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/stat.h> 45 #include <sys/bio.h> 46 #include <sys/buf.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 #include <fs/fifofs/fifo.h> 50 #include <sys/malloc.h> 51 #include <sys/dirent.h> 52 #include <sys/unistd.h> 53 #include <sys/filio.h> 54 55 #include <vm/vm.h> 56 #include <vm/vnode_pager.h> 57 #include <vm/uma.h> 58 59 #include <isofs/cd9660/iso.h> 60 #include <isofs/cd9660/cd9660_node.h> 61 #include <isofs/cd9660/iso_rrip.h> 62 63 static vop_setattr_t cd9660_setattr; 64 static vop_open_t cd9660_open; 65 static vop_access_t cd9660_access; 66 static vop_getattr_t cd9660_getattr; 67 static vop_ioctl_t cd9660_ioctl; 68 static vop_pathconf_t cd9660_pathconf; 69 static vop_read_t cd9660_read; 70 struct isoreaddir; 71 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off); 72 static int iso_shipdir(struct isoreaddir *idp); 73 static vop_readdir_t cd9660_readdir; 74 static vop_readlink_t cd9660_readlink; 75 static vop_strategy_t cd9660_strategy; 76 77 /* 78 * Setattr call. Only allowed for block and character special devices. 79 */ 80 static int 81 cd9660_setattr(ap) 82 struct vop_setattr_args /* { 83 struct vnodeop_desc *a_desc; 84 struct vnode *a_vp; 85 struct vattr *a_vap; 86 struct ucred *a_cred; 87 struct thread *a_td; 88 } */ *ap; 89 { 90 struct vnode *vp = ap->a_vp; 91 struct vattr *vap = ap->a_vap; 92 93 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 94 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 95 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 96 return (EROFS); 97 if (vap->va_size != (u_quad_t)VNOVAL) { 98 switch (vp->v_type) { 99 case VDIR: 100 return (EISDIR); 101 case VLNK: 102 case VREG: 103 return (EROFS); 104 case VCHR: 105 case VBLK: 106 case VSOCK: 107 case VFIFO: 108 case VNON: 109 case VBAD: 110 return (0); 111 } 112 } 113 return (0); 114 } 115 116 /* 117 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 118 * The mode is shifted to select the owner/group/other fields. The 119 * super user is granted all permissions. 120 */ 121 /* ARGSUSED */ 122 static int 123 cd9660_access(ap) 124 struct vop_access_args /* { 125 struct vnode *a_vp; 126 int a_mode; 127 struct ucred *a_cred; 128 struct thread *a_td; 129 } */ *ap; 130 { 131 struct vnode *vp = ap->a_vp; 132 struct iso_node *ip = VTOI(vp); 133 mode_t mode = ap->a_mode; 134 135 if (vp->v_type == VCHR || vp->v_type == VBLK) 136 return (EOPNOTSUPP); 137 138 /* 139 * Disallow write attempts unless the file is a socket, 140 * fifo, or a block or character device resident on the 141 * filesystem. 142 */ 143 if (mode & VWRITE) { 144 switch (vp->v_type) { 145 case VDIR: 146 case VLNK: 147 case VREG: 148 return (EROFS); 149 /* NOT REACHED */ 150 default: 151 break; 152 } 153 } 154 155 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 156 ip->inode.iso_gid, ap->a_mode, ap->a_cred, NULL)); 157 } 158 159 static int 160 cd9660_open(ap) 161 struct vop_open_args /* { 162 struct vnode *a_vp; 163 int a_mode; 164 struct ucred *a_cred; 165 struct thread *a_td; 166 int a_fdidx; 167 } */ *ap; 168 { 169 struct iso_node *ip = VTOI(ap->a_vp); 170 171 vnode_create_vobject(ap->a_vp, ip->i_size, ap->a_td); 172 return 0; 173 } 174 175 176 static int 177 cd9660_getattr(ap) 178 struct vop_getattr_args /* { 179 struct vnode *a_vp; 180 struct vattr *a_vap; 181 struct ucred *a_cred; 182 struct thread *a_td; 183 } */ *ap; 184 185 { 186 struct vnode *vp = ap->a_vp; 187 struct vattr *vap = ap->a_vap; 188 struct iso_node *ip = VTOI(vp); 189 190 vap->va_fsid = dev2udev(ip->i_dev); 191 vap->va_fileid = ip->i_number; 192 193 vap->va_mode = ip->inode.iso_mode; 194 vap->va_nlink = ip->inode.iso_links; 195 vap->va_uid = ip->inode.iso_uid; 