cd9660_vfsops.c revision 1.63.6.1.2.1
1 /* $NetBSD: cd9660_vfsops.c,v 1.63.6.1.2.1 2014/04/28 16:03:14 sborrill Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace (at) blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai (at) spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.63.6.1.2.1 2014/04/28 16:03:14 sborrill Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/sysctl.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/proc.h> 51 #include <sys/kernel.h> 52 #include <sys/vnode.h> 53 #include <miscfs/genfs/genfs.h> 54 #include <miscfs/specfs/specdev.h> 55 #include <sys/mount.h> 56 #include <sys/buf.h> 57 #include <sys/file.h> 58 #include <sys/disklabel.h> 59 #include <sys/device.h> 60 #include <sys/ioctl.h> 61 #include <sys/cdio.h> 62 #include <sys/errno.h> 63 #include <sys/malloc.h> 64 #include <sys/pool.h> 65 #include <sys/stat.h> 66 #include <sys/conf.h> 67 #include <sys/dirent.h> 68 #include <sys/kauth.h> 69 #include <sys/module.h> 70 71 #include <fs/cd9660/iso.h> 72 #include <fs/cd9660/cd9660_extern.h> 73 #include <fs/cd9660/iso_rrip.h> 74 #include <fs/cd9660/cd9660_node.h> 75 #include <fs/cd9660/cd9660_mount.h> 76 77 MODULE(MODULE_CLASS_VFS, cd9660, NULL); 78 79 MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 80 81 static struct sysctllog *cd9660_sysctl_log; 82 83 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 84 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 85 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 86 87 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 88 &cd9660_vnodeop_opv_desc, 89 &cd9660_specop_opv_desc, 90 &cd9660_fifoop_opv_desc, 91 NULL, 92 }; 93 94 struct vfsops cd9660_vfsops = { 95 MOUNT_CD9660, 96 sizeof (struct iso_args), 97 cd9660_mount, 98 cd9660_start, 99 cd9660_unmount, 100 cd9660_root, 101 (void *)eopnotsupp, 102 cd9660_statvfs, 103 cd9660_sync, 104 cd9660_vget, 105 cd9660_fhtovp, 106 cd9660_vptofh, 107 cd9660_init, 108 cd9660_reinit, 109 cd9660_done, 110 cd9660_mountroot, 111 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 112 vfs_stdextattrctl, 113 (void *)eopnotsupp, /* vfs_suspendctl */ 114 genfs_renamelock_enter, 115 genfs_renamelock_exit, 116 (void *)eopnotsupp, 117 cd9660_vnodeopv_descs, 118 0, /* refcount */ 119 { NULL, NULL } /* list */ 120 }; 121 122 static const struct genfs_ops cd9660_genfsops = { 123 .gop_size = genfs_size, 124 }; 125 126 /* 127 * Called by vfs_mountroot when iso is going to be mounted as root. 128 * 129 * Name is updated by mount(8) after booting. 130 */ 131 #define ROOTNAME "root_device" 132 133 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 134 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 135 struct lwp *l, struct iso_args *argp); 136 137 static int 138 cd9660_modcmd(modcmd_t cmd, void *arg) 139 { 140 int error; 141 142 switch (cmd) { 143 case MODULE_CMD_INIT: 144 error = vfs_attach(&cd9660_vfsops); 145 if (error != 0) 146 break; 147 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 148 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, 149 NULL, 0, NULL, 0, 150 CTL_VFS, CTL_EOL); 151 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 152 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 153 SYSCTL_DESCR("ISO-9660 file system"), 154 NULL, 0, NULL, 0, 155 CTL_VFS, 14, CTL_EOL); 156 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, 157 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 158 CTLTYPE_INT, "utf8_joliet", 159 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 160 NULL, 0, &cd9660_utf8_joliet, 0, 161 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 162 /* 163 * XXX the "14" above could be dynamic, thereby eliminating 164 * one more instance of the "number to vfs" mapping problem, 165 * but "14" is the order as taken from sys/mount.h 166 */ 167 break; 168 case