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tcp: constify tcp_syn_flood_action() socket argument

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tcp_syn_flood_action() will soon be called with unlocked socket.
In order to avoid SYN flood warning being emitted multiple times,
use xchg().
Extend max_qlen_log and synflood_warned fields in struct listen_sock
to u32

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-09-29 07:42:51 -07:00 • committed by David S. Miller
commit 2985aaac01
2 changed files with 7 additions and 7 deletions
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5
include/net/request_sock.h
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@ -129,9 +129,8 @@ struct listen_sock {
atomic_t qlen_dec; /* qlen = qlen_inc - qlen_dec */
atomic_t young_dec;
u8 max_qlen_log ____cacheline_aligned_in_smp;
u8 synflood_warned;
/* 2 bytes hole, try to use */
u32 max_qlen_log ____cacheline_aligned_in_smp;
u32 synflood_warned;
u32 hash_rnd;
u32 nr_table_entries;
struct request_sock *syn_table[0];