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authorNeil Horman <nhorman@tuxdriver.com>2008-07-16 20:50:49 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-16 20:50:49 -0700
commit9a6d276e85aa3d8f308fc5e8de6892daeb60ae5f (patch)
treef61e1ad988a037745794fb23004d5bf2f247800f /include
parented88098e25d77bef3b2ad8c9d8e2ebf454d9ccbf (diff)
core: add stat to track unresolved discards in neighbor cache
in __neigh_event_send, if we have a neighbour entry which is in NUD_INCOMPLETE state, we enqueue any outbound frames to that neighbour to the neighbours arp_queue, which is default capped to a length of 3 skbs. If that queue exceeds its set length, it will drop an skb on the queue to enqueue the newly arrived skb. This results in a drop for which we have no statistics incremented. This patch adds an unresolved_discards stat to /proc/net/stat/ndisc_cache to track these lost frames. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/neighbour.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index dc420fecafb..aa4b708654a 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -75,7 +75,7 @@ struct neigh_statistics
unsigned long destroys; /* number of destroyed neighs */
unsigned long hash_grows; /* number of hash resizes */
- unsigned long res_failed; /* nomber of failed resolutions */
+ unsigned long res_failed; /* number of failed resolutions */
unsigned long lookups; /* number of lookups */
unsigned long hits; /* number of hits (among lookups) */
@@ -85,6 +85,8 @@ struct neigh_statistics
unsigned long periodic_gc_runs; /* number of periodic GC runs */
unsigned long forced_gc_runs; /* number of forced GC runs */
+
+ unsigned long unres_discards; /* number of unresolved drops */
};
#define NEIGH_CACHE_STAT_INC(tbl, field) \