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btrfs: fix qgroup_free wrong num_bytes in btrfs_subvolume_reserve_metadata
After btrfs_qgroup_reserve_meta_prealloc(), num_bytes will be assigned
again by btrfs_calc_trans_metadata_size(). Once block_rsv fails, we
can't properly free the num_bytes of the previous qgroup_reserve. Use a
separate variable to store the num_bytes of the qgroup_reserve.
Delete the comment for the qgroup_reserved that does not exist and add a
comment about use_global_rsv.
Fixes: c4c129db5d
("btrfs: drop unused parameter qgroup_reserved")
CC: stable@vger.kernel.org # 4.18+
Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
parent
de02b9f6bb
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@ -5800,7 +5800,7 @@ void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans)
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* root: the root of the parent directory
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* rsv: block reservation
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* items: the number of items that we need do reservation
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* qgroup_reserved: used to return the reserved size in qgroup
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* use_global_rsv: allow fallback to the global block reservation
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*
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* This function is used to reserve the space for snapshot/subvolume
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* creation and deletion. Those operations are different with the
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@ -5810,10 +5810,10 @@ void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans)
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* the space reservation mechanism in start_transaction().
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*/
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int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
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struct btrfs_block_rsv *rsv,
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int items,
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struct btrfs_block_rsv *rsv, int items,
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bool use_global_rsv)
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{
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u64 qgroup_num_bytes = 0;
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u64 num_bytes;
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int ret;
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struct btrfs_fs_info *fs_info = root->fs_info;
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@ -5821,12 +5821,11 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
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if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) {
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/* One for parent inode, two for dir entries */
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num_bytes = 3 * fs_info->nodesize;
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ret = btrfs_qgroup_reserve_meta_prealloc(root, num_bytes, true);
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qgroup_num_bytes = 3 * fs_info->nodesize;
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ret = btrfs_qgroup_reserve_meta_prealloc(root,
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qgroup_num_bytes, true);
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if (ret)
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return ret;
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} else {
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num_bytes = 0;
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}
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num_bytes = btrfs_calc_trans_metadata_size(fs_info, items);
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@ -5838,8 +5837,8 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
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if (ret == -ENOSPC && use_global_rsv)
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ret = btrfs_block_rsv_migrate(global_rsv, rsv, num_bytes, 1);
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if (ret && num_bytes)
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btrfs_qgroup_free_meta_prealloc(root, num_bytes);
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if (ret && qgroup_num_bytes)
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btrfs_qgroup_free_meta_prealloc(root, qgroup_num_bytes);
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return ret;
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}
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