1 /* $OpenBSD: cd9660_vnops.c,v 1.53 2011/04/05 14:14:07 thib 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/proc.h> 49 #include <sys/conf.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.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/cdio.h> 58 #include <sys/poll.h> 59 60 #include <miscfs/fifofs/fifo.h> 61 #include <miscfs/specfs/specdev.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 /* 69 * Structure for reading directories 70 */ 71 struct isoreaddir { 72 struct dirent saveent; 73 struct dirent assocent; 74 struct dirent current; 75 off_t saveoff; 76 off_t assocoff; 77 off_t curroff; 78 struct uio *uio; 79 off_t uio_off; 80 int eofflag; 81 u_long *cookies; 82 int ncookies; 83 }; 84 85 int iso_uiodir(struct isoreaddir *, struct dirent *, off_t); 86 int iso_shipdir(struct isoreaddir *); 87 88 #if 0 89 /* 90 * Mknod vnode call 91 * Actually remap the device number 92 */ 93 int 94 cd9660_mknod(ndp, vap, cred, p) 95 struct nameidata *ndp; 96 struct ucred *cred; 97 struct vattr *vap; 98 struct proc *p; 99 { 100 #ifndef ISODEVMAP 101 pool_put(&namei_pool, ndp->ni_pnbuf); 102 vput(ndp->ni_dvp); 103 vput(ndp->ni_vp); 104 return (EINVAL); 105 #else 106 register struct vnode *vp; 107 struct iso_node *ip; 108 struct iso_dnode *dp; 109 int error; 110 111 vp = ndp->ni_vp; 112 ip = VTOI(vp); 113 114 if (ip->i_mnt->iso_ftype != ISO_FTYPE_RRIP 115 || vap->va_type != vp->v_type 116 || (vap->va_type != VCHR && vap->va_type != VBLK)) { 117 pool_put(&namei_pool, ndp->ni_pnbuf); 118 vput(ndp->ni_dvp); 119 vput(ndp->ni_vp); 120 return (EINVAL); 121 } 122 123 dp = iso_dmap(ip->i_dev,ip->i_number,1); 124 if (ip->inode.iso_rdev == vap->va_rdev || vap->va_rdev == VNOVAL) { 125 /* same as the unmapped one, delete the mapping */ 126 remque(dp); 127 free(dp, M_CACHE); 128 } else 129 /* enter new mapping */ 130 dp->d_dev = vap->va_rdev; 131 132 /* 133 * Remove inode so that it will be reloaded by iget and 134 * checked to see if it is an alias of an existing entry 135 * in the inode cache. 136 */ 137 vput(vp); 138 vp->v_type = VNON; 139 vgone(vp); 140 return (0); 141 #endif 142 } 143 #endif 144 145 /* 146 * Setattr call. Only allowed for block and character special devices. 147 */ 148 int 149 cd9660_setattr(v) 150 void *v; 151 { 152 struct vop_setattr_args *ap = v; 153 struct vnode *vp = ap->a_vp; 154 struct vattr *vap = ap->a_vap; 155 156 if (vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || 157 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 158 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 159 return (EROFS); 160 if (vap->va_size != VNOVAL) { 161 switch (vp->v_type) { 162 case VDIR: 163 return (EISDIR); 164 case VLNK: 165 case VREG: 166 return (EROFS); 167 case VCHR: 168 case VBLK: 169 case VSOCK: 170 case VFIFO: 171 return (0); 172 default: 173 return (EINVAL); 174 } 175 } 176 177 return (EINVAL); 178 } 179 180 /* 181 * Open called. 