1 /* $OpenBSD: cd9660_vnops.c,v 1.85 2020/06/11 09:18:43 mpi Exp $ */ 2 /* $NetBSD: cd9660_vnops.c,v 1.42 1997/10/16 23:56:57 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley 9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 10 * Support code is derived from software contributed to Berkeley 11 * by Atsushi Murai (amurai@spec.co.jp). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)cd9660_vnops.c 8.15 (Berkeley) 12/5/94 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/resourcevar.h> 44 #include <sys/kernel.h> 45 #include <sys/file.h> 46 #include <sys/stat.h> 47 #include <sys/buf.h> 48 #include <sys/conf.h> 49 #include <sys/mount.h> 50 #include <sys/vnode.h> 51 #include <sys/lock.h> 52 #include <sys/malloc.h> 53 #include <sys/pool.h> 54 #include <sys/dirent.h> 55 #include <sys/ioctl.h> 56 #include <sys/ioccom.h> 57 #include <sys/poll.h> 58 #include <sys/specdev.h> 59 #include <sys/unistd.h> 60 61 #include <miscfs/fifofs/fifo.h> 62 63 #include <isofs/cd9660/iso.h> 64 #include <isofs/cd9660/cd9660_extern.h> 65 #include <isofs/cd9660/cd9660_node.h> 66 #include <isofs/cd9660/iso_rrip.h> 67 68 int cd9660_kqfilter(void *v); 69 70 71 /* 72 * Structure for reading directories 73 */ 74 struct isoreaddir { 75 struct dirent saveent; 76 struct dirent assocent; 77 struct dirent current; 78 off_t saveoff; 79 off_t assocoff; 80 off_t curroff; 81 struct uio *uio; 82 off_t uio_off; 83 int eofflag; 84 }; 85 86 int iso_uiodir(struct isoreaddir *, struct dirent *, off_t); 87 int iso_shipdir(struct isoreaddir *); 88 89 /* 90 * Setattr call. Only allowed for block and character special devices. 91 */ 92 int 93 cd9660_setattr(void *v) 94 { 95 struct vop_setattr_args *ap = v; 96 struct vnode *vp = ap->a_vp; 97 struct vattr *vap = ap->a_vap; 98 99 if (vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 100 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_nsec != VNOVAL || 101 vap->va_mtime.tv_nsec != VNOVAL || vap->va_mode != (mode_t)VNOVAL || 102 (vap->va_vaflags & VA_UTIMES_CHANGE)) 103 return (EROFS); 104 if (vap->va_size != VNOVAL) { 105 switch (vp->v_type) { 106 case VDIR: 107 return (EISDIR); 108 case VLNK: 109 case VREG: 110 return (EROFS); 111 case VCHR: 112 case VBLK: 113 case VSOCK: 114 case VFIFO: 115 return (0); 116 default: 117 return (EINVAL); 118 } 119 } 120 121 return (EINVAL); 122 } 123 124 /* 125 * Open called. 126 * 127 * Nothing to do. 128 */ 129 /* ARGSUSED */ 130 int 131 cd9660_open(void *v) 132 { 133 return (0); 134 } 135 136 /* 137 * Close called 138 * 139 * Update the times on the inode on writeable file systems. 140 */ 141 /* ARGSUSED */ 142 int 143 cd9660_close(void *v) 144 { 145 return (0); 146 } 147 148 /* 149 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 150 * The mode is shifted to select the owner/group/other fields. The 151 * super user is granted all permissions. 