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| author | Qu Wenruo | 2017-02-27 08:10:38 +0100 |
|---|---|---|
| committer | David Sterba | 2017-06-29 20:17:02 +0200 |
| commit | 364ecf3651e0862152c8b340d7cb3021dc0122c7 (patch) | |
| tree | 9e1e9d93a88677df69305345f02efae073c042b3 /fs/btrfs/relocation.c | |
| parent | btrfs: qgroup: Fix qgroup reserved space underflow caused by buffered write a... (diff) | |
| download | kernel-qcow2-linux-364ecf3651e0862152c8b340d7cb3021dc0122c7.tar.gz kernel-qcow2-linux-364ecf3651e0862152c8b340d7cb3021dc0122c7.tar.xz kernel-qcow2-linux-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/relocation.c')
| -rw-r--r-- | fs/btrfs/relocation.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index b291d1bebb4c..6407423151ab 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3093,11 +3093,12 @@ int prealloc_file_extent_cluster(struct inode *inode, u64 prealloc_start = cluster->start - offset; u64 prealloc_end = cluster->end - offset; u64 cur_offset; + struct extent_changeset *data_reserved = NULL; BUG_ON(cluster->start != cluster->boundary[0]); inode_lock(inode); - ret = btrfs_check_data_free_space(inode, prealloc_start, + ret = btrfs_check_data_free_space(inode, &data_reserved, prealloc_start, prealloc_end + 1 - prealloc_start); if (ret) goto out; @@ -3129,6 +3130,7 @@ int prealloc_file_extent_cluster(struct inode *inode, prealloc_end + 1 - cur_offset); out: inode_unlock(inode); + extent_changeset_free(data_reserved); return ret; } |