Mikulas Patocka 76c44f6d80 dm snapshot: don't invalidate on-disk image on snapshot write overflow ... When the snapshot overflows because of a write to the origin, the on-disk image has to be invalidated. However, when the snapshot overflows because of a write to the snapshot, the on-disk image doesn't have to be invalidated. Change the behavior so that the on-disk image is not invalidated in this case. When the snapshot overflows, the variable snapshot_overflowed is set. All writes to the snapshot are disallowed to minimize filesystem corruption - this condition is cleared when the snapshot is deactivated and activated. The user can extend the overflowed snapshot, deactivate and activate it again, run fsck (if journaling filesystem is not used) mount it and recover the data. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>		2015-08-12 16:22:55 -04:00
..
bcache	bcache: don't embed 'return' statements in closure macros	2015-07-11 09:57:32 -06:00
persistent-data	dm: remove unlikely() before IS_ERR()	2015-08-12 11:32:21 -04:00
bitmap.c	Some md fixes for 4.2	2015-07-25 11:24:58 -07:00
bitmap.h	md-cluster: re-add capabilities	2015-04-22 07:59:39 +10:00
dm-bio-prison.c	dm bio prison: add dm_cell_promote_or_release()	2015-05-29 14:19:06 -04:00
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: Refactor for new bio cloning/splitting	2013-11-23 22:33:55 -08:00
dm-bufio.c	dm bufio: fix time comparison to use time_after_eq()	2015-02-09 13:06:48 -05:00
dm-bufio.h	dm snapshot: use dm-bufio prefetch	2014-01-14 23:23:03 -05:00
dm-builtin.c	dm sysfs: fix a module unload race	2014-01-14 23:23:04 -05:00
dm-cache-block-types.h	dm cache: revert "remove remainder of distinct discard block size"	2014-11-10 15:25:30 -05:00
dm-cache-metadata.c	dm cache: add fail io mode and needs_check flag	2015-06-11 17:13:00 -04:00
dm-cache-metadata.h	dm cache: add fail io mode and needs_check flag	2015-06-11 17:13:00 -04:00
dm-cache-policy-cleaner.c	dm cache: pass a new 'critical' flag to the policies when requesting writeback work	2015-05-29 14:19:04 -04:00
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 cache policy smq: move 'dm-cache-default' module alias to SMQ	2015-08-12 11:27:29 -04:00
dm-cache-policy-smq.c	dm cache policy smq: change the mutex to a spinlock	2015-08-12 11:32:19 -04:00
dm-cache-policy.c	dm cache: add policy name to status output	2014-01-16 13:44:11 -05:00
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: move wake_waker() from free_migrations() to where it is needed	2015-08-12 11:32:20 -04:00
dm-crypt.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-delay.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-era-target.c	dm era: check for a non-NULL metadata object before closing it	2014-06-03 13:44:08 -04:00
dm-exception-store.c	dm: replace simple_strtoul	2012-07-27 15:07:59 +01:00
dm-exception-store.h
dm-flakey.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-io.c	dm io: deal with wandering queue limits when handling REQ_DISCARD and REQ_WRITE_SAME	2015-02-27 14:53:32 -05:00
dm-ioctl.c	dm: only initialize the request_queue once	2015-04-30 10:25:21 -04:00
dm-kcopyd.c	dm: stop using WQ_NON_REENTRANT	2013-08-23 09:02:13 -04:00
dm-linear.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-log-userspace-base.c	dm log userspace base: fix compile warning	2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.c	dm log userspace transfer: match wait_for_completion_timeout return type	2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
dm-log-writes.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-log.c	dm: use memweight()	2012-07-30 17:25:16 -07:00
dm-mpath.c	dm mpath: fix leak of dm_mpath_io structure in blk-mq .queue_rq error path	2015-05-27 17:37:22 -04:00
dm-mpath.h
dm-path-selector.c
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: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-raid.c	dm raid: add support for the MD RAID0 personality	2015-05-29 14:19:00 -04:00
dm-region-hash.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
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	dm: remove unlikely() before IS_ERR()	2015-08-12 11:32:21 -04:00
dm-snap-transient.c
dm-snap.c	dm snapshot: don't invalidate on-disk image on snapshot write overflow	2015-08-12 16:22:55 -04:00
dm-stats.c	dm stats: add support for request-based DM devices	2015-06-17 12:40:41 -04:00
dm-stats.h	dm stats: support precise timestamps	2015-06-17 12:40:40 -04:00
dm-stripe.c	dm: do not override error code returned from dm_get_device()	2015-08-12 11:32:21 -04:00
dm-switch.c	dm switch: efficiently support repetitive patterns	2014-08-01 12:30:37 -04:00
dm-sysfs.c	dm: add 'use_blk_mq' module param and expose in per-device ro sysfs attr	2015-04-15 12:10:17 -04:00
dm-table.c	Revert "block, dm: don't copy bios for request clones"	2015-06-26 10:11:58 -04:00
dm-target.c	dm: allocate requests in target when stacking on blk-mq devices	2015-02-09 13:06:47 -05:00
dm-thin-metadata.c	dm thin metadata: delete btrees when releasing metadata snapshot	2015-08-12 10:42:51 -04:00
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: return -ENOSPC when erroring retry list due to out of data space	2015-07-26 17:39:19 -04:00
dm-uevent.c
dm-uevent.h
dm-verity.c	dm: remove unlikely() before IS_ERR()	2015-08-12 11:32:21 -04:00
dm-zero.c	dm crypt, dm zero: update author name following legal name change	2014-07-10 16:44:14 -04:00
dm.c	dm: test return value for DM_MAPIO_SUBMITTED	2015-08-12 11:32:20 -04:00
dm.h	- Revert block and DM core changes the removed request-based DM's	2015-06-26 12:35:01 -07:00
faulty.c	md: rename ->stop to ->free	2015-02-04 08:35:52 +11:00
Kconfig	dm crypt: update wiki page URL	2015-07-27 07:58:16 -04:00
linear.c	md: rename ->stop to ->free	2015-02-04 08:35:52 +11:00
linear.h
Makefile	dm cache: add stochastic-multi-queue (smq) policy	2015-06-11 17:12:59 -04:00
md-cluster.c	Fix read-balancing during node failure	2015-07-24 13:37:59 +10:00
md-cluster.h	Fix read-balancing during node failure	2015-07-24 13:37:59 +10:00
md.c	md: use kzalloc() when bitmap is disabled	2015-08-03 14:56:02 +10:00
md.h	writeback: separate out include/linux/backing-dev-defs.h	2015-06-02 08:33:34 -06:00
multipath.c	md: rename ->stop to ->free	2015-02-04 08:35:52 +11:00
multipath.h
raid0.c	md/raid0: fix restore to sector variable in raid0_make_request	2015-05-21 09:14:25 +10:00
raid0.h
raid1.c	md/raid1: extend spinlock to protect raid1_end_read_request against inconsistencies	2015-08-03 12:29:42 +10:00
raid1.h	md: make ->congested robust against personality changes.	2015-02-04 08:35:52 +11:00
raid5.c	md/raid5: don't let shrink_slab shrink too far.	2015-08-03 17:10:56 +10:00
raid5.h	md/raid5: avoid races when changing cache size.	2015-07-22 14:04:15 +10:00
raid10.c	md/raid10: always set reshape_safe when initializing reshape_position.	2015-07-22 14:08:24 +10:00
raid10.h	md: make ->congested robust against personality changes.	2015-02-04 08:35:52 +11:00