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 * $Id: ffs_vfsops.c,v 1.98 1999/05/08 06:40:22 phk Exp $ 35 */ 36 37 #include "opt_quota.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/buf.h> 47 #include <sys/conf.h> 48 #include <sys/fcntl.h> 49 #include <sys/disklabel.h> 50 #include <sys/malloc.h> 51 52 #include <miscfs/specfs/specdev.h> 53 54 #include <ufs/ufs/quota.h> 55 #include <ufs/ufs/ufsmount.h> 56 #include <ufs/ufs/inode.h> 57 #include <ufs/ufs/ufs_extern.h> 58 59 #include <ufs/ffs/fs.h> 60 #include <ufs/ffs/ffs_extern.h> 61 62 #include <vm/vm.h> 63 #include <vm/vm_prot.h> 64 #include <vm/vm_page.h> 65 66 static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part"); 67 68 static int ffs_sbupdate __P((struct ufsmount *, int)); 69 static int ffs_reload __P((struct mount *,struct ucred *,struct proc *)); 70 static int ffs_oldfscompat __P((struct fs *)); 71 static int ffs_mount __P((struct mount *, char *, caddr_t, 72 struct nameidata *, struct proc *)); 73 static int ffs_init __P((struct vfsconf *)); 74 75 static struct vfsops ufs_vfsops = { 76 ffs_mount, 77 ufs_start, 78 ffs_unmount, 79 ufs_root, 80 ufs_quotactl, 81 ffs_statfs, 82 ffs_sync, 83 ffs_vget, 84 ffs_fhtovp, 85 ffs_vptofh, 86 ffs_init, 87 }; 88 89 VFS_SET(ufs_vfsops, ufs, 0); 90 91 /* 92 * ffs_mount 93 * 94 * Called when mounting local physical media 95 * 96 * PARAMETERS: 97 * mountroot 98 * mp mount point structure 99 * path NULL (flag for root mount!!!) 100 * data <unused> 101 * ndp <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 * ndp mount point namei() return (used for 109 * credentials on reload), reused to look 110 * up block device. 111 * p process (user credentials check) 112 * 113 * RETURNS: 0 Success 114 * !0 error number (errno.h) 115 * 116 * LOCK STATE: 117 * 118 * ENTRY 119 * mount point is locked 120 * EXIT 121 * mount point is locked 122 * 123 * NOTES: 124 * A NULL path can be used for a flag since the mount 125 * system call will fail with EFAULT in copyinstr in 126 * namei() if it is a genuine NULL from the user. 127 */ 128 static int 129 ffs_mount( mp, path, data, ndp, p) 130 struct mount *mp; /* mount struct pointer*/ 131 char *path; /* path to mount point*/ 132 caddr_t data; /* arguments to FS specific mount*/ 133 struct nameidata *ndp; /* mount point credentials*/ 134 struct proc *p; /* process requesting mount*/ 135 { 136 size_t size; 137 int err = 0; 138 struct vnode *devvp; 139 140 struct ufs_args args; 141 struct ufsmount *ump = 0; 142 register struct fs *fs; 143 int error, flags, ronly = 0; 144 mode_t accessmode; 145 146 /* 147 * Use NULL path to flag a root mount 148 */ 149 if( path == NULL) { 150 /* 151 *** 152 * Mounting root file system 153 *** 154 */ 155 156 if ((err = bdevvp(rootdev, &rootvp))) { 157 printf("ffs_mountroot: can't find rootvp"); 158 return (err); 159 } 160 161 if (bdevsw(rootdev)->d_flags & D_NOCLUSTERR) 162 mp->mnt_flag |= MNT_NOCLUSTERR; 163 if (bdevsw(rootdev)->d_flags & D_NOCLUSTERW) 164 mp->mnt_flag |= MNT_NOCLUSTERW; 165 if( ( err = ffs_mountfs(rootvp, mp, p, M_FFSNODE)) != 0) { 166 /* fs specific cleanup (if any)*/ 167 goto error_1; 168 } 169 170 goto dostatfs; /* success*/ 171 172 } 173 174 /* 175 *** 176 * Mounting non-root file system or updating a file system 177 *** 178 */ 179 180 /* copy in user arguments*/ 181 err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)); 182 if (err) 183 goto error_1; /* can't get arguments*/ 184 185 /* 186 * If updating, check whether changing from read-only to 187 * read/write; if there is no device name, that's all we do. 188 * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags, 189 * if block device requests. 190 */ 191 if (mp->mnt_flag & MNT_UPDATE) { 192 ump = VFSTOUFS(mp); 193 fs = ump->um_fs; 194 devvp = ump->um_devvp; 195 err = 0; 196 ronly = fs->fs_ronly; /* MNT_RELOAD might change this */ 197 if (bdevsw(ump->um_dev)->d_flags & D_NOCLUSTERR) 198 mp->mnt_flag |= MNT_NOCLUSTERR; 199 if (bdevsw(ump->um_dev)->d_flags & D_NOCLUSTERW) 200 mp->mnt_flag |= MNT_NOCLUSTERW; 201 if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 202 flags = WRITECLOSE; 203 if (mp->mnt_flag & MNT_FORCE) 204 flags |= FORCECLOSE; 205 if (mp->mnt_flag & MNT_SOFTDEP) { 206 err = softdep_flushfiles(mp, flags, p); 207 } else { 208 err = ffs_flushfiles(mp, flags, p); 209 } 210 ronly = 1; 211 } 212 if (!err && (mp->mnt_flag & MNT_RELOAD)) 213 err = ffs_reload(mp, ndp->ni_cnd.cn_cred, p); 214 if (err) { 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 (p->p_ucred->cr_uid != 0) { 223 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 224 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 225 p->p_ucred, p)) != 0) { 226 VOP_UNLOCK(devvp, 0, p); 227 return (error); 228 } 229 VOP_UNLOCK(devvp, 0, p); 230 } 231 232 if (fs->fs_clean == 0) { 233 if (mp->mnt_flag & MNT_FORCE) { 234 printf( 235 "WARNING: %s was not properly dismounted\n", 236 fs->fs_fsmnt); 237 } else { 238 printf( 239 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 240 fs->fs_fsmnt); 241 err = EPERM; 242 goto error_1; 243 } 244 } 245 246 /* check to see if we need to start softdep */ 247 if (fs->fs_flags & FS_DOSOFTDEP) { 248 err = softdep_mount(devvp, mp, fs, p->p_ucred); 249 if (err) 250 goto error_1; 251 } 252 253 ronly = 0; 254 } 255 /* 256 * Soft updates is incompatible with "async", 257 * so if we are doing softupdates stop the user 258 * from setting the async flag in an update. 259 * Softdep_mount() clears it in an initial mount 260 * or ro->rw remount. 261 */ 262 if (mp->mnt_flag & MNT_SOFTDEP) { 263 mp->mnt_flag &= ~MNT_ASYNC; 264 } 265 /* if not updating name...*/ 266 if (args.fspec == 0) { 267 /* 268 * Process export requests. Jumping to "success" 269 * will return the vfs_export() error code. 270 */ 271 err = vfs_export(mp, &ump->um_export, &args.export); 272 goto success; 273 } 274 } 275 276 /* 277 * Not an update, or updating the name: look up the name 278 * and verify that it refers to a sensible block device. 279 */ 280 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 281 err = namei(ndp); 282 if (err) { 283 /* can't get devvp!*/ 284 goto error_1; 285 } 286 287 devvp = ndp->ni_vp; 288 289 if (devvp->v_type != VBLK) { 290 err = ENOTBLK; 291 goto error_2; 292 } 293 if (bdevsw(devvp->v_rdev) == NULL) { 294 err = ENXIO; 295 goto error_2; 296 } 297 298 /* 299 * If mount by non-root, then verify that user has necessary 300 * permissions on the device. 301 */ 302 if (p->p_ucred->cr_uid != 0) { 303 accessmode = VREAD; 304 if ((mp->mnt_flag & MNT_RDONLY) == 0) 305 accessmode |= VWRITE; 306 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 307 if ((error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) != 0) { 308 vput(devvp); 309 return (error); 310 } 311 VOP_UNLOCK(devvp, 0, p); 312 } 313 314 if (mp->mnt_flag & MNT_UPDATE) { 315 /* 316 ******************** 317 * UPDATE 318 * If it's not the same vnode, or at least the same device 319 * then it's not correct. 320 ******************** 321 */ 322 323 if (devvp != ump->um_devvp) { 324 if ( devvp->v_rdev == ump->um_devvp->v_rdev) { 325 vrele(devvp); 326 } else { 327 err = EINVAL; /* needs translation */ 328 } 329 } else 330 vrele(devvp); 331 /* 332 * Update device name only on success 333 */ 334 if( !err) { 335 /* Save "mounted from" info for mount point (NULL pad)*/ 336 copyinstr( args.fspec, 337 mp->mnt_stat.f_mntfromname, 338 MNAMELEN - 1, 339 &size); 340 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 341 } 342 } else { 343 /* 344 ******************** 345 * NEW MOUNT 346 ******************** 347 */ 348 349 if (bdevsw(devvp->v_rdev)->d_flags & D_NOCLUSTERR) 350 mp->mnt_flag |= MNT_NOCLUSTERR; 351 if (bdevsw(devvp->v_rdev)->d_flags & D_NOCLUSTERW) 352 mp->mnt_flag |= MNT_NOCLUSTERW; 353 354 /* 355 * Since this is a new mount, we want the names for 356 * the device and the mount point copied in. If an 357 * error occurs, the mountpoint is discarded by the 358 * upper level code. 359 */ 360 /* Save "last mounted on" info for mount point (NULL pad)*/ 361 copyinstr( path, /* mount point*/ 362 mp->mnt_stat.f_mntonname, /* save area*/ 363 MNAMELEN - 1, /* max size*/ 364 &size); /* real size*/ 365 bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 366 367 /* Save "mounted from" info for mount point (NULL pad)*/ 368 copyinstr( args.fspec, /* device name*/ 369 mp->mnt_stat.f_mntfromname, /* save area*/ 370 MNAMELEN - 1, /* max size*/ 371 &size); /* real size*/ 372 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 373 374 err = ffs_mountfs(devvp, mp, p, M_FFSNODE); 375 } 376 if (err) { 377 goto error_2; 378 } 379 380 dostatfs: 381 /* 382 * Initialize FS stat information in mount struct; uses both 383 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 