ffs_vfsops.c revision 1.278.2.1
1 /* $NetBSD: ffs_vfsops.c,v 1.278.2.1 2012/09/12 06:15:35 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wasabi Systems, Inc, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1989, 1991, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ffs_vfsops.c,v 1.278.2.1 2012/09/12 06:15:35 tls Exp $"); 65 66 #if defined(_KERNEL_OPT) 67 #include "opt_ffs.h" 68 #include "opt_quota.h" 69 #include "opt_wapbl.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/namei.h> 75 #include <sys/proc.h> 76 #include <sys/kernel.h> 77 #include <sys/vnode.h> 78 #include <sys/socket.h> 79 #include <sys/mount.h> 80 #include <sys/buf.h> 81 #include <sys/device.h> 82 #include <sys/disk.h> 83 #include <sys/mbuf.h> 84 #include <sys/file.h> 85 #include <sys/disklabel.h> 86 #include <sys/ioctl.h> 87 #include <sys/errno.h> 88 #include <sys/kmem.h> 89 #include <sys/pool.h> 90 #include <sys/lock.h> 91 #include <sys/sysctl.h> 92 #include <sys/conf.h> 93 #include <sys/kauth.h> 94 #include <sys/wapbl.h> 95 #include <sys/fstrans.h> 96 #include <sys/module.h> 97 98 #include <miscfs/genfs/genfs.h> 99 #include <miscfs/specfs/specdev.h> 100 101 #include <ufs/ufs/quota.h> 102 #include <ufs/ufs/ufsmount.h> 103 #include <ufs/ufs/inode.h> 104 #include <ufs/ufs/dir.h> 105 #include <ufs/ufs/ufs_extern.h> 106 #include <ufs/ufs/ufs_bswap.h> 107 #include <ufs/ufs/ufs_wapbl.h> 108 109 #include <ufs/ffs/fs.h> 110 #include <ufs/ffs/ffs_extern.h> 111 112 MODULE(MODULE_CLASS_VFS, ffs, NULL); 113 114 static int ffs_vfs_fsync(vnode_t *, int); 115 116 static struct sysctllog *ffs_sysctl_log; 117 118 static kauth_listener_t ffs_snapshot_listener; 119 120 /* how many times ffs_init() was called */ 121 int ffs_initcount = 0; 122 123 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc; 124 extern const struct vnodeopv_desc ffs_specop_opv_desc; 125 extern const struct vnodeopv_desc ffs_fifoop_opv_desc; 126 127 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = { 128 &ffs_vnodeop_opv_desc, 129 &ffs_specop_opv_desc, 130 &ffs_fifoop_opv_desc, 131 NULL, 132 }; 133 134 struct vfsops ffs_vfsops = { 135 MOUNT_FFS, 136 sizeof (struct ufs_args), 137 ffs_mount, 138 ufs_start, 139 ffs_unmount, 140 ufs_root, 141 ufs_quotactl, 142 ffs_statvfs, 143 ffs_sync, 144 ffs_vget, 145 ffs_fhtovp, 146 ffs_vptofh, 147 ffs_init, 148 ffs_reinit, 149 ffs_done, 150 ffs_mountroot, 151 ffs_snapshot, 152 ffs_extattrctl, 153 ffs_suspendctl, 154 genfs_renamelock_enter, 155 genfs_renamelock_exit, 156 ffs_vfs_fsync, 157 ffs_vnodeopv_descs, 158 0, 159 { NULL, NULL }, 160 }; 161 162 static const struct genfs_ops ffs_genfsops = { 163 .gop_size = ffs_gop_size, 164 .gop_alloc = ufs_gop_alloc, 165 .gop_write = genfs_gop_write, 166 .gop_markupdate = ufs_gop_markupdate, 167 }; 168 169 static const struct ufs_ops ffs_ufsops = { 170 .uo_itimes = ffs_itimes, 171 .uo_update = ffs_update, 172 .uo_truncate = ffs_truncate, 173 .uo_valloc = ffs_valloc, 174 .uo_vfree = ffs_vfree, 175 .uo_balloc = ffs_balloc, 176 .uo_unmark_vnode = (void (*)(vnode_t *))nullop, 177 }; 178 179 static int 180 ffs_snapshot_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, 181 void *arg0, void *arg1, void *arg2, void *arg3) 182 { 183 vnode_t *vp = arg2; 184 int result = KAUTH_RESULT_DEFER;; 185 186 if (action != KAUTH_SYSTEM_FS_SNAPSHOT) 187 return result; 188 189 if (VTOI(vp)->i_uid == kauth_cred_geteuid(cred)) 190 result = KAUTH_RESULT_ALLOW; 191 192 return result; 193 } 194 195 static int 196 ffs_modcmd(modcmd_t cmd, void *arg) 197 { 198 int error; 199 200 #if 0 201 extern int doasyncfree; 202 #endif 203 #ifdef UFS_EXTATTR 204 extern int ufs_extattr_autocreate; 205 #endif 206 extern int ffs_log_changeopt; 207 208 switch (cmd) { 209 case MODULE_CMD_INIT: 210 error = vfs_attach(&ffs_vfsops); 211 if (error != 0) 212 break; 213 214 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 215 CTLFLAG_PERMANENT, 216 CTLTYPE_NODE, "vfs", NULL, 217 NULL, 0, NULL, 0, 218 CTL_VFS, CTL_EOL); 219 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 220 CTLFLAG_PERMANENT, 221 CTLTYPE_NODE, "ffs", 222 SYSCTL_DESCR("Berkeley Fast File System"), 223 NULL, 0, NULL, 0, 224 CTL_VFS, 1, CTL_EOL); 225 /* 226 * @@@ should we even bother with these first three? 227 */ 228 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 230 CTLTYPE_INT, "doclusterread", NULL, 231 sysctl_notavail, 0, NULL, 0, 232 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL); 233 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 234 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 235 CTLTYPE_INT, "doclusterwrite", NULL, 236 sysctl_notavail, 0, NULL, 0, 237 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL); 238 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 239 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 240 CTLTYPE_INT, "doreallocblks", NULL, 241 sysctl_notavail, 0, NULL, 0, 242 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL); 243 #if 0 244 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 245 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 246 CTLTYPE_INT, "doasyncfree", 247 SYSCTL_DESCR("Release dirty blocks asynchronously"), 248 NULL, 0, &doasyncfree, 0, 249 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL); 250 #endif 251 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 252 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 253 CTLTYPE_INT, "log_changeopt", 254 SYSCTL_DESCR("Log changes in optimization strategy"), 255 NULL, 0, &ffs_log_changeopt, 0, 256 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL); 257 #ifdef UFS_EXTATTR 258 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL, 259 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 260 CTLTYPE_INT, "extattr_autocreate", 261 SYSCTL_DESCR("Size of attribute for " 262 "backing file autocreation"), 263 NULL, 0, &ufs_extattr_autocreate, 0, 264 CTL_VFS, 1, FFS_EXTATTR_AUTOCREATE, CTL_EOL); 265 266 #endif /* UFS_EXTATTR */ 267 268 ffs_snapshot_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, 269 ffs_snapshot_cb, NULL); 270 if (ffs_snapshot_listener == NULL) 271 printf("ffs_modcmd: can't listen on system scope.\n"); 272 273 break; 274 case MODULE_CMD_FINI: 275 error = vfs_detach(&ffs_vfsops); 276 if (error != 0) 277 break; 278 sysctl_teardown(&ffs_sysctl_log); 279 if (ffs_snapshot_listener != NULL) 280 kauth_unlisten_scope(ffs_snapshot_listener); 281 break; 282 default: 283 error = ENOTTY; 284 break; 285 } 286 287 return (error); 288 } 289 290 pool_cache_t ffs_inode_cache; 291 pool_cache_t ffs_dinode1_cache; 292 pool_cache_t ffs_dinode2_cache; 293 294 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t); 295 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *); 296 297 /* 298 * Called by main() when ffs is going to be mounted as root. 299 */ 300 301 int 302 ffs_mountroot(void) 303 { 304 struct fs *fs; 305 struct mount *mp; 306 struct lwp *l = curlwp; /* XXX */ 307 struct ufsmount *ump; 308 int error; 309 310 if (device_class(root_device) != DV_DISK) 311 return (ENODEV); 312 313 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) { 314 vrele(rootvp); 315 return (error); 316 } 317 318 /* 319 * We always need to be able to mount the root file system. 