1 /* $NetBSD: udf_vfsops.c,v 1.71 2015/08/24 08:31:56 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 1.71 2015/08/24 08:31:56 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 static struct sysctllog *udf_sysctl_log; 83 84 /* internal functions */ 85 static int udf_mountfs(struct vnode *, struct mount *, struct lwp *, struct udf_args *); 86 87 88 /* --------------------------------------------------------------------- */ 89 90 /* predefine vnode-op list descriptor */ 91 extern const struct vnodeopv_desc udf_vnodeop_opv_desc; 92 93 const struct vnodeopv_desc * const udf_vnodeopv_descs[] = { 94 &udf_vnodeop_opv_desc, 95 NULL, 96 }; 97 98 99 /* vfsops descriptor linked in as anchor point for the filingsystem */ 100 struct vfsops udf_vfsops = { 101 .vfs_name = MOUNT_UDF, 102 .vfs_min_mount_data = sizeof (struct udf_args), 103 .vfs_mount = udf_mount, 104 .vfs_start = udf_start, 105 .vfs_unmount = udf_unmount, 106 .vfs_root = udf_root, 107 .vfs_quotactl = (void *)eopnotsupp, 108 .vfs_statvfs = udf_statvfs, 109 .vfs_sync = udf_sync, 110 .vfs_vget = udf_vget, 111 .vfs_loadvnode = udf_loadvnode, 112 .vfs_newvnode = udf_newvnode, 113 .vfs_fhtovp = udf_fhtovp, 114 .vfs_vptofh = udf_vptofh, 115 .vfs_init = udf_init, 116 .vfs_reinit = udf_reinit, 117 .vfs_done = udf_done, 118 .vfs_mountroot = udf_mountroot, 119 .vfs_snapshot = udf_snapshot, 120 .vfs_extattrctl = vfs_stdextattrctl, 121 .vfs_suspendctl = (void *)eopnotsupp, 122 .vfs_renamelock_enter = genfs_renamelock_enter, 123 .vfs_renamelock_exit = genfs_renamelock_exit, 124 .vfs_fsync = (void *)eopnotsupp, 125 .vfs_opv_descs = udf_vnodeopv_descs 126 }; 127 128 /* --------------------------------------------------------------------- */ 129 130 /* file system starts here */ 131 void 132 udf_init(void) 133 { 134 size_t size; 135 136 /* setup memory types */ 137 malloc_type_attach(M_UDFMNT); 138 malloc_type_attach(M_UDFVOLD); 139 malloc_type_attach(M_UDFTEMP); 140 141 /* init node pools */ 142 size = sizeof(struct udf_node); 143 pool_init(&udf_node_pool, size, 0, 0, 0, 144 "udf_node_pool", NULL, IPL_NONE); 145 } 146 147 148 void 149 udf_reinit(void) 150 { 151 /* nothing to do */ 152 } 153 154 155 void 156 udf_done(void) 157 { 158 /* remove pools */ 159 pool_destroy(&udf_node_pool); 160 161 malloc_type_detach(M_UDFMNT); 162 malloc_type_detach(M_UDFVOLD); 163 malloc_type_detach(M_UDFTEMP); 164 } 165 166 /* 167 * If running a DEBUG kernel, provide an easy way to set the debug flags when 168 * running into a problem. 169 */ 170 #define UDF_VERBOSE_SYSCTLOPT 1 171 172 static int 173 udf_modcmd(modcmd_t cmd, void *arg) 174 { 175 const struct sysctlnode *node; 176 int error; 177 178 switch (cmd) { 179 case MODULE_CMD_INIT: 180 error = vfs_attach(&udf_vfsops); 181 if (error != 0) 182 break; 183 /* 184 * XXX the "24" below could be dynamic, thereby eliminating one 185 * more instance of the "number to vfs" mapping problem, but 186 * "24" is the order as taken from sys/mount.h 187 */ 188 sysctl_createv(&udf_sysctl_log, 0, NULL, &node, 189 CTLFLAG_PERMANENT, 190 CTLTYPE_NODE, "udf", 191 SYSCTL_DESCR("OSTA Universal File System"), 192 NULL, 0, NULL, 0, 193 CTL_VFS, 24, CTL_EOL); 194 #ifdef DEBUG 195 sysctl_createv(&udf_sysctl_log, 0, NULL, &node, 196 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 197 CTLTYPE_INT, "verbose", 198 SYSCTL_DESCR("Bitmask for filesystem debugging"), 199 NULL, 0, &udf_verbose, 0, 200 CTL_VFS, 24, UDF_VERBOSE_SYSCTLOPT, CTL_EOL); 201 #endif 