linux/fs/xfs/xfs_discard.h

#ifndef XFS_DISCARD_H
#define XFS_DISCARD_H 1

struct fstrim_range;
struct list_head;

extern int	xfs_ioc_trim(struct xfs_mount *, struct fstrim_range __user *);
extern int	xfs_discard_extents(struct xfs_mount *, struct list_head *);

#endif /* XFS_DISCARD_H */
xfs: add FITRIM support Allow manual discards from userspace using the FITRIM ioctl. This is not intended to be run during normal workloads, as the freepsace btree walks can cause large performance degradation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com> 2011-01-07 21:02:04 +08:00			`#ifndef XFS_DISCARD_H`
			`#define XFS_DISCARD_H 1`

			`struct fstrim_range;`
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> 2011-05-20 21:45:32 +08:00			`struct list_head;`
xfs: add FITRIM support Allow manual discards from userspace using the FITRIM ioctl. This is not intended to be run during normal workloads, as the freepsace btree walks can cause large performance degradation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com> 2011-01-07 21:02:04 +08:00
			`extern int xfs_ioc_trim(struct xfs_mount , struct fstrim_range __user );`
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> 2011-05-20 21:45:32 +08:00			`extern int xfs_discard_extents(struct xfs_mount , struct list_head );`
xfs: add FITRIM support Allow manual discards from userspace using the FITRIM ioctl. This is not intended to be run during normal workloads, as the freepsace btree walks can cause large performance degradation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com> 2011-01-07 21:02:04 +08:00
			`#endif /* XFS_DISCARD_H */`