1 files changed, 65 insertions, 0 deletions

diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index 5953ff2bd260..edc1553c4eea 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -114,8 +114,27 @@ struct mapped_device {
 	bool init_tio_pdu:1;
 
 	struct srcu_struct io_barrier;
+
+#ifdef CONFIG_BLK_DEV_ZONED
+	unsigned int nr_zones;
+	unsigned int *zwp_offset;
+#endif
 };
 
+/*
+ * Bits for the flags field of struct mapped_device.
+ */
+#define DMF_BLOCK_IO_FOR_SUSPEND 0
+#define DMF_SUSPENDED 1
+#define DMF_FROZEN 2
+#define DMF_FREEING 3
+#define DMF_DELETING 4
+#define DMF_NOFLUSH_SUSPENDING 5
+#define DMF_DEFERRED_REMOVE 6
+#define DMF_SUSPENDED_INTERNALLY 7
+#define DMF_POST_SUSPENDING 8
+#define DMF_EMULATE_ZONE_APPEND 9
+
 void disable_discard(struct mapped_device *md);
 void disable_write_same(struct mapped_device *md);
 void disable_write_zeroes(struct mapped_device *md);
@@ -130,6 +149,13 @@ static inline struct dm_stats *dm_get_stats(struct mapped_device *md)
 	return &md->stats;
 }
 
+static inline bool dm_emulate_zone_append(struct mapped_device *md)
+{
+	if (blk_queue_is_zoned(md->queue))
+		return test_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
+	return false;
+}
+
 #define DM_TABLE_MAX_DEPTH 16
 
 struct dm_table {
@@ -173,6 +199,45 @@ struct dm_table {
 #endif
 };
 
+/*
+ * One of these is allocated per clone bio.
+ */
+#define DM_TIO_MAGIC 7282014
+struct dm_target_io {
+	unsigned int magic;
+	struct dm_io *io;
+	struct dm_target *ti;
+	unsigned int target_bio_nr;
+	unsigned int *len_ptr;
+	bool inside_dm_io;
+	struct bio clone;
+};
+
+/*
+ * One of these is allocated per original bio.
+ * It contains the first clone used for that original.
+ */
+#define DM_IO_MAGIC 5191977
+struct dm_io {
+	unsigned int magic;
+	struct mapped_device *md;
+	blk_status_t status;
+	atomic_t io_count;
+	struct bio *orig_bio;
+	unsigned long start_time;
+	spinlock_t endio_lock;
+	struct dm_stats_aux stats_aux;
+	/* last member of dm_target_io is 'struct bio' */
+	struct dm_target_io tio;
+};
+
+static inline void dm_io_inc_pending(struct dm_io *io)
+{
+	atomic_inc(&io->io_count);
+}
+
+void dm_io_dec_pending(struct dm_io *io, blk_status_t error);
+
 static inline struct completion *dm_get_completion_from_kobject(struct kobject *kobj)
 {
 	return &container_of(kobj, struct dm_kobject_holder, kobj)->completion;