ffs_vfsops.c revision 1.118.2.13
1 /* $NetBSD: ffs_vfsops.c,v 1.118.2.13 2005/04/01 14:32:11 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ffs_vfsops.c,v 1.118.2.13 2005/04/01 14:32:11 skrll Exp $"); 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_ffs.h" 39 #include "opt_quota.h" 40 #include "opt_softdep.h" 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/namei.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> 48 #include <sys/vnode.h> 49 #include <sys/socket.h> 50 #include <sys/mount.h> 51 #include <sys/buf.h> 52 #include <sys/device.h> 53 #include <sys/mbuf.h> 54 #include <sys/file.h> 55 #include <sys/disklabel.h> 56 #include <sys/ioctl.h> 57 #include <sys/errno.h> 58 #include <sys/malloc.h> 59 #include <sys/pool.h> 60 #include <sys/lock.h> 61 #include <sys/sysctl.h> 62 #include <sys/conf.h> 63 64 #include <miscfs/specfs/specdev.h> 65 66 #include <ufs/ufs/quota.h> 67 #include <ufs/ufs/ufsmount.h> 68 #include <ufs/ufs/inode.h> 69 #include <ufs/ufs/dir.h> 70 #include <ufs/ufs/ufs_extern.h> 71 #include <ufs/ufs/ufs_bswap.h> 72 73 #include <ufs/ffs/fs.h> 74 #include <ufs/ffs/ffs_extern.h> 75 76 /* how many times ffs_init() was called */ 77 int ffs_initcount = 0; 78 79 extern struct lock ufs_hashlock; 80 81 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc; 82 extern const struct vnodeopv_desc ffs_specop_opv_desc; 83 extern const struct vnodeopv_desc ffs_fifoop_opv_desc; 84 85 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = { 86 &ffs_vnodeop_opv_desc, 87 &ffs_specop_opv_desc, 88 &ffs_fifoop_opv_desc, 89 NULL, 90 }; 91 92 struct vfsops ffs_vfsops = { 93 MOUNT_FFS, 94 ffs_mount, 95 ufs_start, 96 ffs_unmount, 97 ufs_root, 98 ufs_quotactl, 99 ffs_statvfs, 100 ffs_sync, 101 ffs_vget, 102 ffs_fhtovp, 103 ffs_vptofh, 104 ffs_init, 105 ffs_reinit, 106 ffs_done, 107 NULL, 108 ffs_mountroot, 109 ufs_check_export, 110 ffs_snapshot, 111 vfs_stdextattrctl, 112 ffs_vnodeopv_descs, 113 }; 114 VFS_ATTACH(ffs_vfsops); 115 116 struct genfs_ops ffs_genfsops = { 117 ffs_gop_size, 118 ufs_gop_alloc, 119 genfs_gop_write, 120 }; 121 122 POOL_INIT(ffs_inode_pool, sizeof(struct inode), 0, 0, 0, "ffsinopl", 123 &pool_allocator_nointr); 124 POOL_INIT(ffs_dinode1_pool, sizeof(struct ufs1_dinode), 0, 0, 0, "dino1pl", 125 &pool_allocator_nointr); 126 POOL_INIT(ffs_dinode2_pool, sizeof(struct ufs2_dinode), 0, 0, 0, "dino2pl", 127 &pool_allocator_nointr); 128 129 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t); 130 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 131 132 /* 133 * Called by main() when ffs is going to be mounted as root. 134 */ 135 136 int 137 ffs_mountroot() 138 { 139 struct fs *fs; 140 struct mount *mp; 141 struct lwp *l = curlwp; /* XXX */ 142 struct ufsmount *ump; 143 int error; 144 145 if (root_device->dv_class != DV_DISK) 146 return (ENODEV); 147 148 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) { 149 vrele(rootvp); 150 return (error); 151 } 152 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) { 153 mp->mnt_op->vfs_refcount--; 154 vfs_unbusy(mp); 155 free(mp, M_MOUNT); 156 return (error); 157 } 158 simple_lock(&mountlist_slock); 159 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 160 simple_unlock(&mountlist_slock); 161 ump = VFSTOUFS(mp); 162 fs = ump->um_fs; 163 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt)); 164 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0); 165 (void)ffs_statvfs(mp, &mp->mnt_stat, l); 166 vfs_unbusy(mp); 167 setrootfstime((time_t)fs->fs_time); 168 return (0); 169 } 170 171 /* 172 * VFS Operations. 173 * 174 * mount system call 175 */ 176 int 177 ffs_mount(mp, path, data, ndp, l) 178 struct mount *mp; 179 const char *path; 180 void *data; 181 struct nameidata *ndp; 182 struct lwp *l; 183 { 184 struct vnode *devvp = NULL; 185 struct ufs_args args; 186 struct ufsmount *ump = NULL; 187 struct proc *p; 188 struct fs *fs; 189 int error, flags, update; 190 mode_t accessmode; 191 192 p = l->l_proc; 193 if (mp->mnt_flag & MNT_GETARGS) { 194 ump = VFSTOUFS(mp); 195 if (ump == NULL) 196 return EIO; 197 args.fspec = NULL; 198 vfs_showexport(mp, &args.export, &ump->um_export); 199 return copyout(&args, data, sizeof(args)); 200 } 201 error = copyin(data, &args, sizeof (struct ufs_args)); 202 if (error) 203 return (error); 204 205 #if !defined(SOFTDEP) 206 mp->mnt_flag &= ~MNT_SOFTDEP; 207 #endif 208 209 update = mp->mnt_flag & MNT_UPDATE; 210 211 /* Check arguments */ 212 if (args.fspec != NULL) { 213 /* 214 * Look up the name and verify that it's sane. 215 */ 216 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 217 if ((error = namei(ndp)) != 0) 218 return (error); 219 devvp = ndp->ni_vp; 220 221 if (!update) { 222 /* 223 * Be sure this is a valid block device 224 */ 225 if (devvp->v_type != VBLK) 226 error = ENOTBLK; 227 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 228 error = ENXIO; 229 } else { 230 /* 231 * Be sure we're still naming the same device 232 * used for our initial mount 233 */ 234 ump = VFSTOUFS(mp); 235 if (devvp != ump->um_devvp) 236 error = EINVAL; 237 } 238 } else { 239 if (!update) { 240 /* New mounts must have a filename for the device */ 241 return (EINVAL); 242 } else { 243 /* Use the extant mount */ 244 ump = VFSTOUFS(mp); 245 devvp = ump->um_devvp; 246 vref(devvp); 247 } 248 } 249 250 /* 251 * If mount by non-root, then verify that user has necessary 252 * permissions on the device. 253 */ 254 if (error == 0 && p->p_ucred->cr_uid != 0) { 255 accessmode = VREAD; 256 if (update ? 257 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 258 (mp->mnt_flag & MNT_RDONLY) == 0) 259 accessmode |= VWRITE; 260 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 261 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, l); 262 VOP_UNLOCK(devvp, 0); 263 } 264 265 if (error) { 266 vrele(devvp); 267 return (error); 268 } 269 270 if (!update) { 271 int flags; 272 273 /* 274 * Disallow multiple mounts of the same device. 