1 /* $NetBSD: udf_vfsops.c,v 1.65 2014/02/25 18:30:11 pooka 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 1.65 2014/02/25 18:30:11 pooka 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, &node, 192 CTLFLAG_PERMANENT, 193 CTLTYPE_NODE, "udf", 194 SYSCTL_DESCR("OSTA Universal File System"), 195 NULL, 0, NULL, 0, 196 CTL_VFS, 24, CTL_EOL); 197 #ifdef DEBUG 198 sysctl_createv(&udf_sysctl_log, 0, NULL, &node, 199 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 200 CTLTYPE_INT, "verbose", 201 SYSCTL_DESCR("Bitmask for filesystem debugging"), 202 NULL, 0, &udf_verbose, 0, 203 CTL_VFS, 24, UDF_VERBOSE_SYSCTLOPT, CTL_EOL); 204 #endif 205 break; 206 case MODULE_CMD_FINI: 207 error = vfs_detach(&udf_vfsops); 208 if (error != 0) 209 break; 210 sysctl_teardown(&udf_sysctl_log); 211 break; 212 default: 213 error = ENOTTY; 214 break; 215 } 216 217 return (error); 218 } 219 220 /* --------------------------------------------------------------------- */ 221 222 int 223 udf_mountroot(void) 224 { 225 return EOPNOTSUPP; 226 } 227 228 /* --------------------------------------------------------------------- */ 229 230 #define MPFREE(a, lst) \ 231 if ((a)) free((a), lst); 232 static void 233 free_udf_mountinfo(struct mount *mp) 234 { 235 struct udf_mount *ump; 236 int i; 237 238 if (!mp) 239 return; 240 241 ump = VFSTOUDF(mp); 242 if (ump) { 243 /* clear our data */ 244 for (i = 0; i < UDF_ANCHORS; i++) 245 MPFREE(ump->anchors[i], M_UDFVOLD); 246 MPFREE(ump->primary_vol, M_UDFVOLD); 247 MPFREE(ump->logical_vol, M_UDFVOLD); 248 MPFREE(ump->unallocated, M_UDFVOLD); 249 MPFREE(ump->implementation, M_UDFVOLD); 250 MPFREE(ump->logvol_integrity, M_UDFVOLD); 251 for (i = 0; i < UDF_PARTITIONS; i++) { 252 MPFREE(ump->partitions[i], M_UDFVOLD); 253 MPFREE(ump->part_unalloc_dscr[i], M_UDFVOLD); 254 MPFREE(ump->part_freed_dscr[i], M_UDFVOLD); 255 } 256 MPFREE(ump->metadata_unalloc_dscr, M_UDFVOLD); 257 258 MPFREE(ump->fileset_desc, M_UDFVOLD); 259 MPFREE(ump->sparing_table, M_UDFVOLD); 260 261 MPFREE(ump->la_node_ad_cpy, M_UDFMNT); 262 MPFREE(ump->la_pmapping, M_TEMP); 263 MPFREE(ump->la_lmapping, M_TEMP); 264 265 mutex_destroy(&ump->ihash_lock); 266 mutex_destroy(&ump->get_node_lock); 267 mutex_destroy(&ump->logvol_mutex); 268 mutex_destroy(&ump->allocate_mutex); 269 cv_destroy(&ump->dirtynodes_cv); 270 271 MPFREE(ump->vat_table, M_UDFVOLD); 272 273 free(ump, M_UDFMNT); 274 } 275 } 276 #undef MPFREE 277 278 /* --------------------------------------------------------------------- */ 279 280 /* if the system nodes exist, release them */ 281 static void 282 udf_release_system_nodes(struct mount *mp) 283 { 284 struct udf_mount *ump = VFSTOUDF(mp); 285 int error; 286 287 /* if we haven't even got an ump, dont bother */ 288 if (!ump) 289 return; 290 291 /* VAT partition support */ 292 if (ump->vat_node) 293 vrele(ump->vat_node->vnode); 294 295 /* Metadata partition support */ 296 if (ump->metadata_node) 297 vrele(ump->metadata_node->vnode); 298 if (ump->metadatamirror_node) 299 vrele(ump->metadatamirror_node->vnode); 300 if (ump->metadatabitmap_node) 301 vrele(ump->metadatabitmap_node->vnode); 302 303 /* This flush should NOT write anything nor allow any node to remain */ 304 if ((error = vflush(ump->vfs_mountp, NULLVP, 0)) != 0) 305 panic("Failure to flush UDF system vnodes\n"); 306 } 307 308 309 int 310 udf_mount(struct mount *mp, const char *path, 311 void *data, size_t *data_len) 312 { 313 struct lwp *l = curlwp; 314 struct udf_args *args = data; 315 struct udf_mount *ump; 316 struct vnode *devvp; 317 int