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sys/fs/cd9660/cd9660_vnops.c
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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 * 4. 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 <fs/fifofs/fifo.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/unistd.h> 54 #include <sys/filio.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 79 /* 80 * Setattr call. Only allowed for block and character special devices. 81 */ 82 static int 83 cd9660_setattr(ap) 84 struct vop_setattr_args /* { 85 struct vnodeop_desc *a_desc; 86 struct vnode *a_vp; 87 struct vattr *a_vap; 88 struct ucred *a_cred; 89 struct thread *a_td; 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 int a_mode; 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 mode_t mode = ap->a_mode; 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 (mode & 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_mode, 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 int a_fdidx; 170 } */ *ap; 171 { 172 struct iso_node *ip = VTOI(ap->a_vp); 173 174 vnode_create_vobject(ap->a_vp, ip->i_size, ap->a_td); 175 return 0; 176 } 177 178 179 static int 180 cd9660_getattr(ap) 181 struct vop_getattr_args /* { 182 struct vnode *a_vp; 183 struct vattr *a_vap; 184 struct ucred *a_cred; 185 struct thread *a_td; 186 } */ *ap; 187 188 { 189 struct vnode *vp = ap->a_vp; 190 struct vattr *vap = ap->a_vap; 191 struct iso_node *ip = VTOI(vp); 192 193 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 194 vap->va_fileid = ip->i_number; 195 196 vap->va_mode = ip->inode.iso_mode; 197 vap->va_nlink = ip->inode.iso_links; 198 vap->va_uid = ip->inode.iso_uid; 199 vap->va_gid = ip->inode.iso_gid; 200 vap->va_atime = ip->inode.iso_atime; 201 vap->va_mtime = ip->inode.iso_mtime; 202 vap->va_ctime = ip->inode.iso_ctime; 203 vap->va_rdev = ip->inode.iso_rdev; 204 205 vap->va_size = (u_quad_t) ip->i_size; 206 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 207 struct vop_readlink_args rdlnk; 208 struct iovec aiov; 209 struct uio auio; 210 char *cp; 211 212 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 213 aiov.iov_base = cp; 214 aiov.iov_len = MAXPATHLEN; 215 auio.uio_iov = &aiov; 216 auio.uio_iovcnt = 1; 217 auio.uio_offset = 0; 218 auio.uio_rw = UIO_READ; 219 auio.uio_segflg = UIO_SYSSPACE; 220 auio.uio_td = ap->a_td; 221 auio.uio_resid = MAXPATHLEN; 222 rdlnk.a_uio = &auio; 223 rdlnk.a_vp = ap->a_vp; 224 rdlnk.a_cred = ap->a_cred; 225 if (cd9660_readlink(&rdlnk) == 0) 226 vap->va_size = MAXPATHLEN - auio.uio_resid; 227 FREE(cp, M_TEMP); 228 } 229 vap->va_flags = 0; 230 vap->va_gen = 1; 231 vap->va_blocksize = ip->i_mnt->logical_block_size; 232 vap->va_bytes = (u_quad_t) ip->i_size; 233 vap->va_type = vp->v_type; 234 vap->va_filerev = 0; 235 return (0); 236 } 237 238 /* 239 * Vnode op for ioctl. 240 */ 241 static int 242 cd9660_ioctl(ap) 243 struct vop_ioctl_args /* { 244 struct vnode *a_vp; 245 u_long a_command; 246 caddr_t a_data; 247 int a_fflag; 248 struct ucred *a_cred; 249 struct thread *a_td; 250 } */ *ap; 251 { 252 struct vnode *vp = ap->a_vp; 253 struct iso_node *ip = VTOI(vp); 254 255 if (vp->v_type == VCHR || vp->v_type == VBLK) 256 return (EOPNOTSUPP); 257 258 switch (ap->a_command) { 259 260 case FIOGETLBA: 261 *(int *)(ap->a_data) = ip->iso_start; 262 return 0; 263 default: 264 return (ENOTTY); 265 } 266 } 267 268 /* 269 * Vnode op for reading. 270 */ 271 static int 272 cd9660_read(ap) 273 struct vop_read_args /* { 274 struct vnode *a_vp; 275 struct uio *a_uio; 276 int a_ioflag; 277 struct ucred *a_cred; 278 } */ *ap; 279 { 280 struct vnode *vp = ap->a_vp; 281 struct uio *uio = ap->a_uio; 282 struct iso_node *ip = VTOI(vp); 283 struct iso_mnt *imp; 284 struct buf *bp; 285 daddr_t lbn, rablock; 286 off_t diff; 287 int rasize, error = 0; 288 int seqcount; 289 long size, n, on; 290 291 if (vp->v_type == VCHR || vp->v_type == VBLK) 292 return (EOPNOTSUPP); 293 294 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 295 296 if (uio->uio_resid == 0) 297 return (0); 298 if (uio->uio_offset < 0) 299 return (EINVAL); 300 ip->i_flag |= IN_ACCESS; 301 imp = ip->i_mnt; 302 do { 303 lbn = lblkno(imp, uio->uio_offset); 304 on = blkoff(imp, uio->uio_offset); 305 n = min((u_int)(imp->logical_block_size - on), 306 uio->uio_resid); 307 diff = (off_t)ip->i_size - uio->uio_offset; 308 if (diff <= 0) 309 return (0); 310 if (diff < n) 311 n = diff; 312 size = blksize(imp, ip, lbn); 313 rablock = lbn + 1; 314 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 315 if (lblktosize(imp, rablock) < ip->i_size) 316 error = cluster_read(vp, (off_t)ip->i_size, 317 lbn, size, NOCRED, uio->uio_resid, 318 (ap->a_ioflag >> 16), &bp); 319 else 320 error = bread(vp, lbn, size, NOCRED, &bp); 321 } else { 322 if (seqcount > 1 && 323 lblktosize(imp, rablock) < ip->i_size) { 324 rasize = blksize(imp, ip, rablock); 325 error = breadn(vp, lbn, size, &rablock, 326 &rasize, 1, NOCRED, &bp); 327 } else 328 error = bread(vp, lbn, size, NOCRED, &bp); 329 } 330 n = min(n, size - bp->b_resid); 331 if (error) { 332 brelse(bp); 333 return (error); 334 } 335 336 error = uiomove(bp->b_data + on, (int)n, uio); 337 brelse(bp); 338 } while (error == 0 && uio->uio_resid > 0 && n != 0); 339 return (error); 340 } 341 342 /* 343 * Structure for reading directories 344 */ 345 struct isoreaddir { 346 struct dirent saveent; 347 struct dirent assocent; 348 struct dirent current; 349 off_t saveoff; 350 off_t assocoff; 351 off_t curroff; 352 struct uio *uio; 353 off_t uio_off; 354 int eofflag; 355 u_long *cookies; 356 int ncookies; 357 }; 358 359 static int 360 iso_uiodir(idp,dp,off) 361 struct isoreaddir *idp; 362 struct dirent *dp; 363 off_t off; 364 { 365 int error; 366 367 dp->d_name[dp->d_namlen] = 0; 368 dp->d_reclen = GENERIC_DIRSIZ(dp); 369 370 if (idp->uio->uio_resid < dp->d_reclen) { 371 idp->eofflag = 0; 372 return (-1); 373 } 374 375 if (idp->cookies) { 376 if (idp->ncookies <= 0) { 377 idp->eofflag = 0; 378 return (-1); 379 } 380 381 *idp->cookies++ = off; 382 --idp->ncookies; 383 } 384 385 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 386 return (error); 387 idp->uio_off = off; 388 return (0); 389 } 390 391 static int 392 iso_shipdir(idp) 393 struct isoreaddir *idp; 394 { 395 struct dirent *dp; 396 int cl, sl, assoc; 397 int error; 398 char *cname, *sname; 399 400 cl = idp->current.d_namlen; 401 cname = idp->current.d_name; 402 assoc = (cl > 1) && (*cname == ASSOCCHAR); 403 if (assoc) { 404 cl--; 405 cname++; 406 } 407 408 dp = &idp->saveent; 409 sname = dp->d_name; 410 if (!(sl = dp->d_namlen)) { 411 dp = &idp->assocent; 412 sname = dp->d_name + 1; 413 sl = dp->d_namlen - 1; 414 } 415 if (sl > 0) { 416 if (sl != cl 417 || bcmp(sname,cname,sl)) { 418 if (idp->assocent.d_namlen) { 419 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 420 return (error); 421 idp->assocent.d_namlen = 0; 422 } 423 if (idp->saveent.d_namlen) { 424 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 425 return (error); 426 idp->saveent.d_namlen = 0; 427 } 428 } 429 } 430 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 431 if (assoc) { 432 idp->assocoff = idp->curroff; 