152 */ 153 int 154 cd9660_access(void *v) 155 { 156 struct vop_access_args *ap = v; 157 struct iso_node *ip = VTOI(ap->a_vp); 158 159 return (vaccess(ap->a_vp->v_type, ip->inode.iso_mode & ALLPERMS, 160 ip->inode.iso_uid, ip->inode.iso_gid, ap->a_mode, ap->a_cred)); 161 } 162 163 int 164 cd9660_getattr(void *v) 165 { 166 struct vop_getattr_args *ap = v; 167 struct vnode *vp = ap->a_vp; 168 register struct vattr *vap = ap->a_vap; 169 register struct iso_node *ip = VTOI(vp); 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_nlink = ip->inode.iso_links; 176 vap->va_uid = ip->inode.iso_uid; 177 vap->va_gid = ip->inode.iso_gid; 178 vap->va_atime = ip->inode.iso_atime; 179 vap->va_mtime = ip->inode.iso_mtime; 180 vap->va_ctime = ip->inode.iso_ctime; 181 vap->va_rdev = ip->inode.iso_rdev; 182 183 vap->va_size = (u_quad_t) ip->i_size; 184 if (ip->i_size == 0 && vp->v_type == VLNK) { 185 struct vop_readlink_args rdlnk; 186 struct iovec aiov; 187 struct uio auio; 188 char *cp; 189 190 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 191 aiov.iov_base = cp; 192 aiov.iov_len = MAXPATHLEN; 193 auio.uio_iov = &aiov; 194 auio.uio_iovcnt = 1; 195 auio.uio_offset = 0; 196 auio.uio_rw = UIO_READ; 197 auio.uio_segflg = UIO_SYSSPACE; 198 auio.uio_procp = ap->a_p; 199 auio.uio_resid = MAXPATHLEN; 200 rdlnk.a_uio = &auio; 201 rdlnk.a_vp = ap->a_vp; 202 rdlnk.a_cred = ap->a_cred; 203 if (cd9660_readlink(&rdlnk) == 0) 204 vap->va_size = MAXPATHLEN - auio.uio_resid; 205 free(cp, M_TEMP, 0); 206 } 207 vap->va_flags = 0; 208 vap->va_gen = 1; 209 vap->va_blocksize = ip->i_mnt->logical_block_size; 210 vap->va_bytes = (u_quad_t) ip->i_size; 211 vap->va_type = vp->v_type; 212 return (0); 213 } 214 215 /* 216 * Vnode op for reading. 217 */ 218 int 219 cd9660_read(void *v) 220 { 221 struct vop_read_args *ap = v; 222 struct vnode *vp = ap->a_vp; 223 register struct uio *uio = ap->a_uio; 224 register struct iso_node *ip = VTOI(vp); 225 register struct iso_mnt *imp; 226 struct buf *bp; 227 daddr_t lbn, rablock; 228 off_t diff; 229 int error = 0; 230 long size, on; 231 size_t n; 232 233 if (uio->uio_resid == 0) 234 return (0); 235 if (uio->uio_offset < 0) 236 return (EINVAL); 237 ip->i_flag |= IN_ACCESS; 238 imp = ip->i_mnt; 239 do { 240 struct cluster_info *ci = &ip->i_ci; 241 242 lbn = lblkno(imp, uio->uio_offset); 243 on = blkoff(imp, uio->uio_offset); 244 n = ulmin(imp->logical_block_size - on, uio->uio_resid); 245 diff = (off_t)ip->i_size - uio->uio_offset; 246 if (diff <= 0) 247 return (0); 248 if (diff < n) 249 n = diff; 250 size = blksize(imp, ip, lbn); 251 rablock = lbn + 1; 252 #define MAX_RA 32 253 if (ci->ci_lastr + 1 == lbn) { 254 struct ra { 255 daddr_t blks[MAX_RA]; 256 int sizes[MAX_RA]; 257 } *ra; 258 int i; 259 260 ra = malloc(sizeof *ra, M_TEMP, M_WAITOK); 261 for (i = 0; i < MAX_RA && 262 lblktosize(imp, (rablock + i)) < ip->i_size; 263 i++) { 264 ra->blks[i] = rablock + i; 265 ra->sizes[i] = blksize(imp, ip, rablock + i); 266 } 267 error = breadn(vp, lbn, size, ra->blks, 268 ra->sizes, i, &bp); 269 free(ra, M_TEMP, 0); 270 } else 271 error = bread(vp, lbn, size, &bp); 272 ci->ci_lastr = lbn; 273 n = ulmin(n, size - bp->b_resid); 274 if (error) { 275 brelse(bp); 276 return (error); 277 } 278 279 error = uiomove(bp->b_data + on, n, uio); 280 281 brelse(bp); 282 } while (error == 0 && uio->uio_resid > 0 && n != 0); 283 return (error); 284 } 285 286 /* ARGSUSED */ 287 int 288 cd9660_ioctl(void *v) 289 { 290 return (ENOTTY); 291 } 292 293 /* ARGSUSED */ 294 int 295 cd9660_poll(void *v) 296 { 297 struct vop_poll_args *ap = v; 298 299 /* 300 * We should really check to see if I/O is possible. 