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 * $DragonFly: src/sys/vfs/ufs/ffs_vfsops.c,v 1.10 2003/08/07 21:17:44 dillon Exp $ 36 */ 37 38 #include "opt_quota.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/proc.h> 43 #include <sys/namei.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/disklabel.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 static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part"); 66 67 static int ffs_sbupdate __P((struct ufsmount *, int)); 68 static int ffs_reload __P((struct mount *,struct ucred *,struct thread *)); 69 static int ffs_oldfscompat __P((struct fs *)); 70 static int ffs_mount __P((struct mount *, char *, caddr_t, 71 struct nameidata *, struct thread *)); 72 static int ffs_init __P((struct vfsconf *)); 73 74 static struct vfsops ufs_vfsops = { 75 ffs_mount, 76 ufs_start, 77 ffs_unmount, 78 ufs_root, 79 ufs_quotactl, 80 ffs_statfs, 81 ffs_sync, 82 ffs_vget, 83 ffs_fhtovp, 84 ufs_check_export, 85 ffs_vptofh, 86 ffs_init, 87 vfs_stduninit, 88 vfs_stdextattrctl, 89 }; 90 91 VFS_SET(ufs_vfsops, ufs, 0); 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 * ndp <unused> 104 * p process (user credentials check [statfs]) 105 * 106 * mount 107 * mp mount point structure 108 * path path to mount point 109 * data pointer to argument struct in user space 110 * ndp mount point namei() return (used for 111 * credentials on reload), reused to look 112 * up block device. 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 * namei() if it is a genuine NULL from the user. 129 */ 130 static int 131 ffs_mount( mp, path, data, ndp, td) 132 struct mount *mp; /* mount struct pointer*/ 133 char *path; /* path to mount point*/ 134 caddr_t data; /* arguments to FS specific mount*/ 135 struct nameidata *ndp; /* mount point credentials*/ 136 struct thread *td; /* process requesting mount*/ 137 { 138 size_t size; 139 int err = 0; 140 struct vnode *devvp; 141 142 struct ufs_args args; 143 struct ufsmount *ump = 0; 144 struct fs *fs; 145 int error, flags, ronly = 0; 146 mode_t accessmode; 147 struct ucred *cred; 148 149 KKASSERT(td->td_proc); 150 cred = td->td_proc->p_ucred; 151 152 /* 153 * Use NULL path to flag a root mount 154 */ 155 if( path == NULL) { 156 /* 157 *** 158 * Mounting root file system 159 *** 160 */ 161 162 if ((err = bdevvp(rootdev, &rootvp))) { 163 printf("ffs_mountroot: can't find rootvp\n"); 164 return (err); 165 } 166 167 if( ( err = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) { 168 /* fs specific cleanup (if any)*/ 169 goto error_1; 170 } 171 172 goto dostatfs; /* success*/ 173 174 } 175 176 /* 177 *** 178 * Mounting non-root file system or updating a file system 179 *** 180 */ 181 182 /* copy in user arguments*/ 183 err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)); 184 if (err) 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 err = 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, td); 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 err = softdep_flushfiles(mp, flags, td); 211 } else { 212 err = ffs_flushfiles(mp, flags, td); 213 } 214 ronly = 1; 215 } 216 if (!err && (mp->mnt_flag & MNT_RELOAD)) 217 err = ffs_reload(mp, ndp->ni_cnd.cn_cred, td); 218 if (err) { 219 goto error_1; 220 } 221 if (ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 222 /* 223 * If upgrade to read-write by non-root, then verify 224 * that user has necessary permissions on the device. 225 */ 226 if (cred->cr_uid != 0) { 227 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 228 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 229 cred, td)) != 0) { 230 VOP_UNLOCK(devvp, 0, td); 231 return (error); 232 } 233 VOP_UNLOCK(devvp, 0, td); 234 } 235 236 fs->fs_flags &= ~FS_UNCLEAN; 237 if (fs->fs_clean == 0) { 238 fs->fs_flags |= FS_UNCLEAN; 239 if (mp->mnt_flag & MNT_FORCE) { 240 printf( 241 "WARNING: %s was not properly dismounted\n", 242 fs->fs_fsmnt); 243 } else { 244 printf( 245 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 246 fs->fs_fsmnt); 247 err = EPERM; 248 goto error_1; 249 } 250 } 251 252 /* check to see if we need to start softdep */ 253 if (fs->fs_flags & FS_DOSOFTDEP) { 254 err = softdep_mount(devvp, mp, fs); 255 if (err) 256 goto error_1; 257 } 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 err = 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 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 287 err = namei(ndp); 288 if (err) { 289 /* can't get devvp!