1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 #include <sys/types.h> 43 #include <sys/t_lock.h> 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/bitmap.h> 47 #include <sys/sysmacros.h> 48 #include <sys/kmem.h> 49 #include <sys/signal.h> 50 #include <sys/user.h> 51 #include <sys/proc.h> 52 #include <sys/disp.h> 53 #include <sys/buf.h> 54 #include <sys/pathname.h> 55 #include <sys/vfs.h> 56 #include <sys/vfs_opreg.h> 57 #include <sys/vnode.h> 58 #include <sys/file.h> 59 #include <sys/atomic.h> 60 #include <sys/uio.h> 61 #include <sys/dkio.h> 62 #include <sys/cred.h> 63 #include <sys/conf.h> 64 #include <sys/dnlc.h> 65 #include <sys/kstat.h> 66 #include <sys/acl.h> 67 #include <sys/fs/ufs_fsdir.h> 68 #include <sys/fs/ufs_fs.h> 69 #include <sys/fs/ufs_inode.h> 70 #include <sys/fs/ufs_mount.h> 71 #include <sys/fs/ufs_acl.h> 72 #include <sys/fs/ufs_panic.h> 73 #include <sys/fs/ufs_bio.h> 74 #include <sys/fs/ufs_quota.h> 75 #include <sys/fs/ufs_log.h> 76 #undef NFS 77 #include <sys/statvfs.h> 78 #include <sys/mount.h> 79 #include <sys/mntent.h> 80 #include <sys/swap.h> 81 #include <sys/errno.h> 82 #include <sys/debug.h> 83 #include "fs/fs_subr.h" 84 #include <sys/cmn_err.h> 85 #include <sys/dnlc.h> 86 #include <sys/fssnap_if.h> 87 #include <sys/sunddi.h> 88 #include <sys/bootconf.h> 89 #include <sys/policy.h> 90 #include <sys/zone.h> 91 92 /* 93 * This is the loadable module wrapper. 94 */ 95 #include <sys/modctl.h> 96 97 int ufsfstype; 98 vfsops_t *ufs_vfsops; 99 static int ufsinit(int, char *); 100 static int mountfs(); 101 extern int highbit(); 102 extern struct instats ins; 103 extern struct vnode *common_specvp(struct vnode *vp); 104 extern vfs_t EIO_vfs; 105 106 struct dquot *dquot, *dquotNDQUOT; 107 108 /* 109 * Cylinder group summary information handling tunable. 110 * This defines when these deltas get logged. 111 * If the number of cylinders in the file system is over the 112 * tunable then we log csum updates. Otherwise the updates are only 113 * done for performance on unmount. After a panic they can be 114 * quickly constructed during mounting. See ufs_construct_si() 115 * called from ufs_getsummaryinfo(). 116 * 117 * This performance feature can of course be disabled by setting 118 * ufs_ncg_log to 0, and fully enabled by setting it to 0xffffffff. 119 */ 120 #define UFS_LOG_NCG_DEFAULT 10000 121 uint32_t ufs_ncg_log = UFS_LOG_NCG_DEFAULT; 122 123 /* 124 * ufs_clean_root indicates whether the root fs went down cleanly 125 */ 126 static int ufs_clean_root = 0; 127 128 /* 129 * UFS Mount options table 130 */ 131 static char *intr_cancel[] = { MNTOPT_NOINTR, NULL }; 132 static char *nointr_cancel[] = { MNTOPT_INTR, NULL }; 133 static char *forcedirectio_cancel[] = { MNTOPT_NOFORCEDIRECTIO, NULL }; 134 static char *noforcedirectio_cancel[] = { MNTOPT_FORCEDIRECTIO, NULL }; 135 static char *largefiles_cancel[] = { MNTOPT_NOLARGEFILES, NULL }; 136 static char *nolargefiles_cancel[] = { MNTOPT_LARGEFILES, NULL }; 137 static char *logging_cancel[] = { MNTOPT_NOLOGGING, NULL }; 138 static char *nologging_cancel[] = { MNTOPT_LOGGING, NULL }; 139 static char *xattr_cancel[] = { MNTOPT_NOXATTR, NULL }; 140 static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL }; 141 static char *quota_cancel[] = { MNTOPT_NOQUOTA, NULL }; 142 static char *noquota_cancel[] = { MNTOPT_QUOTA, NULL }; 143 static char *dfratime_cancel[] = { MNTOPT_NODFRATIME, NULL }; 144 static char *nodfratime_cancel[] = { MNTOPT_DFRATIME, NULL }; 145 146 static mntopt_t mntopts[] = { 147 /* 148 * option name cancel option default arg flags 149 * ufs arg flag 150 */ 151 { MNTOPT_INTR, intr_cancel, NULL, MO_DEFAULT, 152 (void *)0 }, 153 { MNTOPT_NOINTR, nointr_cancel, NULL, 0, 154 (void *)UFSMNT_NOINTR }, 155 { MNTOPT_SYNCDIR, NULL, NULL, 0, 156 (void *)UFSMNT_SYNCDIR }, 157 { MNTOPT_FORCEDIRECTIO, forcedirectio_cancel, NULL, 0, 158 (void *)UFSMNT_FORCEDIRECTIO }, 159 { MNTOPT_NOFORCEDIRECTIO, noforcedirectio_cancel, NULL, 0, 160 (void *)UFSMNT_NOFORCEDIRECTIO }, 161 { MNTOPT_NOSETSEC, NULL, NULL, 0, 162 (void *)UFSMNT_NOSETSEC }, 163 { MNTOPT_LARGEFILES, largefiles_cancel, NULL, MO_DEFAULT, 164 (void *)UFSMNT_LARGEFILES }, 165 { MNTOPT_NOLARGEFILES, nolargefiles_cancel, NULL, 0, 166 (void *)0 }, 167 { MNTOPT_LOGGING, logging_cancel, NULL, MO_TAG, 168 (void *)UFSMNT_LOGGING }, 169 { MNTOPT_NOLOGGING, nologging_cancel, NULL, 170 MO_NODISPLAY|MO_DEFAULT|MO_TAG, (void *)0 }, 171 { MNTOPT_QUOTA, quota_cancel, NULL, MO_IGNORE, 172 (void *)0 }, 173 { MNTOPT_NOQUOTA, noquota_cancel, NULL, 174 MO_NODISPLAY|MO_DEFAULT, (void *)0 }, 175 { MNTOPT_GLOBAL, NULL, NULL, 0, 176 (void *)0 }, 177 { MNTOPT_XATTR, xattr_cancel, NULL, MO_DEFAULT, 178 (void *)0 }, 179 { MNTOPT_NOXATTR, noxattr_cancel, NULL, 0, 180 (void *)0 }, 181 { MNTOPT_NOATIME, NULL, NULL, 0, 182 (void *)UFSMNT_NOATIME }, 183 { MNTOPT_DFRATIME, dfratime_cancel, NULL, 0, 184 (void *)0 }, 185 { MNTOPT_NODFRATIME, nodfratime_cancel, NULL, 186 MO_NODISPLAY|MO_DEFAULT, (void *)UFSMNT_NODFRATIME }, 187 { MNTOPT_ONERROR, NULL, UFSMNT_ONERROR_PANIC_STR, 188 MO_DEFAULT|MO_HASVALUE, (void *)0 }, 189 }; 190 191 static mntopts_t ufs_mntopts = { 192 sizeof (mntopts) / sizeof (mntopt_t), 193 mntopts 194 }; 195 196 static vfsdef_t vfw = { 197 VFSDEF_VERSION, 198 "ufs", 199 ufsinit, 200 VSW_HASPROTO|VSW_CANREMOUNT|VSW_STATS|VSW_CANLOFI, 201 &ufs_mntopts 202 }; 203 204 /* 205 * Module linkage information for the kernel. 206 */ 207 extern struct mod_ops mod_fsops; 208 209 static struct modlfs modlfs = { 210 &mod_fsops, "filesystem for ufs", &vfw 211 }; 212 213 static struct modlinkage modlinkage = { 214 MODREV_1, (void *)&modlfs, NULL 215 }; 216 217 /* 218 * An attempt has been made to make this module unloadable. In order to 219 * test it, we need a system in which the root fs is NOT ufs. THIS HAS NOT 220 * BEEN DONE 221 */ 222 223 extern kstat_t *ufs_inode_kstat; 224 extern uint_t ufs_lockfs_key; 225 extern void ufs_lockfs_tsd_destructor(void *); 226 extern uint_t bypass_snapshot_throttle_key; 227 228 int 229 _init(void) 230 { 231 /* 232 * Create an index into the per thread array so that any thread doing 233 * VOP will have a lockfs mark on it. 234 */ 235 tsd_create(&ufs_lockfs_key, ufs_lockfs_tsd_destructor); 236 tsd_create(&bypass_snapshot_throttle_key, NULL); 237 return (mod_install(&modlinkage)); 238 } 239 240 int 241 _fini(void) 242 { 243 return (EBUSY); 244 } 245 246 int 247 _info(struct modinfo *modinfop) 248 { 249 return (mod_info(&modlinkage, modinfop)); 250 } 251 252 extern struct vnode *makespecvp(dev_t dev, vtype_t type); 253 254 extern kmutex_t ufs_scan_lock; 255 256 static int mountfs(struct vfs *, enum whymountroot, struct vnode *, char *, 257 struct cred *, int, void *, int); 258 259 260 static int 261 ufs_mount(struct vfs *vfsp, struct vnode *mvp, struct mounta *uap, 262 struct cred *cr) 263 264 { 265 char *data = uap->dataptr; 266 int datalen = uap->datalen; 267 dev_t dev; 268 struct vnode *lvp = NULL; 269 struct vnode *svp = NULL; 270 struct pathname dpn; 271 int error; 272 enum whymountroot why = ROOT_INIT; 273 struct ufs_args args; 274 int oflag, aflag; 275 int fromspace = (uap->flags & MS_SYSSPACE) ? 276 UIO_SYSSPACE : UIO_USERSPACE; 277 278 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) 279 return (error); 280 281 if (mvp->v_type != VDIR) 282 return (ENOTDIR); 283 284 mutex_enter(&mvp->v_lock); 285 if ((uap->flags & MS_REMOUNT) == 0 && 286 (uap->flags & MS_OVERLAY) == 0 && 287 (mvp->v_count != 1 || (mvp->v_flag & VROOT))) { 288 mutex_exit(&mvp->v_lock); 289 return (EBUSY); 290 } 291 mutex_exit(&mvp->v_lock); 292 293 /* 294 * Get arguments 295 */ 296 bzero(&args, sizeof (args)); 297 if ((uap->flags & MS_DATA) && data != NULL && datalen != 0) { 298 int copy_result = 0; 299 300 if (datalen > sizeof (args)) 301 return (EINVAL); 302 if (uap->flags & MS_SYSSPACE) 303 bcopy(data, &args, datalen); 304 else 305 copy_result = copyin(data, &args, datalen); 306 if (copy_result) 307 return (EFAULT); 308 datalen = sizeof (struct ufs_args); 309 } else { 310 datalen = 0; 311 } 312 313 if ((vfsp->vfs_flag & VFS_RDONLY) != 0 || 314 (uap->flags & MS_RDONLY) != 0) { 315 oflag = FREAD; 316 aflag = VREAD; 317 } else { 318 oflag = FREAD | FWRITE; 319 aflag = VREAD | VWRITE; 320 } 321 322 /* 323 * Read in the mount point pathname 324 * (so we can record the directory the file system was last mounted on). 