1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/namei.h> 45 #include <sys/kernel.h> 46 #include <sys/conf.h> 47 #include <sys/stat.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.h> 52 #include <sys/malloc.h> 53 #include <sys/dirent.h> 54 #include <sys/unistd.h> 55 #include <sys/filio.h> 56 #include <sys/sysctl.h> 57 58 #include <vm/vm.h> 59 #include <vm/vnode_pager.h> 60 #include <vm/uma.h> 61 62 #include <fs/cd9660/iso.h> 63 #include <fs/cd9660/cd9660_node.h> 64 #include <fs/cd9660/iso_rrip.h> 65 66 static vop_setattr_t cd9660_setattr; 67 static vop_open_t cd9660_open; 68 static vop_access_t cd9660_access; 69 static vop_getattr_t cd9660_getattr; 70 static vop_ioctl_t cd9660_ioctl; 71 static vop_pathconf_t cd9660_pathconf; 72 static vop_read_t cd9660_read; 73 struct isoreaddir; 74 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off); 75 static int iso_shipdir(struct isoreaddir *idp); 76 static vop_readdir_t cd9660_readdir; 77 static vop_readlink_t cd9660_readlink; 78 static vop_strategy_t cd9660_strategy; 79 static vop_vptofh_t cd9660_vptofh; 80 static vop_getpages_t cd9660_getpages; 81 82 /* 83 * Setattr call. Only allowed for block and character special devices. 84 */ 85 static int 86 cd9660_setattr(ap) 87 struct vop_setattr_args /* { 88 struct vnodeop_desc *a_desc; 89 struct vnode *a_vp; 90 struct vattr *a_vap; 91 struct ucred *a_cred; 92 } */ *ap; 93 { 94 struct vnode *vp = ap->a_vp; 95 struct vattr *vap = ap->a_vap; 96 97 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 98 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 99 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 100 return (EROFS); 101 if (vap->va_size != (u_quad_t)VNOVAL) { 102 switch (vp->v_type) { 103 case VDIR: 104 return (EISDIR); 105 case VLNK: 106 case VREG: 107 return (EROFS); 108 case VCHR: 109 case VBLK: 110 case VSOCK: 111 case VFIFO: 112 case VNON: 113 case VBAD: 114 case VMARKER: 115 return (0); 116 } 117 } 118 return (0); 119 } 120 121 /* 122 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 123 * The mode is shifted to select the owner/group/other fields. The 124 * super user is granted all permissions. 125 */ 126 /* ARGSUSED */ 127 static int 128 cd9660_access(ap) 129 struct vop_access_args /* { 130 struct vnode *a_vp; 131 accmode_t a_accmode; 132 struct ucred *a_cred; 133 struct thread *a_td; 134 } */ *ap; 135 { 136 struct vnode *vp = ap->a_vp; 137 struct iso_node *ip = VTOI(vp); 138 accmode_t accmode = ap->a_accmode; 139 140 if (vp->v_type == VCHR || vp->v_type == VBLK) 141 return (EOPNOTSUPP); 142 143 /* 144 * Disallow write attempts unless the file is a socket, 145 * fifo, or a block or character device resident on the 146 * filesystem. 147 */ 148 if (accmode & VWRITE) { 149 switch (vp->v_type) { 150 case VDIR: 151 case VLNK: 152 case VREG: 153 return (EROFS); 154 /* NOT REACHED */ 155 default: 156 break; 157 } 158 } 159 160 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 161 ip->inode.iso_gid, ap->a_accmode, ap->a_cred)); 162 } 163 164 static int 165 cd9660_open(ap) 166 struct vop_open_args /* { 167 struct vnode *a_vp; 168 int a_mode; 169 struct ucred *a_cred; 170 struct thread *a_td; 171 struct file *a_fp; 172 } */ *ap; 173 { 174 struct vnode *vp = ap->a_vp; 175 struct iso_node *ip = VTOI(vp); 176 177 if (vp->v_type == VCHR || vp->v_type == VBLK) 178 return (EOPNOTSUPP); 179 180 vnode_create_vobject(vp, ip->i_size, ap->a_td); 181 return (0); 182 } 183 184 static int 185 cd9660_getattr(ap) 186 struct vop_getattr_args /* { 187 struct vnode *a_vp; 188 struct vattr *a_vap; 189 struct ucred *a_cred; 190 } */ *ap; 191 192 { 193 struct vnode *vp = ap->a_vp; 194 struct vattr *vap = ap->a_vap; 195 struct iso_node *ip = VTOI(vp); 196 197 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 198 vap->va_fileid = ip->i_number; 199 200 vap->va_mode = ip->inode.iso_mode; 201 vap->va_nlink = ip->inode.iso_links; 202 vap->va_uid = ip->inode.iso_uid; 203 vap->va_gid = ip->inode.iso_gid; 204 vap->va_atime = ip->inode.iso_atime; 205 vap->va_mtime = ip->inode.iso_mtime; 206 vap->va_ctime = ip->inode.iso_ctime; 207 vap->va_rdev = ip->inode.iso_rdev; 208 209 vap->va_size = (u_quad_t) ip->i_size; 210 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 211 struct vop_readlink_args rdlnk; 212 struct iovec aiov; 213 struct uio auio; 214 char *cp; 215 216 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 217 aiov.iov_base = cp; 218 aiov.iov_len = MAXPATHLEN; 219 auio.uio_iov = &aiov; 220 auio.uio_iovcnt = 1; 221 auio.uio_offset = 0; 222 auio.uio_rw = UIO_READ; 223 auio.uio_segflg = UIO_SYSSPACE; 224 auio.uio_td = curthread; 225 auio.uio_resid = MAXPATHLEN; 226 rdlnk.a_uio = &auio; 227 rdlnk.a_vp = ap->a_vp; 228 rdlnk.a_cred = ap->a_cred; 229 if (cd9660_readlink(&rdlnk) == 0) 230 vap->va_size = MAXPATHLEN - auio.uio_resid; 231 free(cp, M_TEMP); 232 } 233 vap->va_flags = 0; 234 vap->va_gen = 1; 235 vap->va_blocksize = ip->i_mnt->logical_block_size; 236 vap->va_bytes = (u_quad_t) ip->i_size; 237 vap->va_type = vp->v_type; 238 vap->va_filerev = 0; 239 return (0); 240 } 241 242 /* 243 * Vnode op for ioctl. 244 */ 245 static int 246 cd9660_ioctl(ap) 247 struct vop_ioctl_args /* { 248 struct vnode *a_vp; 249 u_long a_command; 250 caddr_t a_data; 251 int a_fflag; 252 struct ucred *a_cred; 253 struct thread *a_td; 254 } */ *ap; 255 { 256 struct vnode *vp; 257 struct iso_node *ip; 258 int error; 259 260 vp = ap->a_vp; 261 vn_lock(vp, LK_SHARED | LK_RETRY); 262 if (VN_IS_DOOMED(vp)) { 263 VOP_UNLOCK(vp); 264 return (EBADF); 265 } 266 if (vp->v_type == VCHR || vp->v_type == VBLK) { 267 VOP_UNLOCK(vp); 268 return (EOPNOTSUPP); 269 } 270 271 ip = VTOI(vp); 272 error = 0; 273 274 switch (ap->a_command) { 275 case FIOGETLBA: 276 *(int *)(ap->a_data) = ip->iso_start; 277 break; 278 default: 279 error = ENOTTY; 280 break; 281 } 282 283 VOP_UNLOCK(vp); 284 return (error); 285 } 286 287 /* 288 * Vnode op for reading. 289 */ 290 static int 291 cd9660_read(ap) 292 struct vop_read_args /* { 293 struct vnode *a_vp; 294 struct uio *a_uio; 295 int a_ioflag; 296 struct ucred *a_cred; 297 } */ *ap; 298 { 299 struct vnode *vp = ap->a_vp; 300 struct uio *uio = ap->a_uio; 301 struct iso_node *ip = VTOI(vp); 302 struct iso_mnt *imp; 303 struct buf *bp; 304 daddr_t lbn, rablock; 305 off_t diff; 306 int rasize, error = 0; 307 int seqcount; 308 long size, n, on; 309 310 if (vp->v_type == VCHR || vp->v_type == VBLK) 311 return (EOPNOTSUPP); 312 313 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 314 315 if (uio->uio_resid == 0) 316 return (0); 317 if (uio->uio_offset < 0) 318 return (EINVAL); 319 imp = ip->i_mnt; 320 do { 321 lbn = lblkno(imp, uio->uio_offset); 