hsfs_vfsops.c revision 4280:293a83bcb332
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 103static char *global_cancel[] = { HOPT_NOGLOBAL, NULL }; 104static char *noglobal_cancel[] = { HOPT_GLOBAL, NULL }; 105static char *mapl_cancel[] = { HOPT_NOMAPLCASE, NULL }; 106static char *nomapl_cancel[] = { HOPT_MAPLCASE, NULL }; 107static char *ro_cancel[] = { MNTOPT_RW, NULL }; 108static char *rr_cancel[] = { HOPT_NRR, NULL }; 109static char *nrr_cancel[] = { HOPT_RR, NULL }; 110static char *joliet_cancel[] = { HOPT_NOJOLIET, NULL }; 111static char *nojoliet_cancel[] = { HOPT_JOLIET, NULL }; 112static char *vers2_cancel[] = { HOPT_NOVERS2, NULL }; 113static char *novers2_cancel[] = { HOPT_VERS2, NULL }; 114static char *trail_cancel[] = { HOPT_NOTRAILDOT, NULL }; 115static char *notrail_cancel[] = { HOPT_TRAILDOT, NULL }; 116 117static 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 135static mntopts_t hsfs_proto_opttbl = { 136 sizeof (hsfs_options) / sizeof (mntopt_t), 137 hsfs_options 138}; 139 140static int hsfsfstype; 141static int hsfsinit(int, char *); 142 143static 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 151static struct modlfs modlfs = { 152 &mod_fsops, "filesystem for HSFS", &vfw 153}; 154 155static struct modlinkage modlinkage = { 156 MODREV_1, (void *)&modlfs, NULL 157}; 158 159char _depends_on[] = "fs/specfs"; 160 161int 162_init(void) 163{ 164 return (mod_install(&modlinkage)); 165} 166 167int 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 191int 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 199kmutex_t hs_mounttab_lock; 200struct hsfs *hs_mounttab = NULL; 201 202/* default mode, uid, gid */ 203mode_t hsfs_default_mode = 0555; 204uid_t hsfs_default_uid = 0; 205gid_t hsfs_default_gid = 3; 206 207static int hsfs_mount(struct vfs *vfsp, struct vnode *mvp, 208 struct mounta *uap, struct cred *cr); 209static int hsfs_unmount(struct vfs *vfsp, int, struct cred *cr); 210static int hsfs_root(struct vfs *vfsp, struct vnode **vpp); 211static int hsfs_statvfs(struct vfs *vfsp, struct statvfs64 *sbp); 212static int hsfs_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp); 213static int hsfs_mountroot(struct vfs *, enum whymountroot); 214 215static int hs_mountfs(struct vfs *vfsp, dev_t dev, char *path, 216 mode_t mode, int flags, struct cred *cr, int isroot); 217static int hs_getrootvp(struct vfs *vfsp, struct hsfs *fsp, size_t pathsize); 218static int hs_findhsvol(struct hsfs *fsp, struct vnode *vp, 219 struct hs_volume *hvp); 220static int hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, 221 struct hs_volume *hvp); 222static int hs_findisovol(struct hsfs *fsp, struct vnode *vp, 223 struct hs_volume *hvp, 224 struct hs_volume *svp, 225 struct hs_volume *jvp); 226static int hs_joliet_level(uchar_t *volp); 227static int hs_parseisovol(struct hsfs *fsp, uchar_t *volp, 228 struct hs_volume *hvp); 229static void hs_copylabel(struct hs_volume *, unsigned char *, int); 230static int hs_getmdev(struct vfs *, char *fspec, int flags, dev_t *pdev, 231 mode_t *mode, cred_t *cr); 232static int hs_findvoldesc(dev_t rdev, int desc_sec); 233 234static int 235hsfsinit(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*/ 268static int 269hsfs_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*/ 348static int 349hsfs_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*/ 414static int 415hsfs_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*/ 423static int 424hsfs_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 461static int 462hsfs_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 = fid->hf_ino; 480 481 if ((*vpp = hs_findhash(nodeid, fid->hf_dir_lbn, 482 (uint_t)fid->hf_dir_off, vfsp)) == NULL) { 483 /* 484 * Not in cache, so we need to remake it. 485 * hs_remakenode() will read the directory entry 486 * and then check again to see if anyone else has 487 * put it in the cache. 488 */ 489 rw_exit(&fsp->hsfs_hash_lock); 490 error = hs_remakenode(fid->hf_dir_lbn, (uint_t)fid->hf_dir_off, 491 vfsp, vpp); 492 return (error); 493 } 494 rw_exit(&fsp->hsfs_hash_lock); 495 return (0); 496} 497 498 499#define CHECKSUM_SIZE (64 * 1024) 500 501/* 502 * Compute a CD-ROM fsid by checksumming the first 64K of data on the CD 503 * We use the 'fsp' argument to determine the location of the root 504 * directory entry, and we start reading from there. 505 */ 506static int 507compute_cdrom_id(struct hsfs *fsp, vnode_t *devvp) 508{ 509 uint_t secno; 510 struct hs_volume *hsvp = &fsp->hsfs_vol; 511 struct buf *bp; 512 int error; 513 int fsid; 514 515 secno = hsvp->root_dir.ext_lbn >> hsvp->lbn_secshift; 516 bp = bread(devvp->v_rdev, secno * 4, CHECKSUM_SIZE); 517 error = geterror(bp); 518 519 /* 520 * An error on read or a partial read means we asked 521 * for a nonexistant/corrupted piece of the device 522 * (including past-the-end of the media). Don't 523 * try to use the checksumming method then. 524 */ 525 if (!error && bp->b_bcount == CHECKSUM_SIZE) { 526 int *ibuf = (int *)bp->b_un.b_addr; 527 int i; 528 529 fsid = 0; 530 531 for (i = 0; i < CHECKSUM_SIZE / sizeof (int); i++) 532 fsid ^= ibuf[ i ]; 533 } else { 534 /* 535 * Fallback - use creation date 536 */ 537 fsid = hsvp->cre_date.tv_sec; 538 } 539 540 brelse(bp); 541 542 return (fsid); 543} 544 545 546/*ARGSUSED*/ 547static int 548hs_mountfs( 549 struct vfs *vfsp, 550 dev_t dev, 551 char *path, 552 mode_t mode, 553 int mount_flags, 554 struct cred *cr, 555 int isroot) 556{ 557 struct vnode *devvp; 558 struct hsfs *tsp; 559 struct hsfs *fsp = NULL; 560 struct vattr vap; 561 struct hsnode *hp; 562 int error; 563 struct timeval tv; 564 int fsid; 565 int use_rrip; 566 int use_vers2; 567 int use_joliet; 568 int has_rrip = 0; 569 int has_vers2 = 0; 570 int has_joliet = 0; 571 int force_rrip_off; 572 int force_vers2_off; 573 int force_joliet_off; 574 size_t pathbufsz = strlen(path) + 1; 575 int redo_rootvp; 576 577 struct hs_volume *svp; /* Supplemental VD for ISO-9660:1999 */ 578 struct hs_volume *jvp; /* Joliet VD */ 579 580 /* 581 * The rules for which extension will be used are: 582 * 1. No specific mount options given: 583 * - use rrip if available 584 * - use ISO9660:1999 if available 585 * - use joliet if available. 586 * 2. rrip/ISO9660:1999/joliet explicitly disabled via mount option: 587 * - use next "lower" extension 588 * 3. joliet/ISO9660:1999/rrip explicitly requested via mount option: 589 * - disable rrip support even if available 590 * - disable IOS9660:1999 support even if available 591 * 592 * We need to adjust these flags as we discover the extensions 593 * present. See below. These are just the starting values. 594 */ 595 use_rrip = (mount_flags & HSFSMNT_NORRIP) == 0; 596 use_vers2 = (mount_flags & HSFSMNT_NOVERS2) == 0; 597 use_joliet = (mount_flags & HSFSMNT_NOJOLIET) == 0; 598 599 /* 600 * Open the device 601 */ 602 devvp = makespecvp(dev, VBLK); 603 ASSERT(devvp != 0); 604 605 /* 606 * Open the target device (file) for read only. 607 */ 608 if (error = VOP_OPEN(&devvp, FREAD, cr)) { 609 VN_RELE(devvp); 610 return (error); 611 } 612 613 /* 614 * Refuse to go any further if this 615 * device is being used for swapping 616 */ 617 if (IS_SWAPVP(common_specvp(devvp))) { 618 error = EBUSY; 619 goto cleanup; 620 } 621 622 vap.va_mask = AT_SIZE; 623 if ((error = VOP_GETATTR(devvp, &vap, ATTR_COMM, cr)) != 0) { 624 cmn_err(CE_NOTE, "Cannot get attributes of the CD-ROM driver"); 625 goto cleanup; 626 } 627 628 /* 629 * Make sure we have a nonzero size partition. 630 * The current version of the SD driver will *not* fail the open 631 * of such a partition so we have to check for it here. 632 */ 633 if (vap.va_size == 0) { 634 error = ENXIO; 635 goto cleanup; 636 } 637 638 /* 639 * Init a new hsfs structure. 640 */ 641 fsp = kmem_zalloc(sizeof (*fsp), KM_SLEEP); 642 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); 643 jvp = kmem_zalloc(sizeof (*jvp), KM_SLEEP); 644 645 /* hardwire perms, uid, gid */ 646 fsp->hsfs_vol.vol_uid = hsfs_default_uid; 647 fsp->hsfs_vol.vol_gid = hsfs_default_gid; 648 fsp->hsfs_vol.vol_prot = hsfs_default_mode; 649 svp->vol_uid = hsfs_default_uid; 650 svp->vol_gid = hsfs_default_gid; 651 svp->vol_prot = hsfs_default_mode; 652 jvp->vol_uid = hsfs_default_uid; 653 jvp->vol_gid = hsfs_default_gid; 654 jvp->vol_prot = hsfs_default_mode; 655 656 /* 657 * Look for a Standard File Structure Volume Descriptor, 658 * of which there must be at least one. 659 * If found, check for volume size consistency. 