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rbd: kill rbd_spec->image_name_len 

There may have been a benefit to hanging on to the length of an
image name before, but there is really none now.  The only time it's
used is when probing for rbd images, so we can just compute the
length then.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: David Zafman <david.zafman@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2012-11-01 08:39:26 -05:00 committed by Alex Elder
parent c66c6e0c0b
commit 69e7a02f63
1 changed files with 8 additions and 11 deletions
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19
drivers/block/rbd.c
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@ -147,7 +147,6 @@ struct rbd_spec {
char *image_id;
size_t image_id_len;
char *image_name;
size_t image_name_len;
u64 snap_id;
char *snap_name;
@ -2563,15 +2562,15 @@ static char *rbd_dev_image_name(struct rbd_device *rbd_dev)
rbd_assert(!rbd_dev->spec->image_name);
image_id_size = sizeof (__le32) + rbd_dev->spec->image_id_len;
len = strlen(rbd_dev->spec->image_id);
image_id_size = sizeof (__le32) + len;
image_id = kmalloc(image_id_size, GFP_KERNEL);
if (!image_id)
return NULL;
p = image_id;
end = (char *) image_id + image_id_size;
ceph_encode_string(&p, end, rbd_dev->spec->image_id,
(u32) rbd_dev->spec->image_id_len);
ceph_encode_string(&p, end, rbd_dev->spec->image_id, (u32) len);
size = sizeof (__le32) + RBD_IMAGE_NAME_LEN_MAX;
reply_buf = kmalloc(size, GFP_KERNEL);
@ -2631,14 +2630,12 @@ static int rbd_dev_probe_update_spec(struct rbd_device *rbd_dev)
/* Fetch the image name; tolerate failure here */
name = rbd_dev_image_name(rbd_dev);
if (name) {
rbd_dev->spec->image_name_len = strlen(name);
if (name)
rbd_dev->spec->image_name = (char *) name;
} else {
else
pr_warning(RBD_DRV_NAME "%d "
"unable to get image name for image id %s\n",
rbd_dev->major, rbd_dev->spec->image_id);
}
/* Look up the snapshot name. */
@ -3252,7 +3249,7 @@ static int rbd_add_parse_args(const char *buf,
if (!*spec->pool_name)
goto out_err; /* Missing pool name */
spec->image_name = dup_token(&buf, &spec->image_name_len);
spec->image_name = dup_token(&buf, NULL);
if (!spec->image_name)
goto out_mem;
if (!*spec->image_name)
@ -3342,7 +3339,7 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev)
* First, see if the format 2 image id file exists, and if
* so, get the image's persistent id from it.
*/
size = sizeof (RBD_ID_PREFIX) + rbd_dev->spec->image_name_len;
size = sizeof (RBD_ID_PREFIX) + strlen(rbd_dev->spec->image_name);
object_name = kmalloc(size, GFP_NOIO);
if (!object_name)
return -ENOMEM;
@ -3400,7 +3397,7 @@ static int rbd_dev_v1_probe(struct rbd_device *rbd_dev)
/* Record the header object name for this rbd image. */
size = rbd_dev->spec->image_name_len + sizeof (RBD_SUFFIX);
size = strlen(rbd_dev->spec->image_name) + sizeof (RBD_SUFFIX);
rbd_dev->header_name = kmalloc(size, GFP_KERNEL);
if (!rbd_dev->header_name) {
ret = -ENOMEM;