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| author | Miao Xie <miaox@cn.fujitsu.com> | 2014-11-25 11:39:28 +0300 |
|---|---|---|
| committer | Miao Xie <miaox@cn.fujitsu.com> | 2014-12-03 05:18:47 +0300 |
| commit | 4245215d6a8dba1a51c50533b6667919687c0b89 (patch) | |
| tree | d3d988c61ff1dcf8fe6886e3c2ba3783814d614e /fs/btrfs/raid56.h | |
| parent | 7603597690147a16b5cc77047d7570fa22a22673 (diff) | |
| download | linux-4245215d6a8dba1a51c50533b6667919687c0b89.tar.xz | |
Btrfs, raid56: fix use-after-free problem in the final device replace procedure on raid56
The commit c404e0dc (Btrfs: fix use-after-free in the finishing
procedure of the device replace) fixed a use-after-free problem
which happened when removing the source device at the end of device
replace, but at that time, btrfs didn't support device replace
on raid56, so we didn't fix the problem on the raid56 profile.
Currently, we implemented device replace for raid56, so we need
kick that problem out before we enable that function for raid56.
The fix method is very simple, we just increase the bio per-cpu
counter before we submit a raid56 io, and decrease the counter
when the raid56 io ends.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Diffstat (limited to 'fs/btrfs/raid56.h')
| -rw-r--r-- | fs/btrfs/raid56.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/raid56.h b/fs/btrfs/raid56.h index 3d4ddb3d861d..31d4a157b5e3 100644 --- a/fs/btrfs/raid56.h +++ b/fs/btrfs/raid56.h @@ -43,8 +43,8 @@ struct btrfs_raid_bio; struct btrfs_device; int raid56_parity_recover(struct btrfs_root *root, struct bio *bio, - struct btrfs_bio *bbio, u64 *raid_map, - u64 stripe_len, int mirror_num, int hold_bbio); + struct btrfs_bio *bbio, u64 *raid_map, + u64 stripe_len, int mirror_num, int generic_io); int raid56_parity_write(struct btrfs_root *root, struct bio *bio, struct btrfs_bio *bbio, u64 *raid_map, u64 stripe_len); |