[PATCH 9/12 net-2.6.26] [NETNS]: icmp(v6)_sk should not pin a namespace.
From: Denis V. Lunev <hidden>
Date: 2008-02-29 13:40:41
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
So, change icmp(v6)_sk creation/disposal to the scheme used in the netlink for rtnl, i.e. create a socket in the context of the init_net and assign the namespace without getting a referrence later. Also use sk_release_kernel instead of sock_release to properly destroy such sockets. Signed-off-by: Denis V. Lunev <redacted> Acked-by: Daniel Lezcano <redacted> --- net/ipv4/icmp.c | 12 ++++-------- net/ipv6/icmp.c | 11 +++++------ 2 files changed, 9 insertions(+), 14 deletions(-)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 7c62a0d..97d97ad 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c@@ -1146,14 +1146,8 @@ static void __exit icmp_exit(void) { int i; - for_each_possible_cpu(i) { - struct sock *sk; - - sk = __icmp_sk[i]; - if (sk == NULL) - continue; - sock_release(sk->sk_socket); - } + for_each_possible_cpu(i) + sk_release_kernel(__icmp_sk[i]); kfree(__icmp_sk); __icmp_sk = NULL; }
@@ -1176,6 +1170,8 @@ int __init icmp_init(void) goto fail; __icmp_sk[i] = sk = sock->sk; + sk_change_net(sk, &init_net); + sk->sk_allocation = GFP_ATOMIC; /* Enough space for 2 64K ICMP packets, including
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 3368f32..7341d79 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c@@ -802,6 +802,8 @@ int __init icmpv6_init(void) } __icmpv6_sk[i] = sk = sock->sk; + sk_change_net(sk, &init_net); + sk->sk_allocation = GFP_ATOMIC; /* * Split off their lock-class, because sk->sk_dst_lock
@@ -831,11 +833,8 @@ int __init icmpv6_init(void) return 0; fail: - for (j = 0; j < i; j++) { - if (!cpu_possible(j)) - continue; - sock_release(__icmpv6_sk[j]->sk_socket); - } + for (j = 0; j < i; j++) + sk_release_kernel(__icmpv6_sk[j]); return err; }
@@ -845,7 +844,7 @@ void icmpv6_cleanup(void) int i; for_each_possible_cpu(i) { - sock_release(__icmpv6_sk[i]->sk_socket); + sk_release_kernel(__icmpv6_sk[i]); } inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6); }
--
1.5.3.rc5