320 */ 321 mp->mnt_flag |= MNT_FORCE; 322 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) { 323 vfs_unbusy(mp, false, NULL); 324 vfs_destroy(mp); 325 return (error); 326 } 327 mp->mnt_flag &= ~MNT_FORCE; 328 mutex_enter(&mountlist_lock); 329 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 330 mutex_exit(&mountlist_lock); 331 ump = VFSTOUFS(mp); 332 fs = ump->um_fs; 333 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt)); 334 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0); 335 (void)ffs_statvfs(mp, &mp->mnt_stat); 336 vfs_unbusy(mp, false, NULL); 337 setrootfstime((time_t)fs->fs_time); 338 return (0); 339 } 340 341 /* 342 * VFS Operations. 343 * 344 * mount system call 345 */ 346 int 347 ffs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 348 { 349 struct lwp *l = curlwp; 350 struct vnode *devvp = NULL; 351 struct ufs_args *args = data; 352 struct ufsmount *ump = NULL; 353 struct fs *fs; 354 int error = 0, flags, update; 355 mode_t accessmode; 356 357 if (*data_len < sizeof *args) 358 return EINVAL; 359 360 if (mp->mnt_flag & MNT_GETARGS) { 361 ump = VFSTOUFS(mp); 362 if (ump == NULL) 363 return EIO; 364 args->fspec = NULL; 365 *data_len = sizeof *args; 366 return 0; 367 } 368 369 update = mp->mnt_flag & MNT_UPDATE; 370 371 /* Check arguments */ 372 if (args->fspec != NULL) { 373 /* 374 * Look up the name and verify that it's sane. 375 */ 376 error = namei_simple_user(args->fspec, 377 NSM_FOLLOW_NOEMULROOT, &devvp); 378 if (error != 0) 379 return (error); 380 381 if (!update) { 382 /* 383 * Be sure this is a valid block device 384 */ 385 if (devvp->v_type != VBLK) 386 error = ENOTBLK; 387 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 388 error = ENXIO; 389 } else { 390 /* 391 * Be sure we're still naming the same device 392 * used for our initial mount 393 */ 394 ump = VFSTOUFS(mp); 395 if (devvp != ump->um_devvp) { 396 if (devvp->v_rdev != ump->um_devvp->v_rdev) 397 error = EINVAL; 398 else { 399 vrele(devvp); 400 devvp = ump->um_devvp; 401 vref(devvp); 402 } 403 } 404 } 405 } else { 406 if (!update) { 407 /* New mounts must have a filename for the device */ 408 return (EINVAL); 409 } else { 410 /* Use the extant mount */ 411 ump = VFSTOUFS(mp); 412 devvp = ump->um_devvp; 413 vref(devvp); 414 } 415 } 416 417 /* 418 * If mount by non-root, then verify that user has necessary 419 * permissions on the device. 420 * 421 * Permission to update a mount is checked higher, so here we presume 422 * updating the mount is okay (for example, as far as securelevel goes) 423 * which leaves us with the normal check. 424 */ 425 if (error == 0) { 426 accessmode = VREAD; 427 if (update ? 428 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 429 (mp->mnt_flag & MNT_RDONLY) == 0) 430 accessmode |= VWRITE; 431 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 432 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 433 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 434 KAUTH_ARG(accessmode)); 435 VOP_UNLOCK(devvp); 436 } 437 438 if (error) { 439 vrele(devvp); 440 return (error); 441 } 442 443 #ifdef WAPBL 444 /* WAPBL can only be enabled on a r/w mount. */ 445 if ((mp->mnt_flag & MNT_RDONLY) && !(mp->mnt_iflag & IMNT_WANTRDWR)) { 446 mp->mnt_flag &= ~MNT_LOG; 447 } 448 #else /* !WAPBL */ 449 mp->mnt_flag &= ~MNT_LOG; 450 #endif /* !WAPBL */ 451 452 if (!update) { 453 int xflags; 454 455 if (mp->mnt_flag & MNT_RDONLY) 456 xflags = FREAD; 457 else 458 xflags = FREAD | FWRITE; 459 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 460 error = VOP_OPEN(devvp, xflags, FSCRED); 461 VOP_UNLOCK(devvp); 462 if (error) 463 goto fail; 464 error = ffs_mountfs(devvp, mp, l); 465 if (error) { 466 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 467 (void)VOP_CLOSE(devvp, xflags, NOCRED); 468 VOP_UNLOCK(devvp); 469 goto fail; 470 } 471 472 ump = VFSTOUFS(mp); 473 fs = ump->um_fs; 474 } else { 475 /* 476 * Update the mount. 477 */ 478 479 /* 480 * The initial mount got a reference on this 481 * device, so drop the one obtained via 482 * namei(), above. 483 */ 484 vrele(devvp); 485 486 ump = VFSTOUFS(mp); 487 fs = ump->um_fs; 488 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 489 /* 490 * Changing from r/w to r/o 491 */ 492 flags = WRITECLOSE; 493 if (mp->mnt_flag & MNT_FORCE) 494 flags |= FORCECLOSE; 495 error = ffs_flushfiles(mp, flags, l); 496 if (error == 0) 497 error = UFS_WAPBL_BEGIN(mp); 498 if (error == 0 && 499 ffs_cgupdate(ump, MNT_WAIT) == 0 && 500 fs->fs_clean & FS_WASCLEAN) { 501 if (mp->mnt_flag & MNT_SOFTDEP) 502 fs->fs_flags &= ~FS_DOSOFTDEP; 503 fs->fs_clean = FS_ISCLEAN; 504 (void) ffs_sbupdate(ump, MNT_WAIT); 505 } 506 if (error == 0) 507 UFS_WAPBL_END(mp); 508 if (error) 509 return (error); 510 } 511 512 #ifdef WAPBL 513 if ((mp->mnt_flag & MNT_LOG) == 0) { 514 error = ffs_wapbl_stop(mp, mp->mnt_flag & MNT_FORCE); 515 if (error) 516 return error; 517 } 518 #endif /* WAPBL */ 519 520 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 521 /* 522 * Finish change from r/w to r/o 523 */ 524 fs->fs_ronly = 1; 525 fs->fs_fmod = 0; 526 } 527 528 if (mp->mnt_flag & MNT_RELOAD) { 529 error = ffs_reload(mp, l->l_cred, l); 530 if (error) 531 return (error); 532 } 533 534 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 535 /* 536 * Changing from read-only to read/write 537 */ 538 #ifndef QUOTA2 539 if (fs->fs_flags & FS_DOQUOTA2) { 540 ump->um_flags |= UFS_QUOTA2; 541 uprintf("%s: options QUOTA2 not enabled%s\n", 542 mp->mnt_stat.f_mntonname, 543 (mp->mnt_flag & MNT_FORCE) ? "" : 544 ", not mounting"); 545 return EINVAL; 546 } 547 #endif 548 fs->fs_ronly = 0; 549 fs->fs_clean <<= 1; 550 fs->fs_fmod = 1; 551 #ifdef WAPBL 552 if (fs->fs_flags & FS_DOWAPBL) { 553 printf("%s: replaying log to disk\n", 554 mp->mnt_stat.f_mntonname); 555 KDASSERT(mp->mnt_wapbl_replay); 556 error = wapbl_replay_write(mp->mnt_wapbl_replay, 557 devvp); 558 if (error) { 559 return error; 560 } 561 wapbl_replay_stop(mp->mnt_wapbl_replay); 562 fs->fs_clean = FS_WASCLEAN; 563 } 564 #endif /* WAPBL */ 565 if (fs->fs_snapinum[0] != 0) 566 ffs_snapshot_mount(mp); 567 } 568 569 #ifdef WAPBL 570 error = ffs_wapbl_start(mp); 571 if (error) 572 return error; 573 #endif /* WAPBL */ 574 575 #ifdef QUOTA2 576 if (!fs->fs_ronly) { 577 error = ffs_quota2_mount(mp); 578 if (error) { 579 return error; 580 } 581 } 582 #endif 583 if (args->fspec == NULL) 584 return 0; 585 } 586 587 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 588 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 589 if (error == 0) 590 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, 591 sizeof(fs->fs_fsmnt)); 592 fs->fs_flags &= ~FS_DOSOFTDEP; 593 if (fs->fs_fmod != 0) { /* XXX */ 594 int err; 595 596 fs->fs_fmod = 0; 597 if (fs->fs_clean & FS_WASCLEAN) 598 fs->fs_time = time_second; 599 else { 600 printf("%s: file system not clean (fs_clean=%#x); " 601 "please fsck(8)\n", mp->mnt_stat.f_mntfromname, 602 fs->fs_clean); 603 printf("%s: lost blocks %" PRId64 " files %d\n", 604 mp->mnt_stat.f_mntfromname, fs->fs_pendingblocks, 605 fs->fs_pendinginodes); 606 } 607 err = UFS_WAPBL_BEGIN(mp); 608 if (err == 0) { 609 (void) ffs_cgupdate(ump, MNT_WAIT); 610 UFS_WAPBL_END(mp); 611 } 612 } 613 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) { 614 printf("%s: `-o softdep' is no longer supported, " 615 "consider `-o log'\n", mp->mnt_stat.f_mntfromname); 616 mp->mnt_flag &= ~MNT_SOFTDEP; 617 } 618 619 return (error); 620 621 fail: 622 vrele(devvp); 623 return (error); 624 } 625 626 /* 627 * Reload all incore data for a filesystem (used after running fsck on 628 * the root filesystem and finding things to fix). The filesystem must 629 * be mounted read-only. 630 * 631 * Things to do to update the mount: 632 * 1) invalidate all cached meta-data. 633 * 2) re-read superblock from disk. 634 * 3) re-read summary information from disk. 635 * 4) invalidate all inactive vnodes. 