275 * Disallow mounting of a device that is currently in use 276 * (except for root, which might share swap device for 277 * miniroot). 278 */ 279 error = vfs_mountedon(devvp); 280 if (error) 281 goto fail; 282 if (vcount(devvp) > 1 && devvp != rootvp) { 283 error = EBUSY; 284 goto fail; 285 } 286 if (mp->mnt_flag & MNT_RDONLY) 287 flags = FREAD; 288 else 289 flags = FREAD|FWRITE; 290 error = VOP_OPEN(devvp, flags, FSCRED, l); 291 if (error) 292 goto fail; 293 error = ffs_mountfs(devvp, mp, l); 294 if (error) { 295 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 296 (void)VOP_CLOSE(devvp, flags, NOCRED, l); 297 VOP_UNLOCK(devvp, 0); 298 goto fail; 299 } 300 301 ump = VFSTOUFS(mp); 302 fs = ump->um_fs; 303 if ((mp->mnt_flag & (MNT_SOFTDEP | MNT_ASYNC)) == 304 (MNT_SOFTDEP | MNT_ASYNC)) { 305 printf("%s fs uses soft updates, " 306 "ignoring async mode\n", 307 fs->fs_fsmnt); 308 mp->mnt_flag &= ~MNT_ASYNC; 309 } 310 } else { 311 /* 312 * Update the mount. 313 */ 314 315 /* 316 * The initial mount got a reference on this 317 * device, so drop the one obtained via 318 * namei(), above. 319 */ 320 vrele(devvp); 321 322 ump = VFSTOUFS(mp); 323 fs = ump->um_fs; 324 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 325 /* 326 * Changing from r/w to r/o 327 */ 328 vn_start_write(NULL, &mp, V_WAIT); 329 flags = WRITECLOSE; 330 if (mp->mnt_flag & MNT_FORCE) 331 flags |= FORCECLOSE; 332 if (mp->mnt_flag & MNT_SOFTDEP) 333 error = softdep_flushfiles(mp, flags, l); 334 else 335 error = ffs_flushfiles(mp, flags, l); 336 if (fs->fs_pendingblocks != 0 || 337 fs->fs_pendinginodes != 0) { 338 printf("%s: update error: blocks %" PRId64 339 " files %d\n", 340 fs->fs_fsmnt, fs->fs_pendingblocks, 341 fs->fs_pendinginodes); 342 fs->fs_pendingblocks = 0; 343 fs->fs_pendinginodes = 0; 344 } 345 if (error == 0 && 346 ffs_cgupdate(ump, MNT_WAIT) == 0 && 347 fs->fs_clean & FS_WASCLEAN) { 348 if (mp->mnt_flag & MNT_SOFTDEP) 349 fs->fs_flags &= ~FS_DOSOFTDEP; 350 fs->fs_clean = FS_ISCLEAN; 351 (void) ffs_sbupdate(ump, MNT_WAIT); 352 } 353 vn_finished_write(mp, 0); 354 if (error) 355 return (error); 356 fs->fs_ronly = 1; 357 fs->fs_fmod = 0; 358 } 359 360 /* 361 * Flush soft dependencies if disabling it via an update 362 * mount. This may leave some items to be processed, 363 * so don't do this yet XXX. 364 */ 365 if ((fs->fs_flags & FS_DOSOFTDEP) && 366 !(mp->mnt_flag & MNT_SOFTDEP) && fs->fs_ronly == 0) { 367 #ifdef notyet 368 vn_start_write(NULL, &mp, V_WAIT); 369 flags = WRITECLOSE; 370 if (mp->mnt_flag & MNT_FORCE) 371 flags |= FORCECLOSE; 372 error = softdep_flushfiles(mp, flags, l); 373 if (error == 0 && ffs_cgupdate(ump, MNT_WAIT) == 0) 374 fs->fs_flags &= ~FS_DOSOFTDEP; 375 (void) ffs_sbupdate(ump, MNT_WAIT); 376 vn_finished_write(mp); 377 #elif defined(SOFTDEP) 378 mp->mnt_flag |= MNT_SOFTDEP; 379 #endif 380 } 381 382 /* 383 * When upgrading to a softdep mount, we must first flush 384 * all vnodes. (not done yet -- see above) 385 */ 386 if (!(fs->fs_flags & FS_DOSOFTDEP) && 387 (mp->mnt_flag & MNT_SOFTDEP) && fs->fs_ronly == 0) { 388 #ifdef notyet 389 vn_start_write(NULL, &mp, V_WAIT); 390 flags = WRITECLOSE; 391 if (mp->mnt_flag & MNT_FORCE) 392 flags |= FORCECLOSE; 393 error = ffs_flushfiles(mp, flags, l); 394 vn_finished_write(mp); 395 #else 396 mp->mnt_flag &= ~MNT_SOFTDEP; 397 #endif 398 } 399 400 if (mp->mnt_flag & MNT_RELOAD) { 401 error = ffs_reload(mp, p->p_ucred, l); 402 if (error) 403 return (error); 404 } 405 406 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 407 /* 408 * Changing from read-only to read/write 409 */ 410 fs->fs_ronly = 0; 411 fs->fs_clean <<= 1; 412 fs->fs_fmod = 1; 413 if ((fs->fs_flags & FS_DOSOFTDEP)) { 414 error = softdep_mount(devvp, mp, fs, 415 p->p_ucred); 416 if (error) 417 return (error); 418 } 419 if (fs->fs_snapinum[0] != 0) 420 ffs_snapshot_mount(mp); 421 } 422 if (args.fspec == 0) { 423 /* 424 * Process export requests. 425 */ 426 return (vfs_export(mp, &ump->um_export, &args.export)); 427 } 428 if ((mp->mnt_flag & (MNT_SOFTDEP | MNT_ASYNC)) == 429 (MNT_SOFTDEP | MNT_ASYNC)) { 430 printf("%s fs uses soft updates, ignoring async mode\n", 431 fs->fs_fsmnt); 432 mp->mnt_flag &= ~MNT_ASYNC; 433 } 434 } 435 436 error = set_statvfs_info(path, UIO_USERSPACE, args.fspec, 437 UIO_USERSPACE, mp, l); 438 if (error == 0) 439 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, 440 sizeof(fs->fs_fsmnt)); 441 if (mp->mnt_flag & MNT_SOFTDEP) 442 fs->fs_flags |= FS_DOSOFTDEP; 443 else 444 fs->fs_flags &= ~FS_DOSOFTDEP; 445 if (fs->fs_fmod != 0) { /* XXX */ 446 fs->fs_fmod = 0; 447 if (fs->fs_clean & FS_WASCLEAN) 448 fs->fs_time = time.tv_sec; 449 else { 450 printf("%s: file system not clean (fs_clean=%x); please fsck(8)\n", 451 mp->mnt_stat.f_mntfromname, fs->fs_clean); 452 printf("%s: lost blocks %" PRId64 " files %d\n", 453 mp->mnt_stat.f_mntfromname, fs->fs_pendingblocks, 454 fs->fs_pendinginodes); 455 } 456 (void) ffs_cgupdate(ump, MNT_WAIT); 457 } 458 return (error); 459 460 fail: 461 vrele(devvp); 462 return (error); 463 } 464 465 /* 466 * Reload all incore data for a filesystem (used after running fsck on 467 * the root filesystem and finding things to fix). The filesystem must 468 * be mounted read-only. 469 * 470 * Things to do to update the mount: 471 * 1) invalidate all cached meta-data. 472 * 2) re-read superblock from disk. 473 * 3) re-read summary information from disk. 474 * 4) invalidate all inactive vnodes. 475 * 5) invalidate all cached file data. 476 * 6) re-read inode data for all active vnodes. 477 */ 478 int 479 ffs_reload(mp, cred, l) 480 struct mount *mp; 481 struct ucred *cred; 482 struct lwp *l; 483 { 484 struct vnode *vp, *nvp, *devvp; 485 struct inode *ip; 486 void *space; 487 struct buf *bp; 488 struct fs *fs, *newfs; 489 struct partinfo dpart; 490 int i, blks, size, error; 491 int32_t *lp; 492 struct ufsmount *ump; 493 daddr_t sblockloc; 494 495 if ((mp->mnt_flag & MNT_RDONLY) == 0) 496 return (EINVAL); 497 498 ump = VFSTOUFS(mp); 499 /* 500 * Step 1: invalidate all cached meta-data. 501 */ 502 devvp = ump->um_devvp; 503 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 504 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 505 VOP_UNLOCK(devvp, 0); 506 if (error) 507 panic("ffs_reload: dirty1"); 508 /* 509 * Step 2: re-read superblock from disk. 510 */ 511 fs = ump->um_fs; 512 if (VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, NOCRED, l) != 0) 513 size = DEV_BSIZE; 514 else 515 size = dpart.disklab->d_secsize; 516 /* XXX we don't handle possibility that superblock moved. */ 517 error = bread(devvp, fs->fs_sblockloc / size, fs->fs_sbsize, 518 NOCRED, &bp); 519 if (error) { 520 brelse(bp); 521 return (error); 522 } 523 newfs = malloc(fs->fs_sbsize, M_UFSMNT, M_WAITOK); 524 memcpy(newfs, bp->b_data, fs->fs_sbsize); 525 #ifdef FFS_EI 526 if (ump->um_flags & UFS_NEEDSWAP) { 527 ffs_sb_swap((struct fs*)bp->b_data, newfs); 528 fs->fs_flags |= FS_SWAPPED; 529 } else 530 #endif 531 fs->fs_flags &= ~FS_SWAPPED; 532 if ((newfs->fs_magic != FS_UFS1_MAGIC && 533 newfs->fs_magic != FS_UFS2_MAGIC)|| 534 newfs->fs_bsize > MAXBSIZE || 535 newfs->fs_bsize < sizeof(struct fs)) { 536 brelse(bp); 537 free(newfs, M_UFSMNT); 538 return (EIO); /* XXX needs translation */ 539 } 540 /* Store off old fs_sblockloc for fs_oldfscompat_read. */ 541 sblockloc = fs->fs_sblockloc; 542 /* 543 * Copy pointer fields back into superblock before copying in XXX 544 * new superblock. These should really be in the ufsmount. XXX 545 * Note that important parameters (eg fs_ncg) are unchanged. 546 */ 547 newfs->fs_csp = fs->fs_csp; 548 newfs->fs_maxcluster = fs->fs_maxcluster; 549 newfs->fs_contigdirs = fs->fs_contigdirs; 550 newfs->fs_ronly = fs->fs_ronly; 551 newfs->fs_active = fs->fs_active; 552 memcpy(fs, newfs, (u_int)fs->fs_sbsize); 553 brelse(bp); 554 free(newfs, M_UFSMNT); 555 556 /* Recheck for apple UFS filesystem */ 557 ump->um_flags &= ~UFS_ISAPPLEUFS; 558 /* First check to see if this is tagged as an Apple UFS filesystem 559 * in the disklabel 560 */ 561 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l) == 0) && 562 (dpart.part->p_fstype == FS_APPLEUFS)) { 563 ump->um_flags |= UFS_ISAPPLEUFS; 564 } 565 #ifdef APPLE_UFS 566 else { 567 /* Manually look for an apple ufs label, and if a valid one 568 * is found, then treat it like an Apple UFS filesystem anyway 569 */ 570 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / size), 571 APPLEUFS_LABEL_SIZE, cred, &bp); 572 if (error) { 573 brelse(bp); 574 return (error); 575 } 576 error = ffs_appleufs_validate(fs->fs_fsmnt, 577 (struct appleufslabel *)bp->b_data,NULL); 578 if (error == 0) 579 ump->um_flags |= UFS_ISAPPLEUFS; 580 brelse(bp); 581 bp = NULL; 582 } 583 #else 584 if (ump->um_flags & UFS_ISAPPLEUFS) 585 return (EIO); 586 #endif 587 588 if (UFS_MPISAPPLEUFS(ump)) { 589 /* see comment about NeXT below */ 590 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 591 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 592 mp->mnt_iflag |= IMNT_DTYPE; 593 } else { 594 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 595 ump->um_dirblksiz = DIRBLKSIZ; 596 if (ump->um_maxsymlinklen > 0) 597 mp->mnt_iflag |= IMNT_DTYPE; 598 else 599 mp->mnt_iflag &= ~IMNT_DTYPE; 600 } 601 ffs_oldfscompat_read(fs, ump, sblockloc); 602 ump->um_maxfilesize = fs->fs_maxfilesize; 603 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 604 fs->fs_pendingblocks = 0; 605 fs->fs_pendinginodes = 0; 606 } 607 608 ffs_statvfs(mp, &mp->mnt_stat, l); 609 /* 610 * Step 3: re-read summary information from disk. 611 */ 612 blks = howmany(fs->fs_cssize, fs->fs_fsize); 613 space = fs->fs_csp; 614 for (i = 0; i < blks; i += fs->fs_frag) { 615 size = fs->fs_bsize; 616 if (i + fs->fs_frag > blks) 617 size = (blks - i) * fs->fs_fsize; 618 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 619 NOCRED, &bp); 620 if (error) { 621 brelse(bp); 622 return (error); 623 } 624 #ifdef FFS_EI 625 if (UFS_FSNEEDSWAP(fs)) 626 ffs_csum_swap((struct csum *)bp->b_data, 627 (struct csum *)space, size); 628 else 629 #endif 630 memcpy(space, bp->b_data, (size_t)size); 631 space = (char *)space + size; 632 brelse(bp); 633 } 634 if ((fs->fs_flags & FS_DOSOFTDEP)) 635 softdep_mount(devvp, mp, fs, cred); 636 if (fs->fs_snapinum[0] != 0) 637 ffs_snapshot_mount(mp); 638 /* 639 * We no longer know anything about clusters per cylinder group. 640 */ 641 if (fs->fs_contigsumsize > 0) { 642 lp = fs->fs_maxcluster; 643 for (i = 0; i < fs->fs_ncg; i++) 644 *lp++ = fs->fs_contigsumsize; 645 } 646 647 loop: 648 simple_lock(&mntvnode_slock); 649 for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 650 if (vp->v_mount != mp) { 651 simple_unlock(&mntvnode_slock); 652 goto loop; 653 } 654 nvp = vp->v_mntvnodes.le_next; 655 /* 656 * Step 4: invalidate all inactive vnodes. 657 */ 658 if (vrecycle(vp, &mntvnode_slock, l)) 659 goto loop; 660 /* 661 * Step 5: invalidate all cached file data. 662 */ 663 simple_lock(&vp->v_interlock); 664 simple_unlock(&mntvnode_slock); 665 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) 666 goto loop; 667 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 668 panic("ffs_reload: dirty2"); 669 /* 670 * Step 6: re-read inode data for all active vnodes. 671 */ 672 ip = VTOI(vp); 673 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 674 (int)fs->fs_bsize, NOCRED, &bp); 675 if (error) { 676 brelse(bp); 677 vput(vp); 678 return (error); 679 } 680 ffs_load_inode(bp, ip, fs, ip->i_number); 681 ip->i_ffs_effnlink = ip->i_nlink; 682 brelse(bp); 683 vput(vp); 684 simple_lock(&mntvnode_slock); 685 } 686 simple_unlock(&mntvnode_slock); 687 return (0); 688 } 689 690 /* 691 * Possible superblock locations ordered from most to least likely. 692 */ 693 static const int sblock_try[] = SBLOCKSEARCH; 694 695 /* 696 * Common code for mount and mountroot 697 */ 698 int 699 ffs_mountfs(devvp, mp, l) 700 struct vnode *devvp; 701 struct mount *mp; 702 struct lwp *l; 703 { 704 struct ufsmount *ump; 705 struct buf *bp; 706 struct fs *fs; 707 dev_t dev; 708 struct partinfo dpart; 709 void *space; 710 struct proc *p; 711 daddr_t sblockloc, fsblockloc; 712 int blks, fstype; 713 int error, i, size, ronly; 714 #ifdef FFS_EI 715 int needswap = 0; /* keep gcc happy */ 716 #endif 717 int32_t *lp; 718 struct ucred *cred; 719 u_int32_t sbsize = 8192; /* keep gcc happy*/ 720 721 dev = devvp->v_rdev; 722 p = l ? l->l_proc : NULL; 723 cred = p ? p->p_ucred : NOCRED; 724 725 /* Flush out any old buffers remaining from a previous use. */ 726 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 727 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 728 VOP_UNLOCK(devvp, 0); 729 if (error) 730 return (error); 731 732 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 733 if (VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l) != 0) 734 size = DEV_BSIZE; 735 else 736 size = dpart.disklab->d_secsize; 737 738 bp = NULL; 739 ump = NULL; 740 fs = NULL; 741 sblockloc = 0; 742 fstype = 0; 743 744 /* 745 * Try reading the superblock in each of its possible locations. */ 746 for (i = 0; ; i++) { 747 if (bp != NULL) { 748 bp->b_flags |= B_NOCACHE; 749 brelse(bp); 750 bp = NULL; 751 } 752 if (sblock_try[i] == -1) { 753 error = EINVAL; 754 fs = NULL; 755 goto out; 756 } 757 error = bread(devvp, sblock_try[i] / size, SBLOCKSIZE, cred, 758 &bp); 759 if (error) 760 goto out; 761 fs = (struct fs*)bp->b_data; 762 fsblockloc = sblockloc = sblock_try[i]; 763 if (fs->fs_magic == FS_UFS1_MAGIC) { 764 sbsize = fs->fs_sbsize; 765 fstype = UFS1; 766 #ifdef FFS_EI 767 needswap = 0; 768 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC)) { 769 sbsize = bswap32(fs->fs_sbsize); 770 fstype = UFS1; 771 needswap = 1; 772 #endif 773 } else if (fs->fs_magic == FS_UFS2_MAGIC) { 774 sbsize = fs->fs_sbsize; 775 fstype = UFS2; 776 #ifdef FFS_EI 777 needswap = 0; 778 } else if (fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 779 sbsize = bswap32(fs->fs_sbsize); 780 fstype = UFS2; 781 needswap = 1; 782 #endif 783 } else 784 continue; 785 786 787 /* fs->fs_sblockloc isn't defined for old filesystems */ 788 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) { 789 if (sblockloc == SBLOCK_UFS2) 790 /* 791 * This is likely to be the first alternate 792 * in a filesystem with 64k blocks. 793 * Don't use it. 794 */ 795 continue; 796 fsblockloc = sblockloc; 797 } else { 798 fsblockloc = fs->fs_sblockloc; 799 #ifdef FFS_EI 800 if (needswap) 801 fsblockloc = bswap64(fsblockloc); 802 #endif 803 } 804 805 /* Check we haven't found an alternate superblock */ 806 if (fsblockloc != sblockloc) 807 continue; 808 809 /* Validate size of superblock */ 810 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) 811 continue; 812 813 /* Ok seems to be a good superblock */ 814 break; 815 } 816 817 fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK); 818 memcpy(fs, bp->b_data, sbsize); 819 820 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 821 memset(ump, 0, sizeof *ump); 822 TAILQ_INIT(&ump->um_snapshots); 823 ump->um_fs = fs; 824 825 #ifdef FFS_EI 826 if (needswap) { 827 ffs_sb_swap((struct fs*)bp->b_data, fs); 828 fs->fs_flags |= FS_SWAPPED; 829 } else 830 #endif 831 fs->fs_flags &= ~FS_SWAPPED; 832 833 ffs_oldfscompat_read(fs, ump, sblockloc); 834 ump->um_maxfilesize = fs->fs_maxfilesize; 835 836 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 837 fs->fs_pendingblocks = 0; 838 fs->fs_pendinginodes = 0; 839 } 840 841 ump->um_fstype = fstype; 842 if (fs->fs_sbsize < SBLOCKSIZE) 843 bp->b_flags |= B_INVAL; 844 brelse(bp); 845 bp = NULL; 846 847 /* First check to see if this is tagged as an Apple UFS filesystem 848 * in the disklabel 849 */ 850 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l) == 0) && 851 (dpart.part->p_fstype == FS_APPLEUFS)) { 852 ump->um_flags |= UFS_ISAPPLEUFS; 853 } 854 #ifdef APPLE_UFS 855 else { 856 /* Manually look for an apple ufs label, and if a valid one 857 * is found, then treat it like an Apple UFS filesystem anyway 858 */ 859 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / size), 860 APPLEUFS_LABEL_SIZE, cred, &bp); 861 if (error) 862 goto out; 863 error = ffs_appleufs_validate(fs->fs_fsmnt, 864 (struct appleufslabel *)bp->b_data,NULL); 865 if (error == 0) { 866 ump->um_flags |= UFS_ISAPPLEUFS; 867 } 868 brelse(bp); 869 bp = NULL; 870 } 871 #else 872 if (ump->um_flags & UFS_ISAPPLEUFS) { 873 error = EINVAL; 874 goto out; 875 } 876 #endif 877 878 /* 879 * verify that we can access the last block in the fs 880 * if we're mounting read/write. 881 */ 882 883 if (!ronly) { 884 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize, 885 cred, &bp); 886 if (bp->b_bcount != fs->fs_fsize) 887 error = EINVAL; 888 bp->b_flags |= B_INVAL; 889 if (error) 890 goto out; 891 brelse(bp); 892 bp = NULL; 893 } 894 895 fs->fs_ronly = ronly; 896 if (ronly == 0) { 897 fs->fs_clean <<= 1; 898 fs->fs_fmod = 1; 899 } 900 size = fs->fs_cssize; 901 blks = howmany(size, fs->fs_fsize); 902 if (fs->fs_contigsumsize > 0) 903 size += fs->fs_ncg * sizeof(int32_t); 904 size += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 905 space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 906 fs->fs_csp = space; 907 for (i = 0; i < blks; i += fs->fs_frag) { 908 size = fs->fs_bsize; 909 if (i + fs->fs_frag > blks) 910 size = (blks - i) * fs->fs_fsize; 911 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 912 cred, &bp); 913 if (error) { 914 free(fs->fs_csp, M_UFSMNT); 915 goto out; 916 } 917 #ifdef FFS_EI 918 if (needswap) 919 ffs_csum_swap((struct csum *)bp->b_data, 920 (struct csum *)space, size); 921 else 922 #endif 923 memcpy(space, bp->b_data, (u_int)size); 924 925 space = (char *)space + size; 926 brelse(bp); 927 bp = NULL; 928 } 929 if (fs->fs_contigsumsize > 0) { 930 fs->fs_maxcluster = lp = space; 931 for (i = 0; i < fs->fs_ncg; i++) 932 *lp++ = fs->fs_contigsumsize; 933 space = lp; 934 } 935 size = fs->fs_ncg * sizeof(*fs->fs_contigdirs); 936 fs->fs_contigdirs = space; 937 space = (char *)space + size; 938 memset(fs->fs_contigdirs, 0, size); 939 /* Compatibility for old filesystems - XXX */ 940 if (fs->fs_avgfilesize <= 0) 941 fs->fs_avgfilesize = AVFILESIZ; 942 if (fs->fs_avgfpdir <= 0) 943 fs->fs_avgfpdir = AFPDIR; 944 fs->fs_active = NULL; 945 mp->mnt_data = ump; 946 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 947 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS); 948 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 949 mp->mnt_stat.f_namemax = MAXNAMLEN; 950 if (UFS_MPISAPPLEUFS(ump)) { 951 /* NeXT used to keep short symlinks in the inode even 952 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen 953 * is probably -1, but we still need to be able to identify 954 * short symlinks. 955 */ 956 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 957 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 958 mp->mnt_iflag |= IMNT_DTYPE; 959 } else { 960 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 961 ump->um_dirblksiz = DIRBLKSIZ; 962 if (ump->um_maxsymlinklen > 0) 963 mp->mnt_iflag |= IMNT_DTYPE; 964 else 965 mp->mnt_iflag &= ~IMNT_DTYPE; 966 } 967 mp->mnt_fs_bshift = fs->fs_bshift; 968 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 969 mp->mnt_flag |= MNT_LOCAL; 970 #ifdef FFS_EI 971 if (needswap) 972 ump->um_flags |= UFS_NEEDSWAP; 973 #endif 974 ump->um_mountp = mp; 975 ump->um_dev = dev; 976 ump->um_devvp = devvp; 977 ump->um_nindir = fs->fs_nindir; 978 ump->um_lognindir = ffs(fs->fs_nindir) - 1; 979 ump->um_bptrtodb = fs->fs_fsbtodb; 980 ump->um_seqinc = fs->fs_frag; 981 for (i = 0; i < MAXQUOTAS; i++) 982 ump->um_quotas[i] = NULLVP; 983 devvp->v_specmountpoint = mp; 984 if (ronly == 0 && (fs->fs_flags & FS_DOSOFTDEP)) { 985 error = softdep_mount(devvp, mp, fs, cred); 986 if (error) { 987 free(fs->fs_csp, M_UFSMNT); 988 goto out; 989 } 990 } 991 if (ronly == 0 && fs->fs_snapinum[0] != 0) 992 ffs_snapshot_mount(mp); 993 return (0); 994 out: 995 if (fs) 996 free(fs, M_UFSMNT); 997 devvp->v_specmountpoint = NULL; 998 if (bp) 999 brelse(bp); 1000 if (ump) { 1001 if (ump->um_oldfscompat) 1002 free(ump->um_oldfscompat, M_UFSMNT); 1003 free(ump, M_UFSMNT); 1004 mp->mnt_data = NULL; 1005 } 1006 return (error); 1007 } 1008 1009 /* 1010 * Sanity checks for loading old filesystem superblocks. 1011 * See ffs_oldfscompat_write below for unwound actions. 1012 * 1013 * XXX - Parts get retired eventually. 1014 * Unfortunately new bits get added. 1015 */ 1016 static void 1017 ffs_oldfscompat_read(fs, ump, sblockloc) 1018 struct fs *fs; 1019 struct ufsmount *ump; 1020 daddr_t sblockloc; 1021 { 1022 off_t maxfilesize; 1023 int32_t *extrasave; 1024 1025 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1026 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1027 return; 1028 1029 if (!ump->um_oldfscompat) 1030 ump->um_oldfscompat = malloc(512 + 3*sizeof(int32_t), 1031 M_UFSMNT, M_WAITOK); 1032 1033 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512); 1034 extrasave = ump->um_oldfscompat; 1035 extrasave += 512/sizeof(int32_t); 1036 extrasave[0] = fs->fs_old_npsect; 1037 extrasave[1] = fs->fs_old_interleave; 1038 extrasave[2] = fs->fs_old_trackskew; 1039 1040 /* These fields will be overwritten by their 1041 * original values in fs_oldfscompat_write, so it is harmless 1042 * to modify them here. 1043 */ 1044 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1045 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1046 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1047 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1048 1049 fs->fs_maxbsize = fs->fs_bsize; 1050 fs->fs_time = fs->fs_old_time; 1051 fs->fs_size = fs->fs_old_size; 1052 fs->fs_dsize = fs->fs_old_dsize; 1053 fs->fs_csaddr = fs->fs_old_csaddr; 1054 fs->fs_sblockloc = sblockloc; 1055 1056 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL); 1057 1058 if (fs->fs_old_postblformat == FS_42POSTBLFMT) { 1059 fs->fs_old_nrpos = 8; 1060 fs->fs_old_npsect = fs->fs_old_nsect; 1061 fs->fs_old_interleave = 1; 1062 fs->fs_old_trackskew = 0; 1063 } 1064 1065 if (fs->fs_old_inodefmt < FS_44INODEFMT) { 1066 ump->um_maxfilesize = (u_quad_t) 1LL << 39; 1067 fs->fs_qbmask = ~fs->fs_bmask; 1068 fs->fs_qfmask = ~fs->fs_fmask; 1069 } 1070 1071 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; 1072 if (ump->um_maxfilesize > maxfilesize) 1073 ump->um_maxfilesize = maxfilesize; 1074 1075 /* Compatibility for old filesystems */ 1076 if (fs->fs_avgfilesize <= 0) 1077 fs->fs_avgfilesize = AVFILESIZ; 1078 if (fs->fs_avgfpdir <= 0) 1079 fs->fs_avgfpdir = AFPDIR; 1080 1081 #if 0 1082 if (bigcgs) { 1083 fs->fs_save_cgsize = fs->fs_cgsize; 1084 fs->fs_cgsize = fs->fs_bsize; 1085 } 1086 #endif 1087 } 1088 1089 /* 1090 * Unwinding superblock updates for old filesystems. 1091 * See ffs_oldfscompat_read above for details. 1092 * 1093 * XXX - Parts get retired eventually. 1094 * Unfortunately new bits get added. 1095 */ 1096 static void 1097 ffs_oldfscompat_write(fs, ump) 1098 struct fs *fs; 1099 struct ufsmount *ump; 1100 { 1101 int32_t *extrasave; 1102 1103 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1104 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1105 return; 1106 1107 fs->fs_old_time = fs->fs_time; 1108 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1109 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1110 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1111 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1112 fs->fs_old_flags = fs->fs_flags; 1113 1114 #if 0 1115 if (bigcgs) { 1116 fs->fs_cgsize = fs->fs_save_cgsize; 1117 } 1118 #endif 1119 1120 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512); 1121 extrasave = ump->um_oldfscompat; 1122 extrasave += 512/sizeof(int32_t); 1123 fs->fs_old_npsect = extrasave[0]; 1124 fs->fs_old_interleave = extrasave[1]; 1125 fs->fs_old_trackskew = extrasave[2]; 1126 1127 } 1128 1129 /* 1130 * unmount system call 1131 */ 1132 int 1133 ffs_unmount(mp, mntflags, l) 1134 struct mount *mp; 1135 int mntflags; 1136 struct lwp *l; 1137 { 1138 struct ufsmount *ump; 1139 struct fs *fs; 1140 int error, flags, penderr; 1141 1142 penderr = 0; 1143 flags = 0; 1144 if (mntflags & MNT_FORCE) 1145 flags |= FORCECLOSE; 1146 if (mp->mnt_flag & MNT_SOFTDEP) { 1147 if ((error = softdep_flushfiles(mp, flags, l)) != 0) 1148 return (error); 1149 } else { 1150 if ((error = ffs_flushfiles(mp, flags, l)) != 0) 1151 return (error); 1152 } 1153 ump = VFSTOUFS(mp); 1154 fs = ump->um_fs; 1155 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1156 printf("%s: unmount pending error: blocks %" PRId64 1157 " files %d\n", 1158 fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); 1159 fs->fs_pendingblocks = 0; 1160 fs->fs_pendinginodes = 0; 1161 penderr = 1; 1162 } 1163 if (fs->fs_ronly == 0 && 1164 ffs_cgupdate(ump, MNT_WAIT) == 0 && 1165 fs->fs_clean & FS_WASCLEAN) { 1166 /* 1167 * XXXX don't mark fs clean in the case of softdep 1168 * pending block errors, until they are fixed. 1169 */ 1170 if (penderr == 0) { 1171 if (mp->mnt_flag & MNT_SOFTDEP) 1172 fs->fs_flags &= ~FS_DOSOFTDEP; 1173 fs->fs_clean = FS_ISCLEAN; 1174 } 1175 fs->fs_fmod = 0; 1176 (void) ffs_sbupdate(ump, MNT_WAIT); 1177 } 1178 if (ump->um_devvp->v_type != VBAD) 1179 ump->um_devvp->v_specmountpoint = NULL; 1180 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1181 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, 1182 NOCRED, l); 1183 vput(ump->um_devvp); 1184 free(fs->fs_csp, M_UFSMNT); 1185 free(fs, M_UFSMNT); 1186 if (ump->um_oldfscompat != NULL) 1187 free(ump->um_oldfscompat, M_UFSMNT); 1188 free(ump, M_UFSMNT); 1189 mp->mnt_data = NULL; 1190 mp->mnt_flag &= ~MNT_LOCAL; 1191 return (0); 1192 } 1193 1194 /* 1195 * Flush out all the files in a filesystem. 1196 */ 1197 int 1198 ffs_flushfiles(mp, flags, l) 1199 struct mount *mp; 1200 int flags; 1201 struct lwp *l; 1202 { 1203 extern int doforce; 1204 struct ufsmount *ump; 1205 int error; 1206 1207 if (!doforce) 1208 flags &= ~FORCECLOSE; 1209 ump = VFSTOUFS(mp); 1210 #ifdef QUOTA 1211 if (mp->mnt_flag & MNT_QUOTA) { 1212 int i; 1213 if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0) 1214 return (error); 1215 for (i = 0; i < MAXQUOTAS; i++) { 1216 if (ump->um_quotas[i] == NULLVP) 1217 continue; 1218 quotaoff(l, mp, i); 1219 } 1220 /* 1221 * Here we fall through to vflush again to ensure 1222 * that we have gotten rid of all the system vnodes. 1223 */ 1224 } 1225 #endif 1226 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1227 return (error); 1228 ffs_snapshot_unmount(mp); 1229 /* 1230 * Flush all the files. 1231 */ 1232 error = vflush(mp, NULLVP, flags); 1233 if (error) 1234 return (error); 1235 /* 1236 * Flush filesystem metadata. 1237 */ 1238 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1239 error = VOP_FSYNC(ump->um_devvp, l->l_proc->p_ucred, FSYNC_WAIT, 0, 0, l); 1240 VOP_UNLOCK(ump->um_devvp, 0); 1241 return (error); 1242 } 1243 1244 /* 1245 * Get file system statistics. 1246 */ 1247 int 1248 ffs_statvfs(mp, sbp, l) 1249 struct mount *mp; 1250 struct statvfs *sbp; 1251 struct lwp *l; 1252 { 1253 struct ufsmount *ump; 1254 struct fs *fs; 1255 1256 ump = VFSTOUFS(mp); 1257 fs = ump->um_fs; 1258 sbp->f_bsize = fs->fs_bsize; 1259 sbp->f_frsize = fs->fs_fsize; 1260 sbp->f_iosize = fs->fs_bsize; 1261 sbp->f_blocks = fs->fs_dsize; 1262 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) + 1263 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1264 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t) 1265 fs->fs_minfree) / (u_int64_t) 100; 1266 if (sbp->f_bfree > sbp->f_bresvd) 1267 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1268 else 1269 sbp->f_bavail = 0; 1270 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1271 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1272 sbp->f_favail = sbp->f_ffree; 1273 sbp->f_fresvd = 0; 1274 copy_statvfs_info(sbp, mp); 1275 return (0); 1276 } 1277 1278 /* 1279 * Go through the disk queues to initiate sandbagged IO; 1280 * go through the inodes to write those that have been modified; 1281 * initiate the writing of the super block if it has been modified. 1282 * 1283 * Note: we are always called with the filesystem marked `MPBUSY'. 1284 */ 1285 int 1286 ffs_sync(mp, waitfor, cred, l) 1287 struct mount *mp; 1288 int waitfor; 1289 struct ucred *cred; 1290 struct lwp *l; 1291 { 1292 struct vnode *vp, *nvp; 1293 struct inode *ip; 1294 struct ufsmount *ump = VFSTOUFS(mp); 1295 struct fs *fs; 1296 int error, count, allerror = 0; 1297 1298 fs = ump->um_fs; 1299 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1300 printf("fs = %s\n", fs->fs_fsmnt); 1301 panic("update: rofs mod"); 1302 } 1303 /* 1304 * Write back each (modified) inode. 1305 */ 1306 simple_lock(&mntvnode_slock); 1307 loop: 1308 for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) { 1309 /* 1310 * If the vnode that we are about to sync is no longer 1311 * associated with this mount point, start over. 1312 */ 1313 if (vp->v_mount != mp) 1314 goto loop; 1315 simple_lock(&vp->v_interlock); 1316 nvp = LIST_NEXT(vp, v_mntvnodes); 1317 ip = VTOI(vp); 1318 if (vp->v_type == VNON || 1319 ((ip->i_flag & 1320 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 1321 LIST_EMPTY(&vp->v_dirtyblkhd) && 1322 vp->v_uobj.uo_npages == 0)) 1323 { 1324 simple_unlock(&vp->v_interlock); 1325 continue; 1326 } 1327 simple_unlock(&mntvnode_slock); 1328 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK); 1329 if (error) { 1330 simple_lock(&mntvnode_slock); 1331 if (error == ENOENT) 1332 goto loop; 1333 continue; 1334 } 1335 if (vp->v_type == VREG && waitfor == MNT_LAZY) 1336 error = VOP_UPDATE(vp, NULL, NULL, 0); 1337 else 1338 error = VOP_FSYNC(vp, cred, 1339 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, l); 1340 if (error) 1341 allerror = error; 1342 vput(vp); 1343 simple_lock(&mntvnode_slock); 1344 } 1345 simple_unlock(&mntvnode_slock); 1346 /* 1347 * Force stale file system control information to be flushed. 1348 */ 1349 if (waitfor == MNT_WAIT && (ump->um_mountp->mnt_flag & MNT_SOFTDEP)) { 1350 if ((error = softdep_flushworklist(ump->um_mountp, &count, l))) 1351 allerror = error; 1352 /* Flushed work items may create new vnodes to clean */ 1353 if (allerror == 0 && count) { 1354 simple_lock(&mntvnode_slock); 1355 goto loop; 1356 } 1357 } 1358 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 || 1359 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) { 1360 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1361 if ((error = VOP_FSYNC(ump->um_devvp, cred, 1362 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, l)) != 0) 1363 allerror = error; 1364 VOP_UNLOCK(ump->um_devvp, 0); 1365 if (allerror == 0 && waitfor == MNT_WAIT) { 1366 simple_lock(&mntvnode_slock); 1367 goto loop; 1368 } 1369 } 1370 #ifdef QUOTA 1371 qsync(mp); 1372 #endif 1373 /* 1374 * Write back modified superblock. 1375 */ 1376 if (fs->fs_fmod != 0) { 1377 fs->fs_fmod = 0; 1378 fs->fs_time = time.tv_sec; 1379 if ((error = ffs_cgupdate(ump, waitfor))) 1380 allerror = error; 1381 } 1382 return (allerror); 1383 } 1384 1385 /* 1386 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1387 * in from disk. If it is in core, wait for the lock bit to clear, then 1388 * return the inode locked. Detection and handling of mount points must be 1389 * done by the calling routine. 1390 */ 1391 int 1392 ffs_vget(mp, ino, vpp) 1393 struct mount *mp; 1394 ino_t ino; 1395 struct vnode **vpp; 1396 { 1397 struct fs *fs; 1398 struct inode *ip; 1399 struct ufsmount *ump; 1400 struct buf *bp; 1401 struct vnode *vp; 1402 dev_t dev; 1403 int error; 1404 1405 ump = VFSTOUFS(mp); 1406 dev = ump->um_dev; 1407 1408 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1409 return (0); 1410 1411 /* Allocate a new vnode/inode. */ 1412 if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) { 1413 *vpp = NULL; 1414 return (error); 1415 } 1416 1417 /* 1418 * If someone beat us to it while sleeping in getnewvnode(), 1419 * push back the freshly allocated vnode we don't need, and return. 1420 */ 1421 1422 do { 1423 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) { 1424 ungetnewvnode(vp); 1425 return (0); 1426 } 1427 } while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)); 1428 1429 vp->v_flag |= VLOCKSWORK; 1430 1431 /* 1432 * XXX MFS ends up here, too, to allocate an inode. Should we 1433 * XXX create another pool for MFS inodes? 1434 */ 1435 1436 ip = pool_get(&ffs_inode_pool, PR_WAITOK); 1437 memset(ip, 0, sizeof(struct inode)); 1438 vp->v_data = ip; 1439 ip->i_vnode = vp; 1440 ip->i_ump = ump; 1441 ip->i_fs = fs = ump->um_fs; 1442 ip->i_dev = dev; 1443 ip->i_number = ino; 1444 LIST_INIT(&ip->i_pcbufhd); 1445 #ifdef QUOTA 1446 { 1447 int i; 1448 1449 for (i = 0; i < MAXQUOTAS; i++) 1450 ip->i_dquot[i] = NODQUOT; 1451 } 1452 #endif 1453 1454 /* 1455 * Put it onto its hash chain and lock it so that other requests for 1456 * this inode will block if they arrive while we are sleeping waiting 1457 * for old data structures to be purged or for the contents of the 1458 * disk portion of this inode to be read. 1459 */ 1460 1461 ufs_ihashins(ip); 1462 lockmgr(&ufs_hashlock, LK_RELEASE, 0); 1463 1464 /* Read in the disk contents for the inode, copy into the inode. */ 1465 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1466 (int)fs->fs_bsize, NOCRED, &bp); 1467 if (error) { 1468 1469 /* 1470 * The inode does not contain anything useful, so it would 1471 * be misleading to leave it on its hash chain. With mode 1472 * still zero, it will be unlinked and returned to the free 1473 * list by vput(). 1474 */ 1475 1476 vput(vp); 1477 brelse(bp); 1478 *vpp = NULL; 1479 return (error); 1480 } 1481 if (ip->i_ump->um_fstype == UFS1) 1482 ip->i_din.ffs1_din = pool_get(&ffs_dinode1_pool, PR_WAITOK); 1483 else 1484 ip->i_din.ffs2_din = pool_get(&ffs_dinode2_pool, PR_WAITOK); 1485 ffs_load_inode(bp, ip, fs, ino); 1486 if (DOINGSOFTDEP(vp)) 1487 softdep_load_inodeblock(ip); 1488 else 1489 ip->i_ffs_effnlink = ip->i_nlink; 1490 brelse(bp); 1491 1492 /* 1493 * Initialize the vnode from the inode, check for aliases. 1494 * Note that the underlying vnode may have changed. 1495 */ 1496 1497 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1498 1499 /* 1500 * Finish inode initialization now that aliasing has been resolved. 1501 */ 1502 1503 genfs_node_init(vp, &ffs_genfsops); 1504 ip->i_devvp = ump->um_devvp; 1505 VREF(ip->i_devvp); 1506 1507 /* 1508 * Ensure that uid and gid are correct. This is a temporary 1509 * fix until fsck has been changed to do the update. 