sys/ufs/ffs/ffs_balloc.c

   1 /*-
   2  * Copyright (c) 2002 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by Marshall
   6  * Kirk McKusick and Network Associates Laboratories, the Security
   7  * Research Division of Network Associates, Inc. under DARPA/SPAWAR
   8  * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
   9  * research program
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * Copyright (c) 1982, 1986, 1989, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  *
  59  *      @(#)ffs_balloc.c        8.8 (Berkeley) 6/16/95
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __FBSDID("$FreeBSD$");
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67 #include <sys/bio.h>
  68 #include <sys/buf.h>
  69 #include <sys/lock.h>
  70 #include <sys/mount.h>
  71 #include <sys/vnode.h>
  72
  73 #include <ufs/ufs/quota.h>
  74 #include <ufs/ufs/inode.h>
  75 #include <ufs/ufs/ufs_extern.h>
  76 #include <ufs/ufs/extattr.h>
  77 #include <ufs/ufs/ufsmount.h>
  78
  79 #include <ufs/ffs/fs.h>
  80 #include <ufs/ffs/ffs_extern.h>
  81
  82 /*
  83  * Balloc defines the structure of filesystem storage
  84  * by allocating the physical blocks on a device given
  85  * the inode and the logical block number in a file.
  86  * This is the allocation strategy for UFS1. Below is
  87  * the allocation strategy for UFS2.
  88  */
  89 int
  90 ffs_balloc_ufs1(struct vnode *vp, off_t startoffset, int size,
  91     struct ucred *cred, int flags, struct buf **bpp)
  92 {
  93         struct inode *ip;
  94         struct ufs1_dinode *dp;
  95         ufs_lbn_t lbn, lastlbn;
  96         struct fs *fs;
  97         ufs1_daddr_t nb;
  98         struct buf *bp, *nbp;
  99         struct ufsmount *ump;
 100         struct indir indirs[NIADDR + 2];
 101         int deallocated, osize, nsize, num, i, error;
 102         ufs2_daddr_t newb;
 103         ufs1_daddr_t *bap, pref;
 104         ufs1_daddr_t *allocib, *blkp, *allocblk, allociblk[NIADDR + 1];
 105         ufs2_daddr_t *lbns_remfree, lbns[NIADDR + 1];
 106         int unwindidx = -1;
 107         int saved_inbdflush;
 108         static struct timeval lastfail;
 109         static int curfail;
 110         int gbflags, reclaimed;
 111
 112         ip = VTOI(vp);
 113         dp = ip->i_din1;
 114         fs = ip->i_fs;
 115         ump = ip->i_ump;
 116         lbn = lblkno(fs, startoffset);
 117         size = blkoff(fs, startoffset) + size;
 118         reclaimed = 0;
 119         if (size > fs->fs_bsize)
 120                 panic("ffs_balloc_ufs1: blk too big");
 121         *bpp = NULL;
 122         if (flags & IO_EXT)
 123                 return (EOPNOTSUPP);
 124         if (lbn < 0)
 125                 return (EFBIG);
 126         gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;
 127
 128         if (DOINGSOFTDEP(vp))
 129                 softdep_prealloc(vp, MNT_WAIT);
 130         /*
 131          * If the next write will extend the file into a new block,
 132          * and the file is currently composed of a fragment
 133          * this fragment has to be extended to be a full block.
 134          */
 135         lastlbn = lblkno(fs, ip->i_size);
 136         if (lastlbn < NDADDR && lastlbn < lbn) {
 137                 nb = lastlbn;
 138                 osize = blksize(fs, ip, nb);
 139                 if (osize < fs->fs_bsize && osize > 0) {
 140                         UFS_LOCK(ump);
 141                         error = ffs_realloccg(ip, nb, dp->di_db[nb],
 142                            ffs_blkpref_ufs1(ip, lastlbn, (int)nb,
 143                            &dp->di_db[0]), osize, (int)fs->fs_bsize, flags,
 144                            cred, &bp);
 145                         if (error)
 146                                 return (error);
 147                         if (DOINGSOFTDEP(vp))
 148                                 softdep_setup_allocdirect(ip, nb,
 149                                     dbtofsb(fs, bp->b_blkno), dp->di_db[nb],
 150                                     fs->fs_bsize, osize, bp);
 151                         ip->i_size = smalllblktosize(fs, nb + 1);
 152                         dp->di_size = ip->i_size;
 153                         dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);
 154                         ip->i_flag |= IN_CHANGE | IN_UPDATE;
 155                         if (flags & IO_SYNC)
 156                                 bwrite(bp);
 157                         else
 158                                 bawrite(bp);
 159                 }
 160         }
 161         /*
 162          * The first NDADDR blocks are direct blocks
 163          */
 164         if (lbn < NDADDR) {
 165                 if (flags & BA_METAONLY)
 166                         panic("ffs_balloc_ufs1: BA_METAONLY for direct block");
 167                 nb = dp->di_db[lbn];
 168                 if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {
 169                         error = bread(vp, lbn, fs->fs_bsize, NOCRED, &bp);
 170                         if (error) {
 171                                 brelse(bp);
 172                                 return (error);
 173                         }
 174                         bp->b_blkno = fsbtodb(fs, nb);
 175                         *bpp = bp;
 176                         return (0);
 177                 }
 178                 if (nb != 0) {
 179                         /*
 180                          * Consider need to reallocate a fragment.
