linux-toradex.git/block/ioctl.c, branch v2.6.28

block: make add_partition() return pointer to hd_struct

2008-11-18T14:08:56+00:00

Make add_partition() return pointer to the new hd_struct on success
and ERR_PTR() value on failure.  This change will be used to fix md
autodetection bug.

Signed-off-by: Tejun Heo 
Cc: Neil Brown 
Signed-off-by: Jens Axboe

[PATCH] kill the rest of struct file propagation in block ioctls

2008-10-21T11:49:14+00:00

Now we can switch blkdev_ioctl() block_device/mode

Signed-off-by: Al Viro

[PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET

2008-10-21T11:49:12+00:00

We need to do bd_claim() only if file hadn't been opened with O_EXCL
and then we have no need to use file itself as owner.

Signed-off-by: Al Viro

[PATCH] get rid of blkdev_locked_ioctl()

2008-10-21T11:49:10+00:00

Most of that stuff doesn't need BKL at all; expand in the (only) caller,
merge the switch into one there and leave BKL only around the stuff that
might actually need it.

Signed-off-by: Al Viro

[PATCH] get rid of blkdev_driver_ioctl()

2008-10-21T11:49:08+00:00

convert remaining callers to __blkdev_driver_ioctl()

Signed-off-by: Al Viro

[PATCH] end of methods switch: remove the old ones

2008-10-21T11:48:52+00:00

Signed-off-by: Al Viro

[PATCH] beginning of methods conversion

2008-10-21T11:47:32+00:00

To keep the size of changesets sane we split the switch by drivers;
to keep the damn thing bisectable we do the following:
	1) rename the affected methods, add ones with correct
prototypes, make (few) callers handle both.  That's this changeset.
	2) for each driver convert to new methods.  *ALL* drivers
are converted in this series.
	3) kill the old (renamed) methods.

Note that it _is_ a flagday; all in-tree drivers are converted and by the
end of this series no trace of old methods remain.  The only reason why
we do that this way is to keep the damn thing bisectable and allow per-driver
debugging if anything goes wrong.

New methods:
	open(bdev, mode)
	release(disk, mode)
	ioctl(bdev, mode, cmd, arg)		/* Called without BKL */
	compat_ioctl(bdev, mode, cmd, arg)
	locked_ioctl(bdev, mode, cmd, arg)	/* Called with BKL, legacy */

Signed-off-by: Al Viro

[PATCH] introduce __blkdev_driver_ioctl()

2008-10-21T11:47:26+00:00

Analog of blkdev_driver_ioctl() with sane arguments.  For
now uses fake struct file, by the end of the series it won't
and blkdev_driver_ioctl() will become a wrapper around it.

Signed-off-by: Al Viro

block: make partition array dynamic

2008-10-09T06:56:08+00:00

disk->__part used to be statically allocated to the maximum possible
number of partitions.  This patch makes partition array allocation
dynamic.  The added overhead is minimal as only real change is one
memory dereference changed to RCU one.  This saves both a bit of
memory and cpu cycles iterating through unoccupied slots and makes
increasing partition limit easier.

Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

block: introduce partition 0

2008-10-09T06:56:07+00:00

genhd and partition code handled disk and partitions separately.  All
information about the whole disk was in struct genhd and partitions in
struct hd_struct.  However, the whole disk (part0) and other
partitions have a lot in common and the data structures end up having
good number of common fields and thus separate code paths doing the
same thing.  Also, the partition array was indexed by partno - 1 which
gets pretty confusing at times.

This patch introduces partition 0 and makes the partition array
indexed by partno.  Following patches will unify the handling of disk
and parts piece-by-piece.

This patch also implements disk_partitionable() which tests whether a
disk is partitionable.  With coming dynamic partition array change,
the most common usage of disk_max_parts() will be testing whether a
disk is partitionable and the number of max partitions will become
much less important.

Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe