kernel/linux.git/include/linux/device-mapper.h, branch v6.19.11

block: introduce disk_report_zone()

2025-11-05T15:07:21+00:00

Commit b76b840fd933 ("dm: Fix dm-zoned-reclaim zone write pointer alignment") introduced an indirect call for the callback function of a report zones executed with blkdev_report_zones(). This is necessary so that the function disk_zone_wplug_sync_wp_offset() can be called to refresh a zone write plug zone write pointer offset after a write error. However, this solution makes following the path of a zone information harder to understand. Clean this up by introducing the new blk_report_zones_args structure to define a zone report callback and its private data and introduce the helper function disk_report_zone() which calls both disk_zone_wplug_sync_wp_offset() and the zone report user callback function for all zones of a zone report. This helper function must be called by all block device drivers that implement the report zones block operation in order to correctly report a zone information. All block device drivers supporting the report_zones block operation are updated to use this new scheme. Signed-off-by: Damien Le Moal Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Reviewed-by: Chaitanya Kulkarni Reviewed-by: Hannes Reinecke Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe

mm: remove callers of pfn_t functionality

2025-07-10T05:42:19+00:00

All PFN_* pfn_t flags have been removed. Therefore there is no longer a need for the pfn_t type and all uses can be replaced with normal pfns. Link: https://lkml.kernel.org/r/bbedfa576c9822f8032494efbe43544628698b1f.1750323463.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple Reviewed-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Acked-by: David Hildenbrand Cc: Balbir Singh Cc: Björn Töpel Cc: Björn Töpel Cc: Chunyan Zhang Cc: Dan Williams Cc: Deepak Gupta Cc: Gerald Schaefer Cc: Inki Dae Cc: John Groves Cc: John Hubbard Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Will Deacon Signed-off-by: Andrew Morton

dm: Allow .prepare_ioctl to handle ioctls directly

2025-05-04T09:35:05+00:00

This adds a 'bool *forward' parameter to .prepare_ioctl, which allows device mapper targets to accept ioctls to themselves instead of the underlying device. If the target already fully handled the ioctl, it sets *forward to false and device mapper won't forward it to the underlying device any more. In order for targets to actually know what the ioctl is about and how to handle it, pass also cmd and arg. As long as targets restrict themselves to interpreting ioctls of type DM_IOCTL, this is a backwards compatible change because previously, any such ioctl would have been passed down through all device mapper layers until it reached a device that can't understand the ioctl and would return an error. Signed-off-by: Kevin Wolf Reviewed-by: Benjamin Marzinski Signed-off-by: Mikulas Patocka

dm-table: atomic writes support

2025-01-17T21:23:47+00:00

Support stacking atomic write limits for DM devices. All the pre-existing code in blk_stack_atomic_writes_limits() already takes care of finding the aggregrate limits from the bottom devices. Feature flag DM_TARGET_ATOMIC_WRITES is introduced so that atomic writes can be enabled on personalities selectively. This is to ensure that atomic writes are only enabled when verified to be working properly (for a specific personality). In addition, it just may not make sense to enable atomic writes on some personalities (so this flag also helps there). Signed-off-by: John Garry Reviewed-by: Mike Snitzer Signed-off-by: Mikulas Patocka

dm: Remove unused declaration dm_get_rq_mapinfo()

2024-08-21T11:12:12+00:00

Commit ae6ad75e5c3c ("dm: remove unused dm_get_rq_mapinfo()") removed the implementation but leave declaration. Signed-off-by: Yue Haibing Reviewed-by: Damien Le Moal Signed-off-by: Mikulas Patocka

Merge tag 'for-6.11/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2024-07-19T17:48:44+00:00

Pull device mapper updates from Mikulas Patocka: - Optimize processing of flush bios in the dm-linear and dm-stripe targets - Dm-io cleansups and refactoring - Remove unused 'struct thunk' in dm-cache - Handle minor device numbers > 255 in dm-init - Dm-verity refactoring & enabling platform keyring - Fix warning in dm-raid - Improve dm-crypt performance - split bios to smaller pieces, so that They could be processed concurrently - Stop using blk_limits_io_{min,opt} - Dm-vdo cleanup and refactoring - Remove max_write_zeroes_granularity and max_secure_erase_granularity - Dm-multipath cleanup & refactoring - Add dm-crypt and dm-integrity support for non-power-of-2 sector size - Fix reshape in dm-raid - Make dm_block_validator const * tag 'for-6.11/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (33 commits) dm vdo: fix a minor formatting issue in vdo.rst dm vdo int-map: fix kerneldoc formatting dm vdo repair: add missing kerneldoc fields dm: Constify struct dm_block_validator dm-integrity: introduce the Inline mode dm: introduce the target flag mempool_needs_integrity dm raid: fix stripes adding reshape size issues dm raid: move _get_reshape_sectors() as prerequisite to fixing reshape size issues dm-crypt: support for per-sector NVMe metadata dm mpath: don't call dm_get_device in multipath_message dm: factor out helper function from dm_get_device dm-verity: fix dm_is_verity_target() when dm-verity is builtin dm: Remove max_secure_erase_granularity dm: Remove max_write_zeroes_granularity dm vdo indexer: use swap() instead of open coding it dm vdo: remove unused struct 'uds_attribute' dm: stop using blk_limits_io_{min,opt} dm-crypt: limit the size of encryption requests dm verity: add support for signature verification with platform keyring dm-raid: Fix WARN_ON_ONCE check for sync_thread in raid_resume ...

dm: introduce the target flag mempool_needs_integrity

2024-07-12T16:39:06+00:00

This commit introduces the dm target flag mempool_needs_integrity. When the flag is set, device mapper will call bioset_integrity_create on it's bio sets. The target can then call bio_integrity_alloc on the bios allocated from the table's mempool. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer

dm: factor out helper function from dm_get_device

2024-07-10T11:10:06+00:00

Factor out a helper function, dm_devt_from_path(), from dm_get_device() for use in dm targets. Signed-off-by: Benjamin Marzinski Signed-off-by: Mikulas Patocka

dm: Remove max_secure_erase_granularity

2024-07-10T11:10:06+00:00

The max_secure_erase_granularity boolean of struct dm_target is used in __process_abnormal_io() but never set by any target. Remove this field and the dead code using it. Signed-off-by: Damien Le Moal Signed-off-by: Mikulas Patocka

dm: Remove max_write_zeroes_granularity

2024-07-10T11:10:06+00:00

The max_write_zeroes_granularity boolean of struct dm_target is used in __process_abnormal_io() but never set by any target. Remove this field and the dead code using it. Signed-off-by: Damien Le Moal Signed-off-by: Mikulas Patocka