1 /* $NetBSD: udf_vfsops.c,v 1.76 2017/06/24 12:13:16 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 1.76 2017/06/24 12:13:16 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 = genfs_suspendctl, 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); 280 281 /* if we haven't even got an ump, dont bother */ 282 if (!ump) 283 return; 284 285 /* VAT partition support */ 286 if (ump->vat_node) 287 vrele(ump->vat_node->vnode); 288 289 /* Metadata partition support */ 290 if (ump->metadata_node) 291 vrele(ump->metadata_node->vnode); 292 if (ump->metadatamirror_node) 293 vrele(ump->metadatamirror_node->vnode); 294 if (ump->metadatabitmap_node) 295 vrele(ump->metadatabitmap_node->vnode); 296 } 297 298 299 int 300 udf_mount(struct mount *mp, const char *path, 301 void *data, size_t *data_len) 302 { 303 struct lwp *l = curlwp; 304 struct udf_args *args = data; 305 struct udf_mount *ump; 306 struct vnode *devvp; 307 int openflags, accessmode, error; 308 309 DPRINTF(CALL, ("udf_mount called\n")); 310 311 if (args == NULL) 312 return EINVAL; 313 if (*data_len < sizeof *args) 314 return EINVAL; 315 316 if (mp->mnt_flag & MNT_GETARGS) { 317 /* request for the mount arguments */ 318 ump = VFSTOUDF(mp); 319 if (ump == NULL) 320 return EINVAL; 321 *args = ump->mount_args; 322 *data_len = sizeof *args; 323 return 0; 324 } 325 326 /* handle request for updating mount parameters */ 327 /* TODO can't update my mountpoint yet */ 328 if (mp->mnt_flag & MNT_UPDATE) { 329 return EOPNOTSUPP; 330 } 331 332 /* OK, so we are asked to mount the device */ 333 334 /* check/translate struct version */ 335 /* TODO sanity checking other mount arguments */ 336 if (args->version != 1) { 337 printf("mount_udf: unrecognized argument structure version\n"); 338 return EINVAL; 339 } 340 341 /* lookup name to get its vnode */ 342 error = namei_simple_user(args->fspec, 343 NSM_FOLLOW_NOEMULROOT, &devvp); 344 if (error) 345 return error; 346 347 #ifdef DEBUG 348 if (udf_verbose & UDF_DEBUG_VOLUMES) 349 vprint("UDF mount, trying to mount \n", devvp); 350 #endif 351 352 /* check if its a block device specified */ 353 if (devvp->v_type != VBLK) { 354 vrele(devvp); 355 return ENOTBLK; 356 } 357 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 358 vrele(devvp); 359 return ENXIO; 360 } 361 362 /* 363 * If mount by non-root, then verify that user has necessary 364 * permissions on the device. 365 */ 366 accessmode = VREAD; 367 if ((mp->mnt_flag & MNT_RDONLY) == 0) 368 accessmode |= VWRITE; 369 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 370 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 371 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 372 VOP_UNLOCK(devvp); 373 if (error) { 374 vrele(devvp); 375 return error; 376 } 377 378 /* 379 * Open device and try to mount it! 380 */ 381 if (mp->mnt_flag & MNT_RDONLY) { 382 openflags = FREAD; 383 } else { 384 openflags = FREAD | FWRITE; 385 } 386 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 387 error = VOP_OPEN(devvp, openflags, FSCRED); 388 VOP_UNLOCK(devvp); 389 if (error == 0) { 390 /* opened ok, try mounting */ 391 error = udf_mountfs(devvp, mp, l, args); 392 if (error) { 393 udf_release_system_nodes(mp); 394 /* cleanup */ 395 udf_discstrat_finish(VFSTOUDF(mp)); 396 free_udf_mountinfo(mp); 397 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 398 (void) VOP_CLOSE(devvp, openflags, NOCRED); 399 VOP_UNLOCK(devvp); 400 } 401 } 402 if (error) { 403 /* devvp is still locked */ 404 vrele(devvp); 405 return error; 406 } 407 408 /* register our mountpoint being on this device */ 409 spec_node_setmountedfs(devvp, mp); 410 411 /* successfully mounted */ 412 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 413 414 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 