301 */ 302 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 303 } 304 305 /* 306 * Mmap a file 307 * 308 * NB Currently unsupported. 309 */ 310 /* ARGSUSED */ 311 int 312 cd9660_mmap(void *v) 313 { 314 315 return (EINVAL); 316 } 317 318 /* 319 * Seek on a file 320 * 321 * Nothing to do, so just return. 322 */ 323 /* ARGSUSED */ 324 int 325 cd9660_seek(void *v) 326 { 327 return (0); 328 } 329 330 int 331 iso_uiodir(idp,dp,off) 332 struct isoreaddir *idp; 333 struct dirent *dp; 334 off_t off; 335 { 336 int error; 337 338 dp->d_name[dp->d_namlen] = 0; 339 dp->d_reclen = DIRENT_SIZE(dp); 340 341 if (idp->uio->uio_resid < dp->d_reclen) { 342 idp->eofflag = 0; 343 return (-1); 344 } 345 346 dp->d_off = off; 347 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 348 return (error); 349 idp->uio_off = off; 350 return (0); 351 } 352 353 int 354 iso_shipdir(idp) 355 struct isoreaddir *idp; 356 { 357 struct dirent *dp; 358 int cl, sl, assoc; 359 int error; 360 char *cname, *sname; 361 362 cl = idp->current.d_namlen; 363 cname = idp->current.d_name; 364 365 if ((assoc = cl > 1 && *cname == ASSOCCHAR)) { 366 cl--; 367 cname++; 368 } 369 370 dp = &idp->saveent; 371 sname = dp->d_name; 372 if (!(sl = dp->d_namlen)) { 373 dp = &idp->assocent; 374 sname = dp->d_name + 1; 375 sl = dp->d_namlen - 1; 376 } 377 if (sl > 0) { 378 if (sl != cl 379 || bcmp(sname,cname,sl)) { 380 if (idp->assocent.d_namlen) { 381 error = iso_uiodir(idp, &idp->assocent, 382 idp->assocoff); 383 if (error) 384 return (error); 385 idp->assocent.d_namlen = 0; 386 } 387 if (idp->saveent.d_namlen) { 388 error = iso_uiodir(idp, &idp->saveent, 389 idp->saveoff); 390 if (error) 391 return (error); 392 idp->saveent.d_namlen = 0; 393 } 394 } 395 } 396 idp->current.d_reclen = DIRENT_SIZE(&idp->current); 397 if (assoc) { 398 idp->assocoff = idp->curroff; 399 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 400 } else { 401 idp->saveoff = idp->curroff; 402 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 403 } 404 return (0); 405 } 406 407 /* 408 * Vnode op for readdir 409 */ 410 int 411 cd9660_readdir(void *v) 412 { 413 struct vop_readdir_args *ap = v; 414 register struct uio *uio = ap->a_uio; 415 struct isoreaddir *idp; 416 struct vnode *vdp = ap->a_vp; 417 struct iso_node *dp; 418 struct iso_mnt *imp; 419 struct buf *bp = NULL; 420 struct iso_directory_record *ep; 421 int entryoffsetinblock; 422 doff_t endsearch; 423 u_long bmask; 424 int error = 0; 425 int reclen; 426 u_short namelen; 427 cdino_t ino; 428 429 dp = VTOI(vdp); 430 imp = dp->i_mnt; 431 bmask = imp->im_bmask; 432 433 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 434 435 /* 436 * These are passed to copyout(), so make sure there's no garbage 437 * being leaked in padding or after short names. 438 */ 439 memset(&idp->saveent, 0, sizeof(idp->saveent)); 440 memset(&idp->assocent, 0, sizeof(idp->assocent)); 441 memset(&idp->current, 0, sizeof(idp->current)); 442 443 /* 444 * XXX 445 * Is it worth trying to figure out the type? 446 */ 447 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 448 DT_UNKNOWN; 449 idp->uio = uio; 450 idp->eofflag = 1; 451 idp->curroff = uio->uio_offset; 452 idp->uio_off = uio->uio_offset; 453 454 if ((entryoffsetinblock = idp->curroff & bmask) && 455 (error = cd9660_bufatoff(dp, (off_t)idp->curroff, NULL, &bp))) { 456 free(idp, M_TEMP, 0); 457 return (error); 458 } 459 endsearch = dp->i_size; 460 461 while (idp->curroff < endsearch) { 462 /* 463 * If offset is on a block boundary, 464 * read the next directory block. 465 * Release previous if it exists. 466 */ 467 if ((idp->curroff & bmask) == 0) { 468 if (bp != NULL) 469 brelse(bp); 470 error = cd9660_bufatoff(dp, (off_t)idp->curroff, 471 NULL, &bp); 472 if (error) 473 break; 474 entryoffsetinblock = 0; 475 } 476 /* 477 * Get pointer to next entry. 478 */ 479 ep = (struct iso_directory_record *) 480 ((char *)bp->b_data + entryoffsetinblock); 481 482 reclen = isonum_711(ep->length); 483 if (reclen == 0) { 484 /* skip to next block, if any */ 485 idp->curroff = 486 (idp->curroff & ~bmask) + imp->logical_block_size; 487 continue; 488 } 489 490 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 491 error = EINVAL; 492 /* illegal entry, stop */ 493 break; 494 } 495 496 if (entryoffsetinblock + reclen > imp->logical_block_size) { 497 error = EINVAL; 498 /* illegal directory, so stop looking */ 499 break; 500 } 501 502 idp->current.d_namlen = isonum_711(ep->name_len); 503 504 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 505 error = EINVAL; 506 /* illegal entry, stop */ 507 break; 508 } 509 510 if (isonum_711(ep->flags)&2) 511 ino = isodirino(ep, imp); 512 else 513 ino = dbtob(bp->b_blkno) + entryoffsetinblock; 514 515 idp->curroff += reclen; 516 517 switch (imp->iso_ftype) { 518 case ISO_FTYPE_RRIP: 519 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 520 &ino, imp); 521 idp->current.d_fileno = ino; 522 idp->current.d_namlen = (u_char)namelen; 523 if (idp->current.d_namlen) 524 error = iso_uiodir(idp,&idp->current,idp->curroff); 525 break; 526 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */ 527 idp->current.d_fileno = ino; 528 strlcpy(idp->current.d_name,"..", 529 sizeof idp->current.d_name); 530 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 531 idp->current.d_namlen = 1; 532 error = iso_uiodir(idp,&idp->current,idp->curroff); 533 } else if (idp->current.d_namlen == 1 && 534 ep->name[0] == 1) { 535 idp->current.d_namlen = 2; 536 error = iso_uiodir(idp,&idp->current,idp->curroff); 537 } else { 538 isofntrans(ep->name,idp->current.d_namlen, 539 idp->current.d_name, &namelen, 540 imp->iso_ftype == ISO_FTYPE_9660, 541 isonum_711(ep->flags) & 4, 542 imp->joliet_level); 543 idp->current.d_namlen = (u_char)namelen; 544 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 545 error = iso_shipdir(idp); 546 else 547 error = iso_uiodir(idp,&idp->current,idp->curroff); 548 } 549 } 550 if (error) 551 break; 552 553 entryoffsetinblock += reclen; 554 } 555 556 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 557 idp->current.d_namlen = 0; 558 error = iso_shipdir(idp); 559 } 560 if (error < 0) 561 error = 0; 562 563 if (bp) 564 brelse (bp); 565 566 uio->uio_offset = idp->uio_off; 567 *ap->a_eofflag = idp->eofflag; 568 569 free(idp, M_TEMP, 0); 570 571 return (error); 572 } 573 574 /* 575 * Return target name of a symbolic link 576 * Shouldn't we get the parent vnode and read the data from there? 577 * This could eventually result in deadlocks in cd9660_lookup. 578 * But otherwise the block read here is in the block buffer two times. 579 */ 580 typedef struct iso_directory_record ISODIR; 581 typedef struct iso_node ISONODE; 582 typedef struct iso_mnt ISOMNT; 583 int 584 cd9660_readlink(void *v) 585 { 586 struct vop_readlink_args *ap = v; 587 ISONODE *ip; 588 ISODIR *dirp; 589 ISOMNT *imp; 590 struct buf *bp; 591 struct uio *uio; 592 u_short symlen; 593 int error; 594 char *symname; 595 596 ip = VTOI(ap->a_vp); 597 imp = ip->i_mnt; 598 uio = ap->a_uio; 599 600 if (imp->iso_ftype != ISO_FTYPE_RRIP) 601 return (EINVAL); 602 603 /* 604 * Get parents directory record block that this inode included. 605 */ 606 error = bread(imp->im_devvp, 607 (ip->i_number >> imp->im_bshift) << 608 (imp->im_bshift - DEV_BSHIFT), 609 imp->logical_block_size, &bp); 610 if (error) { 611 brelse(bp); 612 return (EINVAL); 613 } 614 615 /* 616 * Setup the directory pointer for this inode 617 */ 618 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 619 620 /* 621 * Just make sure, we have a right one.... 622 * 1: Check not cross boundary on block 623 */ 624 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 625 > imp->logical_block_size) { 626 brelse(bp); 627 return (EINVAL); 628 } 629 630 /* 631 * Now get a buffer 632 * Abuse a namei buffer for now. 633 */ 634 if (uio->uio_segflg == UIO_SYSSPACE && 635 uio->uio_iov->iov_len >= MAXPATHLEN) 636 symname = uio->uio_iov->iov_base; 637 else 638 symname = pool_get(&namei_pool, PR_WAITOK); 639 640 /* 641 * Ok, we just gathering a symbolic name in SL record. 642 */ 643 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 644 if (uio->uio_segflg != UIO_SYSSPACE || 645 uio->uio_iov->iov_len < MAXPATHLEN) 646 pool_put(&namei_pool, symname); 647 brelse(bp); 648 return (EINVAL); 649 } 650 /* 651 * Don't forget before you leave from home ;-) 652 */ 653 brelse(bp); 654 655 /* 656 * return with the symbolic name to caller's. 657 */ 658 if (uio->uio_segflg != UIO_SYSSPACE || 659 uio->uio_iov->iov_len < MAXPATHLEN) { 660 error = uiomove(symname, symlen, uio); 661 pool_put(&namei_pool, symname); 662 return (error); 663 } 664 uio->uio_resid -= symlen; 665 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 666 uio->uio_iov->iov_len -= symlen; 667 return (0); 668 } 669 670 int 671 cd9660_link(void *v) 672 { 673 struct vop_link_args *ap = v; 674 675 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 676 vput(ap->a_dvp); 677 return (EROFS); 678 } 679 680 int 681 cd9660_symlink(void *v) 682 { 683 struct vop_symlink_args *ap = v; 684 685 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 686 vput(ap->a_dvp); 687 return (EROFS); 688 } 689 690 /* 691 * Lock an inode. 