 181                          */
 182                         osize = fragroundup(fs, blkoff(fs, ip->i_size));
 183                         nsize = fragroundup(fs, size);
 184                         if (nsize <= osize) {
 185                                 error = bread(vp, lbn, osize, NOCRED, &bp);
 186                                 if (error) {
 187                                         brelse(bp);
 188                                         return (error);
 189                                 }
 190                                 bp->b_blkno = fsbtodb(fs, nb);
 191                         } else {
 192                                 UFS_LOCK(ump);
 193                                 error = ffs_realloccg(ip, lbn, dp->di_db[lbn],
 194                                     ffs_blkpref_ufs1(ip, lbn, (int)lbn,
 195                                     &dp->di_db[0]), osize, nsize, flags,
 196                                     cred, &bp);
 197                                 if (error)
 198                                         return (error);
 199                                 if (DOINGSOFTDEP(vp))
 200                                         softdep_setup_allocdirect(ip, lbn,
 201                                             dbtofsb(fs, bp->b_blkno), nb,
 202                                             nsize, osize, bp);
 203                         }
 204                 } else {
 205                         if (ip->i_size < smalllblktosize(fs, lbn + 1))
 206                                 nsize = fragroundup(fs, size);
 207                         else
 208                                 nsize = fs->fs_bsize;
 209                         UFS_LOCK(ump);
 210                         error = ffs_alloc(ip, lbn,
 211                             ffs_blkpref_ufs1(ip, lbn, (int)lbn, &dp->di_db[0]),
 212                             nsize, flags, cred, &newb);
 213                         if (error)
 214                                 return (error);
 215                         bp = getblk(vp, lbn, nsize, 0, 0, gbflags);
 216                         bp->b_blkno = fsbtodb(fs, newb);
 217                         if (flags & BA_CLRBUF)
 218                                 vfs_bio_clrbuf(bp);
 219                         if (DOINGSOFTDEP(vp))
 220                                 softdep_setup_allocdirect(ip, lbn, newb, 0,
 221                                     nsize, 0, bp);
 222                 }
 223                 dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
 224                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 225                 *bpp = bp;
 226                 return (0);
 227         }
 228         /*
 229          * Determine the number of levels of indirection.
 230          */
 231         pref = 0;
 232         if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
 233                 return(error);
 234 #ifdef INVARIANTS
 235         if (num < 1)
 236                 panic ("ffs_balloc_ufs1: ufs_getlbns returned indirect block");
 237 #endif
 238         saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);
 239         /*
 240          * Fetch the first indirect block allocating if necessary.
 241          */
 242         --num;
 243         nb = dp->di_ib[indirs[0].in_off];
 244         allocib = NULL;
 245         allocblk = allociblk;
 246         lbns_remfree = lbns;
 247         if (nb == 0) {
 248                 UFS_LOCK(ump);
 249                 pref = ffs_blkpref_ufs1(ip, lbn, -indirs[0].in_off - 1,
 250                     (ufs1_daddr_t *)0);
 251                 if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 252                     flags, cred, &newb)) != 0) {
 253                         curthread_pflags_restore(saved_inbdflush);
 254                         return (error);
 255                 }
 256                 pref = newb + fs->fs_frag;
 257                 nb = newb;
 258                 MPASS(allocblk < allociblk + nitems(allociblk));
 259                 MPASS(lbns_remfree < lbns + nitems(lbns));
 260                 *allocblk++ = nb;
 261                 *lbns_remfree++ = indirs[1].in_lbn;
 262                 bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0, gbflags);
 263                 bp->b_blkno = fsbtodb(fs, nb);
 264                 vfs_bio_clrbuf(bp);
 265                 if (DOINGSOFTDEP(vp)) {
 266                         softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
 267                             newb, 0, fs->fs_bsize, 0, bp);
 268                         bdwrite(bp);
 269                 } else {
 270                         /*
 271                          * Write synchronously so that indirect blocks
 272                          * never point at garbage.
 273                          */
 274                         if (DOINGASYNC(vp))
 275                                 bdwrite(bp);
 276                         else if ((error = bwrite(bp)) != 0)
 277                                 goto fail;
 278                 }
 279                 allocib = &dp->di_ib[indirs[0].in_off];
 280                 *allocib = nb;
 281                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 282         }
 283         /*
 284          * Fetch through the indirect blocks, allocating as necessary.
 285          */
 286 retry:
 287         for (i = 1;;) {
 288                 error = bread(vp,
 289                     indirs[i].in_lbn, (int)fs->fs_bsize, NOCRED, &bp);
 290                 if (error) {
 291                         brelse(bp);
 292                         goto fail;
 293                 }
 294                 bap = (ufs1_daddr_t *)bp->b_data;
 295                 nb = bap[indirs[i].in_off];
 296                 if (i == num)
 297                         break;
 298                 i += 1;
 299                 if (nb != 0) {
 300                         bqrelse(bp);
 301                         continue;
 302                 }
 303                 UFS_LOCK(ump);
 304                 /*
 305                  * If parent indirect has just been allocated, try to cluster
 306                  * immediately following it.
 307                  */
 308                 if (pref == 0)
 309                         pref = ffs_blkpref_ufs1(ip, lbn, i - num - 1,
 310                             (ufs1_daddr_t *)0);
 311                 if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 312                     flags | IO_BUFLOCKED, cred, &newb)) != 0) {
 313                         brelse(bp);
 314                         if (DOINGSOFTDEP(vp) && ++reclaimed == 1) {
 315                                 UFS_LOCK(ump);
 316                                 softdep_request_cleanup(fs, vp, cred,
 317                                     FLUSH_BLOCKS_WAIT);
 318                                 UFS_UNLOCK(ump);
 319                                 goto retry;
 320                         }
 321                         if (ppsratecheck(&lastfail, &curfail, 1)) {
 322                                 ffs_fserr(fs, ip->i_number, "filesystem full");
 323                                 uprintf("\n%s: write failed, filesystem "
 324                                     "is full\n", fs->fs_fsmnt);
 325                         }
 326                         goto fail;
 327                 }
 328                 pref = newb + fs->fs_frag;
 329                 nb = newb;
 330                 MPASS(allocblk < allociblk + nitems(allociblk));
 331                 MPASS(lbns_remfree < lbns + nitems(lbns));
 332                 *allocblk++ = nb;
 333                 *lbns_remfree++ = indirs[i].in_lbn;
 334                 nbp = getblk(vp, indirs[i].in_lbn, fs->fs_bsize, 0, 0, 0);
 335                 nbp->b_blkno = fsbtodb(fs, nb);
 336                 vfs_bio_clrbuf(nbp);
 337                 if (DOINGSOFTDEP(vp)) {
 338                         softdep_setup_allocindir_meta(nbp, ip, bp,
 339                             indirs[i - 1].in_off, nb);
 340                         bdwrite(nbp);
 341                 } else {
 342                         /*
 343                          * Write synchronously so that indirect blocks
 344                          * never point at garbage.