325 */ 326 if (error = pn_get(uap->dir, fromspace, &dpn)) 327 return (error); 328 329 /* 330 * Resolve path name of special file being mounted. 331 */ 332 if (error = lookupname(uap->spec, fromspace, FOLLOW, NULL, &svp)) { 333 pn_free(&dpn); 334 return (error); 335 } 336 337 error = vfs_get_lofi(vfsp, &lvp); 338 339 if (error > 0) { 340 VN_RELE(svp); 341 pn_free(&dpn); 342 return (error); 343 } else if (error == 0) { 344 dev = lvp->v_rdev; 345 346 if (getmajor(dev) >= devcnt) { 347 error = ENXIO; 348 goto out; 349 } 350 } else { 351 dev = svp->v_rdev; 352 353 if (svp->v_type != VBLK) { 354 VN_RELE(svp); 355 pn_free(&dpn); 356 return (ENOTBLK); 357 } 358 359 if (getmajor(dev) >= devcnt) { 360 error = ENXIO; 361 goto out; 362 } 363 364 /* 365 * In SunCluster, requests to a global device are 366 * satisfied by a local device. We substitute the global 367 * pxfs node with a local spec node here. 368 */ 369 if (IS_PXFSVP(svp)) { 370 ASSERT(lvp == NULL); 371 VN_RELE(svp); 372 svp = makespecvp(dev, VBLK); 373 } 374 375 if ((error = secpolicy_spec_open(cr, svp, oflag)) != 0) { 376 VN_RELE(svp); 377 pn_free(&dpn); 378 return (error); 379 } 380 } 381 382 if (uap->flags & MS_REMOUNT) 383 why = ROOT_REMOUNT; 384 385 /* 386 * Open device/file mounted on. We need this to check whether 387 * the caller has sufficient rights to access the resource in 388 * question. When bio is fixed for vnodes this can all be vnode 389 * operations. 390 */ 391 if ((error = VOP_ACCESS(svp, aflag, 0, cr, NULL)) != 0) 392 goto out; 393 394 /* 395 * Ensure that this device isn't already mounted or in progress on a 396 * mount unless this is a REMOUNT request or we are told to suppress 397 * mount checks. Global mounts require special handling. 398 */ 399 if ((uap->flags & MS_NOCHECK) == 0) { 400 if ((uap->flags & MS_GLOBAL) == 0 && 401 vfs_devmounting(dev, vfsp)) { 402 error = EBUSY; 403 goto out; 404 } 405 if (vfs_devismounted(dev)) { 406 if ((uap->flags & MS_REMOUNT) == 0) { 407 error = EBUSY; 408 goto out; 409 } 410 } 411 } 412 413 /* 414 * If the device is a tape, mount it read only 415 */ 416 if (devopsp[getmajor(dev)]->devo_cb_ops->cb_flag & D_TAPE) { 417 vfsp->vfs_flag |= VFS_RDONLY; 418 vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); 419 } 420 if (uap->flags & MS_RDONLY) 421 vfsp->vfs_flag |= VFS_RDONLY; 422 423 /* 424 * Mount the filesystem, free the device vnode on error. 425 */ 426 error = mountfs(vfsp, why, lvp != NULL ? lvp : svp, 427 dpn.pn_path, cr, 0, &args, datalen); 428 429 if (error == 0) { 430 vfs_set_feature(vfsp, VFSFT_XVATTR); 431 432 /* 433 * If lofi, drop our reference to the original file. 434 */ 435 if (lvp != NULL) 436 VN_RELE(svp); 437 } 438 439 out: 440 pn_free(&dpn); 441 442 if (error) { 443 if (lvp != NULL) 444 VN_RELE(lvp); 445 if (svp != NULL) 446 VN_RELE(svp); 447 } 448 return (error); 449 } 450 451 /* 452 * Mount root file system. 453 * "why" is ROOT_INIT on initial call ROOT_REMOUNT if called to 454 * remount the root file system, and ROOT_UNMOUNT if called to 455 * unmount the root (e.g., as part of a system shutdown). 456 * 457 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP 458 * operation, goes along with auto-configuration. A mechanism should be 459 * provided by which machine-INdependent code in the kernel can say "get me the 460 * right root file system" and "get me the right initial swap area", and have 461 * that done in what may well be a machine-dependent fashion. 462 * Unfortunately, it is also file-system-type dependent (NFS gets it via 463 * bootparams calls, UFS gets it from various and sundry machine-dependent 464 * mechanisms, as SPECFS does for swap). 465 */ 466 static int 467 ufs_mountroot(struct vfs *vfsp, enum whymountroot why) 468 { 469 struct fs *fsp; 470 int error; 471 static int ufsrootdone = 0; 472 dev_t rootdev; 473 struct vnode *vp; 474 struct vnode *devvp = 0; 475 int ovflags; 476 int doclkset; 477 ufsvfs_t *ufsvfsp; 478 479 if (why == ROOT_INIT) { 480 if (ufsrootdone++) 481 return (EBUSY); 482 rootdev = getrootdev(); 483 if (rootdev == (dev_t)NODEV) 484 return (ENODEV); 485 vfsp->vfs_dev = rootdev; 486 vfsp->vfs_flag |= VFS_RDONLY; 487 } else if (why == ROOT_REMOUNT) { 488 vp = ((struct ufsvfs *)vfsp->vfs_data)->vfs_devvp; 489 (void) dnlc_purge_vfsp(vfsp, 0); 490 vp = common_specvp(vp); 491 (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_INVAL, 492 CRED(), NULL); 493 (void) bfinval(vfsp->vfs_dev, 0); 494 fsp = getfs(vfsp); 495 496 ovflags = vfsp->vfs_flag; 497 vfsp->vfs_flag &= ~VFS_RDONLY; 498 vfsp->vfs_flag |= VFS_REMOUNT; 499 rootdev = vfsp->vfs_dev; 500 } else if (why == ROOT_UNMOUNT) { 501 if (vfs_lock(vfsp) == 0) { 502 (void) ufs_flush(vfsp); 503 /* 504 * Mark the log as fully rolled 505 */ 506 ufsvfsp = (ufsvfs_t *)vfsp->vfs_data; 507 fsp = ufsvfsp->vfs_fs; 508 if (TRANS_ISTRANS(ufsvfsp) && 509 !TRANS_ISERROR(ufsvfsp) && 510 (fsp->fs_rolled == FS_NEED_ROLL)) { 511 ml_unit_t *ul = ufsvfsp->vfs_log; 512 513 error = ufs_putsummaryinfo(ul->un_dev, 514 ufsvfsp, fsp); 515 if (error == 0) { 516 fsp->fs_rolled = FS_ALL_ROLLED; 517 UFS_BWRITE2(NULL, ufsvfsp->vfs_bufp); 518 } 519 } 520 vfs_unlock(vfsp); 521 } else { 522 ufs_update(0); 523 } 524 525 vp = ((struct ufsvfs *)vfsp->vfs_data)->vfs_devvp; 526 (void) VOP_CLOSE(vp, FREAD|FWRITE, 1, 527 (offset_t)0, CRED(), NULL); 528 return (0); 529 } 530 error = vfs_lock(vfsp); 531 if (error) 532 return (error); 533 534 devvp = makespecvp(rootdev, VBLK); 535 536 /* If RO media, don't call clkset() (see below) */ 537 doclkset = 1; 538 if (why == ROOT_INIT) { 539 error = VOP_OPEN(&devvp, FREAD|FWRITE, CRED(), NULL); 540 if (error == 0) { 541 (void) VOP_CLOSE(devvp, FREAD|FWRITE, 1, 542 (offset_t)0, CRED(), NULL); 543 } else { 544 doclkset = 0; 545 } 546 } 547 548 error = mountfs(vfsp, why, devvp, "/", CRED(), 1, NULL, 0); 549 /* 550 * XXX - assumes root device is not indirect, because we don't set 551 * rootvp. Is rootvp used for anything? If so, make another arg 552 * to mountfs. 553 */ 554 if (error) { 555 vfs_unlock(vfsp); 556 if (why == ROOT_REMOUNT) 557 vfsp->vfs_flag = ovflags; 558 if (rootvp) { 559 VN_RELE(rootvp); 560 rootvp = (struct vnode *)0; 561 } 562 VN_RELE(devvp); 563 return (error); 564 } 565 if (why == ROOT_INIT) 566 vfs_add((struct vnode *)0, vfsp, 567 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 568 vfs_unlock(vfsp); 569 fsp = getfs(vfsp); 570 clkset(doclkset ? fsp->fs_time : -1); 571 ufsvfsp = (ufsvfs_t *)vfsp->vfs_data; 572 if (ufsvfsp->vfs_log) { 573 vfs_setmntopt(vfsp, MNTOPT_LOGGING, NULL, 0); 574 } 575 return (0); 576 } 577 578 static int 579 remountfs(struct vfs *vfsp, dev_t dev, void *raw_argsp, int args_len) 580 { 581 struct ufsvfs *ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 582 struct ulockfs *ulp = &ufsvfsp->vfs_ulockfs; 583 struct buf *bp = ufsvfsp->vfs_bufp; 584 struct fs *fsp = (struct fs *)bp->b_un.b_addr; 585 struct fs *fspt; 586 struct buf *tpt = 0; 587 int error = 0; 588 int flags = 0; 589 590 if (args_len == sizeof (struct ufs_args) && raw_argsp) 591 flags = ((struct ufs_args *)raw_argsp)->flags; 592 593 /* cannot remount to RDONLY */ 594 if (vfsp->vfs_flag & VFS_RDONLY) 595 return (ENOTSUP); 596 597 /* whoops, wrong dev */ 598 if (vfsp->vfs_dev != dev) 599 return (EINVAL); 600 601 /* 602 * synchronize w/ufs ioctls 603 */ 604 mutex_enter(&ulp->ul_lock); 605 atomic_add_long(&ufs_quiesce_pend, 1); 606 607 /* 608 * reset options 609 */ 610 ufsvfsp->vfs_nointr = flags & UFSMNT_NOINTR; 611 ufsvfsp->vfs_syncdir = flags & UFSMNT_SYNCDIR; 612 ufsvfsp->vfs_nosetsec = flags & UFSMNT_NOSETSEC; 613 ufsvfsp->vfs_noatime = flags & UFSMNT_NOATIME; 614 if ((flags & UFSMNT_NODFRATIME) || ufsvfsp->vfs_noatime) 615 ufsvfsp->vfs_dfritime &= ~UFS_DFRATIME; 616 else /* dfratime, default behavior */ 617 ufsvfsp->vfs_dfritime |= UFS_DFRATIME; 618 if (flags & UFSMNT_FORCEDIRECTIO) 619 ufsvfsp->vfs_forcedirectio = 1; 620 else /* default is no direct I/O */ 621 ufsvfsp->vfs_forcedirectio = 0; 622 ufsvfsp->vfs_iotstamp = lbolt; 623 624 /* 625 * set largefiles flag in ufsvfs equal to the 626 * value passed in by the mount command. If 627 * it is "nolargefiles", and the flag is set 628 * in the superblock, the mount fails. 