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/param.h> 38 #include <sys/systm.h> 39 #include <sys/namei.h> 40 #include <sys/kernel.h> 41 #include <sys/conf.h> 42 #include <sys/stat.h> 43 #include <sys/bio.h> 44 #include <sys/buf.h> 45 #include <sys/mount.h> 46 #include <sys/vnode.h> 47 #include <sys/malloc.h> 48 #include <sys/dirent.h> 49 #include <sys/unistd.h> 50 #include <sys/filio.h> 51 #include <sys/sysctl.h> 52 53 #include <vm/vm.h> 54 #include <vm/vnode_pager.h> 55 #include <vm/uma.h> 56 57 #include <fs/cd9660/iso.h> 58 #include <fs/cd9660/cd9660_node.h> 59 #include <fs/cd9660/cd9660_mount.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 accmode_t file_mode; 124 uid_t uid; 125 gid_t gid; 126 127 if (vp->v_type == VCHR || vp->v_type == VBLK) 128 return (EOPNOTSUPP); 129 130 /* 131 * Disallow write attempts unless the file is a socket, 132 * fifo, or a block or character device resident on the 133 * filesystem. 134 */ 135 if (accmode & VWRITE) { 136 switch (vp->v_type) { 137 case VDIR: 138 case VLNK: 139 case VREG: 140 return (EROFS); 141 /* NOT REACHED */ 142 default: 143 break; 144 } 145 } 146 147 file_mode = ip->inode.iso_mode; 148 file_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask; 149 150 uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ? 151 ip->i_mnt->im_uid : ip->inode.iso_uid; 152 gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ? 153 ip->i_mnt->im_gid : ip->inode.iso_gid; 154 155 return (vaccess(vp->v_type, file_mode, uid, 156 gid, ap->a_accmode, ap->a_cred)); 157 } 158 159 static int 160 cd9660_open(struct vop_open_args *ap) 161 { 162 struct vnode *vp = ap->a_vp; 163 struct iso_node *ip = VTOI(vp); 164 165 if (vp->v_type == VCHR || vp->v_type == VBLK) 166 return (EOPNOTSUPP); 167 168 vnode_create_vobject(vp, ip->i_size, ap->a_td); 169 return (0); 170 } 171 172 static int 173 cd9660_getattr(struct vop_getattr_args *ap) 174 175 { 176 struct vnode *vp = ap->a_vp; 177 struct vattr *vap = ap->a_vap; 178 struct iso_node *ip = VTOI(vp); 179 180 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 181 vap->va_fileid = ip->i_number; 182 183 vap->va_mode = ip->inode.iso_mode; 184 vap->va_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask; 185 186 vap->va_nlink = ip->inode.iso_links; 187 vap->va_uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ? 188 ip->i_mnt->im_uid : ip->inode.iso_uid; 189 vap->va_gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ? 190 ip->i_mnt->im_gid : ip->inode.iso_gid; 191 vap->va_atime = ip->inode.iso_atime; 192 vap->va_mtime = ip->inode.iso_mtime; 193 vap->va_ctime = ip->inode.iso_ctime; 194 vap->va_rdev = ip->inode.iso_rdev; 195 196 vap->va_size = (u_quad_t) ip->i_size; 197 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 198 struct vop_readlink_args rdlnk; 199 struct iovec aiov; 200 struct uio auio; 201 char *cp; 202 203 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 204 aiov.iov_base = cp; 205 aiov.iov_len = MAXPATHLEN; 206 auio.uio_iov = &aiov; 207 auio.uio_iovcnt = 1; 208 auio.uio_offset = 0; 209 auio.uio_rw = UIO_READ; 210 auio.uio_segflg = UIO_SYSSPACE; 211 auio.uio_td = curthread; 212 auio.uio_resid = MAXPATHLEN; 213 rdlnk.a_uio = &auio; 214 rdlnk.a_vp = ap->a_vp; 215 rdlnk.a_cred = ap->a_cred; 216 if (cd9660_readlink(&rdlnk) == 0) 217 vap->va_size = MAXPATHLEN - auio.uio_resid; 218 free(cp, M_TEMP); 219 } 220 vap->va_flags = 0; 221 vap->va_gen = 1; 222 vap->va_blocksize = ip->i_mnt->logical_block_size; 223 vap->va_bytes = (u_quad_t) ip->i_size; 224 vap->va_type = vp->v_type; 225 vap->va_filerev = 0; 226 return (0); 227 } 228 229 /* 230 * Vnode op for ioctl. 