196 vap->va_gid = ip->inode.iso_gid; 197 vap->va_atime = ip->inode.iso_atime; 198 vap->va_mtime = ip->inode.iso_mtime; 199 vap->va_ctime = ip->inode.iso_ctime; 200 vap->va_rdev = ip->inode.iso_rdev; 201 202 vap->va_size = (u_quad_t) ip->i_size; 203 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 204 struct vop_readlink_args rdlnk; 205 struct iovec aiov; 206 struct uio auio; 207 char *cp; 208 209 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 210 aiov.iov_base = cp; 211 aiov.iov_len = MAXPATHLEN; 212 auio.uio_iov = &aiov; 213 auio.uio_iovcnt = 1; 214 auio.uio_offset = 0; 215 auio.uio_rw = UIO_READ; 216 auio.uio_segflg = UIO_SYSSPACE; 217 auio.uio_td = ap->a_td; 218 auio.uio_resid = MAXPATHLEN; 219 rdlnk.a_uio = &auio; 220 rdlnk.a_vp = ap->a_vp; 221 rdlnk.a_cred = ap->a_cred; 222 if (cd9660_readlink(&rdlnk) == 0) 223 vap->va_size = MAXPATHLEN - auio.uio_resid; 224 FREE(cp, M_TEMP); 225 } 226 vap->va_flags = 0; 227 vap->va_gen = 1; 228 vap->va_blocksize = ip->i_mnt->logical_block_size; 229 vap->va_bytes = (u_quad_t) ip->i_size; 230 vap->va_type = vp->v_type; 231 vap->va_filerev = 0; 232 return (0); 233 } 234 235 /* 236 * Vnode op for ioctl. 237 */ 238 static int 239 cd9660_ioctl(ap) 240 struct vop_ioctl_args /* { 241 struct vnode *a_vp; 242 u_long a_command; 243 caddr_t a_data; 244 int a_fflag; 245 struct ucred *a_cred; 246 struct thread *a_td; 247 } */ *ap; 248 { 249 struct vnode *vp = ap->a_vp; 250 struct iso_node *ip = VTOI(vp); 251 252 if (vp->v_type == VCHR || vp->v_type == VBLK) 253 return (EOPNOTSUPP); 254 255 switch (ap->a_command) { 256 257 case FIOGETLBA: 258 *(int *)(ap->a_data) = ip->iso_start; 259 return 0; 260 default: 261 return (ENOTTY); 262 } 263 } 264 265 /* 266 * Vnode op for reading. 267 */ 268 static int 269 cd9660_read(ap) 270 struct vop_read_args /* { 271 struct vnode *a_vp; 272 struct uio *a_uio; 273 int a_ioflag; 274 struct ucred *a_cred; 275 } */ *ap; 276 { 277 struct vnode *vp = ap->a_vp; 278 struct uio *uio = ap->a_uio; 279 struct iso_node *ip = VTOI(vp); 280 struct iso_mnt *imp; 281 struct buf *bp; 282 daddr_t lbn, rablock; 283 off_t diff; 284 int rasize, error = 0; 285 int seqcount; 286 long size, n, on; 287 288 if (vp->v_type == VCHR || vp->v_type == VBLK) 289 return (EOPNOTSUPP); 290 291 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 292 293 if (uio->uio_resid == 0) 294 return (0); 295 if (uio->uio_offset < 0) 296 return (EINVAL); 297 ip->i_flag |= IN_ACCESS; 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 MALLOC(idp, struct isoreaddir *, 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 MALLOC(cookies, u_long *, 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; 495 496 if ((entryoffsetinblock = idp->curroff & bmask) && 497 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 498 FREE(idp, M_TEMP); 499 return (error); 500 } 501 endsearch = dp->i_size; 502 503 while (idp->curroff < endsearch) { 504 /* 505 * If offset is on a block boundary, 506 * read the next directory block. 507 * Release previous if it exists. 508 */ 509 if ((idp->curroff & bmask) == 0) { 510 if (bp != NULL) 511 brelse(bp); 512 if ((error = 513 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 514 break; 515 entryoffsetinblock = 0; 516 } 517 /* 518 * Get pointer to next entry. 