433 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 434 } else { 435 idp->saveoff = idp->curroff; 436 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 437 } 438 return (0); 439 } 440 441 /* 442 * Vnode op for readdir 443 */ 444 static int 445 cd9660_readdir(ap) 446 struct vop_readdir_args /* { 447 struct vnode *a_vp; 448 struct uio *a_uio; 449 struct ucred *a_cred; 450 int *a_eofflag; 451 int *a_ncookies; 452 u_long **a_cookies; 453 } */ *ap; 454 { 455 struct uio *uio = ap->a_uio; 456 struct isoreaddir *idp; 457 struct vnode *vdp = ap->a_vp; 458 struct iso_node *dp; 459 struct iso_mnt *imp; 460 struct buf *bp = NULL; 461 struct iso_directory_record *ep; 462 int entryoffsetinblock; 463 doff_t endsearch; 464 u_long bmask; 465 int error = 0; 466 int reclen; 467 u_short namelen; 468 int ncookies = 0; 469 u_long *cookies = NULL; 470 471 dp = VTOI(vdp); 472 imp = dp->i_mnt; 473 bmask = imp->im_bmask; 474 475 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 476 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 477 /* 478 * XXX 479 * Is it worth trying to figure out the type? 480 */ 481 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 482 DT_UNKNOWN; 483 idp->uio = uio; 484 if (ap->a_ncookies == NULL) { 485 idp->cookies = NULL; 486 } else { 487 /* 488 * Guess the number of cookies needed. 489 */ 490 ncookies = uio->uio_resid / 16; 491 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 492 M_TEMP, M_WAITOK); 493 idp->cookies = cookies; 494 idp->ncookies = ncookies; 495 } 496 idp->eofflag = 1; 497 idp->curroff = uio->uio_offset; 498 499 if ((entryoffsetinblock = idp->curroff & bmask) && 500 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 501 FREE(idp, M_TEMP); 502 return (error); 503 } 504 endsearch = dp->i_size; 505 506 while (idp->curroff < endsearch) { 507 /* 508 * If offset is on a block boundary, 509 * read the next directory block. 510 * Release previous if it exists. 511 */ 512 if ((idp->curroff & bmask) == 0) { 513 if (bp != NULL) 514 brelse(bp); 515 if ((error = 516 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 517 break; 518 entryoffsetinblock = 0; 519 } 520 /* 521 * Get pointer to next entry. 522 */ 523 ep = (struct iso_directory_record *) 524 ((char *)bp->b_data + entryoffsetinblock); 525 526 reclen = isonum_711(ep->length); 527 if (reclen == 0) { 528 /* skip to next block, if any */ 529 idp->curroff = 530 (idp->curroff & ~bmask) + imp->logical_block_size; 531 continue; 532 } 533 534 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 535 error = EINVAL; 536 /* illegal entry, stop */ 537 break; 538 } 539 540 if (entryoffsetinblock + reclen > imp->logical_block_size) { 541 error = EINVAL; 542 /* illegal directory, so stop looking */ 543 break; 544 } 545 546 idp->current.d_namlen = isonum_711(ep->name_len); 547 548 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 549 error = EINVAL; 550 /* illegal entry, stop */ 551 break; 552 } 553 554 if (isonum_711(ep->flags)&2) 555 idp->current.d_fileno = isodirino(ep, imp); 556 else 557 idp->current.d_fileno = dbtob(bp->b_blkno) + 558 entryoffsetinblock; 559 560 idp->curroff += reclen; 561 562 switch (imp->iso_ftype) { 563 case ISO_FTYPE_RRIP: 564 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 565 &idp->current.d_fileno,imp); 566 idp->current.d_namlen = (u_char)namelen; 567 if (idp->current.d_namlen) 568 error = iso_uiodir(idp,&idp->current,idp->curroff); 569 break; 570 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 571 strcpy(idp->current.d_name,".."); 572 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 573 