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 (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011 Bayard G. Bell. All rights reserved. 24 */ 25 26 /* 27 * VFS operations for High Sierra filesystem 28 */ 29 30 #include <sys/types.h> 31 #include <sys/isa_defs.h> 32 #include <sys/t_lock.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/sysmacros.h> 36 #include <sys/kmem.h> 37 #include <sys/signal.h> 38 #include <sys/user.h> 39 #include <sys/proc.h> 40 #include <sys/disp.h> 41 #include <sys/buf.h> 42 #include <sys/pathname.h> 43 #include <sys/vfs.h> 44 #include <sys/vfs_opreg.h> 45 #include <sys/vnode.h> 46 #include <sys/file.h> 47 #include <sys/uio.h> 48 #include <sys/conf.h> 49 #include <sys/policy.h> 50 51 #include <vm/page.h> 52 53 #include <sys/fs/snode.h> 54 #include <sys/fs/hsfs_spec.h> 55 #include <sys/fs/hsfs_isospec.h> 56 #include <sys/fs/hsfs_node.h> 57 #include <sys/fs/hsfs_impl.h> 58 #include <sys/fs/hsfs_susp.h> 59 #include <sys/fs/hsfs_rrip.h> 60 61 #include <sys/statvfs.h> 62 #include <sys/mount.h> 63 #include <sys/mntent.h> 64 #include <sys/swap.h> 65 #include <sys/errno.h> 66 #include <sys/debug.h> 67 #include "fs/fs_subr.h" 68 #include <sys/cmn_err.h> 69 #include <sys/bootconf.h> 70 71 #include <sys/sdt.h> 72 73 /* 74 * These are needed for the CDROMREADOFFSET Code 75 */ 76 #include <sys/cdio.h> 77 #include <sys/sunddi.h> 78 79 #define HSFS_CLKSET 80 81 #include <sys/modctl.h> 82 83 /* 84 * Options for mount. 85 */ 86 #define HOPT_GLOBAL MNTOPT_GLOBAL 87 #define HOPT_NOGLOBAL MNTOPT_NOGLOBAL 88 #define HOPT_MAPLCASE "maplcase" 89 #define HOPT_NOMAPLCASE "nomaplcase" 90 #define HOPT_NOTRAILDOT "notraildot" 91 #define HOPT_TRAILDOT "traildot" 92 #define HOPT_NRR "nrr" 93 #define HOPT_RR "rr" 94 #define HOPT_JOLIET "joliet" 95 #define HOPT_NOJOLIET "nojoliet" 96 #define HOPT_JOLIETLONG "jolietlong" 97 #define HOPT_VERS2 "vers2" 98 #define HOPT_NOVERS2 "novers2" 99 #define HOPT_RO MNTOPT_RO 100 101 static char *global_cancel[] = { HOPT_NOGLOBAL, NULL }; 102 static char *noglobal_cancel[] = { HOPT_GLOBAL, NULL }; 103 static char *mapl_cancel[] = { HOPT_NOMAPLCASE, NULL }; 104 static char *nomapl_cancel[] = { HOPT_MAPLCASE, NULL }; 105 static char *ro_cancel[] = { MNTOPT_RW, NULL }; 106 static char *rr_cancel[] = { HOPT_NRR, NULL }; 107 static char *nrr_cancel[] = { HOPT_RR, NULL }; 108 static char *joliet_cancel[] = { HOPT_NOJOLIET, NULL }; 109 static char *nojoliet_cancel[] = { HOPT_JOLIET, NULL }; 110 static char *vers2_cancel[] = { HOPT_NOVERS2, NULL }; 111 static char *novers2_cancel[] = { HOPT_VERS2, NULL }; 112 static char *trail_cancel[] = { HOPT_NOTRAILDOT, NULL }; 113 static char *notrail_cancel[] = { HOPT_TRAILDOT, NULL }; 114 115 static mntopt_t hsfs_options[] = { 116 { HOPT_GLOBAL, global_cancel, NULL, 0, NULL }, 117 { HOPT_NOGLOBAL, noglobal_cancel, NULL, MO_DEFAULT, NULL }, 118 { HOPT_MAPLCASE, mapl_cancel, NULL, MO_DEFAULT, NULL }, 119 { HOPT_NOMAPLCASE, nomapl_cancel, NULL, 0, NULL }, 120 { HOPT_RO, ro_cancel, NULL, MO_DEFAULT, NULL }, 121 { HOPT_RR, rr_cancel, NULL, MO_DEFAULT, NULL }, 122 { HOPT_NRR, nrr_cancel, NULL, 0, NULL }, 123 { HOPT_JOLIET, joliet_cancel, NULL, 0, NULL }, 124 { HOPT_NOJOLIET, nojoliet_cancel, NULL, 0, NULL }, 125 { HOPT_JOLIETLONG, NULL, NULL, 0, NULL }, 126 { HOPT_VERS2, vers2_cancel, NULL, 0, NULL }, 127 { HOPT_NOVERS2, novers2_cancel, NULL, 0, NULL }, 128 { HOPT_TRAILDOT, trail_cancel, NULL, MO_DEFAULT, NULL }, 129 { HOPT_NOTRAILDOT, notrail_cancel, NULL, 0, NULL }, 130 { "sector", NULL, "0", MO_HASVALUE, NULL}, 131 }; 132 133 static mntopts_t hsfs_proto_opttbl = { 134 sizeof (hsfs_options) / sizeof (mntopt_t), 135 hsfs_options 136 }; 137 138 /* 139 * Indicates whether to enable the I/O scheduling and readahead logic 140 * 1 - Enable, 0 - Do not Enable. 141 * Debugging purposes. 142 */ 143 int do_schedio = 1; 144 static int hsfsfstype; 145 static int hsfsinit(int, char *); 146 147 static vfsdef_t vfw = { 148 VFSDEF_VERSION, 149 "hsfs", 150 hsfsinit, 151 /* We don't suppport remounting */ 152 VSW_HASPROTO|VSW_STATS|VSW_CANLOFI|VSW_ZMOUNT, 153 &hsfs_proto_opttbl 154 }; 155 156 static struct modlfs modlfs = { 157 &mod_fsops, "filesystem for HSFS", &vfw 158 }; 159 160 static struct modlinkage modlinkage = { 161 MODREV_1, (void *)&modlfs, NULL 162 }; 163 164 extern void hsched_init_caches(void); 165 extern void hsched_fini_caches(void); 166 167 168 int 169 _init(void) 170 { 171 return (mod_install(&modlinkage)); 172 } 173 174 int 175 _fini(void) 176 { 177 int error; 178 179 error = mod_remove(&modlinkage); 180 181 DTRACE_PROBE1(mod_remove, int, error); 182 183 if (error) 184 return (error); 185 186 mutex_destroy(&hs_mounttab_lock); 187 188 /* 189 * Tear down the operations vectors 190 */ 191 (void) vfs_freevfsops_by_type(hsfsfstype); 192 vn_freevnodeops(hsfs_vnodeops); 193 194 hs_fini_hsnode_cache(); 195 hsched_fini_caches(); 196 return (0); 197 } 198 199 int 200 _info(struct modinfo *modinfop) 201 { 202 return (mod_info(&modlinkage, modinfop)); 203 } 204 205 #define BDEVFLAG(dev) ((devopsp[getmajor(dev)])->devo_cb_ops->cb_flag) 206 207 kmutex_t hs_mounttab_lock; 208 struct hsfs *hs_mounttab = NULL; 209 210 /* default mode, uid, gid */ 211 mode_t hsfs_default_mode = 0555; 212 uid_t hsfs_default_uid = 0; 213 gid_t hsfs_default_gid = 3; 214 215 extern void hsched_init(struct hsfs *fsp, int fsid, 216 struct modlinkage *modlinkage); 217 extern void hsched_fini(struct hsfs_queue *hqueue); 218 extern void hsfs_init_kstats(struct