dm bufio: Add flags argument to dm_bufio_client_create

Add a flags argument to dm_bufio_client_create and update all the
callers. This is in preparation to add the DM_BUFIO_NO_SLEEP flag.
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

drivers/md/dm-bufio.c

@@ -1717,7 +1717,8 @@ static unsigned long dm_bufio_shrink_count(struct shrinker *shrink, struct shrin
 struct dm_bufio_client *dm_bufio_client_create(struct block_device *bdev, unsigned block_size,
 					       unsigned reserved_buffers, unsigned aux_size,
 					       void (*alloc_callback)(struct dm_buffer *),
-					       void (*write_callback)(struct dm_buffer *))
+					       void (*write_callback)(struct dm_buffer *),
+					       unsigned int flags)
 {
 	int r;
 	struct dm_bufio_client *c;

drivers/md/dm-ebs-target.c

@@ -312,7 +312,8 @@ static int ebs_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 		goto bad;
 	}
 
-	ec->bufio = dm_bufio_client_create(ec->dev->bdev, to_bytes(ec->u_bs), 1, 0, NULL, NULL);
+	ec->bufio = dm_bufio_client_create(ec->dev->bdev, to_bytes(ec->u_bs), 1,
+					   0, NULL, NULL, 0);
 	if (IS_ERR(ec->bufio)) {
 		ti->error = "Cannot create dm bufio client";
 		r = PTR_ERR(ec->bufio);

drivers/md/dm-integrity.c

@@ -4439,7 +4439,7 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
 	}
 
 	ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,
-			1U << (SECTOR_SHIFT + ic->log2_buffer_sectors), 1, 0, NULL, NULL);
+			1U << (SECTOR_SHIFT + ic->log2_buffer_sectors), 1, 0, NULL, NULL, 0);
 	if (IS_ERR(ic->bufio)) {
 		r = PTR_ERR(ic->bufio);
 		ti->error = "Cannot initialize dm-bufio";

drivers/md/dm-snap-persistent.c

@@ -494,7 +494,7 @@ static int read_exceptions(struct pstore *ps,
 
 	client = dm_bufio_client_create(dm_snap_cow(ps->store->snap)->bdev,
 					ps->store->chunk_size << SECTOR_SHIFT,
-					1, 0, NULL, NULL);
+					1, 0, NULL, NULL, 0);
 
 	if (IS_ERR(client))
 		return PTR_ERR(client);

drivers/md/dm-verity-fec.c

@@ -749,7 +749,7 @@ int verity_fec_ctr(struct dm_verity *v)
 
 	f->bufio = dm_bufio_client_create(f->dev->bdev,
 					  f->io_size,
-					  1, 0, NULL, NULL);
+					  1, 0, NULL, NULL, 0);
 	if (IS_ERR(f->bufio)) {
 		ti->error = "Cannot initialize FEC bufio client";
 		return PTR_ERR(f->bufio);
@@ -765,7 +765,7 @@ int verity_fec_ctr(struct dm_verity *v)
 
 	f->data_bufio = dm_bufio_client_create(v->data_dev->bdev,
 					       1 << v->data_dev_block_bits,
-					       1, 0, NULL, NULL);
+					       1, 0, NULL, NULL, 0);
 	if (IS_ERR(f->data_bufio)) {
 		ti->error = "Cannot initialize FEC data bufio client";
 		return PTR_ERR(f->data_bufio);

drivers/md/dm-verity-target.c

@@ -1265,7 +1265,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
 
 	v->bufio = dm_bufio_client_create(v->hash_dev->bdev,
 		1 << v->hash_dev_block_bits, 1, sizeof(struct buffer_aux),
-		dm_bufio_alloc_callback, NULL);
+		dm_bufio_alloc_callback, NULL, 0);
 	if (IS_ERR(v->bufio)) {
 		ti->error = "Cannot initialize dm-bufio";
 		r = PTR_ERR(v->bufio);

drivers/md/persistent-data/dm-block-manager.c

@@ -391,7 +391,8 @@ struct dm_block_manager *dm_block_manager_create(struct block_device *bdev,
 	bm->bufio = dm_bufio_client_create(bdev, block_size, max_held_per_thread,
 					   sizeof(struct buffer_aux),
 					   dm_block_manager_alloc_callback,
-					   dm_block_manager_write_callback);
+					   dm_block_manager_write_callback,
+					   0);
 	if (IS_ERR(bm->bufio)) {
 		r = PTR_ERR(bm->bufio);
 		kfree(bm);

include/linux/dm-bufio.h

@@ -24,7 +24,8 @@ struct dm_bufio_client *
 dm_bufio_client_create(struct block_device *bdev, unsigned block_size,
 		       unsigned reserved_buffers, unsigned aux_size,
 		       void (*alloc_callback)(struct dm_buffer *),
-		       void (*write_callback)(struct dm_buffer *));
+		       void (*write_callback)(struct dm_buffer *),
+		       unsigned int flags);
 
 /*
  * Release a buffered IO cache.