202 break; 203 case MODULE_CMD_FINI: 204 error = vfs_detach(&udf_vfsops); 205 if (error != 0) 206 break; 207 sysctl_teardown(&udf_sysctl_log); 208 break; 209 default: 210 error = ENOTTY; 211 break; 212 } 213 214 return (error); 215 } 216 217 /* --------------------------------------------------------------------- */ 218 219 int 220 udf_mountroot(void) 221 { 222 return EOPNOTSUPP; 223 } 224 225 /* --------------------------------------------------------------------- */ 226 227 #define MPFREE(a, lst) \ 228 if ((a)) free((a), lst); 229 static void 230 free_udf_mountinfo(struct mount *mp) 231 { 232 struct udf_mount *ump; 233 int i; 234 235 if (!mp) 236 return; 237 238 ump = VFSTOUDF(mp); 239 if (ump) { 240 /* clear our data */ 241 for (i = 0; i < UDF_ANCHORS; i++) 242 MPFREE(ump->anchors[i], M_UDFVOLD); 243 MPFREE(ump->primary_vol, M_UDFVOLD); 244 MPFREE(ump->logical_vol, M_UDFVOLD); 245 MPFREE(ump->unallocated, M_UDFVOLD); 246 MPFREE(ump->implementation, M_UDFVOLD); 247 MPFREE(ump->logvol_integrity, M_UDFVOLD); 248 for (i = 0; i < UDF_PARTITIONS; i++) { 249 MPFREE(ump->partitions[i], M_UDFVOLD); 250 MPFREE(ump->part_unalloc_dscr[i], M_UDFVOLD); 251 MPFREE(ump->part_freed_dscr[i], M_UDFVOLD); 252 } 253 MPFREE(ump->metadata_unalloc_dscr, M_UDFVOLD); 254 255 MPFREE(ump->fileset_desc, M_UDFVOLD); 256 MPFREE(ump->sparing_table, M_UDFVOLD); 257 258 MPFREE(ump->la_node_ad_cpy, M_UDFMNT); 259 MPFREE(ump->la_pmapping, M_TEMP); 260 MPFREE(ump->la_lmapping, M_TEMP); 261 262 mutex_destroy(&ump->logvol_mutex); 263 mutex_destroy(&ump->allocate_mutex); 264 mutex_destroy(&ump->sync_lock); 265 266 MPFREE(ump->vat_table, M_UDFVOLD); 267 268 free(ump, M_UDFMNT); 269 } 270 } 271 #undef MPFREE 272 273 /* --------------------------------------------------------------------- */ 274 275 /* if the system nodes exist, release them */ 276 static void 277 udf_release_system_nodes(struct mount *mp) 278 { 279 struct udf_mount *ump = VFSTOUDF(mp); 280 int error; 281 282 /* if we haven't even got an ump, dont bother */ 283 if (!ump) 284 return; 285 286 /* VAT partition support */ 287 if (ump->vat_node) 288 vrele(ump->vat_node->vnode); 289 290 /* Metadata partition support */ 291 if (ump->metadata_node) 292 vrele(ump->metadata_node->vnode); 293 if (ump->metadatamirror_node) 294 vrele(ump->metadatamirror_node->vnode); 295 if (ump->metadatabitmap_node) 296 vrele(ump->metadatabitmap_node->vnode); 297 298 /* This flush should NOT write anything nor allow any node to remain */ 299 if ((error = vflush(ump->vfs_mountp, NULLVP, 0)) != 0) 300 panic("Failure to flush UDF system vnodes\n"); 301 } 302 303 304 int 305 udf_mount(struct mount *mp, const char *path, 306 void *data, size_t *data_len) 307 { 308 struct lwp *l = curlwp; 309 struct udf_args *args = data; 310 struct udf_mount *ump; 311 struct vnode *devvp; 312 int openflags, accessmode, error; 313 314 DPRINTF(CALL, ("udf_mount called\n")); 315 316 if (args == NULL) 317 return EINVAL; 318 if (*data_len < sizeof *args) 319 return EINVAL; 320 321 if (mp->mnt_flag & MNT_GETARGS) { 322 /* request for the mount arguments */ 323 ump = VFSTOUDF(mp); 324 if (ump == NULL) 325 return EINVAL; 326 *args = ump->mount_args; 327 *data_len = sizeof *args; 328 return 0; 329 } 330 331 /* handle request for updating mount parameters */ 332 /* TODO can't update my mountpoint yet */ 333 if (mp->mnt_flag & MNT_UPDATE) { 334 return EOPNOTSUPP; 335 } 336 337 /* OK, so we are asked to mount the device */ 338 339 /* check/translate struct version */ 340 /* TODO sanity checking other mount arguments */ 341 if (args->version != 1) { 342 printf("mount_udf: unrecognized argument structure version\n"); 343 return EINVAL; 344 } 345 346 /* lookup name to get its vnode */ 347 error = namei_simple_user(args->fspec, 348 NSM_FOLLOW_NOEMULROOT, &devvp); 349 if (error) 350 return error; 351 352 #ifdef DEBUG 353 if (udf_verbose & UDF_DEBUG_VOLUMES) 354 vprint("UDF mount, trying to mount \n", devvp); 355 #endif 356 357 /* check if its a block device specified */ 358 if (devvp->v_type != VBLK) { 359 vrele(devvp); 360 return ENOTBLK; 361 } 362 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 363 vrele(devvp); 364 return ENXIO; 365 } 366 367 /* 368 * If mount by non-root, then verify that user has necessary 369 * permissions on the device. 370 */ 371 accessmode = VREAD; 372 if ((mp->mnt_flag & MNT_RDONLY) == 0) 373 accessmode |= VWRITE; 374 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 375 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 376 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 377 VOP_UNLOCK(devvp); 378 if (error) { 379 vrele(devvp); 380 return error; 381 } 382 383 /* 384 * Open device and try to mount it! 385 */ 386 if (mp->mnt_flag & MNT_RDONLY) { 387 openflags = FREAD; 388 } else { 389 openflags = FREAD | FWRITE; 390 } 391 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 392 error = VOP_OPEN(devvp, openflags, FSCRED); 393 VOP_UNLOCK(devvp); 394 if (error == 0) { 395 /* opened ok, try mounting */ 396 error = udf_mountfs(devvp, mp, l, args); 397 if (error) { 398 udf_release_system_nodes(mp); 399 /* cleanup */ 400 udf_discstrat_finish(VFSTOUDF(mp)); 401 free_udf_mountinfo(mp); 402 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 403 (void) VOP_CLOSE(devvp, openflags, NOCRED); 404 VOP_UNLOCK(devvp); 405 } 406 } 407 if (error) { 408 /* devvp is still locked */ 409 vrele(devvp); 410 return error; 411 } 412 413 /* register our mountpoint being on this device */ 414 spec_node_setmountedfs(devvp, mp); 415 416 /* successfully mounted */ 417 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 418 419 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 420 mp->mnt_op->vfs_name, mp, l); 421 if (error) 422 return error; 423 424 /* If we're not opened read-only, open its logical volume */ 425 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 426 if ((error = udf_open_logvol(VFSTOUDF(mp))) != 0) { 427 printf( "mount_udf: can't open logical volume for " 428 "writing, downgrading access to read-only\n"); 429 mp->mnt_flag |= MNT_RDONLY; 430 /* FIXME we can't return error now on open failure */ 431 return 0; 432 } 433 } 434 435 return 0; 436 } 437 438 /* --------------------------------------------------------------------- */ 439 440 #ifdef DEBUG 441 static bool 442 udf_sanity_selector(void *cl, struct vnode *vp) 443 { 444 445 vprint("", vp); 446 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 447 printf(" is locked\n"); 448 } 449 if (vp->v_usecount > 1) 450 printf(" more than one usecount %d\n", vp->v_usecount); 451 return false; 452 } 453 454 static void 455 udf_unmount_sanity_check(struct mount *mp) 456 { 457 struct vnode_iterator *marker; 458 459 printf("On unmount, i found the following nodes:\n"); 460 vfs_vnode_iterator_init(mp, &marker); 461 vfs_vnode_iterator_next(marker, udf_sanity_selector, NULL); 462 vfs_vnode_iterator_destroy(marker); 463 } 464 #endif 465 466 467 int 468 udf_unmount(struct mount *mp, int mntflags) 469 { 470 struct udf_mount *ump; 471 int error, flags, closeflags; 472 473 DPRINTF(CALL, ("udf_umount called\n")); 474 475 ump = VFSTOUDF(mp); 476 if (!ump) 477 panic("UDF unmount: empty ump\n"); 478 479 flags = (mntflags & MNT_FORCE) ? FORCECLOSE : 0; 480 /* TODO remove these paranoid functions */ 481 #ifdef DEBUG 482 if (udf_verbose & UDF_DEBUG_LOCKING) 483 udf_unmount_sanity_check(mp); 484 #endif 485 486 /* 487 * By specifying SKIPSYSTEM we can skip vnodes marked with VV_SYSTEM. 