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[unix-history] / usr / src / sys / ufs / lfs / lfs_alloc.c
diff --git a/usr/src/sys/ufs/lfs/lfs_alloc.c b/usr/src/sys/ufs/lfs/lfs_alloc.c
index 0f93065..4e523bd 100644 (file)
--- a/usr/src/sys/ufs/lfs/lfs_alloc.c
+++ b/usr/src/sys/ufs/lfs/lfs_alloc.c
@@ -1,16 +1,34 @@
-/*     lfs_alloc.c     2.24    83/03/21        */
+/*
+ * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *     @(#)lfs_alloc.c 7.15 (Berkeley) %G%
+ */
 
 
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/mount.h"
-#include "../h/fs.h"
-#include "../h/conf.h"
-#include "../h/buf.h"
-#include "../h/inode.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/quota.h"
-#include "../h/kernel.h"
+#include "param.h"
+#include "systm.h"
+#include "mount.h"
+#include "buf.h"
+#include "user.h"
+#include "vnode.h"
+#include "kernel.h"
+#include "syslog.h"
+#include "cmap.h"
+#include "../ufs/quota.h"
+#include "../ufs/inode.h"
+#include "../ufs/fs.h"
 
 extern u_long          hashalloc();
 extern ino_t           ialloccg();
 
 extern u_long          hashalloc();
 extern ino_t           ialloccg();
@@ -41,17 +59,18 @@ extern unsigned char        *fragtbl[];
  *   2) quadradically rehash into other cylinder groups, until an
  *      available block is located.
  */
  *   2) quadradically rehash into other cylinder groups, until an
  *      available block is located.
  */
-struct buf *
-alloc(ip, bpref, size)
+alloc(ip, lbn, bpref, size, bnp)
        register struct inode *ip;
        register struct inode *ip;
-       daddr_t bpref;
+       daddr_t lbn, bpref;
        int size;
        int size;
+       daddr_t *bnp;
 {
        daddr_t bno;
        register struct fs *fs;
        register struct buf *bp;
 {
        daddr_t bno;
        register struct fs *fs;
        register struct buf *bp;
-       int cg;
+       int cg, error;
        
        
+       *bnp = 0;
        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",
        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",
@@ -63,8 +82,8 @@ alloc(ip, bpref, size)
        if (u.u_uid != 0 && freespace(fs, fs->fs_minfree) <= 0)
                goto nospace;
 #ifdef QUOTA
        if (u.u_uid != 0 && freespace(fs, fs->fs_minfree) <= 0)
                goto nospace;
 #ifdef QUOTA
-       if (chkdq(ip, (long)((unsigned)size/DEV_BSIZE), 0))
-               return(NULL);
+       if (error = chkdq(ip, (long)btodb(size), 0))
+               return (error);
 #endif
        if (bpref >= fs->fs_size)
                bpref = 0;
 #endif
        if (bpref >= fs->fs_size)
                bpref = 0;
@@ -74,16 +93,16 @@ alloc(ip, bpref, size)
                cg = dtog(fs, bpref);
        bno = (daddr_t)hashalloc(ip, cg, (long)bpref, size,
                (u_long (*)())alloccg);
                cg = dtog(fs, bpref);
        bno = (daddr_t)hashalloc(ip, cg, (long)bpref, size,
                (u_long (*)())alloccg);
-       if (bno <= 0)
-               goto nospace;
-       bp = getblk(ip->i_dev, fsbtodb(fs, bno), size);
-       clrbuf(bp);
-       return (bp);
+       if (bno > 0) {
+               ip->i_blocks += btodb(size);
+               ip->i_flag |= IUPD|ICHG;
+               *bnp = bno;
+               return (0);
+       }
 nospace:
        fserr(fs, "file system full");
        uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
 nospace:
        fserr(fs, "file system full");
        uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
-       u.u_error = ENOSPC;
-       return (NULL);
+       return (ENOSPC);
 }
 
 /*
 }
 
 /*
@@ -94,17 +113,20 @@ nospace:
  * the original block. Failing that, the regular block allocator is
  * invoked to get an appropriate block.
  */
  * the original block. Failing that, the regular block allocator is
  * invoked to get an appropriate block.
  */
-struct buf *
-realloccg(ip, bprev, bpref, osize, nsize)
+realloccg(ip, lbprev, bpref, osize, nsize, bpp)
        register struct inode *ip;
        register struct inode *ip;
-       daddr_t bprev, bpref;
+       off_t lbprev;
+       daddr_t bpref;
        int osize, nsize;
        int osize, nsize;
+       struct buf **bpp;
 {
 {
-       daddr_t bno;
        register struct fs *fs;
        register struct fs *fs;
-       register struct buf *bp, *obp;
-       int cg;
+       struct buf *bp, *obp;
+       int cg, request;
+       daddr_t bprev, bno, bn;
+       int i, error, count;
        