519 */ 520 ep = (struct iso_directory_record *) 521 ((char *)bp->b_data + entryoffsetinblock); 522 523 reclen = isonum_711(ep->length); 524 if (reclen == 0) { 525 /* skip to next block, if any */ 526 idp->curroff = 527 (idp->curroff & ~bmask) + imp->logical_block_size; 528 continue; 529 } 530 531 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 532 error = EINVAL; 533 /* illegal entry, stop */ 534 break; 535 } 536 537 if (entryoffsetinblock + reclen > imp->logical_block_size) { 538 error = EINVAL; 539 /* illegal directory, so stop looking */ 540 break; 541 } 542 543 idp->current.d_namlen = isonum_711(ep->name_len); 544 545 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 546 error = EINVAL; 547 /* illegal entry, stop */ 548 break; 549 } 550 551 if (isonum_711(ep->flags)&2) 552 idp->current.d_fileno = isodirino(ep, imp); 553 else 554 idp->current.d_fileno = dbtob(bp->b_blkno) + 555 entryoffsetinblock; 556 557 idp->curroff += reclen; 558 559 switch (imp->iso_ftype) { 560 case ISO_FTYPE_RRIP: 561 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 562 &idp->current.d_fileno,imp); 563 idp->current.d_namlen = (u_char)namelen; 564 if (idp->current.d_namlen) 565 error = iso_uiodir(idp,&idp->current,idp->curroff); 566 break; 567 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 568 strcpy(idp->current.d_name,".."); 569 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 570 idp->current.d_namlen = 1; 571 error = iso_uiodir(idp,&idp->current,idp->curroff); 572 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 573 idp->current.d_namlen = 2; 574 error = iso_uiodir(idp,&idp->current,idp->curroff); 575 } else { 576 isofntrans(ep->name,idp->current.d_namlen, 577 idp->current.d_name, &namelen, 578 imp->iso_ftype == ISO_FTYPE_9660, 579 isonum_711(ep->flags)&4, 580 imp->joliet_level, 581 imp->im_flags, 582 imp->im_d2l); 583 idp->current.d_namlen = (u_char)namelen; 584 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 585 error = iso_shipdir(idp); 586 else 587 error = iso_uiodir(idp,&idp->current,idp->curroff); 588 } 589 } 590 if (error) 591 break; 592 593 entryoffsetinblock += reclen; 594 } 595 596 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 597 idp->current.d_namlen = 0; 598 error = iso_shipdir(idp); 599 } 600 if (error < 0) 601 error = 0; 602 603 if (ap->a_ncookies != NULL) { 604 if (error) 605 free(cookies, M_TEMP); 606 else { 607 /* 608 * Work out the number of cookies actually used. 609 */ 610 *ap->a_ncookies = ncookies - idp->ncookies; 611 *ap->a_cookies = cookies; 612 } 613 } 614 615 if (bp) 616 brelse (bp); 617 618 uio->uio_offset = idp->uio_off; 619 *ap->a_eofflag = idp->eofflag; 620 621 FREE(idp, M_TEMP); 622 623 return (error); 624 } 625 626 /* 627 * Return target name of a symbolic link 628 * Shouldn't we get the parent vnode and read the data from there? 629 * This could eventually result in deadlocks in cd9660_lookup. 630 * But otherwise the block read here is in the block buffer two times. 631 */ 632 typedef struct iso_directory_record ISODIR; 633 typedef struct iso_node ISONODE; 634 typedef struct iso_mnt ISOMNT; 635 static int 636 cd9660_readlink(ap) 637 struct vop_readlink_args /* { 638 struct vnode *a_vp; 639 struct uio *a_uio; 640 struct ucred *a_cred; 641 } */ *ap; 642 { 643 ISONODE *ip; 644 ISODIR *dirp; 645 ISOMNT *imp; 646 struct buf *bp; 647 struct uio *uio; 648 u_short symlen; 649 int error; 650 char *symname; 651 652 ip = VTOI(ap->a_vp); 653 imp = ip->i_mnt; 654 uio = ap->a_uio; 655 656 if (imp->iso_ftype != ISO_FTYPE_RRIP) 657 return (EINVAL); 658 659 /* 660 * Get parents directory record block that this inode included. 661 */ 662 error = bread(imp->im_devvp, 663 (ip->i_number >> imp->im_bshift) << 664 (imp->im_bshift - DEV_BSHIFT), 665 imp->logical_block_size, NOCRED, &bp); 666 if (error) { 667 brelse(bp); 668 return (EINVAL); 669 } 670 671 /* 672 * Setup the directory pointer for this inode 673 */ 674 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 675 676 /* 677 * Just make sure, we have a right one.... 678 * 1: Check not cross boundary on block 679 */ 680 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 681 > (unsigned)imp->logical_block_size) { 682 brelse(bp); 683 return (EINVAL); 684 } 685 686 /* 687 * Now get a buffer 688 * Abuse a namei buffer for now. 689 */ 690 if (uio->uio_segflg == UIO_SYSSPACE) 691 symname = uio->uio_iov->iov_base; 692 else 693 symname = uma_zalloc(namei_zone, M_WAITOK); 694 695 /* 696 * Ok, we just gathering a symbolic name in SL record. 