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 1.22 2004/08/19 14:42:46 drhodus 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 extern struct vnodeopv_entry_desc ffs_vnodeop_entries[]; 94 extern struct vnodeopv_entry_desc ffs_specop_entries[]; 95 extern struct vnodeopv_entry_desc ffs_fifoop_entries[]; 96 97 98 /* 99 * ffs_mount 100 * 101 * Called when mounting local physical media 102 * 103 * PARAMETERS: 104 * mountroot 105 * mp mount point structure 106 * path NULL (flag for root mount!!!) 107 * data <unused> 108 * ndp <unused> 109 * p process (user credentials check [statfs]) 110 * 111 * mount 112 * mp mount point structure 113 * path path to mount point 114 * data pointer to argument struct in user space 115 * ndp mount point namei() return (used for 116 * credentials on reload), reused to look 117 * up block device. 118 * p process (user credentials check) 119 * 120 * RETURNS: 0 Success 121 * !0 error number (errno.h) 122 * 123 * LOCK STATE: 124 * 125 * ENTRY 126 * mount point is locked 127 * EXIT 128 * mount point is locked 129 * 130 * NOTES: 131 * A NULL path can be used for a flag since the mount 132 * system call will fail with EFAULT in copyinstr in 133 * namei() if it is a genuine NULL from the user. 134 */ 135 static int 136 ffs_mount(struct mount *mp, /* mount struct pointer */ 137 char *path, /* path to mount point */ 138 caddr_t data, /* arguments to FS specific mount */ 139 struct nameidata *ndp, /* mount point credentials */ 140 struct thread *td) /* process requesting mount */ 141 { 142 size_t size; 143 int err = 0; 144 struct vnode *devvp; 145 146 struct ufs_args args; 147 struct ufsmount *ump = 0; 148 struct fs *fs; 149 int error, flags, ronly = 0; 150 mode_t accessmode; 151 struct ucred *cred; 152 153 KKASSERT(td->td_proc); 154 cred = td->td_proc->p_ucred; 155 156 /* 157 * Use NULL path to flag a root mount 158 */ 159 if( path == NULL) { 160 /* 161 *** 162 * Mounting root filesystem 163 *** 164 */ 165 166 if ((err = bdevvp(rootdev, &rootvp))) { 167 printf("ffs_mountroot: can't find rootvp\n"); 168 return (err); 169 } 170 171 if( ( err = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) { 172 /* fs specific cleanup (if any)*/ 173 goto error_1; 174 } 175 176 goto dostatfs; /* success*/ 177 178 } 179 180 /* 181 *** 182 * Mounting non-root filesystem or updating a filesystem 183 *** 184 */ 185 186 /* copy in user arguments*/ 187 err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)); 188 if (err) 189 goto error_1; /* can't get arguments*/ 190 191 /* 192 * If updating, check whether changing from read-only to 193 * read/write; if there is no device name, that's all we do. 194 */ 195 if (mp->mnt_flag & MNT_UPDATE) { 196 ump = VFSTOUFS(mp); 197 fs = ump->um_fs; 198 devvp = ump->um_devvp; 199 err = 0; 200 ronly = fs->fs_ronly; /* MNT_RELOAD might change this */ 201 if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 202 /* 203 * Flush any dirty data. 204 */ 205 VFS_SYNC(mp, MNT_WAIT, td); 206 /* 207 * Check for and optionally get rid of files open 208 * for writing. 209 */ 210 flags = WRITECLOSE; 211 if (mp->mnt_flag & MNT_FORCE) 212 flags |= FORCECLOSE; 213 if (mp->mnt_flag & MNT_SOFTDEP) { 214 err = softdep_flushfiles(mp, flags, td); 215 } else { 216 err = ffs_flushfiles(mp, flags, td); 217 } 218 ronly = 1; 219 } 220 if (!err && (mp->mnt_flag & MNT_RELOAD)) 221 err = ffs_reload(mp, ndp->ni_cnd.cn_cred, td); 222 if (err) { 223 goto error_1; 224 } 225 if (ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 226 /* 227 * If upgrade to read-write by non-root, then verify 228 * that user has necessary permissions on the device. 229 */ 230 if (cred->cr_uid != 0) { 231 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 232 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, 233 cred, td)) != 0) { 234 VOP_UNLOCK(devvp, NULL, 0, td); 235 return (error); 236 } 237 VOP_UNLOCK(devvp, NULL, 0, td); 238 } 239 240 fs->fs_flags &= ~FS_UNCLEAN; 241 if (fs->fs_clean == 0) { 242 fs->fs_flags |= FS_UNCLEAN; 243 if (mp->mnt_flag & MNT_FORCE) { 244 printf( 245 "WARNING: %s was not properly dismounted\n", 246 fs->fs_fsmnt); 247 } else { 248 printf( 249 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 250 fs->fs_fsmnt); 251 err = EPERM; 252 goto error_1; 253 } 254 } 255 256 /* check to see if we need to start softdep */ 257 if (fs->fs_flags & FS_DOSOFTDEP) { 258 err = softdep_mount(devvp, mp, fs); 259 if (err) 260 goto error_1; 261 } 262 263 ronly = 0; 264 } 265 /* 266 * Soft updates is incompatible with "async", 267 * so if we are doing softupdates stop the user 268 * from setting the async flag in an update. 