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sys/isofs/cd9660/cd9660_vfsops.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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD: releng/5.2/sys/isofs/cd9660/cd9660_vfsops.c 120492 2003-09-26 20:26:25Z fjoe $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/namei.h> 47 #include <sys/proc.h> 48 #include <sys/kernel.h> 49 #include <sys/vnode.h> 50 #include <sys/mount.h> 51 #include <sys/bio.h> 52 #include <sys/buf.h> 53 #include <sys/cdio.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/malloc.h> 57 #include <sys/stat.h> 58 #include <sys/syslog.h> 59 #include <sys/iconv.h> 60 61 62 #include <isofs/cd9660/iso.h> 63 #include <isofs/cd9660/iso_rrip.h> 64 #include <isofs/cd9660/cd9660_node.h> 65 #include <isofs/cd9660/cd9660_mount.h> 66 67 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); 68 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); 69 70 struct iconv_functions *cd9660_iconv = NULL; 71 72 static vfs_mount_t cd9660_mount; 73 static vfs_unmount_t cd9660_unmount; 74 static vfs_root_t cd9660_root; 75 static vfs_statfs_t cd9660_statfs; 76 static vfs_vget_t cd9660_vget; 77 static vfs_fhtovp_t cd9660_fhtovp; 78 static vfs_vptofh_t cd9660_vptofh; 79 80 static struct vfsops cd9660_vfsops = { 81 .vfs_fhtovp = cd9660_fhtovp, 82 .vfs_init = cd9660_init, 83 .vfs_mount = cd9660_mount, 84 .vfs_root = cd9660_root, 85 .vfs_statfs = cd9660_statfs, 86 .vfs_uninit = cd9660_uninit, 87 .vfs_unmount = cd9660_unmount, 88 .vfs_vget = cd9660_vget, 89 .vfs_vptofh = cd9660_vptofh, 90 }; 91 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 92 MODULE_VERSION(cd9660, 1); 93 94 95 /* 96 * Called by vfs_mountroot when iso is going to be mounted as root. 97 */ 98 99 static int iso_get_ssector(dev_t dev, struct thread *td); 100 static int iso_mountfs(struct vnode *devvp, struct mount *mp, 101 struct thread *td, struct iso_args *argp); 102 103 /* 104 * Try to find the start of the last data track on this CD-ROM. This 105 * is used to mount the last session of a multi-session CD. Bail out 106 * and return 0 if we fail, this is always a safe bet. 107 */ 108 static int 109 iso_get_ssector(dev, td) 110 dev_t dev; 111 struct thread *td; 112 { 113 struct ioc_toc_header h; 114 struct ioc_read_toc_single_entry t; 115 int i; 116 struct cdevsw *bd; 117 d_ioctl_t *ioctlp; 118 119 bd = devsw(dev); 120 ioctlp = bd->d_ioctl; 121 if (ioctlp == NULL) 122 return 0; 123 124 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0) 125 return 0; 126 127 for (i = h.ending_track; i >= 0; i--) { 128 t.address_format = CD_LBA_FORMAT; 129 t.track = i; 130 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) 131 return 0; 132 if ((t.entry.control & 4) != 0) 133 /* found a data track */ 134 break; 135 } 136 137 if (i < 0) 138 return 0; 139 140 return ntohl(t.entry.addr.lba); 141 } 142 143 static int iso_mountroot(struct mount *mp, struct thread *td); 144 145 static int 146 iso_mountroot(mp, td) 147 struct mount *mp; 148 struct thread *td; 149 { 150 struct iso_args args; 151 int error; 152 153 if ((error = bdevvp(rootdev, &rootvp))) { 154 printf("iso_mountroot: can't find rootvp\n"); 155 return (error); 156 } 157 args.flags = ISOFSMNT_ROOT; 158 159 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td); 160 error = VOP_OPEN(rootvp, FREAD, FSCRED, td, -1); 161 VOP_UNLOCK(rootvp, 0, td); 162 if (error) 163 return error; 164 165 args.ssector = iso_get_ssector(rootdev, td); 166 167 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td); 168 169 if (bootverbose) 170 printf("iso_mountroot(): using session at block %d\n", 171 args.ssector); 172 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0) 173 return (error); 174 175 (void)cd9660_statfs(mp, &mp->mnt_stat, td); 176 return (0); 177 } 178 179 /* 180 * VFS Operations. 