1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/kernel.h> 44 #include <sys/conf.h> 45 #include <sys/stat.h> 46 #include <sys/bio.h> 47 #include <sys/buf.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <fs/fifofs/fifo.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/unistd.h> 54 #include <sys/filio.h> 55 56 #include <vm/vm.h> 57 #include <vm/vnode_pager.h> 58 #include <vm/uma.h> 59 60 #include <fs/cd9660/iso.h> 61 #include <fs/cd9660/cd9660_node.h> 62 #include <fs/cd9660/iso_rrip.h> 63 64 static vop_setattr_t cd9660_setattr; 65 static vop_open_t cd9660_open; 66 static vop_access_t cd9660_access; 67 static vop_getattr_t cd9660_getattr; 68 static vop_ioctl_t cd9660_ioctl; 69 static vop_pathconf_t cd9660_pathconf; 70 static vop_read_t cd9660_read; 71 struct isoreaddir; 72 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off); 73 static int iso_shipdir(struct isoreaddir *idp); 74 static vop_readdir_t cd9660_readdir; 75 static vop_readlink_t cd9660_readlink; 76 static vop_strategy_t cd9660_strategy; 77 static vop_vptofh_t cd9660_vptofh; 78 79 /* 80 * Setattr call. Only allowed for block and character special devices. 81 */ 82 static int 83 cd9660_setattr(ap) 84 struct vop_setattr_args /* { 85 struct vnodeop_desc *a_desc; 86 struct vnode *a_vp; 87 struct vattr *a_vap; 88 struct ucred *a_cred; 89 } */ *ap; 90 { 91 struct vnode *vp = ap->a_vp; 92 struct vattr *vap = ap->a_vap; 93 94 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 95 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 96 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 97 return (EROFS); 98 if (vap->va_size != (u_quad_t)VNOVAL) { 99 switch (vp->v_type) { 100 case VDIR: 101 return (EISDIR); 102 case VLNK: 103 case VREG: 104 return (EROFS); 105 case VCHR: 106 case VBLK: 107 case VSOCK: 108 case VFIFO: 109 case VNON: 110 case VBAD: 111 case VMARKER: 112 return (0); 113 } 114 } 115 return (0); 116 } 117 118 /* 119 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 120 * The mode is shifted to select the owner/group/other fields. The 121 * super user is granted all permissions. 122 */ 123 /* ARGSUSED */ 124 static int 125 cd9660_access(ap) 126 struct vop_access_args /* { 127 struct vnode *a_vp; 128 accmode_t a_accmode; 129 struct ucred *a_cred; 130 struct thread *a_td; 131 } */ *ap; 132 { 133 struct vnode *vp = ap->a_vp; 134 struct iso_node *ip = VTOI(vp); 135 accmode_t accmode = ap->a_accmode; 136 137 if (vp->v_type == VCHR || vp->v_type == VBLK) 138 return (EOPNOTSUPP); 139 140 /* 141 * Disallow write attempts unless the file is a socket, 142 * fifo, or a block or character device resident on the 143 * filesystem. 144 */ 145 if (accmode & VWRITE) { 146 switch (vp->v_type) { 147 case VDIR: 148 case VLNK: 149 case VREG: 150 return (EROFS); 151 /* NOT REACHED */ 152 default: 153 break; 154 } 155 } 156 157 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 158 ip->inode.iso_gid, ap->a_accmode, ap->a_cred, NULL)); 159 } 160 161 static int 162 cd9660_open(ap) 163 struct vop_open_args /* { 164 struct vnode *a_vp; 165 int a_mode; 166 struct ucred *a_cred; 167 struct thread *a_td; 168 int a_fdidx; 169 } */ *ap; 170 { 171 struct iso_node *ip = VTOI(ap->a_vp); 172 173 vnode_create_vobject(ap->a_vp, ip->i_size, ap->a_td); 174 return 0; 175 } 176 177 178 