1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@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 37 #include <sys/cdefs.h> 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/namei.h> 41 #include <sys/kernel.h> 42 #include <sys/conf.h> 43 #include <sys/stat.h> 44 #include <sys/bio.h> 45 #include <sys/buf.h> 46 #include <sys/mount.h> 47 #include <sys/vnode.h> 48 #include <sys/malloc.h> 49 #include <sys/dirent.h> 50 #include <sys/unistd.h> 51 #include <sys/filio.h> 52 #include <sys/sysctl.h> 53 54 #include <vm/vm.h> 55 #include <vm/vnode_pager.h> 56 #include <vm/uma.h> 57 58 #include <fs/cd9660/iso.h> 59 #include <fs/cd9660/cd9660_node.h> 60 #include <fs/cd9660/iso_rrip.h> 61 62 static vop_setattr_t cd9660_setattr; 63 static vop_open_t cd9660_open; 64 static vop_access_t cd9660_access; 65 static vop_getattr_t cd9660_getattr; 66 static vop_ioctl_t cd9660_ioctl; 67 static vop_pathconf_t cd9660_pathconf; 68 static vop_read_t cd9660_read; 69 struct isoreaddir; 70 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off); 71 static int iso_shipdir(struct isoreaddir *idp); 72 static vop_readdir_t cd9660_readdir; 73 static vop_readlink_t cd9660_readlink; 74 static vop_strategy_t cd9660_strategy; 75 static vop_vptofh_t cd9660_vptofh; 76 static vop_getpages_t cd9660_getpages; 77 78 /* 79 * Setattr call. Only allowed for block and character special devices. 80 */ 81 static int 82 cd9660_setattr(struct vop_setattr_args *ap) 83 { 84 struct vnode *vp = ap->a_vp; 85 struct vattr *vap = ap->a_vap; 86 87 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 88 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 89 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 90 return (EROFS); 91 if (vap->va_size != (u_quad_t)VNOVAL) { 92 switch (vp->v_type) { 93 case VDIR: 94 return (EISDIR); 95 case VLNK: 96 case VREG: 97 return (EROFS); 98 case VCHR: 99 case VBLK: 100 case VSOCK: 101 case VFIFO: 102 case VNON: 103 case VBAD: 104 case VMARKER: 105 return (0); 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 /* ARGSUSED */ 117 static int 118 cd9660_access(struct vop_access_args *ap) 119 { 120 struct vnode *vp = ap->a_vp; 121 struct iso_node *ip = VTOI(vp); 122 accmode_t accmode = ap->a_accmode; 123 124 if (vp->v_type == VCHR || vp->v_type == VBLK) 125 return (EOPNOTSUPP); 126 127 /* 128 * Disallow write attempts unless the file is a socket, 129 * fifo, or a block or character device resident on the 130 * filesystem. 131 */ 132 if (accmode & VWRITE) { 133 switch (vp->v_type) { 134 case VDIR: 135 case VLNK: 136 case VREG: 137 return (EROFS); 138 /* NOT REACHED */ 139 default: 140 break; 141 } 142 } 143 144 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 145 ip->inode.iso_gid, ap->a_accmode, ap->a_cred)); 146 } 147 148 static int 149 cd9660_open(struct vop_open_args *ap) 150 { 151 struct vnode *vp = ap->a_vp; 152 struct iso_node *ip = VTOI(vp); 153 154 if (vp->v_type == VCHR || vp->v_type == VBLK) 155 return (EOPNOTSUPP); 156 157 vnode_create_vobject(vp, ip->i_size, ap->a_td); 158 return (0); 159 } 160 161 static int 162 cd9660_getattr(struct vop_getattr_args *ap) 163 164 { 165 struct vnode *vp = ap->a_vp; 166 struct vattr *vap = ap->a_vap; 167 struct iso_node *ip = VTOI(vp); 168 169 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 170 vap->va_fileid = ip->i_number; 171 172 vap->va_mode = ip->inode.iso_mode; 173 vap->va_nlink = ip->inode.iso_links; 174 vap->va_uid = ip->inode.iso_uid; 175 vap->va_gid = ip->inode.iso_gid; 176 vap->va_atime = ip->inode.iso_atime; 177 vap->va_mtime = ip->inode.iso_mtime; 178 vap->va_ctime = ip->inode.iso_ctime; 179 vap->va_rdev = ip->inode.iso_rdev; 180 181 vap->va_size = (u_quad_t) ip->i_size; 182 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 183 struct vop_readlink_args rdlnk; 184 struct iovec aiov; 185 struct uio auio; 186 char *cp; 187 188 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 189 aiov.iov_base = cp; 190 aiov.iov_len = MAXPATHLEN; 191 auio.uio_iov = &aiov; 192 auio.uio_iovcnt = 1; 193 auio.uio_offset = 0; 194 auio.uio_rw = UIO_READ; 195 auio.uio_segflg = UIO_SYSSPACE; 196 auio.uio_td = curthread; 197 auio.uio_resid = MAXPATHLEN; 198 rdlnk.a_uio = &auio; 199 rdlnk.a_vp = ap->a_vp; 200 rdlnk.a_cred = ap->a_cred; 201 if (cd9660_readlink(&rdlnk) == 0) 202 vap->va_size = MAXPATHLEN - auio.uio_resid; 203 free(cp, M_TEMP); 204 } 205 vap->va_flags = 0; 206 vap->va_gen = 1; 207 vap->va_blocksize = ip->i_mnt->logical_block_size; 208 vap->va_bytes = (u_quad_t) ip->i_size; 209 vap->va_type = vp->v_type; 210 vap->va_filerev = 0; 211 return (0); 212 } 213 214 /* 215 * Vnode op for ioctl. 216 */ 217 static int 218 cd9660_ioctl(struct vop_ioctl_args *ap) 219 { 220 struct vnode *vp; 221 struct iso_node *ip; 222 int error; 223 224 vp = ap->a_vp; 225 vn_lock(vp, LK_SHARED | LK_RETRY); 226 if (VN_IS_DOOMED(vp)) { 227 VOP_UNLOCK(vp); 228 return (EBADF); 229 } 230 if (vp->v_type == VCHR || vp->v_type == VBLK) { 231 VOP_UNLOCK(vp); 232 return (EOPNOTSUPP); 233 } 234 235 ip = VTOI(vp); 236 error = 0; 237 238 switch (ap->a_command) { 239 case FIOGETLBA: 240 *(int *)(ap->a_data) = ip->iso_start; 241 break; 242 default: 243 error = ENOTTY; 244 break; 245 } 246 247 VOP_UNLOCK(vp); 248 return (error); 249 } 250 251 /* 252 * Vnode op for reading. 253 */ 254 static int 255 cd9660_read(struct vop_read_args *ap) 256 { 257 struct vnode *vp = ap->a_vp; 258 struct uio *uio = ap->a_uio; 259 struct iso_node *ip = VTOI(vp); 260 struct iso_mnt *imp; 261 struct buf *bp; 262 daddr_t lbn, rablock; 263 off_t diff; 264 int rasize, error = 0; 265 int seqcount; 266 long size, n, on; 267 268 if (vp->v_type == VCHR || vp->v_type == VBLK) 269 return (EOPNOTSUPP); 270 271 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 272 273 if (uio->uio_resid == 0) 274 return (0); 275 if (uio->uio_offset < 0) 276 return (EINVAL); 277 imp = ip->i_mnt; 278 do { 279 lbn = lblkno(imp, uio->uio_offset); 280 on = blkoff(imp, uio->uio_offset); 281 n = MIN(imp->logical_block_size - on, uio->uio_resid); 282 diff = (off_t)ip->i_size - uio->uio_offset; 283 if (diff <= 0) 284 return (0); 285 if (diff < n) 286 n = diff; 287 size = blksize(imp, ip, lbn); 288 rablock = lbn + 1; 289 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 290 if (lblktosize(imp, rablock) < ip->i_size) 291 error = cluster_read(vp, (off_t)ip->i_size, 292 lbn, size, NOCRED, uio->uio_resid, 293 (ap->a_ioflag >> 16), 0, &bp); 294 else 295 error = bread(vp, lbn, size, NOCRED, &bp); 296 } else { 297 if (seqcount > 1 && 298 lblktosize(imp, rablock) < ip->i_size) { 299 rasize = blksize(imp, ip, rablock); 300 error = breadn(vp, lbn, size, &rablock, 301 &rasize, 1, NOCRED, &bp); 302 } else 303 error = bread(vp, lbn, size, NOCRED, &bp); 304 } 305 if (error != 0) 306 return (error); 307 n = MIN(n, size - bp->b_resid); 308 309 error = uiomove(bp->b_data + on, (int)n, uio); 310 brelse(bp); 311 } while (error == 0 && uio->uio_resid > 0 && n != 0); 312 return (error); 313 } 314 315 /* 316 * Structure for reading directories 317 */ 318 struct isoreaddir { 319 struct dirent saveent; 320 struct dirent assocent; 321 struct dirent current; 322 off_t saveoff; 323 off_t assocoff; 324 off_t curroff; 325 struct uio *uio; 326 off_t uio_off; 327 int eofflag; 328 uint64_t *cookies; 329 int ncookies; 330 }; 331 332 static int 333 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 334 { 335 int error; 336 337 dp->d_reclen = GENERIC_DIRSIZ(dp); 338 dirent_terminate(dp); 339 340 if (idp->uio->uio_resid < dp->d_reclen) { 341 idp->eofflag = 0; 342 return (-1); 343 } 344 345 if (idp->cookies) { 346 if (idp->ncookies <= 0) { 347 idp->eofflag = 0; 348 return (-1); 349 } 350 351 *idp->cookies++ = off; 352 --idp->ncookies; 353 } 354 355 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 356 return (error); 357 idp->uio_off = off; 358 return (0); 359 } 360 361 static int 362 iso_shipdir(struct isoreaddir *idp) 363 { 364 struct dirent *dp; 365 int cl, sl, assoc; 366 int error; 367 char *cname, *sname; 368 369 cl = idp->current.d_namlen; 370 cname = idp->current.d_name; 371 assoc = (cl > 1) && (*cname == ASSOCCHAR); 372 if (assoc) { 373 cl--; 374 cname++; 375 } 376 377 dp = &idp->saveent; 378 sname = dp->d_name; 379 if (!(sl = dp->d_namlen)) { 380 dp = &idp->assocent; 381 sname = dp->d_name + 1; 382 sl = dp->d_namlen - 1; 383 } 384 if (sl > 0) { 385 if (sl != cl 386 || bcmp(sname,cname,sl)) { 387 if (idp->assocent.d_namlen) { 388 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 389 return (error); 390 idp->assocent.d_namlen = 0; 391 } 392 if (idp->saveent.d_namlen) { 393 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 394 return (error); 395 idp->saveent.d_namlen = 0; 396 } 397 } 398 } 399 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 400 if (assoc) { 401 idp->assocoff = idp->curroff; 402 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 403 } else { 404 idp->saveoff = idp->curroff; 405 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 406 } 407 return (0); 408 } 409 410 /* 411 * Vnode op for readdir 412 */ 413 static int 414 cd9660_readdir(struct vop_readdir_args *ap) 415 { 416 struct uio *uio = ap->a_uio; 417 struct isoreaddir *idp; 418 struct vnode *vdp = ap->a_vp; 419 struct iso_node *dp; 420 struct iso_mnt *imp; 421 struct buf *bp = NULL; 422 struct iso_directory_record *ep; 423 int entryoffsetinblock; 424 doff_t endsearch; 425 u_long bmask; 426 int error = 0; 427 int reclen; 428 u_short namelen; 429 u_int ncookies = 0; 430 uint64_t *cookies = NULL; 431 cd_ino_t ino; 432 433 dp = VTOI(vdp); 434 imp = dp->i_mnt; 435 bmask = imp->im_bmask; 436 437 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 438 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 439 /* 440 * XXX 441 * Is it worth trying to figure out the type? 442 */ 443 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 444 DT_UNKNOWN; 445 idp->uio = uio; 446 if (ap->a_ncookies == NULL) { 447 idp->cookies = NULL; 448 } else { 449 /* 450 * Guess the number of cookies needed. 