MODULE_CMD_FINI: 169 error = vfs_detach(&cd9660_vfsops); 170 if (error != 0) 171 break; 172 sysctl_teardown(&cd9660_sysctl_log); 173 break; 174 default: 175 error = ENOTTY; 176 break; 177 } 178 179 return (error); 180 } 181 182 int 183 cd9660_mountroot(void) 184 { 185 struct mount *mp; 186 struct lwp *l = curlwp; 187 int error; 188 struct iso_args args; 189 190 if (device_class(root_device) != DV_DISK) 191 return (ENODEV); 192 193 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 194 != 0) { 195 vrele(rootvp); 196 return (error); 197 } 198 199 args.flags = ISOFSMNT_ROOT; 200 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 201 vfs_unbusy(mp, false, NULL); 202 vfs_destroy(mp); 203 return (error); 204 } 205 mutex_enter(&mountlist_lock); 206 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 207 mutex_exit(&mountlist_lock); 208 (void)cd9660_statvfs(mp, &mp->mnt_stat); 209 vfs_unbusy(mp, false, NULL); 210 return (0); 211 } 212 213 /* 214 * VFS Operations. 215 * 216 * mount system call 217 */ 218 int 219 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 220 { 221 struct lwp *l = curlwp; 222 struct nameidata nd; 223 struct vnode *devvp; 224 struct iso_args *args = data; 225 int error; 226 struct iso_mnt *imp = VFSTOISOFS(mp); 227 228 if (args == NULL) 229 return EINVAL; 230 if (*data_len < sizeof *args) 231 return EINVAL; 232 233 if (mp->mnt_flag & MNT_GETARGS) { 234 if (imp == NULL) 235 return EIO; 236 args->fspec = NULL; 237 args->flags = imp->im_flags; 238 *data_len = sizeof (*args); 239 return 0; 240 } 241 242 if ((mp->mnt_flag & MNT_RDONLY) == 0) 243 return (EROFS); 244 245 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 246 return EINVAL; 247 248 /* 249 * Not an update, or updating the name: look up the name 250 * and verify that it refers to a sensible block device. 251 */ 252 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 253 if ((error = namei(&nd)) != 0) 254 return (error); 255 devvp = nd.ni_vp; 256 257 if (devvp->v_type != VBLK) { 258 vrele(devvp); 259 return ENOTBLK; 260 } 261 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 262 vrele(devvp); 263 return ENXIO; 264 } 265 /* 266 * If mount by non-root, then verify that user has necessary 267 * permissions on the device. 268 */ 269 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { 270 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 271 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 272 VOP_UNLOCK(devvp, 0); 273 if (error) { 274 vrele(devvp); 275 return (error); 276 } 277 } 278 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 279 error = VOP_OPEN(devvp, FREAD, FSCRED); 280 if (error) 281 goto fail; 282 error = iso_mountfs(devvp, mp, l, args); 283 if (error) { 284 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 285 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 286 VOP_UNLOCK(devvp, 0); 287 goto fail; 288 } 289 } else { 290 vrele(devvp); 291 if (devvp != imp->im_devvp && 292 devvp->v_rdev != imp->im_devvp->v_rdev) 293 return (EINVAL); /* needs translation */ 294 } 295 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 296 mp->mnt_op->vfs_name, mp, l); 297 298 fail: 299 vrele(devvp); 300 return (error); 301 } 302 303 /* 304 * Make a mount point from a volume descriptor 305 */ 306 static int 307 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 308 { 309 struct iso_primary_descriptor *pri; 310 int logical_block_size; 311 struct iso_directory_record *rootp; 312 313 pri = (struct iso_primary_descriptor *)bp->b_data; 314 315 logical_block_size = isonum_723 (pri->logical_block_size); 316 317 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 318 || (logical_block_size & (logical_block_size - 1)) != 0) 319 return -1; 320 321 rootp = (struct iso_directory_record *)pri->root_directory_record; 322 323 isomp->logical_block_size = logical_block_size; 324 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 325 memcpy(isomp->root, rootp, sizeof(isomp->root)); 326 isomp->root_extent = isonum_733 (rootp->extent); 327 isomp->root_size = isonum_733 (rootp->size); 328 isomp->im_joliet_level = 0; 329 330 isomp->im_bmask = logical_block_size - 1; 331 isomp->im_bshift = 0; 332 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 333 isomp->im_bshift++; 334 335 if (ea_len != NULL) 336 *ea_len = isonum_711(rootp->ext_attr_length); 337 338 return 0; 339 } 340 341 /* 342 * Common code for mount and mountroot 343 */ 344 static int 345 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 346 struct iso_args *argp) 347 { 348 struct iso_mnt *isomp = (struct iso_mnt *)0; 349 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 350 dev_t dev = devvp->v_rdev; 351 int error = EINVAL; 352 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 353 int iso_bsize; 354 int iso_blknum; 355 int joliet_level; 356 struct iso_volume_descriptor *vdp; 357 struct iso_supplementary_descriptor *sup; 358 int sess = 0; 359 int ext_attr_length; 360 struct disklabel label; 361 362 if (!ronly) 363 return EROFS; 364 365 /* Flush out any old buffers remaining from a previous use. */ 366 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 367 return (error); 368 369 /* This is the "logical sector size". The standard says this 370 * should be 2048 or the physical sector size on the device, 371 * whichever is greater. For now, we'll just use a constant. 372 */ 373 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 374 375 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 376 if (!error && 377 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) { 378 /* XXX more sanity checks? */ 379 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 380 } else { 381 /* fallback to old method */ 382 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 383 if (error) 384 sess = 0; /* never mind */ 385 } 386 #ifdef ISO_DEBUG 387 printf("isofs: session offset (part %d) %d\n", DISKPART(dev), sess); 388 #endif 389 390 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 391 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 392 iso_bsize, NOCRED, 0, &bp)) != 0) 393 goto out; 394 395 vdp = (struct iso_volume_descriptor *)bp->b_data; 396 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 397 error = EINVAL; 398 goto out; 399 } 400 401 switch (isonum_711(vdp->type)) { 402 case ISO_VD_PRIMARY: 403 if (pribp == NULL) { 404 pribp = bp; 405 bp = NULL; 406 } 407 break; 408 409 case ISO_VD_SUPPLEMENTARY: 410 if (supbp == NULL) { 411 supbp = bp; 412 bp = NULL; 413 } 414 break; 415 416 default: 417 break; 418 } 419 420 if (isonum_711 (vdp->type) == ISO_VD_END) { 421 brelse(bp, 0); 422 bp = NULL; 423 break; 424 } 425 426 if (bp != NULL) { 427 brelse(bp, 0); 428 bp = NULL; 429 } 430 } 431 432 if (pribp == NULL) { 433 error = EINVAL; 434 goto out; 435 } 436 437 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 438 memset(isomp, 0, sizeof *isomp); 439 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 440 error = EINVAL; 441 goto out; 442 } 443 444 isomp->volume_space_size += sess; 445 446 brelse(pribp, BC_AGE); 447 pribp = NULL; 448 449 mp->mnt_data = isomp; 450 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 451 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 452 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 453 mp->mnt_stat.f_namemax = MAXNAMLEN; 454 mp->mnt_flag |= MNT_LOCAL; 455 mp->mnt_iflag |= IMNT_MPSAFE; 456 mp->mnt_dev_bshift = iso_bsize; 457 mp->mnt_fs_bshift = isomp->im_bshift; 458 isomp->im_mountp = mp; 459 isomp->im_dev = dev; 460 isomp->im_devvp = devvp; 461 462 /* Check the Rock Ridge Extension support */ 463 if (!(argp->flags & ISOFSMNT_NORRIP)) { 464 struct iso_directory_record *rootp; 465 466 if ((error = bread(isomp->im_devvp, 467 (isomp->root_extent + ext_attr_length) << 468 (isomp->im_bshift - DEV_BSHIFT), 469 isomp->logical_block_size, NOCRED, 470 0, &bp)) != 0) 471 goto out; 472 473 rootp = (struct iso_directory_record *)bp->b_data; 474 475 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 476 argp->flags |= ISOFSMNT_NORRIP; 477 } else { 478 argp->flags &= ~ISOFSMNT_GENS; 479 } 480 481 /* 482 * The contents are valid, 483 * but they will get reread as part of another vnode, so... 484 */ 485 brelse(bp, BC_AGE); 486 bp = NULL; 487 } 488 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 489 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); 490 491 if (isomp->im_flags & ISOFSMNT_GENS) 492 isomp->iso_ftype = ISO_FTYPE_9660; 493 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 494 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 495 if (argp->flags & ISOFSMNT_NOCASETRANS) 496 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 497 } else 498 isomp->iso_ftype = ISO_FTYPE_RRIP; 499 500 /* Check the Joliet Extension support */ 501 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 502 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 503 supbp != NULL) { 504 joliet_level = 0; 505 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 506 507 if ((isonum_711(sup->flags) & 1) == 0) { 508 if (memcmp(sup->escape, "%/@", 3) == 0) 509 joliet_level = 1; 510 if (memcmp(sup->escape, "%/C", 3) == 0) 511 joliet_level = 2; 512 if (memcmp(sup->escape, "%/E", 3) == 0) 513 joliet_level = 3; 514 } 515 if (joliet_level != 0) { 516 if (iso_makemp(isomp, supbp, NULL) == -1) { 517 error = EINVAL; 518 goto out; 519 } 520 isomp->im_joliet_level = joliet_level; 521 } 522 } 523 524 if (supbp != NULL) { 525 brelse(supbp, 0); 526 supbp = NULL; 527 } 528 529 devvp->v_specmountpoint = mp; 530 531 return 0; 532 out: 533 if (bp) 534 brelse(bp, 0); 535 if (pribp) 536 brelse(pribp, 0); 537 if (supbp) 538 brelse(supbp, 0); 539 if (isomp) { 540 free(isomp, M_ISOFSMNT); 541 mp->mnt_data = NULL; 542 } 543 return error; 544 } 545 546 /* 547 * Make a filesystem operational. 548 * Nothing to do at the moment. 549 */ 550 /* ARGSUSED */ 551 int 552 cd9660_start(struct mount *mp, int flags) 553 { 554 return 0; 555 } 556 557 /* 558 * unmount system call 559 */ 560 int 561 cd9660_unmount(struct mount *mp, int mntflags) 562 { 563 struct iso_mnt *isomp; 564 int error, flags = 0; 565 566 if (mntflags & MNT_FORCE) 567 flags |= FORCECLOSE; 568 if ((error = vflush(mp, NULLVP, flags)) != 0) 569 return (error); 570 571 isomp = VFSTOISOFS(mp); 572 573 if (isomp->im_devvp->v_type != VBAD) 574 isomp->im_devvp->v_specmountpoint = NULL; 575 576 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 577 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 578 vput(isomp->im_devvp); 579 free(isomp, M_ISOFSMNT); 580 mp->mnt_data = NULL; 581 mp->mnt_flag &= ~MNT_LOCAL; 582 return (error); 583 } 584 585 /* 586 * Return root of a filesystem 587 */ 588 int 589 cd9660_root(struct mount *mp, struct vnode **vpp) 590 { 591 struct iso_mnt *imp = VFSTOISOFS(mp); 592 struct iso_directory_record *dp = 593 (struct iso_directory_record *)imp->root; 594 ino_t ino = isodirino(dp, imp); 595 596 /* 597 * With RRIP we must use the `.' entry of the root directory. 598 * Simply tell vget, that it's a relocated directory. 599 */ 600 return (cd9660_vget_internal(mp, ino, vpp, 601 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 602 } 603 604 /* 605 * Get file system statistics. 