static int 179 cd9660_getattr(ap) 180 struct vop_getattr_args /* { 181 struct vnode *a_vp; 182 struct vattr *a_vap; 183 struct ucred *a_cred; 184 } */ *ap; 185 186 { 187 struct vnode *vp = ap->a_vp; 188 struct vattr *vap = ap->a_vap; 189 struct iso_node *ip = VTOI(vp); 190 191 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 192 vap->va_fileid = ip->i_number; 193 194 vap->va_mode = ip->inode.iso_mode; 195 vap->va_nlink = ip->inode.iso_links; 196 vap->va_uid = ip->inode.iso_uid; 197 vap->va_gid = ip->inode.iso_gid; 198 vap->va_atime = ip->inode.iso_atime; 199 vap->va_mtime = ip->inode.iso_mtime; 200 vap->va_ctime = ip->inode.iso_ctime; 201 vap->va_rdev = ip->inode.iso_rdev; 202 203 vap->va_size = (u_quad_t) ip->i_size; 204 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 205 struct vop_readlink_args rdlnk; 206 struct iovec aiov; 207 struct uio auio; 208 char *cp; 209 210 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 211 aiov.iov_base = cp; 212 aiov.iov_len = MAXPATHLEN; 213 auio.uio_iov = &aiov; 214 auio.uio_iovcnt = 1; 215 auio.uio_offset = 0; 216 auio.uio_rw = UIO_READ; 217 auio.uio_segflg = UIO_SYSSPACE; 218 auio.uio_td = curthread; 219 auio.uio_resid = MAXPATHLEN; 220 rdlnk.a_uio = &auio; 221 rdlnk.a_vp = ap->a_vp; 222 rdlnk.a_cred = ap->a_cred; 223 if (cd9660_readlink(&rdlnk) == 0) 224 vap->va_size = MAXPATHLEN - auio.uio_resid; 225 free(cp, M_TEMP); 226 } 227 vap->va_flags = 0; 228 vap->va_gen = 1; 229 vap->va_blocksize = ip->i_mnt->logical_block_size; 230 vap->va_bytes = (u_quad_t) ip->i_size; 231 vap->va_type = vp->v_type; 232 vap->va_filerev = 0; 233 return (0); 234 } 235 236 /* 237 * Vnode op for ioctl. 238 */ 239 static int 240 cd9660_ioctl(ap) 241 struct vop_ioctl_args /* { 242 struct vnode *a_vp; 243 u_long a_command; 244 caddr_t a_data; 245 int a_fflag; 246 struct ucred *a_cred; 247 struct thread *a_td; 248 } */ *ap; 249 { 250 struct vnode *vp = ap->a_vp; 251 struct iso_node *ip = VTOI(vp); 252 253 if (vp->v_type == VCHR || vp->v_type == VBLK) 254 return (EOPNOTSUPP); 255 256 switch (ap->a_command) { 257 258 case FIOGETLBA: 259 *(int *)(ap->a_data) = ip->iso_start; 260 return 0; 261 default: 262 return (ENOTTY); 263 } 264 } 265 266 /* 267 * Vnode op for reading. 268 */ 269 static int 270 cd9660_read(ap) 271 struct vop_read_args /* { 272 struct vnode *a_vp; 273 struct uio *a_uio; 274 int a_ioflag; 275 struct ucred *a_cred; 276 } */ *ap; 277 { 278 struct vnode *vp = ap->a_vp; 279 struct uio *uio = ap->a_uio; 280 struct iso_node *ip = VTOI(vp); 281 struct iso_mnt *imp; 282 struct buf *bp; 283 daddr_t lbn, rablock; 284 off_t diff; 285 int rasize, error = 0; 286 int seqcount; 287 long size, n, on; 288 289 if (vp->v_type == VCHR || vp->v_type == VBLK) 290 return (EOPNOTSUPP); 291 292 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 293 294 if (uio->uio_resid == 0) 295 return (0); 296 if (uio->uio_offset < 0) 297 return (EINVAL); 298 imp = ip->i_mnt; 299 do { 300 lbn = lblkno(imp, uio->uio_offset); 301 on = blkoff(imp, uio->uio_offset); 302 n = min((u_int)(imp->logical_block_size - on), 303 uio->uio_resid); 304 diff = (off_t)ip->i_size - uio->uio_offset; 305 if (diff <= 0) 306 return (0); 307 if (diff < n) 308 n = diff; 309 size = blksize(imp, ip, lbn); 310 rablock = lbn + 1; 311 