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authorHaishuang Yan <yanhaishuang@cmss.chinamobile.com>2017-09-27 11:35:42 +0800
committerDavid S. Miller <davem@davemloft.net>2017-10-01 17:55:54 -0700
commit437138485656c41e32b8c63c0987cfa0348be0e6 (patch)
tree942ae784a68f7d351f62fd3ac48c1330d629ce31 /net/ipv4/tcp.c
parentdd000598a39b6937fcefdf143720ec9fb5250e72 (diff)
downloadlinux-437138485656c41e32b8c63c0987cfa0348be0e6.tar.bz2
ipv4: Namespaceify tcp_fastopen_key knob
Different namespace application might require different tcp_fastopen_key independently of the host. David Miller pointed out there is a leak without releasing the context of tcp_fastopen_key during netns teardown. So add the release action in exit_batch path. Tested: 1. Container namespace: # cat /proc/sys/net/ipv4/tcp_fastopen_key: 2817fff2-f803cf97-eadfd1f3-78c0992b cookie key in tcp syn packets: Fast Open Cookie Kind: TCP Fast Open Cookie (34) Length: 10 Fast Open Cookie: 1e5dd82a8c492ca9 2. Host: # cat /proc/sys/net/ipv4/tcp_fastopen_key: 107d7c5f-68eb2ac7-02fb06e6-ed341702 cookie key in tcp syn packets: Fast Open Cookie Kind: TCP Fast Open Cookie (34) Length: 10 Fast Open Cookie: e213c02bf0afbc8a Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 4e395452d69f..23225c98d287 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2749,7 +2749,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
case TCP_FASTOPEN:
if (val >= 0 && ((1 << sk->sk_state) & (TCPF_CLOSE |
TCPF_LISTEN))) {
- tcp_fastopen_init_key_once();
+ tcp_fastopen_init_key_once(net);
fastopen_queue_tune(sk, val);
} else {