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sys/fs/cd9660/cd9660_vnops.c
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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("$FreeBSD$"); 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 /* NOTE: d_off is the offset of *next* entry. */ 580 idp->current.d_off = idp->curroff; 581 582 switch (imp->iso_ftype) { 583 case ISO_FTYPE_RRIP: 584 ino = idp->current.d_fileno; 585 cd9660_rrip_getname(ep, idp->current.d_name, &namelen, 586 &ino, imp); 587 idp->current.d_fileno = ino; 588 idp->current.d_namlen = (u_char)namelen; 589 if (idp->current.d_namlen) 590 error = iso_uiodir(idp,&idp->current,idp->curroff); 591 break; 592 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 593 strcpy(idp->current.d_name,".."); 594 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 595 idp->current.d_namlen = 1; 596 error = iso_uiodir(idp,&idp->current,idp->curroff); 597 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 598 idp->current.d_namlen = 2; 599 error = iso_uiodir(idp,&idp->current,idp->curroff); 600 } else { 601 isofntrans(ep->name,idp->current.d_namlen, 602 idp->current.d_name, &namelen, 603 imp->iso_ftype == ISO_FTYPE_9660, 604 isonum_711(ep->flags)&4, 605 imp->joliet_level, 606 imp->im_flags, 607 imp->im_d2l); 608 idp->current.d_namlen = (u_char)namelen; 609 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 610 error = iso_shipdir(idp); 611 else 612 error = iso_uiodir(idp,&idp->current,idp->curroff); 613 } 614 } 615 if (error) 616 break; 617 618 entryoffsetinblock += reclen; 619 } 620 621 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 622 idp->current.d_namlen = 0; 623 error = iso_shipdir(idp); 624 } 625 if (error < 0) 626 error = 0; 627 628 if (ap->a_ncookies != NULL) { 629 if (error) 630 free(cookies, M_TEMP); 631 else { 632 /* 633 * Work out the number of cookies actually used. 634 */ 635 *ap->a_ncookies = ncookies - idp->ncookies; 636 *ap->a_cookies = cookies; 637 } 638 } 639 640 if (bp) 641 brelse (bp); 642 643 uio->uio_offset = idp->uio_off; 644 *ap->a_eofflag = idp->eofflag; 645 646 free(idp, M_TEMP); 647 648 return (error); 649 } 650 651 /* 652 * Return target name of a symbolic link 653 * Shouldn't we get the parent vnode and read the data from there? 654 * This could eventually result in deadlocks in cd9660_lookup. 655 * But otherwise the block read here is in the block buffer two times. 656 */ 657 typedef struct iso_directory_record ISODIR; 658 typedef struct iso_node ISONODE; 659 typedef struct iso_mnt ISOMNT; 660 static int 661 cd9660_readlink(ap) 662 struct vop_readlink_args /* { 663 struct vnode *a_vp; 664 struct uio *a_uio; 665 struct ucred *a_cred; 666 } */ *ap; 667 { 668 ISONODE *ip; 669 ISODIR *dirp; 670 ISOMNT *imp; 671 struct buf *bp; 672 struct uio *uio; 673 u_short symlen; 674 int error; 675 char *symname; 676 677 ip = VTOI(ap->a_vp); 678 imp = ip->i_mnt; 679 uio = ap->a_uio; 680 681 if (imp->iso_ftype != ISO_FTYPE_RRIP) 682 return (EINVAL); 683 684 /* 685 * Get parents directory record block that this inode included. 686 */ 687 error = bread(imp->im_devvp, 688 (ip->i_number >> imp->im_bshift) << 689 (imp->im_bshift - DEV_BSHIFT), 690 imp->logical_block_size, NOCRED, &bp); 691 if (error) { 692 brelse(bp); 693 return (EINVAL); 694 } 695 696 /* 697 * Setup the directory pointer for this inode 698 */ 699 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 700 701 /* 702 * Just make sure, we have a right one.... 703 * 1: Check not cross boundary on block 704 */ 705 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 706 > (unsigned)imp->logical_block_size) { 707 brelse(bp); 708 return (EINVAL); 709 } 710 711 /* 712 * Now get a buffer 713 * Abuse a namei buffer for now. 714 */ 715 if (uio->uio_segflg == UIO_SYSSPACE) 716 symname = uio->uio_iov->iov_base; 717 else 718 symname = uma_zalloc(namei_zone, M_WAITOK); 719 720 /* 721 * Ok, we just gathering a symbolic name in SL record. 722 */ 723 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 724 if (uio->uio_segflg != UIO_SYSSPACE) 725 uma_zfree(namei_zone, symname); 726 brelse(bp); 727 return (EINVAL); 728 } 729 /* 730 * Don't forget before you leave from home ;-) 731 */ 732 brelse(bp); 733 734 /* 735 * return with the symbolic name to caller's. 736 */ 737 if (uio->uio_segflg != UIO_SYSSPACE) { 738 error = uiomove(symname, symlen, uio); 739 uma_zfree(namei_zone, symname); 740 return (error); 741 } 742 uio->uio_resid -= symlen; 743 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 744 uio->uio_iov->iov_len -= symlen; 745 return (0); 746 } 747 748 /* 749 * Calculate the logical to physical mapping if not done already, 750 * then call the device strategy routine. 