u != %u\n",
- len, set_arglen[SET_CMDID(cmd)]);
- return -EINVAL;
- }
-
- if (copy_from_user(arg, user, len) != 0)
- return -EFAULT;
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- if (mutex_lock_interruptible(&__ip_vs_mutex)) {
- ret = -ERESTARTSYS;
- goto out_dec;
- }
-
- if (cmd == IP_VS_SO_SET_FLUSH) {
- /* Flush the virtual service */
- ret = ip_vs_flush();
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
- /* Set timeout values for (tcp tcpfin udp) */
- ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
- struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
- ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
- struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
- ret = stop_sync_thread(dm->state);
- goto out_unlock;
- }
-
- usvc = (struct ip_vs_service_user *)arg;
- udest = (struct ip_vs_dest_user *)(usvc + 1);
-
- if (cmd == IP_VS_SO_SET_ZERO) {
- /* if no service address is set, zero counters in all */
- if (!usvc->fwmark && !usvc->addr && !usvc->port) {
- ret = ip_vs_zero_all();
- goto out_unlock;
- }
- }
-
- /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */
- if (usvc->protocol!=IPPROTO_TCP && usvc->protocol!=IPPROTO_UDP) {
- IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n",
- usvc->protocol, NIPQUAD(usvc->addr),
- ntohs(usvc->port), usvc->sched_name);
- ret = -EFAULT;
- goto out_unlock;
- }
-
- /* Lookup the exact service by <protocol, addr, port> or fwmark */
- if (usvc->fwmark == 0)
- svc = __ip_vs_service_get(usvc->protocol,
- usvc->addr, usvc->port);
- else
- svc = __ip_vs_svc_fwm_get(usvc->fwmark);
-
- if (cmd != IP_VS_SO_SET_ADD
- && (svc == NULL || svc->protocol != usvc->protocol)) {
- ret = -ESRCH;
- goto out_unlock;
- }
-
- switch (cmd) {
- case IP_VS_SO_SET_ADD:
- if (svc != NULL)
- ret = -EEXIST;
- else
- ret = ip_vs_add_service(usvc, &svc);
- break;
- case IP_VS_SO_SET_EDIT:
- ret = ip_vs_edit_service(svc, usvc);
- break;
- case IP_VS_SO_SET_DEL:
- ret = ip_vs_del_service(svc);
- if (!ret)
- goto out_unlock;
- break;
- case IP_VS_SO_SET_ZERO:
- ret = ip_vs_zero_service(svc);
- break;
- case IP_VS_SO_SET_ADDDEST:
- ret = ip_vs_add_dest(svc, udest);
- break;
- case IP_VS_SO_SET_EDITDEST:
- ret = ip_vs_edit_dest(svc, udest);
- break;
- case IP_VS_SO_SET_DELDEST:
- ret = ip_vs_del_dest(svc, udest);
- break;
- default:
- ret = -EINVAL;
- }
-
- if (svc)
- ip_vs_service_put(svc);
-
- out_unlock:
- mutex_unlock(&__ip_vs_mutex);
- out_dec:
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- return ret;
-}
-
-
-static void
-ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
-{
- spin_lock_bh(&src->lock);
- memcpy(dst, src, (char*)&src->lock - (char*)src);
- spin_unlock_bh(&src->lock);
-}
-
-static void
-ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
-{
- dst->protocol = src->protocol;
- dst->addr = src->addr;
- dst->port = src->port;
- dst->fwmark = src->fwmark;
- strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
- dst->flags = src->flags;
- dst->timeout = src->timeout / HZ;
- dst->netmask = src->netmask;
- dst->num_dests = src->num_dests;
- ip_vs_copy_stats(&dst->stats, &src->stats);
-}
-
-static inline int
-__ip_vs_get_service_entries(const struct ip_vs_get_services *get,
- struct ip_vs_get_services __user *uptr)
-{
- int idx, count=0;
- struct ip_vs_service *svc;
- struct ip_vs_service_entry entry;
- int ret = 0;
-
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- if (count >= get->num_services)
- goto out;
- memset(&entry, 0, sizeof(entry));
- ip_vs_copy_service(&entry, svc);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- goto out;
- }
- count++;
- }
- }
-
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- if (count >= get->num_services)
- goto out;
- memset(&entry, 0, sizeof(entry));
- ip_vs_copy_service(&entry, svc);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- goto out;
- }
- count++;
- }
- }
- out:
- return ret;
-}
-
-static inline int
-__ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
- struct ip_vs_get_dests __user *uptr)
-{
- struct ip_vs_service *svc;
- int ret = 0;
-
- if (get->fwmark)
- svc = __ip_vs_svc_fwm_get(get->fwmark);
- else
- svc = __ip_vs_service_get(get->protocol,
- get->addr, get->port);
- if (svc) {
- int count = 0;
- struct ip_vs_dest *dest;
- struct ip_vs_dest_entry entry;
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (count >= get->num_dests)
- break;
-
- entry.addr = dest->addr;
- entry.port = dest->port;
- entry.conn_flags = atomic_read(&dest->conn_flags);
- entry.weight = atomic_read(&dest->weight);
- entry.u_threshold = dest->u_threshold;
- entry.l_threshold = dest->l_threshold;
- entry.activeconns = atomic_read(&dest->activeconns);
- entry.inactconns = atomic_read(&dest->inactconns);
- entry.persistconns = atomic_read(&dest->persistconns);
- ip_vs_copy_stats(&entry.stats, &dest->stats);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- break;
- }
- count++;
- }
- ip_vs_service_put(svc);
- } else
- ret = -ESRCH;
- return ret;
-}
-
-static inline void
-__ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
-{
-#ifdef CONFIG_IP_VS_PROTO_TCP
- u->tcp_timeout =
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
- u->tcp_fin_timeout =
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
-#endif
-#ifdef CONFIG_IP_VS_PROTO_UDP
- u->udp_timeout =
- ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
-#endif
-}
-
-
-#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
-#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
-#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
-#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
-#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
-#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
-#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
-
-static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
- [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
- [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
-};
-
-static int
-do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
-{
- unsigned char arg[128];
- int ret = 0;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (*len < get_arglen[GET_CMDID(cmd)]) {
- IP_VS_ERR("get_ctl: len %u < %u\n",
- *len, get_arglen[GET_CMDID(cmd)]);
- return -EINVAL;
- }
-
- if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0)
- return -EFAULT;
-
- if (mutex_lock_interruptible(&__ip_vs_mutex))
- return -ERESTARTSYS;
-
- switch (cmd) {
- case IP_VS_SO_GET_VERSION:
- {
- char buf[64];
-
- sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
- NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
- if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
- ret = -EFAULT;
- goto out;
- }
- *len = strlen(buf)+1;
- }
- break;
-
- case IP_VS_SO_GET_INFO:
- {
- struct ip_vs_getinfo info;
- info.version = IP_VS_VERSION_CODE;
- info.size = IP_VS_CONN_TAB_SIZE;
- info.num_services = ip_vs_num_services;
- if (copy_to_user(user, &info, sizeof(info)) != 0)
- ret = -EFAULT;
- }
- break;
-
- case IP_VS_SO_GET_SERVICES:
- {
- struct ip_vs_get_services *get;
- int size;
-
- get = (struct ip_vs_get_services *)arg;
- size = sizeof(*get) +
- sizeof(struct ip_vs_service_entry) * get->num_services;
- if (*len != size) {
- IP_VS_ERR("length: %u != %u\n", *len, size);
- ret = -EINVAL;
- goto out;
- }
- ret = __ip_vs_get_service_entries(get, user);
- }
- break;
-
- case IP_VS_SO_GET_SERVICE:
- {
- struct ip_vs_service_entry *entry;
- struct ip_vs_service *svc;
-
- entry = (struct ip_vs_service_entry *)arg;
- if (entry->fwmark)
- svc = __ip_vs_svc_fwm_get(entry->fwmark);
- else
- svc = __ip_vs_service_get(entry->protocol,
- entry->addr, entry->port);
- if (svc) {
- ip_vs_copy_service(entry, svc);
- if (copy_to_user(user, entry, sizeof(*entry)) != 0)
- ret = -EFAULT;
- ip_vs_service_put(svc);
- } else
- ret = -ESRCH;
- }
- break;
-
- case IP_VS_SO_GET_DESTS:
- {
- struct ip_vs_get_dests *get;
- int size;
-
- get = (struct ip_vs_get_dests *)arg;
- size = sizeof(*get) +
- sizeof(struct ip_vs_dest_entry) * get->num_dests;
- if (*len != size) {
- IP_VS_ERR("length: %u != %u\n", *len, size);
- ret = -EINVAL;
- goto out;
- }
- ret = __ip_vs_get_dest_entries(get, user);
- }
- break;
-
- case IP_VS_SO_GET_TIMEOUT:
- {
- struct ip_vs_timeout_user t;
-
- __ip_vs_get_timeouts(&t);
- if (copy_to_user(user, &t, sizeof(t)) != 0)
- ret = -EFAULT;
- }
- break;
-
- case IP_VS_SO_GET_DAEMON:
- {
- struct ip_vs_daemon_user d[2];
-
- memset(&d, 0, sizeof(d));
- if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
- d[0].state = IP_VS_STATE_MASTER;
- strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
- d[0].syncid = ip_vs_master_syncid;
- }
- if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
- d[1].state = IP_VS_STATE_BACKUP;
- strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
- d[1].syncid = ip_vs_backup_syncid;
- }
- if (copy_to_user(user, &d, sizeof(d)) != 0)
- ret = -EFAULT;
- }
- break;
-
- default:
- ret = -EINVAL;
- }
-
- out:
- mutex_unlock(&__ip_vs_mutex);
- return ret;
-}
-
-
-static struct nf_sockopt_ops ip_vs_sockopts = {
- .pf = PF_INET,
- .set_optmin = IP_VS_BASE_CTL,
- .set_optmax = IP_VS_SO_SET_MAX+1,
- .set = do_ip_vs_set_ctl,
- .get_optmin = IP_VS_BASE_CTL,
- .get_optmax = IP_VS_SO_GET_MAX+1,
- .get = do_ip_vs_get_ctl,
- .owner = THIS_MODULE,
-};
-
-
-int __init ip_vs_control_init(void)
-{
- int ret;
- int idx;
-
- EnterFunction(2);
-
- ret = nf_register_sockopt(&ip_vs_sockopts);
- if (ret) {
- IP_VS_ERR("cannot register sockopt.\n");
- return ret;
- }
-
- proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
- proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
-
- sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
-
- /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
- INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
- }
- for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_rtable[idx]);
- }
-
- ip_vs_new_estimator(&ip_vs_stats);
-
- /* Hook the defense timer */
- schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
-
- LeaveFunction(2);
- return 0;
-}
-
-
-void ip_vs_control_cleanup(void)
-{
- EnterFunction(2);
- ip_vs_trash_cleanup();
- cancel_rearming_delayed_work(&defense_work);
- cancel_work_sync(&defense_work.work);
- ip_vs_kill_estimator(&ip_vs_stats);
- unregister_sysctl_table(sysctl_header);
- proc_net_remove(&init_net, "ip_vs_stats");
- proc_net_remove(&init_net, "ip_vs");
- nf_unregister_sockopt(&ip_vs_sockopts);
- LeaveFunction(2);
-}
diff --git a/net/ipv4/ipvs/ip_vs_dh.c b/net/ipv4/ipvs/ip_vs_dh.c
deleted file mode 100644
index fa66824d264..00000000000
--- a/net/ipv4/ipvs/ip_vs_dh.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * IPVS: Destination Hashing scheduling module
- *
- * Authors: Wensong Zhang <wensong@gnuchina.org>
- *
- * Inspired by the consistent hashing scheduler patch from
- * Thomas Proell <proellt@gmx.de>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-/*
- * The dh algorithm is to select server by the hash key of destination IP
- * address. The pseudo code is as follows:
- *
- * n <- servernode[dest_ip];
- * if (n is dead) OR
- * (n is overloaded) OR (n.weight <= 0) then
- * return NULL;
- *
- * return n;
- *
- * Notes that servernode is a 256-bucket hash table that maps the hash
- * index derived from packet destination IP address to the current server
- * array. If the dh scheduler is used in cache cluster, it is good to
- * combine it with cache_bypass feature. When the statically assigned
- * server is dead or overloaded, the load balancer can bypass the cache
- * server and send requests to the original server directly.
- *
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * IPVS DH bucket
- */
-struct ip_vs_dh_bucket {
- struct ip_vs_dest *dest; /* real server (cache) */
-};
-
-/*
- * for IPVS DH entry hash table
- */
-#ifndef CONFIG_IP_VS_DH_TAB_BITS
-#define CONFIG_IP_VS_DH_TAB_BITS 8
-#endif
-#define IP_VS_DH_TAB_BITS CONFIG_IP_VS_DH_TAB_BITS
-#define IP_VS_DH_TAB_SIZE (1 << IP_VS_DH_TAB_BITS)
-#define IP_VS_DH_TAB_MASK (IP_VS_DH_TAB_SIZE - 1)
-
-
-/*
- * Returns hash value for IPVS DH entry
- */
-static inline unsigned ip_vs_dh_hashkey(__be32 addr)
-{
- return (ntohl(addr)*2654435761UL) & IP_VS_DH_TAB_MASK;
-}
-
-
-/*
- * Get ip_vs_dest associated with supplied parameters.
- */
-static inline struct ip_vs_dest *
-ip_vs_dh_get(struct ip_vs_dh_bucket *tbl, __be32 addr)
-{
- return (tbl[ip_vs_dh_hashkey(addr)]).dest;
-}
-
-
-/*
- * Assign all the hash buckets of the specified table with the service.
- */
-static int
-ip_vs_dh_assign(struct ip_vs_dh_bucket *tbl, struct ip_vs_service *svc)
-{
- int i;
- struct ip_vs_dh_bucket *b;
- struct list_head *p;
- struct ip_vs_dest *dest;
-
- b = tbl;
- p = &svc->destinations;
- for (i=0; i<IP_VS_DH_TAB_SIZE; i++) {
- if (list_empty(p)) {
- b->dest = NULL;
- } else {
- if (p == &svc->destinations)
- p = p->next;
-
- dest = list_entry(p, struct ip_vs_dest, n_list);
- atomic_inc(&dest->refcnt);
- b->dest = dest;
-
- p = p->next;
- }
- b++;
- }
- return 0;
-}
-
-
-/*
- * Flush all the hash buckets of the specified table.
- */
-static void ip_vs_dh_flush(struct ip_vs_dh_bucket *tbl)
-{
- int i;
- struct ip_vs_dh_bucket *b;
-
- b = tbl;
- for (i=0; i<IP_VS_DH_TAB_SIZE; i++) {
- if (b->dest) {
- atomic_dec(&b->dest->refcnt);
- b->dest = NULL;
- }
- b++;
- }
-}
-
-
-static int ip_vs_dh_init_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_dh_bucket *tbl;
-
- /* allocate the DH table for this service */
- tbl = kmalloc(sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE,
- GFP_ATOMIC);
- if (tbl == NULL) {
- IP_VS_ERR("ip_vs_dh_init_svc(): no memory\n");
- return -ENOMEM;
- }
- svc->sched_data = tbl;
- IP_VS_DBG(6, "DH hash table (memory=%Zdbytes) allocated for "
- "current service\n",
- sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE);
-
- /* assign the hash buckets with the updated service */
- ip_vs_dh_assign(tbl, svc);
-
- return 0;
-}
-
-
-static int ip_vs_dh_done_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_dh_bucket *tbl = svc->sched_data;
-
- /* got to clean up hash buckets here */
- ip_vs_dh_flush(tbl);
-
- /* release the table itself */
- kfree(svc->sched_data);
- IP_VS_DBG(6, "DH hash table (memory=%Zdbytes) released\n",
- sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE);
-
- return 0;
-}
-
-
-static int ip_vs_dh_update_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_dh_bucket *tbl = svc->sched_data;
-
- /* got to clean up hash buckets here */
- ip_vs_dh_flush(tbl);
-
- /* assign the hash buckets with the updated service */
- ip_vs_dh_assign(tbl, svc);
-
- return 0;
-}
-
-
-/*
- * If the dest flags is set with IP_VS_DEST_F_OVERLOAD,
- * consider that the server is overloaded here.
- */
-static inline int is_overloaded(struct ip_vs_dest *dest)
-{
- return dest->flags & IP_VS_DEST_F_OVERLOAD;
-}
-
-
-/*
- * Destination hashing scheduling
- */
-static struct ip_vs_dest *
-ip_vs_dh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_dh_bucket *tbl;
- struct iphdr *iph = ip_hdr(skb);
-
- IP_VS_DBG(6, "ip_vs_dh_schedule(): Scheduling...\n");
-
- tbl = (struct ip_vs_dh_bucket *)svc->sched_data;
- dest = ip_vs_dh_get(tbl, iph->daddr);
- if (!dest
- || !(dest->flags & IP_VS_DEST_F_AVAILABLE)
- || atomic_read(&dest->weight) <= 0
- || is_overloaded(dest)) {
- return NULL;
- }
-
- IP_VS_DBG(6, "DH: destination IP address %u.%u.%u.%u "
- "--> server %u.%u.%u.%u:%d\n",
- NIPQUAD(iph->daddr),
- NIPQUAD(dest->addr),
- ntohs(dest->port));
-
- return dest;
-}
-
-
-/*
- * IPVS DH Scheduler structure
- */
-static struct ip_vs_scheduler ip_vs_dh_scheduler =
-{
- .name = "dh",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_dh_scheduler.n_list),
- .init_service = ip_vs_dh_init_svc,
- .done_service = ip_vs_dh_done_svc,
- .update_service = ip_vs_dh_update_svc,
- .schedule = ip_vs_dh_schedule,
-};
-
-
-static int __init ip_vs_dh_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_dh_scheduler);
-}
-
-
-static void __exit ip_vs_dh_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_dh_scheduler);
-}
-
-
-module_init(ip_vs_dh_init);
-module_exit(ip_vs_dh_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_est.c b/net/ipv4/ipvs/ip_vs_est.c
deleted file mode 100644
index 5a20f93bd7f..00000000000
--- a/net/ipv4/ipvs/ip_vs_est.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * ip_vs_est.c: simple rate estimator for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/sysctl.h>
-#include <linux/list.h>
-
-#include <net/ip_vs.h>
-
-/*
- This code is to estimate rate in a shorter interval (such as 8
- seconds) for virtual services and real servers. For measure rate in a
- long interval, it is easy to implement a user level daemon which
- periodically reads those statistical counters and measure rate.
-
- Currently, the measurement is activated by slow timer handler. Hope
- this measurement will not introduce too much load.
-
- We measure rate during the last 8 seconds every 2 seconds:
-
- avgrate = avgrate*(1-W) + rate*W
-
- where W = 2^(-2)
-
- NOTES.
-
- * The stored value for average bps is scaled by 2^5, so that maximal
- rate is ~2.15Gbits/s, average pps and cps are scaled by 2^10.
-
- * A lot code is taken from net/sched/estimator.c
- */
-
-
-static void estimation_timer(unsigned long arg);
-
-static LIST_HEAD(est_list);
-static DEFINE_SPINLOCK(est_lock);
-static DEFINE_TIMER(est_timer, estimation_timer, 0, 0);
-
-static void estimation_timer(unsigned long arg)
-{
- struct ip_vs_estimator *e;
- struct ip_vs_stats *s;
- u32 n_conns;
- u32 n_inpkts, n_outpkts;
- u64 n_inbytes, n_outbytes;
- u32 rate;
-
- spin_lock(&est_lock);
- list_for_each_entry(e, &est_list, list) {
- s = container_of(e, struct ip_vs_stats, est);
-
- spin_lock(&s->lock);
- n_conns = s->conns;
- n_inpkts = s->inpkts;
- n_outpkts = s->outpkts;
- n_inbytes = s->inbytes;
- n_outbytes = s->outbytes;
-
- /* scaled by 2^10, but divided 2 seconds */
- rate = (n_conns - e->last_conns)<<9;
- e->last_conns = n_conns;
- e->cps += ((long)rate - (long)e->cps)>>2;
- s->cps = (e->cps+0x1FF)>>10;
-
- rate = (n_inpkts - e->last_inpkts)<<9;
- e->last_inpkts = n_inpkts;
- e->inpps += ((long)rate - (long)e->inpps)>>2;
- s->inpps = (e->inpps+0x1FF)>>10;
-
- rate = (n_outpkts - e->last_outpkts)<<9;
- e->last_outpkts = n_outpkts;
- e->outpps += ((long)rate - (long)e->outpps)>>2;
- s->outpps = (e->outpps+0x1FF)>>10;
-
- rate = (n_inbytes - e->last_inbytes)<<4;
- e->last_inbytes = n_inbytes;
- e->inbps += ((long)rate - (long)e->inbps)>>2;
- s->inbps = (e->inbps+0xF)>>5;
-
- rate = (n_outbytes - e->last_outbytes)<<4;
- e->last_outbytes = n_outbytes;
- e->outbps += ((long)rate - (long)e->outbps)>>2;
- s->outbps = (e->outbps+0xF)>>5;
- spin_unlock(&s->lock);
- }
- spin_unlock(&est_lock);
- mod_timer(&est_timer, jiffies + 2*HZ);
-}
-
-void ip_vs_new_estimator(struct ip_vs_stats *stats)
-{
- struct ip_vs_estimator *est = &stats->est;
-
- INIT_LIST_HEAD(&est->list);
-
- est->last_conns = stats->conns;
- est->cps = stats->cps<<10;
-
- est->last_inpkts = stats->inpkts;
- est->inpps = stats->inpps<<10;
-
- est->last_outpkts = stats->outpkts;
- est->outpps = stats->outpps<<10;
-
- est->last_inbytes = stats->inbytes;
- est->inbps = stats->inbps<<5;
-
- est->last_outbytes = stats->outbytes;
- est->outbps = stats->outbps<<5;
-
- spin_lock_bh(&est_lock);
- if (list_empty(&est_list))
- mod_timer(&est_timer, jiffies + 2 * HZ);
- list_add(&est->list, &est_list);
- spin_unlock_bh(&est_lock);
-}
-
-void ip_vs_kill_estimator(struct ip_vs_stats *stats)
-{
- struct ip_vs_estimator *est = &stats->est;
-
- spin_lock_bh(&est_lock);
- list_del(&est->list);
- while (list_empty(&est_list) && try_to_del_timer_sync(&est_timer) < 0) {
- spin_unlock_bh(&est_lock);
- cpu_relax();
- spin_lock_bh(&est_lock);
- }
- spin_unlock_bh(&est_lock);
-}
-
-void ip_vs_zero_estimator(struct ip_vs_stats *stats)
-{
- struct ip_vs_estimator *est = &stats->est;
-
- /* set counters zero, caller must hold the stats->lock lock */
- est->last_inbytes = 0;
- est->last_outbytes = 0;
- est->last_conns = 0;
- est->last_inpkts = 0;
- est->last_outpkts = 0;
- est->cps = 0;
- est->inpps = 0;
- est->outpps = 0;
- est->inbps = 0;
- est->outbps = 0;
-}
diff --git a/net/ipv4/ipvs/ip_vs_ftp.c b/net/ipv4/ipvs/ip_vs_ftp.c
deleted file mode 100644
index c1c758e4f73..00000000000
--- a/net/ipv4/ipvs/ip_vs_ftp.c
+++ /dev/null
@@ -1,393 +0,0 @@
-/*
- * ip_vs_ftp.c: IPVS ftp application module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * Changes:
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Most code here is taken from ip_masq_ftp.c in kernel 2.2. The difference
- * is that ip_vs_ftp module handles the reverse direction to ip_masq_ftp.
- *
- * IP_MASQ_FTP ftp masquerading module
- *
- * Version: @(#)ip_masq_ftp.c 0.04 02/05/96
- *
- * Author: Wouter Gadeyne
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/netfilter.h>
-#include <net/protocol.h>
-#include <net/tcp.h>
-#include <asm/unaligned.h>
-
-#include <net/ip_vs.h>
-
-
-#define SERVER_STRING "227 Entering Passive Mode ("
-#define CLIENT_STRING "PORT "
-
-
-/*
- * List of ports (up to IP_VS_APP_MAX_PORTS) to be handled by helper
- * First port is set to the default port.
