1 /* $OpenBSD: cd9660_vnops.c,v 1.97 2024/10/18 05:52:32 miod 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/specdev.h> 58 #include <sys/unistd.h> 59 60 #include <miscfs/fifofs/fifo.h> 61 62 #include <isofs/cd9660/iso.h> 63 #include <isofs/cd9660/cd9660_extern.h> 64 #include <isofs/cd9660/cd9660_node.h> 65 #include <isofs/cd9660/iso_rrip.h> 66 67 int cd9660_kqfilter(void *v); 68 69 70 /* 71 * Structure for reading directories 72 */ 73 struct isoreaddir { 74 struct dirent saveent; 75 struct dirent assocent; 76 struct dirent current; 77 off_t saveoff; 78 off_t assocoff; 79 off_t curroff; 80 struct uio *uio; 81 off_t uio_off; 82 int eofflag; 83 }; 84 85 int iso_uiodir(struct isoreaddir *, struct dirent *, off_t); 86 int iso_shipdir(struct isoreaddir *); 87 88 /* 89 * Setattr call. Only allowed for block and character special devices. 90 */ 91 int 92 cd9660_setattr(void *v) 93 { 94 struct vop_setattr_args *ap = v; 95 struct vnode *vp = ap->a_vp; 96 struct vattr *vap = ap->a_vap; 97 98 if (vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 99 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_nsec != VNOVAL || 100 vap->va_mtime.tv_nsec != VNOVAL || vap->va_mode != (mode_t)VNOVAL || 101 (vap->va_vaflags & VA_UTIMES_CHANGE)) 102 return (EROFS); 103 if (vap->va_size != VNOVAL) { 104 switch (vp->v_type) { 105 case VDIR: 106 return (EISDIR); 107 case VLNK: 108 case VREG: 109 return (EROFS); 110 case VCHR: 111 case VBLK: 112 case VSOCK: 113 case VFIFO: 114 return (0); 115 default: 116 return (EINVAL); 117 } 118 } 119 120 return (EINVAL); 121 } 122 123 /* 124 * Open called. 125 * 126 * Nothing to do. 127 */ 128 int 129 cd9660_open(void *v) 130 { 131 return (0); 132 } 133 134 /* 135 * Close called 136 * 137 * Update the times on the inode on writeable file systems. 138 */ 139 int 140 cd9660_close(void *v) 141 { 142 return (0); 143 } 144 145 /* 146 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 147 * The mode is shifted to select the owner/group/other fields. The 148 * super user is granted all permissions. 149 */ 150 int 151 cd9660_access(void *v) 152 { 153 struct vop_access_args *ap = v; 154 struct iso_node *ip = VTOI(ap->a_vp); 155 156 return (vaccess(ap->a_vp->v_type, ip->inode.iso_mode & ALLPERMS, 157 ip->inode.iso_uid, ip->inode.iso_gid, ap->a_mode, ap->a_cred)); 158 } 159 160 int 161 cd9660_getattr(void *v) 162 { 163 struct vop_getattr_args *ap = v; 164 struct vnode *vp = ap->a_vp; 165 struct vattr *vap = ap->a_vap; 166 struct iso_node *ip = VTOI(vp); 167 168 vap->va_fsid = ip->i_dev; 169 vap->va_fileid = ip->i_number; 170 171 vap->va_mode = ip->inode.iso_mode & ALLPERMS; 172 vap->va_nlink = ip->inode.iso_links; 173 vap->va_uid = ip->inode.iso_uid; 174 vap->va_gid = ip->inode.iso_gid; 175 vap->va_atime = ip->inode.iso_atime; 176 vap->va_mtime = ip->inode.iso_mtime; 177 vap->va_ctime = ip->inode.iso_ctime; 178 vap->va_rdev = ip->inode.iso_rdev; 179 180 vap->va_size = (u_quad_t) ip->i_size; 181 if (ip->i_size == 0 && vp->v_type == VLNK) { 182 struct vop_readlink_args rdlnk; 183 struct iovec aiov; 184 struct uio auio; 185 char *cp; 186 187 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 188 aiov.iov_base = cp; 189 aiov.iov_len = MAXPATHLEN; 190 auio.uio_iov = &aiov; 191 auio.uio_iovcnt = 1; 192 auio.uio_offset = 0; 193 auio.uio_rw = UIO_READ; 194 auio.uio_segflg = UIO_SYSSPACE; 195 auio.uio_procp = ap->a_p; 196 auio.uio_resid = MAXPATHLEN; 197 rdlnk.a_uio = &auio; 198 rdlnk.a_vp = ap->a_vp; 199 rdlnk.a_cred = ap->a_cred; 200 if (cd9660_readlink(&rdlnk) == 0) 201 vap->va_size = MAXPATHLEN - auio.uio_resid; 202 free(cp, M_TEMP, 0); 203 } 204 vap->va_flags = 0; 205 vap->va_gen = 1; 206 vap->va_blocksize = ip->i_mnt->logical_block_size; 207 vap->va_bytes = (u_quad_t) ip->i_size; 208 vap->va_type = vp->v_type; 209 return (0); 210 } 211 212 /* 213 * Vnode op for reading. 214 */ 215 int 216 cd9660_read(void *v) 217 { 218 struct vop_read_args *ap = v; 219 struct vnode *vp = ap->a_vp; 220 struct uio *uio = ap->a_uio; 221 struct iso_node *ip = VTOI(vp); 222 struct iso_mnt *imp; 223 struct buf *bp; 224 daddr_t lbn, rablock; 225 off_t diff; 226 int error = 0; 227 long size, on; 228 size_t n; 229 230 if (uio->uio_resid == 0) 231 return (0); 232 if (uio->uio_offset < 0) 233 return (EINVAL); 234 ip->i_flag |= IN_ACCESS; 235 imp = ip->i_mnt; 236 do { 237 struct cluster_info *ci = &ip->i_ci; 238 239 lbn = lblkno(imp, uio->uio_offset); 240 on = blkoff(imp, uio->uio_offset); 241 n = ulmin(imp->logical_block_size - on, uio->uio_resid); 242 diff = (off_t)ip->i_size - uio->uio_offset; 243 if (diff <= 0) 244 return (0); 245 if (diff < n) 246 n = diff; 247 size = blksize(imp, ip, lbn); 248 rablock = lbn + 1; 249 #define MAX_RA 32 250 if (ci->ci_lastr + 1 == lbn) { 251 struct ra { 252 daddr_t blks[MAX_RA]; 253 int sizes[MAX_RA]; 254 } *ra; 255 int i; 256 257 ra = malloc(sizeof *ra, M_TEMP, M_WAITOK); 258 for (i = 0; i < MAX_RA && 259 lblktosize(imp, (rablock + i)) < ip->i_size; 260 i++) { 261 ra->blks[i] = rablock + i; 262 ra->sizes[i] = blksize(imp, ip, rablock + i); 263 } 264 error = breadn(vp, lbn, size, ra->blks, 265 ra->sizes, i, &bp); 266 free(ra, M_TEMP, 0); 267 } else 268 error = bread(vp, lbn, size, &bp); 269 ci->ci_lastr = lbn; 270 n = ulmin(n, size - bp->b_resid); 271 if (error) { 272 brelse(bp); 273 return (error); 274 } 275 276 error = uiomove(bp->b_data + on, n, uio); 277 278 brelse(bp); 279 } while (error == 0 && uio->uio_resid > 0 && n != 0); 280 return (error); 281 } 282 283 int 284 cd9660_ioctl(void *v) 285 { 286 return (ENOTTY); 287 } 288 289 /* 290 * Mmap a file 291 * 292 * NB Currently unsupported. 293 */ 294 int 295 cd9660_mmap(void *v) 296 { 297 298 return (EINVAL); 299 } 300 301 /* 302 * Seek on a file 303 * 304 * Nothing to do, so just return. 