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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * VFS operations for High Sierra filesystem 30 */ 31 32 #include <sys/types.h> 33 #include <sys/isa_defs.h> 34 #include <sys/t_lock.h> 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/sysmacros.h> 38 #include <sys/kmem.h> 39 #include <sys/signal.h> 40 #include <sys/user.h> 41 #include <sys/proc.h> 42 #include <sys/disp.h> 43 #include <sys/buf.h> 44 #include <sys/pathname.h> 45 #include <sys/vfs.h> 46 #include <sys/vfs_opreg.h> 47 #include <sys/vnode.h> 48 #include <sys/file.h> 49 #include <sys/uio.h> 50 #include <sys/conf.h> 51 #include <sys/policy.h> 52 53 #include <vm/page.h> 54 55 #include <sys/fs/snode.h> 56 #include <sys/fs/hsfs_spec.h> 57 #include <sys/fs/hsfs_isospec.h> 58 #include <sys/fs/hsfs_node.h> 59 #include <sys/fs/hsfs_impl.h> 60 #include <sys/fs/hsfs_susp.h> 61 #include <sys/fs/hsfs_rrip.h> 62 63 #include <sys/statvfs.h> 64 #include <sys/mount.h> 65 #include <sys/mntent.h> 66 #include <sys/swap.h> 67 #include <sys/errno.h> 68 #include <sys/debug.h> 69 #include "fs/fs_subr.h" 70 #include <sys/cmn_err.h> 71 #include <sys/bootconf.h> 72 73 #include <sys/sdt.h> 74 75 /* 76 * These are needed for the CDROMREADOFFSET Code 77 */ 78 #include <sys/cdio.h> 79 #include <sys/sunddi.h> 80 81 #define HSFS_CLKSET 82 83 #include <sys/modctl.h> 84 85 /* 86 * Options for mount. 87 */ 88 #define HOPT_GLOBAL MNTOPT_GLOBAL 89 #define HOPT_NOGLOBAL MNTOPT_NOGLOBAL 90 #define HOPT_MAPLCASE "maplcase" 91 #define HOPT_NOMAPLCASE "nomaplcase" 92 #define HOPT_NOTRAILDOT "notraildot" 93 #define HOPT_TRAILDOT "traildot" 94 #define HOPT_NRR "nrr" 95 #define HOPT_RR "rr" 96 #define HOPT_JOLIET "joliet" 97 #define HOPT_NOJOLIET "nojoliet" 98 #define HOPT_JOLIETLONG "jolietlong" 99 #define HOPT_VERS2 "vers2" 100 #define HOPT_NOVERS2 "novers2" 101 #define HOPT_RO MNTOPT_RO 102 103 static char *global_cancel[] = { HOPT_NOGLOBAL, NULL }; 104 static char *noglobal_cancel[] = { HOPT_GLOBAL, NULL }; 105 static char *mapl_cancel[] = { HOPT_NOMAPLCASE, NULL }; 106 static char *nomapl_cancel[] = { HOPT_MAPLCASE, NULL }; 107 static char *ro_cancel[] = { MNTOPT_RW, NULL }; 108 static char *rr_cancel[] = { HOPT_NRR, NULL }; 109 static char *nrr_cancel[] = { HOPT_RR, NULL }; 110 static char *joliet_cancel[] = { HOPT_NOJOLIET, NULL }; 111 static char *nojoliet_cancel[] = { HOPT_JOLIET, NULL }; 112 static char *vers2_cancel[] = { HOPT_NOVERS2, NULL }; 113 static char *novers2_cancel[] = { HOPT_VERS2, NULL }; 114 static char *trail_cancel[] = { HOPT_NOTRAILDOT, NULL }; 115 static char *notrail_cancel[] = { HOPT_TRAILDOT, NULL }; 116 117 static mntopt_t hsfs_options[] = { 118 { HOPT_GLOBAL, global_cancel, NULL, 0, NULL }, 119 { HOPT_NOGLOBAL, noglobal_cancel, NULL, MO_DEFAULT, NULL }, 120 { HOPT_MAPLCASE, mapl_cancel, NULL, MO_DEFAULT, NULL }, 121 { HOPT_NOMAPLCASE, nomapl_cancel, NULL, 0, NULL }, 122 { HOPT_RO, ro_cancel, NULL, MO_DEFAULT, NULL }, 123 { HOPT_RR, rr_cancel, NULL, MO_DEFAULT, NULL }, 124 { HOPT_NRR, nrr_cancel, NULL, 0, NULL }, 125 { HOPT_JOLIET, joliet_cancel, NULL, 0, NULL }, 126 { HOPT_NOJOLIET, nojoliet_cancel, NULL, 0, NULL }, 127 { HOPT_JOLIETLONG, NULL, NULL, 0, NULL }, 128 { HOPT_VERS2, vers2_cancel, NULL, 0, NULL }, 129 { HOPT_NOVERS2, novers2_cancel, NULL, 0, NULL }, 130 { HOPT_TRAILDOT, trail_cancel, NULL, MO_DEFAULT, NULL }, 131 { HOPT_NOTRAILDOT, notrail_cancel, NULL, 0, NULL }, 132 { "sector", NULL, "0", MO_HASVALUE, NULL}, 133 }; 134 135 static mntopts_t hsfs_proto_opttbl = { 136 sizeof (hsfs_options) / sizeof (mntopt_t), 137 hsfs_options 138 }; 139 140 static int hsfsfstype; 141 static int hsfsinit(int, char *); 142 143 static vfsdef_t vfw = { 144 VFSDEF_VERSION, 145 "hsfs", 146 hsfsinit, 147 VSW_HASPROTO|VSW_STATS, /* We don't suppport remounting */ 148 &hsfs_proto_opttbl 149 }; 150 151 static struct modlfs modlfs = { 152 &mod_fsops, "filesystem for HSFS", &vfw 153 }; 154 155 static struct modlinkage modlinkage = { 156 MODREV_1, (void *)&modlfs, NULL 157 }; 158 159 char _depends_on[] = "fs/specfs"; 160 161 int 162 _init(void) 163 { 164 return (mod_install(&modlinkage)); 165 } 166 167 int 168 _fini(void) 169 { 170 int error; 171 172 error = mod_remove(&modlinkage); 173 174 DTRACE_PROBE1(mod_remove, int, error); 175 176 if (error) 177 return (error); 178 179 mutex_destroy(&hs_mounttab_lock); 180 181 /* 182 * Tear down the operations vectors 183 */ 184 (void) vfs_freevfsops_by_type(hsfsfstype); 185 vn_freevnodeops(hsfs_vnodeops); 186 187 hs_fini_hsnode_cache(); 188 return (0); 189 } 190 191 int 192 _info(struct modinfo *modinfop) 193 { 194 return (mod_info(&modlinkage, modinfop)); 195 } 196 197 #define BDEVFLAG(dev) ((devopsp[getmajor(dev)])->devo_cb_ops->cb_flag) 198 199 kmutex_t hs_mounttab_lock; 200 struct hsfs *hs_mounttab = NULL; 201 202 /* default mode, uid, gid */ 203 mode_t hsfs_default_mode = 0555; 204 uid_t hsfs_default_uid = 0; 205 gid_t hsfs_default_gid = 3; 206 207 static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 208 struct mounta *uap, struct cred *cr); 209 