231 */ 232 static int 233 cd9660_ioctl(struct vop_ioctl_args *ap) 234 { 235 struct vnode *vp; 236 struct iso_node *ip; 237 int error; 238 239 vp = ap->a_vp; 240 vn_lock(vp, LK_SHARED | LK_RETRY); 241 if (VN_IS_DOOMED(vp)) { 242 VOP_UNLOCK(vp); 243 return (EBADF); 244 } 245 if (vp->v_type == VCHR || vp->v_type == VBLK) { 246 VOP_UNLOCK(vp); 247 return (EOPNOTSUPP); 248 } 249 250 ip = VTOI(vp); 251 error = 0; 252 253 switch (ap->a_command) { 254 case FIOGETLBA: 255 *(int *)(ap->a_data) = ip->iso_start; 256 break; 257 default: 258 error = ENOTTY; 259 break; 260 } 261 262 VOP_UNLOCK(vp); 263 return (error); 264 } 265 266 /* 267 * Vnode op for reading. 268 */ 269 static int 270 cd9660_read(struct vop_read_args *ap) 271 { 272 struct vnode *vp = ap->a_vp; 273 struct uio *uio = ap->a_uio; 274 struct iso_node *ip = VTOI(vp); 275 struct iso_mnt *imp; 276 struct buf *bp; 277 daddr_t lbn, rablock; 278 off_t diff; 279 int rasize, error = 0; 280 int seqcount; 281 long size, n, on; 282 283 if (vp->v_type == VCHR || vp->v_type == VBLK) 284 return (EOPNOTSUPP); 285 286 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 287 288 if (uio->uio_resid == 0) 289 return (0); 290 if (uio->uio_offset < 0) 291 return (EINVAL); 292 imp = ip->i_mnt; 293 do { 294 lbn = lblkno(imp, uio->uio_offset); 295 on = blkoff(imp, uio->uio_offset); 296 n = MIN(imp->logical_block_size - on, uio->uio_resid); 297 diff = (off_t)ip->i_size - uio->uio_offset; 298 if (diff <= 0) 299 return (0); 300 if (diff < n) 301 n = diff; 302 size = blksize(imp, ip, lbn); 303 rablock = lbn + 1; 304 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 305 if (lblktosize(imp, rablock) < ip->i_size) 306 error = cluster_read(vp, (off_t)ip->i_size, 307 lbn, size, NOCRED, uio->uio_resid, 308 (ap->a_ioflag >> 16), 0, &bp); 309 else 310 error = bread(vp, lbn, size, NOCRED, &bp); 311 } else { 312 if (seqcount > 1 && 313 lblktosize(imp, rablock) < ip->i_size) { 314 rasize = blksize(imp, ip, rablock); 315 error = breadn(vp, lbn, size, &rablock, 316 &rasize, 1, NOCRED, &bp); 317 } else 318 error = bread(vp, lbn, size, NOCRED, &bp); 319 } 320 if (error != 0) 321 return (error); 322 n = MIN(n, size - bp->b_resid); 323 324 error = uiomove(bp->b_data + on, (int)n, uio); 325 brelse(bp); 326 } while (error == 0 && uio->uio_resid > 0 && n != 0); 327 return (error); 328 } 329 330 /* 331 * Structure for reading directories 332 */ 333 struct isoreaddir { 334 struct dirent saveent; 335 struct dirent assocent; 336 struct dirent current; 337 off_t saveoff; 338 off_t assocoff; 339 off_t curroff; 340 struct uio *uio; 341 off_t uio_off; 342 int eofflag; 343 uint64_t *cookies; 344 int ncookies; 345 }; 346 347 static int 348 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 349 { 350 int error; 351 352 dp->d_reclen = GENERIC_DIRSIZ(dp); 353 dirent_terminate(dp); 354 355 if (idp->uio->uio_resid < dp->d_reclen) { 356 idp->eofflag = 0; 357 return (-1); 358 } 359 360 if (idp->cookies) { 361 if (idp->ncookies <= 0) { 362 idp->eofflag = 0; 363 return (-1); 364 } 365 366 *idp->cookies++ = off; 367 --idp->ncookies; 368 } 369 370 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 371 return (error); 372 idp->uio_off = off; 373 return (0); 374 } 375 376 static int 377 iso_shipdir(struct isoreaddir *idp) 378 { 379 struct dirent *dp; 380 int cl, sl, assoc; 381 int error; 382 char *cname, *sname; 383 384 cl = idp->current.d_namlen; 385 cname = idp->current.d_name; 386 assoc = (cl > 1) && (*cname == ASSOCCHAR); 387 if (assoc) { 388 cl--; 389 cname++; 390 } 391 392 dp = &idp->saveent; 393 sname = dp->d_name; 394 if (!