ffs_alloccg
static ufs2_daddr_t ffs_alloccg(struct inode *, uint64_t, ufs2_daddr_t, int,
bno = ffs_hashalloc(ip, cg, bpref, size, size, ffs_alloccg);
bno = ffs_hashalloc(ip, cg, bpref, request, nsize, ffs_alloccg);
bno = ffs_hashalloc(ip, cg, bpref, size, ffs_alloccg);
static daddr_t ffs_alloccg(struct inode *, int, daddr_t, int);