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rbd: define rbd_header_name()

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Define a new function rbd_header_name(), which allocates and formats
the name of the header object for the rbd device.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-27 09:59:30 -05:00 committed by Sage Weil
parent 9bb81c9be9
commit 332bb12db9
1 changed files with 38 additions and 28 deletions
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66
drivers/block/rbd.c
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@ -4592,18 +4592,6 @@ out:
static int rbd_dev_v1_probe(struct rbd_device *rbd_dev)
{
int ret;
size_t size;
/* Record the header object name for this rbd image. */
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;
goto out_err;
}
sprintf(rbd_dev->header_name, "%s%s",
rbd_dev->spec->image_name, RBD_SUFFIX);
/* Populate rbd image metadata */
@ -4632,22 +4620,9 @@ out_err:
static int rbd_dev_v2_probe(struct rbd_device *rbd_dev)
{
size_t size;
int ret;
u64 ver = 0;
/*
* Image id was filled in by the caller. Record the header
* object name for this rbd image.
*/
size = sizeof (RBD_HEADER_PREFIX) + strlen(rbd_dev->spec->image_id);
rbd_dev->header_name = kmalloc(size, GFP_KERNEL);
if (!rbd_dev->header_name)
return -ENOMEM;
sprintf(rbd_dev->header_name, "%s%s",
RBD_HEADER_PREFIX, rbd_dev->spec->image_id);
/* Get the size and object order for the image */
ret = rbd_dev_v2_image_size(rbd_dev);
if (ret)
goto out_err;
@ -4810,6 +4785,33 @@ err_out_id:
return ret;
}
static int rbd_dev_header_name(struct rbd_device *rbd_dev)
{
struct rbd_spec *spec = rbd_dev->spec;
size_t size;
/* Record the header object name for this rbd image. */
rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
if (rbd_dev->image_format == 1)
size = strlen(spec->image_name) + sizeof (RBD_SUFFIX);
else
size = sizeof (RBD_HEADER_PREFIX) + strlen(spec->image_id);
rbd_dev->header_name = kmalloc(size, GFP_KERNEL);
if (!rbd_dev->header_name)
return -ENOMEM;
if (rbd_dev->image_format == 1)
sprintf(rbd_dev->header_name, "%s%s",
spec->image_name, RBD_SUFFIX);
else
sprintf(rbd_dev->header_name, "%s%s",
RBD_HEADER_PREFIX, spec->image_id);
return 0;
}
/*
* Probe for the existence of the header object for the given rbd
* device. For format 2 images this includes determining the image
@ -4830,16 +4832,20 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev)
rbd_assert(rbd_dev->spec->image_id);
rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
ret = rbd_dev_header_name(rbd_dev);
if (ret)
goto err_out_format;
if (rbd_dev->image_format == 1)
ret = rbd_dev_v1_probe(rbd_dev);
else
ret = rbd_dev_v2_probe(rbd_dev);
if (ret)
goto out_err;
goto out_header_name;
ret = rbd_dev_snaps_update(rbd_dev);
if (ret)
goto out_err;
goto out_header_name;
ret = rbd_dev_spec_update(rbd_dev);
if (ret)
@ -4859,7 +4865,11 @@ err_out_parent:
rbd_header_free(&rbd_dev->header);
err_out_snaps:
rbd_remove_all_snaps(rbd_dev);
out_err:
out_header_name:
kfree(rbd_dev->header_name);
rbd_dev->header_name = NULL;
err_out_format:
rbd_dev->image_format = 0;
kfree(rbd_dev->spec->image_id);
rbd_dev->spec->image_id = NULL;