[PATCH 5/5] nodedev: Only set up mdevctl monitors if mdevctl.d exist

[Michal Privoznik]

During its initialization, the nodedev driver tries to set up
monitors for /etc/mdevctl.d directory, so that it can register
mdevs as they come and go. However, if the file doesn't exist
there is nothing to monitor and therefore we can exit early. In
fact, we have to otherwise monitorFileRecursively() fails and
whole driver initialization fails with it.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 src/node_device/node_device_udev.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c
index 18219175c5..c4040c2fd6 100644
--- a/src/node_device/node_device_udev.c
+++ b/src/node_device/node_device_udev.c
@@ -2122,7 +2122,13 @@ monitorFileRecursively(udevEventData *udev,
 static int
 mdevctlEnableMonitor(udevEventData *priv)
 {
-    g_autoptr(GFile) mdevctlConfigDir = g_file_new_for_path("/etc/mdevctl.d");
+    g_autoptr(GFile) mdevctlConfigDir = NULL;
+    const char *mdevctlDir = "/etc/mdevctl.d";
+
+    if (!virFileExists(mdevctlDir))
+        return 0;
+
+    mdevctlConfigDir = g_file_new_for_path("/etc/mdevctl.d");
 
     /* mdevctl may add notification events in the future:
      * https://github.com/mdevctl/mdevctl/issues/27. For now, fall back to
-- 
2.26.3