660 * 661 * If svp->lbn_size is != 0, we did find a ISO-9660:1999 SVD 662 * If jvp->lbn_size is != 0, we did find a Joliet SVD. 663 */ 664 fsp->hsfs_namemax = ISO_FILE_NAMELEN; 665 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 666 error = hs_findisovol(fsp, devvp, &fsp->hsfs_vol, svp, jvp); 667 if (error == EINVAL) /* no iso 9660 - try high sierra ... */ 668 error = hs_findhsvol(fsp, devvp, &fsp->hsfs_vol); 669 670 if (error) 671 goto cleanup; 672 673 DTRACE_PROBE4(findvol, 674 struct hsfs *, fsp, 675 struct hs_volume *, &fsp->hsfs_vol, 676 struct hs_volume *, svp, 677 struct hs_volume *, jvp); 678 679 /* 680 * Generate a file system ID from the CD-ROM, 681 * and check it for uniqueness. 682 * 683 * What we are aiming for is some chance of integrity 684 * across disk change. That is, if a client has an fhandle, 685 * it will be valid as long as the same disk is mounted. 686 */ 687 fsid = compute_cdrom_id(fsp, devvp); 688 689 mutex_enter(&hs_mounttab_lock); 690 691 if (fsid == 0 || fsid == -1) { 692 uniqtime(&tv); 693 fsid = tv.tv_sec; 694 } else /* make sure that the fsid is unique */ 695 for (tsp = hs_mounttab; tsp != NULL; tsp = tsp->hsfs_next) { 696 if (fsid == tsp->hsfs_vfs->vfs_fsid.val[0]) { 697 uniqtime(&tv); 698 fsid = tv.tv_sec; 699 break; 700 } 701 } 702 703 fsp->hsfs_next = hs_mounttab; 704 hs_mounttab = fsp; 705 706 fsp->hsfs_devvp = devvp; 707 fsp->hsfs_vfs = vfsp; 708 fsp->hsfs_fsmnt = kmem_alloc(pathbufsz, KM_SLEEP); 709 (void) strlcpy(fsp->hsfs_fsmnt, path, pathbufsz); 710 711 mutex_init(&fsp->hsfs_free_lock, NULL, MUTEX_DEFAULT, NULL); 712 rw_init(&fsp->hsfs_hash_lock, NULL, RW_DEFAULT, NULL); 713 714 vfsp->vfs_data = (caddr_t)fsp; 715 vfsp->vfs_dev = dev; 716 vfsp->vfs_fstype = hsfsfstype; 717 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; /* %% */ 718 vfsp->vfs_fsid.val[0] = fsid; 719 vfsp->vfs_fsid.val[1] = hsfsfstype; 720 721 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 722 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 723 error = EINVAL; 724 goto cleanup; 725 } 726 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 727 728 /* 729 * Attempt to discover a RR extension. 730 */ 731 if (use_rrip) { 732 hp = VTOH(fsp->hsfs_rootvp); 733 hs_check_root_dirent(fsp->hsfs_rootvp, &(hp->hs_dirent)); 734 } 735 736 has_rrip = IS_RRIP_IMPLEMENTED(fsp); 737 has_vers2 = (svp->lbn_size != 0); 738 has_joliet = (jvp->lbn_size != 0); 739 740 DTRACE_PROBE4(voltype__suggested, struct hsfs *, fsp, 741 int, use_rrip, int, use_vers2, int, use_joliet); 742 743 DTRACE_PROBE4(voltype__actual, struct hsfs *, fsp, 744 int, has_rrip, int, has_vers2, int, has_joliet); 745 746 DTRACE_PROBE4(findvol, 747 struct hsfs *, fsp, 748 struct hs_volume *, &fsp->hsfs_vol, 749 struct hs_volume *, svp, 750 struct hs_volume *, jvp); 751 752 force_rrip_off = !use_rrip || 753 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet) || 754 (vfs_optionisset(vfsp, HOPT_VERS2, NULL) && has_vers2); 755 756 force_vers2_off = !use_vers2 || 757 (vfs_optionisset(vfsp, HOPT_JOLIET, NULL) && has_joliet); 758 759 force_joliet_off = !use_joliet; 760 761 DTRACE_PROBE4(voltype__force_off, struct hsfs *, fsp, 762 int, force_rrip_off, int, force_vers2_off, int, force_joliet_off); 763 764 /* 765 * At the moment, we have references of all three possible 766 * extensions (RR, ISO9660:1999/v2 and Joliet) if present. 767 * 768 * The "active" volume descriptor is RRIP (or ISO9660:1988). 