Mike Snitzer a5664dad7e dm ioctl: make bio or request based device type immutable ... Determine whether a mapped device is bio-based or request-based when loading its first (inactive) table and don't allow that to be changed later. This patch performs different device initialisation in each of the two cases. (We don't think it's necessary to add code to support changing between the two types.) Allowed md->type transitions: DM_TYPE_NONE to DM_TYPE_BIO_BASED DM_TYPE_NONE to DM_TYPE_REQUEST_BASED We now prevent table_load from replacing the inactive table with a conflicting type of table even after an explicit table_clear. Introduce 'type_lock' into the struct mapped_device to protect md->type and to prepare for the next patch that will change the queue initialization and allocate memory while md->type_lock is held. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> drivers/md/dm-ioctl.c | 15 +++++++++++++++ drivers/md/dm.c | 37 ++++++++++++++++++++++++++++++------- drivers/md/dm.h | 5 +++++ include/linux/dm-ioctl.h | 4 ++-- 4 files changed, 52 insertions(+), 9 deletions(-)		2010-08-12 04:14:01 +01:00
..
.gitignore	gitignore: misc files	2006-01-01 22:21:50 +01:00
bitmap.c	md/bitmap: separate out loading a bitmap from initialising the structures.	2010-07-26 13:21:34 +10:00
bitmap.h	md/bitmap: separate out loading a bitmap from initialising the structures.	2010-07-26 13:21:34 +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	dm crypt: use kstrdup	2010-08-12 04:13:58 +01:00
dm-delay.c	dm table: remove unused dm_get_device range parameters	2010-03-06 02:32:27 +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-io.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
dm-ioctl.c	dm ioctl: make bio or request based device type immutable	2010-08-12 04:14:01 +01:00
dm-kcopyd.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
dm-linear.c	dm table: remove unused dm_get_device range parameters	2010-03-06 02:32:27 +00:00
dm-log-userspace-base.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-log-userspace-transfer.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-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 table: remove unused dm_get_device range parameters	2010-03-06 02:32:27 +00:00
dm-mpath.c	dm mpath: fix NULL pointer dereference when path parameters missing	2010-08-12 04:13:49 +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-raid1.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
dm-region-hash.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-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 snapshot: persistent use define for disk header chunk size	2010-08-12 04:13:59 +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 snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-stripe.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
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: remove unused dm_get_device range parameters	2010-03-06 02:32:27 +00:00
dm-target.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-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: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
dm.c	dm ioctl: make bio or request based device type immutable	2010-08-12 04:14:01 +01:00
dm.h	dm ioctl: make bio or request based device type immutable	2010-08-12 04:14:01 +01:00
faulty.c	Merge commit '3ff195b011d7decf501a4d55aeed312731094796' into for-linus	2010-05-22 08:31:36 +10:00
Kconfig	Merge branch 'async' of macbook:git/btrfs-unstable	2010-08-09 10:36:44 +01:00
linear.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
linear.h	md/linear: use call_rcu to free obsolete 'conf' structures.	2009-06-18 08:49:42 +10:00
Makefile	Merge branch 'async' of macbook:git/btrfs-unstable	2010-08-09 10:36:44 +01:00
md.c	Merge branch 'for-linus' of git://neil.brown.name/md	2010-08-10 15:38:19 -07:00
md.h	Merge branch 'for-linus' of git://neil.brown.name/md	2010-08-10 15:38:19 -07:00
multipath.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
multipath.h	md: remove mddev_to_conf "helper" macro	2009-06-16 16:54:21 +10:00
raid0.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
raid0.h	md: fix handling of array level takeover that re-arranges devices.	2010-06-24 13:33:24 +10:00
raid1.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
raid1.h	md/raid1: add takeover support for raid5->raid1	2009-12-14 12:51:41 +11:00
raid5.c	Merge branch 'for-linus' of git://neil.brown.name/md	2010-08-10 15:38:19 -07:00
raid5.h	md/raid5: export raid5 unplugging interface.	2010-07-26 12:53:10 +10:00
raid10.c	Merge branch 'for-linus' of git://neil.brown.name/md	2010-08-10 15:38:19 -07:00
raid10.h	md: fix handling of array level takeover that re-arranges devices.	2010-06-24 13:33:24 +10:00