openflags, accessmode, error; 318 319 DPRINTF(CALL, ("udf_mount called\n")); 320 321 if (*data_len < sizeof *args) 322 return EINVAL; 323 324 if (mp->mnt_flag & MNT_GETARGS) { 325 /* request for the mount arguments */ 326 ump = VFSTOUDF(mp); 327 if (ump == NULL) 328 return EINVAL; 329 *args = ump->mount_args; 330 *data_len = sizeof *args; 331 return 0; 332 } 333 334 /* handle request for updating mount parameters */ 335 /* TODO can't update my mountpoint yet */ 336 if (mp->mnt_flag & MNT_UPDATE) { 337 return EOPNOTSUPP; 338 } 339 340 /* OK, so we are asked to mount the device */ 341 342 /* check/translate struct version */ 343 /* TODO sanity checking other mount arguments */ 344 if (args->version != 1) { 345 printf("mount_udf: unrecognized argument structure version\n"); 346 return EINVAL; 347 } 348 349 /* lookup name to get its vnode */ 350 error = namei_simple_user(args->fspec, 351 NSM_FOLLOW_NOEMULROOT, &devvp); 352 if (error) 353 return error; 354 355 #ifdef DEBUG 356 if (udf_verbose & UDF_DEBUG_VOLUMES) 357 vprint("UDF mount, trying to mount \n", devvp); 358 #endif 359 360 /* check if its a block device specified */ 361 if (devvp->v_type != VBLK) { 362 vrele(devvp); 363 return ENOTBLK; 364 } 365 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 366 vrele(devvp); 367 return ENXIO; 368 } 369 370 /* 371 * If mount by non-root, then verify that user has necessary 372 * permissions on the device. 373 */ 374 accessmode = VREAD; 375 if ((mp->mnt_flag & MNT_RDONLY) == 0) 376 accessmode |= VWRITE; 377 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 378 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 379 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 380 VOP_UNLOCK(devvp); 381 if (error) { 382 vrele(devvp); 383 return error; 384 } 385 386 /* 387 * Open device and try to mount it! 388 */ 389 if (mp->mnt_flag & MNT_RDONLY) { 390 openflags = FREAD; 391 } else { 392 openflags = FREAD | FWRITE; 393 } 394 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 395 error = VOP_OPEN(devvp, openflags, FSCRED); 396 VOP_UNLOCK(devvp); 397 if (error == 0) { 398 /* opened ok, try mounting */ 399 error = udf_mountfs(devvp, mp, l, args); 400 if (error) { 401 udf_release_system_nodes(mp); 402 /* cleanup */ 403 udf_discstrat_finish(VFSTOUDF(mp)); 404 free_udf_mountinfo(mp); 405 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 406 (void) VOP_CLOSE(devvp, openflags, NOCRED); 407 VOP_UNLOCK(devvp); 408 } 409 } 410 if (error) { 411 /* devvp is still locked */ 412 vrele(devvp); 413 return error; 414 } 415 416 /* register our mountpoint being on this device */ 417 spec_node_setmountedfs(devvp, mp); 418 419 /* successfully mounted */ 420 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 421 422 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 423 mp->mnt_op->vfs_name, mp, l); 424 if (error) 425 return error; 426 427 /* If we're not opened read-only, open its logical volume */ 428 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 429 if ((error = udf_open_logvol(VFSTOUDF(mp))) != 0) { 430 printf( "mount_udf: can't open logical volume for " 431 "writing, downgrading access to read-only\n"); 432 mp->mnt_flag |= MNT_RDONLY; 433 /* FIXME we can't return error now on open failure */ 434 return 0; 435 } 436 } 437 438 return 0; 439 } 440 441 /* --------------------------------------------------------------------- */ 442 443 #ifdef DEBUG 444 static void 445 udf_unmount_sanity_check(struct mount *mp) 446 { 447 struct vnode *vp; 448 449 printf("On unmount, i found the following nodes:\n"); 450 