488 * This hardly documented feature allows us to exempt certain files 489 * from being flushed. 490 */ 491 if ((error = vflush(mp, NULLVP, flags | SKIPSYSTEM)) != 0) 492 return error; 493 494 /* update nodes and wait for completion of writeout of system nodes */ 495 udf_sync(mp, FSYNC_WAIT, NOCRED); 496 497 #ifdef DEBUG 498 if (udf_verbose & UDF_DEBUG_LOCKING) 499 udf_unmount_sanity_check(mp); 500 #endif 501 502 /* flush again, to check if we are still busy for something else */ 503 if ((error = vflush(ump->vfs_mountp, NULLVP, flags | SKIPSYSTEM)) != 0) 504 return error; 505 506 DPRINTF(VOLUMES, ("flush OK on unmount\n")); 507 508 /* close logical volume and close session if requested */ 509 if ((error = udf_close_logvol(ump, mntflags)) != 0) 510 return error; 511 512 #ifdef DEBUG 513 DPRINTF(VOLUMES, ("FINAL sanity check\n")); 514 if (udf_verbose & UDF_DEBUG_LOCKING) 515 udf_unmount_sanity_check(mp); 516 #endif 517 518 /* NOTE release system nodes should NOT write anything */ 519 udf_release_system_nodes(mp); 520 521 /* finalise disc strategy */ 522 udf_discstrat_finish(ump); 523 524 /* synchronise device caches */ 525 (void) udf_synchronise_caches(ump); 526 527 /* close device */ 528 DPRINTF(VOLUMES, ("closing device\n")); 529 if (mp->mnt_flag & MNT_RDONLY) { 530 closeflags = FREAD; 531 } else { 532 closeflags = FREAD | FWRITE; 533 } 534 535 /* devvp is still locked by us */ 536 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 537 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED); 538 if (error) 539 printf("Error during closure of device! error %d, " 540 "device might stay locked\n", error); 541 DPRINTF(VOLUMES, ("device close ok\n")); 542 543 /* clear our mount reference and release device node */ 544 spec_node_setmountedfs(ump->devvp, NULL); 545 vput(ump->devvp); 546 547 /* free our ump */ 548 free_udf_mountinfo(mp); 549 550 /* free ump struct references */ 551 mp->mnt_data = NULL; 552 mp->mnt_flag &= ~MNT_LOCAL; 553 554 DPRINTF(VOLUMES, ("Fin unmount\n")); 555 return error; 556 } 557 558 /* --------------------------------------------------------------------- */ 559 560 /* 561 * Helper function of udf_mount() that actually mounts the disc. 562 */ 563 564 static int 565 udf_mountfs(struct vnode *devvp, struct mount *mp, 566 struct lwp *l, struct udf_args *args) 567 { 568 struct udf_mount *ump; 569 uint32_t sector_size, lb_size, bshift; 570 uint32_t logvol_integrity; 571 int num_anchors, error; 572 573 /* flush out any old buffers remaining from a previous use. */ 574 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0))) 575 return error; 576 577 /* setup basic mount information */ 578 mp->mnt_data = NULL; 579 mp->mnt_stat.f_fsidx.