From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 6 Dec 2012 13:32:55 +0000 (+0100)
Subject: blkdebug: Allow usage without config file
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=312a2ba0eb8ab19646517aeaa785475d3fbcfd51;p=qemu.git

blkdebug: Allow usage without config file

As soon as new rules can be set during runtime, as introduced by the
next patch, blkdebug makes sense even without a config file.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---

diff --git a/block/blkdebug.c b/block/blkdebug.c
index d61ece86a9..c9041ec3d2 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -240,6 +240,11 @@ static int read_config(BDRVBlkdebugState *s, const char *filename)
     int ret;
     struct add_rule_data d;
 
+    /* Allow usage without config file */
+    if (!*filename) {
+        return 0;
+    }
+
     f = fopen(filename, "r");
     if (f == NULL) {
         return -errno;