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NeilBrown 24bc48af0a raid5: Set R5_Expanded on parity devices as well as data. 
[ Upstream commit 235b6003fb ]

When reshaping a fully degraded raid5/raid6 to a larger
nubmer of devices, the new device(s) are not in-sync
and so that can make the newly grown stripe appear to be
"failed".
To avoid this, we set the R5_Expanded flag to say "Even though
this device is not fully in-sync, this block is safe so
don't treat the device as failed for this stripe".
This flag is set for data devices, not not for parity devices.

Consequently, if you have a RAID6 with two devices that are partly
recovered and a spare, and start a reshape to include the spare,
then when the reshape gets past the point where the recovery was
up to, it will think the stripes are failed and will get into
an infinite loop, failing to make progress.

So when contructing parity on an EXPAND_READY stripe,
set R5_Expanded.

Reported-by: Curt <lightspd@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-20 10:05:00 +01:00
..
bcache bcache: fix wrong cache_misses statistics 2017-12-20 10:04:59 +01:00
persistent-data dm space map disk: fix some book keeping in the disk space map 2017-05-25 14:30:08 +02:00
bitmap.c md/bitmap: disable bitmap_resize for file-backed bitmaps. 2017-09-27 11:00:14 +02:00
bitmap.h md-cluster: Use a small window for resync 2015-10-12 01:32:05 -05:00
dm-bio-prison.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
dm-bio-prison.h dm bio prison: add dm_cell_promote_or_release() 2015-05-29 14:19:06 -04:00
dm-bio-record.h
dm-bufio.c dm bufio: fix integer overflow when limiting maximum cache size 2017-11-30 08:37:20 +00:00
dm-bufio.h
dm-builtin.c
dm-cache-block-types.h
dm-cache-metadata.c dm cache metadata: fail operations if fail_io mode has been established 2017-05-25 14:30:08 +02:00
dm-cache-metadata.h dm cache: make sure every metadata function checks fail_io 2016-04-12 09:08:40 -07:00
dm-cache-policy-cleaner.c - Revert a dm-multipath change that caused a regression for unprivledged 2015-11-04 21:19:53 -08:00
dm-cache-policy-internal.h dm cache: age and write back cache entries even without active IO 2015-06-11 17:13:01 -04:00
dm-cache-policy-mq.c dm: convert ffs to __ffs 2015-10-31 19:06:01 -04:00
dm-cache-policy-smq.c dm: convert ffs to __ffs 2015-10-31 19:06:01 -04:00
dm-cache-policy.c
dm-cache-policy.h dm cache: age and write back cache entries even without active IO 2015-06-11 17:13:01 -04:00
dm-cache-target.c dm cache: fix corruption seen when using cache > 2TB 2017-03-12 06:37:26 +01:00
dm-crypt.c dm crypt: mark key as invalid until properly loaded 2017-01-06 11:16:15 +01:00
dm-delay.c dm delay: document that offsets are specified in sectors 2015-10-31 19:06:05 -04:00
dm-era-target.c dm era: save spacemap metadata root after the pre-commit 2017-05-20 14:27:00 +02:00
dm-exception-store.c - Revert a dm-multipath change that caused a regression for unprivledged 2015-11-04 21:19:53 -08:00
dm-exception-store.h dm snapshot: fix hung bios when copy error occurs 2016-03-03 15:07:14 -08:00
dm-flakey.c dm flakey: return -EINVAL on interval bounds error in flakey_ctr() 2017-01-06 11:16:15 +01:00
dm-io.c dm: drop NULL test before kmem_cache_destroy() and mempool_destroy() 2015-10-31 19:06:00 -04:00
dm-ioctl.c dm ioctl: prevent stack leak in dm ioctl call 2017-05-08 07:46:02 +02:00
dm-kcopyd.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
dm-linear.c dm linear: remove redundant target name from error messages 2015-10-31 19:06:03 -04:00
dm-log-userspace-base.c dm: drop NULL test before kmem_cache_destroy() and mempool_destroy() 2015-10-31 19:06:00 -04:00
