diff --git a/tune/change-csum.c b/tune/change-csum.c index 7a9f6351..daab70b6 100644 --- a/tune/change-csum.c +++ b/tune/change-csum.c @@ -26,9 +26,68 @@ #include "common/internal.h" #include "tune/tune.h" +static int check_csum_change_requreiment(struct btrfs_fs_info *fs_info) +{ + struct btrfs_root *tree_root = fs_info->tree_root; + struct btrfs_root *dev_root = fs_info->dev_root; + struct btrfs_path path = { 0 }; + struct btrfs_key key; + int ret; + + if (btrfs_super_log_root(fs_info->super_copy)) { + error("dirty log tree detected, please replay the log or zero it."); + return -EINVAL; + } + if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) { + error("no csum change support for extent-tree-v2 feature yet."); + return -EOPNOTSUPP; + } + if (btrfs_super_flags(fs_info->super_copy) & + (BTRFS_SUPER_FLAG_CHANGING_DATA_CSUM | + BTRFS_SUPER_FLAG_CHANGING_META_CSUM)) { + error("resume from half converted status is not yet supported"); + return -EOPNOTSUPP; + } + key.objectid = BTRFS_BALANCE_OBJECTID; + key.type = BTRFS_TEMPORARY_ITEM_KEY; + key.offset = 0; + ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0); + btrfs_release_path(&path); + if (ret < 0) { + errno = -ret; + error("failed to check the balance status: %m"); + return ret; + } + if (ret == 0) { + error("running balance detected, please finish or cancel it."); + return -EINVAL; + } + + key.objectid = 0; + key.type = BTRFS_DEV_REPLACE_KEY; + key.offset = 0; + ret = btrfs_search_slot(NULL, dev_root, &key, &path, 0, 0); + btrfs_release_path(&path); + if (ret < 0) { + errno = -ret; + error("failed to check the dev-reaplce status: %m"); + return ret; + } + if (ret == 0) { + error("running dev-replace detected, please finish or cancel it."); + return -EINVAL; + } + return 0; +} + int btrfs_change_csum_type(struct btrfs_fs_info *fs_info, u16 new_csum_type) { + int ret; + /* Phase 0, check conflicting features. */ + ret = check_csum_change_requreiment(fs_info); + if (ret < 0) + return ret; /* * Phase 1, generate new data csums.