*/ 290 goto error_1; 291 } 292 293 NDFREE(ndp, NDF_ONLY_PNBUF); 294 devvp = ndp->ni_vp; 295 296 if (!vn_isdisk(devvp, &err)) 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, td); 308 if ((error = VOP_ACCESS(devvp, accessmode, cred, td)) != 0) { 309 vput(devvp); 310 return (error); 311 } 312 VOP_UNLOCK(devvp, 0, td); 313 } 314 315 if (mp->mnt_flag & MNT_UPDATE) { 316 /* 317 ******************** 318 * UPDATE 319 * If it's not the same vnode, or at least the same device 320 * then it's not correct. 321 ******************** 322 */ 323 324 if (devvp != ump->um_devvp) { 325 if ( devvp->v_rdev == ump->um_devvp->v_rdev) { 326 vrele(devvp); 327 } else { 328 err = EINVAL; /* needs translation */ 329 } 330 } else 331 vrele(devvp); 332 /* 333 * Update device name only on success 334 */ 335 if( !err) { 336 /* Save "mounted from" info for mount point (NULL pad)*/ 337 copyinstr( args.fspec, 338 mp->mnt_stat.f_mntfromname, 339 MNAMELEN - 1, 340 &size); 341 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 342 } 343 } else { 344 /* 345 ******************** 346 * NEW MOUNT 347 ******************** 348 */ 349 350 /* 351 * Since this is a new mount, we want the names for 352 * the device and the mount point copied in. If an 353 * error occurs, the mountpoint is discarded by the 354 * upper level code. 355 */ 356 /* Save "last mounted on" info for mount point (NULL pad)*/ 357 copyinstr( path, /* mount point*/ 358 mp->mnt_stat.f_mntonname, /* save area*/ 359 MNAMELEN - 1, /* max size*/ 360 &size); /* real size*/ 361 bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 362 363 /* Save "mounted from" info for mount point (NULL pad)*/ 364 copyinstr( args.fspec, /* device name*/ 365 mp->mnt_stat.f_mntfromname, /* save area*/ 366 MNAMELEN - 1, /* max size*/ 367 &size); /* real size*/ 368 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 369 370 err = ffs_mountfs(devvp, mp, td, M_FFSNODE); 371 } 372 if (err) { 373 goto error_2; 374 } 375 376 dostatfs: 377 /* 378 * Initialize FS stat information in mount struct; uses both 379 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 380 * 381 * This code is common to root and non-root mounts 382 */ 383 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 384 385 goto success; 386 387 388 error_2: /* error with devvp held*/ 389 390 /* release devvp before failing*/ 391 vrele(devvp); 392 393 error_1: /* no state to back out*/ 394 395 success: 396 if (!err && path && (mp->mnt_flag & MNT_UPDATE)) { 397 /* Update clean flag after changing read-onlyness. */ 398 fs = ump->um_fs; 399 if (ronly != fs->fs_ronly) { 400 fs->fs_ronly = ronly; 401 fs->fs_clean = ronly && 402 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0; 403 ffs_sbupdate(ump, MNT_WAIT); 404 } 405 } 406 return (err); 407 } 408 409 /* 410 * Reload all incore data for a filesystem (used after running fsck on 411 * the root filesystem and finding things to fix). The filesystem must 412 * be mounted read-only. 413 * 414 * Things to do to update the mount: 415 * 1) invalidate all cached meta-data. 416 * 2) re-read superblock from disk. 417 * 3) re-read summary information from disk. 418 * 4) invalidate all inactive vnodes. 419 * 5) invalidate all cached file data. 420 * 6) re-read inode data for all active vnodes. 421 */ 422 static int 423 ffs_reload(struct mount *mp, struct ucred *cred, struct thread *td) 424 { 425 struct vnode *vp, *nvp, *devvp; 426 struct inode *ip; 427 void *space; 428 struct buf *bp; 429 struct fs *fs, *newfs; 430 struct partinfo dpart; 431 dev_t dev; 432 int i, blks, size, error; 433 int gen; 434 int vgen; 435 int32_t *lp; 436 437 if ((mp->mnt_flag & MNT_RDONLY) == 0) 438 return (EINVAL); 439 /* 440 * Step 1: invalidate all cached meta-data. 441 */ 442 devvp = VFSTOUFS(mp)->um_devvp; 443 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 444 error = vinvalbuf(devvp, 0, td, 0, 0); 445 VOP_UNLOCK(devvp, 0, td); 446 if (error) 447 panic("ffs_reload: dirty1"); 448 449 dev = devvp->v_rdev; 450 451 /* 452 * Only VMIO the backing device if the backing device is a real 453 * block device. See ffs_mountmfs() for more details. 