idp->current.d_namlen = 1; 574 error = iso_uiodir(idp,&idp->current,idp->curroff); 575 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 576 idp->current.d_namlen = 2; 577 error = iso_uiodir(idp,&idp->current,idp->curroff); 578 } else { 579 isofntrans(ep->name,idp->current.d_namlen, 580 idp->current.d_name, &namelen, 581 imp->iso_ftype == ISO_FTYPE_9660, 582 isonum_711(ep->flags)&4, 583 imp->joliet_level, 584 imp->im_flags, 585 imp->im_d2l); 586 idp->current.d_namlen = (u_char)namelen; 587 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 588 error = iso_shipdir(idp); 589 else 590 error = iso_uiodir(idp,&idp->current,idp->curroff); 591 } 592 } 593 if (error) 594 break; 595 596 entryoffsetinblock += reclen; 597 } 598 599 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 600 idp->current.d_namlen = 0; 601 error = iso_shipdir(idp); 602 } 603 if (error < 0) 604 error = 0; 605 606 if (ap->a_ncookies != NULL) { 607 if (error) 608 free(cookies, M_TEMP); 609 else { 610 /* 611 * Work out the number of cookies actually used. 612 */ 613 *ap->a_ncookies = ncookies - idp->ncookies; 614 *ap->a_cookies = cookies; 615 } 616 } 617 618 if (bp) 619 brelse (bp); 620 621 uio->uio_offset = idp->uio_off; 622 *ap->a_eofflag = idp->eofflag; 623 624 FREE(idp, M_TEMP); 625 626 return (error); 627 } 628 629 /* 630 * Return target name of a symbolic link 631 * Shouldn't we get the parent vnode and read the data from there? 632 * This could eventually result in deadlocks in cd9660_lookup. 633 * But otherwise the block read here is in the block buffer two times. 634 */ 635 typedef struct iso_directory_record ISODIR; 636 typedef struct iso_node ISONODE; 637 typedef struct iso_mnt ISOMNT; 638 static int 639 cd9660_readlink(ap) 640 struct vop_readlink_args /* { 641 struct vnode *a_vp; 642 struct uio *a_uio; 643 struct ucred *a_cred; 644 } */ *ap; 645 { 646 ISONODE *ip; 647 ISODIR *dirp; 648 ISOMNT *imp; 649 struct buf *bp; 650 struct uio *uio; 651 u_short symlen; 652 int error; 653 char *symname; 654 655 ip = VTOI(ap->a_vp); 656 imp = ip->i_mnt; 657 uio = ap->a_uio; 658 659 if (imp->iso_ftype != ISO_FTYPE_RRIP) 660 return (EINVAL); 661 662 /* 663 * Get parents directory record block that this inode included. 664 */ 665 error = bread(imp->im_devvp, 666 (ip->i_number >> imp->im_bshift) << 667 (imp->im_bshift - DEV_BSHIFT), 668 imp->logical_block_size, NOCRED, &bp); 669 if (error) { 670 brelse(bp); 671 return (EINVAL); 672 } 673 674 /* 675 * Setup the directory pointer for this inode 676 */ 677 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 678 679 /* 680 * Just make sure, we have a right one.... 681 * 1: Check not cross boundary on block 682 */ 683 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 684 > (unsigned)imp->logical_block_size) { 685 brelse(bp); 686 return (EINVAL); 687 } 688 689 /* 690 * Now get a buffer 691 * Abuse a namei buffer for now. 692 */ 693 if (uio->uio_segflg == UIO_SYSSPACE) 694 symname = uio->uio_iov->iov_base; 695 else 696 symname = uma_zalloc(namei_zone, M_WAITOK); 697 698 /* 699 * Ok, we just gathering a symbolic name in SL record. 700 */ 701 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 702 if (uio->uio_segflg != UIO_SYSSPACE) 703 uma_zfree(namei_zone, symname); 704 brelse(bp); 705 return (EINVAL); 706 } 707 /* 708 * Don't forget before you leave from home ;-) 709 */ 710 brelse(bp); 711 712 /* 713 * return with the symbolic name to caller's. 714 */ 715 if (uio->uio_segflg != UIO_SYSSPACE) { 716 error = uiomove(symname, symlen, uio); 717 uma_zfree(namei_zone, symname); 718 return (error); 719 } 720 uio->uio_resid -= symlen; 721 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 722 uio->uio_iov->iov_len -= symlen; 723 return (0); 724 } 725 726 /* 727 * Calculate the logical to physical mapping if not done already, 728 * then call the device strategy routine. 729 */ 730 static int 731 cd9660_strategy(ap) 732 struct vop_strategy_args /* { 733 struct buf *a_vp; 734 struct buf *a_bp; 735 } */ *ap; 736 { 737 struct buf *bp = ap->a_bp; 738 struct vnode *vp = ap->a_vp; 739 struct iso_node *ip; 740 struct bufobj *bo; 741 742 ip = VTOI(vp); 743 if (vp->v_type == VBLK || vp->v_type == VCHR) 744 panic("cd9660_strategy: spec"); 745 if (bp->b_blkno == bp->b_lblkno) { 746 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 747 (ip->i_mnt->im_bshift - DEV_BSHIFT); 748 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */ 749 clrbuf(bp); 750 } 751 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */ 752 bufdone(bp); 753 return (0); 754 } 755 bp->b_iooffset = dbtob(bp->b_blkno); 756 bo = ip->i_mnt->im_bo; 757 BO_STRATEGY(bo, bp); 758 return (0); 759 } 760 761 /* 762 * Return POSIX pathconf information applicable to cd9660 filesystems. 763 */ 764 static int 765 cd9660_pathconf(ap) 766 struct vop_pathconf_args /* { 767 struct vnode *a_vp; 768 int a_name; 769 register_t *a_retval; 770 } */ *ap; 771 { 772 773 switch (ap->a_name) { 774 case _PC_LINK_MAX: 775 *ap->a_retval = 1; 776 return (0); 777 case _PC_NAME_MAX: 778 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 779 *ap->a_retval = NAME_MAX; 780 else 781 *ap->a_retval = 37; 782 return (0); 783 case _PC_PATH_MAX: 784 *ap->a_retval = PATH_MAX; 785 return (0); 786 case _PC_PIPE_BUF: 787 *ap->a_retval = PIPE_BUF; 788 return (0); 789 case _PC_CHOWN_RESTRICTED: 790 *ap->a_retval = 1; 791 return (0); 792 case _PC_NO_TRUNC: 793 *ap->a_retval = 1; 794 return (0); 795 default: 796 return (EINVAL); 797 } 798 /* NOTREACHED */ 799 } 800 801 /* 802 * Vnode pointer to File handle 803 */ 804 static int 805 cd9660_vptofh(ap) 806 struct vop_vptofh_args /* { 807 struct vnode *a_vp; 808 struct fid *a_fhp; 809 } */ *ap; 810 { 811 struct iso_node *ip = VTOI(ap->a_vp); 812 struct ifid *ifhp; 813 814 ifhp = (struct ifid *)ap->a_fhp; 815 ifhp->ifid_len = sizeof(struct ifid); 816 817 ifhp->ifid_ino = ip->i_number; 818 ifhp->ifid_start = ip->iso_start; 819 820 #ifdef ISOFS_DBG 821 printf("vptofh: ino %d, start %ld\n", 822 ifhp->ifid_ino,ifhp->ifid_start); 823 #endif 824 return 0; 825 } 826 827 /* 828 * Global vfs data structures for cd9660 829 */ 830 struct vop_vector cd9660_vnodeops = { 831 .vop_default = &default_vnodeops, 832 .vop_open = cd9660_open, 833 .vop_access = cd9660_access, 834 .vop_bmap = cd9660_bmap, 835 .vop_cachedlookup = cd9660_lookup, 836 .vop_getattr = cd9660_getattr, 837 .vop_inactive = cd9660_inactive, 838 .vop_ioctl = cd9660_ioctl, 839 .vop_lookup = vfs_cache_lookup, 840 .vop_pathconf = cd9660_pathconf, 841 .vop_read = cd9660_read, 842 .vop_readdir = cd9660_readdir, 843 .vop_readlink = cd9660_readlink, 844 .vop_reclaim = cd9660_reclaim, 845 .vop_setattr = cd9660_setattr, 846 .vop_strategy = cd9660_strategy, 847 .vop_vptofh = cd9660_vptofh, 848 }; 849 850 /* 851 * Special device vnode ops 852 */ 853 854 struct vop_vector cd9660_fifoops = { 855 .vop_default = &fifo_specops, 856 .vop_access = cd9660_access, 857 .vop_getattr = cd9660_getattr, 858 .vop_inactive = cd9660_inactive, 859 .vop_reclaim = cd9660_reclaim, 860 .vop_setattr = cd9660_setattr, 861 .vop_vptofh = cd9660_vptofh, 862 };
Cache object: ab2728616ece0f33e5c89f5611f1aff2
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