269 * Softdep_mount() clears it in an initial mount 270 * or ro->rw remount. 271 */ 272 if (mp->mnt_flag & MNT_SOFTDEP) { 273 mp->mnt_flag &= ~MNT_ASYNC; 274 } 275 /* if not updating name...*/ 276 if (args.fspec == 0) { 277 /* 278 * Process export requests. Jumping to "success" 279 * will return the vfs_export() error code. 280 */ 281 err = vfs_export(mp, &ump->um_export, &args.export); 282 goto success; 283 } 284 } 285 286 /* 287 * Not an update, or updating the name: look up the name 288 * and verify that it refers to a sensible block device. 289 */ 290 NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td); 291 err = namei(ndp); 292 if (err) { 293 /* can't get devvp!*/ 294 goto error_1; 295 } 296 297 NDFREE(ndp, NDF_ONLY_PNBUF); 298 devvp = ndp->ni_vp; 299 300 if (!vn_isdisk(devvp, &err)) 301 goto error_2; 302 303 /* 304 * If mount by non-root, then verify that user has necessary 305 * permissions on the device. 306 */ 307 if (cred->cr_uid != 0) { 308 accessmode = VREAD; 309 if ((mp->mnt_flag & MNT_RDONLY) == 0) 310 accessmode |= VWRITE; 311 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 312 if ((error = VOP_ACCESS(devvp, accessmode, cred, td)) != 0) { 313 vput(devvp); 314 return (error); 315 } 316 VOP_UNLOCK(devvp, NULL, 0, td); 317 } 318 319 if (mp->mnt_flag & MNT_UPDATE) { 320 /* 321 ******************** 322 * UPDATE 323 * If it's not the same vnode, or at least the same device 324 * then it's not correct. NOTE: devvp->v_rdev may be NULL 325 * since we haven't opened it, so we compare udev instead. 326 ******************** 327 */ 328 if (devvp != ump->um_devvp) { 329 if (devvp->v_udev == ump->um_devvp->v_udev) { 330 vrele(devvp); 331 } else { 332 printf("cannot update mount, udev does" 333 " not match %08x vs %08x\n", 334 devvp->v_udev, ump->um_devvp->v_udev); 335 err = EINVAL; /* needs translation */ 336 } 337 } else { 338 vrele(devvp); 339 } 340 /* 341 * Update device name only on success 342 */ 343 if( !err) { 344 /* Save "mounted from" info for mount point (NULL pad)*/ 345 copyinstr( args.fspec, 346 mp->mnt_stat.f_mntfromname, 347 MNAMELEN - 1, 348 &size); 349 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 350 } 351 } else { 352 /* 353 ******************** 354 * NEW MOUNT 355 ******************** 356 */ 357 358 /* 359 * Since this is a new mount, we want the names for 360 * the device and the mount point copied in. If an 361 * error occurs, the mountpoint is discarded by the 362 * upper level code. 363 */ 364 /* Save "last mounted on" info for mount point (NULL pad)*/ 365 copyinstr( path, /* mount point*/ 366 mp->mnt_stat.f_mntonname, /* save area*/ 367 MNAMELEN - 1, /* max size*/ 368 &size); /* real size*/ 369 bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 370 371 /* Save "mounted from" info for mount point (NULL pad)*/ 372 copyinstr( args.fspec, /* device name*/ 373 mp->mnt_stat.f_mntfromname, /* save area*/ 374 MNAMELEN - 1, /* max size*/ 375 &size); /* real size*/ 376 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 377 378 err = ffs_mountfs(devvp, mp, td, M_FFSNODE); 379 } 380 if (err) { 381 goto error_2; 382 } 383 384 dostatfs: 385 /* 386 * Initialize FS stat information in mount struct; uses both 387 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 388 * 389 * This code is common to root and non-root mounts 390 */ 391 (void)VFS_STATFS(mp, &mp->mnt_stat, td); 392 393 goto success; 394 395 396 error_2: /* error with devvp held*/ 397 398 /* release devvp before failing*/ 399 vrele(devvp); 400 401 error_1: /* no state to back out*/ 402 403 success: 404 if (!err && path && (mp->mnt_flag & MNT_UPDATE)) { 405 /* Update clean flag after changing read-onlyness. */ 406 fs = ump->um_fs; 407 if (ronly != fs->fs_ronly) { 408 fs->fs_ronly = ronly; 409 fs->fs_clean = ronly && 410 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0; 411 ffs_sbupdate(ump, MNT_WAIT); 412 } 413 } 414 return (err); 415 } 416 417 /* 418 * Reload all incore data for a filesystem (used after running fsck on 419 * the root filesystem and finding things to fix). The filesystem must 420 * be mounted read-only. 421 * 422 * Things to do to update the mount: 423 * 1) invalidate all cached meta-data. 424 * 2) re-read superblock from disk. 425 * 3) re-read summary information from disk. 426 * 4) invalidate all inactive vnodes. 427 * 5) invalidate all cached file data. 428 * 6) re-read inode data for all active vnodes. 