1 /* $NetBSD: cd9660_vnops.c,v 1.63 2024/02/02 20:27:26 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_vnops.c 8.15 (Berkeley) 5/27/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: cd9660_vnops.c,v 1.63 2024/02/02 20:27:26 christos Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/namei.h> 45 #include <sys/resourcevar.h> 46 #include <sys/kernel.h> 47 #include <sys/file.h> 48 #include <sys/stat.h> 49 #include <sys/buf.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/vnode.h> 53 #include <sys/malloc.h> 54 #include <sys/dirent.h> 55 #include <sys/kauth.h> 56 57 #include <miscfs/fifofs/fifo.h> 58 #include <miscfs/genfs/genfs.h> 59 #include <miscfs/specfs/specdev.h> 60 61 #include <fs/cd9660/iso.h> 62 #include <fs/cd9660/cd9660_extern.h> 63 #include <fs/cd9660/cd9660_node.h> 64 #include <fs/cd9660/cd9660_mount.h> 65 #include <fs/cd9660/iso_rrip.h> 66 #include <fs/cd9660/cd9660_mount.h> 67 68 /* 69 * Structure for reading directories 70 */ 71 struct isoreaddir { 72 struct dirent saveent; 73 struct dirent assocent; 74 struct dirent current; 75 off_t saveoff; 76 off_t assocoff; 77 off_t curroff; 78 struct uio *uio; 79 off_t uio_off; 80 int eofflag; 81 off_t *cookies; 82 int ncookies; 83 }; 84 85 int iso_uiodir(struct isoreaddir *, struct dirent *, off_t); 86 int iso_shipdir(struct isoreaddir *); 87 88 static int 89 cd9660_check_possible(struct vnode *vp, struct iso_node *ip, accmode_t accmode) 90 { 91 92 /* 93 * Disallow write attempts unless the file is a socket, 94 * fifo, or a block or character device resident on the 95 * file system. 96 */ 97 if (accmode & VWRITE) { 98 switch (vp->v_type) { 99 case VDIR: 100 case VLNK: 101 case VREG: 102 return (EROFS); 103 default: 104 break; 105 } 106 } 107 108 return 0; 109 } 110 111 /* 112 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 113 * The mode is shifted to select the owner/group/other fields. The 114 * super user is granted all permissions. 115 */ 116 static int 117 cd9660_check_permitted(struct vnode *vp, struct iso_node *ip, accmode_t accmode, 118 kauth_cred_t cred) 119 { 120 accmode_t file_mode; 121 uid_t uid; 122 gid_t gid; 123 124 file_mode = ip->inode.iso_mode & ALLPERMS; 125 file_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask; 126 127 uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ? 128 ip->i_mnt->im_uid : ip->inode.iso_uid; 129 gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ? 130 ip->i_mnt->im_gid : ip->inode.iso_gid; 131 132 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 133 vp->v_type, file_mode), vp, NULL, 134 genfs_can_access(vp, cred, uid, gid, 135 file_mode, NULL, accmode)); 136 } 137 138 int 139 cd9660_access(void *v) 140 { 141 struct vop_access_args /* { 142 struct vnode *a_vp; 143 accmode_t a_accmode; 144 kauth_cred_t a_cred; 145 } */ *ap = v; 146 struct vnode *vp = ap->a_vp; 147 struct iso_node *ip = VTOI(vp); 148 int error; 149 150 error = cd9660_check_possible(vp, ip, ap->a_accmode); 151 if (error) 152 return error; 153 154 error = cd9660_check_permitted(vp, ip, ap->a_accmode, ap->a_cred); 155 156 return error; 157 } 158 159 int 160 cd9660_getattr(void *v) 161 { 162 struct vop_getattr_args /* { 163 struct vnode *a_vp; 164 struct vattr *a_vap; 165 kauth_cred_t a_cred; 166 } */ *ap = v; 167 struct vnode *vp = ap->a_vp; 168 struct iso_node *ip = VTOI(vp); 169 struct vattr *vap = ap->a_vap; 170 171 vap->va_fsid = ip->i_dev; 172 vap->va_fileid = ip->i_number; 173 174 vap->va_mode = ip->inode.iso_mode & ALLPERMS; 175 vap->va_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask; 176 vap->va_nlink = ip->inode.iso_links; 177 vap->va_uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ? 