636 * 5) invalidate all cached file data. 637 * 6) re-read inode data for all active vnodes. 638 */ 639 int 640 ffs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 641 { 642 struct vnode *vp, *mvp, *devvp; 643 struct inode *ip; 644 void *space; 645 struct buf *bp; 646 struct fs *fs, *newfs; 647 struct dkwedge_info dkw; 648 int i, bsize, blks, error; 649 int32_t *lp; 650 struct ufsmount *ump; 651 daddr_t sblockloc; 652 653 if ((mp->mnt_flag & MNT_RDONLY) == 0) 654 return (EINVAL); 655 656 ump = VFSTOUFS(mp); 657 /* 658 * Step 1: invalidate all cached meta-data. 659 */ 660 devvp = ump->um_devvp; 661 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 662 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 663 VOP_UNLOCK(devvp); 664 if (error) 665 panic("ffs_reload: dirty1"); 666 /* 667 * Step 2: re-read superblock from disk. 668 */ 669 fs = ump->um_fs; 670 671 /* XXX we don't handle possibility that superblock moved. */ 672 error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, fs->fs_sbsize, 673 NOCRED, 0, &bp); 674 if (error) { 675 brelse(bp, 0); 676 return (error); 677 } 678 newfs = kmem_alloc(fs->fs_sbsize, KM_SLEEP); 679 memcpy(newfs, bp->b_data, fs->fs_sbsize); 680 #ifdef FFS_EI 681 if (ump->um_flags & UFS_NEEDSWAP) { 682 ffs_sb_swap((struct fs*)bp->b_data, newfs); 683 fs->fs_flags |= FS_SWAPPED; 684 } else 685 #endif 686 fs->fs_flags &= ~FS_SWAPPED; 687 if ((newfs->fs_magic != FS_UFS1_MAGIC && 688 newfs->fs_magic != FS_UFS2_MAGIC)|| 689 newfs->fs_bsize > MAXBSIZE || 690 newfs->fs_bsize < sizeof(struct fs)) { 691 brelse(bp, 0); 692 kmem_free(newfs, fs->fs_sbsize); 693 return (EIO); /* XXX needs translation */ 694 } 695 /* Store off old fs_sblockloc for fs_oldfscompat_read. */ 696 sblockloc = fs->fs_sblockloc; 697 /* 698 * Copy pointer fields back into superblock before copying in XXX 699 * new superblock. These should really be in the ufsmount. XXX 700 * Note that important parameters (eg fs_ncg) are unchanged. 701 */ 702 newfs->fs_csp = fs->fs_csp; 703 newfs->fs_maxcluster = fs->fs_maxcluster; 704 newfs->fs_contigdirs = fs->fs_contigdirs; 705 newfs->fs_ronly = fs->fs_ronly; 706 newfs->fs_active = fs->fs_active; 707 memcpy(fs, newfs, (u_int)fs->fs_sbsize); 708 brelse(bp, 0); 709 kmem_free(newfs, fs->fs_sbsize); 710 711 /* Recheck for apple UFS filesystem */ 712 ump->um_flags &= ~UFS_ISAPPLEUFS; 713 /* First check to see if this is tagged as an Apple UFS filesystem 714 * in the disklabel 715 */ 716 if (getdiskinfo(devvp, &dkw) == 0 && 717 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 718 ump->um_flags |= UFS_ISAPPLEUFS; 719 #ifdef APPLE_UFS 720 else { 721 /* Manually look for an apple ufs label, and if a valid one 722 * is found, then treat it like an Apple UFS filesystem anyway 723 * 724 * EINVAL is most probably a blocksize or alignment problem, 725 * it is unlikely that this is an Apple UFS filesystem then. 726 */ 727 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 728 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 729 if (error && error != EINVAL) { 730 brelse(bp, 0); 731 return (error); 732 } 733 if (error == 0) { 734 error = ffs_appleufs_validate(fs->fs_fsmnt, 735 (struct appleufslabel *)bp->b_data, NULL); 736 if (error == 0) 737 ump->um_flags |= UFS_ISAPPLEUFS; 738 } 739 brelse(bp, 0); 740 bp = NULL; 741 } 742 #else 743 if (ump->um_flags & UFS_ISAPPLEUFS) 744 return (EIO); 745 #endif 746 747 if (UFS_MPISAPPLEUFS(ump)) { 748 /* see comment about NeXT below */ 749 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 750 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 751 mp->mnt_iflag |= IMNT_DTYPE; 752 } else { 753 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 754 ump->um_dirblksiz = DIRBLKSIZ; 755 if (ump->um_maxsymlinklen > 0) 756 mp->mnt_iflag |= IMNT_DTYPE; 757 else 758 mp->mnt_iflag &= ~IMNT_DTYPE; 759 } 760 ffs_oldfscompat_read(fs, ump, sblockloc); 761 762 mutex_enter(&ump->um_lock); 763 ump->um_maxfilesize = fs->fs_maxfilesize; 764 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 765 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 766 mp->mnt_stat.f_mntonname, fs->fs_flags, 767 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 768 if ((mp->mnt_flag & MNT_FORCE) == 0) { 769 mutex_exit(&ump->um_lock); 770 return (EINVAL); 771 } 772 } 773 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 774 fs->fs_pendingblocks = 0; 775 fs->fs_pendinginodes = 0; 776 } 777 mutex_exit(&ump->um_lock); 778 779 ffs_statvfs(mp, &mp->mnt_stat); 780 /* 781 * Step 3: re-read summary information from disk. 782 */ 783 blks = howmany(fs->fs_cssize, fs->fs_fsize); 784 space = fs->fs_csp; 785 for (i = 0; i < blks; i += fs->fs_frag) { 786 bsize = fs->fs_bsize; 787 if (i + fs->fs_frag > blks) 788 bsize = (blks - i) * fs->fs_fsize; 789 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 790 NOCRED, 0, &bp); 791 if (error) { 792 brelse(bp, 0); 793 return (error); 794 } 795 #ifdef FFS_EI 796 if (UFS_FSNEEDSWAP(fs)) 797 ffs_csum_swap((struct csum *)bp->b_data, 798 (struct csum *)space, bsize); 799 else 800 #endif 801 memcpy(space, bp->b_data, (size_t)bsize); 802 space = (char *)space + bsize; 803 brelse(bp, 0); 804 } 805 if (fs->fs_snapinum[0] != 0) 806 ffs_snapshot_mount(mp); 807 /* 808 * We no longer know anything about clusters per cylinder group. 809 */ 810 if (fs->fs_contigsumsize > 0) { 811 lp = fs->fs_maxcluster; 812 for (i = 0; i < fs->fs_ncg; i++) 813 *lp++ = fs->fs_contigsumsize; 814 } 815 816 /* Allocate a marker vnode. */ 817 mvp = vnalloc(mp); 818 /* 819 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 820 * and vclean() can be called indirectly 821 */ 822 mutex_enter(&mntvnode_lock); 823 loop: 824 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 825 vmark(mvp, vp); 826 if (vp->v_mount != mp || vismarker(vp)) 827 continue; 828 /* 829 * Step 4: invalidate all inactive vnodes. 830 */ 831 if (vrecycle(vp, &mntvnode_lock, l)) { 832 mutex_enter(&mntvnode_lock); 833 (void)vunmark(mvp); 834 goto loop; 835 } 836 /* 837 * Step 5: invalidate all cached file data. 838 */ 839 mutex_enter(vp->v_interlock); 840 mutex_exit(&mntvnode_lock); 841 if (vget(vp, LK_EXCLUSIVE)) { 842 (void)vunmark(mvp); 843 goto loop; 844 } 845 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 846 panic("ffs_reload: dirty2"); 847 /* 848 * Step 6: re-read inode data for all active vnodes. 849 */ 850 ip = VTOI(vp); 851 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 852 (int)fs->fs_bsize, NOCRED, 0, &bp); 853 if (error) { 854 brelse(bp, 0); 855 vput(vp); 856 (void)vunmark(mvp); 857 break; 858 } 859 ffs_load_inode(bp, ip, fs, ip->i_number); 860 brelse(bp, 0); 861 vput(vp); 862 mutex_enter(&mntvnode_lock); 863 } 864 mutex_exit(&mntvnode_lock); 865 vnfree(mvp); 866 return (error); 867 } 868 869 /* 870 * Possible superblock locations ordered from most to least likely. 