        
+       *bpp = 0;
        fs = ip->i_fs;
        if ((unsigned)osize > fs->fs_bsize || fragoff(fs, osize) != 0 ||
            (unsigned)nsize > fs->fs_bsize || fragoff(fs, nsize) != 0) {
        fs = ip->i_fs;
        if ((unsigned)osize > fs->fs_bsize || fragoff(fs, osize) != 0 ||
            (unsigned)nsize > fs->fs_bsize || fragoff(fs, nsize) != 0) {
@@ -114,54 +136,117 @@ realloccg(ip, bprev, bpref, osize, nsize)
        }
        if (u.u_uid != 0 && freespace(fs, fs->fs_minfree) <= 0)
                goto nospace;
        }
        if (u.u_uid != 0 && freespace(fs, fs->fs_minfree) <= 0)
                goto nospace;
-       if (bprev == 0) {
+       if ((bprev = ip->i_db[lbprev]) == 0) {
                printf("dev = 0x%x, bsize = %d, bprev = %d, fs = %s\n",
                    ip->i_dev, fs->fs_bsize, bprev, fs->fs_fsmnt);
                panic("realloccg: bad bprev");
        }
 #ifdef QUOTA
                printf("dev = 0x%x, bsize = %d, bprev = %d, fs = %s\n",
                    ip->i_dev, fs->fs_bsize, bprev, fs->fs_fsmnt);
                panic("realloccg: bad bprev");
        }
 #ifdef QUOTA
-       if (chkdq(ip, (long)((unsigned)(nsize-osize)/DEV_BSIZE), 0))
-               return(NULL);
+       if (error = chkdq(ip, (long)btodb(nsize - osize), 0))
+               return (error);
 #endif
 #endif
+       /*
+        * Allocate the extra space in the buffer.
+        */
+       if (error = bread(ITOV(ip), lbprev, osize, NOCRED, &bp)) {
+               brelse(bp);
+               return (error);
+       }
+       brealloc(bp, nsize);
+       bp->b_flags |= B_DONE;
+       bzero(bp->b_un.b_addr + osize, (unsigned)nsize - osize);
+       /*
+        * Check for extension in the existing location.
+        */
        cg = dtog(fs, bprev);
        cg = dtog(fs, bprev);
-       bno = fragextend(ip, cg, (long)bprev, osize, nsize);
-       if (bno != 0) {
-               do {
-                       bp = bread(ip->i_dev, fsbtodb(fs, bno), osize);
-                       if (bp->b_flags & B_ERROR) {
-                               brelse(bp);
-                               return (NULL);
-                       }
-               } while (brealloc(bp, nsize) == 0);
-               bp->b_flags |= B_DONE;
-               bzero(bp->b_un.b_addr + osize, (unsigned)nsize - osize);
-               return (bp);
+       if (bno = fragextend(ip, cg, (long)bprev, osize, nsize)) {
+               if (bp->b_blkno != bno)
+                       panic("bad blockno");
+               ip->i_blocks += btodb(nsize - osize);
+               ip->i_flag |= IUPD|ICHG;
+               *bpp = bp;
+               return (0);
        }
        }
+       /*
+        * Allocate a new disk location.
+        */
        if (bpref >= fs->fs_size)
                bpref = 0;
        if (bpref >= fs->fs_size)
                bpref = 0;
-       bno = (daddr_t)hashalloc(ip, cg, (long)bpref, nsize,
+       switch ((int)fs->fs_optim) {
+       case FS_OPTSPACE:
+               /*
+                * Allocate an exact sized fragment. Although this makes 
+                * best use of space, we will waste time relocating it if 
+                * the file continues to grow. If the fragmentation is
+                * less than half of the minimum free reserve, we choose
+                * to begin optimizing for time.
+                */
+               request = nsize;
+               if (fs->fs_minfree < 5 ||
+                   fs->fs_cstotal.cs_nffree >
+                   fs->fs_dsize * fs->fs_minfree / (2 * 100))
+                       break;
+               log(LOG_NOTICE, "%s: optimization changed from SPACE to TIME\n",
+                       fs->fs_fsmnt);
+               fs->fs_optim = FS_OPTTIME;
+               break;
+       case FS_OPTTIME:
+               /*
+                * At this point we have discovered a file that is trying
+                * to grow a small fragment to a larger fragment. To save
+                * time, we allocate a full sized block, then free the 
+                * unused portion. If the file continues to grow, the 
+                * `fragextend' call above will be able to grow it in place
+                * without further copying. If aberrant programs cause
+                * disk fragmentation to grow within 2% of the free reserve,
+                * we choose to begin optimizing for space.
+                */
+               request = fs->fs_bsize;
+               if (fs->fs_cstotal.cs_nffree <
+                   fs->fs_dsize * (fs->fs_minfree - 2) / 100)
+                       break;
+               log(LOG_NOTICE, "%s: optimization changed from TIME to SPACE\n",
+                       fs->fs_fsmnt);
+               fs->fs_optim = FS_OPTSPACE;
+               break;
+       default:
+               printf("dev = 0x%x, optim = %d, fs = %s\n",
+                   ip->i_dev, fs->fs_optim, fs->fs_fsmnt);
+               panic("realloccg: bad optim");
+               /* NOTREACHED */
+       }
+       bno = (daddr_t)hashalloc(ip, cg, (long)bpref, request,
                (u_long (*)())alloccg);
        if (bno > 0) {
                (u_long (*)())alloccg);
        if (bno > 0) {
-               obp = bread(ip->i_dev, fsbtodb(fs, bprev), osize);
-               if (obp->b_flags & B_ERROR) {
-                       brelse(obp);
-                       return (NULL);
-               }
-               bp = getblk(ip->i_dev, fsbtodb(fs, bno), nsize);
-               bcopy(obp->b_un.b_addr, bp->b_un.b_addr, (u_int)osize);
-               bzero(bp->b_un.b_addr + osize, (unsigned)nsize - osize);
-               brelse(obp);
-               free(ip, bprev, (off_t)osize);
-               return (bp);
+#ifdef SECSIZE
+               obp = bread(ip->i_dev, fsbtodb(fs, bprev), osize,
+                   fs->fs_dbsize);
+#else SECSIZE
+               bp->b_blkno = bn = fsbtodb(fs, bno);
+               count = howmany(osize, CLBYTES);
+               for (i = 0; i < count; i++)
+#ifdef SECSIZE
+                       munhash(ip->i_dev, bn + i * CLBYTES / fs->fs_dbsize);
+#else SECSIZE
+                       munhash(ip->i_dev, bn + i * CLBYTES / DEV_BSIZE);
+#endif SECSIZE
+               blkfree(ip, bprev, (off_t)osize);
+               if (nsize < request)
+                       blkfree(ip, bno + numfrags(fs, nsize),
+                               (off_t)(request - nsize));
+               ip->i_blocks += btodb(nsize - osize);
+               ip->i_flag |= IUPD|ICHG;
+               *bpp = bp;
+               return (0);
        }
        }
+       brelse(bp);
 nospace:
        /*
         * no space available
         */
        fserr(fs, "file system full");
        uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
 nospace:
        /*
         * no space available
         */
        fserr(fs, "file system full");
        uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
-       u.u_error = ENOSPC;
-       return (NULL);
+       return (ENOSPC);
 }
 