hsfs *fsp, int fsid); 219 extern void hsfs_fini_kstats(struct hsfs *fsp); 220 221 static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 222 struct mounta *uap, struct cred *cr); 223 static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); 224 static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); 225 static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); 226 static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); 227 static int hsfs_mountroot(struct vfs *, enum whymountroot); 228 229 static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, 230 mode_t mode, int flags, struct cred *cr, int isroot); 231 static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); 232 static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, 233 struct hs_volume *hvp); 234 static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, 235 struct hs_volume *hvp); 236 static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, 237 struct hs_volume *hvp, 238 struct hs_volume *svp, 239 struct hs_volume *jvp); 240 static int hs_joliet_level(uchar_t *volp); 241 static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, 242 struct hs_volume *hvp); 243 static void hs_copylabel(struct hs_volume *, unsigned char *, int); 244 static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, 245 mode_t *mode, cred_t *cr); 246 static int hs_findvoldesc(dev_t rdev, int desc_sec); 247 248 static int 249 hsfsinit(int fstype, char *name) 250 { 251 static const fs_operation_def_t hsfs_vfsops_template[] = { 252 VFSNAME_MOUNT, { .vfs_mount = hsfs_mount }, 253 VFSNAME_UNMOUNT, { .vfs_unmount = hsfs_unmount }, 254 VFSNAME_ROOT, { .vfs_root = hsfs_root }, 255 VFSNAME_STATVFS, { .vfs_statvfs = hsfs_statvfs }, 256 VFSNAME_VGET, { .vfs_vget = hsfs_vget }, 257 VFSNAME_MOUNTROOT, { .vfs_mountroot = hsfs_mountroot }, 258 NULL, NULL 259 }; 260 int error; 261 262 error = vfs_setfsops(fstype, hsfs_vfsops_template, NULL); 263 if (error != 0) { 264 cmn_err(CE_WARN, "hsfsinit: bad vfs ops template"); 265 return (error); 266 } 267 268 error = vn_make_ops(name, hsfs_vnodeops_template, &hsfs_vnodeops); 269 if (error != 0) { 270 (void) vfs_freevfsops_by_type(fstype); 271 cmn_err(CE_WARN, "hsfsinit: bad vnode ops template"); 272 return (error); 273 } 274 275 hsfsfstype = fstype; 276 mutex_init(&hs_mounttab_lock, NULL, MUTEX_DEFAULT, NULL); 277 hs_init_hsnode_cache(); 278 hsched_init_caches(); 279 return (0); 280 } 281 282 /*ARGSUSED*/ 283 static int 284 hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 285 struct mounta *uap, struct cred *cr) 286 { 287 int vnode_busy; 288 dev_t dev; 289 struct pathname dpn; 290 int error; 291 mode_t mode; 292 int flags; /* this will hold the mount specific data */ 293 294 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) 295 return (error); 296 297 if (mvp->v_type != VDIR) 298 return (ENOTDIR); 299 300 /* mount option must be read only, else mount will be rejected */ 301 if (!(uap->flags & MS_RDONLY)) 302 return (EROFS); 303 304 /* 305 * We already told the framework that we don't support remounting. 306 */ 307 ASSERT(!(uap->flags & MS_REMOUNT)); 308 309 mutex_enter(&mvp->v_lock); 310 vnode_busy = (mvp->v_count != 1) || (mvp->v_flag & VROOT); 311 mutex_exit(&mvp->v_lock); 312 313 if ((uap->flags & MS_OVERLAY) == 0 && vnode_busy) { 314 return (EBUSY); 315 } 316 317 /* 318 * Check for the options that actually affect things 319 * at our level. 320 */ 321 flags = 0; 322 if (vfs_optionisset(vfsp, HOPT_NOMAPLCASE, NULL)) 323 flags |= HSFSMNT_NOMAPLCASE; 324 if (vfs_optionisset(vfsp, HOPT_NOTRAILDOT, NULL)) 325 flags |= HSFSMNT_NOTRAILDOT; 326 if (vfs_optionisset(vfsp, HOPT_NRR, NULL)) 327 flags |= HSFSMNT_NORRIP; 328 if (vfs_optionisset(vfsp, HOPT_NOJOLIET, NULL)) 329 flags |= HSFSMNT_NOJOLIET; 330 if (vfs_optionisset(vfsp, HOPT_JOLIETLONG, NULL)) 331 flags |= HSFSMNT_JOLIETLONG; 332 if (vfs_optionisset(vfsp, HOPT_NOVERS2, NULL)) 333 flags |= HSFSMNT_NOVERS2; 334 335 error = pn_get(uap->dir, (uap->flags & MS_SYSSPACE) ? 336 UIO_SYSSPACE : UIO_USERSPACE, &dpn); 337 if (error) 338 return (error); 339 340 error = hs_getmdev(vfsp, uap->spec, uap->flags, &dev, &mode, cr); 341 if (error != 0) { 342 pn_free(&dpn); 343 return (error); 344 } 345 346 /* 347 * If the device is a tape, return error 348 */ 349 if ((BDEVFLAG(dev) & D_TAPE) == D_TAPE) { 350 pn_free(&dpn); 351 return (ENOTBLK); 352 } 353 354 /* 355 * Mount the filesystem. 356 */ 357 error = hs_mountfs(vfsp, dev, dpn.pn_path, mode, flags, cr, 0); 358 pn_free(&dpn); 359 return (error); 360 } 361 362 /*ARGSUSED*/ 363 static int 364 hsfs_unmount( 365 struct vfs *vfsp, 366 int flag, 367 struct cred *cr) 368 { 369 struct hsfs **tspp; 370 struct hsfs *fsp; 371 372 if (secpolicy_fs_unmount(cr, vfsp) != 0) 373 return (EPERM); 374 375 /* 376 * forced unmount is not supported by this file system 377 * and thus, ENOTSUP is being returned. 