diff options
| author |   Alex Elder <elder@dreamhost.com> | 2012-02-02 08:13:30 -0600 |
|---|---|---|
| committer | Alex Elder <elder@dreamhost.com> | 2012-03-22 10:47:49 -0500 |
| commit | 5214ecc45cf9b9f1365b189bcb63e441e3865334 (patch) | |
| tree | 68e7ca8cb6e3e1698e788d35dcbe16320bdbb3ea /drivers/block | |
| parent | rbd: do a few checks at build time (diff) | |
| download | linux-dev-5214ecc45cf9b9f1365b189bcb63e441e3865334.tar.xz linux-dev-5214ecc45cf9b9f1365b189bcb63e441e3865334.zip | |
rbd: have rbd_parse_args() report found mon_addrs size
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>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 14d0a3c9f96a..2f2d194ca3d4 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -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; |