Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/fs/cd9660/cd9660_vnops.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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: releng/12.0/sys/fs/cd9660/cd9660_vnops.c 341085 2018-11-27 17:58:25Z markj $"); 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, NULL)); 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 } 183 184 185 static int 186 cd9660_getattr(ap) 187 struct vop_getattr_args /* { 188 struct vnode *a_vp; 189 struct vattr *a_vap; 190 struct ucred *a_cred; 191 } */ *ap; 192 193 { 194 struct vnode *vp = ap->a_vp; 195 struct vattr *vap = ap->a_vap; 196 struct iso_node *ip = VTOI(vp); 197 198 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 199 vap->va_fileid = ip->i_number; 200 201 vap->va_mode = ip->inode.iso_mode; 202 vap->va_nlink = ip->inode.iso_links; 203 vap->va_uid = ip->inode.iso_uid; 204 vap->va_gid = ip->inode.iso_gid; 205 vap->va_atime = ip->inode.iso_atime; 206 vap->va_mtime = ip->inode.iso_mtime; 207 vap->va_ctime = ip->inode.iso_ctime; 208 vap->va_rdev = ip->inode.iso_rdev; 209 210 vap->va_size = (u_quad_t) ip->i_size; 211 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 212 struct vop_readlink_args rdlnk; 213 struct iovec aiov; 214 struct uio auio; 215 char *cp; 216 217 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 218 aiov.iov_base = cp; 219 aiov.iov_len = MAXPATHLEN; 220 auio.uio_iov = &aiov; 221 auio.uio_iovcnt = 1; 222 auio.uio_offset = 0; 223 auio.uio_rw = UIO_READ; 224 auio.uio_segflg = UIO_SYSSPACE; 225 auio.uio_td = curthread; 226 auio.uio_resid = MAXPATHLEN; 227 rdlnk.a_uio = &auio; 228 rdlnk.a_vp = ap->a_vp; 229 rdlnk.a_cred = ap->a_cred; 230 if (cd9660_readlink(&rdlnk) == 0) 231 vap->va_size = MAXPATHLEN - auio.uio_resid; 232 free(cp, M_TEMP); 233 } 234 vap->va_flags = 0; 235 vap->va_gen = 1; 236 vap->va_blocksize = ip->i_mnt->logical_block_size; 237 vap->va_bytes = (u_quad_t) ip->i_size; 238 vap->va_type = vp->v_type; 239 vap->va_filerev = 0; 240 return (0); 241 } 242 243 /* 244 * Vnode op for ioctl. 245 */ 246 static int 247 cd9660_ioctl(ap) 248 struct vop_ioctl_args /* { 249 struct vnode *a_vp; 250 u_long a_command; 251 caddr_t a_data; 252 int a_fflag; 253 struct ucred *a_cred; 254 struct thread *a_td; 255 } */ *ap; 256 { 257 struct vnode *vp; 258 struct iso_node *ip; 259 int error; 260 261 vp = ap->a_vp; 262 vn_lock(vp, LK_SHARED | LK_RETRY); 263 if (vp->v_iflag & VI_DOOMED) { 264 VOP_UNLOCK(vp, 0); 265 return (EBADF); 266 } 267 if (vp->v_type == VCHR || vp->v_type == VBLK) { 268 VOP_UNLOCK(vp, 0); 269 return (EOPNOTSUPP); 270 } 271 272 ip = VTOI(vp); 273 error = 0; 274 275 switch (ap->a_command) { 276 case FIOGETLBA: 277 *(int *)(ap->a_data) = ip->iso_start; 278 break; 279 default: 280 error = ENOTTY; 281 break; 282 } 283 284 VOP_UNLOCK(vp, 0); 285 return (error); 286 } 287 288 /* 289 * Vnode op for reading. 290 */ 291 static int 292 cd9660_read(ap) 293 struct vop_read_args /* { 294 struct vnode *a_vp; 295 struct uio *a_uio; 296 int a_ioflag; 297 struct ucred *a_cred; 298 } */ *ap; 299 { 300 struct vnode *vp = ap->a_vp; 301 struct uio *uio = ap->a_uio; 302 struct iso_node *ip = VTOI(vp); 303 struct iso_mnt *imp; 304 struct buf *bp; 305 daddr_t lbn, rablock; 306 off_t diff; 307 int rasize, error = 0; 308 int seqcount; 309 long size, n, on; 310 311 if (vp->v_type == VCHR || vp->v_type == VBLK) 312 return (EOPNOTSUPP); 313 314 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 315 316 if (uio->uio_resid == 0) 317 return (0); 318 if (uio->uio_offset < 0) 319 return (EINVAL); 320 imp = ip->i_mnt; 321 do { 322 lbn = lblkno(imp, uio->uio_offset); 323 on = blkoff(imp, uio->uio_offset); 324 n = MIN(imp->logical_block_size - on, uio->uio_resid); 325 diff = (off_t)ip->i_size - uio->uio_offset; 326 if (diff <= 0) 327 return (0); 328 if (diff < n) 