xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tcp: avoid two atomic ops for syncookies

Browse Source 
inet_reqsk_alloc() is used to allocate a temporary request
in order to generate a SYNACK with a cookie. Then later,
syncookie validation also uses a temporary request.

These paths already took a reference on listener refcount,
we can avoid a couple of atomic operations.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2015-10-04 21:08:11 -07:00
committed by David S. Miller
parent 004a5d0140
commit a1a5344ddb
7 changed files with 19 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv6/syncookies.c
View File

@@ -170,7 +170,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
goto out;
ret = NULL;
req = inet_reqsk_alloc(&tcp6_request_sock_ops, sk);
req = inet_reqsk_alloc(&tcp6_request_sock_ops, sk, false);
if (!req)
goto out;