(sl = dp->d_namlen)) { 395 dp = &idp->assocent; 396 sname = dp->d_name + 1; 397 sl = dp->d_namlen - 1; 398 } 399 if (sl > 0) { 400 if (sl != cl 401 || bcmp(sname,cname,sl)) { 402 if (idp->assocent.d_namlen) { 403 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 404 return (error); 405 idp->assocent.d_namlen = 0; 406 } 407 if (idp->saveent.d_namlen) { 408 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 409 return (error); 410 idp->saveent.d_namlen = 0; 411 } 412 } 413 } 414 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 415 if (assoc) { 416 idp->assocoff = idp->curroff; 417 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 418 } else { 419 idp->saveoff = idp->curroff; 420 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 421 } 422 return (0); 423 } 424 425 /* 426 * Vnode op for readdir 427 */ 428 static int 429 cd9660_readdir(struct vop_readdir_args *ap) 430 { 431 struct uio *uio = ap->a_uio; 432 struct isoreaddir *idp; 433 struct vnode *vdp = ap->a_vp; 434 struct iso_node *dp; 435 struct iso_mnt *imp; 436 struct buf *bp = NULL; 437 struct iso_directory_record *ep; 438 int entryoffsetinblock; 439 doff_t endsearch; 440 u_long bmask; 441 int error = 0; 442 int reclen; 443 u_short namelen; 444 u_int ncookies = 0; 445 uint64_t *cookies = NULL; 446 cd_ino_t ino; 447 448 dp = VTOI(vdp); 449 imp = dp->i_mnt; 450 bmask = imp->im_bmask; 451 452 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 453 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 454 /* 455 * XXX 456 * Is it worth trying to figure out the type? 457 */ 458 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 459 DT_UNKNOWN; 460 idp->uio = uio; 461 if (ap->a_ncookies == NULL) { 462 idp->cookies = NULL; 463 } else { 464 /* 465 * Guess the number of cookies needed. 466 */ 467 ncookies = uio->uio_resid / 16; 468 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 469 idp->cookies = cookies; 470 idp->ncookies = ncookies; 471 } 472 idp->eofflag = 1; 473 idp->curroff = uio->uio_offset; 474 idp->uio_off = uio->uio_offset; 475 476 if ((entryoffsetinblock = idp->curroff & bmask) && 477 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 478 free(idp, M_TEMP); 479 return (error); 480 } 481 endsearch = dp->i_size; 482 483 while (idp->curroff < endsearch) { 484 /* 485 * If offset is on a block boundary, 486 * read the next directory block. 487 * Release previous if it exists. 488 */ 489 if ((idp->curroff & bmask) == 0) { 490 if (bp != NULL) 491 brelse(bp); 492 if ((error = 493 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 494 break; 495 entryoffsetinblock = 0; 496 } 497 /* 498 * Get pointer to next entry. 499 */ 500 ep = (struct iso_directory_record *) 501 ((char *)bp->b_data + entryoffsetinblock); 502 503 reclen = isonum_711(ep->length); 504 if (reclen == 0) { 505 /* skip to next block, if any */ 506 idp->curroff = 507 (idp->curroff & ~bmask) + imp->logical_block_size; 508 continue; 509 } 510 511 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 512 error = EINVAL; 513 /* illegal entry, stop */ 514 break; 515 } 516 517 if (entryoffsetinblock + reclen > imp->logical_block_size) { 518 error = EINVAL; 519 /* illegal directory, so stop looking */ 520 break; 521 } 522 523 idp->current.d_namlen = isonum_711(ep->name_len); 524 525 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 526 error = EINVAL; 527 /* illegal entry, stop */ 528 break; 529 } 530 531 if (isonum_711(ep->flags)&2) 532 idp->current.d_fileno = isodirino(ep, imp); 533 else 534 idp->current.d_fileno = dbtob(bp->b_blkno) + 535 entryoffsetinblock; 536 537 idp->curroff += reclen; 538 /* NOTE: d_off is the offset of *next* entry. */ 539 idp->current.d_off = idp->curroff; 540 541 switch (imp->iso_ftype) { 542 case ISO_FTYPE_RRIP: 543 ino = idp->current.d_fileno; 544 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 545 &ino, imp); 546 idp->current.d_fileno = ino; 547 idp->current.d_namlen = (u_char)namelen; 548 if (idp->current.d_namlen) 549 error = iso_uiodir(idp,&idp->current,idp->curroff); 550 break; 551 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 552 strcpy(idp->current.d_name,".."); 553 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 554 idp->current.d_namlen = 1; 555 error = iso_uiodir(idp,&idp->current,idp->curroff); 556 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 557 idp->current.d_namlen = 2; 558 error = iso_uiodir(idp,&idp->current,idp->curroff); 