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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-26 13:05:21 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-26 13:05:21 -0700 |
commit | 48dc810012a6b4f4ba94073d6b7edb4f76edeb72 (patch) | |
tree | df9bee18cc806bb23b2bc279369c1a8deec12df1 /include | |
parent | 9dd6956b38923dc1b7b349ca1eee3c0bb1f0163a (diff) | |
parent | 38d11da522aacaa05898c734a1cec86f1e611129 (diff) | |
download | lwn-48dc810012a6b4f4ba94073d6b7edb4f76edeb72.tar.gz lwn-48dc810012a6b4f4ba94073d6b7edb4f76edeb72.zip |
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
...
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/device-mapper.h | 40 | ||||
-rw-r--r-- | include/linux/dm-bufio.h | 6 | ||||
-rw-r--r-- | include/uapi/linux/dm-ioctl.h | 4 |
3 files changed, 40 insertions, 10 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 7975483816e4..a52d2b9a6846 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -359,6 +359,24 @@ struct dm_target { bool discards_supported:1; /* + * Set if this target requires that discards be split on + * 'max_discard_sectors' boundaries. + */ + bool max_discard_granularity:1; + + /* + * Set if this target requires that secure_erases be split on + * 'max_secure_erase_sectors' boundaries. + */ + bool max_secure_erase_granularity:1; + + /* + * Set if this target requires that write_zeroes be split on + * 'max_write_zeroes_sectors' boundaries. + */ + bool max_write_zeroes_granularity:1; + + /* * Set if we need to limit the number of in-flight bios when swapping. */ bool limit_swap_bios:1; @@ -512,8 +530,6 @@ int __init dm_early_create(struct dm_ioctl *dmi, struct dm_target_spec **spec_array, char **target_params_array); -struct queue_limits *dm_get_queue_limits(struct mapped_device *md); - /* * Geometry functions. */ @@ -625,6 +641,26 @@ void dm_destroy_crypto_profile(struct blk_crypto_profile *profile); DMEMIT("target_name=%s,target_version=%u.%u.%u", \ (y)->name, (y)->version[0], (y)->version[1], (y)->version[2]) +/** + * module_dm() - Helper macro for DM targets that don't do anything + * special in their module_init and module_exit. + * Each module may only use this macro once, and calling it replaces + * module_init() and module_exit(). + * + * @name: DM target's name + */ +#define module_dm(name) \ +static int __init dm_##name##_init(void) \ +{ \ + return dm_register_target(&(name##_target)); \ +} \ +module_init(dm_##name##_init) \ +static void __exit dm_##name##_exit(void) \ +{ \ + dm_unregister_target(&(name##_target)); \ +} \ +module_exit(dm_##name##_exit) + /* * Definitions of return values from target end_io function. */ diff --git a/include/linux/dm-bufio.h b/include/linux/dm-bufio.h index 2056743aaaaa..681656a1c03d 100644 --- a/include/linux/dm-bufio.h +++ b/include/linux/dm-bufio.h @@ -131,12 +131,6 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c); int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t count); /* - * Like dm_bufio_release but also move the buffer to the new - * block. dm_bufio_write_dirty_buffers is needed to commit the new block. - */ -void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block); - -/* * Free the given buffer. * This is just a hint, if the buffer is in use or dirty, this function * does nothing. diff --git a/include/uapi/linux/dm-ioctl.h b/include/uapi/linux/dm-ioctl.h index 7edf335778ba..1990b5700f69 100644 --- a/include/uapi/linux/dm-ioctl.h +++ b/include/uapi/linux/dm-ioctl.h @@ -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 */ |