181 * 182 * mount system call 183 */ 184 static int 185 cd9660_mount(mp, path, data, ndp, td) 186 register struct mount *mp; 187 char *path; 188 caddr_t data; 189 struct nameidata *ndp; 190 struct thread *td; 191 { 192 struct vnode *devvp; 193 struct iso_args args; 194 size_t size; 195 int error; 196 mode_t accessmode; 197 struct iso_mnt *imp = 0; 198 199 if (path == NULL) /* We are doing the initial root mount */ 200 return (iso_mountroot(mp, td)); 201 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) 202 return (error); 203 204 if ((mp->mnt_flag & MNT_RDONLY) == 0) 205 return (EROFS); 206 207 /* 208 * If updating, check whether changing from read-only to 209 * read/write; if there is no device name, that's all we do. 210 */ 211 if (mp->mnt_flag & MNT_UPDATE) { 212 imp = VFSTOISOFS(mp); 213 if (args.fspec == 0) 214 return (vfs_export(mp, &args.export)); 215 } 216 /* 217 * Not an update, or updating the name: look up the name 218 * and verify that it refers to a sensible block device. 219 */ 220 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); 221 if ((error = namei(ndp))) 222 return (error); 223 NDFREE(ndp, NDF_ONLY_PNBUF); 224 devvp = ndp->ni_vp; 225 226 if (!vn_isdisk(devvp, &error)) { 227 vrele(devvp); 228 return (error); 229 } 230 231 /* 232 * Verify that user has necessary permissions on the device, 233 * or has superuser abilities 234 */ 235 accessmode = VREAD; 236 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 237 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 238 if (error) 239 error = suser(td); 240 if (error) { 241 vput(devvp); 242 return (error); 243 } 244 VOP_UNLOCK(devvp, 0, td); 245 246 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 247 error = iso_mountfs(devvp, mp, td, &args); 248 } else { 249 if (devvp != imp->im_devvp) 250 error = EINVAL; /* needs translation */ 251 else 252 vrele(devvp); 253 } 254 if (error) { 255 vrele(devvp); 256 return error; 257 } 258 imp = VFSTOISOFS(mp); 259 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 260 &size); 261 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 262 (void) cd9660_statfs(mp, &mp->mnt_stat, td); 263 return 0; 264 } 265 266 /* 267 * Common code for mount and mountroot 268 */ 269 static int 270 iso_mountfs(devvp, mp, td, argp) 271 register struct vnode *devvp; 272 struct mount *mp; 273 struct thread *td; 274 struct iso_args *argp; 275 { 276 register struct iso_mnt *isomp = (struct iso_mnt *)0; 277 struct buf *bp = NULL; 278 struct buf *pribp = NULL, *supbp = NULL; 279 dev_t dev = devvp->v_rdev; 280 int error = EINVAL; 281 int needclose = 0; 282 int high_sierra = 0; 283 int iso_bsize; 284 int iso_blknum; 285 int joliet_level; 286 struct iso_volume_descriptor *vdp = 0; 287 struct iso_primary_descriptor *pri = NULL; 288 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 289 struct iso_supplementary_descriptor *sup = NULL; 290 struct iso_directory_record *rootp; 291 int logical_block_size; 292 293 if (!(mp->mnt_flag & MNT_RDONLY)) 294 return EROFS; 295 296 /* 297 * Disallow multiple mounts of the same device. 298 * Disallow mounting of a device that is currently in use 299 * (except for root, which might share swap device for miniroot). 300 * Flush out any old buffers remaining from a previous use. 301 */ 302 if ((error = vfs_mountedon(devvp))) 303 return error; 304 if (vcount(devvp) > 1 && devvp != rootvp) 305 return EBUSY; 306 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 307 return (error); 308 309 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 310 error = VOP_OPEN(devvp, FREAD, FSCRED, td, -1); 311 VOP_UNLOCK(devvp, 0, td); 312 if (error) 313 return error; 314 if (devvp->v_rdev->si_iosize_max != 0) 315 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 316 if (mp->mnt_iosize_max > MAXPHYS) 317 mp->mnt_iosize_max = MAXPHYS; 318 319 needclose = 1; 320 321 /* This is the "logical sector size". The standard says this 322 * should be 2048 or the physical sector size on the device, 323 * whichever is greater. For now, we'll just use a constant. 