559 } else { 560 isofntrans(ep->name,idp->current.d_namlen, 561 idp->current.d_name, &namelen, 562 imp->iso_ftype == ISO_FTYPE_9660, 563 isonum_711(ep->flags)&4, 564 imp->joliet_level, 565 imp->im_flags, 566 imp->im_d2l); 567 idp->current.d_namlen = (u_char)namelen; 568 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 569 error = iso_shipdir(idp); 570 else 571 error = iso_uiodir(idp,&idp->current,idp->curroff); 572 } 573 } 574 if (error) 575 break; 576 577 entryoffsetinblock += reclen; 578 } 579 580 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 581 idp->current.d_namlen = 0; 582 error = iso_shipdir(idp); 583 } 584 if (error < 0) 585 error = 0; 586 587 if (ap->a_ncookies != NULL) { 588 if (error) 589 free(cookies, M_TEMP); 590 else { 591 /* 592 * Work out the number of cookies actually used. 593 */ 594 *ap->a_ncookies = ncookies - idp->ncookies; 595 *ap->a_cookies = cookies; 596 } 597 } 598 599 if (bp) 600 brelse (bp); 601 602 uio->uio_offset = idp->uio_off; 603 *ap->a_eofflag = idp->eofflag; 604 605 free(idp, M_TEMP); 606 607 return (error); 608 } 609 610 /* 611 * Return target name of a symbolic link 612 * Shouldn't we get the parent vnode and read the data from there? 613 * This could eventually result in deadlocks in cd9660_lookup. 614 * But otherwise the block read here is in the block buffer two times. 615 */ 616 typedef struct iso_directory_record ISODIR; 617 typedef struct iso_node ISONODE; 618 typedef struct iso_mnt ISOMNT; 619 static int 620 cd9660_readlink(struct vop_readlink_args *ap) 621 { 622 ISONODE *ip; 623 ISODIR *dirp; 624 ISOMNT *imp; 625 struct buf *bp; 626 struct uio *uio; 627 u_short symlen; 628 int error; 629 char *symname; 630 631 ip = VTOI(ap->a_vp); 632 imp = ip->i_mnt; 633 uio = ap->a_uio; 634 635 if (imp->iso_ftype != ISO_FTYPE_RRIP) 636 return (EINVAL); 637 638 /* 639 * Get parents directory record block that this inode included. 640 */ 641 error = bread(imp->im_devvp, 642 (ip->i_number >> imp->im_bshift) << 643 (imp->im_bshift - DEV_BSHIFT), 644 imp->logical_block_size, NOCRED, &bp); 645 if (error) { 646 return (EINVAL); 647 } 648 649 /* 650 * Setup the directory pointer for this inode 651 */ 652 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 653 654 /* 655 * Just make sure, we have a right one.... 656 * 1: Check not cross boundary on block 657 */ 658 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 659 > (unsigned)imp->logical_block_size) { 660 brelse(bp); 661 return (EINVAL); 662 } 663 664 /* 665 * Now get a buffer 666 * Abuse a namei buffer for now. 667 */ 668 if (uio->uio_segflg == UIO_SYSSPACE) 669 symname = uio->uio_iov->iov_base; 670 else 671 symname = uma_zalloc(namei_zone, M_WAITOK); 672 673 /* 674 * Ok, we just gathering a symbolic name in SL record. 675 */ 676 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 677 if (uio->uio_segflg != UIO_SYSSPACE) 678 uma_zfree(namei_zone, symname); 679 brelse(bp); 680 return (EINVAL); 681 } 682 /* 683 * Don't forget before you leave from home ;-) 684 */ 685 brelse(bp); 686 687 /* 688 * return with the symbolic name to caller's. 689 */ 690 if (uio->uio_segflg != UIO_SYSSPACE) { 691 error = uiomove(symname, symlen, uio); 692 uma_zfree(namei_zone, symname); 693 return (error); 694 } 695 uio->uio_resid -= symlen; 696 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 697 uio->uio_iov->iov_len -= symlen; 698 return (0); 699 } 700 701 /* 702 * Calculate the logical to physical mapping if not done already, 703 * then call the device strategy routine. 704 */ 705 static int 706 cd9660_strategy(struct vop_strategy_args *ap) 707 { 708 struct buf *bp = ap->a_bp; 709 struct vnode *vp = ap->a_vp; 710 struct iso_node *ip; 711 struct bufobj *bo; 712 713 ip = VTOI(vp); 714 if (vp->v_type == VBLK || vp->v_type == VCHR) 715 panic("cd9660_strategy: spec"); 716 if (bp->b_blkno == bp->b_lblkno) { 717 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 718 (ip->i_mnt->im_bshift - DEV_BSHIFT); 719 } 720 bp->b_iooffset = dbtob(bp->b_blkno); 721 bo = ip->i_mnt->im_bo; 722 BO_STRATEGY(bo, bp); 723 return (0); 724 } 725 726 /* 727 * Return POSIX pathconf information applicable to cd9660 filesystems. 