summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_mount.h
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@infradead.org>2011-05-20 13:45:32 +0000
committerAlex Elder <aelder@sgi.com>2011-05-24 11:17:13 -0500
commite84661aa84e2e003738563f65155d4f12dc474e7 (patch)
tree9f9b6d2fac2048c5fb8c2728bcf2930435890d4f /fs/xfs/xfs_mount.h
parentbf59170a66bc3eaf3ee513aa6ce9774aa2ab5188 (diff)
downloadop-kernel-dev-e84661aa84e2e003738563f65155d4f12dc474e7.zip
op-kernel-dev-e84661aa84e2e003738563f65155d4f12dc474e7.tar.gz
xfs: add online discard support
Now that we have reliably tracking of deleted extents in a transaction we can easily implement "online" discard support which calls blkdev_issue_discard once a transaction commits. The actual discard is a two stage operation as we first have to mark the busy extent as not available for reuse before we can start the actual discard. Note that we don't bother supporting discard for the non-delaylog mode. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
-rw-r--r--fs/xfs/xfs_mount.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 19af0ab..3d68bb2 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -224,6 +224,7 @@ typedef struct xfs_mount {
#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
operations, typically for
disk errors in metadata */
+#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
#define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
user */
#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
OpenPOWER on IntegriCloud