1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/kernel.h> 44 #include <sys/conf.h> 45 #include <sys/stat.h> 46 #include <sys/bio.h> 47 #include <sys/buf.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/malloc.h> 51 #include <sys/dirent.h> 52 #include <sys/unistd.h> 53 #include <sys/filio.h> 54 #include <sys/sysctl.h> 55 56 #include <vm/vm.h> 57 #include <vm/vnode_pager.h> 58 #include <vm/uma.h> 59 60 #include <fs/cd9660/iso.h> 61 #include <fs/cd9660/cd9660_node.h> 62 #include <fs/cd9660/iso_rrip.h> 63 64 static vop_setattr_t cd9660_setattr; 65 static vop_open_t cd9660_open; 66 static vop_access_t cd9660_access; 67 static vop_getattr_t cd9660_getattr; 68 static vop_ioctl_t cd9660_ioctl; 69 static vop_pathconf_t cd9660_pathconf; 70 static vop_read_t cd9660_read; 71 struct isoreaddir; 72 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off); 73 static int iso_shipdir(struct isoreaddir *idp); 74 static vop_readdir_t cd9660_readdir; 75 static vop_readlink_t cd9660_readlink; 76 static vop_strategy_t cd9660_strategy; 77 static vop_vptofh_t cd9660_vptofh; 78 static vop_getpages_t cd9660_getpages; 79 80 /* 81 * Setattr call. Only allowed for block and character special devices. 82 */ 83 static int 84 cd9660_setattr(ap) 85 struct vop_setattr_args /* { 86 struct vnodeop_desc *a_desc; 87 struct vnode *a_vp; 88 struct vattr *a_vap; 89 struct ucred *a_cred; 90 } */ *ap; 91 { 92 struct vnode *vp = ap->a_vp; 93 struct vattr *vap = ap->a_vap; 94 95 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 96 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 97 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 98 return (EROFS); 99 if (vap->va_size != (u_quad_t)VNOVAL) { 100 switch (vp->v_type) { 101 case VDIR: 102 return (EISDIR); 103 case VLNK: 104 case VREG: 105 return (EROFS); 106 case VCHR: 107 case VBLK: 108 case VSOCK: 109 case VFIFO: 110 case VNON: 111 case VBAD: 112 case VMARKER: 113 return (0); 114 } 115 } 116 return (0); 117 } 118 119 /* 120 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 121 * The mode is shifted to select the owner/group/other fields. The 122 * super user is granted all permissions. 123 */ 124 /* ARGSUSED */ 125 static int 126 cd9660_access(ap) 127 struct vop_access_args /* { 128 struct vnode *a_vp; 129 accmode_t a_accmode; 130 struct ucred *a_cred; 131 struct thread *a_td; 132 } */ *ap; 133 { 134 struct vnode *vp = ap->a_vp; 135 struct iso_node *ip = VTOI(vp); 136 accmode_t accmode = ap->a_accmode; 137 138 if (vp->v_type == VCHR || vp->v_type == VBLK) 139 return (EOPNOTSUPP); 140 141 /* 142 * Disallow write attempts unless the file is a socket, 143 * fifo, or a block or character device resident on the 144 * filesystem. 145 */ 146 if (accmode & VWRITE) { 147 switch (vp->v_type) { 148 case VDIR: 149 case VLNK: 150 case VREG: 151 return (EROFS); 152 /* NOT REACHED */ 153 default: 154 break; 155 } 156 } 157 158 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 159 ip->inode.iso_gid, ap->a_accmode, ap->a_cred, NULL)); 160 } 161 162 static int 163 cd9660_open(ap) 164 struct vop_open_args /* { 165 struct vnode *a_vp; 166 int a_mode; 167 struct ucred *a_cred; 168 struct thread *a_td; 169 struct file *a_fp; 170 } */ *ap; 171 { 172 struct vnode *vp = ap->a_vp; 173 struct iso_node *ip = VTOI(vp); 174 175 if (vp->v_type == VCHR || vp->v_type == VBLK) 176 return (EOPNOTSUPP); 177 178 vnode_create_vobject(vp, ip->i_size, ap->a_td); 179 return (0); 180 } 181 182 183 static int 184 cd9660_getattr(ap) 185 struct vop_getattr_args /* { 186 struct vnode *a_vp; 187 struct vattr *a_vap; 188 struct ucred *a_cred; 189 } */ *ap; 190 191 { 192 struct vnode *vp = ap->a_vp; 193 struct vattr *vap = ap->a_vap; 194 struct iso_node *ip = VTOI(vp); 195 196 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 197 vap->va_fileid = ip->i_number; 198 199 vap->va_mode = ip->inode.iso_mode; 200 vap->va_nlink = ip->inode.iso_links; 201 vap->va_uid = ip->inode.iso_uid; 202 vap->va_gid = ip->inode.iso_gid; 203 vap->va_atime = ip->inode.iso_atime; 204 vap->va_mtime = ip->inode.iso_mtime; 205 vap->va_ctime = ip->inode.iso_ctime; 206 vap->va_rdev = ip->inode.iso_rdev; 207 208 vap->va_size = (u_quad_t) ip->i_size; 209 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 210 struct vop_readlink_args rdlnk; 211 struct iovec aiov; 212 struct uio auio; 213 char *cp; 214 215 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 216 aiov.iov_base = cp; 217 aiov.iov_len = MAXPATHLEN; 218 auio.uio_iov = &aiov; 219 auio.uio_iovcnt = 1; 220 auio.uio_offset = 0; 221 auio.uio_rw = UIO_READ; 222 auio.uio_segflg = UIO_SYSSPACE; 223 auio.uio_td = curthread; 224 auio.uio_resid = MAXPATHLEN; 225 rdlnk.a_uio = &auio; 226 rdlnk.a_vp = ap->a_vp; 227 rdlnk.a_cred = ap->a_cred; 228 if (cd9660_readlink(&rdlnk) == 0) 229 vap->va_size = MAXPATHLEN - auio.uio_resid; 230 free(cp, M_TEMP); 231 } 232 vap->va_flags = 0; 233 vap->va_gen = 1; 234 vap->va_blocksize = ip->i_mnt->logical_block_size; 235 vap->va_bytes = (u_quad_t) ip->i_size; 236 vap->va_type = vp->v_type; 237 vap->va_filerev = 0; 238 return (0); 239 } 240 241 /* 242 * Vnode op for ioctl. 243 */ 244 static int 245 cd9660_ioctl(ap) 246 struct vop_ioctl_args /* { 247 struct vnode *a_vp; 248 u_long a_command; 249 caddr_t a_data; 250 int a_fflag; 251 struct ucred *a_cred; 252 struct thread *a_td; 253 } */ *ap; 254 { 255 struct vnode *vp; 256 struct iso_node *ip; 257 int error; 258 259 vp = ap->a_vp; 260 vn_lock(vp, LK_SHARED | LK_RETRY); 261 if (vp->v_iflag & VI_DOOMED) { 262 VOP_UNLOCK(vp, 0); 263 return (EBADF); 264 } 265 if (vp->v_type == VCHR || vp->v_type == VBLK) { 266 VOP_UNLOCK(vp, 0); 267 return (EOPNOTSUPP); 268 } 269 270 ip = VTOI(vp); 271 error = 0; 272 273 switch (ap->a_command) { 274 case FIOGETLBA: 275 *(int *)(ap->a_data) = ip->iso_start; 276 break; 277 default: 278 error = ENOTTY; 279 break; 280 } 281 282 VOP_UNLOCK(vp, 0); 283 return (error); 284 } 285 286 /* 287 * Vnode op for reading. 288 */ 289 static int 290 cd9660_read(ap) 291 struct vop_read_args /* { 292 struct vnode *a_vp; 293 struct uio *a_uio; 294 int a_ioflag; 295 struct ucred *a_cred; 296 } */ *ap; 297 { 298 struct vnode *vp = ap->a_vp; 299 struct uio *uio = ap->a_uio; 300 struct iso_node *ip = VTOI(vp); 301 struct iso_mnt *imp; 302 struct buf *bp; 303 daddr_t lbn, rablock; 304 off_t diff; 305 int rasize, error = 0; 306 int seqcount; 307 long size, n, on; 308 309 if (vp->v_type == VCHR || vp->v_type == VBLK) 310 return (EOPNOTSUPP); 311 312 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 313 314 if (uio->uio_resid == 0) 315 return (0); 316 if (uio->uio_offset < 0) 317 return (EINVAL); 318 imp = ip->i_mnt; 319 do { 320 lbn = lblkno(imp, uio->uio_offset); 321 on = blkoff(imp, uio->uio_offset); 322 n = MIN(imp->logical_block_size - on, uio->uio_resid); 323 diff = (off_t)ip->i_size - uio->uio_offset; 324 if (diff <= 0) 325 return (0); 326 if (diff < n) 327 n = diff; 328 size = blksize(imp, ip, lbn); 329 rablock = lbn + 1; 330 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 331 if (lblktosize(imp, rablock) < ip->i_size) 332 error = cluster_read(vp, (off_t)ip->i_size, 333 lbn, size, NOCRED, uio->uio_resid, 334 (ap->a_ioflag >> 16), 0, &bp); 335 else 336 error = bread(vp, lbn, size, NOCRED, &bp); 337 } else { 338 if (seqcount > 1 && 339 lblktosize(imp, rablock) < ip->i_size) { 340 rasize = blksize(imp, ip, rablock); 341 error = breadn(vp, lbn, size, &rablock, 342 &rasize, 1, NOCRED, &bp); 343 } else 344 error = bread(vp, lbn, size, NOCRED, &bp); 345 } 346 if (error != 0) 347 return (error); 348 n = MIN(n, size - bp->b_resid); 349 350 error = uiomove(bp->b_data + on, (int)n, uio); 351 brelse(bp); 352 } while (error == 0 && uio->uio_resid > 0 && n != 0); 353 return (error); 354 } 355 356 /* 357 * Structure for reading directories 358 */ 359 struct isoreaddir { 360 struct dirent saveent; 361 struct dirent assocent; 362 struct dirent current; 363 off_t saveoff; 364 off_t assocoff; 365 off_t curroff; 366 struct uio *uio; 367 off_t uio_off; 368 int eofflag; 369 u_long *cookies; 370 int ncookies; 371 }; 372 373 static int 374 iso_uiodir(idp,dp,off) 375 struct isoreaddir *idp; 376 struct dirent *dp; 377 off_t off; 378 { 379 int error; 380 381 dp->d_name[dp->d_namlen] = 0; 382 dp->d_reclen = GENERIC_DIRSIZ(dp); 383 384 if (idp->uio->uio_resid < dp->d_reclen) { 385 idp->eofflag = 0; 386 return (-1); 387 } 388 389 if (idp->cookies) { 390 if (idp->ncookies <= 0) { 391 idp->eofflag = 0; 392 return (-1); 393 } 394 395 *idp->cookies++ = off; 396 --idp->ncookies; 397 } 398 399 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 400 return (error); 401 idp->uio_off = off; 402 return (0); 403 } 404 405 static int 406 iso_shipdir(idp) 407 struct isoreaddir *idp; 408 { 409 struct dirent *dp; 410 int cl, sl, assoc; 411 int error; 412 char *cname, *sname; 413 414 cl = idp->current.d_namlen; 415 cname = idp->current.d_name; 416 assoc = (cl > 1) && (*cname == ASSOCCHAR); 417 if (assoc) { 418 cl--; 419 cname++; 420 } 421 422 dp = &idp->saveent; 423 sname = dp->d_name; 424 if (!(sl = dp->d_namlen)) { 425 dp = &idp->assocent; 426 sname = dp->d_name + 1; 427 sl = dp->d_namlen - 1; 428 } 429 if (sl > 0) { 430 if (sl != cl 431 || bcmp(sname,cname,sl)) { 432 if (idp->assocent.d_namlen) { 433 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 434 return (error); 435 idp->assocent.d_namlen = 0; 436 } 437 if (idp->saveent.d_namlen) { 438 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 439 return (error); 440 idp->saveent.d_namlen = 0; 441 } 442 } 443 } 444 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 445 if (assoc) { 446 idp->assocoff = idp->curroff; 447 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 448 } else { 449 idp->saveoff = idp->curroff; 450 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 451 } 452 return (0); 453 } 454 455 /* 456 * Vnode op for readdir 457 */ 458 static int 459 cd9660_readdir(ap) 460 struct vop_readdir_args /* { 461 struct vnode *a_vp; 462 struct uio *a_uio; 463 struct ucred *a_cred; 464 int *a_eofflag; 465 int *a_ncookies; 466 u_long **a_cookies; 467 } */ *ap; 468 { 469 struct uio *uio = ap->a_uio; 470 struct isoreaddir *idp; 471 struct vnode *vdp = ap->a_vp; 472 struct iso_node *dp; 473 struct iso_mnt *imp; 474 struct buf *bp = NULL; 475 struct iso_directory_record *ep; 476 int entryoffsetinblock; 477 doff_t endsearch; 478 u_long bmask; 479 int error = 0; 480 int reclen; 481 u_short namelen; 482 int ncookies = 0; 483 u_long *cookies = NULL; 484 cd_ino_t ino; 485 486 dp = VTOI(vdp); 487 imp = dp->i_mnt; 488 bmask = imp->im_bmask; 489 490 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 491 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 492 /* 493 * XXX 494 * Is it worth trying to figure out the type? 495 */ 496 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 497 DT_UNKNOWN; 498 idp->uio = uio; 499 if (ap->a_ncookies == NULL) { 500 idp->cookies = NULL; 501 } else { 502 /* 503 * Guess the number of cookies needed. 