182 * 183 * Nothing to do. 184 */ 185 /* ARGSUSED */ 186 int 187 cd9660_open(v) 188 void *v; 189 { 190 return (0); 191 } 192 193 /* 194 * Close called 195 * 196 * Update the times on the inode on writeable file systems. 197 */ 198 /* ARGSUSED */ 199 int 200 cd9660_close(v) 201 void *v; 202 { 203 return (0); 204 } 205 206 /* 207 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 208 * The mode is shifted to select the owner/group/other fields. The 209 * super user is granted all permissions. 210 */ 211 int 212 cd9660_access(v) 213 void *v; 214 { 215 struct vop_access_args *ap = v; 216 struct iso_node *ip = VTOI(ap->a_vp); 217 218 return (vaccess(ap->a_vp->v_type, ip->inode.iso_mode & ALLPERMS, 219 ip->inode.iso_uid, ip->inode.iso_gid, ap->a_mode, ap->a_cred)); 220 } 221 222 int 223 cd9660_getattr(v) 224 void *v; 225 { 226 struct vop_getattr_args *ap = v; 227 struct vnode *vp = ap->a_vp; 228 register struct vattr *vap = ap->a_vap; 229 register struct iso_node *ip = VTOI(vp); 230 231 vap->va_fsid = ip->i_dev; 232 vap->va_fileid = ip->i_number; 233 234 vap->va_mode = ip->inode.iso_mode & ALLPERMS; 235 vap->va_nlink = ip->inode.iso_links; 236 vap->va_uid = ip->inode.iso_uid; 237 vap->va_gid = ip->inode.iso_gid; 238 vap->va_atime = ip->inode.iso_atime; 239 vap->va_mtime = ip->inode.iso_mtime; 240 vap->va_ctime = ip->inode.iso_ctime; 241 vap->va_rdev = ip->inode.iso_rdev; 242 243 vap->va_size = (u_quad_t) ip->i_size; 244 if (ip->i_size == 0 && vp->v_type == VLNK) { 245 struct vop_readlink_args rdlnk; 246 struct iovec aiov; 247 struct uio auio; 248 char *cp; 249 250 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 251 aiov.iov_base = cp; 252 aiov.iov_len = MAXPATHLEN; 253 auio.uio_iov = &aiov; 254 auio.uio_iovcnt = 1; 255 auio.uio_offset = 0; 256 auio.uio_rw = UIO_READ; 257 auio.uio_segflg = UIO_SYSSPACE; 258 auio.uio_procp = ap->a_p; 259 auio.uio_resid = MAXPATHLEN; 260 rdlnk.a_uio = &auio; 261 rdlnk.a_vp = ap->a_vp; 262 rdlnk.a_cred = ap->a_cred; 263 if (cd9660_readlink(&rdlnk) == 0) 264 vap->va_size = MAXPATHLEN - auio.uio_resid; 265 free(cp, M_TEMP); 266 } 267 vap->va_flags = 0; 268 vap->va_gen = 1; 269 vap->va_blocksize = ip->i_mnt->logical_block_size; 270 vap->va_bytes = (u_quad_t) ip->i_size; 271 vap->va_type = vp->v_type; 272 return (0); 273 } 274 275 /* 276 * Vnode op for reading. 277 */ 278 int 279 cd9660_read(v) 280 void *v; 281 { 282 struct vop_read_args *ap = v; 283 struct vnode *vp = ap->a_vp; 284 register struct uio *uio = ap->a_uio; 285 register struct iso_node *ip = VTOI(vp); 286 register struct iso_mnt *imp; 287 struct buf *bp; 288 daddr64_t lbn, rablock; 289 off_t diff; 290 int error = 0; 291 long size, n, on; 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 struct cluster_info *ci = &ip->i_ci; 301 302 lbn = lblkno(imp, uio->uio_offset); 303 on = blkoff(imp, uio->uio_offset); 304 n = min((u_int)(imp->logical_block_size - on), 305 uio->uio_resid); 306 diff = (off_t)ip->i_size - uio->uio_offset; 307 if (diff <= 0) 308 return (0); 309 if (diff < n) 310 n = diff; 311 size = blksize(imp, ip, lbn); 312 rablock = lbn + 1; 313 #define MAX_RA 32 314 if (ci->ci_lastr + 1 == lbn) { 315 struct ra { 316 daddr64_t blks[MAX_RA]; 317 int sizes[MAX_RA]; 318 } *ra; 319 int i; 320 321 ra = malloc(sizeof *ra, M_TEMP, M_WAITOK); 322 for (i = 0; i < MAX_RA && 323 lblktosize(imp, (rablock + i)) < ip->i_size; 324 i++) { 325 ra->blks[i] = rablock + i; 326 ra->sizes[i] = blksize(imp, ip, rablock + i); 327 } 328 error = breadn(vp, lbn, size, ra->blks, 329 ra->sizes, i, NOCRED, &bp); 330 free(ra, M_TEMP); 331 } else 332 error = bread(vp, lbn, size, NOCRED, &bp); 333 ci->ci_lastr = lbn; 334 n = min(n, size - bp->b_resid); 335 if (error) { 336 brelse(bp); 337 return (error); 338 } 339 340 error = uiomove(bp->b_data + on, (int)n, uio); 341 342 if (n + on == imp->logical_block_size || 343 uio->uio_offset == (off_t)ip->i_size) 344 bp->b_flags |= B_AGE; 345 brelse(bp); 346 } while (error == 0 && uio->uio_resid > 0 && n != 0); 347 return (error); 348 } 349 350 /* ARGSUSED */ 351 int 352 cd9660_ioctl(v) 353 void *v; 354 { 355 return (ENOTTY); 356 } 357 358 /* ARGSUSED */ 359 int 360 cd9660_poll(v) 361 void *v; 362 { 363 struct vop_poll_args *ap = v; 364 365 /* 366 * We should really check to see if I/O is possible. 367 */ 368 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 369 } 370 371 /* 372 * Mmap a file 373 * 374 * NB Currently unsupported. 375 */ 376 /* ARGSUSED */ 377 int 378 cd9660_mmap(v) 379 void *v; 380 { 381 382 return (EINVAL); 383 } 384 385 /* 386 * Seek on a file 387 * 388 * Nothing to do, so just return. 389 */ 390 /* ARGSUSED */ 391 int 392 cd9660_seek(v) 393 void *v; 394 { 395 return (0); 396 } 397 398 int 399 iso_uiodir(idp,dp,off) 400 struct isoreaddir *idp; 401 struct dirent *dp; 402 off_t off; 403 { 404 int error; 405 406 dp->d_name[dp->d_namlen] = 0; 407 dp->d_reclen = DIRENT_SIZE(dp); 408 409 if (idp->uio->uio_resid < dp->d_reclen) { 410 idp->eofflag = 0; 411 return (-1); 412 } 413 414 if (idp->cookies) { 415 if (idp->ncookies <= 0) { 416 idp->eofflag = 0; 417 return (-1); 418 } 419 420 *idp->cookies++ = off; 421 --idp->ncookies; 422 } 423 424 if ((error = uiomove((caddr_t)dp, dp->d_reclen, idp->uio)) != 0) 425 return (error); 426 idp->uio_off = off; 427 return (0); 428 } 429 430 int 431 iso_shipdir(idp) 432 struct isoreaddir *idp; 433 { 434 struct dirent *dp; 435 int cl, sl, assoc; 436 int error; 437 char *cname, *sname; 438 439 cl = idp->current.d_namlen; 440 cname = idp->current.d_name; 441 442 if ((assoc = cl > 1 && *cname == ASSOCCHAR)) { 443 cl--; 444 cname++; 445 } 446 447 dp = &idp->saveent; 448 sname = dp->d_name; 449 if (!