diff options
| author |   Andrew Yourtchenko <ayourtch@gmail.com> | 2017-01-03 16:52:22 +0000 |
|---|---|---|
| committer |   Damjan Marion <dmarion.lists@gmail.com> | 2017-01-03 18:25:32 +0000 |
| commit | 0c3d467df4c5651df03895d06444f6e830e9688c (patch) | |
| tree | c5b1dba94a448403517de2e07ad2a48b372fb07b /src | |
| parent | ddcc99ebc9789b198532a2d6cdb3e29256fa58e4 (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')
| -rw-r--r-- | src/vnet/devices/virtio/vhost-user.c | 4 |
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 = |