1 /* $NetBSD: udf_vfsops.c,v 1.62 2011/11/14 18:35:14 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __KERNEL_RCSID(0, "$NetBSD: udf_vfsops.c,v 1.62 2011/11/14 18:35:14 hannken Exp $"); 32 #endif /* not lint */ 33 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_compat_netbsd.h" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/sysctl.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/kernel.h> 45 #include <sys/vnode.h> 46 #include <miscfs/genfs/genfs.h> 47 #include <miscfs/specfs/specdev.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/file.h> 51 #include <sys/device.h> 52 #include <sys/disklabel.h> 53 #include <sys/ioctl.h> 54 #include <sys/malloc.h> 55 #include <sys/dirent.h> 56 #include <sys/stat.h> 57 #include <sys/conf.h> 58 #include <sys/kauth.h> 59 #include <sys/module.h> 60 61 #include <fs/udf/ecma167-udf.h> 62 #include <fs/udf/udf_mount.h> 63 #include <sys/dirhash.h> 64 65 #include "udf.h" 66 #include "udf_subr.h" 67 #include "udf_bswap.h" 68 69 MODULE(MODULE_CLASS_VFS, udf, NULL); 70 71 #define VTOI(vnode) ((struct udf_node *) vnode->v_data) 72 73 /* verbose levels of the udf filingsystem */ 74 int udf_verbose = UDF_DEBUGGING; 75 76 /* malloc regions */ 77 MALLOC_JUSTDEFINE(M_UDFMNT, "UDF mount", "UDF mount structures"); 78 MALLOC_JUSTDEFINE(M_UDFVOLD, "UDF volspace", "UDF volume space descriptors"); 79 MALLOC_JUSTDEFINE(M_UDFTEMP, "UDF temp", "UDF scrap space"); 80 struct pool udf_node_pool; 81 82 /* supported functions predefined */ 83 VFS_PROTOS(udf); 84 85 static struct sysctllog *udf_sysctl_log; 86 87 /* internal functions */ 88 static int udf_mountfs(struct vnode *, struct mount *, struct lwp *, struct udf_args *); 89 90 91 /* --------------------------------------------------------------------- */ 92 93 /* predefine vnode-op list descriptor */ 94 extern const struct vnodeopv_desc udf_vnodeop_opv_desc; 95 96 const struct vnodeopv_desc * const udf_vnodeopv_descs[] = { 97 &udf_vnodeop_opv_desc, 98 NULL, 99 }; 100 101 102 /* vfsops descriptor linked in as anchor point for the filingsystem */ 103 struct vfsops udf_vfsops = { 104 MOUNT_UDF, /* vfs_name */ 105 sizeof (struct udf_args), 106 udf_mount, 107 udf_start, 108 udf_unmount, 109 udf_root, 110 (void *)eopnotsupp, /* vfs_quotactl */ 111 udf_statvfs, 112 udf_sync, 113 udf_vget, 114 udf_fhtovp, 115 udf_vptofh, 116 udf_init, 117 udf_reinit, 118 udf_done, 119 udf_mountroot, 120 udf_snapshot, 121 vfs_stdextattrctl, 122 (void *)eopnotsupp, /* vfs_suspendctl */ 123 genfs_renamelock_enter, 124 genfs_renamelock_exit, 125 (void *)eopnotsupp, 126 udf_vnodeopv_descs, 127 0, /* int vfs_refcount */ 128 { NULL, NULL, }, /* LIST_ENTRY(vfsops) */ 129 }; 130 131 /* --------------------------------------------------------------------- */ 132 133 /* file system starts here */ 134 void 135 udf_init(void) 136 { 137 size_t size; 138 139 /* setup memory types */ 140 malloc_type_attach(M_UDFMNT); 141 malloc_type_attach(M_UDFVOLD); 142 malloc_type_attach(M_UDFTEMP); 143 144 /* init node pools */ 145 size = sizeof(struct udf_node); 146 pool_init(&udf_node_pool, size, 0, 0, 0, 147 "udf_node_pool", NULL, IPL_NONE); 148 } 149 150 151 void 152 udf_reinit(void) 153 { 154 /* nothing to do */ 155 } 156 157 158 void 159 udf_done(void) 160 { 161 /* remove pools */ 162 pool_destroy(&udf_node_pool); 163 164 malloc_type_detach(M_UDFMNT); 165 malloc_type_detach(M_UDFVOLD); 166 malloc_type_detach(M_UDFTEMP); 167 } 168 169 /* 170 * If running a DEBUG kernel, provide an easy way to set the debug flags when 171 * running into a problem. 