629 */ 630 if (!(flags & UFSMNT_LARGEFILES)) { /* "nolargefiles" */ 631 if (fsp->fs_flags & FSLARGEFILES) { 632 error = EFBIG; 633 goto remounterr; 634 } 635 ufsvfsp->vfs_lfflags &= ~UFS_LARGEFILES; 636 } else /* "largefiles" */ 637 ufsvfsp->vfs_lfflags |= UFS_LARGEFILES; 638 /* 639 * read/write to read/write; all done 640 */ 641 if (fsp->fs_ronly == 0) 642 goto remounterr; 643 644 /* 645 * fix-on-panic assumes RO->RW remount implies system-critical fs 646 * if it is shortly after boot; so, don't attempt to lock and fix 647 * (unless the user explicitly asked for another action on error) 648 * XXX UFSMNT_ONERROR_RDONLY rather than UFSMNT_ONERROR_PANIC 649 */ 650 #define BOOT_TIME_LIMIT (180*hz) 651 if (!(flags & UFSMNT_ONERROR_FLGMASK) && lbolt < BOOT_TIME_LIMIT) { 652 cmn_err(CE_WARN, "%s is required to be mounted onerror=%s", 653 ufsvfsp->vfs_fs->fs_fsmnt, UFSMNT_ONERROR_PANIC_STR); 654 flags |= UFSMNT_ONERROR_PANIC; 655 } 656 657 if ((error = ufsfx_mount(ufsvfsp, flags)) != 0) 658 goto remounterr; 659 660 /* 661 * quiesce the file system 662 */ 663 error = ufs_quiesce(ulp); 664 if (error) 665 goto remounterr; 666 667 tpt = UFS_BREAD(ufsvfsp, ufsvfsp->vfs_dev, SBLOCK, SBSIZE); 668 if (tpt->b_flags & B_ERROR) { 669 error = EIO; 670 goto remounterr; 671 } 672 fspt = (struct fs *)tpt->b_un.b_addr; 673 if (((fspt->fs_magic != FS_MAGIC) && 674 (fspt->fs_magic != MTB_UFS_MAGIC)) || 675 (fspt->fs_magic == FS_MAGIC && 676 (fspt->fs_version != UFS_EFISTYLE4NONEFI_VERSION_2 && 677 fspt->fs_version != UFS_VERSION_MIN)) || 678 (fspt->fs_magic == MTB_UFS_MAGIC && 679 (fspt->fs_version > MTB_UFS_VERSION_1 || 680 fspt->fs_version < MTB_UFS_VERSION_MIN)) || 681 fspt->fs_bsize > MAXBSIZE || fspt->fs_frag > MAXFRAG || 682 fspt->fs_bsize < sizeof (struct fs) || fspt->fs_bsize < PAGESIZE) { 683 tpt->b_flags |= B_STALE | B_AGE; 684 error = EINVAL; 685 goto remounterr; 686 } 687 688 if (ufsvfsp->vfs_log && (ufsvfsp->vfs_log->un_flags & LDL_NOROLL)) { 689 ufsvfsp->vfs_log->un_flags &= ~LDL_NOROLL; 690 logmap_start_roll(ufsvfsp->vfs_log); 691 } 692 693 if (TRANS_ISERROR(ufsvfsp)) 694 goto remounterr; 695 TRANS_DOMATAMAP(ufsvfsp); 696 697 if ((fspt->fs_state + fspt->fs_time == FSOKAY) && 698 fspt->fs_clean == FSLOG && !TRANS_ISTRANS(ufsvfsp)) { 699 ufsvfsp->vfs_log = NULL; 700 ufsvfsp->vfs_domatamap = 0; 701 error = ENOSPC; 702 goto remounterr; 703 } 704 705 if (fspt->fs_state + fspt->fs_time == FSOKAY && 706 (fspt->fs_clean == FSCLEAN || 707 fspt->fs_clean == FSSTABLE || 708 fspt->fs_clean == FSLOG)) { 709 710 /* 711 * Ensure that ufs_getsummaryinfo doesn't reconstruct 712 * the summary info. 713 */ 714 error = ufs_getsummaryinfo(vfsp->vfs_dev, ufsvfsp, fspt); 715 if (error) 716 goto remounterr; 717 718 /* preserve mount name */ 719 (void) strncpy(fspt->fs_fsmnt, fsp->fs_fsmnt, MAXMNTLEN); 720 /* free the old cg space */ 721 kmem_free(fsp->fs_u.fs_csp, fsp->fs_cssize); 722 /* switch in the new superblock */ 723 fspt->fs_rolled = FS_NEED_ROLL; 724 bcopy(tpt->b_un.b_addr, bp->b_un.b_addr, fspt->fs_sbsize); 725 726 fsp->fs_clean = FSSTABLE; 727 } /* superblock updated in memory */ 728 tpt->b_flags |= B_STALE | B_AGE; 729 brelse(tpt); 730 tpt = 0; 731 732 if (fsp->fs_clean != FSSTABLE) { 733 error = ENOSPC; 734 goto remounterr; 735 } 736 737 738 if (TRANS_ISTRANS(ufsvfsp)) { 739 fsp->fs_clean = FSLOG; 740 ufsvfsp->vfs_dio = 0; 741 } else 742 if (ufsvfsp->vfs_dio) 743 fsp->fs_clean = FSSUSPEND; 744 745 TRANS_MATA_MOUNT(ufsvfsp); 746 747 fsp->fs_fmod = 0; 748 fsp->fs_ronly = 0; 749 750 atomic_add_long(&ufs_quiesce_pend, -1); 751 cv_broadcast(&ulp->ul_cv); 752 mutex_exit(&ulp->ul_lock); 753 754 if (TRANS_ISTRANS(ufsvfsp)) { 755 756 /* 757 * start the delete thread 758 */ 759 ufs_thread_start(&ufsvfsp->vfs_delete, ufs_thread_delete, vfsp); 760 761 /* 762 * start the reclaim thread 763 */ 764 if (fsp->fs_reclaim & (FS_RECLAIM|FS_RECLAIMING)) { 765 fsp->fs_reclaim &= ~FS_RECLAIM; 766 fsp->fs_reclaim |= FS_RECLAIMING; 767 ufs_thread_start(&ufsvfsp->vfs_reclaim, 768 ufs_thread_reclaim, vfsp); 769 } 770 } 771 772 TRANS_SBWRITE(ufsvfsp, TOP_MOUNT); 773 774 return (0); 775 776 remounterr: 777 if (tpt) 778 brelse(tpt); 779 atomic_add_long(&ufs_quiesce_pend, -1); 780 cv_broadcast(&ulp->ul_cv); 781 mutex_exit(&ulp->ul_lock); 782 return (error); 783 } 784 785 /* 786 * If the device maxtransfer size is not available, we use ufs_maxmaxphys 787 * along with the system value for maxphys to determine the value for 788 * maxtransfer. 789 */ 790 int ufs_maxmaxphys = (1024 * 1024); 791 792 #include <sys/ddi.h> /* for delay(9f) */ 793 794 int ufs_mount_error_delay = 20; /* default to 20ms */ 795 int ufs_mount_timeout = 60000; /* default to 1 minute */ 796 797 static int 798 mountfs(struct vfs *vfsp, enum whymountroot why, struct vnode *devvp, 799 char *path, cred_t *cr, int isroot, void *raw_argsp, int args_len) 800 { 801 dev_t dev = devvp->v_rdev; 802 struct fs *fsp; 803 struct ufsvfs *ufsvfsp = 0; 804 struct buf *bp = 0; 805 struct buf *tp = 0; 806 struct dk_cinfo ci; 807 int error = 0; 808 size_t len; 809 int needclose = 0; 810 int needtrans = 0; 811 struct inode *rip; 812 struct vnode *rvp = NULL; 813 int flags = 0; 814 kmutex_t *ihm; 815 int elapsed; 816 int status; 817 extern int maxphys; 818 819 if (args_len == sizeof (struct ufs_args) && raw_argsp) 820 flags = ((struct ufs_args *)raw_argsp)->flags; 821 822 ASSERT(vfs_lock_held(vfsp)); 823 824 if (why == ROOT_INIT) { 825 /* 826 * Open block device mounted on. 827 * When bio is fixed for vnodes this can all be vnode 828 * operations. 829 */ 830 error = VOP_OPEN(&devvp, 831 (vfsp->vfs_flag & VFS_RDONLY) ? FREAD : FREAD|FWRITE, 832 cr, NULL); 833 if (error) 834 goto out; 835 needclose = 1; 836 837 /* 838 * Refuse to go any further if this 839 * device is being used for swapping. 840 */ 841 if (IS_SWAPVP(devvp)) { 842 error = EBUSY; 843 goto out; 844 } 845 } 846 847 /* 848 * check for dev already mounted on 849 */ 850 if (vfsp->vfs_flag & VFS_REMOUNT) { 851 error = remountfs(vfsp, dev, raw_argsp, args_len); 852 if (error == 0) 853 VN_RELE(devvp); 854 return (error); 855 } 856 857 ASSERT(devvp != 0); 858 859 /* 860 * Flush back any dirty pages on the block device to 861 * try and keep the buffer cache in sync with the page 862 * cache if someone is trying to use block devices when 863 * they really should be using the raw device. 864 */ 865 (void) VOP_PUTPAGE(common_specvp(devvp), (offset_t)0, 866 (size_t)0, B_INVAL, cr, NULL); 867 868 /* 869 * read in superblock 870 */ 871 ufsvfsp = kmem_zalloc(sizeof (struct ufsvfs), KM_SLEEP); 872 tp = UFS_BREAD(ufsvfsp, dev, SBLOCK, SBSIZE); 873 if (tp->b_flags & B_ERROR) 874 goto out; 875 fsp = (struct fs *)tp->b_un.b_addr; 876 877 if ((fsp->fs_magic != FS_MAGIC) && (fsp->fs_magic != MTB_UFS_MAGIC)) { 878 cmn_err(CE_NOTE, 879 "mount: not a UFS magic number (0x%x)", fsp->fs_magic); 880 error = EINVAL; 881 goto out; 882 } 883 884 if ((fsp->fs_magic == FS_MAGIC) && 885 (fsp->fs_version != UFS_EFISTYLE4NONEFI_VERSION_2 && 886 fsp->fs_version != UFS_VERSION_MIN)) { 887 cmn_err(CE_NOTE, 888 "mount: unrecognized version of UFS on-disk format: %d", 889 fsp->fs_version); 890 error = EINVAL; 891 goto out; 892 } 893 894 if ((fsp->fs_magic == MTB_UFS_MAGIC) && 895 (fsp->fs_version > MTB_UFS_VERSION_1 || 896 fsp->fs_version < MTB_UFS_VERSION_MIN)) { 897 cmn_err(CE_NOTE, 898 "mount: unrecognized version of UFS on-disk format: %d", 899 fsp->fs_version); 900 error = EINVAL; 901 goto out; 902 } 903 904 #ifndef _LP64 905 if (fsp->fs_magic == MTB_UFS_MAGIC) { 906 /* 907 * Find the size of the device in sectors. If the 908 * the size in sectors is greater than INT_MAX, it's 909 * a multi-terabyte file system, which can't be 910 * mounted by a 32-bit kernel. We can't use the 911 * fsbtodb() macro in the next line because the macro 912 * casts the intermediate values to daddr_t, which is 913 * a 32-bit quantity in a 32-bit kernel. Here we 914 * really do need the intermediate values to be held 915 * in 64-bit quantities because we're checking for 916 * overflow of a 32-bit field. 