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rbd: remove snap_name arg from rbd_add_parse_args()

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The snapshot name returned by rbd_add_parse_args() just gets saved
in the rbd_dev eventually.  So just do that inside that function and
do away with the snap_name argument, both in rbd_add_parse_args()
and rbd_dev_set_mapping().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2012-10-25 23:34:41 -05:00
parent f28e565a1b
commit 819d52bf72
1 changed files with 10 additions and 13 deletions
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23
drivers/block/rbd.c
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@ -665,23 +665,22 @@ static int snap_by_name(struct rbd_device *rbd_dev, const char *snap_name)
return -ENOENT;
}
static int rbd_dev_set_mapping(struct rbd_device *rbd_dev, char *snap_name)
static int rbd_dev_set_mapping(struct rbd_device *rbd_dev)
{
int ret;
if (!memcmp(snap_name, RBD_SNAP_HEAD_NAME,
if (!memcmp(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME,
sizeof (RBD_SNAP_HEAD_NAME))) {
rbd_dev->snap_id = CEPH_NOSNAP;
rbd_dev->mapping.size = rbd_dev->header.image_size;
rbd_dev->mapping.features = rbd_dev->header.features;
ret = 0;
} else {
ret = snap_by_name(rbd_dev, snap_name);
ret = snap_by_name(rbd_dev, rbd_dev->snap_name);
if (ret < 0)
goto done;
rbd_dev->mapping.read_only = true;
}
rbd_dev->snap_name = snap_name;
rbd_dev->exists = true;
done:
return ret;
@ -2843,8 +2842,7 @@ static inline char *dup_token(const char **buf, size_t *lenp)
* Note: rbd_dev is assumed to have been initially zero-filled.
*/
static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev,
const char *buf,
char **snap_name)
const char *buf)
{
size_t len;
const char *mon_addrs;
@ -2893,11 +2891,11 @@ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev,
err_ptr = ERR_PTR(-ENAMETOOLONG);
goto out_err;
}
*snap_name = kmalloc(len + 1, GFP_KERNEL);
if (!*snap_name)
rbd_dev->snap_name = kmalloc(len + 1, GFP_KERNEL);
if (!rbd_dev->snap_name)
goto out_mem;
memcpy(*snap_name, buf, len);
*(*snap_name + len) = '\0';
memcpy(rbd_dev->snap_name, buf, len);
*(rbd_dev->snap_name + len) = '\0';
/* Initialize all rbd options to the defaults */
@ -3132,7 +3130,6 @@ static ssize_t rbd_add(struct bus_type *bus,
size_t count)
{
struct rbd_device *rbd_dev = NULL;
char *snap_name;
struct ceph_options *ceph_opts;
struct ceph_osd_client *osdc;
int rc = -ENOMEM;
@ -3151,7 +3148,7 @@ static ssize_t rbd_add(struct bus_type *bus,
init_rwsem(&rbd_dev->header_rwsem);
/* parse add command */
ceph_opts = rbd_add_parse_args(rbd_dev, buf, &snap_name);
ceph_opts = rbd_add_parse_args(rbd_dev, buf);
if (IS_ERR(ceph_opts)) {
rc = PTR_ERR(ceph_opts);
goto err_out_mem;
@ -3178,7 +3175,7 @@ static ssize_t rbd_add(struct bus_type *bus,
if (rc)
goto err_out_probe;
rc = rbd_dev_set_mapping(rbd_dev, snap_name);
rc = rbd_dev_set_mapping(rbd_dev);
if (rc)
goto err_out_snaps;