429 */ 430 431 static int ffs_reload_scan1(struct mount *mp, struct vnode *vp, void *data); 432 static int ffs_reload_scan2(struct mount *mp, struct vnode *vp, 433 lwkt_tokref_t vlock, void *data); 434 435 struct scaninfo { 436 int rescan; 437 struct fs *fs; 438 struct vnode *devvp; 439 thread_t td; 440 int waitfor; 441 int allerror; 442 }; 443 444 static int 445 ffs_reload(struct mount *mp, struct ucred *cred, struct thread *td) 446 { 447 struct vnode *devvp; 448 void *space; 449 struct buf *bp; 450 struct fs *fs, *newfs; 451 struct partinfo dpart; 452 dev_t dev; 453 int i, blks, size, error; 454 lwkt_tokref vlock; 455 struct scaninfo scaninfo; 456 int32_t *lp; 457 458 if ((mp->mnt_flag & MNT_RDONLY) == 0) 459 return (EINVAL); 460 /* 461 * Step 1: invalidate all cached meta-data. 462 */ 463 devvp = VFSTOUFS(mp)->um_devvp; 464 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 465 error = vinvalbuf(devvp, 0, td, 0, 0); 466 VOP_UNLOCK(devvp, NULL, 0, td); 467 if (error) 468 panic("ffs_reload: dirty1"); 469 470 dev = devvp->v_rdev; 471 /* 472 * Only VMIO the backing device if the backing device is a real 473 * block device. See ffs_mountmfs() for more details. 474 */ 475 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 476 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 477 vfs_object_create(devvp, td); 478 lwkt_gettoken(&vlock, devvp->v_interlock); 479 VOP_UNLOCK(devvp, &vlock, LK_INTERLOCK, td); 480 } 481 482 /* 483 * Step 2: re-read superblock from disk. 484 */ 485 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0) 486 size = DEV_BSIZE; 487 else 488 size = dpart.disklab->d_secsize; 489 if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, &bp)) != 0) 490 { 491 brelse(bp); 492 return (error); 493 } 494 newfs = (struct fs *)bp->b_data; 495 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || 496 newfs->fs_bsize < sizeof(struct fs)) { 497 brelse(bp); 498 return (EIO); /* XXX needs translation */ 499 } 500 fs = VFSTOUFS(mp)->um_fs; 501 /* 502 * Copy pointer fields back into superblock before copying in XXX 503 * new superblock. These should really be in the ufsmount. XXX 504 * Note that important parameters (eg fs_ncg) are unchanged. 505 */ 506 newfs->fs_csp = fs->fs_csp; 507 newfs->fs_maxcluster = fs->fs_maxcluster; 508 newfs->fs_contigdirs = fs->fs_contigdirs; 509 /* The filesystem is still read-only. */ 510 newfs->fs_ronly = 1; 511 bcopy(newfs, fs, (uint)fs->fs_sbsize); 512 if (fs->fs_sbsize < SBSIZE) 513 bp->b_flags |= B_INVAL; 514 brelse(bp); 515 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 516 ffs_oldfscompat(fs); 517 /* An old fsck may have zeroed these fields, so recheck them. */ 518 if (fs->fs_avgfilesize <= 0) /* XXX */ 519 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 520 if (fs->fs_avgfpdir <= 0) /* XXX */ 521 fs->fs_avgfpdir = AFPDIR; /* XXX */ 522 523 /* 524 * Step 3: re-read summary information from disk. 525 */ 526 blks = howmany(fs->fs_cssize, fs->fs_fsize); 527 space = fs->fs_csp; 528 for (i = 0; i < blks; i += fs->fs_frag) { 529 size = fs->fs_bsize; 530 if (i + fs->fs_frag > blks) 531 size = (blks - i) * fs->fs_fsize; 532 if (error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 533 &bp)) { 534 brelse(bp); 535 return (error); 536 } 537 bcopy(bp->b_data, space, (uint)size); 538 space = (char *)space + size; 539 brelse(bp); 540 } 541 /* 542 * We no longer know anything about clusters per cylinder group. 543 */ 544 if (fs->fs_contigsumsize > 0) { 545 lp = fs->fs_maxcluster; 546 for (i = 0; i < fs->fs_ncg; i++) 547 *lp++ = fs->fs_contigsumsize; 548 } 549 550 scaninfo.rescan = 0; 551 scaninfo.fs = fs; 552 scaninfo.devvp = devvp; 553 scaninfo.td = td; 554 while (error == 0 && scaninfo.rescan) { 555 scaninfo.rescan = 0; 556 error = vmntvnodescan(mp, ffs_reload_scan1, 557 ffs_reload_scan2, &scaninfo); 558 } 559 return(error); 560 } 561 562 static int 563 ffs_reload_scan1(struct mount *mp, struct vnode *vp, void *data) 564 { 565 struct scaninfo *info = data; 566 567 /* 568 * Step 4: invalidate all inactive vnodes. 569 */ 570 if (vrecycle(vp, NULL, info->td)) { 571 info->rescan = 1; 572 return(-1); /* continue loop, do not call scan2 */ 573 } 574 return(0); 575 } 576 577 static int 578 ffs_reload_scan2(struct mount *mp, struct vnode *vp, lwkt_tokref_t vlock, void *data) 579 { 580 struct scaninfo *info = data; 581 struct inode *ip; 582 struct buf *bp; 583 int error; 584 585 /* 586 * Step 5: invalidate all cached file data. 587 */ 588 if (vget(vp, vlock, LK_EXCLUSIVE | LK_INTERLOCK, info->td)) { 589 info->rescan = 1; 590 return(0); 591 } 592 if (vinvalbuf(vp, 0, info->td, 0, 0)) 593 panic("ffs_reload: dirty2"); 594 /* 595 * Step 6: re-read inode data for all active vnodes. 