504 */ 505 ncookies = uio->uio_resid / 16; 506 cookies = malloc(ncookies * sizeof(u_long), 507 M_TEMP, M_WAITOK); 508 idp->cookies = cookies; 509 idp->ncookies = ncookies; 510 } 511 idp->eofflag = 1; 512 idp->curroff = uio->uio_offset; 513 idp->uio_off = uio->uio_offset; 514 515 if ((entryoffsetinblock = idp->curroff & bmask) && 516 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 517 free(idp, M_TEMP); 518 return (error); 519 } 520 endsearch = dp->i_size; 521 522 while (idp->curroff < endsearch) { 523 /* 524 * If offset is on a block boundary, 525 * read the next directory block. 526 * Release previous if it exists. 527 */ 528 if ((idp->curroff & bmask) == 0) { 529 if (bp != NULL) 530 brelse(bp); 531 if ((error = 532 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 533 break; 534 entryoffsetinblock = 0; 535 } 536 /* 537 * Get pointer to next entry. 538 */ 539 ep = (struct iso_directory_record *) 540 ((char *)bp->b_data + entryoffsetinblock); 541 542 reclen = isonum_711(ep->length); 543 if (reclen == 0) { 544 /* skip to next block, if any */ 545 idp->curroff = 546 (idp->curroff & ~bmask) + imp->logical_block_size; 547 continue; 548 } 549 550 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 551 error = EINVAL; 552 /* illegal entry, stop */ 553 break; 554 } 555 556 if (entryoffsetinblock + reclen > imp->logical_block_size) { 557 error = EINVAL; 558 /* illegal directory, so stop looking */ 559 break; 560 } 561 562 idp->current.d_namlen = isonum_711(ep->name_len); 563 564 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 565 error = EINVAL; 566 /* illegal entry, stop */ 567 break; 568 } 569 570 if (isonum_711(ep->flags)&2) 571 idp->current.d_fileno = isodirino(ep, imp); 572 else 573 idp->current.d_fileno = dbtob(bp->b_blkno) + 574 entryoffsetinblock; 575 576 idp->curroff += reclen; 577 578 switch (imp->iso_ftype) { 579 case ISO_FTYPE_RRIP: 580 ino = idp->current.d_fileno; 581 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 582 &ino, imp); 583 idp->current.d_fileno = ino; 584 idp->current.d_namlen = (u_char)namelen; 585 if (idp->current.d_namlen) 586 error = iso_uiodir(idp,&idp->current,idp->curroff); 587 break; 588 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 589 strcpy(idp->current.d_name,".."); 590 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 591 idp->current.d_namlen = 1; 592 error = iso_uiodir(idp,&idp->current,idp->curroff); 593 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 594 idp->current.d_namlen = 2; 595 error = iso_uiodir(idp,&idp->current,idp->curroff); 596 } else { 597 isofntrans(ep->name,idp->current.d_namlen, 598 idp->current.d_name, &namelen, 599 imp->iso_ftype == ISO_FTYPE_9660, 600 isonum_711(ep->flags)&4, 601 imp->joliet_level, 602 imp->im_flags, 603 imp->im_d2l); 604 idp->current.d_namlen = (u_char)namelen; 605 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 606 error = iso_shipdir(idp); 607 else 608 error = iso_uiodir(idp,&idp->current,idp->curroff); 609 } 610 } 611 if (error) 612 break; 613 614 entryoffsetinblock += reclen; 615 } 616 617 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 618 idp->current.d_namlen = 0; 619 error = iso_shipdir(idp); 620 } 621 