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authorEric Dumazet <dada1@cosmosbay.com>2009-04-17 22:03:10 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-20 02:25:26 -0700
commit7eebb0b28f755e297d355a205bb04945b256db6b (patch)
treeae09d5928a764f5cb58eb217ec0d910e5d332474 /net/ipv4/syncookies.c
parenteb62efd287fe6e12d18083287e38e4a811c28256 (diff)
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loopback: packet drops accounting
We can in some situations drop packets in netif_rx() loopback driver does not report these (unlikely) drops to its stats, and incorrectly change packets/bytes counts. After this patch applied, "ifconfig lo" can reports these drops as in : # ifconfig lo lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:692562900 errors:3228 dropped:3228 overruns:0 frame:0 TX packets:692562900 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2865674174 (2.6 GiB) TX bytes:2865674174 (2.6 GiB) I initialy chose to reflect those errors only in tx_dropped/tx_errors, but David convinced me that it was really RX errors, as loopback_xmit() really starts a RX process. (calling eth_type_trans() for example, that itself pulls the ethernet header) These errors are accounted in rx_dropped/rx_errors. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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