454 */ 455 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 456 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 457 vfs_object_create(devvp, td); 458 lwkt_gettoken(&devvp->v_interlock); 459 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 460 } 461 462 /* 463 * Step 2: re-read superblock from disk. 464 */ 465 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0) 466 size = DEV_BSIZE; 467 else 468 size = dpart.disklab->d_secsize; 469 if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, &bp)) != 0) 470 return (error); 471 newfs = (struct fs *)bp->b_data; 472 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || 473 newfs->fs_bsize < sizeof(struct fs)) { 474 brelse(bp); 475 return (EIO); /* XXX needs translation */ 476 } 477 fs = VFSTOUFS(mp)->um_fs; 478 /* 479 * Copy pointer fields back into superblock before copying in XXX 480 * new superblock. These should really be in the ufsmount. XXX 481 * Note that important parameters (eg fs_ncg) are unchanged. 482 */ 483 newfs->fs_csp = fs->fs_csp; 484 newfs->fs_maxcluster = fs->fs_maxcluster; 485 newfs->fs_contigdirs = fs->fs_contigdirs; 486 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 487 if (fs->fs_sbsize < SBSIZE) 488 bp->b_flags |= B_INVAL; 489 brelse(bp); 490 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 491 ffs_oldfscompat(fs); 492 /* An old fsck may have zeroed these fields, so recheck them. */ 493 if (fs->fs_avgfilesize <= 0) /* XXX */ 494 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 495 if (fs->fs_avgfpdir <= 0) /* XXX */ 496 fs->fs_avgfpdir = AFPDIR; /* XXX */ 497 498 /* 499 * Step 3: re-read summary information from disk. 500 */ 501 blks = howmany(fs->fs_cssize, fs->fs_fsize); 502 space = fs->fs_csp; 503 for (i = 0; i < blks; i += fs->fs_frag) { 504 size = fs->fs_bsize; 505 if (i + fs->fs_frag > blks) 506 size = (blks - i) * fs->fs_fsize; 507 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, &bp); 508 if (error) 509 return (error); 510 bcopy(bp->b_data, space, (u_int)size); 511 space = (char *)space + size; 512 brelse(bp); 513 } 514 /* 515 * We no longer know anything about clusters per cylinder group. 516 */ 517 if (fs->fs_contigsumsize > 0) { 518 lp = fs->fs_maxcluster; 519 for (i = 0; i < fs->fs_ncg; i++) 520 *lp++ = fs->fs_contigsumsize; 521 } 522 523 gen = lwkt_gettoken(&mntvnode_token); 524 loop: 525 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 526 if (vp->v_mount != mp) { 527 lwkt_gentoken(&mntvnode_token, &gen); 528 goto loop; 529 } 530 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 531 /* 532 * Step 4: invalidate all inactive vnodes. 533 */ 534 if (vrecycle(vp, NULL, td)) { 535 lwkt_gentoken(&mntvnode_token, &gen); 536 goto loop; 537 } 538 /* 539 * Step 5: invalidate all cached file data. 540 */ 541 vgen = lwkt_gettoken(&vp->v_interlock); 542 if (lwkt_gentoken(&mntvnode_token, &gen) != 0 || 543 lwkt_gentoken(&vp->v_interlock, &vgen) != 0) { 544 lwkt_reltoken(&vp->v_interlock); 545 lwkt_gentoken(&mntvnode_token, &gen); 546 goto loop; 547 } 548 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 549 lwkt_gentoken(&mntvnode_token, &gen); 550 goto loop; 551 } 552 if (vinvalbuf(vp, 0, td, 0, 0)) 553 panic("ffs_reload: dirty2"); 554 /* 555 * Step 6: re-read inode data for all active vnodes. 556 */ 557 ip = VTOI(vp); 558 error = 559 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 560 (int)fs->fs_bsize, &bp); 561 if (error) { 562 vput(vp); 563 lwkt_reltoken(&mntvnode_token); 564 return (error); 565 } 566 ip->i_din = *((struct dinode *)bp->b_data + 567 ino_to_fsbo(fs, ip->i_number)); 568 ip->i_effnlink = ip->i_nlink; 569 brelse(bp); 570 vput(vp); 571 } 572 lwkt_reltoken(&mntvnode_token); 573 return (0); 574 } 575 576 /* 577 * Common code for mount and mountroot 578 */ 579 int 580 ffs_mountfs(devvp, mp, td, malloctype) 581 struct vnode *devvp; 582 struct mount *mp; 583 struct thread *td; 584 struct malloc_type *malloctype; 585 { 586 struct ufsmount *ump; 587 struct buf *bp; 588 struct fs *fs; 589 dev_t dev; 590 struct partinfo dpart; 591 void *space; 592 int error, i, blks, size, ronly; 593 int32_t *lp; 594 u_int64_t maxfilesize; /* XXX */ 595 size_t strsize; 596 int ncount; 597 598 dev = devvp->v_rdev; 599 /* 600 * Disallow multiple mounts of the same device. 