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