if (error < 0) 622 error = 0; 623 624 if (ap->a_ncookies != NULL) { 625 if (error) 626 free(cookies, M_TEMP); 627 else { 628 /* 629 * Work out the number of cookies actually used. 630 */ 631 *ap->a_ncookies = ncookies - idp->ncookies; 632 *ap->a_cookies = cookies; 633 } 634 } 635 636 if (bp) 637 brelse (bp); 638 639 uio->uio_offset = idp->uio_off; 640 *ap->a_eofflag = idp->eofflag; 641 642 free(idp, M_TEMP); 643 644 return (error); 645 } 646 647 /* 648 * Return target name of a symbolic link 649 * Shouldn't we get the parent vnode and read the data from there? 650 * This could eventually result in deadlocks in cd9660_lookup. 651 * But otherwise the block read here is in the block buffer two times. 652 */ 653 typedef struct iso_directory_record ISODIR; 654 typedef struct iso_node ISONODE; 655 typedef struct iso_mnt ISOMNT; 656 static int 657 cd9660_readlink(ap) 658 struct vop_readlink_args /* { 659 struct vnode *a_vp; 660 struct uio *a_uio; 661 struct ucred *a_cred; 662 } */ *ap; 663 { 664 ISONODE *ip; 665 ISODIR *dirp; 666 ISOMNT *imp; 667 struct buf *bp; 668 struct uio *uio; 669 u_short symlen; 670 int error; 671 char *symname; 672 673 ip = VTOI(ap->a_vp); 674 imp = ip->i_mnt; 675 uio = ap->a_uio; 676 677 if (imp->iso_ftype != ISO_FTYPE_RRIP) 678 return (EINVAL); 679 680 /* 681 * Get parents directory record block that this inode included. 682 */ 683 error = bread(imp->im_devvp, 684 (ip->i_number >> imp->im_bshift) << 685 (imp->im_bshift - DEV_BSHIFT), 686 imp->logical_block_size, NOCRED, &bp); 687 if (error) { 688 brelse(bp); 689 return (EINVAL); 690 } 691 692 /* 693 * Setup the directory pointer for this inode 694 */ 695 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 696 697 /* 698 * Just make sure, we have a right one.... 699 * 1: Check not cross boundary on block 700 */ 701 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 702 > (unsigned)imp->logical_block_size) { 703 brelse(bp); 704 return (EINVAL); 705 } 706 707 /* 708 * Now get a buffer 709 * Abuse a namei buffer for now. 710 */ 711 if (uio->uio_segflg == UIO_SYSSPACE) 712 symname = uio->uio_iov->iov_base; 713 else 714 symname = uma_zalloc(namei_zone, M_WAITOK); 715 716 /* 717 * Ok, we just gathering a symbolic name in SL record. 718 */ 719 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 720 if (uio->uio_segflg != UIO_SYSSPACE) 721 uma_zfree(namei_zone, symname); 722 brelse(bp); 723 return (EINVAL); 724 } 725 /* 726 * Don't forget before you leave from home ;-) 727 */ 728 brelse(bp); 729 730 /* 731 * return with the symbolic name to caller's. 732 */ 733 if (uio->uio_segflg != UIO_SYSSPACE) { 734 error = uiomove(symname, symlen, uio); 735 uma_zfree(namei_zone, symname); 736 return (error); 737 } 738 uio->uio_resid -= symlen; 739 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 740 uio->uio_iov->iov_len -= symlen; 741 return (0); 742 } 743 744 /* 745 * Calculate the logical to physical mapping if not done already, 746 * then call the device strategy routine. 747 */ 748 static int 749 cd9660_strategy(ap) 750 struct vop_strategy_args /* { 751 struct buf *a_vp; 752 struct buf *a_bp; 753 } */ *ap; 754 { 755 struct buf *bp = ap->a_bp; 756 struct vnode *vp = ap->a_vp; 757 struct iso_node *ip; 758 struct bufobj *bo; 759 760 ip = VTOI(vp); 761 if (vp->v_type == VBLK || vp->v_type == VCHR) 762 panic("cd9660_strategy: spec"); 763 if (bp->b_blkno == bp->b_lblkno) { 764 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 765 (ip->i_mnt->im_bshift - DEV_BSHIFT); 766 } 767 bp->b_iooffset = dbtob(bp->b_blkno); 768 bo = ip->i_mnt->im_bo; 769 BO_STRATEGY(bo, bp); 770 return (0); 771 } 772 773 /* 774 * Return POSIX pathconf information applicable to cd9660 filesystems. 