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sys/fs/cd9660/cd9660_vnops.c
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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(struct vop_setattr_args *ap) 87 { 88 struct vnode *vp = ap->a_vp; 89 struct vattr *vap = ap->a_vap; 90 91 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 92 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 93 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 94 return (EROFS); 95 if (vap->va_size != (u_quad_t)VNOVAL) { 96 switch (vp->v_type) { 97 case VDIR: 98 return (EISDIR); 99 case VLNK: 100 case VREG: 101 return (EROFS); 102 case VCHR: 103 case VBLK: 104 case VSOCK: 105 case VFIFO: 106 case VNON: 107 case VBAD: 108 case VMARKER: 109 return (0); 110 } 111 } 112 return (0); 113 } 114 115 /* 116 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 117 * The mode is shifted to select the owner/group/other fields. The 118 * super user is granted all permissions. 119 */ 120 /* ARGSUSED */ 121 static int 122 cd9660_access(struct vop_access_args *ap) 123 { 124 struct vnode *vp = ap->a_vp; 125 struct iso_node *ip = VTOI(vp); 126 accmode_t accmode = ap->a_accmode; 127 128 if (vp->v_type == VCHR || vp->v_type == VBLK) 129 return (EOPNOTSUPP); 130 131 /* 132 * Disallow write attempts unless the file is a socket, 133 * fifo, or a block or character device resident on the 134 * filesystem. 135 */ 136 if (accmode & VWRITE) { 137 switch (vp->v_type) { 138 case VDIR: 139 case VLNK: 140 case VREG: 141 return (EROFS); 142 /* NOT REACHED */ 143 default: 144 break; 145 } 146 } 147 148 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 149 ip->inode.iso_gid, ap->a_accmode, ap->a_cred)); 150 } 151 152 static int 153 cd9660_open(struct vop_open_args *ap) 154 { 155 struct vnode *vp = ap->a_vp; 156 struct iso_node *ip = VTOI(vp); 157 158 if (vp->v_type == VCHR || vp->v_type == VBLK) 159 return (EOPNOTSUPP); 160 161 vnode_create_vobject(vp, ip->i_size, ap->a_td); 162 return (0); 163 } 164 165 static int 166 cd9660_getattr(struct vop_getattr_args *ap) 167 168 { 169 struct vnode *vp = ap->a_vp; 170 struct vattr *vap = ap->a_vap; 171 struct iso_node *ip = VTOI(vp); 172 173 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 174 vap->va_fileid = ip->i_number; 175 176 vap->va_mode = ip->inode.iso_mode; 177 vap->va_nlink = ip->inode.iso_links; 178 vap->va_uid = ip->inode.iso_uid; 179 vap->va_gid = ip->inode.iso_gid; 180 vap->va_atime = ip->inode.iso_atime; 181 vap->va_mtime = ip->inode.iso_mtime; 182 vap->va_ctime = ip->inode.iso_ctime; 183 vap->va_rdev = ip->inode.iso_rdev; 184 185 vap->va_size = (u_quad_t) ip->i_size; 186 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 187 struct vop_readlink_args rdlnk; 188 struct iovec aiov; 189 struct uio auio; 190 char *cp; 191 192 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 193 aiov.iov_base = cp; 194 aiov.iov_len = MAXPATHLEN; 195 auio.uio_iov = &aiov; 196 auio.uio_iovcnt = 1; 197 auio.uio_offset = 0; 198 auio.uio_rw = UIO_READ; 199 auio.uio_segflg = UIO_SYSSPACE; 200 auio.uio_td = curthread; 201 auio.uio_resid = MAXPATHLEN; 202 rdlnk.a_uio = &auio; 203 rdlnk.a_vp = ap->a_vp; 204 rdlnk.a_cred = ap->a_cred; 205 if (cd9660_readlink(&rdlnk) == 0) 206 vap->va_size = MAXPATHLEN - auio.uio_resid; 207 free(cp, M_TEMP); 208 } 209 vap->va_flags = 0; 210 vap->va_gen = 1; 211 vap->va_blocksize = ip->i_mnt->logical_block_size; 212 vap->va_bytes = (u_quad_t) ip->i_size; 213 vap->va_type = vp->v_type; 214 vap->va_filerev = 0; 215 return (0); 216 } 217 218 /* 219 * Vnode op for ioctl. 