diff options
| author | Miao Xie <miaox@cn.fujitsu.com> | 2013-01-29 14:13:12 +0400 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-02-20 21:59:08 +0400 |
| commit | de98ced9e743656d108de41841797def0f5cb951 (patch) | |
| tree | 52314be4abe2cd2510712e8b629d58d8d01d5e0a /fs/btrfs/ctree.h | |
| parent | df0af1a57f72c74d53a9377c60ff20095afab97d (diff) | |
| download | linux-de98ced9e743656d108de41841797def0f5cb951.tar.xz | |
Btrfs: use seqlock to protect fs_info->avail_{data, metadata, system}_alloc_bits
There is no lock to protect
fs_info->avail_{data, metadata, system}_alloc_bits,
it may introduce some problem, such as the wrong profile
information, so we add a seqlock to protect them.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 50def99f5379..5f5c30aaef36 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1483,6 +1483,8 @@ struct btrfs_fs_info { struct rb_root defrag_inodes; atomic_t defrag_running; + /* Used to protect avail_{data, metadata, system}_alloc_bits */ + seqlock_t profiles_lock; /* * these three are in extended format (availability of single * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other |