305 */ 306 int 307 cd9660_seek(void *v) 308 { 309 return (0); 310 } 311 312 int 313 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 314 { 315 int error; 316 317 dp->d_name[dp->d_namlen] = 0; 318 dp->d_reclen = DIRENT_SIZE(dp); 319 320 if (memchr(dp->d_name, '/', dp->d_namlen) != NULL) { 321 /* illegal file name */ 322 return (EINVAL); 323 } 324 325 if (idp->uio->uio_resid < dp->d_reclen) { 326 idp->eofflag = 0; 327 return (-1); 328 } 329 330 dp->d_off = off; 331 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 332 return (error); 333 idp->uio_off = off; 334 return (0); 335 } 336 337 int 338 iso_shipdir(struct isoreaddir *idp) 339 { 340 struct dirent *dp; 341 int cl, sl, assoc; 342 int error; 343 char *cname, *sname; 344 345 cl = idp->current.d_namlen; 346 cname = idp->current.d_name; 347 348 if ((assoc = cl > 1 && *cname == ASSOCCHAR)) { 349 cl--; 350 cname++; 351 } 352 353 dp = &idp->saveent; 354 sname = dp->d_name; 355 if (!(sl = dp->d_namlen)) { 356 dp = &idp->assocent; 357 sname = dp->d_name + 1; 358 sl = dp->d_namlen - 1; 359 } 360 if (sl > 0) { 361 if (sl != cl 362 || bcmp(sname,cname,sl)) { 363 if (idp->assocent.d_namlen) { 364 error = iso_uiodir(idp, &idp->assocent, 365 idp->assocoff); 366 if (error) 367 return (error); 368 idp->assocent.d_namlen = 0; 369 } 370 if (idp->saveent.d_namlen) { 371 error = iso_uiodir(idp, &idp->saveent, 372 idp->saveoff); 373 if (error) 374 return (error); 375 idp->saveent.d_namlen = 0; 376 } 377 } 378 } 379 idp->current.d_reclen = DIRENT_SIZE(&idp->current); 380 if (assoc) { 381 idp->assocoff = idp->curroff; 382 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 383 } else { 384 idp->saveoff = idp->curroff; 385 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 386 } 387 return (0); 388 } 389 390 /* 391 * Vnode op for readdir 392 */ 393 int 394 cd9660_readdir(void *v) 395 { 396 struct vop_readdir_args *ap = v; 397 struct uio *uio = ap->a_uio; 398 struct isoreaddir *idp; 399 struct vnode *vdp = ap->a_vp; 400 struct iso_node *dp; 401 struct iso_mnt *imp; 402 struct buf *bp = NULL; 403 struct iso_directory_record *ep; 404 int entryoffsetinblock; 405 doff_t endsearch; 406 u_long bmask; 407 int error = 0; 408 int reclen; 409 u_short namelen; 410 cdino_t ino; 411 412 dp = VTOI(vdp); 413 imp = dp->i_mnt; 414 bmask = imp->im_bmask; 415 416 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 417 418 /* 419 * These are passed to copyout(), so make sure there's no garbage 420 * being leaked in padding or after short names. 421 */ 422 memset(&idp->saveent, 0, sizeof(idp->saveent)); 423 memset(&idp->assocent, 0, sizeof(idp->assocent)); 424 memset(&idp->current, 0, sizeof(idp->current)); 425 426 /* 427 * XXX 428 * Is it worth trying to figure out the type? 429 */ 430 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 431 DT_UNKNOWN; 432 idp->uio = uio; 433 idp->eofflag = 1; 434 idp->curroff = uio->uio_offset; 435 idp->uio_off = uio->uio_offset; 436 437 if ((entryoffsetinblock = idp->curroff & bmask) && 438 (error = cd9660_bufatoff(dp, (off_t)idp->curroff, NULL, &bp))) { 439 free(idp, M_TEMP, 0); 440 return (error); 441 } 442 endsearch = dp->i_size; 443 444 while (idp->curroff < endsearch) { 445 /* 446 * If offset is on a block boundary, 447 * read the next directory block. 