384 * 385 * This code is common to root and non-root mounts 386 */ 387 (void)VFS_STATFS(mp, &mp->mnt_stat, p); 388 389 goto success; 390 391 392 error_2: /* error with devvp held*/ 393 394 /* release devvp before failing*/ 395 vrele(devvp); 396 397 error_1: /* no state to back out*/ 398 399 success: 400 if (!err && path && (mp->mnt_flag & MNT_UPDATE)) { 401 /* Update clean flag after changing read-onlyness. */ 402 fs = ump->um_fs; 403 if (ronly != fs->fs_ronly) { 404 fs->fs_ronly = ronly; 405 fs->fs_clean = ronly && 406 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0; 407 ffs_sbupdate(ump, MNT_WAIT); 408 } 409 } 410 return (err); 411 } 412 413 /* 414 * Reload all incore data for a filesystem (used after running fsck on 415 * the root filesystem and finding things to fix). The filesystem must 416 * be mounted read-only. 417 * 418 * Things to do to update the mount: 419 * 1) invalidate all cached meta-data. 420 * 2) re-read superblock from disk. 421 * 3) re-read summary information from disk. 422 * 4) invalidate all inactive vnodes. 423 * 5) invalidate all cached file data. 424 * 6) re-read inode data for all active vnodes. 425 */ 426 static int 427 ffs_reload(mp, cred, p) 428 register struct mount *mp; 429 struct ucred *cred; 430 struct proc *p; 431 { 432 register struct vnode *vp, *nvp, *devvp; 433 struct inode *ip; 434 struct csum *space; 435 struct buf *bp; 436 struct fs *fs, *newfs; 437 struct partinfo dpart; 438 dev_t dev; 439 int i, blks, size, error; 440 int32_t *lp; 441 442 if ((mp->mnt_flag & MNT_RDONLY) == 0) 443 return (EINVAL); 444 /* 445 * Step 1: invalidate all cached meta-data. 446 */ 447 devvp = VFSTOUFS(mp)->um_devvp; 448 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 449 error = vinvalbuf(devvp, 0, cred, p, 0, 0); 450 VOP_UNLOCK(devvp, 0, p); 451 if (error) 452 panic("ffs_reload: dirty1"); 453 454 dev = devvp->v_rdev; 455 456 /* 457 * Only VMIO the backing device if the backing device is a real 458 * block device. See ffs_mountmfs() for more details. 459 */ 460 if (devvp->v_tag != VT_MFS && devvp->v_type == VBLK) { 461 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 462 vfs_object_create(devvp, p, p->p_ucred); 463 simple_lock(&devvp->v_interlock); 464 VOP_UNLOCK(devvp, LK_INTERLOCK, p); 465 } 466 467 /* 468 * Step 2: re-read superblock from disk. 469 */ 470 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) 471 size = DEV_BSIZE; 472 else 473 size = dpart.disklab->d_secsize; 474 if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, NOCRED,&bp)) != 0) 475 return (error); 476 newfs = (struct fs *)bp->b_data; 477 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || 478 newfs->fs_bsize < sizeof(struct fs)) { 479 brelse(bp); 480 return (EIO); /* XXX needs translation */ 481 } 482 fs = VFSTOUFS(mp)->um_fs; 483 /* 484 * Copy pointer fields back into superblock before copying in XXX 485 * new superblock. These should really be in the ufsmount. XXX 486 * Note that important parameters (eg fs_ncg) are unchanged. 487 */ 488 bcopy(&fs->fs_csp[0], &newfs->fs_csp[0], sizeof(fs->fs_csp)); 489 newfs->fs_maxcluster = fs->fs_maxcluster; 490 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 491 if (fs->fs_sbsize < SBSIZE) 492 bp->b_flags |= B_INVAL; 493 brelse(bp); 494 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 495 ffs_oldfscompat(fs); 496 497 /* 498 * Step 3: re-read summary information from disk. 499 */ 500 blks = howmany(fs->fs_cssize, fs->fs_fsize); 501 space = fs->fs_csp[0]; 502 for (i = 0; i < blks; i += fs->fs_frag) { 503 size = fs->fs_bsize; 504 if (i + fs->fs_frag > blks) 505 size = (blks - i) * fs->fs_fsize; 506 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 507 NOCRED, &bp); 508 if (error) 509 return (error); 510 bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size); 511 brelse(bp); 512 } 513 /* 514 * We no longer know anything about clusters per cylinder group. 515 */ 516 if (fs->fs_contigsumsize > 0) { 517 lp = fs->fs_maxcluster; 518 for (i = 0; i < fs->fs_ncg; i++) 519 *lp++ = fs->fs_contigsumsize; 520 } 521 522 loop: 523 simple_lock(&mntvnode_slock); 524 for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 525 if (vp->v_mount != mp) { 526 simple_unlock(&mntvnode_slock); 527 goto loop; 528 } 529 nvp = vp->v_mntvnodes.le_next; 530 /* 531 * Step 4: invalidate all inactive vnodes. 