diff options
| author | Chris Mason <chris.mason@oracle.com> | 2008-04-22 15:22:07 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 17:04:02 +0200 |
| commit | b30757178dad19a0388d958ff9eea66e674d39ed (patch) | |
| tree | de2ff27889daaa15180d49d3d04474cc8ee1f927 /fs/btrfs/volumes.h | |
| parent | Btrfs: Simplify device selection for mirrored reads (diff) | |
| download | linux-b30757178dad19a0388d958ff9eea66e674d39ed.tar.xz linux-b30757178dad19a0388d958ff9eea66e674d39ed.zip | |
Btrfs: Add a special device list for chunk allocations
This allows other code that needs to walk every device in the FS to do so
without locking against allocations.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index dfe7e8a9507c..a2660d2b6b34 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -24,9 +24,12 @@ struct buffer_head; struct btrfs_device { struct list_head dev_list; + struct list_head dev_alloc_list; struct btrfs_root *dev_root; struct buffer_head *pending_io; + int barriers; + spinlock_t io_lock; struct block_device *bdev; @@ -70,7 +73,11 @@ struct btrfs_fs_devices { u64 num_devices; struct block_device *latest_bdev; struct block_device *lowest_bdev; + /* all of the devices in the FS */ struct list_head devices; + + /* devices not currently being allocated */ + struct list_head alloc_list; struct list_head list; }; |