601 * Disallow mounting of a device that is currently in use 602 * (except for root, which might share swap device for miniroot). 603 * Flush out any old buffers remaining from a previous use. 604 */ 605 error = vfs_mountedon(devvp); 606 if (error) 607 return (error); 608 ncount = vcount(devvp); 609 610 if (ncount > 1 && devvp != rootvp) 611 return (EBUSY); 612 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 613 error = vinvalbuf(devvp, V_SAVE, td, 0, 0); 614 VOP_UNLOCK(devvp, 0, td); 615 if (error) 616 return (error); 617 618 /* 619 * Only VMIO the backing device if the backing device is a real 620 * block device. This excludes the original MFS implementation. 621 * Note that it is optional that the backing device be VMIOed. This 622 * increases the opportunity for metadata caching. 623 */ 624 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 625 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 626 vfs_object_create(devvp, td); 627 lwkt_gettoken(&devvp->v_interlock); 628 VOP_UNLOCK(devvp, LK_INTERLOCK, td); 629 } 630 631 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 632 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 633 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); 634 VOP_UNLOCK(devvp, 0, td); 635 if (error) 636 return (error); 637 if (devvp->v_rdev->si_iosize_max != 0) 638 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 639 if (mp->mnt_iosize_max > MAXPHYS) 640 mp->mnt_iosize_max = MAXPHYS; 641 642 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, proc0.p_ucred, td) != 0) 643 size = DEV_BSIZE; 644 else 645 size = dpart.disklab->d_secsize; 646 647 bp = NULL; 648 ump = NULL; 649 if ((error = bread(devvp, SBLOCK, SBSIZE, &bp)) != 0) 650 goto out; 651 fs = (struct fs *)bp->b_data; 652 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 653 fs->fs_bsize < sizeof(struct fs)) { 654 error = EINVAL; /* XXX needs translation */ 655 goto out; 656 } 657 fs->fs_fmod = 0; 658 fs->fs_flags &= ~FS_UNCLEAN; 659 if (fs->fs_clean == 0) { 660 fs->fs_flags |= FS_UNCLEAN; 661 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 662 printf( 663 "WARNING: %s was not properly dismounted\n", 664 fs->fs_fsmnt); 665 } else { 666 printf( 667 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 668 fs->fs_fsmnt); 669 error = EPERM; 670 goto out; 671 } 672 } 673 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ 674 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { 675 error = EROFS; /* needs translation */ 676 goto out; 677 } 678 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 679 bzero((caddr_t)ump, sizeof *ump); 680 ump->um_malloctype = malloctype; 681 ump->um_i_effnlink_valid = 1; 682 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 683 M_WAITOK); 684 ump->um_blkatoff = ffs_blkatoff; 685 ump->um_truncate = ffs_truncate; 686 ump->um_update = ffs_update; 687 ump->um_valloc = ffs_valloc; 688 ump->um_vfree = ffs_vfree; 689 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 690 if (fs->fs_sbsize < SBSIZE) 691 bp->b_flags |= B_INVAL; 692 brelse(bp); 693 bp = NULL; 694 fs = ump->um_fs; 695 fs->fs_ronly = ronly; 696 size = fs->fs_cssize; 697 blks = howmany(size, fs->fs_fsize); 698 if (fs->fs_contigsumsize > 0) 699 size += fs->fs_ncg * sizeof(int32_t); 700 size += fs->fs_ncg * sizeof(u_int8_t); 701 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 702 fs->fs_csp = space; 703 for (i = 0; i < blks; i += fs->fs_frag) { 704 size = fs->fs_bsize; 705 if (i + fs->fs_frag > blks) 706 size = (blks - i) * fs->fs_fsize; 707 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 708 &bp)) != 0) { 709 free(fs->fs_csp, M_UFSMNT); 710 goto out; 711 } 712 bcopy(bp->b_data, space, (u_int)size); 713 space = (char *)space + size; 714 brelse(bp); 715 bp = NULL; 716 } 717 if (fs->fs_contigsumsize > 0) { 718 fs->fs_maxcluster = lp = space; 719 for (i = 0; i < fs->fs_ncg; i++) 720 *lp++ = fs->fs_contigsumsize; 721 space = lp; 722 } 723 size = fs->fs_ncg * sizeof(u_int8_t); 724 fs->fs_contigdirs = (u_int8_t *)space; 725 bzero(fs->fs_contigdirs, size); 726 /* Compatibility for old filesystems XXX */ 727 if (fs->fs_avgfilesize <= 0) /* XXX */ 728 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 729 if (fs->fs_avgfpdir <= 0) /* XXX */ 730 fs->fs_avgfpdir = AFPDIR; /* XXX */ 731 mp->mnt_data = (qaddr_t)ump; 732 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 733 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 734 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 735 vfs_getvfs(&mp->mnt_stat.f_fsid)) 736 vfs_getnewfsid(mp); 737 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 738 mp->mnt_flag |= MNT_LOCAL; 739 ump->um_mountp = mp; 740 ump->um_dev = dev; 741 ump->um_devvp = devvp; 742 ump->um_nindir = fs->fs_nindir; 743 ump->um_bptrtodb = fs->fs_fsbtodb; 744 ump->um_seqinc = fs->fs_frag; 745 for (i = 0; i < MAXQUOTAS; i++) 746 ump->um_quotas[i] = NULLVP; 747 devvp->v_specmountpoint = mp; 748 ffs_oldfscompat(fs); 749 750 /* 751 * Set FS local "last mounted on" information (NULL pad) 752 */ 753 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 754 fs->fs_fsmnt, /* copy area*/ 755 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 756 &strsize); /* real size*/ 757 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 758 759 if( mp->mnt_flag & MNT_ROOTFS) { 760 /* 761 * Root mount; update timestamp in mount structure. 762 * this will be used by the common root mount code 763 * to update the system clock. 764 */ 765 mp->mnt_time = fs->fs_time; 766 } 767 768 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ 769 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ 770 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */ 771 if (maxfilesize > (u_int64_t)0x80000000u * PAGE_SIZE - 1) 772 maxfilesize = (u_int64_t)0x80000000u * PAGE_SIZE - 1; 773 if (fs->fs_maxfilesize > maxfilesize) /* XXX */ 774 fs->fs_maxfilesize = maxfilesize; /* XXX */ 775 if (ronly == 0) { 776 if ((fs->fs_flags & FS_DOSOFTDEP) && 777 (error = softdep_mount(devvp, mp, fs)) != 0) { 778 free(fs->fs_csp, M_UFSMNT); 779 goto out; 780 } 781 fs->fs_fmod = 1; 782 fs->fs_clean = 0; 783 (void) ffs_sbupdate(ump, MNT_WAIT); 784 } 785 return (0); 786 out: 787 devvp->v_specmountpoint = NULL; 788 if (bp) 789 brelse(bp); 790 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td); 791 if (ump) { 792 free(ump->um_fs, M_UFSMNT); 793 free(ump, M_UFSMNT); 794 mp->mnt_data = (qaddr_t)0; 795 } 796 return (error); 797 } 798 799 /* 800 * Sanity checks for old file systems. 801 * 802 * XXX - goes away some day. 803 */ 804 static int 805 ffs_oldfscompat(fs) 806 struct fs *fs; 807 { 808 809 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ 810 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ 811 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 812 fs->fs_nrpos = 8; /* XXX */ 813 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 814 #if 0 815 int i; /* XXX */ 816 u_int64_t sizepb = fs->fs_bsize; /* XXX */ 817 /* XXX */ 818 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ 819 for (i = 0; i < NIADDR; i++) { /* XXX */ 820 sizepb *= NINDIR(fs); /* XXX */ 821 fs->fs_maxfilesize += sizepb; /* XXX */ 822 } /* XXX */ 823 #endif 824 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 825 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ 826 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ 827 } /* XXX */ 828 return (0); 829 } 830 831 /* 832 * unmount system call 833 */ 834 int 835 ffs_unmount(struct mount *mp, int mntflags, struct thread *td) 836 { 837 struct ufsmount *ump; 838 struct fs *fs; 839 int error, flags; 840 841 flags = 0; 842 if (mntflags & MNT_FORCE) { 843 flags |= FORCECLOSE; 844 } 845 if (mp->mnt_flag & MNT_SOFTDEP) { 846 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 847 return (error); 848 } else { 849 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 850 return (error); 851 } 852 ump = VFSTOUFS(mp); 853 fs = ump->um_fs; 854 if (fs->fs_ronly == 0) { 855 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1; 856 error = ffs_sbupdate(ump, MNT_WAIT); 857 if (error) { 858 fs->fs_clean = 0; 859 return (error); 860 } 861 } 862 ump->um_devvp->v_specmountpoint = NULL; 863 864 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 865 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, td); 866 867 vrele(ump->um_devvp); 868 869 free(fs->fs_csp, M_UFSMNT); 870 free(fs, M_UFSMNT); 871 free(ump, M_UFSMNT); 872 mp->mnt_data = (qaddr_t)0; 873 mp->mnt_flag &= ~MNT_LOCAL; 874 return (error); 875 } 876 877 /* 878 * Flush out all the files in a filesystem. 