532 */ 533 if (vrecycle(vp, &mntvnode_slock, p)) 534 goto loop; 535 /* 536 * Step 5: invalidate all cached file data. 537 */ 538 simple_lock(&vp->v_interlock); 539 simple_unlock(&mntvnode_slock); 540 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p)) { 541 goto loop; 542 } 543 if (vinvalbuf(vp, 0, cred, p, 0, 0)) 544 panic("ffs_reload: dirty2"); 545 /* 546 * Step 6: re-read inode data for all active vnodes. 547 */ 548 ip = VTOI(vp); 549 error = 550 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 551 (int)fs->fs_bsize, NOCRED, &bp); 552 if (error) { 553 vput(vp); 554 return (error); 555 } 556 ip->i_din = *((struct dinode *)bp->b_data + 557 ino_to_fsbo(fs, ip->i_number)); 558 ip->i_effnlink = ip->i_nlink; 559 brelse(bp); 560 vput(vp); 561 simple_lock(&mntvnode_slock); 562 } 563 simple_unlock(&mntvnode_slock); 564 return (0); 565 } 566 567 /* 568 * Common code for mount and mountroot 569 */ 570 int 571 ffs_mountfs(devvp, mp, p, malloctype) 572 register struct vnode *devvp; 573 struct mount *mp; 574 struct proc *p; 575 struct malloc_type *malloctype; 576 { 577 register struct ufsmount *ump; 578 struct buf *bp; 579 register struct fs *fs; 580 dev_t dev; 581 struct partinfo dpart; 582 caddr_t base, space; 583 int error, i, blks, size, ronly; 584 int32_t *lp; 585 struct ucred *cred; 586 u_int64_t maxfilesize; /* XXX */ 587 size_t strsize; 588 int ncount; 589 590 dev = devvp->v_rdev; 591 cred = p ? p->p_ucred : NOCRED; 592 /* 593 * Disallow multiple mounts of the same device. 594 * Disallow mounting of a device that is currently in use 595 * (except for root, which might share swap device for miniroot). 596 * Flush out any old buffers remaining from a previous use. 597 */ 598 error = vfs_mountedon(devvp); 599 if (error) 600 return (error); 601 ncount = vcount(devvp); 602 603 if (ncount > 1 && devvp != rootvp) 604 return (EBUSY); 605 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 606 error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0); 607 VOP_UNLOCK(devvp, 0, p); 608 if (error) 609 return (error); 610 611 /* 612 * Only VMIO the backing device if the backing device is a real 613 * block device. This excludes the original MFS implementation. 614 * Note that it is optional that the backing device be VMIOed. This 615 * increases the opportunity for metadata caching. 616 */ 617 if (devvp->v_tag != VT_MFS && devvp->v_type == VBLK) { 618 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 619 vfs_object_create(devvp, p, p->p_ucred); 620 simple_lock(&devvp->v_interlock); 621 VOP_UNLOCK(devvp, LK_INTERLOCK, p); 622 } 623 624 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 625 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 626 if (error) 627 return (error); 628 629 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred, p) != 0) 630 size = DEV_BSIZE; 631 else 632 size = dpart.disklab->d_secsize; 633 634 bp = NULL; 635 ump = NULL; 636 if ((error = bread(devvp, SBLOCK, SBSIZE, cred, &bp)) != 0) 637 goto out; 638 fs = (struct fs *)bp->b_data; 639 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 640 fs->fs_bsize < sizeof(struct fs)) { 641 error = EINVAL; /* XXX needs translation */ 642 goto out; 643 } 644 fs->fs_fmod = 0; 645 fs->fs_flags &= ~FS_UNCLEAN; 646 if (fs->fs_clean == 0) { 647 fs->fs_flags |= FS_UNCLEAN; 648 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 649 printf( 650 "WARNING: %s was not properly dismounted\n", 651 fs->fs_fsmnt); 652 } else { 653 printf( 654 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 655 fs->fs_fsmnt); 656 error = EPERM; 657 goto out; 658 } 659 } 660 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ 661 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { 662 error = EROFS; /* needs translation */ 663 goto out; 664 } 665 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 666 bzero((caddr_t)ump, sizeof *ump); 667 ump->um_malloctype = malloctype; 668 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 669 M_WAITOK); 670 ump->um_blkatoff = ffs_blkatoff; 671 ump->um_truncate = ffs_truncate; 672 ump->um_update = ffs_update; 673 ump->um_valloc = ffs_valloc; 674 ump->um_vfree = ffs_vfree; 675 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 676 if (fs->fs_sbsize < SBSIZE) 677 bp->b_flags |= B_INVAL; 678 brelse(bp); 679 bp = NULL; 680 fs = ump->um_fs; 681 fs->fs_ronly = ronly; 682 if (ronly == 0) { 683 fs->fs_fmod = 1; 684 fs->fs_clean = 0; 