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 * 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 } */ *ap; 90 { 91 struct vnode *vp = ap->a_vp; 92 struct vattr *vap = ap->a_vap; 93 94 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 95 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 96 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 97 return (EROFS); 98 if (vap->va_size != (u_quad_t)VNOVAL) { 99 switch (vp->v_type) { 100 case VDIR: 101 return (EISDIR); 102 case VLNK: 103 case VREG: 104 return (EROFS); 105 case VCHR: 106 case VBLK: 107 case VSOCK: 108 case VFIFO: 109 case VNON: 110 case VBAD: 111 case VMARKER: 112 return (0); 113 } 114 } 115 return (0); 116 } 117 118 /* 119 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 120 * The mode is shifted to select the owner/group/other fields. The 121 * super user is granted all permissions. 122 */ 123 /* ARGSUSED */ 124 static int 125 cd9660_access(ap) 126 struct vop_access_args /* { 127 struct vnode *a_vp; 128 accmode_t a_accmode; 129 struct ucred *a_cred; 130 struct thread *a_td; 131 } */ *ap; 132 { 133 struct vnode *vp = ap->a_vp; 134 struct iso_node *ip = VTOI(vp); 135 accmode_t accmode = ap->a_accmode; 136 137 if (vp->v_type == VCHR || vp->v_type == VBLK) 138 return (EOPNOTSUPP); 139 140 /* 141 * Disallow write attempts unless the file is a socket, 142 * fifo, or a block or character device resident on the 143 * filesystem. 144 */ 145 if (accmode & VWRITE) { 146 switch (vp->v_type) { 147 case VDIR: 148 case VLNK: 149 case VREG: 150 return (EROFS); 151 /* NOT REACHED */ 152 default: 153 break; 154 } 155 } 156 157 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid, 158 ip->inode.iso_gid, ap->a_accmode, ap->a_cred, NULL)); 159 } 160 161 static int 162 cd9660_open(ap) 163 struct vop_open_args /* { 164 struct vnode *a_vp; 165 int a_mode; 166 struct ucred *a_cred; 167 struct thread *a_td; 168 struct file *a_fp; 169 } */ *ap; 170 { 171 struct vnode *vp = ap->a_vp; 172 struct iso_node *ip = VTOI(vp); 173 174 if (vp->v_type == VCHR || vp->v_type == VBLK) 175 return (EOPNOTSUPP); 176 177 vnode_create_vobject(vp, ip->i_size, ap->a_td); 178 return (0); 179 } 180 181 182 static int 183 cd9660_getattr(ap) 184 struct vop_getattr_args /* { 185 struct vnode *a_vp; 186 struct vattr *a_vap; 187 struct ucred *a_cred; 188 } */ *ap; 189 190 { 191 struct vnode *vp = ap->a_vp; 192 struct vattr *vap = ap->a_vap; 193 struct iso_node *ip = VTOI(vp); 194 195 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 196 vap->va_fileid = ip->i_number; 197 198 vap->va_mode = ip->inode.iso_mode; 199 vap->va_nlink = ip->inode.iso_links; 200 vap->va_uid = ip->inode.iso_uid; 201 vap->va_gid = ip->inode.iso_gid; 202 vap->va_atime = ip->inode.iso_atime; 203 vap->va_mtime = ip->inode.iso_mtime; 204 vap->va_ctime = ip->inode.iso_ctime; 205 vap->va_rdev = ip->inode.iso_rdev; 206 207 vap->va_size = (u_quad_t) ip->i_size; 208 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 209 struct vop_readlink_args rdlnk; 210 struct iovec aiov; 211 struct uio auio; 212 char *cp; 213 214 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 215 aiov.iov_base = cp; 216 aiov.iov_len = MAXPATHLEN; 