917 */ 918 if ((((diskaddr_t)(fsp->fs_size)) << fsp->fs_fsbtodb) 919 > INT_MAX) { 920 cmn_err(CE_NOTE, 921 "mount: multi-terabyte UFS cannot be" 922 " mounted by a 32-bit kernel"); 923 error = EINVAL; 924 goto out; 925 } 926 927 } 928 #endif 929 930 if (fsp->fs_bsize > MAXBSIZE || fsp->fs_frag > MAXFRAG || 931 fsp->fs_bsize < sizeof (struct fs) || fsp->fs_bsize < PAGESIZE) { 932 error = EINVAL; /* also needs translation */ 933 goto out; 934 } 935 936 /* 937 * Allocate VFS private data. 938 */ 939 vfsp->vfs_bcount = 0; 940 vfsp->vfs_data = (caddr_t)ufsvfsp; 941 vfsp->vfs_fstype = ufsfstype; 942 vfsp->vfs_dev = dev; 943 vfsp->vfs_flag |= VFS_NOTRUNC; 944 vfs_make_fsid(&vfsp->vfs_fsid, dev, ufsfstype); 945 ufsvfsp->vfs_devvp = devvp; 946 947 /* 948 * Cross-link with vfs and add to instance list. 949 */ 950 ufsvfsp->vfs_vfs = vfsp; 951 ufs_vfs_add(ufsvfsp); 952 953 ufsvfsp->vfs_dev = dev; 954 ufsvfsp->vfs_bufp = tp; 955 956 ufsvfsp->vfs_dirsize = INODESIZE + (4 * ALLOCSIZE) + fsp->fs_fsize; 957 ufsvfsp->vfs_minfrags = 958 (int)((int64_t)fsp->fs_dsize * fsp->fs_minfree / 100); 959 /* 960 * if mount allows largefiles, indicate so in ufsvfs 961 */ 962 if (flags & UFSMNT_LARGEFILES) 963 ufsvfsp->vfs_lfflags |= UFS_LARGEFILES; 964 /* 965 * Initialize threads 966 */ 967 ufs_delete_init(ufsvfsp, 1); 968 ufs_thread_init(&ufsvfsp->vfs_reclaim, 0); 969 970 /* 971 * Chicken and egg problem. The superblock may have deltas 972 * in the log. So after the log is scanned we reread the 973 * superblock. We guarantee that the fields needed to 974 * scan the log will not be in the log. 975 */ 976 if (fsp->fs_logbno && fsp->fs_clean == FSLOG && 977 (fsp->fs_state + fsp->fs_time == FSOKAY)) { 978 error = lufs_snarf(ufsvfsp, fsp, (vfsp->vfs_flag & VFS_RDONLY)); 979 if (error) { 980 /* 981 * Allow a ro mount to continue even if the 982 * log cannot be processed - yet. 983 */ 984 if (!(vfsp->vfs_flag & VFS_RDONLY)) { 985 cmn_err(CE_WARN, "Error accessing ufs " 986 "log for %s; Please run fsck(1M)", path); 987 goto out; 988 } 989 } 990 tp->b_flags |= (B_AGE | B_STALE); 991 brelse(tp); 992 tp = UFS_BREAD(ufsvfsp, dev, SBLOCK, SBSIZE); 993 fsp = (struct fs *)tp->b_un.b_addr; 994 ufsvfsp->vfs_bufp = tp; 995 if (tp->b_flags & B_ERROR) 996 goto out; 997 } 998 999 /* 1000 * Set logging mounted flag used by lockfs 1001 */ 1002 ufsvfsp->vfs_validfs = UT_MOUNTED; 1003 1004 /* 1005 * Copy the super block into a buffer in its native size. 1006 * Use ngeteblk to allocate the buffer 1007 */ 1008 bp = ngeteblk(fsp->fs_bsize); 1009 ufsvfsp->vfs_bufp = bp; 1010 bp->b_edev = dev; 1011 bp->b_dev = cmpdev(dev); 1012 bp->b_blkno = SBLOCK; 1013 bp->b_bcount = fsp->fs_sbsize; 1014 bcopy(tp->b_un.b_addr, bp->b_un.b_addr, fsp->fs_sbsize); 1015 tp->b_flags |= B_STALE | B_AGE; 1016 brelse(tp); 1017 tp = 0; 1018 1019 fsp = (struct fs *)bp->b_un.b_addr; 1020 /* 1021 * Mount fails if superblock flag indicates presence of large 1022 * files and filesystem is attempted to be mounted 'nolargefiles'. 1023 * The exception is for a read only mount of root, which we 1024 * always want to succeed, so fsck can fix potential problems. 1025 * The assumption is that we will remount root at some point, 1026 * and the remount will enforce the mount option. 1027 */ 1028 if (!(isroot & (vfsp->vfs_flag & VFS_RDONLY)) && 1029 (fsp->fs_flags & FSLARGEFILES) && 1030 !(flags & UFSMNT_LARGEFILES)) { 1031 error = EFBIG; 1032 goto out; 1033 } 1034 1035 if (vfsp->vfs_flag & VFS_RDONLY) { 1036 fsp->fs_ronly = 1; 1037 fsp->fs_fmod = 0; 1038 if (((fsp->fs_state + fsp->fs_time) == FSOKAY) && 1039 ((fsp->fs_clean == FSCLEAN) || 1040 (fsp->fs_clean == FSSTABLE) || 1041 (fsp->fs_clean == FSLOG))) { 1042 if (isroot) { 1043 if (fsp->fs_clean == FSLOG) { 1044 if (fsp->fs_rolled == FS_ALL_ROLLED) { 1045 ufs_clean_root = 1; 1046 } 1047 } else { 1048 ufs_clean_root = 1; 1049 } 1050 } 1051 fsp->fs_clean = FSSTABLE; 1052 } else { 1053 fsp->fs_clean = FSBAD; 1054 } 1055 } else { 1056 1057 fsp->fs_fmod = 0; 1058 fsp->fs_ronly = 0; 1059 1060 TRANS_DOMATAMAP(ufsvfsp); 1061 1062 if ((TRANS_ISERROR(ufsvfsp)) || 1063 (((fsp->fs_state + fsp->fs_time) == FSOKAY) && 1064 fsp->fs_clean == FSLOG && !TRANS_ISTRANS(ufsvfsp))) { 1065 ufsvfsp->vfs_log = NULL; 1066 ufsvfsp->vfs_domatamap = 0; 1067 error = ENOSPC; 1068 goto out; 1069 } 1070 1071 if (((fsp->fs_state + fsp->fs_time) == FSOKAY) && 1072 (fsp->fs_clean == FSCLEAN || 1073 fsp->fs_clean == FSSTABLE || 1074 fsp->fs_clean == FSLOG)) 1075 fsp->fs_clean = FSSTABLE; 1076 else { 1077 if (isroot) { 1078 /* 1079 * allow root partition to be mounted even 1080 * when fs_state is not ok 1081 * will be fixed later by a remount root 1082 */ 1083 fsp->fs_clean = FSBAD; 1084 ufsvfsp->vfs_log = NULL; 1085 ufsvfsp->vfs_domatamap = 0; 1086 } else { 1087 error = ENOSPC; 1088 goto out; 1089 } 1090 } 1091 1092 if (fsp->fs_clean == FSSTABLE && TRANS_ISTRANS(ufsvfsp)) 1093 fsp->fs_clean = FSLOG; 1094 } 1095 TRANS_MATA_MOUNT(ufsvfsp); 1096 needtrans = 1; 1097 1098 vfsp->vfs_bsize = fsp->fs_bsize; 1099 1100 /* 1101 * Read in summary info 1102 */ 1103 if (error = ufs_getsummaryinfo(dev, ufsvfsp, fsp)) 1104 goto out; 1105 1106 /* 1107 * lastwhinetime is set to zero rather than lbolt, so that after 1108 * mounting if the filesystem is found to be full, then immediately the 1109 * "file system message" will be logged. 1110 */ 1111 ufsvfsp->vfs_lastwhinetime = 0L; 1112 1113 1114 mutex_init(&ufsvfsp->vfs_lock, NULL, MUTEX_DEFAULT, NULL); 1115 (void) copystr(path, fsp->fs_fsmnt, sizeof (fsp->fs_fsmnt) - 1, &len); 1116 bzero(fsp->fs_fsmnt + len, sizeof (fsp->fs_fsmnt) - len); 1117 1118 /* 1119 * Sanity checks for old file systems 1120 */ 1121 if (fsp->fs_postblformat == FS_42POSTBLFMT) 1122 ufsvfsp->vfs_nrpos = 8; 1123 else 1124 ufsvfsp->vfs_nrpos = fsp->fs_nrpos; 1125 1126 /* 1127 * Initialize lockfs structure to support file system locking 1128 */ 1129 bzero(&ufsvfsp->vfs_ulockfs.ul_lockfs, 1130 sizeof (struct lockfs)); 1131 ufsvfsp->vfs_ulockfs.ul_fs_lock = ULOCKFS_ULOCK; 1132 mutex_init(&ufsvfsp->vfs_ulockfs.ul_lock, NULL, 1133 MUTEX_DEFAULT, NULL); 1134 cv_init(&ufsvfsp->vfs_ulockfs.ul_cv, NULL, CV_DEFAULT, NULL); 1135 1136 /* 1137 * We don't need to grab vfs_dqrwlock for this ufs_iget() call. 1138 * We are in the process of mounting the file system so there 1139 * is no need to grab the quota lock. If a quota applies to the 1140 * root inode, then it will be updated when quotas are enabled. 1141 * 1142 * However, we have an ASSERT(RW_LOCK_HELD(&ufsvfsp->vfs_dqrwlock)) 1143 * in getinoquota() that we want to keep so grab it anyway. 1144 */ 1145 rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 1146 1147 error = ufs_iget_alloced(vfsp, UFSROOTINO, &rip, cr); 1148 1149 rw_exit(&ufsvfsp->vfs_dqrwlock); 1150 1151 if (error) 1152 goto out; 1153 1154 /* 1155 * make sure root inode is a directory. Returning ENOTDIR might 1156 * be confused with the mount point not being a directory, so 1157 * we use EIO instead. 1158 */ 1159 if ((rip->i_mode & IFMT) != IFDIR) { 1160 /* 1161 * Mark this inode as subject for cleanup 1162 * to avoid stray inodes in the cache. 