From 8ed47e140867a6e7d56170f325c8d4fdee6d6b66 Mon Sep 17 00:00:00 2001 From: Maciej Fijalkowski Date: Wed, 5 Feb 2020 05:58:34 +0100 Subject: samples: bpf: Allow for -ENETDOWN in xdpsock MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Maciej Fijalkowski Signed-off-by: Daniel Borkmann Acked-by: Björn Töpel Link: https://lore.kernel.org/bpf/20200205045834.56795-4-maciej.fijalkowski@intel.com --- samples/bpf/xdpsock_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'samples') diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index bab7a850e864..c91e91362a0c 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); } -- cgit v1.2.3-59-g8ed1b