[Libguestfs] [PATCH] mkfs: wipefs before we mkfs
we wipe the filesystem signatures from device before do mkfs,
since we can't trust mkfs can remove the filesystem signature absolutely.
Signed-off-by: Wanlong Gao <gaowanlong(a)cn.fujitsu.com>
---
daemon/mkfs.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/daemon/mkfs.c b/daemon/mkfs.c
index 5475582..19224ec 100644
--- a/daemon/mkfs.c
+++ b/daemon/mkfs.c
@@ -181,6 +181,15 @@ do_mkfs_opts (const char *fstype, const char *device, int blocksize,
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, NULL);
+ /* we wipe the filesystem signatures from device before do mkfs,
+ * since we can't trust mkfs can remove the filesystem signature absolutely.
+ */
+ if (do_wipefs (device)) {
+ reply_with_error ("%s: %s: %s", fstype, device, err);
+ free (err);
+ return -1;
+ }
+
r = commandv (NULL, &err, argv);
if (r == -1) {
reply_with_error ("%s: %s: %s", fstype, device, err);
--
1.7.9