871 */ 872 static const int sblock_try[] = SBLOCKSEARCH; 873 874 /* 875 * Common code for mount and mountroot 876 */ 877 int 878 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 879 { 880 struct ufsmount *ump; 881 struct buf *bp; 882 struct fs *fs; 883 dev_t dev; 884 struct disk *diskp; 885 struct dkwedge_info dkw; 886 void *space; 887 daddr_t sblockloc, fsblockloc; 888 int blks, fstype; 889 int error, i, bsize, ronly, bset = 0; 890 #ifdef FFS_EI 891 int needswap = 0; /* keep gcc happy */ 892 #endif 893 int32_t *lp; 894 kauth_cred_t cred; 895 u_int32_t sbsize = 8192; /* keep gcc happy*/ 896 u_int32_t allocsbsize; 897 int32_t fsbsize; 898 899 dev = devvp->v_rdev; 900 if ((diskp = disk_find_blk(dev)) == NULL) { 901 panic("no disk for device %d %d", major(dev), DISKUNIT(dev)); 902 } 903 904 cred = l ? l->l_cred : NOCRED; 905 906 /* Flush out any old buffers remaining from a previous use. */ 907 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 908 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 909 VOP_UNLOCK(devvp); 910 if (error) 911 return (error); 912 913 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 914 915 bp = NULL; 916 ump = NULL; 917 fs = NULL; 918 sblockloc = 0; 919 fstype = 0; 920 921 error = fstrans_mount(mp); 922 if (error) 923 return error; 924 925 /* 926 * Get the maximum I/O size for the underlying device. 927 */ 928 mp->mnt_maxphys = disk_maxphys(diskp); 929 aprint_debug("ffs_mount: disk %s maxphys %d\n", 930 diskp->dk_name, mp->mnt_maxphys); 931 932 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 933 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE); 934 error = ffs_snapshot_init(ump); 935 if (error) 936 goto out; 937 ump->um_ops = &ffs_ufsops; 938 939 #ifdef WAPBL 940 sbagain: 941 #endif 942 /* 943 * Try reading the superblock in each of its possible locations. 944 */ 945 for (i = 0; ; i++) { 946 if (bp != NULL) { 947 brelse(bp, BC_NOCACHE); 948 bp = NULL; 949 } 950 if (sblock_try[i] == -1) { 951 error = EINVAL; 952 fs = NULL; 953 goto out; 954 } 955 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred, 956 0, &bp); 957 if (error) { 958 fs = NULL; 959 goto out; 960 } 961 fs = (struct fs*)bp->b_data; 962 fsblockloc = sblockloc = sblock_try[i]; 963 if (fs->fs_magic == FS_UFS1_MAGIC) { 964 sbsize = fs->fs_sbsize; 965 fstype = UFS1; 966 fsbsize = fs->fs_bsize; 967 #ifdef FFS_EI 968 needswap = 0; 969 } else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED) { 970 sbsize = bswap32(fs->fs_sbsize); 971 fstype = UFS1; 972 fsbsize = bswap32(fs->fs_bsize); 973 needswap = 1; 974 #endif 975 } else if (fs->fs_magic == FS_UFS2_MAGIC) { 976 sbsize = fs->fs_sbsize; 977 fstype = UFS2; 978 fsbsize = fs->fs_bsize; 979 #ifdef FFS_EI 980 needswap = 0; 981 } else if (fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 982 sbsize = bswap32(fs->fs_sbsize); 983 fstype = UFS2; 984 fsbsize = bswap32(fs->fs_bsize); 985 needswap = 1; 986 #endif 987 } else 988 continue; 989 990 991 /* fs->fs_sblockloc isn't defined for old filesystems */ 992 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) { 993 if (sblockloc == SBLOCK_UFS2) 994 /* 995 * This is likely to be the first alternate 996 * in a filesystem with 64k blocks. 997 * Don't use it. 998 */ 999 continue; 1000 fsblockloc = sblockloc; 1001 } else { 1002 fsblockloc = fs->fs_sblockloc; 1003 #ifdef FFS_EI 1004 if (needswap) 1005 fsblockloc = bswap64(fsblockloc); 1006 #endif 1007 } 1008 1009 /* Check we haven't found an alternate superblock */ 1010 if (fsblockloc != sblockloc) 1011 continue; 1012 1013 /* Validate size of superblock */ 1014 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) 1015 continue; 1016 1017 /* Check that we can handle the file system blocksize */ 1018 if (fsbsize > MAXBSIZE) { 1019 printf("ffs_mountfs: block size (%d) > MAXBSIZE (%d)\n", 1020 fsbsize, MAXBSIZE); 1021 continue; 1022 } 1023 1024 /* Ok seems to be a good superblock */ 1025 break; 1026 } 1027 1028 fs = kmem_alloc((u_long)sbsize, KM_SLEEP); 1029 memcpy(fs, bp->b_data, sbsize); 1030 ump->um_fs = fs; 1031 1032 #ifdef FFS_EI 1033 if (needswap) { 1034 ffs_sb_swap((struct fs*)bp->b_data, fs); 1035 fs->fs_flags |= FS_SWAPPED; 1036 } else 1037 #endif 1038 fs->fs_flags &= ~FS_SWAPPED; 1039 1040 #ifdef WAPBL 1041 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) { 1042 error = ffs_wapbl_replay_start(mp, fs, devvp); 1043 if (error && (mp->mnt_flag & MNT_FORCE) == 0) 1044 goto out; 1045 if (!error) { 1046 if (!ronly) { 1047 /* XXX fsmnt may be stale. */ 1048 printf("%s: replaying log to disk\n", 1049 fs->fs_fsmnt); 1050 error = wapbl_replay_write(mp->mnt_wapbl_replay, 1051 devvp); 1052 if (error) 1053 goto out; 1054 wapbl_replay_stop(mp->mnt_wapbl_replay); 1055 fs->fs_clean = FS_WASCLEAN; 1056 } else { 1057 /* XXX fsmnt may be stale */ 1058 printf("%s: replaying log to memory\n", 1059 fs->fs_fsmnt); 1060 } 1061 1062 /* Force a re-read of the superblock */ 1063 brelse(bp, BC_INVAL); 1064 bp = NULL; 1065 kmem_free(fs, sbsize); 1066 fs = NULL; 1067 goto sbagain; 1068 } 1069 } 1070 #else /* !WAPBL */ 1071 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) { 1072 error = EPERM; 1073 goto out; 1074 } 1075 #endif /* !WAPBL */ 1076 1077 ffs_oldfscompat_read(fs, ump, sblockloc); 1078 ump->um_maxfilesize = fs->fs_maxfilesize; 1079 1080 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) { 1081 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n", 1082 mp->mnt_stat.f_mntonname, fs->fs_flags, 1083 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 1084 if ((mp->mnt_flag & MNT_FORCE) == 0) { 1085 error = EINVAL; 1086 goto out; 1087 } 1088 } 1089 1090 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { 1091 fs->fs_pendingblocks = 0; 1092 fs->fs_pendinginodes = 0; 1093 } 1094 1095 ump->um_fstype = fstype; 1096 if (fs->fs_sbsize < SBLOCKSIZE) 1097 brelse(bp, BC_INVAL); 1098 else 1099 brelse(bp, 0); 1100 bp = NULL; 1101 1102 /* First check to see if this is tagged as an Apple UFS filesystem 1103 * in the disklabel 1104 */ 1105 if (getdiskinfo(devvp, &dkw) == 0 && 1106 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 1107 ump->um_flags |= UFS_ISAPPLEUFS; 1108 #ifdef APPLE_UFS 1109 else { 1110 /* Manually look for an apple ufs label, and if a valid one 1111 * is found, then treat it like an Apple UFS filesystem anyway 1112 */ 1113 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE), 1114 APPLEUFS_LABEL_SIZE, cred, 0, &bp); 1115 if (error) 1116 goto out; 1117 error = ffs_appleufs_validate(fs->fs_fsmnt, 1118 (struct appleufslabel *)bp->b_data, NULL); 1119 if (error == 0) { 1120 ump->um_flags |= UFS_ISAPPLEUFS; 1121 } 1122 brelse(bp, 0); 1123 bp = NULL; 1124 } 1125 #else 1126 if (ump->um_flags & UFS_ISAPPLEUFS) { 1127 error = EINVAL; 1128 goto out; 1129 } 1130 #endif 1131 1132 #if 0 1133 /* 1134 * XXX This code changes the behaviour of mounting dirty filesystems, to 1135 * XXX require "mount -f ..." to mount them. This doesn't match what 1136 * XXX mount(8) describes and is disabled for now. 1137 */ 1138 /* 1139 * If the file system is not clean, don't allow it to be mounted 1140 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set 1141 * for the root file system.) 