 345                          */
 346                         if ((error = bwrite(nbp)) != 0) {
 347                                 brelse(bp);
 348                                 goto fail;
 349                         }
 350                 }
 351                 bap[indirs[i - 1].in_off] = nb;
 352                 if (allocib == NULL && unwindidx < 0)
 353                         unwindidx = i - 1;
 354                 /*
 355                  * If required, write synchronously, otherwise use
 356                  * delayed write.
 357                  */
 358                 if (flags & IO_SYNC) {
 359                         bwrite(bp);
 360                 } else {
 361                         if (bp->b_bufsize == fs->fs_bsize)
 362                                 bp->b_flags |= B_CLUSTEROK;
 363                         bdwrite(bp);
 364                 }
 365         }
 366         /*
 367          * If asked only for the indirect block, then return it.
 368          */
 369         if (flags & BA_METAONLY) {
 370                 curthread_pflags_restore(saved_inbdflush);
 371                 *bpp = bp;
 372                 return (0);
 373         }
 374         /*
 375          * Get the data block, allocating if necessary.
 376          */
 377         if (nb == 0) {
 378                 UFS_LOCK(ump);
 379                 /*
 380                  * If allocating metadata at the front of the cylinder
 381                  * group and parent indirect block has just been allocated,
 382                  * then cluster next to it if it is the first indirect in
 383                  * the file. Otherwise it has been allocated in the metadata
 384                  * area, so we want to find our own place out in the data area.
 385                  */
 386                 if (pref == 0 || (lbn > NDADDR && fs->fs_metaspace != 0))
 387                         pref = ffs_blkpref_ufs1(ip, lbn, indirs[i].in_off,
 388                             &bap[0]);
 389                 error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 390                     flags | IO_BUFLOCKED, cred, &newb);
 391                 if (error) {
 392                         brelse(bp);
 393                         if (DOINGSOFTDEP(vp) && ++reclaimed == 1) {
 394                                 UFS_LOCK(ump);
 395                                 softdep_request_cleanup(fs, vp, cred,
 396                                     FLUSH_BLOCKS_WAIT);
 397                                 UFS_UNLOCK(ump);
 398                                 goto retry;
 399                         }
 400                         if (ppsratecheck(&lastfail, &curfail, 1)) {
 401                                 ffs_fserr(fs, ip->i_number, "filesystem full");
 402                                 uprintf("\n%s: write failed, filesystem "
 403                                     "is full\n", fs->fs_fsmnt);
 404                         }
 405                         goto fail;
 406                 }
 407                 nb = newb;
 408                 MPASS(allocblk < allociblk + nitems(allociblk));
 409                 MPASS(lbns_remfree < lbns + nitems(lbns));
 410                 *allocblk++ = nb;
 411                 *lbns_remfree++ = lbn;
 412                 nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
 413                 nbp->b_blkno = fsbtodb(fs, nb);
 414                 if (flags & BA_CLRBUF)
 415                         vfs_bio_clrbuf(nbp);
 416                 if (DOINGSOFTDEP(vp))
 417                         softdep_setup_allocindir_page(ip, lbn, bp,
 418                             indirs[i].in_off, nb, 0, nbp);
 419                 bap[indirs[i].in_off] = nb;
 420                 /*
 421                  * If required, write synchronously, otherwise use
 422                  * delayed write.
 423                  */
 424                 if (flags & IO_SYNC) {
 425                         bwrite(bp);
 426                 } else {
 427                         if (bp->b_bufsize == fs->fs_bsize)
 428                                 bp->b_flags |= B_CLUSTEROK;
 429                         bdwrite(bp);
 430                 }
 431                 curthread_pflags_restore(saved_inbdflush);
 432                 *bpp = nbp;
 433                 return (0);
 434         }
 435         brelse(bp);
 436         if (flags & BA_CLRBUF) {
 437                 int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
 438                 if (seqcount != 0 &&
 439                     (vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0 &&
 440                     !(vm_page_count_severe() || buf_dirty_count_severe())) {
 441                         error = cluster_read(vp, ip->i_size, lbn,
 442                             (int)fs->fs_bsize, NOCRED,
 443                             MAXBSIZE, seqcount, gbflags, &nbp);
 444                 } else {
 445                         error = bread_gb(vp, lbn, (int)fs->fs_bsize, NOCRED,
 446                             gbflags, &nbp);
 447                 }
 448                 if (error) {
 449                         brelse(nbp);
 450                         goto fail;
 451                 }
 452         } else {
 453                 nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
 454                 nbp->b_blkno = fsbtodb(fs, nb);
 455         }
 456         curthread_pflags_restore(saved_inbdflush);
 457         *bpp = nbp;
 458         return (0);
 459 fail:
 460         curthread_pflags_restore(saved_inbdflush);
 461         /*
 462          * If we have failed to allocate any blocks, simply return the error.