378 */ 379 if (flag & MS_FORCE) 380 return (ENOTSUP); 381 382 fsp = VFS_TO_HSFS(vfsp); 383 384 if (fsp->hsfs_rootvp->v_count != 1) 385 return (EBUSY); 386 387 /* destroy all old pages and hsnodes for this vfs */ 388 if (hs_synchash(vfsp)) 389 return (EBUSY); 390 391 mutex_enter(&hs_mounttab_lock); 392 for (tspp = &hs_mounttab; *tspp != NULL; tspp = &(*tspp)->hsfs_next) { 393 if (*tspp == fsp) 394 break; 395 } 396 if (*tspp == NULL) { 397 mutex_exit(&hs_mounttab_lock); 398 panic("hsfs_unmount: vfs not mounted?"); 399 /*NOTREACHED*/ 400 } 401 402 *tspp = fsp->hsfs_next; 403 404 mutex_exit(&hs_mounttab_lock); 405 406 hsfs_fini_kstats(fsp); 407 (void) VOP_CLOSE(fsp->hsfs_devvp, FREAD, 1, (offset_t)0, cr, NULL); 408 VN_RELE(fsp->hsfs_devvp); 409 /* free path table space */ 410 if (fsp->hsfs_ptbl != NULL) 411 kmem_free(fsp->hsfs_ptbl, (size_t)fsp->hsfs_vol.ptbl_len); 412 /* free path table index table */ 413 if (fsp->hsfs_ptbl_idx != NULL) 414 kmem_free(fsp->hsfs_ptbl_idx, (size_t) 415 (fsp->hsfs_ptbl_idx_size * sizeof (struct ptable_idx))); 416 417 /* free "mounted on" pathame */ 418 if (fsp->hsfs_fsmnt != NULL) 419 kmem_free(fsp->hsfs_fsmnt, strlen(fsp->hsfs_fsmnt) + 1); 420 421 hsched_fini(fsp->hqueue); 422 kmem_free(fsp->hqueue, sizeof (struct hsfs_queue)); 423 424 mutex_destroy(&fsp->hsfs_free_lock); 425 rw_destroy(&fsp->hsfs_hash_lock); 426 427 kmem_free(fsp, sizeof (*fsp)); 428 return (0); 429 } 430 431 /*ARGSUSED*/ 432 static int 433 hsfs_root(struct vfs *vfsp, struct vnode **vpp) 434 { 435 *vpp = (VFS_TO_HSFS(vfsp))->hsfs_rootvp; 436 VN_HOLD(*vpp); 437 return (0); 438 } 439 440 /*ARGSUSED*/ 441 static int 442 hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp) 443 { 444 struct hsfs *fsp; 445 dev32_t d32; 446 447 fsp = VFS_TO_HSFS(vfsp); 448 if (fsp->hsfs_magic != HSFS_MAGIC) 449 return (EINVAL); 450 bzero(sbp, sizeof (*sbp)); 451 sbp->f_bsize = vfsp->vfs_bsize; 452 sbp->f_frsize = sbp->f_bsize; /* no fragment, same as block size */ 453 sbp->f_blocks = (fsblkcnt64_t)fsp->hsfs_vol.vol_size; 454 455 sbp->f_bfree = (fsblkcnt64_t)0; 456 sbp->f_bavail = (fsblkcnt64_t)0; 457 sbp->f_files = (fsfilcnt64_t)-1; 458 sbp->f_ffree = (fsfilcnt64_t)0; 459 sbp->f_favail = (fsfilcnt64_t)0; 460 (void) cmpldev(&d32, vfsp->vfs_dev); 461 sbp->f_fsid = d32; 462 (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); 463 sbp->f_flag = vf_to_stf(vfsp->vfs_flag); 464 sbp->f_namemax = fsp->hsfs_namemax; 465 (void) strcpy(sbp->f_fstr, fsp->hsfs_vol.vol_id); 466 467 return (0); 468 } 469 470 /* 471 * Previously nodeid was declared as uint32_t. This has been changed 472 * to conform better with the ISO9660 standard. The standard states that 473 * a LBN can be a 32 bit number, as the MAKE_NODEID macro shifts this 474 * LBN 11 places left (LBN_TO_BYTE) and then shifts the result 5 right 475 * (divide by 32) we are left with the potential of an overflow if 476 * confined to a 32 bit value. 477 */ 478 479 static int 480 hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) 481 { 482 struct hsfid *fid; 483 struct hsfs *fsp; 484 ino64_t nodeid; 485 int error; 486 487 fsp = (struct hsfs *)VFS_TO_HSFS(vfsp); 488 fid = (struct hsfid *)fidp; 489 490 /* 491 * Look for vnode on hashlist. 492 * If found, it's now active and the refcnt was incremented. 493 */ 494 495 rw_enter(&fsp->hsfs_hash_lock, RW_READER); 496 497 nodeid = fid->hf_ino; 498 499 if ((*vpp = hs_findhash(nodeid, fid->hf_dir_lbn, 500 (uint_t)fid->hf_dir_off, vfsp)) == NULL) { 501 /* 502 * Not in cache, so we need to remake it. 503 * hs_remakenode() will read the directory entry 504 * and then check again to see if anyone else has 505 * put it in the cache. 506 */ 507 rw_exit(&fsp->hsfs_hash_lock); 508 error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, 509 vfsp, vpp); 510 return (error); 511 } 512 rw_exit(&fsp->hsfs_hash_lock); 513 return (0); 514 } 515 516 517 #define CHECKSUM_SIZE (64 * 1024) 518 519 /* 520 * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD 521 * We use the 'fsp' argument to determine the location of the root 522 * directory entry, and we start reading from there. 523 */ 524 static int 525 compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) 526 { 527 uint_t secno; 528 struct hs_volume *hsvp = &fsp->hsfs_vol; 529 struct buf *bp; 530 int error; 531 int fsid; 532 533 secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; 534 bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); 535 error = geterror(bp); 536 537 /* 538 * An error on read or a partial read means we asked 539 * for a nonexistant/corrupted piece of the device 540 * (including past-the-end of the media). Don't 541 * try to use the checksumming method then. 542 */ 543 if (!error && bp->b_bcount == CHECKSUM_SIZE) { 544 int *ibuf = (int *)bp->b_un.b_addr; 545 int i; 546 547 fsid = 0; 548 549 for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) 550 fsid ^= ibuf[ i ]; 551 } else { 552 /* 553 * Fallback - use creation date 554 */ 555 fsid = hsvp->cre_date.tv_sec; 556 } 557 558 brelse(bp); 559 560 return (fsid); 561 } 562 563 564 /*ARGSUSED*/ 565 static int 566 hs_mountfs( 567 struct vfs *vfsp, 568 dev_t dev, 569 char *path, 570 mode_t mode, 571 int mount_flags, 572 struct cred *cr, 573 int isroot) 574 { 575 struct vnode *devvp; 576 struct hsfs *tsp; 577 struct hsfs *fsp = NULL; 578 struct vattr vap; 579 struct hsnode *hp; 580 int error; 581 struct timeval tv; 582 int fsid; 583 int use_rrip; 584 int use_vers2; 585 int use_joliet; 586 int has_rrip = 0; 587 int has_vers2 = 0; 588 int has_joliet = 0; 589 int force_rrip_off; 590 int force_vers2_off; 591 int force_joliet_off; 592 size_t pathbufsz = strlen(path) + 1; 593 int redo_rootvp; 594 595 struct hs_volume *svp = NULL; /* Supplemental VD for ISO-9660:1999 */ 596 struct hs_volume *jvp = NULL; /* Joliet VD */ 597 598 /* 599 * The rules for which extension will be used are: 600 * 1. No specific mount options given: 601 * - use rrip if available 602 * - use ISO9660:1999 if available 603 * - use joliet if available. 604 * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: 605 * - use next "lower" extension 606 * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: 607 * - disable rrip support even if available 608 * - disable IOS9660:1999 support even if available 609 * 610 * We need to adjust these flags as we discover the extensions 611 * present. See below. These are just the starting values. 612 */ 613 use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; 614 use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; 615 use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; 616 617 /* 618 * Open the device 619 */ 620 devvp = makespecvp(dev, VBLK); 621 ASSERT(devvp != 0); 622 623 /* 624 * Open the target device (file) for read only. 625 */ 626 if (error = VOP_OPEN(&devvp, FREAD, cr, NULL)) { 627 VN_RELE(devvp); 628 return (error); 629 } 630 631 /* 632 * Refuse to go any further if this 633 * device is being used for swapping 634 */ 635 if (IS_SWAPVP(common_specvp(devvp))) { 636 error = EBUSY; 637 goto cleanup; 638 } 639 640 vap.va_mask = AT_SIZE; 641 if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr, NULL)) != 0) { 642 cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); 643 goto cleanup; 644 } 645 646 /* 647 * Make sure we have a nonzero size partition. 648 * The current version of the SD driver will *not* fail the open 649 * of such a partition so we have to check for it here. 650 */ 651 if (vap.va_size == 0) { 652 error = ENXIO; 653 goto cleanup; 654 } 655 656 /* 657 * Init a new hsfs structure. 658 */ 659 fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); 660 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); 661 jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); 662 663 /* hardwire perms, uid, gid */ 664 fsp->hsfs_vol.vol_uid = hsfs_default_uid; 665 fsp->hsfs_vol.vol_gid = hsfs_default_gid; 666 fsp->hsfs_vol.vol_prot = hsfs_default_mode; 667 svp->vol_uid = hsfs_default_uid; 668 svp->vol_gid = hsfs_default_gid; 669 svp->vol_prot = hsfs_default_mode; 670 jvp->vol_uid = hsfs_default_uid; 671 jvp->vol_gid = hsfs_default_gid; 672 jvp->vol_prot = hsfs_default_mode; 673 674 /* 675 * Look for a Standard File Structure Volume Descriptor, 676 * of which there must be at least one. 677 * If found, check for volume size consistency. 678 * 679 * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD 680 * If jvp->lbn_size is != 0, we did find a Joliet SVD. 681 */ 682 fsp->hsfs_namemax = ISO_FILE_NAMELEN; 683 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 684 error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); 685 if (error == EINVAL) /* no iso 9660 - try high sierra ... */ 686 error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); 687 688 if (error) 689 goto cleanup; 690 691 DTRACE_PROBE4(findvol, 692 struct hsfs *, fsp, 693 struct hs_volume *, &fsp->hsfs_vol, 694 struct hs_volume *, svp, 695 struct hs_volume *, jvp); 696 697 /* 698 * Generate a file system ID from the CD-ROM, 699 * and check it for uniqueness. 700 * 701 * What we are aiming for is some chance of integrity 702 * across disk change. That is, if a client has an fhandle, 703 * it will be valid as long as the same disk is mounted. 704 */ 705 fsid = compute_cdrom_id(fsp, devvp); 706 707 mutex_enter(&hs_mounttab_lock); 708 709 if (fsid == 0 || fsid == -1) { 710 uniqtime(&tv); 711 fsid = tv.tv_sec; 712 } else /* make sure that the fsid is unique */ 713 for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { 714 if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { 715 uniqtime(&tv); 716 fsid = tv.tv_sec; 717 break; 718 } 719 } 720 721 fsp->hsfs_next = hs_mounttab; 722 hs_mounttab = fsp; 723 724 fsp->hsfs_devvp = devvp; 725 fsp->hsfs_vfs = vfsp; 726 fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); 727 (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); 728 729 mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); 730 rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); 731 732 vfsp->vfs_data = (caddr_t)fsp; 733 vfsp->vfs_dev = dev; 734 vfsp->vfs_fstype = hsfsfstype; 735 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ 736 vfsp->vfs_fsid.val[0] = fsid; 737 vfsp->vfs_fsid.val[1] = hsfsfstype; 738 739 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 740 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 741 error = EINVAL; 742 goto cleanup; 743 } 744 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 745 746 /* 747 * Attempt to discover a RR extension. 748 */ 749 if (use_rrip) { 750 hp = VTOH(fsp->hsfs_rootvp); 751 hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); 752 } 753 754 has_rrip = IS_RRIP_IMPLEMENTED(fsp); 755 has_vers2 = (svp->lbn_size != 0); 756 has_joliet = (jvp->lbn_size != 0); 757 758 DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, 759 int, use_rrip, int, use_vers2, int, use_joliet); 760 761 DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, 762 int, has_rrip, int, has_vers2, int, has_joliet); 763 764 DTRACE_PROBE4(findvol, 765 struct hsfs *, fsp, 766 struct hs_volume *, &fsp->hsfs_vol, 767 struct hs_volume *, svp, 768 struct hs_volume *, jvp); 769 770 force_rrip_off = !use_rrip || 771 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || 772 (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); 773 774 force_vers2_off = !use_vers2 || 775 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); 776 777 force_joliet_off = !use_joliet; 778 779 DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, 780 int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); 781 782 /* 783 * At the moment, we have references of all three possible 784 * extensions (RR, ISO9660:1999/v2 and Joliet) if present. 785 * 786 * The "active" volume descriptor is RRIP (or ISO9660:1988). 787 * We now switch to the user-requested one. 788 */ 789 redo_rootvp = 0; 790 791 if (force_rrip_off || !has_rrip) { 792 if (has_vers2 && !force_vers2_off) { 793 VN_RELE(fsp->hsfs_rootvp); 794 bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 795 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; 796 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 797 redo_rootvp = 1; 798 has_joliet = 0; 799 } else if (has_joliet && !force_joliet_off) { 800 VN_RELE(fsp->hsfs_rootvp); 801 bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 802 fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; 803 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 804 redo_rootvp = 1; 805 has_vers2 = 0; 806 } 807 } 808 809 if (redo_rootvp) { 810 /* 811 * Make sure not to use Rock Ridge. 812 */ 813 UNSET_IMPL_BIT(fsp, RRIP_BIT); 814 UNSET_SUSP_BIT(fsp); 815 has_rrip = 0; 816 817 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 818 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 819 error = EINVAL; 820 goto cleanup; 821 } 822 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 823 } 824 if (IS_RRIP_IMPLEMENTED(fsp)) { 825 has_vers2 = 0; 826 has_joliet = 0; 827 } 828 if (force_vers2_off) 829 has_vers2 = 0; 830 if (force_joliet_off) 831 has_joliet = 0; 832 DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, 833 int, has_rrip, int, has_vers2, int, has_joliet); 834 835 /* 836 * mark root node as VROOT 837 */ 838 fsp->hsfs_rootvp->v_flag |= VROOT; 839 840 /* Here we take care of some special case stuff for mountroot */ 841 if (isroot) { 842 fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; 843 rootvp = fsp->hsfs_rootvp; 844 } 845 846 if (IS_RRIP_IMPLEMENTED(fsp)) { 847 /* 848 * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 849 */ 850 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 851 852 fsp->hsfs_namemax = RRIP_FILE_NAMELEN; 853 fsp->hsfs_namelen = RRIP_FILE_NAMELEN; 854 855 ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); 856 vfs_clearmntopt(vfsp, HOPT_VERS2); 857 vfs_clearmntopt(vfsp, HOPT_JOLIET); 858 859 } else switch (fsp->hsfs_vol_type) { 860 861 case HS_VOL_TYPE_HS: 862 case HS_VOL_TYPE_ISO: 863 default: 864 /* 865 * if iso v1, don't allow trailing spaces in iso file names 866 */ 867 mount_flags |= HSFSMNT_NOTRAILSPACE; 868 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 869 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 870 vfs_clearmntopt(vfsp, HOPT_RR); 871 vfs_clearmntopt(vfsp, HOPT_VERS2); 872 vfs_clearmntopt(vfsp, HOPT_JOLIET); 873 break; 874 875 case HS_VOL_TYPE_ISO_V2: 876 /* 877 * if iso v2, don't copy NOTRAILDOT to hsfs_flags 878 */ 879 mount_flags &= ~HSFSMNT_NOTRAILDOT; 880 mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; 881 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 882 fsp->hsfs_namelen = ISO_NAMELEN_V2; 883 vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); 884 vfs_clearmntopt(vfsp, HOPT_RR); 885 vfs_clearmntopt(vfsp, HOPT_JOLIET); 886 break; 887 888 case HS_VOL_TYPE_JOLIET: 889 /* 890 * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 891 */ 892 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 893 mount_flags |= HSFSMNT_NOMAPLCASE; 894 if (mount_flags & HSFSMNT_JOLIETLONG) 895 fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ 896 else 897 fsp->hsfs_namemax = MAXNAMELEN-1; 898 fsp->hsfs_namelen = JOLIET_NAMELEN*2; 899 vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); 900 vfs_clearmntopt(vfsp, HOPT_RR); 901 vfs_clearmntopt(vfsp, HOPT_VERS2); 902 break; 903 } 904 905 /* 906 * Add the HSFSMNT_INODE pseudo mount flag to the current mount flags. 907 */ 908 fsp->hsfs_flags = mount_flags | (fsp->hsfs_flags & HSFSMNT_INODE); 909 910 /* 911 * Setup I/O Scheduling structures 912 */ 913 if (do_schedio) { 914 fsp->hqueue = kmem_alloc(sizeof (struct hsfs_queue), KM_SLEEP); 915 hsched_init(fsp, fsid, &modlinkage); 916 } 917 918 /* 919 * Setup kstats 920 */ 921 hsfs_init_kstats(fsp, fsid); 922 923 DTRACE_PROBE1(mount__done, struct hsfs *, fsp); 924 925 /* 926 * set the magic word 927 */ 928 fsp->hsfs_magic = HSFS_MAGIC; 929 mutex_exit(&hs_mounttab_lock); 930 931 kmem_free(svp, sizeof (*svp)); 932 kmem_free(jvp, sizeof (*jvp)); 933 934 return (0); 935 936 cleanup: 937 (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr, NULL); 938 VN_RELE(devvp); 939 if (fsp) 940 kmem_free(fsp, sizeof (*fsp)); 941 if (svp) 942 kmem_free(svp, sizeof (*svp)); 943 if (jvp) 944 kmem_free(jvp, sizeof (*jvp)); 945 return (error); 946 } 947 948 /* 949 * Get the rootvp associated with fsp->hsfs_vol 950 */ 951 static int 952 hs_getrootvp( 953 struct vfs *vfsp, 954 struct hsfs *fsp, 955 size_t pathsize) 956 { 957 struct hsnode *hp; 958 959 ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); 960 961 /* 962 * If the root directory does not appear to be 963 * valid, use what it points to as "." instead. 964 * Some Defense Mapping Agency disks are non-conformant 965 * in this way. 966 */ 967 if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { 968 hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); 969 if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, 970 (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { 971 hs_mounttab = hs_mounttab->hsfs_next; 972 mutex_destroy(&fsp->hsfs_free_lock); 973 rw_destroy(&fsp->hsfs_hash_lock); 974 kmem_free(fsp->hsfs_fsmnt, pathsize); 975 mutex_exit(&hs_mounttab_lock); 976 return (0); 977 } 978 } else { 979 fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, 980 fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); 981 } 982 983 /* XXX - ignore the path table for now */ 984 fsp->hsfs_ptbl = NULL; 985 hp = VTOH(fsp->hsfs_rootvp); 986 hp->hs_ptbl_idx = NULL; 987 988 return (1); 989 } 990 991 /* 992 * hs_findhsvol() 993 * 994 * Locate the Standard File Structure Volume Descriptor and 995 * parse it into an hs_volume structure. 996 * 997 * XXX - May someday want to look for Coded Character Set FSVD, too. 998 */ 999 static int 1000 hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) 1001 { 1002 struct buf *secbp; 1003 int i; 1004 int n; 1005 uchar_t *volp; 1006 int error; 1007 uint_t secno; 1008 1009 secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); 1010 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1011 error = geterror(secbp); 1012 1013 if (error != 0) { 1014 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); 1015 brelse(secbp); 1016 return (error); 1017 } 1018 1019 volp = (uchar_t *)secbp->b_un.b_addr; 1020 1021 /* 1022 * To avoid that we read the whole medium in case that someone prepares 1023 * a malicious "fs image", we read at most 32 blocks. 1024 */ 1025 for (n = 0; n < 32 && 1026 HSV_DESC_TYPE(volp) != VD_EOV; n++) { 1027 for (i = 0; i < HSV_ID_STRLEN; i++) 1028 if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) 1029 goto cantfind; 1030 if (HSV_STD_VER(volp) != HSV_ID_VER) 1031 goto cantfind; 1032 switch (HSV_DESC_TYPE(volp)) { 1033 case VD_SFS: 1034 /* Standard File Structure */ 1035 fsp->hsfs_vol_type = HS_VOL_TYPE_HS; 1036 error = hs_parsehsvol(fsp, volp, hvp); 1037 brelse(secbp); 1038 return (error); 1039 1040 case VD_CCFS: 1041 /* Coded Character File Structure */ 1042 case VD_BOOT: 1043 case VD_UNSPEC: 1044 case VD_EOV: 1045 break; 1046 } 1047 brelse(secbp); 1048 ++secno; 1049 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1050 1051 error = geterror(secbp); 1052 1053 if (error != 0) { 1054 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", 1055 error); 1056 brelse(secbp); 1057 return (error); 1058 } 1059 1060 volp = (uchar_t *)secbp->b_un.b_addr; 1061 } 1062 cantfind: 1063 brelse(secbp); 1064 return (EINVAL); 1065 } 1066 1067 /* 1068 * hs_parsehsvol 1069 * 1070 * Parse the Standard File Structure Volume Descriptor into 1071 * an hs_volume structure. We can't just bcopy it into the 1072 * structure because of byte-ordering problems. 1073 * 1074 */ 1075 static int 1076 hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1077 { 1078 hvp->vol_size = HSV_VOL_SIZE(volp); 1079 hvp->lbn_size = HSV_BLK_SIZE(volp); 1080 if (hvp->lbn_size == 0) { 1081 cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " 1082 "SFSVD is zero"); 1083 return (EINVAL); 1084 } 1085 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1086 hvp->lbn_secshift = 1087 ffs((long)howmany(HS_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; 1088 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1089 hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); 1090 hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); 1091 hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); 1092 hvp->ptbl_len = HSV_PTBL_SIZE(volp); 1093 hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); 1094 hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); 1095 #if defined(_LITTLE_ENDIAN) 1096 hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); 1097 #else 1098 hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); 1099 #endif 1100 hs_copylabel(hvp, HSV_VOL_ID(volp), 0); 1101 1102 /* 1103 * Make sure that lbn_size is a power of two and otherwise valid. 1104 */ 1105 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1106 cmn_err(CE_NOTE, 1107 "hsfs: %d-byte logical block size not supported", 1108 hvp->lbn_size); 1109 return (EINVAL); 1110 } 1111 return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, 1112 (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); 1113 } 1114 1115 /* 1116 * hs_findisovol() 1117 * 1118 * Locate the Primary Volume Descriptor 1119 * parse it into an hs_volume structure. 1120 * 1121 * XXX - Partition not yet done 1122 * 1123 * Except for fsp->hsfs_vol_type, no fsp member may be modified. 1124 * fsp->hsfs_vol is modified indirectly via the *hvp argument. 1125 */ 1126 static int 1127 hs_findisovol(struct hsfs *fsp, struct vnode *vp, 1128 struct hs_volume *hvp, 1129 struct hs_volume *svp, 1130 struct hs_volume *jvp) 1131 { 1132 struct buf *secbp; 1133 int i; 1134 int n; 1135 uchar_t *volp; 1136 int error; 1137 uint_t secno; 1138 int foundpvd = 0; 1139 int foundsvd = 0; 1140 int foundjvd = 0; 1141 int pvd_sum = 0; 1142 1143 secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); 1144 secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); 1145 error = geterror(secbp); 1146 1147 if (error != 0) { 1148 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); 1149 brelse(secbp); 1150 return (error); 1151 } 1152 1153 volp = (uchar_t *)secbp->b_un.b_addr; 1154 1155 /* 1156 * To avoid that we read the whole medium in case that someone prepares 1157 * a malicious "fs image", we read at most 32 blocks. 