1142 */ 1143 if (fs->fs_flags & FS_DOWAPBL) { 1144 /* 1145 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL 1146 * bit is set, although there's a window in unmount where it 1147 * could be FS_ISCLEAN 1148 */ 1149 if ((mp->mnt_flag & MNT_FORCE) == 0 && 1150 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) { 1151 error = EPERM; 1152 goto out; 1153 } 1154 } else 1155 if ((fs->fs_clean & FS_ISCLEAN) == 0 && 1156 (mp->mnt_flag & MNT_FORCE) == 0) { 1157 error = EPERM; 1158 goto out; 1159 } 1160 #endif 1161 1162 /* 1163 * verify that we can access the last block in the fs 1164 * if we're mounting read/write. 1165 */ 1166 1167 if (!ronly) { 1168 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize, 1169 cred, 0, &bp); 1170 if (bp->b_bcount != fs->fs_fsize) 1171 error = EINVAL; 1172 if (error) { 1173 bset = BC_INVAL; 1174 goto out; 1175 } 1176 brelse(bp, BC_INVAL); 1177 bp = NULL; 1178 } 1179 1180 fs->fs_ronly = ronly; 1181 /* Don't bump fs_clean if we're replaying journal */ 1182 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN))) 1183 if (ronly == 0) { 1184 fs->fs_clean <<= 1; 1185 fs->fs_fmod = 1; 1186 } 1187 bsize = fs->fs_cssize; 1188 blks = howmany(bsize, fs->fs_fsize); 1189 if (fs->fs_contigsumsize > 0) 1190 bsize += fs->fs_ncg * sizeof(int32_t); 1191 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1192 allocsbsize = bsize; 1193 space = kmem_alloc((u_long)allocsbsize, KM_SLEEP); 1194 fs->fs_csp = space; 1195 for (i = 0; i < blks; i += fs->fs_frag) { 1196 bsize = fs->fs_bsize; 1197 if (i + fs->fs_frag > blks) 1198 bsize = (blks - i) * fs->fs_fsize; 1199 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize, 1200 cred, 0, &bp); 1201 if (error) { 1202 kmem_free(fs->fs_csp, allocsbsize); 1203 goto out; 1204 } 1205 #ifdef FFS_EI 1206 if (needswap) 1207 ffs_csum_swap((struct csum *)bp->b_data, 1208 (struct csum *)space, bsize); 1209 else 1210 #endif 1211 memcpy(space, bp->b_data, (u_int)bsize); 1212 1213 space = (char *)space + bsize; 1214 brelse(bp, 0); 1215 bp = NULL; 1216 } 1217 if (fs->fs_contigsumsize > 0) { 1218 fs->fs_maxcluster = lp = space; 1219 for (i = 0; i < fs->fs_ncg; i++) 1220 *lp++ = fs->fs_contigsumsize; 1221 space = lp; 1222 } 1223 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1224 fs->fs_contigdirs = space; 1225 space = (char *)space + bsize; 1226 memset(fs->fs_contigdirs, 0, bsize); 1227 /* Compatibility for old filesystems - XXX */ 1228 if (fs->fs_avgfilesize <= 0) 1229 fs->fs_avgfilesize = AVFILESIZ; 1230 if (fs->fs_avgfpdir <= 0) 1231 fs->fs_avgfpdir = AFPDIR; 1232 fs->fs_active = NULL; 1233 mp->mnt_data = ump; 1234 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 1235 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS); 1236 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 1237 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN; 1238 if (UFS_MPISAPPLEUFS(ump)) { 1239 /* NeXT used to keep short symlinks in the inode even 1240 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen 1241 * is probably -1, but we still need to be able to identify 1242 * short symlinks. 1243 */ 1244 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN; 1245 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ; 1246 mp->mnt_iflag |= IMNT_DTYPE; 1247 } else { 1248 ump->um_maxsymlinklen = fs->fs_maxsymlinklen; 1249 ump->um_dirblksiz = DIRBLKSIZ; 1250 if (ump->um_maxsymlinklen > 0) 1251 mp->mnt_iflag |= IMNT_DTYPE; 1252 else 1253 mp->mnt_iflag &= ~IMNT_DTYPE; 1254 } 1255 mp->mnt_fs_bshift = fs->fs_bshift; 1256 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 1257 mp->mnt_flag |= MNT_LOCAL; 1258 mp->mnt_iflag |= IMNT_MPSAFE; 1259 #ifdef FFS_EI 1260 if (needswap) 1261 ump->um_flags |= UFS_NEEDSWAP; 1262 #endif 1263 ump->um_mountp = mp; 1264 ump->um_dev = dev; 1265 ump->um_devvp = devvp; 1266 ump->um_nindir = fs->fs_nindir; 1267 ump->um_lognindir = ffs(fs->fs_nindir) - 1; 1268 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT; 1269 ump->um_seqinc = fs->fs_frag; 1270 for (i = 0; i < MAXQUOTAS; i++) 1271 ump->um_quotas[i] = NULLVP; 1272 devvp->v_specmountpoint = mp; 1273 if (ronly == 0 && fs->fs_snapinum[0] != 0) 1274 ffs_snapshot_mount(mp); 1275 #ifdef WAPBL 1276 if (!ronly) { 1277 KDASSERT(fs->fs_ronly == 0); 1278 /* 1279 * ffs_wapbl_start() needs mp->mnt_stat initialised if it 1280 * needs to create a new log file in-filesystem. 1281 */ 1282 ffs_statvfs(mp, &mp->mnt_stat); 1283 1284 error = ffs_wapbl_start(mp); 1285 if (error) { 1286 kmem_free(fs->fs_csp, allocsbsize); 1287 goto out; 1288 } 1289 } 1290 #endif /* WAPBL */ 1291 if (ronly == 0) { 1292 #ifdef QUOTA2 1293 error = ffs_quota2_mount(mp); 1294 if (error) { 1295 kmem_free(fs->fs_csp, allocsbsize); 1296 goto out; 1297 } 1298 #else 1299 if (fs->fs_flags & FS_DOQUOTA2) { 1300 ump->um_flags |= UFS_QUOTA2; 1301 uprintf("%s: options QUOTA2 not enabled%s\n", 1302 mp->mnt_stat.f_mntonname, 1303 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting"); 1304 if ((mp->mnt_flag & MNT_FORCE) == 0) { 1305 error = EINVAL; 1306 kmem_free(fs->fs_csp, allocsbsize); 1307 goto out; 1308 } 1309 } 1310 #endif 1311 } 1312 #ifdef UFS_EXTATTR 1313 /* 1314 * Initialize file-backed extended attributes on UFS1 file 1315 * systems. 1316 */ 1317 if (ump->um_fstype == UFS1) 1318 ufs_extattr_uepm_init(&ump->um_extattr); 1319 #endif /* UFS_EXTATTR */ 1320 1321 return (0); 1322 out: 1323 #ifdef WAPBL 1324 if (mp->mnt_wapbl_replay) { 1325 wapbl_replay_stop(mp->mnt_wapbl_replay); 1326 wapbl_replay_free(mp->mnt_wapbl_replay); 1327 mp->mnt_wapbl_replay = 0; 1328 } 1329 #endif 1330 1331 fstrans_unmount(mp); 1332 if (fs) 1333 kmem_free(fs, fs->fs_sbsize); 1334 devvp->v_specmountpoint = NULL; 1335 if (bp) 1336 brelse(bp, bset); 1337 if (ump) { 1338 if (ump->um_oldfscompat) 1339 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t)); 1340 mutex_destroy(&ump->um_lock); 1341 kmem_free(ump, sizeof(*ump)); 1342 mp->mnt_data = NULL; 1343 } 1344 return (error); 1345 } 1346 1347 /* 1348 * Sanity checks for loading old filesystem superblocks. 1349 * See ffs_oldfscompat_write below for unwound actions. 1350 * 1351 * XXX - Parts get retired eventually. 1352 * Unfortunately new bits get added. 1353 */ 1354 static void 1355 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc) 1356 { 1357 off_t maxfilesize; 1358 int32_t *extrasave; 1359 1360 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1361 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1362 return; 1363 1364 if (!ump->um_oldfscompat) 1365 ump->um_oldfscompat = kmem_alloc(512 + 3*sizeof(int32_t), 1366 KM_SLEEP); 1367 1368 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512); 1369 extrasave = ump->um_oldfscompat; 1370 extrasave += 512/sizeof(int32_t); 1371 extrasave[0] = fs->fs_old_npsect; 1372 extrasave[1] = fs->fs_old_interleave; 1373 extrasave[2] = fs->fs_old_trackskew; 1374 1375 /* These fields will be overwritten by their 1376 * original values in fs_oldfscompat_write, so it is harmless 1377 * to modify them here. 1378 */ 1379 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; 1380 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; 1381 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; 1382 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; 1383 1384 fs->fs_maxbsize = fs->fs_bsize; 1385 fs->fs_time = fs->fs_old_time; 1386 fs->fs_size = fs->fs_old_size; 1387 fs->fs_dsize = fs->fs_old_dsize; 1388 fs->fs_csaddr = fs->fs_old_csaddr; 1389 fs->fs_sblockloc = sblockloc; 1390 1391 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL); 1392 1393 if (fs->fs_old_postblformat == FS_42POSTBLFMT) { 1394 fs->fs_old_nrpos = 8; 1395 fs->fs_old_npsect = fs->fs_old_nsect; 1396 fs->fs_old_interleave = 1; 1397 fs->fs_old_trackskew = 0; 1398 } 1399 1400 if (fs->fs_old_inodefmt < FS_44INODEFMT) { 1401 fs->fs_maxfilesize = (u_quad_t) 1LL << 39; 1402 fs->fs_qbmask = ~fs->fs_bmask; 1403 fs->fs_qfmask = ~fs->fs_fmask; 1404 } 1405 1406 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; 1407 if (fs->fs_maxfilesize > maxfilesize) 1408 fs->fs_maxfilesize = maxfilesize; 1409 1410 /* Compatibility for old filesystems */ 1411 if (fs->fs_avgfilesize <= 0) 1412 fs->fs_avgfilesize = AVFILESIZ; 1413 if (fs->fs_avgfpdir <= 0) 1414 fs->fs_avgfpdir = AFPDIR; 1415 1416 #if 0 1417 if (bigcgs) { 1418 fs->fs_save_cgsize = fs->fs_cgsize; 1419 fs->fs_cgsize = fs->fs_bsize; 1420 } 1421 #endif 1422 } 1423 1424 /* 1425 * Unwinding superblock updates for old filesystems. 