685 } 686 size = fs->fs_cssize; 687 blks = howmany(size, fs->fs_fsize); 688 if (fs->fs_contigsumsize > 0) 689 size += fs->fs_ncg * sizeof(int32_t); 690 base = space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 691 for (i = 0; i < blks; i += fs->fs_frag) { 692 size = fs->fs_bsize; 693 if (i + fs->fs_frag > blks) 694 size = (blks - i) * fs->fs_fsize; 695 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 696 cred, &bp)) != 0) { 697 free(base, M_UFSMNT); 698 goto out; 699 } 700 bcopy(bp->b_data, space, (u_int)size); 701 fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; 702 space += size; 703 brelse(bp); 704 bp = NULL; 705 } 706 if (fs->fs_contigsumsize > 0) { 707 fs->fs_maxcluster = lp = (int32_t *)space; 708 for (i = 0; i < fs->fs_ncg; i++) 709 *lp++ = fs->fs_contigsumsize; 710 } 711 mp->mnt_data = (qaddr_t)ump; 712 mp->mnt_stat.f_fsid.val[0] = (long)dev; 713 if (fs->fs_id[0] != 0 && fs->fs_id[1] != 0) 714 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 715 else 716 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 717 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 718 mp->mnt_flag |= MNT_LOCAL; 719 ump->um_mountp = mp; 720 ump->um_dev = dev; 721 ump->um_devvp = devvp; 722 ump->um_nindir = fs->fs_nindir; 723 ump->um_bptrtodb = fs->fs_fsbtodb; 724 ump->um_seqinc = fs->fs_frag; 725 for (i = 0; i < MAXQUOTAS; i++) 726 ump->um_quotas[i] = NULLVP; 727 devvp->v_specmountpoint = mp; 728 ffs_oldfscompat(fs); 729 730 /* 731 * Set FS local "last mounted on" information (NULL pad) 732 */ 733 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 734 fs->fs_fsmnt, /* copy area*/ 735 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 736 &strsize); /* real size*/ 737 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 738 739 if( mp->mnt_flag & MNT_ROOTFS) { 740 /* 741 * Root mount; update timestamp in mount structure. 742 * this will be used by the common root mount code 743 * to update the system clock. 744 */ 745 mp->mnt_time = fs->fs_time; 746 } 747 748 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ 749 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ 750 if (fs->fs_maxfilesize > maxfilesize) /* XXX */ 751 fs->fs_maxfilesize = maxfilesize; /* XXX */ 752 if (ronly == 0) { 753 if ((fs->fs_flags & FS_DOSOFTDEP) && 754 (error = softdep_mount(devvp, mp, fs, cred)) != 0) { 755 free(base, M_UFSMNT); 756 goto out; 757 } 758 fs->fs_clean = 0; 759 (void) ffs_sbupdate(ump, MNT_WAIT); 760 } 761 return (0); 762 out: 763 devvp->v_specmountpoint = NULL; 764 if (bp) 765 brelse(bp); 766 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p); 767 if (ump) { 768 free(ump->um_fs, M_UFSMNT); 769 free(ump, M_UFSMNT); 770 mp->mnt_data = (qaddr_t)0; 771 } 772 return (error); 773 } 774 775 /* 776 * Sanity checks for old file systems. 777 * 778 * XXX - goes away some day. 779 */ 780 static int 781 ffs_oldfscompat(fs) 782 struct fs *fs; 783 { 784 785 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ 786 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ 787 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 788 fs->fs_nrpos = 8; /* XXX */ 789 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 790 #if 0 791 int i; /* XXX */ 792 u_int64_t sizepb = fs->fs_bsize; /* XXX */ 793 /* XXX */ 794 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ 795 for (i = 0; i < NIADDR; i++) { /* XXX */ 796 sizepb *= NINDIR(fs); /* XXX */ 797 fs->fs_maxfilesize += sizepb; /* XXX */ 798 } /* XXX */ 799 #endif 800 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 801 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ 802 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ 803 } /* XXX */ 804 return (0); 805 } 806 807 /* 808 * unmount system call 809 */ 810 int 811 ffs_unmount(mp, mntflags, p) 812 struct mount *mp; 813 int mntflags; 814 struct proc *p; 815 { 816 register struct ufsmount *ump; 817 register struct fs *fs; 818 int error, flags; 819 820 flags = 0; 821 if (mntflags & MNT_FORCE) { 822 flags |= FORCECLOSE; 823 } 824 if (mp->mnt_flag & MNT_SOFTDEP) { 825 if ((error = softdep_flushfiles(mp, flags, p)) != 0) 826 return (error); 827 } else { 828 if ((error = ffs_flushfiles(mp, flags, p)) != 0) 829 return (error); 830 } 831 ump = VFSTOUFS(mp); 832 fs = ump->um_fs; 833 if (fs->fs_ronly == 0) { 834 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1; 835 error = ffs_sbupdate(ump, MNT_WAIT); 836 if (error) { 837 fs->fs_clean = 0; 838 return (error); 839 } 840 } 841 ump->um_devvp->v_specmountpoint = NULL; 842 843 vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, p, 0, 0); 844 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 845 NOCRED, p); 846 847 vrele(ump->um_devvp); 848 849 free(fs->fs_csp[0], M_UFSMNT); 850 free(fs, M_UFSMNT); 851 free(ump, M_UFSMNT); 852 mp->mnt_data = (qaddr_t)0; 853 mp->mnt_flag &= ~MNT_LOCAL; 854 return (error); 855 } 856 857 /* 858 * Flush out all the files in a filesystem. 