Tejun Heo 49731baa41 block: restore multiple bd_link_disk_holder() support ... Commit e09b457b (block: simplify holder symlink handling) incorrectly assumed that there is only one link at maximum. dm may use multiple links and expects block layer to track reference count for each link, which is different from and unrelated to the exclusive device holder identified by @holder when the device is opened. Remove the single holder assumption and automatic removal of the link and revive the per-link reference count tracking. The code essentially behaves the same as before commit e09b457b sans the unnecessary kobject reference count dancing. While at it, note that this facility should not be used by anyone else than the current ones. Sysfs symlinks shouldn't be abused like this and the whole thing doesn't belong in the block layer at all. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Milan Broz <mbroz@redhat.com> Cc: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Neil Brown <neilb@suse.de> Cc: linux-raid@vger.kernel.org Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>		2011-01-14 18:44:22 +01:00
..
bitmap.c	md: Don't let implementation detail of curr_resync leak out through sysfs.	2011-01-14 09:14:34 +11:00
bitmap.h	md: use sector_t in bitmap_get_counter	2010-10-28 17:32:26 +11:00
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: add loop aes iv generator	2011-01-13 19:59:55 +00:00
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-io.c	dm: implement REQ_FLUSH/FUA support for bio-based dm	2010-09-10 12:35:38 +02:00
dm-ioctl.c	dm ioctl: suppress needless warning messages	2011-01-13 19:59:55 +00:00
dm-kcopyd.c	dm: use non reentrant workqueues if equivalent	2011-01-13 19:59:58 +00:00
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	dm log userspace: add version number to comms	2011-01-13 19:59:52 +00:00
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 log: use PTR_ERR value instead of ENOMEM	2011-01-13 20:00:00 +00:00
dm-mpath.c	dm mpath: delay activate_path retry on SCSI_DH_RETRY	2011-01-13 20:00:01 +00:00
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	dm: use non reentrant workqueues if equivalent	2011-01-13 19:59:58 +00:00
dm-raid.c	dm: raid456 basic support	2011-01-13 20:00:02 +00:00
dm-region-hash.c	dm: implement REQ_FLUSH/FUA support for bio-based dm	2010-09-10 12:35:38 +02:00
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 make metadata_wq multithreaded	2011-01-13 19:59:59 +00:00
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: avoid storing private suspended state	2011-01-13 19:59:59 +00:00
dm-stripe.c	dm stripe: switch from local workqueue to system_wq	2011-01-13 19:59:57 +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	block: restore multiple bd_link_disk_holder() support	2011-01-14 18:44:22 +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-zero.c	dm: zero silently drop discards	2010-08-12 04:14:12 +01:00
dm.c	dm: remove superfluous irq disablement in dm_request_fn	2011-01-13 20:00:00 +00:00
dm.h	dm: linear support discard	2010-08-12 04:14:08 +01:00
faulty.c	md: use separate bio pool for each md device.	2010-10-28 17:36:15 +11:00
Kconfig	dm: raid456 basic support	2011-01-13 20:00:02 +00:00
linear.c	md: implment REQ_FLUSH/FUA support	2010-09-10 12:35:38 +02:00
linear.h	md/linear: use call_rcu to free obsolete 'conf' structures.	2009-06-18 08:49:42 +10:00
Makefile	dm: raid456 basic support	2011-01-13 20:00:02 +00:00
md.c	block: restore multiple bd_link_disk_holder() support	2011-01-14 18:44:22 +01:00
md.h	md: separate meta and data devs	2011-01-14 09:14:34 +11:00
multipath.c	md: implment REQ_FLUSH/FUA support	2010-09-10 12:35:38 +02:00
multipath.h	md: remove mddev_to_conf "helper" macro	2009-06-16 16:54:21 +10:00
raid0.c	md: implment REQ_FLUSH/FUA support	2010-09-10 12:35:38 +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	md-new-param-to_sync_page_io	2011-01-14 09:14:33 +11:00
raid1.h	md/raid1: discard unused variable.	2010-10-29 16:40:33 +11:00
raid5.c	md/raid5: handle manually-added spares in start_reshape.	2011-01-14 09:14:34 +11:00
raid5.h	md: implment REQ_FLUSH/FUA support	2010-09-10 12:35:38 +02:00
raid10.c	md-new-param-to_sync_page_io	2011-01-14 09:14:33 +11:00
raid10.h	md: fix handling of array level takeover that re-arranges devices.	2010-06-24 13:33:24 +10:00