769 * We now switch to the user-requested one. 770 */ 771 redo_rootvp = 0; 772 773 if (force_rrip_off || !has_rrip) { 774 if (has_vers2 && !force_vers2_off) { 775 VN_RELE(fsp->hsfs_rootvp); 776 bcopy(svp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 777 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO_V2; 778 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 779 redo_rootvp = 1; 780 has_joliet = 0; 781 } else if (has_joliet && !force_joliet_off) { 782 VN_RELE(fsp->hsfs_rootvp); 783 bcopy(jvp, &fsp->hsfs_vol, sizeof (struct hs_volume)); 784 fsp->hsfs_vol_type = HS_VOL_TYPE_JOLIET; 785 vfsp->vfs_bsize = fsp->hsfs_vol.lbn_size; 786 redo_rootvp = 1; 787 has_vers2 = 0; 788 } 789 } 790 791 if (redo_rootvp) { 792 /* 793 * Make sure not to use Rock Ridge. 794 */ 795 UNSET_IMPL_BIT(fsp, RRIP_BIT); 796 UNSET_SUSP_BIT(fsp); 797 has_rrip = 0; 798 799 if (!hs_getrootvp(vfsp, fsp, pathbufsz)) { 800 DTRACE_PROBE1(rootvp__failed, struct hsfs *, fsp); 801 error = EINVAL; 802 goto cleanup; 803 } 804 DTRACE_PROBE1(rootvp, struct hsfs *, fsp); 805 } 806 if (IS_RRIP_IMPLEMENTED(fsp)) { 807 has_vers2 = 0; 808 has_joliet = 0; 809 } 810 if (force_vers2_off) 811 has_vers2 = 0; 812 if (force_joliet_off) 813 has_joliet = 0; 814 DTRACE_PROBE4(voltype__taken, struct hsfs *, fsp, 815 int, has_rrip, int, has_vers2, int, has_joliet); 816 817 /* 818 * mark root node as VROOT 819 */ 820 fsp->hsfs_rootvp->v_flag |= VROOT; 821 822 /* Here we take care of some special case stuff for mountroot */ 823 if (isroot) { 824 fsp->hsfs_rootvp->v_rdev = devvp->v_rdev; 825 rootvp = fsp->hsfs_rootvp; 826 } 827 828 if (IS_RRIP_IMPLEMENTED(fsp)) { 829 /* 830 * if RRIP, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 831 */ 832 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 833 834 fsp->hsfs_namemax = RRIP_FILE_NAMELEN; 835 fsp->hsfs_namelen = RRIP_FILE_NAMELEN; 836 837 ASSERT(vfs_optionisset(vfsp, HOPT_RR, NULL)); 838 vfs_clearmntopt(vfsp, HOPT_VERS2); 839 vfs_clearmntopt(vfsp, HOPT_JOLIET); 840 841 } else switch (fsp->hsfs_vol_type) { 842 843 case HS_VOL_TYPE_HS: 844 case HS_VOL_TYPE_ISO: 845 default: 846 /* 847 * if iso v1, don't allow trailing spaces in iso file names 848 */ 849 mount_flags |= HSFSMNT_NOTRAILSPACE; 850 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 851 fsp->hsfs_namelen = ISO_FILE_NAMELEN; 852 vfs_clearmntopt(vfsp, HOPT_RR); 853 vfs_clearmntopt(vfsp, HOPT_VERS2); 854 vfs_clearmntopt(vfsp, HOPT_JOLIET); 855 break; 856 857 case HS_VOL_TYPE_ISO_V2: 858 /* 859 * if iso v2, don't copy NOTRAILDOT to hsfs_flags 860 */ 861 mount_flags &= ~HSFSMNT_NOTRAILDOT; 862 mount_flags |= HSFSMNT_NOMAPLCASE | HSFSMNT_NOVERSION; 863 fsp->hsfs_namemax = ISO_NAMELEN_V2_MAX; 864 fsp->hsfs_namelen = ISO_NAMELEN_V2; 865 vfs_setmntopt(vfsp, HOPT_VERS2, NULL, 0); 866 vfs_clearmntopt(vfsp, HOPT_RR); 867 vfs_clearmntopt(vfsp, HOPT_JOLIET); 868 break; 869 870 case HS_VOL_TYPE_JOLIET: 871 /* 872 * if Joliet, don't copy NOMAPLCASE or NOTRAILDOT to hsfs_flags 873 */ 874 mount_flags &= ~(HSFSMNT_NOMAPLCASE | HSFSMNT_NOTRAILDOT); 875 mount_flags |= HSFSMNT_NOMAPLCASE; 876 if (mount_flags & HSFSMNT_JOLIETLONG) 877 fsp->hsfs_namemax = JOLIET_NAMELEN_MAX*3; /* UTF-8 */ 878 else 879 fsp->hsfs_namemax = MAXNAMELEN-1; 880 fsp->hsfs_namelen = JOLIET_NAMELEN*2; 881 vfs_setmntopt(vfsp, HOPT_JOLIET, NULL, 0); 882 vfs_clearmntopt(vfsp, HOPT_RR); 883 vfs_clearmntopt(vfsp, HOPT_VERS2); 884 break; 885 } 886 887 /* 888 * Add the HSFSMNT_INODE pseudo mount flag to the current mount flags. 889 */ 890 fsp->hsfs_flags = mount_flags | (fsp->hsfs_flags & HSFSMNT_INODE); 891 892 DTRACE_PROBE1(mount__done, struct hsfs *, fsp); 893 894 /* 895 * set the magic word 896 */ 897 fsp->hsfs_magic = HSFS_MAGIC; 898 mutex_exit(&hs_mounttab_lock); 899 900 kmem_free(svp, sizeof (*svp)); 901 kmem_free(jvp, sizeof (*jvp)); 902 903 return (0); 904 905cleanup: 906 (void) VOP_CLOSE(devvp, FREAD, 1, (offset_t)0, cr); 907 VN_RELE(devvp); 908 if (fsp) 909 kmem_free(fsp, sizeof (*fsp)); 910 if (svp) 911 kmem_free(svp, sizeof (*svp)); 912 if (jvp) 913 kmem_free(jvp, sizeof (*jvp)); 914 return (error); 915} 916 917/* 918 * Get the rootvp associated with fsp->hsfs_vol 919 */ 920static int 921hs_getrootvp( 922 struct vfs *vfsp, 923 struct hsfs *fsp, 924 size_t pathsize) 925{ 926 struct hsnode *hp; 927 928 ASSERT(pathsize == strlen(fsp->hsfs_fsmnt) + 1); 929 930 /* 931 * If the root directory does not appear to be 932 * valid, use what it points to as "." instead. 