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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2015-10-26 09:11:18 +0300 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-10-27 05:44:39 +0300 |
| commit | 5846a3c26873e86b034c702a8bc202aa76082369 (patch) | |
| tree | 8495bf1ae8236d363579751a63414ba31c498a0d /fs/btrfs/delayed-ref.h | |
| parent | 696249132158014d594896df3a81390616069c5c (diff) | |
| download | linux-5846a3c26873e86b034c702a8bc202aa76082369.tar.xz | |
btrfs: qgroup: Fix a race in delayed_ref which leads to abort trans
Between btrfs_allocerved_file_extent() and
btrfs_add_delayed_qgroup_reserve(), there is a window that delayed_refs
are run and delayed ref head maybe freed before
btrfs_add_delayed_qgroup_reserve().
This will cause btrfs_dad_delayed_qgroup_reserve() to return -ENOENT,
and cause transaction to be aborted.
This patch will record qgroup reserve space info into delayed_ref_head
at btrfs_add_delayed_ref(), to eliminate the race window.
Reported-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/delayed-ref.h')
| -rw-r--r-- | fs/btrfs/delayed-ref.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index f9cf2345b864..00ed02cbf3e9 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -248,7 +248,7 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans, u64 bytenr, u64 num_bytes, u64 parent, u64 ref_root, - u64 owner, u64 offset, int action, + u64 owner, u64 offset, u64 reserved, int action, struct btrfs_delayed_extent_op *extent_op); int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans, |