This patch fixes a FD leak in the VDUSE device reconnect
code fails to start the device.
Also take the opportunity to refactor the related code into
a dedicated function.
Fixes: da79cc7fda76 ("vhost: add reconnection support to VDUSE")
Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
lib/vhost/vduse.c | 63 +++++++++++++++++++++++++++++++----------------
1 file changed, 42 insertions(+), 21 deletions(-)
diff --git a/lib/vhost/vduse.c b/lib/vhost/vduse.c
index d1373d0549..c8c4761293 100644
--- a/lib/vhost/vduse.c
+++ b/lib/vhost/vduse.c
@@ -476,6 +476,46 @@ vduse_reconnect_handler(int fd, void *arg, int *remove)
*remove = 1;
}
+static int
+vduse_reconnect_start_device(struct virtio_net *dev)
+{
+ int fd, ret;
+
+ /*
+ * Make vduse_device_start() being executed in the same
+ * context for both reconnection and fresh startup.
+ */
+ fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+ if (fd < 0) {
+ VHOST_CONFIG_LOG(dev->ifname, ERR, "Failed to create reconnect efd:
%s",
+ strerror(errno));
+ ret = -1;
+ goto out_err;
+ }
+
+ ret = fdset_add(vduse.fdset, fd, vduse_reconnect_handler, NULL, dev);
+ if (ret) {
+ VHOST_CONFIG_LOG(dev->ifname, ERR, "Failed to add reconnect efd %d
to vduse fdset",
+ fd);
+ goto out_err_close;
+ }
+
+ ret = eventfd_write(fd, (eventfd_t)1);
+ if (ret < 0) {
+ VHOST_CONFIG_LOG(dev->ifname, ERR, "Failed to write to reconnect
eventfd");
+ goto out_err_fdset;
+ }
+
+ return 0;
+
+out_err_fdset:
+ fdset_del(vduse.fdset, fd);
+out_err_close:
+ close(fd);
+out_err:
+ return ret;
+}
+
int
vduse_device_create(const char *path, bool compliant_ol_flags)
{
@@ -741,28 +781,9 @@ vduse_device_create(const char *path, bool
compliant_ol_flags)
}
if (reconnect && dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK) {
- /*
- * Make vduse_device_start() being executed in the same
- * context for both reconnection and fresh startup.
- */
- reco_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
- if (reco_fd < 0) {
- VHOST_CONFIG_LOG(name, ERR, "Failed to create reco_fd:
%s",
- strerror(errno));
- ret = -1;
- goto out_dev_destroy;
- }
-
- ret = fdset_add(vduse.fdset, reco_fd, vduse_reconnect_handler,
NULL, dev);
+ ret = vduse_reconnect_start_device(dev);
if (ret) {
- VHOST_CONFIG_LOG(name, ERR, "Failed to add reconnect fd %d
to vduse fdset",
- reco_fd);
- goto out_dev_destroy;
- }
-
- ret = eventfd_write(reco_fd, (eventfd_t)1);
- if (ret < 0) {
- VHOST_CONFIG_LOG(name, ERR, "Failed to write to reconnect
eventfd");
+ VHOST_CONFIG_LOG(name, ERR, "Failed to start device at
reconnection");