178 ip->i_mnt->im_uid : ip->inode.iso_uid; 179 vap->va_gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ? 180 ip->i_mnt->im_gid : ip->inode.iso_gid; 181 vap->va_atime = ip->inode.iso_atime; 182 vap->va_mtime = ip->inode.iso_mtime; 183 vap->va_ctime = ip->inode.iso_ctime; 184 vap->va_rdev = ip->inode.iso_rdev; 185 186 vap->va_size = (u_quad_t) ip->i_size; 187 if (ip->i_size == 0 && vp->v_type == VLNK) { 188 struct vop_readlink_args rdlnk; 189 struct iovec aiov; 190 struct uio auio; 191 char *cp; 192 193 cp = (char *)malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 194 aiov.iov_base = cp; 195 aiov.iov_len = MAXPATHLEN; 196 auio.uio_iov = &aiov; 197 auio.uio_iovcnt = 1; 198 auio.uio_offset = 0; 199 auio.uio_rw = UIO_READ; 200 auio.uio_resid = MAXPATHLEN; 201 UIO_SETUP_SYSSPACE(&auio); 202 rdlnk.a_uio = &auio; 203 rdlnk.a_vp = ap->a_vp; 204 rdlnk.a_cred = ap->a_cred; 205 if (cd9660_readlink(&rdlnk) == 0) 206 vap->va_size = MAXPATHLEN - auio.uio_resid; 207 free(cp, M_TEMP); 208 } 209 vap->va_flags = 0; 210 vap->va_gen = 1; 211 vap->va_blocksize = ip->i_mnt->logical_block_size; 212 vap->va_bytes = (u_quad_t) ip->i_size; 213 vap->va_type = vp->v_type; 214 return (0); 215 } 216 217 /* 218 * Vnode op for reading. 219 */ 220 int 221 cd9660_read(void *v) 222 { 223 struct vop_read_args /* { 224 struct vnode *a_vp; 225 struct uio *a_uio; 226 int a_ioflag; 227 kauth_cred_t a_cred; 228 } */ *ap = v; 229 struct vnode *vp = ap->a_vp; 230 struct uio *uio = ap->a_uio; 231 struct iso_node *ip = VTOI(vp); 232 struct iso_mnt *imp; 233 struct buf *bp; 234 daddr_t lbn, rablock; 235 off_t diff; 236 int rasize, error = 0; 237 long size, n, on; 238 239 if (uio->uio_resid == 0) 240 return (0); 241 if (uio->uio_offset < 0) 242 return (EINVAL); 243 if (uio->uio_offset >= ip->i_size) 244 return 0; 245 ip->i_flag |= IN_ACCESS; 246 imp = ip->i_mnt; 247 248 if (vp->v_type == VREG) { 249 const int advice = IO_ADV_DECODE(ap->a_ioflag); 250 error = 0; 251 252 while (uio->uio_resid > 0) { 253 vsize_t bytelen = MIN(ip->i_size - uio->uio_offset, 254 uio->uio_resid); 255 256 if (bytelen == 0) 257 break; 258 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 259 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 260 if (error) 261 break; 262 } 263 goto out; 264 } 265 266 do { 267 lbn = cd9660_lblkno(imp, uio->uio_offset); 268 on = cd9660_blkoff(imp, uio->uio_offset); 269 n = MIN(imp->logical_block_size - on, uio->uio_resid); 270 diff = (off_t)ip->i_size - uio->uio_offset; 271 if (diff <= 0) 272 return (0); 273 if (diff < n) 274 n = diff; 275 size = cd9660_blksize(imp, ip, lbn); 276 rablock = lbn + 1; 277 if (cd9660_lblktosize(imp, rablock) < ip->i_size) { 278 rasize = cd9660_blksize(imp, ip, rablock); 279 error = breadn(vp, lbn, size, &rablock, 280 &rasize, 1, 0, &bp); 281 } else { 282 error = bread(vp, lbn, size, 0, &bp); 283 } 284 if (error) { 285 return (error); 286 } 287 n = MIN(n, size - bp->b_resid); 288 289 error = uiomove((char *)bp->b_data + on, (int)n, uio); 290 brelse(bp, 0); 291 } while (error == 0 && uio->uio_resid > 0 && n != 0); 292 293 out: 294 return (error); 295 } 296 297 int 298 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 299 { 300 int error; 301 302 dp->d_name[dp->d_namlen] = 0; 303 dp->d_reclen = _DIRENT_SIZE(dp); 304 305 if (idp->uio->uio_resid < dp->d_reclen) { 306 idp->eofflag = 0; 307 return (-1); 308 } 309 310 if (idp->cookies) { 311 if (idp->ncookies <= 0) { 312 idp->eofflag = 0; 313 return (-1); 314 } 315 316 *idp->cookies++ = off; 317 --idp->ncookies; 318 } 319 320 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 321 return (error); 322 idp->uio_off = off; 323 return (0); 324 } 325 326 int 327 iso_shipdir(struct isoreaddir *idp) 328 { 329 struct dirent *dp; 330 int cl, sl, assoc; 331 int error; 332 char *cname, *sname; 333 334 cl = idp->current.d_namlen; 335 cname = idp->current.d_name; 336 337 assoc = (cl > 1) && (*cname == ASSOCCHAR); 338 if (assoc) { 339 cl--; 340 cname++; 341 } 342 343 dp = &idp->saveent; 344 sname = dp->d_name; 345 if (!(sl = dp->d_namlen)) { 346 dp = &idp->assocent; 347 sname = dp->d_name + 1; 348 sl = dp->d_namlen - 1; 349 } 350 if (sl > 0) { 351 if (sl != cl 352 || memcmp(sname, cname, sl)) { 353 if (idp->assocent.d_namlen) { 354 error = iso_uiodir(idp, &idp->assocent, 355 idp->assocoff); 356 if (error) 357 return (error); 358 idp->assocent.d_namlen = 0; 359 } 360 if (idp->saveent.d_namlen) { 361 error = iso_uiodir(idp, &idp->saveent, 362 idp->saveoff); 363 if (error) 364 return (error); 365 idp->saveent.d_namlen = 0; 366 } 367 } 368 } 369 idp->current.d_reclen = _DIRENT_SIZE(&idp->current); 370 if (assoc) { 371 idp->assocoff = idp->curroff; 372 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 373 } else { 374 idp->saveoff = idp->curroff; 375 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 376 } 377 return (0); 378 } 379 380 /* 381 * Vnode op for readdir 382 */ 383 int 384 cd9660_readdir(void *v) 385 { 386 struct vop_readdir_args /* { 387 struct vnode *a_vp; 388 struct uio *a_uio; 389 kauth_cred_t a_cred; 390 int *a_eofflag; 391 off_t **a_cookies; 392 int *a_ncookies; 393 } */ *ap = v; 394 struct uio *uio = ap->a_uio; 395 struct isoreaddir *idp; 396 struct vnode *vdp = ap->a_vp; 397 struct iso_node *dp; 398 struct iso_mnt *imp; 399 struct buf *bp = NULL; 400 struct iso_directory_record *ep; 401 int entryoffsetinblock; 402 doff_t endsearch; 403 u_long bmask; 404 int error = 0; 405 int reclen; 406 u_short namelen; 407 off_t *cookies = NULL; 408 int ncookies = 0; 409 410 if (vdp->v_type != VDIR) 411 return (ENOTDIR); 412 413 dp = VTOI(vdp); 414 imp = dp->i_mnt; 415 bmask = imp->im_bmask; 416 417 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK | M_ZERO); 418 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 419 /* 420 * XXX 421 * Is it worth trying to figure out the type? 422 */ 423 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 424 DT_UNKNOWN; 425 idp->uio = uio; 426 if (ap->a_ncookies == NULL) 427 idp->cookies = NULL; 428 else { 429 ncookies = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 430 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 431 idp->cookies = cookies; 432 idp->ncookies = ncookies; 433 } 434 idp->eofflag = 1; 435 idp->curroff = uio->uio_offset; 436 437 if ((entryoffsetinblock = idp->curroff & bmask) && 438 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 439 free(idp, M_TEMP); 440 return (error); 441 } 442 endsearch = dp->i_size; 443 444 while (idp->curroff < endsearch) { 445 /* 446 * If offset is on a block boundary, 447 * read the next directory block. 448 * Release previous if it exists. 449 */ 450 if ((idp->curroff & bmask) == 0) { 451 if (bp != NULL) 452 brelse(bp, 0); 453 error = cd9660_blkatoff(vdp, (off_t)idp->curroff, 454 NULL, &bp); 455 if (error) 456 break; 457 entryoffsetinblock = 0; 458 } 459 /* 460 * Get pointer to next entry. 461 */ 462 KASSERT(bp != NULL); 463 ep = (struct iso_directory_record *) 464 ((char *)bp->b_data + entryoffsetinblock); 465 466 reclen = isonum_711(ep->length); 467 if (reclen == 0) { 468 /* skip to next block, if any */ 469 idp->curroff = 470 (idp->curroff & ~bmask) + imp->logical_block_size; 471 continue; 472 } 473 474 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 475 error = EINVAL; 476 /* illegal entry, stop */ 477 break; 478 } 479 480 if (entryoffsetinblock + reclen > imp->logical_block_size) { 481 error = EINVAL; 482 /* illegal directory, so stop looking */ 483 break; 484 } 485 486 idp->current.d_namlen = isonum_711(ep->name_len); 487 488 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 489 error = EINVAL; 490 /* illegal entry, stop */ 491 break; 492 } 493 494 if (isonum_711(ep->flags)&2) 495 idp->current.d_fileno = isodirino(ep, imp); 496 else 497 idp->current.d_fileno = dbtob(bp->b_blkno) + 498 entryoffsetinblock; 499 500 idp->curroff += reclen; 501 502 switch (imp->iso_ftype) { 503 case ISO_FTYPE_RRIP: 504 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 505 &idp->current.d_fileno, imp); 506 idp->current.d_namlen = (u_char)namelen; 507 if (idp->current.d_namlen) 508 error = iso_uiodir(idp, &idp->current, 509 idp->curroff); 510 break; 511 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */ 512 isofntrans(ep->name, idp->current.d_namlen, 513 idp->current.d_name, &namelen, 514 imp->iso_ftype == ISO_FTYPE_9660, 515 (imp->im_flags & ISOFSMNT_NOCASETRANS) == 0, 516 isonum_711(ep->flags)&4, 517 imp->im_joliet_level); 518 switch (idp->current.d_name[0]) { 519 case 0: 520 idp->current.d_name[0] = '.'; 521 idp->current.d_namlen = 1; 522 error = iso_uiodir(idp, &idp->current, 523 idp->curroff); 524 break; 525 case 1: 526 strlcpy(idp->current.d_name, "..", 527 sizeof(idp->current.d_name)); 528 idp->current.d_namlen = 2; 529 error = iso_uiodir(idp, &idp->current, 530 idp->curroff); 531 break; 532 default: 533 idp->current.d_namlen = (u_char)namelen; 534 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 535 error = iso_shipdir(idp); 536 else 537 error = iso_uiodir(idp, &idp->current, 538 idp->curroff); 539 break; 540 } 541 } 542 if (error) 543 break; 544 545 entryoffsetinblock += reclen; 546 } 547 548 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 549 idp->current.d_namlen = 0; 550 error = iso_shipdir(idp); 551 } 552 if (error < 0) 553 error = 0; 554 555 if (ap->a_ncookies != NULL) { 556 if (error) 557 free(cookies, M_TEMP); 558 else { 559 /* 560 * Work out the number of cookies actually used. 561 */ 562 *ap->a_ncookies = ncookies - idp->ncookies; 563 *ap->a_cookies = cookies; 564 } 565 } 566 567 if (bp) 568 brelse(bp, 0); 569 570 uio->uio_offset = idp->uio_off; 571 *ap->a_eofflag = idp->eofflag; 572 573 free(idp, M_TEMP); 574 575 return (error); 576 } 577 578 /* 579 * Return target name of a symbolic link 580 * Shouldn't we get the parent vnode and read the data from there? 581 * This could eventually result in deadlocks in cd9660_lookup. 582 * But otherwise the block read here is in the block buffer two times. 583 */ 584 typedef struct iso_directory_record ISODIR; 585 typedef struct iso_node ISONODE; 586 typedef struct iso_mnt ISOMNT; 587 588 int 589 cd9660_readlink(void *v) 590 { 591 struct vop_readlink_args /* { 592 struct vnode *a_vp; 593 struct uio *a_uio; 594 kauth_cred_t a_cred; 595 } */ *ap = v; 596 ISONODE *ip; 597 ISODIR *dirp; 598 ISOMNT *imp; 599 struct buf *bp; 600 struct uio *uio; 601 u_short symlen; 602 int error; 603 char *symname; 604 bool use_pnbuf; 605 606 ip = VTOI(ap->a_vp); 607 imp = ip->i_mnt; 608 uio = ap->a_uio; 609 610 if (imp->iso_ftype != ISO_FTYPE_RRIP) 611 return (EINVAL); 612 613 /* 614 * Get parents directory record block that this inode included. 615 */ 616 error = bread(imp->im_devvp, 617 (ip->i_number >> imp->im_bshift) << 618 (imp->im_bshift - DEV_BSHIFT), 619 imp->logical_block_size, 0, &bp); 620 if (error) { 621 return (EINVAL); 622 } 623 624 /* 625 * Setup the directory pointer for this inode 626 */ 627 dirp = (ISODIR *)((char *)bp->b_data + (ip->i_number & imp->im_bmask)); 628 629 /* 630 * Just make sure, we have a right one.... 631 * 1: Check not cross boundary on block 632 */ 633 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 634 > imp->logical_block_size) { 635 brelse(bp, 0); 636 return (EINVAL); 637 } 638 639 /* 640 * Now get a buffer 641 * Abuse a namei buffer for now. 642 */ 643 use_pnbuf = !VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || 644 uio->uio_iov->iov_len < MAXPATHLEN; 645 if (use_pnbuf) { 646 symname = PNBUF_GET(); 647 } else { 648 symname = uio->uio_iov->iov_base; 649 } 650 651 /* 652 * Ok, we just gathering a symbolic name in SL record. 653 */ 654 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 655 if (use_pnbuf) { 656 PNBUF_PUT(symname); 657 } 658 brelse(bp, 0); 659 return (EINVAL); 660 } 661 /* 662 * Don't forget before you leave from home ;-) 663 */ 664 brelse(bp, 0); 665 666 /* 667 * return with the symbolic name to caller's. 668 */ 669 if (use_pnbuf) { 670 error = uiomove(symname, symlen, uio); 671 PNBUF_PUT(symname); 672 return (error); 673 } 674 uio->uio_resid -= symlen; 675 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 676 uio->uio_iov->iov_len -= symlen; 677 return (0); 678 } 679 680 /* 681 * Calculate the logical to physical mapping if not done already, 682 * then call the device strategy routine. 683 */ 684 int 685 cd9660_strategy(void *v) 686 { 687 struct vop_strategy_args /* { 688 struct vnode *a_vp; 689 struct buf *a_bp; 690 } */ *ap = v; 691 struct buf *bp = ap->a_bp; 692 struct vnode *vp = ap->a_vp; 693 struct iso_node *ip; 694 int error; 695 696 ip = VTOI(vp); 697 if (vp->v_type == VBLK || vp->v_type == VCHR) 698 panic("cd9660_strategy: spec"); 699 if (bp->b_blkno == bp->b_lblkno) { 700 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 701 if (error) { 702 bp->b_error = error; 703 biodone(bp); 704 return (error); 705 } 706 if ((long)bp->b_blkno == -1) 707 clrbuf(bp); 708 } 709 if ((long)bp->b_blkno == -1) { 710 biodone(bp); 711 return (0); 712 } 713 vp = ip->i_mnt->im_devvp; 714 return (VOP_STRATEGY(vp, bp)); 715 } 716 717 /* 718 * Print out the contents of an inode. 719 */ 720 /*ARGSUSED*/ 721 int 722 cd9660_print(void *v) 723 { 724 725 printf("tag VT_ISOFS, isofs vnode\n"); 726 return (0); 727 } 728 729 /* 730 * Return POSIX pathconf information applicable to cd9660 filesystems. 