diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/qgroup.c | 60 | ||||
| -rw-r--r-- | fs/btrfs/qgroup.h | 2 |
2 files changed, 62 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 5066274..e05d1f6 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2535,3 +2535,63 @@ cleanup: ulist_free(changeset.range_changed); return ret; } + +static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len, + int free) +{ + struct extent_changeset changeset; + int ret; + + changeset.bytes_changed = 0; + changeset.range_changed = ulist_alloc(GFP_NOFS); + if (!changeset.range_changed) + return -ENOMEM; + + ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, start, + start + len -1, EXTENT_QGROUP_RESERVED, GFP_NOFS, + &changeset); + if (ret < 0) + goto out; + + if (free) + btrfs_qgroup_free(BTRFS_I(inode)->root, + changeset.bytes_changed); +out: + ulist_free(changeset.range_changed); + return ret; +} + +/* + * Free a reserved space range from io_tree and related qgroups + * + * Should be called when a range of pages get invalidated before reaching disk. + * Or for error cleanup case. + * + * For data written to disk, use btrfs_qgroup_release_data(). + * + * NOTE: This function may sleep for memory allocation. + */ +int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len) +{ + return __btrfs_qgroup_release_data(inode, start, len, 1); +} + +/* + * Release a reserved space range from io_tree only. + * + * Should be called when a range of pages get written to disk and corresponding + * FILE_EXTENT is inserted into corresponding root. + * + * Since new qgroup accounting framework will only update qgroup numbers at + * commit_transaction() time, its reserved space shouldn't be freed from + * related qgroups. + * + * But we should release the range from io_tree, to allow further write to be + * COWed. + * + * NOTE: This function may sleep for memory allocation. + */ +int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len) +{ + return __btrfs_qgroup_release_data(inode, start, len, 0); +} diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index bd17cc2..564eb21 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -83,4 +83,6 @@ int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid, /* New io_tree based accurate qgroup reserve API */ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len); +int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len); +int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len); #endif /* __BTRFS_QGROUP__ */ |