451 */ 452 ncookies = uio->uio_resid / 16; 453 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 454 idp->cookies = cookies; 455 idp->ncookies = ncookies; 456 } 457 idp->eofflag = 1; 458 idp->curroff = uio->uio_offset; 459 idp->uio_off = uio->uio_offset; 460 461 if ((entryoffsetinblock = idp->curroff & bmask) && 462 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 463 free(idp, M_TEMP); 464 return (error); 465 } 466 endsearch = dp->i_size; 467 468 while (idp->curroff < endsearch) { 469 /* 470 * If offset is on a block boundary, 471 * read the next directory block. 472 * Release previous if it exists. 473 */ 474 if ((idp->curroff & bmask) == 0) { 475 if (bp != NULL) 476 brelse(bp); 477 if ((error = 478 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 479 break; 480 entryoffsetinblock = 0; 481 } 482 /* 483 * Get pointer to next entry. 484 */ 485 ep = (struct iso_directory_record *) 486 ((char *)bp->b_data + entryoffsetinblock); 487 488 reclen = isonum_711(ep->length); 489 if (reclen == 0) { 490 /* skip to next block, if any */ 491 idp->curroff = 492 (idp->curroff & ~bmask) + imp->logical_block_size; 493 continue; 494 } 495 496 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 497 error = EINVAL; 498 /* illegal entry, stop */ 499 break; 500 } 501 502 if (entryoffsetinblock + reclen > imp->logical_block_size) { 503 error = EINVAL; 504 /* illegal directory, so stop looking */ 505 break; 506 } 507 508 idp->current.d_namlen = isonum_711(ep->name_len); 509 510 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 511 error = EINVAL; 512 /* illegal entry, stop */ 513 break; 514 } 515 516 if (isonum_711(ep->flags)&2) 517 idp->current.d_fileno = isodirino(ep, imp); 518 else 519 idp->current.d_fileno = dbtob(bp->b_blkno) + 520 entryoffsetinblock; 521 522 idp->curroff += reclen; 523 /* NOTE: d_off is the offset of *next* entry. */ 524 idp->current.d_off = idp->curroff; 525 526 switch (imp->iso_ftype) { 527 case ISO_FTYPE_RRIP: 528 ino = idp->current.d_fileno; 529 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 530 &ino, imp); 531 idp->current.d_fileno = ino; 532 idp->current.d_namlen = (u_char)namelen; 533 if (idp->current.d_namlen) 534 error = iso_uiodir(idp,&idp->current,idp->curroff); 535 break; 536 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 537 strcpy(idp->current.d_name,".."); 538 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 539 idp->current.d_namlen = 1; 540 error = iso_uiodir(idp,&idp->current,idp->curroff); 541 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 542 idp->current.d_namlen = 2; 543 error = iso_uiodir(idp,&idp->current,idp->curroff); 544 } else { 545 isofntrans(ep->name,idp->current.d_namlen, 546 idp->current.d_name, &namelen, 547 imp->iso_ftype == ISO_FTYPE_9660, 548 isonum_711(ep->flags)&4, 549 imp->joliet_level, 550 imp->im_flags, 551 imp->im_d2l); 552 idp->current.d_namlen = (u_char)namelen; 553 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 554 error = iso_shipdir(idp); 555 else 556 error = iso_uiodir(idp,&idp->current,idp->curroff); 557 } 558 } 559 if (error) 560 break; 561 562 entryoffsetinblock += reclen; 563 } 564 565 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 566 idp->current.d_namlen = 0; 567 error = iso_shipdir(idp); 568 } 569 if (error < 0) 570 error = 0; 571 572 if (ap->a_ncookies != NULL) { 573 if (error) 574 free(cookies, M_TEMP); 575 else { 576 /* 577 * Work out the number of cookies actually used. 578 */ 579 *ap->a_ncookies = ncookies - idp->ncookies; 580 *ap->a_cookies = cookies; 581 } 582 } 583 584 if (bp) 585 brelse (bp); 586 587 uio->uio_offset = idp->uio_off; 588 *ap->a_eofflag = idp->eofflag; 589 590 free(idp, M_TEMP); 591 592 return (error); 593 } 594 595 /* 596 * Return target name of a symbolic link 597 * Shouldn't we get the parent vnode and read the data from there? 