879 */ 880 int 881 ffs_flushfiles(struct mount *mp, int flags, struct thread *td) 882 { 883 struct ufsmount *ump; 884 int error; 885 886 ump = VFSTOUFS(mp); 887 #ifdef QUOTA 888 if (mp->mnt_flag & MNT_QUOTA) { 889 int i; 890 error = vflush(mp, 0, SKIPSYSTEM|flags); 891 if (error) 892 return (error); 893 for (i = 0; i < MAXQUOTAS; i++) { 894 if (ump->um_quotas[i] == NULLVP) 895 continue; 896 quotaoff(td, mp, i); 897 } 898 /* 899 * Here we fall through to vflush again to ensure 900 * that we have gotten rid of all the system vnodes. 901 */ 902 } 903 #endif 904 /* 905 * Flush all the files. 906 */ 907 if ((error = vflush(mp, 0, flags)) != 0) 908 return (error); 909 /* 910 * Flush filesystem metadata. 911 */ 912 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 913 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 914 VOP_UNLOCK(ump->um_devvp, 0, td); 915 return (error); 916 } 917 918 /* 919 * Get file system statistics. 920 */ 921 int 922 ffs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 923 { 924 struct ufsmount *ump; 925 struct fs *fs; 926 927 ump = VFSTOUFS(mp); 928 fs = ump->um_fs; 929 if (fs->fs_magic != FS_MAGIC) 930 panic("ffs_statfs"); 931 sbp->f_bsize = fs->fs_fsize; 932 sbp->f_iosize = fs->fs_bsize; 933 sbp->f_blocks = fs->fs_dsize; 934 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 935 fs->fs_cstotal.cs_nffree; 936 sbp->f_bavail = freespace(fs, fs->fs_minfree); 937 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 938 sbp->f_ffree = fs->fs_cstotal.cs_nifree; 939 if (sbp != &mp->mnt_stat) { 940 sbp->f_type = mp->mnt_vfc->vfc_typenum; 941 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 942 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 943 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 944 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 945 } 946 return (0); 947 } 948 949 /* 950 * Go through the disk queues to initiate sandbagged IO; 951 * go through the inodes to write those that have been modified; 952 * initiate the writing of the super block if it has been modified. 953 * 954 * Note: we are always called with the filesystem marked `MPBUSY'. 955 */ 956 int 957 ffs_sync(struct mount *mp, int waitfor, struct thread *td) 958 { 959 struct vnode *nvp, *vp; 960 struct inode *ip; 961 struct ufsmount *ump = VFSTOUFS(mp); 962 struct fs *fs; 963 int error, allerror = 0; 964 965 fs = ump->um_fs; 966 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 967 printf("fs = %s\n", fs->fs_fsmnt); 968 panic("ffs_sync: rofs mod"); 969 } 970 /* 971 * Write back each (modified) inode. 972 */ 973 lwkt_gettoken(&mntvnode_token); 974 loop: 975 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { 976 /* 977 * If the vnode that we are about to sync is no longer 978 * associated with this mount point, start over. 979 */ 980 if (vp->v_mount != mp) 981 goto loop; 982 983 /* 984 * Depend on the mntvnode_token to keep things stable enough 985 * for a quick test. Since there might be hundreds of 986 * thousands of vnodes, we cannot afford even a subroutine 987 * call unless there's a good chance that we have work to do. 988 */ 989 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 990 ip = VTOI(vp); 991 if (vp->v_type == VNON || ((ip->i_flag & 992 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 993 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 994 continue; 995 } 996 if (vp->v_type != VCHR) { 997 lwkt_reltoken(&mntvnode_token); 998 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT, td); 999 if (error) { 1000 lwkt_gettoken(&mntvnode_token); 1001 if (error == ENOENT) 1002 goto loop; 1003 } else { 1004 if ((error = VOP_FSYNC(vp, waitfor, td)) != 0) 1005 allerror = error; 1006 VOP_UNLOCK(vp, 0, td); 1007 vrele(vp); 1008 lwkt_gettoken(&mntvnode_token); 1009 } 1010 } else { 1011 /* 1012 * We must reference the vp to prevent it from 1013 * getting ripped out from under UFS_UPDATE, since 1014 * we are not holding a vnode lock. XXX why aren't 1015 * we holding a vnode lock? 1016 */ 1017 VREF(vp); 1018 lwkt_reltoken(&mntvnode_token); 1019 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */ 1020 UFS_UPDATE(vp, 0); 1021 vrele(vp); 1022 lwkt_gettoken(&mntvnode_token); 1023 } 1024 if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp) 1025 goto loop; 1026 } 1027 lwkt_reltoken(&mntvnode_token); 1028 /* 1029 * Force stale file system control information to be flushed. 