217 auio.uio_iov = &aiov; 218 auio.uio_iovcnt = 1; 219 auio.uio_offset = 0; 220 auio.uio_rw = UIO_READ; 221 auio.uio_segflg = UIO_SYSSPACE; 222 auio.uio_td = curthread; 223 auio.uio_resid = MAXPATHLEN; 224 rdlnk.a_uio = &auio; 225 rdlnk.a_vp = ap->a_vp; 226 rdlnk.a_cred = ap->a_cred; 227 if (cd9660_readlink(&rdlnk) == 0) 228 vap->va_size = MAXPATHLEN - auio.uio_resid; 229 free(cp, M_TEMP); 230 } 231 vap->va_flags = 0; 232 vap->va_gen = 1; 233 vap->va_blocksize = ip->i_mnt->logical_block_size; 234 vap->va_bytes = (u_quad_t) ip->i_size; 235 vap->va_type = vp->v_type; 236 vap->va_filerev = 0; 237 return (0); 238 } 239 240 /* 241 * Vnode op for ioctl. 242 */ 243 static int 244 cd9660_ioctl(ap) 245 struct vop_ioctl_args /* { 246 struct vnode *a_vp; 247 u_long a_command; 248 caddr_t a_data; 249 int a_fflag; 250 struct ucred *a_cred; 251 struct thread *a_td; 252 } */ *ap; 253 { 254 struct vnode *vp; 255 struct iso_node *ip; 256 int error; 257 258 vp = ap->a_vp; 259 vn_lock(vp, LK_SHARED | LK_RETRY); 260 if (vp->v_iflag & VI_DOOMED) { 261 VOP_UNLOCK(vp, 0); 262 return (EBADF); 263 } 264 if (vp->v_type == VCHR || vp->v_type == VBLK) { 265 VOP_UNLOCK(vp, 0); 266 return (EOPNOTSUPP); 267 } 268 269 ip = VTOI(vp); 270 error = 0; 271 272 switch (ap->a_command) { 273 case FIOGETLBA: 274 *(int *)(ap->a_data) = ip->iso_start; 275 break; 276 default: 277 error = ENOTTY; 278 break; 279 } 280 281 VOP_UNLOCK(vp, 0); 282 return (error); 283 } 284 285 /* 286 * Vnode op for reading. 287 */ 288 static int 289 cd9660_read(ap) 290 struct vop_read_args /* { 291 struct vnode *a_vp; 292 struct uio *a_uio; 293 int a_ioflag; 294 struct ucred *a_cred; 295 } */ *ap; 296 { 297 struct vnode *vp = ap->a_vp; 298 struct uio *uio = ap->a_uio; 299 struct iso_node *ip = VTOI(vp); 300 struct iso_mnt *imp; 301 struct buf *bp; 302 daddr_t lbn, rablock; 303 off_t diff; 304 int rasize, error = 0; 305 int seqcount; 306 long size, n, on; 307 308 if (vp->v_type == VCHR || vp->v_type == VBLK) 309 return (EOPNOTSUPP); 310 311 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 312 313 if (uio->uio_resid == 0) 314 return (0); 315 if (uio->uio_offset < 0) 316 return (EINVAL); 317 imp = ip->i_mnt; 318 do { 319 lbn = lblkno(imp, uio->uio_offset); 320 on = blkoff(imp, uio->uio_offset); 321 n = MIN(imp->logical_block_size - on, uio->uio_resid); 322 diff = (off_t)ip->i_size - uio->uio_offset; 323 if (diff <= 0) 324 return (0); 325 if (diff < n) 326 n = diff; 327 size = blksize(imp, ip, lbn); 328 rablock = lbn + 1; 329 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 330 if (lblktosize(imp, rablock) < ip->i_size) 331 error = cluster_read(vp, (off_t)ip->i_size, 332 lbn, size, NOCRED, uio->uio_resid, 333 (ap->a_ioflag >> 16), &bp); 334 else 335 error = bread(vp, lbn, size, NOCRED, &bp); 336 } else { 337 if (seqcount > 1 && 338 lblktosize(imp, rablock) < ip->i_size) { 339 rasize = blksize(imp, ip, rablock); 340 error = breadn(vp, lbn, size, &rablock, 341 &rasize, 1, NOCRED, &bp); 342 } else 343 error = bread(vp, lbn, size, NOCRED, &bp); 344 } 345 n = MIN(n, size - bp->b_resid); 346 if (error) { 347 brelse(bp); 348 return (error); 349 } 350 351 error = uiomove(bp->b_data + on, (int)n, uio); 