859 */ 860 int 861 ffs_flushfiles(mp, flags, p) 862 register struct mount *mp; 863 int flags; 864 struct proc *p; 865 { 866 register struct ufsmount *ump; 867 int error; 868 869 ump = VFSTOUFS(mp); 870 #ifdef QUOTA 871 if (mp->mnt_flag & MNT_QUOTA) { 872 int i; 873 error = vflush(mp, NULLVP, SKIPSYSTEM|flags); 874 if (error) 875 return (error); 876 for (i = 0; i < MAXQUOTAS; i++) { 877 if (ump->um_quotas[i] == NULLVP) 878 continue; 879 quotaoff(p, mp, i); 880 } 881 /* 882 * Here we fall through to vflush again to ensure 883 * that we have gotten rid of all the system vnodes. 884 */ 885 } 886 #endif 887 /* 888 * Flush all the files. 889 */ 890 if ((error = vflush(mp, NULL, flags)) != 0) 891 return (error); 892 /* 893 * Flush filesystem metadata. 894 */ 895 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p); 896 error = VOP_FSYNC(ump->um_devvp, p->p_ucred, MNT_WAIT, p); 897 VOP_UNLOCK(ump->um_devvp, 0, p); 898 return (error); 899 } 900 901 /* 902 * Get file system statistics. 903 */ 904 int 905 ffs_statfs(mp, sbp, p) 906 struct mount *mp; 907 register struct statfs *sbp; 908 struct proc *p; 909 { 910 register struct ufsmount *ump; 911 register struct fs *fs; 912 913 ump = VFSTOUFS(mp); 914 fs = ump->um_fs; 915 if (fs->fs_magic != FS_MAGIC) 916 panic("ffs_statfs"); 917 sbp->f_bsize = fs->fs_fsize; 918 sbp->f_iosize = fs->fs_bsize; 919 sbp->f_blocks = fs->fs_dsize; 920 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 921 fs->fs_cstotal.cs_nffree; 922 sbp->f_bavail = freespace(fs, fs->fs_minfree); 923 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 924 sbp->f_ffree = fs->fs_cstotal.cs_nifree; 925 if (sbp != &mp->mnt_stat) { 926 sbp->f_type = mp->mnt_vfc->vfc_typenum; 927 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 928 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 929 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 930 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 931 } 932 return (0); 933 } 934 935 /* 936 * Go through the disk queues to initiate sandbagged IO; 937 * go through the inodes to write those that have been modified; 938 * initiate the writing of the super block if it has been modified. 939 * 940 * Note: we are always called with the filesystem marked `MPBUSY'. 941 */ 942 int 943 ffs_sync(mp, waitfor, cred, p) 944 struct mount *mp; 945 int waitfor; 946 struct ucred *cred; 947 struct proc *p; 948 { 949 struct vnode *nvp, *vp; 950 struct inode *ip; 951 struct ufsmount *ump = VFSTOUFS(mp); 952 struct fs *fs; 953 int error, allerror = 0; 954 955 fs = ump->um_fs; 956 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 957 printf("fs = %s\n", fs->fs_fsmnt); 958 panic("ffs_sync: rofs mod"); 959 } 960 /* 961 * Write back each (modified) inode. 962 */ 963 simple_lock(&mntvnode_slock); 964 loop: 965 for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 966 /* 967 * If the vnode that we are about to sync is no longer 968 * associated with this mount point, start over. 969 */ 970 if (vp->v_mount != mp) 971 goto loop; 972 simple_lock(&vp->v_interlock); 973 nvp = vp->v_mntvnodes.le_next; 974 ip = VTOI(vp); 975 if ((vp->v_type == VNON) || (((ip->i_flag & 976 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0) && 977 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || (waitfor == MNT_LAZY)))) { 978 simple_unlock(&vp->v_interlock); 979 continue; 980 } 981 if (vp->v_type != VCHR) { 982 simple_unlock(&mntvnode_slock); 983 error = 984 vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p); 985 if (error) { 986 simple_lock(&mntvnode_slock); 987 if (error == ENOENT) 988 goto loop; 989 continue; 990 } 991 if ((error = VOP_FSYNC(vp, cred, waitfor, p)) != 0) 992 allerror = error; 993 VOP_UNLOCK(vp, 0, p); 994 vrele(vp); 995 simple_lock(&mntvnode_slock); 996 } else { 997 simple_unlock(&mntvnode_slock); 998 simple_unlock(&vp->v_interlock); 999 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */ 1000 UFS_UPDATE(vp, 0); 1001 simple_lock(&mntvnode_slock); 1002 } 1003 } 1004 simple_unlock(&mntvnode_slock); 1005 /* 1006 * Force stale file system control information to be flushed. 