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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 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 struct thread *a_td; 190 } */ *ap; 191 192 { 193 struct vnode *vp = ap->a_vp; 194 struct vattr *vap = ap->a_vap; 195 struct iso_node *ip = VTOI(vp); 196 197 vap->va_fsid = dev2udev(ip->i_mnt->im_dev); 198 vap->va_fileid = ip->i_number; 199 200 vap->va_mode = ip->inode.iso_mode; 201 vap->va_nlink = ip->inode.iso_links; 202 vap->va_uid = ip->inode.iso_uid; 203 vap->va_gid = ip->inode.iso_gid; 204 vap->va_atime = ip->inode.iso_atime; 205 vap->va_mtime = ip->inode.iso_mtime; 206 vap->va_ctime = ip->inode.iso_ctime; 207 vap->va_rdev = ip->inode.iso_rdev; 208 209 vap->va_size = (u_quad_t) ip->i_size; 210 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 211 struct vop_readlink_args rdlnk; 212 struct iovec aiov; 213 struct uio auio; 214 char *cp; 215 216 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 217 aiov.iov_base = cp; 218 aiov.iov_len = MAXPATHLEN; 219 auio.uio_iov = &aiov; 220 auio.uio_iovcnt = 1; 221 auio.uio_offset = 0; 222 auio.uio_rw = UIO_READ; 223 auio.uio_segflg = UIO_SYSSPACE; 224 auio.uio_td = ap->a_td; 225 auio.uio_resid = MAXPATHLEN; 226 rdlnk.a_uio = &auio; 227 rdlnk.a_vp = ap->a_vp; 228 rdlnk.a_cred = ap->a_cred; 229 if (cd9660_readlink(&rdlnk) == 0) 230 vap->va_size = MAXPATHLEN - auio.uio_resid; 231 FREE(cp, M_TEMP); 232 } 233 vap->va_flags = 0; 234 vap->va_gen = 1; 235 vap->va_blocksize = ip->i_mnt->logical_block_size; 236 vap->va_bytes = (u_quad_t) ip->i_size; 237 vap->va_type = vp->v_type; 238 vap->va_filerev = 0; 239 return (0); 240 } 241 242 /* 243 * Vnode op for ioctl. 244 */ 245 static int 246 cd9660_ioctl(ap) 247 struct vop_ioctl_args /* { 248 struct vnode *a_vp; 249 u_long a_command; 250 caddr_t a_data; 251 int a_fflag; 252 struct ucred *a_cred; 253 struct thread *a_td; 254 } */ *ap; 255 { 256 struct vnode *vp; 257 struct iso_node *ip; 258 int error; 259 260 vp = ap->a_vp; 261 vn_lock(vp, LK_SHARED | LK_RETRY, ap->a_td); 262 if (vp->v_iflag & VI_DOOMED) { 263 VOP_UNLOCK(vp, 0, ap->a_td); 264 return (EBADF); 265 } 266 if (vp->v_type == VCHR || vp->v_type == VBLK) { 267 VOP_UNLOCK(vp, 0, ap->a_td); 268 return (EOPNOTSUPP); 269 } 270 271 ip = VTOI(vp); 272 error = 0; 273 274 switch (ap->a_command) { 275 case FIOGETLBA: 276 *(int *)(ap->a_data) = ip->iso_start; 277 break; 278 default: 279 error = ENOTTY; 280 break; 281 } 282 283 VOP_UNLOCK(vp, 0, ap->a_td); 284 return (error); 285 } 286 287 /* 288 * Vnode op for reading. 289 */ 290 static int 291 cd9660_read(ap) 292 struct vop_read_args /* { 293 struct vnode *a_vp; 294 struct uio *a_uio; 295 int a_ioflag; 296 struct ucred *a_cred; 297 } */ *ap; 298 { 299 struct vnode *vp = ap->a_vp; 300 struct uio *uio = ap->a_uio; 301 struct iso_node *ip = VTOI(vp); 302 struct iso_mnt *imp; 303 struct buf *bp; 304 daddr_t lbn, rablock; 305 off_t diff; 306 int rasize, error = 0; 307 int seqcount; 308 long size, n, on; 309 310 if (vp->v_type == VCHR || vp->v_type == VBLK) 311 return (EOPNOTSUPP); 312 313 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 314 315 if (uio->uio_resid == 0) 316 return (0); 317 if (uio->uio_offset < 0) 318 return (EINVAL); 319 ip->i_flag |= IN_ACCESS; 320 imp = ip->i_mnt; 321 do { 322 lbn = lblkno(imp, uio->uio_offset); 323 on = blkoff(imp, uio->uio_offset); 324 n = min((u_int)(imp->logical_block_size - on), 325 uio->uio_resid); 326 diff = (off_t)ip->i_size - uio->uio_offset; 327 if (diff <= 0) 328 return (0); 329 if (diff < n) 330 n = diff; 331 size = blksize(imp, ip, lbn); 332 rablock = lbn + 1; 333 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 334 if (lblktosize(imp, rablock) < ip->i_size) 335 error = cluster_read(vp, (off_t)ip->i_size, 336 lbn, size, NOCRED, uio->uio_resid, 337 (ap->a_ioflag >> 16), &bp); 338 else 339 error = bread(vp, lbn, size, NOCRED, &bp); 340 } else { 341 if (seqcount > 1 && 342 lblktosize(imp, rablock) < ip->i_size) { 343 rasize = blksize(imp, ip, rablock); 344 error = breadn(vp, lbn, size, &rablock, 345 &rasize, 1, NOCRED, &bp); 346 } else 347 error = bread(vp, lbn, size, NOCRED, &bp); 348 } 349 n = min(n, size - bp->b_resid); 350 if (error) { 351 brelse(bp); 352 return (error); 353 } 354 355 error = uiomove(bp->b_data + on, (int)n, uio); 356 brelse(bp); 357 } while (error == 0 && uio->uio_resid > 0 && n != 0); 358 return (error); 359 } 360 361 /* 362 * Structure for reading directories 363 */ 364 struct isoreaddir { 365 struct dirent saveent; 366 struct dirent assocent; 367 struct dirent current; 368 off_t saveoff; 369 off_t assocoff; 370 off_t curroff; 371 struct uio *uio; 372 off_t uio_off; 373 int eofflag; 374 u_long *cookies; 375 int ncookies; 376 }; 377 378 static int 379 iso_uiodir(idp,dp,off) 380 struct isoreaddir *idp; 381 struct dirent *dp; 382 off_t off; 383 { 384 int error; 385 386 dp->d_name[dp->d_namlen] = 0; 387 dp->d_reclen = GENERIC_DIRSIZ(dp); 388 389 if (idp->uio->uio_resid < dp->d_reclen) { 390 idp->eofflag = 0; 391 return (-1); 392 } 393 394 if (idp->cookies) { 395 if (idp->ncookies <= 0) { 396 idp->eofflag = 0; 397 return (-1); 398 } 399 400 *idp->cookies++ = off; 401 --idp->ncookies; 402 } 403 404 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0) 405 return (error); 406 idp->uio_off = off; 407 return (0); 408 } 409 410 static int 411 iso_shipdir(idp) 412 struct isoreaddir *idp; 413 { 414 struct dirent *dp; 415 int cl, sl, assoc; 416 int error; 417 char *cname, *sname; 418 419 cl = idp->current.d_namlen; 420 cname = idp->current.d_name; 421 assoc = (cl > 1) && (*cname == ASSOCCHAR); 422 if (assoc) { 423 cl--; 424 cname++; 425 } 426 427 dp = &idp->saveent; 428 sname = dp->d_name; 429 if (!(sl = dp->d_namlen)) { 430 dp = &idp->assocent; 431 sname = dp->d_name + 1; 432 sl = dp->d_namlen - 1; 433 } 434 if (sl > 0) { 435 if (sl != cl 436 || bcmp(sname,cname,sl)) { 437 if (idp->assocent.d_namlen) { 438 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 439 return (error); 440 idp->assocent.d_namlen = 0; 441 } 442 if (idp->saveent.d_namlen) { 443 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 444 return (error); 445 idp->saveent.d_namlen = 0; 446 } 447 } 448 } 449 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 450 if (assoc) { 451 idp->assocoff = idp->curroff; 452 