448 * Release previous if it exists. 449 */ 450 if ((idp->curroff & bmask) == 0) { 451 if (bp != NULL) 452 brelse(bp); 453 error = cd9660_bufatoff(dp, (off_t)idp->curroff, 454 NULL, &bp); 455 if (error) 456 break; 457 entryoffsetinblock = 0; 458 } 459 /* 460 * Get pointer to next entry. 461 */ 462 ep = (struct iso_directory_record *) 463 ((char *)bp->b_data + entryoffsetinblock); 464 465 reclen = isonum_711(ep->length); 466 if (reclen == 0) { 467 /* skip to next block, if any */ 468 idp->curroff = 469 (idp->curroff & ~bmask) + imp->logical_block_size; 470 continue; 471 } 472 473 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 474 error = EINVAL; 475 /* illegal entry, stop */ 476 break; 477 } 478 479 if (entryoffsetinblock + reclen > imp->logical_block_size) { 480 error = EINVAL; 481 /* illegal directory, so stop looking */ 482 break; 483 } 484 485 idp->current.d_namlen = isonum_711(ep->name_len); 486 487 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 488 error = EINVAL; 489 /* illegal entry, stop */ 490 break; 491 } 492 493 if (isonum_711(ep->flags)&2) 494 ino = isodirino(ep, imp); 495 else 496 ino = dbtob(bp->b_blkno) + entryoffsetinblock; 497 498 idp->curroff += reclen; 499 500 switch (imp->iso_ftype) { 501 case ISO_FTYPE_RRIP: 502 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 503 &ino, imp); 504 idp->current.d_fileno = ino; 505 idp->current.d_namlen = (u_char)namelen; 506 if (idp->current.d_namlen) 507 error = iso_uiodir(idp,&idp->current,idp->curroff); 508 break; 509 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */ 510 idp->current.d_fileno = ino; 511 strlcpy(idp->current.d_name,"..", 512 sizeof idp->current.d_name); 513 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 514 idp->current.d_namlen = 1; 515 error = iso_uiodir(idp,&idp->current,idp->curroff); 516 } else if (idp->current.d_namlen == 1 && 517 ep->name[0] == 1) { 518 idp->current.d_namlen = 2; 519 error = iso_uiodir(idp,&idp->current,idp->curroff); 520 } else { 521 isofntrans(ep->name,idp->current.d_namlen, 522 idp->current.d_name, &namelen, 523 imp->iso_ftype == ISO_FTYPE_9660, 524 isonum_711(ep->flags) & 4, 525 imp->joliet_level); 526 idp->current.d_namlen = (u_char)namelen; 527 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 528 error = iso_shipdir(idp); 529 else 530 error = iso_uiodir(idp,&idp->current,idp->curroff); 531 } 532 } 533 if (error) 534 break; 535 536 entryoffsetinblock += reclen; 537 } 538 539 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 540 idp->current.d_namlen = 0; 541 error = iso_shipdir(idp); 542 } 543 if (error < 0) 544 error = 0; 545 546 if (bp) 547 brelse (bp); 548 549 uio->uio_offset = idp->uio_off; 550 *ap->a_eofflag = idp->eofflag; 551 552 free(idp, M_TEMP, 0); 553 554 return (error); 555 } 556 557 /* 558 * Return target name of a symbolic link 559 * Shouldn't we get the parent vnode and read the data from there? 