- */
-static unsigned short ports[IP_VS_APP_MAX_PORTS] = {21, 0};
-module_param_array(ports, ushort, NULL, 0);
-MODULE_PARM_DESC(ports, "Ports to monitor for FTP control commands");
-
-
-/* Dummy variable */
-static int ip_vs_ftp_pasv;
-
-
-static int
-ip_vs_ftp_init_conn(struct ip_vs_app *app, struct ip_vs_conn *cp)
-{
- return 0;
-}
-
-
-static int
-ip_vs_ftp_done_conn(struct ip_vs_app *app, struct ip_vs_conn *cp)
-{
- return 0;
-}
-
-
-/*
- * Get <addr,port> from the string "xxx.xxx.xxx.xxx,ppp,ppp", started
- * with the "pattern" and terminated with the "term" character.
- * <addr,port> is in network order.
- */
-static int ip_vs_ftp_get_addrport(char *data, char *data_limit,
- const char *pattern, size_t plen, char term,
- __be32 *addr, __be16 *port,
- char **start, char **end)
-{
- unsigned char p[6];
- int i = 0;
-
- if (data_limit - data < plen) {
- /* check if there is partial match */
- if (strnicmp(data, pattern, data_limit - data) == 0)
- return -1;
- else
- return 0;
- }
-
- if (strnicmp(data, pattern, plen) != 0) {
- return 0;
- }
- *start = data + plen;
-
- for (data = *start; *data != term; data++) {
- if (data == data_limit)
- return -1;
- }
- *end = data;
-
- memset(p, 0, sizeof(p));
- for (data = *start; data != *end; data++) {
- if (*data >= '0' && *data <= '9') {
- p[i] = p[i]*10 + *data - '0';
- } else if (*data == ',' && i < 5) {
- i++;
- } else {
- /* unexpected character */
- return -1;
- }
- }
-
- if (i != 5)
- return -1;
-
- *addr = get_unaligned((__be32 *)p);
- *port = get_unaligned((__be16 *)(p + 4));
- return 1;
-}
-
-
-/*
- * Look at outgoing ftp packets to catch the response to a PASV command
- * from the server (inside-to-outside).
- * When we see one, we build a connection entry with the client address,
- * client port 0 (unknown at the moment), the server address and the
- * server port. Mark the current connection entry as a control channel
- * of the new entry. All this work is just to make the data connection
- * can be scheduled to the right server later.
- *
- * The outgoing packet should be something like
- * "227 Entering Passive Mode (xxx,xxx,xxx,xxx,ppp,ppp)".
- * xxx,xxx,xxx,xxx is the server address, ppp,ppp is the server port number.
- */
-static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
- struct sk_buff *skb, int *diff)
-{
- struct iphdr *iph;
- struct tcphdr *th;
- char *data, *data_limit;
- char *start, *end;
- __be32 from;
- __be16 port;
- struct ip_vs_conn *n_cp;
- char buf[24]; /* xxx.xxx.xxx.xxx,ppp,ppp\000 */
- unsigned buf_len;
- int ret;
-
- *diff = 0;
-
- /* Only useful for established sessions */
- if (cp->state != IP_VS_TCP_S_ESTABLISHED)
- return 1;
-
- /* Linear packets are much easier to deal with. */
- if (!skb_make_writable(skb, skb->len))
- return 0;
-
- if (cp->app_data == &ip_vs_ftp_pasv) {
- iph = ip_hdr(skb);
- th = (struct tcphdr *)&(((char *)iph)[iph->ihl*4]);
- data = (char *)th + (th->doff << 2);
- data_limit = skb_tail_pointer(skb);
-
- if (ip_vs_ftp_get_addrport(data, data_limit,
- SERVER_STRING,
- sizeof(SERVER_STRING)-1, ')',
- &from, &port,
- &start, &end) != 1)
- return 1;
-
- IP_VS_DBG(7, "PASV response (%u.%u.%u.%u:%d) -> "
- "%u.%u.%u.%u:%d detected\n",
- NIPQUAD(from), ntohs(port), NIPQUAD(cp->caddr), 0);
-
- /*
- * Now update or create an connection entry for it
- */
- n_cp = ip_vs_conn_out_get(iph->protocol, from, port,
- cp->caddr, 0);
- if (!n_cp) {
- n_cp = ip_vs_conn_new(IPPROTO_TCP,
- cp->caddr, 0,
- cp->vaddr, port,
- from, port,
- IP_VS_CONN_F_NO_CPORT,
- cp->dest);
- if (!n_cp)
- return 0;
-
- /* add its controller */
- ip_vs_control_add(n_cp, cp);
- }
-
- /*
- * Replace the old passive address with the new one
- */
- from = n_cp->vaddr;
- port = n_cp->vport;
- sprintf(buf,"%d,%d,%d,%d,%d,%d", NIPQUAD(from),
- (ntohs(port)>>8)&255, ntohs(port)&255);
- buf_len = strlen(buf);
-
- /*
- * Calculate required delta-offset to keep TCP happy
- */
- *diff = buf_len - (end-start);
-
- if (*diff == 0) {
- /* simply replace it with new passive address */
- memcpy(start, buf, buf_len);
- ret = 1;
- } else {
- ret = !ip_vs_skb_replace(skb, GFP_ATOMIC, start,
- end-start, buf, buf_len);
- }
-
- cp->app_data = NULL;
- ip_vs_tcp_conn_listen(n_cp);
- ip_vs_conn_put(n_cp);
- return ret;
- }
- return 1;
-}
-
-
-/*
- * Look at incoming ftp packets to catch the PASV/PORT command
- * (outside-to-inside).
- *
- * The incoming packet having the PORT command should be something like
- * "PORT xxx,xxx,xxx,xxx,ppp,ppp\n".
- * xxx,xxx,xxx,xxx is the client address, ppp,ppp is the client port number.
- * In this case, we create a connection entry using the client address and
- * port, so that the active ftp data connection from the server can reach
- * the client.
- */
-static int ip_vs_ftp_in(struct ip_vs_app *app, struct ip_vs_conn *cp,
- struct sk_buff *skb, int *diff)
-{
- struct iphdr *iph;
- struct tcphdr *th;
- char *data, *data_start, *data_limit;
- char *start, *end;
- __be32 to;
- __be16 port;
- struct ip_vs_conn *n_cp;
-
- /* no diff required for incoming packets */
- *diff = 0;
-
- /* Only useful for established sessions */
- if (cp->state != IP_VS_TCP_S_ESTABLISHED)
- return 1;
-
- /* Linear packets are much easier to deal with. */
- if (!skb_make_writable(skb, skb->len))
- return 0;
-
- /*
- * Detecting whether it is passive
- */
- iph = ip_hdr(skb);
- th = (struct tcphdr *)&(((char *)iph)[iph->ihl*4]);
-
- /* Since there may be OPTIONS in the TCP packet and the HLEN is
- the length of the header in 32-bit multiples, it is accurate
- to calculate data address by th+HLEN*4 */
- data = data_start = (char *)th + (th->doff << 2);
- data_limit = skb_tail_pointer(skb);
-
- while (data <= data_limit - 6) {
- if (strnicmp(data, "PASV\r\n", 6) == 0) {
- /* Passive mode on */
- IP_VS_DBG(7, "got PASV at %td of %td\n",
- data - data_start,
- data_limit - data_start);
- cp->app_data = &ip_vs_ftp_pasv;
- return 1;
- }
- data++;
- }
-
- /*
- * To support virtual FTP server, the scenerio is as follows:
- * FTP client ----> Load Balancer ----> FTP server
- * First detect the port number in the application data,
- * then create a new connection entry for the coming data
- * connection.
- */
- if (ip_vs_ftp_get_addrport(data_start, data_limit,
- CLIENT_STRING, sizeof(CLIENT_STRING)-1,
- '\r', &to, &port,
- &start, &end) != 1)
- return 1;
-
- IP_VS_DBG(7, "PORT %u.%u.%u.%u:%d detected\n",
- NIPQUAD(to), ntohs(port));
-
- /* Passive mode off */
- cp->app_data = NULL;
-
- /*
- * Now update or create a connection entry for it
- */
- IP_VS_DBG(7, "protocol %s %u.%u.%u.%u:%d %u.%u.%u.%u:%d\n",
- ip_vs_proto_name(iph->protocol),
- NIPQUAD(to), ntohs(port), NIPQUAD(cp->vaddr), 0);
-
- n_cp = ip_vs_conn_in_get(iph->protocol,
- to, port,
- cp->vaddr, htons(ntohs(cp->vport)-1));
- if (!n_cp) {
- n_cp = ip_vs_conn_new(IPPROTO_TCP,
- to, port,
- cp->vaddr, htons(ntohs(cp->vport)-1),
- cp->daddr, htons(ntohs(cp->dport)-1),
- 0,
- cp->dest);
- if (!n_cp)
- return 0;
-
- /* add its controller */
- ip_vs_control_add(n_cp, cp);
- }
-
- /*
- * Move tunnel to listen state
- */
- ip_vs_tcp_conn_listen(n_cp);
- ip_vs_conn_put(n_cp);
-
- return 1;
-}
-
-
-static struct ip_vs_app ip_vs_ftp = {
- .name = "ftp",
- .type = IP_VS_APP_TYPE_FTP,
- .protocol = IPPROTO_TCP,
- .module = THIS_MODULE,
- .incs_list = LIST_HEAD_INIT(ip_vs_ftp.incs_list),
- .init_conn = ip_vs_ftp_init_conn,
- .done_conn = ip_vs_ftp_done_conn,
- .bind_conn = NULL,
- .unbind_conn = NULL,
- .pkt_out = ip_vs_ftp_out,
- .pkt_in = ip_vs_ftp_in,
-};
-
-
-/*
- * ip_vs_ftp initialization
- */
-static int __init ip_vs_ftp_init(void)
-{
- int i, ret;
- struct ip_vs_app *app = &ip_vs_ftp;
-
- ret = register_ip_vs_app(app);
- if (ret)
- return ret;
-
- for (i=0; i<IP_VS_APP_MAX_PORTS; i++) {
- if (!ports[i])
- continue;
- ret = register_ip_vs_app_inc(app, app->protocol, ports[i]);
- if (ret)
- break;
- IP_VS_INFO("%s: loaded support on port[%d] = %d\n",
- app->name, i, ports[i]);
- }
-
- if (ret)
- unregister_ip_vs_app(app);
-
- return ret;
-}
-
-
-/*
- * ip_vs_ftp finish.
- */
-static void __exit ip_vs_ftp_exit(void)
-{
- unregister_ip_vs_app(&ip_vs_ftp);
-}
-
-
-module_init(ip_vs_ftp_init);
-module_exit(ip_vs_ftp_exit);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_lblc.c b/net/ipv4/ipvs/ip_vs_lblc.c
deleted file mode 100644
index 7a6a319f544..00000000000
--- a/net/ipv4/ipvs/ip_vs_lblc.c
+++ /dev/null
@@ -1,571 +0,0 @@
-/*
- * IPVS: Locality-Based Least-Connection scheduling module
- *
- * Authors: Wensong Zhang <wensong@gnuchina.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Martin Hamilton : fixed the terrible locking bugs
- * *lock(tbl->lock) ==> *lock(&tbl->lock)
- * Wensong Zhang : fixed the uninitilized tbl->lock bug
- * Wensong Zhang : added doing full expiration check to
- * collect stale entries of 24+ hours when
- * no partial expire check in a half hour
- * Julian Anastasov : replaced del_timer call with del_timer_sync
- * to avoid the possible race between timer
- * handler and del_timer thread in SMP
- *
- */
-
-/*
- * The lblc algorithm is as follows (pseudo code):
- *
- * if cachenode[dest_ip] is null then
- * n, cachenode[dest_ip] <- {weighted least-conn node};
- * else
- * n <- cachenode[dest_ip];
- * if (n is dead) OR
- * (n.conns>n.weight AND
- * there is a node m with m.conns<m.weight/2) then
- * n, cachenode[dest_ip] <- {weighted least-conn node};
- *
- * return n;
- *
- * Thanks must go to Wenzhuo Zhang for talking WCCP to me and pushing
- * me to write this module.
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/jiffies.h>
-
-/* for sysctl */
-#include <linux/fs.h>
-#include <linux/sysctl.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * It is for garbage collection of stale IPVS lblc entries,
- * when the table is full.
- */
-#define CHECK_EXPIRE_INTERVAL (60*HZ)
-#define ENTRY_TIMEOUT (6*60*HZ)
-
-/*
- * It is for full expiration check.
- * When there is no partial expiration check (garbage collection)
- * in a half hour, do a full expiration check to collect stale
- * entries that haven't been touched for a day.
- */
-#define COUNT_FOR_FULL_EXPIRATION 30
-static int sysctl_ip_vs_lblc_expiration = 24*60*60*HZ;
-
-
-/*
- * for IPVS lblc entry hash table
- */
-#ifndef CONFIG_IP_VS_LBLC_TAB_BITS
-#define CONFIG_IP_VS_LBLC_TAB_BITS 10
-#endif
-#define IP_VS_LBLC_TAB_BITS CONFIG_IP_VS_LBLC_TAB_BITS
-#define IP_VS_LBLC_TAB_SIZE (1 << IP_VS_LBLC_TAB_BITS)
-#define IP_VS_LBLC_TAB_MASK (IP_VS_LBLC_TAB_SIZE - 1)
-
-
-/*
- * IPVS lblc entry represents an association between destination
- * IP address and its destination server
- */
-struct ip_vs_lblc_entry {
- struct list_head list;
- __be32 addr; /* destination IP address */
- struct ip_vs_dest *dest; /* real server (cache) */
- unsigned long lastuse; /* last used time */
-};
-
-
-/*
- * IPVS lblc hash table
- */
-struct ip_vs_lblc_table {
- rwlock_t lock; /* lock for this table */
- struct list_head bucket[IP_VS_LBLC_TAB_SIZE]; /* hash bucket */
- atomic_t entries; /* number of entries */
- int max_size; /* maximum size of entries */
- struct timer_list periodic_timer; /* collect stale entries */
- int rover; /* rover for expire check */
- int counter; /* counter for no expire */
-};
-
-
-/*
- * IPVS LBLC sysctl table
- */
-
-static ctl_table vs_vars_table[] = {
- {
- .procname = "lblc_expiration",
- .data = &sysctl_ip_vs_lblc_expiration,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- { .ctl_name = 0 }
-};
-
-static struct ctl_table_header * sysctl_header;
-
-/*
- * new/free a ip_vs_lblc_entry, which is a mapping of a destionation
- * IP address to a server.
- */
-static inline struct ip_vs_lblc_entry *
-ip_vs_lblc_new(__be32 daddr, struct ip_vs_dest *dest)
-{
- struct ip_vs_lblc_entry *en;
-
- en = kmalloc(sizeof(struct ip_vs_lblc_entry), GFP_ATOMIC);
- if (en == NULL) {
- IP_VS_ERR("ip_vs_lblc_new(): no memory\n");
- return NULL;
- }
-
- INIT_LIST_HEAD(&en->list);
- en->addr = daddr;
-
- atomic_inc(&dest->refcnt);
- en->dest = dest;
-
- return en;
-}
-
-
-static inline void ip_vs_lblc_free(struct ip_vs_lblc_entry *en)
-{
- list_del(&en->list);
- /*
- * We don't kfree dest because it is refered either by its service
- * or the trash dest list.
- */
- atomic_dec(&en->dest->refcnt);
- kfree(en);
-}
-
-
-/*
- * Returns hash value for IPVS LBLC entry
- */
-static inline unsigned ip_vs_lblc_hashkey(__be32 addr)
-{
- return (ntohl(addr)*2654435761UL) & IP_VS_LBLC_TAB_MASK;
-}
-
-
-/*
- * Hash an entry in the ip_vs_lblc_table.
- * returns bool success.
- */
-static int
-ip_vs_lblc_hash(struct ip_vs_lblc_table *tbl, struct ip_vs_lblc_entry *en)
-{
- unsigned hash;
-
- if (!list_empty(&en->list)) {
- IP_VS_ERR("ip_vs_lblc_hash(): request for already hashed, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- /*
- * Hash by destination IP address
- */
- hash = ip_vs_lblc_hashkey(en->addr);
-
- write_lock(&tbl->lock);
- list_add(&en->list, &tbl->bucket[hash]);
- atomic_inc(&tbl->entries);
- write_unlock(&tbl->lock);
-
- return 1;
-}
-
-
-/*
- * Get ip_vs_lblc_entry associated with supplied parameters.
- */
-static inline struct ip_vs_lblc_entry *
-ip_vs_lblc_get(struct ip_vs_lblc_table *tbl, __be32 addr)
-{
- unsigned hash;
- struct ip_vs_lblc_entry *en;
-
- hash = ip_vs_lblc_hashkey(addr);
-
- read_lock(&tbl->lock);
-
- list_for_each_entry(en, &tbl->bucket[hash], list) {
- if (en->addr == addr) {
- /* HIT */
- read_unlock(&tbl->lock);
- return en;
- }
- }
-
- read_unlock(&tbl->lock);
-
- return NULL;
-}
-
-
-/*
- * Flush all the entries of the specified table.
- */
-static void ip_vs_lblc_flush(struct ip_vs_lblc_table *tbl)
-{
- int i;
- struct ip_vs_lblc_entry *en, *nxt;
-
- for (i=0; i<IP_VS_LBLC_TAB_SIZE; i++) {
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[i], list) {
- ip_vs_lblc_free(en);
- atomic_dec(&tbl->entries);
- }
- write_unlock(&tbl->lock);
- }
-}
-
-
-static inline void ip_vs_lblc_full_check(struct ip_vs_lblc_table *tbl)
-{
- unsigned long now = jiffies;
- int i, j;
- struct ip_vs_lblc_entry *en, *nxt;
-
- for (i=0, j=tbl->rover; i<IP_VS_LBLC_TAB_SIZE; i++) {
- j = (j + 1) & IP_VS_LBLC_TAB_MASK;
-
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
- if (time_before(now,
- en->lastuse + sysctl_ip_vs_lblc_expiration))
- continue;
-
- ip_vs_lblc_free(en);
- atomic_dec(&tbl->entries);
- }
- write_unlock(&tbl->lock);
- }
- tbl->rover = j;
-}
-
-
-/*
- * Periodical timer handler for IPVS lblc table
- * It is used to collect stale entries when the number of entries
- * exceeds the maximum size of the table.
- *
- * Fixme: we probably need more complicated algorithm to collect
- * entries that have not been used for a long time even
- * if the number of entries doesn't exceed the maximum size
- * of the table.
- * The full expiration check is for this purpose now.
- */
-static void ip_vs_lblc_check_expire(unsigned long data)
-{
- struct ip_vs_lblc_table *tbl;
- unsigned long now = jiffies;
- int goal;
- int i, j;
- struct ip_vs_lblc_entry *en, *nxt;
-
- tbl = (struct ip_vs_lblc_table *)data;
-
- if ((tbl->counter % COUNT_FOR_FULL_EXPIRATION) == 0) {
- /* do full expiration check */
- ip_vs_lblc_full_check(tbl);
- tbl->counter = 1;
- goto out;
- }
-
- if (atomic_read(&tbl->entries) <= tbl->max_size) {
- tbl->counter++;
- goto out;
- }
-
- goal = (atomic_read(&tbl->entries) - tbl->max_size)*4/3;
- if (goal > tbl->max_size/2)
- goal = tbl->max_size/2;
-
- for (i=0, j=tbl->rover; i<IP_VS_LBLC_TAB_SIZE; i++) {
- j = (j + 1) & IP_VS_LBLC_TAB_MASK;
-
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
- if (time_before(now, en->lastuse + ENTRY_TIMEOUT))
- continue;
-
- ip_vs_lblc_free(en);
- atomic_dec(&tbl->entries);
- goal--;
- }
- write_unlock(&tbl->lock);
- if (goal <= 0)
- break;
- }
- tbl->rover = j;
-
- out:
- mod_timer(&tbl->periodic_timer, jiffies+CHECK_EXPIRE_INTERVAL);
-}
-
-
-static int ip_vs_lblc_init_svc(struct ip_vs_service *svc)
-{
- int i;
- struct ip_vs_lblc_table *tbl;
-
- /*
- * Allocate the ip_vs_lblc_table for this service
- */
- tbl = kmalloc(sizeof(struct ip_vs_lblc_table), GFP_ATOMIC);
- if (tbl == NULL) {
- IP_VS_ERR("ip_vs_lblc_init_svc(): no memory\n");
- return -ENOMEM;
- }
- svc->sched_data = tbl;
- IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) allocated for "
- "current service\n",
- sizeof(struct ip_vs_lblc_table));
-
- /*
- * Initialize the hash buckets
- */
- for (i=0; i<IP_VS_LBLC_TAB_SIZE; i++) {
- INIT_LIST_HEAD(&tbl->bucket[i]);
- }
- rwlock_init(&tbl->lock);
- tbl->max_size = IP_VS_LBLC_TAB_SIZE*16;
- tbl->rover = 0;
- tbl->counter = 1;
-
- /*
- * Hook periodic timer for garbage collection
- */
- setup_timer(&tbl->periodic_timer, ip_vs_lblc_check_expire,
- (unsigned long)tbl);
- tbl->periodic_timer.expires = jiffies+CHECK_EXPIRE_INTERVAL;
- add_timer(&tbl->periodic_timer);
-
- return 0;
-}
-
-
-static int ip_vs_lblc_done_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_lblc_table *tbl = svc->sched_data;
-
- /* remove periodic timer */
- del_timer_sync(&tbl->periodic_timer);
-
- /* got to clean up table entries here */
- ip_vs_lblc_flush(tbl);
-
- /* release the table itself */
- kfree(svc->sched_data);
- IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) released\n",
- sizeof(struct ip_vs_lblc_table));
-
- return 0;
-}
-
-
-static int ip_vs_lblc_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline struct ip_vs_dest *
-__ip_vs_wlc_schedule(struct ip_vs_service *svc, struct iphdr *iph)
-{
- struct ip_vs_dest *dest, *least;
- int loh, doh;
-
- /*
- * We think the overhead of processing active connections is fifty
- * times higher than that of inactive connections in average. (This
- * fifty times might not be accurate, we will change it later.) We
- * use the following formula to estimate the overhead:
- * dest->activeconns*50 + dest->inactconns
- * and the load:
- * (dest overhead) / dest->weight
- *
- * Remember -- no floats in kernel mode!!!
- * The comparison of h1*w2 > h2*w1 is equivalent to that of
- * h1/w1 > h2/w2
- * if every weight is larger than zero.
- *
- * The server with weight=0 is quiesced and will not receive any
- * new connection.
- */
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
- if (atomic_read(&dest->weight) > 0) {
- least = dest;
- loh = atomic_read(&least->activeconns) * 50
- + atomic_read(&least->inactconns);
- goto nextstage;
- }
- }
- return NULL;
-
- /*
- * Find the destination with the least load.
- */
- nextstage:
- list_for_each_entry_continue(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
-
- doh = atomic_read(&dest->activeconns) * 50
- + atomic_read(&dest->inactconns);
- if (loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight)) {
- least = dest;
- loh = doh;
- }
- }
-
- IP_VS_DBG(6, "LBLC: server %d.%d.%d.%d:%d "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
-
- return least;
-}
-
-
-/*
- * If this destination server is overloaded and there is a less loaded
- * server, then return true.