606 */ 607 int 608 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 609 { 610 struct iso_mnt *isomp; 611 612 isomp = VFSTOISOFS(mp); 613 614 sbp->f_bsize = isomp->logical_block_size; 615 sbp->f_frsize = sbp->f_bsize; 616 sbp->f_iosize = sbp->f_bsize; /* XXX */ 617 sbp->f_blocks = isomp->volume_space_size; 618 sbp->f_bfree = 0; /* total free blocks */ 619 sbp->f_bavail = 0; /* blocks free for non superuser */ 620 sbp->f_bresvd = 0; /* total reserved blocks */ 621 sbp->f_files = 0; /* total files */ 622 sbp->f_ffree = 0; /* free file nodes */ 623 sbp->f_favail = 0; /* free file nodes for non superuser */ 624 sbp->f_fresvd = 0; /* reserved file nodes */ 625 copy_statvfs_info(sbp, mp); 626 /* Use the first spare for flags: */ 627 sbp->f_spare[0] = isomp->im_flags; 628 return 0; 629 } 630 631 /* ARGSUSED */ 632 int 633 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 634 { 635 return 0; 636 } 637 638 /* 639 * File handle to vnode 640 * 641 * Have to be really careful about stale file handles: 642 * - check that the inode number is in range 643 * - call iget() to get the locked inode 644 * - check for an unallocated inode (i_mode == 0) 645 * - check that the generation number matches 646 */ 647 648 struct ifid { 649 ushort ifid_len; 650 ushort ifid_pad; 651 int ifid_ino; 652 long ifid_start; 653 }; 654 655 /* ARGSUSED */ 656 int 657 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 658 { 659 struct ifid ifh; 660 struct iso_node *ip; 661 struct vnode *nvp; 662 int error; 663 664 if (fhp->fid_len != sizeof(ifh)) 665 return EINVAL; 666 667 memcpy(&ifh, fhp, sizeof(ifh)); 668 #ifdef ISOFS_DBG 669 printf("fhtovp: ino %d, start %ld\n", 670 ifh.ifid_ino, ifh.ifid_start); 671 #endif 672 673 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 674 *vpp = NULLVP; 675 return (error); 676 } 677 ip = VTOI(nvp); 678 if (ip->inode.iso_mode == 0) { 679 vput(nvp); 680 *vpp = NULLVP; 681 return (ESTALE); 682 } 683 *vpp = nvp; 684 return (0); 685 } 686 687 int 688 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 689 { 690 691 /* 692 * XXXX 693 * It would be nice if we didn't always set the `relocated' flag 694 * and force the extra read, but I don't want to think about fixing 695 * that right now. 696 */ 697 return (cd9660_vget_internal(mp, ino, vpp, 698 #if 0 699 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 700 #else 701 0, 702 #endif 703 NULL)); 704 } 705 706 int 707 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, 708 int relocated, struct iso_directory_record *isodir) 709 { 710 struct iso_mnt *imp; 711 struct iso_node *ip; 712 struct buf *bp; 713 struct vnode *vp; 714 dev_t dev; 715 int error; 716 717 imp = VFSTOISOFS(mp); 718 dev = imp->im_dev; 719 720 retry: 721 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP) 722 return (0); 723 724 /* Allocate a new vnode/iso_node. */ 725 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) { 726 *vpp = NULLVP; 727 return (error); 728 } 729 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 730 731 /* 732 * If someone beat us to it, put back the freshly allocated 733 * vnode/inode pair and retry. 734 */ 735 mutex_enter(&cd9660_hashlock); 736 if (cd9660_ihashget(dev, ino, 0) != NULL) { 737 mutex_exit(&cd9660_hashlock); 738 ungetnewvnode(vp); 739 pool_put(&cd9660_node_pool, ip); 740 goto retry; 741 } 742 743 memset(ip, 0, sizeof(struct iso_node)); 744 vp->v_data = ip; 745 ip->i_vnode = vp; 746 ip->i_dev = dev; 747 ip->i_number = ino; 748 ip->i_mnt = imp; 749 ip->i_devvp = imp->im_devvp; 750 genfs_node_init(vp, &cd9660_genfsops); 751 752 /* 753 * Put it onto its hash chain and lock it so that other requests for 754 * this inode will block if they arrive while we are sleeping waiting 755 * for old data structures to be purged or for the contents of the 756 * disk portion of this inode to be read. 757 */ 758 cd9660_ihashins(ip); 759 mutex_exit(&cd9660_hashlock); 760 761 if (isodir == 0) { 762 int lbn, off; 763 764 lbn = lblkno(imp, ino); 765 if (lbn >= imp->volume_space_size) { 766 vput(vp); 767 printf("fhtovp: lbn exceed volume space %d\n", lbn); 768 return (ESTALE); 769 } 770 771 off = blkoff(imp, ino); 772 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 773 vput(vp); 774 printf("fhtovp: crosses block boundary %d\n", 775 off + ISO_DIRECTORY_RECORD_SIZE); 776 return (ESTALE); 777 } 778 779 error = bread(imp->im_devvp, 780 lbn << (imp->im_bshift - DEV_BSHIFT), 781 imp->logical_block_size, NOCRED, 0, &bp); 782 if (error) { 783 vput(vp); 784 brelse(bp, 0); 785 printf("fhtovp: bread error %d\n",error); 786 return (error); 787 } 788 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 789 790 if (off + isonum_711(isodir->length) > 791 imp->logical_block_size) { 792 vput(vp); 793 if (bp != 0) 794 brelse(bp, 0); 795 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 796 off +isonum_711(isodir->length), off, 797 isonum_711(isodir->length)); 798 return (ESTALE); 799 } 800 801 #if 0 802 if (isonum_733(isodir->extent) + 803 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 804 if (bp != 0) 805 brelse(bp, 0); 806 printf("fhtovp: file start miss %d vs %d\n", 807 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 808 ifhp->ifid_start); 809 return (ESTALE); 810 } 811 #endif 812 } else 813 bp = 0; 814 815 VREF(ip->i_devvp); 816 817 if (relocated) { 818 /* 819 * On relocated directories we must 820 * read the `.' entry out of a dir. 821 */ 822 ip->iso_start = ino >> imp->im_bshift; 823 if (bp != 0) 824 brelse(bp, 0); 825 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 826 vput(vp); 827 return (error); 828 } 829 isodir = (struct iso_directory_record *)bp->b_data; 830 } 831 832 ip->iso_extent = isonum_733(isodir->extent); 833 ip->i_size = isonum_733(isodir->size); 834 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 835 836 /* 837 * Setup time stamp, attribute 838 */ 839 vp->v_type = VNON; 840 switch (imp->iso_ftype) { 841 default: /* ISO_FTYPE_9660 */ 842 { 843 struct buf *bp2; 844 int off; 845 if ((imp->im_flags & ISOFSMNT_EXTATT) 846 && (off = isonum_711(isodir->ext_attr_length))) 847 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 848 NULL, &bp2); 849 else 850 bp2 = NULL; 851 cd9660_defattr(isodir, ip, bp2); 852 cd9660_deftstamp(isodir, ip, bp2); 853 if (bp2) 854 brelse(bp2, 0); 855 break; 856 } 857 case ISO_FTYPE_RRIP: 858 cd9660_rrip_analyze(isodir, ip, imp); 859 break; 860 } 861 862 if (bp != 0) 863 brelse(bp, 0); 864 865 /* 866 * Initialize the associated vnode 867 */ 868 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 869 case VFIFO: 870 vp->v_op = cd9660_fifoop_p; 871 break; 872 case VCHR: 873 case VBLK: 874 /* 875 * if device, look at device number table for translation 876 */ 877 vp->v_op = cd9660_specop_p; 878 spec_node_init(vp, ip->inode.iso_rdev); 879 break; 880 case VLNK: 881 case VNON: 882 case VSOCK: 883 case VDIR: 884 case VBAD: 885 break; 886 case VREG: 887 uvm_vnp_setsize(vp, ip->i_size); 888 break; 889 } 890 891 if (vp->v_type != VREG) 892 uvm_vnp_setsize(vp, 0); 893 894 if (ip->iso_extent == imp->root_extent) 895 vp->v_vflag |= VV_ROOT; 896 897 /* 898 * XXX need generation number? 899 */ 900 901 *vpp = vp; 902 return (0); 903 } 904 905 /* 906 * Vnode pointer to File handle 907 */ 908 /* ARGSUSED */ 909 int 910 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 911 { 912 struct iso_node *ip = VTOI(vp); 913 struct ifid ifh; 914 915 if (*fh_size < sizeof(struct ifid)) { 916 *fh_size = sizeof(struct ifid); 917 return E2BIG; 918 } 919 *fh_size = sizeof(struct ifid); 920 921 memset(&ifh, 0, sizeof(ifh)); 922 ifh.ifid_len = sizeof(struct ifid); 923 ifh.ifid_ino = ip->i_number; 924 ifh.ifid_start = ip->iso_start; 925 memcpy(fhp, &ifh, sizeof(ifh)); 926 927 #ifdef ISOFS_DBG 928 printf("vptofh: ino %d, start %ld\n", 929 ifh.ifid_ino,ifh.ifid_start); 930 #endif 931 return 0; 932 } 933
Indexes created Sun Oct 19 02:09:48 GMT 2025