692 */ 693 int 694 cd9660_lock(void *v) 695 { 696 struct vop_lock_args *ap = v; 697 struct vnode *vp = ap->a_vp; 698 699 return rrw_enter(&VTOI(vp)->i_lock, ap->a_flags & LK_RWFLAGS); 700 } 701 702 /* 703 * Unlock an inode. 704 */ 705 int 706 cd9660_unlock(void *v) 707 { 708 struct vop_unlock_args *ap = v; 709 struct vnode *vp = ap->a_vp; 710 711 rrw_exit(&VTOI(vp)->i_lock); 712 return 0; 713 } 714 715 /* 716 * Calculate the logical to physical mapping if not done already, 717 * then call the device strategy routine. 718 */ 719 int 720 cd9660_strategy(void *v) 721 { 722 struct vop_strategy_args *ap = v; 723 struct buf *bp = ap->a_bp; 724 struct vnode *vp = bp->b_vp; 725 struct iso_node *ip; 726 int error; 727 int s; 728 729 ip = VTOI(vp); 730 if (vp->v_type == VBLK || vp->v_type == VCHR) 731 panic("cd9660_strategy: spec"); 732 if (bp->b_blkno == bp->b_lblkno) { 733 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 734 if (error) { 735 bp->b_error = error; 736 bp->b_flags |= B_ERROR; 737 s = splbio(); 738 biodone(bp); 739 splx(s); 740 return (error); 741 } 742 if ((long)bp->b_blkno == -1) 743 clrbuf(bp); 744 } 745 if ((long)bp->b_blkno == -1) { 746 s = splbio(); 747 biodone(bp); 748 splx(s); 749 return (0); 750 } 751 vp = ip->i_devvp; 752 bp->b_dev = vp->v_rdev; 753 (vp->v_op->vop_strategy)(ap); 754 return (0); 755 } 756 757 /* 758 * Print out the contents of an inode. 759 */ 760 /*ARGSUSED*/ 761 int 762 cd9660_print(void *v) 763 { 764 printf("tag VT_ISOFS, isofs vnode\n"); 765 return (0); 766 } 767 768 /* 769 * Check for a locked inode. 770 */ 771 int 772 cd9660_islocked(void *v) 773 { 774 struct vop_islocked_args *ap = v; 775 776 return rrw_status(&VTOI(ap->a_vp)->i_lock); 777 } 778 779 /* 780 * Return POSIX pathconf information applicable to cd9660 filesystems. 781 */ 782 int 783 cd9660_pathconf(void *v) 784 { 785 struct vop_pathconf_args *ap = v; 786 int error = 0; 787 788 switch (ap->a_name) { 789 case _PC_LINK_MAX: 790 *ap->a_retval = 1; 791 break; 792 case _PC_NAME_MAX: 793 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 794 *ap->a_retval = NAME_MAX; 795 else 796 *ap->a_retval = 37; 797 break; 798 case _PC_CHOWN_RESTRICTED: 799 *ap->a_retval = 1; 800 break; 801 case _PC_NO_TRUNC: 802 *ap->a_retval = 1; 803 break; 804 case _PC_TIMESTAMP_RESOLUTION: 805 *ap->a_retval = 1000000000; /* one billion nanoseconds */ 806 break; 807 default: 808 error = EINVAL; 809 break; 810 } 811 812 return (error); 813 } 814 815 /* 816 * Global vfs data structures for isofs 817 */ 818 #define cd9660_create eopnotsupp 819 #define cd9660_mknod eopnotsupp 820 #define cd9660_write eopnotsupp 821 #define cd9660_fsync nullop 822 #define cd9660_remove eopnotsupp 823 #define cd9660_rename eopnotsupp 824 #define cd9660_mkdir eopnotsupp 825 #define cd9660_rmdir eopnotsupp 826 #define cd9660_advlock eopnotsupp 827 #define cd9660_valloc eopnotsupp 828 #define cd9660_vfree eopnotsupp 829 #define cd9660_truncate eopnotsupp 830 #define cd9660_update eopnotsupp 831 #define cd9660_bwrite eopnotsupp 832 #define cd9660_revoke vop_generic_revoke 833 834 /* Global vfs data structures for cd9660. */ 835 const struct vops cd9660_vops = { 836 .vop_lookup = cd9660_lookup, 837 .vop_create = cd9660_create, 838 .vop_mknod = cd9660_mknod, 