172 */ 173 #define UDF_VERBOSE_SYSCTLOPT 1 174 175 static int 176 udf_modcmd(modcmd_t cmd, void *arg) 177 { 178 const struct sysctlnode *node; 179 int error; 180 181 switch (cmd) { 182 case MODULE_CMD_INIT: 183 error = vfs_attach(&udf_vfsops); 184 if (error != 0) 185 break; 186 /* 187 * XXX the "24" below could be dynamic, thereby eliminating one 188 * more instance of the "number to vfs" mapping problem, but 189 * "24" is the order as taken from sys/mount.h 190 */ 191 sysctl_createv(&udf_sysctl_log, 0, NULL, NULL, 192 CTLFLAG_PERMANENT, 193 CTLTYPE_NODE, "vfs", NULL, 194 NULL, 0, NULL, 0, 195 CTL_VFS, CTL_EOL); 196 sysctl_createv(&udf_sysctl_log, 0, NULL, &node, 197 CTLFLAG_PERMANENT, 198 CTLTYPE_NODE, "udf", 199 SYSCTL_DESCR("OSTA Universal File System"), 200 NULL, 0, NULL, 0, 201 CTL_VFS, 24, CTL_EOL); 202 #ifdef DEBUG 203 sysctl_createv(&udf_sysctl_log, 0, NULL, &node, 204 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 205 CTLTYPE_INT, "verbose", 206 SYSCTL_DESCR("Bitmask for filesystem debugging"), 207 NULL, 0, &udf_verbose, 0, 208 CTL_VFS, 24, UDF_VERBOSE_SYSCTLOPT, CTL_EOL); 209 #endif 210 break; 211 case MODULE_CMD_FINI: 212 error = vfs_detach(&udf_vfsops); 213 if (error != 0) 214 break; 215 sysctl_teardown(&udf_sysctl_log); 216 break; 217 default: 218 error = ENOTTY; 219 break; 220 } 221 222 return (error); 223 } 224 225 /* --------------------------------------------------------------------- */ 226 227 int 228 udf_mountroot(void) 229 { 230 return EOPNOTSUPP; 231 } 232 233 /* --------------------------------------------------------------------- */ 234 235 #define MPFREE(a, lst) \ 236 if ((a)) free((a), lst); 237 static void 238 free_udf_mountinfo(struct mount *mp) 239 { 240 struct udf_mount *ump; 241 int i; 242 243 if (!mp) 244 return; 245 246 ump = VFSTOUDF(mp); 247 if (ump) { 248 /* clear our data */ 249 for (i = 0; i < UDF_ANCHORS; i++) 250 MPFREE(ump->anchors[i], M_UDFVOLD); 251 MPFREE(ump->primary_vol, M_UDFVOLD); 252 MPFREE(ump->logical_vol, M_UDFVOLD); 253 MPFREE(ump->unallocated, M_UDFVOLD); 254 MPFREE(ump->implementation, M_UDFVOLD); 255 MPFREE(ump->logvol_integrity, M_UDFVOLD); 256 for (i = 0; i < UDF_PARTITIONS; i++) { 257 MPFREE(ump->partitions[i], M_UDFVOLD); 258 MPFREE(ump->part_unalloc_dscr[i], M_UDFVOLD); 259 MPFREE(ump->part_freed_dscr[i], M_UDFVOLD); 260 } 261 MPFREE(ump->metadata_unalloc_dscr, M_UDFVOLD); 262 263 MPFREE(ump->fileset_desc, M_UDFVOLD); 264 MPFREE(ump->sparing_table, M_UDFVOLD); 265 266 MPFREE(ump->la_node_ad_cpy, M_UDFMNT); 267 MPFREE(ump->la_pmapping, M_TEMP); 268 MPFREE(ump->la_lmapping, M_TEMP); 269 270 mutex_destroy(&ump->ihash_lock); 271 mutex_destroy(&ump->get_node_lock); 272 mutex_destroy(&ump->logvol_mutex); 273 mutex_destroy(&ump->allocate_mutex); 274 cv_destroy(&ump->dirtynodes_cv); 275 276 