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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2017-02-27 15:10:38 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-29 20:17:02 +0200 |
| commit | 364ecf3651e0862152c8b340d7cb3021dc0122c7 (patch) | |
| tree | 9e1e9d93a88677df69305345f02efae073c042b3 /fs/btrfs/qgroup.h | |
| parent | a12b877b557dde885bdb6978cec86bf761e63c9a (diff) | |
| download | lwn-364ecf3651e0862152c8b340d7cb3021dc0122c7.tar.gz lwn-364ecf3651e0862152c8b340d7cb3021dc0122c7.zip | |
btrfs: qgroup: Introduce extent changeset for qgroup reserve functions
Introduce a new parameter, struct extent_changeset for
btrfs_qgroup_reserved_data() and its callers.
Such extent_changeset was used in btrfs_qgroup_reserve_data() to record
which range it reserved in current reserve, so it can free it in error
paths.
The reason we need to export it to callers is, at buffered write error
path, without knowing what exactly which range we reserved in current
allocation, we can free space which is not reserved by us.
This will lead to qgroup reserved space underflow.
Reviewed-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.h')
| -rw-r--r-- | fs/btrfs/qgroup.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index d11125d6afb9..99408e93eb0d 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -242,7 +242,8 @@ int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid, #endif /* New io_tree based accurate qgroup reserve API */ -int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len); +int btrfs_qgroup_reserve_data(struct inode *inode, + struct extent_changeset **reserved, 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); |