1163 */ 1164 rvp = ITOV(rip); 1165 error = EIO; 1166 goto out; 1167 } 1168 1169 rvp = ITOV(rip); 1170 mutex_enter(&rvp->v_lock); 1171 rvp->v_flag |= VROOT; 1172 mutex_exit(&rvp->v_lock); 1173 ufsvfsp->vfs_root = rvp; 1174 /* The buffer for the root inode does not contain a valid b_vp */ 1175 (void) bfinval(dev, 0); 1176 1177 /* options */ 1178 ufsvfsp->vfs_nosetsec = flags & UFSMNT_NOSETSEC; 1179 ufsvfsp->vfs_nointr = flags & UFSMNT_NOINTR; 1180 ufsvfsp->vfs_syncdir = flags & UFSMNT_SYNCDIR; 1181 ufsvfsp->vfs_noatime = flags & UFSMNT_NOATIME; 1182 if ((flags & UFSMNT_NODFRATIME) || ufsvfsp->vfs_noatime) 1183 ufsvfsp->vfs_dfritime &= ~UFS_DFRATIME; 1184 else /* dfratime, default behavior */ 1185 ufsvfsp->vfs_dfritime |= UFS_DFRATIME; 1186 if (flags & UFSMNT_FORCEDIRECTIO) 1187 ufsvfsp->vfs_forcedirectio = 1; 1188 else if (flags & UFSMNT_NOFORCEDIRECTIO) 1189 ufsvfsp->vfs_forcedirectio = 0; 1190 ufsvfsp->vfs_iotstamp = lbolt; 1191 1192 ufsvfsp->vfs_nindiroffset = fsp->fs_nindir - 1; 1193 ufsvfsp->vfs_nindirshift = highbit(ufsvfsp->vfs_nindiroffset); 1194 ufsvfsp->vfs_ioclustsz = fsp->fs_bsize * fsp->fs_maxcontig; 1195 1196 if (cdev_ioctl(dev, DKIOCINFO, (intptr_t)&ci, 1197 FKIOCTL|FNATIVE|FREAD, CRED(), &status) == 0) { 1198 ufsvfsp->vfs_iotransz = ci.dki_maxtransfer * DEV_BSIZE; 1199 } else { 1200 ufsvfsp->vfs_iotransz = MIN(maxphys, ufs_maxmaxphys); 1201 } 1202 1203 if (ufsvfsp->vfs_iotransz <= 0) { 1204 ufsvfsp->vfs_iotransz = MIN(maxphys, ufs_maxmaxphys); 1205 } 1206 1207 /* 1208 * When logging, used to reserve log space for writes and truncs 1209 */ 1210 ufsvfsp->vfs_avgbfree = fsp->fs_cstotal.cs_nbfree / fsp->fs_ncg; 1211 1212 /* 1213 * Determine whether to log cylinder group summary info. 1214 */ 1215 ufsvfsp->vfs_nolog_si = (fsp->fs_ncg < ufs_ncg_log); 1216 1217 if (TRANS_ISTRANS(ufsvfsp)) { 1218 /* 1219 * start the delete thread 1220 */ 1221 ufs_thread_start(&ufsvfsp->vfs_delete, ufs_thread_delete, vfsp); 1222 1223 /* 1224 * start reclaim thread if the filesystem was not mounted 1225 * read only. 1226 */ 1227 if (!fsp->fs_ronly && (fsp->fs_reclaim & 1228 (FS_RECLAIM|FS_RECLAIMING))) { 1229 fsp->fs_reclaim &= ~FS_RECLAIM; 1230 fsp->fs_reclaim |= FS_RECLAIMING; 1231 ufs_thread_start(&ufsvfsp->vfs_reclaim, 1232 ufs_thread_reclaim, vfsp); 1233 } 1234 1235 /* Mark the fs as unrolled */ 1236 fsp->fs_rolled = FS_NEED_ROLL; 1237 } else if (!fsp->fs_ronly && (fsp->fs_reclaim & 1238 (FS_RECLAIM|FS_RECLAIMING))) { 1239 /* 1240 * If a file system that is mounted nologging, after 1241 * having previously been mounted logging, becomes 1242 * unmounted whilst the reclaim thread is in the throes 1243 * of reclaiming open/deleted inodes, a subsequent mount 1244 * of such a file system with logging disabled could lead 1245 * to inodes becoming lost. So, start reclaim now, even 1246 * though logging was disabled for the previous mount, to 1247 * tidy things up. 1248 */ 1249 fsp->fs_reclaim &= ~FS_RECLAIM; 1250 fsp->fs_reclaim |= FS_RECLAIMING; 1251 ufs_thread_start(&ufsvfsp->vfs_reclaim, 1252 ufs_thread_reclaim, vfsp); 1253 } 1254 1255 if (!fsp->fs_ronly) { 1256 TRANS_SBWRITE(ufsvfsp, TOP_MOUNT); 1257 if (error = geterror(ufsvfsp->vfs_bufp)) 1258 goto out; 1259 } 1260 1261 /* fix-on-panic initialization */ 1262 if (isroot && !(flags & UFSMNT_ONERROR_FLGMASK)) 1263 flags |= UFSMNT_ONERROR_PANIC; /* XXX ..._RDONLY */ 1264 1265 if ((error = ufsfx_mount(ufsvfsp, flags)) != 0) 1266 goto out; 1267 1268 if (why == ROOT_INIT && isroot) 1269 rootvp = devvp; 1270 1271 return (0); 1272 out: 1273 if (error == 0) 1274 error = EIO; 1275 if (rvp) { 1276 /* the following sequence is similar to ufs_unmount() */ 1277 1278 /* 1279 * There's a problem that ufs_iget() puts inodes into 1280 * the inode cache before it returns them. If someone 1281 * traverses that cache and gets a reference to our 1282 * inode, there's a chance they'll still be using it 1283 * after we've destroyed it. This is a hard race to 1284 * hit, but it's happened (putting in a medium delay 1285 * here, and a large delay in ufs_scan_inodes() for 1286 * inodes on the device we're bailing out on, makes 1287 * the race easy to demonstrate). The symptom is some 1288 * other part of UFS faulting on bad inode contents, 1289 * or when grabbing one of the locks inside the inode, 1290 * etc. The usual victim is ufs_scan_inodes() or 1291 * someone called by it. 1292 */ 1293 1294 /* 1295 * First, isolate it so that no new references can be 1296 * gotten via the inode cache. 1297 */ 1298 ihm = &ih_lock[INOHASH(UFSROOTINO)]; 1299 mutex_enter(ihm); 1300 remque(rip); 1301 mutex_exit(ihm); 1302 1303 /* 1304 * Now wait for all outstanding references except our 1305 * own to drain. This could, in theory, take forever, 1306 * so don't wait *too* long. If we time out, mark 1307 * it stale and leak it, so we don't hit the problem 1308 * described above. 1309 * 1310 * Note that v_count is an int, which means we can read 1311 * it in one operation. Thus, there's no need to lock 1312 * around our tests. 1313 */ 1314 elapsed = 0; 1315 while ((rvp->v_count > 1) && (elapsed < ufs_mount_timeout)) { 1316 delay(ufs_mount_error_delay * drv_usectohz(1000)); 1317 elapsed += ufs_mount_error_delay; 1318 } 1319 1320 if (rvp->v_count > 1) { 1321 mutex_enter(&rip->i_tlock); 1322 rip->i_flag |= ISTALE; 1323 mutex_exit(&rip->i_tlock); 1324 cmn_err(CE_WARN, 1325 "Timed out while cleaning up after " 1326 "failed mount of %s", path); 1327 } else { 1328 1329 /* 1330 * Now we're the only one with a handle left, so tear 1331 * it down the rest of the way. 1332 */ 1333 if (ufs_rmidle(rip)) 1334 VN_RELE(rvp); 1335 ufs_si_del(rip); 1336 rip->i_ufsvfs = NULL; 1337 rvp->v_vfsp = NULL; 1338 rvp->v_type = VBAD; 1339 VN_RELE(rvp); 1340 } 1341 } 1342 if (needtrans) { 1343 TRANS_MATA_UMOUNT(ufsvfsp); 1344 } 1345 if (ufsvfsp) { 1346 ufs_vfs_remove(ufsvfsp); 1347 ufs_thread_exit(&ufsvfsp->vfs_delete); 1348 ufs_thread_exit(&ufsvfsp->vfs_reclaim); 1349 mutex_destroy(&ufsvfsp->vfs_lock); 1350 if (ufsvfsp->vfs_log) { 1351 lufs_unsnarf(ufsvfsp); 1352 } 1353 kmem_free(ufsvfsp, sizeof (struct ufsvfs)); 1354 } 1355 if (bp) { 1356 bp->b_flags |= (B_STALE|B_AGE); 1357 brelse(bp); 1358 } 1359 if (tp) { 1360 tp->b_flags |= (B_STALE|B_AGE); 1361 brelse(tp); 1362 } 1363 if (needclose) { 1364 (void) VOP_CLOSE(devvp, (vfsp->vfs_flag & VFS_RDONLY) ? 1365 FREAD : FREAD|FWRITE, 1, (offset_t)0, cr, NULL); 1366 bflush(dev); 1367 (void) bfinval(dev, 1); 1368 } 1369 return (error); 1370 } 1371 1372 /* 1373 * vfs operations 1374 */ 1375 static int 1376 ufs_unmount(struct vfs *vfsp, int fflag, struct cred *cr) 1377 { 1378 dev_t dev = vfsp->vfs_dev; 1379 struct ufsvfs *ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 1380 struct fs *fs = ufsvfsp->vfs_fs; 1381 struct ulockfs *ulp = &ufsvfsp->vfs_ulockfs; 1382 struct vnode *bvp, *vp; 1383 struct buf *bp; 1384 struct inode *ip, *inext, *rip; 1385 union ihead *ih; 1386 int error, flag, i; 1387 struct lockfs lockfs; 1388 int poll_events = POLLPRI; 1389 extern struct pollhead ufs_pollhd; 1390 refstr_t *mountpoint; 1391 1392 ASSERT(vfs_lock_held(vfsp)); 1393 1394 if (secpolicy_fs_unmount(cr, vfsp) != 0) 1395 return (EPERM); 1396 /* 1397 * Forced unmount is now supported through the 1398 * lockfs protocol. 1399 */ 1400 if (fflag & MS_FORCE) { 1401 /* 1402 * Mark the filesystem as being unmounted now in 1403 * case of a forcible umount before we take any 1404 * locks inside UFS to prevent racing with a VFS_VGET() 1405 * request. Throw these VFS_VGET() requests away for 1406 * the duration of the forcible umount so they won't 1407 * use stale or even freed data later on when we're done. 1408 * It may happen that the VFS has had a additional hold 1409 * placed on it by someone other than UFS and thus will 1410 * not get freed immediately once we're done with the 1411 * umount by dounmount() - use VFS_UNMOUNTED to inform 1412 * users of this still-alive VFS that its corresponding 1413 * filesystem being gone so they can detect that and error 1414 * out. 1415 */ 1416 vfsp->vfs_flag |= VFS_UNMOUNTED; 1417 1418 ufs_thread_suspend(&ufsvfsp->vfs_delete); 1419 mutex_enter(&ulp->ul_lock); 1420 /* 1421 * If file system is already hard locked, 1422 * unmount the file system, otherwise 1423 * hard lock it before unmounting. 