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 1.15 2004/03/11 20:17:36 hmp 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 (struct ufsmount *, int); 68 static int ffs_reload (struct mount *,struct ucred *,struct thread *); 69 static int ffs_oldfscompat (struct fs *); 70 static int ffs_mount (struct mount *, char *, caddr_t, 71 struct nameidata *, struct thread *); 72 static int ffs_init (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, NULL, LK_EXCLUSIVE | LK_RETRY, td); 228 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 229 cred, td)) != 0) { 230 VOP_UNLOCK(devvp, NULL, 0, td); 231 return (error); 232 } 233 VOP_UNLOCK(devvp, NULL, 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, NAMEI_LOOKUP, CNP_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, NULL, 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, NULL, 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 */ 422 423 static int ffs_reload_scan1(struct mount *mp, struct vnode *vp, void *data); 424 static int ffs_reload_scan2(struct mount *mp, struct vnode *vp, 425 lwkt_tokref_t vlock, void *data); 426 427 struct scaninfo { 428 int rescan; 429 struct fs *fs; 430 struct vnode *devvp; 431 thread_t td; 432 int waitfor; 433 int allerror; 434 }; 435 436 static int 437 ffs_reload(struct mount *mp, struct ucred *cred, struct thread *td) 438 { 439 struct vnode *devvp; 440 void *space; 441 struct buf *bp; 442 struct fs *fs, *newfs; 443 struct partinfo dpart; 444 dev_t dev; 445 int i, blks, size, error; 446 lwkt_tokref vlock; 447 struct scaninfo scaninfo; 448 int32_t *lp; 449 450 if ((mp->mnt_flag & MNT_RDONLY) == 0) 451 return (EINVAL); 452 /* 453 * Step 1: invalidate all cached meta-data. 454 */ 455 devvp = VFSTOUFS(mp)->um_devvp; 456 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 457 error = vinvalbuf(devvp, 0, td, 0, 0); 458 VOP_UNLOCK(devvp, NULL, 0, td); 459 if (error) 460 panic("ffs_reload: dirty1"); 461 462 dev = devvp->v_rdev; 463 464 /* 465 * Only VMIO the backing device if the backing device is a real 466 * block device. See ffs_mountmfs() for more details. 467 */ 468 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 469 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 470 vfs_object_create(devvp, td); 471 lwkt_gettoken(&vlock, devvp->v_interlock); 472 VOP_UNLOCK(devvp, &vlock, LK_INTERLOCK, td); 473 } 474 475 /* 476 * Step 2: re-read superblock from disk. 477 */ 478 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0) 479 size = DEV_BSIZE; 480 else 481 size = dpart.disklab->d_secsize; 482 if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, &bp)) != 0) 483 return (error); 484 newfs = (struct fs *)bp->b_data; 485 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || 486 newfs->fs_bsize < sizeof(struct fs)) { 487 brelse(bp); 488 return (EIO); /* XXX needs translation */ 489 } 490 fs = VFSTOUFS(mp)->um_fs; 491 /* 492 * Copy pointer fields back into superblock before copying in XXX 493 * new superblock. These should really be in the ufsmount. XXX 494 * Note that important parameters (eg fs_ncg) are unchanged. 