596 */ 597 ip = VTOI(vp); 598 error = bread(info->devvp, 599 fsbtodb(info->fs, ino_to_fsba(info->fs, ip->i_number)), 600 (int)info->fs->fs_bsize, &bp); 601 if (error) { 602 brelse(bp); 603 vput(vp); 604 return (error); 605 } 606 ip->i_din = *((struct dinode *)bp->b_data + 607 ino_to_fsbo(info->fs, ip->i_number)); 608 ip->i_effnlink = ip->i_nlink; 609 brelse(bp); 610 vput(vp); 611 return(0); 612 } 613 614 /* 615 * Common code for mount and mountroot 616 */ 617 int 618 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td, 619 struct malloc_type *malloctype) 620 { 621 struct ufsmount *ump; 622 struct buf *bp; 623 struct fs *fs; 624 dev_t dev; 625 struct partinfo dpart; 626 void *space; 627 int error, i, blks, size, ronly; 628 lwkt_tokref vlock; 629 int32_t *lp; 630 uint64_t maxfilesize; /* XXX */ 631 size_t strsize; 632 633 /* 634 * Disallow multiple mounts of the same device. 635 * Disallow mounting of a device that is currently in use 636 * (except for root, which might share swap device for miniroot). 637 * Flush out any old buffers remaining from a previous use. 638 */ 639 error = vfs_mountedon(devvp); 640 if (error) 641 return (error); 642 if (count_udev(devvp->v_udev) > 0 && devvp != rootvp) 643 return (EBUSY); 644 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 645 error = vinvalbuf(devvp, V_SAVE, td, 0, 0); 646 VOP_UNLOCK(devvp, NULL, 0, td); 647 if (error) 648 return (error); 649 650 /* 651 * Only VMIO the backing device if the backing device is a real 652 * block device. This excludes the original MFS implementation. 653 * Note that it is optional that the backing device be VMIOed. This 654 * increases the opportunity for metadata caching. 655 */ 656 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) { 657 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 658 vfs_object_create(devvp, td); 659 lwkt_gettoken(&vlock, devvp->v_interlock); 660 VOP_UNLOCK(devvp, &vlock, LK_INTERLOCK, td); 661 } 662 663 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 664 vn_lock(devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 665 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); 666 VOP_UNLOCK(devvp, NULL, 0, td); 667 if (error) 668 return (error); 669 dev = devvp->v_rdev; 670 if (dev->si_iosize_max != 0) 671 mp->mnt_iosize_max = dev->si_iosize_max; 672 if (mp->mnt_iosize_max > MAXPHYS) 673 mp->mnt_iosize_max = MAXPHYS; 674 675 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, proc0.p_ucred, td) != 0) 676 size = DEV_BSIZE; 677 else 678 size = dpart.disklab->d_secsize; 679 680 bp = NULL; 681 ump = NULL; 682 if ((error = bread(devvp, SBLOCK, SBSIZE, &bp)) != 0) 683 goto out; 684 fs = (struct fs *)bp->b_data; 685 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 686 fs->fs_bsize < sizeof(struct fs)) { 687 error = EINVAL; /* XXX needs translation */ 688 goto out; 689 } 690 fs->fs_fmod = 0; 691 fs->fs_flags &= ~FS_UNCLEAN; 692 if (fs->fs_clean == 0) { 693 fs->fs_flags |= FS_UNCLEAN; 694 if (ronly || (mp->mnt_flag & MNT_FORCE)) { 695 printf( 696 "WARNING: %s was not properly dismounted\n", 697 fs->fs_fsmnt); 698 } else { 699 printf( 700 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", 701 fs->fs_fsmnt); 702 error = EPERM; 703 goto out; 704 } 705 } 706 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ 707 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { 708 error = EROFS; /* needs translation */ 709 goto out; 710 } 711 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 712 bzero((caddr_t)ump, sizeof *ump); 713 ump->um_malloctype = malloctype; 714 ump->um_i_effnlink_valid = 1; 715 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, 716 M_WAITOK); 717 ump->um_blkatoff = ffs_blkatoff; 718 ump->um_truncate = ffs_truncate; 719 ump->um_update = ffs_update; 720 ump->um_valloc = ffs_valloc; 721 ump->um_vfree = ffs_vfree; 722 bcopy(bp->b_data, ump->um_fs, (uint)fs->fs_sbsize); 723 if (fs->fs_sbsize < SBSIZE) 724 bp->b_flags |= B_INVAL; 725 brelse(bp); 726 bp = NULL; 727 fs = ump->um_fs; 728 fs->fs_ronly = ronly; 729 size = fs->fs_cssize; 730 blks = howmany(size, fs->fs_fsize); 731 if (fs->fs_contigsumsize > 0) 732 size += fs->fs_ncg * sizeof(int32_t); 733 size += fs->fs_ncg * sizeof(uint8_t); 734 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 735 fs->fs_csp = space; 736 for (i = 0; i < blks; i += fs->fs_frag) { 737 size = fs->fs_bsize; 738 if (i + fs->fs_frag > blks) 739 size = (blks - i) * fs->fs_fsize; 740 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 741 &bp)) != 0) { 742 