1424 */ 1425 if (!ULOCKFS_IS_HLOCK(ulp)) { 1426 atomic_add_long(&ufs_quiesce_pend, 1); 1427 lockfs.lf_lock = LOCKFS_HLOCK; 1428 lockfs.lf_flags = 0; 1429 lockfs.lf_key = ulp->ul_lockfs.lf_key + 1; 1430 lockfs.lf_comlen = 0; 1431 lockfs.lf_comment = NULL; 1432 ufs_freeze(ulp, &lockfs); 1433 ULOCKFS_SET_BUSY(ulp); 1434 LOCKFS_SET_BUSY(&ulp->ul_lockfs); 1435 (void) ufs_quiesce(ulp); 1436 (void) ufs_flush(vfsp); 1437 (void) ufs_thaw(vfsp, ufsvfsp, ulp); 1438 atomic_add_long(&ufs_quiesce_pend, -1); 1439 ULOCKFS_CLR_BUSY(ulp); 1440 LOCKFS_CLR_BUSY(&ulp->ul_lockfs); 1441 poll_events |= POLLERR; 1442 pollwakeup(&ufs_pollhd, poll_events); 1443 } 1444 ufs_thread_continue(&ufsvfsp->vfs_delete); 1445 mutex_exit(&ulp->ul_lock); 1446 } 1447 1448 /* let all types of writes go through */ 1449 ufsvfsp->vfs_iotstamp = lbolt; 1450 1451 /* coordinate with global hlock thread */ 1452 if (TRANS_ISTRANS(ufsvfsp) && (ufsvfsp->vfs_validfs == UT_HLOCKING)) { 1453 /* 1454 * last possibility for a forced umount to fail hence clear 1455 * VFS_UNMOUNTED if appropriate. 1456 */ 1457 if (fflag & MS_FORCE) 1458 vfsp->vfs_flag &= ~VFS_UNMOUNTED; 1459 return (EAGAIN); 1460 } 1461 1462 ufsvfsp->vfs_validfs = UT_UNMOUNTED; 1463 1464 /* kill the reclaim thread */ 1465 ufs_thread_exit(&ufsvfsp->vfs_reclaim); 1466 1467 /* suspend the delete thread */ 1468 ufs_thread_suspend(&ufsvfsp->vfs_delete); 1469 1470 /* 1471 * drain the delete and idle queues 1472 */ 1473 ufs_delete_drain(vfsp, -1, 1); 1474 ufs_idle_drain(vfsp); 1475 1476 /* 1477 * use the lockfs protocol to prevent new ops from starting 1478 * a forcible umount can not fail beyond this point as 1479 * we hard-locked the filesystem and drained all current consumers 1480 * before. 1481 */ 1482 mutex_enter(&ulp->ul_lock); 1483 1484 /* 1485 * if the file system is busy; return EBUSY 1486 */ 1487 if (ulp->ul_vnops_cnt || ulp->ul_falloc_cnt || ULOCKFS_IS_SLOCK(ulp)) { 1488 error = EBUSY; 1489 goto out; 1490 } 1491 1492 /* 1493 * if this is not a forced unmount (!hard/error locked), then 1494 * get rid of every inode except the root and quota inodes 1495 * also, commit any outstanding transactions 1496 */ 1497 if (!ULOCKFS_IS_HLOCK(ulp) && !ULOCKFS_IS_ELOCK(ulp)) 1498 if (error = ufs_flush(vfsp)) 1499 goto out; 1500 1501 /* 1502 * ignore inodes in the cache if fs is hard locked or error locked 1503 */ 1504 rip = VTOI(ufsvfsp->vfs_root); 1505 if (!ULOCKFS_IS_HLOCK(ulp) && !ULOCKFS_IS_ELOCK(ulp)) { 1506 /* 1507 * Otherwise, only the quota and root inodes are in the cache. 1508 * 1509 * Avoid racing with ufs_update() and ufs_sync(). 1510 */ 1511 mutex_enter(&ufs_scan_lock); 1512 1513 for (i = 0, ih = ihead; i < inohsz; i++, ih++) { 1514 mutex_enter(&ih_lock[i]); 1515 for (ip = ih->ih_chain[0]; 1516 ip != (struct inode *)ih; 1517 ip = ip->i_forw) { 1518 if (ip->i_ufsvfs != ufsvfsp) 1519 continue; 1520 if (ip == ufsvfsp->vfs_qinod) 1521 continue; 1522 if (ip == rip && ITOV(ip)->v_count == 1) 1523 continue; 1524 mutex_exit(&ih_lock[i]); 1525 mutex_exit(&ufs_scan_lock); 1526 error = EBUSY; 1527 goto out; 1528 } 1529 mutex_exit(&ih_lock[i]); 1530 } 1531 mutex_exit(&ufs_scan_lock); 1532 } 1533 1534 /* 1535 * if a snapshot exists and this is a forced unmount, then delete 1536 * the snapshot. Otherwise return EBUSY. This will insure the 1537 * snapshot always belongs to a valid file system. 1538 */ 1539 if (ufsvfsp->vfs_snapshot) { 1540 if (ULOCKFS_IS_HLOCK(ulp) || ULOCKFS_IS_ELOCK(ulp)) { 1541 (void) fssnap_delete(&ufsvfsp->vfs_snapshot); 1542 } else { 1543 error = EBUSY; 1544 goto out; 1545 } 1546 } 1547 1548 /* 1549 * Close the quota file and invalidate anything left in the quota 1550 * cache for this file system. Pass kcred to allow all quota 1551 * manipulations. 1552 */ 1553 (void) closedq(ufsvfsp, kcred); 1554 invalidatedq(ufsvfsp); 1555 /* 1556 * drain the delete and idle queues 1557 */ 1558 ufs_delete_drain(vfsp, -1, 0); 1559 ufs_idle_drain(vfsp); 1560 1561 /* 1562 * discard the inodes for this fs (including root, shadow, and quota) 1563 */ 1564 for (i = 0, ih = ihead; i < inohsz; i++, ih++) { 1565 mutex_enter(&ih_lock[i]); 1566 for (inext = 0, ip = ih->ih_chain[0]; 1567 ip != (struct inode *)ih; 1568 ip = inext) { 1569 inext = ip->i_forw; 1570 if (ip->i_ufsvfs != ufsvfsp) 1571 continue; 1572 1573 /* 1574 * We've found the inode in the cache and as we 1575 * hold the hash mutex the inode can not 1576 * disappear from underneath us. 1577 * We also know it must have at least a vnode 1578 * reference count of 1. 1579 * We perform an additional VN_HOLD so the VN_RELE 1580 * in case we take the inode off the idle queue 1581 * can not be the last one. 1582 * It is safe to grab the writer contents lock here 1583 * to prevent a race with ufs_iinactive() putting 1584 * inodes into the idle queue while we operate on 1585 * this inode. 1586 */ 1587 rw_enter(&ip->i_contents, RW_WRITER); 1588 1589 vp = ITOV(ip); 1590 VN_HOLD(vp) 1591 remque(ip); 1592 if (ufs_rmidle(ip)) 1593 VN_RELE(vp); 1594 ufs_si_del(ip); 1595 /* 1596 * rip->i_ufsvfsp is needed by bflush() 1597 */ 1598 if (ip != rip) 1599 ip->i_ufsvfs = NULL; 1600 /* 1601 * Set vnode's vfsops to dummy ops, which return 1602 * EIO. This is needed to forced unmounts to work 1603 * with lofs/nfs properly. 1604 */ 1605 if (ULOCKFS_IS_HLOCK(ulp) || ULOCKFS_IS_ELOCK(ulp)) 1606 vp->v_vfsp = &EIO_vfs; 1607 else 1608 vp->v_vfsp = NULL; 1609 vp->v_type = VBAD; 1610 1611 rw_exit(&ip->i_contents); 1612 1613 VN_RELE(vp); 1614 } 1615 mutex_exit(&ih_lock[i]); 1616 } 1617 ufs_si_cache_flush(dev); 1618 1619 /* 1620 * kill the delete thread and drain the idle queue 1621 */ 1622 ufs_thread_exit(&ufsvfsp->vfs_delete); 1623 ufs_idle_drain(vfsp); 1624 1625 bp = ufsvfsp->vfs_bufp; 1626 bvp = ufsvfsp->vfs_devvp; 1627 flag = !fs->fs_ronly; 1628 if (flag) { 1629 bflush(dev); 1630 if (fs->fs_clean != FSBAD) { 1631 if (fs->fs_clean == FSSTABLE) 1632 fs->fs_clean = FSCLEAN; 1633 fs->fs_reclaim &= ~FS_RECLAIM; 1634 } 1635 if (TRANS_ISTRANS(ufsvfsp) && 1636 !TRANS_ISERROR(ufsvfsp) && 1637 !ULOCKFS_IS_HLOCK(ulp) && 1638 (fs->fs_rolled == FS_NEED_ROLL)) { 1639 /* 1640 * ufs_flush() above has flushed the last Moby. 1641 * This is needed to ensure the following superblock 1642 * update really is the last metadata update 1643 */ 1644 error = ufs_putsummaryinfo(dev, ufsvfsp, fs); 1645 if (error == 0) { 1646 fs->fs_rolled = FS_ALL_ROLLED; 1647 } 1648 } 1649 TRANS_SBUPDATE(ufsvfsp, vfsp, TOP_SBUPDATE_UNMOUNT); 1650 /* 1651 * push this last transaction 1652 */ 1653 curthread->t_flag |= T_DONTBLOCK; 1654 TRANS_BEGIN_SYNC(ufsvfsp, TOP_COMMIT_UNMOUNT, TOP_COMMIT_SIZE, 1655 error); 1656 if (!error) 1657 TRANS_END_SYNC(ufsvfsp, error, TOP_COMMIT_UNMOUNT, 1658 TOP_COMMIT_SIZE); 1659 curthread->t_flag &= ~T_DONTBLOCK; 1660 } 1661 1662 TRANS_MATA_UMOUNT(ufsvfsp); 1663 lufs_unsnarf(ufsvfsp); /* Release the in-memory structs */ 1664 ufsfx_unmount(ufsvfsp); /* fix-on-panic bookkeeping */ 1665 kmem_free(fs->fs_u.fs_csp, fs->fs_cssize); 1666 1667 bp->b_flags |= B_STALE|B_AGE; 1668 ufsvfsp->vfs_bufp = NULL; /* don't point at freed buf */ 1669 brelse(bp); /* free the superblock buf */ 1670 1671 (void) VOP_PUTPAGE(common_specvp(bvp), (offset_t)0, (size_t)0, 1672 B_INVAL, cr, NULL); 1673 (void) VOP_CLOSE(bvp, flag, 1, (offset_t)0, cr, NULL); 1674 bflush(dev); 1675 (void) bfinval(dev, 1); 1676 VN_RELE(bvp); 1677 1678 /* 1679 * It is now safe to NULL out the ufsvfs pointer and discard 1680 * the root inode. 1681 */ 1682 rip->i_ufsvfs = NULL; 1683 VN_RELE(ITOV(rip)); 1684 1685 /* free up lockfs comment structure, if any */ 1686 if (ulp->ul_lockfs.lf_comlen && ulp->ul_lockfs.lf_comment) 1687 kmem_free(ulp->ul_lockfs.lf_comment, ulp->ul_lockfs.lf_comlen); 1688 1689 /* 1690 * Remove from instance list. 1691 */ 1692 ufs_vfs_remove(ufsvfsp); 1693 1694 /* 1695 * For a forcible unmount, threads may be asleep in 1696 * ufs_lockfs_begin/ufs_check_lockfs. These threads will need 1697 * the ufsvfs structure so we don't free it, yet. ufs_update 1698 * will free it up after awhile. 