MPFREE(ump->vat_table, M_UDFVOLD); 277 278 free(ump, M_UDFMNT); 279 } 280 } 281 #undef MPFREE 282 283 /* --------------------------------------------------------------------- */ 284 285 /* if the system nodes exist, release them */ 286 static void 287 udf_release_system_nodes(struct mount *mp) 288 { 289 struct udf_mount *ump = VFSTOUDF(mp); 290 int error; 291 292 /* if we haven't even got an ump, dont bother */ 293 if (!ump) 294 return; 295 296 /* VAT partition support */ 297 if (ump->vat_node) 298 vrele(ump->vat_node->vnode); 299 300 /* Metadata partition support */ 301 if (ump->metadata_node) 302 vrele(ump->metadata_node->vnode); 303 if (ump->metadatamirror_node) 304 vrele(ump->metadatamirror_node->vnode); 305 if (ump->metadatabitmap_node) 306 vrele(ump->metadatabitmap_node->vnode); 307 308 /* This flush should NOT write anything nor allow any node to remain */ 309 if ((error = vflush(ump->vfs_mountp, NULLVP, 0)) != 0) 310 panic("Failure to flush UDF system vnodes\n"); 311 } 312 313 314 int 315 udf_mount(struct mount *mp, const char *path, 316 void *data, size_t *data_len) 317 { 318 struct lwp *l = curlwp; 319 struct udf_args *args = data; 320 struct udf_mount *ump; 321 struct vnode *devvp; 322 int openflags, accessmode, error; 323 324 DPRINTF(CALL, ("udf_mount called\n")); 325 326 if (*data_len < sizeof *args) 327 return EINVAL; 328 329 if (mp->mnt_flag & MNT_GETARGS) { 330 /* request for the mount arguments */ 331 ump = VFSTOUDF(mp); 332 if (ump == NULL) 333 return EINVAL; 334 *args = ump->mount_args; 335 *data_len = sizeof *args; 336 return 0; 337 } 338 339 /* handle request for updating mount parameters */ 340 /* TODO can't update my mountpoint yet */ 341 if (mp->mnt_flag & MNT_UPDATE) { 342 return EOPNOTSUPP; 343 } 344 345 /* OK, so we are asked to mount the device */ 346 347 /* check/translate struct version */ 348 /* TODO sanity checking other mount arguments */ 349 if (args->version != 1) { 350 printf("mount_udf: unrecognized argument structure version\n"); 351 return EINVAL; 352 } 353 354 /* lookup name to get its vnode */ 355 error = namei_simple_user(args->fspec, 356 NSM_FOLLOW_NOEMULROOT, &devvp); 357 if (error) 358 return error; 359 360 #ifdef DEBUG 361 if (udf_verbose & UDF_DEBUG_VOLUMES) 362 vprint("UDF mount, trying to mount \n", devvp); 363 #endif 364 365 /* check if its a block device specified */ 366 if (devvp->v_type != VBLK) { 367 vrele(devvp); 368 return ENOTBLK; 369 } 370 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 371 vrele(devvp); 372 return ENXIO; 373 } 374 375 /* 376 * If mount by non-root, then verify that user has necessary 377 * permissions on the device. 378 */ 379 accessmode = VREAD; 380 if ((mp->mnt_flag & MNT_RDONLY) == 0) 381 accessmode |= VWRITE; 382 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 383 error = genfs_can_mount(devvp, accessmode, l->l_cred); 384 VOP_UNLOCK(devvp); 385 if (error) { 386 vrele(devvp); 387 return error; 388 } 389 390 /* 391 * Open device and try to mount it! 392 */ 393 if (mp->mnt_flag & MNT_RDONLY) { 394 openflags = FREAD; 395 } else { 396 openflags = FREAD | FWRITE; 397 } 398 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 399 error = VOP_OPEN(devvp, openflags, FSCRED); 400 VOP_UNLOCK(devvp); 401 if (error == 0) { 402 /* opened ok, try mounting */ 403 error = udf_mountfs(devvp, mp, l, args); 404 if (error) { 405 udf_release_system_nodes(mp); 406 /* cleanup */ 407 udf_discstrat_finish(VFSTOUDF(mp)); 408 free_udf_mountinfo(mp); 409 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 410 (void) VOP_CLOSE(devvp, openflags, NOCRED); 411 VOP_UNLOCK(devvp); 412 } 413 } 414 if (error) { 415 /* devvp is still locked */ 416 vrele(devvp); 417 return error; 418 } 419 420 /* register our mountpoint being on this device */ 421 devvp->v_specmountpoint = mp; 422 423 /* successfully mounted */ 424 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 425 426 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 427 mp->mnt_op->vfs_name, mp, l); 428 if (error) 429 return error; 430 431 /* If we're not opened read-only, open its logical volume */ 432 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 433 if ((error = udf_open_logvol(VFSTOUDF(mp))) != 0) { 434 printf( "mount_udf: can't open logical volume for " 435 "writing, downgrading access to read-only\n"); 436 mp->mnt_flag |= MNT_RDONLY; 437 /* FIXME we can't return error now on open failure */ 438 return 0; 439 } 440 } 441 442 return 0; 443 } 444 445 /* --------------------------------------------------------------------- */ 446 447 #ifdef DEBUG 448 static void 449 udf_unmount_sanity_check(struct mount *mp) 450 { 451 struct vnode *vp; 452 453 printf("On unmount, i found the following nodes:\n"); 454 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 455 vprint("", vp); 456 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 457 printf(" is locked\n"); 458 } 459 if (vp->v_usecount > 1) 460 printf(" more than one usecount %d\n", vp->v_usecount); 461 } 462 } 463 #endif 464 465 466 int 467 udf_unmount(struct mount *mp, int mntflags) 468 { 469 struct udf_mount *ump; 470 int error, flags, closeflags; 471 472 DPRINTF(CALL, ("udf_umount called\n")); 473 474 ump = VFSTOUDF(mp); 475 if (!ump) 476 panic("UDF unmount: empty ump\n"); 477 478 flags = (mntflags & MNT_FORCE) ? FORCECLOSE : 0; 479 /* TODO remove these paranoid functions */ 480 #ifdef DEBUG 481 if (udf_verbose & UDF_DEBUG_LOCKING) 482 udf_unmount_sanity_check(mp); 483 #endif 484 485 /* 486 * By specifying SKIPSYSTEM we can skip vnodes marked with VV_SYSTEM. 487 * This hardly documented feature allows us to exempt certain files 488 * from being flushed. 489 */ 490 if ((error = vflush(mp, NULLVP, flags | SKIPSYSTEM)) != 0) 491 return error; 492 493 /* update nodes and wait for completion of writeout of system nodes */ 494 udf_sync(mp, FSYNC_WAIT, NOCRED); 495 496 #ifdef DEBUG 497 if (udf_verbose & UDF_DEBUG_LOCKING) 498 udf_unmount_sanity_check(mp); 499 #endif 500 501 /* flush again, to check if we are still busy for something else */ 502 if ((error = vflush(ump->vfs_mountp, NULLVP, flags | SKIPSYSTEM)) != 0) 503 return error; 504 505 DPRINTF(VOLUMES, ("flush OK on unmount\n")); 506 507 /* close logical volume and close session if requested */ 508 if ((error = udf_close_logvol(ump, mntflags)) != 0) 509 return error; 510 511 #ifdef DEBUG 512 DPRINTF(VOLUMES, ("FINAL sanity