 463          * This is the usual case and avoids the need to fsync the file.
 464          */
 465         if (allocblk == allociblk && allocib == NULL && unwindidx == -1)
 466                 return (error);
 467         /*
 468          * If we have failed part way through block allocation, we
 469          * have to deallocate any indirect blocks that we have allocated.
 470          * We have to fsync the file before we start to get rid of all
 471          * of its dependencies so that we do not leave them dangling.
 472          * We have to sync it at the end so that the soft updates code
 473          * does not find any untracked changes. Although this is really
 474          * slow, running out of disk space is not expected to be a common
 475          * occurrence. The error return from fsync is ignored as we already
 476          * have an error to return to the user.
 477          *
 478          * XXX Still have to journal the free below
 479          */
 480         (void) ffs_syncvnode(vp, MNT_WAIT, 0);
 481         for (deallocated = 0, blkp = allociblk, lbns_remfree = lbns;
 482              blkp < allocblk; blkp++, lbns_remfree++) {
 483                 /*
 484                  * We shall not leave the freed blocks on the vnode
 485                  * buffer object lists.
 486                  */
 487                 bp = getblk(vp, *lbns_remfree, fs->fs_bsize, 0, 0, GB_NOCREAT);
 488                 if (bp != NULL) {
 489                         bp->b_flags |= (B_INVAL | B_RELBUF);
 490                         bp->b_flags &= ~B_ASYNC;
 491                         brelse(bp);
 492                 }
 493                 deallocated += fs->fs_bsize;
 494         }
 495         if (allocib != NULL) {
 496                 *allocib = 0;
 497         } else if (unwindidx >= 0) {
 498                 int r;
 499
 500                 r = bread(vp, indirs[unwindidx].in_lbn,
 501                     (int)fs->fs_bsize, NOCRED, &bp);
 502                 if (r) {
 503                         panic("Could not unwind indirect block, error %d", r);
 504                         brelse(bp);
 505                 } else {
 506                         bap = (ufs1_daddr_t *)bp->b_data;
 507                         bap[indirs[unwindidx].in_off] = 0;
 508                         if (flags & IO_SYNC) {
 509                                 bwrite(bp);
 510                         } else {
 511                                 if (bp->b_bufsize == fs->fs_bsize)
 512                                         bp->b_flags |= B_CLUSTEROK;
 513                                 bdwrite(bp);
 514                         }
 515                 }
 516         }
 517         if (deallocated) {
 518 #ifdef QUOTA
 519                 /*
 520                  * Restore user's disk quota because allocation failed.
 521                  */
 522                 (void) chkdq(ip, -btodb(deallocated), cred, FORCE);
 523 #endif
 524                 dp->di_blocks -= btodb(deallocated);
 525                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 526         }
 527         (void) ffs_syncvnode(vp, MNT_WAIT, 0);
 528         /*
 529          * After the buffers are invalidated and on-disk pointers are
 530          * cleared, free the blocks.
 531          */
 532         for (blkp = allociblk; blkp < allocblk; blkp++) {
 533                 ffs_blkfree(ump, fs, ip->i_devvp, *blkp, fs->fs_bsize,
 534                     ip->i_number, vp->v_type, NULL);
 535         }
 536         return (error);
 537 }
 538
 539 /*
 540  * Balloc defines the structure of file system storage
 541  * by allocating the physical blocks on a device given
 542  * the inode and the logical block number in a file.
 543  * This is the allocation strategy for UFS2. Above is
 544  * the allocation strategy for UFS1.
 545  */
 546 int
 547 ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
 548     struct ucred *cred, int flags, struct buf **bpp)
 549 {
 550         struct inode *ip;
 551         struct ufs2_dinode *dp;
 552         ufs_lbn_t lbn, lastlbn;
 553         struct fs *fs;
 554         struct buf *bp, *nbp;
 555         struct ufsmount *ump;
 556         struct indir indirs[NIADDR + 2];
 557         ufs2_daddr_t nb, newb, *bap, pref;
 558         ufs2_daddr_t *allocib, *blkp, *allocblk, allociblk[NIADDR + 1];
 559         ufs2_daddr_t *lbns_remfree, lbns[NIADDR + 1];
 560         int deallocated, osize, nsize, num, i, error;
 561         int unwindidx = -1;
 562         int saved_inbdflush;
 563         static struct timeval lastfail;
 564         static int curfail;
 565         int gbflags, reclaimed;
 566
 567         ip = VTOI(vp);
 568         dp = ip->i_din2;
 569         fs = ip->i_fs;
 570         ump = ip->i_ump;
 571         lbn = lblkno(fs, startoffset);
 572         size = blkoff(fs, startoffset) + size;
 573         reclaimed = 0;
 574         if (size > fs->fs_bsize)
 575                 panic("ffs_balloc_ufs2: blk too big");
 576         *bpp = NULL;
 577         if (lbn < 0)
 578                 return (EFBIG);
 579         gbflags = (flags & BA_UNMAPPED) != 0 ? GB_UNMAPPED : 0;
 580
 581         if (DOINGSOFTDEP(vp))
 582                 softdep_prealloc(vp, MNT_WAIT);
 583
 584         /*
 585          * Check for allocating external data.
 586          */
 587         if (flags & IO_EXT) {
 588                 if (lbn >= NXADDR)
 589                         return (EFBIG);
 590                 /*
 591                  * If the next write will extend the data into a new block,
 592                  * and the data is currently composed of a fragment
 593                  * this fragment has to be extended to be a full block.
