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b522adcde9
linux/drivers/md
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Dan Williams b522adcde9 md: 'array_size' sysfs attribute 
Allow userspace to set the size of the array according to the following
semantics:

1/ size must be <= to the size returned by mddev->pers->size(mddev, 0, 0)
   a) If size is set before the array is running, do_md_run will fail
      if size is greater than the default size
   b) A reshape attempt that reduces the default size to less than the set
      array size should be blocked
2/ once userspace sets the size the kernel will not change it
3/ writing 'default' to this attribute returns control of the size to the
   kernel and reverts to the size reported by the personality

Also, convert locations that need to know the default size from directly
reading ->array_sectors to <pers>_size.  Resync/reshape operations
always follow the default size.

Finally, fixup other locations that read a number of 1k-blocks from
userspace to use strict_blocks_to_sectors() which checks for unsigned
long long to sector_t overflow and blocks to sectors overflow.

Reviewed-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-03-31 15:00:31 +11:00
..
raid6test md: raid6: clean up the style of raid6test/test.c 2008-02-06 10:41:18 -08:00
.gitignore
bitmap.c md: Make mddev->size sector-based. 2009-03-31 14:33:13 +11:00
bitmap.h md: move headers out of include/linux/raid/ 2009-03-31 14:27:03 +11:00
dm-bio-list.h dm: bio_list macro renaming 2007-10-20 02:01:11 +01:00
dm-bio-record.h
dm-crypt.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-delay.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-exception-store.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-exception-store.h dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-io.c block: fix bad definition of BIO_RW_SYNC 2009-02-18 10:32:00 +01:00
dm-ioctl.c dm table: rework reference counting 2009-01-06 03:05:10 +00:00
dm-kcopyd.c block: fix bad definition of BIO_RW_SYNC 2009-02-18 10:32:00 +01:00
dm-linear.c dm: support barriers on simple devices 2009-01-06 03:05:09 +00:00
dm-log.c dm log: ensure log bitmap fits on log device 2009-01-06 03:05:02 +00:00
dm-mpath.c dm mpath: move trigger_event to system workqueue 2009-01-06 03:05:13 +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: remove dm header from targets 2008-10-21 17:44:59 +01:00
dm-path-selector.h [PATCH] struct path: rename DM's struct path 2006-12-08 08:28:40 -08:00
dm-raid1.c dm log: move region_size validation 2009-01-06 03:05:01 +00:00
dm-region-hash.c dm raid1: separate region_hash interface part1 2008-10-21 17:45:06 +01:00
dm-round-robin.c dm: remove dm header from targets 2008-10-21 17:44:59 +01:00
dm-snap-persistent.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap-transient.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap.h dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-stripe.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-sysfs.c dm: add name and uuid to sysfs 2009-01-06 03:05:12 +00:00
dm-table.c dm table: rework reference counting 2009-01-06 03:05:10 +00:00
dm-target.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-uevent.c md: replace remaining __FUNCTION__ occurrences 2008-04-28 08:58:42 -07:00
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: add name and uuid to sysfs 2009-01-06 03:05:12 +00:00
dm.h dm: add name and uuid to sysfs 2009-01-06 03:05:12 +00:00
faulty.c md: centralize ->array_sectors modifications 2009-03-31 14:59:03 +11:00
Kconfig raid, fastboot: hide RAID autodetect option if MD is compiled as a module 2008-10-12 08:25:14 -07:00
linear.c md: centralize ->array_sectors modifications 2009-03-31 14:59:03 +11:00
linear.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
Makefile cleanup drivers/md/Makefile 2009-03-31 14:27:02 +11:00
md.c md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
md.h md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
mktables.c md: raid6: Fix mktable.c 2008-02-06 10:41:18 -08:00
multipath.c md: centralize ->array_sectors modifications 2009-03-31 14:59:03 +11:00
multipath.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
raid0.c md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
raid0.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
raid1.c md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
raid1.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
raid5.c md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
raid5.h md/raid5: refactor raid5 "run" 2009-03-31 14:39:39 +11:00
raid6.h md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6algos.c md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6altivec.uc md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6int.uc md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6mmx.c md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6recov.c md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6sse1.c md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6sse2.c md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid6x86.h md: fix typo in FSF address 2009-03-31 14:57:37 +11:00
raid10.c md: 'array_size' sysfs attribute 2009-03-31 15:00:31 +11:00
raid10.h md: move lots of #include lines out of .h files and into .c 2009-03-31 14:33:13 +11:00
unroll.pl