free(fs->fs_csp, M_UFSMNT); 743 goto out; 744 } 745 bcopy(bp->b_data, space, (uint)size); 746 space = (char *)space + size; 747 brelse(bp); 748 bp = NULL; 749 } 750 if (fs->fs_contigsumsize > 0) { 751 fs->fs_maxcluster = lp = space; 752 for (i = 0; i < fs->fs_ncg; i++) 753 *lp++ = fs->fs_contigsumsize; 754 space = lp; 755 } 756 size = fs->fs_ncg * sizeof(uint8_t); 757 fs->fs_contigdirs = (uint8_t *)space; 758 bzero(fs->fs_contigdirs, size); 759 /* Compatibility for old filesystems XXX */ 760 if (fs->fs_avgfilesize <= 0) /* XXX */ 761 fs->fs_avgfilesize = AVFILESIZ; /* XXX */ 762 if (fs->fs_avgfpdir <= 0) /* XXX */ 763 fs->fs_avgfpdir = AFPDIR; /* XXX */ 764 mp->mnt_data = (qaddr_t)ump; 765 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; 766 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; 767 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || 768 vfs_getvfs(&mp->mnt_stat.f_fsid)) 769 vfs_getnewfsid(mp); 770 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; 771 mp->mnt_flag |= MNT_LOCAL; 772 ump->um_mountp = mp; 773 ump->um_dev = dev; 774 ump->um_devvp = devvp; 775 ump->um_nindir = fs->fs_nindir; 776 ump->um_bptrtodb = fs->fs_fsbtodb; 777 ump->um_seqinc = fs->fs_frag; 778 for (i = 0; i < MAXQUOTAS; i++) 779 ump->um_quotas[i] = NULLVP; 780 dev->si_mountpoint = mp; 781 ffs_oldfscompat(fs); 782 783 /* 784 * Set FS local "last mounted on" information (NULL pad) 785 */ 786 copystr( mp->mnt_stat.f_mntonname, /* mount point*/ 787 fs->fs_fsmnt, /* copy area*/ 788 sizeof(fs->fs_fsmnt) - 1, /* max size*/ 789 &strsize); /* real size*/ 790 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 791 792 if( mp->mnt_flag & MNT_ROOTFS) { 793 /* 794 * Root mount; update timestamp in mount structure. 795 * this will be used by the common root mount code 796 * to update the system clock. 797 */ 798 mp->mnt_time = fs->fs_time; 799 } 800 801 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ 802 maxfilesize = (uint64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ 803 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */ 804 if (maxfilesize > (uint64_t)0x80000000u * PAGE_SIZE - 1) 805 maxfilesize = (uint64_t)0x80000000u * PAGE_SIZE - 1; 806 if (fs->fs_maxfilesize > maxfilesize) /* XXX */ 807 fs->fs_maxfilesize = maxfilesize; /* XXX */ 808 if (ronly == 0) { 809 if ((fs->fs_flags & FS_DOSOFTDEP) && 810 (error = softdep_mount(devvp, mp, fs)) != 0) { 811 free(fs->fs_csp, M_UFSMNT); 812 goto out; 813 } 814 fs->fs_fmod = 1; 815 fs->fs_clean = 0; 816 (void) ffs_sbupdate(ump, MNT_WAIT); 817 } 818 vfs_add_vnodeops(&mp->mnt_vn_ops, ffs_vnodeop_entries); 819 vfs_add_vnodeops(&mp->mnt_vn_spec_ops, ffs_specop_entries); 820 vfs_add_vnodeops(&mp->mnt_vn_fifo_ops, ffs_fifoop_entries); 821 822 return (0); 823 out: 824 dev->si_mountpoint = NULL; 825 if (bp) 826 brelse(bp); 827 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td); 828 if (ump) { 829 free(ump->um_fs, M_UFSMNT); 830 free(ump, M_UFSMNT); 831 mp->mnt_data = (qaddr_t)0; 832 } 833 return (error); 834 } 835 836 /* 837 * Sanity checks for old filesystems. 838 * 839 * XXX - goes away some day. 840 */ 841 static int 842 ffs_oldfscompat(struct fs *fs) 843 { 844 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ 845 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ 846 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 847 fs->fs_nrpos = 8; /* XXX */ 848 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 849 #if 0 850 int i; /* XXX */ 851 uint64_t sizepb = fs->fs_bsize; /* XXX */ 852 /* XXX */ 853 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ 854 for (i = 0; i < NIADDR; i++) { /* XXX */ 855 sizepb *= NINDIR(fs); /* XXX */ 856 fs->fs_maxfilesize += sizepb; /* XXX */ 857 } /* XXX */ 858 #endif 859 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 860 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ 861 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ 862 } /* XXX */ 863 return (0); 864 } 865 866 /* 867 * unmount system call 868 */ 869 int 870 ffs_unmount(struct mount *mp, int mntflags, struct thread *td) 871 { 872 struct ufsmount *ump; 873 struct fs *fs; 874 int error, flags; 875 876 flags = 0; 877 if (mntflags & MNT_FORCE) { 878 flags |= FORCECLOSE; 879 } 880 if (mp->mnt_flag & MNT_SOFTDEP) { 881 if ((error = softdep_flushfiles(mp, flags, td)) != 0) 882 return (error); 883 } else { 884 if ((error = ffs_flushfiles(mp, flags, td)) != 0) 885 return (error); 886 } 887 ump = VFSTOUFS(mp); 888 fs = ump->um_fs; 889 if (fs->fs_ronly == 0) { 890 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1; 891 error = ffs_sbupdate(ump, MNT_WAIT); 892 if (error) { 893 fs->fs_clean = 0; 894 return (error); 895 } 896 } 897 ump->um_devvp->v_rdev->si_mountpoint = NULL; 898 899 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0); 900 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, td); 901 902 vrele(ump->um_devvp); 903 904 free(fs->fs_csp, M_UFSMNT); 905 free(fs, M_UFSMNT); 906 free(ump, M_UFSMNT); 907 mp->mnt_data = (qaddr_t)0; 908 mp->mnt_flag &= ~MNT_LOCAL; 909 return (error); 910 } 911 912 /* 913 * Flush out all the files in a filesystem. 