ndo_xsk_wakeup() can return -ENETDOWN and there's no particular reason
to bail the whole application out on that case. Let's check in kick_tx()
whether errno was set to mentioned value and basically allow application
to further process frames.
Fixes: 248c7f9c0e21 ("samples/bpf: convert xdpsock to use libbpf for AF_XDP access")
Reported-by: Cameron Elliott <cameron@xxxxxxxxxxxxxxxxxx>
Acked-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
---
samples/bpf/xdpsock_user.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index bab7a850e..c91e91362 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -788,7 +788,8 @@ static void kick_tx(struct xsk_socket_info *xsk)
int ret;
ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
- if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY)
+ if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN ||
+ errno == EBUSY || errno == ENETDOWN)
return;
exit_with_error(errno);
}
--
2.20.1