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 312 if (lblktosize(imp, rablock) < ip->i_size) 313 error = cluster_read(vp, (off_t)ip->i_size, 314 lbn, size, NOCRED, uio->uio_resid, 315 (ap->a_ioflag >> 16), &bp); 316 else 317 error = bread(vp, lbn, size, NOCRED, &bp); 318 } else { 319 if (seqcount > 1 && 320 lblktosize(imp, rablock) < ip->i_size) { 321 rasize = blksize(imp, ip, rablock); 322 error = breadn(vp, lbn, size, &rablock, 323 &rasize, 1, NOCRED, &bp); 324 } else 325 error = bread(vp, lbn, size, NOCRED, &bp); 326 } 327 n = min(n, size - bp->b_resid); 328 if (error) { 329 brelse(bp); 330 return (error); 331 } 332 333 error = uiomove(bp->b_data + on, (int)n, uio); 334 brelse(bp); 335 } while (error == 0 && uio->uio_resid > 0 && n != 0); 336 return (error); 337 } 338 339 /* 340 * Structure for reading directories 341 */ 342 struct isoreaddir { 343 struct dirent saveent; 344 struct dirent assocent; 345 struct dirent current; 346 off_t saveoff; 347 off_t assocoff; 348 off_t curroff; 349 struct uio *uio; 350 off_t uio_off; 351 int eofflag; 352 u_long *cookies; 353 int ncookies; 354 }; 355 356 static int 357 iso_uiodir(idp,dp,off) 358 struct isoreaddir *idp; 359 struct dirent *dp; 360 off_t off; 361 { 362 int error; 363 364 dp->d_name[dp->d_namlen] = 0; 365 dp->d_reclen = GENERIC_DIRSIZ(dp); 366 367 if (idp->uio->uio_resid < dp->d_reclen) { 368 idp->eofflag = 0; 369 return (-1); 370 } 371 372 if (idp->cookies) { 373 if (idp->ncookies <= 0) { 374 idp->eofflag = 0; 375 return (-1); 376 } 377 378 *idp->cookies++ = off; 379 --idp->ncookies; 380 } 381 382 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 383 return (error); 384 idp->uio_off = off; 385 return (0); 386 } 387 388 static int 389 iso_shipdir(idp) 390 struct isoreaddir *idp; 391 { 392 struct dirent *dp; 393 int cl, sl, assoc; 394 int error; 395 char *cname, *sname; 396 397 cl = idp->current.d_namlen; 398 cname = idp->current.d_name; 399 assoc = (cl > 1) && (*cname == ASSOCCHAR); 400 if (assoc) { 401 cl--; 402 cname++; 403 } 404 405 dp = &idp->saveent; 406 sname = dp->d_name; 407 if (!(sl = dp->d_namlen)) { 408 dp = &idp->assocent; 409 sname = dp->d_name + 1; 410 sl = dp->d_namlen - 1; 411 } 412 if (sl > 0) { 413 if (sl != cl 414 || bcmp(sname,cname,sl)) { 415 if (idp->assocent.d_namlen) { 416 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 417 return (error); 418 idp->assocent.d_namlen = 0; 419 } 420 if (idp->saveent.d_namlen) { 421 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 422 return (error); 423 idp->saveent.d_namlen = 0; 424 } 425 } 426 } 427 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 428 if (assoc) { 429 idp->assocoff = idp->curroff; 430 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 431 } else { 432 idp->saveoff = idp->curroff; 433 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 434 } 435 return (0); 436 } 437 438 /* 439 * Vnode op for readdir 440 */ 441 static int 442 cd9660_readdir(ap) 443 struct vop_readdir_args /* { 444 struct vnode *a_vp; 445 struct uio *a_uio; 446 struct ucred *a_cred; 447 int *a_eofflag; 448 int *a_ncookies; 449 u_long **a_cookies; 450 } */ *ap; 451 { 452 struct uio *uio = ap->a_uio; 453 struct isoreaddir *idp; 454 struct vnode *vdp = ap->a_vp; 455 struct iso_node *dp; 456 struct iso_mnt *imp; 457 struct buf *bp = NULL; 