495 */ 496 newfs->fs_csp = fs->fs_csp; 497 newfs->fs_maxcluster = fs->fs_maxcluster; 498 newfs->fs_contigdirs = fs->fs_contigdirs; 499 /* The file system is still read-only. */ 500 newfs->fs_ronly = 1; 501 bcopy(newfs, fs, (u_int)fs->fs_sbsize); 502 if (fs->fs_sbsize < SBSIZE) 503 bp->b_flags |= B_INVAL; 504 brelse(bp); 505 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 506 ffs_oldfscompat(fs); 507 /* An old fsck may have zeroed these fields, so recheck them. */ 508 if (fs->fs_avgfilesize <= 0) /* XXX */ 509 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 510 if (fs->fs_avgfpdir <= 0) /* XXX */ 511 fs->fs_avgfpdir = AFPDIR; /* XXX */ 512 513 /* 514 * Step 3: re-read summary information from disk. 515 */ 516 blks = howmany(fs->fs_cssize, fs->fs_fsize); 517 space = fs->fs_csp; 518 for (i = 0; i < blks; i += fs->fs_frag) { 519 size = fs->fs_bsize; 520 if (i + fs->fs_frag > blks) 521 size = (blks - i) * fs->fs_fsize; 522 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, &bp); 523 if (error) 524 return (error); 525 bcopy(bp->b_data, space, (u_int)size); 526 space = (char *)space + size; 527 brelse(bp); 528 } 529 /* 530 * We no longer know anything about clusters per cylinder group. 531 */ 532 if (fs->fs_contigsumsize > 0) { 533 lp = fs->fs_maxcluster; 534 for (i = 0; i < fs->fs_ncg; i++) 535 *lp++ = fs->fs_contigsumsize; 536 } 537 538 scaninfo.rescan = 0; 539 scaninfo.fs = fs; 540 scaninfo.devvp = devvp; 541 scaninfo.td = td; 542 while (error == 0 && scaninfo.rescan) { 543 scaninfo.rescan = 0; 544 error = vmntvnodescan(mp, ffs_reload_scan1, 545 ffs_reload_scan2, &scaninfo); 546 } 547 return(error); 548 } 549 550 static 551 int 552 ffs_reload_scan1(struct mount *mp, struct vnode *vp, void *data) 553 { 554 struct scaninfo *info = data; 555 556 /* 557 * Step 4: invalidate all inactive vnodes. 558 */ 559 if (vrecycle(vp, NULL, info->td)) { 560 info->rescan = 1; 561 return(-1); /* continue loop, do not call scan2 */ 562 } 563 return(0); 564 } 565 566 static 567 int 568 ffs_reload_scan2(struct mount *mp, struct vnode *vp, lwkt_tokref_t vlock, void *data) 569 { 570 struct scaninfo *info = data; 571 struct inode *ip; 572 struct buf *bp; 573 int error; 574 575 /* 576 * Step 5: invalidate all cached file data. 577 */ 578 if (vget(vp, vlock, LK_EXCLUSIVE | LK_INTERLOCK, info->td)) { 579 info->rescan = 1; 580 return(0); 581 } 582 if (vinvalbuf(vp, 0, info->td, 0, 0)) 583 panic("ffs_reload: dirty2"); 584 /* 585 * Step 6: re-read inode data for all active vnodes. 586 */ 587 ip = VTOI(vp); 588 error = bread(info->devvp, 589 fsbtodb(info->fs, ino_to_fsba(info->fs, ip->i_number)), 590 (int)info->fs->fs_bsize, &bp); 591 if (error) { 592 vput(vp); 593 return (error); 594 } 595 ip->i_din = *((struct dinode *)bp->b_data + 596 ino_to_fsbo(info->fs, ip->i_number)); 597 ip->i_effnlink = ip->i_nlink; 598 brelse(bp); 599 vput(vp); 600 return(0); 601 } 602 603 /* 604 * Common code for mount and mountroot 605 */ 606 int 607 ffs_mountfs(devvp, mp, td, malloctype) 608 struct vnode *devvp; 609 struct mount *mp; 610 struct thread *td; 611 struct malloc_type *malloctype; 612 { 613 struct ufsmount *ump; 614 struct buf *bp; 615 struct fs *fs; 616 dev_t dev; 617 struct partinfo dpart; 618 void *space; 619 int error, i, blks, size, ronly; 620 lwkt_tokref vlock; 621 int32_t *lp; 622 u_int64_t maxfilesize; /* XXX */ 623 size_t strsize; 624 int ncount; 625 626 dev = devvp->v_rdev; 627 /* 628 * Disallow multiple mounts of the same device. 629 * Disallow mounting of a device that is currently in use 630 * (except for root, which might share swap device for miniroot). 631 * Flush out any old buffers remaining from a previous use. 632 */ 633 error = vfs_mountedon(devvp); 634 if (error) 635 return (error); 636 ncount = vcount(devvp); 637 638 if (ncount > 1 && devvp != rootvp) 639 return (EBUSY); 640 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 641 error = vinvalbuf(devvp, V_SAVE, td, 0, 0); 642 VOP_UNLOCK(devvp, NULL, 0, td); 643 if (error) 644 return (error); 645 646 /* 647 * Only VMIO the backing device if the backing device is a real 648 * block device. This excludes the original MFS implementation. 