- */
-static inline int
-is_overloaded(struct ip_vs_dest *dest, struct ip_vs_service *svc)
-{
- if (atomic_read(&dest->activeconns) > atomic_read(&dest->weight)) {
- struct ip_vs_dest *d;
-
- list_for_each_entry(d, &svc->destinations, n_list) {
- if (atomic_read(&d->activeconns)*2
- < atomic_read(&d->weight)) {
- return 1;
- }
- }
- }
- return 0;
-}
-
-
-/*
- * Locality-Based (weighted) Least-Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_lblc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_lblc_table *tbl;
- struct ip_vs_lblc_entry *en;
- struct iphdr *iph = ip_hdr(skb);
-
- IP_VS_DBG(6, "ip_vs_lblc_schedule(): Scheduling...\n");
-
- tbl = (struct ip_vs_lblc_table *)svc->sched_data;
- en = ip_vs_lblc_get(tbl, iph->daddr);
- if (en == NULL) {
- dest = __ip_vs_wlc_schedule(svc, iph);
- if (dest == NULL) {
- IP_VS_DBG(1, "no destination available\n");
- return NULL;
- }
- en = ip_vs_lblc_new(iph->daddr, dest);
- if (en == NULL) {
- return NULL;
- }
- ip_vs_lblc_hash(tbl, en);
- } else {
- dest = en->dest;
- if (!(dest->flags & IP_VS_DEST_F_AVAILABLE)
- || atomic_read(&dest->weight) <= 0
- || is_overloaded(dest, svc)) {
- dest = __ip_vs_wlc_schedule(svc, iph);
- if (dest == NULL) {
- IP_VS_DBG(1, "no destination available\n");
- return NULL;
- }
- atomic_dec(&en->dest->refcnt);
- atomic_inc(&dest->refcnt);
- en->dest = dest;
- }
- }
- en->lastuse = jiffies;
-
- IP_VS_DBG(6, "LBLC: destination IP address %u.%u.%u.%u "
- "--> server %u.%u.%u.%u:%d\n",
- NIPQUAD(en->addr),
- NIPQUAD(dest->addr),
- ntohs(dest->port));
-
- return dest;
-}
-
-
-/*
- * IPVS LBLC Scheduler structure
- */
-static struct ip_vs_scheduler ip_vs_lblc_scheduler =
-{
- .name = "lblc",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_lblc_scheduler.n_list),
- .init_service = ip_vs_lblc_init_svc,
- .done_service = ip_vs_lblc_done_svc,
- .update_service = ip_vs_lblc_update_svc,
- .schedule = ip_vs_lblc_schedule,
-};
-
-
-static int __init ip_vs_lblc_init(void)
-{
- int ret;
-
- sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars_table);
- ret = register_ip_vs_scheduler(&ip_vs_lblc_scheduler);
- if (ret)
- unregister_sysctl_table(sysctl_header);
- return ret;
-}
-
-
-static void __exit ip_vs_lblc_cleanup(void)
-{
- unregister_sysctl_table(sysctl_header);
- unregister_ip_vs_scheduler(&ip_vs_lblc_scheduler);
-}
-
-
-module_init(ip_vs_lblc_init);
-module_exit(ip_vs_lblc_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_lblcr.c b/net/ipv4/ipvs/ip_vs_lblcr.c
deleted file mode 100644
index c234e73968a..00000000000
--- a/net/ipv4/ipvs/ip_vs_lblcr.c
+++ /dev/null
@@ -1,760 +0,0 @@
-/*
- * IPVS: Locality-Based Least-Connection with Replication scheduler
- *
- * Authors: Wensong Zhang <wensong@gnuchina.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Julian Anastasov : Added the missing (dest->weight>0)
- * condition in the ip_vs_dest_set_max.
- *
- */
-
-/*
- * The lblc/r algorithm is as follows (pseudo code):
- *
- * if serverSet[dest_ip] is null then
- * n, serverSet[dest_ip] <- {weighted least-conn node};
- * else
- * n <- {least-conn (alive) node in serverSet[dest_ip]};
- * if (n is null) OR
- * (n.conns>n.weight AND
- * there is a node m with m.conns<m.weight/2) then
- * n <- {weighted least-conn node};
- * add n to serverSet[dest_ip];
- * if |serverSet[dest_ip]| > 1 AND
- * now - serverSet[dest_ip].lastMod > T then
- * m <- {most conn node in serverSet[dest_ip]};
- * remove m from serverSet[dest_ip];
- * if serverSet[dest_ip] changed then
- * serverSet[dest_ip].lastMod <- now;
- *
- * return n;
- *
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/jiffies.h>
-
-/* for sysctl */
-#include <linux/fs.h>
-#include <linux/sysctl.h>
-#include <net/net_namespace.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * It is for garbage collection of stale IPVS lblcr entries,
- * when the table is full.
- */
-#define CHECK_EXPIRE_INTERVAL (60*HZ)
-#define ENTRY_TIMEOUT (6*60*HZ)
-
-/*
- * It is for full expiration check.
- * When there is no partial expiration check (garbage collection)
- * in a half hour, do a full expiration check to collect stale
- * entries that haven't been touched for a day.
- */
-#define COUNT_FOR_FULL_EXPIRATION 30
-static int sysctl_ip_vs_lblcr_expiration = 24*60*60*HZ;
-
-
-/*
- * for IPVS lblcr entry hash table
- */
-#ifndef CONFIG_IP_VS_LBLCR_TAB_BITS
-#define CONFIG_IP_VS_LBLCR_TAB_BITS 10
-#endif
-#define IP_VS_LBLCR_TAB_BITS CONFIG_IP_VS_LBLCR_TAB_BITS
-#define IP_VS_LBLCR_TAB_SIZE (1 << IP_VS_LBLCR_TAB_BITS)
-#define IP_VS_LBLCR_TAB_MASK (IP_VS_LBLCR_TAB_SIZE - 1)
-
-
-/*
- * IPVS destination set structure and operations
- */
-struct ip_vs_dest_list {
- struct ip_vs_dest_list *next; /* list link */
- struct ip_vs_dest *dest; /* destination server */
-};
-
-struct ip_vs_dest_set {
- atomic_t size; /* set size */
- unsigned long lastmod; /* last modified time */
- struct ip_vs_dest_list *list; /* destination list */
- rwlock_t lock; /* lock for this list */
-};
-
-
-static struct ip_vs_dest_list *
-ip_vs_dest_set_insert(struct ip_vs_dest_set *set, struct ip_vs_dest *dest)
-{
- struct ip_vs_dest_list *e;
-
- for (e=set->list; e!=NULL; e=e->next) {
- if (e->dest == dest)
- /* already existed */
- return NULL;
- }
-
- e = kmalloc(sizeof(struct ip_vs_dest_list), GFP_ATOMIC);
- if (e == NULL) {
- IP_VS_ERR("ip_vs_dest_set_insert(): no memory\n");
- return NULL;
- }
-
- atomic_inc(&dest->refcnt);
- e->dest = dest;
-
- /* link it to the list */
- write_lock(&set->lock);
- e->next = set->list;
- set->list = e;
- atomic_inc(&set->size);
- write_unlock(&set->lock);
-
- set->lastmod = jiffies;
- return e;
-}
-
-static void
-ip_vs_dest_set_erase(struct ip_vs_dest_set *set, struct ip_vs_dest *dest)
-{
- struct ip_vs_dest_list *e, **ep;
-
- write_lock(&set->lock);
- for (ep=&set->list, e=*ep; e!=NULL; e=*ep) {
- if (e->dest == dest) {
- /* HIT */
- *ep = e->next;
- atomic_dec(&set->size);
- set->lastmod = jiffies;
- atomic_dec(&e->dest->refcnt);
- kfree(e);
- break;
- }
- ep = &e->next;
- }
- write_unlock(&set->lock);
-}
-
-static void ip_vs_dest_set_eraseall(struct ip_vs_dest_set *set)
-{
- struct ip_vs_dest_list *e, **ep;
-
- write_lock(&set->lock);
- for (ep=&set->list, e=*ep; e!=NULL; e=*ep) {
- *ep = e->next;
- /*
- * We don't kfree dest because it is refered either
- * by its service or by the trash dest list.
- */
- atomic_dec(&e->dest->refcnt);
- kfree(e);
- }
- write_unlock(&set->lock);
-}
-
-/* get weighted least-connection node in the destination set */
-static inline struct ip_vs_dest *ip_vs_dest_set_min(struct ip_vs_dest_set *set)
-{
- register struct ip_vs_dest_list *e;
- struct ip_vs_dest *dest, *least;
- int loh, doh;
-
- if (set == NULL)
- return NULL;
-
- read_lock(&set->lock);
- /* select the first destination server, whose weight > 0 */
- for (e=set->list; e!=NULL; e=e->next) {
- least = e->dest;
- if (least->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
-
- if ((atomic_read(&least->weight) > 0)
- && (least->flags & IP_VS_DEST_F_AVAILABLE)) {
- loh = atomic_read(&least->activeconns) * 50
- + atomic_read(&least->inactconns);
- goto nextstage;
- }
- }
- read_unlock(&set->lock);
- return NULL;
-
- /* find the destination with the weighted least load */
- nextstage:
- for (e=e->next; e!=NULL; e=e->next) {
- dest = e->dest;
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
-
- doh = atomic_read(&dest->activeconns) * 50
- + atomic_read(&dest->inactconns);
- if ((loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight))
- && (dest->flags & IP_VS_DEST_F_AVAILABLE)) {
- least = dest;
- loh = doh;
- }
- }
- read_unlock(&set->lock);
-
- IP_VS_DBG(6, "ip_vs_dest_set_min: server %d.%d.%d.%d:%d "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
- return least;
-}
-
-
-/* get weighted most-connection node in the destination set */
-static inline struct ip_vs_dest *ip_vs_dest_set_max(struct ip_vs_dest_set *set)
-{
- register struct ip_vs_dest_list *e;
- struct ip_vs_dest *dest, *most;
- int moh, doh;
-
- if (set == NULL)
- return NULL;
-
- read_lock(&set->lock);
- /* select the first destination server, whose weight > 0 */
- for (e=set->list; e!=NULL; e=e->next) {
- most = e->dest;
- if (atomic_read(&most->weight) > 0) {
- moh = atomic_read(&most->activeconns) * 50
- + atomic_read(&most->inactconns);
- goto nextstage;
- }
- }
- read_unlock(&set->lock);
- return NULL;
-
- /* find the destination with the weighted most load */
- nextstage:
- for (e=e->next; e!=NULL; e=e->next) {
- dest = e->dest;
- doh = atomic_read(&dest->activeconns) * 50
- + atomic_read(&dest->inactconns);
- /* moh/mw < doh/dw ==> moh*dw < doh*mw, where mw,dw>0 */
- if ((moh * atomic_read(&dest->weight) <
- doh * atomic_read(&most->weight))
- && (atomic_read(&dest->weight) > 0)) {
- most = dest;
- moh = doh;
- }
- }
- read_unlock(&set->lock);
-
- IP_VS_DBG(6, "ip_vs_dest_set_max: server %d.%d.%d.%d:%d "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(most->addr), ntohs(most->port),
- atomic_read(&most->activeconns),
- atomic_read(&most->refcnt),
- atomic_read(&most->weight), moh);
- return most;
-}
-
-
-/*
- * IPVS lblcr entry represents an association between destination
- * IP address and its destination server set
- */
-struct ip_vs_lblcr_entry {
- struct list_head list;
- __be32 addr; /* destination IP address */
- struct ip_vs_dest_set set; /* destination server set */
- unsigned long lastuse; /* last used time */
-};
-
-
-/*
- * IPVS lblcr hash table
- */
-struct ip_vs_lblcr_table {
- rwlock_t lock; /* lock for this table */
- struct list_head bucket[IP_VS_LBLCR_TAB_SIZE]; /* hash bucket */
- atomic_t entries; /* number of entries */
- int max_size; /* maximum size of entries */
- struct timer_list periodic_timer; /* collect stale entries */
- int rover; /* rover for expire check */
- int counter; /* counter for no expire */
-};
-
-
-/*
- * IPVS LBLCR sysctl table
- */
-
-static ctl_table vs_vars_table[] = {
- {
- .procname = "lblcr_expiration",
- .data = &sysctl_ip_vs_lblcr_expiration,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- { .ctl_name = 0 }
-};
-
-static struct ctl_table_header * sysctl_header;
-
-/*
- * new/free a ip_vs_lblcr_entry, which is a mapping of a destination
- * IP address to a server.
- */
-static inline struct ip_vs_lblcr_entry *ip_vs_lblcr_new(__be32 daddr)
-{
- struct ip_vs_lblcr_entry *en;
-
- en = kmalloc(sizeof(struct ip_vs_lblcr_entry), GFP_ATOMIC);
- if (en == NULL) {
- IP_VS_ERR("ip_vs_lblcr_new(): no memory\n");
- return NULL;
- }
-
- INIT_LIST_HEAD(&en->list);
- en->addr = daddr;
-
- /* initilize its dest set */
- atomic_set(&(en->set.size), 0);
- en->set.list = NULL;
- rwlock_init(&en->set.lock);
-
- return en;
-}
-
-
-static inline void ip_vs_lblcr_free(struct ip_vs_lblcr_entry *en)
-{
- list_del(&en->list);
- ip_vs_dest_set_eraseall(&en->set);
- kfree(en);
-}
-
-
-/*
- * Returns hash value for IPVS LBLCR entry
- */
-static inline unsigned ip_vs_lblcr_hashkey(__be32 addr)
-{
- return (ntohl(addr)*2654435761UL) & IP_VS_LBLCR_TAB_MASK;
-}
-
-
-/*
- * Hash an entry in the ip_vs_lblcr_table.
- * returns bool success.
- */
-static int
-ip_vs_lblcr_hash(struct ip_vs_lblcr_table *tbl, struct ip_vs_lblcr_entry *en)
-{
- unsigned hash;
-
- if (!list_empty(&en->list)) {
- IP_VS_ERR("ip_vs_lblcr_hash(): request for already hashed, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- /*
- * Hash by destination IP address
- */
- hash = ip_vs_lblcr_hashkey(en->addr);
-
- write_lock(&tbl->lock);
- list_add(&en->list, &tbl->bucket[hash]);
- atomic_inc(&tbl->entries);
- write_unlock(&tbl->lock);
-
- return 1;
-}
-
-
-/*
- * Get ip_vs_lblcr_entry associated with supplied parameters.
- */
-static inline struct ip_vs_lblcr_entry *
-ip_vs_lblcr_get(struct ip_vs_lblcr_table *tbl, __be32 addr)
-{
- unsigned hash;
- struct ip_vs_lblcr_entry *en;
-
- hash = ip_vs_lblcr_hashkey(addr);
-
- read_lock(&tbl->lock);
-
- list_for_each_entry(en, &tbl->bucket[hash], list) {
- if (en->addr == addr) {
- /* HIT */
- read_unlock(&tbl->lock);
- return en;
- }
- }
-
- read_unlock(&tbl->lock);
-
- return NULL;
-}
-
-
-/*
- * Flush all the entries of the specified table.
- */
-static void ip_vs_lblcr_flush(struct ip_vs_lblcr_table *tbl)
-{
- int i;
- struct ip_vs_lblcr_entry *en, *nxt;
-
- for (i=0; i<IP_VS_LBLCR_TAB_SIZE; i++) {
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[i], list) {
- ip_vs_lblcr_free(en);
- atomic_dec(&tbl->entries);
- }
- write_unlock(&tbl->lock);
- }
-}
-
-
-static inline void ip_vs_lblcr_full_check(struct ip_vs_lblcr_table *tbl)
-{
- unsigned long now = jiffies;
- int i, j;
- struct ip_vs_lblcr_entry *en, *nxt;
-
- for (i=0, j=tbl->rover; i<IP_VS_LBLCR_TAB_SIZE; i++) {
- j = (j + 1) & IP_VS_LBLCR_TAB_MASK;
-
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
- if (time_after(en->lastuse+sysctl_ip_vs_lblcr_expiration,
- now))
- continue;
-
- ip_vs_lblcr_free(en);
- atomic_dec(&tbl->entries);
- }
- write_unlock(&tbl->lock);
- }
- tbl->rover = j;
-}
-
-
-/*
- * Periodical timer handler for IPVS lblcr table
- * It is used to collect stale entries when the number of entries
- * exceeds the maximum size of the table.
- *
- * Fixme: we probably need more complicated algorithm to collect
- * entries that have not been used for a long time even
- * if the number of entries doesn't exceed the maximum size
- * of the table.
- * The full expiration check is for this purpose now.
- */
-static void ip_vs_lblcr_check_expire(unsigned long data)
-{
- struct ip_vs_lblcr_table *tbl;
- unsigned long now = jiffies;
- int goal;
- int i, j;
- struct ip_vs_lblcr_entry *en, *nxt;
-
- tbl = (struct ip_vs_lblcr_table *)data;
-
- if ((tbl->counter % COUNT_FOR_FULL_EXPIRATION) == 0) {
- /* do full expiration check */
- ip_vs_lblcr_full_check(tbl);
- tbl->counter = 1;
- goto out;
- }
-
- if (atomic_read(&tbl->entries) <= tbl->max_size) {
- tbl->counter++;
- goto out;
- }
-
- goal = (atomic_read(&tbl->entries) - tbl->max_size)*4/3;
- if (goal > tbl->max_size/2)
- goal = tbl->max_size/2;
-
- for (i=0, j=tbl->rover; i<IP_VS_LBLCR_TAB_SIZE; i++) {
- j = (j + 1) & IP_VS_LBLCR_TAB_MASK;
-
- write_lock(&tbl->lock);
- list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
- if (time_before(now, en->lastuse+ENTRY_TIMEOUT))
- continue;
-
- ip_vs_lblcr_free(en);
- atomic_dec(&tbl->entries);
- goal--;
- }
- write_unlock(&tbl->lock);
- if (goal <= 0)
- break;
- }
- tbl->rover = j;
-
- out:
- mod_timer(&tbl->periodic_timer, jiffies+CHECK_EXPIRE_INTERVAL);
-}
-
-static int ip_vs_lblcr_init_svc(struct ip_vs_service *svc)
-{
- int i;
- struct ip_vs_lblcr_table *tbl;
-
- /*
- * Allocate the ip_vs_lblcr_table for this service
- */
- tbl = kmalloc(sizeof(struct ip_vs_lblcr_table), GFP_ATOMIC);
- if (tbl == NULL) {
- IP_VS_ERR("ip_vs_lblcr_init_svc(): no memory\n");
- return -ENOMEM;
- }
- svc->sched_data = tbl;
- IP_VS_DBG(6, "LBLCR hash table (memory=%Zdbytes) allocated for "
- "current service\n",
- sizeof(struct ip_vs_lblcr_table));
-
- /*
- * Initialize the hash buckets
- */
- for (i=0; i<IP_VS_LBLCR_TAB_SIZE; i++) {
- INIT_LIST_HEAD(&tbl->bucket[i]);
- }
- rwlock_init(&tbl->lock);
- tbl->max_size = IP_VS_LBLCR_TAB_SIZE*16;
- tbl->rover = 0;
- tbl->counter = 1;
-
- /*
- * Hook periodic timer for garbage collection
- */
- setup_timer(&tbl->periodic_timer, ip_vs_lblcr_check_expire,
- (unsigned long)tbl);
- tbl->periodic_timer.expires = jiffies+CHECK_EXPIRE_INTERVAL;
- add_timer(&tbl->periodic_timer);
-
- return 0;
-}
-
-
-static int ip_vs_lblcr_done_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_lblcr_table *tbl = svc->sched_data;
-
- /* remove periodic timer */
- del_timer_sync(&tbl->periodic_timer);
-
- /* got to clean up table entries here */
- ip_vs_lblcr_flush(tbl);
-
- /* release the table itself */
- kfree(svc->sched_data);
- IP_VS_DBG(6, "LBLCR hash table (memory=%Zdbytes) released\n",
- sizeof(struct ip_vs_lblcr_table));
-
- return 0;
-}
-
-
-static int ip_vs_lblcr_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline struct ip_vs_dest *
-__ip_vs_wlc_schedule(struct ip_vs_service *svc, struct iphdr *iph)
-{
- struct ip_vs_dest *dest, *least;
- int loh, doh;
-
- /*
- * We think the overhead of processing active connections is fifty
- * times higher than that of inactive connections in average. (This
- * fifty times might not be accurate, we will change it later.) We
- * use the following formula to estimate the overhead:
- * dest->activeconns*50 + dest->inactconns
- * and the load:
- * (dest overhead) / dest->weight
- *
- * Remember -- no floats in kernel mode!!!
- * The comparison of h1*w2 > h2*w1 is equivalent to that of
- * h1/w1 > h2/w2
- * if every weight is larger than zero.
- *
- * The server with weight=0 is quiesced and will not receive any
- * new connection.
- */
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
-
- if (atomic_read(&dest->weight) > 0) {
- least = dest;
- loh = atomic_read(&least->activeconns) * 50
- + atomic_read(&least->inactconns);
- goto nextstage;
- }
- }
- return NULL;
-
- /*
- * Find the destination with the least load.
- */
- nextstage:
- list_for_each_entry_continue(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
-
- doh = atomic_read(&dest->activeconns) * 50
- + atomic_read(&dest->inactconns);
- if (loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight)) {
- least = dest;
- loh = doh;
- }
- }
-
- IP_VS_DBG(6, "LBLCR: server %d.%d.%d.%d:%d "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
-
- return least;
-}
-
-
-/*
- * If this destination server is overloaded and there is a less loaded
- * server, then return true.
- */
-static inline int
-is_overloaded(struct ip_vs_dest *dest, struct ip_vs_service *svc)
-{
- if (atomic_read(&dest->activeconns) > atomic_read(&dest->weight)) {
- struct ip_vs_dest *d;
-
- list_for_each_entry(d, &svc->destinations, n_list) {
- if (atomic_read(&d->activeconns)*2
- < atomic_read(&d->weight)) {
- return 1;
- }
- }
- }
- return 0;
-}
-
-
-/*
- * Locality-Based (weighted) Least-Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_lblcr_table *tbl;
- struct ip_vs_lblcr_entry *en;
- struct iphdr *iph = ip_hdr(skb);
-
- IP_VS_DBG(6, "ip_vs_lblcr_schedule(): Scheduling...\n");
-
- tbl = (struct ip_vs_lblcr_table *)svc->sched_data;
- en = ip_vs_lblcr_get(tbl, iph->daddr);
- if (en == NULL) {
- dest = __ip_vs_wlc_schedule(svc, iph);
- if (dest == NULL) {
- IP_VS_DBG(1, "no destination available\n");
- return NULL;
- }
- en = ip_vs_lblcr_new(iph->daddr);
- if (en == NULL) {
- return NULL;
- }
- ip_vs_dest_set_insert(&en->set, dest);
- ip_vs_lblcr_hash(tbl, en);
- } else {
- dest = ip_vs_dest_set_min(&en->set);
- if (!dest || is_overloaded(dest, svc)) {
- dest = __ip_vs_wlc_schedule(svc, iph);
- if (dest == NULL) {
- IP_VS_DBG(1, "no destination available\n");
- return NULL;
- }
- ip_vs_dest_set_insert(&en->set, dest);
- }
- if (atomic_read(&en->set.size) > 1 &&
- jiffies-en->set.lastmod > sysctl_ip_vs_lblcr_expiration) {
- struct ip_vs_dest *m;
- m = ip_vs_dest_set_max(&en->set);
- if (m)
- ip_vs_dest_set_erase(&en->set, m);
- }
- }
- en->lastuse = jiffies;
-
- IP_VS_DBG(6, "LBLCR: destination IP address %u.%u.%u.%u "
- "--> server %u.%u.%u.%u:%d\n",
- NIPQUAD(en->addr),
- NIPQUAD(dest->addr),
- ntohs(dest->port));
-
- return dest;
-}
-
-
-/*
- * IPVS LBLCR Scheduler structure
- */
-static struct ip_vs_scheduler ip_vs_lblcr_scheduler =
-{
- .name = "lblcr",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_lblcr_scheduler.n_list),
- .init_service = ip_vs_lblcr_init_svc,
- .done_service = ip_vs_lblcr_done_svc,
- .update_service = ip_vs_lblcr_update_svc,
- .schedule = ip_vs_lblcr_schedule,
-};
-
-
-static int __init ip_vs_lblcr_init(void)
-{
- int ret;
-
- sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars_table);
- ret = register_ip_vs_scheduler(&ip_vs_lblcr_scheduler);
- if (ret)
- unregister_sysctl_table(sysctl_header);
- return ret;
-}
-
-
-static void __exit ip_vs_lblcr_cleanup(void)
-{
- unregister_sysctl_table(sysctl_header);
- unregister_ip_vs_scheduler(&ip_vs_lblcr_scheduler);
-}
-
-
-module_init(ip_vs_lblcr_init);
-module_exit(ip_vs_lblcr_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_lc.c b/net/ipv4/ipvs/ip_vs_lc.c
deleted file mode 100644
index ebcdbf75ac6..00000000000
--- a/net/ipv4/ipvs/ip_vs_lc.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * IPVS: Least-Connection Scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Wensong Zhang : added the ip_vs_lc_update_svc
- * Wensong Zhang : added any dest with weight=0 is quiesced
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static int ip_vs_lc_init_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int ip_vs_lc_done_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int ip_vs_lc_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline unsigned int
-ip_vs_lc_dest_overhead(struct ip_vs_dest *dest)
-{
- /*
- * We think the overhead of processing active connections is 256
- * times higher than that of inactive connections in average. (This
- * 256 times might not be accurate, we will change it later) We
- * use the following formula to estimate the overhead now:
- * dest->activeconns*256 + dest->inactconns
- */
- return (atomic_read(&dest->activeconns) << 8) +
- atomic_read(&dest->inactconns);
-}
-
-
-/*
- * Least Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_lc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest, *least = NULL;
- unsigned int loh = 0, doh;
-
- IP_VS_DBG(6, "ip_vs_lc_schedule(): Scheduling...\n");
-
- /*
- * Simply select the server with the least number of
- * (activeconns<<5) + inactconns
- * Except whose weight is equal to zero.
