1 /* $NetBSD: udf_vfsops.c,v 1.56 2009/04/25 18:53:45 elad 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 1.56 2009/04/25 18:53:45 elad 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 nameidata nd; 320 struct udf_args *args = data; 321 struct udf_mount *ump; 322 struct vnode *devvp; 323 int openflags, accessmode, error; 324 325 DPRINTF(CALL, ("udf_mount called\n")); 326 327 if (*data_len < sizeof *args) 328 return EINVAL; 329 330 if (mp->mnt_flag & MNT_GETARGS) { 331 /* request for the mount arguments */ 332 ump = VFSTOUDF(mp); 333 if (ump == NULL) 334 return EINVAL; 335 *args = ump->mount_args; 336 *data_len = sizeof *args; 337 return 0; 338 } 339 340 /* handle request for updating mount parameters */ 341 /* TODO can't update my mountpoint yet */ 342 if (mp->mnt_flag & MNT_UPDATE) { 343 return EOPNOTSUPP; 344 } 345 346 /* OK, so we are asked to mount the device */ 347 348 /* check/translate struct version */ 349 /* TODO sanity checking other mount arguments */ 350 if (args->version != 1) { 351 printf("mount_udf: unrecognized argument structure version\n"); 352 return EINVAL; 353 } 354 355 /* lookup name to get its vnode */ 356 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 357 error = namei(&nd); 358 if (error) 359 return error; 360 devvp = nd.ni_vp; 361 362 #ifdef DEBUG 363 if (udf_verbose & UDF_DEBUG_VOLUMES) 364 vprint("UDF mount, trying to mount \n", devvp); 365 #endif 366 367 /* check if its a block device specified */ 368 if (devvp->v_type != VBLK) { 369 vrele(devvp); 370 return ENOTBLK; 371 } 372 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 373 vrele(devvp); 374 return ENXIO; 375 } 376 377 /* 378 * If mount by non-root, then verify that user has necessary 379 * permissions on the device. 380 */ 381 accessmode = VREAD; 382 if ((mp->mnt_flag & MNT_RDONLY) == 0) 383 accessmode |= VWRITE; 384 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 385 error = genfs_can_mount(devvp, accessmode, l->l_cred); 386 VOP_UNLOCK(devvp, 0); 387 if (error) { 388 vrele(devvp); 389 return error; 390 } 391 392 /* 393 * Open device and try to mount it! 394 */ 395 if (mp->mnt_flag & MNT_RDONLY) { 396 openflags = FREAD; 397 } else { 398 openflags = FREAD | FWRITE; 399 } 400 error = VOP_OPEN(devvp, openflags, FSCRED); 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, 0); 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, lst; 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_MAX_NAMELEN; 582 mp->mnt_flag |= MNT_LOCAL; 583 584 /* allocate udf part of mount structure; malloc always succeeds */ 585 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK | M_ZERO); 586 587 /* init locks */ 588 mutex_init(&ump->logvol_mutex, MUTEX_DEFAULT, IPL_NONE); 589 mutex_init(&ump->ihash_lock, MUTEX_DEFAULT, IPL_NONE); 590 mutex_init(&ump->get_node_lock, MUTEX_DEFAULT, IPL_NONE); 591 mutex_init(&ump->allocate_mutex, MUTEX_DEFAULT, IPL_NONE); 592 cv_init(&ump->dirtynodes_cv, "udfsync2"); 593 594 /* init `ino_t' to udf_node hash table and other lists */ 595 for (lst = 0; lst < UDF_INODE_HASHSIZE; lst++) { 596 LIST_INIT(&ump->udf_nodes[lst]); 597 } 598 599 /* set up linkage */ 600 mp->mnt_data = ump; 601 ump->vfs_mountp = mp; 602 603 /* set up arguments and device */ 604 ump->mount_args = *args; 605 ump->devvp = devvp; 606 if ((error = udf_update_discinfo(ump))) { 607 printf("UDF mount: error inspecting fs node\n"); 608 return error; 609 } 610 611 /* inspect sector size */ 612 sector_size = ump->discinfo.sector_size; 613 bshift = 1; 614 while ((1 << bshift) < sector_size) 615 bshift++; 616 if ((1 << bshift) != sector_size) { 617 printf("UDF mount: " 618 "hit NetBSD implementation fence on sector size\n"); 619 return EIO; 620 } 621 622 /* temporary check to overcome sectorsize >= 8192 bytes panic */ 623 if (sector_size >= 8192) { 624 printf("UDF mount: " 625 "hit implementation limit, sectorsize to big\n"); 626 return EIO; 627 } 628 629 /* 630 * Inspect if we're asked to mount read-write on a non recordable or 631 * closed sequential disc. 632 */ 633 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 634 if ((ump->discinfo.mmc_cur & MMC_CAP_RECORDABLE) == 0) { 635 printf("UDF mount: disc is not recordable\n"); 636 return EROFS; 637 } 638 if (ump->discinfo.mmc_cur & MMC_CAP_SEQUENTIAL) { 639 if (ump->discinfo.disc_state == MMC_STATE_FULL) { 640 printf("UDF mount: disc is not appendable\n"); 641 return EROFS; 642 } 643 644 /* 645 * TODO if the last session is closed check if there 646 * is enough space to open/close new session 647 */ 648 } 649 /* double check if we're not mounting a pervious session RW */ 650 if (args->sessionnr != 0) { 651 printf("UDF mount: updating a previous session " 652 "not yet allowed\n"); 653 return EROFS; 654 } 655 } 656 657 /* initialise bootstrap disc strategy */ 658 ump->strategy = &udf_strat_bootstrap; 659 udf_discstrat_init(ump); 660 661 /* read all anchors to get volume descriptor sequence */ 662 num_anchors = udf_read_anchors(ump); 663 if (num_anchors == 0) 664 return EINVAL; 665 666 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 667 num_anchors, args->sessionnr)); 668 669 /* read in volume descriptor sequence */ 670 if ((error = udf_read_vds_space(ump))) { 671 printf("UDF mount: error reading volume space\n"); 672 return error; 673 } 674 675 /* close down bootstrap disc strategy */ 676 udf_discstrat_finish(ump); 677 678 /* check consistency and completeness */ 679 if ((error = udf_process_vds(ump))) { 680 printf( "UDF mount: disc not properly formatted" 681 "(bad VDS)\n"); 682 return error; 683 } 684 685 /* switch to new disc strategy */ 686 KASSERT(ump->strategy != &udf_strat_bootstrap); 687 udf_discstrat_init(ump); 688 689 /* initialise late allocation administration space */ 690 ump->la_lmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 691 M_TEMP, M_WAITOK); 692 ump->la_pmapping = malloc(sizeof(uint64_t) * UDF_MAX_MAPPINGS, 693 M_TEMP, M_WAITOK); 694 695 /* setup node cleanup extents copy space */ 696 lb_size = udf_rw32(ump->logical_vol->lb_size); 697 ump->la_node_ad_cpy = malloc(lb_size * UDF_MAX_ALLOC_EXTENTS, 698 M_UDFMNT, M_WAITOK); 699 memset(ump->la_node_ad_cpy, 0, lb_size * UDF_MAX_ALLOC_EXTENTS); 700 701 /* setup rest of mount information */ 702 mp->mnt_data = ump; 703 704 /* bshift is allways equal to disc sector size */ 705 mp->mnt_dev_bshift = bshift; 706 mp->mnt_fs_bshift = bshift; 707 708 /* note that the mp info needs to be initialised for reading! */ 709 /* read vds support tables like VAT, sparable etc. */ 710 if ((error = udf_read_vds_tables(ump))) { 711 printf( "UDF mount: error in format or damaged disc " 712 "(VDS tables failing)\n"); 713 return error; 714 } 715 716 /* check if volume integrity is closed otherwise its dirty */ 717 logvol_integrity = udf_rw32(ump->logvol_integrity->integrity_type); 718 if (logvol_integrity != UDF_INTEGRITY_CLOSED) { 719 printf("UDF mount: file system is not clean; "); 720 printf("please fsck(8)\n"); 721 return EPERM; 722 } 723 724 /* read root directory */ 725 if ((error = udf_read_rootdirs(ump))) { 726 printf( "UDF mount: " 727 "disc not properly formatted or damaged disc " 728 "(rootdirs failing)\n"); 729 return error; 730 } 731 732 /* do we have to set this? */ 733 devvp->v_specmountpoint = mp; 734 735 /* success! */ 736 return 0; 737 } 738 739 /* --------------------------------------------------------------------- */ 740 741 int 742 udf_start(struct mount *mp, int flags) 743 { 744 /* do we have to do something here? */ 745 return 0; 746 } 747 748 /* --------------------------------------------------------------------- */ 749 750 int 751 udf_root(struct mount *mp, struct vnode **vpp) 752 { 753 struct vnode *vp; 754 struct long_ad *dir_loc; 755 struct udf_mount *ump = VFSTOUDF(mp); 756 struct udf_node *root_dir; 757 int error; 758 759 DPRINTF(CALL, ("udf_root called\n")); 760 761 dir_loc = &ump->fileset_desc->rootdir_icb; 762 error = udf_get_node(ump, dir_loc, &root_dir); 763 764 if (!root_dir) 765 error = ENOENT; 766 if (error) 767 return error; 768 769 vp = root_dir->vnode; 770 KASSERT(vp->v_vflag & VV_ROOT); 771 772 *vpp = vp; 773 return 0; 774 } 775 776 /* --------------------------------------------------------------------- */ 777 778 int 779 udf_statvfs(struct mount *mp, struct statvfs *sbp) 780 { 781 struct udf_mount *ump = VFSTOUDF(mp); 782 struct logvol_int_desc *lvid; 783 struct udf_logvol_info *impl; 784 uint64_t freeblks, sizeblks; 785 uint32_t *pos1, *pos2; 786 int part, num_part; 787 788 DPRINTF(CALL, ("udf_statvfs called\n")); 789 sbp->f_flag = mp->mnt_flag; 790 sbp->f_bsize = ump->discinfo.sector_size; 791 sbp->f_frsize = ump->discinfo.sector_size; 792 sbp->f_iosize = ump->discinfo.sector_size; 793 794 mutex_enter(&ump->allocate_mutex); 795 lvid = ump->logvol_integrity; 796 freeblks = sizeblks = 0; 797 798 /* Sequentials report free space directly (CD/DVD/BD-R) */ 799 KASSERT(lvid); 800 num_part = udf_rw32(lvid->num_part); 801 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 802 803 if (ump->discinfo.mmc_cur & MMC_CAP_SEQUENTIAL) { 804 /* XXX assumption at most two tracks open */ 805 freeblks = ump->data_track.free_blocks; 806 if (ump->data_track.tracknr != ump->metadata_track.tracknr) 807 freeblks += ump->metadata_track.free_blocks; 808 sizeblks = ump->discinfo.last_possible_lba; 809 } else { 810 /* free and used space for mountpoint based on logvol integrity */ 811 for (part=0; part < num_part; part++) { 812 pos1 = &lvid->tables[0] + part; 813 pos2 = &lvid->tables[0] + num_part + part; 814 if (udf_rw32(*pos1) != (uint32_t) -1) { 815 freeblks += udf_rw32(*pos1); 816 sizeblks += udf_rw32(*pos2); 817 } 818 } 819 } 820 freeblks -= ump->uncomitted_lb; 821 822 sbp->f_blocks = sizeblks; 823 sbp->f_bfree = freeblks; 824 sbp->f_files = 0; 825 if (impl) { 826 sbp->f_files = udf_rw32(impl->num_files); 827 sbp->f_files += udf_rw32(impl->num_directories); 828 } 829 830 /* XXX read only for now XXX */ 831 sbp->f_bavail = 0; 832 sbp->f_bresvd = 0; 833 834 /* tricky, next only aplies to ffs i think, so set to zero */ 835 sbp->f_ffree = 0; 836 sbp->f_favail = 0; 837 sbp->f_fresvd = 0; 838 839 mutex_exit(&ump->allocate_mutex); 840 841 copy_statvfs_info(sbp, mp); 842 return 0; 843 } 844 845 /* --------------------------------------------------------------------- */ 