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 453 } else { 454 idp->saveoff = idp->curroff; 455 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 456 } 457 return (0); 458 } 459 460 /* 461 * Vnode op for readdir 462 */ 463 static int 464 cd9660_readdir(ap) 465 struct vop_readdir_args /* { 466 struct vnode *a_vp; 467 struct uio *a_uio; 468 struct ucred *a_cred; 469 int *a_eofflag; 470 int *a_ncookies; 471 u_long **a_cookies; 472 } */ *ap; 473 { 474 struct uio *uio = ap->a_uio; 475 struct isoreaddir *idp; 476 struct vnode *vdp = ap->a_vp; 477 struct iso_node *dp; 478 struct iso_mnt *imp; 479 struct buf *bp = NULL; 480 struct iso_directory_record *ep; 481 int entryoffsetinblock; 482 doff_t endsearch; 483 u_long bmask; 484 int error = 0; 485 int reclen; 486 u_short namelen; 487 int ncookies = 0; 488 u_long *cookies = NULL; 489 490 dp = VTOI(vdp); 491 imp = dp->i_mnt; 492 bmask = imp->im_bmask; 493 494 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 495 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 496 /* 497 * XXX 498 * Is it worth trying to figure out the type? 499 */ 500 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 501 DT_UNKNOWN; 502 idp->uio = uio; 503 if (ap->a_ncookies == NULL) { 504 idp->cookies = NULL; 505 } else { 506 /* 507 * Guess the number of cookies needed. 508 */ 509 ncookies = uio->uio_resid / 16; 510 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 511 M_TEMP, M_WAITOK); 512 idp->cookies = cookies; 513 idp->ncookies = ncookies; 514 } 515 idp->eofflag = 1; 516 idp->curroff = uio->uio_offset; 517 idp->uio_off = uio->uio_offset; 518 519 if ((entryoffsetinblock = idp->curroff & bmask) && 520 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 521 FREE(idp, M_TEMP); 522 return (error); 523 } 524 endsearch = dp->i_size; 525 526 while (idp->curroff < endsearch) { 527 /* 528 * If offset is on a block boundary, 529 * read the next directory block. 530 * Release previous if it exists. 531 */ 532 if ((idp->curroff & bmask) == 0) { 533 if (bp != NULL) 534 brelse(bp); 535 if ((error = 536 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 537 break; 538 entryoffsetinblock = 0; 539 } 540 /* 541 * Get pointer to next entry. 542 */ 543 ep = (struct iso_directory_record *) 544 ((char *)bp->b_data + entryoffsetinblock); 545 546 reclen = isonum_711(ep->length); 547 if (reclen == 0) { 548 /* skip to next block, if any */ 549 idp->curroff = 550 (idp->curroff & ~bmask) + imp->logical_block_size; 551 continue; 552 } 553 554 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 555 error = EINVAL; 556 /* illegal entry, stop */ 557 break; 558 } 559 560 if (entryoffsetinblock + reclen > imp->logical_block_size) { 561 error = EINVAL; 562 /* illegal directory, so stop looking */ 563 break; 564 } 565 566 idp->current.d_namlen = isonum_711(ep->name_len); 567 568 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 569 error = EINVAL; 570 /* illegal entry, stop */ 571 break; 572 } 573 574 if (isonum_711(ep->flags)&2) 575 idp->current.d_fileno = isodirino(ep, imp); 576 else 577 idp->current.d_fileno = dbtob(bp->b_blkno) + 578 entryoffsetinblock; 579 580 idp->curroff += reclen; 581 582 switch (imp->iso_ftype) { 583 case ISO_FTYPE_RRIP: 584 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 585 &idp->current.d_fileno,imp); 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 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */ 769 clrbuf(bp); 770 } 771 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */ 772 bufdone(bp); 773 return (0); 774 } 775 bp->b_iooffset = dbtob(bp->b_blkno); 776 bo = ip->i_mnt->im_bo; 777 BO_STRATEGY(bo, bp); 778 return (0); 779 } 780 781 /* 782 * Return POSIX pathconf information applicable to cd9660 filesystems. 783 */ 784 static int 785 cd9660_pathconf(ap) 786 struct vop_pathconf_args /* { 787 struct vnode *a_vp; 788 int a_name; 789 register_t *a_retval; 790 } */ *ap; 791 { 792 793 switch (ap->a_name) { 794 case _PC_LINK_MAX: 795 *ap->a_retval = 1; 796 return (0); 797 case _PC_NAME_MAX: 798 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 799 *ap->a_retval = NAME_MAX; 800 else 801 *ap->a_retval = 37; 802 return (0); 803 case _PC_PATH_MAX: 804 *ap->a_retval = PATH_MAX; 805 return (0); 806 case _PC_PIPE_BUF: 807 *ap->a_retval = PIPE_BUF; 808 return (0); 809 case _PC_CHOWN_RESTRICTED: 810 *ap->a_retval = 1; 811 return (0); 812 case _PC_NO_TRUNC: 813 *ap->a_retval = 1; 814 return (0); 815 default: 816 return (EINVAL); 817 } 818 /* NOTREACHED */ 819 } 820 821 /* 822 * Vnode pointer to File handle 823 */ 824 static int 825 cd9660_vptofh(ap) 826 struct vop_vptofh_args /* { 827 struct vnode *a_vp; 828 struct fid *a_fhp; 829 } */ *ap; 830 { 831 struct ifid ifh; 832 struct iso_node *ip = VTOI(ap->a_vp); 833 834 ifh.ifid_len = sizeof(struct ifid); 835 836 ifh.ifid_ino = ip->i_number; 837 ifh.ifid_start = ip->iso_start; 838 /* 839 * This intentionally uses sizeof(ifh) in order to not copy stack 840 * garbage on ILP32. 841 */ 842 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 843 844 #ifdef ISOFS_DBG 845 printf("vptofh: ino %d, start %ld\n", 846 ifh.ifid_ino, ifh.ifid_start); 847 #endif 848 849 return (0); 850 } 851 852 /* 853 * Global vfs data structures for cd9660 854 */ 855 struct vop_vector cd9660_vnodeops = { 856 .vop_default = &default_vnodeops, 857 .vop_open = cd9660_open, 858 .vop_access = cd9660_access, 859 .vop_bmap = cd9660_bmap, 860 .vop_cachedlookup = cd9660_lookup, 861 .vop_getattr = cd9660_getattr, 862 .vop_inactive = cd9660_inactive, 863 .vop_ioctl = cd9660_ioctl, 864 .vop_lookup = vfs_cache_lookup, 865 .vop_pathconf = cd9660_pathconf, 866 .vop_read = cd9660_read, 867 .vop_readdir = cd9660_readdir, 868 .vop_readlink = cd9660_readlink, 869 .vop_reclaim = cd9660_reclaim, 870 .vop_setattr = cd9660_setattr, 871 .vop_strategy = cd9660_strategy, 872 .vop_vptofh = cd9660_vptofh, 873 }; 874 875 /* 876 * Special device vnode ops 877 */ 878 879 struct vop_vector cd9660_fifoops = { 880 .vop_default = &fifo_specops, 881 .vop_access = cd9660_access, 882 .vop_getattr = cd9660_getattr, 883 .vop_inactive = cd9660_inactive, 884 .vop_reclaim = cd9660_reclaim, 885 .vop_setattr = cd9660_setattr, 886 .vop_vptofh = cd9660_vptofh, 887 };
Cache object: c05ed253f0211c515fee4a8cd299520f
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