 /*
 }
 
 /*
@@ -179,23 +264,24 @@ nospace:
  *   2) quadradically rehash into other cylinder groups, until an
  *      available inode is located.
  */
  *   2) quadradically rehash into other cylinder groups, until an
  *      available inode is located.
  */
-struct inode *
-ialloc(pip, ipref, mode)
+ialloc(pip, ipref, mode, ipp)
        register struct inode *pip;
        ino_t ipref;
        int mode;
        register struct inode *pip;
        ino_t ipref;
        int mode;
+       struct inode **ipp;
 {
        ino_t ino;
        register struct fs *fs;
        register struct inode *ip;
 {
        ino_t ino;
        register struct fs *fs;
        register struct inode *ip;
-       int cg;
+       int cg, error;
        
        
+       *ipp = 0;
        fs = pip->i_fs;
        if (fs->fs_cstotal.cs_nifree == 0)
                goto noinodes;
 #ifdef QUOTA
        fs = pip->i_fs;
        if (fs->fs_cstotal.cs_nifree == 0)
                goto noinodes;
 #ifdef QUOTA
-       if (chkiq(pip->i_dev, (struct inode *)NULL, u.u_uid, 0))
-               return(NULL);
+       if (error = chkiq(pip->i_dev, (struct inode *)NULL, u.u_uid, 0))
+               return (error);
 #endif
        if (ipref >= fs->fs_ncg * fs->fs_ipg)
                ipref = 0;
 #endif
        if (ipref >= fs->fs_ncg * fs->fs_ipg)
                ipref = 0;
@@ -203,22 +289,34 @@ ialloc(pip, ipref, mode)
        ino = (ino_t)hashalloc(pip, cg, (long)ipref, mode, ialloccg);
        if (ino == 0)
                goto noinodes;
        ino = (ino_t)hashalloc(pip, cg, (long)ipref, mode, ialloccg);
        if (ino == 0)
                goto noinodes;
-       ip = iget(pip->i_dev, pip->i_fs, ino);
-       if (ip == NULL) {
-               ifree(ip, ino, 0);
-               return (NULL);
+       error = iget(pip, ino, ipp);
+       if (error) {
+               ifree(pip, ino, 0);
+               return (error);
        }
        }
+       ip = *ipp;
        if (ip->i_mode) {
                printf("mode = 0%o, inum = %d, fs = %s\n",
                    ip->i_mode, ip->i_number, fs->fs_fsmnt);
                panic("ialloc: dup alloc");
        }
        if (ip->i_mode) {
                printf("mode = 0%o, inum = %d, fs = %s\n",
                    ip->i_mode, ip->i_number, fs->fs_fsmnt);
                panic("ialloc: dup alloc");
        }
-       return (ip);
+       if (ip->i_blocks) {                             /* XXX */
+               printf("free inode %s/%d had %d blocks\n",
+                   fs->fs_fsmnt, ino, ip->i_blocks);
+               ip->i_blocks = 0;
+       }
+       ip->i_flags = 0;
+       /*
+        * Set up a new generation number for this inode.
+        */
+       if (++nextgennumber < (u_long)time.tv_sec)
+               nextgennumber = time.tv_sec;
+       ip->i_gen = nextgennumber;
+       return (0);
 noinodes:
        fserr(fs, "out of inodes");
        uprintf("\n%s: create/symlink failed, no inodes free\n", fs->fs_fsmnt);
 noinodes:
        fserr(fs, "out of inodes");
        uprintf("\n%s: create/symlink failed, no inodes free\n", fs->fs_fsmnt);
-       u.u_error = ENOSPC;
-       return (NULL);
+       return (ENOSPC);
 }
 
 /*
 }
 
 /*
@@ -256,9 +354,14 @@ dirpref(fs)
  * the file. If no blocks have been allocated in any other section, the
  * policy is to place the section in a cylinder group with a greater than
  * average number of free blocks.  An appropriate cylinder group is found
  * the file. If no blocks have been allocated in any other section, the
  * policy is to place the section in a cylinder group with a greater than
  * average number of free blocks.  An appropriate cylinder group is found
- * by maintaining a rotor that sweeps the cylinder groups. When a new
- * group of blocks is needed, the rotor is advanced until a cylinder group
- * with greater than the average number of free blocks is found.
+ * by using a rotor that sweeps the cylinder groups. When a new group of
+ * blocks is needed, the sweep begins in the cylinder group following the
+ * cylinder group from which the previous allocation was made. The sweep
+ * continues until a cylinder group with greater than the average number
+ * of free blocks is found. If the allocation is for the first block in an
+ * indirect block, the information on the previous allocation is unavailable;
+ * here a best guess is made based upon the logical block number being
+ * allocated.
  * 
  * If a section is already partially allocated, the policy is to
  * contiguously allocate fs_maxcontig blocks.  The end of one of these
  * 
  * If a section is already partially allocated, the policy is to
  * contiguously allocate fs_maxcontig blocks.  The end of one of these
@@ -275,7 +378,8 @@ blkpref(ip, lbn, indx, bap)
        daddr_t *bap;
 {
        register struct fs *fs;
        daddr_t *bap;
 {
        register struct fs *fs;
-       int cg, avgbfree;
+       register int cg;
+       int avgbfree, startcg;
        daddr_t nextblk;
 
        fs = ip->i_fs;
        daddr_t nextblk;
 