649 * Note that it is optional that the backing device be VMIOed. This 650 * increases the opportunity for metadata caching. 651 */ 652 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 653 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 654 vfs_object_create(devvp, td); 655 lwkt_gettoken(&vlock, devvp->v_interlock); 656 VOP_UNLOCK(devvp, &vlock, LK_INTERLOCK, td); 657 } 658 659 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 660 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 661 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); 662 VOP_UNLOCK(devvp, NULL, 0, td); 663 if (error) 664 return (error); 665 if (devvp->v_rdev->si_iosize_max != 0) 666 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 667 if (mp->mnt_iosize_max > MAXPHYS) 668 mp->mnt_iosize_max = MAXPHYS; 669 670 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, proc0.p_ucred, td) != 0) 671 size = DEV_BSIZE; 672 else 673 size = dpart.disklab->d_secsize; 674 675 bp = NULL; 676 ump = NULL; 677 if ((error = bread(devvp, SBLOCK, SBSIZE, &bp)) != 0) 678 goto out; 679 fs = (struct fs *)bp->b_data; 680 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 681 fs->fs_bsize < sizeof(struct fs)) { 682 error = EINVAL; /* XXX needs translation */ 683 goto out; 684 } 685 fs->fs_fmod = 0; 686 fs->fs_flags &= ~FS_UNCLEAN; 687 if (fs->fs_clean == 0) { 688 fs->fs_flags |= FS_UNCLEAN; 689 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 690 printf( 691 "WARNING: %s was not properly dismounted\n", 692 fs->fs_fsmnt); 693 } else { 694 printf( 695 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 696 fs->fs_fsmnt); 697 error = EPERM; 698 goto out; 699 } 700 } 701 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ 702 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { 703 error = EROFS; /* needs translation */ 704 goto out; 705 } 706 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 707 bzero((caddr_t)ump, sizeof *ump); 708 ump->um_malloctype = malloctype; 709 ump->um_i_effnlink_valid = 1; 710 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 711 M_WAITOK); 712 ump->um_blkatoff = ffs_blkatoff; 713 ump->um_truncate = ffs_truncate; 714 ump->um_update = ffs_update; 715 ump->um_valloc = ffs_valloc; 716 ump->um_vfree = ffs_vfree; 717 bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); 718 if (fs->fs_sbsize < SBSIZE) 719 bp->b_flags |= B_INVAL; 720 brelse(bp); 721 bp = NULL; 722 fs = ump->um_fs; 723 fs->fs_ronly = ronly; 724 size = fs->fs_cssize; 725 blks = howmany(size, fs->fs_fsize); 726 if (fs->fs_contigsumsize > 0) 727 size += fs->fs_ncg * sizeof(int32_t); 728 size += fs->fs_ncg * sizeof(u_int8_t); 729 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 730 fs->fs_csp = space; 731 for (i = 0; i < blks; i += fs->fs_frag) { 732 size = fs->fs_bsize; 733 if (i + fs->fs_frag > blks) 734 size = (blks - i) * fs->fs_fsize; 735 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 736 &bp)) != 0) { 737 free(fs->fs_csp, M_UFSMNT); 738 goto out; 739 } 740 bcopy(bp->b_data, space, (u_int)size); 741 space = (char *)space + size; 742 brelse(bp); 743 bp = NULL; 744 } 745 if (fs->fs_contigsumsize > 0) { 746 fs->fs_maxcluster = lp = space; 747 for (i = 0; i < fs->fs_ncg; i++) 748 *lp++ = fs->fs_contigsumsize; 749 space = lp; 750 } 751 size = fs->fs_ncg * sizeof(u_int8_t); 752 fs->fs_contigdirs = (u_int8_t *)space; 753 bzero(fs->fs_contigdirs, size); 754 /* Compatibility for old filesystems XXX */ 755 