check\n")); 513 if (udf_verbose & UDF_DEBUG_LOCKING) 514 udf_unmount_sanity_check(mp); 515 #endif 516 517 /* NOTE release system nodes should NOT write anything */ 518 udf_release_system_nodes(mp); 519 520 /* finalise disc strategy */ 521 udf_discstrat_finish(ump); 522 523 /* synchronise device caches */ 524 (void) udf_synchronise_caches(ump); 525 526 /* close device */ 527 DPRINTF(VOLUMES, ("closing device\n")); 528 if (mp->mnt_flag & MNT_RDONLY) { 529 closeflags = FREAD; 530 } else { 531 closeflags = FREAD | FWRITE; 532 } 533 534 /* devvp is still locked by us */ 535 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 536 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED); 537 if (error) 538 printf("Error during closure of device! error %d, " 539 "device might stay locked\n", error); 540 DPRINTF(VOLUMES, ("device close ok\n")); 541 542 /* clear our mount reference and release device node */ 543 ump->devvp->v_specmountpoint = NULL; 544 vput(ump->devvp); 545 546 /* free our ump */ 547 free_udf_mountinfo(mp); 548 549 /* free ump struct references */ 550 mp->mnt_data = NULL; 551 mp->mnt_flag &= ~MNT_LOCAL; 552 553 DPRINTF(VOLUMES, ("Fin unmount\n")); 554 return error; 555 } 556 557 /* --------------------------------------------------------------------- */ 558 559 /* 560 * Helper function of udf_mount() that actually mounts the disc. 561 */ 562 563 static int 564 udf_mountfs(struct vnode *devvp, struct mount *mp, 565 struct lwp *l, struct udf_args *args) 566 { 567 struct udf_mount *ump; 568 uint32_t sector_size, lb_size, bshift; 569 uint32_t logvol_integrity; 570 int num_anchors, error; 571 572 /* flush out any old buffers remaining from a previous use. */ 573 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0))) 574 return error; 575 576 /* setup basic mount information */ 577 mp->mnt_data = NULL; 578 mp->mnt_stat.f_fsidx.__fsid_val[0] = (uint32_t) devvp->v_rdev; 579 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_UDF); 580 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 581 mp->mnt_stat.f_namemax = UDF_MAXNAMLEN; 582 mp->mnt_flag |= MNT_LOCAL; 583 // mp->mnt_iflag |= IMNT_MPSAFE; 584 585 /* allocate udf part of mount structure; malloc always succeeds */ 586 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK | M_ZERO); 587 588 /* init locks */ 589 mutex_init(&ump->logvol_mutex, MUTEX_DEFAULT, IPL_NONE); 590 mutex_init(&ump->ihash_lock, MUTEX_DEFAULT, IPL_NONE); 591 mutex_init(&ump->get_node_lock, MUTEX_DEFAULT, IPL_NONE); 592 mutex_init(&ump->allocate_mutex, MUTEX_DEFAULT, IPL_NONE); 593 cv_init(&ump->dirtynodes_cv, "udfsync2"); 594 595 /* init rbtree for nodes, ordered by their icb address (long_ad) */ 596 udf_init_nodes_tree(ump); 597 598 /* set up linkage */ 599 mp->mnt_data = ump; 600 ump->vfs_mountp = mp; 601 602 /* set up arguments and device */ 603 ump->mount_args = *args; 604 ump->devvp = devvp; 605 if ((error = udf_update_discinfo(ump))) { 606 printf("UDF mount: error inspecting fs node\n"); 607 return error; 608 } 609 610 /* inspect sector size */ 611 sector_size = ump->discinfo.sector_size; 612 bshift = 1; 613 while ((1 << bshift) < sector_size) 614 bshift++; 615 if ((1 << bshift) != sector_size) { 616 printf("UDF mount: " 617 "hit NetBSD implementation fence on sector size\n"); 618 return EIO; 619 } 620 621 /* temporary check to overcome sectorsize >= 8192 bytes panic */ 622 if (sector_size >= 8192) { 623 printf("UDF mount: " 624 "hit implementation limit, sectorsize to big\n"); 625 return EIO; 626 } 627 628 /* 629 * Inspect if we're asked to mount read-write on a non recordable or 630 * closed sequential disc. 631 */ 632 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 633 if ((ump->discinfo.mmc_cur & MMC_CAP_RECORDABLE) == 0) { 634 printf("UDF mount: disc is not recordable\n"); 635 return EROFS; 636 } 637 if (ump->discinfo.mmc_cur & MMC_CAP_SEQUENTIAL) { 638 if (ump->discinfo.disc_state == MMC_STATE_FULL) { 639 printf("UDF mount: disc is not appendable\n"); 640 return EROFS; 641 } 642 643 /* 644 * TODO if the last session is closed check if there 645 * is enough space to open/close new session 646 */ 647 } 648 /* double check if we're not mounting a pervious session RW */ 649 if (args->sessionnr != 0) { 650 printf("UDF mount: updating a previous session " 651 "not yet allowed\n"); 652 return EROFS; 653 } 654 } 655 656 /* initialise bootstrap disc strategy */ 657 ump->strategy = &udf_strat_bootstrap; 658 udf_discstrat_init(ump); 659 660 /* read all anchors to get volume descriptor sequence */ 661 num_anchors = udf_read_anchors(ump); 662 if (num_anchors == 0) 663 return EINVAL; 664 665 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 666 num_anchors, args->sessionnr)); 667 668 /* read in volume descriptor sequence */ 669 if ((error = udf_read_vds_space(ump))) { 670 printf("UDF mount: error reading volume space\n"); 671 return error; 672 } 673 674 /* close down bootstrap disc strategy */ 675 udf_discstrat_finish(ump); 676 677 /* check consistency and completeness */ 678 if ((error = udf_process_vds(ump))) { 679 printf( "UDF mount: disc not properly formatted" 680 "(bad VDS)\n"); 681 return error; 682 } 683 684 /* switch to new disc strategy */ 685 KASSERT(ump->strategy != &udf_strat_bootstrap); 686 udf_discstrat_init(ump); 687 688 /* initialise late allocation administration space */ 689 ump->la_lmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 690 M_TEMP, M_WAITOK); 691 ump->la_pmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 692 M_TEMP, M_WAITOK); 693 694 /* setup node cleanup extents copy space */ 695 lb_size = udf_rw32(ump->logical_vol->lb_size); 696 ump->la_node_ad_cpy = malloc(lb_size * UDF_MAX_ALLOC_EXTENTS, 697 M_UDFMNT, M_WAITOK); 698 memset(ump->la_node_ad_cpy, 0, lb_size * UDF_MAX_ALLOC_EXTENTS); 699 700 /* setup rest of mount information */ 701 mp->mnt_data = ump; 702 703 /* bshift is allways equal to disc sector size */ 704 mp->mnt_dev_bshift = bshift; 705 mp->mnt_fs_bshift = bshift; 706 707 /* note that the mp info needs to be initialised for reading! */ 708 /* read vds support tables like VAT, sparable etc. */ 709 if ((error = udf_read_vds_tables(ump))) { 710 printf( "UDF mount: error in format or damaged disc " 711 "(VDS tables failing)\n"); 712 return error; 713 } 714 715 /* check if volume integrity is closed otherwise its dirty */ 716 logvol_integrity = udf_rw32(ump->logvol_integrity->integrity_type); 717 if (logvol_integrity != UDF_INTEGRITY_CLOSED) { 718 printf("UDF mount: file system is not clean; "); 719 printf("please fsck(8)\n"); 720 return EPERM; 721 } 722 723 /* read root directory */ 724 if ((error = udf_read_rootdirs(ump))) { 725 printf( "UDF mount: " 726 "disc not properly formatted or damaged disc " 727 "(rootdirs failing)\n"); 728 return error; 729 } 730 731 /* do we have to set this? */ 732 devvp->v_specmountpoint = mp; 733 734 /* success! */ 735 return 0; 736 } 737 738 /* --------------------------------------------------------------------- */ 739 740 int 741 udf_start(struct mount *mp, int flags) 742 { 743 /* do we have to do something here? */ 744 return 0; 745 } 746 747 /* --------------------------------------------------------------------- */ 748 749 int 750 udf_root(struct mount *mp, struct vnode **vpp) 751 { 752 struct vnode *vp; 753 struct long_ad *dir_loc; 754 struct udf_mount *ump = VFSTOUDF(mp); 755 struct udf_node *root_dir; 756 int error; 757 758 DPRINTF(CALL, ("udf_root called\n")); 759 760 dir_loc = &ump->fileset_desc->rootdir_icb; 761 error = udf_get_node(ump, dir_loc, &root_dir); 762 763 if (!root_dir) 764 error = ENOENT; 765 if (error) 766 return error; 767 768 vp = root_dir->vnode; 769 KASSERT(vp->v_vflag & VV_ROOT); 770 771 *vpp = vp; 772 return 0; 773 } 774 775 /* --------------------------------------------------------------------- */ 776 777 int 778 udf_statvfs(struct mount *mp, struct statvfs *sbp) 779 { 780 struct udf_mount *ump = VFSTOUDF(mp); 781 struct logvol_int_desc *lvid; 782 struct udf_logvol_info *impl; 783 uint64_t freeblks, sizeblks; 784 int num_part; 785 786 DPRINTF(CALL, ("udf_statvfs called\n")); 787 sbp->f_flag = mp->mnt_flag; 788 sbp->f_bsize = ump->discinfo.sector_size; 789 sbp->f_frsize = ump->discinfo.sector_size; 790 sbp->f_iosize = ump->discinfo.sector_size; 791 792 mutex_enter(&ump->allocate_mutex); 793 794 udf_calc_freespace(ump, &sizeblks, &freeblks); 795 796 sbp->f_blocks = sizeblks; 797 sbp->f_bfree = freeblks; 798 sbp->f_files = 0; 799 800 lvid = ump->logvol_integrity; 801 num_part = udf_rw32(lvid->num_part); 802 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 803 if (impl) { 804 sbp->f_files = udf_rw32(impl->num_files); 805 sbp->f_files += udf_rw32(impl->num_directories); 806 } 807 808 /* XXX read only for now XXX */ 809 sbp->f_bavail = 0; 810 sbp->f_bresvd = 0; 811 812 /* tricky, next only aplies to ffs i think, so set to zero */ 813 sbp->f_ffree = 0; 814 sbp->f_favail = 0; 815 sbp->f_fresvd = 0; 816 817 mutex_exit(&ump->allocate_mutex); 818 819 copy_statvfs_info(sbp, mp); 820 return 0; 821 } 822 823 /* --------------------------------------------------------------------- */ 824 825 /* 826 * TODO what about writing out free space maps, lvid etc? only on `waitfor' 827 * i.e. explicit syncing by the user? 828 */ 829 830 static int 831 udf_sync_writeout_system_files(struct udf_mount *ump, int clearflags) 832 { 833 int error; 834 835 /* XXX lock for VAT en bitmaps? */ 836 /* metadata nodes are written synchronous */ 837 DPRINTF(CALL, ("udf_sync: syncing metadata\n")); 838 if (ump->lvclose & UDF_WRITE_VAT) 