322 on = blkoff(imp, uio->uio_offset); 323 n = MIN(imp->logical_block_size - on, uio->uio_resid); 324 diff = (off_t)ip->i_size - uio->uio_offset; 325 if (diff <= 0) 326 return (0); 327 if (diff < n) 328 n = diff; 329 size = blksize(imp, ip, lbn); 330 rablock = lbn + 1; 331 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 332 if (lblktosize(imp, rablock) < ip->i_size) 333 error = cluster_read(vp, (off_t)ip->i_size, 334 lbn, size, NOCRED, uio->uio_resid, 335 (ap->a_ioflag >> 16), 0, &bp); 336 else 337 error = bread(vp, lbn, size, NOCRED, &bp); 338 } else { 339 if (seqcount > 1 && 340 lblktosize(imp, rablock) < ip->i_size) { 341 rasize = blksize(imp, ip, rablock); 342 error = breadn(vp, lbn, size, &rablock, 343 &rasize, 1, NOCRED, &bp); 344 } else 345 error = bread(vp, lbn, size, NOCRED, &bp); 346 } 347 if (error != 0) 348 return (error); 349 n = MIN(n, size - bp->b_resid); 350 351 error = uiomove(bp->b_data + on, (int)n, uio); 352 brelse(bp); 353 } while (error == 0 && uio->uio_resid > 0 && n != 0); 354 return (error); 355 } 356 357 /* 358 * Structure for reading directories 359 */ 360 struct isoreaddir { 361 struct dirent saveent; 362 struct dirent assocent; 363 struct dirent current; 364 off_t saveoff; 365 off_t assocoff; 366 off_t curroff; 367 struct uio *uio; 368 off_t uio_off; 369 int eofflag; 370 uint64_t *cookies; 371 int ncookies; 372 }; 373 374 static int 375 iso_uiodir(idp,dp,off) 376 struct isoreaddir *idp; 377 struct dirent *dp; 378 off_t off; 379 { 380 int error; 381 382 dp->d_reclen = GENERIC_DIRSIZ(dp); 383 dirent_terminate(dp); 384 385 if (idp->uio->uio_resid < dp->d_reclen) { 386 idp->eofflag = 0; 387 return (-1); 388 } 389 390 if (idp->cookies) { 391 if (idp->ncookies <= 0) { 392 idp->eofflag = 0; 393 return (-1); 394 } 395 396 *idp->cookies++ = off; 397 --idp->ncookies; 398 } 399 400 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 401 return (error); 402 idp->uio_off = off; 403 return (0); 404 } 405 406 static int 407 iso_shipdir(idp) 408 struct isoreaddir *idp; 409 { 410 struct dirent *dp; 411 int cl, sl, assoc; 412 int error; 413 char *cname, *sname; 414 415 cl = idp->current.d_namlen; 416 cname = idp->current.d_name; 417 assoc = (cl > 1) && (*cname == ASSOCCHAR); 418 if (assoc) { 419 cl--; 420 cname++; 421 } 422 423 dp = &idp->saveent; 424 sname = dp->d_name; 425 if (!(sl = dp->d_namlen)) { 426 dp = &idp->assocent; 427 sname = dp->d_name + 1; 428 sl = dp->d_namlen - 1; 429 } 430 if (sl > 0) { 431 if (sl != cl 432 || bcmp(sname,cname,sl)) { 433 if (idp->assocent.d_namlen) { 434 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 435 return (error); 436 idp->assocent.d_namlen = 0; 437 } 438 if (idp->saveent.d_namlen) { 439 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 440 return (error); 441 idp->saveent.d_namlen = 0; 442 } 443 } 444 } 445 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 446 if (assoc) { 447 idp->assocoff = idp->curroff; 448 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 449 } else { 450 idp->saveoff = idp->curroff; 451 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 452 } 453 return (0); 454 } 455 456 /* 457 * Vnode op for readdir 458 */ 459 static int 460 cd9660_readdir(ap) 461 struct vop_readdir_args /* { 462 struct vnode *a_vp; 463 struct uio *a_uio; 464 struct ucred *a_cred; 465 int *a_eofflag; 466 int *a_ncookies; 467 uint64_t **a_cookies; 468 } */ *ap; 469 { 470 struct uio *uio = ap->a_uio; 471 struct isoreaddir *idp; 472 struct vnode *vdp = ap->a_vp; 473 struct iso_node *dp; 474 struct iso_mnt *imp; 475 struct buf *bp = NULL; 476 struct iso_directory_record *ep; 477 int entryoffsetinblock; 478 doff_t endsearch; 479 u_long bmask; 480 int error = 0; 481 int reclen; 482 u_short namelen; 483 u_int ncookies = 0; 484 uint64_t *cookies = NULL; 485 cd_ino_t ino; 486 487 dp = VTOI(vdp); 488 imp = dp->i_mnt; 489 bmask = imp->im_bmask; 490 491 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 492 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 493 /* 494 * XXX 495 * Is it worth trying to figure out the type? 496 */ 497 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 498 DT_UNKNOWN; 499 idp->uio = uio; 500 if (ap->a_ncookies == NULL) { 501 idp->cookies = NULL; 502 } else { 503 /* 504 * Guess the number of cookies needed. 505 */ 506 ncookies = uio->uio_resid / 16; 507 cookies = malloc(ncookies * sizeof(*cookies), 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 /* NOTE: d_off is the offset of *next* entry. */ 578 idp->current.d_off = idp->curroff; 579 580 switch (imp->iso_ftype) { 581 case ISO_FTYPE_RRIP: 582 ino = idp->current.d_fileno; 583 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 584 &ino, imp); 585 idp->current.d_fileno = ino; 586 idp->current.d_namlen = (u_char)namelen; 587 if (idp->current.d_namlen) 588 error = iso_uiodir(idp,&idp->current,idp->curroff); 589 break; 590 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 591 strcpy(idp->current.d_name,".."); 592 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 593 idp->current.d_namlen = 1; 594 error = iso_uiodir(idp,&idp->current,idp->curroff); 595 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 596 idp->current.d_namlen = 2; 597 error = iso_uiodir(idp,&idp->current,idp->curroff); 598 } else { 599 isofntrans(ep->name,idp->current.d_namlen, 600 idp->current.d_name, &namelen, 601 imp->iso_ftype == ISO_FTYPE_9660, 602 isonum_711(ep->flags)&4, 603 imp->joliet_level, 604 imp->im_flags, 605 imp->im_d2l); 606 idp->current.d_namlen = (u_char)namelen; 607 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 608 error = iso_shipdir(idp); 609 else 610 error = iso_uiodir(idp,&idp->current,idp->curroff); 611 } 612 } 613 if (error) 614 break; 615 616 entryoffsetinblock += reclen; 617 } 618 619 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 620 idp->current.d_namlen = 0; 621 error = iso_shipdir(idp); 622 } 623 if (error < 0) 624 error = 0; 625 626 if (ap->a_ncookies != NULL) { 627 if (error) 628 free(cookies, M_TEMP); 629 else { 630 /* 631 * Work out the number of cookies actually used. 632 */ 633 *ap->a_ncookies = ncookies - idp->ncookies; 634 *ap->a_cookies = cookies; 635 } 636 } 637 638 if (bp) 639 brelse (bp); 640 641 uio->uio_offset = idp->uio_off; 642 *ap->a_eofflag = idp->eofflag; 643 644 free(idp, M_TEMP); 645 646 return (error); 647 } 648 649 /* 650 * Return target name of a symbolic link 651 * Shouldn't we get the parent vnode and read the data from there? 652 * This could eventually result in deadlocks in cd9660_lookup. 653 * But otherwise the block read here is in the block buffer two times. 