NeilBrown d2eb35acfd md/raid1: avoid reading from known bad blocks. ... Now that we have a bad block list, we should not read from those blocks. There are several main parts to this: 1/ read_balance needs to check for bad blocks, and return not only the chosen device, but also how many good blocks are available there. 2/ fix_read_error needs to avoid trying to read from bad blocks. 3/ read submission must be ready to issue multiple reads to different devices as different bad blocks on different devices could mean that a single large read cannot be served by any one device, but can still be served by the array. This requires keeping count of the number of outstanding requests per bio. This count is stored in 'bi_phys_segments' 4/ retrying a read needs to also be ready to submit a smaller read and queue another request for the rest. This does not yet handle bad blocks when reading to perform resync, recovery, or check. 'md_trim_bio' will also be used for RAID10, so put it in md.c and export it. Signed-off-by: NeilBrown <neilb@suse.de>		2011-07-28 11:31:48 +10:00
..
Kconfig	dm: add flakey target	2011-03-24 13:54:24 +00:00
Makefile	dm: add flakey target	2011-03-24 13:54:24 +00:00
bitmap.c	MD bitmap: Revert DM dirty log hooks	2011-07-27 11:00:37 +10:00
bitmap.h	MD bitmap: Revert DM dirty log hooks	2011-07-27 11:00:37 +10:00
dm-bio-record.h	dm: preserve bi_io_vec when resubmitting bios	2009-04-02 19:55:23 +01:00
dm-crypt.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm	2011-03-25 20:51:44 -07:00
dm-delay.c	dm: convert workqueues to alloc_ordered	2011-01-13 19:59:57 +00:00
dm-exception-store.c	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-exception-store.h	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-flakey.c	dm: add flakey target	2011-03-24 13:54:24 +00:00
dm-io.c	dm io: use fixed initial mempool size	2011-05-29 13:03:09 +01:00
dm-ioctl.c	dm ioctl: add flag to wipe buffers for secure data	2011-03-24 13:54:30 +00:00
dm-kcopyd.c	dm kcopyd: return client directly and not through a pointer	2011-05-29 13:03:13 +01:00
dm-linear.c	dm: use dm_target_offset macro	2010-08-12 04:14:11 +01:00
dm-log-userspace-base.c	dm log userspace: add version number to comms	2011-01-13 19:59:52 +00:00
dm-log-userspace-transfer.c	netlink: kill eff_cap from struct netlink_skb_parms	2011-03-03 13:32:07 -08:00
dm-log-userspace-transfer.h	dm log: userspace add luid to distinguish between concurrent log instances	2009-09-04 20:40:34 +01:00
dm-log.c	dm io: use fixed initial mempool size	2011-05-29 13:03:09 +01:00
dm-mpath.c	dm mpath: do not fail paths after integrity errors	2011-05-29 13:02:55 +01:00
dm-mpath.h	dm mpath: remove is_active from struct dm_path	2008-10-10 13:36:58 +01:00
dm-path-selector.c	dm: path selector use module refcount directly	2009-04-02 19:55:27 +01:00
dm-path-selector.h	dm mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-queue-length.c	dm mpath: add queue length load balancer	2009-06-22 10:12:27 +01:00
dm-raid.c	md/dm - remove remains of plug_fn callback.	2011-04-18 18:25:41 +10:00
dm-raid1.c	dm kcopyd: return client directly and not through a pointer	2011-05-29 13:03:13 +01:00
dm-region-hash.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
dm-round-robin.c	dm mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-service-time.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
dm-snap-persistent.c	dm io: use fixed initial mempool size	2011-05-29 13:03:09 +01:00
dm-snap-transient.c	dm snapshot: move cow ref from exception store to snap core	2009-12-10 23:52:12 +00:00
dm-snap.c	dm kcopyd: return client directly and not through a pointer	2011-05-29 13:03:13 +01:00
dm-stripe.c	dm stripe: implement merge method	2011-03-24 13:54:35 +00:00
dm-sysfs.c	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
dm-table.c	dm table: reject devices without request fns	2011-05-29 13:02:52 +01:00
dm-target.c	dm: error return error for discards	2010-08-12 04:14:14 +01:00
dm-uevent.c	dm table: remove dm_get from dm_table_get_md	2010-03-06 02:29:52 +00:00
dm-uevent.h	dm: uevent generate events	2007-10-20 02:01:26 +01:00
dm-zero.c	dm: zero silently drop discards	2010-08-12 04:14:12 +01:00
dm.c	block: fix non-atomic access to genhd inflight structures	2011-03-22 08:35:35 +01:00
dm.h	block: Require subsystems to explicitly allocate bio_set integrity mempool	2011-03-17 11:11:05 +01:00
faulty.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
linear.c	block: Require subsystems to explicitly allocate bio_set integrity mempool	2011-03-17 11:11:05 +01:00
linear.h	md/linear: use call_rcu to free obsolete 'conf' structures.	2009-06-18 08:49:42 +10:00
md.c	md/raid1: avoid reading from known bad blocks.	2011-07-28 11:31:48 +10:00
md.h	md/raid1: avoid reading from known bad blocks.	2011-07-28 11:31:48 +10:00
multipath.c	md: make error_handler functions more uniform and correct.	2011-05-11 14:38:44 +10:00
multipath.h	md/multipath: discard ->working_disks in favour of ->degraded	2011-05-11 14:38:02 +10:00
raid0.c	block: Require subsystems to explicitly allocate bio_set integrity mempool	2011-03-17 11:11:05 +01:00
raid0.h	md: fix handling of array level takeover that re-arranges devices.	2010-06-24 13:33:24 +10:00
raid1.c	md/raid1: avoid reading from known bad blocks.	2011-07-28 11:31:48 +10:00
raid1.h	md/raid1: avoid reading from known bad blocks.	2011-07-28 11:31:48 +10:00
raid5.c	md: don't allow arrays to contain devices with bad blocks.	2011-07-28 11:31:47 +10:00
raid5.h	md/raid5: add some more fields to stripe_head_state	2011-07-26 11:35:20 +10:00
raid10.c	md: don't allow arrays to contain devices with bad blocks.	2011-07-28 11:31:47 +10:00
raid10.h	md/raid10: Make use of new recovery_disabled handling	2011-07-27 11:00:36 +10:00