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| author | Sage Weil <sage@newdream.net> | 2009-04-02 16:59:01 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-04-02 16:59:01 -0400 |
| commit | dccae99995089641fbac452ebc7f0cab18751ddb (patch) | |
| tree | c8f3611cc62baa6fa02baff18374d8f3a61b06bf /fs/btrfs/ctree.h | |
| parent | 3a5e14048a0a81276d284cbda441507a17e26147 (diff) | |
| download | blackbird-op-linux-dccae99995089641fbac452ebc7f0cab18751ddb.tar.gz blackbird-op-linux-dccae99995089641fbac452ebc7f0cab18751ddb.zip | |
Btrfs: add flushoncommit mount option
The 'flushoncommit' mount option forces any data dirtied by a write in a
prior transaction to commit as part of the current commit. This makes
the committed state a fully consistent view of the file system from the
application's perspective (i.e., it includes all completed file system
operations). This was previously the behavior only when a snapshot is
created.
This is used by Ceph to ensure that completed writes make it to the
platter along with the metadata operations they are bound to (by
BTRFS_IOC_TRANS_{START,END}).
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 1e99a9948637..bb6ac5b87652 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1037,6 +1037,7 @@ struct btrfs_root { #define BTRFS_MOUNT_DEGRADED (1 << 4) #define BTRFS_MOUNT_COMPRESS (1 << 5) #define BTRFS_MOUNT_NOTREELOG (1 << 6) +#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
