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4363ac7c13
linux/drivers/md
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Martin K. Petersen 4363ac7c13 block: Implement support for WRITE SAME 
The WRITE SAME command supported on some SCSI devices allows the same
block to be efficiently replicated throughout a block range. Only a
single logical block is transferred from the host and the storage device
writes the same data to all blocks described by the I/O.

This patch implements support for WRITE SAME in the block layer. The
blkdev_issue_write_same() function can be used by filesystems and block
drivers to replicate a buffer across a block range. This can be used to
efficiently initialize software RAID devices, etc.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-09-20 14:31:45 +02:00
..
persistent-data dm persistent data: introduce dm_bm_set_read_only 2012-07-27 15:08:15 +01:00
bitmap.c md/raid1: submit IO from originating thread instead of md thread. 2012-08-02 08:33:20 +10:00
bitmap.h md/bitmap: record the space available for the bitmap in the superblock. 2012-05-22 13:55:34 +10:00
dm-bio-record.h
dm-bufio.c dm bufio: prefetch 2012-03-28 18:41:29 +01:00
dm-bufio.h dm bufio: prefetch 2012-03-28 18:41:29 +01:00
dm-crypt.c block: Add bio_clone_bioset(), bio_clone_kmalloc() 2012-09-09 10:35:39 +02:00
dm-delay.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-exception-store.c dm: replace simple_strtoul 2012-07-27 15:07:59 +01:00
dm-exception-store.h dm snapshot: test chunk size against both origin and snapshot 2010-08-12 04:13:51 +01:00
dm-flakey.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-io.c block: Generalized bio pool freeing 2012-09-09 10:35:38 +02:00
dm-ioctl.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-kcopyd.c dm kcopyd: add dm_kcopyd_zero to zero an area 2011-10-31 20:18:58 +00:00
dm-linear.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-log-userspace-base.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c connector/userns: replace netlink uses of cap_raised() with capable() 2012-05-10 23:21:39 -04:00
dm-log-userspace-transfer.h
dm-log.c dm: use memweight() 2012-07-30 17:25:16 -07:00
dm-mpath.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-mpath.h
dm-path-selector.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-path-selector.h
dm-queue-length.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-raid1.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-raid.c Merge branch 'for-next' of git://neil.brown.name/md 2012-08-01 09:02:01 -07:00
dm-region-hash.c dm raid1: fix crash with mirror recovery and discard 2012-07-20 14:25:03 +01:00
dm-round-robin.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-service-time.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-snap-persistent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap-transient.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-stripe.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-sysfs.c
dm-table.c dm: allow targets to request flushes regardless of underlying device support 2012-07-27 15:08:07 +01:00
dm-target.c dm: error return error for discards 2010-08-12 04:14:14 +01:00
dm-thin-metadata.c dm thin metadata: introduce dm_pool_abort_metadata 2012-07-27 15:08:15 +01:00
dm-thin-metadata.h dm thin metadata: introduce dm_pool_abort_metadata 2012-07-27 15:08:15 +01:00
dm-thin.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-uevent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-uevent.h
dm-verity.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-zero.c dm: zero silently drop discards 2010-08-12 04:14:12 +01:00
dm.c block: Add bio_clone_bioset(), bio_clone_kmalloc() 2012-09-09 10:35:39 +02:00
dm.h dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
faulty.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
Kconfig Additional md update for 3.6 2012-08-02 11:34:40 -07:00
linear.c md/linear: If md_integrity_register() fails, linear_run() must free the mem. 2012-04-02 09:48:37 +10:00
linear.h md/linear: typedef removal: linear_conf_t -> struct linear_conf 2011-10-11 16:48:54 +11:00
Makefile dm: add verity target 2012-03-28 18:43:38 +01:00
md.c block: Add bio_clone_bioset(), bio_clone_kmalloc() 2012-09-09 10:35:39 +02:00
md.h blk: pass from_schedule to non-request unplug functions. 2012-07-31 09:08:15 +02:00
multipath.c md: make 'name' arg to md_register_thread non-optional. 2012-07-03 15:56:52 +10:00
multipath.h md/multipath: typedef removal: multipath_conf_t -> struct mpconf 2011-10-11 16:48:57 +11:00
raid0.c block: Implement support for WRITE SAME 2012-09-20 14:31:45 +02:00
raid0.h md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00
raid1.c Additional md update for 3.6 2012-08-02 11:34:40 -07:00
raid1.h md/raid1: prevent merging too large request 2012-07-31 10:03:53 +10:00
raid5.c Additional md update for 3.6 2012-08-02 11:34:40 -07:00
raid5.h Additional md update for 3.6 2012-08-02 11:34:40 -07:00
raid10.c md/raid10: fix problem with on-stack allocation of r10bio structure. 2012-08-18 09:51:42 +10:00
raid10.h md/raid10: fix problem with on-stack allocation of r10bio structure. 2012-08-18 09:51:42 +10:00