654 */ 655 typedef struct iso_directory_record ISODIR; 656 typedef struct iso_node ISONODE; 657 typedef struct iso_mnt ISOMNT; 658 static int 659 cd9660_readlink(ap) 660 struct vop_readlink_args /* { 661 struct vnode *a_vp; 662 struct uio *a_uio; 663 struct ucred *a_cred; 664 } */ *ap; 665 { 666 ISONODE *ip; 667 ISODIR *dirp; 668 ISOMNT *imp; 669 struct buf *bp; 670 struct uio *uio; 671 u_short symlen; 672 int error; 673 char *symname; 674 675 ip = VTOI(ap->a_vp); 676 imp = ip->i_mnt; 677 uio = ap->a_uio; 678 679 if (imp->iso_ftype != ISO_FTYPE_RRIP) 680 return (EINVAL); 681 682 /* 683 * Get parents directory record block that this inode included. 684 */ 685 error = bread(imp->im_devvp, 686 (ip->i_number >> imp->im_bshift) << 687 (imp->im_bshift - DEV_BSHIFT), 688 imp->logical_block_size, NOCRED, &bp); 689 if (error) { 690 return (EINVAL); 691 } 692 693 /* 694 * Setup the directory pointer for this inode 695 */ 696 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 697 698 /* 699 * Just make sure, we have a right one.... 700 * 1: Check not cross boundary on block 701 */ 702 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 703 > (unsigned)imp->logical_block_size) { 704 brelse(bp); 705 return (EINVAL); 706 } 707 708 /* 709 * Now get a buffer 710 * Abuse a namei buffer for now. 711 */ 712 if (uio->uio_segflg == UIO_SYSSPACE) 713 symname = uio->uio_iov->iov_base; 714 else 715 symname = uma_zalloc(namei_zone, M_WAITOK); 716 717 /* 718 * Ok, we just gathering a symbolic name in SL record. 719 */ 720 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 721 if (uio->uio_segflg != UIO_SYSSPACE) 722 uma_zfree(namei_zone, symname); 723 brelse(bp); 724 return (EINVAL); 725 } 726 /* 727 * Don't forget before you leave from home ;-) 728 */ 729 brelse(bp); 730 731 /* 732 * return with the symbolic name to caller's. 733 */ 734 if (uio->uio_segflg != UIO_SYSSPACE) { 735 error = uiomove(symname, symlen, uio); 736 uma_zfree(namei_zone, symname); 737 return (error); 738 } 739 uio->uio_resid -= symlen; 740 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 741 uio->uio_iov->iov_len -= symlen; 742 return (0); 743 } 744 745 /* 746 * Calculate the logical to physical mapping if not done already, 747 * then call the device strategy routine. 748 */ 749 static int 750 cd9660_strategy(ap) 751 struct vop_strategy_args /* { 752 struct buf *a_vp; 753 struct buf *a_bp; 754 } */ *ap; 755 { 756 struct buf *bp = ap->a_bp; 757 struct vnode *vp = ap->a_vp; 758 struct iso_node *ip; 759 struct bufobj *bo; 760 761 ip = VTOI(vp); 762 if (vp->v_type == VBLK || vp->v_type == VCHR) 763 panic("cd9660_strategy: spec"); 764 if (bp->b_blkno == bp->b_lblkno) { 765 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 766 (ip->i_mnt->im_bshift - DEV_BSHIFT); 767 } 768 bp->b_iooffset = dbtob(bp->b_blkno); 769 bo = ip->i_mnt->im_bo; 770 BO_STRATEGY(bo, bp); 771 return (0); 772 } 773 774 /* 775 * Return POSIX pathconf information applicable to cd9660 filesystems. 