(sl = dp->d_namlen)) { 450 dp = &idp->assocent; 451 sname = dp->d_name + 1; 452 sl = dp->d_namlen - 1; 453 } 454 if (sl > 0) { 455 if (sl != cl 456 || bcmp(sname,cname,sl)) { 457 if (idp->assocent.d_namlen) { 458 error = iso_uiodir(idp, &idp->assocent, 459 idp->assocoff); 460 if (error) 461 return (error); 462 idp->assocent.d_namlen = 0; 463 } 464 if (idp->saveent.d_namlen) { 465 error = iso_uiodir(idp, &idp->saveent, 466 idp->saveoff); 467 if (error) 468 return (error); 469 idp->saveent.d_namlen = 0; 470 } 471 } 472 } 473 idp->current.d_reclen = DIRENT_SIZE(&idp->current); 474 if (assoc) { 475 idp->assocoff = idp->curroff; 476 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 477 } else { 478 idp->saveoff = idp->curroff; 479 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 480 } 481 return (0); 482 } 483 484 /* 485 * Vnode op for readdir 486 */ 487 int 488 cd9660_readdir(v) 489 void *v; 490 { 491 struct vop_readdir_args *ap = v; 492 register struct uio *uio = ap->a_uio; 493 struct isoreaddir *idp; 494 struct vnode *vdp = ap->a_vp; 495 struct iso_node *dp; 496 struct iso_mnt *imp; 497 struct buf *bp = NULL; 498 struct iso_directory_record *ep; 499 int entryoffsetinblock; 500 doff_t endsearch; 501 u_long bmask; 502 int error = 0; 503 int reclen; 504 u_short namelen; 505 int ncookies = 0; 506 u_long *cookies = NULL; 507 508 dp = VTOI(vdp); 509 imp = dp->i_mnt; 510 bmask = imp->im_bmask; 511 512 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 513 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 514 /* 515 * XXX 516 * Is it worth trying to figure out the type? 517 */ 518 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 519 DT_UNKNOWN; 520 idp->uio = uio; 521 if (ap->a_ncookies == NULL) { 522 idp->cookies = NULL; 523 } else { 524 /* 525 * Guess the number of cookies needed. 526 */ 527 ncookies = uio->uio_resid / 16; 528 cookies = malloc(ncookies * sizeof(u_long), M_TEMP, M_WAITOK); 529 idp->cookies = cookies; 530 idp->ncookies = ncookies; 531 } 532 idp->eofflag = 1; 533 idp->curroff = uio->uio_offset; 534 idp->uio_off = uio->uio_offset; 535 536 if ((entryoffsetinblock = idp->curroff & bmask) && 537 (error = cd9660_bufatoff(dp, (off_t)idp->curroff, NULL, &bp))) { 538 free(idp, M_TEMP); 539 return (error); 540 } 541 endsearch = dp->i_size; 542 543 while (idp->curroff < endsearch) { 544 /* 545 * If offset is on a block boundary, 546 * read the next directory block. 547 * Release previous if it exists. 548 */ 549 if ((idp->curroff & bmask) == 0) { 550 if (bp != NULL) 551 brelse(bp); 552 error = cd9660_bufatoff(dp, (off_t)idp->curroff, 553 NULL, &bp); 554 if (error) 555 break; 556 entryoffsetinblock = 0; 557 } 558 /* 559 * Get pointer to next entry. 560 */ 561 ep = (struct iso_directory_record *) 562 ((char *)bp->b_data + entryoffsetinblock); 563 564 reclen = isonum_711(ep->length); 565 if (reclen == 0) { 566 /* skip to next block, if any */ 567 idp->curroff = 568 (idp->curroff & ~bmask) + imp->logical_block_size; 569 continue; 570 } 571 572 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 573 error = EINVAL; 574 /* illegal entry, stop */ 575 break; 576 } 577 578 if (entryoffsetinblock + reclen > imp->logical_block_size) { 579 error = EINVAL; 580 /* illegal directory, so stop looking */ 581 break; 582 } 583 584 idp->current.d_namlen = isonum_711(ep->name_len); 585 