560 * This could eventually result in deadlocks in cd9660_lookup. 561 * But otherwise the block read here is in the block buffer two times. 562 */ 563 typedef struct iso_directory_record ISODIR; 564 typedef struct iso_node ISONODE; 565 typedef struct iso_mnt ISOMNT; 566 int 567 cd9660_readlink(void *v) 568 { 569 struct vop_readlink_args *ap = v; 570 ISONODE *ip; 571 ISODIR *dirp; 572 ISOMNT *imp; 573 struct buf *bp; 574 struct uio *uio; 575 u_short symlen; 576 int error; 577 char *symname; 578 579 ip = VTOI(ap->a_vp); 580 imp = ip->i_mnt; 581 uio = ap->a_uio; 582 583 if (imp->iso_ftype != ISO_FTYPE_RRIP) 584 return (EINVAL); 585 586 /* 587 * Get parents directory record block that this inode included. 588 */ 589 error = bread(imp->im_devvp, 590 (ip->i_number >> imp->im_bshift) << 591 (imp->im_bshift - DEV_BSHIFT), 592 imp->logical_block_size, &bp); 593 if (error) { 594 brelse(bp); 595 return (EINVAL); 596 } 597 598 /* 599 * Setup the directory pointer for this inode 600 */ 601 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 602 603 /* 604 * Just make sure, we have a right one.... 605 * 1: Check not cross boundary on block 606 */ 607 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 608 > imp->logical_block_size) { 609 brelse(bp); 610 return (EINVAL); 611 } 612 613 /* 614 * Now get a buffer 615 * Abuse a namei buffer for now. 616 */ 617 if (uio->uio_segflg == UIO_SYSSPACE && 618 uio->uio_iov->iov_len >= MAXPATHLEN) 619 symname = uio->uio_iov->iov_base; 620 else 621 symname = pool_get(&namei_pool, PR_WAITOK); 622 623 /* 624 * Ok, we just gathering a symbolic name in SL record. 625 */ 626 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 627 if (uio->uio_segflg != UIO_SYSSPACE || 628 uio->uio_iov->iov_len < MAXPATHLEN) 629 pool_put(&namei_pool, symname); 630 brelse(bp); 631 return (EINVAL); 632 } 633 /* 634 * Don't forget before you leave from home ;-) 635 */ 636 brelse(bp); 637 638 /* 639 * return with the symbolic name to caller's. 640 */ 641 if (uio->uio_segflg != UIO_SYSSPACE || 642 uio->uio_iov->iov_len < MAXPATHLEN) { 643 error = uiomove(symname, symlen, uio); 644 pool_put(&namei_pool, symname); 645 return (error); 646 } 647 uio->uio_resid -= symlen; 648 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 649 uio->uio_iov->iov_len -= symlen; 650 return (0); 651 } 652 653 int 654 cd9660_link(void *v) 655 { 656 struct vop_link_args *ap = v; 657 658 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 659 vput(ap->a_dvp); 660 return (EROFS); 661 } 662 663 int 664 cd9660_symlink(void *v) 665 { 666 struct vop_symlink_args *ap = v; 667 668 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 669 vput(ap->a_dvp); 670 return (EROFS); 671 } 672 673 /* 674 * Lock an inode. 675 */ 676 int 677 cd9660_lock(void *v) 678 { 679 struct vop_lock_args *ap = v; 680 struct vnode *vp = ap->a_vp; 681 682 return rrw_enter(&VTOI(vp)->i_lock, ap->a_flags & LK_RWFLAGS); 683 } 684 685 /* 686 * Unlock an inode. 