324 */ 325 iso_bsize = ISO_DEFAULT_BLOCK_SIZE; 326 327 joliet_level = 0; 328 for (iso_blknum = 16 + argp->ssector; 329 iso_blknum < 100 + argp->ssector; 330 iso_blknum++) { 331 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize), 332 iso_bsize, NOCRED, &bp)) != 0) 333 goto out; 334 335 vdp = (struct iso_volume_descriptor *)bp->b_data; 336 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 337 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 338 sizeof vdp->id) != 0) { 339 error = EINVAL; 340 goto out; 341 } else 342 high_sierra = 1; 343 } 344 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 345 case ISO_VD_PRIMARY: 346 if (pribp == NULL) { 347 pribp = bp; 348 bp = NULL; 349 pri = (struct iso_primary_descriptor *)vdp; 350 pri_sierra = 351 (struct iso_sierra_primary_descriptor *)vdp; 352 } 353 break; 354 355 case ISO_VD_SUPPLEMENTARY: 356 if (supbp == NULL) { 357 supbp = bp; 358 bp = NULL; 359 sup = (struct iso_supplementary_descriptor *)vdp; 360 361 if (!(argp->flags & ISOFSMNT_NOJOLIET)) { 362 if (bcmp(sup->escape, "%/@", 3) == 0) 363 joliet_level = 1; 364 if (bcmp(sup->escape, "%/C", 3) == 0) 365 joliet_level = 2; 366 if (bcmp(sup->escape, "%/E", 3) == 0) 367 joliet_level = 3; 368 369 if ((isonum_711 (sup->flags) & 1) && 370 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) 371 joliet_level = 0; 372 } 373 } 374 break; 375 376 case ISO_VD_END: 377 goto vd_end; 378 379 default: 380 break; 381 } 382 if (bp) { 383 brelse(bp); 384 bp = NULL; 385 } 386 } 387 vd_end: 388 if (bp) { 389 brelse(bp); 390 bp = NULL; 391 } 392 393 if (pri == NULL) { 394 error = EINVAL; 395 goto out; 396 } 397 398 logical_block_size = 399 isonum_723 (high_sierra? 400 pri_sierra->logical_block_size: 401 pri->logical_block_size); 402 403 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 404 || (logical_block_size & (logical_block_size - 1)) != 0) { 405 error = EINVAL; 406 goto out; 407 } 408 409 rootp = (struct iso_directory_record *) 410 (high_sierra? 411 pri_sierra->root_directory_record: 412 pri->root_directory_record); 413 414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 415 isomp->logical_block_size = logical_block_size; 416 isomp->volume_space_size = 417 isonum_733 (high_sierra? 418 pri_sierra->volume_space_size: 419 pri->volume_space_size); 420 isomp->joliet_level = 0; 421 /* 422 * Since an ISO9660 multi-session CD can also access previous 423 * sessions, we have to include them into the space consider- 424 * ations. This doesn't yield a very accurate number since 425 * parts of the old sessions might be inaccessible now, but we 426 * can't do much better. This is also important for the NFS 427 * filehandle validation. 428 */ 429 isomp->volume_space_size += argp->ssector; 430 bcopy (rootp, isomp->root, sizeof isomp->root); 431 isomp->root_extent = isonum_733 (rootp->extent); 432 isomp->root_size = isonum_733 (rootp->size); 433 434 isomp->im_bmask = logical_block_size - 1; 435 isomp->im_bshift = ffs(logical_block_size) - 1; 436 437 pribp->b_flags |= B_AGE; 438 brelse(pribp); 439 pribp = NULL; 440 441 mp->mnt_data = (qaddr_t)isomp; 442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 444 mp->mnt_maxsymlinklen = 0; 445 mp->mnt_flag |= MNT_LOCAL; 446 isomp->im_mountp = mp; 447 isomp->im_dev = dev; 448 isomp->im_devvp = devvp; 449 450 devvp->v_rdev->si_mountpoint = mp; 451 452 /* Check the Rock Ridge Extention support */ 453 if (!