        fs = ip->i_fs;
@@ -288,13 +392,18 @@ blkpref(ip, lbn, indx, bap)
                 * Find a cylinder with greater than average number of
                 * unused data blocks.
                 */
                 * Find a cylinder with greater than average number of
                 * unused data blocks.
                 */
+               if (indx == 0 || bap[indx - 1] == 0)
+                       startcg = itog(fs, ip->i_number) + lbn / fs->fs_maxbpg;
+               else
+                       startcg = dtog(fs, bap[indx - 1]) + 1;
+               startcg %= fs->fs_ncg;
                avgbfree = fs->fs_cstotal.cs_nbfree / fs->fs_ncg;
                avgbfree = fs->fs_cstotal.cs_nbfree / fs->fs_ncg;
-               for (cg = fs->fs_cgrotor + 1; cg < fs->fs_ncg; cg++)
+               for (cg = startcg; cg < fs->fs_ncg; cg++)
                        if (fs->fs_cs(fs, cg).cs_nbfree >= avgbfree) {
                                fs->fs_cgrotor = cg;
                                return (fs->fs_fpg * cg + fs->fs_frag);
                        }
                        if (fs->fs_cs(fs, cg).cs_nbfree >= avgbfree) {
                                fs->fs_cgrotor = cg;
                                return (fs->fs_fpg * cg + fs->fs_frag);
                        }
-               for (cg = 0; cg <= fs->fs_cgrotor; cg++)
+               for (cg = 0; cg <= startcg; cg++)
                        if (fs->fs_cs(fs, cg).cs_nbfree >= avgbfree) {
                                fs->fs_cgrotor = cg;
                                return (fs->fs_fpg * cg + fs->fs_frag);
                        if (fs->fs_cs(fs, cg).cs_nbfree >= avgbfree) {
                                fs->fs_cgrotor = cg;
                                return (fs->fs_fpg * cg + fs->fs_frag);
@@ -394,31 +503,41 @@ fragextend(ip, cg, bprev, osize, nsize)
        int osize, nsize;
 {
        register struct fs *fs;
        int osize, nsize;
 {
        register struct fs *fs;
-       register struct buf *bp;
        register struct cg *cgp;
        register struct cg *cgp;
+       struct buf *bp;
        long bno;
        int frags, bbase;
        long bno;
        int frags, bbase;
-       int i;
+       int i, error;
 
        fs = ip->i_fs;
 
        fs = ip->i_fs;
-       if (fs->fs_cs(fs, cg).cs_nffree < nsize - osize)
+       if (fs->fs_cs(fs, cg).cs_nffree < numfrags(fs, nsize - osize))
                return (NULL);
        frags = numfrags(fs, nsize);
                return (NULL);
        frags = numfrags(fs, nsize);
-       bbase = fragoff(fs, bprev);
-       if (bbase > (bprev + frags - 1) % fs->fs_frag) {
-               /* cannot extend across a block boundry */
+       bbase = fragnum(fs, bprev);
+       if (bbase > fragnum(fs, (bprev + frags - 1))) {
+               /* cannot extend across a block boundary */
+               return (NULL);
+       }
+#ifdef SECSIZE
+       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize,
+           fs->fs_dbsize);
+#else SECSIZE
+       error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
+               (int)fs->fs_cgsize, NOCRED, &bp);
+       if (error) {
+               brelse(bp);
                return (NULL);
        }
                return (NULL);
        }
-       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize);
+#endif SECSIZE
        cgp = bp->b_un.b_cg;
        cgp = bp->b_un.b_cg;
-       if (bp->b_flags & B_ERROR || cgp->cg_magic != CG_MAGIC) {
+       if (!cg_chkmagic(cgp)) {
                brelse(bp);
                return (NULL);
        }
        cgp->cg_time = time.tv_sec;
        bno = dtogd(fs, bprev);
        for (i = numfrags(fs, osize); i < frags; i++)
                brelse(bp);
                return (NULL);
        }
        cgp->cg_time = time.tv_sec;
        bno = dtogd(fs, bprev);
        for (i = numfrags(fs, osize); i < frags; i++)
-               if (isclr(cgp->cg_free, bno + i)) {
+               if (isclr(cg_blksfree(cgp), bno + i)) {
                        brelse(bp);
                        return (NULL);
                }
                        brelse(bp);
                        return (NULL);
                }
@@ -429,13 +548,13 @@ fragextend(ip, cg, bprev, osize, nsize)
         * allocate the extended piece
         */
        for (i = frags; i < fs->fs_frag - bbase; i++)
         * allocate the extended piece
         */
        for (i = frags; i < fs->fs_frag - bbase; i++)
-               if (isclr(cgp->cg_free, bno + i))
+               if (isclr(cg_blksfree(cgp), bno + i))
                        break;
        cgp->cg_frsum[i - numfrags(fs, osize)]--;
        if (i != frags)
                cgp->cg_frsum[i - frags]++;
        for (i = numfrags(fs, osize); i < frags; i++) {
                        break;
        cgp->cg_frsum[i - numfrags(fs, osize)]--;
        if (i != frags)
                cgp->cg_frsum[i - frags]++;
        for (i = numfrags(fs, osize); i < frags; i++) {
-               clrbit(cgp->cg_free, bno + i);
+               clrbit(cg_blksfree(cgp), bno + i);
                cgp->cg_cs.cs_nffree--;
                fs->fs_cstotal.cs_nffree--;
                fs->fs_cs(fs, cg).cs_nffree--;
                cgp->cg_cs.cs_nffree--;
                fs->fs_cstotal.cs_nffree--;
                fs->fs_cs(fs, cg).cs_nffree--;
@@ -459,23 +578,31 @@ alloccg(ip, cg, bpref, size)
        int size;
 {
        register struct fs *fs;
        int size;
 {
        register struct fs *fs;
-       register struct buf *bp;
        register struct cg *cgp;
        register struct cg *cgp;
-       int bno, frags;
-       int allocsiz;
+       struct buf *bp;
        register int i;
        register int i;
+       int error, bno, frags, allocsiz;
 