352 brelse(bp); 353 } while (error == 0 && uio->uio_resid > 0 && n != 0); 354 return (error); 355 } 356 357 /* 358 * Structure for reading directories 359 */ 360 struct isoreaddir { 361 struct dirent saveent; 362 struct dirent assocent; 363 struct dirent current; 364 off_t saveoff; 365 off_t assocoff; 366 off_t curroff; 367 struct uio *uio; 368 off_t uio_off; 369 int eofflag; 370 u_long *cookies; 371 int ncookies; 372 }; 373 374 static int 375 iso_uiodir(idp,dp,off) 376 struct isoreaddir *idp; 377 struct dirent *dp; 378 off_t off; 379 { 380 int error; 381 382 dp->d_name[dp->d_namlen] = 0; 383 dp->d_reclen = GENERIC_DIRSIZ(dp); 384 385 if (idp->uio->uio_resid < dp->d_reclen) { 386 idp->eofflag = 0; 387 return (-1); 388 } 389 390 if (idp->cookies) { 391 if (idp->ncookies <= 0) { 392 idp->eofflag = 0; 393 return (-1); 394 } 395 396 *idp->cookies++ = off; 397 --idp->ncookies; 398 } 399 400 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 401 return (error); 402 idp->uio_off = off; 403 return (0); 404 } 405 406 static int 407 iso_shipdir(idp) 408 struct isoreaddir *idp; 409 { 410 struct dirent *dp; 411 int cl, sl, assoc; 412 int error; 413 char *cname, *sname; 414 415 cl = idp->current.d_namlen; 416 cname = idp->current.d_name; 417 assoc = (cl > 1) && (*cname == ASSOCCHAR); 418 if (assoc) { 419 cl--; 420 cname++; 421 } 422 423 dp = &idp->saveent; 424 sname = dp->d_name; 425 if (!(sl = dp->d_namlen)) { 426 dp = &idp->assocent; 427 sname = dp->d_name + 1; 428 sl = dp->d_namlen - 1; 429 } 430 if (sl > 0) { 431 if (sl != cl 432 || bcmp(sname,cname,sl)) { 433 if (idp->assocent.d_namlen) { 434 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 435 return (error); 436 idp->assocent.d_namlen = 0; 437 } 438 if (idp->saveent.d_namlen) { 439 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 440 return (error); 441 idp->saveent.d_namlen = 0; 442 } 443 } 444 } 445 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 446 if (assoc) { 447 idp->assocoff = idp->curroff; 448 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 449 } else { 450 idp->saveoff = idp->curroff; 451 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 452 } 453 return (0); 454 } 455 456 /* 457 * Vnode op for readdir 458 */ 459 static int 460 cd9660_readdir(ap) 461 struct vop_readdir_args /* { 462 struct vnode *a_vp; 463 struct uio *a_uio; 464 struct ucred *a_cred; 465 int *a_eofflag; 466 int *a_ncookies; 467 u_long **a_cookies; 468 } */ *ap; 469 { 470 struct uio *uio = ap->a_uio; 471 struct isoreaddir *idp; 472 struct vnode *vdp = ap->a_vp; 473 struct iso_node *dp; 474 struct iso_mnt *imp; 475 struct buf *bp = NULL; 476 struct iso_directory_record *ep; 477 int entryoffsetinblock; 478 doff_t endsearch; 479 u_long bmask; 480 int error = 0; 481 int reclen; 482 u_short namelen; 483 int ncookies = 0; 484 u_long *cookies = NULL; 485 486 dp = VTOI(vdp); 487 imp = dp->i_mnt; 488 bmask = imp->im_bmask; 489 490 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK); 491 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 492 /* 493 * XXX 494 * Is it worth trying to figure out the type? 495 */ 496 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 497 DT_UNKNOWN; 498 idp->uio = uio; 499 if (ap->a_ncookies == NULL) { 500 idp->cookies = NULL; 501 } else { 502 /* 503 * Guess the number of cookies needed. 