(argp->flags & ISOFSMNT_NORRIP)) { 454 if ((error = bread(isomp->im_devvp, 455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 456 (isomp->im_bshift - DEV_BSHIFT), 457 isomp->logical_block_size, NOCRED, &bp)) != 0) 458 goto out; 459 460 rootp = (struct iso_directory_record *)bp->b_data; 461 462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 463 argp->flags |= ISOFSMNT_NORRIP; 464 } else { 465 argp->flags &= ~ISOFSMNT_GENS; 466 } 467 468 /* 469 * The contents are valid, 470 * but they will get reread as part of another vnode, so... 471 */ 472 bp->b_flags |= B_AGE; 473 brelse(bp); 474 bp = NULL; 475 } 476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | 477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | 478 ISOFSMNT_KICONV); 479 480 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 481 cd9660_iconv->open(argp->cs_local, argp->cs_disk, &isomp->im_d2l); 482 cd9660_iconv->open(argp->cs_disk, argp->cs_local, &isomp->im_l2d); 483 } else { 484 isomp->im_d2l = NULL; 485 isomp->im_l2d = NULL; 486 } 487 488 if (high_sierra) { 489 /* this effectively ignores all the mount flags */ 490 log(LOG_INFO, "cd9660: High Sierra Format\n"); 491 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 492 } else 493 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 494 default: 495 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 496 break; 497 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 498 isomp->iso_ftype = ISO_FTYPE_9660; 499 break; 500 case 0: 501 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 502 isomp->iso_ftype = ISO_FTYPE_RRIP; 503 break; 504 } 505 506 /* Decide whether to use the Joliet descriptor */ 507 508 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 509 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); 510 rootp = (struct iso_directory_record *) 511 sup->root_directory_record; 512 bcopy (rootp, isomp->root, sizeof isomp->root); 513 isomp->root_extent = isonum_733 (rootp->extent); 514 isomp->root_size = isonum_733 (rootp->size); 515 isomp->joliet_level = joliet_level; 516 supbp->b_flags |= B_AGE; 517 } 518 519 if (supbp) { 520 brelse(supbp); 521 supbp = NULL; 522 } 523 524 return 0; 525 out: 526 devvp->v_rdev->si_mountpoint = NULL; 527 if (bp) 528 brelse(bp); 529 if (pribp) 530 brelse(pribp); 531 if (supbp) 532 brelse(supbp); 533 if (needclose) 534 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td); 535 if (isomp) { 536 free((caddr_t)isomp, M_ISOFSMNT); 537 mp->mnt_data = (qaddr_t)0; 538 } 539 return error; 540 } 541 542 /* 543 * unmount system call 544 */ 545 static int 546 cd9660_unmount(mp, mntflags, td) 547 struct mount *mp; 548 int mntflags; 549 struct thread *td; 550 { 551 register struct iso_mnt *isomp; 552 int error, flags = 0; 553 554 if (mntflags & MNT_FORCE) 555 flags |= FORCECLOSE; 556 #if 0 557 mntflushbuf(mp, 0); 558 if (mntinvalbuf(mp)) 559 return EBUSY; 560 #endif 561 if ((error = vflush(mp, 0, flags))) 562 return (error); 563 564 isomp = VFSTOISOFS(mp); 565 566 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 567 if (isomp->im_d2l) 568 cd9660_iconv->close(isomp->im_d2l); 569 if (isomp->im_l2d) 570 cd9660_iconv->close(isomp->im_l2d); 571 } 572 isomp->im_devvp->v_rdev->si_mountpoint = NULL; 573 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td); 574 vrele(isomp->im_devvp); 575 free((caddr_t)isomp, M_ISOFSMNT); 576 mp->mnt_data = (qaddr_t)0; 577 mp->mnt_flag &= ~MNT_LOCAL; 578 return (error); 579 } 580 581 /* 582 * Return root of a filesystem 583 */ 584 static int 585 cd9660_root(mp, vpp) 586 struct mount *mp; 587 struct vnode **vpp; 588 { 589 struct iso_mnt *imp = VFSTOISOFS(mp); 590 struct iso_directory_record *dp = 591 (struct iso_directory_record *)imp->root; 592 ino_t ino = isodirino(dp, imp); 593 594 /* 595 * With RRIP we must use the `.' entry of the root directory. 596 * Simply tell vget, that it's a relocated directory. 