586 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 587 error = EINVAL; 588 /* illegal entry, stop */ 589 break; 590 } 591 592 if (isonum_711(ep->flags)&2) 593 idp->current.d_fileno = isodirino(ep, imp); 594 else 595 idp->current.d_fileno = dbtob(bp->b_blkno) + 596 entryoffsetinblock; 597 598 idp->curroff += reclen; 599 600 switch (imp->iso_ftype) { 601 case ISO_FTYPE_RRIP: 602 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 603 &idp->current.d_fileno,imp); 604 idp->current.d_namlen = (u_char)namelen; 605 if (idp->current.d_namlen) 606 error = iso_uiodir(idp,&idp->current,idp->curroff); 607 break; 608 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */ 609 strlcpy(idp->current.d_name,"..", 610 sizeof idp->current.d_name); 611 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 612 idp->current.d_namlen = 1; 613 error = iso_uiodir(idp,&idp->current,idp->curroff); 614 } else if (idp->current.d_namlen == 1 && 615 ep->name[0] == 1) { 616 idp->current.d_namlen = 2; 617 error = iso_uiodir(idp,&idp->current,idp->curroff); 618 } else { 619 isofntrans(ep->name,idp->current.d_namlen, 620 idp->current.d_name, &namelen, 621 imp->iso_ftype == ISO_FTYPE_9660, 622 isonum_711(ep->flags) & 4, 623 imp->joliet_level); 624 idp->current.d_namlen = (u_char)namelen; 625 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 626 error = iso_shipdir(idp); 627 else 628 error = iso_uiodir(idp,&idp->current,idp->curroff); 629 } 630 } 631 if (error) 632 break; 633 634 entryoffsetinblock += reclen; 635 } 636 637 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 638 idp->current.d_namlen = 0; 639 error = iso_shipdir(idp); 640 } 641 if (error < 0) 642 error = 0; 643 644 if (ap->a_ncookies != NULL) { 645 if (error) 646 free(cookies, M_TEMP); 647 else { 648 /* 649 * Work out the number of cookies actually used. 650 */ 651 *ap->a_ncookies = ncookies - idp->ncookies; 652 *ap->a_cookies = cookies; 653 } 654 } 655 656 if (bp) 657 brelse (bp); 658 659 uio->uio_offset = idp->uio_off; 660 *ap->a_eofflag = idp->eofflag; 661 662 free(idp, M_TEMP); 663 664 return (error); 665 } 666 667 /* 668 * Return target name of a symbolic link 669 * Shouldn't we get the parent vnode and read the data from there? 670 * This could eventually result in deadlocks in cd9660_lookup. 671 * But otherwise the block read here is in the block buffer two times. 672 */ 673 typedef struct iso_directory_record ISODIR; 674 typedef struct iso_node ISONODE; 675 typedef struct iso_mnt ISOMNT; 676 int 677 cd9660_readlink(v) 678 void *v; 679 { 680 struct vop_readlink_args *ap = v; 681 ISONODE *ip; 682 ISODIR *dirp; 683 ISOMNT *imp; 684 struct buf *bp; 685 struct uio *uio; 686 u_short symlen; 687 int error; 688 char *symname; 689 690 ip = VTOI(ap->a_vp); 691 imp = ip->i_mnt; 692 uio = ap->a_uio; 693 694 if (imp->iso_ftype != ISO_FTYPE_RRIP) 695 return (EINVAL); 696 697 /* 698 * Get parents directory record block that this inode included. 