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 451 vprint("", vp); 452 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 453 printf(" is locked\n"); 454 } 455 if (vp->v_usecount > 1) 456 printf(" more than one usecount %d\n", vp->v_usecount); 457 } 458 } 459 #endif 460 461 462 int 463 udf_unmount(struct mount *mp, int mntflags) 464 { 465 struct udf_mount *ump; 466 int error, flags, closeflags; 467 468 DPRINTF(CALL, ("udf_umount called\n")); 469 470 ump = VFSTOUDF(mp); 471 if (!ump) 472 panic("UDF unmount: empty ump\n"); 473 474 flags = (mntflags & MNT_FORCE) ? FORCECLOSE : 0; 475 /* TODO remove these paranoid functions */ 476 #ifdef DEBUG 477 if (udf_verbose & UDF_DEBUG_LOCKING) 478 udf_unmount_sanity_check(mp); 479 #endif 480 481 /* 482 * By specifying SKIPSYSTEM we can skip vnodes marked with VV_SYSTEM. 483 * This hardly documented feature allows us to exempt certain files 484 * from being flushed. 485 */ 486 if ((error = vflush(mp, NULLVP, flags | SKIPSYSTEM)) != 0) 487 return error; 488 489 /* update nodes and wait for completion of writeout of system nodes */ 490 udf_sync(mp, FSYNC_WAIT, NOCRED); 491 492 #ifdef DEBUG 493 if (udf_verbose & UDF_DEBUG_LOCKING) 494 udf_unmount_sanity_check(mp); 495 #endif 496 497 /* flush again, to check if we are still busy for something else */ 498 if ((error = vflush(ump->vfs_mountp, NULLVP, flags | SKIPSYSTEM)) != 0) 499 return error; 500 501 DPRINTF(VOLUMES, ("flush OK on unmount\n")); 502 503 /* close logical volume and close session if requested */ 504 if ((error = udf_close_logvol(ump, mntflags)) != 0) 505 return error; 506 507 #ifdef DEBUG 508 DPRINTF(VOLUMES, ("FINAL sanity check\n")); 509 if (udf_verbose & UDF_DEBUG_LOCKING) 510 udf_unmount_sanity_check(mp); 511 #endif 512 513 /* NOTE release system nodes should NOT write anything */ 514 udf_release_system_nodes(mp); 515 516 /* finalise disc strategy */ 517 udf_discstrat_finish(ump); 518 519 /* synchronise device caches */ 520 (void) udf_synchronise_caches(ump); 521 522 /* close device */ 523 DPRINTF(VOLUMES, ("closing device\n")); 524 if (mp->mnt_flag & MNT_RDONLY) { 525 closeflags = FREAD; 526 } else { 527 closeflags = FREAD | FWRITE; 528 } 529 530 /* devvp is still locked by us */ 531 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 532 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED); 533 if (error) 534 printf("Error during closure of device! error %d, " 535 "device might stay locked\n", error); 536 DPRINTF(VOLUMES, ("device close ok\n")); 537 538 /* clear our mount reference and release device node */ 539 spec_node_setmountedfs(ump->devvp, NULL); 540 vput(ump->devvp); 541 542 /* free our ump */ 543 free_udf_mountinfo(mp); 544 545 /* free ump struct references */ 546 mp->mnt_data = NULL; 547 mp->mnt_flag &= ~MNT_LOCAL; 548 549 DPRINTF(VOLUMES, ("Fin unmount\n")); 550 return error; 551 } 552 553 /* --------------------------------------------------------------------- */ 554 555 /* 556 * Helper function of udf_mount() that actually mounts the disc. 557 */ 558 559 static int 560 udf_mountfs(struct vnode *devvp, struct mount *mp, 561 struct lwp *l, struct udf_args *args) 562 { 563 struct udf_mount *ump; 564 uint32_t sector_size, lb_size, bshift; 565 uint32_t logvol_integrity; 566 int num_anchors, error; 567 568 /* flush out any old buffers remaining from a previous use. */ 569 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0))) 570 return error; 571 572 /* setup basic mount information */ 573 mp->mnt_data = NULL; 574 mp->mnt_stat.f_fsidx.