__fsid_val[0] = (uint32_t) devvp->v_rdev; 580 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_UDF); 581 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 582 mp->mnt_stat.f_namemax = UDF_MAXNAMLEN; 583 mp->mnt_flag |= MNT_LOCAL; 584 // mp->mnt_iflag |= IMNT_MPSAFE; 585 586 /* allocate udf part of mount structure; malloc always succeeds */ 587 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK | M_ZERO); 588 589 /* init locks */ 590 mutex_init(&ump->logvol_mutex, MUTEX_DEFAULT, IPL_NONE); 591 mutex_init(&ump->allocate_mutex, MUTEX_DEFAULT, IPL_NONE); 592 mutex_init(&ump->sync_lock, MUTEX_DEFAULT, IPL_NONE); 593 594 /* init rbtree for nodes, ordered by their icb address (long_ad) */ 595 udf_init_nodes_tree(ump); 596 597 /* set up linkage */ 598 mp->mnt_data = ump; 599 ump->vfs_mountp = mp; 600 601 /* set up arguments and device */ 602 ump->mount_args = *args; 603 ump->devvp = devvp; 604 if ((error = udf_update_discinfo(ump))) { 605 printf("UDF mount: error inspecting fs node\n"); 606 return error; 607 } 608 609 /* inspect sector size */ 610 sector_size = ump->discinfo.sector_size; 611 bshift = 1; 612 while ((1 << bshift) < sector_size) 613 bshift++; 614 if ((1 << bshift) != sector_size) { 615 printf("UDF mount: " 616 "hit NetBSD implementation fence on sector size\n"); 617 return EIO; 618 } 619 620 /* temporary check to overcome sectorsize >= 8192 bytes panic */ 621 if (sector_size >= 8192) { 622 printf("UDF mount: " 623 "hit implementation limit, sectorsize to big\n"); 624 return EIO; 625 } 626 627 /* 628 * Inspect if we're asked to mount read-write on a non recordable or 629 * closed sequential disc. 630 */ 631 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 632 if ((ump->discinfo.mmc_cur & MMC_CAP_RECORDABLE) == 0) { 633 printf("UDF mount: disc is not recordable\n"); 634 return EROFS; 635 } 636 if (ump->discinfo.mmc_cur & MMC_CAP_SEQUENTIAL) { 637 if (ump->discinfo.disc_state == MMC_STATE_FULL) { 638 printf("UDF mount: disc is not appendable\n"); 639 return EROFS; 640 } 641 642 /* 643 * TODO if the last session is closed check if there 644 * is enough space to open/close new session 645 */ 646 } 647 /* double check if we're not mounting a pervious session RW */ 648 if (args->sessionnr != 0) { 649 printf("UDF mount: updating a previous session " 650 "not yet allowed\n"); 651 return EROFS; 652 } 653 } 654 655 /* initialise bootstrap disc strategy */ 656 ump->strategy = &udf_strat_bootstrap; 657 udf_discstrat_init(ump); 658 659 /* read all anchors to get volume descriptor sequence */ 660 num_anchors = udf_read_anchors(ump); 661 if (num_anchors == 0) 662 return EINVAL; 663 664 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 665 num_anchors, args->sessionnr)); 666 667 /* read in volume descriptor sequence */ 668 if ((error = udf_read_vds_space(ump))) { 669 printf("UDF mount: error reading volume space\n"); 670 return error; 671 } 672 673 /* close down bootstrap disc strategy */ 674 udf_discstrat_finish(ump); 675 676 /* check consistency and completeness */ 677 if ((error = udf_process_vds(ump))) { 678 printf( "UDF mount: disc not properly formatted" 679 "(bad VDS)\n"); 680 return error; 681 } 682 683 /* switch to new disc strategy */ 684 KASSERT(ump->strategy != &udf_strat_bootstrap); 685 udf_discstrat_init(ump); 686 687 /* initialise late allocation administration space */ 688 ump->la_lmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 689 M_TEMP, M_WAITOK); 690 ump->la_pmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 691 M_TEMP, M_WAITOK); 692 693 /* setup node cleanup extents copy space */ 694 lb_size = udf_rw32(ump->logical_vol->lb_size); 695 ump->la_node_ad_cpy = malloc(lb_size * UDF_MAX_ALLOC_EXTENTS, 696 M_UDFMNT, M_WAITOK); 