Commit fe2ed425 authored Jan 12, 2017 by Jeff Layton Committed by Ilya Dryomov Jan 18, 2017

ceph: fix endianness bug in frag_tree_split_cmp



sparse says:

    fs/ceph/inode.c:308:36: warning: incorrect type in argument 1 (different base types)
    fs/ceph/inode.c:308:36:    expected unsigned int [unsigned] [usertype] a
    fs/ceph/inode.c:308:36:    got restricted __le32 [usertype] frag
    fs/ceph/inode.c:308:46: warning: incorrect type in argument 2 (different base types)
    fs/ceph/inode.c:308:46:    expected unsigned int [unsigned] [usertype] b
    fs/ceph/inode.c:308:46:    got restricted __le32 [usertype] frag

We need to convert these values to host-endian before calling the
comparator.

Fixes: a407846e ("ceph: don't assume frag tree splits in mds reply are sorted")
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

parent 1097680d

fs/ceph/inode.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -305,7 +305,8 @@ static int frag_tree_split_cmp(const void l, const void r)
		{
		struct ceph_frag_tree_split ls = (struct ceph_frag_tree_split)l;
		struct ceph_frag_tree_split rs = (struct ceph_frag_tree_split)r;
		return ceph_frag_compare(ls->frag, rs->frag);
		return ceph_frag_compare(le32_to_cpu(ls->frag),
		le32_to_cpu(rs->frag));
		}

		static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)