        fs = ip->i_fs;
        if (fs->fs_cs(fs, cg).cs_nbfree == 0 && size == fs->fs_bsize)
                return (NULL);
 
        fs = ip->i_fs;
        if (fs->fs_cs(fs, cg).cs_nbfree == 0 && size == fs->fs_bsize)
                return (NULL);
-       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) {
+#ifdef SECSIZE
+       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize,
+           fs->fs_dbsize);
+#else SECSIZE
+       error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
+               (int)fs->fs_cgsize, NOCRED, &bp);
+       if (error) {
                brelse(bp);
                return (NULL);
        }
                brelse(bp);
                return (NULL);
        }
-       if (cgp->cg_cs.cs_nbfree == 0 && size == fs->fs_bsize)
+#endif SECSIZE
+       cgp = bp->b_un.b_cg;
+       if (!cg_chkmagic(cgp) ||
+           (cgp->cg_cs.cs_nbfree == 0 && size == fs->fs_bsize)) {
+               brelse(bp);
                return (NULL);
                return (NULL);
+       }
        cgp->cg_time = time.tv_sec;
        if (size == fs->fs_bsize) {
                bno = alloccgblk(fs, cgp, bpref);
        cgp->cg_time = time.tv_sec;
        if (size == fs->fs_bsize) {
                bno = alloccgblk(fs, cgp, bpref);
@@ -503,7 +630,7 @@ alloccg(ip, cg, bpref, size)
                bno = alloccgblk(fs, cgp, bpref);
                bpref = dtogd(fs, bno);
                for (i = frags; i < fs->fs_frag; i++)
                bno = alloccgblk(fs, cgp, bpref);
                bpref = dtogd(fs, bno);
                for (i = frags; i < fs->fs_frag; i++)
-                       setbit(cgp->cg_free, bpref + i);
+                       setbit(cg_blksfree(cgp), bpref + i);
                i = fs->fs_frag - frags;
                cgp->cg_cs.cs_nffree += i;
                fs->fs_cstotal.cs_nffree += i;
                i = fs->fs_frag - frags;
                cgp->cg_cs.cs_nffree += i;
                fs->fs_cstotal.cs_nffree += i;
@@ -514,10 +641,12 @@ alloccg(ip, cg, bpref, size)
                return (bno);
        }
        bno = mapsearch(fs, cgp, bpref, allocsiz);
                return (bno);
        }
        bno = mapsearch(fs, cgp, bpref, allocsiz);
-       if (bno < 0)
+       if (bno < 0) {
+               brelse(bp);
                return (NULL);
                return (NULL);
+       }
        for (i = 0; i < frags; i++)
        for (i = 0; i < frags; i++)
-               clrbit(cgp->cg_free, bno + i);
+               clrbit(cg_blksfree(cgp), bno + i);
        cgp->cg_cs.cs_nffree -= frags;
        fs->fs_cstotal.cs_nffree -= frags;
        fs->fs_cs(fs, cg).cs_nffree -= frags;
        cgp->cg_cs.cs_nffree -= frags;
        fs->fs_cstotal.cs_nffree -= frags;
        fs->fs_cs(fs, cg).cs_nffree -= frags;
@@ -555,12 +684,12 @@ alloccgblk(fs, cgp, bpref)
                bpref = cgp->cg_rotor;
                goto norot;
        }
                bpref = cgp->cg_rotor;
                goto norot;
        }
-       bpref &= ~(fs->fs_frag - 1);
+       bpref = blknum(fs, bpref);
        bpref = dtogd(fs, bpref);
        /*
         * if the requested block is available, use it
         */
        bpref = dtogd(fs, bpref);
        /*
         * if the requested block is available, use it
         */
-       if (isblock(fs, cgp->cg_free, fragstoblks(fs, bpref))) {
+       if (isblock(fs, cg_blksfree(cgp), fragstoblks(fs, bpref))) {
                bno = bpref;
                goto gotit;
        }
                bno = bpref;
                goto gotit;
        }
@@ -568,7 +697,7 @@ alloccgblk(fs, cgp, bpref)
         * check for a block available on the same cylinder
         */
        cylno = cbtocylno(fs, bpref);
         * check for a block available on the same cylinder
         */
        cylno = cbtocylno(fs, bpref);
-       if (cgp->cg_btot[cylno] == 0)
+       if (cg_blktot(cgp)[cylno] == 0)
                goto norot;
        if (fs->fs_cpc == 0) {
                /*
                goto norot;
        if (fs->fs_cpc == 0) {
                /*
@@ -583,12 +712,12 @@ alloccgblk(fs, cgp, bpref)
