- register struct fs *fs;
- register struct cg *cgp;
- register struct buf *bp;
- int cg, blk, frags, bbase;
- register int i;
-
- fs = ip->i_fs;
- if ((unsigned)size > fs->fs_bsize || fragoff(fs, size) != 0) {
- printf("dev = 0x%x, bsize = %d, size = %d, fs = %s\n",
- ip->i_dev, fs->fs_bsize, size, fs->fs_fsmnt);
- panic("free: bad size");
- }
- cg = dtog(fs, bno);
- if (badblock(fs, bno)) {
- printf("bad block %d, ino %d\n", bno, ip->i_number);
- return;
- }
- bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize);
- cgp = bp->b_un.b_cg;
- if (bp->b_flags & B_ERROR || cgp->cg_magic != CG_MAGIC) {
- brelse(bp);
- return;
- }
- cgp->cg_time = time.tv_sec;
- bno = dtogd(fs, bno);
- if (size == fs->fs_bsize) {
- if (isblock(fs, cgp->cg_free, fragstoblks(fs, bno))) {
- printf("dev = 0x%x, block = %d, fs = %s\n",
- ip->i_dev, bno, fs->fs_fsmnt);
- panic("free: freeing free block");
- }
- setblock(fs, cgp->cg_free, fragstoblks(fs, bno));
- cgp->cg_cs.cs_nbfree++;
- fs->fs_cstotal.cs_nbfree++;
- fs->fs_cs(fs, cg).cs_nbfree++;
- i = cbtocylno(fs, bno);
- cgp->cg_b[i][cbtorpos(fs, bno)]++;
- cgp->cg_btot[i]++;
- } else {
- bbase = bno - fragnum(fs, bno);
- /*
- * decrement the counts associated with the old frags
- */
- blk = blkmap(fs, cgp->cg_free, bbase);
- fragacct(fs, blk, cgp->cg_frsum, -1);
- /*
- * deallocate the fragment
- */
- frags = numfrags(fs, size);
- for (i = 0; i < frags; i++) {
- if (isset(cgp->cg_free, bno + i)) {
- printf("dev = 0x%x, block = %d, fs = %s\n",
- ip->i_dev, bno + i, fs->fs_fsmnt);
- panic("free: freeing free frag");
- }
- setbit(cgp->cg_free, bno + i);
- }
- cgp->cg_cs.cs_nffree += i;
- fs->fs_cstotal.cs_nffree += i;
- fs->fs_cs(fs, cg).cs_nffree += i;
- /*
- * add back in counts associated with the new frags
- */
- blk = blkmap(fs, cgp->cg_free, bbase);
- fragacct(fs, blk, cgp->cg_frsum, 1);
- /*
- * if a complete block has been reassembled, account for it
- */
- if (isblock(fs, cgp->cg_free, fragstoblks(fs, bbase))) {
- cgp->cg_cs.cs_nffree -= fs->fs_frag;
- fs->fs_cstotal.cs_nffree -= fs->fs_frag;
- fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
- cgp->cg_cs.cs_nbfree++;
- fs->fs_cstotal.cs_nbfree++;
- fs->fs_cs(fs, cg).cs_nbfree++;
- i = cbtocylno(fs, bbase);
- cgp->cg_b[i][cbtorpos(fs, bbase)]++;
- cgp->cg_btot[i]++;
- }
- }
- fs->fs_fmod++;
- bdwrite(bp);
-}
-
-/*
- * Free an inode.
- *
- * The specified inode is placed back in the free map.
- */
-ifree(ip, ino, mode)