 594                  */
 595                 lastlbn = lblkno(fs, dp->di_extsize);
 596                 if (lastlbn < lbn) {
 597                         nb = lastlbn;
 598                         osize = sblksize(fs, dp->di_extsize, nb);
 599                         if (osize < fs->fs_bsize && osize > 0) {
 600                                 UFS_LOCK(ump);
 601                                 error = ffs_realloccg(ip, -1 - nb,
 602                                     dp->di_extb[nb],
 603                                     ffs_blkpref_ufs2(ip, lastlbn, (int)nb,
 604                                     &dp->di_extb[0]), osize,
 605                                     (int)fs->fs_bsize, flags, cred, &bp);
 606                                 if (error)
 607                                         return (error);
 608                                 if (DOINGSOFTDEP(vp))
 609                                         softdep_setup_allocext(ip, nb,
 610                                             dbtofsb(fs, bp->b_blkno),
 611                                             dp->di_extb[nb],
 612                                             fs->fs_bsize, osize, bp);
 613                                 dp->di_extsize = smalllblktosize(fs, nb + 1);
 614                                 dp->di_extb[nb] = dbtofsb(fs, bp->b_blkno);
 615                                 bp->b_xflags |= BX_ALTDATA;
 616                                 ip->i_flag |= IN_CHANGE;
 617                                 if (flags & IO_SYNC)
 618                                         bwrite(bp);
 619                                 else
 620                                         bawrite(bp);
 621                         }
 622                 }
 623                 /*
 624                  * All blocks are direct blocks
 625                  */
 626                 if (flags & BA_METAONLY)
 627                         panic("ffs_balloc_ufs2: BA_METAONLY for ext block");
 628                 nb = dp->di_extb[lbn];
 629                 if (nb != 0 && dp->di_extsize >= smalllblktosize(fs, lbn + 1)) {
 630                         error = bread_gb(vp, -1 - lbn, fs->fs_bsize, NOCRED,
 631                             gbflags, &bp);
 632                         if (error) {
 633                                 brelse(bp);
 634                                 return (error);
 635                         }
 636                         bp->b_blkno = fsbtodb(fs, nb);
 637                         bp->b_xflags |= BX_ALTDATA;
 638                         *bpp = bp;
 639                         return (0);
 640                 }
 641                 if (nb != 0) {
 642                         /*
 643                          * Consider need to reallocate a fragment.
 644                          */
 645                         osize = fragroundup(fs, blkoff(fs, dp->di_extsize));
 646                         nsize = fragroundup(fs, size);
 647                         if (nsize <= osize) {
 648                                 error = bread_gb(vp, -1 - lbn, osize, NOCRED,
 649                                     gbflags, &bp);
 650                                 if (error) {
 651                                         brelse(bp);
 652                                         return (error);
 653                                 }
 654                                 bp->b_blkno = fsbtodb(fs, nb);
 655                                 bp->b_xflags |= BX_ALTDATA;
 656                         } else {
 657                                 UFS_LOCK(ump);
 658                                 error = ffs_realloccg(ip, -1 - lbn,
 659                                     dp->di_extb[lbn],
 660                                     ffs_blkpref_ufs2(ip, lbn, (int)lbn,
 661                                     &dp->di_extb[0]), osize, nsize, flags,
 662                                     cred, &bp);
 663                                 if (error)
 664                                         return (error);
 665                                 bp->b_xflags |= BX_ALTDATA;
 666                                 if (DOINGSOFTDEP(vp))
 667                                         softdep_setup_allocext(ip, lbn,
 668                                             dbtofsb(fs, bp->b_blkno), nb,
 669                                             nsize, osize, bp);
 670                         }
 671                 } else {
 672                         if (dp->di_extsize < smalllblktosize(fs, lbn + 1))
 673                                 nsize = fragroundup(fs, size);
 674                         else
 675                                 nsize = fs->fs_bsize;
 676                         UFS_LOCK(ump);
 677                         error = ffs_alloc(ip, lbn,
 678                            ffs_blkpref_ufs2(ip, lbn, (int)lbn, &dp->di_extb[0]),
 679                            nsize, flags, cred, &newb);
 680                         if (error)
 681                                 return (error);
 682                         bp = getblk(vp, -1 - lbn, nsize, 0, 0, gbflags);
 683                         bp->b_blkno = fsbtodb(fs, newb);
 684                         bp->b_xflags |= BX_ALTDATA;
 685                         if (flags & BA_CLRBUF)
 686                                 vfs_bio_clrbuf(bp);
 687                         if (DOINGSOFTDEP(vp))
 688                                 softdep_setup_allocext(ip, lbn, newb, 0,
 689                                     nsize, 0, bp);
 690                 }
 691                 dp->di_extb[lbn] = dbtofsb(fs, bp->b_blkno);
 692                 ip->i_flag |= IN_CHANGE;
 693                 *bpp = bp;
 694                 return (0);
 695         }
 696         /*
 697          * If the next write will extend the file into a new block,
 698          * and the file is currently composed of a fragment
 699          * this fragment has to be extended to be a full block.
