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Diffstat (limited to 'include/linux/device-mapper.h')
-rw-r--r--include/linux/device-mapper.h32
1 files changed, 30 insertions, 2 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 61a66fb8ebb3..7f4ac87c0b32 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -93,9 +93,18 @@ typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv,
typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev);
+#ifdef CONFIG_BLK_DEV_ZONED
typedef int (*dm_report_zones_fn) (struct dm_target *ti,
struct dm_report_zones_args *args,
unsigned int nr_zones);
+#else
+/*
+ * Define dm_report_zones_fn so that targets can assign to NULL if
+ * CONFIG_BLK_DEV_ZONED disabled. Otherwise each target needs to do
+ * awkward #ifdefs in their target_type, etc.
+ */
+typedef int (*dm_report_zones_fn) (struct dm_target *dummy);
+#endif
/*
* These iteration functions are typically used to check (and combine)
@@ -187,9 +196,7 @@ struct target_type {
dm_status_fn status;
dm_message_fn message;
dm_prepare_ioctl_fn prepare_ioctl;
-#ifdef CONFIG_BLK_DEV_ZONED
dm_report_zones_fn report_zones;
-#endif
dm_busy_fn busy;
dm_iterate_devices_fn iterate_devices;
dm_io_hints_fn io_hints;
@@ -248,8 +255,13 @@ struct target_type {
/*
* Indicates that a target supports host-managed zoned block devices.
*/
+#ifdef CONFIG_BLK_DEV_ZONED
#define DM_TARGET_ZONED_HM 0x00000040
#define dm_target_supports_zoned_hm(type) ((type)->features & DM_TARGET_ZONED_HM)
+#else
+#define DM_TARGET_ZONED_HM 0x00000000
+#define dm_target_supports_zoned_hm(type) (false)
+#endif
/*
* A target handles REQ_NOWAIT
@@ -257,6 +269,12 @@ struct target_type {
#define DM_TARGET_NOWAIT 0x00000080
#define dm_target_supports_nowait(type) ((type)->features & DM_TARGET_NOWAIT)
+/*
+ * A target supports passing through inline crypto support.
+ */
+#define DM_TARGET_PASSES_CRYPTO 0x00000100
+#define dm_target_passes_crypto(type) ((type)->features & DM_TARGET_PASSES_CRYPTO)
+
struct dm_target {
struct dm_table *table;
struct target_type *type;
@@ -325,6 +343,11 @@ struct dm_target {
* whether or not its underlying devices have support.
*/
bool discards_supported:1;
+
+ /*
+ * Set if we need to limit the number of in-flight bios when swapping.
+ */
+ bool limit_swap_bios:1;
};
void *dm_per_bio_data(struct bio *bio, size_t data_size);
@@ -534,6 +557,11 @@ struct dm_table *dm_swap_table(struct mapped_device *md,
struct dm_table *t);
/*
+ * Table keyslot manager functions
+ */
+void dm_destroy_keyslot_manager(struct blk_keyslot_manager *ksm);
+
+/*
* A wrapper around vmalloc.
*/
void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);