697 */ 698 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 699 if (uio->uio_segflg != UIO_SYSSPACE) 700 uma_zfree(namei_zone, symname); 701 brelse(bp); 702 return (EINVAL); 703 } 704 /* 705 * Don't forget before you leave from home ;-) 706 */ 707 brelse(bp); 708 709 /* 710 * return with the symbolic name to caller's. 711 */ 712 if (uio->uio_segflg != UIO_SYSSPACE) { 713 error = uiomove(symname, symlen, uio); 714 uma_zfree(namei_zone, symname); 715 return (error); 716 } 717 uio->uio_resid -= symlen; 718 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 719 uio->uio_iov->iov_len -= symlen; 720 return (0); 721 } 722 723 /* 724 * Calculate the logical to physical mapping if not done already, 725 * then call the device strategy routine. 726 */ 727 static int 728 cd9660_strategy(ap) 729 struct vop_strategy_args /* { 730 struct buf *a_vp; 731 struct buf *a_bp; 732 } */ *ap; 733 { 734 struct buf *bp = ap->a_bp; 735 struct vnode *vp = ap->a_vp; 736 struct iso_node *ip; 737 struct bufobj *bo; 738 739 ip = VTOI(vp); 740 if (vp->v_type == VBLK || vp->v_type == VCHR) 741 panic("cd9660_strategy: spec"); 742 if (bp->b_blkno == bp->b_lblkno) { 743 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 744 (ip->i_mnt->im_bshift - DEV_BSHIFT); 745 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */ 746 clrbuf(bp); 747 } 748 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */ 749 bufdone(bp); 750 return (0); 751 } 752 bp->b_iooffset = dbtob(bp->b_blkno); 753 bo = ip->i_mnt->im_bo; 754 BO_STRATEGY(bo, bp); 755 return (0); 756 } 757 758 /* 759 * Return POSIX pathconf information applicable to cd9660 filesystems. 760 */ 761 static int 762 cd9660_pathconf(ap) 763 struct vop_pathconf_args /* { 764 struct vnode *a_vp; 765 int a_name; 766 register_t *a_retval; 767 } */ *ap; 768 { 769 770 switch (ap->a_name) { 771 case _PC_LINK_MAX: 772 *ap->a_retval = 1; 773 return (0); 774 case _PC_NAME_MAX: 775 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 776 *ap->a_retval = NAME_MAX; 777 else 778 *ap->a_retval = 37; 779 return (0); 780 case _PC_PATH_MAX: 781 *ap->a_retval = PATH_MAX; 782 return (0); 783 case _PC_PIPE_BUF: 784 *ap->a_retval = PIPE_BUF; 785 return (0); 786 case _PC_CHOWN_RESTRICTED: 787 *ap->a_retval = 1; 788 return (0); 789 case _PC_NO_TRUNC: 790 *ap->a_retval = 1; 791 return (0); 792 default: 793 return (EINVAL); 794 } 795 /* NOTREACHED */ 796 } 797 798 /* 799 * Global vfs data structures for cd9660 800 */ 801 struct vop_vector cd9660_vnodeops = { 802 .vop_default = &default_vnodeops, 803 .vop_open = cd9660_open, 804 .vop_access = cd9660_access, 805 .vop_bmap = cd9660_bmap, 806 .vop_cachedlookup = cd9660_lookup, 807 .vop_getattr = cd9660_getattr, 808 .vop_inactive = cd9660_inactive, 809 .vop_ioctl = cd9660_ioctl, 810 .vop_lookup = vfs_cache_lookup, 811 .vop_pathconf = cd9660_pathconf, 812 .vop_read = cd9660_read, 813 .vop_readdir = cd9660_readdir, 814 .vop_readlink = cd9660_readlink, 815 .vop_reclaim = cd9660_reclaim, 816 .vop_setattr = cd9660_setattr, 817 .vop_strategy = cd9660_strategy, 818 }; 819 820 /* 821 * Special device vnode ops 822 */ 823 824 struct vop_vector cd9660_fifoops = { 825 .vop_default = &fifo_specops, 826 .vop_access = cd9660_access, 827 .vop_getattr = cd9660_getattr, 828 .vop_inactive = cd9660_inactive, 829 .vop_reclaim = cd9660_reclaim, 830 .vop_setattr = cd9660_setattr, 831 }; 832