 700          */
 701         lastlbn = lblkno(fs, ip->i_size);
 702         if (lastlbn < NDADDR && lastlbn < lbn) {
 703                 nb = lastlbn;
 704                 osize = blksize(fs, ip, nb);
 705                 if (osize < fs->fs_bsize && osize > 0) {
 706                         UFS_LOCK(ump);
 707                         error = ffs_realloccg(ip, nb, dp->di_db[nb],
 708                             ffs_blkpref_ufs2(ip, lastlbn, (int)nb,
 709                             &dp->di_db[0]), osize, (int)fs->fs_bsize,
 710                             flags, cred, &bp);
 711                         if (error)
 712                                 return (error);
 713                         if (DOINGSOFTDEP(vp))
 714                                 softdep_setup_allocdirect(ip, nb,
 715                                     dbtofsb(fs, bp->b_blkno),
 716                                     dp->di_db[nb],
 717                                     fs->fs_bsize, osize, bp);
 718                         ip->i_size = smalllblktosize(fs, nb + 1);
 719                         dp->di_size = ip->i_size;
 720                         dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);
 721                         ip->i_flag |= IN_CHANGE | IN_UPDATE;
 722                         if (flags & IO_SYNC)
 723                                 bwrite(bp);
 724                         else
 725                                 bawrite(bp);
 726                 }
 727         }
 728         /*
 729          * The first NDADDR blocks are direct blocks
 730          */
 731         if (lbn < NDADDR) {
 732                 if (flags & BA_METAONLY)
 733                         panic("ffs_balloc_ufs2: BA_METAONLY for direct block");
 734                 nb = dp->di_db[lbn];
 735                 if (nb != 0 && ip->i_size >= smalllblktosize(fs, lbn + 1)) {
 736                         error = bread_gb(vp, lbn, fs->fs_bsize, NOCRED,
 737                             gbflags, &bp);
 738                         if (error) {
 739                                 brelse(bp);
 740                                 return (error);
 741                         }
 742                         bp->b_blkno = fsbtodb(fs, nb);
 743                         *bpp = bp;
 744                         return (0);
 745                 }
 746                 if (nb != 0) {
 747                         /*
 748                          * Consider need to reallocate a fragment.
 749                          */
 750                         osize = fragroundup(fs, blkoff(fs, ip->i_size));
 751                         nsize = fragroundup(fs, size);
 752                         if (nsize <= osize) {
 753                                 error = bread_gb(vp, lbn, osize, NOCRED,
 754                                     gbflags, &bp);
 755                                 if (error) {
 756                                         brelse(bp);
 757                                         return (error);
 758                                 }
 759                                 bp->b_blkno = fsbtodb(fs, nb);
 760                         } else {
 761                                 UFS_LOCK(ump);
 762                                 error = ffs_realloccg(ip, lbn, dp->di_db[lbn],
 763                                     ffs_blkpref_ufs2(ip, lbn, (int)lbn,
 764                                     &dp->di_db[0]), osize, nsize, flags,
 765                                     cred, &bp);
 766                                 if (error)
 767                                         return (error);
 768                                 if (DOINGSOFTDEP(vp))
 769                                         softdep_setup_allocdirect(ip, lbn,
 770                                             dbtofsb(fs, bp->b_blkno), nb,
 771                                             nsize, osize, bp);
 772                         }
 773                 } else {
 774                         if (ip->i_size < smalllblktosize(fs, lbn + 1))
 775                                 nsize = fragroundup(fs, size);
 776                         else
 777                                 nsize = fs->fs_bsize;
 778                         UFS_LOCK(ump);
 779                         error = ffs_alloc(ip, lbn,
 780                             ffs_blkpref_ufs2(ip, lbn, (int)lbn,
 781                                 &dp->di_db[0]), nsize, flags, cred, &newb);
 782                         if (error)
 783                                 return (error);
 784                         bp = getblk(vp, lbn, nsize, 0, 0, gbflags);
 785                         bp->b_blkno = fsbtodb(fs, newb);
 786                         if (flags & BA_CLRBUF)
 787                                 vfs_bio_clrbuf(bp);
 788                         if (DOINGSOFTDEP(vp))
 789                                 softdep_setup_allocdirect(ip, lbn, newb, 0,
 790                                     nsize, 0, bp);
 791                 }
 792                 dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
 793                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 794                 *bpp = bp;
 795                 return (0);
 796         }
 797         /*
 798          * Determine the number of levels of indirection.
 799          */
 800         pref = 0;
 801         if ((error = ufs_getlbns(vp, lbn, indirs, &num)) != 0)
 802                 return(error);
 803 #ifdef INVARIANTS
 804         if (num < 1)
 805                 panic ("ffs_balloc_ufs2: ufs_getlbns returned indirect block");
 806 #endif
 807         saved_inbdflush = curthread_pflags_set(TDP_INBDFLUSH);
 808         /*
 809          * Fetch the first indirect block allocating if necessary.
 810          */
 811         --num;
 812         nb = dp->di_ib[indirs[0].in_off];
 813         allocib = NULL;
 814         allocblk = allociblk;
 815         lbns_remfree = lbns;
 816         if (nb == 0) {
 817                 UFS_LOCK(ump);
 818                 pref = ffs_blkpref_ufs2(ip, lbn, -indirs[0].in_off - 1,
 819                     (ufs2_daddr_t *)0);
 820                 if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 821                     flags, cred, &newb)) != 0) {
 822                         curthread_pflags_restore(saved_inbdflush);
 823                         return (error);
 824                 }
 825                 pref = newb + fs->fs_frag;
 826                 nb = newb;
 827                 MPASS(allocblk < allociblk + nitems(allociblk));
 828                 MPASS(lbns_remfree < lbns + nitems(lbns));
 829                 *allocblk++ = nb;
 830                 *lbns_remfree++ = indirs[1].in_lbn;
 831                 bp = getblk(vp, indirs[1].in_lbn, fs->fs_bsize, 0, 0,
 832                     GB_UNMAPPED);
 833                 bp->b_blkno = fsbtodb(fs, nb);
 834                 vfs_bio_clrbuf(bp);
 835                 if (DOINGSOFTDEP(vp)) {
 836                         softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
 837                             newb, 0, fs->fs_bsize, 0, bp);
 838                         bdwrite(bp);
 839                 } else {
 840                         /*
 841                          * Write synchronously so that indirect blocks
 842                          * never point at garbage.