914 */ 915 int 916 ffs_flushfiles(struct mount *mp, int flags, struct thread *td) 917 { 918 struct ufsmount *ump; 919 int error; 920 921 ump = VFSTOUFS(mp); 922 #ifdef QUOTA 923 if (mp->mnt_flag & MNT_QUOTA) { 924 int i; 925 error = vflush(mp, 0, SKIPSYSTEM|flags); 926 if (error) 927 return (error); 928 for (i = 0; i < MAXQUOTAS; i++) { 929 if (ump->um_quotas[i] == NULLVP) 930 continue; 931 quotaoff(td, mp, i); 932 } 933 /* 934 * Here we fall through to vflush again to ensure 935 * that we have gotten rid of all the system vnodes. 936 */ 937 } 938 #endif 939 /* 940 * Flush all the files. 941 */ 942 if ((error = vflush(mp, 0, flags)) != 0) 943 return (error); 944 /* 945 * Flush filesystem metadata. 946 */ 947 vn_lock(ump->um_devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 948 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); 949 VOP_UNLOCK(ump->um_devvp, NULL, 0, td); 950 return (error); 951 } 952 953 /* 954 * Get filesystem statistics. 955 */ 956 int 957 ffs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 958 { 959 struct ufsmount *ump; 960 struct fs *fs; 961 962 ump = VFSTOUFS(mp); 963 fs = ump->um_fs; 964 if (fs->fs_magic != FS_MAGIC) 965 panic("ffs_statfs"); 966 sbp->f_bsize = fs->fs_fsize; 967 sbp->f_iosize = fs->fs_bsize; 968 sbp->f_blocks = fs->fs_dsize; 969 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + 970 fs->fs_cstotal.cs_nffree; 971 sbp->f_bavail = freespace(fs, fs->fs_minfree); 972 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 973 sbp->f_ffree = fs->fs_cstotal.cs_nifree; 974 if (sbp != &mp->mnt_stat) { 975 sbp->f_type = mp->mnt_vfc->vfc_typenum; 976 bcopy((caddr_t)mp->mnt_stat.f_mntonname, 977 (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 978 bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 979 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 980 } 981 return (0); 982 } 983 984 /* 985 * Go through the disk queues to initiate sandbagged IO; 986 * go through the inodes to write those that have been modified; 987 * initiate the writing of the super block if it has been modified. 988 * 989 * Note: we are always called with the filesystem marked `MPBUSY'. 990 */ 991 992 993 static int ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 994 static int ffs_sync_scan2(struct mount *mp, struct vnode *vp, 995 lwkt_tokref_t vlock, void *data); 996 997 int 998 ffs_sync(struct mount *mp, int waitfor, struct thread *td) 999 { 1000 struct ufsmount *ump = VFSTOUFS(mp); 1001 struct fs *fs; 1002 int error; 1003 struct scaninfo scaninfo; 1004 1005 fs = ump->um_fs; 1006 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1007 printf("fs = %s\n", fs->fs_fsmnt); 1008 panic("ffs_sync: rofs mod"); 1009 } 1010 1011 /* 1012 * Write back each (modified) inode. 1013 */ 1014 scaninfo.allerror = 0; 1015 scaninfo.rescan = 1; 1016 scaninfo.waitfor = waitfor; 1017 while (scaninfo.rescan) { 1018 scaninfo.rescan = 0; 1019 vmntvnodescan(mp, ffs_sync_scan1, ffs_sync_scan2, &scaninfo); 1020 } 1021 1022 /* 1023 * Force stale filesystem control information to be flushed. 1024 */ 1025 if (waitfor != MNT_LAZY) { 1026 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP) 1027 waitfor = MNT_NOWAIT; 1028 vn_lock(ump->um_devvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 1029 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0) 1030 scaninfo.allerror = error; 1031 VOP_UNLOCK(ump->um_devvp, NULL, 0, td); 1032 } 1033 #ifdef QUOTA 1034 qsync(mp); 1035 #endif 1036 /* 1037 * Write back modified superblock. 