- * If the weight is equal to zero, it means that the server is
- * quiesced, the existing connections to the server still get
- * served, but no new connection is assigned to the server.
- */
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if ((dest->flags & IP_VS_DEST_F_OVERLOAD) ||
- atomic_read(&dest->weight) == 0)
- continue;
- doh = ip_vs_lc_dest_overhead(dest);
- if (!least || doh < loh) {
- least = dest;
- loh = doh;
- }
- }
-
- if (least)
- IP_VS_DBG(6, "LC: server %u.%u.%u.%u:%u activeconns %d inactconns %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->inactconns));
-
- return least;
-}
-
-
-static struct ip_vs_scheduler ip_vs_lc_scheduler = {
- .name = "lc",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_lc_scheduler.n_list),
- .init_service = ip_vs_lc_init_svc,
- .done_service = ip_vs_lc_done_svc,
- .update_service = ip_vs_lc_update_svc,
- .schedule = ip_vs_lc_schedule,
-};
-
-
-static int __init ip_vs_lc_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_lc_scheduler) ;
-}
-
-static void __exit ip_vs_lc_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_lc_scheduler);
-}
-
-module_init(ip_vs_lc_init);
-module_exit(ip_vs_lc_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_nq.c b/net/ipv4/ipvs/ip_vs_nq.c
deleted file mode 100644
index 92f3a677003..00000000000
--- a/net/ipv4/ipvs/ip_vs_nq.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * IPVS: Never Queue scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-/*
- * The NQ algorithm adopts a two-speed model. When there is an idle server
- * available, the job will be sent to the idle server, instead of waiting
- * for a fast one. When there is no idle server available, the job will be
- * sent to the server that minimize its expected delay (The Shortest
- * Expected Delay scheduling algorithm).
- *
- * See the following paper for more information:
- * A. Weinrib and S. Shenker, Greed is not enough: Adaptive load sharing
- * in large heterogeneous systems. In Proceedings IEEE INFOCOM'88,
- * pages 986-994, 1988.
- *
- * Thanks must go to Marko Buuri <marko@buuri.name> for talking NQ to me.
- *
- * The difference between NQ and SED is that NQ can improve overall
- * system utilization.
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static int
-ip_vs_nq_init_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_nq_done_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_nq_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline unsigned int
-ip_vs_nq_dest_overhead(struct ip_vs_dest *dest)
-{
- /*
- * We only use the active connection number in the cost
- * calculation here.
- */
- return atomic_read(&dest->activeconns) + 1;
-}
-
-
-/*
- * Weighted Least Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_nq_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest, *least = NULL;
- unsigned int loh = 0, doh;
-
- IP_VS_DBG(6, "ip_vs_nq_schedule(): Scheduling...\n");
-
- /*
- * We calculate the load of each dest server as follows:
- * (server expected overhead) / dest->weight
- *
- * Remember -- no floats in kernel mode!!!
- * The comparison of h1*w2 > h2*w1 is equivalent to that of
- * h1/w1 > h2/w2
- * if every weight is larger than zero.
- *
- * The server with weight=0 is quiesced and will not receive any
- * new connections.
- */
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
-
- if (dest->flags & IP_VS_DEST_F_OVERLOAD ||
- !atomic_read(&dest->weight))
- continue;
-
- doh = ip_vs_nq_dest_overhead(dest);
-
- /* return the server directly if it is idle */
- if (atomic_read(&dest->activeconns) == 0) {
- least = dest;
- loh = doh;
- goto out;
- }
-
- if (!least ||
- (loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight))) {
- least = dest;
- loh = doh;
- }
- }
-
- if (!least)
- return NULL;
-
- out:
- IP_VS_DBG(6, "NQ: server %u.%u.%u.%u:%u "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
-
- return least;
-}
-
-
-static struct ip_vs_scheduler ip_vs_nq_scheduler =
-{
- .name = "nq",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_nq_scheduler.n_list),
- .init_service = ip_vs_nq_init_svc,
- .done_service = ip_vs_nq_done_svc,
- .update_service = ip_vs_nq_update_svc,
- .schedule = ip_vs_nq_schedule,
-};
-
-
-static int __init ip_vs_nq_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_nq_scheduler);
-}
-
-static void __exit ip_vs_nq_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_nq_scheduler);
-}
-
-module_init(ip_vs_nq_init);
-module_exit(ip_vs_nq_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_proto.c b/net/ipv4/ipvs/ip_vs_proto.c
deleted file mode 100644
index 6099a88fc20..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * ip_vs_proto.c: transport protocol load balancing support for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <net/protocol.h>
-#include <net/tcp.h>
-#include <net/udp.h>
-#include <asm/system.h>
-#include <linux/stat.h>
-#include <linux/proc_fs.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * IPVS protocols can only be registered/unregistered when the ipvs
- * module is loaded/unloaded, so no lock is needed in accessing the
- * ipvs protocol table.
- */
-
-#define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */
-#define IP_VS_PROTO_HASH(proto) ((proto) & (IP_VS_PROTO_TAB_SIZE-1))
-
-static struct ip_vs_protocol *ip_vs_proto_table[IP_VS_PROTO_TAB_SIZE];
-
-
-/*
- * register an ipvs protocol
- */
-static int __used __init register_ip_vs_protocol(struct ip_vs_protocol *pp)
-{
- unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
-
- pp->next = ip_vs_proto_table[hash];
- ip_vs_proto_table[hash] = pp;
-
- if (pp->init != NULL)
- pp->init(pp);
-
- return 0;
-}
-
-
-/*
- * unregister an ipvs protocol
- */
-static int unregister_ip_vs_protocol(struct ip_vs_protocol *pp)
-{
- struct ip_vs_protocol **pp_p;
- unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
-
- pp_p = &ip_vs_proto_table[hash];
- for (; *pp_p; pp_p = &(*pp_p)->next) {
- if (*pp_p == pp) {
- *pp_p = pp->next;
- if (pp->exit != NULL)
- pp->exit(pp);
- return 0;
- }
- }
-
- return -ESRCH;
-}
-
-
-/*
- * get ip_vs_protocol object by its proto.
- */
-struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto)
-{
- struct ip_vs_protocol *pp;
- unsigned hash = IP_VS_PROTO_HASH(proto);
-
- for (pp = ip_vs_proto_table[hash]; pp; pp = pp->next) {
- if (pp->protocol == proto)
- return pp;
- }
-
- return NULL;
-}
-
-
-/*
- * Propagate event for state change to all protocols
- */
-void ip_vs_protocol_timeout_change(int flags)
-{
- struct ip_vs_protocol *pp;
- int i;
-
- for (i = 0; i < IP_VS_PROTO_TAB_SIZE; i++) {
- for (pp = ip_vs_proto_table[i]; pp; pp = pp->next) {
- if (pp->timeout_change)
- pp->timeout_change(pp, flags);
- }
- }
-}
-
-
-int *
-ip_vs_create_timeout_table(int *table, int size)
-{
- return kmemdup(table, size, GFP_ATOMIC);
-}
-
-
-/*
- * Set timeout value for state specified by name
- */
-int
-ip_vs_set_state_timeout(int *table, int num, char **names, char *name, int to)
-{
- int i;
-
- if (!table || !name || !to)
- return -EINVAL;
-
- for (i = 0; i < num; i++) {
- if (strcmp(names[i], name))
- continue;
- table[i] = to * HZ;
- return 0;
- }
- return -ENOENT;
-}
-
-
-const char * ip_vs_state_name(__u16 proto, int state)
-{
- struct ip_vs_protocol *pp = ip_vs_proto_get(proto);
-
- if (pp == NULL || pp->state_name == NULL)
- return (IPPROTO_IP == proto) ? "NONE" : "ERR!";
- return pp->state_name(state);
-}
-
-
-void
-ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp,
- const struct sk_buff *skb,
- int offset,
- const char *msg)
-{
- char buf[128];
- struct iphdr _iph, *ih;
-
- ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
- if (ih == NULL)
- sprintf(buf, "%s TRUNCATED", pp->name);
- else if (ih->frag_off & htons(IP_OFFSET))
- sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u frag",
- pp->name, NIPQUAD(ih->saddr),
- NIPQUAD(ih->daddr));
- else {
- __be16 _ports[2], *pptr
-;
- pptr = skb_header_pointer(skb, offset + ih->ihl*4,
- sizeof(_ports), _ports);
- if (pptr == NULL)
- sprintf(buf, "%s TRUNCATED %u.%u.%u.%u->%u.%u.%u.%u",
- pp->name,
- NIPQUAD(ih->saddr),
- NIPQUAD(ih->daddr));
- else
- sprintf(buf, "%s %u.%u.%u.%u:%u->%u.%u.%u.%u:%u",
- pp->name,
- NIPQUAD(ih->saddr),
- ntohs(pptr[0]),
- NIPQUAD(ih->daddr),
- ntohs(pptr[1]));
- }
-
- printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
-}
-
-
-int __init ip_vs_protocol_init(void)
-{
- char protocols[64];
-#define REGISTER_PROTOCOL(p) \
- do { \
- register_ip_vs_protocol(p); \
- strcat(protocols, ", "); \
- strcat(protocols, (p)->name); \
- } while (0)
-
- protocols[0] = '\0';
- protocols[2] = '\0';
-#ifdef CONFIG_IP_VS_PROTO_TCP
- REGISTER_PROTOCOL(&ip_vs_protocol_tcp);
-#endif
-#ifdef CONFIG_IP_VS_PROTO_UDP
- REGISTER_PROTOCOL(&ip_vs_protocol_udp);
-#endif
-#ifdef CONFIG_IP_VS_PROTO_AH
- REGISTER_PROTOCOL(&ip_vs_protocol_ah);
-#endif
-#ifdef CONFIG_IP_VS_PROTO_ESP
- REGISTER_PROTOCOL(&ip_vs_protocol_esp);
-#endif
- IP_VS_INFO("Registered protocols (%s)\n", &protocols[2]);
-
- return 0;
-}
-
-
-void ip_vs_protocol_cleanup(void)
-{
- struct ip_vs_protocol *pp;
- int i;
-
- /* unregister all the ipvs protocols */
- for (i = 0; i < IP_VS_PROTO_TAB_SIZE; i++) {
- while ((pp = ip_vs_proto_table[i]) != NULL)
- unregister_ip_vs_protocol(pp);
- }
-}
diff --git a/net/ipv4/ipvs/ip_vs_proto_ah.c b/net/ipv4/ipvs/ip_vs_proto_ah.c
deleted file mode 100644
index 73e0ea87c1f..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto_ah.c
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * ip_vs_proto_ah.c: AH IPSec load balancing support for IPVS
- *
- * Authors: Julian Anastasov <ja@ssi.bg>, February 2002
- * Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation;
- *
- */
-
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-/* TODO:
-
-struct isakmp_hdr {
- __u8 icookie[8];
- __u8 rcookie[8];
- __u8 np;
- __u8 version;
- __u8 xchgtype;
- __u8 flags;
- __u32 msgid;
- __u32 length;
-};
-
-*/
-
-#define PORT_ISAKMP 500
-
-
-static struct ip_vs_conn *
-ah_conn_in_get(const struct sk_buff *skb,
- struct ip_vs_protocol *pp,
- const struct iphdr *iph,
- unsigned int proto_off,
- int inverse)
-{
- struct ip_vs_conn *cp;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_in_get(IPPROTO_UDP,
- iph->saddr,
- htons(PORT_ISAKMP),
- iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_in_get(IPPROTO_UDP,
- iph->daddr,
- htons(PORT_ISAKMP),
- iph->saddr,
- htons(PORT_ISAKMP));
- }
-
- if (!cp) {
- /*
- * We are not sure if the packet is from our
- * service, so our conn_schedule hook should return NF_ACCEPT
- */
- IP_VS_DBG(12, "Unknown ISAKMP entry for outin packet "
- "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
- inverse ? "ICMP+" : "",
- pp->name,
- NIPQUAD(iph->saddr),
- NIPQUAD(iph->daddr));
- }
-
- return cp;
-}
-
-
-static struct ip_vs_conn *
-ah_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- struct ip_vs_conn *cp;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_out_get(IPPROTO_UDP,
- iph->saddr,
- htons(PORT_ISAKMP),
- iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_out_get(IPPROTO_UDP,
- iph->daddr,
- htons(PORT_ISAKMP),
- iph->saddr,
- htons(PORT_ISAKMP));
- }
-
- if (!cp) {
- IP_VS_DBG(12, "Unknown ISAKMP entry for inout packet "
- "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
- inverse ? "ICMP+" : "",
- pp->name,
- NIPQUAD(iph->saddr),
- NIPQUAD(iph->daddr));
- }
-
- return cp;
-}
-
-
-static int
-ah_conn_schedule(struct sk_buff *skb,
- struct ip_vs_protocol *pp,
- int *verdict, struct ip_vs_conn **cpp)
-{
- /*
- * AH is only related traffic. Pass the packet to IP stack.
- */
- *verdict = NF_ACCEPT;
- return 0;
-}
-
-
-static void
-ah_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
- int offset, const char *msg)
-{
- char buf[256];
- struct iphdr _iph, *ih;
-
- ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
- if (ih == NULL)
- sprintf(buf, "%s TRUNCATED", pp->name);
- else
- sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u",
- pp->name, NIPQUAD(ih->saddr),
- NIPQUAD(ih->daddr));
-
- printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
-}
-
-
-static void ah_init(struct ip_vs_protocol *pp)
-{
- /* nothing to do now */
-}
-
-
-static void ah_exit(struct ip_vs_protocol *pp)
-{
- /* nothing to do now */
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_ah = {
- .name = "AH",
- .protocol = IPPROTO_AH,
- .num_states = 1,
- .dont_defrag = 1,
- .init = ah_init,
- .exit = ah_exit,
- .conn_schedule = ah_conn_schedule,
- .conn_in_get = ah_conn_in_get,
- .conn_out_get = ah_conn_out_get,
- .snat_handler = NULL,
- .dnat_handler = NULL,
- .csum_check = NULL,
- .state_transition = NULL,
- .register_app = NULL,
- .unregister_app = NULL,
- .app_conn_bind = NULL,
- .debug_packet = ah_debug_packet,
- .timeout_change = NULL, /* ISAKMP */
- .set_state_timeout = NULL,
-};
diff --git a/net/ipv4/ipvs/ip_vs_proto_esp.c b/net/ipv4/ipvs/ip_vs_proto_esp.c
deleted file mode 100644
index 21d70c8ffa5..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto_esp.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * ip_vs_proto_esp.c: ESP IPSec load balancing support for IPVS
- *
- * Authors: Julian Anastasov <ja@ssi.bg>, February 2002
- * Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation;
- *
- */
-
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-/* TODO:
-
-struct isakmp_hdr {
- __u8 icookie[8];
- __u8 rcookie[8];
- __u8 np;
- __u8 version;
- __u8 xchgtype;
- __u8 flags;
- __u32 msgid;
- __u32 length;
-};
-
-*/
-
-#define PORT_ISAKMP 500
-
-
-static struct ip_vs_conn *
-esp_conn_in_get(const struct sk_buff *skb,
- struct ip_vs_protocol *pp,
- const struct iphdr *iph,
- unsigned int proto_off,
- int inverse)
-{
- struct ip_vs_conn *cp;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_in_get(IPPROTO_UDP,
- iph->saddr,
- htons(PORT_ISAKMP),
- iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_in_get(IPPROTO_UDP,
- iph->daddr,
- htons(PORT_ISAKMP),
- iph->saddr,
- htons(PORT_ISAKMP));
- }
-
- if (!cp) {
- /*
- * We are not sure if the packet is from our
- * service, so our conn_schedule hook should return NF_ACCEPT
- */
- IP_VS_DBG(12, "Unknown ISAKMP entry for outin packet "
- "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
- inverse ? "ICMP+" : "",
- pp->name,
- NIPQUAD(iph->saddr),
- NIPQUAD(iph->daddr));
- }
-
- return cp;
-}
-
-
-static struct ip_vs_conn *
-esp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- struct ip_vs_conn *cp;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_out_get(IPPROTO_UDP,
- iph->saddr,
- htons(PORT_ISAKMP),
- iph->daddr,
- htons(PORT_ISAKMP));
- } else {
- cp = ip_vs_conn_out_get(IPPROTO_UDP,
- iph->daddr,
- htons(PORT_ISAKMP),
- iph->saddr,
- htons(PORT_ISAKMP));
- }
-
- if (!cp) {
- IP_VS_DBG(12, "Unknown ISAKMP entry for inout packet "
- "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
- inverse ? "ICMP+" : "",
- pp->name,
- NIPQUAD(iph->saddr),
- NIPQUAD(iph->daddr));
- }
-
- return cp;
-}
-
-
-static int
-esp_conn_schedule(struct sk_buff *skb, struct ip_vs_protocol *pp,
- int *verdict, struct ip_vs_conn **cpp)
-{
- /*
- * ESP is only related traffic. Pass the packet to IP stack.
- */
- *verdict = NF_ACCEPT;
- return 0;
-}
-
-
-static void
-esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
- int offset, const char *msg)
-{
- char buf[256];
- struct iphdr _iph, *ih;
-
- ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
- if (ih == NULL)
- sprintf(buf, "%s TRUNCATED", pp->name);
- else
- sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u",
- pp->name, NIPQUAD(ih->saddr),
- NIPQUAD(ih->daddr));
-
- printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
-}
-
-
-static void esp_init(struct ip_vs_protocol *pp)
-{
- /* nothing to do now */
-}
-
-
-static void esp_exit(struct ip_vs_protocol *pp)
-{
- /* nothing to do now */
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_esp = {
- .name = "ESP",
- .protocol = IPPROTO_ESP,
- .num_states = 1,
- .dont_defrag = 1,
- .init = esp_init,
- .exit = esp_exit,
- .conn_schedule = esp_conn_schedule,
- .conn_in_get = esp_conn_in_get,
- .conn_out_get = esp_conn_out_get,
- .snat_handler = NULL,
- .dnat_handler = NULL,
- .csum_check = NULL,
- .state_transition = NULL,
- .register_app = NULL,
- .unregister_app = NULL,
- .app_conn_bind = NULL,
- .debug_packet = esp_debug_packet,
- .timeout_change = NULL, /* ISAKMP */
-};
diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/ipv4/ipvs/ip_vs_proto_tcp.c
deleted file mode 100644
index d0ea467986a..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto_tcp.c
+++ /dev/null
@@ -1,614 +0,0 @@
-/*
- * ip_vs_proto_tcp.c: TCP load balancing support for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/ip.h>
-#include <linux/tcp.h> /* for tcphdr */
-#include <net/ip.h>
-#include <net/tcp.h> /* for csum_tcpudp_magic */
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-static struct ip_vs_conn *
-tcp_conn_in_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
- if (pptr == NULL)
- return NULL;
-
- if (likely(!inverse)) {
- return ip_vs_conn_in_get(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1]);
- } else {
- return ip_vs_conn_in_get(iph->protocol,
- iph->daddr, pptr[1],
- iph->saddr, pptr[0]);
- }
-}
-
-static struct ip_vs_conn *
-tcp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
- if (pptr == NULL)
- return NULL;
-
- if (likely(!inverse)) {
- return ip_vs_conn_out_get(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1]);
- } else {
- return ip_vs_conn_out_get(iph->protocol,
- iph->daddr, pptr[1],
- iph->saddr, pptr[0]);
- }
-}
-
-
-static int
-tcp_conn_schedule(struct sk_buff *skb,
- struct ip_vs_protocol *pp,
- int *verdict, struct ip_vs_conn **cpp)
-{
- struct ip_vs_service *svc;
- struct tcphdr _tcph, *th;
-
- th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph);
- if (th == NULL) {
- *verdict = NF_DROP;
- return 0;
- }
-
- if (th->syn &&
- (svc = ip_vs_service_get(skb->mark, ip_hdr(skb)->protocol,
- ip_hdr(skb)->daddr, th->dest))) {
- if (ip_vs_todrop()) {
- /*
- * It seems that we are very loaded.
- * We have to drop this packet :(
- */
- ip_vs_service_put(svc);
- *verdict = NF_DROP;
- return 0;
- }
-
- /*
- * Let the virtual server select a real server for the
- * incoming connection, and create a connection entry.
- */
- *cpp = ip_vs_schedule(svc, skb);
- if (!*cpp) {
- *verdict = ip_vs_leave(svc, skb, pp);
- return 0;
- }
- ip_vs_service_put(svc);
- }
- return 1;
-}
-
-
-static inline void
-tcp_fast_csum_update(struct tcphdr *tcph, __be32 oldip, __be32 newip,
- __be16 oldport, __be16 newport)
-{
- tcph->check =
- csum_fold(ip_vs_check_diff4(oldip, newip,
- ip_vs_check_diff2(oldport, newport,
- ~csum_unfold(tcph->check))));
-}
-
-
-static int
-tcp_snat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
- struct tcphdr *tcph;
- const unsigned int tcphoff = ip_hdrlen(skb);
-
- /* csum_check requires unshared skb */
- if (!skb_make_writable(skb, tcphoff+sizeof(*tcph)))
- return 0;
-
- if (unlikely(cp->app != NULL)) {
- /* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(skb, pp))
- return 0;
-
- /* Call application helper if needed */
- if (!ip_vs_app_pkt_out(cp, skb))
- return 0;
- }
-
- tcph = (void *)ip_hdr(skb) + tcphoff;
- tcph->source = cp->vport;
-
- /* Adjust TCP checksums */
- if (!cp->app) {
- /* Only port and addr are changed, do fast csum update */
- tcp_fast_csum_update(tcph, cp->daddr, cp->vaddr,
- cp->dport, cp->vport);
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
- } else {
- /* full checksum calculation */
- tcph->check = 0;
- skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
- tcph->check = csum_tcpudp_magic(cp->vaddr, cp->caddr,
- skb->len - tcphoff,
- cp->protocol, skb->csum);
- IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
- pp->name, tcph->check,
- (char*)&(tcph->check) - (char*)tcph);
- }
- return 1;
-}
-
-
-static int
-tcp_dnat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
- struct tcphdr *tcph;
- const unsigned int tcphoff = ip_hdrlen(skb);
-
- /* csum_check requires unshared skb */
- if (!skb_make_writable(skb, tcphoff+sizeof(*tcph)))
- return 0;
-
- if (unlikely(cp->app != NULL)) {
- /* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(skb, pp))
- return 0;
-
- /*
- * Attempt ip_vs_app call.
