Mikulas Patocka 650d2a06b4 dm thin: do not send discards to shared blocks ... When process_discard receives a partial discard that doesn't cover a full block, it sends this discard down to that block. Unfortunately, the block can be shared and the discard would corrupt the other snapshots sharing this block. This patch detects block sharing and ends the discard with success when sending it to the shared block. The above change means that if the device supports discard it can't be guaranteed that a discard request zeroes data. Therefore, we set ti->discard_zeroes_data_unsupported. Thin target discard support with this bug arrived in commit 104655fd4d (dm thin: support discards). Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@kernel.org Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>		2012-07-20 14:25:05 +01:00
..
persistent-data	dm persistent data: fix allocation failure in space map checker init	2012-07-03 12:55:37 +01:00
bitmap.c	md/bitmap: record the space available for the bitmap in the superblock.	2012-05-22 13:55:34 +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	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-delay.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-exception-store.c	dm exception store: fix init error path	2012-03-28 18:41:22 +01:00
dm-exception-store.h
dm-flakey.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-io.c	dm io: fix discard support	2012-03-07 19:09:37 +00:00
dm-ioctl.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-kcopyd.c
dm-linear.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +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: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-mpath.c	dm mpath: allow ioctls to trigger pg init	2012-06-03 00:29:58 +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-raid.c	DM RAID: Use md_error() in place of simply setting Faulty bit	2012-05-22 13:55:31 +10:00
dm-raid1.c	dm raid1: fix crash with mirror recovery and discard	2012-07-20 14:25:03 +01:00
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-stripe.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-sysfs.c
dm-table.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-target.c
dm-thin-metadata.c	dm thin: provide userspace access to pool metadata	2012-06-03 00:30:01 +01:00
dm-thin-metadata.h	dm thin: provide userspace access to pool metadata	2012-06-03 00:30:01 +01:00
dm-thin.c	dm thin: do not send discards to shared blocks	2012-07-20 14:25:05 +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: add verity target	2012-03-28 18:43:38 +01:00
dm-zero.c
dm.c	dm: clear bi_end_io on remapping failure	2012-03-28 18:41:25 +01:00
dm.h	dm table: add immutable feature	2011-10-31 20:19:04 +00:00
faulty.c	md: tidy up rdev_for_each usage.	2012-03-19 12:46:39 +11:00
Kconfig	dm: add verity target	2012-03-28 18:43:38 +01:00
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
Makefile	dm: add verity target	2012-03-28 18:43:38 +01:00
md.c	md: support re-add of recovering devices.	2012-07-03 15:59:06 +10:00
md.h	md/bitmap: add new 'space' attribute for bitmaps.	2012-05-22 13:55:07 +10:00
multipath.c	md: make 'name' arg to md_register_thread non-optional.	2012-07-03 15:56:52 +10:00
multipath.h
raid0.c	md: Avoid OOPS when reshaping raid1 to raid0	2012-04-03 15:37:26 +10:00
raid0.h	md: add proper merge_bvec handling to RAID0 and Linear.	2012-03-19 12:46:39 +11:00
raid1.c	md/raid1: fix use-after-free bug in RAID1 data-check code.	2012-07-09 11:34:13 +10:00
raid1.h	md/raid1: Allocate spare to store replacement devices and their bios.	2011-12-23 10:17:56 +11:00
raid5.c	md: fix up plugging (again).	2012-07-03 17:45:31 +10:00
raid5.h	raid5: support sync request	2012-05-22 13:55:05 +10:00
raid10.c	md/raid10: fix careless build error	2012-07-04 09:35:35 +10:00
raid10.h	md/raid10: add reshape support	2012-05-22 13:53:47 +10:00