415 mp->mnt_op->vfs_name, mp, l); 416 if (error) 417 return error; 418 419 /* If we're not opened read-only, open its logical volume */ 420 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 421 if ((error = udf_open_logvol(VFSTOUDF(mp))) != 0) { 422 printf( "mount_udf: can't open logical volume for " 423 "writing, downgrading access to read-only\n"); 424 mp->mnt_flag |= MNT_RDONLY; 425 /* FIXME we can't return error now on open failure */ 426 return 0; 427 } 428 } 429 430 return 0; 431 } 432 433 /* --------------------------------------------------------------------- */ 434 435 #ifdef DEBUG 436 static bool 437 udf_sanity_selector(void *cl, struct vnode *vp) 438 { 439 440 KASSERT(mutex_owned(vp->v_interlock)); 441 442 vprint("", vp); 443 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 444 printf(" is locked\n"); 445 } 446 if (vp->v_usecount > 1) 447 printf(" more than one usecount %d\n", vp->v_usecount); 448 return false; 449 } 450 451 static void 452 udf_unmount_sanity_check(struct mount *mp) 453 { 454 struct vnode_iterator *marker; 455 456 printf("On unmount, i found the following nodes:\n"); 457 vfs_vnode_iterator_init(mp, &marker); 458 vfs_vnode_iterator_next(marker, udf_sanity_selector, NULL); 459 vfs_vnode_iterator_destroy(marker); 460 } 461 #endif 462 463 464 int 465 udf_unmount(struct mount *mp, int mntflags) 466 { 467 struct udf_mount *ump; 468 int error, flags, closeflags; 469 470 DPRINTF(CALL, ("udf_umount called\n")); 471 472 ump = VFSTOUDF(mp); 473 if (!ump) 474 panic("UDF unmount: empty ump\n"); 475 476 flags = (mntflags & MNT_FORCE) ? FORCECLOSE : 0; 477 /* TODO remove these paranoid functions */ 478 #ifdef DEBUG 479 if (udf_verbose & UDF_DEBUG_LOCKING) 480 udf_unmount_sanity_check(mp); 481 #endif 482 483 /* 484 * By specifying SKIPSYSTEM we can skip vnodes marked with VV_SYSTEM. 485 * This hardly documented feature allows us to exempt certain files 486 * from being flushed. 487 */ 488 if ((error = vflush(mp, NULLVP, flags | SKIPSYSTEM)) != 0) 489 return error; 490 491 /* update nodes and wait for completion of writeout of system nodes */ 492 udf_sync(mp, FSYNC_WAIT, NOCRED); 493 494 #ifdef DEBUG 495 if (udf_verbose & UDF_DEBUG_LOCKING) 496 udf_unmount_sanity_check(mp); 497 #endif 498 499 /* flush again, to check if we are still busy for something else */ 500 if ((error = vflush(ump->vfs_mountp, NULLVP, flags | SKIPSYSTEM)) != 0) 501 return error; 502 503 DPRINTF(VOLUMES, ("flush OK on unmount\n")); 504 505 /* close logical volume and close session if requested */ 506 if ((error = udf_close_logvol(ump, mntflags)) != 0) 507 return error; 508 509 #ifdef DEBUG 510 DPRINTF(VOLUMES, ("FINAL sanity check\n")); 511 if (udf_verbose & UDF_DEBUG_LOCKING) 512 udf_unmount_sanity_check(mp); 513 #endif 514 515 /* NOTE release system nodes should NOT write anything */ 516 udf_release_system_nodes(mp); 517 518 /* This flush should NOT write anything nor allow any node to remain */ 519 if ((error = vflush(ump->vfs_mountp, NULLVP, 0)) != 0) 520 panic("Failure to flush UDF system vnodes\n"); 521 522 /* finalise disc strategy */ 523 udf_discstrat_finish(ump); 524 525 /* synchronise device caches */ 526 (void) udf_synchronise_caches(ump); 527 528 /* close device */ 529 DPRINTF(VOLUMES, ("closing device\n")); 530 if (mp->mnt_flag & MNT_RDONLY) { 531 closeflags = FREAD; 532 } else { 533 closeflags = FREAD | FWRITE; 534 } 535 536 /* devvp is still locked by us */ 537 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 538 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED); 539 if (error) 540 printf("Error during closure of device! error %d, " 541 "device might stay locked\n", error); 542 DPRINTF(VOLUMES, ("device close ok\n")); 543 544 /* clear our mount reference and