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Commit 9d3997fd authored by Alex Elder's avatar Alex Elder
Browse files

rbd: don't pass rbd_dev to rbd_get_client() 



The only reason rbd_dev is passed to rbd_get_client() is so its
rbd_client field can get assigned.  Instead, just return the
rbd_client pointer as a result and have the caller do the
assignment.

Change rbd_put_client() so it takes an rbd_client structure,
so follows the more typical symmetry with rbd_get_client().

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent 859c31df

drivers/block/rbd.c

+15 −18
Original line number Diff line number Diff line
@@ -467,23 +467,17 @@ static int parse_rbd_opts_token(char *c, void *private) 
 * Get a ceph client with specific addr and configuration, if one does

 * not exist create it.

 */

static int rbd_get_client(struct rbd_device *rbd_dev,

				struct ceph_options *ceph_opts)

static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts)

{

	struct rbd_client *rbdc;



	rbdc = rbd_client_find(ceph_opts);

	if (rbdc) {

		/* using an existing client */

	if (rbdc)	/* using an existing client */

		ceph_destroy_options(ceph_opts);

	} else {

	else

		rbdc = rbd_client_create(ceph_opts);

		if (IS_ERR(rbdc))

			return PTR_ERR(rbdc);

	}

	rbd_dev->rbd_client = rbdc;



	return 0;

	return rbdc;

}



/*
@@ -508,10 +502,9 @@ static void rbd_client_release(struct kref *kref) 
 * Drop reference to ceph client node. If it's not referenced anymore, release

 * it.

 */

static void rbd_put_client(struct rbd_device *rbd_dev)

static void rbd_put_client(struct rbd_client *rbdc)

{

	kref_put(&rbd_dev->rbd_client->kref, rbd_client_release);

	rbd_dev->rbd_client = NULL;

	kref_put(&rbdc->kref, rbd_client_release);

}



/*
@@ -3232,6 +3225,7 @@ static ssize_t rbd_add(struct bus_type *bus, 
	struct ceph_options *ceph_opts = NULL;

	struct rbd_options *rbd_opts = NULL;

	struct rbd_spec *spec = NULL;

	struct rbd_client *rbdc;

	struct ceph_osd_client *osdc;

	int rc = -ENOMEM;
@@ -3255,13 +3249,16 @@ static ssize_t rbd_add(struct bus_type *bus, 


	rbd_dev->mapping.read_only = rbd_opts->read_only;



	rc = rbd_get_client(rbd_dev, ceph_opts);

	if (rc < 0)

	rbdc = rbd_get_client(ceph_opts);

	if (IS_ERR(rbdc)) {

		rc = PTR_ERR(rbdc);

		goto err_out_args;

	}

	rbd_dev->rbd_client = rbdc;

	ceph_opts = NULL;	/* ceph_opts now owned by rbd_dev client */



	/* pick the pool */

	osdc = &rbd_dev->rbd_client->client->osdc;

	osdc = &rbdc->client->osdc;

	rc = ceph_pg_poolid_by_name(osdc->osdmap, spec->pool_name);

	if (rc < 0)

		goto err_out_client;
@@ -3353,7 +3350,7 @@ err_out_probe: 
	rbd_header_free(&rbd_dev->header);

err_out_client:

	kfree(rbd_dev->header_name);

	rbd_put_client(rbd_dev);

	rbd_put_client(rbdc);

err_out_args:

	if (ceph_opts)

		ceph_destroy_options(ceph_opts);
@@ -3398,7 +3395,7 @@ static void rbd_dev_release(struct device *dev) 
	if (rbd_dev->watch_event)

		rbd_req_sync_unwatch(rbd_dev);



	rbd_put_client(rbd_dev);

	rbd_put_client(rbd_dev->rbd_client);



	/* clean up and free blkdev */

	rbd_free_disk(rbd_dev);