diff options
Diffstat (limited to 'btrfstune.c')
| -rw-r--r-- | btrfstune.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/btrfstune.c b/btrfstune.c index 77a8b7ac..9a63f41b 100644 --- a/btrfstune.c +++ b/btrfstune.c @@ -262,6 +262,34 @@ out: return ret; } +static int change_fsid_prepare(struct btrfs_fs_info *fs_info) +{ + u64 flags = btrfs_super_flags(fs_info->super_copy); + + if (!fs_info->new_fsid && !fs_info->new_chunk_tree_uuid) + return 0; + + if (fs_info->new_fsid) + flags |= BTRFS_SUPER_FLAG_CHANGING_FSID; + btrfs_set_super_flags(fs_info->super_copy, flags); + + return write_all_supers(fs_info->tree_root); +} + +static int change_fsid_done(struct btrfs_fs_info *fs_info) +{ + u64 flags = btrfs_super_flags(fs_info->super_copy); + + if (!fs_info->new_fsid && !fs_info->new_chunk_tree_uuid) + return 0; + + if (fs_info->new_fsid) + flags &= ~BTRFS_SUPER_FLAG_CHANGING_FSID; + btrfs_set_super_flags(fs_info->super_copy, flags); + + return write_all_supers(fs_info->tree_root); +} + static void print_usage(void) { fprintf(stderr, "usage: btrfstune [options] device\n"); |