687 */ 688 int 689 cd9660_unlock(void *v) 690 { 691 struct vop_unlock_args *ap = v; 692 struct vnode *vp = ap->a_vp; 693 694 rrw_exit(&VTOI(vp)->i_lock); 695 return 0; 696 } 697 698 /* 699 * Calculate the logical to physical mapping if not done already, 700 * then call the device strategy routine. 701 */ 702 int 703 cd9660_strategy(void *v) 704 { 705 struct vop_strategy_args *ap = v; 706 struct buf *bp = ap->a_bp; 707 struct vnode *vp = bp->b_vp; 708 struct iso_node *ip; 709 int error; 710 int s; 711 712 ip = VTOI(vp); 713 if (vp->v_type == VBLK || vp->v_type == VCHR) 714 panic("cd9660_strategy: spec"); 715 if (bp->b_blkno == bp->b_lblkno) { 716 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 717 if (error) { 718 bp->b_error = error; 719 bp->b_flags |= B_ERROR; 720 s = splbio(); 721 biodone(bp); 722 splx(s); 723 return (error); 724 } 725 if ((long)bp->b_blkno == -1) 726 clrbuf(bp); 727 } 728 if ((long)bp->b_blkno == -1) { 729 s = splbio(); 730 biodone(bp); 731 splx(s); 732 return (0); 733 } 734 vp = ip->i_devvp; 735 bp->b_dev = vp->v_rdev; 736 VOP_STRATEGY(vp, bp); 737 return (0); 738 } 739 740 /* 741 * Print out the contents of an inode. 742 */ 743 int 744 cd9660_print(void *v) 745 { 746 #if defined(DEBUG) || defined(DIAGNOSTIC) || defined(VFSLCKDEBUG) 747 printf("tag VT_ISOFS, isofs vnode\n"); 748 #endif 749 return (0); 750 } 751 752 /* 753 * Check for a locked inode. 754 */ 755 int 756 cd9660_islocked(void *v) 757 { 758 struct vop_islocked_args *ap = v; 759 760 return rrw_status(&VTOI(ap->a_vp)->i_lock); 761 } 762 763 /* 764 * Return POSIX pathconf information applicable to cd9660 filesystems. 765 */ 766 int 767 cd9660_pathconf(void *v) 768 { 769 struct vop_pathconf_args *ap = v; 770 int error = 0; 771 772 switch (ap->a_name) { 773 case _PC_LINK_MAX: 774 *ap->a_retval = 1; 775 break; 776 case _PC_NAME_MAX: 777 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 778 *ap->a_retval = NAME_MAX; 779 else 780 *ap->a_retval = 37; 781 break; 782 case _PC_CHOWN_RESTRICTED: 783 *ap->a_retval = 1; 784 break; 785 case _PC_NO_TRUNC: 786 *ap->a_retval = 1; 787 break; 788 case _PC_TIMESTAMP_RESOLUTION: 789 *ap->a_retval = 1000000000; /* one billion nanoseconds */ 790 break; 791 default: 792 error = EINVAL; 793 break; 794 } 795 796 return (error); 797 } 798 799 /* 800 * Global vfs data structures for isofs 801 */ 802 803 /* Global vfs data structures for cd9660. */ 804 const struct vops cd9660_vops = { 805 .vop_lookup = cd9660_lookup, 806 .vop_create = eopnotsupp, 807 .vop_mknod = eopnotsupp, 808 .vop_open = cd9660_open, 809 .vop_close = cd9660_close, 810 .vop_access = cd9660_access, 811 .vop_getattr = cd9660_getattr, 812 .vop_setattr = cd9660_setattr, 813 .vop_read = cd9660_read, 814 .vop_write = eopnotsupp, 815 .vop_ioctl = cd9660_ioctl, 816 .vop_kqfilter = cd9660_kqfilter, 817 .vop_revoke = vop_generic_revoke, 818 .vop_fsync = nullop, 819 .vop_remove = eopnotsupp, 820 .vop_link = cd9660_link, 821 .vop_rename = eopnotsupp, 822 .vop_mkdir = eopnotsupp, 823 .vop_rmdir = eopnotsupp, 824 .vop_symlink = cd9660_symlink, 825 .vop_readdir = cd9660_readdir, 826 .vop_readlink = cd9660_readlink, 827 .vop_abortop = vop_generic_abortop, 828 .vop_inactive = cd9660_inactive, 829 .vop_reclaim = cd9660_reclaim, 830 .vop_lock = cd9660_lock, 831 .vop_unlock = cd9660_unlock, 832 .vop_bmap = cd9660_bmap, 833 .vop_strategy = cd9660_strategy, 834 .vop_print = cd9660_print, 835 .vop_islocked = cd9660_islocked, 836 .vop_pathconf = cd9660_pathconf, 837 .vop_advlock = eopnotsupp, 838 .vop_bwrite = vop_generic_bwrite, 839 }; 840 841 /* Special device vnode ops */ 842 const struct vops cd9660_specvops = { 843 .vop_access = cd9660_access, 844 .vop_getattr = cd9660_getattr, 845 .vop_setattr = cd9660_setattr, 846 .vop_inactive = cd9660_inactive, 847 .vop_reclaim = cd9660_reclaim, 848 .vop_lock = cd9660_lock, 849 .vop_unlock = cd9660_unlock, 850 .vop_print = cd9660_print, 851 .vop_islocked = cd9660_islocked, 852 853 /* XXX: Keep in sync with spec_vops. */ 854 .vop_lookup = vop_generic_lookup, 855 .vop_create = vop_generic_badop, 856 .vop_mknod = vop_generic_badop, 857 .vop_open = spec_open, 858 .vop_close = spec_close, 859 .vop_read = spec_read, 860 .vop_write = spec_write, 861 .vop_ioctl = spec_ioctl, 862 .vop_kqfilter = spec_kqfilter, 863 .vop_revoke = vop_generic_revoke, 864 .vop_fsync = spec_fsync, 865 .vop_remove = vop_generic_badop, 866 .vop_link = vop_generic_badop, 867 .vop_rename = vop_generic_badop, 868 .vop_mkdir = vop_generic_badop, 869 .vop_rmdir = vop_generic_badop, 870 .vop_symlink = vop_generic_badop, 871 .vop_readdir = vop_generic_badop, 872 .vop_readlink = vop_generic_badop, 873 .vop_abortop = vop_generic_badop, 874 .vop_bmap = vop_generic_bmap, 875 .vop_strategy = spec_strategy, 876 .vop_pathconf = spec_pathconf, 877 .vop_advlock = spec_advlock, 878 .vop_bwrite = vop_generic_bwrite, 879 }; 880 881 #ifdef FIFO 882 const struct vops cd9660_fifovops = { 883 .vop_access = cd9660_access, 884 .vop_getattr = cd9660_getattr, 885 .vop_setattr = cd9660_setattr, 886 .vop_inactive = cd9660_inactive, 887 .vop_reclaim = cd9660_reclaim, 888 .vop_lock = cd9660_lock, 889 .vop_unlock = cd9660_unlock, 890 .vop_print = cd9660_print, 891 .vop_islocked = cd9660_islocked, 892 .vop_bwrite = vop_generic_bwrite, 893 894 /* XXX: Keep in sync with fifo_vops. */ 895 .vop_lookup = vop_generic_lookup, 896 .vop_create = vop_generic_badop, 897 .vop_mknod = vop_generic_badop, 898 .vop_open = fifo_open, 899 .vop_close = fifo_close, 900 .vop_read = fifo_read, 901 .vop_write = fifo_write, 902 .vop_ioctl = fifo_ioctl, 903 .vop_kqfilter = fifo_kqfilter, 904 .vop_revoke = vop_generic_revoke, 905 .vop_fsync = nullop, 906 .vop_remove = vop_generic_badop, 907 .vop_link = vop_generic_badop, 908 .vop_rename = vop_generic_badop, 909 .vop_mkdir = vop_generic_badop, 910 .vop_rmdir = vop_generic_badop, 911 .vop_symlink = vop_generic_badop, 912 .vop_readdir = vop_generic_badop, 913 .vop_readlink = vop_generic_badop, 914 .vop_abortop = vop_generic_badop, 915 .vop_bmap = vop_generic_bmap, 916 .vop_strategy = vop_generic_badop, 917 .vop_pathconf = fifo_pathconf, 918 .vop_advlock = fifo_advlock, 919 }; 920 #endif /* FIFO */ 921 922 void filt_cd9660detach(struct knote *kn); 923 int filt_cd9660read(struct knote *kn, long hint); 924 int filt_cd9660write(struct knote *kn, long hint); 925 int filt_cd9660vnode(struct knote *kn, long hint); 926 927 const struct filterops cd9660read_filtops = { 928 .f_flags = FILTEROP_ISFD, 929 .f_attach = NULL, 930 .f_detach = filt_cd9660detach, 931 .f_event = filt_cd9660read, 932 }; 933 934 const struct filterops cd9660write_filtops = { 935 .f_flags = FILTEROP_ISFD, 936 .f_attach = NULL, 937 .f_detach = filt_cd9660detach, 938 .f_event = filt_cd9660write, 939 }; 940 941 const struct filterops cd9660vnode_filtops = { 942 .f_flags = FILTEROP_ISFD, 943 .f_attach = NULL, 944 .f_detach = filt_cd9660detach, 945 .f_event = filt_cd9660vnode, 946 }; 947 948 int 949 cd9660_kqfilter(void *v) 950 { 951 struct vop_kqfilter_args *ap = v; 952 struct vnode *vp = ap->a_vp; 953 struct knote *kn = ap->a_kn; 954 955 switch (kn->kn_filter) { 956 case EVFILT_READ: 957 kn->kn_fop = &cd9660read_filtops; 958 break; 959 case EVFILT_WRITE: 960 kn->kn_fop = &cd9660write_filtops; 961 break; 962 case EVFILT_VNODE: 963 kn->kn_fop = &cd9660vnode_filtops; 964 break; 965 default: 966 return (EINVAL); 967 } 968 969 kn->kn_hook = (caddr_t)vp; 970 971 klist_insert_locked(&vp->v_klist, kn); 972 973 return (0); 974 } 975 976 void 977 filt_cd9660detach(struct knote *kn) 978 { 979 struct vnode *vp = (struct vnode *)kn->kn_hook; 980 981 klist_remove_locked(&vp->v_klist, kn); 982 } 983 984 int 985 filt_cd9660read(struct knote *kn, long hint) 986 { 987 struct vnode *vp = (struct vnode *)kn->kn_hook; 988 struct iso_node *node = VTOI(vp); 989 990 /* 991 * filesystem is gone, so set the EOF flag and schedule 992 * the knote for deletion. 993 */ 994 if (hint == NOTE_REVOKE) { 995 kn->kn_flags |= (EV_EOF | EV_ONESHOT); 996 return (1); 997 } 998 999 kn->kn_data = node->i_size - foffset(kn->kn_fp); 1000 if (kn->kn_data == 0 && kn->kn_sfflags & NOTE_EOF) { 1001 kn->kn_fflags |= NOTE_EOF; 1002 return (1); 1003 } 1004 1005 if (kn->kn_flags & (__EV_POLL | __EV_SELECT)) 1006 return (1); 1007 1008 return (kn->kn_data != 0); 1009 } 1010 1011 int 1012 filt_cd9660write(struct knote *kn, long hint) 1013 { 1014 /* 1015 * filesystem is gone, so set the EOF flag and schedule 1016 * the knote for deletion. 1017 */ 1018 if (hint == NOTE_REVOKE) { 1019 kn->kn_flags |= (EV_EOF | EV_ONESHOT); 1020 return (1); 1021 } 1022 1023 kn->kn_data = 0; 1024 return (1); 1025 } 1026 1027 int 1028 filt_cd9660vnode(struct knote *kn, long hint) 1029 { 1030 if (kn->kn_sfflags & hint) 1031 kn->kn_fflags |= hint; 1032 if (hint == NOTE_REVOKE) { 1033 kn->kn_flags |= EV_EOF; 1034 return (1); 1035 } 1036 return (kn->kn_fflags != 0); 1037 } 1038