597 */ 598 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp, 599 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 600 } 601 602 /* 603 * Get filesystem statistics. 604 */ 605 static int 606 cd9660_statfs(mp, sbp, td) 607 struct mount *mp; 608 register struct statfs *sbp; 609 struct thread *td; 610 { 611 register struct iso_mnt *isomp; 612 613 isomp = VFSTOISOFS(mp); 614 615 sbp->f_bsize = isomp->logical_block_size; 616 sbp->f_iosize = sbp->f_bsize; /* XXX */ 617 sbp->f_blocks = isomp->volume_space_size; 618 sbp->f_bfree = 0; /* total free blocks */ 619 sbp->f_bavail = 0; /* blocks free for non superuser */ 620 sbp->f_files = 0; /* total files */ 621 sbp->f_ffree = 0; /* free file nodes */ 622 if (sbp != &mp->mnt_stat) { 623 sbp->f_type = mp->mnt_vfc->vfc_typenum; 624 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 625 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 626 } 627 return 0; 628 } 629 630 /* 631 * File handle to vnode 632 * 633 * Have to be really careful about stale file handles: 634 * - check that the inode number is in range 635 * - call iget() to get the locked inode 636 * - check for an unallocated inode (i_mode == 0) 637 * - check that the generation number matches 638 */ 639 640 struct ifid { 641 u_short ifid_len; 642 u_short ifid_pad; 643 int ifid_ino; 644 long ifid_start; 645 }; 646 647 /* ARGSUSED */ 648 static int 649 cd9660_fhtovp(mp, fhp, vpp) 650 register struct mount *mp; 651 struct fid *fhp; 652 struct vnode **vpp; 653 { 654 struct ifid *ifhp = (struct ifid *)fhp; 655 register struct iso_node *ip; 656 struct vnode *nvp; 657 int error; 658 659 #ifdef ISOFS_DBG 660 printf("fhtovp: ino %d, start %ld\n", 661 ifhp->ifid_ino, ifhp->ifid_start); 662 #endif 663 664 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 665 *vpp = NULLVP; 666 return (error); 667 } 668 ip = VTOI(nvp); 669 if (ip->inode.iso_mode == 0) { 670 vput(nvp); 671 *vpp = NULLVP; 672 return (ESTALE); 673 } 674 *vpp = nvp; 675 return (0); 676 } 677 678 static int 679 cd9660_vget(mp, ino, flags, vpp) 680 struct mount *mp; 681 ino_t ino; 682 int flags; 683 struct vnode **vpp; 684 { 685 686 /* 687 * XXXX 688 * It would be nice if we didn't always set the `relocated' flag 689 * and force the extra read, but I don't want to think about fixing 690 * that right now. 691 */ 692 return (cd9660_vget_internal(mp, ino, flags, vpp, 693 #if 0 694 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 695 #else 696 0, 697 #endif 698 (struct iso_directory_record *)0)); 699 } 700 701 int 702 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 703 struct mount *mp; 704 ino_t ino; 705 int flags; 706 struct vnode **vpp; 707 int relocated; 708 struct iso_directory_record *isodir; 709 { 710 struct iso_mnt *imp; 711 struct iso_node *ip; 712 struct buf *bp; 713 struct vnode *vp; 714 dev_t dev; 715 int error; 716 717 imp = VFSTOISOFS(mp); 718 dev = imp->im_dev; 719 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0) 720 return (error); 721 if (*vpp != NULL) 722 return (0); 723 724 /* Allocate a new vnode/iso_node. */ 725 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) { 726 *vpp = NULLVP; 727 return (error); 728 } 729 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, 730 M_WAITOK | M_ZERO); 731 vp->v_data = ip; 732 ip->i_vnode = vp; 733 ip->i_dev = dev; 734 ip->i_number = ino; 735 736 /* 737 * Check to be sure that it did not show up. We have to put it 738 * on the hash chain as the cleanup from vput expects to find 739 * it there. 