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authorPavel Emelyanov <xemul@openvz.org>2008-01-31 05:07:57 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-31 19:28:21 -0800
commitfa4d3c6210380c55cf7f295d28fd981fbcbb828c (patch)
tree0161c8574349adb4eb93b2996dacf70b472696ac /net/ipv4/udp.c
parentd86e0dac2ce412715181f792aa0749fe3effff11 (diff)
[NETNS]: Udp sockets per-net lookup.
Add the net parameter to udp_get_port family of calls and udp_lookup one and use it to filter sockets. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
-rw-r--r--net/ipv4/udp.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 2fb8d731026..7ea1b67b6de 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -130,14 +130,14 @@ EXPORT_SYMBOL(sysctl_udp_wmem_min);
atomic_t udp_memory_allocated;
EXPORT_SYMBOL(udp_memory_allocated);
-static inline int __udp_lib_lport_inuse(__u16 num,
+static inline int __udp_lib_lport_inuse(struct net *net, __u16 num,
const struct hlist_head udptable[])
{
struct sock *sk;
struct hlist_node *node;
sk_for_each(sk, node, &udptable[num & (UDP_HTABLE_SIZE - 1)])
- if (sk->sk_hash == num)
+ if (sk->sk_net == net && sk->sk_hash == num)
return 1;
return 0;
}
@@ -159,6 +159,7 @@ int __udp_lib_get_port(struct sock *sk, unsigned short snum,
struct hlist_head *head;
struct sock *sk2;
int error = 1;
+ struct net *net = sk->sk_net;
write_lock_bh(&udp_hash_lock);
@@ -198,7 +199,7 @@ int __udp_lib_get_port(struct sock *sk, unsigned short snum,
/* 2nd pass: find hole in shortest hash chain */
rover = best;
for (i = 0; i < (1 << 16) / UDP_HTABLE_SIZE; i++) {
- if (! __udp_lib_lport_inuse(rover, udptable))
+ if (! __udp_lib_lport_inuse(net, rover, udptable))
goto gotit;
rover += UDP_HTABLE_SIZE;
if (rover > high)
@@ -218,6 +219,7 @@ gotit:
sk_for_each(sk2, node, head)
if (sk2->sk_hash == snum &&
sk2 != sk &&
+ sk2->sk_net == net &&
(!sk2->sk_reuse || !sk->sk_reuse) &&
(!sk2->sk_bound_dev_if || !sk->sk_bound_dev_if
|| sk2->sk_bound_dev_if == sk->sk_bound_dev_if) &&
@@ -261,9 +263,9 @@ static inline int udp_v4_get_port(struct sock *sk, unsigned short snum)
/* UDP is nearly always wildcards out the wazoo, it makes no sense to try
* harder than this. -DaveM
*/
-static struct sock *__udp4_lib_lookup(__be32 saddr, __be16 sport,
- __be32 daddr, __be16 dport,
- int dif, struct hlist_head udptable[])
+static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
+ __be16 sport, __be32 daddr, __be16 dport,
+ int dif, struct hlist_head udptable[])
{
struct sock *sk, *result = NULL;
struct hlist_node *node;
@@ -274,7 +276,8 @@ static struct sock *__udp4_lib_lookup(__be32 saddr, __be16 sport,
sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
struct inet_sock *inet = inet_sk(sk);
- if (sk->sk_hash == hnum && !ipv6_only_sock(sk)) {
+ if (sk->sk_net == net && sk->sk_hash == hnum &&
+ !ipv6_only_sock(sk)) {
int score = (sk->sk_family == PF_INET ? 1 : 0);
if (inet->rcv_saddr) {
if (inet->rcv_saddr != daddr)
@@ -361,8 +364,8 @@ void __udp4_lib_err(struct sk_buff *skb, u32 info, struct hlist_head udptable[])
int harderr;
int err;
- sk = __udp4_lib_lookup(iph->daddr, uh->dest, iph->saddr, uh->source,
- skb->dev->ifindex, udptable );
+ sk = __udp4_lib_lookup(skb->dev->nd_net, iph->daddr, uh->dest,
+ iph->saddr, uh->source, skb->dev->ifindex, udptable);
if (sk == NULL) {
ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
return; /* No socket for error */
@@ -1185,8 +1188,8 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
if (rt->rt_flags & (RTCF_BROADCAST|RTCF_MULTICAST))
return __udp4_lib_mcast_deliver(skb, uh, saddr, daddr, udptable);
- sk = __udp4_lib_lookup(saddr, uh->source, daddr, uh->dest,
- inet_iif(skb), udptable);
+ sk = __udp4_lib_lookup(skb->dev->nd_net, saddr, uh->source, daddr,
+ uh->dest, inet_iif(skb), udptable);
if (sk != NULL) {
int ret = 0;