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- Split dm-bufio's rw_semaphore and rbtree. Offers improvements to

Browse source 
dm-bufio's locking to allow increased concurrent IO -- particularly
   for read access for buffers already in dm-bufio's cache.
 
 - Also split dm-bio-prison-v1's spinlock and rbtree with comparable
   aim at improving concurrent IO (for the DM thinp target).
 
 - Both the dm-bufio and dm-bio-prison-v1 scaling of the number of
   locks and rbtrees used are managed by dm_num_hash_locks(). And the
   hash function used by both is dm_hash_locks_index().
 
 - Allow DM targets to require DISCARD, WRITE_ZEROES and SECURE_ERASE
   to be split at the target specified boundary (in terms of
   max_discard_sectors, max_write_zeroes_sectors and
   max_secure_erase_sectors respectively).
 
 - DM verity error handling fix for check_at_most_once on FEC.
 
 - Update DM verity target to emit audit events on verification failure
   and more.
 
 - DM core ->io_hints improvements needed in support of new discard
   support that is added to the DM "zero" and "error" targets.
 
 - Fix missing kmem_cache_destroy() call in initialization error path
   of both the DM integrity and DM clone targets.
 
 - A couple fixes for DM flakey, also add "error_reads" feature.
 
 - Fix DM core's resume to not lock FS when the DM map is NULL;
   otherwise initial table load can race with FS mount that takes
   superblock's ->s_umount rw_semaphore.
 
 - Various small improvements to both DM core and DM targets.
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Merge tag 'for-6.4/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mike Snitzer:

 - Split dm-bufio's rw_semaphore and rbtree. Offers improvements to
   dm-bufio's locking to allow increased concurrent IO -- particularly
   for read access for buffers already in dm-bufio's cache.

 - Also split dm-bio-prison-v1's spinlock and rbtree with comparable aim
   at improving concurrent IO (for the DM thinp target).

 - Both the dm-bufio and dm-bio-prison-v1 scaling of the number of locks
   and rbtrees used are managed by dm_num_hash_locks(). And the hash
   function used by both is dm_hash_locks_index().

 - Allow DM targets to require DISCARD, WRITE_ZEROES and SECURE_ERASE to
   be split at the target specified boundary (in terms of
   max_discard_sectors, max_write_zeroes_sectors and
   max_secure_erase_sectors respectively).

 - DM verity error handling fix for check_at_most_once on FEC.

 - Update DM verity target to emit audit events on verification failure
   and more.

 - DM core ->io_hints improvements needed in support of new discard
   support that is added to the DM "zero" and "error" targets.

 - Fix missing kmem_cache_destroy() call in initialization error path of
   both the DM integrity and DM clone targets.

 - A couple fixes for DM flakey, also add "error_reads" feature.

 - Fix DM core's resume to not lock FS when the DM map is NULL;
   otherwise initial table load can race with FS mount that takes
   superblock's ->s_umount rw_semaphore.

 - Various small improvements to both DM core and DM targets.

* tag 'for-6.4/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (40 commits)
  dm: don't lock fs when the map is NULL in process of resume
  dm flakey: add an "error_reads" option
  dm flakey: remove trailing space in the table line
  dm flakey: fix a crash with invalid table line
  dm ioctl: fix nested locking in table_clear() to remove deadlock concern
  dm: unexport dm_get_queue_limits()
  dm: allow targets to require splitting WRITE_ZEROES and SECURE_ERASE
  dm: add helper macro for simple DM target module init and exit
  dm raid: remove unused d variable
  dm: remove unnecessary (void*) conversions
  dm mirror: add DMERR message if alloc_workqueue fails
  dm: push error reporting down to dm_register_target()
  dm integrity: call kmem_cache_destroy() in dm_integrity_init() error path
  dm clone: call kmem_cache_destroy() in dm_clone_init() error path
  dm error: add discard support
  dm zero: add discard support
  dm table: allow targets without devices to set ->io_hints
  dm verity: emit audit events on verification failure and more
  dm verity: fix error handling for check_at_most_once on FEC
  dm: improve hash_locks sizing and hash function
  ...
This commit is contained in:
Linus Torvalds 2023-04-26 13:05:21 -07:00
commit 48dc810012
41 changed files with 1776 additions and 1083 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/uapi/linux/dm-ioctl.h
View file

@ -286,9 +286,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 47
#define DM_VERSION_MINOR 48
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2022-07-28)"
#define DM_VERSION_EXTRA "-ioctl (2023-03-01)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */