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 #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 /* 141 * Indicates whether to enable the I/O scheduling and readahead logic 142 * 1 - Enable, 0 - Do not Enable. 143 * Debugging purposes. 144 */ 145 int do_schedio = 1; 146 static int hsfsfstype; 147 static int hsfsinit(int, char *); 148 149 static vfsdef_t vfw = { 150 VFSDEF_VERSION, 151 "hsfs", 152 hsfsinit, 153 /* We don't suppport remounting */ 154 VSW_HASPROTO|VSW_STATS|VSW_CANLOFI, 155 &hsfs_proto_opttbl 156 }; 157 158 static struct modlfs modlfs = { 159 &mod_fsops, "filesystem for HSFS", &vfw 160 }; 161 162 static struct modlinkage modlinkage = { 163 MODREV_1, (void *)&modlfs, NULL 164 }; 165 166 char _depends_on[] = "fs/specfs"; 167 168 extern void hsched_init_caches(void); 169 extern void hsched_fini_caches(void); 170 171 172 int 173 _init(void) 174 { 175 return (mod_install(&modlinkage)); 176 } 177 178 int 179 _fini(void) 180 { 181 int error; 182 183 error = mod_remove(&modlinkage); 184 185 DTRACE_PROBE1(mod_remove, int, error); 186 187 if (error) 188 return (error); 189 190 mutex_destroy(&hs_mounttab_lock); 191 192 /* 193 * Tear down the operations vectors 194 */ 195 (void) vfs_freevfsops_by_type(hsfsfstype); 196 vn_freevnodeops(hsfs_vnodeops); 197 198 hs_fini_hsnode_cache(); 199 hsched_fini_caches(); 200 return (0); 201 } 202 203 int 204 _info(struct modinfo *modinfop) 205 { 206 return (mod_info(&modlinkage, modinfop)); 207 } 208 209 #define BDEVFLAG(dev) ((devopsp[getmajor(dev)])->devo_cb_ops->cb_flag) 210 211 kmutex_t hs_mounttab_lock; 212 struct hsfs *hs_mounttab = NULL; 213 214 /* default mode, uid, gid */ 215 mode_t hsfs_default_mode = 0555; 216 uid_t hsfs_default_uid = 0; 217 gid_t hsfs_default_gid = 3; 218 219 extern void hsched_init(struct hsfs *fsp, int fsid, 220 struct modlinkage *modlinkage); 221 extern void hsched_fini(struct hsfs_queue *hqueue); 222 extern void hsfs_init_kstats(struct hsfs *fsp, int fsid); 223 extern void hsfs_fini_kstats(struct hsfs *fsp); 224 225 static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 226 struct mounta *uap, struct cred *cr); 227 static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); 228 static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); 229 static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); 230 static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); 231 static int hsfs_mountroot(struct vfs *, enum whymountroot); 232 233 static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, 234 mode_t mode, int flags, struct cred *cr, int isroot); 235 static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); 236 static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, 237 struct hs_volume *hvp); 238 static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, 239 struct hs_volume *hvp); 240 static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, 241 struct hs_volume *hvp, 242 struct hs_volume *svp, 243 struct hs_volume *jvp); 244 static int hs_joliet_level(uchar_t *volp); 245 static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, 246 struct hs_volume *hvp); 247 static void hs_copylabel(struct hs_volume *, unsigned char *, int); 248 static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, 249 mode_t *mode, cred_t *cr); 250 static int hs_findvoldesc(dev_t rdev, int desc_sec); 251 252 static int 253 hsfsinit(int fstype, char *name) 254 { 255 static const fs_operation_def_t hsfs_vfsops_template[] = { 256 VFSNAME_MOUNT, { .vfs_mount = hsfs_mount }, 257 VFSNAME_UNMOUNT, { .vfs_unmount = hsfs_unmount }, 258 VFSNAME_ROOT, { .vfs_root = hsfs_root }, 259 VFSNAME_STATVFS, { .vfs_statvfs = hsfs_statvfs }, 260 VFSNAME_VGET, { .vfs_vget = hsfs_vget }, 261 VFSNAME_MOUNTROOT, { .vfs_mountroot = hsfs_mountroot }, 262 NULL, NULL 263 }; 264 int error; 265 266 error = vfs_setfsops(fstype, hsfs_vfsops_template, NULL); 267 if (error != 0) { 268 cmn_err(CE_WARN, "hsfsinit: bad vfs ops template"); 269 return (error); 270 } 271 272 error = vn_make_ops(name, hsfs_vnodeops_template, &hsfs_vnodeops); 273 if (error != 0) { 274 (void) vfs_freevfsops_by_type(fstype); 275 cmn_err(CE_WARN, "hsfsinit: bad vnode ops template"); 276 return (error); 277 } 278 279 hsfsfstype = fstype; 280 mutex_init(&hs_mounttab_lock, NULL, MUTEX_DEFAULT, NULL); 281 hs_init_hsnode_cache(); 282 hsched_init_caches(); 283 return (0); 284 } 285 286 /*ARGSUSED*/ 287 static int 288 hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 289 struct mounta *uap, struct cred *cr) 290 { 291 int vnode_busy; 292 dev_t dev; 293 struct pathname dpn; 294 int error; 295 mode_t mode; 296 int flags; /* this will hold the mount specific data */ 297 298 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) 299 return (error); 300 301 if (mvp->v_type != VDIR) 302 return (ENOTDIR); 303 304 /* mount option must be read only, else mount will be rejected */ 305 if (!(uap->flags & MS_RDONLY)) 306 return (EROFS); 307 308 /* 309 * We already told the framework that we don't support remounting. 310 */ 311 ASSERT(!