598 * This could eventually result in deadlocks in cd9660_lookup. 599 * But otherwise the block read here is in the block buffer two times. 600 */ 601 typedef struct iso_directory_record ISODIR; 602 typedef struct iso_node ISONODE; 603 typedef struct iso_mnt ISOMNT; 604 static int 605 cd9660_readlink(struct vop_readlink_args *ap) 606 { 607 ISONODE *ip; 608 ISODIR *dirp; 609 ISOMNT *imp; 610 struct buf *bp; 611 struct uio *uio; 612 u_short symlen; 613 int error; 614 char *symname; 615 616 ip = VTOI(ap->a_vp); 617 imp = ip->i_mnt; 618 uio = ap->a_uio; 619 620 if (imp->iso_ftype != ISO_FTYPE_RRIP) 621 return (EINVAL); 622 623 /* 624 * Get parents directory record block that this inode included. 625 */ 626 error = bread(imp->im_devvp, 627 (ip->i_number >> imp->im_bshift) << 628 (imp->im_bshift - DEV_BSHIFT), 629 imp->logical_block_size, NOCRED, &bp); 630 if (error) { 631 return (EINVAL); 632 } 633 634 /* 635 * Setup the directory pointer for this inode 636 */ 637 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 638 639 /* 640 * Just make sure, we have a right one.... 641 * 1: Check not cross boundary on block 642 */ 643 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 644 > (unsigned)imp->logical_block_size) { 645 brelse(bp); 646 return (EINVAL); 647 } 648 649 /* 650 * Now get a buffer 651 * Abuse a namei buffer for now. 652 */ 653 if (uio->uio_segflg == UIO_SYSSPACE) 654 symname = uio->uio_iov->iov_base; 655 else 656 symname = uma_zalloc(namei_zone, M_WAITOK); 657 658 /* 659 * Ok, we just gathering a symbolic name in SL record. 660 */ 661 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 662 if (uio->uio_segflg != UIO_SYSSPACE) 663 uma_zfree(namei_zone, symname); 664 brelse(bp); 665 return (EINVAL); 666 } 667 /* 668 * Don't forget before you leave from home ;-) 669 */ 670 brelse(bp); 671 672 /* 673 * return with the symbolic name to caller's. 674 */ 675 if (uio->uio_segflg != UIO_SYSSPACE) { 676 error = uiomove(symname, symlen, uio); 677 uma_zfree(namei_zone, symname); 678 return (error); 679 } 680 uio->uio_resid -= symlen; 681 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 682 uio->uio_iov->iov_len -= symlen; 683 return (0); 684 } 685 686 /* 687 * Calculate the logical to physical mapping if not done already, 688 * then call the device strategy routine. 689 */ 690 static int 691 cd9660_strategy(struct vop_strategy_args *ap) 692 { 693 struct buf *bp = ap->a_bp; 694 struct vnode *vp = ap->a_vp; 695 struct iso_node *ip; 696 struct bufobj *bo; 697 698 ip = VTOI(vp); 699 if (vp->v_type == VBLK || vp->v_type == VCHR) 700 panic("cd9660_strategy: spec"); 701 if (bp->b_blkno == bp->b_lblkno) { 702 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 703 (ip->i_mnt->im_bshift - DEV_BSHIFT); 704 } 705 bp->b_iooffset = dbtob(bp->b_blkno); 706 bo = ip->i_mnt->im_bo; 707 BO_STRATEGY(bo, bp); 708 return (0); 709 } 710 711 /* 712 * Return POSIX pathconf information applicable to cd9660 filesystems. 