xsk: Add new statistics
It can be useful for the user to know the reason behind a dropped packet.
Introduce new counters which track drops on the receive path caused by:
1. rx ring being full
2. fill ring being empty
Also, on the tx path introduce a counter which tracks the number of times
we attempt pull from the tx ring when it is empty.
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200708072835.4427-2-ciara.loftus@intel.com
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index 96bfc5f..c9d87cc 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -69,7 +69,11 @@ struct xdp_sock {
spinlock_t tx_completion_lock;
/* Protects generic receive. */
spinlock_t rx_lock;
+
+ /* Statistics */
u64 rx_dropped;
+ u64 rx_queue_full;
+
struct list_head map_list;
/* Protects map_list */
spinlock_t map_list_lock;
