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xsk: always return ENOBUFS from sendmsg if there is no TX queue

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This patch makes sure ENOBUFS is always returned from sendmsg if there
is no TX queue configured. This was not the case for zero-copy
mode. With this patch this error reporting is consistent between copy
mode and zero-copy mode.

Fixes: ac98d8aab6 ("xsk: wire upp Tx zero-copy functions")
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Magnus Karlsson 2018-07-11 10:12:51 +02:00 committed by Daniel Borkmann
parent 9684f5e7c8
commit 6efb4436f7
1 changed files with 2 additions and 3 deletions
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5
net/xdp/xsk.c
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@ -218,9 +218,6 @@ static int xsk_generic_xmit(struct sock *sk, struct msghdr *m,
struct sk_buff *skb;
int err = 0;
if (unlikely(!xs->tx))
return -ENOBUFS;
mutex_lock(&xs->mutex);
while (xskq_peek_desc(xs->tx, &desc)) {
@ -296,6 +293,8 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
return -ENXIO;
if (unlikely(!(xs->dev->flags & IFF_UP)))
return -ENETDOWN;
if (unlikely(!xs->tx))
return -ENOBUFS;
if (need_wait)
return -EOPNOTSUPP;