static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); 210 static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); 211 static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); 212 static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); 213 static int hsfs_mountroot(struct vfs *, enum whymountroot); 214 215 static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, 216 mode_t mode, int flags, struct cred *cr, int isroot); 217 static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); 218 static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, 219 struct hs_volume *hvp); 220 static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, 221 struct hs_volume *hvp); 222 static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, 223 struct hs_volume *hvp, 224 struct hs_volume *svp, 225 struct hs_volume *jvp); 226 static int hs_joliet_level(uchar_t *volp); 227 static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, 228 struct hs_volume *hvp); 229 static void hs_copylabel(struct hs_volume *, unsigned char *, int); 230 static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, 231 mode_t *mode, cred_t *cr); 232 static int hs_findvoldesc(dev_t rdev, int desc_sec); 233 234 static int 235 hsfsinit(int fstype, char *name) 236 { 237 static const fs_operation_def_t hsfs_vfsops_template[] = { 238 VFSNAME_MOUNT, { .vfs_mount = hsfs_mount }, 239 VFSNAME_UNMOUNT, { .vfs_unmount = hsfs_unmount }, 240 VFSNAME_ROOT, { .vfs_root = hsfs_root }, 241 VFSNAME_STATVFS, { .vfs_statvfs = hsfs_statvfs }, 242 VFSNAME_VGET, { .vfs_vget = hsfs_vget }, 243 VFSNAME_MOUNTROOT, { .vfs_mountroot = hsfs_mountroot }, 244 NULL, NULL 245 }; 246 int error; 247 248 error = vfs_setfsops(fstype, hsfs_vfsops_template, NULL); 249 if (error != 0) { 250 cmn_err(CE_WARN, "hsfsinit: bad vfs ops template"); 251 return (error); 252 } 253 254 error = vn_make_ops(name, hsfs_vnodeops_template, &hsfs_vnodeops); 255 if (error != 0) { 256 (void) vfs_freevfsops_by_type(fstype); 257 cmn_err(CE_WARN, "hsfsinit: bad vnode ops template"); 258 return (error); 259 } 260 261 hsfsfstype = fstype; 262 mutex_init(&hs_mounttab_lock, NULL, MUTEX_DEFAULT, NULL); 263 hs_init_hsnode_cache(); 264 return (0); 265 } 266 267 /*ARGSUSED*/ 268 static int 269 hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 270 struct mounta *uap, struct cred *cr) 271 { 272 int vnode_busy; 273 dev_t dev; 274 struct pathname dpn; 275 int error; 276 mode_t mode; 277 int flags; /* this will hold the mount specific data */ 278 279 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) 280 return (error); 281 282 if (mvp->v_type != VDIR) 283 return (ENOTDIR); 284 285 /* mount option must be read only, else mount will be rejected */ 286 if (!(uap->flags & MS_RDONLY)) 287 return (EROFS); 288 289 /* 290 * We already told the framework that we don't support remounting. 291 */ 292 ASSERT(!(uap->flags & MS_REMOUNT)); 293 294 mutex_enter(&mvp->v_lock); 295 vnode_busy = (mvp->v_count != 1) || (mvp->v_flag & VROOT); 296 mutex_exit(&mvp->v_lock); 297 298 if ((uap->flags & MS_OVERLAY) == 0 && vnode_busy) { 299 return (EBUSY); 300 } 301 302 /* 303 * Check for the options that actually affect things 304 * at our level. 305 */ 306 flags = 0; 307 if (vfs_optionisset(vfsp, HOPT_NOMAPLCASE, NULL)) 308 flags |= HSFSMNT_NOMAPLCASE; 309 if (vfs_optionisset(vfsp, HOPT_NOTRAILDOT, NULL)) 310 flags |= HSFSMNT_NOTRAILDOT; 311 if (vfs_optionisset(vfsp, HOPT_NRR, NULL)) 312 flags |= HSFSMNT_NORRIP; 313 if (vfs_optionisset(vfsp, HOPT_NOJOLIET, NULL)) 314 flags |= HSFSMNT_NOJOLIET; 315 if (vfs_optionisset(vfsp, HOPT_JOLIETLONG, NULL)) 316 flags |= HSFSMNT_JOLIETLONG; 317 if (vfs_optionisset(vfsp, HOPT_NOVERS2, NULL)) 318 flags |= HSFSMNT_NOVERS2; 319 320 error = pn_get(uap->dir, (uap->flags & MS_SYSSPACE) ? 321 UIO_SYSSPACE : UIO_USERSPACE, &dpn); 322 if (error) 323 return (error); 324 325 if ((error = hs_getmdev(vfsp, uap->spec, uap->flags, &dev, 326 &mode, cr)) != 0) { 327 pn_free(&dpn); 328 return (error); 329 } 330 331 /* 332 * If the device is a tape, return error 333 */ 334 if ((BDEVFLAG(dev) & D_TAPE) == D_TAPE) { 335 pn_free(&dpn); 336 return (ENOTBLK); 337 } 338 339 /* 340 * Mount the filesystem. 341 */ 342 error = hs_mountfs(vfsp, dev, dpn.pn_path, mode, flags, cr, 0); 343 pn_free(&dpn); 344 return (error); 345 } 346 347 /*ARGSUSED*/ 348 static int 349 hsfs_unmount( 350 struct vfs *vfsp, 351 int flag, 352 struct cred *cr) 353 { 354 struct hsfs **tspp; 355 struct hsfs *fsp; 356 357 if (secpolicy_fs_unmount(cr, vfsp) != 0) 358 return (EPERM); 359 360 /* 361 * forced unmount is not supported by this file system 362 * and thus, ENOTSUP is being returned. 