summaryrefslogtreecommitdiff
path: root/btrfstune.c
diff options
context:
space:
mode:
Diffstat (limited to 'btrfstune.c')
-rw-r--r--btrfstune.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/btrfstune.c b/btrfstune.c
index b8900113..4ccd6d4c 100644
--- a/btrfstune.c
+++ b/btrfstune.c
@@ -198,6 +198,27 @@ out:
return ret;
}
+static int change_device_uuid(struct btrfs_root *root, struct extent_buffer *eb,
+ int slot)
+{
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct btrfs_dev_item *di;
+ int ret = 0;
+
+ di = btrfs_item_ptr(eb, slot, struct btrfs_dev_item);
+ if (fs_info->new_fsid) {
+ if (!memcmp_extent_buffer(eb, fs_info->new_fsid,
+ (unsigned long)btrfs_device_fsid(di),
+ BTRFS_FSID_SIZE))
+ return ret;
+ write_extent_buffer(eb, fs_info->new_fsid,
+ (unsigned long)btrfs_device_fsid(di),
+ BTRFS_FSID_SIZE);
+ ret = write_tree_block(NULL, root, eb);
+ }
+ return ret;
+}
+
static void print_usage(void)
{
fprintf(stderr, "usage: btrfstune [options] device\n");