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xsk: statistics support

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In this commit, a new getsockopt is added: XDP_STATISTICS. This is
used to obtain stats from the sockets.

v2: getsockopt now returns size of stats structure.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Magnus Karlsson
2018-05-02 13:01:35 +02:00
committed by Alexei Starovoitov
parent 35fcde7f8d
commit af75d9e02d
3 changed files with 56 additions and 1 deletions
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5
net/xdp/xsk_queue.h
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@@ -36,6 +36,11 @@ struct xsk_queue {
/* Common functions operating for both RXTX and umem queues */
static inline u64 xskq_nb_invalid_descs(struct xsk_queue *q)
{
return q ? q->invalid_descs : 0;
}
static inline u32 xskq_nb_avail(struct xsk_queue *q, u32 dcnt)
{
u32 entries = q->prod_tail - q->cons_tail;