cg_blksfree_swap
setbit(cg_blksfree_swap(cgp, needswap), bpref + i);
clrbit(cg_blksfree_swap(cgp, needswap), bno + i);
blksfree_swap = cg_blksfree_swap(cgp, needswap);
if (!ffs_isfreeblock(fs, cg_blksfree_swap(cgp, needswap), fragno)) {
ffs_setblock(fs, cg_blksfree_swap(cgp, needswap), fragno);
blk = blkmap(fs, cg_blksfree_swap(cgp, needswap), bbase);
if (isset(cg_blksfree_swap(cgp, needswap), cgbno + i)) {
setbit(cg_blksfree_swap(cgp, needswap), cgbno + i);
blk = blkmap(fs, cg_blksfree_swap(cgp, needswap), bbase);
if (ffs_isblock(fs, cg_blksfree_swap(cgp, needswap), fragno)) {
(const u_char *)&cg_blksfree_swap(cgp, needswap)[start],
(const u_char *)&cg_blksfree_swap(cgp, needswap)[0],
(long)cg_blksfree_swap(cgp, needswap) - (long)cgp);
blk = blkmap(fs, cg_blksfree_swap(cgp, needswap), bno);
ffs_setblock(&sblock, cg_blksfree_swap(&acg, 0), blkno);
setbit(cg_blksfree_swap(&acg, 0), dupper);
ffs_setblock(&sblock, cg_blksfree_swap(&acg, 0), blkno);
setbit(cg_blksfree_swap(&acg, 0), d);