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rbd: have rbd_parse_args() report found mon_addrs size

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The argument parsing routine already computes the size of the
mon_addrs buffer it extracts from the "command."  Pass it to the
caller so it can use it to provide the length to rbd_get_client().

Signed-off-by: Alex Elder <elder@dreamhost.com>
This commit is contained in:
Alex Elder 2012-02-02 08:13:30 -06:00
parent 81a8979378
commit 5214ecc45c
1 changed files with 13 additions and 7 deletions
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20
drivers/block/rbd.c
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@ -391,7 +391,9 @@ 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 struct rbd_client *rbd_get_client(const char *mon_addr, char *options)
static struct rbd_client *rbd_get_client(const char *mon_addr,
size_t mon_addr_len,
char *options)
{
struct rbd_client *rbdc;
struct ceph_options *opt;
@ -404,7 +406,7 @@ static struct rbd_client *rbd_get_client(const char *mon_addr, char *options)
rbd_opts->notify_timeout = RBD_NOTIFY_TIMEOUT_DEFAULT;
opt = ceph_parse_options(options, mon_addr,
mon_addr + strlen(mon_addr),
mon_addr + mon_addr_len,
parse_rbd_opts_token, rbd_opts);
if (IS_ERR(opt)) {
kfree(rbd_opts);
@ -2283,7 +2285,7 @@ static inline size_t copy_token(const char **buf,
static int rbd_add_parse_args(struct rbd_device *rbd_dev,
const char *buf,
char *mon_addrs,
size_t mon_addrs_size,
size_t *mon_addrs_size,
char *options,
size_t options_size)
{
@ -2291,9 +2293,10 @@ static int rbd_add_parse_args(struct rbd_device *rbd_dev,
/* The first four tokens are required */
len = copy_token(&buf, mon_addrs, mon_addrs_size);
if (!len || len >= mon_addrs_size)
len = copy_token(&buf, mon_addrs, *mon_addrs_size);
if (!len || len >= *mon_addrs_size)
return -EINVAL;
*mon_addrs_size = len + 1;
len = copy_token(&buf, options, options_size);
if (!len || len >= options_size)
@ -2335,6 +2338,7 @@ static ssize_t rbd_add(struct bus_type *bus,
{
struct rbd_device *rbd_dev;
char *mon_addrs = NULL;
size_t mon_addrs_size;
char *options = NULL;
struct ceph_osd_client *osdc;
int rc = -ENOMEM;
@ -2368,12 +2372,14 @@ static ssize_t rbd_add(struct bus_type *bus,
sprintf(rbd_dev->name, "%s%d", RBD_DRV_NAME, rbd_dev->id);
/* parse add command */
rc = rbd_add_parse_args(rbd_dev, buf, mon_addrs, count,
mon_addrs_size = count;
rc = rbd_add_parse_args(rbd_dev, buf, mon_addrs, &mon_addrs_size,
options, count);
if (rc)
goto err_put_id;
rbd_dev->rbd_client = rbd_get_client(mon_addrs, options);
rbd_dev->rbd_client = rbd_get_client(mon_addrs, mon_addrs_size - 1,
options);
if (IS_ERR(rbd_dev->rbd_client)) {
rc = PTR_ERR(rbd_dev->rbd_client);
goto err_put_id;