if (fs->fs_avgfilesize <= 0) /* XXX */ 756 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 757 if (fs->fs_avgfpdir <= 0) /* XXX */ 758 fs->fs_avgfpdir = AFPDIR; /* XXX */ 759 mp->mnt_data = (qaddr_t)ump; 760 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 761 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 762 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 763 vfs_getvfs(&mp->mnt_stat.f_fsid)) 764 vfs_getnewfsid(mp); 765 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 766 mp->mnt_flag |= MNT_LOCAL; 767 ump->um_mountp = mp; 768 ump->um_dev = dev; 769 ump->um_devvp = devvp; 770 ump->um_nindir = fs->fs_nindir; 771 ump->um_bptrtodb = fs->fs_fsbtodb; 772 ump->um_seqinc = fs->fs_frag; 773 for (i = 0; i < MAXQUOTAS; i++) 774 ump->um_quotas[i] = NULLVP; 775 devvp->v_specmountpoint = mp; 776 ffs_oldfscompat(fs); 777 778 /* 779 * Set FS local "last mounted on" information (NULL pad) 780 */ 781 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 782 fs->fs_fsmnt, /* copy area*/ 783 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 784 &strsize); /* real size*/ 785 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 786 787 if( mp->mnt_flag & MNT_ROOTFS) { 788 /* 789 * Root mount; update timestamp in mount structure. 790 * this will be used by the common root mount code 791 * to update the system clock. 792 */ 793 mp->mnt_time = fs->fs_time; 794 } 795 796 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ 797 maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ 798 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */ 799 if (maxfilesize > (u_int64_t)0x80000000u * PAGE_SIZE - 1) 800 maxfilesize = (u_int64_t)0x80000000u * PAGE_SIZE - 1; 801 if (fs->fs_maxfilesize > maxfilesize) /* XXX */ 802 fs->fs_maxfilesize = maxfilesize; /* XXX */ 803 if (ronly == 0) { 804 if ((fs->fs_flags & FS_DOSOFTDEP) && 805 (error = softdep_mount(devvp, mp, fs)) != 0) { 806 free(fs->fs_csp, M_UFSMNT); 807 goto out; 808 } 809 fs->fs_fmod = 1; 810 fs->fs_clean = 0; 811 (void) ffs_sbupdate(ump, MNT_WAIT); 812 } 813 return (0); 814 out: 815 devvp->v_specmountpoint = NULL; 816 if (bp) 817 brelse(bp); 818 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td); 819 if (ump) { 820 free(ump->um_fs, M_UFSMNT); 821 free(ump, M_UFSMNT); 822 mp->mnt_data = (qaddr_t)0; 823 } 824 return (error); 825 } 826 827 /* 828 * Sanity checks for old file systems. 829 * 830 * XXX - goes away some day. 831 */ 832 static int 833 ffs_oldfscompat(fs) 834 struct fs *fs; 835 { 836 837 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ 838 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ 839 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 840 fs->fs_nrpos = 8; /* XXX */ 841 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 842 #if 0 843 int i; /* XXX */ 844 u_int64_t sizepb = fs->fs_bsize; /* XXX */ 845 /* XXX */ 846 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ 847 for (i = 0; i < NIADDR; i++) { /* XXX */ 848 sizepb *= NINDIR(fs); /* XXX */ 849 fs->fs_maxfilesize += sizepb; /* XXX */ 850 } /* XXX */ 851 #endif 852 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 853 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ 854 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ 855 } /* XXX */ 856 return (0); 857 } 858 859 /* 860 * unmount system call 861 */ 862 int 863 ffs_unmount(struct mount *mp, int mntflags, struct thread *td) 864 { 865 struct ufsmount *ump; 866 struct fs *fs; 867 int error, flags; 868 869 flags = 0; 870 if (mntflags & MNT_FORCE) { 871 flags |= FORCECLOSE; 872 } 873 