458 struct iso_directory_record *ep; 459 int entryoffsetinblock; 460 doff_t endsearch; 461 u_long bmask; 462 int error = 0; 463 int reclen; 464 u_short namelen; 465 int ncookies = 0; 466 u_long *cookies = NULL; 467 468 dp = VTOI(vdp); 469 imp = dp->i_mnt; 470 bmask = imp->im_bmask; 471 472 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 473 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 474 /* 475 * XXX 476 * Is it worth trying to figure out the type? 477 */ 478 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 479 DT_UNKNOWN; 480 idp->uio = uio; 481 if (ap->a_ncookies == NULL) { 482 idp->cookies = NULL; 483 } else { 484 /* 485 * Guess the number of cookies needed. 486 */ 487 ncookies = uio->uio_resid / 16; 488 cookies = malloc(ncookies * sizeof(u_long), 489 M_TEMP, M_WAITOK); 490 idp->cookies = cookies; 491 idp->ncookies = ncookies; 492 } 493 idp->eofflag = 1; 494 idp->curroff = uio->uio_offset; 495 idp->uio_off = uio->uio_offset; 496 497 if ((entryoffsetinblock = idp->curroff & bmask) && 498 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 499 free(idp, M_TEMP); 500 return (error); 501 } 502 endsearch = dp->i_size; 503 504 while (idp->curroff < endsearch) { 505 /* 506 * If offset is on a block boundary, 507 * read the next directory block. 508 * Release previous if it exists. 509 */ 510 if ((idp->curroff & bmask) == 0) { 511 if (bp != NULL) 512 brelse(bp); 513 if ((error = 514 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 515 break; 516 entryoffsetinblock = 0; 517 } 518 /* 519 * Get pointer to next entry. 520 */ 521 ep = (struct iso_directory_record *) 522 ((char *)bp->b_data + entryoffsetinblock); 523 524 reclen = isonum_711(ep->length); 525 if (reclen == 0) { 526 /* skip to next block, if any */ 527 idp->curroff = 528 (idp->curroff & ~bmask) + imp->logical_block_size; 529 continue; 530 } 531 532 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 533 error = EINVAL; 534 /* illegal entry, stop */ 535 break; 536 } 537 538 if (entryoffsetinblock + reclen > imp->logical_block_size) { 539 error = EINVAL; 540 /* illegal directory, so stop looking */ 541 break; 542 } 543 544 idp->current.d_namlen = isonum_711(ep->name_len); 545 546 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 547 error = EINVAL; 548 /* illegal entry, stop */ 549 break; 550 } 551 552 if (isonum_711(ep->flags)&2) 553 idp->current.d_fileno = isodirino(ep, imp); 554 else 555 idp->current.d_fileno = dbtob(bp->b_blkno) + 556 entryoffsetinblock; 557 558 idp->curroff += reclen; 559 560 switch (imp->iso_ftype) { 561 case ISO_FTYPE_RRIP: 562 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 563 &idp->current.d_fileno,imp); 564 idp->current.d_namlen = (u_char)namelen; 565 if (idp->current.d_namlen) 566 error = iso_uiodir(idp,&idp->current,idp->curroff); 567 break; 568 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 569 strcpy(idp->current.d_name,".."); 570 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 571 idp->current.d_namlen = 1; 572 error = iso_uiodir(idp,&idp->current,idp->curroff); 573 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 574 idp->current.d_namlen = 2; 575 error = iso_uiodir(idp,&idp->current,idp->curroff); 576 } else { 577 isofntrans(ep->name,idp->current.d_namlen, 578 idp->current.d_name, &namelen, 