btrfs: Modify btrfs availability to test if the kernel supports btrfs.

This is closer to the real meaning of "availability of btrfs", since just having the btrfs tool doesn't help much if it's not supported by the kernel too.
libguestfs · Jun 9, 2012 · 011666a · 011666a
1 parent 4ba6aa3
commit 011666a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/daemon/btrfs.c b/daemon/btrfs.c
@@ -31,7 +31,7 @@
 int
 optgroup_btrfs_available (void)
 {
-  return prog_exists ("btrfs");
+  return prog_exists ("btrfs") && filesystem_available ("btrfs") > 0;
 }
 
 /* Takes optional arguments, consult optargs_bitmask. */