699 */ 700 error = bread(imp->im_devvp, 701 (ip->i_number >> imp->im_bshift) << 702 (imp->im_bshift - DEV_BSHIFT), 703 imp->logical_block_size, NOCRED, &bp); 704 if (error) { 705 brelse(bp); 706 return (EINVAL); 707 } 708 709 /* 710 * Setup the directory pointer for this inode 711 */ 712 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 713 714 /* 715 * Just make sure, we have a right one.... 716 * 1: Check not cross boundary on block 717 */ 718 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 719 > imp->logical_block_size) { 720 brelse(bp); 721 return (EINVAL); 722 } 723 724 /* 725 * Now get a buffer 726 * Abuse a namei buffer for now. 727 */ 728 if (uio->uio_segflg == UIO_SYSSPACE && 729 uio->uio_iov->iov_len >= MAXPATHLEN) 730 symname = uio->uio_iov->iov_base; 731 else 732 symname = pool_get(&namei_pool, PR_WAITOK); 733 734 /* 735 * Ok, we just gathering a symbolic name in SL record. 736 */ 737 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 738 if (uio->uio_segflg != UIO_SYSSPACE || 739 uio->uio_iov->iov_len < MAXPATHLEN) 740 pool_put(&namei_pool, symname); 741 brelse(bp); 742 return (EINVAL); 743 } 744 /* 745 * Don't forget before you leave from home ;-) 746 */ 747 brelse(bp); 748 749 /* 750 * return with the symbolic name to caller's. 751 */ 752 if (uio->uio_segflg != UIO_SYSSPACE || 753 uio->uio_iov->iov_len < MAXPATHLEN) { 754 error = uiomove(symname, symlen, uio); 755 pool_put(&namei_pool, symname); 756 return (error); 757 } 758 uio->uio_resid -= symlen; 759 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 760 uio->uio_iov->iov_len -= symlen; 761 return (0); 762 } 763 764 int 765 cd9660_link(v) 766 void *v; 767 { 768 struct vop_link_args *ap = v; 769 770 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 771 vput(ap->a_dvp); 772 return (EROFS); 773 } 774 775 int 776 cd9660_symlink(v) 777 void *v; 778 { 779 struct vop_symlink_args *ap = v; 780 781 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 782 vput(ap->a_dvp); 783 return (EROFS); 784 } 785 786 /* 787 * Lock an inode. 788 */ 789 int 790 cd9660_lock(v) 791 void *v; 792 { 793 struct vop_lock_args *ap = v; 794 struct vnode *vp = ap->a_vp; 795 796 return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, NULL)); 797 } 798 799 /* 800 * Unlock an inode. 801 */ 802 int 803 cd9660_unlock(v) 804 void *v; 805 { 806 struct vop_unlock_args *ap = v; 807 struct vnode *vp = ap->a_vp; 808 809 return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE, NULL)); 810 } 811 812 /* 813 * Calculate the logical to physical mapping if not done already, 814 * then call the device strategy routine. 