363 */ 364 if (flag & MS_FORCE) 365 return (ENOTSUP); 366 367 fsp = VFS_TO_HSFS(vfsp); 368 369 if (fsp->hsfs_rootvp->v_count != 1) 370 return (EBUSY); 371 372 /* destroy all old pages and hsnodes for this vfs */ 373 if (hs_synchash(vfsp)) 374 return (EBUSY); 375 376 mutex_enter(&hs_mounttab_lock); 377 for (tspp = &hs_mounttab; *tspp != NULL; tspp = &(*tspp)->hsfs_next) { 378 if (*tspp == fsp) 379 break; 380 } 381 if (*tspp == NULL) { 382 mutex_exit(&hs_mounttab_lock); 383 panic("hsfs_unmount: vfs not mounted?"); 384 /*NOTREACHED*/ 385 } 386 387 *tspp = fsp->hsfs_next; 388 389 mutex_exit(&hs_mounttab_lock); 390 391 (void) VOP_CLOSE(fsp->hsfs_devvp, FREAD, 1, (offset_t)0, cr); 392 VN_RELE(fsp->hsfs_devvp); 393 /* free path table space */ 394 if (fsp->hsfs_ptbl != NULL) 395 kmem_free(fsp->hsfs_ptbl, 396 (size_t)fsp->hsfs_vol.ptbl_len); 397 /* free path table index table */ 398 if (fsp->hsfs_ptbl_idx != NULL) 399 kmem_free(fsp->hsfs_ptbl_idx, (size_t) 400 (fsp->hsfs_ptbl_idx_size * sizeof (struct ptable_idx))); 401 402 /* free "mounted on" pathame */ 403 if (fsp->hsfs_fsmnt != NULL) 404 kmem_free(fsp->hsfs_fsmnt, strlen(fsp->hsfs_fsmnt) + 1); 405 406 mutex_destroy(&fsp->hsfs_free_lock); 407 rw_destroy(&fsp->hsfs_hash_lock); 408 409 kmem_free(fsp, sizeof (*fsp)); 410 return (0); 411 } 412 413 /*ARGSUSED*/ 414 static int 415 hsfs_root(struct vfs *vfsp, struct vnode **vpp) 416 { 417 *vpp = (VFS_TO_HSFS(vfsp))->hsfs_rootvp; 418 VN_HOLD(*vpp); 419 return (0); 420 } 421 422 /*ARGSUSED*/ 423 static int 424 hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp) 425 { 426 struct hsfs *fsp; 427 dev32_t d32; 428 429 fsp = VFS_TO_HSFS(vfsp); 430 if (fsp->hsfs_magic != HSFS_MAGIC) 431 return (EINVAL); 432 bzero(sbp, sizeof (*sbp)); 433 sbp->f_bsize = vfsp->vfs_bsize; 434 sbp->f_frsize = sbp->f_bsize; /* no fragment, same as block size */ 435 sbp->f_blocks = (fsblkcnt64_t)fsp->hsfs_vol.vol_size; 436 437 sbp->f_bfree = (fsblkcnt64_t)0; 438 sbp->f_bavail = (fsblkcnt64_t)0; 439 sbp->f_files = (fsfilcnt64_t)-1; 440 sbp->f_ffree = (fsfilcnt64_t)0; 441 sbp->f_favail = (fsfilcnt64_t)0; 442 (void) cmpldev(&d32, vfsp->vfs_dev); 443 sbp->f_fsid = d32; 444 (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); 445 sbp->f_flag = vf_to_stf(vfsp->vfs_flag); 446 sbp->f_namemax = fsp->hsfs_namemax; 447 (void) strcpy(sbp->f_fstr, fsp->hsfs_vol.vol_id); 448 449 return (0); 450 } 451 452 /* 453 * Previously nodeid was declared as uint32_t. This has been changed 454 * to conform better with the ISO9660 standard. The standard states that 455 * a LBN can be a 32 bit number, as the MAKE_NODEID macro shifts this 456 * LBN 11 places left (LBN_TO_BYTE) and then shifts the result 5 right 457 * (divide by 32) we are left with the potential of an overflow if 458 * confined to a 32 bit value. 459 */ 460 461 static int 462 hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) 463 { 464 struct hsfid *fid; 465 struct hsfs *fsp; 466 ino64_t nodeid; 467 int error; 468 469 fsp = (struct hsfs *)VFS_TO_HSFS(vfsp); 470 fid = (struct hsfid *)fidp; 471 472 /* 473 * Look for vnode on hashlist. 474 * If found, it's now active and the refcnt was incremented. 475 */ 476 477 rw_enter(&fsp->hsfs_hash_lock, RW_READER); 478 479 nodeid = (ino64_t)MAKE_NODEID(fid->hf_dir_lbn, fid->hf_dir_off, vfsp); 480 481 if ((*vpp = hs_findhash(nodeid, vfsp)) == NULL) { 482 /* 483 * Not in cache, so we need to remake it. 484 * hs_remakenode() will read the directory entry 485 * and then check again to see if anyone else has 486 * put it in the cache. 487 */ 488 rw_exit(&fsp->hsfs_hash_lock); 489 error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, 490 vfsp, vpp); 491 return (error); 492 } 493 rw_exit(&fsp->hsfs_hash_lock); 494 return (0); 495 } 496 497 498 #define CHECKSUM_SIZE (64 * 1024) 499 500 /* 501 * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD 502 * We use the 'fsp' argument to determine the location of the root 503 * directory entry, and we start reading from there. 504 */ 505 static int 506 compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) 507 { 508 uint_t secno; 509 struct hs_volume *hsvp = &fsp->hsfs_vol; 510 struct buf *bp; 511 int error; 512 int fsid; 513 514 secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; 515 bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); 516 error = geterror(bp); 517 518 /* 519 * An error on read or a partial read means we asked 520 * for a nonexistant/corrupted piece of the device 521 * (including past-the-end of the media). Don't 522 * try to use the checksumming method then. 523 */ 524 if (!error && bp->b_bcount == CHECKSUM_SIZE) { 525 int *ibuf = (int *)bp->b_un.b_addr; 526 int i; 527 528 fsid = 0; 529 530 for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) 531 fsid ^= ibuf[ i ]; 532 } else { 533 /* 534 * Fallback - use creation date 535 */ 536 fsid = hsvp->cre_date.tv_sec; 537 } 538 539 brelse(bp); 540 541 return (fsid); 542 } 543 544 545 /*ARGSUSED*/ 546 static int 547 hs_mountfs( 548 struct vfs *vfsp, 549 dev_t dev, 550 char *path, 551 mode_t mode, 552 int mount_flags, 553 struct cred *cr, 554 int isroot) 555 { 556 struct vnode *devvp; 557 struct hsfs *tsp; 558 struct hsfs *fsp = NULL; 559 struct vattr vap; 560 struct hsnode *hp; 561 int error; 562 struct timeval tv; 563 int fsid; 564 int use_rrip; 565 int use_vers2; 566 int use_joliet; 567 int has_rrip = 0; 568 int has_vers2 = 0; 569 int has_joliet = 0; 570 int force_rrip_off; 571 int force_vers2_off; 572 int force_joliet_off; 573 size_t pathbufsz = strlen(path) + 1; 574 int redo_rootvp; 575 576 struct hs_volume *svp; /* Supplemental VD for ISO-9660:1999 */ 577 struct hs_volume *jvp; /* Joliet VD */ 578 579 /* 580 * The rules for which extension will be used are: 581 * 1. No specific mount options given: 582 * - use rrip if available 583 * - use ISO9660:1999 if available 584 * - use joliet if available. 585 * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: 586 * - use next "lower" extension 587 * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: 588 * - disable rrip support even if available 589 * - disable IOS9660:1999 support even if available 590 * 591 * We need to adjust these flags as we discover the extensions 592 * present. See below. These are just the starting values. 593 */ 594 use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; 595 use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; 596 use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; 597 598 /* 599 * Open the device 600 */ 601 devvp = makespecvp(dev, VBLK); 602 ASSERT(devvp != 0); 603 604 /* 605 * Open the target device (file) for read only. 606 */ 607 if (error = VOP_OPEN(&devvp, FREAD, cr)) { 608 VN_RELE(devvp); 609 return (error); 610 } 611 612 /* 613 * Refuse to go any further if this 614 * device is being used for swapping 615 */ 616 if (IS_SWAPVP(common_specvp(devvp))) { 617 error = EBUSY; 618 goto cleanup; 619 } 620 621 vap.va_mask = AT_SIZE; 622 if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr)) != 0) { 623 cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); 624 goto cleanup; 625 } 626 627 /* 628 * Make sure we have a nonzero size partition. 629 * The current version of the SD driver will *not* fail the open 630 * of such a partition so we have to check for it here. 631 */ 632 if (vap.va_size == 0) { 633 error = ENXIO; 634 goto cleanup; 635 } 636 637 /* 638 * Init a new hsfs structure. 639 */ 640 fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); 641 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); 642 jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); 643 644 /* hardwire perms, uid, gid */ 645 fsp->hsfs_vol.vol_uid = hsfs_default_uid; 646 fsp->hsfs_vol.vol_gid = hsfs_default_gid; 647 fsp->hsfs_vol.vol_prot = hsfs_default_mode; 648 svp->vol_uid = hsfs_default_uid; 649 svp->vol_gid = hsfs_default_gid; 650 svp->vol_prot = hsfs_default_mode; 651 jvp->vol_uid = hsfs_default_uid; 652 jvp->vol_gid = hsfs_default_gid; 653 jvp->vol_prot = hsfs_default_mode; 654 655 /* 656 * Look for a Standard File Structure Volume Descriptor, 657 * of which there must be at least one. 658 * If found, check for volume size consistency. 659 * 660 * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD 661 * If jvp->lbn_size is != 0, we did find a Joliet SVD. 662 */ 663 fsp->hsfs_namemax = ISO_FILE_NAMELEN; 664 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 665 error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); 666 if (error == EINVAL) /* no iso 9660 - try high sierra ... */ 667 error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); 668 669 if (error) 670 goto cleanup; 671 672 DTRACE_PROBE4(findvol, 673 struct hsfs *, fsp, 674 struct hs_volume *, &fsp->hsfs_vol, 675 struct hs_volume *, svp, 676 struct hs_volume *, jvp); 677 678 /* 679 * Generate a file system ID from the CD-ROM, 680 * and check it for uniqueness. 681 * 682 * What we are aiming for is some chance of integrity 683 * across disk change. That is, if a client has an fhandle, 684 * it will be valid as long as the same disk is mounted. 685 */ 686 fsid = compute_cdrom_id(fsp, devvp); 687 688 mutex_enter(&hs_mounttab_lock); 689 690 if (fsid == 0 || fsid == -1) { 691 uniqtime(&tv); 692 fsid = tv.tv_sec; 693 } else /* make sure that the fsid is unique */ 694 for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { 695 if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { 696 uniqtime(&tv); 697 fsid = tv.tv_sec; 698 break; 699 } 700 } 701 702 fsp->hsfs_next = hs_mounttab; 703 hs_mounttab = fsp; 704 705 fsp->hsfs_devvp = devvp; 706 fsp->hsfs_vfs = vfsp; 707 fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); 708 (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); 709 710 mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); 711 rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); 712 713 vfsp->vfs_data = (caddr_t)fsp; 714 vfsp->vfs_dev = dev; 715 vfsp->vfs_fstype = hsfsfstype; 716 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ 717 vfsp->vfs_fsid.val[0] = fsid; 718 vfsp->vfs_fsid.val[1] = hsfsfstype; 719 720 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 721 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 722 error = EINVAL; 723 goto cleanup; 724 } 725 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 726 727 /* 728 * Attempt to discover a RR extension. 