if (mp->mnt_flag & MNT_SOFTDEP) { 874 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 875 return (error); 876 } else { 877 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 878 return (error); 879 } 880 ump = VFSTOUFS(mp); 881 fs = ump->um_fs; 882 if (fs->fs_ronly == 0) { 883 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1; 884 error = ffs_sbupdate(ump, MNT_WAIT); 885 if (error) { 886 fs->fs_clean = 0; 887 return (error); 888 } 889 } 890 ump->um_devvp->v_specmountpoint = NULL; 891 892 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 893 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, td); 894 895 vrele(ump->um_devvp); 896 897 free(fs->fs_csp, M_UFSMNT); 898 free(fs, M_UFSMNT); 899 free(ump, M_UFSMNT); 900 mp->mnt_data = (qaddr_t)0; 901 mp->mnt_flag &= ~MNT_LOCAL; 902 return (error); 903 } 904 905 /* 906 * Flush out all the files in a filesystem. 907 */ 908 int 909 ffs_flushfiles(struct mount *mp, int flags, struct thread *td) 910 { 911 struct ufsmount *ump; 912 int error; 913 914 ump = VFSTOUFS(mp); 915 #ifdef QUOTA 916 if (mp->mnt_flag & MNT_QUOTA) { 917 int i; 918 error = vflush(mp, 0, SKIPSYSTEM|flags); 919 if (error) 920 return (error); 921 for (i = 0; i < MAXQUOTAS; i++) { 922 if (ump->um_quotas[i] == NULLVP) 923 continue; 924 quotaoff(td, mp, i); 925 } 926 /* 927 * Here we fall through to vflush again to ensure 928 * that we have gotten rid of all the system vnodes. 929 */ 930 } 931 #endif 932 /* 933 * Flush all the files. 934 */ 935 if ((error = vflush(mp, 0, flags)) != 0) 936 return (error); 937 /* 938 * Flush filesystem metadata. 939 */ 940 vn_lock(ump->um_devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 941 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 942 VOP_UNLOCK(ump->um_devvp, NULL, 0, td); 943 return (error); 944 } 945 946 /* 947 * Get file system statistics. 948 */ 949 int 950 ffs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 951 { 952 struct ufsmount *ump; 953 struct fs *fs; 954 955 ump = VFSTOUFS(mp); 956 fs = ump->um_fs; 957 if (fs->fs_magic != FS_MAGIC) 958 panic("ffs_statfs"); 959 sbp->f_bsize = fs->fs_fsize; 960 sbp->f_iosize = fs->fs_bsize; 961 sbp->f_blocks = fs->fs_dsize; 962 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 963 fs->fs_cstotal.cs_nffree; 964 sbp->f_bavail = freespace(fs, fs->fs_minfree); 965 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 966 sbp->f_ffree = fs->fs_cstotal.cs_nifree; 967 if (sbp != &mp->mnt_stat) { 968 sbp->f_type = mp->mnt_vfc->vfc_typenum; 969 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 970 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 971 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 972 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 973 } 974 return (0); 975 } 976 977 /* 978 * Go through the disk queues to initiate sandbagged IO; 979 * go through the inodes to write those that have been modified; 980 * initiate the writing of the super block if it has been modified. 981 * 982 * Note: we are always called with the filesystem marked `MPBUSY'. 983 */ 984 985 986 static int ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 987 static int ffs_sync_scan2(struct mount *mp, struct vnode *vp, 988 lwkt_tokref_t vlock, void *data); 989 990 int 991 ffs_sync(struct mount *mp, int waitfor, struct thread *td) 992 { 993 struct ufsmount *ump = VFSTOUFS(mp); 994 struct fs *fs; 995 int error; 996 struct scaninfo scaninfo; 997 998 fs = ump->um_fs; 999 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1000 printf("fs = %s\n", fs->fs_fsmnt); 1001 panic("ffs_sync: rofs mod"); 1002 } 1003 1004 /* 1005 * Write back each (modified) inode. 