- * It will fix ip_vs_conn and iph ack_seq stuff
- */
- if (!ip_vs_app_pkt_in(cp, skb))
- return 0;
- }
-
- tcph = (void *)ip_hdr(skb) + tcphoff;
- tcph->dest = cp->dport;
-
- /*
- * Adjust TCP checksums
- */
- if (!cp->app) {
- /* Only port and addr are changed, do fast csum update */
- tcp_fast_csum_update(tcph, cp->vaddr, cp->daddr,
- cp->vport, cp->dport);
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
- } else {
- /* full checksum calculation */
- tcph->check = 0;
- skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
- tcph->check = csum_tcpudp_magic(cp->caddr, cp->daddr,
- skb->len - tcphoff,
- cp->protocol, skb->csum);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- }
- return 1;
-}
-
-
-static int
-tcp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
-{
- const unsigned int tcphoff = ip_hdrlen(skb);
-
- switch (skb->ip_summed) {
- case CHECKSUM_NONE:
- skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
- case CHECKSUM_COMPLETE:
- if (csum_tcpudp_magic(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
- skb->len - tcphoff,
- ip_hdr(skb)->protocol, skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
- "Failed checksum for");
- return 0;
- }
- break;
- default:
- /* No need to checksum. */
- break;
- }
-
- return 1;
-}
-
-
-#define TCP_DIR_INPUT 0
-#define TCP_DIR_OUTPUT 4
-#define TCP_DIR_INPUT_ONLY 8
-
-static const int tcp_state_off[IP_VS_DIR_LAST] = {
- [IP_VS_DIR_INPUT] = TCP_DIR_INPUT,
- [IP_VS_DIR_OUTPUT] = TCP_DIR_OUTPUT,
- [IP_VS_DIR_INPUT_ONLY] = TCP_DIR_INPUT_ONLY,
-};
-
-/*
- * Timeout table[state]
- */
-static int tcp_timeouts[IP_VS_TCP_S_LAST+1] = {
- [IP_VS_TCP_S_NONE] = 2*HZ,
- [IP_VS_TCP_S_ESTABLISHED] = 15*60*HZ,
- [IP_VS_TCP_S_SYN_SENT] = 2*60*HZ,
- [IP_VS_TCP_S_SYN_RECV] = 1*60*HZ,
- [IP_VS_TCP_S_FIN_WAIT] = 2*60*HZ,
- [IP_VS_TCP_S_TIME_WAIT] = 2*60*HZ,
- [IP_VS_TCP_S_CLOSE] = 10*HZ,
- [IP_VS_TCP_S_CLOSE_WAIT] = 60*HZ,
- [IP_VS_TCP_S_LAST_ACK] = 30*HZ,
- [IP_VS_TCP_S_LISTEN] = 2*60*HZ,
- [IP_VS_TCP_S_SYNACK] = 120*HZ,
- [IP_VS_TCP_S_LAST] = 2*HZ,
-};
-
-static char * tcp_state_name_table[IP_VS_TCP_S_LAST+1] = {
- [IP_VS_TCP_S_NONE] = "NONE",
- [IP_VS_TCP_S_ESTABLISHED] = "ESTABLISHED",
- [IP_VS_TCP_S_SYN_SENT] = "SYN_SENT",
- [IP_VS_TCP_S_SYN_RECV] = "SYN_RECV",
- [IP_VS_TCP_S_FIN_WAIT] = "FIN_WAIT",
- [IP_VS_TCP_S_TIME_WAIT] = "TIME_WAIT",
- [IP_VS_TCP_S_CLOSE] = "CLOSE",
- [IP_VS_TCP_S_CLOSE_WAIT] = "CLOSE_WAIT",
- [IP_VS_TCP_S_LAST_ACK] = "LAST_ACK",
- [IP_VS_TCP_S_LISTEN] = "LISTEN",
- [IP_VS_TCP_S_SYNACK] = "SYNACK",
- [IP_VS_TCP_S_LAST] = "BUG!",
-};
-
-#define sNO IP_VS_TCP_S_NONE
-#define sES IP_VS_TCP_S_ESTABLISHED
-#define sSS IP_VS_TCP_S_SYN_SENT
-#define sSR IP_VS_TCP_S_SYN_RECV
-#define sFW IP_VS_TCP_S_FIN_WAIT
-#define sTW IP_VS_TCP_S_TIME_WAIT
-#define sCL IP_VS_TCP_S_CLOSE
-#define sCW IP_VS_TCP_S_CLOSE_WAIT
-#define sLA IP_VS_TCP_S_LAST_ACK
-#define sLI IP_VS_TCP_S_LISTEN
-#define sSA IP_VS_TCP_S_SYNACK
-
-struct tcp_states_t {
- int next_state[IP_VS_TCP_S_LAST];
-};
-
-static const char * tcp_state_name(int state)
-{
- if (state >= IP_VS_TCP_S_LAST)
- return "ERR!";
- return tcp_state_name_table[state] ? tcp_state_name_table[state] : "?";
-}
-
-static struct tcp_states_t tcp_states [] = {
-/* INPUT */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSR, sES, sES, sSR, sSR, sSR, sSR, sSR, sSR, sSR, sSR }},
-/*fin*/ {{sCL, sCW, sSS, sTW, sTW, sTW, sCL, sCW, sLA, sLI, sTW }},
-/*ack*/ {{sCL, sES, sSS, sES, sFW, sTW, sCL, sCW, sCL, sLI, sES }},
-/*rst*/ {{sCL, sCL, sCL, sSR, sCL, sCL, sCL, sCL, sLA, sLI, sSR }},
-
-/* OUTPUT */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSS, sES, sSS, sSR, sSS, sSS, sSS, sSS, sSS, sLI, sSR }},
-/*fin*/ {{sTW, sFW, sSS, sTW, sFW, sTW, sCL, sTW, sLA, sLI, sTW }},
-/*ack*/ {{sES, sES, sSS, sES, sFW, sTW, sCL, sCW, sLA, sES, sES }},
-/*rst*/ {{sCL, sCL, sSS, sCL, sCL, sTW, sCL, sCL, sCL, sCL, sCL }},
-
-/* INPUT-ONLY */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSR, sES, sES, sSR, sSR, sSR, sSR, sSR, sSR, sSR, sSR }},
-/*fin*/ {{sCL, sFW, sSS, sTW, sFW, sTW, sCL, sCW, sLA, sLI, sTW }},
-/*ack*/ {{sCL, sES, sSS, sES, sFW, sTW, sCL, sCW, sCL, sLI, sES }},
-/*rst*/ {{sCL, sCL, sCL, sSR, sCL, sCL, sCL, sCL, sLA, sLI, sCL }},
-};
-
-static struct tcp_states_t tcp_states_dos [] = {
-/* INPUT */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSR, sES, sES, sSR, sSR, sSR, sSR, sSR, sSR, sSR, sSA }},
-/*fin*/ {{sCL, sCW, sSS, sTW, sTW, sTW, sCL, sCW, sLA, sLI, sSA }},
-/*ack*/ {{sCL, sES, sSS, sSR, sFW, sTW, sCL, sCW, sCL, sLI, sSA }},
-/*rst*/ {{sCL, sCL, sCL, sSR, sCL, sCL, sCL, sCL, sLA, sLI, sCL }},
-
-/* OUTPUT */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSS, sES, sSS, sSA, sSS, sSS, sSS, sSS, sSS, sLI, sSA }},
-/*fin*/ {{sTW, sFW, sSS, sTW, sFW, sTW, sCL, sTW, sLA, sLI, sTW }},
-/*ack*/ {{sES, sES, sSS, sES, sFW, sTW, sCL, sCW, sLA, sES, sES }},
-/*rst*/ {{sCL, sCL, sSS, sCL, sCL, sTW, sCL, sCL, sCL, sCL, sCL }},
-
-/* INPUT-ONLY */
-/* sNO, sES, sSS, sSR, sFW, sTW, sCL, sCW, sLA, sLI, sSA */
-/*syn*/ {{sSA, sES, sES, sSR, sSA, sSA, sSA, sSA, sSA, sSA, sSA }},
-/*fin*/ {{sCL, sFW, sSS, sTW, sFW, sTW, sCL, sCW, sLA, sLI, sTW }},
-/*ack*/ {{sCL, sES, sSS, sES, sFW, sTW, sCL, sCW, sCL, sLI, sES }},
-/*rst*/ {{sCL, sCL, sCL, sSR, sCL, sCL, sCL, sCL, sLA, sLI, sCL }},
-};
-
-static struct tcp_states_t *tcp_state_table = tcp_states;
-
-
-static void tcp_timeout_change(struct ip_vs_protocol *pp, int flags)
-{
- int on = (flags & 1); /* secure_tcp */
-
- /*
- ** FIXME: change secure_tcp to independent sysctl var
- ** or make it per-service or per-app because it is valid
- ** for most if not for all of the applications. Something
- ** like "capabilities" (flags) for each object.
- */
- tcp_state_table = (on? tcp_states_dos : tcp_states);
-}
-
-static int
-tcp_set_state_timeout(struct ip_vs_protocol *pp, char *sname, int to)
-{
- return ip_vs_set_state_timeout(pp->timeout_table, IP_VS_TCP_S_LAST,
- tcp_state_name_table, sname, to);
-}
-
-static inline int tcp_state_idx(struct tcphdr *th)
-{
- if (th->rst)
- return 3;
- if (th->syn)
- return 0;
- if (th->fin)
- return 1;
- if (th->ack)
- return 2;
- return -1;
-}
-
-static inline void
-set_tcp_state(struct ip_vs_protocol *pp, struct ip_vs_conn *cp,
- int direction, struct tcphdr *th)
-{
- int state_idx;
- int new_state = IP_VS_TCP_S_CLOSE;
- int state_off = tcp_state_off[direction];
-
- /*
- * Update state offset to INPUT_ONLY if necessary
- * or delete NO_OUTPUT flag if output packet detected
- */
- if (cp->flags & IP_VS_CONN_F_NOOUTPUT) {
- if (state_off == TCP_DIR_OUTPUT)
- cp->flags &= ~IP_VS_CONN_F_NOOUTPUT;
- else
- state_off = TCP_DIR_INPUT_ONLY;
- }
-
- if ((state_idx = tcp_state_idx(th)) < 0) {
- IP_VS_DBG(8, "tcp_state_idx=%d!!!\n", state_idx);
- goto tcp_state_out;
- }
-
- new_state = tcp_state_table[state_off+state_idx].next_state[cp->state];
-
- tcp_state_out:
- if (new_state != cp->state) {
- struct ip_vs_dest *dest = cp->dest;
-
- IP_VS_DBG(8, "%s %s [%c%c%c%c] %u.%u.%u.%u:%d->"
- "%u.%u.%u.%u:%d state: %s->%s conn->refcnt:%d\n",
- pp->name,
- (state_off==TCP_DIR_OUTPUT)?"output ":"input ",
- th->syn? 'S' : '.',
- th->fin? 'F' : '.',
- th->ack? 'A' : '.',
- th->rst? 'R' : '.',
- NIPQUAD(cp->daddr), ntohs(cp->dport),
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- tcp_state_name(cp->state),
- tcp_state_name(new_state),
- atomic_read(&cp->refcnt));
- if (dest) {
- if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (new_state != IP_VS_TCP_S_ESTABLISHED)) {
- atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
- cp->flags |= IP_VS_CONN_F_INACTIVE;
- } else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (new_state == IP_VS_TCP_S_ESTABLISHED)) {
- atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
- cp->flags &= ~IP_VS_CONN_F_INACTIVE;
- }
- }
- }
-
- cp->timeout = pp->timeout_table[cp->state = new_state];
-}
-
-
-/*
- * Handle state transitions
- */
-static int
-tcp_state_transition(struct ip_vs_conn *cp, int direction,
- const struct sk_buff *skb,
- struct ip_vs_protocol *pp)
-{
- struct tcphdr _tcph, *th;
-
- th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph);
- if (th == NULL)
- return 0;
-
- spin_lock(&cp->lock);
- set_tcp_state(pp, cp, direction, th);
- spin_unlock(&cp->lock);
-
- return 1;
-}
-
-
-/*
- * Hash table for TCP application incarnations
- */
-#define TCP_APP_TAB_BITS 4
-#define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
-#define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
-
-static struct list_head tcp_apps[TCP_APP_TAB_SIZE];
-static DEFINE_SPINLOCK(tcp_app_lock);
-
-static inline __u16 tcp_app_hashkey(__be16 port)
-{
- return (((__force u16)port >> TCP_APP_TAB_BITS) ^ (__force u16)port)
- & TCP_APP_TAB_MASK;
-}
-
-
-static int tcp_register_app(struct ip_vs_app *inc)
-{
- struct ip_vs_app *i;
- __u16 hash;
- __be16 port = inc->port;
- int ret = 0;
-
- hash = tcp_app_hashkey(port);
-
- spin_lock_bh(&tcp_app_lock);
- list_for_each_entry(i, &tcp_apps[hash], p_list) {
- if (i->port == port) {
- ret = -EEXIST;
- goto out;
- }
- }
- list_add(&inc->p_list, &tcp_apps[hash]);
- atomic_inc(&ip_vs_protocol_tcp.appcnt);
-
- out:
- spin_unlock_bh(&tcp_app_lock);
- return ret;
-}
-
-
-static void
-tcp_unregister_app(struct ip_vs_app *inc)
-{
- spin_lock_bh(&tcp_app_lock);
- atomic_dec(&ip_vs_protocol_tcp.appcnt);
- list_del(&inc->p_list);
- spin_unlock_bh(&tcp_app_lock);
-}
-
-
-static int
-tcp_app_conn_bind(struct ip_vs_conn *cp)
-{
- int hash;
- struct ip_vs_app *inc;
- int result = 0;
-
- /* Default binding: bind app only for NAT */
- if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
- return 0;
-
- /* Lookup application incarnations and bind the right one */
- hash = tcp_app_hashkey(cp->vport);
-
- spin_lock(&tcp_app_lock);
- list_for_each_entry(inc, &tcp_apps[hash], p_list) {
- if (inc->port == cp->vport) {
- if (unlikely(!ip_vs_app_inc_get(inc)))
- break;
- spin_unlock(&tcp_app_lock);
-
- IP_VS_DBG(9, "%s: Binding conn %u.%u.%u.%u:%u->"
- "%u.%u.%u.%u:%u to app %s on port %u\n",
- __func__,
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- NIPQUAD(cp->vaddr), ntohs(cp->vport),
- inc->name, ntohs(inc->port));
- cp->app = inc;
- if (inc->init_conn)
- result = inc->init_conn(inc, cp);
- goto out;
- }
- }
- spin_unlock(&tcp_app_lock);
-
- out:
- return result;
-}
-
-
-/*
- * Set LISTEN timeout. (ip_vs_conn_put will setup timer)
- */
-void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp)
-{
- spin_lock(&cp->lock);
- cp->state = IP_VS_TCP_S_LISTEN;
- cp->timeout = ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_LISTEN];
- spin_unlock(&cp->lock);
-}
-
-
-static void ip_vs_tcp_init(struct ip_vs_protocol *pp)
-{
- IP_VS_INIT_HASH_TABLE(tcp_apps);
- pp->timeout_table = tcp_timeouts;
-}
-
-
-static void ip_vs_tcp_exit(struct ip_vs_protocol *pp)
-{
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_tcp = {
- .name = "TCP",
- .protocol = IPPROTO_TCP,
- .num_states = IP_VS_TCP_S_LAST,
- .dont_defrag = 0,
- .appcnt = ATOMIC_INIT(0),
- .init = ip_vs_tcp_init,
- .exit = ip_vs_tcp_exit,
- .register_app = tcp_register_app,
- .unregister_app = tcp_unregister_app,
- .conn_schedule = tcp_conn_schedule,
- .conn_in_get = tcp_conn_in_get,
- .conn_out_get = tcp_conn_out_get,
- .snat_handler = tcp_snat_handler,
- .dnat_handler = tcp_dnat_handler,
- .csum_check = tcp_csum_check,
- .state_name = tcp_state_name,
- .state_transition = tcp_state_transition,
- .app_conn_bind = tcp_app_conn_bind,
- .debug_packet = ip_vs_tcpudp_debug_packet,
- .timeout_change = tcp_timeout_change,
- .set_state_timeout = tcp_set_state_timeout,
-};
diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/ipv4/ipvs/ip_vs_proto_udp.c
deleted file mode 100644
index c6be5d56823..00000000000
--- a/net/ipv4/ipvs/ip_vs_proto_udp.c
+++ /dev/null
@@ -1,428 +0,0 @@
-/*
- * ip_vs_proto_udp.c: UDP load balancing support for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/kernel.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/udp.h>
-
-#include <net/ip_vs.h>
-#include <net/ip.h>
-
-static struct ip_vs_conn *
-udp_conn_in_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- struct ip_vs_conn *cp;
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
- if (pptr == NULL)
- return NULL;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_in_get(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1]);
- } else {
- cp = ip_vs_conn_in_get(iph->protocol,
- iph->daddr, pptr[1],
- iph->saddr, pptr[0]);
- }
-
- return cp;
-}
-
-
-static struct ip_vs_conn *
-udp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
- const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
- struct ip_vs_conn *cp;
- __be16 _ports[2], *pptr;
-
- pptr = skb_header_pointer(skb, ip_hdrlen(skb),
- sizeof(_ports), _ports);
- if (pptr == NULL)
- return NULL;
-
- if (likely(!inverse)) {
- cp = ip_vs_conn_out_get(iph->protocol,
- iph->saddr, pptr[0],
- iph->daddr, pptr[1]);
- } else {
- cp = ip_vs_conn_out_get(iph->protocol,
- iph->daddr, pptr[1],
- iph->saddr, pptr[0]);
- }
-
- return cp;
-}
-
-
-static int
-udp_conn_schedule(struct sk_buff *skb, struct ip_vs_protocol *pp,
- int *verdict, struct ip_vs_conn **cpp)
-{
- struct ip_vs_service *svc;
- struct udphdr _udph, *uh;
-
- uh = skb_header_pointer(skb, ip_hdrlen(skb),
- sizeof(_udph), &_udph);
- if (uh == NULL) {
- *verdict = NF_DROP;
- return 0;
- }
-
- if ((svc = ip_vs_service_get(skb->mark, ip_hdr(skb)->protocol,
- ip_hdr(skb)->daddr, uh->dest))) {
- if (ip_vs_todrop()) {
- /*
- * It seems that we are very loaded.
- * We have to drop this packet :(
- */
- ip_vs_service_put(svc);
- *verdict = NF_DROP;
- return 0;
- }
-
- /*
- * Let the virtual server select a real server for the
- * incoming connection, and create a connection entry.
- */
- *cpp = ip_vs_schedule(svc, skb);
- if (!*cpp) {
- *verdict = ip_vs_leave(svc, skb, pp);
- return 0;
- }
- ip_vs_service_put(svc);
- }
- return 1;
-}
-
-
-static inline void
-udp_fast_csum_update(struct udphdr *uhdr, __be32 oldip, __be32 newip,
- __be16 oldport, __be16 newport)
-{
- uhdr->check =
- csum_fold(ip_vs_check_diff4(oldip, newip,
- ip_vs_check_diff2(oldport, newport,
- ~csum_unfold(uhdr->check))));
- if (!uhdr->check)
- uhdr->check = CSUM_MANGLED_0;
-}
-
-static int
-udp_snat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
- struct udphdr *udph;
- const unsigned int udphoff = ip_hdrlen(skb);
-
- /* csum_check requires unshared skb */
- if (!skb_make_writable(skb, udphoff+sizeof(*udph)))
- return 0;
-
- if (unlikely(cp->app != NULL)) {
- /* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(skb, pp))
- return 0;
-
- /*
- * Call application helper if needed
- */
- if (!ip_vs_app_pkt_out(cp, skb))
- return 0;
- }
-
- udph = (void *)ip_hdr(skb) + udphoff;
- udph->source = cp->vport;
-
- /*
- * Adjust UDP checksums
- */
- if (!cp->app && (udph->check != 0)) {
- /* Only port and addr are changed, do fast csum update */
- udp_fast_csum_update(udph, cp->daddr, cp->vaddr,
- cp->dport, cp->vport);
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
- } else {
- /* full checksum calculation */
- udph->check = 0;
- skb->csum = skb_checksum(skb, udphoff, skb->len - udphoff, 0);
- udph->check = csum_tcpudp_magic(cp->vaddr, cp->caddr,
- skb->len - udphoff,
- cp->protocol, skb->csum);
- if (udph->check == 0)
- udph->check = CSUM_MANGLED_0;
- IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
- pp->name, udph->check,
- (char*)&(udph->check) - (char*)udph);
- }
- return 1;
-}
-
-
-static int
-udp_dnat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
-{
- struct udphdr *udph;
- unsigned int udphoff = ip_hdrlen(skb);
-
- /* csum_check requires unshared skb */
- if (!skb_make_writable(skb, udphoff+sizeof(*udph)))
- return 0;
-
- if (unlikely(cp->app != NULL)) {
- /* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(skb, pp))
- return 0;
-
- /*
- * Attempt ip_vs_app call.
- * It will fix ip_vs_conn
- */
- if (!ip_vs_app_pkt_in(cp, skb))
- return 0;
- }
-
- udph = (void *)ip_hdr(skb) + udphoff;
- udph->dest = cp->dport;
-
- /*
- * Adjust UDP checksums
- */
- if (!cp->app && (udph->check != 0)) {
- /* Only port and addr are changed, do fast csum update */
- udp_fast_csum_update(udph, cp->vaddr, cp->daddr,
- cp->vport, cp->dport);
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
- } else {
- /* full checksum calculation */
- udph->check = 0;
- skb->csum = skb_checksum(skb, udphoff, skb->len - udphoff, 0);
- udph->check = csum_tcpudp_magic(cp->caddr, cp->daddr,
- skb->len - udphoff,
- cp->protocol, skb->csum);
- if (udph->check == 0)
- udph->check = CSUM_MANGLED_0;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- }
- return 1;
-}
-
-
-static int
-udp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
-{
- struct udphdr _udph, *uh;
- const unsigned int udphoff = ip_hdrlen(skb);
-
- uh = skb_header_pointer(skb, udphoff, sizeof(_udph), &_udph);
- if (uh == NULL)
- return 0;
-
- if (uh->check != 0) {
- switch (skb->ip_summed) {
- case CHECKSUM_NONE:
- skb->csum = skb_checksum(skb, udphoff,
- skb->len - udphoff, 0);
- case CHECKSUM_COMPLETE:
- if (csum_tcpudp_magic(ip_hdr(skb)->saddr,
- ip_hdr(skb)->daddr,
- skb->len - udphoff,
- ip_hdr(skb)->protocol,
- skb->csum)) {
- IP_VS_DBG_RL_PKT(0, pp, skb, 0,
- "Failed checksum for");
- return 0;
- }
- break;
- default:
- /* No need to checksum. */
- break;
- }
- }
- return 1;
-}
-
-
-/*
- * Note: the caller guarantees that only one of register_app,
- * unregister_app or app_conn_bind is called each time.
