Sebastian Riemer bbfa57c0f2 md: protect against crash upon fsync on ro array ...

If an fsync occurs on a read-only array, we need to send a
completion for the IO and may not increment the active IO count.
Otherwise, we hit a bug trace and can't stop the MD array anymore.

By advice of Christoph Hellwig we return success upon a flush
request but we return -EROFS for other writes.
We detect flush requests by checking if the bio has zero sectors.

This patch is suitable to any -stable kernel to which it applies.

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: NeilBrown <neilb@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: NeilBrown <neilb@suse.de>

2013-02-21 13:28:09 +11:00

..

persistent-data

Merge tag 'dm-3.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm

2012-12-21 17:08:06 -08:00

bitmap.c

md/bitmap:Don't use IS_ERR to judge alloc_page().

2012-10-11 13:45:36 +11:00

bitmap.h

md/bitmap: record the space available for the bitmap in the superblock.

2012-05-22 13:55:34 +10:00

dm-bio-prison.c

dm thin: replace dm_cell_release_singleton with cell_defer_except

2012-12-21 20:23:31 +00:00

dm-bio-prison.h

dm thin: replace dm_cell_release_singleton with cell_defer_except

2012-12-21 20:23:31 +00:00

dm-bio-record.h

…

dm-bufio.c

dm: use ACCESS_ONCE for sysfs values

2012-10-12 16:59:46 +01:00

dm-bufio.h

dm bufio: prefetch

2012-03-28 18:41:29 +01:00

dm-crypt.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-delay.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-exception-store.c

dm: replace simple_strtoul

2012-07-27 15:07:59 +01:00

dm-exception-store.h

…

dm-flakey.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-io.c

dm kcopyd: add WRITE SAME support to dm_kcopyd_zero

2012-12-21 20:23:37 +00:00

dm-ioctl.c

dm ioctl: use kmalloc if possible

2012-12-21 20:23:36 +00:00

dm-kcopyd.c

dm kcopyd: add WRITE SAME support to dm_kcopyd_zero

2012-12-21 20:23:37 +00:00

dm-linear.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-log-userspace-base.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

dm-log-userspace-transfer.c

connector/userns: replace netlink uses of cap_raised() with capable()

2012-05-10 23:21:39 -04:00

dm-log-userspace-transfer.h

…

dm-log.c

dm: use memweight()

2012-07-30 17:25:16 -07:00

dm-mpath.c

dm mpath: fix check for null mpio in end_io fn

2012-10-12 16:59:42 +01:00

dm-mpath.h

…

dm-path-selector.c

md: Add module.h to all files using it implicitly

2011-10-31 19:31:18 -04:00

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: remove map_info

2012-12-21 20:23:41 +00:00

dm-raid.c

DM-RAID: Fix RAID10's check for sufficient redundancy

2013-01-24 12:02:36 +11:00

dm-region-hash.c

dm raid1: fix crash with mirror recovery and discard

2012-07-20 14:25:03 +01:00

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

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-snap-transient.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-snap.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-stripe.c

dm stripe: add WRITE SAME support

2012-12-21 20:23:41 +00:00

dm-sysfs.c

…

dm-table.c

dm: introduce per_bio_data

2012-12-21 20:23:38 +00:00

dm-target.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-thin-metadata.c

dm persistent data: fix nested btree deletion

2012-12-21 20:23:32 +00:00

dm-thin-metadata.h

dm thin metadata: introduce dm_pool_abort_metadata

2012-07-27 15:08:15 +01:00

dm-thin.c

dm thin: fix queue limits stacking

2013-01-31 14:11:14 +00:00

dm-uevent.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-uevent.h

…

dm-verity.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm-zero.c

dm: remove map_info

2012-12-21 20:23:41 +00:00

dm.c

dm: fix write same requests counting

2013-01-31 14:23:36 +00:00

dm.h

dm: introduce per_bio_data

2012-12-21 20:23:38 +00:00

faulty.c

md faulty: use disk_stack_limits()

2012-10-22 10:44:55 +11:00

Kconfig

dm thin: move bio_prison code to separate module

2012-10-12 21:02:13 +01:00

linear.c

md: linear supports TRIM

2012-10-11 13:08:44 +11:00

linear.h

md/linear: typedef removal: linear_conf_t -> struct linear_conf

2011-10-11 16:48:54 +11:00

Makefile

dm thin: move bio_prison code to separate module

2012-10-12 21:02:13 +01:00

md.c

md: protect against crash upon fsync on ro array

2013-02-21 13:28:09 +11:00

md.h

Merge tag 'md-3.8' of git://neil.brown.name/md

2012-12-18 09:32:44 -08:00

multipath.c

MD: change the parameter of md thread

2012-10-11 13:34:00 +11:00

multipath.h

md/multipath: typedef removal: multipath_conf_t -> struct mpconf

2011-10-11 16:48:57 +11:00

raid0.c

md: raid 0 supports TRIM

2012-10-11 13:25:44 +11:00

raid0.h

md: add proper merge_bvec handling to RAID0 and Linear.

2012-03-19 12:46:39 +11:00

raid1.c

Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block

2012-12-17 13:39:11 -08:00

raid1.h

md/raid1: prevent merging too large request

2012-07-31 10:03:53 +10:00

raid5.c

Merge tag 'md-3.8' of git://neil.brown.name/md

2012-12-18 09:32:44 -08:00

raid5.h

MD: raid5 trim support

2012-10-11 13:49:05 +11:00

raid10.c

Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block

2012-12-17 13:39:11 -08:00

raid10.h

md/raid10: fix problem with on-stack allocation of r10bio structure.

2012-08-18 09:51:42 +10:00