(uap->flags & MS_REMOUNT)); 312 313 mutex_enter(&mvp->v_lock); 314 vnode_busy = (mvp->v_count != 1) || (mvp->v_flag & VROOT); 315 mutex_exit(&mvp->v_lock); 316 317 if ((uap->flags & MS_OVERLAY) == 0 && vnode_busy) { 318 return (EBUSY); 319 } 320 321 /* 322 * Check for the options that actually affect things 323 * at our level. 324 */ 325 flags = 0; 326 if (vfs_optionisset(vfsp, HOPT_NOMAPLCASE, NULL)) 327 flags |= HSFSMNT_NOMAPLCASE; 328 if (vfs_optionisset(vfsp, HOPT_NOTRAILDOT, NULL)) 329 flags |= HSFSMNT_NOTRAILDOT; 330 if (vfs_optionisset(vfsp, HOPT_NRR, NULL)) 331 flags |= HSFSMNT_NORRIP; 332 if (vfs_optionisset(vfsp, HOPT_NOJOLIET, NULL)) 333 flags |= HSFSMNT_NOJOLIET; 334 if (vfs_optionisset(vfsp, HOPT_JOLIETLONG, NULL)) 335 flags |= HSFSMNT_JOLIETLONG; 336 if (vfs_optionisset(vfsp, HOPT_NOVERS2, NULL)) 337 flags |= HSFSMNT_NOVERS2; 338 339 error = pn_get(uap->dir, (uap->flags & MS_SYSSPACE) ? 340 UIO_SYSSPACE : UIO_USERSPACE, &dpn); 341 if (error) 342 return (error); 343 344 error = hs_getmdev(vfsp, uap->spec, uap->flags, &dev, &mode, cr); 345 if (error != 0) { 346 pn_free(&dpn); 347 return (error); 348 } 349 350 /* 351 * If the device is a tape, return error 352 */ 353 if ((BDEVFLAG(dev) & D_TAPE) == D_TAPE) { 354 pn_free(&dpn); 355 return (ENOTBLK); 356 } 357 358 /* 359 * Mount the filesystem. 360 */ 361 error = hs_mountfs(vfsp, dev, dpn.pn_path, mode, flags, cr, 0); 362 pn_free(&dpn); 363 return (error); 364 } 365 366 /*ARGSUSED*/ 367 static int 368 hsfs_unmount( 369 struct vfs *vfsp, 370 int flag, 371 struct cred *cr) 372 { 373 struct hsfs **tspp; 374 struct hsfs *fsp; 375 376 if (secpolicy_fs_unmount(cr, vfsp) != 0) 377 return (EPERM); 378 379 /* 380 * forced unmount is not supported by this file system 381 * and thus, ENOTSUP is being returned. 382 */ 383 if (flag & MS_FORCE) 384 return (ENOTSUP); 385 386 fsp = VFS_TO_HSFS(vfsp); 387 388 if (fsp->hsfs_rootvp->v_count != 1) 389 return (EBUSY); 390 391 /* destroy all old pages and hsnodes for this vfs */ 392 if (hs_synchash(vfsp)) 393 return (EBUSY); 394 395 mutex_enter(&hs_mounttab_lock); 396 for (tspp = &hs_mounttab; *tspp != NULL; tspp = &(*tspp)->hsfs_next) { 397 if (*tspp == fsp) 398 break; 399 } 400 if (*tspp == NULL) { 401 mutex_exit(&hs_mounttab_lock); 402 panic("hsfs_unmount: vfs not mounted?"); 403 /*NOTREACHED*/ 404 } 405 406 *tspp = fsp->hsfs_next; 407 408 mutex_exit(&hs_mounttab_lock); 409 410 hsfs_fini_kstats(fsp); 411 (void) VOP_CLOSE(fsp->hsfs_devvp, FREAD, 1, (offset_t)0, cr, NULL); 412 VN_RELE(fsp->hsfs_devvp); 413 /* free path table space */ 414 if (fsp->hsfs_ptbl != NULL) 415 kmem_free(fsp->hsfs_ptbl, (size_t)fsp->hsfs_vol.ptbl_len); 416 /* free path table index table */ 417 if (fsp->hsfs_ptbl_idx != NULL) 418 kmem_free(fsp->hsfs_ptbl_idx, (size_t) 419 (fsp->hsfs_ptbl_idx_size * sizeof (struct ptable_idx))); 420 421 /* free "mounted on" pathame */ 422 if (fsp->hsfs_fsmnt != NULL) 423 kmem_free(fsp->hsfs_fsmnt, strlen(fsp->hsfs_fsmnt) + 1); 424 425 hsched_fini(fsp->hqueue); 426 kmem_free(fsp->hqueue, sizeof (struct hsfs_queue)); 427 428 mutex_destroy(&fsp->hsfs_free_lock); 429 rw_destroy(&fsp->hsfs_hash_lock); 430 431 kmem_free(fsp, sizeof (*fsp)); 432 return (0); 433 } 434 435 /*ARGSUSED*/ 436 static int 437 hsfs_root(struct vfs *vfsp, struct vnode **vpp) 438 { 439 *vpp = (VFS_TO_HSFS(vfsp))->hsfs_rootvp; 440 VN_HOLD(*vpp); 441 return (0); 442 } 443 444 /*ARGSUSED*/ 445 static int 446 hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp) 447 { 448 struct hsfs *fsp; 449 dev32_t d32; 450 451 fsp = VFS_TO_HSFS(vfsp); 452 if (fsp->hsfs_magic != HSFS_MAGIC) 453 return (EINVAL); 454 bzero(sbp, sizeof (*sbp)); 455 sbp->f_bsize = vfsp->vfs_bsize; 456 sbp->f_frsize = sbp->f_bsize; /* no fragment, same as block size */ 457 sbp->f_blocks = (fsblkcnt64_t)fsp->hsfs_vol.vol_size; 458 459 sbp->f_bfree = (fsblkcnt64_t)0; 460 sbp->f_bavail = (fsblkcnt64_t)0; 461 sbp->f_files = (fsfilcnt64_t)-1; 462 sbp->f_ffree = (fsfilcnt64_t)0; 463 sbp->f_favail = (fsfilcnt64_t)0; 464 (void) cmpldev(&d32, vfsp->vfs_dev); 465 sbp->f_fsid = d32; 466 (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); 467 sbp->f_flag = vf_to_stf(vfsp->vfs_flag); 468 sbp->f_namemax = fsp->hsfs_namemax; 469 (void) strcpy(sbp->f_fstr, fsp->hsfs_vol.vol_id); 470 471 return (0); 472 } 473 474 /* 475 * Previously nodeid was declared as uint32_t. This has been changed 476 * to conform better with the ISO9660 standard. The standard states that 477 * a LBN can be a 32 bit number, as the MAKE_NODEID macro shifts this 478 * LBN 11 places left (LBN_TO_BYTE) and then shifts the result 5 right 479 * (divide by 32) we are left with the potential of an overflow if 480 * confined to a 32 bit value. 481 */ 482 483 static int 484 hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp) 485 { 486 struct hsfid *fid; 487 struct hsfs *fsp; 488 ino64_t nodeid; 489 int error; 490 491 fsp = (struct hsfs *)VFS_TO_HSFS(vfsp); 492 fid = (struct hsfid *)fidp; 493 494 /* 495 * Look for vnode on hashlist. 496 * If found, it's now active and the refcnt was incremented. 497 */ 498 499 rw_enter(&fsp->hsfs_hash_lock, RW_READER); 500 501 nodeid = fid->hf_ino; 502 503 if ((*vpp = hs_findhash(nodeid, fid->hf_dir_lbn, 504 (uint_t)fid->hf_dir_off, vfsp)) == NULL) { 505 /* 506 * Not in cache, so we need to remake it. 507 * hs_remakenode() will read the directory entry 508 * and then check again to see if anyone else has 509 * put it in the cache. 510 */ 511 rw_exit(&fsp->hsfs_hash_lock); 512 error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, 513 vfsp, vpp); 514 return (error); 515 } 516 rw_exit(&fsp->hsfs_hash_lock); 517 return (0); 518 } 519 520 521 #define CHECKSUM_SIZE (64 * 1024) 522 523 /* 524 * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD 525 * We use the 'fsp' argument to determine the location of the root 526 * directory entry, and we start reading from there. 527 */ 528 static int 529 compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) 530 { 531 uint_t secno; 532 struct hs_volume *hsvp = &fsp->hsfs_vol; 533 struct buf *bp; 534 int error; 535 int fsid; 536 537 secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; 538 bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); 539 error = geterror(bp); 540 541 /* 542 * An error on read or a partial read means we asked 543 * for a nonexistant/corrupted piece of the device 544 * (including past-the-end of the media). Don't 545 * try to use the checksumming method then. 546 */ 547 if (!error && bp->b_bcount == CHECKSUM_SIZE) { 548 int *ibuf = (int *)bp->b_un.b_addr; 549 int i; 550 551 fsid = 0; 552 553 for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) 554 fsid ^= ibuf[ i ]; 555 } else { 556 /* 557 * Fallback - use creation date 558 */ 559 fsid = hsvp->cre_date.tv_sec; 560 } 561 562 brelse(bp); 563 564 return (fsid); 565 } 566 567 568 /*ARGSUSED*/ 569 static int 570 hs_mountfs( 571 struct vfs *vfsp, 572 dev_t dev, 573 char *path, 574 mode_t mode, 575 int mount_flags, 576 struct cred *cr, 577 int isroot) 578 { 579 struct vnode *devvp; 580 struct hsfs *tsp; 581 struct hsfs *fsp = NULL; 582 struct vattr vap; 583 struct hsnode *hp; 584 int error; 585 struct timeval tv; 586 int fsid; 587 int use_rrip; 588 int use_vers2; 589 int use_joliet; 590 int has_rrip = 0; 591 int has_vers2 = 0; 592 int has_joliet = 0; 593 int force_rrip_off; 594 int force_vers2_off; 595 int force_joliet_off; 596 size_t pathbufsz = strlen(path) + 1; 597 int redo_rootvp; 598 599 struct hs_volume *svp = NULL; /* Supplemental VD for ISO-9660:1999 */ 600 struct hs_volume *jvp = NULL; /* Joliet VD */ 601 602 /* 603 * The rules for which extension will be used are: 604 * 1. No specific mount options given: 605 * - use rrip if available 606 * - use ISO9660:1999 if available 607 * - use joliet if available. 608 * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: 609 * - use next "lower" extension 610 * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: 611 * - disable rrip support even if available 612 * - disable IOS9660:1999 support even if available 613 * 614 * We need to adjust these flags as we discover the extensions 615 * present. See below. These are just the starting values. 616 */ 617 use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; 618 use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; 619 use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; 620 621 /* 622 * Open the device 623 */ 624 devvp = makespecvp(dev, VBLK); 625 ASSERT(devvp != 0); 626 627 /* 628 * Open the target device (file) for read only. 629 */ 630 if (error = VOP_OPEN(&devvp, FREAD, cr, NULL)) { 631 VN_RELE(devvp); 632 return (error); 633 } 634 635 /* 636 * Refuse to go any further if this 637 * device is being used for swapping 638 */ 639 if (IS_SWAPVP(common_specvp(devvp))) { 640 error = EBUSY; 641 goto cleanup; 642 } 643 644 vap.va_mask = AT_SIZE; 645 if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr, NULL)) != 0) { 646 cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); 647 goto cleanup; 648 } 649 650 /* 651 * Make sure we have a nonzero size partition. 652 * The current version of the SD driver will *not* fail the open 653 * of such a partition so we have to check for it here. 654 */ 655 if (vap.va_size == 0) { 656 error = ENXIO; 657 goto cleanup; 658 } 659 660 /* 661 * Init a new hsfs structure. 662 */ 663 fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); 664 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); 665 jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); 666 667 /* hardwire perms, uid, gid */ 668 fsp->hsfs_vol.vol_uid = hsfs_default_uid; 669 fsp->hsfs_vol.vol_gid = hsfs_default_gid; 670 fsp->hsfs_vol.vol_prot = hsfs_default_mode; 671 svp->vol_uid = hsfs_default_uid; 672 svp->vol_gid = hsfs_default_gid; 673 svp->vol_prot = hsfs_default_mode; 674 jvp->vol_uid = hsfs_default_uid; 675 jvp->vol_gid = hsfs_default_gid; 676 jvp->vol_prot = hsfs_default_mode; 677 678 /* 679 * Look for a Standard File Structure Volume Descriptor, 680 * of which there must be at least one. 681 * If found, check for volume size consistency. 682 * 683 * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD 684 * If jvp->lbn_size is != 0, we did find a Joliet SVD. 685 */ 686 fsp->hsfs_namemax = ISO_FILE_NAMELEN; 687 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 688 error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); 689 if (error == EINVAL) /* no iso 9660 - try high sierra ... */ 690 error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); 691 692 if (error) 693 goto cleanup; 694 695 DTRACE_PROBE4(findvol, 696 struct hsfs *, fsp, 697 struct hs_volume *, &fsp->hsfs_vol, 698 struct hs_volume *, svp, 699 struct hs_volume *, jvp); 700 701 /* 702 * Generate a file system ID from the CD-ROM, 703 * and check it for uniqueness. 704 * 705 * What we are aiming for is some chance of integrity 706 * across disk change. That is, if a client has an fhandle, 707 * it will be valid as long as the same disk is mounted. 708 */ 709 fsid = compute_cdrom_id(fsp, devvp); 710 711 mutex_enter(&hs_mounttab_lock); 712 713 if (fsid == 0 || fsid == -1) { 714 uniqtime(&tv); 715 fsid = tv.tv_sec; 716 } else /* make sure that the fsid is unique */ 717 for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { 718 if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { 719 uniqtime(&tv); 720 fsid = tv.tv_sec; 721 break; 722 } 723 } 724 725 fsp->hsfs_next = hs_mounttab; 726 hs_mounttab = fsp; 727 728 fsp->hsfs_devvp = devvp; 729 fsp->hsfs_vfs = vfsp; 730 fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); 731 (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); 732 733 mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); 734 rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); 735 736 vfsp->vfs_data = (caddr_t)fsp; 737 vfsp->vfs_dev = dev; 738 vfsp->vfs_fstype = hsfsfstype; 739 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ 740 vfsp->vfs_fsid.val[0] = fsid; 741 vfsp->vfs_fsid.val[1] = hsfsfstype; 742 743 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 744 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 745 error = EINVAL; 746 goto cleanup; 747 } 748 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 749 750 /* 751 * Attempt to discover a RR extension. 752 */ 753 if (use_rrip) { 754 hp = VTOH(fsp->hsfs_rootvp); 755 hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); 756 } 757 758 has_rrip = IS_RRIP_IMPLEMENTED(fsp); 759 has_vers2 = (svp->lbn_size != 0); 760 has_joliet = (jvp->lbn_size != 0); 761 762 DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, 763 int, use_rrip, int, use_vers2, int, use_joliet); 764 765 DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, 766 int, has_rrip, int, has_vers2, int, has_joliet); 767 768 DTRACE_PROBE4(findvol, 769 struct hsfs *, fsp, 770 struct hs_volume *, &fsp->hsfs_vol, 771 struct hs_volume *, svp, 772 struct hs_volume *, jvp); 773 774 force_rrip_off = !use_rrip || 775 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || 776 (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); 777 778 force_vers2_off = !use_vers2 || 779 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); 780 781 force_joliet_off = !use_joliet; 782 783 DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, 784 int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); 785 786 /* 787 * At the moment, we have references of all three possible 788 * extensions (RR, ISO9660:1999/v2 and Joliet) if present. 789 * 790 * The "active" volume descriptor is RRIP (or ISO9660:1988). 791 * We now switch to the user-requested one. 792 */ 793 redo_rootvp = 0; 794 795 if (force_rrip_off || !has_rrip) { 796 if (has_vers2 && !force_vers2_off) { 797 VN_RELE(fsp->hsfs_rootvp); 798 bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 799 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; 800 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 801 redo_rootvp = 1; 802 has_joliet = 0; 803 } else if (has_joliet && !force_joliet_off) { 804 VN_RELE(fsp->hsfs_rootvp); 805 bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 806 fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; 807 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 808 redo_rootvp = 1; 809 has_vers2 = 0; 810 } 811 } 812 813 if (redo_rootvp) { 814 /* 815 * Make sure not to use Rock Ridge. 816 */ 817 UNSET_IMPL_BIT(fsp, RRIP_BIT); 818 UNSET_SUSP_BIT(fsp); 819 has_rrip = 0; 820 821 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 822 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 823 error = EINVAL; 824 goto cleanup; 825 } 826 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 827 } 828 if (IS_RRIP_IMPLEMENTED(fsp)) { 829 has_vers2 = 0; 830 has_joliet = 0; 831 } 832 if (force_vers2_off) 833 has_vers2 = 0; 834 if (force_joliet_off) 835 has_joliet = 0; 836 DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, 837 int, has_rrip, int, has_vers2, int, has_joliet); 838 839 /* 840 * mark root node as VROOT 841 */ 842 fsp->hsfs_rootvp->v_flag |= VROOT; 843 844 /* Here we take care of some special case stuff for mountroot */ 845 if (isroot) { 846 fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; 847 rootvp = fsp->hsfs_rootvp; 848 } 849 850 if (IS_RRIP_IMPLEMENTED(fsp)) { 851 /* 852 * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 853 */ 854 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 855 856 fsp->hsfs_namemax = RRIP_FILE_NAMELEN; 857 fsp->hsfs_namelen = RRIP_FILE_NAMELEN; 858 859 ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); 860 vfs_clearmntopt(vfsp, HOPT_VERS2); 861 vfs_clearmntopt(vfsp, HOPT_JOLIET); 862 863 } else switch (fsp->hsfs_vol_type) { 864 865 case HS_VOL_TYPE_HS: 866 case HS_VOL_TYPE_ISO: 867 default: 868 /* 869 * if iso v1, don't allow trailing spaces in iso file names 870 */ 871 mount_flags |= HSFSMNT_NOTRAILSPACE; 872 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 873 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 874 vfs_clearmntopt(vfsp, HOPT_RR); 875 vfs_clearmntopt(vfsp, HOPT_VERS2); 876 vfs_clearmntopt(vfsp, HOPT_JOLIET); 877 break; 878 879 case HS_VOL_TYPE_ISO_V2: 880 /* 881 * if iso v2, don't copy NOTRAILDOT to hsfs_flags 882 */ 883 mount_flags &= ~HSFSMNT_NOTRAILDOT; 884 mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; 885 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 886 fsp->hsfs_namelen = ISO_NAMELEN_V2; 887 vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); 888 vfs_clearmntopt(vfsp, HOPT_RR); 889 vfs_clearmntopt(vfsp, HOPT_JOLIET); 890 break; 891 892 case HS_VOL_TYPE_JOLIET: 893 /* 894 * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 895 */ 896 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 897 mount_flags |= HSFSMNT_NOMAPLCASE; 898 if (mount_flags & HSFSMNT_JOLIETLONG) 899 fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ 900 else 901 fsp->hsfs_namemax = MAXNAMELEN-1; 902 fsp->hsfs_namelen = JOLIET_NAMELEN*2; 903 vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); 904 vfs_clearmntopt(vfsp, HOPT_RR); 905 vfs_clearmntopt(vfsp, HOPT_VERS2); 906 break; 907 } 908 909 /* 910 * Add the HSFSMNT_INODE pseudo mount flag to the current mount flags. 911 */ 912 fsp->hsfs_flags = mount_flags | (fsp->hsfs_flags & HSFSMNT_INODE); 913 914 /* 915 * Setup I/O Scheduling structures 916 */ 917 if (do_schedio) { 918 fsp->hqueue = kmem_alloc(sizeof (struct hsfs_queue), KM_SLEEP); 919 hsched_init(fsp, fsid, &modlinkage); 920 } 921 922 /* 923 * Setup kstats 924 */ 925 hsfs_init_kstats(fsp, fsid); 926 927 DTRACE_PROBE1(mount__done, struct hsfs *, fsp); 928 929 /* 930 * set the magic word 931 */ 932 fsp->hsfs_magic = HSFS_MAGIC; 933 mutex_exit(&hs_mounttab_lock); 934 935 kmem_free(svp, sizeof (*svp)); 936 kmem_free(jvp, sizeof (*jvp)); 937 938 return (0); 939 940 cleanup: 941 (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr, NULL); 942 VN_RELE(devvp); 943 if (fsp) 944 kmem_free(fsp, sizeof (*fsp)); 945 if (svp) 946 kmem_free(svp, sizeof (*svp)); 947 if (jvp) 948 kmem_free(jvp, sizeof (*jvp)); 949 return (error); 950 } 951 952 /* 953 * Get the rootvp associated with fsp->hsfs_vol 954 */ 955 static int 956 hs_getrootvp( 957 struct vfs *vfsp, 958 struct hsfs *fsp, 959 size_t pathsize) 960 { 961 struct hsnode *hp; 962 963 ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); 964 965 /* 966 * If the root directory does not appear to be 967 * valid, use what it points to as "." instead. 968 * Some Defense Mapping Agency disks are non-conformant 969 * in this way. 970 */ 971 if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { 972 hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); 973 if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, 974 (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { 975 hs_mounttab = hs_mounttab->hsfs_next; 976 mutex_destroy(&fsp->hsfs_free_lock); 977 rw_destroy(&fsp->hsfs_hash_lock); 978 kmem_free(fsp->hsfs_fsmnt, pathsize); 979 mutex_exit(&hs_mounttab_lock); 980 return (0); 981 } 982 } else { 983 fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, 984 fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); 985 } 986 987 /* XXX - ignore the path table for now */ 988 fsp->hsfs_ptbl = NULL; 989 hp = VTOH(fsp->hsfs_rootvp); 990 hp->hs_ptbl_idx = NULL; 991 992 return (1); 993 } 994 995 /* 996 * hs_findhsvol() 997 * 998 * Locate the Standard File Structure Volume Descriptor and 999 * parse it into an hs_volume structure. 1000 * 1001 * XXX - May someday want to look for Coded Character Set FSVD, too. 1002 */ 1003 static int 1004 hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) 1005 { 1006 struct buf *secbp; 1007 int i; 1008 int n; 1009 uchar_t *volp; 1010 int error; 1011 uint_t secno; 1012 1013 secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); 1014 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1015 error = geterror(secbp); 1016 1017 if (error != 0) { 1018 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); 1019 brelse(secbp); 1020 return (error); 1021 } 1022 1023 volp = (uchar_t *)secbp->b_un.b_addr; 1024 1025 /* 1026 * To avoid that we read the whole medium in case that someone prepares 1027 * a malicious "fs image", we read at most 32 blocks. 1028 */ 1029 for (n = 0; n < 32 && 1030 HSV_DESC_TYPE(volp) != VD_EOV; n++) { 1031 for (i = 0; i < HSV_ID_STRLEN; i++) 1032 if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) 1033 goto cantfind; 1034 if (HSV_STD_VER(volp) != HSV_ID_VER) 1035 goto cantfind; 1036 switch (HSV_DESC_TYPE(volp)) { 1037 case VD_SFS: 1038 /* Standard File Structure */ 1039 fsp->hsfs_vol_type = HS_VOL_TYPE_HS; 1040 error = hs_parsehsvol(fsp, volp, hvp); 1041 brelse(secbp); 1042 return (error); 1043 1044 case VD_CCFS: 1045 /* Coded Character File Structure */ 1046 case VD_BOOT: 1047 case VD_UNSPEC: 1048 case VD_EOV: 1049 break; 1050 } 1051 brelse(secbp); 1052 ++secno; 1053 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1054 1055 error = geterror(secbp); 1056 1057 if (error != 0) { 1058 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", 1059 error); 1060 brelse(secbp); 1061 return (error); 1062 } 1063 1064 volp = (uchar_t *)secbp->b_un.b_addr; 1065 } 1066 cantfind: 1067 brelse(secbp); 1068 return (EINVAL); 1069 } 1070 1071 /* 1072 * hs_parsehsvol 1073 * 1074 * Parse the Standard File Structure Volume Descriptor into 1075 * an hs_volume structure. We can't just bcopy it into the 1076 * structure because of byte-ordering problems. 1077 * 1078 */ 1079 static int 1080 hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1081 { 1082 hvp->vol_size = HSV_VOL_SIZE(volp); 1083 hvp->lbn_size = HSV_BLK_SIZE(volp); 1084 if (hvp->lbn_size == 0) { 1085 cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " 1086 "SFSVD is zero"); 1087 return (EINVAL); 1088 } 1089 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1090 hvp->lbn_secshift = 1091 ffs((long)howmany(HS_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; 1092 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1093 hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); 1094 hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); 1095 hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); 1096 hvp->ptbl_len = HSV_PTBL_SIZE(volp); 1097 hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); 1098 hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); 1099 #if defined(_LITTLE_ENDIAN) 1100 hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); 1101 #else 1102 hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); 1103 #endif 1104 hs_copylabel(hvp, HSV_VOL_ID(volp), 0); 1105 1106 /* 1107 * Make sure that lbn_size is a power of two and otherwise valid. 1108 */ 1109 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1110 cmn_err(CE_NOTE, 1111 "hsfs: %d-byte logical block size not supported", 1112 hvp->lbn_size); 1113 return (EINVAL); 1114 } 1115 return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, 1116 (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); 1117 } 1118 1119 /* 1120 * hs_findisovol() 1121 * 1122 * Locate the Primary Volume Descriptor 1123 * parse it into an hs_volume structure. 1124 * 1125 * XXX - Partition not yet done 1126 * 1127 * Except for fsp->hsfs_vol_type, no fsp member may be modified. 1128 * fsp->hsfs_vol is modified indirectly via the *hvp argument. 1129 */ 1130 static int 1131 hs_findisovol(struct hsfs *fsp, struct vnode *vp, 1132 struct hs_volume *hvp, 1133 struct hs_volume *svp, 1134 struct hs_volume *jvp) 1135 { 1136 struct buf *secbp; 1137 int i; 1138 int n; 1139 uchar_t *volp; 1140 int error; 1141 uint_t secno; 1142 int foundpvd = 0; 1143 int foundsvd = 0; 1144 int foundjvd = 0; 1145 int pvd_sum = 0; 1146 1147 secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); 1148 secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); 1149 error = geterror(secbp); 1150 1151 if (error != 0) { 1152 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); 1153 brelse(secbp); 1154 return (error); 1155 } 1156 1157 volp = (uchar_t *)secbp->b_un.b_addr; 1158 1159 /* 1160 * To avoid that we read the whole medium in case that someone prepares 1161 * a malicious "fs image", we read at most 32 blocks. 1162 */ 1163 for (n = 0; n < 32 && 1164 (enum iso_voldesc_type) ISO_DESC_TYPE(volp) != ISO_VD_EOV; n++) { 1165 for (i = 0; i < ISO_ID_STRLEN; i++) 1166 if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) 1167 goto cantfind; 1168 switch (ISO_DESC_TYPE(volp)) { 1169 case ISO_VD_PVD: 1170 /* Standard File Structure */ 1171 if (ISO_STD_VER(volp) != ISO_ID_VER) 1172 goto cantfind; 1173 if (foundpvd != 1) { 1174 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1175 if (error = hs_parseisovol(fsp, volp, hvp)) { 1176 brelse(secbp); 1177 return (error); 1178 } 1179 foundpvd = 1; 1180 for (i = 0; i < ISO_SECTOR_SIZE; i++) 1181 pvd_sum += volp[i]; 1182 } 1183 break; 1184 case ISO_VD_SVD: 1185 /* Supplementary Volume Descriptor */ 1186 if (ISO_STD_VER(volp) == ISO_ID_VER2 && 1187 foundsvd != 1) { 1188 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1189 if (error = hs_parseisovol(fsp, volp, svp)) { 1190 brelse(secbp); 1191 return (error); 1192 } 1193 foundsvd = 1; 1194 } 1195 if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { 1196 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1197 if (error = hs_parseisovol(fsp, volp, jvp)) { 1198 brelse(secbp); 1199 return (error); 1200 } 1201 foundjvd = 1; 1202 } 1203 break; 1204 case ISO_VD_BOOT: 1205 break; 1206 case ISO_VD_VPD: 1207 /* currently cannot handle partition */ 1208 break; 1209 case VD_EOV: 1210 break; 1211 } 1212 brelse(secbp); 1213 ++secno; 1214 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1215 error = geterror(secbp); 1216 1217 if (error != 0) { 1218 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1219 error); 1220 brelse(secbp); 1221 return (error); 1222 } 1223 1224 volp = (uchar_t *)secbp->b_un.b_addr; 1225 } 1226 for (n = 0; n < 16; n++) { 1227 brelse(secbp); 1228 ++secno; 1229 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1230 error = geterror(secbp); 1231 1232 if (error != 0) { 1233 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1234 error); 1235 brelse(secbp); 1236 return (error); 1237 } 1238 1239 /* 1240 * Check for the signature from mkisofs that grants that 1241 * the current filesystem allows to use the extent lbn as 1242 * inode number even in pure ISO9660 mode. 1243 */ 1244 volp = (uchar_t *)secbp->b_un.b_addr; 1245 if (strncmp((char *)volp, "MKI ", 4) == 0) { 1246 int sum; 1247 1248 sum = volp[2045]; 1249 sum *= 256; 1250 sum += volp[2046]; 1251 sum *= 256; 1252 sum += volp[2047]; 1253 if (sum == pvd_sum) 1254 fsp->hsfs_flags |= HSFSMNT_INODE; 1255 break; 1256 } 1257 } 1258 if (foundpvd) { 1259 brelse(secbp); 1260 return (0); 1261 } 1262 cantfind: 1263 brelse(secbp); 1264 return (EINVAL); 1265 } 1266 1267 /* 1268 * Return 0 if no Joliet is found 1269 * else return Joliet Level 1..3 1270 */ 1271 static int 1272 hs_joliet_level(uchar_t *volp) 1273 { 1274 if (ISO_std_ver(volp)[0] == ISO_ID_VER && 1275 ISO_svd_esc(volp)[0] == '%' && 1276 ISO_svd_esc(volp)[1] == '/') { 1277 1278 switch (ISO_svd_esc(volp)[2]) { 1279 1280 case '@': 1281 return (1); 1282 case 'C': 1283 return (2); 1284 case 'E': 1285 return (3); 1286 } 1287 } 1288 return (0); 1289 } 1290 1291 /* 1292 * hs_parseisovol 1293 * 1294 * Parse the Primary Volume Descriptor into an hs_volume structure. 1295 * 1296 */ 1297 static int 1298 hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1299 { 1300 hvp->vol_size = ISO_VOL_SIZE(volp); 1301 hvp->lbn_size = ISO_BLK_SIZE(volp); 1302 if (hvp->lbn_size == 0) { 1303 cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " 1304 "PVD is zero"); 1305 return (EINVAL); 1306 } 1307 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1308 hvp->lbn_secshift = 1309 ffs((long)howmany(ISO_SECTOR_SIZE, (int)hvp->lbn_size)) - 1; 1310 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1311 hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); 1312 hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); 1313 hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); 1314 hvp->ptbl_len = ISO_PTBL_SIZE(volp); 1315 hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); 1316 hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); 1317 #if defined(_LITTLE_ENDIAN) 1318 hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); 1319 #else 1320 hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); 1321 #endif 1322 hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); 1323 1324 /* 1325 * Make sure that lbn_size is a power of two and otherwise valid. 1326 */ 1327 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1328 cmn_err(CE_NOTE, 1329 "hsfs: %d-byte logical block size not supported", 1330 hvp->lbn_size); 1331 return (EINVAL); 1332 } 1333 return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, 1334 (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); 1335 } 1336 1337 /* 1338 * Common code for mount and umount. 1339 * Check that the user's argument is a reasonable 1340 * thing on which to mount, and return the device number if so. 1341 */ 1342 static int 1343 hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, 1344 cred_t *cr) 1345 { 1346 int error; 1347 struct vnode *svp = NULL; 1348 struct vnode *lvp = NULL; 1349 struct vnode *bvp; 1350 struct vattr vap; 1351 dev_t dev; 1352 enum uio_seg fromspace = (flags & MS_SYSSPACE) ? 1353 UIO_SYSSPACE : UIO_USERSPACE; 1354 1355 /* 1356 * Look up the device/file to be mounted. 1357 */ 1358 error = lookupname(fspec, fromspace, FOLLOW, NULLVPP, &svp); 1359 if (error) { 1360 if (error == ENOENT) 1361 error = ENODEV; 1362 goto out; 1363 } 1364 1365 error = vfs_get_lofi(vfsp, &lvp); 1366 1367 if (error > 0) { 1368 if (error == ENOENT) 1369 error = ENODEV; 1370 goto out; 1371 } else if (error == 0) { 1372 bvp = lvp; 1373 } else { 1374 bvp = svp; 1375 1376 if (bvp->v_type != VBLK) { 1377 error = ENOTBLK; 1378 goto out; 1379 } 1380 1381 if ((error = secpolicy_spec_open(cr, bvp, FREAD)) != 0) 1382 goto out; 1383 } 1384 1385 /* 1386 * Can we read from the device/file ? 1387 */ 1388 if ((error = VOP_ACCESS(svp, VREAD, 0, cr, NULL)) != 0) 1389 goto out; 1390 1391 vap.va_mask = AT_MODE; /* get protection mode */ 1392 (void) VOP_GETATTR(bvp, &vap, 0, CRED(), NULL); 1393 *mode = vap.va_mode; 1394 1395 dev = *pdev = bvp->v_rdev; 1396 1397 error = EBUSY; 1398 1399 /* 1400 * Ensure that this device isn't already mounted, 1401 * unless this is a REMOUNT request or we are told to suppress 1402 * mount checks. 