729 */ 730 if (use_rrip) { 731 hp = VTOH(fsp->hsfs_rootvp); 732 hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); 733 } 734 735 has_rrip = IS_RRIP_IMPLEMENTED(fsp); 736 has_vers2 = (svp->lbn_size != 0); 737 has_joliet = (jvp->lbn_size != 0); 738 739 DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, 740 int, use_rrip, int, use_vers2, int, use_joliet); 741 742 DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, 743 int, has_rrip, int, has_vers2, int, has_joliet); 744 745 DTRACE_PROBE4(findvol, 746 struct hsfs *, fsp, 747 struct hs_volume *, &fsp->hsfs_vol, 748 struct hs_volume *, svp, 749 struct hs_volume *, jvp); 750 751 force_rrip_off = !use_rrip || 752 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || 753 (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); 754 755 force_vers2_off = !use_vers2 || 756 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); 757 758 force_joliet_off = !use_joliet; 759 760 DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, 761 int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); 762 763 /* 764 * At the moment, we have references of all three possible 765 * extensions (RR, ISO9660:1999/v2 and Joliet) if present. 766 * 767 * The "active" volume descriptor is RRIP (or ISO9660:1988). 768 * We now switch to the user-requested one. 769 */ 770 redo_rootvp = 0; 771 772 if (force_rrip_off || !has_rrip) { 773 if (has_vers2 && !force_vers2_off) { 774 VN_RELE(fsp->hsfs_rootvp); 775 bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 776 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; 777 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 778 redo_rootvp = 1; 779 has_joliet = 0; 780 } else if (has_joliet && !force_joliet_off) { 781 VN_RELE(fsp->hsfs_rootvp); 782 bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 783 fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; 784 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 785 redo_rootvp = 1; 786 has_vers2 = 0; 787 } 788 } 789 790 if (redo_rootvp) { 791 /* 792 * Make sure not to use Rock Ridge. 793 */ 794 UNSET_IMPL_BIT(fsp, RRIP_BIT); 795 UNSET_SUSP_BIT(fsp); 796 has_rrip = 0; 797 798 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 799 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 800 error = EINVAL; 801 goto cleanup; 802 } 803 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 804 } 805 if (IS_RRIP_IMPLEMENTED(fsp)) { 806 has_vers2 = 0; 807 has_joliet = 0; 808 } 809 if (force_vers2_off) 810 has_vers2 = 0; 811 if (force_joliet_off) 812 has_joliet = 0; 813 DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, 814 int, has_rrip, int, has_vers2, int, has_joliet); 815 816 /* 817 * mark root node as VROOT 818 */ 819 fsp->hsfs_rootvp->v_flag |= VROOT; 820 821 /* Here we take care of some special case stuff for mountroot */ 822 if (isroot) { 823 fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; 824 rootvp = fsp->hsfs_rootvp; 825 } 826 827 if (IS_RRIP_IMPLEMENTED(fsp)) { 828 /* 829 * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 830 */ 831 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 832 833 fsp->hsfs_namemax = RRIP_FILE_NAMELEN; 834 fsp->hsfs_namelen = RRIP_FILE_NAMELEN; 835 836 ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); 837 vfs_clearmntopt(vfsp, HOPT_VERS2); 838 vfs_clearmntopt(vfsp, HOPT_JOLIET); 839 840 } else switch (fsp->hsfs_vol_type) { 841 842 case HS_VOL_TYPE_HS: 843 case HS_VOL_TYPE_ISO: 844 default: 845 /* 846 * if iso v1, don't allow trailing spaces in iso file names 847 */ 848 mount_flags |= HSFSMNT_NOTRAILSPACE; 849 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 850 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 851 vfs_clearmntopt(vfsp, HOPT_RR); 852 vfs_clearmntopt(vfsp, HOPT_VERS2); 853 vfs_clearmntopt(vfsp, HOPT_JOLIET); 854 break; 855 856 case HS_VOL_TYPE_ISO_V2: 857 /* 858 * if iso v2, don't copy NOTRAILDOT to hsfs_flags 859 */ 860 mount_flags &= ~HSFSMNT_NOTRAILDOT; 861 mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; 862 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 863 fsp->hsfs_namelen = ISO_NAMELEN_V2; 864 vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); 865 vfs_clearmntopt(vfsp, HOPT_RR); 866 vfs_clearmntopt(vfsp, HOPT_JOLIET); 867 break; 868 869 case HS_VOL_TYPE_JOLIET: 870 /* 871 * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 872 */ 873 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 874 mount_flags |= HSFSMNT_NOMAPLCASE; 875 if (mount_flags & HSFSMNT_JOLIETLONG) 876 fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ 877 else 878 fsp->hsfs_namemax = MAXNAMELEN-1; 879 fsp->hsfs_namelen = JOLIET_NAMELEN*2; 880 vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); 881 vfs_clearmntopt(vfsp, HOPT_RR); 882 vfs_clearmntopt(vfsp, HOPT_VERS2); 883 break; 884 } 885 886 fsp->hsfs_flags = mount_flags; 887 888 DTRACE_PROBE1(mount__done, struct hsfs *, fsp); 889 890 /* 891 * set the magic word 892 */ 893 fsp->hsfs_magic = HSFS_MAGIC; 894 mutex_exit(&hs_mounttab_lock); 895 896 return (0); 897 898 cleanup: 899 (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr); 900 VN_RELE(devvp); 901 if (fsp) 902 kmem_free(fsp, sizeof (*fsp)); 903 if (svp) 904 kmem_free(svp, sizeof (*svp)); 905 if (jvp) 906 kmem_free(jvp, sizeof (*jvp)); 907 return (error); 908 } 909 910 /* 911 * Get the rootvp associated with fsp->hsfs_vol 912 */ 913 static int 914 hs_getrootvp( 915 struct vfs *vfsp, 916 struct hsfs *fsp, 917 size_t pathsize) 918 { 919 struct hsnode *hp; 920 921 ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); 922 923 /* 924 * If the root directory does not appear to be 925 * valid, use what it points to as "." instead. 