579 imp->iso_ftype == ISO_FTYPE_9660, 580 isonum_711(ep->flags)&4, 581 imp->joliet_level, 582 imp->im_flags, 583 imp->im_d2l); 584 idp->current.d_namlen = (u_char)namelen; 585 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 586 error = iso_shipdir(idp); 587 else 588 error = iso_uiodir(idp,&idp->current,idp->curroff); 589 } 590 } 591 if (error) 592 break; 593 594 entryoffsetinblock += reclen; 595 } 596 597 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 598 idp->current.d_namlen = 0; 599 error = iso_shipdir(idp); 600 } 601 if (error < 0) 602 error = 0; 603 604 if (ap->a_ncookies != NULL) { 605 if (error) 606 free(cookies, M_TEMP); 607 else { 608 /* 609 * Work out the number of cookies actually used. 610 */ 611 *ap->a_ncookies = ncookies - idp->ncookies; 612 *ap->a_cookies = cookies; 613 } 614 } 615 616 if (bp) 617 brelse (bp); 618 619 uio->uio_offset = idp->uio_off; 620 *ap->a_eofflag = idp->eofflag; 621 622 free(idp, M_TEMP); 623 624 return (error); 625 } 626 627 /* 628 * Return target name of a symbolic link 629 * Shouldn't we get the parent vnode and read the data from there? 630 * This could eventually result in deadlocks in cd9660_lookup. 631 * But otherwise the block read here is in the block buffer two times. 632 */ 633 typedef struct iso_directory_record ISODIR; 634 typedef struct iso_node ISONODE; 635 typedef struct iso_mnt ISOMNT; 636 static int 637 cd9660_readlink(ap) 638 struct vop_readlink_args /* { 639 struct vnode *a_vp; 640 struct uio *a_uio; 641 struct ucred *a_cred; 642 } */ *ap; 643 { 644 ISONODE *ip; 645 ISODIR *dirp; 646 ISOMNT *imp; 647 struct buf *bp; 648 struct uio *uio; 649 u_short symlen; 650 int error; 651 char *symname; 652 653 ip = VTOI(ap->a_vp); 654 imp = ip->i_mnt; 655 uio = ap->a_uio; 656 657 if (imp->iso_ftype != ISO_FTYPE_RRIP) 658 return (EINVAL); 659 660 /* 661 * Get parents directory record block that this inode included. 662 */ 663 error = bread(imp->im_devvp, 664 (ip->i_number >> imp->im_bshift) << 665 (imp->im_bshift - DEV_BSHIFT), 666 imp->logical_block_size, NOCRED, &bp); 667 if (error) { 668 brelse(bp); 669 return (EINVAL); 670 } 671 672 /* 673 * Setup the directory pointer for this inode 674 */ 675 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 676 677 /* 678 * Just make sure, we have a right one.... 679 * 1: Check not cross boundary on block 680 */ 681 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 682 > (unsigned)imp->logical_block_size) { 683 brelse(bp); 684 return (EINVAL); 685 } 686 687 /* 688 * Now get a buffer 689 * Abuse a namei buffer for now. 690 */ 691 if (uio->uio_segflg == UIO_SYSSPACE) 692 symname = uio->uio_iov->iov_base; 693 else 694 symname = uma_zalloc(namei_zone, M_WAITOK); 695 696 /* 697 * Ok, we just gathering a symbolic name in SL record. 698 */ 699 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 700 if (uio->uio_segflg != UIO_SYSSPACE) 701 uma_zfree(namei_zone, symname); 702 brelse(bp); 703 return (EINVAL); 704 } 705 /* 706 * Don't forget before you leave from home ;-) 707 */ 708 brelse(bp); 709 710 /* 711 * return with the symbolic name to caller's. 712 */ 713 if (uio->uio_segflg != UIO_SYSSPACE) { 714 error = uiomove(symname, symlen, uio); 715 uma_zfree(namei_zone, symname); 716 return (error); 717 } 718 uio->uio_resid -= symlen; 719 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 720 uio->uio_iov->iov_len -= symlen; 721 return (0); 722 } 723 724 /* 725 * Calculate the logical to physical mapping if not done already, 726 * then call the device strategy routine. 