kernel_optimize_test/drivers/md
NeilBrown 27c529bb8e md: lock access to rdev attributes properly
When we access attributes of an rdev (component device on an md array) through
sysfs, we really need to lock the array against concurrent changes.  We
currently do that when we change an attribute, but not when we read an
attribute.  We need to lock when reading as well else rdev->mddev could become
NULL while we are accessing it.

So add appropriate locking (mddev_lock) to rdev_attr_show.

rdev_size_store requires some extra care as well as it needs to unlock the
mddev while scanning other mddevs for overlapping regions.  We currently
assume that rdev->mddev will still be unchanged after the scan, but that
cannot be certain.  So take a copy of rdev->mddev for use at the end of the
function.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-04 16:35:18 -08:00
..
raid6test md: raid6: clean up the style of raid6test/test.c 2008-02-06 10:41:18 -08:00
.gitignore
bitmap.c md: reduce CPU wastage on idle md array with a write-intent bitmap 2008-03-04 16:35:17 -08:00
dm-bio-list.h
dm-bio-record.h
dm-crypt.c dm crypt: use async crypto 2008-02-08 02:11:14 +00:00
dm-delay.c
dm-emc.c
dm-exception-store.c dm snapshot: use uninitialized_var 2008-02-08 02:10:11 +00:00
dm-hw-handler.c
dm-hw-handler.h
dm-io.c
dm-io.h
dm-ioctl.c dm ioctl: use uninitialized_var 2008-02-08 02:10:16 +00:00
dm-linear.c
dm-log.c dm log: auto load modules 2008-02-08 02:11:19 +00:00
dm-log.h
dm-mpath-hp-sw.c
dm-mpath-rdac.c
dm-mpath.c dm mpath: add missing static 2008-02-08 02:10:35 +00:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-raid1.c dm-raid1.c: fix NULL dereferences 2008-02-19 15:52:27 -08:00
dm-round-robin.c
dm-snap.c dm snapshot: combine consecutive exceptions in memory 2008-02-08 02:11:27 +00:00
dm-snap.h dm snapshot: combine consecutive exceptions in memory 2008-02-08 02:11:27 +00:00
dm-stripe.c dm: stripe enhanced status return 2008-02-08 02:11:24 +00:00
dm-table.c Introduce path_put() 2008-02-14 21:13:33 -08:00
dm-target.c
dm-uevent.c
dm-uevent.h
dm-zero.c
dm.c dm: move deferred bio flushing to workqueue 2008-02-08 02:11:17 +00:00
dm.h dm: trigger change uevent on rename 2007-12-20 17:32:11 +00:00
faulty.c md: change ITERATE_RDEV to rdev_for_each 2008-02-06 10:41:19 -08:00
Kconfig dm: targets no longer experimental 2008-02-08 02:10:32 +00:00
kcopyd.c
kcopyd.h
linear.c md: change ITERATE_RDEV to rdev_for_each 2008-02-06 10:41:19 -08:00
Makefile
md.c md: lock access to rdev attributes properly 2008-03-04 16:35:18 -08:00
mktables.c md: raid6: Fix mktable.c 2008-02-06 10:41:18 -08:00
multipath.c md: change ITERATE_RDEV to rdev_for_each 2008-02-06 10:41:19 -08:00
raid0.c md: change ITERATE_RDEV to rdev_for_each 2008-02-06 10:41:19 -08:00
raid1.c md: fix deadlock in md/raid1 and md/raid10 when handling a read error 2008-03-04 16:35:17 -08:00
raid5.c md: fix an occasional deadlock in raid5 2008-02-06 10:41:19 -08:00
raid6.h
raid6algos.c
raid6altivec.uc
raid6int.uc
raid6mmx.c
raid6recov.c
raid6sse1.c
raid6sse2.c
raid6x86.h
raid10.c md: fix deadlock in md/raid1 and md/raid10 when handling a read error 2008-03-04 16:35:17 -08:00
unroll.pl