         * available in the requested cylinder starting at the
         * requested rotational position and proceeding around.
         */
         * available in the requested cylinder starting at the
         * requested rotational position and proceeding around.
         */
-       cylbp = cgp->cg_b[cylno];
+       cylbp = cg_blks(fs, cgp, cylno);
        pos = cbtorpos(fs, bpref);
        pos = cbtorpos(fs, bpref);
-       for (i = pos; i < NRPOS; i++)
+       for (i = pos; i < fs->fs_nrpos; i++)
                if (cylbp[i] > 0)
                        break;
                if (cylbp[i] > 0)
                        break;
-       if (i == NRPOS)
+       if (i == fs->fs_nrpos)
                for (i = 0; i < pos; i++)
                        if (cylbp[i] > 0)
                                break;
                for (i = 0; i < pos; i++)
                        if (cylbp[i] > 0)
                                break;
@@ -599,18 +728,19 @@ alloccgblk(fs, cgp, bpref)
                 */
                pos = cylno % fs->fs_cpc;
                bno = (cylno - pos) * fs->fs_spc / NSPB(fs);
                 */
                pos = cylno % fs->fs_cpc;
                bno = (cylno - pos) * fs->fs_spc / NSPB(fs);
-               if (fs->fs_postbl[pos][i] == -1) {
+               if (fs_postbl(fs, pos)[i] == -1) {
                        printf("pos = %d, i = %d, fs = %s\n",
                            pos, i, fs->fs_fsmnt);
                        panic("alloccgblk: cyl groups corrupted");
                }
                        printf("pos = %d, i = %d, fs = %s\n",
                            pos, i, fs->fs_fsmnt);
                        panic("alloccgblk: cyl groups corrupted");
                }
-               for (i = fs->fs_postbl[pos][i];; ) {
-                       if (isblock(fs, cgp->cg_free, bno + i)) {
+               for (i = fs_postbl(fs, pos)[i];; ) {
+                       if (isblock(fs, cg_blksfree(cgp), bno + i)) {
                                bno = blkstofrags(fs, (bno + i));
                                goto gotit;
                        }
                                bno = blkstofrags(fs, (bno + i));
                                goto gotit;
                        }
-                       delta = fs->fs_rotbl[i];
-                       if (delta <= 0 || delta > MAXBPC - i)
+                       delta = fs_rotbl(fs)[i];
+                       if (delta <= 0 ||
+                           delta + i > fragstoblks(fs, fs->fs_fpg))
                                break;
                        i += delta;
                }
                                break;
                        i += delta;
                }
@@ -627,17 +757,17 @@ norot:
                return (NULL);
        cgp->cg_rotor = bno;
 gotit:
                return (NULL);
        cgp->cg_rotor = bno;
 gotit:
-       clrblock(fs, cgp->cg_free, (long)fragstoblks(fs, bno));
+       clrblock(fs, cg_blksfree(cgp), (long)fragstoblks(fs, bno));
        cgp->cg_cs.cs_nbfree--;
        fs->fs_cstotal.cs_nbfree--;
        fs->fs_cs(fs, cgp->cg_cgx).cs_nbfree--;
        cylno = cbtocylno(fs, bno);
        cgp->cg_cs.cs_nbfree--;
        fs->fs_cstotal.cs_nbfree--;
        fs->fs_cs(fs, cgp->cg_cgx).cs_nbfree--;
        cylno = cbtocylno(fs, bno);
-       cgp->cg_b[cylno][cbtorpos(fs, bno)]--;
-       cgp->cg_btot[cylno]--;
+       cg_blks(fs, cgp, cylno)[cbtorpos(fs, bno)]--;
+       cg_blktot(cgp)[cylno]--;
        fs->fs_fmod++;
        return (cgp->cg_cgx * fs->fs_fpg + bno);
 }
        fs->fs_fmod++;
        return (cgp->cg_cgx * fs->fs_fpg + bno);
 }
-       
+
 /*
  * Determine whether an inode can be allocated.
  *
 /*
  * Determine whether an inode can be allocated.
  *
@@ -655,41 +785,63 @@ ialloccg(ip, cg, ipref, mode)
        int mode;
 {
        register struct fs *fs;
        int mode;
 {
        register struct fs *fs;
-       register struct buf *bp;
        register struct cg *cgp;
        register struct cg *cgp;
-       int i;
+       struct buf *bp;
+       int error, start, len, loc, map, i;
 