740 */ 741 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 || 742 *vpp != NULL) { 743 cd9660_ihashins(ip); 744 vput(vp); 745 return (error); 746 } 747 748 /* 749 * Put it onto its hash chain and lock it so that other requests for 750 * this inode will block if they arrive while we are sleeping waiting 751 * for old data structures to be purged or for the contents of the 752 * disk portion of this inode to be read. 753 */ 754 cd9660_ihashins(ip); 755 756 if (isodir == 0) { 757 int lbn, off; 758 759 lbn = lblkno(imp, ino); 760 if (lbn >= imp->volume_space_size) { 761 vput(vp); 762 printf("fhtovp: lbn exceed volume space %d\n", lbn); 763 return (ESTALE); 764 } 765 766 off = blkoff(imp, ino); 767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 768 vput(vp); 769 printf("fhtovp: crosses block boundary %d\n", 770 off + ISO_DIRECTORY_RECORD_SIZE); 771 return (ESTALE); 772 } 773 774 error = bread(imp->im_devvp, 775 lbn << (imp->im_bshift - DEV_BSHIFT), 776 imp->logical_block_size, NOCRED, &bp); 777 if (error) { 778 vput(vp); 779 brelse(bp); 780 printf("fhtovp: bread error %d\n",error); 781 return (error); 782 } 783 isodir = (struct iso_directory_record *)(bp->b_data + off); 784 785 if (off + isonum_711(isodir->length) > 786 imp->logical_block_size) { 787 vput(vp); 788 if (bp != 0) 789 brelse(bp); 790 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 791 off +isonum_711(isodir->length), off, 792 isonum_711(isodir->length)); 793 return (ESTALE); 794 } 795 796 #if 0 797 if (isonum_733(isodir->extent) + 798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 799 if (bp != 0) 800 brelse(bp); 801 printf("fhtovp: file start miss %d vs %d\n", 802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 803 ifhp->ifid_start); 804 return (ESTALE); 805 } 806 #endif 807 } else 808 bp = 0; 809 810 ip->i_mnt = imp; 811 ip->i_devvp = imp->im_devvp; 812 VREF(ip->i_devvp); 813 814 if (relocated) { 815 /* 816 * On relocated directories we must 817 * read the `.' entry out of a dir. 818 */ 819 ip->iso_start = ino >> imp->im_bshift; 820 if (bp != 0) 821 brelse(bp); 822 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 823 vput(vp); 824 return (error); 825 } 826 isodir = (struct iso_directory_record *)bp->b_data; 827 } 828 829 ip->iso_extent = isonum_733(isodir->extent); 830 ip->i_size = isonum_733(isodir->size); 831 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 832 833 /* 834 * Setup time stamp, attribute 835 */ 836 vp->v_type = VNON; 837 switch (imp->iso_ftype) { 838 default: /* ISO_FTYPE_9660 */ 839 { 840 struct buf *bp2; 841 int off; 842 if ((imp->im_flags & ISOFSMNT_EXTATT) 843 && (off = isonum_711(isodir->ext_attr_length))) 844 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 845 &bp2); 846 else 847 bp2 = NULL; 848 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 849 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 850 if (bp2) 851 brelse(bp2); 852 break; 853 } 854 case ISO_FTYPE_RRIP: 855 cd9660_rrip_analyze(isodir, ip, imp); 856 break; 857 } 858 859 if (bp != 0) 860 brelse(bp); 861 862 /* 863 * Initialize the associated vnode 864 */ 865 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 866 case VFIFO: 867 vp->v_op = cd9660_fifoop_p; 868 break; 869 case VCHR: 870 case VBLK: 871 vp->v_op = cd9660_specop_p; 872 vp = addaliasu(vp, ip->inode.iso_rdev); 873 ip->i_vnode = vp; 874 break; 875 default: 876 break; 877 } 878 879 if (ip->iso_extent == imp->root_extent) 880 vp->v_vflag |= VV_ROOT; 881 882 /* 883 * XXX need generation number? 884 */ 885 886 *vpp = vp; 887 return (0); 888 } 889 890 /* 891 * Vnode pointer to File handle 892 */ 893 /* ARGSUSED */ 894 static int 895 cd9660_vptofh(vp, fhp) 896 struct vnode *vp; 897 struct fid *fhp; 898 { 899 register struct iso_node *ip = VTOI(vp); 900 register struct ifid *ifhp; 901 902 ifhp = (struct ifid *)fhp; 903 ifhp->ifid_len = sizeof(struct ifid); 904 905 ifhp->ifid_ino = ip->i_number; 906 ifhp->ifid_start = ip->iso_start; 907 908 #ifdef ISOFS_DBG 909 printf("vptofh: ino %d, start %ld\n", 910 ifhp->ifid_ino,ifhp->ifid_start); 911 #endif 912 return 0; 913 }
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