release device node */ 545 spec_node_setmountedfs(ump->devvp, NULL); 546 vput(ump->devvp); 547 548 /* free our ump */ 549 free_udf_mountinfo(mp); 550 551 /* free ump struct references */ 552 mp->mnt_data = NULL; 553 mp->mnt_flag &= ~MNT_LOCAL; 554 555 DPRINTF(VOLUMES, ("Fin unmount\n")); 556 return error; 557 } 558 559 /* --------------------------------------------------------------------- */ 560 561 /* 562 * Helper function of udf_mount() that actually mounts the disc. 563 */ 564 565 static int 566 udf_mountfs(struct vnode *devvp, struct mount *mp, 567 struct lwp *l, struct udf_args *args) 568 { 569 struct udf_mount *ump; 570 uint32_t sector_size, lb_size, bshift; 571 uint32_t logvol_integrity; 572 int num_anchors, error; 573 574 /* flush out any old buffers remaining from a previous use. */ 575 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0))) 576 return error; 577 578 /* setup basic mount information */ 579 mp->mnt_data = NULL; 580 mp->mnt_stat.f_fsidx.__fsid_val[0] = (uint32_t) devvp->v_rdev; 581 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_UDF); 582 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 583 mp->mnt_stat.f_namemax = UDF_MAXNAMLEN; 584 mp->mnt_flag |= MNT_LOCAL; 585 // mp->mnt_iflag |= IMNT_MPSAFE; 586 587 /* allocate udf part of mount structure; malloc always succeeds */ 588 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK | M_ZERO); 589 590 /* init locks */ 591 mutex_init(&ump->logvol_mutex, MUTEX_DEFAULT, IPL_NONE); 592 mutex_init(&ump->allocate_mutex, MUTEX_DEFAULT, IPL_NONE); 593 mutex_init(&ump->sync_lock, MUTEX_DEFAULT, IPL_NONE); 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 /* success! */ 732 return 0; 733 } 734 735 /* --------------------------------------------------------------------- */ 736 737 int 738 udf_start(struct mount *mp, int flags) 739 { 740 /* do we have to do something here? */ 741 return 0; 742 } 743 744 /* --------------------------------------------------------------------- */ 745 746 int 747 udf_root(struct mount *mp, struct vnode **vpp) 748 { 749 struct vnode *vp; 750 struct long_ad *dir_loc; 751 struct udf_mount *ump = VFSTOUDF(mp); 752 struct udf_node *root_dir; 753 int error; 754 755 DPRINTF(CALL, ("udf_root called\n")); 756 757 dir_loc = &ump->fileset_desc->rootdir_icb; 758 error = udf_get_node(ump, dir_loc, &root_dir); 759 760 if (error) 761 return error; 762 763 if (!root_dir) 764 error = ENOENT; 765 766 vp = root_dir->vnode; 767 KASSERT(vp->v_vflag & VV_ROOT); 768 769 *vpp = vp; 770 return 0; 771 } 772 773 /* --------------------------------------------------------------------- */ 774 775 int 776 udf_statvfs(struct mount *mp, struct statvfs *sbp) 777 { 778 struct udf_mount *ump = VFSTOUDF(mp); 779 struct logvol_int_desc *lvid; 780 struct udf_logvol_info *impl; 781 uint64_t freeblks, sizeblks; 782 int num_part; 783 784 DPRINTF(CALL, ("udf_statvfs called\n")); 785 sbp->f_flag = mp->mnt_flag; 786 sbp->f_bsize = ump->discinfo.sector_size; 787 sbp->f_frsize = ump->discinfo.sector_size; 788 sbp->f_iosize = ump->discinfo.sector_size; 789 790 mutex_enter(&ump->allocate_mutex); 791 792 udf_calc_freespace(ump, &sizeblks, &freeblks); 793 794 sbp->f_blocks = sizeblks; 795 sbp->f_bfree = freeblks; 796 sbp->f_files = 0; 797 798 lvid = ump->logvol_integrity; 799 num_part = udf_rw32(lvid->num_part); 800 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 801 if (impl) { 802 sbp->f_files = udf_rw32(impl->num_files); 803 sbp->f_files += udf_rw32(impl->num_directories); 804 } 805 806 /* XXX read only for now XXX */ 807 sbp->f_bavail = 0; 808 sbp->f_bresvd = 0; 809 810 /* tricky, next only aplies to ffs i think, so set to zero */ 811 sbp->f_ffree = 0; 812 sbp->f_favail = 0; 813 sbp->f_fresvd = 0; 814 815 mutex_exit(&ump->allocate_mutex); 