220 */ 221 static int 222 cd9660_ioctl(struct vop_ioctl_args *ap) 223 { 224 struct vnode *vp; 225 struct iso_node *ip; 226 int error; 227 228 vp = ap->a_vp; 229 vn_lock(vp, LK_SHARED | LK_RETRY); 230 if (VN_IS_DOOMED(vp)) { 231 VOP_UNLOCK(vp); 232 return (EBADF); 233 } 234 if (vp->v_type == VCHR || vp->v_type == VBLK) { 235 VOP_UNLOCK(vp); 236 return (EOPNOTSUPP); 237 } 238 239 ip = VTOI(vp); 240 error = 0; 241 242 switch (ap->a_command) { 243 case FIOGETLBA: 244 *(int *)(ap->a_data) = ip->iso_start; 245 break; 246 default: 247 error = ENOTTY; 248 break; 249 } 250 251 VOP_UNLOCK(vp); 252 return (error); 253 } 254 255 /* 256 * Vnode op for reading. 257 */ 258 static int 259 cd9660_read(struct vop_read_args *ap) 260 { 261 struct vnode *vp = ap->a_vp; 262 struct uio *uio = ap->a_uio; 263 struct iso_node *ip = VTOI(vp); 264 struct iso_mnt *imp; 265 struct buf *bp; 266 daddr_t lbn, rablock; 267 off_t diff; 268 int rasize, error = 0; 269 int seqcount; 270 long size, n, on; 271 272 if (vp->v_type == VCHR || vp->v_type == VBLK) 273 return (EOPNOTSUPP); 274 275 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 276 277 if (uio->uio_resid == 0) 278 return (0); 279 if (uio->uio_offset < 0) 280 return (EINVAL); 281 imp = ip->i_mnt; 282 do { 283 lbn = lblkno(imp, uio->uio_offset); 284 on = blkoff(imp, uio->uio_offset); 285 n = MIN(imp->logical_block_size - on, uio->uio_resid); 286 diff = (off_t)ip->i_size - uio->uio_offset; 287 if (diff <= 0) 288 return (0); 289 if (diff < n) 290 n = diff; 291 size = blksize(imp, ip, lbn); 292 rablock = lbn + 1; 293 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 294 if (lblktosize(imp, rablock) < ip->i_size) 295 error = cluster_read(vp, (off_t)ip->i_size, 296 lbn, size, NOCRED, uio->uio_resid, 297 (ap->a_ioflag >> 16), 0, &bp); 298 else 299 error = bread(vp, lbn, size, NOCRED, &bp); 300 } else { 301 if (seqcount > 1 && 302 lblktosize(imp, rablock) < ip->i_size) { 303 rasize = blksize(imp, ip, rablock); 304 error = breadn(vp, lbn, size, &rablock, 305 &rasize, 1, NOCRED, &bp); 306 } else 307 error = bread(vp, lbn, size, NOCRED, &bp); 308 } 309 if (error != 0) 310 return (error); 311 n = MIN(n, size - bp->b_resid); 312 313 error = uiomove(bp->b_data + on, (int)n, uio); 314 brelse(bp); 315 } while (error == 0 && uio->uio_resid > 0 && n != 0); 316 return (error); 317 } 318 319 /* 320 * Structure for reading directories 321 */ 322 struct isoreaddir { 323 struct dirent saveent; 324 struct dirent assocent; 325 struct dirent current; 326 off_t saveoff; 327 off_t assocoff; 328 off_t curroff; 329 struct uio *uio; 330 off_t uio_off; 331 int eofflag; 332 uint64_t *cookies; 333 int ncookies; 334 }; 335 336 static int 337 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 338 { 339 int error; 340 341 dp->d_reclen = GENERIC_DIRSIZ(dp); 342 dirent_terminate(dp); 343 344 if (idp->uio->uio_resid < dp->d_reclen) { 345 idp->eofflag = 0; 346 return (-1); 347 } 348 349 if (idp->cookies) { 350 if (idp->ncookies <= 0) { 351 idp->eofflag = 0; 352 return (-1); 353 } 354 355 *idp->cookies++ = off; 356 --idp->ncookies; 357 } 358 359 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 360 return (error); 361 idp->uio_off = off; 362 return (0); 363 } 364 365 static int 366 iso_shipdir(struct isoreaddir *idp) 367 { 368 struct dirent *dp; 369 int cl, sl, assoc; 370 int error; 371 char *cname, *sname; 372 373 cl = idp->current.d_namlen; 374 cname = idp->current.d_name; 375 assoc = (cl > 1) && (*cname == ASSOCCHAR); 376 if (assoc) { 377 cl--; 378 cname++; 379 } 380 381 dp = &idp->saveent; 382 sname = dp->d_name; 383 if (!(sl = dp->d_namlen)) { 384 dp = &idp->assocent; 385 sname = dp->d_name + 1; 386 sl = dp->d_namlen - 1; 387 } 388 if (sl > 0) { 389 if (sl != cl 390 || bcmp(sname,cname,sl)) { 391 if (idp->assocent.d_namlen) { 392 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 393 return (error); 394 idp->assocent.d_namlen = 0; 395 } 396 if (idp->saveent.d_namlen) { 397 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 398 return (error); 399 idp->saveent.d_namlen = 0; 400 } 401 } 402 } 403 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 404 if (assoc) { 405 idp->assocoff = idp->curroff; 406 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 407 } else { 408 idp->saveoff = idp->curroff; 409 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 410 } 411 return (0); 412 } 413 414 /* 415 * Vnode op for readdir 416 */ 417 static int 418 cd9660_readdir(struct vop_readdir_args *ap) 419 { 420 struct uio *uio = ap->a_uio; 421 struct isoreaddir *idp; 422 struct vnode *vdp = ap->a_vp; 423 struct iso_node *dp; 424 struct iso_mnt *imp; 425 struct buf *bp = NULL; 426 struct iso_directory_record *ep; 427 int entryoffsetinblock; 428 doff_t endsearch; 429 u_long bmask; 430 int error = 0; 431 int reclen; 432 u_short namelen; 433 u_int ncookies = 0; 434 uint64_t *cookies = NULL; 435 cd_ino_t ino; 436 437 dp = VTOI(vdp); 438 imp = dp->i_mnt; 439 bmask = imp->im_bmask; 440 441 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 442 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 443 /* 444 * XXX 445 * Is it worth trying to figure out the type? 446 */ 447 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 448 DT_UNKNOWN; 449 idp->uio = uio; 450 if (ap->a_ncookies == NULL) { 451 idp->cookies = NULL; 452 } else { 453 /* 454 * Guess the number of cookies needed. 455 */ 456 ncookies = uio->uio_resid / 16; 457 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 458 idp->cookies = cookies; 459 idp->ncookies = ncookies; 460 } 461 idp->eofflag = 1; 462 idp->curroff = uio->uio_offset; 463 idp->uio_off = uio->uio_offset; 464 465 if ((entryoffsetinblock = idp->curroff & bmask) && 466 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 467 free(idp, M_TEMP); 468 return (error); 469 } 470 endsearch = dp->i_size; 471 472 while (idp->curroff < endsearch) { 473 /* 474 * If offset is on a block boundary, 475 * read the next directory block. 476 * Release previous if it exists. 477 */ 478 if ((idp->curroff & bmask) == 0) { 479 if (bp != NULL) 480 brelse(bp); 481 if ((error = 482 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 483 break; 484 entryoffsetinblock = 0; 485 } 486 /* 487 * Get pointer to next entry. 488 */ 489 ep = (struct iso_directory_record *) 490 ((char *)bp->b_data + entryoffsetinblock); 491 492 reclen = isonum_711(ep->length); 493 if (reclen == 0) { 494 /* skip to next block, if any */ 495 idp->curroff = 496 (idp->curroff & ~bmask) + imp->logical_block_size; 497 continue; 498 } 499 500 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 501 error = EINVAL; 502 /* illegal entry, stop */ 503 break; 504 } 505 506 if (entryoffsetinblock + reclen > imp->logical_block_size) { 507 error = EINVAL; 508 /* illegal directory, so stop looking */ 509 break; 510 } 511 512 idp->current.d_namlen = isonum_711(ep->name_len); 513 514 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 515 error = EINVAL; 516 /* illegal entry, stop */ 517 break; 518 } 519 520 if (isonum_711(ep->flags)&2) 521 idp->current.d_fileno = isodirino(ep, imp); 522 else 523 idp->current.d_fileno = dbtob(bp->b_blkno) + 524 entryoffsetinblock; 525 526 idp->curroff += reclen; 527 /* NOTE: d_off is the offset of *next* entry. */ 528 idp->current.d_off = idp->curroff; 529 530 switch (imp->iso_ftype) { 531 case ISO_FTYPE_RRIP: 532 ino = idp->current.d_fileno; 533 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 534 &ino, imp); 535 idp->current.d_fileno = ino; 536 idp->current.d_namlen = (u_char)namelen; 537 if (idp->current.d_namlen) 538 error = iso_uiodir(idp,&idp->current,idp->curroff); 539 break; 540 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 541 strcpy(idp->current.d_name,".."); 542 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 543 idp->current.d_namlen = 1; 544 error = iso_uiodir(idp,&idp->current,idp->curroff); 545 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 546 idp->current.d_namlen = 2; 547 error = iso_uiodir(idp,&idp->current,idp->curroff); 548 } else { 549 isofntrans(ep->name,idp->current.d_namlen, 550 idp->current.d_name, &namelen, 