 843                          */
 844                         if (DOINGASYNC(vp))
 845                                 bdwrite(bp);
 846                         else if ((error = bwrite(bp)) != 0)
 847                                 goto fail;
 848                 }
 849                 allocib = &dp->di_ib[indirs[0].in_off];
 850                 *allocib = nb;
 851                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 852         }
 853         /*
 854          * Fetch through the indirect blocks, allocating as necessary.
 855          */
 856 retry:
 857         for (i = 1;;) {
 858                 error = bread(vp,
 859                     indirs[i].in_lbn, (int)fs->fs_bsize, NOCRED, &bp);
 860                 if (error) {
 861                         brelse(bp);
 862                         goto fail;
 863                 }
 864                 bap = (ufs2_daddr_t *)bp->b_data;
 865                 nb = bap[indirs[i].in_off];
 866                 if (i == num)
 867                         break;
 868                 i += 1;
 869                 if (nb != 0) {
 870                         bqrelse(bp);
 871                         continue;
 872                 }
 873                 UFS_LOCK(ump);
 874                 /*
 875                  * If parent indirect has just been allocated, try to cluster
 876                  * immediately following it.
 877                  */
 878                 if (pref == 0)
 879                         pref = ffs_blkpref_ufs2(ip, lbn, i - num - 1,
 880                             (ufs2_daddr_t *)0);
 881                 if ((error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 882                     flags | IO_BUFLOCKED, cred, &newb)) != 0) {
 883                         brelse(bp);
 884                         if (DOINGSOFTDEP(vp) && ++reclaimed == 1) {
 885                                 UFS_LOCK(ump);
 886                                 softdep_request_cleanup(fs, vp, cred,
 887                                     FLUSH_BLOCKS_WAIT);
 888                                 UFS_UNLOCK(ump);
 889                                 goto retry;
 890                         }
 891                         if (ppsratecheck(&lastfail, &curfail, 1)) {
 892                                 ffs_fserr(fs, ip->i_number, "filesystem full");
 893                                 uprintf("\n%s: write failed, filesystem "
 894                                     "is full\n", fs->fs_fsmnt);
 895                         }
 896                         goto fail;
 897                 }
 898                 pref = newb + fs->fs_frag;
 899                 nb = newb;
 900                 MPASS(allocblk < allociblk + nitems(allociblk));
 901                 MPASS(lbns_remfree < lbns + nitems(lbns));
 902                 *allocblk++ = nb;
 903                 *lbns_remfree++ = indirs[i].in_lbn;
 904                 nbp = getblk(vp, indirs[i].in_lbn, fs->fs_bsize, 0, 0,
 905                     GB_UNMAPPED);
 906                 nbp->b_blkno = fsbtodb(fs, nb);
 907                 vfs_bio_clrbuf(nbp);
 908                 if (DOINGSOFTDEP(vp)) {
 909                         softdep_setup_allocindir_meta(nbp, ip, bp,
 910                             indirs[i - 1].in_off, nb);
 911                         bdwrite(nbp);
 912                 } else {
 913                         /*
 914                          * Write synchronously so that indirect blocks
 915                          * never point at garbage.
 916                          */
 917                         if ((error = bwrite(nbp)) != 0) {
 918                                 brelse(bp);
 919                                 goto fail;
 920                         }
 921                 }
 922                 bap[indirs[i - 1].in_off] = nb;
 923                 if (allocib == NULL && unwindidx < 0)
 924                         unwindidx = i - 1;
 925                 /*
 926                  * If required, write synchronously, otherwise use
 927                  * delayed write.
 928                  */
 929                 if (flags & IO_SYNC) {
 930                         bwrite(bp);
 931                 } else {
 932                         if (bp->b_bufsize == fs->fs_bsize)
 933                                 bp->b_flags |= B_CLUSTEROK;
 934                         bdwrite(bp);
 935                 }
 936         }
 937         /*
 938          * If asked only for the indirect block, then return it.
 939          */
 940         if (flags & BA_METAONLY) {
 941                 curthread_pflags_restore(saved_inbdflush);
 942                 *bpp = bp;
 943                 return (0);
 944         }
 945         /*
 946          * Get the data block, allocating if necessary.
 947          */
 948         if (nb == 0) {
 949                 UFS_LOCK(ump);
 950                 /*
 951                  * If allocating metadata at the front of the cylinder
 952                  * group and parent indirect block has just been allocated,
 953                  * then cluster next to it if it is the first indirect in
 954                  * the file. Otherwise it has been allocated in the metadata
 955                  * area, so we want to find our own place out in the data area.
 956                  */
 957                 if (pref == 0 || (lbn > NDADDR && fs->fs_metaspace != 0))
 958                         pref = ffs_blkpref_ufs2(ip, lbn, indirs[i].in_off,
 959                             &bap[0]);
 960                 error = ffs_alloc(ip, lbn, pref, (int)fs->fs_bsize,
 961                     flags | IO_BUFLOCKED, cred, &newb);
 962                 if (error) {
 963                         brelse(bp);
 964                         if (DOINGSOFTDEP(vp) && ++reclaimed == 1) {
 965                                 UFS_LOCK(ump);
 966                                 softdep_request_cleanup(fs, vp, cred,
 967                                     FLUSH_BLOCKS_WAIT);
 968                                 UFS_UNLOCK(ump);
 969                                 goto retry;
 970                         }
 971                         if (ppsratecheck(&lastfail, &curfail, 1)) {
 972                                 ffs_fserr(fs, ip->i_number, "filesystem full");
 973                                 uprintf("\n%s: write failed, filesystem "
 974                                     "is full\n", fs->fs_fsmnt);
 975                         }
 976                         goto fail;
 977                 }
 978                 nb = newb;
 979                 MPASS(allocblk < allociblk + nitems(allociblk));
 980                 MPASS(lbns_remfree < lbns + nitems(lbns));
 981                 *allocblk++ = nb;
 982                 *lbns_remfree++ = lbn;
 983                 nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
 984                 nbp->b_blkno = fsbtodb(fs, nb);
 985                 if (flags & BA_CLRBUF)
 986                         vfs_bio_clrbuf(nbp);
 987                 if (DOINGSOFTDEP(vp))
 988                         softdep_setup_allocindir_page(ip, lbn, bp,
 989                             indirs[i].in_off, nb, 0, nbp);
 990                 bap[indirs[i].in_off] = nb;
 991                 /*
 992                  * If required, write synchronously, otherwise use
 993                  * delayed write.
