rbd: change rbd_obj_request_submit() signature

- osdc parameter is useless
- starting with commit 5aea3dcd50 ("libceph: a major OSD client
  update"), ceph_osdc_start_request() always returns success

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>

drivers/block/rbd.c

@@ -1618,11 +1618,12 @@ static bool obj_request_type_valid(enum obj_request_type type)
 	}
 }
 
-static int rbd_obj_request_submit(struct ceph_osd_client *osdc,
-				struct rbd_obj_request *obj_request)
+static void rbd_obj_request_submit(struct rbd_obj_request *obj_request)
 {
-	dout("%s %p\n", __func__, obj_request);
-	return ceph_osdc_start_request(osdc, obj_request->osd_req, false);
+	struct ceph_osd_request *osd_req = obj_request->osd_req;
+
+	dout("%s %p osd_req %p\n", __func__, obj_request, osd_req);
+	ceph_osdc_start_request(osd_req->r_osdc, osd_req, false);
 }
 
 static void rbd_obj_request_end(struct rbd_obj_request *obj_request)
@@ -2646,7 +2647,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
 {
 	struct rbd_obj_request *orig_request;
 	struct ceph_osd_request *osd_req;
-	struct ceph_osd_client *osdc;
 	struct rbd_device *rbd_dev;
 	struct page **pages;
 	enum obj_operation_type op_type;
@@ -2683,13 +2683,9 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
 	 * and re-submit the original write request.
 	 */
 	if (!rbd_dev->parent_overlap) {
-		struct ceph_osd_client *osdc;
-
 		ceph_release_page_vector(pages, page_count);
-		osdc = &rbd_dev->rbd_client->client->osdc;
-		img_result = rbd_obj_request_submit(osdc, orig_request);
-		if (!img_result)
-			return;
+		rbd_obj_request_submit(orig_request);
+		return;
 	}
 
 	if (img_result)
@@ -2723,10 +2719,9 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
 
 	/* All set, send it off. */
 
-	osdc = &rbd_dev->rbd_client->client->osdc;
-	img_result = rbd_obj_request_submit(osdc, orig_request);
-	if (!img_result)
-		return;
+	rbd_obj_request_submit(orig_request);
+	return;
+
 out_err:
 	/* Record the error code and complete the request */
 
@@ -2860,17 +2855,13 @@ static void rbd_img_obj_exists_callback(struct rbd_obj_request *obj_request)
 
 	/*
 	 * If the overlap has become 0 (most likely because the
-	 * image has been flattened) we need to free the pages
-	 * and re-submit the original write request.
+	 * image has been flattened) we need to re-submit the
+	 * original request.
 	 */
 	rbd_dev = orig_request->img_request->rbd_dev;
 	if (!rbd_dev->parent_overlap) {
-		struct ceph_osd_client *osdc;
-
-		osdc = &rbd_dev->rbd_client->client->osdc;
-		result = rbd_obj_request_submit(osdc, orig_request);
-		if (!result)
-			return;
+		rbd_obj_request_submit(orig_request);
+		return;
 	}
 
 	/*
@@ -2902,7 +2893,6 @@ static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request)
 {
 	struct rbd_obj_request *stat_request;
 	struct rbd_device *rbd_dev;
-	struct ceph_osd_client *osdc;
 	struct page **pages = NULL;
 	u32 page_count;
 	size_t size;
@@ -2946,8 +2936,9 @@ static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request)
 					false, false);
 	rbd_osd_req_format_read(stat_request);
 
-	osdc = &rbd_dev->rbd_client->client->osdc;
-	ret = rbd_obj_request_submit(osdc, stat_request);
+	rbd_obj_request_submit(stat_request);
+	return 0;
+
 out:
 	if (ret)
 		rbd_obj_request_put(obj_request);
@@ -3004,13 +2995,8 @@ static bool img_obj_request_simple(struct rbd_obj_request *obj_request)
 static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request)
 {
 	if (img_obj_request_simple(obj_request)) {
-		struct rbd_device *rbd_dev;
-		struct ceph_osd_client *osdc;
-
-		rbd_dev = obj_request->img_request->rbd_dev;
-		osdc = &rbd_dev->rbd_client->client->osdc;
-
-		return rbd_obj_request_submit(osdc, obj_request);
+		rbd_obj_request_submit(obj_request);
+		return 0;
 	}
 
 	/*
@@ -3073,12 +3059,8 @@ static void rbd_img_parent_read_callback(struct rbd_img_request *img_request)
 	rbd_assert(obj_request->img_request);
 	rbd_dev = obj_request->img_request->rbd_dev;
 	if (!rbd_dev->parent_overlap) {
-		struct ceph_osd_client *osdc;
-
-		osdc = &rbd_dev->rbd_client->client->osdc;
-		img_result = rbd_obj_request_submit(osdc, obj_request);
-		if (!img_result)
-			return;
+		rbd_obj_request_submit(obj_request);
+		return;
 	}
 
 	obj_request->result = img_result;
@@ -4005,7 +3987,6 @@ static int rbd_obj_method_sync(struct rbd_device *rbd_dev,
 			     void *inbound,
 			     size_t inbound_size)
 {
-	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
 	struct rbd_obj_request *obj_request;
 	struct page **pages;
 	u32 page_count;
@@ -4056,9 +4037,7 @@ static int rbd_obj_method_sync(struct rbd_device *rbd_dev,
 					0, false, false);
 	rbd_osd_req_format_read(obj_request);
 
-	ret = rbd_obj_request_submit(osdc, obj_request);
-	if (ret)
-		goto out;
+	rbd_obj_request_submit(obj_request);
 	ret = rbd_obj_request_wait(obj_request);
 	if (ret)
 		goto out;
@@ -4266,7 +4245,6 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev,
 				u64 offset, u64 length, void *buf)
 
 {
-	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
 	struct rbd_obj_request *obj_request;
 	struct page **pages = NULL;
 	u32 page_count;
@@ -4301,9 +4279,7 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev,
 					false, false);
 	rbd_osd_req_format_read(obj_request);
 
-	ret = rbd_obj_request_submit(osdc, obj_request);
-	if (ret)
-		goto out;
+	rbd_obj_request_submit(obj_request);
 	ret = rbd_obj_request_wait(obj_request);
 	if (ret)
 		goto out;