NeilBrown 109e376530 md: add block tracing for bio_remapping ... The block tracing infrastructure (accessed with blktrace/blkparse) supports the tracing of mapping bios from one device to another. This is currently used when a bio in a partition is mapped to the whole device, when bios are mapped by dm, and for mapping in md/raid5. Other md personalities do not include this tracing yet, so add it. When a read-error is detected we redirect the request to a different device. This could justifiably be seen as a new mapping for the originial bio, or a secondary mapping for the bio that errors. This patch uses the second option. When md is used under dm-raid, the mappings are not traced as we do not have access to the block device number of the parent. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>		2016-11-18 09:32:50 -08:00
..
bcache	block: export bio_free_pages to other modules	2016-09-22 07:48:03 -06:00
persistent-data	dm array: introduce cursor api	2016-09-22 11:15:04 -04:00
bitmap.c	md/bitmap: Don't write bitmap while earlier writes might be in-flight	2016-11-07 15:08:23 -08:00
bitmap.h	md-cluster: sync bitmap when node received RESYNCING msg	2016-05-04 12:39:35 -07:00
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	. various fixes and cleanups for request-based DM core	2016-10-09 17:16:18 -07:00
dm-bufio.h
dm-builtin.c	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
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 metadata: switch to using the new cursor api for loading metadata	2016-09-22 11:15:05 -04:00
dm-cache-metadata.h	dm cache: make sure every metadata function checks fail_io	2016-03-10 17:12:12 -05:00
dm-cache-policy-cleaner.c	dm cache: speed up writing of the hint array	2016-09-22 11:15:02 -04:00
dm-cache-policy-internal.h	dm cache: speed up writing of the hint array	2016-09-22 11:15:02 -04:00
dm-cache-policy-smq.c	dm cache policy smq: distribute entries to random levels when switching to smq	2016-09-22 11:15:03 -04:00
dm-cache-policy.c
dm-cache-policy.h	dm cache: speed up writing of the hint array	2016-09-22 11:15:02 -04:00
dm-cache-target.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm-core.h	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
dm-crypt.c	. various fixes and cleanups for request-based DM core	2016-10-09 17:16:18 -07:00
dm-delay.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-era-target.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
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	2016-01-08 20:03:05 -05:00
dm-flakey.c	dm flakey: fix reads to be issued if drop_writes configured	2016-08-24 21:55:05 -04:00
dm-io.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm-ioctl.c	dm: allow bio-based table to be upgraded to bio-based with DAX support	2016-07-20 23:49:52 -04:00
dm-kcopyd.c	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
dm-linear.c	libnvdimm for 4.8	2016-07-28 17:38:16 -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: match wait_for_completion_timeout return type	2015-04-15 12:10:20 -04:00
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	dm log: fix unitialized bio operation flags	2016-08-24 21:55:05 -04:00
dm-mpath.c	dm mpath: always return reservation conflict without failing over	2016-09-29 10:57:07 -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 mirror: use all available legs on multiple failures	2016-10-14 11:55:17 -04:00
dm-raid.c	dm raid: fix activation of existing raid4/10 devices	2016-10-17 16:41:31 -04:00
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: do not use this_cpu_ptr() without having preemption disabled	2016-08-15 09:23:14 -04:00
dm-rq.c	- A couple DM raid and DM mirror fixes	2016-10-28 09:27:58 -07:00
dm-rq.h	dm rq: introduce dm_mq_kick_requeue_list()	2016-09-15 11:16:05 -04:00
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	dm: use bio op accessors	2016-06-07 13:41:38 -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	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm-stats.c	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
dm-stats.h	dm stats: support precise timestamps	2015-06-17 12:40:40 -04:00
dm-stripe.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -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	dm table: fix missing dm_put_target_type() in dm_table_add_target()	2016-10-24 11:17:46 -04:00
dm-target.c	libnvdimm for 4.8	2016-07-28 17:38:16 -07:00
dm-thin-metadata.c	dm thin: fix a race condition between discarding and provisioning a block	2016-07-20 12:43:35 -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	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm verity fec: fix block calculation	2016-07-01 23:29:08 -04:00
dm-verity-fec.h	dm verity: add support for forward error correction	2015-12-10 10:39:03 -05:00
dm-verity-target.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-verity.h	dm verity: add ignore_zero_blocks feature	2015-12-10 10:39:03 -05:00
dm-zero.c	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
dm.c	- A couple DM raid and DM mirror fixes	2016-10-28 09:27:58 -07:00
dm.h	dm: add infrastructure for DAX support	2016-07-20 23:49:49 -04:00
faulty.c	MD: rename some functions	2016-01-20 13:52:20 -08:00
Kconfig	dm: add missing newline between DM_DEBUG_BLOCK_STACK_TRACING and DM_BUFIO	2016-03-10 17:12:11 -05:00
linear.c	md: add block tracing for bio_remapping	2016-11-18 09:32:50 -08:00
linear.h
Makefile	dm: move request-based code out to dm-rq.[hc]	2016-06-10 15:15:44 -04:00
md-cluster.c	md-cluster: make resync lock also could be interruptted	2016-09-21 09:09:44 -07:00
md-cluster.h	md-cluster: gather resync infos and enable recv_thread after bitmap is ready	2016-05-09 09:24:03 -07:00
md.c	md: remove md_super_wait() call after bitmap_flush()	2016-11-09 17:14:28 -08:00
md.h	md: define mddev flags, recovery flags and r1bio state bits using enums	2016-11-09 12:53:52 -08:00
multipath.c	md/multipath: replace printk() with pr_*()	2016-11-07 15:08:22 -08:00
multipath.h
raid0.c	md: add block tracing for bio_remapping	2016-11-18 09:32:50 -08:00
raid0.h	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
raid1.c	md: add block tracing for bio_remapping	2016-11-18 09:32:50 -08:00
raid1.h	md: define mddev flags, recovery flags and r1bio state bits using enums	2016-11-09 12:53:52 -08:00
raid5-cache.c	raid5-cache: fix lockdep warning	2016-11-17 11:30:27 -08:00
raid5.c	md/raid5: change printk() to pr_*()	2016-11-07 15:08:22 -08:00
raid5.h	md/raid5: Convert to hotplug state machine	2016-09-06 18:30:23 +02:00
raid10.c	md: add block tracing for bio_remapping	2016-11-18 09:32:50 -08:00
raid10.h	raid10: improve random reads performance	2016-07-19 15:20:28 -07:00