diff options
| author | Eric Dumazet <edumazet@google.com> | 2015-07-09 00:28:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-10 01:12:20 +0300 |
| commit | fc01538f9fb75572c969ca9988176ffc2a8741d6 (patch) | |
| tree | 51125f77aaa93b73953f7d3189c1e2a13a904490 /net/ipv6/inet6_hashtables.c | |
| parent | 3fd2f1b9d91284afb957ab9899a83279d0e09f29 (diff) | |
| download | linux-fc01538f9fb75572c969ca9988176ffc2a8741d6.tar.xz | |
inet: simplify timewait refcounting
timewait sockets have a complex refcounting logic.
Once we realize it should be similar to established and
syn_recv sockets, we can use sk_nulls_del_node_init_rcu()
and remove inet_twsk_unhash()
In particular, deferred inet_twsk_put() added in commit
13475a30b66cd ("tcp: connect() race with timewait reuse")
looks unecessary : When removing a timewait socket from
ehash or bhash, caller must own a reference on the socket
anyway.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/inet6_hashtables.c')
| -rw-r--r-- | net/ipv6/inet6_hashtables.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c index b4fd96de97e6..a237398aa2b4 100644 --- a/net/ipv6/inet6_hashtables.c +++ b/net/ipv6/inet6_hashtables.c @@ -207,7 +207,6 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row, struct sock *sk2; const struct hlist_nulls_node *node; struct inet_timewait_sock *tw = NULL; - int twrefcnt = 0; spin_lock(lock); @@ -234,12 +233,10 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row, WARN_ON(!sk_unhashed(sk)); __sk_nulls_add_node_rcu(sk, &head->chain); if (tw) { - twrefcnt = inet_twsk_unhash(tw); + sk_nulls_del_node_init_rcu((struct sock *)tw); NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED); } spin_unlock(lock); - if (twrefcnt) - inet_twsk_put(tw); sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); if (twp) { @@ -247,7 +244,6 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row, } else if (tw) { /* Silly. Should hash-dance instead... */ inet_twsk_deschedule(tw); - inet_twsk_put(tw); } return 0; |