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Message-Id: <1436390910-13117-4-git-send-email-edumazet@google.com>
Date: Wed, 8 Jul 2015 14:28:30 -0700
From: Eric Dumazet <edumazet@...gle.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Eric Dumazet <edumazet@...gle.com>,
Eric Dumazet <edumazet@...il.com>
Subject: [PATCH net-next 3/3] inet: inet_twsk_deschedule factorization
inet_twsk_deschedule() calls are followed by inet_twsk_put().
Only particular case is in inet_twsk_purge() but there is no point
to defer the inet_twsk_put() after re-enabling BH.
Lets rename inet_twsk_deschedule() to inet_twsk_deschedule_put()
and move the inet_twsk_put() inside.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
include/net/inet_timewait_sock.h | 2 +-
net/ipv4/inet_hashtables.c | 9 +++------
net/ipv4/inet_timewait_sock.c | 13 ++++++++-----
net/ipv4/tcp_ipv4.c | 3 +--
net/ipv4/tcp_minisocks.c | 6 ++----
net/ipv6/inet6_hashtables.c | 3 +--
net/ipv6/tcp_ipv6.c | 3 +--
net/netfilter/xt_TPROXY.c | 6 ++----
8 files changed, 19 insertions(+), 26 deletions(-)
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 96f52a4711c8..879d6e5a973b 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -111,7 +111,7 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
struct inet_hashinfo *hashinfo);
void inet_twsk_schedule(struct inet_timewait_sock *tw, const int timeo);
-void inet_twsk_deschedule(struct inet_timewait_sock *tw);
+void inet_twsk_deschedule_put(struct inet_timewait_sock *tw);
void inet_twsk_purge(struct inet_hashinfo *hashinfo,
struct inet_timewait_death_row *twdr, int family);
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index e58840330da7..f8b3701a6c3c 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -380,8 +380,7 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
*twp = tw;
} else if (tw) {
/* Silly. Should hash-dance instead... */
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
+ inet_twsk_deschedule_put(tw);
}
return 0;
@@ -558,10 +557,8 @@ ok:
inet_twsk_bind_unhash(tw, hinfo);
spin_unlock(&head->lock);
- if (tw) {
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
- }
+ if (tw)
+ inet_twsk_deschedule_put(tw);
ret = 0;
goto out;
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 92cd4d50404e..ae22cc24fbe8 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -205,13 +205,17 @@ EXPORT_SYMBOL_GPL(inet_twsk_alloc);
* tcp_input.c to verify this.
*/
-/* This is for handling early-kills of TIME_WAIT sockets. */
-void inet_twsk_deschedule(struct inet_timewait_sock *tw)
+/* This is for handling early-kills of TIME_WAIT sockets.
+ * Warning : consume reference.
+ * Caller should not access tw anymore.
+ */
+void inet_twsk_deschedule_put(struct inet_timewait_sock *tw)
{
if (del_timer_sync(&tw->tw_timer))
inet_twsk_kill(tw);
+ inet_twsk_put(tw);
}
-EXPORT_SYMBOL(inet_twsk_deschedule);
+EXPORT_SYMBOL(inet_twsk_deschedule_put);
void inet_twsk_schedule(struct inet_timewait_sock *tw, const int timeo)
{
@@ -281,9 +285,8 @@ restart:
rcu_read_unlock();
local_bh_disable();
- inet_twsk_deschedule(tw);
+ inet_twsk_deschedule_put(tw);
local_bh_enable();
- inet_twsk_put(tw);
goto restart_rcu;
}
/* If the nulls value we got at the end of this lookup is
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d7d4c2b79cf2..486ba96ae91a 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1683,8 +1683,7 @@ do_time_wait:
iph->daddr, th->dest,
inet_iif(skb));
if (sk2) {
- inet_twsk_deschedule(inet_twsk(sk));
- inet_twsk_put(inet_twsk(sk));
+ inet_twsk_deschedule_put(inet_twsk(sk));
sk = sk2;
goto process;
}
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 4bc00cb79e60..6d8795b066ac 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -147,8 +147,7 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
if (!th->fin ||
TCP_SKB_CB(skb)->end_seq != tcptw->tw_rcv_nxt + 1) {
kill_with_rst:
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
+ inet_twsk_deschedule_put(tw);
return TCP_TW_RST;
}
@@ -198,8 +197,7 @@ kill_with_rst:
*/
if (sysctl_tcp_rfc1337 == 0) {
kill:
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
+ inet_twsk_deschedule_put(tw);
return TCP_TW_SUCCESS;
}
}
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index a237398aa2b4..6ac8dad0138a 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -243,8 +243,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
*twp = tw;
} else if (tw) {
/* Silly. Should hash-dance instead... */
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
+ inet_twsk_deschedule_put(tw);
}
return 0;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 6748c4277aff..d540846a1a79 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1481,8 +1481,7 @@ do_time_wait:
ntohs(th->dest), tcp_v6_iif(skb));
if (sk2) {
struct inet_timewait_sock *tw = inet_twsk(sk);
- inet_twsk_deschedule(tw);
- inet_twsk_put(tw);
+ inet_twsk_deschedule_put(tw);
sk = sk2;
tcp_v6_restore_cb(skb);
goto process;
diff --git a/net/netfilter/xt_TPROXY.c b/net/netfilter/xt_TPROXY.c
index cca96cec1b68..d0c96c5ae29a 100644
--- a/net/netfilter/xt_TPROXY.c
+++ b/net/netfilter/xt_TPROXY.c
@@ -272,8 +272,7 @@ tproxy_handle_time_wait4(struct sk_buff *skb, __be32 laddr, __be16 lport,
hp->source, lport ? lport : hp->dest,
skb->dev, NFT_LOOKUP_LISTENER);
if (sk2) {
- inet_twsk_deschedule(inet_twsk(sk));
- inet_twsk_put(inet_twsk(sk));
+ inet_twsk_deschedule_put(inet_twsk(sk));
sk = sk2;
}
}
@@ -437,8 +436,7 @@ tproxy_handle_time_wait6(struct sk_buff *skb, int tproto, int thoff,
tgi->lport ? tgi->lport : hp->dest,
skb->dev, NFT_LOOKUP_LISTENER);
if (sk2) {
- inet_twsk_deschedule(inet_twsk(sk));
- inet_twsk_put(inet_twsk(sk));
+ inet_twsk_deschedule_put(inet_twsk(sk));
sk = sk2;
}
}
--
2.4.3.573.g4eafbef
--
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