1699 */ 1700 if (ULOCKFS_IS_HLOCK(ulp) || ULOCKFS_IS_ELOCK(ulp)) { 1701 extern kmutex_t ufsvfs_mutex; 1702 extern struct ufsvfs *ufsvfslist; 1703 1704 mutex_enter(&ufsvfs_mutex); 1705 ufsvfsp->vfs_dontblock = 1; 1706 ufsvfsp->vfs_next = ufsvfslist; 1707 ufsvfslist = ufsvfsp; 1708 mutex_exit(&ufsvfs_mutex); 1709 /* wakeup any suspended threads */ 1710 cv_broadcast(&ulp->ul_cv); 1711 mutex_exit(&ulp->ul_lock); 1712 } else { 1713 mutex_destroy(&ufsvfsp->vfs_lock); 1714 kmem_free(ufsvfsp, sizeof (struct ufsvfs)); 1715 } 1716 1717 /* 1718 * Now mark the filesystem as unmounted since we're done with it. 1719 */ 1720 vfsp->vfs_flag |= VFS_UNMOUNTED; 1721 1722 return (0); 1723 out: 1724 /* open the fs to new ops */ 1725 cv_broadcast(&ulp->ul_cv); 1726 mutex_exit(&ulp->ul_lock); 1727 1728 if (TRANS_ISTRANS(ufsvfsp)) { 1729 /* allow the delete thread to continue */ 1730 ufs_thread_continue(&ufsvfsp->vfs_delete); 1731 /* restart the reclaim thread */ 1732 ufs_thread_start(&ufsvfsp->vfs_reclaim, ufs_thread_reclaim, 1733 vfsp); 1734 /* coordinate with global hlock thread */ 1735 ufsvfsp->vfs_validfs = UT_MOUNTED; 1736 /* check for trans errors during umount */ 1737 ufs_trans_onerror(); 1738 1739 /* 1740 * if we have a separate /usr it will never unmount 1741 * when halting. In order to not re-read all the 1742 * cylinder group summary info on mounting after 1743 * reboot the logging of summary info is re-enabled 1744 * and the super block written out. 1745 */ 1746 mountpoint = vfs_getmntpoint(vfsp); 1747 if ((fs->fs_si == FS_SI_OK) && 1748 (strcmp("/usr", refstr_value(mountpoint)) == 0)) { 1749 ufsvfsp->vfs_nolog_si = 0; 1750 UFS_BWRITE2(NULL, ufsvfsp->vfs_bufp); 1751 } 1752 refstr_rele(mountpoint); 1753 } 1754 1755 return (error); 1756 } 1757 1758 static int 1759 ufs_root(struct vfs *vfsp, struct vnode **vpp) 1760 { 1761 struct ufsvfs *ufsvfsp; 1762 struct vnode *vp; 1763 1764 if (!vfsp) 1765 return (EIO); 1766 1767 ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 1768 if (!ufsvfsp || !ufsvfsp->vfs_root) 1769 return (EIO); /* forced unmount */ 1770 1771 vp = ufsvfsp->vfs_root; 1772 VN_HOLD(vp); 1773 *vpp = vp; 1774 return (0); 1775 } 1776 1777 /* 1778 * Get file system statistics. 1779 */ 1780 static int 1781 ufs_statvfs(struct vfs *vfsp, struct statvfs64 *sp) 1782 { 1783 struct fs *fsp; 1784 struct ufsvfs *ufsvfsp; 1785 int blk, i; 1786 long max_avail, used; 1787 dev32_t d32; 1788 1789 if (vfsp->vfs_flag & VFS_UNMOUNTED) 1790 return (EIO); 1791 1792 ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 1793 fsp = ufsvfsp->vfs_fs; 1794 if ((fsp->fs_magic != FS_MAGIC) && (fsp->fs_magic != MTB_UFS_MAGIC)) 1795 return (EINVAL); 1796 if (fsp->fs_magic == FS_MAGIC && 1797 (fsp->fs_version != UFS_EFISTYLE4NONEFI_VERSION_2 && 1798 fsp->fs_version != UFS_VERSION_MIN)) 1799 return (EINVAL); 1800 if (fsp->fs_magic == MTB_UFS_MAGIC && 1801 (fsp->fs_version > MTB_UFS_VERSION_1 || 1802 fsp->fs_version < MTB_UFS_VERSION_MIN)) 1803 return (EINVAL); 1804 1805 /* 1806 * get the basic numbers 1807 */ 1808 (void) bzero(sp, sizeof (*sp)); 1809 1810 sp->f_bsize = fsp->fs_bsize; 1811 sp->f_frsize = fsp->fs_fsize; 1812 sp->f_blocks = (fsblkcnt64_t)fsp->fs_dsize; 1813 sp->f_bfree = (fsblkcnt64_t)fsp->fs_cstotal.cs_nbfree * fsp->fs_frag + 1814 fsp->fs_cstotal.cs_nffree; 1815 1816 sp->f_files = (fsfilcnt64_t)fsp->fs_ncg * fsp->fs_ipg; 1817 sp->f_ffree = (fsfilcnt64_t)fsp->fs_cstotal.cs_nifree; 1818 1819 /* 1820 * Adjust the numbers based on things waiting to be deleted. 1821 * modifies f_bfree and f_ffree. Afterwards, everything we 1822 * come up with will be self-consistent. By definition, this 1823 * is a point-in-time snapshot, so the fact that the delete 1824 * thread's probably already invalidated the results is not a 1825 * problem. Note that if the delete thread is ever extended to 1826 * non-logging ufs, this adjustment must always be made. 1827 */ 1828 if (TRANS_ISTRANS(ufsvfsp)) 1829 ufs_delete_adjust_stats(ufsvfsp, sp); 1830 1831 /* 1832 * avail = MAX(max_avail - used, 0) 1833 */ 1834 max_avail = fsp->fs_dsize - ufsvfsp->vfs_minfrags; 1835 1836 used = (fsp->fs_dsize - sp->f_bfree); 1837 1838 if (max_avail > used) 1839 sp->f_bavail = (fsblkcnt64_t)max_avail - used; 1840 else 1841 sp->f_bavail = (fsblkcnt64_t)0; 1842 1843 sp->f_favail = sp->f_ffree; 1844 (void) cmpldev(&d32, vfsp->vfs_dev); 1845 sp->f_fsid = d32; 1846 (void) strcpy(sp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); 1847 sp->f_flag = vf_to_stf(vfsp->vfs_flag); 1848 1849 /* keep coordinated with ufs_l_pathconf() */ 1850 sp->f_namemax = MAXNAMLEN; 1851 1852 if (fsp->fs_cpc == 0) { 1853 bzero(sp->f_fstr, 14); 1854 return (0); 1855 } 1856 blk = fsp->fs_spc * fsp->fs_cpc / NSPF(fsp); 1857 for (i = 0; i < blk; i += fsp->fs_frag) /* CSTYLED */ 1858 /* void */; 1859 i -= fsp->fs_frag; 1860 blk = i / fsp->fs_frag; 1861 bcopy(&(fs_rotbl(fsp)[blk]), sp->f_fstr, 14); 1862 return (0); 1863 } 1864 1865 /* 1866 * Flush any pending I/O to file system vfsp. 1867 * The ufs_update() routine will only flush *all* ufs files. 1868 * If vfsp is non-NULL, only sync this ufs (in preparation 1869 * for a umount). 1870 */ 1871 /*ARGSUSED*/ 1872 static int 1873 ufs_sync(struct vfs *vfsp, short flag, struct cred *cr) 1874 { 1875 struct ufsvfs *ufsvfsp; 1876 struct fs *fs; 1877 int cheap = flag & SYNC_ATTR; 1878 int error; 1879 1880 /* 1881 * SYNC_CLOSE means we're rebooting. Toss everything 1882 * on the idle queue so we don't have to slog through 1883 * a bunch of uninteresting inodes over and over again. 1884 */ 1885 if (flag & SYNC_CLOSE) 1886 ufs_idle_drain(NULL); 1887 1888 if (vfsp == NULL) { 1889 ufs_update(flag); 1890 return (0); 1891 } 1892 1893 /* Flush a single ufs */ 1894 if (!vfs_matchops(vfsp, ufs_vfsops) || vfs_lock(vfsp) != 0) 1895 return (0); 1896 1897 ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 1898 if (!ufsvfsp) 1899 return (EIO); 1900 fs = ufsvfsp->vfs_fs; 1901 mutex_enter(&ufsvfsp->vfs_lock); 1902 1903 if (ufsvfsp->vfs_dio && 1904 fs->fs_ronly == 0 && 1905 fs->fs_clean != FSBAD && 1906 fs->fs_clean != FSLOG) { 1907 /* turn off fast-io on unmount, so no fsck needed (4029401) */ 1908 ufsvfsp->vfs_dio = 0; 1909 fs->fs_clean = FSACTIVE; 1910 fs->fs_fmod = 1; 1911 } 1912 1913 /* Write back modified superblock */ 1914 if (fs->fs_fmod == 0) { 1915 mutex_exit(&ufsvfsp->vfs_lock); 1916 } else { 1917 if (fs->fs_ronly != 0) { 1918 mutex_exit(&ufsvfsp->vfs_lock); 1919 vfs_unlock(vfsp); 1920 return (ufs_fault(ufsvfsp->vfs_root, 1921 "fs = %s update: ro fs mod\n", fs->fs_fsmnt)); 1922 } 1923 fs->fs_fmod = 0; 1924 mutex_exit(&ufsvfsp->vfs_lock); 1925 1926 TRANS_SBUPDATE(ufsvfsp, vfsp, TOP_SBUPDATE_UPDATE); 1927 } 1928 vfs_unlock(vfsp); 1929 1930 /* 1931 * Avoid racing with ufs_update() and ufs_unmount(). 1932 * 1933 */ 1934 mutex_enter(&ufs_scan_lock); 1935 1936 (void) ufs_scan_inodes(1, ufs_sync_inode, 1937 (void *)(uintptr_t)cheap, ufsvfsp); 1938 1939 mutex_exit(&ufs_scan_lock); 1940 1941 bflush((dev_t)vfsp->vfs_dev); 1942 1943 /* 1944 * commit any outstanding async transactions 1945 */ 1946 curthread->t_flag |= T_DONTBLOCK; 1947 TRANS_BEGIN_SYNC(ufsvfsp, TOP_COMMIT_UPDATE, TOP_COMMIT_SIZE, error); 1948 if (!error) { 1949 TRANS_END_SYNC(ufsvfsp, error, TOP_COMMIT_UPDATE, 1950 TOP_COMMIT_SIZE); 1951 } 1952 curthread->t_flag &= ~T_DONTBLOCK; 1953 1954 return (0); 1955 } 1956 1957 1958 void 1959 sbupdate(struct vfs *vfsp) 1960 { 1961 struct ufsvfs *ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 1962 struct fs *fs = ufsvfsp->vfs_fs; 1963 struct buf *bp; 1964 int blks; 1965 caddr_t space; 1966 int i; 1967 size_t size; 1968 1969 /* 1970 * for ulockfs processing, limit the superblock writes 1971 */ 1972 if ((ufsvfsp->vfs_ulockfs.ul_sbowner) && 1973 (curthread != ufsvfsp->vfs_ulockfs.ul_sbowner)) { 1974 /* process later */ 1975 fs->fs_fmod = 1; 1976 return; 1977 } 1978 ULOCKFS_SET_MOD((&ufsvfsp->vfs_ulockfs)); 1979 1980 if (TRANS_ISTRANS(ufsvfsp)) { 1981 mutex_enter(&ufsvfsp->vfs_lock); 1982 ufs_sbwrite(ufsvfsp); 1983 mutex_exit(&ufsvfsp->vfs_lock); 1984 return; 1985 } 1986 1987 blks = howmany(fs->fs_cssize, fs->fs_fsize); 1988 space = (caddr_t)fs->fs_u.fs_csp; 1989 for (i = 0; i < blks; i += fs->fs_frag) { 1990 size = fs->fs_bsize; 1991 if (i + fs->fs_frag > blks) 1992 size = (blks - i) * fs->fs_fsize; 1993 bp = UFS_GETBLK(ufsvfsp, ufsvfsp->vfs_dev, 1994 (daddr_t)(fsbtodb(fs, fs->fs_csaddr + i)), 1995 fs->fs_bsize); 1996 bcopy(space, bp->b_un.b_addr, size); 1997 space += size; 1998 bp->b_bcount = size; 1999 UFS_BRWRITE(ufsvfsp, bp); 2000 } 2001 mutex_enter(&ufsvfsp->vfs_lock); 2002 ufs_sbwrite(ufsvfsp); 2003 mutex_exit(&ufsvfsp->vfs_lock); 2004 } 2005 2006 int ufs_vget_idle_count = 2; /* Number of inodes to idle each time */ 2007 static int 2008 ufs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) 2009 { 2010 int error = 0; 2011 struct ufid *ufid; 2012 struct inode *ip; 2013 struct ufsvfs *ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 2014 struct ulockfs *ulp; 2015 2016 /* 2017 * Check for unmounted filesystem. 