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Commit 971f839a authored by Alex Elder's avatar Alex Elder
Browse files

rbd: move snap info out of rbd_mapping struct 



Moving the snap_id and snap_name fields into the separate
rbd_mapping structure was misguided.  (And in time, perhaps
we'll do away with that structure altogether...)

Move these fields back into struct rbd_device.

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent 86992098

drivers/block/rbd.c

+14 −14
Original line number Original line Diff line number Diff line
@@ -166,8 +166,6 @@ struct rbd_snap { 
};

};





struct rbd_mapping {

struct rbd_mapping {

	char                    *snap_name;

	u64                     snap_id;

	u64                     size;

	u64                     size;

	u64                     features;

	u64                     features;

	bool                    snap_exists;

	bool                    snap_exists;
@@ -199,6 +197,9 @@ struct rbd_device { 
	char			*pool_name;

	char			*pool_name;

	u64			pool_id;

	u64			pool_id;





	char                    *snap_name;

	u64                     snap_id;



	struct ceph_osd_event   *watch_event;

	struct ceph_osd_event   *watch_event;

	struct ceph_osd_request *watch_request;

	struct ceph_osd_request *watch_request;
@@ -669,7 +670,7 @@ static int snap_by_name(struct rbd_device *rbd_dev, const char *snap_name) 




	list_for_each_entry(snap, &rbd_dev->snaps, node) {

	list_for_each_entry(snap, &rbd_dev->snaps, node) {

		if (!strcmp(snap_name, snap->name)) {

		if (!strcmp(snap_name, snap->name)) {

			rbd_dev->mapping.snap_id = snap->id;

			rbd_dev->snap_id = snap->id;

			rbd_dev->mapping.size = snap->size;

			rbd_dev->mapping.size = snap->size;

			rbd_dev->mapping.features = snap->features;

			rbd_dev->mapping.features = snap->features;
@@ -686,7 +687,7 @@ static int rbd_dev_set_mapping(struct rbd_device *rbd_dev, char *snap_name) 




	if (!memcmp(snap_name, RBD_SNAP_HEAD_NAME,

	if (!memcmp(snap_name, RBD_SNAP_HEAD_NAME,

		    sizeof (RBD_SNAP_HEAD_NAME))) {

		    sizeof (RBD_SNAP_HEAD_NAME))) {

		rbd_dev->mapping.snap_id = CEPH_NOSNAP;

		rbd_dev->snap_id = CEPH_NOSNAP;

		rbd_dev->mapping.size = rbd_dev->header.image_size;

		rbd_dev->mapping.size = rbd_dev->header.image_size;

		rbd_dev->mapping.features = rbd_dev->header.features;

		rbd_dev->mapping.features = rbd_dev->header.features;

		rbd_dev->mapping.snap_exists = false;

		rbd_dev->mapping.snap_exists = false;
@@ -698,7 +699,7 @@ static int rbd_dev_set_mapping(struct rbd_device *rbd_dev, char *snap_name) 
		rbd_dev->mapping.snap_exists = true;

		rbd_dev->mapping.snap_exists = true;

		rbd_dev->mapping.read_only = true;

		rbd_dev->mapping.read_only = true;

	}

	}

	rbd_dev->mapping.snap_name = snap_name;

	rbd_dev->snap_name = snap_name;

done:

done:

	return ret;

	return ret;

}

}
@@ -1278,7 +1279,7 @@ static int rbd_do_op(struct request *rq, 
		opcode = CEPH_OSD_OP_READ;

		opcode = CEPH_OSD_OP_READ;

		flags = CEPH_OSD_FLAG_READ;

		flags = CEPH_OSD_FLAG_READ;

		snapc = NULL;

		snapc = NULL;

		snapid = rbd_dev->mapping.snap_id;

		snapid = rbd_dev->snap_id;

		payload_len = 0;

		payload_len = 0;

	}

	}
@@ -1561,7 +1562,7 @@ static void rbd_rq_fn(struct request_queue *q) 




		down_read(&rbd_dev->header_rwsem);

		down_read(&rbd_dev->header_rwsem);





		if (rbd_dev->mapping.snap_id != CEPH_NOSNAP &&

		if (rbd_dev->snap_id != CEPH_NOSNAP &&

				!rbd_dev->mapping.snap_exists) {

				!rbd_dev->mapping.snap_exists) {

			up_read(&rbd_dev->header_rwsem);

			up_read(&rbd_dev->header_rwsem);

			dout("request for non-existent snapshot");

			dout("request for non-existent snapshot");
@@ -1800,7 +1801,7 @@ static void rbd_update_mapping_size(struct rbd_device *rbd_dev) 
{

{

	sector_t size;

	sector_t size;





	if (rbd_dev->mapping.snap_id != CEPH_NOSNAP)

	if (rbd_dev->snap_id != CEPH_NOSNAP)

		return;

		return;





	size = (sector_t) rbd_dev->header.image_size / SECTOR_SIZE;

	size = (sector_t) rbd_dev->header.image_size / SECTOR_SIZE;
@@ -2011,7 +2012,7 @@ static ssize_t rbd_snap_show(struct device *dev, 
{

{

	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);

	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);





	return sprintf(buf, "%s\n", rbd_dev->mapping.snap_name);

	return sprintf(buf, "%s\n", rbd_dev->snap_name);

}

}





static ssize_t rbd_image_refresh(struct device *dev,

static ssize_t rbd_image_refresh(struct device *dev,
@@ -2567,12 +2568,11 @@ static int rbd_dev_snaps_update(struct rbd_device *rbd_dev) 




			/* Existing snapshot not in the new snap context */

			/* Existing snapshot not in the new snap context */





			if (rbd_dev->mapping.snap_id == snap->id)

			if (rbd_dev->snap_id == snap->id)

				rbd_dev->mapping.snap_exists = false;

				rbd_dev->mapping.snap_exists = false;

			rbd_remove_snap_dev(snap);

			rbd_remove_snap_dev(snap);

			dout("%ssnap id %llu has been removed\n",

			dout("%ssnap id %llu has been removed\n",

				rbd_dev->mapping.snap_id == snap->id ?

				rbd_dev->snap_id == snap->id ?  "mapped " : "",

								"mapped " : "",

				(unsigned long long) snap->id);

				(unsigned long long) snap->id);





			/* Done with this list entry; advance */

			/* Done with this list entry; advance */
@@ -3256,7 +3256,7 @@ static ssize_t rbd_add(struct bus_type *bus, 
	rbd_put_client(rbd_dev);

	rbd_put_client(rbd_dev);

	kfree(rbd_dev->image_id);

	kfree(rbd_dev->image_id);

err_out_args:

err_out_args:

	kfree(rbd_dev->mapping.snap_name);

	kfree(rbd_dev->snap_name);

	kfree(rbd_dev->image_name);

	kfree(rbd_dev->image_name);

	kfree(rbd_dev->pool_name);

	kfree(rbd_dev->pool_name);

err_out_mem:

err_out_mem:
@@ -3309,7 +3309,7 @@ static void rbd_dev_release(struct device *dev) 
	rbd_header_free(&rbd_dev->header);

	rbd_header_free(&rbd_dev->header);





	/* done with the id, and with the rbd_dev */

	/* done with the id, and with the rbd_dev */

	kfree(rbd_dev->mapping.snap_name);

	kfree(rbd_dev->snap_name);

	kfree(rbd_dev->image_id);

	kfree(rbd_dev->image_id);

	kfree(rbd_dev->header_name);

	kfree(rbd_dev->header_name);

	kfree(rbd_dev->pool_name);

	kfree(rbd_dev->pool_name);