__fsid_val[0] = (uint32_t) devvp->v_rdev; 575 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_UDF); 576 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 577 mp->mnt_stat.f_namemax = UDF_MAXNAMLEN; 578 mp->mnt_flag |= MNT_LOCAL; 579 // mp->mnt_iflag |= IMNT_MPSAFE; 580 581 /* allocate udf part of mount structure; malloc always succeeds */ 582 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK | M_ZERO); 583 584 /* init locks */ 585 mutex_init(&ump->logvol_mutex, MUTEX_DEFAULT, IPL_NONE); 586 mutex_init(&ump->ihash_lock, MUTEX_DEFAULT, IPL_NONE); 587 mutex_init(&ump->get_node_lock, MUTEX_DEFAULT, IPL_NONE); 588 mutex_init(&ump->allocate_mutex, MUTEX_DEFAULT, IPL_NONE); 589 cv_init(&ump->dirtynodes_cv, "udfsync2"); 590 591 /* init rbtree for nodes, ordered by their icb address (long_ad) */ 592 udf_init_nodes_tree(ump); 593 594 /* set up linkage */ 595 mp->mnt_data = ump; 596 ump->vfs_mountp = mp; 597 598 /* set up arguments and device */ 599 ump->mount_args = *args; 600 ump->devvp = devvp; 601 if ((error = udf_update_discinfo(ump))) { 602 printf("UDF mount: error inspecting fs node\n"); 603 return error; 604 } 605 606 /* inspect sector size */ 607 sector_size = ump->discinfo.sector_size; 608 bshift = 1; 609 while ((1 << bshift) < sector_size) 610 bshift++; 611 if ((1 << bshift) != sector_size) { 612 printf("UDF mount: " 613 "hit NetBSD implementation fence on sector size\n"); 614 return EIO; 615 } 616 617 /* temporary check to overcome sectorsize >= 8192 bytes panic */ 618 if (sector_size >= 8192) { 619 printf("UDF mount: " 620 "hit implementation limit, sectorsize to big\n"); 621 return EIO; 622 } 623 624 /* 625 * Inspect if we're asked to mount read-write on a non recordable or 626 * closed sequential disc. 627 */ 628 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 629 if ((ump->discinfo.mmc_cur & MMC_CAP_RECORDABLE) == 0) { 630 printf("UDF mount: disc is not recordable\n"); 631 return EROFS; 632 } 633 if (ump->discinfo.mmc_cur & MMC_CAP_SEQUENTIAL) { 634 if (ump->discinfo.disc_state == MMC_STATE_FULL) { 635 printf("UDF mount: disc is not appendable\n"); 636 return EROFS; 637 } 638 639 /* 640 * TODO if the last session is closed check if there 641 * is enough space to open/close new session 642 */ 643 } 644 /* double check if we're not mounting a pervious session RW */ 645 if (args->sessionnr != 0) { 646 printf("UDF mount: updating a previous session " 647 "not yet allowed\n"); 648 return EROFS; 649 } 650 } 651 652 /* initialise bootstrap disc strategy */ 653 ump->strategy = &udf_strat_bootstrap; 654 udf_discstrat_init(ump); 655 656 /* read all anchors to get volume descriptor sequence */ 657 num_anchors = udf_read_anchors(ump); 658 if (num_anchors == 0) 659 return EINVAL; 660 661 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 662 num_anchors, args->sessionnr)); 663 664 /* read in volume descriptor sequence */ 665 if ((error = udf_read_vds_space(ump))) { 666 printf("UDF mount: error reading volume space\n"); 667 return error; 668 } 669 670 /* close down bootstrap disc strategy */ 671 udf_discstrat_finish(ump); 672 673 /* check consistency and completeness */ 674 if ((error = udf_process_vds(ump))) { 675 printf( "UDF mount: disc not properly formatted" 676 "(bad VDS)\n"); 677 return error; 678 } 679 680 /* switch to new disc strategy */ 681 KASSERT(ump->strategy != &udf_strat_bootstrap); 682 udf_discstrat_init(ump); 683 684 /* initialise late allocation administration space */ 685 ump->la_lmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 686 M_TEMP, M_WAITOK); 687 ump->la_pmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 688 