- */
-
-#define UDP_APP_TAB_BITS 4
-#define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
-#define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
-
-static struct list_head udp_apps[UDP_APP_TAB_SIZE];
-static DEFINE_SPINLOCK(udp_app_lock);
-
-static inline __u16 udp_app_hashkey(__be16 port)
-{
- return (((__force u16)port >> UDP_APP_TAB_BITS) ^ (__force u16)port)
- & UDP_APP_TAB_MASK;
-}
-
-
-static int udp_register_app(struct ip_vs_app *inc)
-{
- struct ip_vs_app *i;
- __u16 hash;
- __be16 port = inc->port;
- int ret = 0;
-
- hash = udp_app_hashkey(port);
-
-
- spin_lock_bh(&udp_app_lock);
- list_for_each_entry(i, &udp_apps[hash], p_list) {
- if (i->port == port) {
- ret = -EEXIST;
- goto out;
- }
- }
- list_add(&inc->p_list, &udp_apps[hash]);
- atomic_inc(&ip_vs_protocol_udp.appcnt);
-
- out:
- spin_unlock_bh(&udp_app_lock);
- return ret;
-}
-
-
-static void
-udp_unregister_app(struct ip_vs_app *inc)
-{
- spin_lock_bh(&udp_app_lock);
- atomic_dec(&ip_vs_protocol_udp.appcnt);
- list_del(&inc->p_list);
- spin_unlock_bh(&udp_app_lock);
-}
-
-
-static int udp_app_conn_bind(struct ip_vs_conn *cp)
-{
- int hash;
- struct ip_vs_app *inc;
- int result = 0;
-
- /* Default binding: bind app only for NAT */
- if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)
- return 0;
-
- /* Lookup application incarnations and bind the right one */
- hash = udp_app_hashkey(cp->vport);
-
- spin_lock(&udp_app_lock);
- list_for_each_entry(inc, &udp_apps[hash], p_list) {
- if (inc->port == cp->vport) {
- if (unlikely(!ip_vs_app_inc_get(inc)))
- break;
- spin_unlock(&udp_app_lock);
-
- IP_VS_DBG(9, "%s: Binding conn %u.%u.%u.%u:%u->"
- "%u.%u.%u.%u:%u to app %s on port %u\n",
- __func__,
- NIPQUAD(cp->caddr), ntohs(cp->cport),
- NIPQUAD(cp->vaddr), ntohs(cp->vport),
- inc->name, ntohs(inc->port));
- cp->app = inc;
- if (inc->init_conn)
- result = inc->init_conn(inc, cp);
- goto out;
- }
- }
- spin_unlock(&udp_app_lock);
-
- out:
- return result;
-}
-
-
-static int udp_timeouts[IP_VS_UDP_S_LAST+1] = {
- [IP_VS_UDP_S_NORMAL] = 5*60*HZ,
- [IP_VS_UDP_S_LAST] = 2*HZ,
-};
-
-static char * udp_state_name_table[IP_VS_UDP_S_LAST+1] = {
- [IP_VS_UDP_S_NORMAL] = "UDP",
- [IP_VS_UDP_S_LAST] = "BUG!",
-};
-
-
-static int
-udp_set_state_timeout(struct ip_vs_protocol *pp, char *sname, int to)
-{
- return ip_vs_set_state_timeout(pp->timeout_table, IP_VS_UDP_S_LAST,
- udp_state_name_table, sname, to);
-}
-
-static const char * udp_state_name(int state)
-{
- if (state >= IP_VS_UDP_S_LAST)
- return "ERR!";
- return udp_state_name_table[state] ? udp_state_name_table[state] : "?";
-}
-
-static int
-udp_state_transition(struct ip_vs_conn *cp, int direction,
- const struct sk_buff *skb,
- struct ip_vs_protocol *pp)
-{
- cp->timeout = pp->timeout_table[IP_VS_UDP_S_NORMAL];
- return 1;
-}
-
-static void udp_init(struct ip_vs_protocol *pp)
-{
- IP_VS_INIT_HASH_TABLE(udp_apps);
- pp->timeout_table = udp_timeouts;
-}
-
-static void udp_exit(struct ip_vs_protocol *pp)
-{
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_udp = {
- .name = "UDP",
- .protocol = IPPROTO_UDP,
- .num_states = IP_VS_UDP_S_LAST,
- .dont_defrag = 0,
- .init = udp_init,
- .exit = udp_exit,
- .conn_schedule = udp_conn_schedule,
- .conn_in_get = udp_conn_in_get,
- .conn_out_get = udp_conn_out_get,
- .snat_handler = udp_snat_handler,
- .dnat_handler = udp_dnat_handler,
- .csum_check = udp_csum_check,
- .state_transition = udp_state_transition,
- .state_name = udp_state_name,
- .register_app = udp_register_app,
- .unregister_app = udp_unregister_app,
- .app_conn_bind = udp_app_conn_bind,
- .debug_packet = ip_vs_tcpudp_debug_packet,
- .timeout_change = NULL,
- .set_state_timeout = udp_set_state_timeout,
-};
diff --git a/net/ipv4/ipvs/ip_vs_rr.c b/net/ipv4/ipvs/ip_vs_rr.c
deleted file mode 100644
index 358110d17e5..00000000000
--- a/net/ipv4/ipvs/ip_vs_rr.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * IPVS: Round-Robin Scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Fixes/Changes:
- * Wensong Zhang : changed the ip_vs_rr_schedule to return dest
- * Julian Anastasov : fixed the NULL pointer access bug in debugging
- * Wensong Zhang : changed some comestics things for debugging
- * Wensong Zhang : changed for the d-linked destination list
- * Wensong Zhang : added the ip_vs_rr_update_svc
- * Wensong Zhang : added any dest with weight=0 is quiesced
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static int ip_vs_rr_init_svc(struct ip_vs_service *svc)
-{
- svc->sched_data = &svc->destinations;
- return 0;
-}
-
-
-static int ip_vs_rr_done_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int ip_vs_rr_update_svc(struct ip_vs_service *svc)
-{
- svc->sched_data = &svc->destinations;
- return 0;
-}
-
-
-/*
- * Round-Robin Scheduling
- */
-static struct ip_vs_dest *
-ip_vs_rr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct list_head *p, *q;
- struct ip_vs_dest *dest;
-
- IP_VS_DBG(6, "ip_vs_rr_schedule(): Scheduling...\n");
-
- write_lock(&svc->sched_lock);
- p = (struct list_head *)svc->sched_data;
- p = p->next;
- q = p;
- do {
- /* skip list head */
- if (q == &svc->destinations) {
- q = q->next;
- continue;
- }
-
- dest = list_entry(q, struct ip_vs_dest, n_list);
- if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
- atomic_read(&dest->weight) > 0)
- /* HIT */
- goto out;
- q = q->next;
- } while (q != p);
- write_unlock(&svc->sched_lock);
- return NULL;
-
- out:
- svc->sched_data = q;
- write_unlock(&svc->sched_lock);
- IP_VS_DBG(6, "RR: server %u.%u.%u.%u:%u "
- "activeconns %d refcnt %d weight %d\n",
- NIPQUAD(dest->addr), ntohs(dest->port),
- atomic_read(&dest->activeconns),
- atomic_read(&dest->refcnt), atomic_read(&dest->weight));
-
- return dest;
-}
-
-
-static struct ip_vs_scheduler ip_vs_rr_scheduler = {
- .name = "rr", /* name */
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_rr_scheduler.n_list),
- .init_service = ip_vs_rr_init_svc,
- .done_service = ip_vs_rr_done_svc,
- .update_service = ip_vs_rr_update_svc,
- .schedule = ip_vs_rr_schedule,
-};
-
-static int __init ip_vs_rr_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_rr_scheduler);
-}
-
-static void __exit ip_vs_rr_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_rr_scheduler);
-}
-
-module_init(ip_vs_rr_init);
-module_exit(ip_vs_rr_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_sched.c b/net/ipv4/ipvs/ip_vs_sched.c
deleted file mode 100644
index a46ad9e3501..00000000000
--- a/net/ipv4/ipvs/ip_vs_sched.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the Netfilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <asm/string.h>
-#include <linux/kmod.h>
-#include <linux/sysctl.h>
-
-#include <net/ip_vs.h>
-
-/*
- * IPVS scheduler list
- */
-static LIST_HEAD(ip_vs_schedulers);
-
-/* lock for service table */
-static DEFINE_RWLOCK(__ip_vs_sched_lock);
-
-
-/*
- * Bind a service with a scheduler
- */
-int ip_vs_bind_scheduler(struct ip_vs_service *svc,
- struct ip_vs_scheduler *scheduler)
-{
- int ret;
-
- if (svc == NULL) {
- IP_VS_ERR("ip_vs_bind_scheduler(): svc arg NULL\n");
- return -EINVAL;
- }
- if (scheduler == NULL) {
- IP_VS_ERR("ip_vs_bind_scheduler(): scheduler arg NULL\n");
- return -EINVAL;
- }
-
- svc->scheduler = scheduler;
-
- if (scheduler->init_service) {
- ret = scheduler->init_service(svc);
- if (ret) {
- IP_VS_ERR("ip_vs_bind_scheduler(): init error\n");
- return ret;
- }
- }
-
- return 0;
-}
-
-
-/*
- * Unbind a service with its scheduler
- */
-int ip_vs_unbind_scheduler(struct ip_vs_service *svc)
-{
- struct ip_vs_scheduler *sched;
-
- if (svc == NULL) {
- IP_VS_ERR("ip_vs_unbind_scheduler(): svc arg NULL\n");
- return -EINVAL;
- }
-
- sched = svc->scheduler;
- if (sched == NULL) {
- IP_VS_ERR("ip_vs_unbind_scheduler(): svc isn't bound\n");
- return -EINVAL;
- }
-
- if (sched->done_service) {
- if (sched->done_service(svc) != 0) {
- IP_VS_ERR("ip_vs_unbind_scheduler(): done error\n");
- return -EINVAL;
- }
- }
-
- svc->scheduler = NULL;
- return 0;
-}
-
-
-/*
- * Get scheduler in the scheduler list by name
- */
-static struct ip_vs_scheduler *ip_vs_sched_getbyname(const char *sched_name)
-{
- struct ip_vs_scheduler *sched;
-
- IP_VS_DBG(2, "ip_vs_sched_getbyname(): sched_name \"%s\"\n",
- sched_name);
-
- read_lock_bh(&__ip_vs_sched_lock);
-
- list_for_each_entry(sched, &ip_vs_schedulers, n_list) {
- /*
- * Test and get the modules atomically
- */
- if (sched->module && !try_module_get(sched->module)) {
- /*
- * This scheduler is just deleted
- */
- continue;
- }
- if (strcmp(sched_name, sched->name)==0) {
- /* HIT */
- read_unlock_bh(&__ip_vs_sched_lock);
- return sched;
- }
- if (sched->module)
- module_put(sched->module);
- }
-
- read_unlock_bh(&__ip_vs_sched_lock);
- return NULL;
-}
-
-
-/*
- * Lookup scheduler and try to load it if it doesn't exist
- */
-struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name)
-{
- struct ip_vs_scheduler *sched;
-
- /*
- * Search for the scheduler by sched_name
- */
- sched = ip_vs_sched_getbyname(sched_name);
-
- /*
- * If scheduler not found, load the module and search again
- */
- if (sched == NULL) {
- request_module("ip_vs_%s", sched_name);
- sched = ip_vs_sched_getbyname(sched_name);
- }
-
- return sched;
-}
-
-void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler)
-{
- if (scheduler->module)
- module_put(scheduler->module);
-}
-
-
-/*
- * Register a scheduler in the scheduler list
- */
-int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler)
-{
- struct ip_vs_scheduler *sched;
-
- if (!scheduler) {
- IP_VS_ERR("register_ip_vs_scheduler(): NULL arg\n");
- return -EINVAL;
- }
-
- if (!scheduler->name) {
- IP_VS_ERR("register_ip_vs_scheduler(): NULL scheduler_name\n");
- return -EINVAL;
- }
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- write_lock_bh(&__ip_vs_sched_lock);
-
- if (!list_empty(&scheduler->n_list)) {
- write_unlock_bh(&__ip_vs_sched_lock);
- ip_vs_use_count_dec();
- IP_VS_ERR("register_ip_vs_scheduler(): [%s] scheduler "
- "already linked\n", scheduler->name);
- return -EINVAL;
- }
-
- /*
- * Make sure that the scheduler with this name doesn't exist
- * in the scheduler list.
- */
- list_for_each_entry(sched, &ip_vs_schedulers, n_list) {
- if (strcmp(scheduler->name, sched->name) == 0) {
- write_unlock_bh(&__ip_vs_sched_lock);
- ip_vs_use_count_dec();
- IP_VS_ERR("register_ip_vs_scheduler(): [%s] scheduler "
- "already existed in the system\n",
- scheduler->name);
- return -EINVAL;
- }
- }
- /*
- * Add it into the d-linked scheduler list
- */
- list_add(&scheduler->n_list, &ip_vs_schedulers);
- write_unlock_bh(&__ip_vs_sched_lock);
-
- IP_VS_INFO("[%s] scheduler registered.\n", scheduler->name);
-
- return 0;
-}
-
-
-/*
- * Unregister a scheduler from the scheduler list
- */
-int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler)
-{
- if (!scheduler) {
- IP_VS_ERR( "unregister_ip_vs_scheduler(): NULL arg\n");
- return -EINVAL;
- }
-
- write_lock_bh(&__ip_vs_sched_lock);
- if (list_empty(&scheduler->n_list)) {
- write_unlock_bh(&__ip_vs_sched_lock);
- IP_VS_ERR("unregister_ip_vs_scheduler(): [%s] scheduler "
- "is not in the list. failed\n", scheduler->name);
- return -EINVAL;
- }
-
- /*
- * Remove it from the d-linked scheduler list
- */
- list_del(&scheduler->n_list);
- write_unlock_bh(&__ip_vs_sched_lock);
-
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- IP_VS_INFO("[%s] scheduler unregistered.\n", scheduler->name);
-
- return 0;
-}
diff --git a/net/ipv4/ipvs/ip_vs_sed.c b/net/ipv4/ipvs/ip_vs_sed.c
deleted file mode 100644
index 77663d84cbd..00000000000
--- a/net/ipv4/ipvs/ip_vs_sed.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * IPVS: Shortest Expected Delay scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-/*
- * The SED algorithm attempts to minimize each job's expected delay until
- * completion. The expected delay that the job will experience is
- * (Ci + 1) / Ui if sent to the ith server, in which Ci is the number of
- * jobs on the ith server and Ui is the fixed service rate (weight) of
- * the ith server. The SED algorithm adopts a greedy policy that each does
- * what is in its own best interest, i.e. to join the queue which would
- * minimize its expected delay of completion.
- *
- * See the following paper for more information:
- * A. Weinrib and S. Shenker, Greed is not enough: Adaptive load sharing
- * in large heterogeneous systems. In Proceedings IEEE INFOCOM'88,
- * pages 986-994, 1988.
- *
- * Thanks must go to Marko Buuri <marko@buuri.name> for talking SED to me.
- *
- * The difference between SED and WLC is that SED includes the incoming
- * job in the cost function (the increment of 1). SED may outperform
- * WLC, while scheduling big jobs under larger heterogeneous systems
- * (the server weight varies a lot).
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static int
-ip_vs_sed_init_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_sed_done_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_sed_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline unsigned int
-ip_vs_sed_dest_overhead(struct ip_vs_dest *dest)
-{
- /*
- * We only use the active connection number in the cost
- * calculation here.
- */
- return atomic_read(&dest->activeconns) + 1;
-}
-
-
-/*
- * Weighted Least Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_sed_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest, *least;
- unsigned int loh, doh;
-
- IP_VS_DBG(6, "ip_vs_sed_schedule(): Scheduling...\n");
-
- /*
- * We calculate the load of each dest server as follows:
- * (server expected overhead) / dest->weight
- *
- * Remember -- no floats in kernel mode!!!
- * The comparison of h1*w2 > h2*w1 is equivalent to that of
- * h1/w1 > h2/w2
- * if every weight is larger than zero.
- *
- * The server with weight=0 is quiesced and will not receive any
- * new connections.
- */
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
- atomic_read(&dest->weight) > 0) {
- least = dest;
- loh = ip_vs_sed_dest_overhead(least);
- goto nextstage;
- }
- }
- return NULL;
-
- /*
- * Find the destination with the least load.
- */
- nextstage:
- list_for_each_entry_continue(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
- doh = ip_vs_sed_dest_overhead(dest);
- if (loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight)) {
- least = dest;
- loh = doh;
- }
- }
-
- IP_VS_DBG(6, "SED: server %u.%u.%u.%u:%u "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
-
- return least;
-}
-
-
-static struct ip_vs_scheduler ip_vs_sed_scheduler =
-{
- .name = "sed",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_sed_scheduler.n_list),
- .init_service = ip_vs_sed_init_svc,
- .done_service = ip_vs_sed_done_svc,
- .update_service = ip_vs_sed_update_svc,
- .schedule = ip_vs_sed_schedule,
-};
-
-
-static int __init ip_vs_sed_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_sed_scheduler);
-}
-
-static void __exit ip_vs_sed_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_sed_scheduler);
-}
-
-module_init(ip_vs_sed_init);
-module_exit(ip_vs_sed_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_sh.c b/net/ipv4/ipvs/ip_vs_sh.c
deleted file mode 100644
index 7b979e22805..00000000000
--- a/net/ipv4/ipvs/ip_vs_sh.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * IPVS: Source Hashing scheduling module
- *
- * Authors: Wensong Zhang <wensong@gnuchina.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-/*
- * The sh algorithm is to select server by the hash key of source IP
- * address. The pseudo code is as follows:
- *
- * n <- servernode[src_ip];
- * if (n is dead) OR
- * (n is overloaded) or (n.weight <= 0) then
- * return NULL;
- *
- * return n;
- *
- * Notes that servernode is a 256-bucket hash table that maps the hash
- * index derived from packet source IP address to the current server
- * array. If the sh scheduler is used in cache cluster, it is good to
- * combine it with cache_bypass feature. When the statically assigned
- * server is dead or overloaded, the load balancer can bypass the cache
- * server and send requests to the original server directly.
- *
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * IPVS SH bucket
- */
-struct ip_vs_sh_bucket {
- struct ip_vs_dest *dest; /* real server (cache) */
-};
-
-/*
- * for IPVS SH entry hash table
- */
-#ifndef CONFIG_IP_VS_SH_TAB_BITS
-#define CONFIG_IP_VS_SH_TAB_BITS 8
-#endif
-#define IP_VS_SH_TAB_BITS CONFIG_IP_VS_SH_TAB_BITS
-#define IP_VS_SH_TAB_SIZE (1 << IP_VS_SH_TAB_BITS)
-#define IP_VS_SH_TAB_MASK (IP_VS_SH_TAB_SIZE - 1)
-
-
-/*
- * Returns hash value for IPVS SH entry
- */
-static inline unsigned ip_vs_sh_hashkey(__be32 addr)
-{
- return (ntohl(addr)*2654435761UL) & IP_VS_SH_TAB_MASK;
-}
-
-
-/*
- * Get ip_vs_dest associated with supplied parameters.
- */
-static inline struct ip_vs_dest *
-ip_vs_sh_get(struct ip_vs_sh_bucket *tbl, __be32 addr)
-{
- return (tbl[ip_vs_sh_hashkey(addr)]).dest;
-}
-
-
-/*
- * Assign all the hash buckets of the specified table with the service.
- */
-static int
-ip_vs_sh_assign(struct ip_vs_sh_bucket *tbl, struct ip_vs_service *svc)
-{
- int i;
- struct ip_vs_sh_bucket *b;
- struct list_head *p;
- struct ip_vs_dest *dest;
-
- b = tbl;
- p = &svc->destinations;
- for (i=0; i<IP_VS_SH_TAB_SIZE; i++) {
- if (list_empty(p)) {
- b->dest = NULL;
- } else {
- if (p == &svc->destinations)
- p = p->next;
-
- dest = list_entry(p, struct ip_vs_dest, n_list);
- atomic_inc(&dest->refcnt);
- b->dest = dest;
-
- p = p->next;
- }
- b++;
- }
- return 0;
-}
-
-
-/*
- * Flush all the hash buckets of the specified table.
- */
-static void ip_vs_sh_flush(struct ip_vs_sh_bucket *tbl)
-{
- int i;
- struct ip_vs_sh_bucket *b;
-
- b = tbl;
- for (i=0; i<IP_VS_SH_TAB_SIZE; i++) {
- if (b->dest) {
- atomic_dec(&b->dest->refcnt);
- b->dest = NULL;
- }
- b++;
- }
-}
-
-
-static int ip_vs_sh_init_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_sh_bucket *tbl;
-
- /* allocate the SH table for this service */
- tbl = kmalloc(sizeof(struct ip_vs_sh_bucket)*IP_VS_SH_TAB_SIZE,
- GFP_ATOMIC);
- if (tbl == NULL) {
- IP_VS_ERR("ip_vs_sh_init_svc(): no memory\n");
- return -ENOMEM;
- }
- svc->sched_data = tbl;
- IP_VS_DBG(6, "SH hash table (memory=%Zdbytes) allocated for "
- "current service\n",
- sizeof(struct ip_vs_sh_bucket)*IP_VS_SH_TAB_SIZE);
-
- /* assign the hash buckets with the updated service */
- ip_vs_sh_assign(tbl, svc);
-
- return 0;
-}
-
-
-static int ip_vs_sh_done_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_sh_bucket *tbl = svc->sched_data;
-
- /* got to clean up hash buckets here */
- ip_vs_sh_flush(tbl);
-
- /* release the table itself */
- kfree(svc->sched_data);
- IP_VS_DBG(6, "SH hash table (memory=%Zdbytes) released\n",
- sizeof(struct ip_vs_sh_bucket)*IP_VS_SH_TAB_SIZE);
-
- return 0;
-}
-
-
-static int ip_vs_sh_update_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_sh_bucket *tbl = svc->sched_data;
-
- /* got to clean up hash buckets here */
- ip_vs_sh_flush(tbl);
-
- /* assign the hash buckets with the updated service */
- ip_vs_sh_assign(tbl, svc);
-
- return 0;
-}
-
-
-/*
- * If the dest flags is set with IP_VS_DEST_F_OVERLOAD,
- * consider that the server is overloaded here.
- */
-static inline int is_overloaded(struct ip_vs_dest *dest)
-{
- return dest->flags & IP_VS_DEST_F_OVERLOAD;
-}
-
-
-/*
- * Source Hashing scheduling
- */
-static struct ip_vs_dest *
-ip_vs_sh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_sh_bucket *tbl;
- struct iphdr *iph = ip_hdr(skb);
-
- IP_VS_DBG(6, "ip_vs_sh_schedule(): Scheduling...\n");
-
- tbl = (struct ip_vs_sh_bucket *)svc->sched_data;
- dest = ip_vs_sh_get(tbl, iph->saddr);
- if (!dest
- || !(dest->flags & IP_VS_DEST_F_AVAILABLE)
- || atomic_read(&dest->weight) <= 0
- || is_overloaded(dest)) {
- return NULL;
- }
-
- IP_VS_DBG(6, "SH: source IP address %u.%u.%u.%u "
- "--> server %u.%u.%u.%u:%d\n",
- NIPQUAD(iph->saddr),
- NIPQUAD(dest->addr),
- ntohs(dest->port));
-
- return dest;
-}
-
-
-/*
- * IPVS SH Scheduler structure
- */
-static struct ip_vs_scheduler ip_vs_sh_scheduler =
-{
- .name = "sh",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_sh_scheduler.n_list),
- .init_service = ip_vs_sh_init_svc,
- .done_service = ip_vs_sh_done_svc,
- .update_service = ip_vs_sh_update_svc,
- .schedule = ip_vs_sh_schedule,
-};
-
-
-static int __init ip_vs_sh_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_sh_scheduler);
-}
-
-
-static void __exit ip_vs_sh_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_sh_scheduler);
-}
-
-
-module_init(ip_vs_sh_init);
-module_exit(ip_vs_sh_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_sync.c b/net/ipv4/ipvs/ip_vs_sync.c
deleted file mode 100644
index a652da2c320..00000000000
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ /dev/null
@@ -1,930 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the NetFilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * ip_vs_sync: sync connection info from master load balancer to backups
- * through multicast
- *
- * Changes:
- * Alexandre Cassen : Added master & backup support at a time.
- * Alexandre Cassen : Added SyncID support for incoming sync
- * messages filtering.
- * Justin Ossevoort : Fix endian problem on sync message size.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/inetdevice.h>
-#include <linux/net.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/skbuff.h>
-#include <linux/in.h>
-#include <linux/igmp.h> /* for ip_mc_join_group */
-#include <linux/udp.h>
-#include <linux/err.h>
-#include <linux/kthread.h>
-#include <linux/wait.h>
-
-#include <net/ip.h>
-#include <net/sock.h>
-
-#include <net/ip_vs.h>
-
-#define IP_VS_SYNC_GROUP 0xe0000051 /* multicast addr - 224.0.0.81 */
-#define IP_VS_SYNC_PORT 8848 /* multicast port */
-
-
-/*
- * IPVS sync connection entry
- */
-struct ip_vs_sync_conn {
- __u8 reserved;
-
- /* Protocol, addresses and port numbers */
- __u8 protocol; /* Which protocol (TCP/UDP) */
- __be16 cport;
- __be16 vport;
- __be16 dport;
- __be32 caddr; /* client address */
- __be32 vaddr; /* virtual address */
- __be32 daddr; /* destination address */
-
- /* Flags and state transition */
- __be16 flags; /* status flags */
- __be16 state; /* state info */
-
- /* The sequence options start here */
-};
-
-struct ip_vs_sync_conn_options {
- struct ip_vs_seq in_seq; /* incoming seq. struct */
- struct ip_vs_seq out_seq; /* outgoing seq. struct */
-};
-
-struct ip_vs_sync_thread_data {
- struct socket *sock;
- char *buf;
-};
-
-#define SIMPLE_CONN_SIZE (sizeof(struct ip_vs_sync_conn))
-#define FULL_CONN_SIZE \
-(sizeof(struct ip_vs_sync_conn) + sizeof(struct ip_vs_sync_conn_options))
-
-
-/*
- The master mulitcasts messages to the backup load balancers in the
- following format.