        fs = ip->i_fs;
        if (fs->fs_cs(fs, cg).cs_nifree == 0)
                return (NULL);
 
        fs = ip->i_fs;
        if (fs->fs_cs(fs, cg).cs_nifree == 0)
                return (NULL);
-       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) {
+#ifdef SECSIZE
+       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize,
+           fs->fs_dbsize);
+#else SECSIZE
+       error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
+               (int)fs->fs_cgsize, NOCRED, &bp);
+       if (error) {
                brelse(bp);
                return (NULL);
        }
                brelse(bp);
                return (NULL);
        }
-       if (cgp->cg_cs.cs_nifree == 0)
+#endif SECSIZE
+       cgp = bp->b_un.b_cg;
+       if (!cg_chkmagic(cgp) || cgp->cg_cs.cs_nifree == 0) {
+               brelse(bp);
                return (NULL);
                return (NULL);
+       }
        cgp->cg_time = time.tv_sec;
        if (ipref) {
                ipref %= fs->fs_ipg;
        cgp->cg_time = time.tv_sec;
        if (ipref) {
                ipref %= fs->fs_ipg;
-               if (isclr(cgp->cg_iused, ipref))
+               if (isclr(cg_inosused(cgp), ipref))
                        goto gotit;
                        goto gotit;
-       } else
-               ipref = cgp->cg_irotor;
-       for (i = 0; i < fs->fs_ipg; i++) {
-               ipref++;
-               if (ipref >= fs->fs_ipg)
-                       ipref = 0;
-               if (isclr(cgp->cg_iused, ipref)) {
+       }
+       start = cgp->cg_irotor / NBBY;
+       len = howmany(fs->fs_ipg - cgp->cg_irotor, NBBY);
+       loc = skpc(0xff, len, &cg_inosused(cgp)[start]);
+       if (loc == 0) {
+               len = start + 1;
+               start = 0;
+               loc = skpc(0xff, len, &cg_inosused(cgp)[0]);
+               if (loc == 0) {
+                       printf("cg = %s, irotor = %d, fs = %s\n",
+                           cg, cgp->cg_irotor, fs->fs_fsmnt);
+                       panic("ialloccg: map corrupted");
+                       /* NOTREACHED */
+               }
+       }
+       i = start + len - loc;
+       map = cg_inosused(cgp)[i];
+       ipref = i * NBBY;
+       for (i = 1; i < (1 << NBBY); i <<= 1, ipref++) {
+               if ((map & i) == 0) {
                        cgp->cg_irotor = ipref;
                        goto gotit;
                }
        }
                        cgp->cg_irotor = ipref;
                        goto gotit;
                }
        }
-       brelse(bp);
-       return (NULL);
+       printf("fs = %s\n", fs->fs_fsmnt);
+       panic("ialloccg: block not in map");
+       /* NOTREACHED */
 gotit:
 gotit:
-       setbit(cgp->cg_iused, ipref);
+       setbit(cg_inosused(cgp), ipref);
        cgp->cg_cs.cs_nifree--;
        fs->fs_cstotal.cs_nifree--;
        fs->fs_cs(fs, cg).cs_nifree--;
        cgp->cg_cs.cs_nifree--;
        fs->fs_cstotal.cs_nifree--;
        fs->fs_cs(fs, cg).cs_nifree--;
@@ -710,67 +862,77 @@ gotit:
  * free map. If a fragment is deallocated, a possible 
  * block reassembly is checked.
  */
  * free map. If a fragment is deallocated, a possible 
  * block reassembly is checked.
  */
-free(ip, bno, size)
+blkfree(ip, bno, size)
        register struct inode *ip;
        daddr_t bno;
        off_t size;
 {
        register struct fs *fs;
        register struct cg *cgp;
        register struct inode *ip;
        daddr_t bno;
        off_t size;
 {
        register struct fs *fs;
        register struct cg *cgp;
-       register struct buf *bp;
-       int cg, blk, frags, bbase;
+       struct buf *bp;
+       int error, 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);
        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");
+               panic("blkfree: bad size");
        }
        cg = dtog(fs, bno);
        if (badblock(fs, bno)) {
                printf("bad block %d, ino %d\n", bno, ip->i_number);
                return;
        }
        }
        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);
+#ifdef SECSIZE
+       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize,
+           fs->fs_dbsize);
+#else SECSIZE
+       error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
+               (int)fs->fs_cgsize, NOCRED, &bp);
+       if (error) {
+               brelse(bp);
+               return;
+       }
+#endif SECSIZE
        cgp = bp->b_un.b_cg;
        cgp = bp->b_un.b_cg;
-       if (bp->b_flags & B_ERROR || cgp->cg_magic != CG_MAGIC) {
+       if (!cg_chkmagic(cgp)) {
                brelse(bp);
                return;
        }
        cgp->cg_time = time.tv_sec;
        bno = dtogd(fs, bno);
        if (size == fs->fs_bsize) {
                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))) {
+               if (isblock(fs, cg_blksfree(cgp), fragstoblks(fs, bno))) {
                        printf("dev = 0x%x, block = %d, fs = %s\n",
                            ip->i_dev, bno, fs->fs_fsmnt);
                        printf("dev = 0x%x, block = %d, fs = %s\n",
                            ip->i_dev, bno, fs->fs_fsmnt);
-                       panic("free: freeing free block");
+                       panic("blkfree: freeing free block");
                }
                }
-               setblock(fs, cgp->cg_free, fragstoblks(fs, bno));
+               setblock(fs, cg_blksfree(cgp), 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_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]++;
+               cg_blks(fs, cgp, i)[cbtorpos(fs, bno)]++;
+               cg_blktot(cgp)[i]++;
        } else {
        } else {
-               bbase = bno - (bno % fs->fs_frag);
+               bbase = bno - fragnum(fs, bno);
                /*
                 * decrement the counts associated with the old frags
                 */
                /*
                 * decrement the counts associated with the old frags
                 */
-               blk = blkmap(fs, cgp->cg_free, bbase);
+               blk = blkmap(fs, cg_blksfree(cgp), bbase);
                fragacct(fs, blk, cgp->cg_frsum, -1);
                /*
                 * deallocate the fragment
                 */
                frags = numfrags(fs, size);
                for (i = 0; i < frags; i++) {
                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)) {
+                       if (isset(cg_blksfree(cgp), bno + i)) {
                                printf("dev = 0x%x, block = %d, fs = %s\n",
                                    ip->i_dev, bno + i, fs->fs_fsmnt);
                                printf("dev = 0x%x, block = %d, fs = %s\n",
                                    ip->i_dev, bno + i, fs->fs_fsmnt);
-                               panic("free: freeing free frag");
+                               panic("blkfree: freeing free frag");
                        }
                        }
-                       setbit(cgp->cg_free, bno + i);
+                       setbit(cg_blksfree(cgp), bno + i);
                }
                cgp->cg_cs.cs_nffree += i;
                fs->fs_cstotal.cs_nffree += i;
                }
                cgp->cg_cs.cs_nffree += i;
                fs->fs_cstotal.cs_nffree += i;
@@ -778,12 +940,13 @@ free(ip, bno, size)
                /*
                 * add back in counts associated with the new frags
                 */
                /*
                 * add back in counts associated with the new frags
                 */
-               blk = blkmap(fs, cgp->cg_free, bbase);
+               blk = blkmap(fs, cg_blksfree(cgp), bbase);
                fragacct(fs, blk, cgp->cg_frsum, 1);
                /*
                 * if a complete block has been reassembled, account for it
                 */
                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))) {
+               if (isblock(fs, cg_blksfree(cgp),
+                   (daddr_t)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_nffree -= fs->fs_frag;
                        fs->fs_cstotal.cs_nffree -= fs->fs_frag;
                        fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
@@ -791,8 +954,8 @@ free(ip, bno, size)
                        fs->fs_cstotal.cs_nbfree++;
                        fs->fs_cs(fs, cg).cs_nbfree++;
                        i = cbtocylno(fs, bbase);
                        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]++;
+                       cg_blks(fs, cgp, i)[cbtorpos(fs, bbase)]++;
+                       cg_blktot(cgp)[i]++;
                }
        }
        fs->fs_fmod++;
                }
        }
        fs->fs_fmod++;
@@ -811,8 +974,8 @@ ifree(ip, ino, mode)
 {
        register struct fs *fs;
        register struct cg *cgp;
 {
        register struct fs *fs;
        register struct cg *cgp;
-       register struct buf *bp;
-       int cg;
+       struct buf *bp;
+       int error, cg;
 