815 */ 816 int 817 cd9660_strategy(v) 818 void *v; 819 { 820 struct vop_strategy_args *ap = v; 821 struct buf *bp = ap->a_bp; 822 struct vnode *vp = bp->b_vp; 823 struct iso_node *ip; 824 int error; 825 int s; 826 827 ip = VTOI(vp); 828 if (vp->v_type == VBLK || vp->v_type == VCHR) 829 panic("cd9660_strategy: spec"); 830 if (bp->b_blkno == bp->b_lblkno) { 831 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 832 if (error) { 833 bp->b_error = error; 834 bp->b_flags |= B_ERROR; 835 s = splbio(); 836 biodone(bp); 837 splx(s); 838 return (error); 839 } 840 if ((long)bp->b_blkno == -1) 841 clrbuf(bp); 842 } 843 if ((long)bp->b_blkno == -1) { 844 s = splbio(); 845 biodone(bp); 846 splx(s); 847 return (0); 848 } 849 vp = ip->i_devvp; 850 bp->b_dev = vp->v_rdev; 851 (vp->v_op->vop_strategy)(ap); 852 return (0); 853 } 854 855 /* 856 * Print out the contents of an inode. 857 */ 858 /*ARGSUSED*/ 859 int 860 cd9660_print(v) 861 void *v; 862 { 863 printf("tag VT_ISOFS, isofs vnode\n"); 864 return (0); 865 } 866 867 /* 868 * Check for a locked inode. 869 */ 870 int 871 cd9660_islocked(v) 872 void *v; 873 { 874 struct vop_islocked_args *ap = v; 875 876 return (lockstatus(&VTOI(ap->a_vp)->i_lock)); 877 } 878 879 /* 880 * Return POSIX pathconf information applicable to cd9660 filesystems. 881 */ 882 int 883 cd9660_pathconf(v) 884 void *v; 885 { 886 struct vop_pathconf_args *ap = v; 887 switch (ap->a_name) { 888 case _PC_LINK_MAX: 889 *ap->a_retval = 1; 890 return (0); 891 case _PC_NAME_MAX: 892 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 893 *ap->a_retval = NAME_MAX; 894 else 895 *ap->a_retval = 37; 896 return (0); 897 case _PC_PATH_MAX: 898 *ap->a_retval = PATH_MAX; 899 return (0); 900 case _PC_PIPE_BUF: 901 *ap->a_retval = PIPE_BUF; 902 return (0); 903 case _PC_CHOWN_RESTRICTED: 904 *ap->a_retval = 1; 905 return (0); 906 case _PC_NO_TRUNC: 907 *ap->a_retval = 1; 908 return (0); 909 default: 910 return (EINVAL); 911 } 912 /* NOTREACHED */ 913 } 914 915 /* 916 * Global vfs data structures for isofs 917 */ 918 #define cd9660_create eopnotsupp 919 #define cd9660_mknod eopnotsupp 920 #define cd9660_write eopnotsupp 921 #define cd9660_fsync nullop 922 #define cd9660_remove eopnotsupp 923 #define cd9660_rename eopnotsupp 924 #define cd9660_mkdir eopnotsupp 925 #define cd9660_rmdir eopnotsupp 926 #define cd9660_advlock eopnotsupp 927 #define cd9660_valloc eopnotsupp 928 #define cd9660_vfree eopnotsupp 929 #define cd9660_truncate eopnotsupp 930 #define cd9660_update eopnotsupp 931 #define cd9660_bwrite eopnotsupp 932 #define cd9660_revoke vop_generic_revoke 933 934 /* Global vfs data structures for cd9660. */ 935 struct vops cd9660_vops = { 936 .vop_lookup = cd9660_lookup, 937 .vop_create = cd9660_create, 938 .vop_mknod = cd9660_mknod, 939 .vop_open = cd9660_open, 940 .vop_close = cd9660_close, 941 .vop_access = cd9660_access, 942 .vop_getattr = cd9660_getattr, 943 .vop_setattr = cd9660_setattr, 944 .vop_read = cd9660_read, 945 .vop_write = cd9660_write, 946 .vop_ioctl = cd9660_ioctl, 947 .vop_poll = cd9660_poll, 948 .vop_revoke = cd9660_revoke, 949 .vop_fsync = cd9660_fsync, 950 .vop_remove = cd9660_remove, 951 .vop_link = cd9660_link, 952 .vop_rename = cd9660_rename, 953 .vop_mkdir = cd9660_mkdir, 954 .vop_rmdir = cd9660_rmdir, 955 .vop_symlink = cd9660_symlink, 956 .vop_readdir = cd9660_readdir, 957 .vop_readlink = cd9660_readlink, 