551 imp->iso_ftype == ISO_FTYPE_9660, 552 isonum_711(ep->flags)&4, 553 imp->joliet_level, 554 imp->im_flags, 555 imp->im_d2l); 556 idp->current.d_namlen = (u_char)namelen; 557 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 558 error = iso_shipdir(idp); 559 else 560 error = iso_uiodir(idp,&idp->current,idp->curroff); 561 } 562 } 563 if (error) 564 break; 565 566 entryoffsetinblock += reclen; 567 } 568 569 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 570 idp->current.d_namlen = 0; 571 error = iso_shipdir(idp); 572 } 573 if (error < 0) 574 error = 0; 575 576 if (ap->a_ncookies != NULL) { 577 if (error) 578 free(cookies, M_TEMP); 579 else { 580 /* 581 * Work out the number of cookies actually used. 582 */ 583 *ap->a_ncookies = ncookies - idp->ncookies; 584 *ap->a_cookies = cookies; 585 } 586 } 587 588 if (bp) 589 brelse (bp); 590 591 uio->uio_offset = idp->uio_off; 592 *ap->a_eofflag = idp->eofflag; 593 594 free(idp, M_TEMP); 595 596 return (error); 597 } 598 599 /* 600 * Return target name of a symbolic link 601 * Shouldn't we get the parent vnode and read the data from there? 602 * This could eventually result in deadlocks in cd9660_lookup. 603 * But otherwise the block read here is in the block buffer two times. 604 */ 605 typedef struct iso_directory_record ISODIR; 606 typedef struct iso_node ISONODE; 607 typedef struct iso_mnt ISOMNT; 608 static int 609 cd9660_readlink(struct vop_readlink_args *ap) 610 { 611 ISONODE *ip; 612 ISODIR *dirp; 613 ISOMNT *imp; 614 struct buf *bp; 615 struct uio *uio; 616 u_short symlen; 617 int error; 618 char *symname; 619 620 ip = VTOI(ap->a_vp); 621 imp = ip->i_mnt; 622 uio = ap->a_uio; 623 624 if (imp->iso_ftype != ISO_FTYPE_RRIP) 625 return (EINVAL); 626 627 /* 628 * Get parents directory record block that this inode included. 629 */ 630 error = bread(imp->im_devvp, 631 (ip->i_number >> imp->im_bshift) << 632 (imp->im_bshift - DEV_BSHIFT), 633 imp->logical_block_size, NOCRED, &bp); 634 if (error) { 635 return (EINVAL); 636 } 637 638 /* 639 * Setup the directory pointer for this inode 640 */ 641 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 642 643 /* 644 * Just make sure, we have a right one.... 645 * 1: Check not cross boundary on block 646 */ 647 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 648 > (unsigned)imp->logical_block_size) { 649 brelse(bp); 650 return (EINVAL); 651 } 652 653 /* 654 * Now get a buffer 655 * Abuse a namei buffer for now. 656 */ 657 if (uio->uio_segflg == UIO_SYSSPACE) 658 symname = uio->uio_iov->iov_base; 659 else 660 symname = uma_zalloc(namei_zone, M_WAITOK); 661 662 /* 663 * Ok, we just gathering a symbolic name in SL record. 664 */ 665 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 666 if (uio->uio_segflg != UIO_SYSSPACE) 667 uma_zfree(namei_zone, symname); 668 brelse(bp); 669 return (EINVAL); 670 } 671 /* 672 * Don't forget before you leave from home ;-) 673 */ 674 brelse(bp); 675 676 /* 677 * return with the symbolic name to caller's. 678 */ 679 if (uio->uio_segflg != UIO_SYSSPACE) { 680 error = uiomove(symname, symlen, uio); 681 uma_zfree(namei_zone, symname); 682 return (error); 683 } 684 uio->uio_resid -= symlen; 685 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 686 uio->uio_iov->iov_len -= symlen; 687 return (0); 688 } 689 690 /* 691 * Calculate the logical to physical mapping if not done already, 692 * then call the device strategy routine. 693 */ 694 static int 695 cd9660_strategy(struct vop_strategy_args *ap) 696 { 697 struct buf *bp = ap->a_bp; 698 struct vnode *vp = ap->a_vp; 699 struct iso_node *ip; 700 struct bufobj *bo; 701 702 ip = VTOI(vp); 703 if (vp->v_type == VBLK || vp->v_type == VCHR) 704 panic("cd9660_strategy: spec"); 705 if (bp->b_blkno == bp->b_lblkno) { 706 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 707 (ip->i_mnt->im_bshift - DEV_BSHIFT); 708 } 709 bp->b_iooffset = dbtob(bp->b_blkno); 710 bo = ip->i_mnt->im_bo; 711 BO_STRATEGY(bo, bp); 712 return (0); 713 } 714 715 /* 716 * Return POSIX pathconf information applicable to cd9660 filesystems. 