        fs = ip->i_fs;
        if ((unsigned)ino >= fs->fs_ipg*fs->fs_ncg) {
 
        fs = ip->i_fs;
        if ((unsigned)ino >= fs->fs_ipg*fs->fs_ncg) {
@@ -821,20 +984,32 @@ ifree(ip, ino, mode)
                panic("ifree: range");
        }
        cg = itog(fs, ino);
                panic("ifree: range");
        }
        cg = itog(fs, ino);
-       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize);
+#ifdef SECSIZE
+       bp = bread(ip->i_dev, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize,
+           fs->fs_dbsize);
+#else SECSIZE
+       error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)),
+               (int)fs->fs_cgsize, NOCRED, &bp);
+       if (error) {
+               brelse(bp);
+               return;
+       }
+#endif SECSIZE
        cgp = bp->b_un.b_cg;
        cgp = bp->b_un.b_cg;
-       if (bp->b_flags & B_ERROR || cgp->cg_magic != CG_MAGIC) {
+       if (!cg_chkmagic(cgp)) {
                brelse(bp);
                return;
        }
        cgp->cg_time = time.tv_sec;
        ino %= fs->fs_ipg;
                brelse(bp);
                return;
        }
        cgp->cg_time = time.tv_sec;
        ino %= fs->fs_ipg;
-       if (isclr(cgp->cg_iused, ino)) {
+       if (isclr(cg_inosused(cgp), ino)) {
                printf("dev = 0x%x, ino = %d, fs = %s\n",
                    ip->i_dev, ino, fs->fs_fsmnt);
                panic("ifree: freeing free inode");
        }
                printf("dev = 0x%x, ino = %d, fs = %s\n",
                    ip->i_dev, ino, fs->fs_fsmnt);
                panic("ifree: freeing free inode");
        }
-       clrbit(cgp->cg_iused, ino);
+       clrbit(cg_inosused(cgp), ino);
+       if (ino < cgp->cg_irotor)
+               cgp->cg_irotor = ino;
        cgp->cg_cs.cs_nifree++;
        fs->fs_cstotal.cs_nifree++;
        fs->fs_cs(fs, cg).cs_nifree++;
        cgp->cg_cs.cs_nifree++;
        fs->fs_cstotal.cs_nifree++;
        fs->fs_cs(fs, cg).cs_nifree++;
@@ -873,15 +1048,21 @@ mapsearch(fs, cgp, bpref, allocsiz)
        else
                start = cgp->cg_frotor / NBBY;
        len = howmany(fs->fs_fpg, NBBY) - start;
        else
                start = cgp->cg_frotor / NBBY;
        len = howmany(fs->fs_fpg, NBBY) - start;
-       loc = scanc(len, &cgp->cg_free[start], fragtbl[fs->fs_frag],
-               1 << (allocsiz - 1 + (fs->fs_frag % NBBY)));
+       loc = scanc((unsigned)len, (u_char *)&cg_blksfree(cgp)[start],
+               (u_char *)fragtbl[fs->fs_frag],
+               (u_char)(1 << (allocsiz - 1 + (fs->fs_frag % NBBY))));
        if (loc == 0) {
                len = start + 1;
                start = 0;
        if (loc == 0) {
                len = start + 1;
                start = 0;
-               loc = scanc(len, &cgp->cg_free[start], fragtbl[fs->fs_frag],
-                       1 << (allocsiz - 1 + (fs->fs_frag % NBBY)));
-               if (loc == 0)
-                       return (-1);
+               loc = scanc((unsigned)len, (u_char *)&cg_blksfree(cgp)[0],
+                       (u_char *)fragtbl[fs->fs_frag],
+                       (u_char)(1 << (allocsiz - 1 + (fs->fs_frag % NBBY))));
+               if (loc == 0) {
+                       printf("start = %d, len = %d, fs = %s\n",
+                           start, len, fs->fs_fsmnt);
+                       panic("alloccg: map corrupted");
+                       /* NOTREACHED */
+               }
        }
        bno = (start + len - loc) * NBBY;
        cgp->cg_frotor = bno;
        }
        bno = (start + len - loc) * NBBY;
        cgp->cg_frotor = bno;
@@ -890,7 +1071,7 @@ mapsearch(fs, cgp, bpref, allocsiz)
         * sift through the bits to find the selected frag
         */
        for (i = bno + NBBY; bno < i; bno += fs->fs_frag) {
         * sift through the bits to find the selected frag
         */
        for (i = bno + NBBY; bno < i; bno += fs->fs_frag) {
-               blk = blkmap(fs, cgp->cg_free, bno);
+               blk = blkmap(fs, cg_blksfree(cgp), bno);
                blk <<= 1;
                field = around[allocsiz];
                subfield = inside[allocsiz];
                blk <<= 1;
                field = around[allocsiz];
                subfield = inside[allocsiz];
@@ -906,6 +1087,22 @@ mapsearch(fs, cgp, bpref, allocsiz)
        return (-1);
 }
 
        return (-1);
 }
 
+/*
+ * Check that a specified block number is in range.
+ */
+badblock(fs, bn)
+       register struct fs *fs;
+       daddr_t bn;
+{
+
+       if ((unsigned)bn >= fs->fs_size) {
+               printf("bad block %d, ", bn);
+               fserr(fs, "bad block");
+               return (1);
+       }
+       return (0);
+}
+
 /*
  * Fserr prints the name of a file system with an error diagnostic.
  * 
 /*
  * Fserr prints the name of a file system with an error diagnostic.
  * 
@@ -917,5 +1114,5 @@ fserr(fs, cp)
        char *cp;
 {
 
        char *cp;
 {
 
-       printf("%s: %s\n", fs->fs_fsmnt, cp);
+       log(LOG_ERR, "%s: %s\n", fs->fs_fsmnt, cp);
 }
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.