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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 <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_reclen = GENERIC_DIRSIZ(dp); 382 dirent_terminate(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; 484 485 dp = VTOI(vdp); 486 imp = dp->i_mnt; 487 bmask = imp->im_bmask; 488 489 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 490 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 491 /* 492 * XXX 493 * Is it worth trying to figure out the type? 494 */ 495 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 496 DT_UNKNOWN; 497 idp->uio = uio; 498 if (ap->a_ncookies == NULL) { 499 idp->cookies = NULL; 500 } else { 501 /* 502 * Guess the number of cookies needed. 503 */ 504 ncookies = uio->uio_resid / 16; 505 cookies = malloc(ncookies * sizeof(u_long), 506 M_TEMP, M_WAITOK); 507 idp->cookies = cookies; 508 idp->ncookies = ncookies; 509 } 510 idp->eofflag = 1; 511 idp->curroff = uio->uio_offset; 512 idp->uio_off = uio->uio_offset; 513 514 if ((entryoffsetinblock = idp->curroff & bmask) && 515 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 516 free(idp, M_TEMP); 517 return (error); 518 } 519 endsearch = dp->i_size; 520 521 while (idp->curroff < endsearch) { 522 /* 523 * If offset is on a block boundary, 524 * read the next directory block. 525 * Release previous if it exists. 526 */ 527 if ((idp->curroff & bmask) == 0) { 528 if (bp != NULL) 529 brelse(bp); 530 if ((error = 531 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 532 break; 533 entryoffsetinblock = 0; 534 } 535 /* 536 * Get pointer to next entry. 537 */ 538 ep = (struct iso_directory_record *) 539 ((char *)bp->b_data + entryoffsetinblock); 540 541 reclen = isonum_711(ep->length); 542 if (reclen == 0) { 543 /* skip to next block, if any */ 544 idp->curroff = 545 (idp->curroff & ~bmask) + imp->logical_block_size; 546 continue; 547 } 548 549 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 550 error = EINVAL; 551 /* illegal entry, stop */ 552 break; 553 } 554 555 if (entryoffsetinblock + reclen > imp->logical_block_size) { 556 error = EINVAL; 557 /* illegal directory, so stop looking */ 558 break; 559 } 560 561 idp->current.d_namlen = isonum_711(ep->name_len); 562 563 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 564 error = EINVAL; 565 /* illegal entry, stop */ 566 break; 567 } 568 569 if (isonum_711(ep->flags)&2) 570 idp->current.d_fileno = isodirino(ep, imp); 571 else 572 idp->current.d_fileno = dbtob(bp->b_blkno) + 573 entryoffsetinblock; 574 575 idp->curroff += reclen; 576 577 switch (imp->iso_ftype) { 578 case ISO_FTYPE_RRIP: 579 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 580 &idp->current.d_fileno,imp); 581 idp->current.d_namlen = (u_char)namelen; 582 if (idp->current.d_namlen) 583 error = iso_uiodir(idp,&idp->current,idp->curroff); 584 break; 585 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 586 strcpy(idp->current.d_name,".."); 587 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 588 idp->current.d_namlen = 1; 589 error = iso_uiodir(idp,&idp->current,idp->curroff); 590 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 591 idp->current.d_namlen = 2; 592 error = iso_uiodir(idp,&idp->current,idp->curroff); 593 } else { 594 isofntrans(ep->name,idp->current.d_namlen, 595 idp->current.d_name, &namelen, 596 imp->iso_ftype == ISO_FTYPE_9660, 597 isonum_711(ep->flags)&4, 598 imp->joliet_level, 599 imp->im_flags, 600 imp->im_d2l); 601 idp->current.d_namlen = (u_char)namelen; 602 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 603 error = iso_shipdir(idp); 604 else 605 error = iso_uiodir(idp,&idp->current,idp->curroff); 606 } 607 } 608 if (error) 609 break; 610 611 entryoffsetinblock += reclen; 612 } 613 614 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 615 idp->current.d_namlen = 0; 616 error = iso_shipdir(idp); 617 } 618 if (error < 0) 619 error = 0; 620 621 if (ap->a_ncookies != NULL) { 622 if (error) 623 free(cookies, M_TEMP); 624 else { 625 /* 626 * Work out the number of cookies actually used. 627 */ 628 *ap->a_ncookies = ncookies - idp->ncookies; 629 *ap->a_cookies = cookies; 630 } 631 } 632 633 if (bp) 634 brelse (bp); 635 636 uio->uio_offset = idp->uio_off; 637 *ap->a_eofflag = idp->eofflag; 638 639 free(idp, M_TEMP); 640 641 return (error); 642 } 643 644 /* 645 * Return target name of a symbolic link 646 * Shouldn't we get the parent vnode and read the data from there? 647 * This could eventually result in deadlocks in cd9660_lookup. 648 * But otherwise the block read here is in the block buffer two times. 649 */ 650 typedef struct iso_directory_record ISODIR; 651 typedef struct iso_node ISONODE; 652 typedef struct iso_mnt ISOMNT; 653 static int 654 cd9660_readlink(ap) 655 struct vop_readlink_args /* { 656 struct vnode *a_vp; 657 struct uio *a_uio; 658 struct ucred *a_cred; 659 } */ *ap; 660 { 661 ISONODE *ip; 662 ISODIR *dirp; 663 ISOMNT *imp; 664 struct buf *bp; 665 struct uio *uio; 666 u_short symlen; 667 int error; 668 char *symname; 669 670 ip = VTOI(ap->a_vp); 671 imp = ip->i_mnt; 672 uio = ap->a_uio; 673 674 if (imp->iso_ftype != ISO_FTYPE_RRIP) 675 return (EINVAL); 676 677 /* 678 * Get parents directory record block that this inode included. 679 */ 680 error = bread(imp->im_devvp, 681 (ip->i_number >> imp->im_bshift) << 682 (imp->im_bshift - DEV_BSHIFT), 683 imp->logical_block_size, NOCRED, &bp); 684 if (error) { 685 brelse(bp); 686 return (EINVAL); 687 } 688 689 /* 690 * Setup the directory pointer for this inode 691 */ 692 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 693 694 /* 695 * Just make sure, we have a right one.... 696 * 1: Check not cross boundary on block 697 */ 698 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 699 > (unsigned)imp->logical_block_size) { 700 brelse(bp); 701 return (EINVAL); 702 } 703 704 /* 705 * Now get a buffer 706 * Abuse a namei buffer for now. 707 */ 708 if (uio->uio_segflg == UIO_SYSSPACE) 709 symname = uio->uio_iov->iov_base; 710 else 711 symname = uma_zalloc(namei_zone, M_WAITOK); 712 713 /* 714 * Ok, we just gathering a symbolic name in SL record. 715 */ 716 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 717 if (uio->uio_segflg != UIO_SYSSPACE) 718 uma_zfree(namei_zone, symname); 719 brelse(bp); 720 return (EINVAL); 721 } 722 /* 723 * Don't forget before you leave from home ;-) 724 */ 725 brelse(bp); 726 727 /* 728 * return with the symbolic name to caller's. 729 */ 730 if (uio->uio_segflg != UIO_SYSSPACE) { 731 error = uiomove(symname, symlen, uio); 732 uma_zfree(namei_zone, symname); 733 return (error); 734 } 735 uio->uio_resid -= symlen; 736 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 737 uio->uio_iov->iov_len -= symlen; 738 return (0); 739 } 740 741 /* 742 * Calculate the logical to physical mapping if not done already, 743 * then call the device strategy routine. 744 */ 745 static int 746 cd9660_strategy(ap) 747 struct vop_strategy_args /* { 748 struct buf *a_vp; 749 struct buf *a_bp; 750 } */ *ap; 751 { 752 struct buf *bp = ap->a_bp; 753 struct vnode *vp = ap->a_vp; 754 struct iso_node *ip; 755 struct bufobj *bo; 756 757 ip = VTOI(vp); 758 if (vp->v_type == VBLK || vp->v_type == VCHR) 759 panic("cd9660_strategy: spec"); 760 if (bp->b_blkno == bp->b_lblkno) { 761 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 762 (ip->i_mnt->im_bshift - DEV_BSHIFT); 763 } 764 bp->b_iooffset = dbtob(bp->b_blkno); 765 bo = ip->i_mnt->im_bo; 766 BO_STRATEGY(bo, bp); 767 return (0); 768 } 769 770 /* 771 * Return POSIX pathconf information applicable to cd9660 filesystems. 772 */ 773 static int 774 cd9660_pathconf(ap) 775 struct vop_pathconf_args /* { 776 struct vnode *a_vp; 777 int a_name; 778 register_t *a_retval; 779 } */ *ap; 780 { 781 782 switch (ap->a_name) { 783 case _PC_FILESIZEBITS: 784 *ap->a_retval = 32; 785 return (0); 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_SYMLINK_MAX: 796 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 797 *ap->a_retval = MAXPATHLEN; 798 return (0); 799 } 800 return (EINVAL); 801 case _PC_NO_TRUNC: 802 *ap->a_retval = 1; 803 return (0); 804 default: 805 return (vop_stdpathconf(ap)); 806 } 807 /* NOTREACHED */ 808 } 809 810 /* 811 * Vnode pointer to File handle 812 */ 813 static int 814 cd9660_vptofh(ap) 815 struct vop_vptofh_args /* { 816 struct vnode *a_vp; 817 struct fid *a_fhp; 818 } */ *ap; 819 { 820 struct ifid ifh; 821 struct iso_node *ip = VTOI(ap->a_vp); 822 823 ifh.ifid_len = sizeof(struct ifid); 824 825 ifh.ifid_ino = ip->i_number; 826 ifh.ifid_start = ip->iso_start; 827 /* 828 * This intentionally uses sizeof(ifh) in order to not copy stack 829 * garbage on ILP32. 830 */ 831 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 832 833 #ifdef ISOFS_DBG 834 printf("vptofh: ino %d, start %ld\n", 835 ifh.ifid_ino, ifh.ifid_start); 836 #endif 837 838 return (0); 839 } 840 841 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "cd9660 filesystem"); 842 static int use_buf_pager = 0; 843 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 844 &use_buf_pager, 0, 845 "Use buffer pager instead of bmap"); 846 847 static daddr_t 848 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 849 { 850 851 return (lblkno(VTOI(vp)->i_mnt, off)); 852 } 853 854 static int 855 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn) 856 { 857 struct iso_node *ip; 858 859 ip = VTOI(vp); 860 return (blksize(ip->i_mnt, ip, lbn)); 861 } 862 863 static int 864 cd9660_getpages(struct vop_getpages_args *ap) 865 { 866 struct vnode *vp; 867 868 vp = ap->a_vp; 869 if (vp->v_type == VCHR || vp->v_type == VBLK) 870 return (EOPNOTSUPP); 871 872 if (use_buf_pager) 873 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 874 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 875 cd9660_gbp_getblksz)); 876 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 877 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 878 } 879 880 /* 881 * Global vfs data structures for cd9660 882 */ 883 struct vop_vector cd9660_vnodeops = { 884 .vop_default = &default_vnodeops, 885 .vop_open = cd9660_open, 886 .vop_access = cd9660_access, 887 .vop_bmap = cd9660_bmap, 888 .vop_cachedlookup = cd9660_lookup, 889 .vop_getattr = cd9660_getattr, 890 .vop_inactive = cd9660_inactive, 891 .vop_ioctl = cd9660_ioctl, 892 .vop_lookup = vfs_cache_lookup, 893 .vop_pathconf = cd9660_pathconf, 894 .vop_read = cd9660_read, 895 .vop_readdir = cd9660_readdir, 896 .vop_readlink = cd9660_readlink, 897 .vop_reclaim = cd9660_reclaim, 898 .vop_setattr = cd9660_setattr, 899 .vop_strategy = cd9660_strategy, 900 .vop_vptofh = cd9660_vptofh, 901 .vop_getpages = cd9660_getpages, 902 }; 903 904 /* 905 * Special device vnode ops 906 */ 907 908 struct vop_vector cd9660_fifoops = { 909 .vop_default = &fifo_specops, 910 .vop_access = cd9660_access, 911 .vop_getattr = cd9660_getattr, 912 .vop_inactive = cd9660_inactive, 913 .vop_reclaim = cd9660_reclaim, 914 .vop_setattr = cd9660_setattr, 915 .vop_vptofh = cd9660_vptofh, 916 };
Cache object: 33838dec9a9debd4861be0a1505e440f
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