1006 */ 1007 scaninfo.allerror = 0; 1008 scaninfo.rescan = 1; 1009 scaninfo.waitfor = waitfor; 1010 while (scaninfo.rescan) { 1011 scaninfo.rescan = 0; 1012 vmntvnodescan(mp, ffs_sync_scan1, ffs_sync_scan2, &scaninfo); 1013 } 1014 1015 /* 1016 * Force stale file system control information to be flushed. 1017 */ 1018 if (waitfor != MNT_LAZY) { 1019 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP) 1020 waitfor = MNT_NOWAIT; 1021 vn_lock(ump->um_devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 1022 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0) 1023 scaninfo.allerror = error; 1024 VOP_UNLOCK(ump->um_devvp, NULL, 0, td); 1025 } 1026 #ifdef QUOTA 1027 qsync(mp); 1028 #endif 1029 /* 1030 * Write back modified superblock. 1031 */ 1032 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1033 scaninfo.allerror = error; 1034 return (scaninfo.allerror); 1035 } 1036 1037 static 1038 int 1039 ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 1040 { 1041 struct inode *ip; 1042 1043 /* 1044 * Depend on the mount list's vnode lock to keep things stable 1045 * enough for a quick test. Since there might be hundreds of 1046 * thousands of vnodes, we cannot afford even a subroutine 1047 * call unless there's a good chance that we have work to do. 1048 */ 1049 ip = VTOI(vp); 1050 if (vp->v_type == VNON || ((ip->i_flag & 1051 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1052 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1053 return(-1); 1054 } 1055 return(0); 1056 } 1057 1058 static 1059 int 1060 ffs_sync_scan2(struct mount *mp, struct vnode *vp, 1061 lwkt_tokref_t vlock, void *data) 1062 { 1063 struct scaninfo *info = data; 1064 thread_t td = curthread; /* XXX */ 1065 struct inode *ip; 1066 int error; 1067 1068 /* 1069 * We have to recheck after having obtained the vnode interlock. 1070 */ 1071 ip = VTOI(vp); 1072 if (vp->v_type == VNON || ((ip->i_flag & 1073 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1074 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1075 lwkt_reltoken(vlock); 1076 return(0); 1077 } 1078 if (vp->v_type != VCHR) { 1079 error = vget(vp, vlock, LK_INTERLOCK|LK_EXCLUSIVE|LK_NOWAIT, td); 1080 if (error) { 1081 if (error == ENOENT) 1082 info->rescan = 1; 1083 } else { 1084 if ((error = VOP_FSYNC(vp, info->waitfor, td)) != 0) 1085 info->allerror = error; 1086 VOP_UNLOCK(vp, NULL, 0, td); 1087 vrele(vp); 1088 } 1089 } else { 1090 /* 1091 * We must reference the vp to prevent it from 1092 * getting ripped out from under UFS_UPDATE, since 1093 * we are not holding a vnode lock. 1094 */ 1095 VREF(vp); 1096 lwkt_reltoken(vlock); 1097 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */ 1098 UFS_UPDATE(vp, 0); 1099 vrele(vp); 1100 } 1101 return(0); 1102 } 1103 1104 /* 1105 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1106 * in from disk. If it is in core, wait for the lock bit to clear, then 1107 * return the inode locked. Detection and handling of mount points must be 1108 * done by the calling routine. 1109 */ 1110 static int ffs_inode_hash_lock; 1111 1112 int 1113 ffs_vget(mp, ino, vpp) 1114 struct mount *mp; 1115 ino_t ino; 1116 struct vnode **vpp; 1117 { 1118 struct fs *fs; 1119 struct inode *ip; 1120 struct ufsmount *ump; 1121 struct buf *bp; 1122 struct vnode *vp; 1123 dev_t dev; 1124 int error; 1125 1126 ump = VFSTOUFS(mp); 1127 dev = ump->um_dev; 1128 restart: 1129 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) { 1130 return (0); 1131 } 1132 1133 /* 1134 * Lock out the creation of new entries in the FFS hash table in 1135 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 1136 * may occur! 