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net: tcp: Increase TCP_MIB_OUTRSTS even though fail to alloc skb 

Because TCP_MIB_OUTRSTS is an important count, so always increase it
whatever send it successfully or not.

Now move the increment of TCP_MIB_OUTRSTS to the top of
tcp_send_active_reset to make sure it is increased always even though
fail to alloc skb.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gao Feng 2017-04-06 23:05:49 +08:00 committed by David S. Miller
parent 3aecfbb19c
commit 7cc2b043bc
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/tcp_output.c
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@ -2999,6 +2999,8 @@ void tcp_send_active_reset(struct sock *sk, gfp_t priority)
{ {
struct sk_buff *skb; struct sk_buff *skb;
TCP_INC_STATS(sock_net(sk), TCP_MIB_OUTRSTS);
/* NOTE: No TCP options attached and we never retransmit this. */ /* NOTE: No TCP options attached and we never retransmit this. */
skb = alloc_skb(MAX_TCP_HEADER, priority); skb = alloc_skb(MAX_TCP_HEADER, priority);
if (!skb) { if (!skb) {
@ -3014,8 +3016,6 @@ void tcp_send_active_reset(struct sock *sk, gfp_t priority)
/* Send it off. */ /* Send it off. */
if (tcp_transmit_skb(sk, skb, 0, priority)) if (tcp_transmit_skb(sk, skb, 0, priority))
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTFAILED); NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTFAILED);
TCP_INC_STATS(sock_net(sk), TCP_MIB_OUTRSTS);
} }
/* Send a crossed SYN-ACK during socket establishment. /* Send a crossed SYN-ACK during socket establishment.