diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2018-06-04 13:57:12 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-06-04 17:21:02 +0200 |
| commit | a509a95536a86ef84deb16c656d741437791b414 (patch) | |
| tree | 7003dd6cf67754e4320e4983604ad29c5ae2ee47 /net | |
| parent | 4e64c835254095f55044d393e628dd3e92fca304 (diff) | |
| download | linux-0-day-a509a95536a86ef84deb16c656d741437791b414.tar.gz linux-0-day-a509a95536a86ef84deb16c656d741437791b414.tar.xz | |
xsk: proper Rx drop statistics update
Previously, rx_dropped could be updated incorrectly, e.g. if the XDP
program redirected the frame to a socket bound to a different queue
than where the XDP program was executing.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/xdp/xsk.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 43554eb56fe61..966307ce4b8e6 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -48,8 +48,10 @@ static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp) if (xs->dev != xdp->rxq->dev || xs->queue_id != xdp->rxq->queue_index) return -EINVAL; - if (!xskq_peek_id(xs->umem->fq, &id)) + if (!xskq_peek_id(xs->umem->fq, &id)) { + xs->rx_dropped++; return -ENOSPC; + } buffer = xdp_umem_get_data_with_headroom(xs->umem, id); memcpy(buffer, xdp->data, len); @@ -57,6 +59,8 @@ static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp) xs->umem->frame_headroom); if (!err) xskq_discard_id(xs->umem->fq); + else + xs->rx_dropped++; return err; } @@ -68,8 +72,6 @@ int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp) err = __xsk_rcv(xs, xdp); if (likely(!err)) xdp_return_buff(xdp); - else - xs->rx_dropped++; return err; } @@ -87,8 +89,6 @@ int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp) err = __xsk_rcv(xs, xdp); if (!err) xsk_flush(xs); - else - xs->rx_dropped++; return err; } |