[Libguestfs] [PATCH v3.1 5/9] New API: btrfs_set_uuid_random

[Chen Hanxiao]

Signed-off-by: Chen Hanxiao <chenhanxiao at cn.fujitsu.com>
---
 daemon/btrfs.c  | 21 +++++++++++++++++++++
 daemon/daemon.h |  1 +
 2 files changed, 22 insertions(+)

diff --git a/daemon/btrfs.c b/daemon/btrfs.c
index a69c512..a3f3590 100644
--- a/daemon/btrfs.c
+++ b/daemon/btrfs.c
@@ -867,6 +867,27 @@ btrfs_set_uuid (const char *device, const char *uuid)
   return 0;
 }
 
+int
+btrfs_set_uuid_random (const char *device)
+{
+  CLEANUP_FREE char *err = NULL;
+  int r;
+  int has_uuid_opts = test_btrfstune_uuid_opt();
+
+  if (has_uuid_opts <= 0) {
+    reply_with_error_errno (ENOTSUP, "btrfs filesystems' UUID cannot be changed");
+    return -1;
+  }
+
+  r = commandr (NULL, &err, str_btrfstune, "-f", "-u", device, NULL);
+  if (r == -1) {
+    reply_with_error ("%s: %s", device, err);
+    return -1;
+  }
+
+  return 0;
+}
+
 /* Takes optional arguments, consult optargs_bitmask. */
 int
 do_btrfs_fsck (const char *device, int64_t superblock, int repair)
diff --git a/daemon/daemon.h b/daemon/daemon.h
index d4c8c11..5087327 100644
--- a/daemon/daemon.h
+++ b/daemon/daemon.h
@@ -270,6 +270,7 @@ extern char *debug_bmap_device (const char *subcmd, size_t argc, char *const *co
 /*-- in btrfs.c --*/
 extern char *btrfs_get_label (const char *device);
 extern int btrfs_set_uuid (const char *device, const char *uuid);
+extern int btrfs_set_uuid_random (const char *device);
 
 /*-- in ntfs.c --*/
 extern char *ntfs_get_label (const char *device);
-- 
2.1.0