751 */ 752 static int 753 cd9660_strategy(ap) 754 struct vop_strategy_args /* { 755 struct buf *a_vp; 756 struct buf *a_bp; 757 } */ *ap; 758 { 759 struct buf *bp = ap->a_bp; 760 struct vnode *vp = ap->a_vp; 761 struct iso_node *ip; 762 struct bufobj *bo; 763 764 ip = VTOI(vp); 765 if (vp->v_type == VBLK || vp->v_type == VCHR) 766 panic("cd9660_strategy: spec"); 767 if (bp->b_blkno == bp->b_lblkno) { 768 bp->b_blkno = (ip->iso_start + bp->b_lblkno) << 769 (ip->i_mnt->im_bshift - DEV_BSHIFT); 770 } 771 bp->b_iooffset = dbtob(bp->b_blkno); 772 bo = ip->i_mnt->im_bo; 773 BO_STRATEGY(bo, bp); 774 return (0); 775 } 776 777 /* 778 * Return POSIX pathconf information applicable to cd9660 filesystems. 779 */ 780 static int 781 cd9660_pathconf(ap) 782 struct vop_pathconf_args /* { 783 struct vnode *a_vp; 784 int a_name; 785 register_t *a_retval; 786 } */ *ap; 787 { 788 789 switch (ap->a_name) { 790 case _PC_FILESIZEBITS: 791 *ap->a_retval = 32; 792 return (0); 793 case _PC_LINK_MAX: 794 *ap->a_retval = 1; 795 return (0); 796 case _PC_NAME_MAX: 797 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 798 *ap->a_retval = NAME_MAX; 799 else 800 *ap->a_retval = 37; 801 return (0); 802 case _PC_SYMLINK_MAX: 803 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) { 804 *ap->a_retval = MAXPATHLEN; 805 return (0); 806 } 807 return (EINVAL); 808 case _PC_NO_TRUNC: 809 *ap->a_retval = 1; 810 return (0); 811 default: 812 return (vop_stdpathconf(ap)); 813 } 814 /* NOTREACHED */ 815 } 816 817 /* 818 * Vnode pointer to File handle 819 */ 820 static int 821 cd9660_vptofh(ap) 822 struct vop_vptofh_args /* { 823 struct vnode *a_vp; 824 struct fid *a_fhp; 825 } */ *ap; 826 { 827 struct ifid ifh; 828 struct iso_node *ip = VTOI(ap->a_vp); 829 830 ifh.ifid_len = sizeof(struct ifid); 831 832 ifh.ifid_ino = ip->i_number; 833 ifh.ifid_start = ip->iso_start; 834 /* 835 * This intentionally uses sizeof(ifh) in order to not copy stack 836 * garbage on ILP32. 837 */ 838 memcpy(ap->a_fhp, &ifh, sizeof(ifh)); 839 840 #ifdef ISOFS_DBG 841 printf("vptofh: ino %jd, start %ld\n", 842 (uintmax_t)ifh.ifid_ino, ifh.ifid_start); 843 #endif 844 845 return (0); 846 } 847 848 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "cd9660 filesystem"); 849 static int use_buf_pager = 1; 850 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, 851 &use_buf_pager, 0, 852 "Use buffer pager instead of bmap"); 853 854 static daddr_t 855 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 856 { 857 858 return (lblkno(VTOI(vp)->i_mnt, off)); 859 } 860 861 static int 862 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz) 863 { 864 struct iso_node *ip; 865 866 ip = VTOI(vp); 867 *sz = blksize(ip->i_mnt, ip, lbn); 868 return (0); 869 } 870 871 static int 872 cd9660_getpages(struct vop_getpages_args *ap) 873 { 874 struct vnode *vp; 875 876 vp = ap->a_vp; 877 if (vp->v_type == VCHR || vp->v_type == VBLK) 878 return (EOPNOTSUPP); 879 880 if (use_buf_pager) 881 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, 882 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno, 883 cd9660_gbp_getblksz)); 884 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count, 885 ap->a_rbehind, ap->a_rahead, NULL, NULL)); 886 } 887 888 /* 889 * Global vfs data structures for cd9660 890 */ 891 struct vop_vector cd9660_vnodeops = { 892 .vop_default = &default_vnodeops, 893 .vop_open = cd9660_open, 894 .vop_access = cd9660_access, 895 .vop_bmap = cd9660_bmap, 896 .vop_cachedlookup = cd9660_lookup, 897 .vop_getattr = cd9660_getattr, 898 .vop_inactive = cd9660_inactive, 899 .vop_ioctl = cd9660_ioctl, 900 .vop_lookup = vfs_cache_lookup, 901 .vop_pathconf = cd9660_pathconf, 902 .vop_read = cd9660_read, 903 .vop_readdir = cd9660_readdir, 904 .vop_readlink = cd9660_readlink, 905 .vop_reclaim = cd9660_reclaim, 906 .vop_setattr = cd9660_setattr, 907 .vop_strategy = cd9660_strategy, 908 .vop_vptofh = cd9660_vptofh, 909 .vop_getpages = cd9660_getpages, 910 }; 911 912 /* 913 * Special device vnode ops 914 */ 915 916 struct vop_vector cd9660_fifoops = { 917 .vop_default = &fifo_specops, 918 .vop_access = cd9660_access, 919 .vop_getattr = cd9660_getattr, 920 .vop_inactive = cd9660_inactive, 921 .vop_reclaim = cd9660_reclaim, 922 .vop_setattr = cd9660_setattr, 923 .vop_vptofh = cd9660_vptofh, 924 };
Cache object: dc1227a3889e91e70488d2540b7741e5
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