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c dm log writes: fix bug with too large bios 2016-10-07 15:23:47 +02:00
dm-log.c
dm-mpath.c dm mpath: check if path's request_queue is dying in activate_path() 2016-10-28 03:01:28 -04:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid.c dm raid: fix round up of default region size 2015-10-02 12:02:31 -04:00
dm-raid1.c dm mirror: fix read error on recovery after default leg failure 2016-11-10 16:36:35 +01:00
dm-region-hash.c dm: convert ffs to __ffs 2015-10-31 19:06:01 -04:00
dm-round-robin.c
dm-service-time.c
dm-snap-persistent.c dm snapshot: fix hung bios when copy error occurs 2016-03-03 15:07:14 -08:00
dm-snap-transient.c dm snapshot: fix hung bios when copy error occurs 2016-03-03 15:07:14 -08:00
dm-snap.c dm snapshot: disallow the COW and origin devices from being identical 2016-04-12 09:08:39 -07:00
dm-stats.c dm stats: fix a leaked s->histogram_boundaries array 2017-03-12 06:37:26 +01:00
dm-stats.h dm stats: support precise timestamps 2015-06-17 12:40:40 -04:00
dm-stripe.c Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm 2015-09-02 16:35:26 -07:00
dm-switch.c dm switch: simplify conditional in alloc_region_table() 2015-10-31 19:06:06 -04:00
dm-sysfs.c
dm-table.c dm snapshot: disallow the COW and origin devices from being identical 2016-04-12 09:08:39 -07:00
dm-target.c
dm-thin-metadata.c dm thin metadata: call precommit before saving the roots 2017-05-25 14:30:08 +02:00
dm-thin-metadata.h dm thin metadata: add dm_thin_remove_range() 2015-06-11 17:13:04 -04:00
dm-thin.c dm thin: fix race condition when destroying thin pool workqueue 2016-03-03 15:07:10 -08:00
dm-uevent.c
dm-uevent.h
dm-verity.c dm: refactor ioctl handling 2015-10-31 19:05:59 -04:00
dm-zero.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
dm.c dm: fix race between dm_get_from_kobject() and __dm_destroy() 2017-11-30 08:37:20 +00:00
dm.h block: kill merge_bvec_fn() completely 2015-08-13 12:31:57 -06:00
faulty.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
Kconfig dm raid: select the Kconfig option CONFIG_MD_RAID0 2017-05-25 14:30:07 +02:00
linear.c md/linear: shutup lockdep warnning 2017-10-21 17:09:05 +02:00
linear.h md linear: fix a race between linear_add() and linear_congested() 2017-03-12 06:37:30 +01:00
Makefile raid5: add basic stripe log 2015-10-24 17:16:19 +11:00
md-cluster.c md-cluster: free md_cluster_info if node leave cluster 2017-12-20 10:04:52 +01:00
md-cluster.h md-cluster: Fix adding of new disk with new reload code 2015-10-12 03:35:30 -05:00
md.c md: fix super_offset endianness in super_1_rdev_size_change 2017-07-15 11:57:49 +02:00
md.h md/raid: only permit hot-add of compatible integrity profiles 2016-02-17 12:30:57 -08:00
multipath.c md: multipath: don't hardcopy bio in .make_request path 2016-04-12 09:08:57 -07:00
multipath.h
raid0.c md/raid0: apply base queue limits *before* disk_stack_limits 2015-10-02 17:23:44 +10:00
raid0.h block: kill merge_bvec_fn() completely 2015-08-13 12:31:57 -06:00
raid1.c md: don't use flush_signals in userspace processes 2017-07-27 15:06:06 -07:00
raid1.h md-cluster: Use a small window for resync 2015-10-12 01:32:05 -05:00
raid5-cache.c raid5-cache: start raid5 readonly if journal is missing 2015-11-01 13:48:29 +11:00
raid5.c raid5: Set R5_Expanded on parity devices as well as data. 2017-12-20 10:05:00 +01:00
raid5.h RAID5: revert e9e4c377e2 to fix a livelock 2016-04-12 09:08:57 -07:00
raid10.c md/raid10: submit bio directly to replacement disk 2017-10-08 10:14:20 +02:00
raid10.h md/raid10: ensure device failure recorded before write request returns. 2015-08-31 19:43:45 +02:00