Satoru Moriya 296f7ea75b udp: add tracepoints for queueing skb to rcvbuf
This patch adds a tracepoint to __udp_queue_rcv_skb to get the
return value of ip_queue_rcv_skb. It indicates why kernel drops
a packet at this point.

ip_queue_rcv_skb returns following values in the packet drop case:

rcvbuf is full                 : -ENOMEM
sk_filter returns error        : -EINVAL, -EACCESS, -ENOMEM, etc.
__sk_mem_schedule returns error: -ENOBUF

Signed-off-by: Satoru Moriya <satoru.moriya@hds.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:10 -07:00
..
2011-05-24 13:29:50 -04:00
2010-07-12 12:57:55 -07:00
2011-03-31 11:26:23 -03:00
2010-11-28 18:24:14 -08:00
2010-07-12 12:57:55 -07:00
2011-05-22 21:01:22 -04:00
2011-03-31 11:26:23 -03:00