1030 */ 1031 if (waitfor != MNT_LAZY) { 1032 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP) 1033 waitfor = MNT_NOWAIT; 1034 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); 1035 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0) 1036 allerror = error; 1037 VOP_UNLOCK(ump->um_devvp, 0, td); 1038 } 1039 #ifdef QUOTA 1040 qsync(mp); 1041 #endif 1042 /* 1043 * Write back modified superblock. 1044 */ 1045 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1046 allerror = error; 1047 return (allerror); 1048 } 1049 1050 /* 1051 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1052 * in from disk. If it is in core, wait for the lock bit to clear, then 1053 * return the inode locked. Detection and handling of mount points must be 1054 * done by the calling routine. 1055 */ 1056 static int ffs_inode_hash_lock; 1057 1058 int 1059 ffs_vget(mp, ino, vpp) 1060 struct mount *mp; 1061 ino_t ino; 1062 struct vnode **vpp; 1063 { 1064 struct fs *fs; 1065 struct inode *ip; 1066 struct ufsmount *ump; 1067 struct buf *bp; 1068 struct vnode *vp; 1069 dev_t dev; 1070 int error; 1071 1072 ump = VFSTOUFS(mp); 1073 dev = ump->um_dev; 1074 restart: 1075 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) { 1076 return (0); 1077 } 1078 1079 /* 1080 * Lock out the creation of new entries in the FFS hash table in 1081 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 1082 * may occur! 1083 */ 1084 if (ffs_inode_hash_lock) { 1085 while (ffs_inode_hash_lock) { 1086 ffs_inode_hash_lock = -1; 1087 tsleep(&ffs_inode_hash_lock, 0, "ffsvgt", 0); 1088 } 1089 goto restart; 1090 } 1091 ffs_inode_hash_lock = 1; 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 MALLOC(ip, struct inode *, sizeof(struct inode), 1101 ump->um_malloctype, M_WAITOK); 1102 1103 /* Allocate a new vnode/inode. */ 1104 error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp); 1105 if (error) { 1106 if (ffs_inode_hash_lock < 0) 1107 wakeup(&ffs_inode_hash_lock); 1108 ffs_inode_hash_lock = 0; 1109 *vpp = NULL; 1110 FREE(ip, ump->um_malloctype); 1111 return (error); 1112 } 1113 bzero((caddr_t)ip, sizeof(struct inode)); 1114 lockinit(&ip->i_lock, 0, "inode", VLKTIMEOUT, LK_CANRECURSE); 1115 vp->v_data = ip; 1116 /* 1117 * FFS supports lock sharing in the stack of vnodes 1118 */ 1119 vp->v_vnlock = &ip->i_lock; 1120 ip->i_vnode = vp; 1121 ip->i_fs = fs = ump->um_fs; 1122 ip->i_dev = dev; 1123 ip->i_number = ino; 1124 #ifdef QUOTA 1125 { 1126 int i; 1127 for (i = 0; i < MAXQUOTAS; i++) 1128 ip->i_dquot[i] = NODQUOT; 1129 } 1130 #endif 1131 /* 1132 * Put it onto its hash chain and lock it so that other requests for 1133 * this inode will block if they arrive while we are sleeping waiting 1134 * for old data structures to be purged or for the contents of the 1135 * disk portion of this inode to be read. 1136 */ 1137 ufs_ihashins(ip); 1138 1139 if (ffs_inode_hash_lock < 0) 1140 wakeup(&ffs_inode_hash_lock); 1141 ffs_inode_hash_lock = 0; 1142 1143 /* Read in the disk contents for the inode, copy into the inode. */ 1144 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1145 (int)fs->fs_bsize, &bp); 1146 if (error) { 1147 /* 1148 * The inode does not contain anything useful, so it would 1149 * be misleading to leave it on its hash chain. With mode 1150 * still zero, it will be unlinked and returned to the free 1151 * list by vput(). 1152 */ 1153 brelse(bp); 1154 vput(vp); 1155 *vpp = NULL; 1156 return (error); 1157 } 1158 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 1159 if (DOINGSOFTDEP(vp)) 1160 softdep_load_inodeblock(ip); 1161 else 1162 ip->i_effnlink = ip->i_nlink; 1163 bqrelse(bp); 1164 1165 /* 1166 * Initialize the vnode from the inode, check for aliases. 