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Diffstat (limited to 'include/linux/device-mapper.h')
-rw-r--r--include/linux/device-mapper.h40
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.
*/