776 */ 777 static int 778 cd9660_pathconf(ap) 779 struct vop_pathconf_args /* { 780 struct vnode *a_vp; 781 int a_name; 782 register_t *a_retval; 783 } */ *ap; 784 { 785 786 switch (ap->a_name) { 787 case _PC_FILESIZEBITS: 788 *ap->a_retval = 32; 789 return (0); 790 case _PC_LINK_MAX: 791 *ap->a_retval = 1; 792 return (0); 793 case _PC_NAME_MAX: 794 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 795 *ap->a_retval = NAME_MAX; 796 else 797 *ap->a_retval = 37; 798 return (0); 799 case _PC_SYMLINK_MAX: 800 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 801 *ap->a_retval = MAXPATHLEN; 802 return (0); 803 } 804 return (EINVAL); 805 case _PC_NO_TRUNC: 806 *ap->a_retval = 1; 807 return (0); 808 default: 809 return (vop_stdpathconf(ap)); 810 } 811 /* NOTREACHED */ 812 } 813 814 /* 815 * Vnode pointer to File handle 816 */ 817 static int 818 cd9660_vptofh(ap) 819 struct vop_vptofh_args /* { 820 struct vnode *a_vp; 821 struct fid *a_fhp; 822 } */ *ap; 823 { 824 struct ifid ifh; 825 struct iso_node *ip = VTOI(ap->a_vp); 826 827 ifh.ifid_len = sizeof(struct ifid); 828 829 ifh.ifid_ino = ip->i_number; 830 ifh.ifid_start = ip->iso_start; 831 /* 832 * This intentionally uses sizeof(ifh) in order to not copy stack 833 * garbage on ILP32. 834 */ 835 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 836 837 #ifdef ISOFS_DBG 838 printf("vptofh: ino %jd, start %ld\n", 839 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 840 #endif 841 842 return (0); 843 } 844 845 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 846 "cd9660 filesystem"); 847 static int use_buf_pager = 1; 848 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 849 &use_buf_pager, 0, 850 "Use buffer pager instead of bmap"); 851 852 static daddr_t 853 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 854 { 855 856 return (lblkno(VTOI(vp)->i_mnt, off)); 857 } 858 859 static int 860 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz) 861 { 862 struct iso_node *ip; 863 864 ip = VTOI(vp); 865 *sz = blksize(ip->i_mnt, ip, lbn); 866 return (0); 867 } 868 869 static int 870 cd9660_getpages(struct vop_getpages_args *ap) 871 { 872 struct vnode *vp; 873 874 vp = ap->a_vp; 875 if (vp->v_type == VCHR || vp->v_type == VBLK) 876 return (EOPNOTSUPP); 877 878 if (use_buf_pager) 879 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 880 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 881 cd9660_gbp_getblksz)); 882 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 883 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 884 } 885 886 /* 887 * Global vfs data structures for cd9660 888 */ 889 struct vop_vector cd9660_vnodeops = { 890 .vop_default = &default_vnodeops, 891 .vop_open = cd9660_open, 892 .vop_access = cd9660_access, 893 .vop_bmap = cd9660_bmap, 894 .vop_cachedlookup = cd9660_lookup, 895 .vop_getattr = cd9660_getattr, 896 .vop_inactive = cd9660_inactive, 897 .vop_ioctl = cd9660_ioctl, 898 .vop_lookup = vfs_cache_lookup, 899 .vop_pathconf = cd9660_pathconf, 900 .vop_read = cd9660_read, 901 .vop_readdir = cd9660_readdir, 902 .vop_readlink = cd9660_readlink, 903 .vop_reclaim = cd9660_reclaim, 904 .vop_setattr = cd9660_setattr, 905 .vop_strategy = cd9660_strategy, 906 .vop_vptofh = cd9660_vptofh, 907 .vop_getpages = cd9660_getpages, 908 }; 909 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops); 910 911 /* 912 * Special device vnode ops 913 */ 914 915 struct vop_vector cd9660_fifoops = { 916 .vop_default = &fifo_specops, 917 .vop_access = cd9660_access, 918 .vop_getattr = cd9660_getattr, 919 .vop_inactive = cd9660_inactive, 920 .vop_reclaim = cd9660_reclaim, 921 .vop_setattr = cd9660_setattr, 922 .vop_vptofh = cd9660_vptofh, 923 }; 924 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops); 925