728 */ 729 static int 730 cd9660_pathconf(struct vop_pathconf_args *ap) 731 { 732 733 switch (ap->a_name) { 734 case _PC_FILESIZEBITS: 735 *ap->a_retval = 32; 736 return (0); 737 case _PC_LINK_MAX: 738 *ap->a_retval = 1; 739 return (0); 740 case _PC_NAME_MAX: 741 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 742 *ap->a_retval = NAME_MAX; 743 else 744 *ap->a_retval = 37; 745 return (0); 746 case _PC_SYMLINK_MAX: 747 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 748 *ap->a_retval = MAXPATHLEN; 749 return (0); 750 } 751 return (EINVAL); 752 case _PC_NO_TRUNC: 753 *ap->a_retval = 1; 754 return (0); 755 default: 756 return (vop_stdpathconf(ap)); 757 } 758 /* NOTREACHED */ 759 } 760 761 /* 762 * Vnode pointer to File handle 763 */ 764 static int 765 cd9660_vptofh(struct vop_vptofh_args *ap) 766 { 767 struct ifid ifh; 768 struct iso_node *ip = VTOI(ap->a_vp); 769 770 ifh.ifid_len = sizeof(struct ifid); 771 772 ifh.ifid_ino = ip->i_number; 773 ifh.ifid_start = ip->iso_start; 774 /* 775 * This intentionally uses sizeof(ifh) in order to not copy stack 776 * garbage on ILP32. 777 */ 778 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 779 780 #ifdef ISOFS_DBG 781 printf("vptofh: ino %jd, start %ld\n", 782 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 783 #endif 784 785 return (0); 786 } 787 788 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 789 "cd9660 filesystem"); 790 static int use_buf_pager = 1; 791 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 792 &use_buf_pager, 0, 793 "Use buffer pager instead of bmap"); 794 795 static daddr_t 796 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 797 { 798 799 return (lblkno(VTOI(vp)->i_mnt, off)); 800 } 801 802 static int 803 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz) 804 { 805 struct iso_node *ip; 806 807 ip = VTOI(vp); 808 *sz = blksize(ip->i_mnt, ip, lbn); 809 return (0); 810 } 811 812 static int 813 cd9660_getpages(struct vop_getpages_args *ap) 814 { 815 struct vnode *vp; 816 817 vp = ap->a_vp; 818 if (vp->v_type == VCHR || vp->v_type == VBLK) 819 return (EOPNOTSUPP); 820 821 if (use_buf_pager) 822 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 823 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 824 cd9660_gbp_getblksz)); 825 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 826 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 827 } 828 829 /* 830 * Global vfs data structures for cd9660 831 */ 832 struct vop_vector cd9660_vnodeops = { 833 .vop_default = &default_vnodeops, 834 .vop_open = cd9660_open, 835 .vop_access = cd9660_access, 836 .vop_bmap = cd9660_bmap, 837 .vop_cachedlookup = cd9660_lookup, 838 .vop_getattr = cd9660_getattr, 839 .vop_inactive = cd9660_inactive, 840 .vop_ioctl = cd9660_ioctl, 841 .vop_lookup = vfs_cache_lookup, 842 .vop_pathconf = cd9660_pathconf, 843 .vop_read = cd9660_read, 844 .vop_readdir = cd9660_readdir, 845 .vop_readlink = cd9660_readlink, 846 .vop_reclaim = cd9660_reclaim, 847 .vop_setattr = cd9660_setattr, 848 .vop_strategy = cd9660_strategy, 849 .vop_vptofh = cd9660_vptofh, 850 .vop_getpages = cd9660_getpages, 851 }; 852 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops); 853 854 /* 855 * Special device vnode ops 856 */ 857 858 struct vop_vector cd9660_fifoops = { 859 .vop_default = &fifo_specops, 860 .vop_access = cd9660_access, 861 .vop_getattr = cd9660_getattr, 862 .vop_inactive = cd9660_inactive, 863 .vop_reclaim = cd9660_reclaim, 864 .vop_setattr = cd9660_setattr, 865 .vop_vptofh = cd9660_vptofh, 866 }; 867 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops); 868