linux-stable.git/block/ioctl.c, branch v5.18.2

block/compat_ioctl: fix range check in BLKGETSIZE

2022-04-15T12:32:40+00:00

kernel ulong and compat_ulong_t may not be same width. Use type directly
to eliminate mismatches.

This would result in truncation rather than EFBIG for 32bit mode for
large disks.

Reviewed-by: Bart Van Assche 
Signed-off-by: Khazhismel Kumykov 
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20220414224056.2875681-1-khazhy@google.com
Signed-off-by: Jens Axboe

block: merge disk_scan_partitions and blkdev_reread_part

2021-11-29T13:35:21+00:00

Unify the functionality that implements a partition rescan for a
gendisk.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211122130625.1136848-6-hch@lst.de
Signed-off-by: Jens Axboe

block: Hold invalidate_lock in BLKZEROOUT ioctl

2021-11-09T19:41:12+00:00

When BLKZEROOUT ioctl and data read race, the data read leaves stale
page cache. To avoid the stale page cache, hold invalidate_lock of the
block device file mapping. The stale page cache is observed when
blktests test case block/009 is modified to call "blkdiscard -z" command
and repeated hundreds of times.

This patch can be applied back to the stable kernel version v5.15.y.
Rework is required for older stable kernels.

Fixes: 22dd6d356628 ("block: invalidate the page cache when issuing BLKZEROOUT")
Signed-off-by: Shin'ichiro Kawasaki 
Cc: stable@vger.kernel.org # v5.15
Reviewed-by: Jan Kara 
Link: https://lore.kernel.org/r/20211109104723.835533-3-shinichiro.kawasaki@wdc.com
Signed-off-by: Jens Axboe

block: Hold invalidate_lock in BLKDISCARD ioctl

2021-11-09T19:41:12+00:00

When BLKDISCARD ioctl and data read race, the data read leaves stale
page cache. To avoid the stale page cache, hold invalidate_lock of the
block device file mapping. The stale page cache is observed when
blktests test case block/009 is repeated hundreds of times.

This patch can be applied back to the stable kernel version v5.15.y
with slight patch edit. Rework is required for older stable kernels.

Fixes: 351499a172c0 ("block: Invalidate cache on discard v2")
Signed-off-by: Shin'ichiro Kawasaki 
Cc: stable@vger.kernel.org # v5.15
Reviewed-by: Jan Kara 
Link: https://lore.kernel.org/r/20211109104723.835533-2-shinichiro.kawasaki@wdc.com
Signed-off-by: Jens Axboe

block/ioctl: use bdev_nr_sectors and bdev_nr_bytes

2021-10-19T12:16:50+00:00

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211019062024.2171074-2-hch@lst.de
Signed-off-by: Jens Axboe

block: merge block_ioctl into blkdev_ioctl

2021-10-18T12:17:34+00:00

Simplify the ioctl path and match the code structure on the compat side.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211012104450.659013-4-hch@lst.de
Signed-off-by: Jens Axboe

block: unexport blkdev_ioctl

2021-10-18T12:17:34+00:00

With the raw driver gone, there is no modular user left.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20211012104450.659013-2-hch@lst.de
Signed-off-by: Jens Axboe

block: pass a gendisk to bdev_resize_partition

2021-08-12T16:31:36+00:00

bdev_resize_partition can only operate on the whole device.  Make that clear
by passing a gendisk instead of a block_device.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20210810154512.1809898-5-hch@lst.de
Signed-off-by: Jens Axboe

block: pass a gendisk to bdev_del_partition

2021-08-12T16:31:35+00:00

bdev_del_partition can only operate on the whole device.  Make that clear
by passing a gendisk instead of a block_device.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20210810154512.1809898-4-hch@lst.de
Signed-off-by: Jens Axboe

block: pass a gendisk to bdev_add_partition

2021-08-12T16:31:35+00:00

bdev_add_partition can only operate on the whole device.  Make that clear
by passing a gendisk instead of a block_device.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20210810154512.1809898-3-hch@lst.de
Signed-off-by: Jens Axboe