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linux/drivers/md
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Christoph Hellwig 9966afaf91 dm: fix REQ_RAHEAD handling 
A few (but not all) dm targets use a special EWOULDBLOCK error code for
failing REQ_RAHEAD requests that fail due to a lack of available resources.
But no one else knows about this magic code, and lower level drivers also
don't generate it when failing read-ahead requests for similar reasons.

So remove this special casing and ignore all additional error handling for
REQ_RAHEAD - if this was a real underlying error we'd get a normal read
once the real read comes in.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-06-09 09:27:32 -06:00
..
bcache
drivers/md/bcache/super.c: use kvmalloc
2017-05-08 17:15:13 -07:00
persistent-data
dm space map disk: fix some book keeping in the disk space map
2017-05-15 15:09:50 -04:00
bitmap.c
md: fix several trivial typos in comments
2017-03-23 22:54:57 -07:00
bitmap.h
md: move bitmap_destroy to the beginning of __md_stop
2017-03-16 16:55:58 -07:00
dm-bio-prison-v1.c
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v1.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v2.c
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v2.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-record.h
…
dm-bufio.c
dm bufio: make the parameter "retain_bytes" unsigned long
2017-05-16 15:12:08 -04:00
dm-bufio.h
dm bufio: add sector start offset to dm-bufio interface
2017-03-07 13:28:33 -05:00
dm-builtin.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-cache-background-tracker.c
dm cache: handle kmalloc failure allocating background_tracker struct
2017-05-17 09:44:53 -04:00
dm-cache-background-tracker.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-block-types.h
linux: drop __bitwise__ everywhere
2016-12-16 00:13:41 +02:00
dm-cache-metadata.c
dm cache metadata: fail operations if fail_io mode has been established
2017-05-05 14:40:13 -04:00
dm-cache-metadata.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-internal.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-smq.c
dm cache policy smq: don't do any writebacks unless IDLE
2017-05-14 21:54:33 -04:00
dm-cache-policy.c
…
dm-cache-policy.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-target.c
dm cache: simplify the IDLE vs BUSY state calculation
2017-05-14 21:54:33 -04:00
dm-core.h
Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2017-05-05 18:49:20 -07:00
dm-crypt.c
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
dm-delay.c
dm: mark targets that pass integrity data
2017-04-24 12:04:32 -04:00
dm-era-target.c
dm block manager: remove an unused argument from dm_block_manager_create()
2017-04-27 17:08:41 -04:00
dm-exception-store.c
Merge tag 'dm-4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2015-11-04 21:19:53 -08:00
dm-exception-store.h
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-flakey.c
dm flakey: introduce "error_writes" feature
2016-12-13 15:01:31 -05:00
dm-integrity.c
dm integrity: use previously calculated log2 of sectors_per_block
2017-04-27 12:16:32 -04:00
dm-io.c
dm: support REQ_OP_WRITE_ZEROES
2017-04-08 11:25:38 -06:00
dm-ioctl.c
drivers/md/dm-ioctl.c: use kvmalloc rather than opencoded variant
2017-05-08 17:15:13 -07:00
dm-kcopyd.c
dm kcopyd: switch to use REQ_OP_WRITE_ZEROES
2017-04-08 11:25:38 -06:00
dm-linear.c
Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2017-05-05 18:49:20 -07:00
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
Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block
2016-10-07 14:42:05 -07:00
dm-log.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-mpath.c
dm mpath: multipath_clone_and_map must not return -EIO
2017-05-15 15:09:53 -04:00
dm-mpath.h
…
dm-path-selector.c
…
dm-path-selector.h
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-queue-length.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-raid1.c
dm: fix REQ_RAHEAD handling
2017-06-09 09:27:32 -06:00
dm-raid.c
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
dm-region-hash.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm-round-robin.c
dm round robin: revert "use percpu 'repeat_count' and 'current_path'"
2017-02-17 00:54:09 -05:00
dm-rq.c
dm rq: add a missing break to map_request
2017-05-15 15:09:51 -04:00
dm-rq.h
dm: always defer request allocation to the owner of the request_queue
2017-01-27 15:08:35 -07:00
dm-service-time.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-snap-persistent.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-snap-transient.c
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-snap.c
dm: teach dm-targets to use a dax_device + dax_operations
2017-04-25 13:20:36 -07:00
dm-stats.c
mm: introduce kv[mz]alloc helpers
2017-05-08 17:15:12 -07:00
dm-stats.h
…
dm-stripe.c
dm: fix REQ_RAHEAD handling
2017-06-09 09:27:32 -06:00
dm-switch.c
dm switch: simplify conditional in alloc_region_table()
2015-10-31 19:06:06 -04:00
dm-sysfs.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-table.c
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
dm-target.c
Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2017-05-05 18:49:20 -07:00
dm-thin-metadata.c
dm thin metadata: call precommit before saving the roots
2017-05-15 15:09:49 -04:00
dm-thin-metadata.h
dm thin: fix a race condition between discarding and provisioning a block
2016-07-20 12:43:35 -04:00
dm-thin.c
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
dm-uevent.c
…
dm-uevent.h
…
dm-verity-fec.c
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
dm-verity-fec.h
dm verity fec: limit error correction recursion
2017-03-16 09:37:31 -04:00
dm-verity-target.c
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-verity.h
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-zero.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm.c
Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2017-05-05 18:49:20 -07:00
dm.h
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
faulty.c
md: fast clone bio in bio_clone_mddev()
2017-02-15 11:24:54 -08:00
Kconfig
Merge tag 'for-4.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-05 19:31:06 -07:00
linear.c
Merge branch 'md-next' into md-linus
2017-05-01 14:09:21 -07:00
linear.h
md linear: fix a race between linear_add() and linear_congested()
2017-02-13 09:17:50 -08:00
Makefile
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
md-cluster.c
md-cluster: Fix a memleak in an error handling path
2017-04-14 08:08:29 -07:00
md-cluster.h
md-cluster: add the support for resize
2017-03-16 16:55:50 -07:00
md.c
md: don't return -EAGAIN in md_allow_write for external metadata arrays
2017-05-08 10:32:59 -07:00
md.h
md: don't return -EAGAIN in md_allow_write for external metadata arrays
2017-05-08 10:32:59 -07:00
multipath.c
md: support REQ_OP_WRITE_ZEROES
2017-04-08 11:25:38 -06:00
multipath.h
…
raid0.c
md/md0: optimize raid0 discard handling
2017-05-08 21:18:03 -07:00
raid0.h
block: kill merge_bvec_fn() completely
2015-08-13 12:31:57 -06:00
raid1.c
raid1: prefer disk without bad blocks
2017-05-12 14:41:15 -07:00
raid1.h
md/raid1: Use a new variable to count flighting sync requests
2017-04-27 14:01:16 -07:00
raid5-cache.c
md/r5cache: handle sync with data in write back cache
2017-05-11 22:14:40 -07:00
raid5-log.h
md/r5cache: gracefully handle journal device errors for writeback mode
2017-05-11 22:11:11 -07:00
raid5-ppl.c
raid5-ppl: use a single mempool for ppl_io_unit and header_page
2017-04-11 14:56:46 -07:00
raid5.c
md/r5cache: handle sync with data in write back cache
2017-05-11 22:14:40 -07:00
raid5.h
Merge tag 'for-4.12/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-05-03 10:31:20 -07:00
raid10.c
md/raid1/10: avoid unnecessary locking
2017-05-11 15:32:17 -07:00
raid10.h
md/raid10: simplify the splitting of requests.
2017-04-11 10:13:02 -07:00