958 .vop_abortop = vop_generic_abortop, 959 .vop_inactive = cd9660_inactive, 960 .vop_reclaim = cd9660_reclaim, 961 .vop_lock = cd9660_lock, 962 .vop_unlock = cd9660_unlock, 963 .vop_bmap = cd9660_bmap, 964 .vop_strategy = cd9660_strategy, 965 .vop_print = cd9660_print, 966 .vop_islocked = cd9660_islocked, 967 .vop_pathconf = cd9660_pathconf, 968 .vop_advlock = cd9660_advlock, 969 .vop_bwrite = vop_generic_bwrite 970 }; 971 972 /* Special device vnode ops */ 973 struct vops cd9660_specvops = { 974 .vop_access = cd9660_access, 975 .vop_getattr = cd9660_getattr, 976 .vop_setattr = cd9660_setattr, 977 .vop_inactive = cd9660_inactive, 978 .vop_reclaim = cd9660_reclaim, 979 .vop_lock = cd9660_lock, 980 .vop_unlock = cd9660_unlock, 981 .vop_print = cd9660_print, 982 .vop_islocked = cd9660_islocked, 983 984 /* XXX: Keep in sync with spec_vops. */ 985 .vop_lookup = vop_generic_lookup, 986 .vop_create = spec_badop, 987 .vop_mknod = spec_badop, 988 .vop_open = spec_open, 989 .vop_close = spec_close, 990 .vop_read = spec_read, 991 .vop_write = spec_write, 992 .vop_ioctl = spec_ioctl, 993 .vop_poll = spec_poll, 994 .vop_kqfilter = spec_kqfilter, 995 .vop_revoke = vop_generic_revoke, 996 .vop_fsync = spec_fsync, 997 .vop_remove = spec_badop, 998 .vop_link = spec_badop, 999 .vop_rename = spec_badop, 1000 .vop_mkdir = spec_badop, 1001 .vop_rmdir = spec_badop, 1002 .vop_symlink = spec_badop, 1003 .vop_readdir = spec_badop, 1004 .vop_readlink = spec_badop, 1005 .vop_abortop = spec_badop, 1006 .vop_bmap = vop_generic_bmap, 1007 .vop_strategy = spec_strategy, 1008 .vop_pathconf = spec_pathconf, 1009 .vop_advlock = spec_advlock, 1010 .vop_bwrite = vop_generic_bwrite, 1011 }; 1012 1013 #ifdef FIFO 1014 struct vops cd9660_fifovops = { 1015 .vop_access = cd9660_access, 1016 .vop_getattr = cd9660_getattr, 1017 .vop_setattr = cd9660_setattr, 1018 .vop_inactive = cd9660_inactive, 1019 .vop_reclaim = cd9660_reclaim, 1020 .vop_lock = cd9660_lock, 1021 .vop_unlock = cd9660_unlock, 1022 .vop_print = cd9660_print, 1023 .vop_islocked = cd9660_islocked, 1024 .vop_bwrite = vop_generic_bwrite, 1025 1026 /* XXX: Keep in sync with fifo_vops. */ 1027 .vop_lookup = vop_generic_lookup, 1028 .vop_create = fifo_badop, 1029 .vop_mknod = fifo_badop, 1030 .vop_open = fifo_open, 1031 .vop_close = fifo_close, 1032 .vop_read = fifo_read, 1033 .vop_write = fifo_write, 1034 .vop_ioctl = fifo_ioctl, 1035 .vop_poll = fifo_poll, 1036 .vop_kqfilter = fifo_kqfilter, 1037 .vop_revoke = vop_generic_revoke, 1038 .vop_fsync = nullop, 1039 .vop_remove = fifo_badop, 1040 .vop_link = fifo_badop, 1041 .vop_rename = fifo_badop, 1042 .vop_mkdir = fifo_badop, 1043 .vop_rmdir = fifo_badop, 1044 .vop_symlink = fifo_badop, 1045 .vop_readdir = fifo_badop, 1046 .vop_readlink = fifo_badop, 1047 .vop_abortop = fifo_badop, 1048 .vop_bmap = vop_generic_bmap, 1049 .vop_strategy = fifo_badop, 1050 .vop_pathconf = fifo_pathconf, 1051 .vop_advlock = fifo_advlock, 1052 }; 1053 #endif /* FIFO */ 1054