cd9660_vfsops.c revision 1.103
1 /* $NetBSD: cd9660_vfsops.c,v 1.103 2024/02/03 22:39:27 christos 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 1.103 2024/02/03 22:39:27 christos 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 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; 82 extern const struct vnodeopv_desc cd9660_specop_opv_desc; 83 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; 84 85 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { 86 &cd9660_vnodeop_opv_desc, 87 &cd9660_specop_opv_desc, 88 &cd9660_fifoop_opv_desc, 89 NULL, 90 }; 91 92 struct vfsops cd9660_vfsops = { 93 .vfs_name = MOUNT_CD9660, 94 .vfs_min_mount_data = sizeof (struct iso_args), 95 .vfs_mount = cd9660_mount, 96 .vfs_start = cd9660_start, 97 .vfs_unmount = cd9660_unmount, 98 .vfs_root = cd9660_root, 99 .vfs_quotactl = (void *)eopnotsupp, 100 .vfs_statvfs = cd9660_statvfs, 101 .vfs_sync = cd9660_sync, 102 .vfs_vget = cd9660_vget, 103 .vfs_loadvnode = cd9660_loadvnode, 104 .vfs_fhtovp = cd9660_fhtovp, 105 .vfs_vptofh = cd9660_vptofh, 106 .vfs_init = cd9660_init, 107 .vfs_reinit = cd9660_reinit, 108 .vfs_done = cd9660_done, 109 .vfs_mountroot = cd9660_mountroot, 110 .vfs_snapshot = (void *)eopnotsupp, 111 .vfs_extattrctl = vfs_stdextattrctl, 112 .vfs_suspendctl = genfs_suspendctl, 113 .vfs_renamelock_enter = genfs_renamelock_enter, 114 .vfs_renamelock_exit = genfs_renamelock_exit, 115 .vfs_fsync = (void *)eopnotsupp, 116 .vfs_opv_descs = cd9660_vnodeopv_descs 117 }; 118 119 static const struct genfs_ops cd9660_genfsops = { 120 .gop_size = genfs_size, 121 }; 122 123 /* 124 * Called by vfs_mountroot when iso is going to be mounted as root. 125 * 126 * Name is updated by mount(8) after booting. 127 */ 128 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); 129 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 130 struct lwp *l, struct iso_args *argp); 131 132 SYSCTL_SETUP(cd9660_sysctl_setup, "cd9660 sysctl") 133 { 134 135 sysctl_createv(clog, 0, NULL, NULL, 136 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660", 137 SYSCTL_DESCR("ISO-9660 file system"), 138 NULL, 0, NULL, 0, 139 CTL_VFS, 14, CTL_EOL); 140 sysctl_createv(clog, 0, NULL, NULL, 141 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 142 CTLTYPE_INT, "utf8_joliet", 143 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"), 144 NULL, 0, &cd9660_utf8_joliet, 0, 145 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); 146 /* 147 * XXX the "14" above could be dynamic, thereby eliminating 148 * one more instance of the "number to vfs" mapping problem, 149 * but "14" is the order as taken from sys/mount.h 150 */ 151 } 152 153 static int 154 cd9660_modcmd(modcmd_t cmd, void *arg) 155 { 156 int error; 157 158 switch (cmd) { 159 case MODULE_CMD_INIT: 160 error = vfs_attach(&cd9660_vfsops); 161 if (error != 0) 162 break; 163 break; 164 case MODULE_CMD_FINI: 165 error = vfs_detach(&cd9660_vfsops); 166 if (error != 0) 167 break; 168 break; 169 default: 170 error = ENOTTY; 171 break; 172 } 173 174 return (error); 175 } 176 177 /* Compat with pre uid/gid/fsize/dsize mount call */ 178 #define OSIZE sizeof(struct { \ 179 const char *fspec; \ 180 struct export_args30 _pad1; \ 181 int flags; \ 182 }) 183 184 static int 185 iso_checkupdate(const struct vnode *devvp, const struct iso_mnt *imp, 186 const struct iso_args *args) 187 { 188 189 if (devvp != imp->im_devvp && devvp->v_rdev != imp->im_devvp->v_rdev) 190 return EINVAL; 191 192 if (((imp->im_flags & ISOFSMNT_UID) && args->uid != imp->im_uid) || 193 ((imp->im_flags & ISOFSMNT_GID) && args->gid != imp->im_gid) || 194 args->fmask != imp->im_fmask || args->dmask != imp->im_dmask) 195 return EPERM; 196 197 return 0; 198 } 199 200 static void 201 iso_copyidmask(struct iso_args *args, const struct iso_mnt *imp) 202 { 203 204 if (imp == NULL) { 205 args->uid = args->gid = 0; 206 args->fmask = args->dmask = S_IRWXU|S_IRWXG|S_IRWXO; 207 return; 208 } 209 args->uid = imp->im_uid; 210 args->gid = imp->im_gid; 211 args->fmask = imp->im_fmask; 212 args->dmask = imp->im_dmask; 213 } 214 215 int 216 cd9660_mountroot(void) 217 { 218 struct mount *mp; 219 struct lwp *l = curlwp; 220 int error; 221 struct iso_args args; 222 223 if (device_class(root_device) != DV_DISK) 224 return (ENODEV); 225 226 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp)) 227 != 0) { 228 vrele(rootvp); 229 return (error); 230 } 231 232 args.flags = ISOFSMNT_ROOT; 233 iso_copyidmask(&args, NULL); 234 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { 235 vfs_unbusy(mp); 236 vfs_rele(mp); 237 return (error); 238 } 239 mountlist_append(mp); 240 (void)cd9660_statvfs(mp, &mp->mnt_stat); 241 vfs_unbusy(mp); 242 return (0); 243 } 244 245 246 /* 247 * VFS Operations. 248 * 249 * mount system call 250 */ 251 252 int 253 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 254 { 255 struct lwp *l = curlwp; 256 struct vnode *devvp; 257 struct iso_args aa, *args = data; 258 int error; 259 struct iso_mnt *imp = VFSTOISOFS(mp); 260 261 if (args == NULL) 262 return EINVAL; 263 264 if (*data_len != OSIZE && *data_len < sizeof(*args)) 265 return EINVAL; 266 267 if (mp->mnt_flag & MNT_GETARGS) { 268 if (imp == NULL) 269 return EIO; 270 271 args->fspec = NULL; 272 args->flags = imp->im_flags; 273 if (*data_len == OSIZE) 274 return 0; 275 276 iso_copyidmask(args, imp); 277 *data_len = sizeof(*args); 278 return 0; 279 } 280 281 if (*data_len == OSIZE) { 282 memcpy(&aa, args, OSIZE); 283 args = &aa; 284 iso_copyidmask(args, (mp->mnt_flag & MNT_UPDATE) ? imp : NULL); 285 } 286 287 if ((mp->mnt_flag & MNT_RDONLY) == 0) 288 return EROFS; 289 290 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 291 return EINVAL; 292 293 /* 294 * Not an update, or updating the name: look up the name 295 * and verify that it refers to a sensible block device. 296 */ 297 error = namei_simple_user(args->fspec, 298 NSM_FOLLOW_NOEMULROOT, &devvp); 299 if (error != 0) 300 return error; 301 302 if (devvp->v_type != VBLK) { 303 vrele(devvp); 304 return ENOTBLK; 305 } 306 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 307 vrele(devvp); 308 return ENXIO; 309 } 310 /* 311 * If mount by non-root, then verify that user has necessary 312 * permissions on the device. 313 */ 314 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 315 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 316 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); 317 if (error) { 318 goto fail; 319 } 320 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 321 error = VOP_OPEN(devvp, FREAD, FSCRED); 322 if (error) 323 goto fail; 324 VOP_UNLOCK(devvp); 325 error = iso_mountfs(devvp, mp, l, args); 326 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 327 if (error) { 328 (void)VOP_CLOSE(devvp, FREAD, NOCRED); 329 goto fail; 330 } 331 VOP_UNLOCK(devvp); 332 /* reference to devvp is donated through iso_mountfs */ 333 } else { 334 if ((error = iso_checkupdate(devvp, imp, args)) != 0) 335 goto fail; 336 VOP_UNLOCK(devvp); 337 vrele(devvp); 338 } 339 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 340 mp->mnt_op->vfs_name, mp, l); 341 342 fail: 343 VOP_UNLOCK(devvp); 344 vrele(devvp); 345 return error; 346 } 347 348 /* 349 * Make a mount point from a volume descriptor 350 */ 351 static int 352 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) 353 { 354 struct iso_primary_descriptor *pri; 355 int logical_block_size; 356 struct iso_directory_record *rootp; 357 358 pri = (struct iso_primary_descriptor *)bp->b_data; 359 360 logical_block_size = isonum_723 (pri->logical_block_size); 361 362 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 363 || (logical_block_size & (logical_block_size - 1)) != 0) 364 return -1; 365 366 rootp = (struct iso_directory_record *)pri->root_directory_record; 367 368 isomp->logical_block_size = logical_block_size; 369 isomp->volume_space_size = isonum_733 (pri->volume_space_size); 370 memcpy(isomp->root, rootp, sizeof(isomp->root)); 371 isomp->root_extent = isonum_733 (rootp->extent); 372 isomp->root_size = isonum_733 (rootp->size); 373 isomp->im_joliet_level = 0; 374 375 isomp->im_bmask = logical_block_size - 1; 376 isomp->im_bshift = 0; 377 while ((1 << isomp->im_bshift) < isomp->logical_block_size) 378 isomp->im_bshift++; 379 380 if (ea_len != NULL) 381 *ea_len = isonum_711(rootp->ext_attr_length); 382 383 return 0; 384 } 385 386 /* 387 * Common code for mount and mountroot 388 */ 389 static int 390 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, 391 struct iso_args *argp) 392 { 393 struct iso_mnt *isomp = (struct iso_mnt *)0; 394 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; 395 dev_t dev = devvp->v_rdev; 396 int error = EINVAL; 397 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 398 int iso_bsize; 399 int iso_blknum; 400 int joliet_level; 401 struct iso_volume_descriptor *vdp; 402 struct iso_supplementary_descriptor *sup; 403 int sess = 0; 404 int ext_attr_length; 405 struct disklabel label; 406 407 if (!ronly) 408 return EROFS; 409 410 /* Flush out any old buffers remaining from a previous use. */ 411 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 412 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 413 VOP_UNLOCK(devvp); 414 if (error != 0) 415 return (error); 416 417 /* This is the "logical sector size". The standard says this 418 * should be 2048 or the physical sector size on the device, 419 * whichever is greater. For now, we'll just use a constant. 420 */ 421 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 422 423 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); 424 if (!error) { 425 /* XXX more sanity checks? */ 426 sess = label.d_partitions[DISKPART(dev)].p_cdsession; 427 } else { 428 /* fallback to old method */ 429 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); 430 if (error) 431 sess = 0; /* never mind */ 432 } 433 #ifdef ISO_DEBUG 434 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess); 435 #endif 436 437 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { 438 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), 439 iso_bsize, 0, &bp)) != 0) 440 goto out; 441 442 vdp = (struct iso_volume_descriptor *)bp->b_data; 443 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { 444 error = EINVAL; 445 goto out; 446 } 447 448 switch (isonum_711(vdp->type)) { 449 case ISO_VD_PRIMARY: 450 if (pribp == NULL) { 451 pribp = bp; 452 bp = NULL; 453 } 454 break; 455 456 case ISO_VD_SUPPLEMENTARY: 457 if (supbp == NULL) { 458 supbp = bp; 459 bp = NULL; 460 } 461 break; 462 463 default: 464 break; 465 } 466 467 if (isonum_711 (vdp->type) == ISO_VD_END) { 468 brelse(bp, 0); 469 bp = NULL; 470 break; 471 } 472 473 if (bp != NULL) { 474 brelse(bp, 0); 475 bp = NULL; 476 } 477 } 478 479 if (pribp == NULL) { 480 error = EINVAL; 481 goto out; 482 } 483 484 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); 485 memset(isomp, 0, sizeof *isomp); 486 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { 487 error = EINVAL; 488 goto out; 489 } 490 491 isomp->volume_space_size += sess; 492 493 brelse(pribp, BC_AGE); 494 pribp = NULL; 495 496 mp->mnt_data = isomp; 497 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 498 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); 499 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 500 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; 501 mp->mnt_flag |= MNT_LOCAL; 502 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_SHRLOOKUP; 503 mp->mnt_dev_bshift = iso_bsize; 504 mp->mnt_fs_bshift = isomp->im_bshift; 505 isomp->im_mountp = mp; 506 isomp->im_dev = dev; 507 isomp->im_devvp = devvp; 508 509 if (argp->flags & ISOFSMNT_UID) 510 isomp->im_uid = argp->uid; 511 if (argp->flags & ISOFSMNT_GID) 512 isomp->im_gid = argp->gid; 513 isomp->im_fmask = argp->fmask & ACCESSPERMS; 514 isomp->im_dmask = argp->dmask & ACCESSPERMS; 515 516 /* Check the Rock Ridge Extension support */ 517 if (!(argp->flags & ISOFSMNT_NORRIP)) { 518 struct iso_directory_record *rootp; 519 520 if ((error = bread(isomp->im_devvp, 521 (isomp->root_extent + ext_attr_length) << 522 (isomp->im_bshift - DEV_BSHIFT), 523 isomp->logical_block_size, 524 0, &bp)) != 0) 525 goto out; 526 527 rootp = (struct iso_directory_record *)bp->b_data; 528 529 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 530 argp->flags |= ISOFSMNT_NORRIP; 531 } else { 532 argp->flags &= ~ISOFSMNT_GENS; 533 } 534 535 /* 536 * The contents are valid, 537 * but they will get reread as part of another vnode, so... 538 */ 539 brelse(bp, BC_AGE); 540 bp = NULL; 541 } 542 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 543 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS | 544 ISOFSMNT_UID | ISOFSMNT_GID); 545 546 if (isomp->im_flags & ISOFSMNT_GENS) 547 isomp->iso_ftype = ISO_FTYPE_9660; 548 else if (isomp->im_flags & ISOFSMNT_NORRIP) { 549 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 550 if (argp->flags & ISOFSMNT_NOCASETRANS) 551 isomp->im_flags |= ISOFSMNT_NOCASETRANS; 552 } else 553 isomp->iso_ftype = ISO_FTYPE_RRIP; 554 555 /* Check the Joliet Extension support */ 556 if ((argp->flags & ISOFSMNT_NORRIP) != 0 && 557 (argp->flags & ISOFSMNT_NOJOLIET) == 0 && 558 supbp != NULL) { 559 joliet_level = 0; 560 sup = (struct iso_supplementary_descriptor *)supbp->b_data; 561 562 if ((isonum_711(sup->flags) & 1) == 0) { 563 if (memcmp(sup->escape, "%/@", 3) == 0) 564 joliet_level = 1; 565 if (memcmp(sup->escape, "%/C", 3) == 0) 566 joliet_level = 2; 567 if (memcmp(sup->escape, "%/E", 3) == 0) 568 joliet_level = 3; 569 } 570 if (joliet_level != 0) { 571 if (iso_makemp(isomp, supbp, NULL) == -1) { 572 error = EINVAL; 573 goto out; 574 } 575 isomp->im_joliet_level = joliet_level; 576 } 577 } 578 579 if (supbp != NULL) { 580 brelse(supbp, 0); 581 supbp = NULL; 582 } 583 584 spec_node_setmountedfs(devvp, mp); 585 586 return 0; 587 out: 588 if (bp) 589 brelse(bp, 0); 590 if (pribp) 591 brelse(pribp, 0); 592 if (supbp) 593 brelse(supbp, 0); 594 if (isomp) { 595 free(isomp, M_ISOFSMNT); 596 mp->mnt_data = NULL; 597 } 598 return error; 599 } 600 601 /* 602 * Make a filesystem operational. 603 * Nothing to do at the moment. 604 */ 605 /* ARGSUSED */ 606 int 607 cd9660_start(struct mount *mp, int flags) 608 { 609 return 0; 610 } 611 612 /* 613 * unmount system call 614 */ 615 int 616 cd9660_unmount(struct mount *mp, int mntflags) 617 { 618 struct iso_mnt *isomp; 619 int error, flags = 0; 620 621 if (mntflags & MNT_FORCE) 622 flags |= FORCECLOSE; 623 if ((error = vflush(mp, NULLVP, flags)) != 0) 624 return (error); 625 626 isomp = VFSTOISOFS(mp); 627 628 if (isomp->im_devvp->v_type != VBAD) 629 spec_node_setmountedfs(isomp->im_devvp, NULL); 630 631 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); 632 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); 633 vput(isomp->im_devvp); 634 free(isomp, M_ISOFSMNT); 635 mp->mnt_data = NULL; 636 mp->mnt_flag &= ~MNT_LOCAL; 637 return (error); 638 } 639 640 /* 641 * Return root of a filesystem 642 */ 643 int 644 cd9660_root(struct mount *mp, int lktype, struct vnode **vpp) 645 { 646 struct iso_mnt *imp = VFSTOISOFS(mp); 647 struct iso_directory_record *dp = 648 (struct iso_directory_record *)imp->root; 649 ino_t ino = isodirino(dp, imp); 650 651 return cd9660_vget(mp, ino, lktype, vpp); 652 } 653 654 /* 655 * Get file system statistics. 656 */ 657 int 658 cd9660_statvfs(struct mount *mp, struct statvfs *sbp) 659 { 660 struct iso_mnt *isomp; 661 662 isomp = VFSTOISOFS(mp); 663 664 sbp->f_bsize = isomp->logical_block_size; 665 sbp->f_frsize = sbp->f_bsize; 666 sbp->f_iosize = sbp->f_bsize; /* XXX */ 667 sbp->f_blocks = isomp->volume_space_size; 668 sbp->f_bfree = 0; /* total free blocks */ 669 sbp->f_bavail = 0; /* blocks free for non superuser */ 670 sbp->f_bresvd = 0; /* total reserved blocks */ 671 sbp->f_files = 0; /* total files */ 672 sbp->f_ffree = 0; /* free file nodes */ 673 sbp->f_favail = 0; /* free file nodes for non superuser */ 674 sbp->f_fresvd = 0; /* reserved file nodes */ 675 copy_statvfs_info(sbp, mp); 676 /* Use the first spare for flags: */ 677 sbp->f_spare[0] = isomp->im_flags; 678 return 0; 679 } 680 681 /* ARGSUSED */ 682 int 683 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 684 { 685 return 0; 686 } 687 688 /* 689 * File handle to vnode 690 * 691 * Have to be really careful about stale file handles: 692 * - check that the inode number is in range 693 * - call iget() to get the locked inode 694 * - check for an unallocated inode (i_mode == 0) 695 * - check that the generation number matches 696 */ 697 698 struct ifid { 699 ushort ifid_len; 700 ushort ifid_pad; 701 ino_t ifid_ino; 702 #ifdef ISOFS_DBG 703 u_long ifid_start; 704 #endif 705 }; 706 707 /* ARGSUSED */ 708 int 709 cd9660_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 710 { 711 struct ifid ifh; 712 struct iso_node *ip; 713 struct vnode *nvp; 714 int error; 715 716 if (fhp->fid_len != sizeof(ifh)) 717 return EINVAL; 718 719 memcpy(&ifh, fhp, sizeof(ifh)); 720 #ifdef ISOFS_DBG 721 printf("fhtovp: ino %"PRIu64", start %lu\n", 722 ifh.ifid_ino, ifh.ifid_start); 723 #endif 724 725 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 726 *vpp = NULLVP; 727 return (error); 728 } 729 ip = VTOI(nvp); 730 if (ip->inode.iso_mode == 0) { 731 vput(nvp); 732 *vpp = NULLVP; 733 return (ESTALE); 734 } 735 *vpp = nvp; 736 return (0); 737 } 738 739 int 740 cd9660_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 741 { 742 int error; 743 744 error = vcache_get(mp, &ino, sizeof(ino), vpp); 745 if (error) 746 return error; 747 error = vn_lock(*vpp, lktype); 748 if (error) { 749 vrele(*vpp); 750 *vpp = NULL; 751 return error; 752 } 753 return 0; 754 } 755 756 int 757 cd9660_loadvnode(struct mount *mp, struct vnode *vp, 758 const void *key, size_t key_len, const void **new_key) 759 { 760 struct iso_mnt *imp; 761 struct iso_node *ip; 762 struct iso_directory_record *isodir; 763 struct buf *bp; 764 dev_t dev; 765 ino_t ino; 766 int lbn, off; 767 int error; 768 769 KASSERT(key_len == sizeof(ino)); 770 memcpy(&ino, key, key_len); 771 imp = VFSTOISOFS(mp); 772 dev = imp->im_dev; 773 774 ip = pool_get(&cd9660_node_pool, PR_WAITOK); 775 776 memset(ip, 0, sizeof(struct iso_node)); 777 ip->i_vnode = vp; 778 ip->i_dev = dev; 779 ip->i_number = ino; 780 ip->i_mnt = imp; 781 ip->i_devvp = imp->im_devvp; 782 783 lbn = cd9660_lblkno(imp, ino); 784 if (lbn >= imp->volume_space_size) { 785 pool_put(&cd9660_node_pool, ip); 786 printf("fhtovp: lbn exceed volume space %d\n", lbn); 787 return (ESTALE); 788 } 789 790 off = cd9660_blkoff(imp, ino); 791 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 792 pool_put(&cd9660_node_pool, ip); 793 printf("fhtovp: crosses block boundary %d\n", 794 off + ISO_DIRECTORY_RECORD_SIZE); 795 return (ESTALE); 796 } 797 798 error = bread(imp->im_devvp, 799 lbn << (imp->im_bshift - DEV_BSHIFT), 800 imp->logical_block_size, 0, &bp); 801 if (error) { 802 pool_put(&cd9660_node_pool, ip); 803 printf("fhtovp: bread error %d\n",error); 804 return (error); 805 } 806 isodir = (struct iso_directory_record *)((char *)bp->b_data + off); 807 808 if (off + isonum_711(isodir->length) > imp->logical_block_size) { 809 pool_put(&cd9660_node_pool, ip); 810 brelse(bp, 0); 811 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 812 off +isonum_711(isodir->length), off, 813 isonum_711(isodir->length)); 814 return (ESTALE); 815 } 816 817 #if 0 818 if (isonum_733(isodir->extent) + 819 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 820 pool_put(&cd9660_node_pool, ip); 821 if (bp != 0) 822 brelse(bp, 0); 823 printf("fhtovp: file start miss %d vs %d\n", 824 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 825 ifhp->ifid_start); 826 return (ESTALE); 827 } 828 #endif 829 830 ip->iso_extent = isonum_733(isodir->extent); 831 ip->i_size = isonum_733(isodir->size); 832 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 833 834 vp->v_tag = VT_ISOFS; 835 vp->v_op = cd9660_vnodeop_p; 836 vp->v_data = ip; 837 genfs_node_init(vp, &cd9660_genfsops); 838 839 /* 840 * Setup time stamp, attribute 841 */ 842 switch (imp->iso_ftype) { 843 default: /* ISO_FTYPE_9660 */ 844 { 845 struct buf *bp2; 846 if ((imp->im_flags & ISOFSMNT_EXTATT) 847 && (off = isonum_711(isodir->ext_attr_length))) 848 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), 849 NULL, &bp2); 850 else 851 bp2 = NULL; 852 cd9660_defattr(isodir, ip, bp2); 853 cd9660_deftstamp(isodir, ip, bp2); 854 if (bp2) 855 brelse(bp2, 0); 856 break; 857 } 858 case ISO_FTYPE_RRIP: 859 cd9660_rrip_analyze(isodir, ip, imp); 860 break; 861 } 862 863 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 *new_key = &ip->i_number; 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 #ifdef ISOFS_DBG 925 ifh.ifid_start = ip->iso_start; 926 #endif 927 memcpy(fhp, &ifh, sizeof(ifh)); 928 929 #ifdef ISOFS_DBG 930 printf("vptofh: ino %"PRIu64", start %lu\n", 931 ifh.ifid_ino,ifh.ifid_start); 932 #endif 933 return 0; 934 } 935
Indexes created Wed Sep 24 05:09:52 GMT 2025