329 n = diff; 330 size = blksize(imp, ip, lbn); 331 rablock = lbn + 1; 332 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 333 if (lblktosize(imp, rablock) < ip->i_size) 334 error = cluster_read(vp, (off_t)ip->i_size, 335 lbn, size, NOCRED, uio->uio_resid, 336 (ap->a_ioflag >> 16), 0, &bp); 337 else 338 error = bread(vp, lbn, size, NOCRED, &bp); 339 } else { 340 if (seqcount > 1 && 341 lblktosize(imp, rablock) < ip->i_size) { 342 rasize = blksize(imp, ip, rablock); 343 error = breadn(vp, lbn, size, &rablock, 344 &rasize, 1, NOCRED, &bp); 345 } else 346 error = bread(vp, lbn, size, NOCRED, &bp); 347 } 348 if (error != 0) 349 return (error); 350 n = MIN(n, size - bp->b_resid); 351 352 error = uiomove(bp->b_data + on, (int)n, uio); 353 brelse(bp); 354 } while (error == 0 && uio->uio_resid > 0 && n != 0); 355 return (error); 356 } 357 358 /* 359 * Structure for reading directories 360 */ 361 struct isoreaddir { 362 struct dirent saveent; 363 struct dirent assocent; 364 struct dirent current; 365 off_t saveoff; 366 off_t assocoff; 367 off_t curroff; 368 struct uio *uio; 369 off_t uio_off; 370 int eofflag; 371 u_long *cookies; 372 int ncookies; 373 }; 374 375 static int 376 iso_uiodir(idp,dp,off) 377 struct isoreaddir *idp; 378 struct dirent *dp; 379 off_t off; 380 { 381 int error; 382 383 dp->d_reclen = GENERIC_DIRSIZ(dp); 384 dirent_terminate(dp); 385 386 if (idp->uio->uio_resid < dp->d_reclen) { 387 idp->eofflag = 0; 388 return (-1); 389 } 390 391 if (idp->cookies) { 392 if (idp->ncookies <= 0) { 393 idp->eofflag = 0; 394 return (-1); 395 } 396 397 *idp->cookies++ = off; 398 --idp->ncookies; 399 } 400 401 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 402 return (error); 403 idp->uio_off = off; 404 return (0); 405 } 406 407 static int 408 iso_shipdir(idp) 409 struct isoreaddir *idp; 410 { 411 struct dirent *dp; 412 int cl, sl, assoc; 413 int error; 414 char *cname, *sname; 415 416 cl = idp->current.d_namlen; 417 cname = idp->current.d_name; 418 assoc = (cl > 1) && (*cname == ASSOCCHAR); 419 if (assoc) { 420 cl--; 421 cname++; 422 } 423 424 dp = &idp->saveent; 425 sname = dp->d_name; 426 if (!(sl = dp->d_namlen)) { 427 dp = &idp->assocent; 428 sname = dp->d_name + 1; 429 sl = dp->d_namlen - 1; 430 } 431 if (sl > 0) { 432 if (sl != cl 433 || bcmp(sname,cname,sl)) { 434 if (idp->assocent.d_namlen) { 435 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 436 return (error); 437 idp->assocent.d_namlen = 0; 438 } 439 if (idp->saveent.d_namlen) { 440 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 441 return (error); 442 idp->saveent.d_namlen = 0; 443 } 444 } 445 } 446 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 447 if (assoc) { 448 idp->assocoff = idp->curroff; 449 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen); 450 } else { 451 idp->saveoff = idp->curroff; 452 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen); 453 } 454 return (0); 455 } 456 457 /* 458 * Vnode op for readdir 459 */ 460 static int 461 cd9660_readdir(ap) 462 struct vop_readdir_args /* { 463 struct vnode *a_vp; 464 struct uio *a_uio; 465 struct ucred *a_cred; 466 int *a_eofflag; 467 int *a_ncookies; 468 u_long **a_cookies; 469 } */ *ap; 470 { 471 struct uio *uio = ap->a_uio; 472 struct isoreaddir *idp; 473 struct vnode *vdp = ap->a_vp; 474 struct iso_node *dp; 475 struct iso_mnt *imp; 476 struct buf *bp = NULL; 477 struct iso_directory_record *ep; 478 int entryoffsetinblock; 479 doff_t endsearch; 480 u_long bmask; 481 int error = 0; 482 int reclen; 483 u_short namelen; 484 u_int ncookies = 0; 485 u_long *cookies = NULL; 486 cd_ino_t ino; 487 488 dp = VTOI(vdp); 489 imp = dp->i_mnt; 490 bmask = imp->im_bmask; 491 492 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 493 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 494 /* 495 * XXX 496 * Is it worth trying to figure out the type? 497 */ 498 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 499 DT_UNKNOWN; 500 idp->uio = uio; 501 if (ap->a_ncookies == NULL) { 502 idp->cookies = NULL; 503 } else { 504 /* 505 * Guess the number of cookies needed. 