1158 */ 1159 for (n = 0; n < 32 && ISO_DESC_TYPE(volp) != ISO_VD_EOV; n++) { 1160 for (i = 0; i < ISO_ID_STRLEN; i++) 1161 if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) 1162 goto cantfind; 1163 switch (ISO_DESC_TYPE(volp)) { 1164 case ISO_VD_PVD: 1165 /* Standard File Structure */ 1166 if (ISO_STD_VER(volp) != ISO_ID_VER) 1167 goto cantfind; 1168 if (foundpvd != 1) { 1169 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1170 if (error = hs_parseisovol(fsp, volp, hvp)) { 1171 brelse(secbp); 1172 return (error); 1173 } 1174 foundpvd = 1; 1175 for (i = 0; i < ISO_SECTOR_SIZE; i++) 1176 pvd_sum += volp[i]; 1177 } 1178 break; 1179 case ISO_VD_SVD: 1180 /* Supplementary Volume Descriptor */ 1181 if (ISO_STD_VER(volp) == ISO_ID_VER2 && 1182 foundsvd != 1) { 1183 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1184 if (error = hs_parseisovol(fsp, volp, svp)) { 1185 brelse(secbp); 1186 return (error); 1187 } 1188 foundsvd = 1; 1189 } 1190 if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { 1191 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1192 if (error = hs_parseisovol(fsp, volp, jvp)) { 1193 brelse(secbp); 1194 return (error); 1195 } 1196 foundjvd = 1; 1197 } 1198 break; 1199 case ISO_VD_BOOT: 1200 break; 1201 case ISO_VD_VPD: 1202 /* currently cannot handle partition */ 1203 break; 1204 case VD_EOV: 1205 break; 1206 } 1207 brelse(secbp); 1208 ++secno; 1209 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1210 error = geterror(secbp); 1211 1212 if (error != 0) { 1213 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1214 error); 1215 brelse(secbp); 1216 return (error); 1217 } 1218 1219 volp = (uchar_t *)secbp->b_un.b_addr; 1220 } 1221 for (n = 0; n < 16; n++) { 1222 brelse(secbp); 1223 ++secno; 1224 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1225 error = geterror(secbp); 1226 1227 if (error != 0) { 1228 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1229 error); 1230 brelse(secbp); 1231 return (error); 1232 } 1233 1234 /* 1235 * Check for the signature from mkisofs that grants that 1236 * the current filesystem allows to use the extent lbn as 1237 * inode number even in pure ISO9660 mode. 1238 */ 1239 volp = (uchar_t *)secbp->b_un.b_addr; 1240 if (strncmp((char *)volp, "MKI ", 4) == 0) { 1241 int sum; 1242 1243 sum = volp[2045]; 1244 sum *= 256; 1245 sum += volp[2046]; 1246 sum *= 256; 1247 sum += volp[2047]; 1248 if (sum == pvd_sum) 1249 fsp->hsfs_flags |= HSFSMNT_INODE; 1250 break; 1251 } 1252 } 1253 if (foundpvd) { 1254 brelse(secbp); 1255 return (0); 1256 } 1257 cantfind: 1258 brelse(secbp); 1259 return (EINVAL); 1260 } 1261 1262 /* 1263 * Return 0 if no Joliet is found 1264 * else return Joliet Level 1..3 1265 */ 1266 static int 1267 hs_joliet_level(uchar_t *volp) 1268 { 1269 if (ISO_std_ver(volp)[0] == ISO_ID_VER && 1270 ISO_svd_esc(volp)[0] == '%' && 1271 ISO_svd_esc(volp)[1] == '/') { 1272 1273 switch (ISO_svd_esc(volp)[2]) { 1274 1275 case '@': 1276 return (1); 1277 case 'C': 1278 return (2); 1279 case 'E': 1280 return (3); 1281 } 1282 } 1283 return (0); 1284 } 1285 1286 /* 1287 * hs_parseisovol 1288 * 1289 * Parse the Primary Volume Descriptor into an hs_volume structure. 1290 * 1291 */ 1292 static int 1293 hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1294 { 1295 hvp->vol_size = ISO_VOL_SIZE(volp); 1296 hvp->lbn_size = ISO_BLK_SIZE(volp); 1297 if (hvp->lbn_size == 0) { 1298 cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " 1299 "PVD is zero"); 1300 return (EINVAL); 1301 } 1302 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1303 hvp->lbn_secshift = 1304 ffs((long)howmany(ISO_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; 1305 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1306 hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); 1307 hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); 1308 hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); 1309 hvp->ptbl_len = ISO_PTBL_SIZE(volp); 1310 hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); 1311 hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); 1312 #if defined(_LITTLE_ENDIAN) 1313 hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); 1314 #else 1315 hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); 1316 #endif 1317 hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); 1318 1319 /* 1320 * Make sure that lbn_size is a power of two and otherwise valid. 1321 */ 1322 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1323 cmn_err(CE_NOTE, 1324 "hsfs: %d-byte logical block size not supported", 1325 hvp->lbn_size); 1326 return (EINVAL); 1327 } 1328 return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, 1329 (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); 1330 } 1331 1332 /* 1333 * Common code for mount and umount. 1334 * Check that the user's argument is a reasonable 1335 * thing on which to mount, and return the device number if so. 1336 */ 1337 static int 1338 hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, 1339 cred_t *cr) 1340 { 1341 int error; 1342 struct vnode *svp = NULL; 1343 struct vnode *lvp = NULL; 1344 struct vnode *bvp; 1345 struct vattr vap; 1346 dev_t dev; 1347 enum uio_seg fromspace = (flags & MS_SYSSPACE) ? 1348 UIO_SYSSPACE : UIO_USERSPACE; 1349 1350 /* 1351 * Look up the device/file to be mounted. 1352 */ 1353 error = lookupname(fspec, fromspace, FOLLOW, NULLVPP, &svp); 1354 if (error) { 1355 if (error == ENOENT) 1356 error = ENODEV; 1357 goto out; 1358 } 1359 1360 error = vfs_get_lofi(vfsp, &lvp); 1361 1362 if (error > 0) { 1363 if (error == ENOENT) 1364 error = ENODEV; 1365 goto out; 1366 } else if (error == 0) { 1367 bvp = lvp; 1368 } else { 1369 bvp = svp; 1370 1371 if (bvp->v_type != VBLK) { 1372 error = ENOTBLK; 1373 goto out; 1374 } 1375 1376 if ((error = secpolicy_spec_open(cr, bvp, FREAD)) != 0) 1377 goto out; 1378 } 1379 1380 /* 1381 * Can we read from the device/file ? 