1 files changed, 0 insertions, 559 deletions

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;
-}