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Commit d2bb24e5 authored by Alex Elder's avatar Alex Elder
Browse files

rbd: use sizeof (object) instead of sizeof (type) 



Fix a few spots in rbd_header_from_disk() to use sizeof (object)
rather than sizeof (type).  Use a local variable to record sizes
to shorten some lines and improve readability.

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent d78fd7ae

drivers/block/rbd.c

+15 −13
Original line number Diff line number Diff line
@@ -494,17 +494,21 @@ static int rbd_header_from_disk(struct rbd_image_header *header, 
				 u32 allocated_snaps)

{

	u32 snap_count;

	size_t size;



	if (!rbd_dev_ondisk_valid(ondisk))

		return -ENXIO;



	snap_count = le32_to_cpu(ondisk->snap_count);

	if (snap_count > (SIZE_MAX - sizeof(struct ceph_snap_context))

				 / sizeof (u64))



	/* Make sure we don't overflow below */

	size = SIZE_MAX - sizeof (struct ceph_snap_context);

	if (snap_count > size / sizeof (header->snapc->snaps[0]))

		return -EINVAL;

	header->snapc = kmalloc(sizeof(struct ceph_snap_context) +

				snap_count * sizeof(u64),

				GFP_KERNEL);



	size = sizeof (struct ceph_snap_context);

	size += snap_count * sizeof (header->snapc->snaps[0]);

	header->snapc = kmalloc(size, GFP_KERNEL);

	if (!header->snapc)

		return -ENOMEM;
@@ -515,8 +519,8 @@ static int rbd_header_from_disk(struct rbd_image_header *header, 
					     GFP_KERNEL);

		if (!header->snap_names)

			goto err_snapc;

		header->snap_sizes = kmalloc(snap_count * sizeof(u64),

					     GFP_KERNEL);

		size = snap_count * sizeof (*header->snap_sizes);

		header->snap_sizes = kmalloc(size, GFP_KERNEL);

		if (!header->snap_sizes)

			goto err_names;

	} else {
@@ -526,14 +530,12 @@ static int rbd_header_from_disk(struct rbd_image_header *header, 
		header->snap_sizes = NULL;

	}



	header->object_prefix = kmalloc(sizeof (ondisk->block_name) + 1,

					GFP_KERNEL);

	size = sizeof (ondisk->block_name) + 1;

	header->object_prefix = kmalloc(size, GFP_KERNEL);

	if (!header->object_prefix)

		goto err_sizes;



	memcpy(header->object_prefix, ondisk->block_name,

	       sizeof(ondisk->block_name));

	header->object_prefix[sizeof (ondisk->block_name)] = '\0';

	memcpy(header->object_prefix, ondisk->block_name, size - 1);

	header->object_prefix[size - 1] = '\0';



	header->image_size = le64_to_cpu(ondisk->image_size);

	header->obj_order = ondisk->options.order;