1137 */ 1138 if (ffs_inode_hash_lock) { 1139 while (ffs_inode_hash_lock) { 1140 ffs_inode_hash_lock = -1; 1141 tsleep(&ffs_inode_hash_lock, 0, "ffsvgt", 0); 1142 } 1143 goto restart; 1144 } 1145 ffs_inode_hash_lock = 1; 1146 1147 /* 1148 * If this MALLOC() is performed after the getnewvnode() 1149 * it might block, leaving a vnode with a NULL v_data to be 1150 * found by ffs_sync() if a sync happens to fire right then, 1151 * which will cause a panic because ffs_sync() blindly 1152 * dereferences vp->v_data (as well it should). 1153 */ 1154 MALLOC(ip, struct inode *, sizeof(struct inode), 1155 ump->um_malloctype, M_WAITOK); 1156 1157 /* Allocate a new vnode/inode. */ 1158 error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp); 1159 if (error) { 1160 if (ffs_inode_hash_lock < 0) 1161 wakeup(&ffs_inode_hash_lock); 1162 ffs_inode_hash_lock = 0; 1163 *vpp = NULL; 1164 FREE(ip, ump->um_malloctype); 1165 return (error); 1166 } 1167 bzero((caddr_t)ip, sizeof(struct inode)); 1168 lockinit(&ip->i_lock, 0, "inode", VLKTIMEOUT, LK_CANRECURSE); 1169 vp->v_data = ip; 1170 /* 1171 * FFS supports lock sharing in the stack of vnodes 1172 */ 1173 vp->v_vnlock = &ip->i_lock; 1174 ip->i_vnode = vp; 1175 ip->i_fs = fs = ump->um_fs; 1176 ip->i_dev = dev; 1177 ip->i_number = ino; 1178 #ifdef QUOTA 1179 { 1180 int i; 1181 for (i = 0; i < MAXQUOTAS; i++) 1182 ip->i_dquot[i] = NODQUOT; 1183 } 1184 #endif 1185 /* 1186 * Put it onto its hash chain and lock it so that other requests for 1187 * this inode will block if they arrive while we are sleeping waiting 1188 * for old data structures to be purged or for the contents of the 1189 * disk portion of this inode to be read. 1190 */ 1191 ufs_ihashins(ip); 1192 1193 if (ffs_inode_hash_lock < 0) 1194 wakeup(&ffs_inode_hash_lock); 1195 ffs_inode_hash_lock = 0; 1196 1197 /* Read in the disk contents for the inode, copy into the inode. */ 1198 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1199 (int)fs->fs_bsize, &bp); 1200 if (error) { 1201 /* 1202 * The inode does not contain anything useful, so it would 1203 * be misleading to leave it on its hash chain. With mode 1204 * still zero, it will be unlinked and returned to the free 1205 * list by vput(). 1206 */ 1207 brelse(bp); 1208 vput(vp); 1209 *vpp = NULL; 1210 return (error); 1211 } 1212 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 1213 if (DOINGSOFTDEP(vp)) 1214 softdep_load_inodeblock(ip); 1215 else 1216 ip->i_effnlink = ip->i_nlink; 1217 bqrelse(bp); 1218 1219 /* 1220 * Initialize the vnode from the inode, check for aliases. 1221 * Note that the underlying vnode may have changed. 1222 */ 1223 error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1224 if (error) { 1225 vput(vp); 1226 *vpp = NULL; 1227 return (error); 1228 } 1229 /* 1230 * Finish inode initialization now that aliasing has been resolved. 1231 */ 1232 ip->i_devvp = ump->um_devvp; 1233 VREF(ip->i_devvp); 1234 /* 1235 * Set up a generation number for this inode if it does not 1236 * already have one. This should only happen on old filesystems. 1237 */ 1238 if (ip->i_gen == 0) { 1239 ip->i_gen = random() / 2 + 1; 1240 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1241 ip->i_flag |= IN_MODIFIED; 1242 } 1243 /* 1244 * Ensure that uid and gid are correct. This is a temporary 1245 * fix until fsck has been changed to do the update. 