713 */ 714 static int 715 cd9660_pathconf(struct vop_pathconf_args *ap) 716 { 717 718 switch (ap->a_name) { 719 case _PC_FILESIZEBITS: 720 *ap->a_retval = 32; 721 return (0); 722 case _PC_LINK_MAX: 723 *ap->a_retval = 1; 724 return (0); 725 case _PC_NAME_MAX: 726 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 727 *ap->a_retval = NAME_MAX; 728 else 729 *ap->a_retval = 37; 730 return (0); 731 case _PC_SYMLINK_MAX: 732 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 733 *ap->a_retval = MAXPATHLEN; 734 return (0); 735 } 736 return (EINVAL); 737 case _PC_NO_TRUNC: 738 *ap->a_retval = 1; 739 return (0); 740 default: 741 return (vop_stdpathconf(ap)); 742 } 743 /* NOTREACHED */ 744 } 745 746 /* 747 * Vnode pointer to File handle 748 */ 749 static int 750 cd9660_vptofh(struct vop_vptofh_args *ap) 751 { 752 struct ifid ifh; 753 struct iso_node *ip = VTOI(ap->a_vp); 754 755 ifh.ifid_len = sizeof(struct ifid); 756 757 ifh.ifid_ino = ip->i_number; 758 ifh.ifid_start = ip->iso_start; 759 /* 760 * This intentionally uses sizeof(ifh) in order to not copy stack 761 * garbage on ILP32. 762 */ 763 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 764 765 #ifdef ISOFS_DBG 766 printf("vptofh: ino %jd, start %ld\n", 767 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 768 #endif 769 770 return (0); 771 } 772 773 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 774 "cd9660 filesystem"); 775 static int use_buf_pager = 1; 776 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 777 &use_buf_pager, 0, 778 "Use buffer pager instead of bmap"); 779 780 static daddr_t 781 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 782 { 783 784 return (lblkno(VTOI(vp)->i_mnt, off)); 785 } 786 787 static int 788 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz) 789 { 790 struct iso_node *ip; 791 792 ip = VTOI(vp); 793 *sz = blksize(ip->i_mnt, ip, lbn); 794 return (0); 795 } 796 797 static int 798 cd9660_getpages(struct vop_getpages_args *ap) 799 { 800 struct vnode *vp; 801 802 vp = ap->a_vp; 803 if (vp->v_type == VCHR || vp->v_type == VBLK) 804 return (EOPNOTSUPP); 805 806 if (use_buf_pager) 807 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 808 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 809 cd9660_gbp_getblksz)); 810 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 811 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 812 } 813 814 /* 815 * Global vfs data structures for cd9660 816 */ 817 struct vop_vector cd9660_vnodeops = { 818 .vop_default = &default_vnodeops, 819 .vop_open = cd9660_open, 820 .vop_access = cd9660_access, 821 .vop_bmap = cd9660_bmap, 822 .vop_cachedlookup = cd9660_lookup, 823 .vop_getattr = cd9660_getattr, 824 .vop_inactive = cd9660_inactive, 825 .vop_ioctl = cd9660_ioctl, 826 .vop_lookup = vfs_cache_lookup, 827 .vop_pathconf = cd9660_pathconf, 828 .vop_read = cd9660_read, 829 .vop_readdir = cd9660_readdir, 830 .vop_readlink = cd9660_readlink, 831 .vop_reclaim = cd9660_reclaim, 832 .vop_setattr = cd9660_setattr, 833 .vop_strategy = cd9660_strategy, 834 .vop_vptofh = cd9660_vptofh, 835 .vop_getpages = cd9660_getpages, 836 }; 837 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops); 838 839 /* 840 * Special device vnode ops 841 */ 842 843 struct vop_vector cd9660_fifoops = { 844 .vop_default = &fifo_specops, 845 .vop_access = cd9660_access, 846 .vop_getattr = cd9660_getattr, 847 .vop_inactive = cd9660_inactive, 848 .vop_reclaim = cd9660_reclaim, 849 .vop_setattr = cd9660_setattr, 850 .vop_vptofh = cd9660_vptofh, 851 }; 852 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops); 853