816 817 copy_statvfs_info(sbp, mp); 818 return 0; 819 } 820 821 /* --------------------------------------------------------------------- */ 822 823 /* 824 * TODO what about writing out free space maps, lvid etc? only on `waitfor' 825 * i.e. explicit syncing by the user? 826 */ 827 828 static int 829 udf_sync_writeout_system_files(struct udf_mount *ump, int clearflags) 830 { 831 int error; 832 833 /* XXX lock for VAT en bitmaps? */ 834 /* metadata nodes are written synchronous */ 835 DPRINTF(CALL, ("udf_sync: syncing metadata\n")); 836 if (ump->lvclose & UDF_WRITE_VAT) 837 udf_writeout_vat(ump); 838 839 error = 0; 840 if (ump->lvclose & UDF_WRITE_PART_BITMAPS) { 841 /* writeout metadata spacetable if existing */ 842 error = udf_write_metadata_partition_spacetable(ump, MNT_WAIT); 843 if (error) 844 printf( "udf_writeout_system_files : " 845 " writeout of metadata space bitmap failed\n"); 846 847 /* writeout partition spacetables */ 848 error = udf_write_physical_partition_spacetables(ump, MNT_WAIT); 849 if (error) 850 printf( "udf_writeout_system_files : " 851 "writeout of space tables failed\n"); 852 if (!error && clearflags) 853 ump->lvclose &= ~UDF_WRITE_PART_BITMAPS; 854 } 855 856 return error; 857 } 858 859 860 int 861 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 862 { 863 struct udf_mount *ump = VFSTOUDF(mp); 864 865 DPRINTF(CALL, ("udf_sync called\n")); 866 /* if called when mounted readonly, just ignore */ 867 if (mp->mnt_flag & MNT_RDONLY) 868 return 0; 869 870 if (ump->syncing && !waitfor) { 871 printf("UDF: skipping autosync\n"); 872 return 0; 873 } 874 875 /* get sync lock */ 876 ump->syncing = 1; 877 878 /* pre-sync */ 879 udf_do_sync(ump, cred, waitfor); 880 881 if (waitfor == MNT_WAIT) 882 udf_sync_writeout_system_files(ump, true); 883 884 DPRINTF(CALL, ("end of udf_sync()\n")); 885 ump->syncing = 0; 886 887 return 0; 888 } 889 890 /* --------------------------------------------------------------------- */ 891 892 /* 893 * Get vnode for the file system type specific file id ino for the fs. Its 894 * used for reference to files by unique ID and for NFSv3. 895 * (optional) TODO lookup why some sources state NFSv3 896 */ 897 int 898 udf_vget(struct mount *mp, ino_t ino, 899 struct vnode **vpp) 900 { 901 DPRINTF(NOTIMPL, ("udf_vget called\n")); 902 return EOPNOTSUPP; 903 } 904 905 /* --------------------------------------------------------------------- */ 906 907 /* 908 * Lookup vnode for file handle specified 909 */ 910 int 911 udf_fhtovp(struct mount *mp, struct fid *fhp, 912 struct vnode **vpp) 913 { 914 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 915 return EOPNOTSUPP; 916 } 917 918 /* --------------------------------------------------------------------- */ 919 920 /* 921 * Create an unique file handle. Its structure is opaque and won't be used by 922 * other subsystems. It should uniquely identify the file in the filingsystem 923 * and enough information to know if a file has been removed and/or resources 924 * have been recycled. 925 */ 926 int 927 udf_vptofh(struct vnode *vp, struct fid *fid, 928 size_t *fh_size) 929 { 930 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 931 return EOPNOTSUPP; 932 } 933 934 /* --------------------------------------------------------------------- */ 935 936 /* 937 * Create a filingsystem snapshot at the specified timestamp. Could be 938 * implemented by explicitly creating a new session or with spare room in the 939 * integrity descriptor space 940 */ 941 int 942 udf_snapshot(struct mount *mp, struct vnode *vp, 943 struct timespec *tm) 944 { 945 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 946 return EOPNOTSUPP; 947 } 948 949 /* --------------------------------------------------------------------- */ 950