1007 */ 1008 if (waitfor != MNT_LAZY) { 1009 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP) 1010 waitfor = MNT_NOWAIT; 1011 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p); 1012 if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0) 1013 allerror = error; 1014 VOP_UNLOCK(ump->um_devvp, 0, p); 1015 } 1016 #ifdef QUOTA 1017 qsync(mp); 1018 #endif 1019 /* 1020 * Write back modified superblock. 1021 */ 1022 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1023 allerror = error; 1024 return (allerror); 1025 } 1026 1027 /* 1028 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1029 * in from disk. If it is in core, wait for the lock bit to clear, then 1030 * return the inode locked. Detection and handling of mount points must be 1031 * done by the calling routine. 1032 */ 1033 static int ffs_inode_hash_lock; 1034 1035 int 1036 ffs_vget(mp, ino, vpp) 1037 struct mount *mp; 1038 ino_t ino; 1039 struct vnode **vpp; 1040 { 1041 struct fs *fs; 1042 struct inode *ip; 1043 struct ufsmount *ump; 1044 struct buf *bp; 1045 struct vnode *vp; 1046 dev_t dev; 1047 int error; 1048 1049 ump = VFSTOUFS(mp); 1050 dev = ump->um_dev; 1051 restart: 1052 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) { 1053 return (0); 1054 } 1055 1056 /* 1057 * Lock out the creation of new entries in the FFS hash table in 1058 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 1059 * may occur! 1060 */ 1061 if (ffs_inode_hash_lock) { 1062 while (ffs_inode_hash_lock) { 1063 ffs_inode_hash_lock = -1; 1064 tsleep(&ffs_inode_hash_lock, PVM, "ffsvgt", 0); 1065 } 1066 goto restart; 1067 } 1068 ffs_inode_hash_lock = 1; 1069 1070 /* 1071 * If this MALLOC() is performed after the getnewvnode() 1072 * it might block, leaving a vnode with a NULL v_data to be 1073 * found by ffs_sync() if a sync happens to fire right then, 1074 * which will cause a panic because ffs_sync() blindly 1075 * dereferences vp->v_data (as well it should). 1076 */ 1077 MALLOC(ip, struct inode *, sizeof(struct inode), 1078 ump->um_malloctype, M_WAITOK); 1079 1080 /* Allocate a new vnode/inode. */ 1081 error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp); 1082 if (error) { 1083 if (ffs_inode_hash_lock < 0) 1084 wakeup(&ffs_inode_hash_lock); 1085 ffs_inode_hash_lock = 0; 1086 *vpp = NULL; 1087 FREE(ip, ump->um_malloctype); 1088 return (error); 1089 } 1090 bzero((caddr_t)ip, sizeof(struct inode)); 1091 lockinit(&ip->i_lock, PINOD, "inode", 0, 0); 1092 vp->v_data = ip; 1093 ip->i_vnode = vp; 1094 ip->i_fs = fs = ump->um_fs; 1095 ip->i_dev = dev; 1096 ip->i_number = ino; 1097 #ifdef QUOTA 1098 { 1099 int i; 1100 for (i = 0; i < MAXQUOTAS; i++) 1101 ip->i_dquot[i] = NODQUOT; 1102 } 1103 #endif 1104 /* 1105 * Put it onto its hash chain and lock it so that other requests for 1106 * this inode will block if they arrive while we are sleeping waiting 1107 * for old data structures to be purged or for the contents of the 1108 * disk portion of this inode to be read. 1109 */ 1110 ufs_ihashins(ip); 1111 1112 if (ffs_inode_hash_lock < 0) 1113 wakeup(&ffs_inode_hash_lock); 1114 ffs_inode_hash_lock = 0; 1115 1116 /* Read in the disk contents for the inode, copy into the inode. */ 1117 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1118 (int)fs->fs_bsize, NOCRED, &bp); 1119 if (error) { 1120 /* 1121 * The inode does not contain anything useful, so it would 1122 * be misleading to leave it on its hash chain. With mode 1123 * still zero, it will be unlinked and returned to the free 1124 * list by vput(). 1125 */ 1126 brelse(bp); 1127 vput(vp); 1128 *vpp = NULL; 1129 return (error); 1130 } 1131 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 1132 if (DOINGSOFTDEP(vp)) 1133 softdep_load_inodeblock(ip); 1134 else 1135 ip->i_effnlink = ip->i_nlink; 1136 bqrelse(bp); 1137 1138 /* 1139 * Initialize the vnode from the inode, check for aliases. 1140 * Note that the underlying vnode may have changed. 1141 */ 1142 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1143 if (error) { 1144 vput(vp); 1145 *vpp = NULL; 1146 return (error); 1147 } 1148 /* 1149 * Finish inode initialization now that aliasing has been resolved. 