1510 */ 1511 1512 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1513 ip->i_uid = ip->i_ffs1_ouid; /* XXX */ 1514 ip->i_gid = ip->i_ffs1_ogid; /* XXX */ 1515 } /* XXX */ 1516 uvm_vnp_setsize(vp, ip->i_size); 1517 *vpp = vp; 1518 return (0); 1519 } 1520 1521 /* 1522 * File handle to vnode 1523 * 1524 * Have to be really careful about stale file handles: 1525 * - check that the inode number is valid 1526 * - call ffs_vget() to get the locked inode 1527 * - check for an unallocated inode (i_mode == 0) 1528 * - check that the given client host has export rights and return 1529 * those rights via. exflagsp and credanonp 1530 */ 1531 int 1532 ffs_fhtovp(mp, fhp, vpp) 1533 struct mount *mp; 1534 struct fid *fhp; 1535 struct vnode **vpp; 1536 { 1537 struct ufid *ufhp; 1538 struct fs *fs; 1539 1540 ufhp = (struct ufid *)fhp; 1541 fs = VFSTOUFS(mp)->um_fs; 1542 if (ufhp->ufid_ino < ROOTINO || 1543 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1544 return (ESTALE); 1545 return (ufs_fhtovp(mp, ufhp, vpp)); 1546 } 1547 1548 /* 1549 * Vnode pointer to File handle 1550 */ 1551 /* ARGSUSED */ 1552 int 1553 ffs_vptofh(vp, fhp) 1554 struct vnode *vp; 1555 struct fid *fhp; 1556 { 1557 struct inode *ip; 1558 struct ufid *ufhp; 1559 1560 ip = VTOI(vp); 1561 ufhp = (struct ufid *)fhp; 1562 ufhp->ufid_len = sizeof(struct ufid); 1563 ufhp->ufid_ino = ip->i_number; 1564 ufhp->ufid_gen = ip->i_gen; 1565 return (0); 1566 } 1567 1568 void 1569 ffs_init() 1570 { 1571 if (ffs_initcount++ > 0) 1572 return; 1573 1574 #ifdef _LKM 1575 pool_init(&ffs_inode_pool, sizeof(struct inode), 0, 0, 0, 1576 "ffsinopl", &pool_allocator_nointr); 1577 pool_init(&ffs_dinode1_pool, sizeof(struct ufs1_dinode), 0, 0, 0, 1578 "dino1pl", &pool_allocator_nointr); 1579 pool_init(&ffs_dinode2_pool, sizeof(struct ufs2_dinode), 0, 0, 0, 1580 "dino2pl", &pool_allocator_nointr); 1581 #endif 1582 softdep_initialize(); 1583 ufs_init(); 1584 } 1585 1586 void 1587 ffs_reinit() 1588 { 1589 softdep_reinitialize(); 1590 ufs_reinit(); 1591 } 1592 1593 void 1594 ffs_done() 1595 { 1596 if (--ffs_initcount > 0) 1597 return; 1598 1599 /* XXX softdep cleanup ? */ 1600 ufs_done(); 1601 #ifdef _LKM 1602 pool_destroy(&ffs_dinode2_pool); 1603 pool_destroy(&ffs_dinode1_pool); 1604 pool_destroy(&ffs_inode_pool); 1605 #endif 1606 } 1607 1608 SYSCTL_SETUP(sysctl_vfs_ffs_setup, "sysctl vfs.ffs subtree setup") 1609 { 1610 extern int doasyncfree; 1611 extern int ffs_log_changeopt; 1612 1613 sysctl_createv(clog, 0, NULL, NULL, 1614 CTLFLAG_PERMANENT, 1615 CTLTYPE_NODE, "vfs", NULL, 1616 NULL, 0, NULL, 0, 1617 CTL_VFS, CTL_EOL); 1618 sysctl_createv(clog, 0, NULL, NULL, 1619 CTLFLAG_PERMANENT, 1620 CTLTYPE_NODE, "ffs", 1621 SYSCTL_DESCR("Berkeley Fast File System"), 1622 NULL, 0, NULL, 0, 1623 CTL_VFS, 1, CTL_EOL); 1624 1625 /* 1626 * @@@ should we even bother with these first three? 1627 */ 1628 sysctl_createv(clog, 0, NULL, NULL, 1629 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1630 CTLTYPE_INT, "doclusterread", NULL, 1631 sysctl_notavail, 0, NULL, 0, 1632 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL); 1633 sysctl_createv(clog, 0, NULL, NULL, 1634 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1635 CTLTYPE_INT, "doclusterwrite", NULL, 1636 sysctl_notavail, 0, NULL, 0, 1637 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL); 1638 sysctl_createv(clog, 0, NULL, NULL, 1639 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1640 CTLTYPE_INT, "doreallocblks", NULL, 1641 sysctl_notavail, 0, NULL, 0, 1642 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL); 1643 sysctl_createv(clog, 0, NULL, NULL, 1644 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1645 CTLTYPE_INT, "doasyncfree", 1646 SYSCTL_DESCR("Release dirty blocks asynchronously"), 1647 NULL, 0, &doasyncfree, 0, 1648 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL); 1649 sysctl_createv(clog, 0, NULL, NULL, 1650 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1651 CTLTYPE_INT, "log_changeopt", 1652 SYSCTL_DESCR("Log changes in optimization strategy"), 1653 NULL, 0, &ffs_log_changeopt, 0, 1654 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL); 1655 } 1656 1657 /* 1658 * Write a superblock and associated information back to disk. 1659 */ 1660 int 1661 ffs_sbupdate(mp, waitfor) 1662 struct ufsmount *mp; 1663 int waitfor; 1664 { 1665 struct fs *fs = mp->um_fs; 1666 struct buf *bp; 1667 int error = 0; 1668 u_int32_t saveflag; 1669 1670 bp = getblk(mp->um_devvp, 1671 fs->fs_sblockloc >> (fs->fs_fshift - fs->fs_fsbtodb), 1672 (int)fs->fs_sbsize, 0, 0); 1673 saveflag = fs->fs_flags & FS_INTERNAL; 1674 fs->fs_flags &= ~FS_INTERNAL; 1675 1676 memcpy(bp->b_data, fs, fs->fs_sbsize); 1677 1678 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 1679 #ifdef FFS_EI 1680 if (mp->um_flags & UFS_NEEDSWAP) 1681 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data); 1682 #endif 1683 fs->fs_flags |= saveflag; 1684 1685 if (waitfor == MNT_WAIT) 1686 error = bwrite(bp); 1687 else 1688 bawrite(bp); 1689 return (error); 1690 } 1691 1692 int 1693 ffs_cgupdate(mp, waitfor) 1694 struct ufsmount *mp; 1695 int waitfor; 1696 { 1697 struct fs *fs = mp->um_fs; 1698 struct buf *bp; 1699 int blks; 1700 void *space; 1701 int i, size, error = 0, allerror = 0; 1702 1703 allerror = ffs_sbupdate(mp, waitfor); 1704 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1705 space = fs->fs_csp; 1706 for (i = 0; i < blks; i += fs->fs_frag) { 1707 size = fs->fs_bsize; 1708 if (i + fs->fs_frag > blks) 1709 size = (blks - i) * fs->fs_fsize; 1710 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 1711 size, 0, 0); 1712 #ifdef FFS_EI 1713 if (mp->um_flags & UFS_NEEDSWAP) 1714 ffs_csum_swap((struct csum*)space, 1715 (struct csum*)bp->b_data, size); 1716 else 1717 #endif 1718 memcpy(bp->b_data, space, (u_int)size); 1719 space = (char *)space + size; 1720 if (waitfor == MNT_WAIT) 1721 error = bwrite(bp); 1722 else 1723 bawrite(bp); 1724 } 1725 if (!allerror && error) 1726 allerror = error; 1727 return (allerror); 1728 } 1729
Indexes created Sun Oct 19 02:09:48 GMT 2025