 994                  */
 995                 if (flags & IO_SYNC) {
 996                         bwrite(bp);
 997                 } else {
 998                         if (bp->b_bufsize == fs->fs_bsize)
 999                                 bp->b_flags |= B_CLUSTEROK;
1000                         bdwrite(bp);
1001                 }
1002                 curthread_pflags_restore(saved_inbdflush);
1003                 *bpp = nbp;
1004                 return (0);
1005         }
1006         brelse(bp);
1007         /*
1008          * If requested clear invalid portions of the buffer.  If we
1009          * have to do a read-before-write (typical if BA_CLRBUF is set),
1010          * try to do some read-ahead in the sequential case to reduce
1011          * the number of I/O transactions.
1012          */
1013         if (flags & BA_CLRBUF) {
1014                 int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
1015                 if (seqcount != 0 &&
1016                     (vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0 &&
1017                     !(vm_page_count_severe() || buf_dirty_count_severe())) {
1018                         error = cluster_read(vp, ip->i_size, lbn,
1019                             (int)fs->fs_bsize, NOCRED,
1020                             MAXBSIZE, seqcount, gbflags, &nbp);
1021                 } else {
1022                         error = bread_gb(vp, lbn, (int)fs->fs_bsize,
1023                             NOCRED, gbflags, &nbp);
1024                 }
1025                 if (error) {
1026                         brelse(nbp);
1027                         goto fail;
1028                 }
1029         } else {
1030                 nbp = getblk(vp, lbn, fs->fs_bsize, 0, 0, gbflags);
1031                 nbp->b_blkno = fsbtodb(fs, nb);
1032         }
1033         curthread_pflags_restore(saved_inbdflush);
1034         *bpp = nbp;
1035         return (0);
1036 fail:
1037         curthread_pflags_restore(saved_inbdflush);
1038         /*
1039          * If we have failed to allocate any blocks, simply return the error.
1040          * This is the usual case and avoids the need to fsync the file.
1041          */
1042         if (allocblk == allociblk && allocib == NULL && unwindidx == -1)
1043                 return (error);
1044         /*
1045          * If we have failed part way through block allocation, we
1046          * have to deallocate any indirect blocks that we have allocated.
1047          * We have to fsync the file before we start to get rid of all
1048          * of its dependencies so that we do not leave them dangling.
1049          * We have to sync it at the end so that the soft updates code
1050          * does not find any untracked changes. Although this is really
1051          * slow, running out of disk space is not expected to be a common
1052          * occurrence. The error return from fsync is ignored as we already
1053          * have an error to return to the user.
1054          *
1055          * XXX Still have to journal the free below
1056          */
1057         (void) ffs_syncvnode(vp, MNT_WAIT, 0);
1058         for (deallocated = 0, blkp = allociblk, lbns_remfree = lbns;
1059              blkp < allocblk; blkp++, lbns_remfree++) {
1060                 /*
1061                  * We shall not leave the freed blocks on the vnode
1062                  * buffer object lists.
1063                  */
1064                 bp = getblk(vp, *lbns_remfree, fs->fs_bsize, 0, 0, GB_NOCREAT);
1065                 if (bp != NULL) {
1066                         bp->b_flags |= (B_INVAL | B_RELBUF);
1067                         bp->b_flags &= ~B_ASYNC;
1068                         brelse(bp);
1069                 }
1070                 deallocated += fs->fs_bsize;
1071         }
1072         if (allocib != NULL) {
1073                 *allocib = 0;
1074         } else if (unwindidx >= 0) {
1075                 int r;
1076
1077                 r = bread(vp, indirs[unwindidx].in_lbn,
1078                     (int)fs->fs_bsize, NOCRED, &bp);
1079                 if (r) {
1080                         panic("Could not unwind indirect block, error %d", r);
1081                         brelse(bp);
1082                 } else {
1083                         bap = (ufs2_daddr_t *)bp->b_data;
1084                         bap[indirs[unwindidx].in_off] = 0;
1085                         if (flags & IO_SYNC) {
1086                                 bwrite(bp);
1087                         } else {
1088                                 if (bp->b_bufsize == fs->fs_bsize)
1089                                         bp->b_flags |= B_CLUSTEROK;
1090                                 bdwrite(bp);
1091                         }
1092                 }
1093         }
1094         if (deallocated) {
1095 #ifdef QUOTA
1096                 /*
1097                  * Restore user's disk quota because allocation failed.
1098                  */
1099                 (void) chkdq(ip, -btodb(deallocated), cred, FORCE);
1100 #endif
1101                 dp->di_blocks -= btodb(deallocated);
1102                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1103         }
1104         (void) ffs_syncvnode(vp, MNT_WAIT, 0);
1105         /*
1106          * After the buffers are invalidated and on-disk pointers are
1107          * cleared, free the blocks.
1108          */
1109         for (blkp = allociblk; blkp < allocblk; blkp++) {
1110                 ffs_blkfree(ump, fs, ip->i_devvp, *blkp, fs->fs_bsize,
1111                     ip->i_number, vp->v_type, NULL);
1112         }
1113         return (error);
1114 }