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| author | Qu Wenruo | 2015-10-26 07:11:18 +0100 |
|---|---|---|
| committer | Chris Mason | 2015-10-27 03:44:39 +0100 |
| commit | 5846a3c26873e86b034c702a8bc202aa76082369 (patch) | |
| tree | 8495bf1ae8236d363579751a63414ba31c498a0d /fs/btrfs/extent-tree.c | |
| parent | btrfs: clear PF_NOFREEZE in cleaner_kthread() (diff) | |
| download | kernel-qcow2-linux-5846a3c26873e86b034c702a8bc202aa76082369.tar.gz kernel-qcow2-linux-5846a3c26873e86b034c702a8bc202aa76082369.tar.xz kernel-qcow2-linux-5846a3c26873e86b034c702a8bc202aa76082369.zip | |
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/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index c1f8c7e27a6d..f50c7c2e2b59 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2087,8 +2087,8 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, BTRFS_ADD_DELAYED_REF, NULL); } else { ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr, - num_bytes, - parent, root_objectid, owner, offset, + num_bytes, parent, root_objectid, + owner, offset, 0, BTRFS_ADD_DELAYED_REF, NULL); } return ret; @@ -6832,8 +6832,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr, num_bytes, parent, root_objectid, owner, - offset, BTRFS_DROP_DELAYED_REF, - NULL); + offset, 0, + BTRFS_DROP_DELAYED_REF, NULL); } return ret; } @@ -7759,7 +7759,8 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 root_objectid, u64 owner, - u64 offset, struct btrfs_key *ins) + u64 offset, u64 ram_bytes, + struct btrfs_key *ins) { int ret; @@ -7768,7 +7769,8 @@ int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, ret = btrfs_add_delayed_data_ref(root->fs_info, trans, ins->objectid, ins->offset, 0, root_objectid, owner, offset, - BTRFS_ADD_DELAYED_EXTENT, NULL); + ram_bytes, BTRFS_ADD_DELAYED_EXTENT, + NULL); return ret; } |