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vcl: fix nonblocking accept with >1 event in the queue

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We discard unwanted events until we get an ACCEPTED.
But if we are non-blocking we need to check the queue
length every time and EAGAIN if empty before waiting.

Type: fix

Signed-off-by: Carl Smith <carl.smith@alliedtelesis.co.nz>
Change-Id: Ie0c7e5cb00f0d37d2e1534f8bb384221ff56f2e3
(cherry picked from commit 592a909a302262cf4088a5468b8e427f577725e8)
This commit is contained in:
Carl Smith
2019-11-12 14:57:37 +13:00
committed by Andrew Yourtchenko
parent 49cf46e0d0
commit c48306407b
1 changed files with 3 additions and 3 deletions
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6
src/vcl/vppcom.c
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@ -1464,11 +1464,11 @@ vppcom_session_accept (uint32_t listen_session_handle, vppcom_endpt_t * ep,
is_nonblocking = VCL_SESS_ATTR_TEST (listen_session->attr,
VCL_SESS_ATTR_NONBLOCK);
if (svm_msg_q_is_empty (wrk->app_event_queue) && is_nonblocking)
return VPPCOM_EAGAIN;
while (1)
{
if (svm_msg_q_is_empty (wrk->app_event_queue) && is_nonblocking)
return VPPCOM_EAGAIN;
if (svm_msg_q_sub (wrk->app_event_queue, &msg, SVM_Q_WAIT, 0))
return VPPCOM_EAGAIN;