731 */ 732 int 733 cd9660_pathconf(void *v) 734 { 735 struct vop_pathconf_args /* { 736 struct vnode *a_vp; 737 int a_name; 738 register_t *a_retval; 739 } */ *ap = v; 740 switch (ap->a_name) { 741 case _PC_LINK_MAX: 742 *ap->a_retval = 1; 743 return (0); 744 case _PC_NAME_MAX: 745 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 746 *ap->a_retval = ISO_MAXNAMLEN; 747 else 748 *ap->a_retval = 37; 749 return (0); 750 case _PC_PATH_MAX: 751 *ap->a_retval = PATH_MAX; 752 return (0); 753 case _PC_PIPE_BUF: 754 *ap->a_retval = PIPE_BUF; 755 return (0); 756 case _PC_CHOWN_RESTRICTED: 757 *ap->a_retval = 1; 758 return (0); 759 case _PC_NO_TRUNC: 760 *ap->a_retval = 1; 761 return (0); 762 case _PC_SYNC_IO: 763 *ap->a_retval = 1; 764 return (0); 765 case _PC_FILESIZEBITS: 766 *ap->a_retval = 32; 767 return (0); 768 default: 769 return genfs_pathconf(ap); 770 } 771 /* NOTREACHED */ 772 } 773 774 /* 775 * Allow changing the size for special files (and fifos). 776 */ 777 int 778 cd9660_setattr(void *v) 779 { 780 struct vop_setattr_args /* { 781 struct vnodeop_desc *a_desc; 782 struct vnode *a_vp; 783 struct vattr *a_vap; 784 kauth_cred_t a_cred; 785 struct proc *a_p; 786 } */ *ap = v; 787 struct vattr *vap = ap->a_vap; 788 struct vnode *vp = ap->a_vp; 789 790 /* 791 * Only size is changeable. 792 */ 793 if (vap->va_type != VNON 794 || vap->va_nlink != (nlink_t)VNOVAL 795 || vap->va_fsid != VNOVAL 796 || vap->va_fileid != VNOVAL 797 || vap->va_blocksize != VNOVAL 798 || vap->va_rdev != (dev_t)VNOVAL 799 || (int)vap->va_bytes != VNOVAL 800 || vap->va_gen != VNOVAL 801 || vap->va_flags != VNOVAL 802 || vap->va_uid != (uid_t)VNOVAL 803 || vap->va_gid != (gid_t)VNOVAL 804 || vap->va_atime.tv_sec != VNOVAL 805 || vap->va_mtime.tv_sec != VNOVAL 806 || vap->va_mode != (mode_t)VNOVAL) 807 return EOPNOTSUPP; 808 809 if (vap->va_size != VNOVAL 810 && vp->v_type != VCHR 811 && vp->v_type != VBLK 812 && vp->v_type != VFIFO) 813 return EOPNOTSUPP; 814 815 return 0; 816 } 817 818 /* 819 * Global vfs data structures for cd9660 820 */ 821 int (**cd9660_vnodeop_p)(void *); 822 const struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = { 823 { &vop_default_desc, vn_default_error }, 824 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 825 { &vop_lookup_desc, cd9660_lookup }, /* lookup */ 826 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 827 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 828 { &vop_open_desc, genfs_nullop }, /* open */ 829 { &vop_close_desc, genfs_nullop }, /* close */ 830 { &vop_access_desc, cd9660_access }, /* access */ 831 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 832 { &vop_getattr_desc, cd9660_getattr }, /* getattr */ 833 { &vop_setattr_desc, cd9660_setattr }, /* setattr */ 834 { &vop_read_desc, cd9660_read }, /* read */ 835 { &vop_write_desc, genfs_eopnotsupp }, /* write */ 836 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 837 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 838 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 839 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 840 { &vop_poll_desc, genfs_poll }, /* poll */ 841 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 842 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 843 { &vop_fsync_desc, genfs_nullop }, /* fsync */ 844 { &vop_seek_desc, genfs_seek }, /* seek */ 845 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 846 { &vop_link_desc, genfs_erofs_link }, /* link */ 847 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 848 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 849 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 850 { &vop_symlink_desc, genfs_erofs_symlink }, /* symlink */ 851 { &vop_readdir_desc, cd9660_readdir }, /* readdir */ 852 { &vop_readlink_desc, cd9660_readlink }, /* readlink */ 853 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 854 { &vop_inactive_desc, cd9660_inactive }, /* inactive */ 855 { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ 856 { &vop_lock_desc, genfs_lock }, /* lock */ 857 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 858 { &vop_bmap_desc, cd9660_bmap }, /* bmap */ 859 { &vop_strategy_desc, cd9660_strategy }, /* strategy */ 860 { &vop_print_desc, cd9660_print }, /* print */ 861 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 862 { &vop_pathconf_desc, cd9660_pathconf }, /* pathconf */ 863 { &vop_advlock_desc, genfs_einval }, /* advlock */ 864 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 865 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 866 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 867 { NULL, NULL } 868 }; 869 const struct vnodeopv_desc cd9660_vnodeop_opv_desc = 870 { &cd9660_vnodeop_p, cd9660_vnodeop_entries }; 871 872 /* 873 * Special device vnode ops 874 */ 875 int (**cd9660_specop_p)(void *); 876 const struct vnodeopv_entry_desc cd9660_specop_entries[] = { 877 { &vop_default_desc, vn_default_error }, 878 GENFS_SPECOP_ENTRIES, 879 { &vop_close_desc, spec_close }, /* close */ 880 { &vop_access_desc, cd9660_access }, /* access */ 881 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 882 { &vop_getattr_desc, cd9660_getattr }, /* getattr */ 883 { &vop_setattr_desc, cd9660_setattr }, /* setattr */ 884 { &vop_read_desc, spec_read }, /* read */ 885 { &vop_write_desc, spec_write }, /* write */ 886 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 887 { &vop_fsync_desc, spec_fsync }, /* fsync */ 888 { &vop_inactive_desc, cd9660_inactive }, /* inactive */ 889 { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ 890 { &vop_lock_desc, genfs_lock }, /* lock */ 891 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 892 { &vop_print_desc, cd9660_print }, /* print */ 893 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 894 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 895 { NULL, NULL } 896 }; 897 const struct vnodeopv_desc cd9660_specop_opv_desc = 898 { &cd9660_specop_p, cd9660_specop_entries }; 899 900 int (**cd9660_fifoop_p)(void *); 901 const struct vnodeopv_entry_desc cd9660_fifoop_entries[] = { 902 { &vop_default_desc, vn_default_error }, 903 GENFS_FIFOOP_ENTRIES, 904 { &vop_close_desc, vn_fifo_bypass }, /* close */ 905 { &vop_access_desc, cd9660_access }, /* access */ 906 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 907 { &vop_getattr_desc, cd9660_getattr }, /* getattr */ 908 { &vop_setattr_desc, cd9660_setattr }, /* setattr */ 909 { &vop_read_desc, vn_fifo_bypass }, /* read */ 910 { &vop_write_desc, vn_fifo_bypass }, /* write */ 911 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 912 { &vop_fsync_desc, vn_fifo_bypass }, /* fsync */ 913 { &vop_inactive_desc, cd9660_inactive }, /* inactive */ 914 { &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */ 915 { &vop_lock_desc, genfs_lock }, /* lock */ 916 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 917 { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */ 918 { &vop_print_desc, cd9660_print }, /* print */ 919 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 920 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 921 { NULL, NULL } 922 }; 923 const struct vnodeopv_desc cd9660_fifoop_opv_desc = 924 { &cd9660_fifoop_p, cd9660_fifoop_entries }; 925
Indexes created Sun Sep 21 18:09:52 GMT 2025