NeilBrown e7c0c3fa29 md/raid10: close race that lose writes lost when replacement completes. ... When a replacement operation completes there is a small window when the original device is marked 'faulty' and the replacement still looks like a replacement. The faulty should be removed and the replacement moved in place very quickly, bit it isn't instant. So the code write out to the array must handle the possibility that the only working device for some slot in the replacement - but it doesn't. If the primary device is faulty it just gives up. This can lead to corruption. So make the code more robust: if either the primary or the replacement is present and working, write to them. Only when neither are present do we give up. This bug has been present since replacement was introduced in 3.3, so it is suitable for any -stable kernel since then. Reported-by: "George Spelvin" <linux@horizon.com> Cc: stable@vger.kernel.org Signed-off-by: NeilBrown <neilb@suse.de>		2012-11-22 15:12:36 +11:00
..
persistent-data	dm persistent data: convert to use le32_add_cpu	2012-10-12 16:59:47 +01:00
bitmap.c	md/bitmap:Don't use IS_ERR to judge alloc_page().	2012-10-11 13:45:36 +11:00
bitmap.h
dm-bio-prison.c	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
dm-bio-prison.h	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
dm-bio-record.h
dm-bufio.c	dm: use ACCESS_ONCE for sysfs values	2012-10-12 16:59:46 +01:00
dm-bufio.h
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-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-linear.c	dm thin: commit before gathering status	2012-07-27 15:08:16 +01:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log.c	dm: use memweight()	2012-07-30 17:25:16 -07:00
dm-mpath.c	dm mpath: fix check for null mpio in end_io fn	2012-10-12 16:59:42 +01:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid1.c	workqueue: deprecate flush[_delayed]_work_sync()	2012-08-20 14:51:24 -07:00
dm-raid.c	DM RAID: Fix for "sync" directive ineffectiveness	2012-10-11 13:42:19 +11:00
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-service-time.c
dm-snap-persistent.c
dm-snap-transient.c
dm-snap.c	dm thin: commit before gathering status	2012-07-27 15:08:16 +01:00
dm-stripe.c	workqueue: deprecate flush[_delayed]_work_sync()	2012-08-20 14:51:24 -07:00
dm-sysfs.c
dm-table.c	dm: retain table limits when swapping to new table with no devices	2012-09-26 23:45:45 +01:00
dm-target.c
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: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
dm-uevent.c
dm-uevent.h
dm-verity.c	dm: use ACCESS_ONCE for sysfs values	2012-10-12 16:59:46 +01:00
dm-zero.c
dm.c	dm: store dm_target_io in bio front_pad	2012-10-12 21:02:15 +01:00
dm.h	dm: retain table limits when swapping to new table with no devices	2012-09-26 23:45:45 +01:00
faulty.c	md faulty: use disk_stack_limits()	2012-10-22 10:44:55 +11:00
Kconfig	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
linear.c	md: linear supports TRIM	2012-10-11 13:08:44 +11:00
linear.h
Makefile	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
md.c	md: make sure everything is freed when dm-raid stops an array.	2012-11-20 10:27:37 +11:00
md.h	Subject: [PATCH] md:change resync_mismatches to atomic64_t to avoid races	2012-10-11 14:17:59 +11:00
multipath.c	MD: change the parameter of md thread	2012-10-11 13:34:00 +11:00
multipath.h
raid0.c	md: raid 0 supports TRIM	2012-10-11 13:25:44 +11:00
raid0.h
raid1.c	md/raid1: Fix assembling of arrays containing Replacements.	2012-10-31 11:42:03 +11:00
raid1.h	md/raid1: prevent merging too large request	2012-07-31 10:03:53 +10:00
raid5.c	md/raid5: Make sure we clear R5_Discard when discard is finished.	2012-11-22 09:14:13 +11:00
raid5.h	MD: raid5 trim support	2012-10-11 13:49:05 +11:00
raid10.c	md/raid10: close race that lose writes lost when replacement completes.	2012-11-22 15:12:36 +11:00
raid10.h	md/raid10: fix problem with on-stack allocation of r10bio structure.	2012-08-18 09:51:42 +10:00