933 * Some Defense Mapping Agency disks are non-conformant 934 * in this way. 935 */ 936 if (!hsfs_valid_dir(&fsp->hsfs_vol.root_dir)) { 937 hs_log_bogus_disk_warning(fsp, HSFS_ERR_BAD_ROOT_DIR, 0); 938 if (hs_remakenode(fsp->hsfs_vol.root_dir.ext_lbn, 939 (uint_t)0, vfsp, &fsp->hsfs_rootvp)) { 940 hs_mounttab = hs_mounttab->hsfs_next; 941 mutex_destroy(&fsp->hsfs_free_lock); 942 rw_destroy(&fsp->hsfs_hash_lock); 943 kmem_free(fsp->hsfs_fsmnt, pathsize); 944 mutex_exit(&hs_mounttab_lock); 945 return (0); 946 } 947 } else { 948 fsp->hsfs_rootvp = hs_makenode(&fsp->hsfs_vol.root_dir, 949 fsp->hsfs_vol.root_dir.ext_lbn, 0, vfsp); 950 } 951 952 /* XXX - ignore the path table for now */ 953 fsp->hsfs_ptbl = NULL; 954 hp = VTOH(fsp->hsfs_rootvp); 955 hp->hs_ptbl_idx = NULL; 956 957 return (1); 958} 959 960/* 961 * hs_findhsvol() 962 * 963 * Locate the Standard File Structure Volume Descriptor and 964 * parse it into an hs_volume structure. 965 * 966 * XXX - May someday want to look for Coded Character Set FSVD, too. 967 */ 968static int 969hs_findhsvol(struct hsfs *fsp, struct vnode *vp, struct hs_volume *hvp) 970{ 971 struct buf *secbp; 972 int i; 973 int n; 974 uchar_t *volp; 975 int error; 976 uint_t secno; 977 978 secno = hs_findvoldesc(vp->v_rdev, HS_VOLDESC_SEC); 979 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 980 error = geterror(secbp); 981 982 if (error != 0) { 983 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", error); 984 brelse(secbp); 985 return (error); 986 } 987 988 volp = (uchar_t *)secbp->b_un.b_addr; 989 990 /* 991 * To avoid that we read the whole medium in case that someone prepares 992 * a malicious "fs image", we read at most 32 blocks. 993 */ 994 for (n = 0; n < 32 && 995 HSV_DESC_TYPE(volp) != VD_EOV; n++) { 996 for (i = 0; i < HSV_ID_STRLEN; i++) 997 if (HSV_STD_ID(volp)[i] != HSV_ID_STRING[i]) 998 goto cantfind; 999 if (HSV_STD_VER(volp) != HSV_ID_VER) 1000 goto cantfind; 1001 switch (HSV_DESC_TYPE(volp)) { 1002 case VD_SFS: 1003 /* Standard File Structure */ 1004 fsp->hsfs_vol_type = HS_VOL_TYPE_HS; 1005 error = hs_parsehsvol(fsp, volp, hvp); 1006 brelse(secbp); 1007 return (error); 1008 1009 case VD_CCFS: 1010 /* Coded Character File Structure */ 1011 case VD_BOOT: 1012 case VD_UNSPEC: 1013 case VD_EOV: 1014 break; 1015 } 1016 brelse(secbp); 1017 ++secno; 1018 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1019 1020 error = geterror(secbp); 1021 1022 if (error != 0) { 1023 cmn_err(CE_NOTE, "hs_findhsvol: bread: error=(%d)", 1024 error); 1025 brelse(secbp); 1026 return (error); 1027 } 1028 1029 volp = (uchar_t *)secbp->b_un.b_addr; 1030 } 1031cantfind: 1032 brelse(secbp); 1033 return (EINVAL); 1034} 1035 1036/* 1037 * hs_parsehsvol 1038 * 1039 * Parse the Standard File Structure Volume Descriptor into 1040 * an hs_volume structure. We can't just bcopy it into the 1041 * structure because of byte-ordering problems. 1042 * 1043 */ 1044static int 1045hs_parsehsvol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1046{ 1047 hvp->vol_size = HSV_VOL_SIZE(volp); 1048 hvp->lbn_size = HSV_BLK_SIZE(volp); 1049 if (hvp->lbn_size == 0) { 1050 cmn_err(CE_NOTE, "hs_parsehsvol: logical block size in the " 1051 "SFSVD is zero"); 1052 return (EINVAL); 1053 } 1054 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1055 hvp->lbn_secshift = ffs((long)howmany(HS_SECTOR_SIZE, 1056 (int)hvp->lbn_size)) - 1; 1057 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1058 hs_parse_longdate(HSV_cre_date(volp), &hvp->cre_date); 1059 hs_parse_longdate(HSV_mod_date(volp), &hvp->mod_date); 1060 hvp->file_struct_ver = HSV_FILE_STRUCT_VER(volp); 1061 hvp->ptbl_len = HSV_PTBL_SIZE(volp); 1062 hvp->vol_set_size = (ushort_t)HSV_SET_SIZE(volp); 1063 hvp->vol_set_seq = (ushort_t)HSV_SET_SEQ(volp); 1064#if defined(_LITTLE_ENDIAN) 1065 hvp->ptbl_lbn = HSV_PTBL_MAN_LS(volp); 1066#else 1067 hvp->ptbl_lbn = HSV_PTBL_MAN_MS(volp); 1068#endif 1069 hs_copylabel(hvp, HSV_VOL_ID(volp), 0); 1070 1071 /* 1072 * Make sure that lbn_size is a power of two and otherwise valid. 1073 */ 1074 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1075 cmn_err(CE_NOTE, 1076 "hsfs: %d-byte logical block size not supported", 1077 hvp->lbn_size); 1078 return (EINVAL); 1079 } 1080 return (hs_parsedir(fsp, HSV_ROOT_DIR(volp), &hvp->root_dir, 1081 (char *)NULL, (int *)NULL, HDE_ROOT_DIR_REC_SIZE)); 1082} 1083 1084/* 1085 * hs_findisovol() 1086 * 1087 * Locate the Primary Volume Descriptor 1088 * parse it into an hs_volume structure. 1089 * 1090 * XXX - Partition not yet done 1091 * 1092 * Except for fsp->hsfs_vol_type, no fsp member may be modified. 1093 * fsp->hsfs_vol is modified indirectly via the *hvp argument. 1094 */ 1095static int 1096hs_findisovol(struct hsfs *fsp, struct vnode *vp, 1097 struct hs_volume *hvp, 1098 struct hs_volume *svp, 1099 struct hs_volume *jvp) 1100{ 1101 struct buf *secbp; 1102 int i; 1103 int n; 1104 uchar_t *volp; 1105 int error; 1106 uint_t secno; 1107 int foundpvd = 0; 1108 int foundsvd = 0; 1109 int foundjvd = 0; 1110 int pvd_sum = 0; 1111 1112 secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC); 1113 secbp = bread(vp->v_rdev, secno * 4, ISO_SECTOR_SIZE); 1114 error = geterror(secbp); 1115 1116 if (error != 0) { 1117 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", error); 1118 brelse(secbp); 1119 return (error); 1120 } 1121 1122 volp = (uchar_t *)secbp->b_un.b_addr; 1123 1124 /* 1125 * To avoid that we read the whole medium in case that someone prepares 1126 * a malicious "fs image", we read at most 32 blocks. 1127 */ 1128 for (n = 0; n < 32 && 1129 (enum iso_voldesc_type) ISO_DESC_TYPE(volp) != ISO_VD_EOV; n++) { 1130 for (i = 0; i < ISO_ID_STRLEN; i++) 1131 if (ISO_STD_ID(volp)[i] != ISO_ID_STRING[i]) 1132 goto cantfind; 1133 switch (ISO_DESC_TYPE(volp)) { 1134 case ISO_VD_PVD: 1135 /* Standard File Structure */ 1136 if (ISO_STD_VER(volp) != ISO_ID_VER) 1137 goto cantfind; 1138 if (foundpvd != 1) { 1139 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1140 if (error = hs_parseisovol(fsp, volp, hvp)) { 1141 brelse(secbp); 1142 return (error); 1143 } 1144 foundpvd = 1; 1145 for (i = 0; i < ISO_SECTOR_SIZE; i++) 1146 pvd_sum += volp[i]; 1147 } 1148 break; 1149 case ISO_VD_SVD: 1150 /* Supplementary Volume Descriptor */ 1151 if (ISO_STD_VER(volp) == ISO_ID_VER2 && 1152 foundsvd != 1) { 1153 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1154 if (error = hs_parseisovol(fsp, volp, svp)) { 1155 brelse(secbp); 1156 return (error); 1157 } 1158 foundsvd = 1; 1159 } 1160 if (hs_joliet_level(volp) >= 1 && foundjvd != 1) { 1161 fsp->hsfs_vol_type = HS_VOL_TYPE_ISO; 1162 if (error = hs_parseisovol(fsp, volp, jvp)) { 1163 brelse(secbp); 1164 return (error); 1165 } 1166 foundjvd = 1; 1167 } 1168 break; 1169 case ISO_VD_BOOT: 1170 break; 1171 case ISO_VD_VPD: 1172 /* currently cannot handle partition */ 1173 break; 1174 case VD_EOV: 1175 break; 1176 } 1177 brelse(secbp); 1178 ++secno; 1179 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1180 error = geterror(secbp); 1181 1182 if (error != 0) { 1183 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1184 error); 1185 brelse(secbp); 1186 return (error); 1187 } 1188 1189 volp = (uchar_t *)secbp->b_un.b_addr; 1190 } 1191 for (n = 0; n < 16; n++) { 1192 brelse(secbp); 1193 ++secno; 1194 secbp = bread(vp->v_rdev, secno * 4, HS_SECTOR_SIZE); 1195 error = geterror(secbp); 1196 1197 if (error != 0) { 1198 cmn_err(CE_NOTE, "hs_findisovol: bread: error=(%d)", 1199 error); 1200 brelse(secbp); 1201 return (error); 1202 } 1203 1204 /* 1205 * Check for the signature from mkisofs that grants that 1206 * the current filesystem allows to use the extent lbn as 1207 * inode number even in pure ISO9660 mode. 1208 */ 1209 volp = (uchar_t *)secbp->b_un.b_addr; 1210 if (strncmp((char *)volp, "MKI ", 4) == 0) { 1211 int sum; 1212 1213 sum = volp[2045]; 1214 sum *= 256; 1215 sum += volp[2046]; 1216 sum *= 256; 1217 sum += volp[2047]; 1218 if (sum == pvd_sum) 1219 fsp->hsfs_flags |= HSFSMNT_INODE; 1220 break; 1221 } 1222 } 1223 if (foundpvd) { 1224 brelse(secbp); 1225 return (0); 1226 } 1227cantfind: 1228 brelse(secbp); 1229 return (EINVAL); 1230} 1231 1232/* 1233 * Return 0 if no Joliet is found 1234 * else return Joliet Level 1..3 1235 */ 1236static int 1237hs_joliet_level(uchar_t *volp) 1238{ 1239 if (ISO_std_ver(volp)[0] == ISO_ID_VER && 1240 ISO_svd_esc(volp)[0] == '%' && 1241 ISO_svd_esc(volp)[1] == '/') { 1242 1243 switch (ISO_svd_esc(volp)[2]) { 1244 1245 case '@': 1246 return (1); 1247 case 'C': 1248 return (2); 1249 case 'E': 1250 return (3); 1251 } 1252 } 1253 return (0); 1254} 1255 1256/* 1257 * hs_parseisovol 1258 * 1259 * Parse the Primary Volume Descriptor into an hs_volume structure. 1260 * 1261 */ 1262static int 1263hs_parseisovol(struct hsfs *fsp, uchar_t *volp, struct hs_volume *hvp) 1264{ 1265 hvp->vol_size = ISO_VOL_SIZE(volp); 1266 hvp->lbn_size = ISO_BLK_SIZE(volp); 1267 if (hvp->lbn_size == 0) { 1268 cmn_err(CE_NOTE, "hs_parseisovol: logical block size in the " 1269 "PVD is zero"); 1270 return (EINVAL); 1271 } 1272 hvp->lbn_shift = ffs((long)hvp->lbn_size) - 1; 1273 hvp->lbn_secshift = ffs((long)howmany(ISO_SECTOR_SIZE, 1274 (int)hvp->lbn_size)) - 1; 1275 hvp->lbn_maxoffset = hvp->lbn_size - 1; 1276 hs_parse_longdate(ISO_cre_date(volp), &hvp->cre_date); 1277 hs_parse_longdate(ISO_mod_date(volp), &hvp->mod_date); 1278 hvp->file_struct_ver = ISO_FILE_STRUCT_VER(volp); 1279 hvp->ptbl_len = ISO_PTBL_SIZE(volp); 1280 hvp->vol_set_size = (ushort_t)ISO_SET_SIZE(volp); 1281 hvp->vol_set_seq = (ushort_t)ISO_SET_SEQ(volp); 1282#if defined(_LITTLE_ENDIAN) 1283 hvp->ptbl_lbn = ISO_PTBL_MAN_LS(volp); 1284#else 1285 hvp->ptbl_lbn = ISO_PTBL_MAN_MS(volp); 1286#endif 1287 hs_copylabel(hvp, ISO_VOL_ID(volp), hs_joliet_level(volp) >= 1); 1288 1289 /* 1290 * Make sure that lbn_size is a power of two and otherwise valid. 1291 */ 1292 if (hvp->lbn_size & ~(1 << hvp->lbn_shift)) { 1293 cmn_err(CE_NOTE, 1294 "hsfs: %d-byte logical block size not supported", 1295 hvp->lbn_size); 1296 return (EINVAL); 1297 } 1298 return (hs_parsedir(fsp, ISO_ROOT_DIR(volp), &hvp->root_dir, 1299 (char *)NULL, (int *)NULL, IDE_ROOT_DIR_REC_SIZE)); 1300} 1301 1302/* 1303 * Common code for mount and umount. 1304 * Check that the user's argument is a reasonable 1305 * thing on which to mount, and return the device number if so. 1306 */ 1307static int 1308hs_getmdev(struct vfs *vfsp, char *fspec, int flags, dev_t *pdev, mode_t *mode, 1309 cred_t *cr) 1310{ 1311 int error; 1312 struct vnode *vp; 1313 struct vattr vap; 1314 dev_t dev; 1315 1316 /* 1317 * Get the device to be mounted 1318 */ 1319 error = lookupname(fspec, (flags & MS_SYSSPACE) ? 1320 UIO_SYSSPACE : UIO_USERSPACE, FOLLOW, NULLVPP, &vp); 1321 if (error) { 1322 if (error == ENOENT) { 1323 return (ENODEV); /* needs translation */ 1324 } 1325 return (error); 1326 } 1327 if (vp->v_type != VBLK) { 1328 VN_RELE(vp); 1329 return (ENOTBLK); 1330 } 1331 /* 1332 * Can we read from the device? 1333 */ 1334 if ((error = VOP_ACCESS(vp, VREAD, 0, cr)) != 0 || 1335 (error = secpolicy_spec_open(cr, vp, FREAD)) != 0) { 1336 VN_RELE(vp); 1337 return (error); 1338 } 1339 1340 vap.va_mask = AT_MODE; /* get protection mode */ 1341 (void) VOP_GETATTR(vp, &vap, 0, CRED()); 1342 *mode = vap.va_mode; 1343 1344 dev = *pdev = vp->v_rdev; 1345 VN_RELE(vp); 1346 1347 /* 1348 * Ensure that this device isn't already mounted, 1349 * unless this is a REMOUNT request or we are told to suppress 1350 * mount checks. 1351 */ 1352 if ((flags & MS_NOCHECK) == 0) { 1353 if (vfs_devmounting(dev, vfsp)) 1354 return (EBUSY); 1355 if (vfs_devismounted(dev) && !(flags & MS_REMOUNT)) 1356 return (EBUSY); 1357 } 1358 1359 if (getmajor(*pdev) >= devcnt) 1360 return (ENXIO); 1361 return (0); 1362} 1363 1364static void 1365hs_copylabel(struct hs_volume *hvp, unsigned char *label, int isjoliet) 1366{ 1367 char lbuf[64]; /* hs_joliet_cp() creates 48 bytes at most */ 1368 1369 if (isjoliet) { 1370 /* 1371 * hs_joliet_cp() will output 16..48 bytes. 1372 * We need to clear 'lbuf' to avoid junk chars past byte 15. 