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Commit 67e2b652 authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

rbd: set offset and length outside of rbd_obj_request_create() 



The allocation doesn't depend on offset and length.  Both offset and
length can be changed after obj_request is allocated, too.

Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
Reviewed-by: default avatarJason Dillaman <dillaman@redhat.com>
parent 7e97332e

drivers/block/rbd.c

+11 −15
Original line number Diff line number Diff line
@@ -1631,7 +1631,9 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) 
{

	struct ceph_osd_request *osd_req = obj_request->osd_req;



	dout("%s %p osd_req %p\n", __func__, obj_request, osd_req);

	dout("%s %p \"%s\" %llu~%llu osd_req %p\n", __func__,

	     obj_request, obj_request->object_name, obj_request->offset,

	     obj_request->length, osd_req);

	if (obj_request_img_data_test(obj_request)) {

		WARN_ON(obj_request->callback != rbd_img_obj_callback);

		rbd_img_request_get(obj_request->img_request);
@@ -2073,7 +2075,6 @@ static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req) 
/* object_name is assumed to be a non-null pointer and NUL-terminated */



static struct rbd_obj_request *rbd_obj_request_create(const char *object_name,

						u64 offset, u64 length,

						enum obj_request_type type)

{

	struct rbd_obj_request *obj_request;
@@ -2094,18 +2095,13 @@ static struct rbd_obj_request *rbd_obj_request_create(const char *object_name, 
	}



	obj_request->object_name = memcpy(name, object_name, size);

	obj_request->offset = offset;

	obj_request->length = length;

	obj_request->flags = 0;

	obj_request->which = BAD_WHICH;

	obj_request->type = type;

	INIT_LIST_HEAD(&obj_request->links);

	init_completion(&obj_request->completion);

	kref_init(&obj_request->kref);



	dout("%s: \"%s\" %llu/%llu %d -> obj %p\n", __func__, object_name,

		offset, length, (int)type, obj_request);



	dout("%s %p\n", __func__, obj_request);

	return obj_request;

}
@@ -2517,21 +2513,21 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, 
	while (resid) {

		struct ceph_osd_request *osd_req;

		const char *object_name;

		u64 offset;

		u64 length;

		u64 offset = rbd_segment_offset(rbd_dev, img_offset);

		u64 length = rbd_segment_length(rbd_dev, img_offset, resid);



		object_name = rbd_segment_name(rbd_dev, img_offset);

		if (!object_name)

			goto out_unwind;

		offset = rbd_segment_offset(rbd_dev, img_offset);

		length = rbd_segment_length(rbd_dev, img_offset, resid);

		obj_request = rbd_obj_request_create(object_name,

						offset, length, type);

		obj_request = rbd_obj_request_create(object_name, type);

		/* object request has its own copy of the object name */

		rbd_segment_name_free(object_name);

		if (!obj_request)

			goto out_unwind;



		obj_request->offset = offset;

		obj_request->length = length;



		/*

		 * set obj_request->img_request before creating the

		 * osd_request so that it gets the right snapc
@@ -2870,7 +2866,7 @@ static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request) 
	size_t size;

	int ret;



	stat_request = rbd_obj_request_create(obj_request->object_name, 0, 0,

	stat_request = rbd_obj_request_create(obj_request->object_name,

					      OBJ_REQUEST_PAGES);

	if (!stat_request)

		return -ENOMEM;