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Commit 332bb12d authored by Alex Elder's avatar Alex Elder Committed by Sage Weil
Browse files

rbd: define rbd_header_name() 



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

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent 9bb81c9b

drivers/block/rbd.c

+38 −28
Original line number Diff line number Diff line
@@ -4592,18 +4592,6 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev) 
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 @@ static int rbd_dev_v1_probe(struct rbd_device *rbd_dev) 


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 @@ static int rbd_dev_probe_finish(struct rbd_device *rbd_dev) 
	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 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev) 
	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;