linux-stable.git/block/ioctl.c, branch v6.0

block: replace blkdev_nr_zones with bdev_nr_zones

2022-07-06T12:46:26+00:00

Pass a block_device instead of a request_queue as that is what most
callers have at hand.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Johannes Thumshirn 
Reviewed-by: Damien Le Moal 
Acked-by: Damien Le Moal 
Link: https://lore.kernel.org/r/20220706070350.1703384-12-hch@lst.de
Signed-off-by: Jens Axboe

block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD

2022-04-18T01:49:59+00:00

Secure erase is a very different operation from discard in that it is
a data integrity operation vs hint.  Fully split the limits and helper
infrastructure to make the separation more clear.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Acked-by: Christoph Böhmwalder  [drbd]
Acked-by: Ryusuke Konishi  [nifs2]
Acked-by: Jaegeuk Kim  [f2fs]
Acked-by: Coly Li  [bcache]
Acked-by: David Sterba  [btrfs]
Acked-by: Chao Yu 
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20220415045258.199825-27-hch@lst.de
Signed-off-by: Jens Axboe

block: remove QUEUE_FLAG_DISCARD

2022-04-18T01:49:59+00:00

Just use a non-zero max_discard_sectors as an indicator for discard
support, similar to what is done for write zeroes.

The only places where needs special attention is the RAID5 driver,
which must clear discard support for security reasons by default,
even if the default stacking rules would allow for it.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Acked-by: Christoph Böhmwalder  [drbd]
Acked-by: Jan Höppner  [s390]
Acked-by: Coly Li  [bcache]
Acked-by: David Sterba  [btrfs]
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20220415045258.199825-25-hch@lst.de
Signed-off-by: Jens Axboe

block: add a bdev_nonrot helper

2022-04-18T01:49:59+00:00

Add a helper to check the nonrot flag based on the block_device instead
of having to poke into the block layer internal request_queue.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Acked-by: David Sterba  [btrfs]
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20220415045258.199825-12-hch@lst.de
Signed-off-by: Jens Axboe

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