1038 */ 1039 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) 1040 scaninfo.allerror = error; 1041 return (scaninfo.allerror); 1042 } 1043 1044 static int 1045 ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 1046 { 1047 struct inode *ip; 1048 1049 /* 1050 * Depend on the mount list's vnode lock to keep things stable 1051 * enough for a quick test. Since there might be hundreds of 1052 * thousands of vnodes, we cannot afford even a subroutine 1053 * call unless there's a good chance that we have work to do. 1054 */ 1055 ip = VTOI(vp); 1056 if (vp->v_type == VNON || ((ip->i_flag & 1057 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1058 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1059 return(-1); 1060 } 1061 return(0); 1062 } 1063 1064 static int 1065 ffs_sync_scan2(struct mount *mp, struct vnode *vp, 1066 lwkt_tokref_t vlock, void *data) 1067 { 1068 struct scaninfo *info = data; 1069 thread_t td = curthread; /* XXX */ 1070 struct inode *ip; 1071 int error; 1072 1073 /* 1074 * We have to recheck after having obtained the vnode interlock. 1075 */ 1076 ip = VTOI(vp); 1077 if (vp->v_type == VNON || ((ip->i_flag & 1078 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 1079 TAILQ_EMPTY(&vp->v_dirtyblkhd))) { 1080 lwkt_reltoken(vlock); 1081 return(0); 1082 } 1083 if (vp->v_type != VCHR) { 1084 error = vget(vp, vlock, LK_INTERLOCK|LK_EXCLUSIVE|LK_NOWAIT, td); 1085 if (error) { 1086 if (error == ENOENT) 1087 info->rescan = 1; 1088 } else { 1089 if ((error = VOP_FSYNC(vp, info->waitfor, td)) != 0) 1090 info->allerror = error; 1091 VOP_UNLOCK(vp, NULL, 0, td); 1092 vrele(vp); 1093 } 1094 } else { 1095 /* 1096 * We must reference the vp to prevent it from 1097 * getting ripped out from under UFS_UPDATE, since 1098 * we are not holding a vnode lock. 1099 */ 1100 vref(vp); 1101 lwkt_reltoken(vlock); 1102 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */ 1103 UFS_UPDATE(vp, 0); 1104 vrele(vp); 1105 } 1106 return(0); 1107 } 1108 1109 /* 1110 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1111 * in from disk. If it is in core, wait for the lock bit to clear, then 1112 * return the inode locked. Detection and handling of mount points must be 1113 * done by the calling routine. 1114 */ 1115 static int ffs_inode_hash_lock; 1116 1117 int 1118 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1119 { 1120 struct fs *fs; 1121 struct inode *ip; 1122 struct ufsmount *ump; 1123 struct buf *bp; 1124 struct vnode *vp; 1125 dev_t dev; 1126 int error; 1127 1128 ump = VFSTOUFS(mp); 1129 dev = ump->um_dev; 1130 restart: 1131 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) { 1132 return (0); 1133 } 1134 1135 /* 1136 * Lock out the creation of new entries in the FFS hash table in 1137 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 1138 * may occur! 1139 */ 1140 if (ffs_inode_hash_lock) { 1141 while (ffs_inode_hash_lock) { 1142 ffs_inode_hash_lock = -1; 1143 tsleep(&ffs_inode_hash_lock, 0, "ffsvgt", 0); 1144 } 1145 goto restart; 1146 } 1147 ffs_inode_hash_lock = 1; 1148 1149 /* 1150 * If this MALLOC() is performed after the getnewvnode() 1151 * it might block, leaving a vnode with a NULL v_data to be 1152 * found by ffs_sync() if a sync happens to fire right then, 1153 * which will cause a panic because ffs_sync() blindly 1154 * dereferences vp->v_data (as well it should). 1155 */ 1156 MALLOC(ip, struct inode *, sizeof(struct inode), 1157 ump->um_malloctype, M_WAITOK); 1158 1159 /* Allocate a new vnode/inode. */ 1160 error = getnewvnode(VT_UFS, mp, mp->mnt_vn_ops, &vp); 1161 if (error) { 1162 if (ffs_inode_hash_lock < 0) 1163 wakeup(&ffs_inode_hash_lock); 1164 ffs_inode_hash_lock = 0; 1165 *vpp = NULL; 1166 FREE(ip, ump->um_malloctype); 1167 return (error); 1168 } 1169 bzero((caddr_t)ip, sizeof(struct inode)); 1170 lockinit(&ip->i_lock, 0, "inode", VLKTIMEOUT, LK_CANRECURSE); 1171 vp->v_data = ip; 1172 /* 1173 * FFS supports lock sharing in the stack of vnodes 1174 */ 1175 vp->v_vnlock = &ip->i_lock; 1176 ip->i_vnode = vp; 1177 ip->i_fs = fs = ump->um_fs; 1178 ip->i_dev = dev; 1179 ip->i_number = ino; 1180 #ifdef QUOTA 1181 { 1182 int i; 1183 for (i = 0; i < MAXQUOTAS; i++) 1184 ip->i_dquot[i] = NODQUOT; 1185 } 1186 #endif 1187 /* 1188 * Put it onto its hash chain and lock it so that other requests for 1189 * this inode will block if they arrive while we are sleeping waiting 1190 * for old data structures to be purged or for the contents of the 1191 * disk portion of this inode to be read. 1192 */ 1193 ufs_ihashins(ip); 1194 1195 if (ffs_inode_hash_lock < 0) 1196 wakeup(&ffs_inode_hash_lock); 1197 ffs_inode_hash_lock = 0; 1198 1199 /* Read in the disk contents for the inode, copy into the inode. */ 1200 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1201 (int)fs->fs_bsize, &bp); 1202 if (error) { 1203 /* 1204 * The inode does not contain anything useful, so it would 1205 * be misleading to leave it on its hash chain. With mode 1206 * still zero, it will be unlinked and returned to the free 1207 * list by vput(). 