-
- 0 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Count Conns | SyncID | Size |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | |
- | IPVS Sync Connection (1) |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | . |
- | . |
- | . |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | |
- | IPVS Sync Connection (n) |
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-*/
-
-#define SYNC_MESG_HEADER_LEN 4
-
-struct ip_vs_sync_mesg {
- __u8 nr_conns;
- __u8 syncid;
- __u16 size;
-
- /* ip_vs_sync_conn entries start here */
-};
-
-/* the maximum length of sync (sending/receiving) message */
-static int sync_send_mesg_maxlen;
-static int sync_recv_mesg_maxlen;
-
-struct ip_vs_sync_buff {
- struct list_head list;
- unsigned long firstuse;
-
- /* pointers for the message data */
- struct ip_vs_sync_mesg *mesg;
- unsigned char *head;
- unsigned char *end;
-};
-
-
-/* the sync_buff list head and the lock */
-static LIST_HEAD(ip_vs_sync_queue);
-static DEFINE_SPINLOCK(ip_vs_sync_lock);
-
-/* current sync_buff for accepting new conn entries */
-static struct ip_vs_sync_buff *curr_sb = NULL;
-static DEFINE_SPINLOCK(curr_sb_lock);
-
-/* ipvs sync daemon state */
-volatile int ip_vs_sync_state = IP_VS_STATE_NONE;
-volatile int ip_vs_master_syncid = 0;
-volatile int ip_vs_backup_syncid = 0;
-
-/* multicast interface name */
-char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
-char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
-
-/* sync daemon tasks */
-static struct task_struct *sync_master_thread;
-static struct task_struct *sync_backup_thread;
-
-/* multicast addr */
-static struct sockaddr_in mcast_addr = {
- .sin_family = AF_INET,
- .sin_port = __constant_htons(IP_VS_SYNC_PORT),
- .sin_addr.s_addr = __constant_htonl(IP_VS_SYNC_GROUP),
-};
-
-
-static inline struct ip_vs_sync_buff *sb_dequeue(void)
-{
- struct ip_vs_sync_buff *sb;
-
- spin_lock_bh(&ip_vs_sync_lock);
- if (list_empty(&ip_vs_sync_queue)) {
- sb = NULL;
- } else {
- sb = list_entry(ip_vs_sync_queue.next,
- struct ip_vs_sync_buff,
- list);
- list_del(&sb->list);
- }
- spin_unlock_bh(&ip_vs_sync_lock);
-
- return sb;
-}
-
-static inline struct ip_vs_sync_buff * ip_vs_sync_buff_create(void)
-{
- struct ip_vs_sync_buff *sb;
-
- if (!(sb=kmalloc(sizeof(struct ip_vs_sync_buff), GFP_ATOMIC)))
- return NULL;
-
- if (!(sb->mesg=kmalloc(sync_send_mesg_maxlen, GFP_ATOMIC))) {
- kfree(sb);
- return NULL;
- }
- sb->mesg->nr_conns = 0;
- sb->mesg->syncid = ip_vs_master_syncid;
- sb->mesg->size = 4;
- sb->head = (unsigned char *)sb->mesg + 4;
- sb->end = (unsigned char *)sb->mesg + sync_send_mesg_maxlen;
- sb->firstuse = jiffies;
- return sb;
-}
-
-static inline void ip_vs_sync_buff_release(struct ip_vs_sync_buff *sb)
-{
- kfree(sb->mesg);
- kfree(sb);
-}
-
-static inline void sb_queue_tail(struct ip_vs_sync_buff *sb)
-{
- spin_lock(&ip_vs_sync_lock);
- if (ip_vs_sync_state & IP_VS_STATE_MASTER)
- list_add_tail(&sb->list, &ip_vs_sync_queue);
- else
- ip_vs_sync_buff_release(sb);
- spin_unlock(&ip_vs_sync_lock);
-}
-
-/*
- * Get the current sync buffer if it has been created for more
- * than the specified time or the specified time is zero.
- */
-static inline struct ip_vs_sync_buff *
-get_curr_sync_buff(unsigned long time)
-{
- struct ip_vs_sync_buff *sb;
-
- spin_lock_bh(&curr_sb_lock);
- if (curr_sb && (time == 0 ||
- time_before(jiffies - curr_sb->firstuse, time))) {
- sb = curr_sb;
- curr_sb = NULL;
- } else
- sb = NULL;
- spin_unlock_bh(&curr_sb_lock);
- return sb;
-}
-
-
-/*
- * Add an ip_vs_conn information into the current sync_buff.
- * Called by ip_vs_in.
- */
-void ip_vs_sync_conn(struct ip_vs_conn *cp)
-{
- struct ip_vs_sync_mesg *m;
- struct ip_vs_sync_conn *s;
- int len;
-
- spin_lock(&curr_sb_lock);
- if (!curr_sb) {
- if (!(curr_sb=ip_vs_sync_buff_create())) {
- spin_unlock(&curr_sb_lock);
- IP_VS_ERR("ip_vs_sync_buff_create failed.\n");
- return;
- }
- }
-
- len = (cp->flags & IP_VS_CONN_F_SEQ_MASK) ? FULL_CONN_SIZE :
- SIMPLE_CONN_SIZE;
- m = curr_sb->mesg;
- s = (struct ip_vs_sync_conn *)curr_sb->head;
-
- /* copy members */
- s->protocol = cp->protocol;
- s->cport = cp->cport;
- s->vport = cp->vport;
- s->dport = cp->dport;
- s->caddr = cp->caddr;
- s->vaddr = cp->vaddr;
- s->daddr = cp->daddr;
- s->flags = htons(cp->flags & ~IP_VS_CONN_F_HASHED);
- s->state = htons(cp->state);
- if (cp->flags & IP_VS_CONN_F_SEQ_MASK) {
- struct ip_vs_sync_conn_options *opt =
- (struct ip_vs_sync_conn_options *)&s[1];
- memcpy(opt, &cp->in_seq, sizeof(*opt));
- }
-
- m->nr_conns++;
- m->size += len;
- curr_sb->head += len;
-
- /* check if there is a space for next one */
- if (curr_sb->head+FULL_CONN_SIZE > curr_sb->end) {
- sb_queue_tail(curr_sb);
- curr_sb = NULL;
- }
- spin_unlock(&curr_sb_lock);
-
- /* synchronize its controller if it has */
- if (cp->control)
- ip_vs_sync_conn(cp->control);
-}
-
-
-/*
- * Process received multicast message and create the corresponding
- * ip_vs_conn entries.
- */
-static void ip_vs_process_message(const char *buffer, const size_t buflen)
-{
- struct ip_vs_sync_mesg *m = (struct ip_vs_sync_mesg *)buffer;
- struct ip_vs_sync_conn *s;
- struct ip_vs_sync_conn_options *opt;
- struct ip_vs_conn *cp;
- struct ip_vs_protocol *pp;
- struct ip_vs_dest *dest;
- char *p;
- int i;
-
- if (buflen < sizeof(struct ip_vs_sync_mesg)) {
- IP_VS_ERR_RL("sync message header too short\n");
- return;
- }
-
- /* Convert size back to host byte order */
- m->size = ntohs(m->size);
-
- if (buflen != m->size) {
- IP_VS_ERR_RL("bogus sync message size\n");
- return;
- }
-
- /* SyncID sanity check */
- if (ip_vs_backup_syncid != 0 && m->syncid != ip_vs_backup_syncid) {
- IP_VS_DBG(7, "Ignoring incoming msg with syncid = %d\n",
- m->syncid);
- return;
- }
-
- p = (char *)buffer + sizeof(struct ip_vs_sync_mesg);
- for (i=0; i<m->nr_conns; i++) {
- unsigned flags, state;
-
- if (p + SIMPLE_CONN_SIZE > buffer+buflen) {
- IP_VS_ERR_RL("bogus conn in sync message\n");
- return;
- }
- s = (struct ip_vs_sync_conn *) p;
- flags = ntohs(s->flags) | IP_VS_CONN_F_SYNC;
- flags &= ~IP_VS_CONN_F_HASHED;
- if (flags & IP_VS_CONN_F_SEQ_MASK) {
- opt = (struct ip_vs_sync_conn_options *)&s[1];
- p += FULL_CONN_SIZE;
- if (p > buffer+buflen) {
- IP_VS_ERR_RL("bogus conn options in sync message\n");
- return;
- }
- } else {
- opt = NULL;
- p += SIMPLE_CONN_SIZE;
- }
-
- state = ntohs(s->state);
- if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
- pp = ip_vs_proto_get(s->protocol);
- if (!pp) {
- IP_VS_ERR_RL("Unsupported protocol %u in sync msg\n",
- s->protocol);
- continue;
- }
- if (state >= pp->num_states) {
- IP_VS_DBG(2, "Invalid %s state %u in sync msg\n",
- pp->name, state);
- continue;
- }
- } else {
- /* protocol in templates is not used for state/timeout */
- pp = NULL;
- if (state > 0) {
- IP_VS_DBG(2, "Invalid template state %u in sync msg\n",
- state);
- state = 0;
- }
- }
-
- if (!(flags & IP_VS_CONN_F_TEMPLATE))
- cp = ip_vs_conn_in_get(s->protocol,
- s->caddr, s->cport,
- s->vaddr, s->vport);
- else
- cp = ip_vs_ct_in_get(s->protocol,
- s->caddr, s->cport,
- s->vaddr, s->vport);
- if (!cp) {
- /*
- * Find the appropriate destination for the connection.
- * If it is not found the connection will remain unbound
- * but still handled.
- */
- dest = ip_vs_find_dest(s->daddr, s->dport,
- s->vaddr, s->vport,
- s->protocol);
- /* Set the approprite ativity flag */
- if (s->protocol == IPPROTO_TCP) {
- if (state != IP_VS_TCP_S_ESTABLISHED)
- flags |= IP_VS_CONN_F_INACTIVE;
- else
- flags &= ~IP_VS_CONN_F_INACTIVE;
- }
- cp = ip_vs_conn_new(s->protocol,
- s->caddr, s->cport,
- s->vaddr, s->vport,
- s->daddr, s->dport,
- flags, dest);
- if (dest)
- atomic_dec(&dest->refcnt);
- if (!cp) {
- IP_VS_ERR("ip_vs_conn_new failed\n");
- return;
- }
- } else if (!cp->dest) {
- dest = ip_vs_try_bind_dest(cp);
- if (dest)
- atomic_dec(&dest->refcnt);
- } else if ((cp->dest) && (cp->protocol == IPPROTO_TCP) &&
- (cp->state != state)) {
- /* update active/inactive flag for the connection */
- dest = cp->dest;
- if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (state != IP_VS_TCP_S_ESTABLISHED)) {
- atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
- cp->flags |= IP_VS_CONN_F_INACTIVE;
- } else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
- (state == IP_VS_TCP_S_ESTABLISHED)) {
- atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
- cp->flags &= ~IP_VS_CONN_F_INACTIVE;
- }
- }
-
- if (opt)
- memcpy(&cp->in_seq, opt, sizeof(*opt));
- atomic_set(&cp->in_pkts, sysctl_ip_vs_sync_threshold[0]);
- cp->state = state;
- cp->old_state = cp->state;
- /*
- * We can not recover the right timeout for templates
- * in all cases, we can not find the right fwmark
- * virtual service. If needed, we can do it for
- * non-fwmark persistent services.
- */
- if (!(flags & IP_VS_CONN_F_TEMPLATE) && pp->timeout_table)
- cp->timeout = pp->timeout_table[state];
- else
- cp->timeout = (3*60*HZ);
- ip_vs_conn_put(cp);
- }
-}
-
-
-/*
- * Setup loopback of outgoing multicasts on a sending socket
- */
-static void set_mcast_loop(struct sock *sk, u_char loop)
-{
- struct inet_sock *inet = inet_sk(sk);
-
- /* setsockopt(sock, SOL_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop)); */
- lock_sock(sk);
- inet->mc_loop = loop ? 1 : 0;
- release_sock(sk);
-}
-
-/*
- * Specify TTL for outgoing multicasts on a sending socket
- */
-static void set_mcast_ttl(struct sock *sk, u_char ttl)
-{
- struct inet_sock *inet = inet_sk(sk);
-
- /* setsockopt(sock, SOL_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)); */
- lock_sock(sk);
- inet->mc_ttl = ttl;
- release_sock(sk);
-}
-
-/*
- * Specifiy default interface for outgoing multicasts
- */
-static int set_mcast_if(struct sock *sk, char *ifname)
-{
- struct net_device *dev;
- struct inet_sock *inet = inet_sk(sk);
-
- if ((dev = __dev_get_by_name(&init_net, ifname)) == NULL)
- return -ENODEV;
-
- if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if)
- return -EINVAL;
-
- lock_sock(sk);
- inet->mc_index = dev->ifindex;
- /* inet->mc_addr = 0; */
- release_sock(sk);
-
- return 0;
-}
-
-
-/*
- * Set the maximum length of sync message according to the
- * specified interface's MTU.
- */
-static int set_sync_mesg_maxlen(int sync_state)
-{
- struct net_device *dev;
- int num;
-
- if (sync_state == IP_VS_STATE_MASTER) {
- if ((dev = __dev_get_by_name(&init_net, ip_vs_master_mcast_ifn)) == NULL)
- return -ENODEV;
-
- num = (dev->mtu - sizeof(struct iphdr) -
- sizeof(struct udphdr) -
- SYNC_MESG_HEADER_LEN - 20) / SIMPLE_CONN_SIZE;
- sync_send_mesg_maxlen =
- SYNC_MESG_HEADER_LEN + SIMPLE_CONN_SIZE * num;
- IP_VS_DBG(7, "setting the maximum length of sync sending "
- "message %d.\n", sync_send_mesg_maxlen);
- } else if (sync_state == IP_VS_STATE_BACKUP) {
- if ((dev = __dev_get_by_name(&init_net, ip_vs_backup_mcast_ifn)) == NULL)
- return -ENODEV;
-
- sync_recv_mesg_maxlen = dev->mtu -
- sizeof(struct iphdr) - sizeof(struct udphdr);
- IP_VS_DBG(7, "setting the maximum length of sync receiving "
- "message %d.\n", sync_recv_mesg_maxlen);
- }
-
- return 0;
-}
-
-
-/*
- * Join a multicast group.
- * the group is specified by a class D multicast address 224.0.0.0/8
- * in the in_addr structure passed in as a parameter.
- */
-static int
-join_mcast_group(struct sock *sk, struct in_addr *addr, char *ifname)
-{
- struct ip_mreqn mreq;
- struct net_device *dev;
- int ret;
-
- memset(&mreq, 0, sizeof(mreq));
- memcpy(&mreq.imr_multiaddr, addr, sizeof(struct in_addr));
-
- if ((dev = __dev_get_by_name(&init_net, ifname)) == NULL)
- return -ENODEV;
- if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if)
- return -EINVAL;
-
- mreq.imr_ifindex = dev->ifindex;
-
- lock_sock(sk);
- ret = ip_mc_join_group(sk, &mreq);
- release_sock(sk);
-
- return ret;
-}
-
-
-static int bind_mcastif_addr(struct socket *sock, char *ifname)
-{
- struct net_device *dev;
- __be32 addr;
- struct sockaddr_in sin;
-
- if ((dev = __dev_get_by_name(&init_net, ifname)) == NULL)
- return -ENODEV;
-
- addr = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE);
- if (!addr)
- IP_VS_ERR("You probably need to specify IP address on "
- "multicast interface.\n");
-
- IP_VS_DBG(7, "binding socket with (%s) %u.%u.%u.%u\n",
- ifname, NIPQUAD(addr));
-
- /* Now bind the socket with the address of multicast interface */
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = addr;
- sin.sin_port = 0;
-
- return sock->ops->bind(sock, (struct sockaddr*)&sin, sizeof(sin));
-}
-
-/*
- * Set up sending multicast socket over UDP
- */
-static struct socket * make_send_sock(void)
-{
- struct socket *sock;
- int result;
-
- /* First create a socket */
- result = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);
- if (result < 0) {
- IP_VS_ERR("Error during creation of socket; terminating\n");
- return ERR_PTR(result);
- }
-
- result = set_mcast_if(sock->sk, ip_vs_master_mcast_ifn);
- if (result < 0) {
- IP_VS_ERR("Error setting outbound mcast interface\n");
- goto error;
- }
-
- set_mcast_loop(sock->sk, 0);
- set_mcast_ttl(sock->sk, 1);
-
- result = bind_mcastif_addr(sock, ip_vs_master_mcast_ifn);
- if (result < 0) {
- IP_VS_ERR("Error binding address of the mcast interface\n");
- goto error;
- }
-
- result = sock->ops->connect(sock, (struct sockaddr *) &mcast_addr,
- sizeof(struct sockaddr), 0);
- if (result < 0) {
- IP_VS_ERR("Error connecting to the multicast addr\n");
- goto error;
- }
-
- return sock;
-
- error:
- sock_release(sock);
- return ERR_PTR(result);
-}
-
-
-/*
- * Set up receiving multicast socket over UDP
- */
-static struct socket * make_receive_sock(void)
-{
- struct socket *sock;
- int result;
-
- /* First create a socket */
- result = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);
- if (result < 0) {
- IP_VS_ERR("Error during creation of socket; terminating\n");
- return ERR_PTR(result);
- }
-
- /* it is equivalent to the REUSEADDR option in user-space */
- sock->sk->sk_reuse = 1;
-
- result = sock->ops->bind(sock, (struct sockaddr *) &mcast_addr,
- sizeof(struct sockaddr));
- if (result < 0) {
- IP_VS_ERR("Error binding to the multicast addr\n");
- goto error;
- }
-
- /* join the multicast group */
- result = join_mcast_group(sock->sk,
- (struct in_addr *) &mcast_addr.sin_addr,
- ip_vs_backup_mcast_ifn);
- if (result < 0) {
- IP_VS_ERR("Error joining to the multicast group\n");
- goto error;
- }
-
- return sock;
-
- error:
- sock_release(sock);
- return ERR_PTR(result);
-}
-
-
-static int
-ip_vs_send_async(struct socket *sock, const char *buffer, const size_t length)
-{
- struct msghdr msg = {.msg_flags = MSG_DONTWAIT|MSG_NOSIGNAL};
- struct kvec iov;
- int len;
-
- EnterFunction(7);
- iov.iov_base = (void *)buffer;
- iov.iov_len = length;
-
- len = kernel_sendmsg(sock, &msg, &iov, 1, (size_t)(length));
-
- LeaveFunction(7);
- return len;
-}
-
-static void
-ip_vs_send_sync_msg(struct socket *sock, struct ip_vs_sync_mesg *msg)
-{
- int msize;
-
- msize = msg->size;
-
- /* Put size in network byte order */
- msg->size = htons(msg->size);
-
- if (ip_vs_send_async(sock, (char *)msg, msize) != msize)
- IP_VS_ERR("ip_vs_send_async error\n");
-}
-
-static int
-ip_vs_receive(struct socket *sock, char *buffer, const size_t buflen)
-{
- struct msghdr msg = {NULL,};
- struct kvec iov;
- int len;
-
- EnterFunction(7);
-
- /* Receive a packet */
- iov.iov_base = buffer;
- iov.iov_len = (size_t)buflen;
-
- len = kernel_recvmsg(sock, &msg, &iov, 1, buflen, 0);
-
- if (len < 0)
- return -1;
-
- LeaveFunction(7);
- return len;
-}
-
-
-static int sync_thread_master(void *data)
-{
- struct ip_vs_sync_thread_data *tinfo = data;
- struct ip_vs_sync_buff *sb;
-
- IP_VS_INFO("sync thread started: state = MASTER, mcast_ifn = %s, "
- "syncid = %d\n",
- ip_vs_master_mcast_ifn, ip_vs_master_syncid);
-
- while (!kthread_should_stop()) {
- while ((sb = sb_dequeue())) {
- ip_vs_send_sync_msg(tinfo->sock, sb->mesg);
- ip_vs_sync_buff_release(sb);
- }
-
- /* check if entries stay in curr_sb for 2 seconds */
- sb = get_curr_sync_buff(2 * HZ);
- if (sb) {
- ip_vs_send_sync_msg(tinfo->sock, sb->mesg);
- ip_vs_sync_buff_release(sb);
- }
-
- schedule_timeout_interruptible(HZ);
- }
-
- /* clean up the sync_buff queue */
- while ((sb=sb_dequeue())) {
- ip_vs_sync_buff_release(sb);
- }
-
- /* clean up the current sync_buff */
- if ((sb = get_curr_sync_buff(0))) {
- ip_vs_sync_buff_release(sb);
- }
-
- /* release the sending multicast socket */
- sock_release(tinfo->sock);
- kfree(tinfo);
-
- return 0;
-}
-
-
-static int sync_thread_backup(void *data)
-{
- struct ip_vs_sync_thread_data *tinfo = data;
- int len;
-
- IP_VS_INFO("sync thread started: state = BACKUP, mcast_ifn = %s, "
- "syncid = %d\n",
- ip_vs_backup_mcast_ifn, ip_vs_backup_syncid);
-
- while (!kthread_should_stop()) {
- wait_event_interruptible(*tinfo->sock->sk->sk_sleep,
- !skb_queue_empty(&tinfo->sock->sk->sk_receive_queue)
- || kthread_should_stop());
-
- /* do we have data now? */
- while (!skb_queue_empty(&(tinfo->sock->sk->sk_receive_queue))) {
- len = ip_vs_receive(tinfo->sock, tinfo->buf,
- sync_recv_mesg_maxlen);
- if (len <= 0) {
- IP_VS_ERR("receiving message error\n");
- break;
- }
-
- /* disable bottom half, because it accesses the data
- shared by softirq while getting/creating conns */
- local_bh_disable();
- ip_vs_process_message(tinfo->buf, len);
- local_bh_enable();
- }
- }
-
- /* release the sending multicast socket */
- sock_release(tinfo->sock);
- kfree(tinfo->buf);
- kfree(tinfo);
-
- return 0;
-}
-
-
-int start_sync_thread(int state, char *mcast_ifn, __u8 syncid)
-{
- struct ip_vs_sync_thread_data *tinfo;
- struct task_struct **realtask, *task;
- struct socket *sock;
- char *name, *buf = NULL;
- int (*threadfn)(void *data);
- int result = -ENOMEM;
-
- IP_VS_DBG(7, "%s: pid %d\n", __func__, task_pid_nr(current));
- IP_VS_DBG(7, "Each ip_vs_sync_conn entry needs %Zd bytes\n",
- sizeof(struct ip_vs_sync_conn));
-
- if (state == IP_VS_STATE_MASTER) {
- if (sync_master_thread)
- return -EEXIST;
-
- strlcpy(ip_vs_master_mcast_ifn, mcast_ifn,
- sizeof(ip_vs_master_mcast_ifn));
- ip_vs_master_syncid = syncid;
- realtask = &sync_master_thread;
- name = "ipvs_syncmaster";
- threadfn = sync_thread_master;
- sock = make_send_sock();
- } else if (state == IP_VS_STATE_BACKUP) {
- if (sync_backup_thread)
- return -EEXIST;
-
- strlcpy(ip_vs_backup_mcast_ifn, mcast_ifn,
- sizeof(ip_vs_backup_mcast_ifn));
- ip_vs_backup_syncid = syncid;
- realtask = &sync_backup_thread;
- name = "ipvs_syncbackup";
- threadfn = sync_thread_backup;
- sock = make_receive_sock();
- } else {
- return -EINVAL;
- }
-
- if (IS_ERR(sock)) {
- result = PTR_ERR(sock);
- goto out;
- }
-
- set_sync_mesg_maxlen(state);
- if (state == IP_VS_STATE_BACKUP) {
- buf = kmalloc(sync_recv_mesg_maxlen, GFP_KERNEL);
- if (!buf)
- goto outsocket;
- }
-
- tinfo = kmalloc(sizeof(*tinfo), GFP_KERNEL);
- if (!tinfo)
- goto outbuf;
-
- tinfo->sock = sock;
- tinfo->buf = buf;
-
- task = kthread_run(threadfn, tinfo, name);
- if (IS_ERR(task)) {
- result = PTR_ERR(task);
- goto outtinfo;
- }
-
- /* mark as active */
- *realtask = task;
- ip_vs_sync_state |= state;
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- return 0;
-
-outtinfo:
- kfree(tinfo);
-outbuf:
- kfree(buf);
-outsocket:
- sock_release(sock);
-out:
- return result;
-}
-
-
-int stop_sync_thread(int state)
-{
- IP_VS_DBG(7, "%s: pid %d\n", __func__, task_pid_nr(current));
-
- if (state == IP_VS_STATE_MASTER) {
- if (!sync_master_thread)
- return -ESRCH;
-
- IP_VS_INFO("stopping master sync thread %d ...\n",
- task_pid_nr(sync_master_thread));
-
- /*
- * The lock synchronizes with sb_queue_tail(), so that we don't
- * add sync buffers to the queue, when we are already in
- * progress of stopping the master sync daemon.
- */
-
- spin_lock_bh(&ip_vs_sync_lock);
- ip_vs_sync_state &= ~IP_VS_STATE_MASTER;
- spin_unlock_bh(&ip_vs_sync_lock);
- kthread_stop(sync_master_thread);
- sync_master_thread = NULL;
- } else if (state == IP_VS_STATE_BACKUP) {
- if (!sync_backup_thread)
- return -ESRCH;
-
- IP_VS_INFO("stopping backup sync thread %d ...\n",
- task_pid_nr(sync_backup_thread));
-
- ip_vs_sync_state &= ~IP_VS_STATE_BACKUP;
- kthread_stop(sync_backup_thread);
- sync_backup_thread = NULL;
- } else {
- return -EINVAL;
- }
-
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- return 0;
-}
diff --git a/net/ipv4/ipvs/ip_vs_wlc.c b/net/ipv4/ipvs/ip_vs_wlc.c
deleted file mode 100644
index 9b0ef86bb1f..00000000000
--- a/net/ipv4/ipvs/ip_vs_wlc.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * IPVS: Weighted Least-Connection Scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Wensong Zhang : changed the ip_vs_wlc_schedule to return dest
- * Wensong Zhang : changed to use the inactconns in scheduling
- * Wensong Zhang : changed some comestics things for debugging
- * Wensong Zhang : changed for the d-linked destination list
- * Wensong Zhang : added the ip_vs_wlc_update_svc
- * Wensong Zhang : added any dest with weight=0 is quiesced
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static int
-ip_vs_wlc_init_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_wlc_done_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static int
-ip_vs_wlc_update_svc(struct ip_vs_service *svc)
-{
- return 0;
-}
-
-
-static inline unsigned int
-ip_vs_wlc_dest_overhead(struct ip_vs_dest *dest)
-{
- /*
- * We think the overhead of processing active connections is 256
- * times higher than that of inactive connections in average. (This
- * 256 times might not be accurate, we will change it later) We
- * use the following formula to estimate the overhead now:
- * dest->activeconns*256 + dest->inactconns
- */
- return (atomic_read(&dest->activeconns) << 8) +
- atomic_read(&dest->inactconns);
-}
-
-
-/*
- * Weighted Least Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_wlc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest, *least;
- unsigned int loh, doh;
-
- IP_VS_DBG(6, "ip_vs_wlc_schedule(): Scheduling...\n");
-
- /*
- * We calculate the load of each dest server as follows:
- * (dest overhead) / dest->weight
- *
- * Remember -- no floats in kernel mode!!!
