kernel/linux.git/include/linux/device-mapper.h, branch v6.6.132

block: replace fmode_t with a block-specific type for block open flags

2023-06-12T14:04:05+00:00

The only overlap between the block open flags mapped into the fmode_t and other uses of fmode_t are FMODE_READ and FMODE_WRITE. Define a new blk_mode_t instead for use in blkdev_get_by_{dev,path}, ->open and ->ioctl and stop abusing fmode_t. Signed-off-by: Christoph Hellwig Acked-by: Jack Wang [rnbd] Reviewed-by: Hannes Reinecke Reviewed-by: Christian Brauner Link: https://lore.kernel.org/r/20230608110258.189493-28-hch@lst.de Signed-off-by: Jens Axboe

dm: remove dm_get_dev_t

2023-06-05T16:57:40+00:00

Open code dm_get_dev_t in the only remaining caller, and propagate the exact error code from lookup_bdev and early_lookup_bdev. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20230531125535.676098-20-hch@lst.de Signed-off-by: Jens Axboe

dm: unexport dm_get_queue_limits()

2023-04-14T16:32:20+00:00

There are no dm_get_queue_limits() callers outside of DM core and there shouldn't be. Also, remove its BUG_ON(!atomic_read(&md->holders)) to micro-optimize __process_abnormal_io(). Signed-off-by: Mike Snitzer

dm: allow targets to require splitting WRITE_ZEROES and SECURE_ERASE

2023-04-14T16:07:27+00:00

Introduce max_write_zeroes_granularity and max_secure_erase_granularity flags in the dm_target struct. If a target sets these then DM core will split IO of these operation types accordingly (in terms of max_write_zeroes_sectors and max_secure_erase_sectors respectively). Signed-off-by: Mike Snitzer

dm: add helper macro for simple DM target module init and exit

2023-04-11T16:09:08+00:00

Eliminate duplicate boilerplate code for simple modules that contain a single DM target driver without any additional setup code. Add a new module_dm() macro, which replaces the module_init() and module_exit() with template functions that call dm_register_target() and dm_unregister_target() respectively. Signed-off-by: Yangtao Li Signed-off-by: Mike Snitzer

dm: split discards further if target sets max_discard_granularity

2023-03-30T19:57:50+00:00

The block core (bio_split_discard) will already split discards based on the 'discard_granularity' and 'max_discard_sectors' queue_limits. But the DM thin target also needs to ensure that it doesn't receive a discard that spans a 'max_discard_sectors' boundary. Introduce a dm_target 'max_discard_granularity' flag that if set will cause DM core to split discard bios relative to 'max_discard_sectors'. This treats 'discard_granularity' as a "min_discard_granularity" and 'max_discard_sectors' as a "max_discard_granularity". Requested-by: Joe Thornber Signed-off-by: Mike Snitzer

dm: correct block comments format.

2023-02-14T19:23:06+00:00

Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer

dm: enclose complex macros into parentheses where possible

2023-02-14T19:23:06+00:00

Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer

dm: change "unsigned" to "unsigned int"

2023-02-14T19:23:06+00:00

Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer

dm: add missing SPDX-License-Indentifiers

2023-02-14T19:23:06+00:00

'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has deprecated its use. Suggested-by: John Wiele Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer