diff options
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 40 |
1 files changed, 38 insertions, 2 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. */ |