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authorAndrew Yourtchenko <ayourtch@gmail.com>2017-01-03 16:52:22 +0000
committerDamjan Marion <dmarion.lists@gmail.com>2017-01-03 18:25:32 +0000
commit0c3d467df4c5651df03895d06444f6e830e9688c (patch)
treec5b1dba94a448403517de2e07ad2a48b372fb07b /src/vnet/devices/virtio/vhost-user.c
parentddcc99ebc9789b198532a2d6cdb3e29256fa58e4 (diff)
VPP-574: fix VPP hang during security group configuration on a suspended VM
The unix connect() in vhost-user driver in VPP is blocking, and a non-expedient accept() on the other side causes the entire VPP to hang. Solution: set the nonblocking flag for the socket fd before calling connect(), and set the socket back to blocking after the accept() succeeds. Change-Id: Ia5ee782037eeffabdad71db8241f476a048a4f6f Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
Diffstat (limited to 'src/vnet/devices/virtio/vhost-user.c')
-rw-r--r--src/vnet/devices/virtio/vhost-user.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/vhost-user.c b/src/vnet/devices/virtio/vhost-user.c
index f9bbae4f90f..3fbcee90752 100644
--- a/src/vnet/devices/virtio/vhost-user.c
+++ b/src/vnet/devices/virtio/vhost-user.c
@@ -2325,9 +2325,13 @@ vhost_user_process (vlib_main_t * vm,
strncpy (sun.sun_path, (char *) vui->sock_filename,
sizeof (sun.sun_path) - 1);
+ /* Avoid hanging VPP if the other end does not accept */
+ fcntl(sockfd, F_SETFL, O_NONBLOCK);
if (connect (sockfd, (struct sockaddr *) &sun,
sizeof (struct sockaddr_un)) == 0)
{
+ /* Set the socket to blocking as it was before */
+ fcntl(sockfd, F_SETFL, 0);
vui->sock_errno = 0;
template.file_descriptor = sockfd;
template.private_data =