From a9b6391814d5d6b8668fca2dace86949b7244e2e Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Tue, 12 May 2015 11:56:50 -0400 Subject: packet: rollover statistics Rollover indicates exceptional conditions. Export a counter to inform socket owners of this state. If no socket with sufficient room is found, rollover fails. Also count these events. Finally, also count when flows are rolled over early thanks to huge flow detection, to validate its correctness. Tested: Read counters in bench_rollover on all other tests in the patchset Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- include/uapi/linux/if_packet.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/if_packet.h b/include/uapi/linux/if_packet.h index 053bd10..d3d715f8c 100644 --- a/include/uapi/linux/if_packet.h +++ b/include/uapi/linux/if_packet.h @@ -54,6 +54,7 @@ struct sockaddr_ll { #define PACKET_FANOUT 18 #define PACKET_TX_HAS_OFF 19 #define PACKET_QDISC_BYPASS 20 +#define PACKET_ROLLOVER_STATS 21 #define PACKET_FANOUT_HASH 0 #define PACKET_FANOUT_LB 1 @@ -75,6 +76,12 @@ struct tpacket_stats_v3 { unsigned int tp_freeze_q_cnt; }; +struct tpacket_rollover_stats { + __aligned_u64 tp_all; + __aligned_u64 tp_huge; + __aligned_u64 tp_failed; +}; + union tpacket_stats_u { struct tpacket_stats stats1; struct tpacket_stats_v3 stats3; -- cgit v1.1