M_TEMP, M_WAITOK); 689 690 /* setup node cleanup extents copy space */ 691 lb_size = udf_rw32(ump->logical_vol->lb_size); 692 ump->la_node_ad_cpy = malloc(lb_size * UDF_MAX_ALLOC_EXTENTS, 693 M_UDFMNT, M_WAITOK); 694 memset(ump->la_node_ad_cpy, 0, lb_size * UDF_MAX_ALLOC_EXTENTS); 695 696 /* setup rest of mount information */ 697 mp->mnt_data = ump; 698 699 /* bshift is allways equal to disc sector size */ 700 mp->mnt_dev_bshift = bshift; 701 mp->mnt_fs_bshift = bshift; 702 703 /* note that the mp info needs to be initialised for reading! */ 704 /* read vds support tables like VAT, sparable etc. */ 705 if ((error = udf_read_vds_tables(ump))) { 706 printf( "UDF mount: error in format or damaged disc " 707 "(VDS tables failing)\n"); 708 return error; 709 } 710 711 /* check if volume integrity is closed otherwise its dirty */ 712 logvol_integrity = udf_rw32(ump->logvol_integrity->integrity_type); 713 if (logvol_integrity != UDF_INTEGRITY_CLOSED) { 714 printf("UDF mount: file system is not clean; "); 715 printf("please fsck(8)\n"); 716 return EPERM; 717 } 718 719 /* read root directory */ 720 if ((error = udf_read_rootdirs(ump))) { 721 printf( "UDF mount: " 722 "disc not properly formatted or damaged disc " 723 "(rootdirs failing)\n"); 724 return error; 725 } 726 727 /* success! */ 728 return 0; 729 } 730 731 /* --------------------------------------------------------------------- */ 732 733 int 734 udf_start(struct mount *mp, int flags) 735 { 736 /* do we have to do something here? */ 737 return 0; 738 } 739 740 /* --------------------------------------------------------------------- */ 741 742 int 743 udf_root(struct mount *mp, struct vnode **vpp) 744 { 745 struct vnode *vp; 746 struct long_ad *dir_loc; 747 struct udf_mount *ump = VFSTOUDF(mp); 748 struct udf_node *root_dir; 749 int error; 750 751 DPRINTF(CALL, ("udf_root called\n")); 752 753 dir_loc = &ump->fileset_desc->rootdir_icb; 754 error = udf_get_node(ump, dir_loc, &root_dir); 755 756 if (!root_dir) 757 error = ENOENT; 758 if (error) 759 return error; 760 761 vp = root_dir->vnode; 762 KASSERT(vp->v_vflag & VV_ROOT); 763 764 *vpp = vp; 765 return 0; 766 } 767 768 /* --------------------------------------------------------------------- */ 769 770 int 771 udf_statvfs(struct mount *mp, struct statvfs *sbp) 772 { 773 struct udf_mount *ump = VFSTOUDF(mp); 774 struct logvol_int_desc *lvid; 775 struct udf_logvol_info *impl; 776 uint64_t freeblks, sizeblks; 777 int num_part; 778 779 DPRINTF(CALL, ("udf_statvfs called\n")); 780 sbp->f_flag = mp->mnt_flag; 781 sbp->f_bsize = ump->discinfo.sector_size; 782 sbp->f_frsize = ump->discinfo.sector_size; 783 sbp->f_iosize = ump->discinfo.sector_size; 784 785 mutex_enter(&ump->allocate_mutex); 786 787 udf_calc_freespace(ump, &sizeblks, &freeblks); 788 789 sbp->f_blocks = sizeblks; 790 sbp->f_bfree = freeblks; 791 sbp->f_files = 0; 792 793 lvid = ump->logvol_integrity; 794 num_part = udf_rw32(lvid->num_part); 795 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 796 if (impl) { 797 sbp->f_files = udf_rw32(impl->num_files); 798 sbp->f_files += udf_rw32(impl->num_directories); 799 } 800 801 /* XXX read only for now XXX */ 802 sbp->f_bavail = 0; 803 sbp->f_bresvd = 0; 804 805 /* tricky, next only aplies to ffs i think, so set to zero */ 806 sbp->f_ffree = 0; 807 sbp->f_favail = 0; 808 sbp->f_fresvd = 0; 809 810 mutex_exit(&ump->allocate_mutex); 811 812 copy_statvfs_info(sbp, mp); 813 return 0; 814 } 815 816 /* --------------------------------------------------------------------- */ 817 818 /* 819 * TODO what about writing out