1 /* 2 * Copyright (c) 1989, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 30 * $FreeBSD: src/sys/ufs/ffs/ffs_vfsops.c,v 1.117.2.10 2002/06/23 22:34:52 iedowse Exp $ 31 */ 32 33 #include "opt_quota.h" 34 35 #include <sys/disk.h> 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/nlookup.h> 40 #include <sys/kernel.h> 41 #include <sys/vnode.h> 42 #include <sys/mount.h> 43 #include <sys/buf.h> 44 #include <sys/conf.h> 45 #include <sys/fcntl.h> 46 #include <sys/diskslice.h> 47 #include <sys/malloc.h> 48 49 #include "quota.h" 50 #include "ufsmount.h" 51 #include "inode.h" 52 #include "ufs_extern.h" 53 54 #include "fs.h" 55 #include "ffs_extern.h" 56 57 #include <vm/vm.h> 58 #include <vm/vm_page.h> 59 #include <vm/vm_zone.h> 60 61 #include <sys/buf2.h> 62 63 static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part"); 64 65 static int ffs_sbupdate (struct ufsmount *, int); 66 static int ffs_reload (struct mount *, struct ucred *); 67 static int ffs_oldfscompat (struct fs *); 68 static int ffs_mount (struct mount *, char *, caddr_t, struct ucred *); 69 static int ffs_init (struct vfsconf *); 70 71 static struct vfsops ufs_vfsops = { 72 .vfs_mount = ffs_mount, 73 .vfs_unmount = ffs_unmount, 74 .vfs_root = ufs_root, 75 .vfs_quotactl = ufs_quotactl, 76 .vfs_statfs = ffs_statfs, 77 .vfs_sync = ffs_sync, 78 .vfs_vget = ffs_vget, 79 .vfs_fhtovp = ffs_fhtovp, 80 .vfs_checkexp = ufs_check_export, 81 .vfs_vptofh = ffs_vptofh, 82 .vfs_init = ffs_init, 83 }; 84 85 VFS_SET(ufs_vfsops, ufs, 0); 86 MODULE_VERSION(ufs, 1); 87 88 extern struct vop_ops ffs_vnode_vops; 89 extern struct vop_ops ffs_spec_vops; 90 extern struct vop_ops ffs_fifo_vops; 91 92 /* 93 * ffs_mount 94 * 95 * Called when mounting local physical media 96 * 97 * PARAMETERS: 98 * mountroot 99 * mp mount point structure 100 * path NULL (flag for root mount!!!) 101 * data <unused> 102 * p process (user credentials check [statfs]) 103 * 104 * mount 105 * mp mount point structure 106 * path path to mount point 107 * data pointer to argument struct in user space 108 * p process (user credentials check) 109 * 110 * RETURNS: 0 Success 111 * !0 error number (errno.h) 112 * 113 * LOCK STATE: 114 * 115 * ENTRY 116 * mount point is locked 117 * EXIT 118 * mount point is locked 119 * 120 * NOTES: 121 * A NULL path can be used for a flag since the mount 122 * system call will fail with EFAULT in copyinstr in 123 * nlookup() if it is a genuine NULL from the user. 124 */ 125 static int 126 ffs_mount(struct mount *mp, /* mount struct pointer */ 127 char *path, /* path to mount point */ 128 caddr_t data, /* arguments to FS specific mount */ 129 struct ucred *cred) /* process requesting mount */ 130 { 131 size_t size; 132 int error; 133 struct vnode *devvp; 134 135 struct ufs_args args; 136 struct ufsmount *ump = NULL; 137 struct fs *fs; 138 int flags, ronly = 0; 139 mode_t accessmode; 140 struct nlookupdata nd; 141 struct vnode *rootvp; 142 143 devvp = NULL; 144 error = 0; 145 146 /* 147 * Use NULL path to flag a root mount 148 */ 149 if (path == NULL) { 150 /* 151 *** 152 * Mounting root filesystem 153 *** 154 */ 155 156 if ((error = bdevvp(rootdev, &rootvp))) { 157 kprintf("ffs_mountroot: can't find rootvp\n"); 158 return (error); 159 } 160 161 if( ( error = ffs_mountfs(rootvp, mp, M_FFSNODE)) != 0) { 162 /* fs specific cleanup (if any)*/ 163 goto error_1; 164 } 165 devvp = rootvp; 166 167 goto dostatfs; /* success*/ 168 169 } 170 171 /* 172 *** 173 * Mounting non-root filesystem or updating a filesystem 174 *** 175 */ 176 177 /* copy in user arguments*/ 178 error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)); 179 if (error) 180 goto error_1; /* can't get arguments*/ 181 182 /* 183 * If updating, check whether changing from read-only to 184 * read/write; if there is no device name, that's all we do. 185 */ 186 if (mp->mnt_flag & MNT_UPDATE) { 187 ump = VFSTOUFS(mp); 188 fs = ump->um_fs; 189 devvp = ump->um_devvp; 190 error = 0; 191 ronly = fs->fs_ronly; /* MNT_RELOAD might change this */ 192 if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 193 /* 194 * Flush any dirty data. 195 */ 196 VFS_SYNC(mp, MNT_WAIT); 197 /* 198 * Check for and optionally get rid of files open 199 * for writing. 200 */ 201 flags = WRITECLOSE; 202 if (mp->mnt_flag & MNT_FORCE) 203 flags |= FORCECLOSE; 204 if (mp->mnt_flag & MNT_SOFTDEP) { 205 error = softdep_flushfiles(mp, flags); 206 } else { 207 error = ffs_flushfiles(mp, flags); 208 } 209 ronly = 1; 210 } 211 if (!error && (mp->mnt_flag & MNT_RELOAD)) { 212 error = ffs_reload(mp, NULL); 213 } 214 if (error) { 215 goto error_1; 216 } 217 if (ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 218 /* 219 * If upgrade to read-write by non-root, then verify 220 * that user has necessary permissions on the device. 221 */ 222 if (cred->cr_uid != 0) { 223 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 224 if ((error = VOP_EACCESS(devvp, VREAD | VWRITE, 225 cred)) != 0) { 226 vn_unlock(devvp); 227 return (error); 228 } 229 vn_unlock(devvp); 230 } 231 232 fs->fs_flags &= ~FS_UNCLEAN; 233 if (fs->fs_clean == 0) { 234 fs->fs_flags |= FS_UNCLEAN; 235 if (mp->mnt_flag & MNT_FORCE) { 236 kprintf( 237 "WARNING: %s was not properly dismounted\n", 238 fs->fs_fsmnt); 239 } else { 240 kprintf( 241 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 242 fs->fs_fsmnt); 243 error = EPERM; 244 goto error_1; 245 } 246 } 247 248 /* check to see if we need to start softdep */ 249 if (fs->fs_flags & FS_DOSOFTDEP) { 250 error = softdep_mount(devvp, mp, fs); 251 if (error) 252 goto error_1; 253 } 254 ronly = 0; 255 } 256 /* 257 * Soft updates is incompatible with "async", 258 * so if we are doing softupdates stop the user 259 * from setting the async flag in an update. 260 * Softdep_mount() clears it in an initial mount 261 * or ro->rw remount. 262 */ 263 if (mp->mnt_flag & MNT_SOFTDEP) { 264 mp->mnt_flag &= ~MNT_ASYNC; 265 } 266 /* if not updating name...*/ 267 if (args.fspec == 0) { 268 /* 269 * Process export requests. Jumping to "success" 270 * will return the vfs_export() error code. 271 */ 272 error = vfs_export(mp, &ump->um_export, &args.export); 273 goto success; 274 } 275 } 276 277 /* 278 * Not an update, or updating the name: look up the name 279 * and verify that it refers to a sensible block device. 280 */ 281 devvp = NULL; 282 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); 283 if (error == 0) 284 error = nlookup(&nd); 285 if (error == 0) 286 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 287 nlookup_done(&nd); 288 if (error) 289 goto error_1; 290 291 if (!vn_isdisk(devvp, &error)) 292 goto error_2; 293 294 /* 295 * If mount by non-root, then verify that user has necessary 296 * permissions on the device. 297 */ 298 if (cred->cr_uid != 0) { 299 accessmode = VREAD; 300 if ((mp->mnt_flag & MNT_RDONLY) == 0) 301 accessmode |= VWRITE; 302 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 303 if ((error = VOP_EACCESS(devvp, accessmode, cred)) != 0) { 304 vput(devvp); 305 return (error); 306 } 307 vn_unlock(devvp); 308 } 309 310 if (mp->mnt_flag & MNT_UPDATE) { 311 /* 312 * UPDATE - make sure the resolved vnode represents the same 313 * device. Since devfs, devvp->v_rdev can be used directly as 314 * it is always associated as long as the vnode exists. 315 * 316 * Our current open/writecount state is associated with 317 * um_devvp, so continue using um_devvp and throw away devvp. 318 */ 319 if (devvp != ump->um_devvp) { 320 if (devvp->v_rdev == ump->um_devvp->v_rdev) { 321 vrele(devvp); 322 devvp = ump->um_devvp; 323 } else { 324 kprintf("cannot update mount, v_rdev does" 325 " not match (%p vs %p)\n", 326 devvp->v_rdev, ump->um_devvp->v_rdev); 327 error = EINVAL; /* needs translation */ 328 } 329 } else { 330 vrele(devvp); 331 } 332 /* 333 * Update device name only on success 334 */ 335 if (!error) { 336 /* Save "mounted from" info for mount point (NULL pad)*/ 337 copyinstr( args.fspec, 338 mp->mnt_stat.f_mntfromname, 339 MNAMELEN - 1, 340 &size); 341 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 342 } 343 } else { 344 /* 345 ******************** 346 * NEW MOUNT 347 ******************** 348 */ 349 350 /* Save "mounted from" info for mount point (NULL pad)*/ 351 copyinstr( args.fspec, /* device name*/ 352 mp->mnt_stat.f_mntfromname, /* save area*/ 353 MNAMELEN - 1, /* max size*/ 354 &size); /* real size*/ 355 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 356 357 /* Save "last mounted on" info for mount point (NULL pad)*/ 358 bzero(mp->mnt_stat.f_mntonname, 359 sizeof(mp->mnt_stat.f_mntonname)); 360 if (path) { 361 copyinstr(path, mp->mnt_stat.f_mntonname, 362 sizeof(mp->mnt_stat.f_mntonname) - 1, 363 &size); 364 } else { /* Root mount */ 365 mp->mnt_stat.f_mntonname[0] = '/'; 366 } 367 368 error = ffs_mountfs(devvp, mp, M_FFSNODE); 369 } 370 if (error) { 371 goto error_2; 372 } 373 374 dostatfs: 375 /* 376 * Initialize FS stat information in mount struct; uses 377 * mp->mnt_stat.f_mntfromname. 378 * 379 * This code is common to root and non-root mounts 380 */ 381 (void)VFS_STATFS(mp, &mp->mnt_stat, cred); 382 383 goto success; 384 385 386 error_2: /* error with devvp held*/ 387 388 /* release devvp before failing*/ 389 vrele(devvp); 390 391 error_1: /* no state to back out*/ 392 393 success: 394 if (!error && path && (mp->mnt_flag & MNT_UPDATE)) { 395 /* Update clean flag after changing read-onlyness. */ 396 fs = ump->um_fs; 397 if (ronly != fs->fs_ronly) { 398 fs->fs_ronly = ronly; 399 fs->fs_clean = ronly && 400 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0; 401 402 /* 403 * The device must be re-opened as appropriate or 404 * the device close at unmount time will panic. 405 */ 406 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 407 if (ronly) { 408 VOP_OPEN(devvp, FREAD, FSCRED, NULL); 409 VOP_CLOSE(devvp, FREAD|FWRITE); 410 } else { 411 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL); 412 VOP_CLOSE(devvp, FREAD); 413 } 414 vn_unlock(devvp); 415 ffs_sbupdate(ump, MNT_WAIT); 416 } 417 } 418 return (error); 419 } 420 421 /* 422 * Reload all incore data for a filesystem (used after running fsck on 423 * the root filesystem and finding things to fix). The filesystem must 424 * be mounted read-only. 425 * 426 * Things to do to update the mount: 427 * 1) invalidate all cached meta-data. 428 * 2) re-read superblock from disk. 429 * 3) re-read summary information from disk. 430 * 4) invalidate all inactive vnodes. 431 * 5) invalidate all cached file data. 432 * 6) re-read inode data for all active vnodes. 433 */ 434 435 static int ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data); 436 437 struct scaninfo { 438 int rescan; 439 struct fs *fs; 440 struct vnode *devvp; 441 int waitfor; 442 int allerror; 443 }; 444 445 static int 446 ffs_reload(struct mount *mp, struct ucred *cred) 447 { 448 struct vnode *devvp; 449 void *space; 450 struct buf *bp; 451 struct fs *fs, *newfs; 452 struct partinfo dpart; 453 int i, blks, size, error; 454 struct scaninfo scaninfo; 455 int32_t *lp; 456 457 if ((mp->mnt_flag & MNT_RDONLY) == 0) 458 return (EINVAL); 459 /* 460 * Step 1: invalidate all cached meta-data. 461 */ 462 devvp = VFSTOUFS(mp)->um_devvp; 463 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 464 error = vinvalbuf(devvp, 0, 0, 0); 465 vn_unlock(devvp); 466 if (error) 467 panic("ffs_reload: dirty1"); 468 469 /* 470 * The backing device must be VMIO-capable because we use getblk(). 471 * NOTE: the MFS driver now returns a VMIO-enabled descriptor. 472 */ 473 if (devvp->v_object == NULL) 474 panic("ffs_reload: devvp has no VM object!"); 475 476 /* 477 * Step 2: re-read superblock from disk. 478 */ 479 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, 480 cred, NULL) != 0) { 481 size = DEV_BSIZE; 482 } else { 483 size = dpart.media_blksize; 484 } 485 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0) { 486 brelse(bp); 487 return (error); 488 } 489 newfs = (struct fs *)bp->b_data; 490 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || 491 newfs->fs_bsize < sizeof(struct fs)) { 492 brelse(bp); 493 return (EIO); /* XXX needs translation */ 494 } 495 fs = VFSTOUFS(mp)->um_fs; 496 /* 497 * Copy pointer fields back into superblock before copying in XXX 498 * new superblock. These should really be in the ufsmount. XXX 499 * Note that important parameters (eg fs_ncg) are unchanged. 500 */ 501 newfs->fs_csp = fs->fs_csp; 502 newfs->fs_maxcluster = fs->fs_maxcluster; 503 newfs->fs_contigdirs = fs->fs_contigdirs; 504 /* The filesystem is still read-only. */ 505 newfs->fs_ronly = 1; 506 bcopy(newfs, fs, (uint)fs->fs_sbsize); 507 if (fs->fs_sbsize < SBSIZE) 508 bp->b_flags |= B_INVAL; 509 brelse(bp); 510 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 511 ffs_oldfscompat(fs); 512 /* An old fsck may have zeroed these fields, so recheck them. */ 513 if (fs->fs_avgfilesize <= 0) /* XXX */ 514 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 515 if (fs->fs_avgfpdir <= 0) /* XXX */ 516 fs->fs_avgfpdir = AFPDIR; /* XXX */ 517 518 /* 519 * Step 3: re-read summary information from disk. 520 */ 521 blks = howmany(fs->fs_cssize, fs->fs_fsize); 522 space = fs->fs_csp; 523 for (i = 0; i < blks; i += fs->fs_frag) { 524 size = fs->fs_bsize; 525 if (i + fs->fs_frag > blks) 526 size = (blks - i) * fs->fs_fsize; 527 error = bread(devvp, fsbtodoff(fs, fs->fs_csaddr + i), size, &bp); 528 if (error) { 529 brelse(bp); 530 return (error); 531 } 532 bcopy(bp->b_data, space, (uint)size); 533 space = (char *)space + size; 534 brelse(bp); 535 } 536 /* 537 * We no longer know anything about clusters per cylinder group. 538 */ 539 if (fs->fs_contigsumsize > 0) { 540 lp = fs->fs_maxcluster; 541 for (i = 0; i < fs->fs_ncg; i++) 542 *lp++ = fs->fs_contigsumsize; 543 } 544 545 scaninfo.rescan = 0; 546 scaninfo.fs = fs; 547 scaninfo.devvp = devvp; 548 while (error == 0 && scaninfo.rescan) { 549 scaninfo.rescan = 0; 550 error = vmntvnodescan(mp, VMSC_GETVX, 551 NULL, ffs_reload_scan2, &scaninfo); 552 } 553 return(error); 554 } 555 556 static int 557 ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data) 558 { 559 struct scaninfo *info = data; 560 struct inode *ip; 561 struct buf *bp; 562 int error; 563 564 /* 565 * Try to recycle 566 */ 567 if (vrecycle(vp)) 568 return(0); 569 570 if (vinvalbuf(vp, 0, 0, 0)) 571 panic("ffs_reload: dirty2"); 572 /* 573 * Step 6: re-read inode data for all active vnodes. 574 */ 575 ip = VTOI(vp); 576 error = bread(info->devvp, 577 fsbtodoff(info->fs, ino_to_fsba(info->fs, ip->i_number)), 578 (int)info->fs->fs_bsize, &bp); 579 if (error) { 580 brelse(bp); 581 return (error); 582 } 583 ip->i_din = *((struct ufs1_dinode *)bp->b_data + 584 ino_to_fsbo(info->fs, ip->i_number)); 585 ip->i_effnlink = ip->i_nlink; 586 brelse(bp); 587 return(0); 588 } 589 590 /* 591 * Common code for mount and mountroot 592 */ 593 int 594 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct malloc_type *mtype) 595 { 596 struct ufsmount *ump; 597 struct buf *bp; 598 struct fs *fs; 599 cdev_t dev; 600 struct partinfo dpart; 601 void *space; 602 int error, i, blks, size, ronly; 603 int32_t *lp; 604 uint64_t maxfilesize; /* XXX */ 605 606 /* 607 * Disallow multiple mounts of the same device. 608 * Disallow mounting of a device that is currently in use 609 * Flush out any old buffers remaining from a previous use. 610 */ 611 error = vfs_mountedon(devvp); 612 if (error) 613 return (error); 614 if (vcount(devvp) > 0) 615 return (EBUSY); 616 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 617 error = vinvalbuf(devvp, V_SAVE, 0, 0); 618 vn_unlock(devvp); 619 if (error) 620 return (error); 621 622 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 623 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 624 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL); 625 vn_unlock(devvp); 626 if (error) 627 return (error); 628 dev = devvp->v_rdev; 629 if (dev->si_iosize_max != 0) 630 mp->mnt_iosize_max = dev->si_iosize_max; 631 if (mp->mnt_iosize_max > MAXPHYS) 632 mp->mnt_iosize_max = MAXPHYS; 633 634 /* 635 * Filesystem supports native FSMIDs 636 */ 637 mp->mnt_kern_flag |= MNTK_FSMID; 638 639 /* 640 * The backing device must be VMIO-capable because we use getblk(). 641 * NOTE: the MFS driver now returns a VMIO-enabled descriptor. 642 * The VOP_OPEN() call above should have associated a VM object 643 * with devvp. 644 */ 645 if (devvp->v_object == NULL) 646 panic("ffs_reload: devvp has no VM object!"); 647 648 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, 649 proc0.p_ucred, NULL) != 0) { 650 size = DEV_BSIZE; 651 } else { 652 size = dpart.media_blksize; 653 } 654 655 bp = NULL; 656 ump = NULL; 657 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0) 658 goto out; 659 fs = (struct fs *)bp->b_data; 660 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 661 fs->fs_bsize < sizeof(struct fs)) { 662 error = EINVAL; /* XXX needs translation */ 663 goto out; 664 } 665 fs->fs_fmod = 0; 666 fs->fs_flags &= ~FS_UNCLEAN; 667 if (fs->fs_clean == 0) { 668 fs->fs_flags |= FS_UNCLEAN; 669 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 670 kprintf( 671 "WARNING: %s was not properly dismounted\n", 672 fs->fs_fsmnt); 673 } else { 674 kprintf( 675 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 676 fs->fs_fsmnt); 677 error = EPERM; 678 goto out; 679 } 680 } 681 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ 682 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { 683 error = EROFS; /* needs translation */ 684 goto out; 685 } 686 ump = kmalloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); 687 ump->um_malloctype = mtype; 688 ump->um_i_effnlink_valid = 1; 689 ump->um_fs = kmalloc((u_long)fs->fs_sbsize, M_UFSMNT, 690 M_WAITOK); 691 bcopy(bp->b_data, ump->um_fs, (uint)fs->fs_sbsize); 692 if (fs->fs_sbsize < SBSIZE) 693 bp->b_flags |= B_INVAL; 694 brelse(bp); 695 bp = NULL; 696 fs = ump->um_fs; 697 fs->fs_ronly = ronly; 698 size = fs->fs_cssize; 699 blks = howmany(size, fs->fs_fsize); 700 if (fs->fs_contigsumsize > 0) 701 size += fs->fs_ncg * sizeof(int32_t); 702 size += fs->fs_ncg * sizeof(uint8_t); 703 space = kmalloc((u_long)size, M_UFSMNT, M_WAITOK); 704 fs->fs_csp = space; 705 for (i = 0; i < blks; i += fs->fs_frag) { 706 size = fs->fs_bsize; 707 if (i + fs->fs_frag > blks) 708 size = (blks - i) * fs->fs_fsize; 709 if ((error = bread(devvp, fsbtodoff(fs, fs->fs_csaddr + i), 710 size, &bp)) != 0) { 711 kfree(fs->fs_csp, M_UFSMNT); 712 goto out; 713 } 714 bcopy(bp->b_data, space, (uint)size); 715 space = (char *)space + size; 716 brelse(bp); 717 bp = NULL; 718 } 719 if (fs->fs_contigsumsize > 0) { 720 fs->fs_maxcluster = lp = space; 721 for (i = 0; i < fs->fs_ncg; i++) 722 *lp++ = fs->fs_contigsumsize; 723 space = lp; 724 } 725 size = fs->fs_ncg * sizeof(uint8_t); 726 fs->fs_contigdirs = (uint8_t *)space; 727 bzero(fs->fs_contigdirs, size); 728 /* Compatibility for old filesystems XXX */ 729 if (fs->fs_avgfilesize <= 0) /* XXX */ 730 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 731 if (fs->fs_avgfpdir <= 0) /* XXX */ 732 fs->fs_avgfpdir = AFPDIR; /* XXX */ 733 mp->mnt_data = (qaddr_t)ump; 734 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 735 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 736 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 737 vfs_getvfs(&mp->mnt_stat.f_fsid)) 738 vfs_getnewfsid(mp); 739 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 740 mp->mnt_flag |= MNT_LOCAL; 741 ump->um_mountp = mp; 742 ump->um_dev = dev; 743 ump->um_devvp = devvp; 744 ump->um_nindir = fs->fs_nindir; 745 ump->um_bptrtodb = fs->fs_fsbtodb; 746 ump->um_seqinc = fs->fs_frag; 747 for (i = 0; i < MAXQUOTAS; i++) 748 ump->um_quotas[i] = NULLVP; 749 dev->si_mountpoint = mp; 750 ffs_oldfscompat(fs); 751 752 /* restore "last mounted on" here */ 753 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); 754 ksnprintf(fs->fs_fsmnt, sizeof(fs->fs_fsmnt), 755 "%s", mp->mnt_stat.f_mntonname); 756 757 if( mp->mnt_flag & MNT_ROOTFS) { 758 /* 759 * Root mount; update timestamp in mount structure. 760 * this will be used by the common root mount code 761 * to update the system clock. 762 */ 763 mp->mnt_time = fs->fs_time; 764 } 765 766 ufs_ihashinit(ump); 767 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ 768 maxfilesize = (uint64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ 769 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */ 770 if (maxfilesize > (uint64_t)0x80000000u * PAGE_SIZE - 1) 771 maxfilesize = (uint64_t)0x80000000u * PAGE_SIZE - 1; 772 if (fs->fs_maxfilesize > maxfilesize) /* XXX */ 773 fs->fs_maxfilesize = maxfilesize; /* XXX */ 774 if (ronly == 0) { 775 if ((fs->fs_flags & FS_DOSOFTDEP) && 776 (error = softdep_mount(devvp, mp, fs)) != 0) { 777 kfree(fs->fs_csp, M_UFSMNT); 778 goto out; 779 } 780 fs->fs_fmod = 1; 781 fs->fs_clean = 0; 782 (void) ffs_sbupdate(ump, MNT_WAIT); 783 } 784 vfs_add_vnodeops(mp, &ffs_vnode_vops, &mp->mnt_vn_norm_ops); 785 vfs_add_vnodeops(mp, &ffs_spec_vops, &mp->mnt_vn_spec_ops); 786 vfs_add_vnodeops(mp, &ffs_fifo_vops, &mp->mnt_vn_fifo_ops); 787 788 return (0); 789 out: 790 dev->si_mountpoint = NULL; 791 if (bp) 792 brelse(bp); 793 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 794 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE); 795 vn_unlock(devvp); 796 if (ump) { 797 ufs_ihashuninit(ump); 798 kfree(ump->um_fs, M_UFSMNT); 799 kfree(ump, M_UFSMNT); 800 mp->mnt_data = (qaddr_t)0; 801 } 802 return (error); 803 } 804 805 /* 806 * Sanity checks for old filesystems. 807 * 808 * XXX - goes away some day. 809 */ 810 static int 811 ffs_oldfscompat(struct fs *fs) 812 { 813 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ 814 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ 815 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 816 fs->fs_nrpos = 8; /* XXX */ 817 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 818 #if 0 819 int i; /* XXX */ 820 uint64_t sizepb = fs->fs_bsize; /* XXX */ 821 /* XXX */ 822 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ 823 for (i = 0; i < NIADDR; i++) { /* XXX */ 824 sizepb *= NINDIR(fs); /* XXX */ 825 fs->fs_maxfilesize += sizepb; /* XXX */ 826 } /* XXX */ 827 #endif 828 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 829 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ 830 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ 831 } /* XXX */ 832 return (0); 833 } 834 835 /* 836 * unmount system call 837 */ 838 int 839 ffs_unmount(struct mount *mp, int mntflags) 840 { 841 struct ufsmount *ump; 842 struct fs *fs; 843 int error, flags; 844 845 flags = 0; 846 if (mntflags & MNT_FORCE) { 847 flags |= FORCECLOSE; 848 } 849 if (mp->mnt_flag & MNT_SOFTDEP) { 850 if ((error = softdep_flushfiles(mp, flags)) != 0) 851 return (error); 852 } else { 853 if ((error = ffs_flushfiles(mp, flags)) != 0) 854 return (error); 855 } 856 ump = VFSTOUFS(mp); 857 fs = ump->um_fs; 858 if (fs->fs_ronly == 0) { 859 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1; 860 error = ffs_sbupdate(ump, MNT_WAIT); 861 if (error) { 862 fs->fs_clean = 0; 863 return (error); 864 } 865 } 866 ump->um_devvp->v_rdev->si_mountpoint = NULL; 867 868 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 869 vinvalbuf(ump->um_devvp, V_SAVE, 0, 0); 870 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE); 871 vn_unlock(ump->um_devvp); 872 873 vrele(ump->um_devvp); 874 875 ufs_ihashuninit(ump); 876 kfree(fs->fs_csp, M_UFSMNT); 877 kfree(fs, M_UFSMNT); 878 kfree(ump, M_UFSMNT); 879 mp->mnt_data = (qaddr_t)0; 880 mp->mnt_flag &= ~MNT_LOCAL; 881 return (error); 882 } 883 884 /* 885 * Flush out all the files in a filesystem. 886 */ 887 int 888 ffs_flushfiles(struct mount *mp, int flags) 889 { 890 struct ufsmount *ump; 891 int error; 892 893 ump = VFSTOUFS(mp); 894 #ifdef QUOTA 895 if (mp->mnt_flag & MNT_QUOTA) { 896 int i; 897 error = vflush(mp, 0, SKIPSYSTEM|flags); 898 if (error) 899 return (error); 900 /* Find out how many quota files we have open. */ 901 for (i = 0; i < MAXQUOTAS; i++) { 902 if (ump->um_quotas[i] == NULLVP) 903 continue; 904 ufs_quotaoff(mp, i); 905 } 906 /* 907 * Here we fall through to vflush again to ensure 908 * that we have gotten rid of all the system vnodes. 909 */ 910 } 911 #endif 912 /* 913 * Flush all the files. 914 */ 915 if ((error = vflush(mp, 0, flags)) != 0) 916 return (error); 917 /* 918 * Flush filesystem metadata. 919 */ 920 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 921 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, 0); 922 vn_unlock(ump->um_devvp); 923 return (error); 924 } 925 926 /* 927 * Get filesystem statistics. 928 */ 929 int 930 ffs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 931 { 932 struct ufsmount *ump; 933 struct fs *fs; 934 935 ump = VFSTOUFS(mp); 936 fs = ump->um_fs; 937 if (fs->fs_magic != FS_MAGIC) 938 panic("ffs_statfs"); 939 sbp->f_bsize = fs->fs_fsize; 940 sbp->f_iosize = fs->fs_bsize; 941 sbp->f_blocks = fs->fs_dsize; 942 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 943 fs->fs_cstotal.cs_nffree; 944 sbp->f_bavail = freespace(fs, fs->fs_minfree); 945 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 946 sbp->f_ffree = fs->fs_cstotal.cs_nifree; 947 if (sbp != &mp->mnt_stat) { 948 sbp->f_type = mp->mnt_vfc->vfc_typenum; 949 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 950 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 951 } 952 return (0); 953 } 954 955 /* 956 * Go through the disk queues to initiate sandbagged IO; 957 * go through the inodes to write those that have been modified; 958 * initiate the writing of the super block if it has been modified. 959 * 960 * Note: we are always called with the filesystem marked `MPBUSY'. 961 */ 962 963 964 static int ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 965 static int ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data); 966 967 int 968 ffs_sync(struct mount *mp, int waitfor) 969 { 970 struct ufsmount *ump = VFSTOUFS(mp); 971 struct fs *fs; 972 int error; 973 struct scaninfo scaninfo; 974 975 fs = ump->um_fs; 976 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 977 kprintf("fs = %s\n", fs->fs_fsmnt); 978 panic("ffs_sync: rofs mod"); 979 } 980 981 /* 982 * Write back each (modified) inode. 983 */ 984 scaninfo.allerror = 0; 985 scaninfo.rescan = 1; 986 scaninfo.waitfor = waitfor; 987 while (scaninfo.rescan) { 988 scaninfo.rescan = 0; 989 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, 990 ffs_sync_scan1, ffs_sync_scan2, &scaninfo); 991 } 992 993 /* 994 * Force stale filesystem control information to be flushed. 995 */ 996 if ((waitfor & MNT_LAZY) == 0) { 997 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP) 998 waitfor = MNT_NOWAIT; 999 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1000 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, 0)) != 0) 1001 scaninfo.allerror = error; 1002 vn_unlock(ump->um_devvp); 1003 } 1004 #ifdef QUOTA 1005 ufs_qsync(mp); 1006 #endif 1007 /* 1008 * Write back modified superblock. 1009 */ 1010 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1011 scaninfo.allerror = error; 1012 return (scaninfo.allerror); 1013 } 1014 1015 static int 1016 ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 1017 { 1018 struct inode *ip; 1019 1020 /* 1021 * Depend on the mount list's vnode lock to keep things stable 1022 * enough for a quick test. Since there might be hundreds of 1023 * thousands of vnodes, we cannot afford even a subroutine 1024 * call unless there's a good chance that we have work to do. 1025 */ 1026 ip = VTOI(vp); 1027 /* Restart out whole search if this guy is locked 1028 * or is being reclaimed. 1029 */ 1030 if (vp->v_type == VNON || (ip == NULL) || ((ip->i_flag & 1031 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1032 RB_EMPTY(&vp->v_rbdirty_tree))) { 1033 return(-1); 1034 } 1035 return(0); 1036 } 1037 1038 static int 1039 ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data) 1040 { 1041 struct scaninfo *info = data; 1042 struct inode *ip; 1043 int error; 1044 1045 /* 1046 * We have to recheck after having obtained the vnode interlock. 1047 */ 1048 ip = VTOI(vp); 1049 if (vp->v_type == VNON || vp->v_type == VBAD || 1050 ((ip->i_flag & 1051 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1052 RB_EMPTY(&vp->v_rbdirty_tree))) { 1053 return(0); 1054 } 1055 if (vp->v_type != VCHR) { 1056 if ((error = VOP_FSYNC(vp, info->waitfor, 0)) != 0) 1057 info->allerror = error; 1058 } else { 1059 /* 1060 * We must reference the vp to prevent it from 1061 * getting ripped out from under ffs_update, since 1062 * we are not holding a vnode lock. 1063 */ 1064 /* ffs_update(vp, waitfor == MNT_WAIT); */ 1065 ffs_update(vp, 0); 1066 } 1067 return(0); 1068 } 1069 1070 /* 1071 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1072 * in from disk. If it is in core, wait for the lock bit to clear, then 1073 * return the inode locked. Detection and handling of mount points must be 1074 * done by the calling routine. 1075 */ 1076 1077 int 1078 ffs_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 1079 { 1080 struct fs *fs; 1081 struct inode *ip; 1082 struct ufsmount *ump; 1083 struct buf *bp; 1084 struct vnode *vp; 1085 cdev_t dev; 1086 int error; 1087 1088 ump = VFSTOUFS(mp); 1089 dev = ump->um_dev; 1090 1091 retry: 1092 if ((*vpp = ufs_ihashget(ump, dev, ino)) != NULL) { 1093 return (0); 1094 } 1095 1096 /* 1097 * If this MALLOC() is performed after the getnewvnode() 1098 * it might block, leaving a vnode with a NULL v_data to be 1099 * found by ffs_sync() if a sync happens to fire right then, 1100 * which will cause a panic because ffs_sync() blindly 1101 * dereferences vp->v_data (as well it should). 1102 * 1103 * XXX this may no longer be true since getnewvnode returns a 1104 * VX locked vnode now. 1105 */ 1106 ip = kmalloc(sizeof(struct inode), ump->um_malloctype, 1107 M_WAITOK | M_ZERO); 1108 1109 /* Allocate a new vnode/inode. */ 1110 error = getnewvnode(VT_UFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE); 1111 if (error) { 1112 *vpp = NULL; 1113 kfree(ip, ump->um_malloctype); 1114 return (error); 1115 } 1116 ip->i_vnode = vp; 1117 ip->i_fs = fs = ump->um_fs; 1118 ip->i_dev = dev; 1119 ip->i_number = ino; 1120 #ifdef QUOTA 1121 { 1122 int i; 1123 for (i = 0; i < MAXQUOTAS; i++) 1124 ip->i_dquot[i] = NODQUOT; 1125 } 1126 #endif 1127 1128 /* 1129 * Insert it into the inode hash table. 1130 */ 1131 if (ufs_ihashins(ump, ip) != 0) { 1132 kprintf("debug: ufs ihashins collision, retrying inode %ld\n", 1133 (long) ip->i_number); 1134 *vpp = NULL; 1135 vp->v_type = VBAD; 1136 vx_put(vp); 1137 kfree(ip, ump->um_malloctype); 1138 goto retry; 1139 } 1140 vp->v_data = ip; 1141 1142 /* Read in the disk contents for the inode, copy into the inode. */ 1143 error = bread(ump->um_devvp, fsbtodoff(fs, ino_to_fsba(fs, ino)), 1144 (int)fs->fs_bsize, &bp); 1145 if (error) { 1146 /* 1147 * The inode does not contain anything useful, so it would 1148 * be misleading to leave it on its hash chain. With mode 1149 * still zero, it will be unlinked and returned to the free 1150 * list by vput(). 1151 */ 1152 vp->v_type = VBAD; 1153 brelse(bp); 1154 vx_put(vp); 1155 *vpp = NULL; 1156 return (error); 1157 } 1158 ip->i_din = *((struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 1159 if (DOINGSOFTDEP(vp)) 1160 softdep_load_inodeblock(ip); 1161 else 1162 ip->i_effnlink = ip->i_nlink; 1163 bqrelse(bp); 1164 1165 /* 1166 * Initialize the vnode from the inode, check for aliases. 1167 * Note that the underlying vnode may have changed. 1168 */ 1169 error = ufs_vinit(mp, &vp); 1170 if (error) { 1171 vp->v_type = VBAD; 1172 vx_put(vp); 1173 *vpp = NULL; 1174 return (error); 1175 } 1176 /* 1177 * Finish inode initialization now that aliasing has been resolved. 1178 */ 1179 ip->i_devvp = ump->um_devvp; 1180 vref(ip->i_devvp); 1181 /* 1182 * Set up a generation number for this inode if it does not 1183 * already have one. This should only happen on old filesystems. 1184 */ 1185 if (ip->i_gen == 0) { 1186 ip->i_gen = krandom() / 2 + 1; 1187 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1188 ip->i_flag |= IN_MODIFIED; 1189 } 1190 /* 1191 * Ensure that uid and gid are correct. This is a temporary 1192 * fix until fsck has been changed to do the update. 1193 */ 1194 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1195 ip->i_uid = ip->i_din.di_ouid; /* XXX */ 1196 ip->i_gid = ip->i_din.di_ogid; /* XXX */ 1197 } /* XXX */ 1198 1199 /* 1200 * return a VX locked and refd vnode (VX == same as normal vget() 1201 * vnode so we are ok) 1202 */ 1203 *vpp = vp; 1204 return (0); 1205 } 1206 1207 /* 1208 * File handle to vnode 1209 * 1210 * Have to be really careful about stale file handles: 1211 * - check that the inode number is valid 1212 * - call ffs_vget() to get the locked inode 1213 * - check for an unallocated inode (i_mode == 0) 1214 * - check that the given client host has export rights and return 1215 * those rights via. exflagsp and credanonp 1216 */ 1217 int 1218 ffs_fhtovp(struct mount *mp, struct vnode *rootvp, 1219 struct fid *fhp, struct vnode **vpp) 1220 { 1221 struct ufid *ufhp; 1222 struct fs *fs; 1223 1224 ufhp = (struct ufid *)fhp; 1225 fs = VFSTOUFS(mp)->um_fs; 1226 if (ufhp->ufid_ino < ROOTINO || 1227 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1228 return (ESTALE); 1229 return (ufs_fhtovp(mp, rootvp, ufhp, vpp)); 1230 } 1231 1232 /* 1233 * Vnode pointer to File handle 1234 */ 1235 /* ARGSUSED */ 1236 int 1237 ffs_vptofh(struct vnode *vp, struct fid *fhp) 1238 { 1239 struct inode *ip; 1240 struct ufid *ufhp; 1241 1242 ip = VTOI(vp); 1243 ufhp = (struct ufid *)fhp; 1244 ufhp->ufid_len = sizeof(struct ufid); 1245 ufhp->ufid_ino = ip->i_number; 1246 ufhp->ufid_gen = ip->i_gen; 1247 return (0); 1248 } 1249 1250 /* 1251 * Initialize the filesystem; just use ufs_init. 1252 */ 1253 static int 1254 ffs_init(struct vfsconf *vfsp) 1255 { 1256 softdep_initialize(); 1257 kmalloc_raise_limit(M_FFSNODE, 0); 1258 return (ufs_init(vfsp)); 1259 } 1260 1261 /* 1262 * Write a superblock and associated information back to disk. 1263 */ 1264 static int 1265 ffs_sbupdate(struct ufsmount *mp, int waitfor) 1266 { 1267 struct fs *dfs, *fs = mp->um_fs; 1268 struct buf *bp; 1269 int blks; 1270 void *space; 1271 int i, size, error, allerror = 0; 1272 1273 /* 1274 * First write back the summary information. 1275 * 1276 * NOTE: the getblk is relative to the device vnode so bio1 1277 * contains the device block number. 1278 */ 1279 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1280 space = fs->fs_csp; 1281 for (i = 0; i < blks; i += fs->fs_frag) { 1282 size = fs->fs_bsize; 1283 if (i + fs->fs_frag > blks) 1284 size = (blks - i) * fs->fs_fsize; 1285 bp = getblk(mp->um_devvp, fsbtodoff(fs, fs->fs_csaddr + i), 1286 size, 0, 0); 1287 bcopy(space, bp->b_data, (uint)size); 1288 space = (char *)space + size; 1289 if (waitfor != MNT_WAIT) 1290 bawrite(bp); 1291 else if ((error = bwrite(bp)) != 0) 1292 allerror = error; 1293 } 1294 /* 1295 * Now write back the superblock itself. If any errors occurred 1296 * up to this point, then fail so that the superblock avoids 1297 * being written out as clean. 1298 */ 1299 if (allerror) 1300 return (allerror); 1301 bp = getblk(mp->um_devvp, SBOFF, (int)fs->fs_sbsize, 0, 0); 1302 fs->fs_fmod = 0; 1303 fs->fs_time = time_second; 1304 bcopy((caddr_t)fs, bp->b_data, (uint)fs->fs_sbsize); 1305 /* Restore compatibility to old filesystems. XXX */ 1306 dfs = (struct fs *)bp->b_data; /* XXX */ 1307 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 1308 dfs->fs_nrpos = -1; /* XXX */ 1309 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1310 int32_t *lp, tmp; /* XXX */ 1311 /* XXX */ 1312 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ 1313 tmp = lp[4]; /* XXX */ 1314 for (i = 4; i > 0; i--) /* XXX */ 1315 lp[i] = lp[i-1]; /* XXX */ 1316 lp[0] = tmp; /* XXX */ 1317 } /* XXX */ 1318 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ 1319 if (waitfor != MNT_WAIT) 1320 bawrite(bp); 1321 else if ((error = bwrite(bp)) != 0) 1322 allerror = error; 1323 return (allerror); 1324 } 1325