@@ -3588,40 +3588,55 @@ out:
* means error after repair
* Returns 0 nothing happened
*/
-static int repair_extent_item(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, struct btrfs_path *path,
+static int repair_extent_item(struct btrfs_root *root, struct btrfs_path *path,
u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
u64 owner, u64 offset, int err)
{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *extent_root = root->fs_info->extent_root;
struct btrfs_key old_key;
int freed = 0;
int ret;
btrfs_item_key_to_cpu(path->nodes[0], &old_key, path->slots[0]);
- if (err & (REFERENCER_MISSING | REFERENCER_MISMATCH)) {
- /* delete the backref */
- ret = btrfs_free_extent(trans, root->fs_info->fs_root, bytenr,
- num_bytes, parent, root_objectid, owner, offset);
- if (!ret) {
- freed = 1;
- err &= ~REFERENCER_MISSING;
- printf("Delete backref in extent [%llu %llu]\n",
- bytenr, num_bytes);
- } else {
- error("fail to delete backref in extent [%llu %llu]",
- bytenr, num_bytes);
- }
+ if ((err & (REFERENCER_MISSING | REFERENCER_MISMATCH)) == 0)
+ return err;
+
+ ret = avoid_extents_overwrite(root->fs_info);
+ if (ret)
+ return err;
+
+ trans = btrfs_start_transaction(extent_root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ error("fail to start transaction %s", strerror(-ret));
+ /* nothing happened */
+ ret = 0;
+ goto out;
}
+ /* delete the backref */
+ ret = btrfs_free_extent(trans, root->fs_info->fs_root, bytenr,
+ num_bytes, parent, root_objectid, owner, offset);
+ if (!ret) {
+ freed = 1;
+ err &= ~REFERENCER_MISSING;
+ printf("Delete backref in extent [%llu %llu]\n",
+ bytenr, num_bytes);
+ } else {
+ error("fail to delete backref in extent [%llu %llu]",
+ bytenr, num_bytes);
+ }
+ btrfs_commit_transaction(trans, extent_root);
/* btrfs_free_extent may delete the extent */
btrfs_release_path(path);
ret = btrfs_search_slot(NULL, root, &old_key, path, 0, 0);
-
if (ret)
ret = -ENOENT;
else if (freed)
ret = err;
+out:
return ret;
}
@@ -3631,8 +3646,7 @@ static int repair_extent_item(struct btrfs_trans_handle *trans,
*
* Since we don't use extent_record anymore, introduce new error bit
*/
-static int check_extent_item(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
+static int check_extent_item(struct btrfs_fs_info *fs_info,
struct btrfs_path *path)
{
struct btrfs_extent_item *ei;
@@ -3763,7 +3777,7 @@ next:
}
if (err && repair) {
- ret = repair_extent_item(trans, fs_info->extent_root, path,
+ ret = repair_extent_item(fs_info->extent_root, path,
key.objectid, num_bytes, parent, root_objectid,
owner, owner_offset, ret);
if (ret < 0)
@@ -4183,7 +4197,7 @@ again:
break;
case BTRFS_EXTENT_ITEM_KEY:
case BTRFS_METADATA_ITEM_KEY:
- ret = check_extent_item(trans, fs_info, path);
+ ret = check_extent_item(fs_info, path);
err |= ret;
break;
case BTRFS_EXTENT_CSUM_KEY:
This patch removes parameter @trans of repair_extent_item(). It calls try_avoid_extents_overwrite() and starts a transaction by itself. Note: This patch and next patches cause error in lowmem repair like: "Error: Commit_root already set when starting transaction". This error will disappear after removing @trans finished. Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com> --- check/mode-lowmem.c | 54 +++++++++++++++++++++++++++++++++-------------------- 1 file changed, 34 insertions(+), 20 deletions(-)