839 udf_writeout_vat(ump); 840 841 error = 0; 842 if (ump->lvclose & UDF_WRITE_PART_BITMAPS) { 843 /* writeout metadata spacetable if existing */ 844 error = udf_write_metadata_partition_spacetable(ump, MNT_WAIT); 845 if (error) 846 printf( "udf_writeout_system_files : " 847 " writeout of metadata space bitmap failed\n"); 848 849 /* writeout partition spacetables */ 850 error = udf_write_physical_partition_spacetables(ump, MNT_WAIT); 851 if (error) 852 printf( "udf_writeout_system_files : " 853 "writeout of space tables failed\n"); 854 if (!error && clearflags) 855 ump->lvclose &= ~UDF_WRITE_PART_BITMAPS; 856 } 857 858 return error; 859 } 860 861 862 int 863 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 864 { 865 struct udf_mount *ump = VFSTOUDF(mp); 866 867 DPRINTF(CALL, ("udf_sync called\n")); 868 /* if called when mounted readonly, just ignore */ 869 if (mp->mnt_flag & MNT_RDONLY) 870 return 0; 871 872 if (ump->syncing && !waitfor) { 873 printf("UDF: skipping autosync\n"); 874 return 0; 875 } 876 877 /* get sync lock */ 878 ump->syncing = 1; 879 880 /* pre-sync */ 881 udf_do_sync(ump, cred, waitfor); 882 883 if (waitfor == MNT_WAIT) 884 udf_sync_writeout_system_files(ump, true); 885 886 DPRINTF(CALL, ("end of udf_sync()\n")); 887 ump->syncing = 0; 888 889 return 0; 890 } 891 892 /* --------------------------------------------------------------------- */ 893 894 /* 895 * Get vnode for the file system type specific file id ino for the fs. Its 896 * used for reference to files by unique ID and for NFSv3. 897 * (optional) TODO lookup why some sources state NFSv3 898 */ 899 int 900 udf_vget(struct mount *mp, ino_t ino, 901 struct vnode **vpp) 902 { 903 DPRINTF(NOTIMPL, ("udf_vget called\n")); 904 return EOPNOTSUPP; 905 } 906 907 /* --------------------------------------------------------------------- */ 908 909 /* 910 * Lookup vnode for file handle specified 911 */ 912 int 913 udf_fhtovp(struct mount *mp, struct fid *fhp, 914 struct vnode **vpp) 915 { 916 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 917 return EOPNOTSUPP; 918 } 919 920 /* --------------------------------------------------------------------- */ 921 922 /* 923 * Create an unique file handle. Its structure is opaque and won't be used by 924 * other subsystems. It should uniquely identify the file in the filingsystem 925 * and enough information to know if a file has been removed and/or resources 926 * have been recycled. 927 */ 928 int 929 udf_vptofh(struct vnode *vp, struct fid *fid, 930 size_t *fh_size) 931 { 932 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 933 return EOPNOTSUPP; 934 } 935 936 /* --------------------------------------------------------------------- */ 937 938 /* 939 * Create a filingsystem snapshot at the specified timestamp. Could be 940 * implemented by explicitly creating a new session or with spare room in the 941 * integrity descriptor space 942 */ 943 int 944 udf_snapshot(struct mount *mp, struct vnode *vp, 945 struct timespec *tm) 946 { 947 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 948 return EOPNOTSUPP; 949 } 950 951 /* --------------------------------------------------------------------- */ 952