linux.git/drivers/md/dm-linear.c, branch v5.13

dm: simplify target code conditional on CONFIG_BLK_DEV_ZONED

2021-02-11T14:45:27+00:00

Allow removal of CONFIG_BLK_DEV_ZONED conditionals in target_type
definition of various targets.

Suggested-by: Eric Biggers 
Signed-off-by: Mike Snitzer

dm: set DM_TARGET_PASSES_CRYPTO feature for some targets

2021-02-11T14:45:26+00:00

dm-linear and dm-flakey obviously can pass through inline crypto support.

Co-developed-by: Eric Biggers 
Signed-off-by: Eric Biggers 
Signed-off-by: Satya Tangirala 
Signed-off-by: Mike Snitzer

dm: add support for REQ_NOWAIT and enable it for linear target

2020-09-25T14:20:03+00:00

Add DM target feature flag DM_TARGET_NOWAIT which advertises that
target works with REQ_NOWAIT bios.

Add dm_table_supports_nowait() and update dm_table_set_restrictions()
to set/clear QUEUE_FLAG_NOWAIT accordingly.

Signed-off-by: Konstantin Khlebnikov 
Signed-off-by: Mike Snitzer 
Signed-off-by: Jens Axboe

dm,dax: Add dax zero_page_range operation

2020-04-03T02:15:03+00:00

This patch adds support for dax zero_page_range operation to dm targets.

Signed-off-by: Vivek Goyal 
Acked-by: Mike Snitzer 
Link: https://lore.kernel.org/r/20200228163456.1587-5-vgoyal@redhat.com
Signed-off-by: Dan Williams

block: rework zone reporting

2019-11-13T02:12:07+00:00

Avoid the need to allocate a potentially large array of struct blk_zone
in the block layer by switching the ->report_zones method interface to
a callback model. Now the caller simply supplies a callback that is
executed on each reported zone, and private data for it.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Shin'ichiro Kawasaki 
Signed-off-by: Damien Le Moal 
Reviewed-by: Hannes Reinecke 
Reviewed-by: Mike Snitzer 
Signed-off-by: Jens Axboe

dm: add zone open, close and finish support

2019-11-07T13:36:08+00:00

Implement REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH
support to allow explicit control of zone states.

Contains contributions from Matias Bjorling, Hans Holmberg and
Damien Le Moal.

Acked-by: Mike Snitzer 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Ajay Joshi 
Signed-off-by: Matias Bjorling 
Signed-off-by: Hans Holmberg 
Signed-off-by: Damien Le Moal 
Signed-off-by: Jens Axboe

block: Kill gfp_t argument of blkdev_report_zones()

2019-07-12T02:04:37+00:00

Only GFP_KERNEL and GFP_NOIO are used with blkdev_report_zones(). In
preparation of using vmalloc() for large report buffer and zone array
allocations used by this function, remove its "gfp_t gfp_mask" argument
and rely on the caller context to use memalloc_noio_save/restore() where
necessary (block layer zone revalidation and dm-zoned I/O error path).

Reviewed-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Signed-off-by: Damien Le Moal 
Signed-off-by: Jens Axboe

dm: Check for device sector overflow if CONFIG_LBDAF is not set

2018-12-18T14:02:26+00:00

Reference to a device in device-mapper table contains offset in sectors.

If the sector_t is 32bit integer (CONFIG_LBDAF is not set), then
several device-mapper targets can overflow this offset and validity
check is then performed on a wrong offset and a wrong table is activated.

See for example (on 32bit without CONFIG_LBDAF) this overflow:

  # dmsetup create test --table "0 2048 linear /dev/sdg 4294967297"
  # dmsetup table test
  0 2048 linear 8:96 1

This patch adds explicit check for overflow if the offset is sector_t type.

Signed-off-by: Milan Broz 
Reviewed-by: Mikulas Patocka 
Signed-off-by: Mike Snitzer

block: add a report_zones method

2018-10-25T17:17:40+00:00

Dispatching a report zones command through the request queue is a major
pain due to the command reply payload rewriting necessary. Given that
blkdev_report_zones() is executing everything synchronously, implement
report zones as a block device file operation instead, allowing major
simplification of the code in many places.

sd, null-blk, dm-linear and dm-flakey being the only block device
drivers supporting exposing zoned block devices, these drivers are
modified to provide the device side implementation of the
report_zones() block device file operation.

For device mappers, a new report_zones() target type operation is
defined so that the upper block layer calls blkdev_report_zones() can
be propagated down to the underlying devices of the dm targets.
Implementation for this new operation is added to the dm-linear and
dm-flakey targets.

Reviewed-by: Hannes Reinecke 
Signed-off-by: Christoph Hellwig 
[Damien]
* Changed method block_device argument to gendisk
* Various bug fixes and improvements
* Added support for null_blk, dm-linear and dm-flakey.
Reviewed-by: Martin K. Petersen 
Reviewed-by: Mike Snitzer 
Signed-off-by: Damien Le Moal 
Signed-off-by: Jens Axboe

dm linear: fix linear_end_io conditional definition

2018-10-11T03:22:24+00:00

The dm-linear target is independent of the dm-zoned target. For code
requiring support for zoned block devices, use CONFIG_BLK_DEV_ZONED
instead of CONFIG_DM_ZONED.

While at it, similarly to dm linear, also enable the DM_TARGET_ZONED_HM
feature in dm-flakey only if CONFIG_BLK_DEV_ZONED is defined.

Fixes: beb9caac211c1 ("dm linear: eliminate linear_end_io call if CONFIG_DM_ZONED disabled")
Fixes: 0be12c1c7fce7 ("dm linear: add support for zoned block devices")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal 
Signed-off-by: Mike Snitzer