@@ -7914,6 +7914,63 @@ static int record_unaligned_extent_rec(struct btrfs_fs_info *fs_info,
return ret;
}
+static int repair_extent_item_generation(struct btrfs_fs_info *fs_info,
+ struct extent_record *rec)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_path path;
+ struct btrfs_key key;
+ struct btrfs_extent_item *ei;
+ struct btrfs_root *extent_root = fs_info->extent_root;
+ u64 new_gen = 0;;
+ int ret;
+
+ key.objectid = rec->start;
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ get_extent_item_generation(fs_info, rec->start, &new_gen);
+ trans = btrfs_start_transaction(extent_root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ errno = -ret;
+ error("failed to start transaction: %m");
+ return ret;
+ }
+ btrfs_init_path(&path);
+ ret = btrfs_search_slot(trans, extent_root, &key, &path, 0, 1);
+ /* Not possible */
+ if (ret == 0)
+ ret = -EUCLEAN;
+ if (ret < 0)
+ goto out;
+ ret = btrfs_previous_extent_item(extent_root, &path, rec->start);
+ if (ret > 0)
+ ret = -ENOENT;
+ if (ret < 0)
+ goto out;
+
+ if (!new_gen)
+ new_gen = trans->transid;
+ ei = btrfs_item_ptr(path.nodes[0], path.slots[0],
+ struct btrfs_extent_item);
+ btrfs_set_extent_generation(path.nodes[0], ei, new_gen);
+ ret = btrfs_commit_transaction(trans, extent_root);
+ if (ret < 0) {
+ errno = -ret;
+ error("failed to commit transaction: %m");
+ goto out;
+ }
+ printf("Reset extent item (%llu) generation to %llu\n",
+ key.objectid, new_gen);
+ rec->generation = new_gen;
+out:
+ btrfs_release_path(&path);
+ if (ret < 0)
+ btrfs_abort_transaction(trans, ret);
+ return ret;
+}
+
static int check_extent_refs(struct btrfs_root *root,
struct cache_tree *extent_cache)
{
@@ -8004,11 +8061,20 @@ static int check_extent_refs(struct btrfs_root *root,
}
if (rec->generation > super_gen + 1) {
- error(
+ bool repaired = false;
+ if (repair) {
+ ret = repair_extent_item_generation(
+ root->fs_info, rec);
+ if (ret == 0)
+ repaired = true;
+ }
+ if (!repaired) {
+ error(
"invalid generation for extent %llu, have %llu expect (0, %llu]",
- rec->start, rec->generation,
- super_gen + 1);
- cur_err = 1;
+ rec->start, rec->generation,
+ super_gen + 1);
+ cur_err = 1;
+ }
}
if (rec->refs != rec->extent_item_refs) {
fprintf(stderr, "ref mismatch on [%llu %llu] ",
This is pretty much the same as the lowmem mode, it will try to reset the extent item generation using either the tree block generation or current transid. Signed-off-by: Qu Wenruo <wqu@suse.com> --- check/main.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 70 insertions(+), 4 deletions(-)