1403 */ 1404 if ((flags & MS_NOCHECK) == 0) { 1405 if (vfs_devmounting(dev, vfsp)) 1406 goto out; 1407 if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) 1408 goto out; 1409 } 1410 1411 if (getmajor(*pdev) >= devcnt) { 1412 error = ENXIO; 1413 goto out; 1414 } 1415 1416 error = 0; 1417 out: 1418 if (svp != NULL) 1419 VN_RELE(svp); 1420 if (lvp != NULL) 1421 VN_RELE(lvp); 1422 return (error); 1423 } 1424 1425 static void 1426 hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) 1427 { 1428 char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ 1429 1430 if (isjoliet) { 1431 /* 1432 * hs_joliet_cp() will output 16..48 bytes. 1433 * We need to clear 'lbuf' to avoid junk chars past byte 15. 1434 */ 1435 bzero(lbuf, sizeof (lbuf)); 1436 (void) hs_joliet_cp((char *)label, lbuf, 32); 1437 label = (unsigned char *)lbuf; 1438 } 1439 /* cdrom volid is at most 32 bytes */ 1440 bcopy(label, hvp->vol_id, 32); 1441 hvp->vol_id[31] = NULL; 1442 } 1443 1444 /* 1445 * Mount root file system. 1446 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to 1447 * remount the root file system, and ROOT_UNMOUNT if called to 1448 * unmount the root (e.g., as part of a system shutdown). 1449 * 1450 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP 1451 * operation, goes along with auto-configuration. A mechanism should be 1452 * provided by which machine-INdependent code in the kernel can say "get me the 1453 * right root file system" and "get me the right initial swap area", and have 1454 * that done in what may well be a machine-dependent fashion. 1455 * Unfortunately, it is also file-system-type dependent (NFS gets it via 1456 * bootparams calls, UFS gets it from various and sundry machine-dependent 1457 * mechanisms, as SPECFS does for swap). 1458 */ 1459 static int 1460 hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) 1461 { 1462 int error; 1463 struct hsfs *fsp; 1464 struct hs_volume *fvolp; 1465 static int hsfsrootdone = 0; 1466 dev_t rootdev; 1467 mode_t mode = 0; 1468 1469 if (why == ROOT_INIT) { 1470 if (hsfsrootdone++) 1471 return (EBUSY); 1472 rootdev = getrootdev(); 1473 if (rootdev == (dev_t)NODEV) 1474 return (ENODEV); 1475 vfsp->vfs_dev = rootdev; 1476 vfsp->vfs_flag |= VFS_RDONLY; 1477 } else if (why == ROOT_REMOUNT) { 1478 cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); 1479 return (0); 1480 } else if (why == ROOT_UNMOUNT) { 1481 return (0); 1482 } 1483 error = vfs_lock(vfsp); 1484 if (error) { 1485 cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); 1486 return (error); 1487 } 1488 1489 error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); 1490 /* 1491 * XXX - assumes root device is not indirect, because we don't set 1492 * rootvp. Is rootvp used for anything? If so, make another arg 1493 * to mountfs. 1494 */ 1495 if (error) { 1496 vfs_unlock(vfsp); 1497 if (rootvp) { 1498 VN_RELE(rootvp); 1499 rootvp = (struct vnode *)0; 1500 } 1501 return (error); 1502 } 1503 if (why == ROOT_INIT) 1504 vfs_add((struct vnode *)0, vfsp, 1505 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1506 vfs_unlock(vfsp); 1507 fsp = VFS_TO_HSFS(vfsp); 1508 fvolp = &fsp->hsfs_vol; 1509 #ifdef HSFS_CLKSET 1510 if (fvolp->cre_date.tv_sec == 0) { 1511 cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); 1512 if (fvolp->mod_date.tv_sec == 0) { 1513 cmn_err(CE_NOTE, 1514 "hsfs_mountroot: mod_date.tv_sec == 0"); 1515 cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); 1516 clkset(-1L); 1517 } else { 1518 clkset(fvolp->mod_date.tv_sec); 1519 } 1520 } else { 1521 clkset(fvolp->mod_date.tv_sec); 1522 } 1523 #else /* HSFS_CLKSET */ 1524 clkset(-1L); 1525 #endif /* HSFS_CLKSET */ 1526 return (0); 1527 } 1528 1529 /* 1530 * hs_findvoldesc() 1531 * 1532 * Return the sector where the volume descriptor lives. This is 1533 * a fixed value for "normal" cd-rom's, but can change for 1534 * multisession cd's. 1535 * 1536 * desc_sec is the same for high-sierra and iso 9660 formats, why 1537 * there are two different #defines used in the code for this is 1538 * beyond me. These are standards, cast in concrete, right? 1539 * To be general, however, this function supports passing in different 1540 * values. 1541 */ 1542 static int 1543 hs_findvoldesc(dev_t rdev, int desc_sec) 1544 { 1545 int secno; 1546 int error; 1547 int rval; /* ignored */ 1548 1549 #ifdef CDROMREADOFFSET 1550 /* 1551 * Issue the Read Offset ioctl directly to the 1552 * device. Ignore any errors and set starting 1553 * secno to the default, otherwise add the 1554 * VOLDESC sector number to the offset. 1555 */ 1556 error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, 1557 FNATIVE|FKIOCTL|FREAD, CRED(), &rval); 1558 if (error) { 1559 secno = desc_sec; 1560 } else { 1561 secno += desc_sec; 1562 } 1563 #else 1564 secno = desc_sec; 1565 #endif 1566 1567 return (secno); 1568 } 1569
Indexes created Sat Nov 28 01:19:25 UTC 2009
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