697 memset(ump->la_node_ad_cpy, 0, lb_size * UDF_MAX_ALLOC_EXTENTS); 698 699 /* setup rest of mount information */ 700 mp->mnt_data = ump; 701 702 /* bshift is allways equal to disc sector size */ 703 mp->mnt_dev_bshift = bshift; 704 mp->mnt_fs_bshift = bshift; 705 706 /* note that the mp info needs to be initialised for reading! */ 707 /* read vds support tables like VAT, sparable etc. */ 708 if ((error = udf_read_vds_tables(ump))) { 709 printf( "UDF mount: error in format or damaged disc " 710 "(VDS tables failing)\n"); 711 return error; 712 } 713 714 /* check if volume integrity is closed otherwise its dirty */ 715 logvol_integrity = udf_rw32(ump->logvol_integrity->integrity_type); 716 if (logvol_integrity != UDF_INTEGRITY_CLOSED) { 717 printf("UDF mount: file system is not clean; "); 718 printf("please fsck(8)\n"); 719 return EPERM; 720 } 721 722 /* read root directory */ 723 if ((error = udf_read_rootdirs(ump))) { 724 printf( "UDF mount: " 725 "disc not properly formatted or damaged disc " 726 "(rootdirs failing)\n"); 727 return error; 728 } 729 730 /* success! */ 731 return 0; 732 } 733 734 /* --------------------------------------------------------------------- */ 735 736 int 737 udf_start(struct mount *mp, int flags) 738 { 739 /* do we have to do something here? */ 740 return 0; 741 } 742 743 /* --------------------------------------------------------------------- */ 744 745 int 746 udf_root(struct mount *mp, struct vnode **vpp) 747 { 748 struct vnode *vp; 749 struct long_ad *dir_loc; 750 struct udf_mount *ump = VFSTOUDF(mp); 751 struct udf_node *root_dir; 752 int error; 753 754 DPRINTF(CALL, ("udf_root called\n")); 755 756 dir_loc = &ump->fileset_desc->rootdir_icb; 757 error = udf_get_node(ump, dir_loc, &root_dir); 758 759 if (!root_dir) 760 error = ENOENT; 761 if (error) 762 return error; 763 764 vp = root_dir->vnode; 765 KASSERT(vp->v_vflag & VV_ROOT); 766 767 *vpp = vp; 768 return 0; 769 } 770 771 /* --------------------------------------------------------------------- */ 772 773 int 774 udf_statvfs(struct mount *mp, struct statvfs *sbp) 775 { 776 struct udf_mount *ump = VFSTOUDF(mp); 777 struct logvol_int_desc *lvid; 778 struct udf_logvol_info *impl; 779 uint64_t freeblks, sizeblks; 780 int num_part; 781 782 DPRINTF(CALL, ("udf_statvfs called\n")); 783 sbp->f_flag = mp->mnt_flag; 784 sbp->f_bsize = ump->discinfo.sector_size; 785 sbp->f_frsize = ump->discinfo.sector_size; 786 sbp->f_iosize = ump->discinfo.sector_size; 787 788 mutex_enter(&ump->allocate_mutex); 789 790 udf_calc_freespace(ump, &sizeblks, &freeblks); 791 792 sbp->f_blocks = sizeblks; 793 sbp->f_bfree = freeblks; 794 sbp->f_files = 0; 795 796 lvid = ump->logvol_integrity; 797 num_part = udf_rw32(lvid->num_part); 798 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 799 if (impl) { 800 sbp->f_files = udf_rw32(impl->num_files); 801 sbp->f_files += udf_rw32(impl->num_directories); 802 } 803 804 /* XXX read only for now XXX */ 805 sbp->f_bavail = 0; 806 sbp->f_bresvd = 0; 807 808 /* tricky, next only aplies to ffs i think, so set to zero */ 809 sbp->f_ffree = 0; 810 sbp->f_favail = 0; 811 sbp->f_fresvd = 0; 812 813 mutex_exit(&ump->allocate_mutex); 814 815 copy_statvfs_info(sbp, mp); 816 return 0; 817 } 818 819 /* --------------------------------------------------------------------- */ 820 821 /* 822 * TODO what about writing out free space maps, lvid etc? only on `waitfor' 823 * i.e. explicit syncing by the user? 824 */ 825 