926 * Some Defense Mapping Agency disks are non-conformant 927 * in this way. 928 */ 929 if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { 930 hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); 931 if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, 932 (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { 933 hs_mounttab = hs_mounttab->hsfs_next; 934 mutex_destroy(&fsp->hsfs_free_lock); 935 rw_destroy(&fsp->hsfs_hash_lock); 936 kmem_free(fsp->hsfs_fsmnt, pathsize); 937 mutex_exit(&hs_mounttab_lock); 938 return (0); 939 } 940 } else { 941 fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, 942 fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); 943 } 944 945 /* XXX - ignore the path table for now */ 946 fsp->hsfs_ptbl = NULL; 947 hp = VTOH(fsp->hsfs_rootvp); 948 hp->hs_ptbl_idx = NULL; 949 950 return (1); 951 } 952 953 /* 954 * hs_findhsvol() 955 * 956 * Locate the Standard File Structure Volume Descriptor and 957 * parse it into an hs_volume structure. 958 * 959 * XXX - May someday want to look for Coded Character Set FSVD, too. 960 */ 961 static int 962 hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) 963 { 964 struct buf *secbp; 965 int i; 966 uchar_t *volp; 967 int error; 968 uint_t secno; 969 970 secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); 971 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 972 error = geterror(secbp); 973 974 if (error != 0) { 975 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); 976 brelse(secbp); 977 return (error); 978 } 979 980 volp = (uchar_t *)secbp->b_un.b_addr; 981 982 while (HSV_DESC_TYPE(volp) != VD_EOV) { 983 for (i = 0; i < HSV_ID_STRLEN; i++) 984 if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) 985 goto cantfind; 986 if (HSV_STD_VER(volp) != HSV_ID_VER) 987 goto cantfind; 988 switch (HSV_DESC_TYPE(volp)) { 989 case VD_SFS: 990 /* Standard File Structure */ 991 fsp->hsfs_vol_type = HS_VOL_TYPE_HS; 992 error = hs_parsehsvol(fsp, volp, hvp); 993 brelse(secbp); 994 return (error); 995 996 case VD_CCFS: 997 /* Coded Character File Structure */ 998 case VD_BOOT: 999 case VD_UNSPEC: 1000 case VD_EOV: 1001 break; 1002 } 1003 brelse(secbp); 1004 ++secno; 1005 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1006 1007 error = geterror(secbp); 1008 1009 if (error != 0) { 1010 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", 1011 error); 1012 brelse(secbp); 1013 return (error); 1014 } 1015 1016 volp = (uchar_t *)secbp->b_un.b_addr; 1017 } 1018 cantfind: 1019 brelse(secbp); 1020 return (EINVAL); 1021 } 1022 1023 /* 1024 * hs_parsehsvol 1025 * 1026 * Parse the Standard File Structure Volume Descriptor into 1027 * an hs_volume structure. We can't just bcopy it into the 1028 * structure because of byte-ordering problems. 1029 * 1030 */ 1031 static int 1032 hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1033 { 1034 hvp->vol_size = HSV_VOL_SIZE(volp); 1035 hvp->lbn_size = HSV_BLK_SIZE(volp); 1036 if (hvp->lbn_size == 0) { 1037 cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " 1038 "SFSVD is zero"); 1039 return (EINVAL); 1040 } 1041 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1042 hvp->lbn_secshift = ffs((long)howmany(HS_SECTOR_SIZE, 1043 (int)hvp->lbn_size)) - 1; 1044 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1045 hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); 1046 hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); 1047 hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); 1048 hvp->ptbl_len = HSV_PTBL_SIZE(volp); 1049 hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); 1050 hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); 1051 #if defined(_LITTLE_ENDIAN) 1052 hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); 1053 #else 1054 hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); 1055 #endif 1056 hs_copylabel(hvp, HSV_VOL_ID(volp), 0); 1057 1058 /* 1059 * Make sure that lbn_size is a power of two and otherwise valid. 1060 */ 1061 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1062 cmn_err(CE_NOTE, 1063 "hsfs: %d-byte logical block size not supported", 1064 hvp->lbn_size); 1065 return (EINVAL); 1066 } 1067 return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, 1068 (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); 1069 } 1070 1071 /* 1072 * hs_findisovol() 1073 * 1074 * Locate the Primary Volume Descriptor 1075 * parse it into an hs_volume structure. 1076 * 1077 * XXX - Partition not yet done 1078 * 1079 * Except for fsp->hsfs_vol_type, no fsp member may be modified. 1080 * fsp->hsfs_vol is modified indirectly via the *hvp argument. 