1150 */ 1151 ip->i_devvp = ump->um_devvp; 1152 VREF(ip->i_devvp); 1153 /* 1154 * Set up a generation number for this inode if it does not 1155 * already have one. This should only happen on old filesystems. 1156 */ 1157 if (ip->i_gen == 0) { 1158 ip->i_gen = random() / 2 + 1; 1159 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1160 ip->i_flag |= IN_MODIFIED; 1161 } 1162 /* 1163 * Ensure that uid and gid are correct. This is a temporary 1164 * fix until fsck has been changed to do the update. 1165 */ 1166 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1167 ip->i_uid = ip->i_din.di_ouid; /* XXX */ 1168 ip->i_gid = ip->i_din.di_ogid; /* XXX */ 1169 } /* XXX */ 1170 1171 *vpp = vp; 1172 return (0); 1173 } 1174 1175 /* 1176 * File handle to vnode 1177 * 1178 * Have to be really careful about stale file handles: 1179 * - check that the inode number is valid 1180 * - call ffs_vget() to get the locked inode 1181 * - check for an unallocated inode (i_mode == 0) 1182 * - check that the given client host has export rights and return 1183 * those rights via. exflagsp and credanonp 1184 */ 1185 int 1186 ffs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 1187 register struct mount *mp; 1188 struct fid *fhp; 1189 struct sockaddr *nam; 1190 struct vnode **vpp; 1191 int *exflagsp; 1192 struct ucred **credanonp; 1193 { 1194 register struct ufid *ufhp; 1195 struct fs *fs; 1196 1197 ufhp = (struct ufid *)fhp; 1198 fs = VFSTOUFS(mp)->um_fs; 1199 if (ufhp->ufid_ino < ROOTINO || 1200 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1201 return (ESTALE); 1202 return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); 1203 } 1204 1205 /* 1206 * Vnode pointer to File handle 1207 */ 1208 /* ARGSUSED */ 1209 int 1210 ffs_vptofh(vp, fhp) 1211 struct vnode *vp; 1212 struct fid *fhp; 1213 { 1214 register struct inode *ip; 1215 register struct ufid *ufhp; 1216 1217 ip = VTOI(vp); 1218 ufhp = (struct ufid *)fhp; 1219 ufhp->ufid_len = sizeof(struct ufid); 1220 ufhp->ufid_ino = ip->i_number; 1221 ufhp->ufid_gen = ip->i_gen; 1222 return (0); 1223 } 1224 1225 /* 1226 * Initialize the filesystem; just use ufs_init. 1227 */ 1228 static int 1229 ffs_init(vfsp) 1230 struct vfsconf *vfsp; 1231 { 1232 1233 softdep_initialize(); 1234 return (ufs_init(vfsp)); 1235 } 1236 1237 /* 1238 * Write a superblock and associated information back to disk. 1239 */ 1240 static int 1241 ffs_sbupdate(mp, waitfor) 1242 struct ufsmount *mp; 1243 int waitfor; 1244 { 1245 register struct fs *dfs, *fs = mp->um_fs; 1246 register struct buf *bp; 1247 int blks; 1248 caddr_t space; 1249 int i, size, error, allerror = 0; 1250 1251 /* 1252 * First write back the summary information. 1253 */ 1254 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1255 space = (caddr_t)fs->fs_csp[0]; 1256 for (i = 0; i < blks; i += fs->fs_frag) { 1257 size = fs->fs_bsize; 1258 if (i + fs->fs_frag > blks) 1259 size = (blks - i) * fs->fs_fsize; 1260 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1261 size, 0, 0); 1262 bcopy(space, bp->b_data, (u_int)size); 1263 space += size; 1264 if (waitfor != MNT_WAIT) 1265 bawrite(bp); 1266 else if ((error = bwrite(bp)) != 0) 1267 allerror = error; 1268 } 1269 /* 1270 * Now write back the superblock itself. If any errors occurred 1271 * up to this point, then fail so that the superblock avoids 1272 * being written out as clean. 1273 */ 1274 if (allerror) 1275 return (allerror); 1276 bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0); 1277 fs->fs_fmod = 0; 1278 fs->fs_time = time_second; 1279 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1280 /* Restore compatibility to old file systems. XXX */ 1281 dfs = (struct fs *)bp->b_data; /* XXX */ 1282 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 1283 dfs->fs_nrpos = -1; /* XXX */ 1284 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1285 int32_t *lp, tmp; /* XXX */ 1286 /* XXX */ 1287 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ 1288 tmp = lp[4]; /* XXX */ 1289 for (i = 4; i > 0; i--) /* XXX */ 1290 lp[i] = lp[i-1]; /* XXX */ 1291 lp[0] = tmp; /* XXX */ 1292 } /* XXX */ 1293 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ 1294 if (waitfor != MNT_WAIT) 1295 bawrite(bp); 1296 else if ((error = bwrite(bp)) != 0) 1297 allerror = error; 1298 return (allerror); 1299 } 1300