775 */ 776 static int 777 cd9660_pathconf(ap) 778 struct vop_pathconf_args /* { 779 struct vnode *a_vp; 780 int a_name; 781 register_t *a_retval; 782 } */ *ap; 783 { 784 785 switch (ap->a_name) { 786 case _PC_LINK_MAX: 787 *ap->a_retval = 1; 788 return (0); 789 case _PC_NAME_MAX: 790 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 791 *ap->a_retval = NAME_MAX; 792 else 793 *ap->a_retval = 37; 794 return (0); 795 case _PC_NO_TRUNC: 796 *ap->a_retval = 1; 797 return (0); 798 default: 799 return (vop_stdpathconf(ap)); 800 } 801 /* NOTREACHED */ 802 } 803 804 /* 805 * Vnode pointer to File handle 806 */ 807 static int 808 cd9660_vptofh(ap) 809 struct vop_vptofh_args /* { 810 struct vnode *a_vp; 811 struct fid *a_fhp; 812 } */ *ap; 813 { 814 struct ifid ifh; 815 struct iso_node *ip = VTOI(ap->a_vp); 816 817 ifh.ifid_len = sizeof(struct ifid); 818 819 ifh.ifid_ino = ip->i_number; 820 ifh.ifid_start = ip->iso_start; 821 /* 822 * This intentionally uses sizeof(ifh) in order to not copy stack 823 * garbage on ILP32. 824 */ 825 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 826 827 #ifdef ISOFS_DBG 828 printf("vptofh: ino %jd, start %ld\n", 829 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 830 #endif 831 832 return (0); 833 } 834 835 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "cd9660 filesystem"); 836 static int use_buf_pager = 1; 837 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 838 &use_buf_pager, 0, 839 "Use buffer pager instead of bmap"); 840 841 static daddr_t 842 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 843 { 844 845 return (lblkno(VTOI(vp)->i_mnt, off)); 846 } 847 848 static int 849 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn) 850 { 851 struct iso_node *ip; 852 853 ip = VTOI(vp); 854 return (blksize(ip->i_mnt, ip, lbn)); 855 } 856 857 static int 858 cd9660_getpages(struct vop_getpages_args *ap) 859 { 860 struct vnode *vp; 861 862 vp = ap->a_vp; 863 if (vp->v_type == VCHR || vp->v_type == VBLK) 864 return (EOPNOTSUPP); 865 866 if (use_buf_pager) 867 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 868 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 869 cd9660_gbp_getblksz)); 870 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 871 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 872 } 873 874 /* 875 * Global vfs data structures for cd9660 876 */ 877 struct vop_vector cd9660_vnodeops = { 878 .vop_default = &default_vnodeops, 879 .vop_open = cd9660_open, 880 .vop_access = cd9660_access, 881 .vop_bmap = cd9660_bmap, 882 .vop_cachedlookup = cd9660_lookup, 883 .vop_getattr = cd9660_getattr, 884 .vop_inactive = cd9660_inactive, 885 .vop_ioctl = cd9660_ioctl, 886 .vop_lookup = vfs_cache_lookup, 887 .vop_pathconf = cd9660_pathconf, 888 .vop_read = cd9660_read, 889 .vop_readdir = cd9660_readdir, 890 .vop_readlink = cd9660_readlink, 891 .vop_reclaim = cd9660_reclaim, 892 .vop_setattr = cd9660_setattr, 893 .vop_strategy = cd9660_strategy, 894 .vop_vptofh = cd9660_vptofh, 895 .vop_getpages = cd9660_getpages, 896 }; 897 898 /* 899 * Special device vnode ops 900 */ 901 902 struct vop_vector cd9660_fifoops = { 903 .vop_default = &fifo_specops, 904 .vop_access = cd9660_access, 905 .vop_getattr = cd9660_getattr, 906 .vop_inactive = cd9660_inactive, 907 .vop_reclaim = cd9660_reclaim, 908 .vop_setattr = cd9660_setattr, 909 .vop_vptofh = cd9660_vptofh, 910 }; 911