506 */ 507 ncookies = uio->uio_resid / 16; 508 cookies = malloc(ncookies * sizeof(u_long), 509 M_TEMP, M_WAITOK); 510 idp->cookies = cookies; 511 idp->ncookies = ncookies; 512 } 513 idp->eofflag = 1; 514 idp->curroff = uio->uio_offset; 515 idp->uio_off = uio->uio_offset; 516 517 if ((entryoffsetinblock = idp->curroff & bmask) && 518 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 519 free(idp, M_TEMP); 520 return (error); 521 } 522 endsearch = dp->i_size; 523 524 while (idp->curroff < endsearch) { 525 /* 526 * If offset is on a block boundary, 527 * read the next directory block. 528 * Release previous if it exists. 529 */ 530 if ((idp->curroff & bmask) == 0) { 531 if (bp != NULL) 532 brelse(bp); 533 if ((error = 534 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 535 break; 536 entryoffsetinblock = 0; 537 } 538 /* 539 * Get pointer to next entry. 540 */ 541 ep = (struct iso_directory_record *) 542 ((char *)bp->b_data + entryoffsetinblock); 543 544 reclen = isonum_711(ep->length); 545 if (reclen == 0) { 546 /* skip to next block, if any */ 547 idp->curroff = 548 (idp->curroff & ~bmask) + imp->logical_block_size; 549 continue; 550 } 551 552 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 553 error = EINVAL; 554 /* illegal entry, stop */ 555 break; 556 } 557 558 if (entryoffsetinblock + reclen > imp->logical_block_size) { 559 error = EINVAL; 560 /* illegal directory, so stop looking */ 561 break; 562 } 563 564 idp->current.d_namlen = isonum_711(ep->name_len); 565 566 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 567 error = EINVAL; 568 /* illegal entry, stop */ 569 break; 570 } 571 572 if (isonum_711(ep->flags)&2) 573 idp->current.d_fileno = isodirino(ep, imp); 574 else 575 idp->current.d_fileno = dbtob(bp->b_blkno) + 576 entryoffsetinblock; 577 578 idp->curroff += reclen; 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 brelse(bp); 691 return (EINVAL); 692 } 693 694 /* 695 * Setup the directory pointer for this inode 696 */ 697 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 698 699 /* 700 * Just make sure, we have a right one.... 701 * 1: Check not cross boundary on block 702 */ 703 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 704 > (unsigned)imp->logical_block_size) { 705 brelse(bp); 706 return (EINVAL); 707 } 708 709 /* 710 * Now get a buffer 711 * Abuse a namei buffer for now. 712 */ 713 if (uio->uio_segflg == UIO_SYSSPACE) 714 symname = uio->uio_iov->iov_base; 715 else 716 symname = uma_zalloc(namei_zone, M_WAITOK); 717 718 /* 719 * Ok, we just gathering a symbolic name in SL record. 720 */ 721 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 722 if (uio->uio_segflg != UIO_SYSSPACE) 723 uma_zfree(namei_zone, symname); 724 brelse(bp); 725 return (EINVAL); 726 } 727 /* 728 * Don't forget before you leave from home ;-) 729 */ 730 brelse(bp); 731 732 /* 733 * return with the symbolic name to caller's. 734 */ 735 if (uio->uio_segflg != UIO_SYSSPACE) { 736 error = uiomove(symname, symlen, uio); 737 uma_zfree(namei_zone, symname); 738 return (error); 739 } 740 uio->uio_resid -= symlen; 741 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 742 uio->uio_iov->iov_len -= symlen; 743 return (0); 744 } 745 746 /* 747 * Calculate the logical to physical mapping if not done already, 748 * then call the device strategy routine. 749 */ 750 static int 751 cd9660_strategy(ap) 752 struct vop_strategy_args /* { 753 struct buf *a_vp; 754 struct buf *a_bp; 755 } */ *ap; 756 { 757 struct buf *bp = ap->a_bp; 758 struct vnode *vp = ap->a_vp; 759 struct iso_node *ip; 760 struct bufobj *bo; 761 762 ip = VTOI(vp); 763 if (vp->v_type == VBLK || vp->v_type == VCHR) 764 panic("cd9660_strategy: spec"); 765 if (bp->b_blkno == bp->b_lblkno) { 766 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 767 (ip->i_mnt->im_bshift - DEV_BSHIFT); 768 } 769 bp->b_iooffset = dbtob(bp->b_blkno); 770 bo = ip->i_mnt->im_bo; 771 BO_STRATEGY(bo, bp); 772 return (0); 773 } 774 775 /* 776 * Return POSIX pathconf information applicable to cd9660 filesystems. 777 */ 778 static int 779 cd9660_pathconf(ap) 780 struct vop_pathconf_args /* { 781 struct vnode *a_vp; 782 int a_name; 783 register_t *a_retval; 784 } */ *ap; 785 { 786 787 switch (ap->a_name) { 788 case _PC_FILESIZEBITS: 789 *ap->a_retval = 32; 790 return (0); 791 case _PC_LINK_MAX: 792 *ap->a_retval = 1; 793 return (0); 794 case _PC_NAME_MAX: 795 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 796 *ap->a_retval = NAME_MAX; 797 else 798 *ap->a_retval = 37; 799 return (0); 800 case _PC_SYMLINK_MAX: 801 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 802 *ap->a_retval = MAXPATHLEN; 803 return (0); 804 } 805 return (EINVAL); 806 case _PC_NO_TRUNC: 807 *ap->a_retval = 1; 808 return (0); 809 default: 810 return (vop_stdpathconf(ap)); 811 } 812 /* NOTREACHED */ 813 } 814 815 /* 816 * Vnode pointer to File handle 817 */ 818 static int 819 cd9660_vptofh(ap) 820 struct vop_vptofh_args /* { 821 struct vnode *a_vp; 822 struct fid *a_fhp; 823 } */ *ap; 824 { 825 struct ifid ifh; 826 struct iso_node *ip = VTOI(ap->a_vp); 827 828 ifh.ifid_len = sizeof(struct ifid); 829 830 ifh.ifid_ino = ip->i_number; 831 ifh.ifid_start = ip->iso_start; 832 /* 833 * This intentionally uses sizeof(ifh) in order to not copy stack 834 * garbage on ILP32. 835 */ 836 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 837 838 #ifdef ISOFS_DBG 839 printf("vptofh: ino %jd, start %ld\n", 840 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 841 #endif 842 843 return (0); 844 } 845 846 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "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) 861 { 862 struct iso_node *ip; 863 864 ip = VTOI(vp); 865 return (blksize(ip->i_mnt, ip, lbn)); 866 } 867 868 static int 869 cd9660_getpages(struct vop_getpages_args *ap) 870 { 871 struct vnode *vp; 872 873 vp = ap->a_vp; 874 if (vp->v_type == VCHR || vp->v_type == VBLK) 875 return (EOPNOTSUPP); 876 877 if (use_buf_pager) 878 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 879 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 880 cd9660_gbp_getblksz)); 881 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 882 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 883 } 884 885 /* 886 * Global vfs data structures for cd9660 887 */ 888 struct vop_vector cd9660_vnodeops = { 889 .vop_default = &default_vnodeops, 890 .vop_open = cd9660_open, 891 .vop_access = cd9660_access, 892 .vop_bmap = cd9660_bmap, 893 .vop_cachedlookup = cd9660_lookup, 894 .vop_getattr = cd9660_getattr, 895 .vop_inactive = cd9660_inactive, 896 .vop_ioctl = cd9660_ioctl, 897 .vop_lookup = vfs_cache_lookup, 898 .vop_pathconf = cd9660_pathconf, 899 .vop_read = cd9660_read, 900 .vop_readdir = cd9660_readdir, 901 .vop_readlink = cd9660_readlink, 902 .vop_reclaim = cd9660_reclaim, 903 .vop_setattr = cd9660_setattr, 904 .vop_strategy = cd9660_strategy, 905 .vop_vptofh = cd9660_vptofh, 906 .vop_getpages = cd9660_getpages, 907 }; 908 909 /* 910 * Special device vnode ops 911 */ 912 913 struct vop_vector cd9660_fifoops = { 914 .vop_default = &fifo_specops, 915 .vop_access = cd9660_access, 916 .vop_getattr = cd9660_getattr, 917 .vop_inactive = cd9660_inactive, 918 .vop_reclaim = cd9660_reclaim, 919 .vop_setattr = cd9660_setattr, 920 .vop_vptofh = cd9660_vptofh, 921 };
Cache object: 080d6093e2f3c85df557b410f7491bda
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]