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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-11-28 12:04:18 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-29 00:27:11 -0500 |
| commit | 08e29af3a9096ffdff477e537daea67faefd3952 (patch) | |
| tree | 11c8ab801659f1c77f9949cc20f30f232e95fe3a | |
| parent | b90e5794c5bdef91d26c623e992257947c506e35 (diff) | |
| download | linux-stable-08e29af3a9096ffdff477e537daea67faefd3952.tar.gz linux-stable-08e29af3a9096ffdff477e537daea67faefd3952.tar.bz2 linux-stable-08e29af3a9096ffdff477e537daea67faefd3952.zip | |
net: optimize socket timestamping
We can test/set multiple bits from sk_flags at once, to shorten a bit
socket setup/dismantle phase.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/sock.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 16069139797c..9777da86aeac 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -276,14 +276,14 @@ static void sock_warn_obsolete_bsdism(const char *name) } } -static void sock_disable_timestamp(struct sock *sk, int flag) +#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)) + +static void sock_disable_timestamp(struct sock *sk, unsigned long flags) { - if (sock_flag(sk, flag)) { - sock_reset_flag(sk, flag); - if (!sock_flag(sk, SOCK_TIMESTAMP) && - !sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE)) { + if (sk->sk_flags & flags) { + sk->sk_flags &= ~flags; + if (!(sk->sk_flags & SK_FLAGS_TIMESTAMP)) net_disable_timestamp(); - } } } @@ -689,7 +689,7 @@ set_rcvbuf: SOCK_TIMESTAMPING_RX_SOFTWARE); else sock_disable_timestamp(sk, - SOCK_TIMESTAMPING_RX_SOFTWARE); + (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)); sock_valbool_flag(sk, SOCK_TIMESTAMPING_SOFTWARE, val & SOF_TIMESTAMPING_SOFTWARE); sock_valbool_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE, @@ -1187,8 +1187,7 @@ static void __sk_free(struct sock *sk) RCU_INIT_POINTER(sk->sk_filter, NULL); } - sock_disable_timestamp(sk, SOCK_TIMESTAMP); - sock_disable_timestamp(sk, SOCK_TIMESTAMPING_RX_SOFTWARE); + sock_disable_timestamp(sk, SK_FLAGS_TIMESTAMP); if (atomic_read(&sk->sk_omem_alloc)) printk(KERN_DEBUG "%s: optmem leakage (%d bytes) detected.\n", @@ -1326,8 +1325,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority) if (newsk->sk_prot->sockets_allocated) percpu_counter_inc(newsk->sk_prot->sockets_allocated); - if (sock_flag(newsk, SOCK_TIMESTAMP) || - sock_flag(newsk, SOCK_TIMESTAMPING_RX_SOFTWARE)) + if (newsk->sk_flags & SK_FLAGS_TIMESTAMP) net_enable_timestamp(); } out: @@ -2165,16 +2163,15 @@ EXPORT_SYMBOL(sock_get_timestampns); void sock_enable_timestamp(struct sock *sk, int flag) { if (!sock_flag(sk, flag)) { + unsigned long previous_flags = sk->sk_flags; + sock_set_flag(sk, flag); /* * we just set one of the two flags which require net * time stamping, but time stamping might have been on * already because of the other one */ - if (!sock_flag(sk, - flag == SOCK_TIMESTAMP ? - SOCK_TIMESTAMPING_RX_SOFTWARE : - SOCK_TIMESTAMP)) + if (!(previous_flags & SK_FLAGS_TIMESTAMP)) net_enable_timestamp(); } } |