1167 * Note that the underlying vnode may have changed. 1168 */ 1169 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1170 if (error) { 1171 vput(vp); 1172 *vpp = NULL; 1173 return (error); 1174 } 1175 /* 1176 * Finish inode initialization now that aliasing has been resolved. 1177 */ 1178 ip->i_devvp = ump->um_devvp; 1179 VREF(ip->i_devvp); 1180 /* 1181 * Set up a generation number for this inode if it does not 1182 * already have one. This should only happen on old filesystems. 1183 */ 1184 if (ip->i_gen == 0) { 1185 ip->i_gen = random() / 2 + 1; 1186 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1187 ip->i_flag |= IN_MODIFIED; 1188 } 1189 /* 1190 * Ensure that uid and gid are correct. This is a temporary 1191 * fix until fsck has been changed to do the update. 1192 */ 1193 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1194 ip->i_uid = ip->i_din.di_ouid; /* XXX */ 1195 ip->i_gid = ip->i_din.di_ogid; /* XXX */ 1196 } /* XXX */ 1197 1198 *vpp = vp; 1199 return (0); 1200 } 1201 1202 /* 1203 * File handle to vnode 1204 * 1205 * Have to be really careful about stale file handles: 1206 * - check that the inode number is valid 1207 * - call ffs_vget() to get the locked inode 1208 * - check for an unallocated inode (i_mode == 0) 1209 * - check that the given client host has export rights and return 1210 * those rights via. exflagsp and credanonp 1211 */ 1212 int 1213 ffs_fhtovp(mp, fhp, vpp) 1214 struct mount *mp; 1215 struct fid *fhp; 1216 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, ufhp, vpp)); 1227 } 1228 1229 /* 1230 * Vnode pointer to File handle 1231 */ 1232 /* ARGSUSED */ 1233 int 1234 ffs_vptofh(vp, fhp) 1235 struct vnode *vp; 1236 struct fid *fhp; 1237 { 1238 struct inode *ip; 1239 struct ufid *ufhp; 1240 1241 ip = VTOI(vp); 1242 ufhp = (struct ufid *)fhp; 1243 ufhp->ufid_len = sizeof(struct ufid); 1244 ufhp->ufid_ino = ip->i_number; 1245 ufhp->ufid_gen = ip->i_gen; 1246 return (0); 1247 } 1248 1249 /* 1250 * Initialize the filesystem; just use ufs_init. 1251 */ 1252 static int 1253 ffs_init(vfsp) 1254 struct vfsconf *vfsp; 1255 { 1256 1257 softdep_initialize(); 1258 return (ufs_init(vfsp)); 1259 } 1260 1261 /* 1262 * Write a superblock and associated information back to disk. 1263 */ 1264 static int 1265 ffs_sbupdate(mp, waitfor) 1266 struct ufsmount *mp; 1267 int waitfor; 1268 { 1269 struct fs *dfs, *fs = mp->um_fs; 1270 struct buf *bp; 1271 int blks; 1272 void *space; 1273 int i, size, error, allerror = 0; 1274 1275 /* 1276 * First write back the summary information. 1277 */ 1278 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1279 space = fs->fs_csp; 1280 for (i = 0; i < blks; i += fs->fs_frag) { 1281 size = fs->fs_bsize; 1282 if (i + fs->fs_frag > blks) 1283 size = (blks - i) * fs->fs_fsize; 1284 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1285 size, 0, 0); 1286 bcopy(space, bp->b_data, (u_int)size); 1287 space = (char *)space + size; 1288 if (waitfor != MNT_WAIT) 1289 bawrite(bp); 1290 else if ((error = bwrite(bp)) != 0) 1291 allerror = error; 1292 } 1293 /* 1294 * Now write back the superblock itself. If any errors occurred 1295 * up to this point, then fail so that the superblock avoids 1296 * being written out as clean. 1297 */ 1298 if (allerror) 1299 return (allerror); 1300 bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0); 1301 fs->fs_fmod = 0; 1302 fs->fs_time = time_second; 1303 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1304 /* Restore compatibility to old file systems. XXX */ 1305 dfs = (struct fs *)bp->b_data; /* XXX */ 1306 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 1307 dfs->fs_nrpos = -1; /* XXX */ 1308 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1309 int32_t *lp, tmp; /* XXX */ 1310 /* XXX */ 1311 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ 1312 tmp = lp[4]; /* XXX */ 1313 for (i = 4; i > 0; i--) /* XXX */ 1314 lp[i] = lp[i-1]; /* XXX */ 1315 lp[0] = tmp; /* XXX */ 1316 } /* XXX */ 1317 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ 1318 if (waitfor != MNT_WAIT) 1319 bawrite(bp); 1320 else if ((error = bwrite(bp)) != 0) 1321 allerror = error; 1322 return (allerror); 1323 } 1324