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	Miscellaneous device-mapper fixes, cleanups and performance improvements.	2012-12-21 17:08:06 -08:00
Kconfig	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
Makefile	dm thin: move bio_prison code to separate module	2012-10-12 21:02:13 +01:00
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: preserve bi_io_vec when resubmitting bios	2009-04-02 19:55:23 +01:00
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 snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
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: userspace add luid to distinguish between concurrent log instances	2009-09-04 20:40:34 +01:00
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 mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-queue-length.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-raid.c	DM-RAID: Fix RAID10's check for sufficient redundancy	2013-01-24 12:02:36 +11:00
dm-raid1.c	dm: remove map_info	2012-12-21 20:23:41 +00:00
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	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
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
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
md.c	md: protect against crash upon fsync on ro array	2013-02-21 13:28:09 +11:00
md.h	md update for 3.8	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	md update for 3.8	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