1373 */ 1374 bzero(lbuf, sizeof (lbuf)); 1375 (void) hs_joliet_cp((char *)label, lbuf, 32); 1376 label = (unsigned char *)lbuf; 1377 } 1378 /* cdrom volid is at most 32 bytes */ 1379 bcopy(label, hvp->vol_id, 32); 1380 hvp->vol_id[31] = NULL; 1381} 1382 1383/* 1384 * Mount root file system. 1385 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to 1386 * remount the root file system, and ROOT_UNMOUNT if called to 1387 * unmount the root (e.g., as part of a system shutdown). 1388 * 1389 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP 1390 * operation, goes along with auto-configuration. A mechanism should be 1391 * provided by which machine-INdependent code in the kernel can say "get me the 1392 * right root file system" and "get me the right initial swap area", and have 1393 * that done in what may well be a machine-dependent fashion. 1394 * Unfortunately, it is also file-system-type dependent (NFS gets it via 1395 * bootparams calls, UFS gets it from various and sundry machine-dependent 1396 * mechanisms, as SPECFS does for swap). 1397 */ 1398static int 1399hsfs_mountroot(struct vfs *vfsp, enum whymountroot why) 1400{ 1401 int error; 1402 struct hsfs *fsp; 1403 struct hs_volume *fvolp; 1404 static int hsfsrootdone = 0; 1405 dev_t rootdev; 1406 mode_t mode = 0; 1407 1408 if (why == ROOT_INIT) { 1409 if (hsfsrootdone++) 1410 return (EBUSY); 1411 rootdev = getrootdev(); 1412 if (rootdev == (dev_t)NODEV) 1413 return (ENODEV); 1414 vfsp->vfs_dev = rootdev; 1415 vfsp->vfs_flag |= VFS_RDONLY; 1416 } else if (why == ROOT_REMOUNT) { 1417 cmn_err(CE_NOTE, "hsfs_mountroot: ROOT_REMOUNT"); 1418 return (0); 1419 } else if (why == ROOT_UNMOUNT) { 1420 return (0); 1421 } 1422 error = vfs_lock(vfsp); 1423 if (error) { 1424 cmn_err(CE_NOTE, "hsfs_mountroot: couldn't get vfs_lock"); 1425 return (error); 1426 } 1427 1428 error = hs_mountfs(vfsp, rootdev, "/", mode, 1, CRED(), 1); 1429 /* 1430 * XXX - assumes root device is not indirect, because we don't set 1431 * rootvp. Is rootvp used for anything? If so, make another arg 1432 * to mountfs. 1433 */ 1434 if (error) { 1435 vfs_unlock(vfsp); 1436 if (rootvp) { 1437 VN_RELE(rootvp); 1438 rootvp = (struct vnode *)0; 1439 } 1440 return (error); 1441 } 1442 if (why == ROOT_INIT) 1443 vfs_add((struct vnode *)0, vfsp, 1444 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1445 vfs_unlock(vfsp); 1446 fsp = VFS_TO_HSFS(vfsp); 1447 fvolp = &fsp->hsfs_vol; 1448#ifdef HSFS_CLKSET 1449 if (fvolp->cre_date.tv_sec == 0) { 1450 cmn_err(CE_NOTE, "hsfs_mountroot: cre_date.tv_sec == 0"); 1451 if (fvolp->mod_date.tv_sec == 0) { 1452 cmn_err(CE_NOTE, "hsfs_mountroot: mod_date.tv_sec == 0"); 1453 cmn_err(CE_NOTE, "hsfs_mountroot: clkset(-1L)"); 1454 clkset(-1L); 1455 } else 1456 clkset(fvolp->mod_date.tv_sec); 1457 } else 1458 clkset(fvolp->mod_date.tv_sec); 1459#else /* HSFS_CLKSET */ 1460 clkset(-1L); 1461#endif /* HSFS_CLKSET */ 1462 return (0); 1463} 1464 1465/* 1466 * hs_findvoldesc() 1467 * 1468 * Return the sector where the volume descriptor lives. This is 1469 * a fixed value for "normal" cd-rom's, but can change for 1470 * multisession cd's. 1471 * 1472 * desc_sec is the same for high-sierra and iso 9660 formats, why 1473 * there are two differnt #defines used in the code for this is 1474 * beyond me. These are standards, cast in concrete, right? 1475 * To be general, however, this function supports passing in different 1476 * values. 1477 */ 1478static int 1479hs_findvoldesc(dev_t rdev, int desc_sec) 1480{ 1481 int secno; 1482 int error; 1483 int rval; /* ignored */ 1484 1485#ifdef CDROMREADOFFSET 1486 /* 1487 * Issue the Read Offset ioctl directly to the 1488 * device. Ignore any errors and set starting 1489 * secno to the default, otherwise add the 1490 * VOLDESC sector number to the offset. 1491 */ 1492 error = cdev_ioctl(rdev, CDROMREADOFFSET, (intptr_t)&secno, 1493 FNATIVE|FKIOCTL|FREAD, CRED(), &rval); 1494 if (error) { 1495 secno = desc_sec; 1496 } else { 1497 secno += desc_sec; 1498 } 1499#else 1500 secno = desc_sec; 1501#endif 1502 1503 return (secno); 1504} 1505