1382 */ 1383 if ((error = VOP_ACCESS(svp, VREAD, 0, cr, NULL)) != 0) 1384 goto out; 1385 1386 vap.va_mask = AT_MODE; /* get protection mode */ 1387 (void) VOP_GETATTR(bvp, &vap, 0, CRED(), NULL); 1388 *mode = vap.va_mode; 1389 1390 dev = *pdev = bvp->v_rdev; 1391 1392 error = EBUSY; 1393 1394 /* 1395 * Ensure that this device isn't already mounted, 1396 * unless this is a REMOUNT request or we are told to suppress 1397 * mount checks. 1398 */ 1399 if ((flags & MS_NOCHECK) == 0) { 1400 if (vfs_devmounting(dev, vfsp)) 1401 goto out; 1402 if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) 1403 goto out; 1404 } 1405 1406 if (getmajor(*pdev) >= devcnt) { 1407 error = ENXIO; 1408 goto out; 1409 } 1410 1411 error = 0; 1412 out: 1413 if (svp != NULL) 1414 VN_RELE(svp); 1415 if (lvp != NULL) 1416 VN_RELE(lvp); 1417 return (error); 1418 } 1419 1420 static void 1421 hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) 1422 { 1423 char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ 1424 1425 if (isjoliet) { 1426 /* 1427 * hs_joliet_cp() will output 16..48 bytes. 1428 * We need to clear 'lbuf' to avoid junk chars past byte 15. 1429 */ 1430 bzero(lbuf, sizeof (lbuf)); 1431 (void) hs_joliet_cp((char *)label, lbuf, 32); 1432 label = (unsigned char *)lbuf; 1433 } 1434 /* cdrom volid is at most 32 bytes */ 1435 bcopy(label, hvp->vol_id, 32); 1436 hvp->vol_id[31] = NULL; 1437 } 1438 1439 /* 1440 * Mount root file system. 1441 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to 1442 * remount the root file system, and ROOT_UNMOUNT if called to 1443 * unmount the root (e.g., as part of a system shutdown). 1444 * 1445 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP 1446 * operation, goes along with auto-configuration. A mechanism should be 1447 * provided by which machine-INdependent code in the kernel can say "get me the 1448 * right root file system" and "get me the right initial swap area", and have 1449 * that done in what may well be a machine-dependent fashion. 1450 * Unfortunately, it is also file-system-type dependent (NFS gets it via 1451 * bootparams calls, UFS gets it from various and sundry machine-dependent 1452 * mechanisms, as SPECFS does for swap). 1453 */ 1454 static int 1455 hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) 1456 { 1457 int error; 1458 struct hsfs *fsp; 1459 struct hs_volume *fvolp; 1460 static int hsfsrootdone = 0; 1461 dev_t rootdev; 1462 mode_t mode = 0; 1463 1464 if (why == ROOT_INIT) { 1465 if (hsfsrootdone++) 1466 return (EBUSY); 1467 rootdev = getrootdev(); 1468 if (rootdev == (dev_t)NODEV) 1469 return (ENODEV); 1470 vfsp->vfs_dev = rootdev; 1471 vfsp->vfs_flag |= VFS_RDONLY; 1472 } else if (why == ROOT_REMOUNT) { 1473 cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); 1474 return (0); 1475 } else if (why == ROOT_UNMOUNT) { 1476 return (0); 1477 } 1478 error = vfs_lock(vfsp); 1479 if (error) { 1480 cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); 1481 return (error); 1482 } 1483 1484 error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); 1485 /* 1486 * XXX - assumes root device is not indirect, because we don't set 1487 * rootvp. Is rootvp used for anything? If so, make another arg 1488 * to mountfs. 1489 */ 1490 if (error) { 1491 vfs_unlock(vfsp); 1492 if (rootvp) { 1493 VN_RELE(rootvp); 1494 rootvp = (struct vnode *)0; 1495 } 1496 return (error); 1497 } 1498 if (why == ROOT_INIT) 1499 vfs_add((struct vnode *)0, vfsp, 1500 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1501 vfs_unlock(vfsp); 1502 fsp = VFS_TO_HSFS(vfsp); 1503 fvolp = &fsp->hsfs_vol; 1504 #ifdef HSFS_CLKSET 1505 if (fvolp->cre_date.tv_sec == 0) { 1506 cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); 1507 if (fvolp->mod_date.tv_sec == 0) { 1508 cmn_err(CE_NOTE, 1509 "hsfs_mountroot: mod_date.tv_sec == 0"); 1510 cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); 1511 clkset(-1L); 1512 } else { 1513 clkset(fvolp->mod_date.tv_sec); 1514 } 1515 } else { 1516 clkset(fvolp->mod_date.tv_sec); 1517 } 1518 #else /* HSFS_CLKSET */ 1519 clkset(-1L); 1520 #endif /* HSFS_CLKSET */ 1521 return (0); 1522 } 1523 1524 /* 1525 * hs_findvoldesc() 1526 * 1527 * Return the sector where the volume descriptor lives. This is 1528 * a fixed value for "normal" cd-rom's, but can change for 1529 * multisession cd's. 1530 * 1531 * desc_sec is the same for high-sierra and iso 9660 formats, why 1532 * there are two different #defines used in the code for this is 1533 * beyond me. These are standards, cast in concrete, right? 1534 * To be general, however, this function supports passing in different 1535 * values. 1536 */ 1537 static int 1538 hs_findvoldesc(dev_t rdev, int desc_sec) 1539 { 1540 int secno; 1541 int error; 1542 int rval; /* ignored */ 1543 1544 #ifdef CDROMREADOFFSET 1545 /* 1546 * Issue the Read Offset ioctl directly to the 1547 * device. Ignore any errors and set starting 1548 * secno to the default, otherwise add the 1549 * VOLDESC sector number to the offset. 1550 */ 1551 error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, 1552 FNATIVE|FKIOCTL|FREAD, CRED(), &rval); 1553 if (error) { 1554 secno = desc_sec; 1555 } else { 1556 secno += desc_sec; 1557 } 1558 #else 1559 secno = desc_sec; 1560 #endif 1561 1562 return (secno); 1563 } 1564