504 */ 505 ncookies = uio->uio_resid / 16; 506 cookies = malloc(ncookies * sizeof(u_long), 507 M_TEMP, M_WAITOK); 508 idp->cookies = cookies; 509 idp->ncookies = ncookies; 510 } 511 idp->eofflag = 1; 512 idp->curroff = uio->uio_offset; 513 idp->uio_off = uio->uio_offset; 514 515 if ((entryoffsetinblock = idp->curroff & bmask) && 516 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 517 free(idp, M_TEMP); 518 return (error); 519 } 520 endsearch = dp->i_size; 521 522 while (idp->curroff < endsearch) { 523 /* 524 * If offset is on a block boundary, 525 * read the next directory block. 526 * Release previous if it exists. 527 */ 528 if ((idp->curroff & bmask) == 0) { 529 if (bp != NULL) 530 brelse(bp); 531 if ((error = 532 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 533 break; 534 entryoffsetinblock = 0; 535 } 536 /* 537 * Get pointer to next entry. 538 */ 539 ep = (struct iso_directory_record *) 540 ((char *)bp->b_data + entryoffsetinblock); 541 542 reclen = isonum_711(ep->length); 543 if (reclen == 0) { 544 /* skip to next block, if any */ 545 idp->curroff = 546 (idp->curroff & ~bmask) + imp->logical_block_size; 547 continue; 548 } 549 550 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 551 error = EINVAL; 552 /* illegal entry, stop */ 553 break; 554 } 555 556 if (entryoffsetinblock + reclen > imp->logical_block_size) { 557 error = EINVAL; 558 /* illegal directory, so stop looking */ 559 break; 560 } 561 562 idp->current.d_namlen = isonum_711(ep->name_len); 563 564 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 565 error = EINVAL; 566 /* illegal entry, stop */ 567 break; 568 } 569 570 if (isonum_711(ep->flags)&2) 571 idp->current.d_fileno = isodirino(ep, imp); 572 else 573 idp->current.d_fileno = dbtob(bp->b_blkno) + 574 entryoffsetinblock; 575 576 idp->curroff += reclen; 577 578 switch (imp->iso_ftype) { 579 case ISO_FTYPE_RRIP: 580 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 581 &idp->current.d_fileno,imp); 582 idp->current.d_namlen = (u_char)namelen; 583 if (idp->current.d_namlen) 584 error = iso_uiodir(idp,&idp->current,idp->curroff); 585 break; 586 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 587 strcpy(idp->current.d_name,".."); 588 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 589 idp->current.d_namlen = 1; 590 error = iso_uiodir(idp,&idp->current,idp->curroff); 591 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 592 idp->current.d_namlen = 2; 593 error = iso_uiodir(idp,&idp->current,idp->curroff); 594 } else { 595 isofntrans(ep->name,idp->current.d_namlen, 596 idp->current.d_name, &namelen, 597 imp->iso_ftype == ISO_FTYPE_9660, 598 isonum_711(ep->flags)&4, 599 imp->joliet_level, 600 imp->im_flags, 601 imp->im_d2l); 602 idp->current.d_namlen = (u_char)namelen; 603 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 604 error = iso_shipdir(idp); 605 else 606 error = iso_uiodir(idp,&idp->current,idp->curroff); 607 } 608 } 609 if (error) 610 break; 611 612 entryoffsetinblock += reclen; 613 } 614 615 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 616 idp->current.d_namlen = 0; 617 error = iso_shipdir(idp); 618 } 619 if (error < 0) 620 error = 0; 621 622 if (ap->a_ncookies != NULL) { 623 if (error) 624 free(cookies, M_TEMP); 625 else { 626 /* 627 * Work out the number of cookies actually used. 628 */ 629 *ap->a_ncookies = ncookies - idp->ncookies; 630 *ap->a_cookies = cookies; 631 } 632 } 633 634 if (bp) 635 brelse (bp); 636 637 uio->uio_offset = idp->uio_off; 638 *ap->a_eofflag = idp->eofflag; 639 640 free(idp, M_TEMP); 641 642 return (error); 643 } 644 645 /* 646 * Return target name of a symbolic link 647 * Shouldn't we get the parent vnode and read the data from there? 648 * This could eventually result in deadlocks in cd9660_lookup. 649 * But otherwise the block read here is in the block buffer two times. 650 */ 651 typedef struct iso_directory_record ISODIR; 652 typedef struct iso_node ISONODE; 653 typedef struct iso_mnt ISOMNT; 654 static int 655 cd9660_readlink(ap) 656 struct vop_readlink_args /* { 657 struct vnode *a_vp; 658 struct uio *a_uio; 659 struct ucred *a_cred; 660 } */ *ap; 661 { 662 ISONODE *ip; 663 ISODIR *dirp; 664 ISOMNT *imp; 665 struct buf *bp; 666 struct uio *uio; 667 u_short symlen; 668 int error; 669 char *symname; 670 671 ip = VTOI(ap->a_vp); 672 imp = ip->i_mnt; 673 uio = ap->a_uio; 674 675 if (imp->iso_ftype != ISO_FTYPE_RRIP) 676 return (EINVAL); 677 678 /* 679 * Get parents directory record block that this inode included. 680 */ 681 error = bread(imp->im_devvp, 682 (ip->i_number >> imp->im_bshift) << 683 (imp->im_bshift - DEV_BSHIFT), 684 imp->logical_block_size, NOCRED, &bp); 685 if (error) { 686 brelse(bp); 687 return (EINVAL); 688 } 689 690 /* 691 * Setup the directory pointer for this inode 692 */ 693 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 694 695 /* 696 * Just make sure, we have a right one.... 697 * 1: Check not cross boundary on block 698 */ 699 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 700 > (unsigned)imp->logical_block_size) { 701 brelse(bp); 702 return (EINVAL); 703 } 704 705 /* 706 * Now get a buffer 707 * Abuse a namei buffer for now. 708 */ 709 if (uio->uio_segflg == UIO_SYSSPACE) 710 symname = uio->uio_iov->iov_base; 711 else 712 symname = uma_zalloc(namei_zone, M_WAITOK); 713 714 /* 715 * Ok, we just gathering a symbolic name in SL record. 716 */ 717 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 718 if (uio->uio_segflg != UIO_SYSSPACE) 719 uma_zfree(namei_zone, symname); 720 brelse(bp); 721 return (EINVAL); 722 } 723 /* 724 * Don't forget before you leave from home ;-) 725 */ 726 brelse(bp); 727 728 /* 729 * return with the symbolic name to caller's. 730 */ 731 if (uio->uio_segflg != UIO_SYSSPACE) { 732 error = uiomove(symname, symlen, uio); 733 uma_zfree(namei_zone, symname); 734 return (error); 735 } 736 uio->uio_resid -= symlen; 737 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 738 uio->uio_iov->iov_len -= symlen; 739 return (0); 740 } 741 742 /* 743 * Calculate the logical to physical mapping if not done already, 744 * then call the device strategy routine. 745 */ 746 static int 747 cd9660_strategy(ap) 748 struct vop_strategy_args /* { 749 struct buf *a_vp; 750 struct buf *a_bp; 751 } */ *ap; 752 { 753 struct buf *bp = ap->a_bp; 754 struct vnode *vp = ap->a_vp; 755 struct iso_node *ip; 756 struct bufobj *bo; 757 758 ip = VTOI(vp); 759 if (vp->v_type == VBLK || vp->v_type == VCHR) 760 panic("cd9660_strategy: spec"); 761 if (bp->b_blkno == bp->b_lblkno) { 762 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 763 (ip->i_mnt->im_bshift - DEV_BSHIFT); 764 } 765 bp->b_iooffset = dbtob(bp->b_blkno); 766 bo = ip->i_mnt->im_bo; 767 BO_STRATEGY(bo, bp); 768 return (0); 769 } 770 771 /* 772 * Return POSIX pathconf information applicable to cd9660 filesystems. 773 */ 774 static int 775 cd9660_pathconf(ap) 776 struct vop_pathconf_args /* { 777 struct vnode *a_vp; 778 int a_name; 779 register_t *a_retval; 780 } */ *ap; 781 { 782 783 switch (ap->a_name) { 784 case _PC_LINK_MAX: 785 *ap->a_retval = 1; 786 return (0); 787 case _PC_NAME_MAX: 788 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 789 *ap->a_retval = NAME_MAX; 790 else 791 *ap->a_retval = 37; 792 return (0); 793 case _PC_PATH_MAX: 794 *ap->a_retval = PATH_MAX; 795 return (0); 796 case _PC_PIPE_BUF: 797 *ap->a_retval = PIPE_BUF; 798 return (0); 799 case _PC_CHOWN_RESTRICTED: 800 *ap->a_retval = 1; 801 return (0); 802 case _PC_NO_TRUNC: 803 *ap->a_retval = 1; 804 return (0); 805 default: 806 return (EINVAL); 807 } 808 /* NOTREACHED */ 809 } 810 811 /* 812 * Vnode pointer to File handle 813 */ 814 static int 815 cd9660_vptofh(ap) 816 struct vop_vptofh_args /* { 817 struct vnode *a_vp; 818 struct fid *a_fhp; 819 } */ *ap; 820 { 821 struct ifid ifh; 822 struct iso_node *ip = VTOI(ap->a_vp); 823 824 ifh.ifid_len = sizeof(struct ifid); 825 826 ifh.ifid_ino = ip->i_number; 827 ifh.ifid_start = ip->iso_start; 828 /* 829 * This intentionally uses sizeof(ifh) in order to not copy stack 830 * garbage on ILP32. 831 */ 832 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 833 834 #ifdef ISOFS_DBG 835 printf("vptofh: ino %d, start %ld\n", 836 ifh.ifid_ino, ifh.ifid_start); 837 #endif 838 839 return (0); 840 } 841 842 /* 843 * Global vfs data structures for cd9660 844 */ 845 struct vop_vector cd9660_vnodeops = { 846 .vop_default = &default_vnodeops, 847 .vop_open = cd9660_open, 848 .vop_access = cd9660_access, 849 .vop_bmap = cd9660_bmap, 850 .vop_cachedlookup = cd9660_lookup, 851 .vop_getattr = cd9660_getattr, 852 .vop_inactive = cd9660_inactive, 853 .vop_ioctl = cd9660_ioctl, 854 .vop_lookup = vfs_cache_lookup, 855 .vop_pathconf = cd9660_pathconf, 856 .vop_read = cd9660_read, 857 .vop_readdir = cd9660_readdir, 858 .vop_readlink = cd9660_readlink, 859 .vop_reclaim = cd9660_reclaim, 860 .vop_setattr = cd9660_setattr, 861 .vop_strategy = cd9660_strategy, 862 .vop_vptofh = cd9660_vptofh, 863 }; 864 865 /* 866 * Special device vnode ops 867 */ 868 869 struct vop_vector cd9660_fifoops = { 870 .vop_default = &fifo_specops, 871 .vop_access = cd9660_access, 872 .vop_getattr = cd9660_getattr, 873 .vop_inactive = cd9660_inactive, 874 .vop_reclaim = cd9660_reclaim, 875 .vop_setattr = cd9660_setattr, 876 .vop_vptofh = cd9660_vptofh, 877 };
Cache object: e66313cea4fe57d8580ee11afea51f74
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]