1081 */ 1082 static int 1083 hs_findisovol(struct hsfs *fsp, struct vnode *vp, 1084 struct hs_volume *hvp, 1085 struct hs_volume *svp, 1086 struct hs_volume *jvp) 1087 { 1088 struct buf *secbp; 1089 int i; 1090 uchar_t *volp; 1091 int error; 1092 uint_t secno; 1093 int foundpvd = 0; 1094 int foundsvd = 0; 1095 int foundjvd = 0; 1096 1097 secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); 1098 secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); 1099 error = geterror(secbp); 1100 1101 if (error != 0) { 1102 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); 1103 brelse(secbp); 1104 return (error); 1105 } 1106 1107 volp = (uchar_t *)secbp->b_un.b_addr; 1108 1109 while ((enum iso_voldesc_type) ISO_DESC_TYPE(volp) != ISO_VD_EOV) { 1110 for (i = 0; i < ISO_ID_STRLEN; i++) 1111 if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) 1112 goto cantfind; 1113 switch (ISO_DESC_TYPE(volp)) { 1114 case ISO_VD_PVD: 1115 /* Standard File Structure */ 1116 if (ISO_STD_VER(volp) != ISO_ID_VER) 1117 goto cantfind; 1118 if (foundpvd != 1) { 1119 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1120 if (error = hs_parseisovol(fsp, volp, hvp)) { 1121 brelse(secbp); 1122 return (error); 1123 } 1124 foundpvd = 1; 1125 } 1126 break; 1127 case ISO_VD_SVD: 1128 /* Supplementary Volume Descriptor */ 1129 if (ISO_STD_VER(volp) == ISO_ID_VER2 && 1130 foundsvd != 1) { 1131 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1132 if (error = hs_parseisovol(fsp, volp, svp)) { 1133 brelse(secbp); 1134 return (error); 1135 } 1136 foundsvd = 1; 1137 } 1138 if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { 1139 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1140 if (error = hs_parseisovol(fsp, volp, jvp)) { 1141 brelse(secbp); 1142 return (error); 1143 } 1144 foundjvd = 1; 1145 } 1146 break; 1147 case ISO_VD_BOOT: 1148 break; 1149 case ISO_VD_VPD: 1150 /* currently cannot handle partition */ 1151 break; 1152 case VD_EOV: 1153 break; 1154 } 1155 brelse(secbp); 1156 ++secno; 1157 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1158 error = geterror(secbp); 1159 1160 if (error != 0) { 1161 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1162 error); 1163 brelse(secbp); 1164 return (error); 1165 } 1166 1167 volp = (uchar_t *)secbp->b_un.b_addr; 1168 } 1169 if (foundpvd) { 1170 brelse(secbp); 1171 return (0); 1172 } 1173 cantfind: 1174 brelse(secbp); 1175 return (EINVAL); 1176 } 1177 1178 /* 1179 * Return 0 if no Joliet is found 1180 * else return Joliet Level 1..3 1181 */ 1182 static int 1183 hs_joliet_level(uchar_t *volp) 1184 { 1185 if (ISO_std_ver(volp)[0] == ISO_ID_VER && 1186 ISO_svd_esc(volp)[0] == '%' && 1187 ISO_svd_esc(volp)[1] == '/') { 1188 1189 switch (ISO_svd_esc(volp)[2]) { 1190 1191 case '@': 1192 return (1); 1193 case 'C': 1194 return (2); 1195 case 'E': 1196 return (3); 1197 } 1198 } 1199 return (0); 1200 } 1201 1202 /* 1203 * hs_parseisovol 1204 * 1205 * Parse the Primary Volume Descriptor into an hs_volume structure. 1206 * 1207 */ 1208 static int 1209 hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1210 { 1211 hvp->vol_size = ISO_VOL_SIZE(volp); 1212 hvp->lbn_size = ISO_BLK_SIZE(volp); 1213 if (hvp->lbn_size == 0) { 1214 cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " 1215 "PVD is zero"); 1216 return (EINVAL); 1217 } 1218 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1219 hvp->lbn_secshift = ffs((long)howmany(ISO_SECTOR_SIZE, 1220 (int)hvp->lbn_size)) - 1; 1221 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1222 hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); 1223 hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); 1224 hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); 1225 hvp->ptbl_len = ISO_PTBL_SIZE(volp); 1226 hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); 1227 hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); 1228 #if defined(_LITTLE_ENDIAN) 1229 hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); 1230 #else 1231 hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); 1232 #endif 1233 hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); 1234 1235 /* 1236 * Make sure that lbn_size is a power of two and otherwise valid. 1237 */ 1238 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1239 cmn_err(CE_NOTE, 1240 "hsfs: %d-byte logical block size not supported", 1241 hvp->lbn_size); 1242 return (EINVAL); 1243 } 1244 return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, 1245 (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); 1246 } 1247 1248 /* 1249 * Common code for mount and umount. 1250 * Check that the user's argument is a reasonable 1251 * thing on which to mount, and return the device number if so. 1252 */ 1253 static int 1254 hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, 1255 cred_t *cr) 1256 { 1257 int error; 1258 struct vnode *vp; 1259 struct vattr vap; 1260 dev_t dev; 1261 1262 /* 1263 * Get the device to be mounted 1264 */ 1265 error = lookupname(fspec, (flags & MS_SYSSPACE) ? 1266 UIO_SYSSPACE : UIO_USERSPACE, FOLLOW, NULLVPP, &vp); 1267 if (error) { 1268 if (error == ENOENT) { 1269 return (ENODEV); /* needs translation */ 1270 } 1271 return (error); 1272 } 1273 if (vp->v_type != VBLK) { 1274 VN_RELE(vp); 1275 return (ENOTBLK); 1276 } 1277 /* 1278 * Can we read from the device? 