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

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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: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2012-07-26 23:37:14 -05:00
parent d78fd7ae03
commit d2bb24e506
1 changed files with 15 additions and 13 deletions
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28
drivers/block/rbd.c
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@ -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;