free space maps, lvid etc? only on `waitfor' 820 * i.e. explicit syncing by the user? 821 */ 822 823 static int 824 udf_sync_writeout_system_files(struct udf_mount *ump, int clearflags) 825 { 826 int error; 827 828 /* XXX lock for VAT en bitmaps? */ 829 /* metadata nodes are written synchronous */ 830 DPRINTF(CALL, ("udf_sync: syncing metadata\n")); 831 if (ump->lvclose & UDF_WRITE_VAT) 832 udf_writeout_vat(ump); 833 834 error = 0; 835 if (ump->lvclose & UDF_WRITE_PART_BITMAPS) { 836 /* writeout metadata spacetable if existing */ 837 error = udf_write_metadata_partition_spacetable(ump, MNT_WAIT); 838 if (error) 839 printf( "udf_writeout_system_files : " 840 " writeout of metadata space bitmap failed\n"); 841 842 /* writeout partition spacetables */ 843 error = udf_write_physical_partition_spacetables(ump, MNT_WAIT); 844 if (error) 845 printf( "udf_writeout_system_files : " 846 "writeout of space tables failed\n"); 847 if (!error && clearflags) 848 ump->lvclose &= ~UDF_WRITE_PART_BITMAPS; 849 } 850 851 return error; 852 } 853 854 855 int 856 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 857 { 858 struct udf_mount *ump = VFSTOUDF(mp); 859 860 DPRINTF(CALL, ("udf_sync called\n")); 861 /* if called when mounted readonly, just ignore */ 862 if (mp->mnt_flag & MNT_RDONLY) 863 return 0; 864 865 if (ump->syncing && !waitfor) { 866 printf("UDF: skipping autosync\n"); 867 return 0; 868 } 869 870 /* get sync lock */ 871 ump->syncing = 1; 872 873 /* pre-sync */ 874 udf_do_sync(ump, cred, waitfor); 875 876 if (waitfor == MNT_WAIT) 877 udf_sync_writeout_system_files(ump, true); 878 879 DPRINTF(CALL, ("end of udf_sync()\n")); 880 ump->syncing = 0; 881 882 return 0; 883 } 884 885 /* --------------------------------------------------------------------- */ 886 887 /* 888 * Get vnode for the file system type specific file id ino for the fs. Its 889 * used for reference to files by unique ID and for NFSv3. 890 * (optional) TODO lookup why some sources state NFSv3 891 */ 892 int 893 udf_vget(struct mount *mp, ino_t ino, 894 struct vnode **vpp) 895 { 896 DPRINTF(NOTIMPL, ("udf_vget called\n")); 897 return EOPNOTSUPP; 898 } 899 900 /* --------------------------------------------------------------------- */ 901 902 /* 903 * Lookup vnode for file handle specified 904 */ 905 int 906 udf_fhtovp(struct mount *mp, struct fid *fhp, 907 struct vnode **vpp) 908 { 909 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 910 return EOPNOTSUPP; 911 } 912 913 /* --------------------------------------------------------------------- */ 914 915 /* 916 * Create an unique file handle. Its structure is opaque and won't be used by 917 * other subsystems. It should uniquely identify the file in the filingsystem 918 * and enough information to know if a file has been removed and/or resources 919 * have been recycled. 920 */ 921 int 922 udf_vptofh(struct vnode *vp, struct fid *fid, 923 size_t *fh_size) 924 { 925 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 926 return EOPNOTSUPP; 927 } 928 929 /* --------------------------------------------------------------------- */ 930 931 /* 932 * Create a filingsystem snapshot at the specified timestamp. Could be 933 * implemented by explicitly creating a new session or with spare room in the 934 * integrity descriptor space 935 */ 936 int 937 udf_snapshot(struct mount *mp, struct vnode *vp, 938 struct timespec *tm) 939 { 940 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 941 return EOPNOTSUPP; 942 } 943 944 /* --------------------------------------------------------------------- */ 945