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| author |   Menglong Dong <dong.menglong@zte.com.cn> | 2020-11-05 20:49:14 -0500 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2020-11-09 15:34:44 -0800 |
| commit | a3ce2b109a59ee9670706ae8126dcc04cfe261cd (patch) | |
| tree | f048c762ceb333a0d435005cc856704802b58f52 /net/ipv6/udp.c | |
| parent | stmmac: intel: change all EHL/TGL to auto detect phy addr (diff) | |
| download | linux-dev-a3ce2b109a59ee9670706ae8126dcc04cfe261cd.tar.xz linux-dev-a3ce2b109a59ee9670706ae8126dcc04cfe261cd.zip | |
net: udp: introduce UDP_MIB_MEMERRORS for udp_mem
When udp_memory_allocated is at the limit, __udp_enqueue_schedule_skb
will return a -ENOBUFS, and skb will be dropped in __udp_queue_rcv_skb
without any counters being done. It's hard to find out what happened
once this happen.
So we introduce a UDP_MIB_MEMERRORS to do this job. Well, this change
looks friendly to the existing users, such as netstat:
$ netstat -u -s
Udp:
0 packets received
639 packets to unknown port received.
158689 packet receive errors
180022 packets sent
RcvbufErrors: 20930
MemErrors: 137759
UdpLite:
IpExt:
InOctets: 257426235
OutOctets: 257460598
InNoECTPkts: 181177
v2:
- Fix some alignment problems
Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
Link: https://lore.kernel.org/r/1604627354-43207-1-git-send-email-dong.menglong@zte.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index cde9b8874d4b..559611bef0e6 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -637,6 +637,9 @@ static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) if (rc == -ENOMEM) UDP6_INC_STATS(sock_net(sk), UDP_MIB_RCVBUFERRORS, is_udplite); + else + UDP6_INC_STATS(sock_net(sk), + UDP_MIB_MEMERRORS, is_udplite); UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); kfree_skb(skb); return -1; |