- * The comparison of h1*w2 > h2*w1 is equivalent to that of
- * h1/w1 > h2/w2
- * if every weight is larger than zero.
- *
- * The server with weight=0 is quiesced and will not receive any
- * new connections.
- */
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
- atomic_read(&dest->weight) > 0) {
- least = dest;
- loh = ip_vs_wlc_dest_overhead(least);
- goto nextstage;
- }
- }
- return NULL;
-
- /*
- * Find the destination with the least load.
- */
- nextstage:
- list_for_each_entry_continue(dest, &svc->destinations, n_list) {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- continue;
- doh = ip_vs_wlc_dest_overhead(dest);
- if (loh * atomic_read(&dest->weight) >
- doh * atomic_read(&least->weight)) {
- least = dest;
- loh = doh;
- }
- }
-
- IP_VS_DBG(6, "WLC: server %u.%u.%u.%u:%u "
- "activeconns %d refcnt %d weight %d overhead %d\n",
- NIPQUAD(least->addr), ntohs(least->port),
- atomic_read(&least->activeconns),
- atomic_read(&least->refcnt),
- atomic_read(&least->weight), loh);
-
- return least;
-}
-
-
-static struct ip_vs_scheduler ip_vs_wlc_scheduler =
-{
- .name = "wlc",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_wlc_scheduler.n_list),
- .init_service = ip_vs_wlc_init_svc,
- .done_service = ip_vs_wlc_done_svc,
- .update_service = ip_vs_wlc_update_svc,
- .schedule = ip_vs_wlc_schedule,
-};
-
-
-static int __init ip_vs_wlc_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_wlc_scheduler);
-}
-
-static void __exit ip_vs_wlc_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_wlc_scheduler);
-}
-
-module_init(ip_vs_wlc_init);
-module_exit(ip_vs_wlc_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_wrr.c b/net/ipv4/ipvs/ip_vs_wrr.c
deleted file mode 100644
index 0d86a79b87b..00000000000
--- a/net/ipv4/ipvs/ip_vs_wrr.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * IPVS: Weighted Round-Robin Scheduling module
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- * Wensong Zhang : changed the ip_vs_wrr_schedule to return dest
- * Wensong Zhang : changed some comestics things for debugging
- * Wensong Zhang : changed for the d-linked destination list
- * Wensong Zhang : added the ip_vs_wrr_update_svc
- * Julian Anastasov : fixed the bug of returning destination
- * with weight 0 when all weights are zero
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/net.h>
-
-#include <net/ip_vs.h>
-
-/*
- * current destination pointer for weighted round-robin scheduling
- */
-struct ip_vs_wrr_mark {
- struct list_head *cl; /* current list head */
- int cw; /* current weight */
- int mw; /* maximum weight */
- int di; /* decreasing interval */
-};
-
-
-/*
- * Get the gcd of server weights
- */
-static int gcd(int a, int b)
-{
- int c;
-
- while ((c = a % b)) {
- a = b;
- b = c;
- }
- return b;
-}
-
-static int ip_vs_wrr_gcd_weight(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest;
- int weight;
- int g = 0;
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- weight = atomic_read(&dest->weight);
- if (weight > 0) {
- if (g > 0)
- g = gcd(weight, g);
- else
- g = weight;
- }
- }
- return g ? g : 1;
-}
-
-
-/*
- * Get the maximum weight of the service destinations.
- */
-static int ip_vs_wrr_max_weight(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest;
- int weight = 0;
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (atomic_read(&dest->weight) > weight)
- weight = atomic_read(&dest->weight);
- }
-
- return weight;
-}
-
-
-static int ip_vs_wrr_init_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_wrr_mark *mark;
-
- /*
- * Allocate the mark variable for WRR scheduling
- */
- mark = kmalloc(sizeof(struct ip_vs_wrr_mark), GFP_ATOMIC);
- if (mark == NULL) {
- IP_VS_ERR("ip_vs_wrr_init_svc(): no memory\n");
- return -ENOMEM;
- }
- mark->cl = &svc->destinations;
- mark->cw = 0;
- mark->mw = ip_vs_wrr_max_weight(svc);
- mark->di = ip_vs_wrr_gcd_weight(svc);
- svc->sched_data = mark;
-
- return 0;
-}
-
-
-static int ip_vs_wrr_done_svc(struct ip_vs_service *svc)
-{
- /*
- * Release the mark variable
- */
- kfree(svc->sched_data);
-
- return 0;
-}
-
-
-static int ip_vs_wrr_update_svc(struct ip_vs_service *svc)
-{
- struct ip_vs_wrr_mark *mark = svc->sched_data;
-
- mark->cl = &svc->destinations;
- mark->mw = ip_vs_wrr_max_weight(svc);
- mark->di = ip_vs_wrr_gcd_weight(svc);
- if (mark->cw > mark->mw)
- mark->cw = 0;
- return 0;
-}
-
-
-/*
- * Weighted Round-Robin Scheduling
- */
-static struct ip_vs_dest *
-ip_vs_wrr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_wrr_mark *mark = svc->sched_data;
- struct list_head *p;
-
- IP_VS_DBG(6, "ip_vs_wrr_schedule(): Scheduling...\n");
-
- /*
- * This loop will always terminate, because mark->cw in (0, max_weight]
- * and at least one server has its weight equal to max_weight.
- */
- write_lock(&svc->sched_lock);
- p = mark->cl;
- while (1) {
- if (mark->cl == &svc->destinations) {
- /* it is at the head of the destination list */
-
- if (mark->cl == mark->cl->next) {
- /* no dest entry */
- dest = NULL;
- goto out;
- }
-
- mark->cl = svc->destinations.next;
- mark->cw -= mark->di;
- if (mark->cw <= 0) {
- mark->cw = mark->mw;
- /*
- * Still zero, which means no available servers.
- */
- if (mark->cw == 0) {
- mark->cl = &svc->destinations;
- IP_VS_ERR_RL("ip_vs_wrr_schedule(): "
- "no available servers\n");
- dest = NULL;
- goto out;
- }
- }
- } else
- mark->cl = mark->cl->next;
-
- if (mark->cl != &svc->destinations) {
- /* not at the head of the list */
- dest = list_entry(mark->cl, struct ip_vs_dest, n_list);
- if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
- atomic_read(&dest->weight) >= mark->cw) {
- /* got it */
- break;
- }
- }
-
- if (mark->cl == p && mark->cw == mark->di) {
- /* back to the start, and no dest is found.
- It is only possible when all dests are OVERLOADED */
- dest = NULL;
- goto out;
- }
- }
-
- IP_VS_DBG(6, "WRR: server %u.%u.%u.%u:%u "
- "activeconns %d refcnt %d weight %d\n",
- NIPQUAD(dest->addr), ntohs(dest->port),
- atomic_read(&dest->activeconns),
- atomic_read(&dest->refcnt),
- atomic_read(&dest->weight));
-
- out:
- write_unlock(&svc->sched_lock);
- return dest;
-}
-
-
-static struct ip_vs_scheduler ip_vs_wrr_scheduler = {
- .name = "wrr",
- .refcnt = ATOMIC_INIT(0),
- .module = THIS_MODULE,
- .n_list = LIST_HEAD_INIT(ip_vs_wrr_scheduler.n_list),
- .init_service = ip_vs_wrr_init_svc,
- .done_service = ip_vs_wrr_done_svc,
- .update_service = ip_vs_wrr_update_svc,
- .schedule = ip_vs_wrr_schedule,
-};
-
-static int __init ip_vs_wrr_init(void)
-{
- return register_ip_vs_scheduler(&ip_vs_wrr_scheduler) ;
-}
-
-static void __exit ip_vs_wrr_cleanup(void)
-{
- unregister_ip_vs_scheduler(&ip_vs_wrr_scheduler);
-}
-
-module_init(ip_vs_wrr_init);
-module_exit(ip_vs_wrr_cleanup);
-MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_xmit.c b/net/ipv4/ipvs/ip_vs_xmit.c
deleted file mode 100644
index 9892d4aca42..00000000000
--- a/net/ipv4/ipvs/ip_vs_xmit.c
+++ /dev/null
@@ -1,559 +0,0 @@
-/*
- * ip_vs_xmit.c: various packet transmitters for IPVS
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Julian Anastasov <ja@ssi.bg>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/tcp.h> /* for tcphdr */
-#include <net/ip.h>
-#include <net/tcp.h> /* for csum_tcpudp_magic */
-#include <net/udp.h>
-#include <net/icmp.h> /* for icmp_send */
-#include <net/route.h> /* for ip_route_output */
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-/*
- * Destination cache to speed up outgoing route lookup
- */
-static inline void
-__ip_vs_dst_set(struct ip_vs_dest *dest, u32 rtos, struct dst_entry *dst)
-{
- struct dst_entry *old_dst;
-
- old_dst = dest->dst_cache;
- dest->dst_cache = dst;
- dest->dst_rtos = rtos;
- dst_release(old_dst);
-}
-
-static inline struct dst_entry *
-__ip_vs_dst_check(struct ip_vs_dest *dest, u32 rtos, u32 cookie)
-{
- struct dst_entry *dst = dest->dst_cache;
-
- if (!dst)
- return NULL;
- if ((dst->obsolete || rtos != dest->dst_rtos) &&
- dst->ops->check(dst, cookie) == NULL) {
- dest->dst_cache = NULL;
- dst_release(dst);
- return NULL;
- }
- dst_hold(dst);
- return dst;
-}
-
-static struct rtable *
-__ip_vs_get_out_rt(struct ip_vs_conn *cp, u32 rtos)
-{
- struct rtable *rt; /* Route to the other host */
- struct ip_vs_dest *dest = cp->dest;
-
- if (dest) {
- spin_lock(&dest->dst_lock);
- if (!(rt = (struct rtable *)
- __ip_vs_dst_check(dest, rtos, 0))) {
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip4_u = {
- .daddr = dest->addr,
- .saddr = 0,
- .tos = rtos, } },
- };
-
- if (ip_route_output_key(&init_net, &rt, &fl)) {
- spin_unlock(&dest->dst_lock);
- IP_VS_DBG_RL("ip_route_output error, "
- "dest: %u.%u.%u.%u\n",
- NIPQUAD(dest->addr));
- return NULL;
- }
- __ip_vs_dst_set(dest, rtos, dst_clone(&rt->u.dst));
- IP_VS_DBG(10, "new dst %u.%u.%u.%u, refcnt=%d, rtos=%X\n",
- NIPQUAD(dest->addr),
- atomic_read(&rt->u.dst.__refcnt), rtos);
- }
- spin_unlock(&dest->dst_lock);
- } else {
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip4_u = {
- .daddr = cp->daddr,
- .saddr = 0,
- .tos = rtos, } },
- };
-
- if (ip_route_output_key(&init_net, &rt, &fl)) {
- IP_VS_DBG_RL("ip_route_output error, dest: "
- "%u.%u.%u.%u\n", NIPQUAD(cp->daddr));
- return NULL;
- }
- }
-
- return rt;
-}
-
-
-/*
- * Release dest->dst_cache before a dest is removed
- */
-void
-ip_vs_dst_reset(struct ip_vs_dest *dest)
-{
- struct dst_entry *old_dst;
-
- old_dst = dest->dst_cache;
- dest->dst_cache = NULL;
- dst_release(old_dst);
-}
-
-#define IP_VS_XMIT(skb, rt) \
-do { \
- (skb)->ipvs_property = 1; \
- skb_forward_csum(skb); \
- NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, (skb), NULL, \
- (rt)->u.dst.dev, dst_output); \
-} while (0)
-
-
-/*
- * NULL transmitter (do nothing except return NF_ACCEPT)
- */
-int
-ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
-{
- /* we do not touch skb and do not need pskb ptr */
- return NF_ACCEPT;
-}
-
-
-/*
- * Bypass transmitter
- * Let packets bypass the destination when the destination is not
- * available, it may be only used in transparent cache cluster.
- */
-int
-ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
-{
- struct rtable *rt; /* Route to the other host */
- struct iphdr *iph = ip_hdr(skb);
- u8 tos = iph->tos;
- int mtu;
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip4_u = {
- .daddr = iph->daddr,
- .saddr = 0,
- .tos = RT_TOS(tos), } },
- };
-
- EnterFunction(10);
-
- if (ip_route_output_key(&init_net, &rt, &fl)) {
- IP_VS_DBG_RL("ip_vs_bypass_xmit(): ip_route_output error, "
- "dest: %u.%u.%u.%u\n", NIPQUAD(iph->daddr));
- goto tx_error_icmp;
- }
-
- /* MTU checking */
- mtu = dst_mtu(&rt->u.dst);
- if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF))) {
- ip_rt_put(rt);
- icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- IP_VS_DBG_RL("ip_vs_bypass_xmit(): frag needed\n");
- goto tx_error;
- }
-
- /*
- * Call ip_send_check because we are not sure it is called
- * after ip_defrag. Is copy-on-write needed?
- */
- if (unlikely((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)) {
- ip_rt_put(rt);
- return NF_STOLEN;
- }
- ip_send_check(ip_hdr(skb));
-
- /* drop old route */
- dst_release(skb->dst);
- skb->dst = &rt->u.dst;
-
- /* Another hack: avoid icmp_send in ip_fragment */
- skb->local_df = 1;
-
- IP_VS_XMIT(skb, rt);
-
- LeaveFunction(10);
- return NF_STOLEN;
-
- tx_error_icmp:
- dst_link_failure(skb);
- tx_error:
- kfree_skb(skb);
- LeaveFunction(10);
- return NF_STOLEN;
-}
-
-
-/*
- * NAT transmitter (only for outside-to-inside nat forwarding)
- * Not used for related ICMP
- */
-int
-ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
-{
- struct rtable *rt; /* Route to the other host */
- int mtu;
- struct iphdr *iph = ip_hdr(skb);
-
- EnterFunction(10);
-
- /* check if it is a connection of no-client-port */
- if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT)) {
- __be16 _pt, *p;
- p = skb_header_pointer(skb, iph->ihl*4, sizeof(_pt), &_pt);
- if (p == NULL)
- goto tx_error;
- ip_vs_conn_fill_cport(cp, *p);
- IP_VS_DBG(10, "filled cport=%d\n", ntohs(*p));
- }
-
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(iph->tos))))
- goto tx_error_icmp;
-
- /* MTU checking */
- mtu = dst_mtu(&rt->u.dst);
- if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF))) {
- ip_rt_put(rt);
- icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- IP_VS_DBG_RL_PKT(0, pp, skb, 0, "ip_vs_nat_xmit(): frag needed for");
- goto tx_error;
- }
-
- /* copy-on-write the packet before mangling it */
- if (!skb_make_writable(skb, sizeof(struct iphdr)))
- goto tx_error_put;
-
- if (skb_cow(skb, rt->u.dst.dev->hard_header_len))
- goto tx_error_put;
-
- /* drop old route */
- dst_release(skb->dst);
- skb->dst = &rt->u.dst;
-
- /* mangle the packet */
- if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp))
- goto tx_error;
- ip_hdr(skb)->daddr = cp->daddr;
- ip_send_check(ip_hdr(skb));
-
- IP_VS_DBG_PKT(10, pp, skb, 0, "After DNAT");
-
- /* FIXME: when application helper enlarges the packet and the length
- is larger than the MTU of outgoing device, there will be still
- MTU problem. */
-
- /* Another hack: avoid icmp_send in ip_fragment */
- skb->local_df = 1;
-
- IP_VS_XMIT(skb, rt);
-
- LeaveFunction(10);
- return NF_STOLEN;
-
- tx_error_icmp:
- dst_link_failure(skb);
- tx_error:
- LeaveFunction(10);
- kfree_skb(skb);
- return NF_STOLEN;
- tx_error_put:
- ip_rt_put(rt);
- goto tx_error;
-}
-
-
-/*
- * IP Tunneling transmitter
- *
- * This function encapsulates the packet in a new IP packet, its
- * destination will be set to cp->daddr. Most code of this function
- * is taken from ipip.c.
- *
- * It is used in VS/TUN cluster. The load balancer selects a real
- * server from a cluster based on a scheduling algorithm,
- * encapsulates the request packet and forwards it to the selected
- * server. For example, all real servers are configured with
- * "ifconfig tunl0 <Virtual IP Address> up". When the server receives
- * the encapsulated packet, it will decapsulate the packet, processe
- * the request and return the response packets directly to the client
- * without passing the load balancer. This can greatly increase the
- * scalability of virtual server.
- *
- * Used for ANY protocol
- */
-int
-ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
-{
- struct rtable *rt; /* Route to the other host */
- struct net_device *tdev; /* Device to other host */
- struct iphdr *old_iph = ip_hdr(skb);
- u8 tos = old_iph->tos;
- __be16 df = old_iph->frag_off;
- sk_buff_data_t old_transport_header = skb->transport_header;
- struct iphdr *iph; /* Our new IP header */
- unsigned int max_headroom; /* The extra header space needed */
- int mtu;
-
- EnterFunction(10);
-
- if (skb->protocol != htons(ETH_P_IP)) {
- IP_VS_DBG_RL("ip_vs_tunnel_xmit(): protocol error, "
- "ETH_P_IP: %d, skb protocol: %d\n",
- htons(ETH_P_IP), skb->protocol);
- goto tx_error;
- }
-
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(tos))))
- goto tx_error_icmp;
-
- tdev = rt->u.dst.dev;
-
- mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr);
- if (mtu < 68) {
- ip_rt_put(rt);
- IP_VS_DBG_RL("ip_vs_tunnel_xmit(): mtu less than 68\n");
- goto tx_error;
- }
- if (skb->dst)
- skb->dst->ops->update_pmtu(skb->dst, mtu);
-
- df |= (old_iph->frag_off & htons(IP_DF));
-
- if ((old_iph->frag_off & htons(IP_DF))
- && mtu < ntohs(old_iph->tot_len)) {
- icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- ip_rt_put(rt);
- IP_VS_DBG_RL("ip_vs_tunnel_xmit(): frag needed\n");
- goto tx_error;
- }
-
- /*
- * Okay, now see if we can stuff it in the buffer as-is.
- */
- max_headroom = LL_RESERVED_SPACE(tdev) + sizeof(struct iphdr);
-
- if (skb_headroom(skb) < max_headroom
- || skb_cloned(skb) || skb_shared(skb)) {
- struct sk_buff *new_skb =
- skb_realloc_headroom(skb, max_headroom);
- if (!new_skb) {
- ip_rt_put(rt);
- kfree_skb(skb);
- IP_VS_ERR_RL("ip_vs_tunnel_xmit(): no memory\n");
- return NF_STOLEN;
- }
- kfree_skb(skb);
- skb = new_skb;
- old_iph = ip_hdr(skb);
- }
-
- skb->transport_header = old_transport_header;
-
- /* fix old IP header checksum */
- ip_send_check(old_iph);
-
- skb_push(skb, sizeof(struct iphdr));
- skb_reset_network_header(skb);
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
-
- /* drop old route */
- dst_release(skb->dst);
- skb->dst = &rt->u.dst;
-
- /*
- * Push down and install the IPIP header.
- */
- iph = ip_hdr(skb);
- iph->version = 4;
- iph->ihl = sizeof(struct iphdr)>>2;
- iph->frag_off = df;
- iph->protocol = IPPROTO_IPIP;
- iph->tos = tos;
- iph->daddr = rt->rt_dst;
- iph->saddr = rt->rt_src;
- iph->ttl = old_iph->ttl;
- ip_select_ident(iph, &rt->u.dst, NULL);
-
- /* Another hack: avoid icmp_send in ip_fragment */
- skb->local_df = 1;
-
- ip_local_out(skb);
-
- LeaveFunction(10);
-
- return NF_STOLEN;
-
- tx_error_icmp:
- dst_link_failure(skb);
- tx_error:
- kfree_skb(skb);
- LeaveFunction(10);
- return NF_STOLEN;
-}
-
-
-/*
- * Direct Routing transmitter
- * Used for ANY protocol
- */
-int
-ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
-{
- struct rtable *rt; /* Route to the other host */
- struct iphdr *iph = ip_hdr(skb);
- int mtu;
-
- EnterFunction(10);
-
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(iph->tos))))
- goto tx_error_icmp;
-
- /* MTU checking */
- mtu = dst_mtu(&rt->u.dst);
- if ((iph->frag_off & htons(IP_DF)) && skb->len > mtu) {
- icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
- ip_rt_put(rt);
- IP_VS_DBG_RL("ip_vs_dr_xmit(): frag needed\n");
- goto tx_error;
- }
-
- /*
- * Call ip_send_check because we are not sure it is called
- * after ip_defrag. Is copy-on-write needed?
- */
- if (unlikely((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)) {
- ip_rt_put(rt);
- return NF_STOLEN;
- }
- ip_send_check(ip_hdr(skb));
-
- /* drop old route */
- dst_release(skb->dst);
- skb->dst = &rt->u.dst;
-
- /* Another hack: avoid icmp_send in ip_fragment */
- skb->local_df = 1;
-
- IP_VS_XMIT(skb, rt);
-
- LeaveFunction(10);
- return NF_STOLEN;
-
- tx_error_icmp:
- dst_link_failure(skb);
- tx_error:
- kfree_skb(skb);
- LeaveFunction(10);
- return NF_STOLEN;
-}
-
-
-/*
- * ICMP packet transmitter
- * called by the ip_vs_in_icmp
- */
-int
-ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp, int offset)
-{
- struct rtable *rt; /* Route to the other host */
- int mtu;
- int rc;
-
- EnterFunction(10);
-
- /* The ICMP packet for VS/TUN, VS/DR and LOCALNODE will be
- forwarded directly here, because there is no need to
- translate address/port back */
- if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) {
- if (cp->packet_xmit)
- rc = cp->packet_xmit(skb, cp, pp);
- else
- rc = NF_ACCEPT;
- /* do not touch skb anymore */
- atomic_inc(&cp->in_pkts);
- goto out;
- }
-
- /*
- * mangle and send the packet here (only for VS/NAT)
- */
-
- if (!(rt = __ip_vs_get_out_rt(cp, RT_TOS(ip_hdr(skb)->tos))))
- goto tx_error_icmp;
-
- /* MTU checking */
- mtu = dst_mtu(&rt->u.dst);
- if ((skb->len > mtu) && (ip_hdr(skb)->frag_off & htons(IP_DF))) {
- ip_rt_put(rt);
- icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
- IP_VS_DBG_RL("ip_vs_in_icmp(): frag needed\n");
- goto tx_error;
- }
-
- /* copy-on-write the packet before mangling it */
- if (!skb_make_writable(skb, offset))
- goto tx_error_put;
-
- if (skb_cow(skb, rt->u.dst.dev->hard_header_len))
- goto tx_error_put;
-
- /* drop the old route when skb is not shared */
- dst_release(skb->dst);
- skb->dst = &rt->u.dst;
-
- ip_vs_nat_icmp(skb, pp, cp, 0);
-
- /* Another hack: avoid icmp_send in ip_fragment */
- skb->local_df = 1;
-
- IP_VS_XMIT(skb, rt);
-
- rc = NF_STOLEN;
- goto out;
-
- tx_error_icmp:
- dst_link_failure(skb);
- tx_error:
- dev_kfree_skb(skb);
- rc = NF_STOLEN;
- out:
- LeaveFunction(10);
- return rc;
- tx_error_put:
- ip_rt_put(rt);
- goto tx_error;
-}