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