826 static int 827 udf_sync_writeout_system_files(struct udf_mount *ump, int clearflags) 828 { 829 int error; 830 831 /* XXX lock for VAT en bitmaps? */ 832 /* metadata nodes are written synchronous */ 833 DPRINTF(CALL, ("udf_sync: syncing metadata\n")); 834 if (ump->lvclose & UDF_WRITE_VAT) 835 udf_writeout_vat(ump); 836 837 error = 0; 838 if (ump->lvclose & UDF_WRITE_PART_BITMAPS) { 839 /* writeout metadata spacetable if existing */ 840 error = udf_write_metadata_partition_spacetable(ump, MNT_WAIT); 841 if (error) 842 printf( "udf_writeout_system_files : " 843 " writeout of metadata space bitmap failed\n"); 844 845 /* writeout partition spacetables */ 846 error = udf_write_physical_partition_spacetables(ump, MNT_WAIT); 847 if (error) 848 printf( "udf_writeout_system_files : " 849 "writeout of space tables failed\n"); 850 if (!error && clearflags) 851 ump->lvclose &= ~UDF_WRITE_PART_BITMAPS; 852 } 853 854 return error; 855 } 856 857 858 int 859 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 860 { 861 struct udf_mount *ump = VFSTOUDF(mp); 862 863 DPRINTF(CALL, ("udf_sync called\n")); 864 /* if called when mounted readonly, just ignore */ 865 if (mp->mnt_flag & MNT_RDONLY) 866 return 0; 867 868 if (ump->syncing && !waitfor) { 869 printf("UDF: skipping autosync\n"); 870 return 0; 871 } 872 873 /* get sync lock */ 874 ump->syncing = 1; 875 876 /* pre-sync */ 877 udf_do_sync(ump, cred, waitfor); 878 879 if (waitfor == MNT_WAIT) 880 udf_sync_writeout_system_files(ump, true); 881 882 DPRINTF(CALL, ("end of udf_sync()\n")); 883 ump->syncing = 0; 884 885 return 0; 886 } 887 888 /* --------------------------------------------------------------------- */ 889 890 /* 891 * Get vnode for the file system type specific file id ino for the fs. Its 892 * used for reference to files by unique ID and for NFSv3. 893 * (optional) TODO lookup why some sources state NFSv3 894 */ 895 int 896 udf_vget(struct mount *mp, ino_t ino, 897 struct vnode **vpp) 898 { 899 DPRINTF(NOTIMPL, ("udf_vget called\n")); 900 return EOPNOTSUPP; 901 } 902 903 /* --------------------------------------------------------------------- */ 904 905 /* 906 * Lookup vnode for file handle specified 907 */ 908 int 909 udf_fhtovp(struct mount *mp, struct fid *fhp, 910 struct vnode **vpp) 911 { 912 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 913 return EOPNOTSUPP; 914 } 915 916 /* --------------------------------------------------------------------- */ 917 918 /* 919 * Create an unique file handle. Its structure is opaque and won't be used by 920 * other subsystems. It should uniquely identify the file in the filingsystem 921 * and enough information to know if a file has been removed and/or resources 922 * have been recycled. 923 */ 924 int 925 udf_vptofh(struct vnode *vp, struct fid *fid, 926 size_t *fh_size) 927 { 928 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 929 return EOPNOTSUPP; 930 } 931 932 /* --------------------------------------------------------------------- */ 933 934 /* 935 * Create a filingsystem snapshot at the specified timestamp. Could be 936 * implemented by explicitly creating a new session or with spare room in the 937 * integrity descriptor space 938 */ 939 int 940 udf_snapshot(struct mount *mp, struct vnode *vp, 941 struct timespec *tm) 942 { 943 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 944 return EOPNOTSUPP; 945 } 946 947 /* --------------------------------------------------------------------- */ 948