1279 */ 1280 if ((error = VOP_ACCESS(vp, VREAD, 0, cr)) != 0 || 1281 (error = secpolicy_spec_open(cr, vp, FREAD)) != 0) { 1282 VN_RELE(vp); 1283 return (error); 1284 } 1285 1286 vap.va_mask = AT_MODE; /* get protection mode */ 1287 (void) VOP_GETATTR(vp, &vap, 0, CRED()); 1288 *mode = vap.va_mode; 1289 1290 dev = *pdev = vp->v_rdev; 1291 VN_RELE(vp); 1292 1293 /* 1294 * Ensure that this device isn't already mounted, 1295 * unless this is a REMOUNT request or we are told to suppress 1296 * mount checks. 1297 */ 1298 if ((flags & MS_NOCHECK) == 0) { 1299 if (vfs_devmounting(dev, vfsp)) 1300 return (EBUSY); 1301 if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) 1302 return (EBUSY); 1303 } 1304 1305 if (getmajor(*pdev) >= devcnt) 1306 return (ENXIO); 1307 return (0); 1308 } 1309 1310 static void 1311 hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) 1312 { 1313 char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ 1314 1315 if (isjoliet) { 1316 /* 1317 * hs_joliet_cp() will output 16..48 bytes. 1318 * We need to clear 'lbuf' to avoid junk chars past byte 15. 1319 */ 1320 bzero(lbuf, sizeof (lbuf)); 1321 (void) hs_joliet_cp((char *)label, lbuf, 32); 1322 label = (unsigned char *)lbuf; 1323 } 1324 /* cdrom volid is at most 32 bytes */ 1325 bcopy(label, hvp->vol_id, 32); 1326 hvp->vol_id[31] = NULL; 1327 } 1328 1329 /* 1330 * Mount root file system. 1331 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to 1332 * remount the root file system, and ROOT_UNMOUNT if called to 1333 * unmount the root (e.g., as part of a system shutdown). 1334 * 1335 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP 1336 * operation, goes along with auto-configuration. A mechanism should be 1337 * provided by which machine-INdependent code in the kernel can say "get me the 1338 * right root file system" and "get me the right initial swap area", and have 1339 * that done in what may well be a machine-dependent fashion. 1340 * Unfortunately, it is also file-system-type dependent (NFS gets it via 1341 * bootparams calls, UFS gets it from various and sundry machine-dependent 1342 * mechanisms, as SPECFS does for swap). 1343 */ 1344 static int 1345 hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) 1346 { 1347 int error; 1348 struct hsfs *fsp; 1349 struct hs_volume *fvolp; 1350 static int hsfsrootdone = 0; 1351 dev_t rootdev; 1352 mode_t mode = 0; 1353 1354 if (why == ROOT_INIT) { 1355 if (hsfsrootdone++) 1356 return (EBUSY); 1357 rootdev = getrootdev(); 1358 if (rootdev == (dev_t)NODEV) 1359 return (ENODEV); 1360 vfsp->vfs_dev = rootdev; 1361 vfsp->vfs_flag |= VFS_RDONLY; 1362 } else if (why == ROOT_REMOUNT) { 1363 cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); 1364 return (0); 1365 } else if (why == ROOT_UNMOUNT) { 1366 return (0); 1367 } 1368 error = vfs_lock(vfsp); 1369 if (error) { 1370 cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); 1371 return (error); 1372 } 1373 1374 error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); 1375 /* 1376 * XXX - assumes root device is not indirect, because we don't set 1377 * rootvp. Is rootvp used for anything? If so, make another arg 1378 * to mountfs. 1379 */ 1380 if (error) { 1381 vfs_unlock(vfsp); 1382 if (rootvp) { 1383 VN_RELE(rootvp); 1384 rootvp = (struct vnode *)0; 1385 } 1386 return (error); 1387 } 1388 if (why == ROOT_INIT) 1389 vfs_add((struct vnode *)0, vfsp, 1390 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1391 vfs_unlock(vfsp); 1392 fsp = VFS_TO_HSFS(vfsp); 1393 fvolp = &fsp->hsfs_vol; 1394 #ifdef HSFS_CLKSET 1395 if (fvolp->cre_date.tv_sec == 0) { 1396 cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); 1397 if (fvolp->mod_date.tv_sec == 0) { 1398 cmn_err(CE_NOTE, "hsfs_mountroot: mod_date.tv_sec == 0"); 1399 cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); 1400 clkset(-1L); 1401 } else 1402 clkset(fvolp->mod_date.tv_sec); 1403 } else 1404 clkset(fvolp->mod_date.tv_sec); 1405 #else /* HSFS_CLKSET */ 1406 clkset(-1L); 1407 #endif /* HSFS_CLKSET */ 1408 return (0); 1409 } 1410 1411 /* 1412 * hs_findvoldesc() 1413 * 1414 * Return the sector where the volume descriptor lives. This is 1415 * a fixed value for "normal" cd-rom's, but can change for 1416 * multisession cd's. 1417 * 1418 * desc_sec is the same for high-sierra and iso 9660 formats, why 1419 * there are two differnt #defines used in the code for this is 1420 * beyond me. These are standards, cast in concrete, right? 1421 * To be general, however, this function supports passing in different 1422 * values. 1423 */ 1424 static int 1425 hs_findvoldesc(dev_t rdev, int desc_sec) 1426 { 1427 int secno; 1428 int error; 1429 int rval; /* ignored */ 1430 1431 #ifdef CDROMREADOFFSET 1432 /* 1433 * Issue the Read Offset ioctl directly to the 1434 * device. Ignore any errors and set starting 1435 * secno to the default, otherwise add the 1436 * VOLDESC sector number to the offset. 1437 */ 1438 error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, 1439 FNATIVE|FKIOCTL|FREAD, CRED(), &rval); 1440 if (error) { 1441 secno = desc_sec; 1442 } else { 1443 secno += desc_sec; 1444 } 1445 #else 1446 secno = desc_sec; 1447 #endif 1448 1449 return (secno); 1450 } 1451