1426 * See ffs_oldfscompat_read above for details. 1427 * 1428 * XXX - Parts get retired eventually. 1429 * Unfortunately new bits get added. 1430 */ 1431 static void 1432 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump) 1433 { 1434 int32_t *extrasave; 1435 1436 if ((fs->fs_magic != FS_UFS1_MAGIC) || 1437 (fs->fs_old_flags & FS_FLAGS_UPDATED)) 1438 return; 1439 1440 fs->fs_old_time = fs->fs_time; 1441 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; 1442 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; 1443 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; 1444 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; 1445 fs->fs_old_flags = fs->fs_flags; 1446 1447 #if 0 1448 if (bigcgs) { 1449 fs->fs_cgsize = fs->fs_save_cgsize; 1450 } 1451 #endif 1452 1453 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512); 1454 extrasave = ump->um_oldfscompat; 1455 extrasave += 512/sizeof(int32_t); 1456 fs->fs_old_npsect = extrasave[0]; 1457 fs->fs_old_interleave = extrasave[1]; 1458 fs->fs_old_trackskew = extrasave[2]; 1459 1460 } 1461 1462 /* 1463 * unmount vfs operation 1464 */ 1465 int 1466 ffs_unmount(struct mount *mp, int mntflags) 1467 { 1468 struct lwp *l = curlwp; 1469 struct ufsmount *ump = VFSTOUFS(mp); 1470 struct fs *fs = ump->um_fs; 1471 int error, flags; 1472 u_int32_t bsize; 1473 #ifdef WAPBL 1474 extern int doforce; 1475 #endif 1476 1477 flags = 0; 1478 if (mntflags & MNT_FORCE) 1479 flags |= FORCECLOSE; 1480 if ((error = ffs_flushfiles(mp, flags, l)) != 0) 1481 return (error); 1482 error = UFS_WAPBL_BEGIN(mp); 1483 if (error == 0) 1484 if (fs->fs_ronly == 0 && 1485 ffs_cgupdate(ump, MNT_WAIT) == 0 && 1486 fs->fs_clean & FS_WASCLEAN) { 1487 fs->fs_clean = FS_ISCLEAN; 1488 fs->fs_fmod = 0; 1489 (void) ffs_sbupdate(ump, MNT_WAIT); 1490 } 1491 if (error == 0) 1492 UFS_WAPBL_END(mp); 1493 #ifdef WAPBL 1494 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl)); 1495 if (mp->mnt_wapbl_replay) { 1496 KDASSERT(fs->fs_ronly); 1497 wapbl_replay_stop(mp->mnt_wapbl_replay); 1498 wapbl_replay_free(mp->mnt_wapbl_replay); 1499 mp->mnt_wapbl_replay = 0; 1500 } 1501 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE)); 1502 if (error) { 1503 return error; 1504 } 1505 #endif /* WAPBL */ 1506 1507 if (ump->um_devvp->v_type != VBAD) 1508 ump->um_devvp->v_specmountpoint = NULL; 1509 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1510 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE, 1511 NOCRED); 1512 vput(ump->um_devvp); 1513 1514 bsize = fs->fs_cssize; 1515 if (fs->fs_contigsumsize > 0) 1516 bsize += fs->fs_ncg * sizeof(int32_t); 1517 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs); 1518 kmem_free(fs->fs_csp, bsize); 1519 1520 kmem_free(fs, fs->fs_sbsize); 1521 if (ump->um_oldfscompat != NULL) 1522 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t)); 1523 mutex_destroy(&ump->um_lock); 1524 ffs_snapshot_fini(ump); 1525 kmem_free(ump, sizeof(*ump)); 1526 mp->mnt_data = NULL; 1527 mp->mnt_flag &= ~MNT_LOCAL; 1528 fstrans_unmount(mp); 1529 return (0); 1530 } 1531 1532 /* 1533 * Flush out all the files in a filesystem. 1534 */ 1535 int 1536 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l) 1537 { 1538 extern int doforce; 1539 struct ufsmount *ump; 1540 int error; 1541 1542 if (!doforce) 1543 flags &= ~FORCECLOSE; 1544 ump = VFSTOUFS(mp); 1545 #ifdef QUOTA 1546 if ((error = quota1_umount(mp, flags)) != 0) 1547 return (error); 1548 #endif 1549 #ifdef QUOTA2 1550 if ((error = quota2_umount(mp, flags)) != 0) 1551 return (error); 1552 #endif 1553 #ifdef UFS_EXTATTR 1554 if (ump->um_fstype == UFS1) { 1555 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_STARTED) 1556 ufs_extattr_stop(mp, l); 1557 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_INITIALIZED) 1558 ufs_extattr_uepm_destroy(&ump->um_extattr); 1559 } 1560 #endif 1561 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) 1562 return (error); 1563 ffs_snapshot_unmount(mp); 1564 /* 1565 * Flush all the files. 1566 */ 1567 error = vflush(mp, NULLVP, flags); 1568 if (error) 1569 return (error); 1570 /* 1571 * Flush filesystem metadata. 1572 */ 1573 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1574 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0); 1575 VOP_UNLOCK(ump->um_devvp); 1576 if (flags & FORCECLOSE) /* XXXDBJ */ 1577 error = 0; 1578 1579 #ifdef WAPBL 1580 if (error) 1581 return error; 1582 if (mp->mnt_wapbl) { 1583 error = wapbl_flush(mp->mnt_wapbl, 1); 1584 if (flags & FORCECLOSE) 1585 error = 0; 1586 } 1587 #endif 1588 1589 return (error); 1590 } 1591 1592 /* 1593 * Get file system statistics. 1594 */ 1595 int 1596 ffs_statvfs(struct mount *mp, struct statvfs *sbp) 1597 { 1598 struct ufsmount *ump; 1599 struct fs *fs; 1600 1601 ump = VFSTOUFS(mp); 1602 fs = ump->um_fs; 1603 mutex_enter(&ump->um_lock); 1604 sbp->f_bsize = fs->fs_bsize; 1605 sbp->f_frsize = fs->fs_fsize; 1606 sbp->f_iosize = fs->fs_bsize; 1607 sbp->f_blocks = fs->fs_dsize; 1608 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) + 1609 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); 1610 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t) 1611 fs->fs_minfree) / (u_int64_t) 100; 1612 if (sbp->f_bfree > sbp->f_bresvd) 1613 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 1614 else 1615 sbp->f_bavail = 0; 1616 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; 1617 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; 1618 sbp->f_favail = sbp->f_ffree; 1619 sbp->f_fresvd = 0; 1620 mutex_exit(&ump->um_lock); 1621 copy_statvfs_info(sbp, mp); 1622 1623 return (0); 1624 } 1625 1626 /* 1627 * Go through the disk queues to initiate sandbagged IO; 1628 * go through the inodes to write those that have been modified; 1629 * initiate the writing of the super block if it has been modified. 1630 * 1631 * Note: we are always called with the filesystem marked `MPBUSY'. 1632 */ 1633 int 1634 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 1635 { 1636 struct vnode *vp, *mvp, *nvp; 1637 struct inode *ip; 1638 struct ufsmount *ump = VFSTOUFS(mp); 1639 struct fs *fs; 1640 int error, allerror = 0; 1641 bool is_suspending; 1642 1643 fs = ump->um_fs; 1644 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ 1645 printf("fs = %s\n", fs->fs_fsmnt); 1646 panic("update: rofs mod"); 1647 } 1648 1649 /* Allocate a marker vnode. */ 1650 mvp = vnalloc(mp); 1651 1652 fstrans_start(mp, FSTRANS_SHARED); 1653 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING); 1654 /* 1655 * Write back each (modified) inode. 