717 */ 718 static int 719 cd9660_pathconf(struct vop_pathconf_args *ap) 720 { 721 722 switch (ap->a_name) { 723 case _PC_FILESIZEBITS: 724 *ap->a_retval = 32; 725 return (0); 726 case _PC_LINK_MAX: 727 *ap->a_retval = 1; 728 return (0); 729 case _PC_NAME_MAX: 730 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 731 *ap->a_retval = NAME_MAX; 732 else 733 *ap->a_retval = 37; 734 return (0); 735 case _PC_SYMLINK_MAX: 736 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 737 *ap->a_retval = MAXPATHLEN; 738 return (0); 739 } 740 return (EINVAL); 741 case _PC_NO_TRUNC: 742 *ap->a_retval = 1; 743 return (0); 744 default: 745 return (vop_stdpathconf(ap)); 746 } 747 /* NOTREACHED */ 748 } 749 750 /* 751 * Vnode pointer to File handle 752 */ 753 static int 754 cd9660_vptofh(struct vop_vptofh_args *ap) 755 { 756 struct ifid ifh; 757 struct iso_node *ip = VTOI(ap->a_vp); 758 759 ifh.ifid_len = sizeof(struct ifid); 760 761 ifh.ifid_ino = ip->i_number; 762 ifh.ifid_start = ip->iso_start; 763 /* 764 * This intentionally uses sizeof(ifh) in order to not copy stack 765 * garbage on ILP32. 766 */ 767 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 768 769 #ifdef ISOFS_DBG 770 printf("vptofh: ino %jd, start %ld\n", 771 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 772 #endif 773 774 return (0); 775 } 776 777 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 778 "cd9660 filesystem"); 779 static int use_buf_pager = 1; 780 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 781 &use_buf_pager, 0, 782 "Use buffer pager instead of bmap"); 783 784 static daddr_t 785 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 786 { 787 788 return (lblkno(VTOI(vp)->i_mnt, off)); 789 } 790 791 static int 792 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz) 793 { 794 struct iso_node *ip; 795 796 ip = VTOI(vp); 797 *sz = blksize(ip->i_mnt, ip, lbn); 798 return (0); 799 } 800 801 static int 802 cd9660_getpages(struct vop_getpages_args *ap) 803 { 804 struct vnode *vp; 805 806 vp = ap->a_vp; 807 if (vp->v_type == VCHR || vp->v_type == VBLK) 808 return (EOPNOTSUPP); 809 810 if (use_buf_pager) 811 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 812 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 813 cd9660_gbp_getblksz)); 814 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 815 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 816 } 817 818 /* 819 * Global vfs data structures for cd9660 820 */ 821 struct vop_vector cd9660_vnodeops = { 822 .vop_default = &default_vnodeops, 823 .vop_open = cd9660_open, 824 .vop_access = cd9660_access, 825 .vop_bmap = cd9660_bmap, 826 .vop_cachedlookup = cd9660_lookup, 827 .vop_getattr = cd9660_getattr, 828 .vop_inactive = cd9660_inactive, 829 .vop_ioctl = cd9660_ioctl, 830 .vop_lookup = vfs_cache_lookup, 831 .vop_pathconf = cd9660_pathconf, 832 .vop_read = cd9660_read, 833 .vop_readdir = cd9660_readdir, 834 .vop_readlink = cd9660_readlink, 835 .vop_reclaim = cd9660_reclaim, 836 .vop_setattr = cd9660_setattr, 837 .vop_strategy = cd9660_strategy, 838 .vop_vptofh = cd9660_vptofh, 839 .vop_getpages = cd9660_getpages, 840 }; 841 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops); 842 843 /* 844 * Special device vnode ops 845 */ 846 847 struct vop_vector cd9660_fifoops = { 848 .vop_default = &fifo_specops, 849 .vop_access = cd9660_access, 850 .vop_getattr = cd9660_getattr, 851 .vop_inactive = cd9660_inactive, 852 .vop_reclaim = cd9660_reclaim, 853 .vop_setattr = cd9660_setattr, 854 .vop_vptofh = cd9660_vptofh, 855 }; 856 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops);
Cache object: 31c6c0338b2f5659232e4813a81251f7
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