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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-06-17 21:04:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-06-17 21:04:56 -0700 |
| commit | cb61cb9b8b5ef6c2697d84e5015e314626eb2fba (patch) | |
| tree | 430dd8d5b56d0a9911750ffcbd97563ce68d1b27 /net/ipv6/udp.c | |
| parent | fe2c802ab62aa63d276deafa905875f3455f2621 (diff) | |
| download | lwn-cb61cb9b8b5ef6c2697d84e5015e314626eb2fba.tar.gz lwn-cb61cb9b8b5ef6c2697d84e5015e314626eb2fba.zip | |
udp: sk_drops handling
In commits 33c732c36169d7022ad7d6eb474b0c9be43a2dc1 ([IPV4]: Add raw
drops counter) and a92aa318b4b369091fd80433c80e62838db8bc1c ([IPV6]:
Add raw drops counter), Wang Chen added raw drops counter for
/proc/net/raw & /proc/net/raw6
This patch adds this capability to UDP sockets too (/proc/net/udp &
/proc/net/udp6).
This means that 'RcvbufErrors' errors found in /proc/net/snmp can be also
be examined for each udp socket.
# grep Udp: /proc/net/snmp
Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors
Udp: 23971006 75 899420 16390693 146348 0
# cat /proc/net/udp
sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt ---
uid timeout inode ref pointer drops
75: 00000000:02CB 00000000:0000 07 00000000:00000000 00:00000000 00000000 ---
0 0 2358 2 ffff81082a538c80 0
111: 00000000:006F 00000000:0000 07 00000000:00000000 00:00000000 00000000 ---
0 0 2286 2 ffff81042dd35c80 146348
In this example, only port 111 (0x006F) was flooded by messages that
user program could not read fast enough. 146348 messages were lost.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 432edaa882f6..f91e1df0d25e 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -297,8 +297,10 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { /* Note that an ENOMEM error is charged twice */ - if (rc == -ENOMEM) + if (rc == -ENOMEM) { UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite); + atomic_inc(&sk->sk_drops); + } goto drop; } @@ -955,7 +957,7 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket srcp = ntohs(inet->sport); seq_printf(seq, "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " - "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", + "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", bucket, src->s6_addr32[0], src->s6_addr32[1], src->s6_addr32[2], src->s6_addr32[3], srcp, @@ -967,7 +969,8 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp), - atomic_read(&sp->sk_refcnt), sp); + atomic_read(&sp->sk_refcnt), sp, + atomic_read(&sp->sk_drops)); } int udp6_seq_show(struct seq_file *seq, void *v) @@ -978,7 +981,7 @@ int udp6_seq_show(struct seq_file *seq, void *v) "local_address " "remote_address " "st tx_queue rx_queue tr tm->when retrnsmt" - " uid timeout inode\n"); + " uid timeout inode ref pointer drops\n"); else udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); return 0; |