727 */ 728 static int 729 cd9660_strategy(ap) 730 struct vop_strategy_args /* { 731 struct buf *a_vp; 732 struct buf *a_bp; 733 } */ *ap; 734 { 735 struct buf *bp = ap->a_bp; 736 struct vnode *vp = ap->a_vp; 737 struct iso_node *ip; 738 struct bufobj *bo; 739 740 ip = VTOI(vp); 741 if (vp->v_type == VBLK || vp->v_type == VCHR) 742 panic("cd9660_strategy: spec"); 743 if (bp->b_blkno == bp->b_lblkno) { 744 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 745 (ip->i_mnt->im_bshift - DEV_BSHIFT); 746 } 747 bp->b_iooffset = dbtob(bp->b_blkno); 748 bo = ip->i_mnt->im_bo; 749 BO_STRATEGY(bo, bp); 750 return (0); 751 } 752 753 /* 754 * Return POSIX pathconf information applicable to cd9660 filesystems. 755 */ 756 static int 757 cd9660_pathconf(ap) 758 struct vop_pathconf_args /* { 759 struct vnode *a_vp; 760 int a_name; 761 register_t *a_retval; 762 } */ *ap; 763 { 764 765 switch (ap->a_name) { 766 case _PC_LINK_MAX: 767 *ap->a_retval = 1; 768 return (0); 769 case _PC_NAME_MAX: 770 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 771 *ap->a_retval = NAME_MAX; 772 else 773 *ap->a_retval = 37; 774 return (0); 775 case _PC_PATH_MAX: 776 *ap->a_retval = PATH_MAX; 777 return (0); 778 case _PC_PIPE_BUF: 779 *ap->a_retval = PIPE_BUF; 780 return (0); 781 case _PC_CHOWN_RESTRICTED: 782 *ap->a_retval = 1; 783 return (0); 784 case _PC_NO_TRUNC: 785 *ap->a_retval = 1; 786 return (0); 787 default: 788 return (EINVAL); 789 } 790 /* NOTREACHED */ 791 } 792 793 /* 794 * Vnode pointer to File handle 795 */ 796 static int 797 cd9660_vptofh(ap) 798 struct vop_vptofh_args /* { 799 struct vnode *a_vp; 800 struct fid *a_fhp; 801 } */ *ap; 802 { 803 struct iso_node *ip = VTOI(ap->a_vp); 804 struct ifid *ifhp; 805 806 ifhp = (struct ifid *)ap->a_fhp; 807 ifhp->ifid_len = sizeof(struct ifid); 808 809 ifhp->ifid_ino = ip->i_number; 810 ifhp->ifid_start = ip->iso_start; 811 812 #ifdef ISOFS_DBG 813 printf("vptofh: ino %d, start %ld\n", 814 ifhp->ifid_ino,ifhp->ifid_start); 815 #endif 816 return 0; 817 } 818 819 /* 820 * Global vfs data structures for cd9660 821 */ 822 struct vop_vector cd9660_vnodeops = { 823 .vop_default = &default_vnodeops, 824 .vop_open = cd9660_open, 825 .vop_access = cd9660_access, 826 .vop_bmap = cd9660_bmap, 827 .vop_cachedlookup = cd9660_lookup, 828 .vop_getattr = cd9660_getattr, 829 .vop_inactive = cd9660_inactive, 830 .vop_ioctl = cd9660_ioctl, 831 .vop_lookup = vfs_cache_lookup, 832 .vop_pathconf = cd9660_pathconf, 833 .vop_read = cd9660_read, 834 .vop_readdir = cd9660_readdir, 835 .vop_readlink = cd9660_readlink, 836 .vop_reclaim = cd9660_reclaim, 837 .vop_setattr = cd9660_setattr, 838 .vop_strategy = cd9660_strategy, 839 .vop_vptofh = cd9660_vptofh, 840 }; 841 842 /* 843 * Special device vnode ops 844 */ 845 846 struct vop_vector cd9660_fifoops = { 847 .vop_default = &fifo_specops, 848 .vop_access = cd9660_access, 849 .vop_getattr = cd9660_getattr, 850 .vop_inactive = cd9660_inactive, 851 .vop_reclaim = cd9660_reclaim, 852 .vop_setattr = cd9660_setattr, 853 .vop_vptofh = cd9660_vptofh, 854 }; 855