1656 */ 1657 mutex_enter(&mntvnode_lock); 1658 loop: 1659 /* 1660 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 1661 * and vclean() can be called indirectly 1662 */ 1663 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) { 1664 nvp = TAILQ_NEXT(vp, v_mntvnodes); 1665 /* 1666 * If the vnode that we are about to sync is no longer 1667 * associated with this mount point, start over. 1668 */ 1669 if (vp->v_mount != mp) 1670 goto loop; 1671 /* 1672 * Don't interfere with concurrent scans of this FS. 1673 */ 1674 if (vismarker(vp)) 1675 continue; 1676 mutex_enter(vp->v_interlock); 1677 ip = VTOI(vp); 1678 1679 /* 1680 * Skip the vnode/inode if inaccessible. 1681 */ 1682 if (ip == NULL || (vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0 || 1683 vp->v_type == VNON) { 1684 mutex_exit(vp->v_interlock); 1685 continue; 1686 } 1687 1688 /* 1689 * We deliberately update inode times here. This will 1690 * prevent a massive queue of updates accumulating, only 1691 * to be handled by a call to unmount. 1692 * 1693 * XXX It would be better to have the syncer trickle these 1694 * out. Adjustment needed to allow registering vnodes for 1695 * sync when the vnode is clean, but the inode dirty. Or 1696 * have ufs itself trickle out inode updates. 1697 * 1698 * If doing a lazy sync, we don't care about metadata or 1699 * data updates, because they are handled by each vnode's 1700 * synclist entry. In this case we are only interested in 1701 * writing back modified inodes. 1702 */ 1703 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | 1704 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 && 1705 (waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) && 1706 UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) { 1707 mutex_exit(vp->v_interlock); 1708 continue; 1709 } 1710 if (vp->v_type == VBLK && is_suspending) { 1711 mutex_exit(vp->v_interlock); 1712 continue; 1713 } 1714 vmark(mvp, vp); 1715 mutex_exit(&mntvnode_lock); 1716 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT); 1717 if (error) { 1718 mutex_enter(&mntvnode_lock); 1719 nvp = vunmark(mvp); 1720 if (error == ENOENT) { 1721 goto loop; 1722 } 1723 continue; 1724 } 1725 if (waitfor == MNT_LAZY) { 1726 error = UFS_WAPBL_BEGIN(vp->v_mount); 1727 if (!error) { 1728 error = ffs_update(vp, NULL, NULL, 1729 UPDATE_CLOSE); 1730 UFS_WAPBL_END(vp->v_mount); 1731 } 1732 } else { 1733 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG | 1734 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0); 1735 } 1736 if (error) 1737 allerror = error; 1738 vput(vp); 1739 mutex_enter(&mntvnode_lock); 1740 nvp = vunmark(mvp); 1741 } 1742 mutex_exit(&mntvnode_lock); 1743 /* 1744 * Force stale file system control information to be flushed. 1745 */ 1746 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 || 1747 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) { 1748 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 1749 if ((error = VOP_FSYNC(ump->um_devvp, cred, 1750 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG, 1751 0, 0)) != 0) 1752 allerror = error; 1753 VOP_UNLOCK(ump->um_devvp); 1754 if (allerror == 0 && waitfor == MNT_WAIT && !mp->mnt_wapbl) { 1755 mutex_enter(&mntvnode_lock); 1756 goto loop; 1757 } 1758 } 1759 #if defined(QUOTA) || defined(QUOTA2) 1760 qsync(mp); 1761 #endif 1762 /* 1763 * Write back modified superblock. 1764 */ 1765 if (fs->fs_fmod != 0) { 1766 fs->fs_fmod = 0; 1767 fs->fs_time = time_second; 1768 error = UFS_WAPBL_BEGIN(mp); 1769 if (error) 1770 allerror = error; 1771 else { 1772 if ((error = ffs_cgupdate(ump, waitfor))) 1773 allerror = error; 1774 UFS_WAPBL_END(mp); 1775 } 1776 } 1777 1778 #ifdef WAPBL 1779 if (mp->mnt_wapbl) { 1780 error = wapbl_flush(mp->mnt_wapbl, 0); 1781 if (error) 1782 allerror = error; 1783 } 1784 #endif 1785 1786 fstrans_done(mp); 1787 vnfree(mvp); 1788 return (allerror); 1789 } 1790 1791 /* 1792 * Look up a FFS dinode number to find its incore vnode, otherwise read it 1793 * in from disk. If it is in core, wait for the lock bit to clear, then 1794 * return the inode locked. Detection and handling of mount points must be 1795 * done by the calling routine. 1796 */ 1797 int 1798 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1799 { 1800 struct fs *fs; 1801 struct inode *ip; 1802 struct ufsmount *ump; 1803 struct buf *bp; 1804 struct vnode *vp; 1805 dev_t dev; 1806 int error; 1807 1808 ump = VFSTOUFS(mp); 1809 dev = ump->um_dev; 1810 1811 retry: 1812 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1813 return (0); 1814 1815 /* Allocate a new vnode/inode. */ 1816 error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, NULL, &vp); 1817 if (error) { 1818 *vpp = NULL; 1819 return (error); 1820 } 1821 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK); 1822 1823 /* 1824 * If someone beat us to it, put back the freshly allocated 1825 * vnode/inode pair and retry. 1826 */ 1827 mutex_enter(&ufs_hashlock); 1828 if (ufs_ihashget(dev, ino, 0) != NULL) { 1829 mutex_exit(&ufs_hashlock); 1830 ungetnewvnode(vp); 1831 pool_cache_put(ffs_inode_cache, ip); 1832 goto retry; 1833 } 1834 1835 vp->v_vflag |= VV_LOCKSWORK; 1836 1837 /* 1838 * XXX MFS ends up here, too, to allocate an inode. Should we 1839 * XXX create another pool for MFS inodes? 1840 */ 1841 1842 memset(ip, 0, sizeof(struct inode)); 1843 vp->v_data = ip; 1844 ip->i_vnode = vp; 1845 ip->i_ump = ump; 1846 ip->i_fs = fs = ump->um_fs; 1847 ip->i_dev = dev; 1848 ip->i_number = ino; 1849 #if defined(QUOTA) || defined(QUOTA2) 1850 ufsquota_init(ip); 1851 #endif 1852 1853 /* 1854 * Initialize genfs node, we might proceed to destroy it in 1855 * error branches. 1856 */ 1857 genfs_node_init(vp, &ffs_genfsops); 1858 1859 /* 1860 * Put it onto its hash chain and lock it so that other requests for 1861 * this inode will block if they arrive while we are sleeping waiting 1862 * for old data structures to be purged or for the contents of the 1863 * disk portion of this inode to be read. 1864 */ 1865 1866 ufs_ihashins(ip); 1867 mutex_exit(&ufs_hashlock); 1868 1869 /* Read in the disk contents for the inode, copy into the inode. */ 1870 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1871 (int)fs->fs_bsize, NOCRED, 0, &bp); 1872 if (error) { 1873 1874 /* 1875 * The inode does not contain anything useful, so it would 1876 * be misleading to leave it on its hash chain. With mode 1877 * still zero, it will be unlinked and returned to the free 1878 * list by vput(). 1879 */ 1880 1881 vput(vp); 1882 brelse(bp, 0); 1883 *vpp = NULL; 1884 return (error); 1885 } 1886 if (ip->i_ump->um_fstype == UFS1) 1887 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache, 1888 PR_WAITOK); 1889 else 1890 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache, 1891 PR_WAITOK); 1892 ffs_load_inode(bp, ip, fs, ino); 1893 brelse(bp, 0); 1894 1895 /* 1896 * Initialize the vnode from the inode, check for aliases. 1897 * Note that the underlying vnode may have changed. 1898 */ 1899 1900 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp); 1901 1902 /* 1903 * Finish inode initialization now that aliasing has been resolved. 1904 */ 1905 1906 ip->i_devvp = ump->um_devvp; 1907 vref(ip->i_devvp); 1908 1909 /* 1910 * Ensure that uid and gid are correct. This is a temporary 1911 * fix until fsck has been changed to do the update. 