1208 */ 1209 brelse(bp); 1210 vput(vp); 1211 *vpp = NULL; 1212 return (error); 1213 } 1214 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); 1215 if (DOINGSOFTDEP(vp)) 1216 softdep_load_inodeblock(ip); 1217 else 1218 ip->i_effnlink = ip->i_nlink; 1219 bqrelse(bp); 1220 1221 /* 1222 * Initialize the vnode from the inode, check for aliases. 1223 * Note that the underlying vnode may have changed. 1224 */ 1225 error = ufs_vinit(mp, &vp); 1226 if (error) { 1227 vput(vp); 1228 *vpp = NULL; 1229 return (error); 1230 } 1231 /* 1232 * Finish inode initialization now that aliasing has been resolved. 1233 */ 1234 ip->i_devvp = ump->um_devvp; 1235 vref(ip->i_devvp); 1236 /* 1237 * Set up a generation number for this inode if it does not 1238 * already have one. This should only happen on old filesystems. 1239 */ 1240 if (ip->i_gen == 0) { 1241 ip->i_gen = random() / 2 + 1; 1242 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1243 ip->i_flag |= IN_MODIFIED; 1244 } 1245 /* 1246 * Ensure that uid and gid are correct. This is a temporary 1247 * fix until fsck has been changed to do the update. 1248 */ 1249 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1250 ip->i_uid = ip->i_din.di_ouid; /* XXX */ 1251 ip->i_gid = ip->i_din.di_ogid; /* XXX */ 1252 } /* XXX */ 1253 1254 *vpp = vp; 1255 return (0); 1256 } 1257 1258 /* 1259 * File handle to vnode 1260 * 1261 * Have to be really careful about stale file handles: 1262 * - check that the inode number is valid 1263 * - call ffs_vget() to get the locked inode 1264 * - check for an unallocated inode (i_mode == 0) 1265 * - check that the given client host has export rights and return 1266 * those rights via. exflagsp and credanonp 1267 */ 1268 int 1269 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1270 { 1271 struct ufid *ufhp; 1272 struct fs *fs; 1273 1274 ufhp = (struct ufid *)fhp; 1275 fs = VFSTOUFS(mp)->um_fs; 1276 if (ufhp->ufid_ino < ROOTINO || 1277 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1278 return (ESTALE); 1279 return (ufs_fhtovp(mp, ufhp, vpp)); 1280 } 1281 1282 /* 1283 * Vnode pointer to File handle 1284 */ 1285 /* ARGSUSED */ 1286 int 1287 ffs_vptofh(struct vnode *vp, struct fid *fhp) 1288 { 1289 struct inode *ip; 1290 struct ufid *ufhp; 1291 1292 ip = VTOI(vp); 1293 ufhp = (struct ufid *)fhp; 1294 ufhp->ufid_len = sizeof(struct ufid); 1295 ufhp->ufid_ino = ip->i_number; 1296 ufhp->ufid_gen = ip->i_gen; 1297 return (0); 1298 } 1299 1300 /* 1301 * Initialize the filesystem; just use ufs_init. 1302 */ 1303 static int 1304 ffs_init(struct vfsconf *vfsp) 1305 { 1306 softdep_initialize(); 1307 return (ufs_init(vfsp)); 1308 } 1309 1310 /* 1311 * Write a superblock and associated information back to disk. 1312 */ 1313 static int 1314 ffs_sbupdate(struct ufsmount *mp, int waitfor) 1315 { 1316 struct fs *dfs, *fs = mp->um_fs; 1317 struct buf *bp; 1318 int blks; 1319 void *space; 1320 int i, size, error, allerror = 0; 1321 1322 /* 1323 * First write back the summary information. 1324 */ 1325 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1326 space = fs->fs_csp; 1327 for (i = 0; i < blks; i += fs->fs_frag) { 1328 size = fs->fs_bsize; 1329 if (i + fs->fs_frag > blks) 1330 size = (blks - i) * fs->fs_fsize; 1331 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1332 size, 0, 0); 1333 bcopy(space, bp->b_data, (uint)size); 1334 space = (char *)space + size; 1335 if (waitfor != MNT_WAIT) 1336 bawrite(bp); 1337 else if ((error = bwrite(bp)) != 0) 1338 allerror = error; 1339 } 1340 /* 1341 * Now write back the superblock itself. If any errors occurred 1342 * up to this point, then fail so that the superblock avoids 1343 * being written out as clean. 1344 */ 1345 if (allerror) 1346 return (allerror); 1347 bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0); 1348 fs->fs_fmod = 0; 1349 fs->fs_time = time_second; 1350 bcopy((caddr_t)fs, bp->b_data, (uint)fs->fs_sbsize); 1351 /* Restore compatibility to old filesystems. XXX */ 1352 dfs = (struct fs *)bp->b_data; /* XXX */ 1353 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ 1354 dfs->fs_nrpos = -1; /* XXX */ 1355 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ 1356 int32_t *lp, tmp; /* XXX */ 1357 /* XXX */ 1358 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ 1359 tmp = lp[4]; /* XXX */ 1360 for (i = 4; i > 0; i--) /* XXX */ 1361 lp[i] = lp[i-1]; /* XXX */ 1362 lp[0] = tmp; /* XXX */ 1363 } /* XXX */ 1364 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ 1365 if (waitfor != MNT_WAIT) 1366 bawrite(bp); 1367 else if ((error = bwrite(bp)) != 0) 1368 allerror = error; 1369 return (allerror); 1370 } 1371