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rbd: pass and populate rbd_options structure 

Have the caller pass the address of an rbd_options structure to
rbd_add_parse_args(), to be initialized with the information
gleaned as a result of the parse.

I know, this is another near-reversal of a recent change...

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 819d52bf72
commit 4e9afeba7a
1 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/block/rbd.c
View File

@ -2842,15 +2842,16 @@ 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)
const char *buf,
struct rbd_options **opts)
{
size_t len;
const char *mon_addrs;
size_t mon_addrs_size;
char *options;
struct ceph_options *err_ptr = ERR_PTR(-EINVAL);
struct rbd_options rbd_opts;
struct ceph_options *ceph_opts;
struct rbd_options *rbd_opts = NULL;
/* The first four tokens are required */
@ -2899,17 +2900,17 @@ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev,
/* Initialize all rbd options to the defaults */
rbd_opts.read_only = RBD_READ_ONLY_DEFAULT;
rbd_opts = kzalloc(sizeof (*rbd_opts), GFP_KERNEL);
if (!rbd_opts)
goto out_mem;
rbd_opts->read_only = RBD_READ_ONLY_DEFAULT;
ceph_opts = ceph_parse_options(options, mon_addrs,
mon_addrs + mon_addrs_size - 1,
parse_rbd_opts_token, &rbd_opts);
parse_rbd_opts_token, rbd_opts);
kfree(options);
/* Record the parsed rbd options */
if (!IS_ERR(ceph_opts))
rbd_dev->mapping.read_only = rbd_opts.read_only;
*opts = rbd_opts;
return ceph_opts;
out_mem:
@ -3131,6 +3132,7 @@ static ssize_t rbd_add(struct bus_type *bus,
{
struct rbd_device *rbd_dev = NULL;
struct ceph_options *ceph_opts;
struct rbd_options *rbd_opts = NULL;
struct ceph_osd_client *osdc;
int rc = -ENOMEM;
@ -3139,7 +3141,7 @@ static ssize_t rbd_add(struct bus_type *bus,
rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL);
if (!rbd_dev)
goto err_out_mem;
return -ENOMEM;
/* static rbd_device initialization */
spin_lock_init(&rbd_dev->lock);
@ -3148,11 +3150,12 @@ 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);
ceph_opts = rbd_add_parse_args(rbd_dev, buf, &rbd_opts);
if (IS_ERR(ceph_opts)) {
rc = PTR_ERR(ceph_opts);
goto err_out_mem;
}
rbd_dev->mapping.read_only = rbd_opts->read_only;
rc = rbd_get_client(rbd_dev, ceph_opts);
if (rc < 0)
@ -3219,6 +3222,8 @@ static ssize_t rbd_add(struct bus_type *bus,
if (rc)
goto err_out_bus;
kfree(rbd_opts);
/* Everything's ready. Announce the disk to the world. */
add_disk(rbd_dev->disk);
@ -3232,6 +3237,8 @@ err_out_bus:
/* this will also clean up rest of rbd_dev stuff */
rbd_bus_del_dev(rbd_dev);
kfree(rbd_opts);
return rc;
err_out_disk:
@ -3254,6 +3261,7 @@ err_out_args:
kfree(rbd_dev->snap_name);
kfree(rbd_dev->image_name);
kfree(rbd_dev->pool_name);
kfree(rbd_opts);
err_out_mem:
kfree(rbd_dev);