btrfs-progs: print errno string when /dev/btrfs-control open fails

Of recently and intermittently I am seeing open fail for /dev/btrfs-control (btrfs is loaded), and there are no dmesg errors, this may not be a complete help in digging this issue but something which is necessary. Thanks Signed-off-by: Anand Jain <[email protected]> Signed-off-by: David Sterba <[email protected]>
talakad · Mar 14, 2013 · 44a33d0 · 44a33d0
1 parent b14d06d
commit 44a33d0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/utils.c b/utils.c
@@ -1024,7 +1024,8 @@ void btrfs_register_one_device(char *fname)
 	fd = open("/dev/btrfs-control", O_RDONLY);
 	if (fd < 0) {
 		fprintf(stderr, "failed to open /dev/btrfs-control "
-			"skipping device registration\n");
+			"skipping device registration: %s\n",
+			strerror(errno));
 		return;
 	}
 	strncpy(args.name, fname, BTRFS_PATH_NAME_MAX);