1246 */ 1247 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1248 ip->i_uid = ip->i_din.di_ouid; /* XXX */ 1249 ip->i_gid = ip->i_din.di_ogid; /* XXX */ 1250 } /* XXX */ 1251 1252 *vpp = vp; 1253 return (0); 1254 } 1255 1256 /* 1257 * File handle to vnode 1258 * 1259 * Have to be really careful about stale file handles: 1260 * - check that the inode number is valid 1261 * - call ffs_vget() to get the locked inode 1262 * - check for an unallocated inode (i_mode == 0) 1263 * - check that the given client host has export rights and return 1264 * those rights via. exflagsp and credanonp 1265 */ 1266 int 1267 ffs_fhtovp(mp, fhp, vpp) 1268 struct mount *mp; 1269 struct fid *fhp; 1270 struct vnode **vpp; 1271 { 1272 struct ufid *ufhp; 1273 struct fs *fs; 1274 1275 ufhp = (struct ufid *)fhp; 1276 fs = VFSTOUFS(mp)->um_fs; 1277 if (ufhp->ufid_ino < ROOTINO || 1278 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1279 return (ESTALE); 1280 return (ufs_fhtovp(mp, ufhp, vpp)); 1281 } 1282 1283 /* 1284 * Vnode pointer to File handle 1285 */ 1286 /* ARGSUSED */ 1287 int 1288 ffs_vptofh(vp, fhp) 1289 struct vnode *vp; 1290 struct fid *fhp; 1291 { 1292 struct inode *ip; 1293 struct ufid *ufhp; 1294 1295 ip = VTOI(vp); 1296 ufhp = (struct ufid *)fhp; 1297 ufhp->ufid_len = sizeof(struct ufid); 1298 ufhp->ufid_ino = ip->i_number; 1299 ufhp->ufid_gen = ip->i_gen; 1300 return (0); 1301 } 1302 1303 /* 1304 * Initialize the filesystem; just use ufs_init. 1305 */ 1306 static int 1307 ffs_init(vfsp) 1308 struct vfsconf *vfsp; 1309 { 1310 1311 softdep_initialize(); 1312 return (ufs_init(vfsp)); 1313 } 1314 1315 /* 1316 * Write a superblock and associated information back to disk. 1317 */ 1318 static int 1319 ffs_sbupdate(mp, waitfor) 1320 struct ufsmount *mp; 1321 int waitfor; 1322 { 1323 struct fs *dfs, *fs = mp->um_fs; 1324 struct buf *bp; 1325 int blks; 1326 void *space; 1327 int i, size, error, allerror = 0; 1328 1329 /* 1330 * First write back the summary information. 1331 */ 1332 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1333 space = fs->fs_csp; 1334 for (i = 0; i < blks; i += fs->fs_frag) { 1335 size = fs->fs_bsize; 1336 if (i + fs->fs_frag > blks) 1337 size = (blks - i) * fs->fs_fsize; 1338 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1339 size, 0, 0); 1340 bcopy(space, bp->b_data, (u_int)size); 1341 space = (char *)space + size; 1342 if (waitfor != MNT_WAIT) 1343 bawrite(bp); 1344 else if ((error = bwrite(bp)) != 0) 1345 allerror = error; 1346 } 1347 /* 1348 * Now write back the superblock itself. If any errors occurred 1349 * up to this point, then fail so that the superblock avoids 1350 * being written out as clean. 1351 */ 1352 if (allerror) 1353 return (allerror); 1354 bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0); 1355 fs->fs_fmod = 0; 1356 fs->fs_time = time_second; 1357 bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); 1358 /* Restore compatibility to old file systems. XXX */ 1359 dfs = (struct fs *)bp->b_data; /* XXX */ 1360 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 1361 dfs->fs_nrpos = -1; /* XXX */ 1362 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1363 int32_t *lp, tmp; /* XXX */ 1364 /* XXX */ 1365 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ 1366 tmp = lp[4]; /* XXX */ 1367 for (i = 4; i > 0; i--) /* XXX */ 1368 lp[i] = lp[i-1]; /* XXX */ 1369 lp[0] = tmp; /* XXX */ 1370 } /* XXX */ 1371 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ 1372 if (waitfor != MNT_WAIT) 1373 bawrite(bp); 1374 else if ((error = bwrite(bp)) != 0) 1375 allerror = error; 1376 return (allerror); 1377 } 1378