839 .vop_open = cd9660_open, 840 .vop_close = cd9660_close, 841 .vop_access = cd9660_access, 842 .vop_getattr = cd9660_getattr, 843 .vop_setattr = cd9660_setattr, 844 .vop_read = cd9660_read, 845 .vop_write = cd9660_write, 846 .vop_ioctl = cd9660_ioctl, 847 .vop_poll = cd9660_poll, 848 .vop_kqfilter = cd9660_kqfilter, 849 .vop_revoke = cd9660_revoke, 850 .vop_fsync = cd9660_fsync, 851 .vop_remove = cd9660_remove, 852 .vop_link = cd9660_link, 853 .vop_rename = cd9660_rename, 854 .vop_mkdir = cd9660_mkdir, 855 .vop_rmdir = cd9660_rmdir, 856 .vop_symlink = cd9660_symlink, 857 .vop_readdir = cd9660_readdir, 858 .vop_readlink = cd9660_readlink, 859 .vop_abortop = vop_generic_abortop, 860 .vop_inactive = cd9660_inactive, 861 .vop_reclaim = cd9660_reclaim, 862 .vop_lock = cd9660_lock, 863 .vop_unlock = cd9660_unlock, 864 .vop_bmap = cd9660_bmap, 865 .vop_strategy = cd9660_strategy, 866 .vop_print = cd9660_print, 867 .vop_islocked = cd9660_islocked, 868 .vop_pathconf = cd9660_pathconf, 869 .vop_advlock = cd9660_advlock, 870 .vop_bwrite = vop_generic_bwrite 871 }; 872 873 /* Special device vnode ops */ 874 const struct vops cd9660_specvops = { 875 .vop_access = cd9660_access, 876 .vop_getattr = cd9660_getattr, 877 .vop_setattr = cd9660_setattr, 878 .vop_inactive = cd9660_inactive, 879 .vop_reclaim = cd9660_reclaim, 880 .vop_lock = cd9660_lock, 881 .vop_unlock = cd9660_unlock, 882 .vop_print = cd9660_print, 883 .vop_islocked = cd9660_islocked, 884 885 /* XXX: Keep in sync with spec_vops. */ 886 .vop_lookup = vop_generic_lookup, 887 .vop_create = spec_badop, 888 .vop_mknod = spec_badop, 889 .vop_open = spec_open, 890 .vop_close = spec_close, 891 .vop_read = spec_read, 892 .vop_write = spec_write, 893 .vop_ioctl = spec_ioctl, 894 .vop_poll = spec_poll, 895 .vop_kqfilter = spec_kqfilter, 896 .vop_revoke = vop_generic_revoke, 897 .vop_fsync = spec_fsync, 898 .vop_remove = spec_badop, 899 .vop_link = spec_badop, 900 .vop_rename = spec_badop, 901 .vop_mkdir = spec_badop, 902 .vop_rmdir = spec_badop, 903 .vop_symlink = spec_badop, 904 .vop_readdir = spec_badop, 905 .vop_readlink = spec_badop, 906 .vop_abortop = spec_badop, 907 .vop_bmap = vop_generic_bmap, 908 .vop_strategy = spec_strategy, 909 .vop_pathconf = spec_pathconf, 910 .vop_advlock = spec_advlock, 911 .vop_bwrite = vop_generic_bwrite, 912 }; 913 914 #ifdef FIFO 915 const struct vops cd9660_fifovops = { 916 .vop_access = cd9660_access, 917 .vop_getattr = cd9660_getattr, 918 .vop_setattr = cd9660_setattr, 919 .vop_inactive = cd9660_inactive, 920 .vop_reclaim = cd9660_reclaim, 921 .vop_lock = cd9660_lock, 922 .vop_unlock = cd9660_unlock, 923 .vop_print = cd9660_print, 924 .vop_islocked = cd9660_islocked, 925 .vop_bwrite = vop_generic_bwrite, 926 927 /* XXX: Keep in sync with fifo_vops. */ 928 .vop_lookup = vop_generic_lookup, 929 .vop_create = fifo_badop, 930 .vop_mknod = fifo_badop, 931 .vop_open = fifo_open, 932 .vop_close = fifo_close, 933 .vop_read = fifo_read, 934 .vop_write = fifo_write, 935 .vop_ioctl = fifo_ioctl, 936 .vop_poll = fifo_poll, 937 .vop_kqfilter = fifo_kqfilter, 938 .vop_revoke = vop_generic_revoke, 939 .vop_fsync = nullop, 940 .vop_remove = fifo_badop, 941 .vop_link = fifo_badop, 942 .vop_rename = fifo_badop, 943 .vop_mkdir = fifo_badop, 944 .vop_rmdir = fifo_badop, 945 .vop_symlink = fifo_badop, 946 .vop_readdir = fifo_badop, 947 .vop_readlink = fifo_badop, 948 .vop_abortop = fifo_badop, 949 .vop_bmap = vop_generic_bmap, 950 .vop_strategy = fifo_badop, 951 .vop_pathconf = fifo_pathconf, 952 .vop_advlock = fifo_advlock, 953 }; 954 #endif /* FIFO */ 955 956 void filt_cd9660detach(struct knote *kn); 957 int filt_cd9660read(struct knote *kn, long hint); 958 int filt_cd9660write(struct knote *kn, long hint); 959 int filt_cd9660vnode(struct knote *kn, long hint); 960 961 const struct filterops cd9660read_filtops = { 962 .f_flags = FILTEROP_ISFD, 963 .f_attach = NULL, 964 .f_detach = filt_cd9660detach, 965 .f_event = filt_cd9660read, 966 }; 967 968 const struct filterops cd9660write_filtops = { 969 .f_flags = FILTEROP_ISFD, 970 .f_attach = NULL, 971 .f_detach = filt_cd9660detach, 972 .f_event = filt_cd9660write, 973 }; 974 975 const struct filterops cd9660vnode_filtops = { 976 .f_flags = FILTEROP_ISFD, 977 .f_attach = NULL, 978 .f_detach = filt_cd9660detach, 979 .f_event = filt_cd9660vnode, 980 }; 981 982 int 983 cd9660_kqfilter(void *v) 984 { 985 struct vop_kqfilter_args *ap = v; 986 struct vnode *vp = ap->a_vp; 987 struct knote *kn = ap->a_kn; 988 989 switch (kn->kn_filter) { 990 case EVFILT_READ: 991 kn->kn_fop = &cd9660read_filtops; 992 break; 993 case EVFILT_WRITE: 994 kn->kn_fop = &cd9660write_filtops; 995 break; 996 case EVFILT_VNODE: 997 kn->kn_fop = &cd9660vnode_filtops; 998 break; 999 default: 1000 return (EINVAL); 1001 } 1002 1003 kn->kn_hook = (caddr_t)vp; 1004 1005 klist_insert(&vp->v_selectinfo.si_note, kn); 1006 1007 return (0); 1008 } 1009 1010 void 1011 filt_cd9660detach(struct knote *kn) 1012 { 1013 struct vnode *vp = (struct vnode *)kn->kn_hook; 1014 1015 klist_remove(&vp->v_selectinfo.si_note, kn); 1016 } 1017 1018 int 1019 filt_cd9660read(struct knote *kn, long hint) 1020 { 1021 struct vnode *vp = (struct vnode *)kn->kn_hook; 1022 struct iso_node *node = VTOI(vp); 1023 1024 /* 1025 * filesystem is gone, so set the EOF flag and schedule 1026 * the knote for deletion. 1027 */ 1028 if (hint == NOTE_REVOKE) { 1029 kn->kn_flags |= (EV_EOF | EV_ONESHOT); 1030 return (1); 1031 } 1032 1033 kn->kn_data = node->i_size - foffset(kn->kn_fp); 1034 if (kn->kn_data == 0 && kn->kn_sfflags & NOTE_EOF) { 1035 kn->kn_fflags |= NOTE_EOF; 1036 return (1); 1037 } 1038 1039 if (kn->kn_flags & __EV_POLL) 1040 return (1); 1041 1042 return (kn->kn_data != 0); 1043 } 1044 1045 int 1046 filt_cd9660write(struct knote *kn, long hint) 1047 { 1048 /* 1049 * filesystem is gone, so set the EOF flag and schedule 1050 * the knote for deletion. 1051 */ 1052 if (hint == NOTE_REVOKE) { 1053 kn->kn_flags |= (EV_EOF | EV_ONESHOT); 1054 return (1); 1055 } 1056 1057 kn->kn_data = 0; 1058 return (1); 1059 } 1060 1061 int 1062 filt_cd9660vnode(struct knote *kn, long hint) 1063 { 1064 if (kn->kn_sfflags & hint) 1065 kn->kn_fflags |= hint; 1066 if (hint == NOTE_REVOKE) { 1067 kn->kn_flags |= EV_EOF; 1068 return (1); 1069 } 1070 return (kn->kn_fflags != 0); 1071 } 1072