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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/md/dm-core.h
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@@ -11,7 +11,9 @@
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 #include <linux/kthread.h>
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 #include <linux/ktime.h>
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+#include <linux/genhd.h>
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 #include <linux/blk-mq.h>
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+#include <linux/keyslot-manager.h>
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 #include <trace/events/block.h>
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@@ -25,9 +27,11 @@
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 };
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 /*
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- * DM core internal structure that used directly by dm.c and dm-rq.c
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- * DM targets must _not_ deference a mapped_device to directly access its members!
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+ * DM core internal structures used directly by dm.c, dm-rq.c and dm-table.c.
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+ * DM targets must _not_ deference a mapped_device or dm_table to directly
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+ * access their members!
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  */
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+
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 struct mapped_device {
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 	struct mutex suspend_lock;
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@@ -65,7 +69,6 @@
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 	 */
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 	struct work_struct work;
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 	wait_queue_head_t wait;
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-	atomic_t pending[2];
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 	spinlock_t deferred_lock;
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 	struct bio_list deferred;
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@@ -94,11 +97,6 @@
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 	 */
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 	struct workqueue_struct *wq;
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-	/*
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-	 * freeze/thaw support require holding onto a super block
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-	 */
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-	struct super_block *frozen_sb;
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-
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 	/* forced geometry settings */
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 	struct hd_geometry geometry;
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@@ -107,33 +105,76 @@
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 	struct block_device *bdev;
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-	/* zero-length flush that will be cloned and submitted to targets */
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-	struct bio flush_bio;
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+	int swap_bios;
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+	struct semaphore swap_bios_semaphore;
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+	struct mutex swap_bios_lock;
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 	struct dm_stats stats;
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-	struct kthread_worker kworker;
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-	struct task_struct *kworker_task;
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-
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-	/* for request-based merge heuristic in dm_request_fn() */
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-	unsigned seq_rq_merge_deadline_usecs;
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-	int last_rq_rw;
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-	sector_t last_rq_pos;
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-	ktime_t last_rq_start_time;
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-
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 	/* for blk-mq request-based DM support */
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 	struct blk_mq_tag_set *tag_set;
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-	bool use_blk_mq:1;
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 	bool init_tio_pdu:1;
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 	struct srcu_struct io_barrier;
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 };
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-int md_in_flight(struct mapped_device *md);
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 void disable_discard(struct mapped_device *md);
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 void disable_write_same(struct mapped_device *md);
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 void disable_write_zeroes(struct mapped_device *md);
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+static inline sector_t dm_get_size(struct mapped_device *md)
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+{
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+	return get_capacity(md->disk);
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+}
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+
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+static inline struct dm_stats *dm_get_stats(struct mapped_device *md)
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+{
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+	return &md->stats;
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+}
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+
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+#define DM_TABLE_MAX_DEPTH 16
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+
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+struct dm_table {
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+	struct mapped_device *md;
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+	enum dm_queue_mode type;
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+
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+	/* btree table */
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+	unsigned int depth;
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+	unsigned int counts[DM_TABLE_MAX_DEPTH]; /* in nodes */
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+	sector_t *index[DM_TABLE_MAX_DEPTH];
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+
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+	unsigned int num_targets;
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+	unsigned int num_allocated;
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+	sector_t *highs;
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+	struct dm_target *targets;
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+
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+	struct target_type *immutable_target_type;
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+
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+	bool integrity_supported:1;
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+	bool singleton:1;
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+	unsigned integrity_added:1;
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+
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+	/*
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+	 * Indicates the rw permissions for the new logical
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+	 * device.  This should be a combination of FMODE_READ
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+	 * and FMODE_WRITE.
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+	 */
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+	fmode_t mode;
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+
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+	/* a list of devices used by this table */
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+	struct list_head devices;
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+
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+	/* events get handed up using this callback */
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+	void (*event_fn)(void *);
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+	void *event_context;
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+
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+	struct dm_md_mempools *mempools;
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+
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+#ifdef CONFIG_BLK_INLINE_ENCRYPTION
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+	struct blk_keyslot_manager *ksm;
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+#endif
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+};
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+
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 static inline struct completion *dm_get_completion_from_kobject(struct kobject *kobj)
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 {
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 	return &container_of(kobj, struct dm_kobject_holder, kobj)->completion;