/**
* lookup_mp_height - helper function for lookup_metapath
* @ip: the inode
* @mp: the metapath
* @h: the height which needs looking up
*/
static int lookup_mp_height(struct gfs2_inode *ip, struct metapath *mp, int h)
{
__be64 *ptr = metapointer(h, mp);
u64 dblock = be64_to_cpu(*ptr);
if (!dblock)
return h + 1;
return gfs2_meta_indirect_buffer(ip, h + 1, dblock, &mp->mp_bh[h + 1]);
}
static int lookup_metapath(struct gfs2_inode *ip, struct metapath *mp)
{
unsigned int end_of_metadata = ip->i_height - 1;
unsigned int x;
__be64 *ptr;
u64 dblock;
int ret;
for (x = 0; x < end_of_metadata; x++) {
ptr = metapointer(x, mp);
dblock = be64_to_cpu(*ptr);
if (!dblock)
return x + 1;
ret = gfs2_meta_indirect_buffer(ip, x+1, dblock, 0, &mp->mp_bh[x+1]);
if (ret)
return ret;
}
return ip->i_height;
}