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Commit b314a90d authored by Sage Weil's avatar Sage Weil
Browse files

ceph: fix fallocate division 



We need to use do_div to divide by a 64-bit value.

Signed-off-by: default avatarSage Weil <sage@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent ad7a60de

fs/ceph/file.c

+10 −6
Original line number Diff line number Diff line
@@ -960,13 +960,17 @@ static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) 
{

	int ret = 0;

	struct ceph_inode_info *ci = ceph_inode(inode);

	__s32 stripe_unit = ceph_file_layout_su(ci->i_layout);

	__s32 stripe_count = ceph_file_layout_stripe_count(ci->i_layout);

	__s32 object_size = ceph_file_layout_object_size(ci->i_layout);

	loff_t object_set_size = (loff_t)object_size * stripe_count;

	s32 stripe_unit = ceph_file_layout_su(ci->i_layout);

	s32 stripe_count = ceph_file_layout_stripe_count(ci->i_layout);

	s32 object_size = ceph_file_layout_object_size(ci->i_layout);

	u64 object_set_size = object_size * stripe_count;

	u64 nearly, t;



	/* round offset up to next period boundary */

	nearly = offset + object_set_size - 1;

	t = nearly;

	nearly -= do_div(t, object_set_size);



	loff_t nearly = (offset + object_set_size - 1)

			/ object_set_size * object_set_size;

	while (length && offset < nearly) {

		loff_t size = length;

		ret = ceph_zero_partial_object(inode, offset, &size);