2018 */ 2019 if (vfsp->vfs_flag & VFS_UNMOUNTED) { 2020 error = EIO; 2021 goto errout; 2022 } 2023 2024 /* 2025 * Keep the idle queue from getting too long by 2026 * idling an inode before attempting to allocate another. 2027 * This operation must be performed before entering 2028 * lockfs or a transaction. 2029 */ 2030 if (ufs_idle_q.uq_ne > ufs_idle_q.uq_hiwat) 2031 if ((curthread->t_flag & T_DONTBLOCK) == 0) { 2032 ins.in_vidles.value.ul += ufs_vget_idle_count; 2033 ufs_idle_some(ufs_vget_idle_count); 2034 } 2035 2036 ufid = (struct ufid *)fidp; 2037 2038 if (error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_VGET_MASK)) 2039 goto errout; 2040 2041 rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 2042 2043 error = ufs_iget(vfsp, ufid->ufid_ino, &ip, CRED()); 2044 2045 rw_exit(&ufsvfsp->vfs_dqrwlock); 2046 2047 ufs_lockfs_end(ulp); 2048 2049 if (error) 2050 goto errout; 2051 2052 /* 2053 * Check if the inode has been deleted or freed or is in transient state 2054 * since the last VFS_VGET() request for it, release it and don't return 2055 * it to the caller, presumably NFS, as it's no longer valid. 2056 */ 2057 if (ip->i_gen != ufid->ufid_gen || ip->i_mode == 0 || 2058 (ip->i_flag & IDEL)) { 2059 VN_RELE(ITOV(ip)); 2060 error = EINVAL; 2061 goto errout; 2062 } 2063 2064 *vpp = ITOV(ip); 2065 return (0); 2066 2067 errout: 2068 *vpp = NULL; 2069 return (error); 2070 } 2071 2072 static int 2073 ufsinit(int fstype, char *name) 2074 { 2075 static const fs_operation_def_t ufs_vfsops_template[] = { 2076 VFSNAME_MOUNT, { .vfs_mount = ufs_mount }, 2077 VFSNAME_UNMOUNT, { .vfs_unmount = ufs_unmount }, 2078 VFSNAME_ROOT, { .vfs_root = ufs_root }, 2079 VFSNAME_STATVFS, { .vfs_statvfs = ufs_statvfs }, 2080 VFSNAME_SYNC, { .vfs_sync = ufs_sync }, 2081 VFSNAME_VGET, { .vfs_vget = ufs_vget }, 2082 VFSNAME_MOUNTROOT, { .vfs_mountroot = ufs_mountroot }, 2083 NULL, NULL 2084 }; 2085 int error; 2086 2087 ufsfstype = fstype; 2088 2089 error = vfs_setfsops(fstype, ufs_vfsops_template, &ufs_vfsops); 2090 if (error != 0) { 2091 cmn_err(CE_WARN, "ufsinit: bad vfs ops template"); 2092 return (error); 2093 } 2094 2095 error = vn_make_ops(name, ufs_vnodeops_template, &ufs_vnodeops); 2096 if (error != 0) { 2097 (void) vfs_freevfsops_by_type(fstype); 2098 cmn_err(CE_WARN, "ufsinit: bad vnode ops template"); 2099 return (error); 2100 } 2101 2102 ufs_iinit(); 2103 return (0); 2104 } 2105 2106 #ifdef __sparc 2107 2108 /* 2109 * Mounting a mirrored SVM volume is only supported on ufs, 2110 * this is special-case boot code to support that configuration. 2111 * At this point, we have booted and mounted root on a 2112 * single component of the mirror. Complete the boot 2113 * by configuring SVM and converting the root to the 2114 * dev_t of the mirrored root device. This dev_t conversion 2115 * only works because the underlying device doesn't change. 2116 */ 2117 int 2118 ufs_remountroot(struct vfs *vfsp) 2119 { 2120 struct ufsvfs *ufsvfsp; 2121 struct ulockfs *ulp; 2122 dev_t new_rootdev; 2123 dev_t old_rootdev; 2124 struct vnode *old_rootvp; 2125 struct vnode *new_rootvp; 2126 int error, sberror = 0; 2127 struct inode *ip; 2128 union ihead *ih; 2129 struct buf *bp; 2130 int i; 2131 2132 old_rootdev = rootdev; 2133 old_rootvp = rootvp; 2134 2135 new_rootdev = getrootdev(); 2136 if (new_rootdev == (dev_t)NODEV) { 2137 return (ENODEV); 2138 } 2139 2140 new_rootvp = makespecvp(new_rootdev, VBLK); 2141 2142 error = VOP_OPEN(&new_rootvp, 2143 (vfsp->vfs_flag & VFS_RDONLY) ? FREAD : FREAD|FWRITE, CRED(), NULL); 2144 if (error) { 2145 cmn_err(CE_CONT, 2146 "Cannot open mirrored root device, error %d\n", error); 2147 return (error); 2148 } 2149 2150 if (vfs_lock(vfsp) != 0) { 2151 return (EBUSY); 2152 } 2153 2154 ufsvfsp = (struct ufsvfs *)vfsp->vfs_data; 2155 ulp = &ufsvfsp->vfs_ulockfs; 2156 2157 mutex_enter(&ulp->ul_lock); 2158 atomic_add_long(&ufs_quiesce_pend, 1); 2159 2160 (void) ufs_quiesce(ulp); 2161 (void) ufs_flush(vfsp); 2162 2163 /* 2164 * Convert root vfs to new dev_t, including vfs hash 2165 * table and fs id. 2166 */ 2167 vfs_root_redev(vfsp, new_rootdev, ufsfstype); 2168 2169 ufsvfsp->vfs_devvp = new_rootvp; 2170 ufsvfsp->vfs_dev = new_rootdev; 2171 2172 bp = ufsvfsp->vfs_bufp; 2173 bp->b_edev = new_rootdev; 2174 bp->b_dev = cmpdev(new_rootdev); 2175 2176 /* 2177 * The buffer for the root inode does not contain a valid b_vp 2178 */ 2179 (void) bfinval(new_rootdev, 0); 2180 2181 /* 2182 * Here we hand-craft inodes with old root device 2183 * references to refer to the new device instead. 2184 */ 2185 mutex_enter(&ufs_scan_lock); 2186 2187 for (i = 0, ih = ihead; i < inohsz; i++, ih++) { 2188 mutex_enter(&ih_lock[i]); 2189 for (ip = ih->ih_chain[0]; 2190 ip != (struct inode *)ih; 2191 ip = ip->i_forw) { 2192 if (ip->i_ufsvfs != ufsvfsp) 2193 continue; 2194 if (ip == ufsvfsp->vfs_qinod) 2195 continue; 2196 if (ip->i_dev == old_rootdev) { 2197 ip->i_dev = new_rootdev; 2198 } 2199 2200 if (ip->i_devvp == old_rootvp) { 2201 ip->i_devvp = new_rootvp; 2202 } 2203 } 2204 mutex_exit(&ih_lock[i]); 2205 } 2206 2207 mutex_exit(&ufs_scan_lock); 2208 2209 /* 2210 * Make Sure logging structures are using the new device 2211 * if logging is enabled. Also start any logging thread that 2212 * needs to write to the device and couldn't earlier. 2213 */ 2214 if (ufsvfsp->vfs_log) { 2215 buf_t *bp, *tbp; 2216 ml_unit_t *ul = ufsvfsp->vfs_log; 2217 struct fs *fsp = ufsvfsp->vfs_fs; 2218 2219 /* 2220 * Update the main logging structure. 2221 */ 2222 ul->un_dev = new_rootdev; 2223 2224 /* 2225 * Get a new bp for the on disk structures. 2226 */ 2227 bp = ul->un_bp; 2228 tbp = ngeteblk(dbtob(LS_SECTORS)); 2229 tbp->b_edev = new_rootdev; 2230 tbp->b_dev = cmpdev(new_rootdev); 2231 tbp->b_blkno = bp->b_blkno; 2232 bcopy(bp->b_un.b_addr, tbp->b_un.b_addr, DEV_BSIZE); 2233 bcopy(bp->b_un.b_addr, tbp->b_un.b_addr + DEV_BSIZE, DEV_BSIZE); 2234 bp->b_flags |= (B_STALE | B_AGE); 2235 brelse(bp); 2236 ul->un_bp = tbp; 2237 2238 /* 2239 * Allocate new circular buffers. 2240 */ 2241 alloc_rdbuf(&ul->un_rdbuf, MAPBLOCKSIZE, MAPBLOCKSIZE); 2242 alloc_wrbuf(&ul->un_wrbuf, ldl_bufsize(ul)); 2243 2244 /* 2245 * Clear the noroll bit which indicates that logging 2246 * can't roll the log yet and start the logmap roll thread 2247 * unless the filesystem is still read-only in which case 2248 * remountfs() will do it when going to read-write. 2249 */ 2250 ASSERT(ul->un_flags & LDL_NOROLL); 2251 2252 if (!fsp->fs_ronly) { 2253 ul->un_flags &= ~LDL_NOROLL; 2254 logmap_start_roll(ul); 2255 } 2256 2257 /* 2258 * Start the reclaim thread if needed. 2259 */ 2260 if (!fsp->fs_ronly && (fsp->fs_reclaim & 2261 (FS_RECLAIM|FS_RECLAIMING))) { 2262 fsp->fs_reclaim &= ~FS_RECLAIM; 2263 fsp->fs_reclaim |= FS_RECLAIMING; 2264 ufs_thread_start(&ufsvfsp->vfs_reclaim, 2265 ufs_thread_reclaim, vfsp); 2266 TRANS_SBWRITE(ufsvfsp, TOP_SBUPDATE_UPDATE); 2267 if (sberror = geterror(ufsvfsp->vfs_bufp)) { 2268 refstr_t *mntpt; 2269 mntpt = vfs_getmntpoint(vfsp); 2270 cmn_err(CE_WARN, 2271 "Remountroot failed to update Reclaim" 2272 "state for filesystem %s " 2273 "Error writing SuperBlock %d", 2274 refstr_value(mntpt), error); 2275 refstr_rele(mntpt); 2276 } 2277 } 2278 } 2279 2280 rootdev = new_rootdev; 2281 rootvp = new_rootvp; 2282 2283 atomic_add_long(&ufs_quiesce_pend, -1); 2284 cv_broadcast(&ulp->ul_cv); 2285 mutex_exit(&ulp->ul_lock); 2286 2287 vfs_unlock(vfsp); 2288 2289 error = VOP_CLOSE(old_rootvp, FREAD, 1, (offset_t)0, CRED(), NULL); 2290 if (error) { 2291 cmn_err(CE_CONT, 2292 "close of root device component failed, error %d\n", 2293 error); 2294 } 2295 VN_RELE(old_rootvp); 2296 2297 return (sberror ? sberror : error); 2298 } 2299 2300 #endif /* __sparc */ 2301