1912 */ 1913 1914 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */ 1915 ip->i_uid = ip->i_ffs1_ouid; /* XXX */ 1916 ip->i_gid = ip->i_ffs1_ogid; /* XXX */ 1917 } /* XXX */ 1918 uvm_vnp_setsize(vp, ip->i_size); 1919 *vpp = vp; 1920 return (0); 1921 } 1922 1923 /* 1924 * File handle to vnode 1925 * 1926 * Have to be really careful about stale file handles: 1927 * - check that the inode number is valid 1928 * - call ffs_vget() to get the locked inode 1929 * - check for an unallocated inode (i_mode == 0) 1930 * - check that the given client host has export rights and return 1931 * those rights via. exflagsp and credanonp 1932 */ 1933 int 1934 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1935 { 1936 struct ufid ufh; 1937 struct fs *fs; 1938 1939 if (fhp->fid_len != sizeof(struct ufid)) 1940 return EINVAL; 1941 1942 memcpy(&ufh, fhp, sizeof(ufh)); 1943 fs = VFSTOUFS(mp)->um_fs; 1944 if (ufh.ufid_ino < ROOTINO || 1945 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg) 1946 return (ESTALE); 1947 return (ufs_fhtovp(mp, &ufh, vpp)); 1948 } 1949 1950 /* 1951 * Vnode pointer to File handle 1952 */ 1953 /* ARGSUSED */ 1954 int 1955 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1956 { 1957 struct inode *ip; 1958 struct ufid ufh; 1959 1960 if (*fh_size < sizeof(struct ufid)) { 1961 *fh_size = sizeof(struct ufid); 1962 return E2BIG; 1963 } 1964 ip = VTOI(vp); 1965 *fh_size = sizeof(struct ufid); 1966 memset(&ufh, 0, sizeof(ufh)); 1967 ufh.ufid_len = sizeof(struct ufid); 1968 ufh.ufid_ino = ip->i_number; 1969 ufh.ufid_gen = ip->i_gen; 1970 memcpy(fhp, &ufh, sizeof(ufh)); 1971 return (0); 1972 } 1973 1974 void 1975 ffs_init(void) 1976 { 1977 if (ffs_initcount++ > 0) 1978 return; 1979 1980 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0, 1981 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL); 1982 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0, 1983 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL); 1984 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0, 1985 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL); 1986 ufs_init(); 1987 } 1988 1989 void 1990 ffs_reinit(void) 1991 { 1992 1993 ufs_reinit(); 1994 } 1995 1996 void 1997 ffs_done(void) 1998 { 1999 if (--ffs_initcount > 0) 2000 return; 2001 2002 ufs_done(); 2003 pool_cache_destroy(ffs_dinode2_cache); 2004 pool_cache_destroy(ffs_dinode1_cache); 2005 pool_cache_destroy(ffs_inode_cache); 2006 } 2007 2008 /* 2009 * Write a superblock and associated information back to disk. 2010 */ 2011 int 2012 ffs_sbupdate(struct ufsmount *mp, int waitfor) 2013 { 2014 struct fs *fs = mp->um_fs; 2015 struct buf *bp; 2016 int error = 0; 2017 u_int32_t saveflag; 2018 2019 error = ffs_getblk(mp->um_devvp, 2020 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK, 2021 fs->fs_sbsize, false, &bp); 2022 if (error) 2023 return error; 2024 saveflag = fs->fs_flags & FS_INTERNAL; 2025 fs->fs_flags &= ~FS_INTERNAL; 2026 2027 memcpy(bp->b_data, fs, fs->fs_sbsize); 2028 2029 ffs_oldfscompat_write((struct fs *)bp->b_data, mp); 2030 #ifdef FFS_EI 2031 if (mp->um_flags & UFS_NEEDSWAP) 2032 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data); 2033 #endif 2034 fs->fs_flags |= saveflag; 2035 2036 if (waitfor == MNT_WAIT) 2037 error = bwrite(bp); 2038 else 2039 bawrite(bp); 2040 return (error); 2041 } 2042 2043 int 2044 ffs_cgupdate(struct ufsmount *mp, int waitfor) 2045 { 2046 struct fs *fs = mp->um_fs; 2047 struct buf *bp; 2048 int blks; 2049 void *space; 2050 int i, size, error = 0, allerror = 0; 2051 2052 allerror = ffs_sbupdate(mp, waitfor); 2053 blks = howmany(fs->fs_cssize, fs->fs_fsize); 2054 space = fs->fs_csp; 2055 for (i = 0; i < blks; i += fs->fs_frag) { 2056 size = fs->fs_bsize; 2057 if (i + fs->fs_frag > blks) 2058 size = (blks - i) * fs->fs_fsize; 2059 error = ffs_getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), 2060 FFS_NOBLK, size, false, &bp); 2061 if (error) 2062 break; 2063 #ifdef FFS_EI 2064 if (mp->um_flags & UFS_NEEDSWAP) 2065 ffs_csum_swap((struct csum*)space, 2066 (struct csum*)bp->b_data, size); 2067 else 2068 #endif 2069 memcpy(bp->b_data, space, (u_int)size); 2070 space = (char *)space + size; 2071 if (waitfor == MNT_WAIT) 2072 error = bwrite(bp); 2073 else 2074 bawrite(bp); 2075 } 2076 if (!allerror && error) 2077 allerror = error; 2078 return (allerror); 2079 } 2080 2081 int 2082 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 2083 int attrnamespace, const char *attrname) 2084 { 2085 #ifdef UFS_EXTATTR 2086 /* 2087 * File-backed extended attributes are only supported on UFS1. 2088 * UFS2 has native extended attributes. 2089 */ 2090 if (VFSTOUFS(mp)->um_fstype == UFS1) 2091 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname)); 2092 #endif 2093 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname)); 2094 } 2095 2096 int 2097 ffs_suspendctl(struct mount *mp, int cmd) 2098 { 2099 int error; 2100 struct lwp *l = curlwp; 2101 2102 switch (cmd) { 2103 case SUSPEND_SUSPEND: 2104 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0) 2105 return error; 2106 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred); 2107 if (error == 0) 2108 error = fstrans_setstate(mp, FSTRANS_SUSPENDED); 2109 #ifdef WAPBL 2110 if (error == 0 && mp->mnt_wapbl) 2111 error = wapbl_flush(mp->mnt_wapbl, 1); 2112 #endif 2113 if (error != 0) { 2114 (void) fstrans_setstate(mp, FSTRANS_NORMAL); 2115 return error; 2116 } 2117 return 0; 2118 2119 case SUSPEND_RESUME: 2120 return fstrans_setstate(mp, FSTRANS_NORMAL); 2121 2122 default: 2123 return EINVAL; 2124 } 2125 } 2126 2127 /* 2128 * Synch vnode for a mounted file system. 2129 */ 2130 static int 2131 ffs_vfs_fsync(vnode_t *vp, int flags) 2132 { 2133 int error, i, pflags; 2134 #ifdef WAPBL 2135 struct mount *mp; 2136 #endif 2137 2138 KASSERT(vp->v_type == VBLK); 2139 KASSERT(vp->v_specmountpoint != NULL); 2140 2141 /* 2142 * Flush all dirty data associated with the vnode. 2143 */ 2144 pflags = PGO_ALLPAGES | PGO_CLEANIT; 2145 if ((flags & FSYNC_WAIT) != 0) 2146 pflags |= PGO_SYNCIO; 2147 mutex_enter(vp->v_interlock); 2148 error = VOP_PUTPAGES(vp, 0, 0, pflags); 2149 if (error) 2150 return error; 2151 2152 #ifdef WAPBL 2153 mp = vp->v_specmountpoint; 2154 if (mp && mp->mnt_wapbl) { 2155 /* 2156 * Don't bother writing out metadata if the syncer is 2157 * making the request. We will let the sync vnode 2158 * write it out in a single burst through a call to 2159 * VFS_SYNC(). 2160 */ 2161 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0) 2162 return 0; 2163 2164 /* 2165 * Don't flush the log if the vnode being flushed 2166 * contains no dirty buffers that could be in the log. 2167 */ 2168 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 2169 error = wapbl_flush(mp->mnt_wapbl, 0); 2170 if (error) 2171 return error; 2172 } 2173 2174 if ((flags & FSYNC_WAIT) != 0) { 2175 mutex_enter(vp->v_interlock); 2176 while (vp->v_numoutput) 2177 cv_wait(&vp->v_cv, vp->v_interlock); 2178 mutex_exit(vp->v_interlock); 2179 } 2180 2181 return 0; 2182 } 2183 #endif /* WAPBL */ 2184 2185 error = vflushbuf(vp, flags); 2186 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 2187 i = 1; 2188 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, 2189 kauth_cred_get()); 2190 } 2191 2192 return error; 2193 } 2194
Indexes created Sat Oct 18 17:09:52 GMT 2025