846 847 /* 848 * TODO what about writing out free space maps, lvid etc? only on `waitfor' 849 * i.e. explicit syncing by the user? 850 */ 851 852 static int 853 udf_sync_writeout_system_files(struct udf_mount *ump, int clearflags) 854 { 855 int error; 856 857 /* XXX lock for VAT en bitmaps? */ 858 /* metadata nodes are written synchronous */ 859 DPRINTF(CALL, ("udf_sync: syncing metadata\n")); 860 if (ump->lvclose & UDF_WRITE_VAT) 861 udf_writeout_vat(ump); 862 863 error = 0; 864 if (ump->lvclose & UDF_WRITE_PART_BITMAPS) { 865 /* writeout metadata spacetable if existing */ 866 error = udf_write_metadata_partition_spacetable(ump, MNT_WAIT); 867 if (error) 868 printf( "udf_writeout_system_files : " 869 " writeout of metadata space bitmap failed\n"); 870 871 /* writeout partition spacetables */ 872 error = udf_write_physical_partition_spacetables(ump, MNT_WAIT); 873 if (error) 874 printf( "udf_writeout_system_files : " 875 "writeout of space tables failed\n"); 876 if (!error && clearflags) 877 ump->lvclose &= ~UDF_WRITE_PART_BITMAPS; 878 } 879 880 return error; 881 } 882 883 884 int 885 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 886 { 887 struct udf_mount *ump = VFSTOUDF(mp); 888 889 DPRINTF(CALL, ("udf_sync called\n")); 890 /* if called when mounted readonly, just ignore */ 891 if (mp->mnt_flag & MNT_RDONLY) 892 return 0; 893 894 if (ump->syncing && !waitfor) { 895 printf("UDF: skipping autosync\n"); 896 return 0; 897 } 898 899 /* get sync lock */ 900 ump->syncing = 1; 901 902 /* pre-sync */ 903 udf_do_sync(ump, cred, waitfor); 904 905 if (waitfor == MNT_WAIT) 906 udf_sync_writeout_system_files(ump, true); 907 908 DPRINTF(CALL, ("end of udf_sync()\n")); 909 ump->syncing = 0; 910 911 return 0; 912 } 913 914 /* --------------------------------------------------------------------- */ 915 916 /* 917 * Get vnode for the file system type specific file id ino for the fs. Its 918 * used for reference to files by unique ID and for NFSv3. 919 * (optional) TODO lookup why some sources state NFSv3 920 */ 921 int 922 udf_vget(struct mount *mp, ino_t ino, 923 struct vnode **vpp) 924 { 925 DPRINTF(NOTIMPL, ("udf_vget called\n")); 926 return EOPNOTSUPP; 927 } 928 929 /* --------------------------------------------------------------------- */ 930 931 /* 932 * Lookup vnode for file handle specified 933 */ 934 int 935 udf_fhtovp(struct mount *mp, struct fid *fhp, 936 struct vnode **vpp) 937 { 938 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 939 return EOPNOTSUPP; 940 } 941 942 /* --------------------------------------------------------------------- */ 943 944 /* 945 * Create an unique file handle. Its structure is opaque and won't be used by 946 * other subsystems. It should uniquely identify the file in the filingsystem 947 * and enough information to know if a file has been removed and/or resources 948 * have been recycled. 949 */ 950 int 951 udf_vptofh(struct vnode *vp, struct fid *fid, 952 size_t *fh_size) 953 { 954 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 955 return EOPNOTSUPP; 956 } 957 958 /* --------------------------------------------------------------------- */ 959 960 /* 961 * Create a filingsystem snapshot at the specified timestamp. Could be 962 * implemented by explicitly creating a new session or with spare room in the 963 * integrity descriptor space 964 */ 965 int 966 udf_snapshot(struct mount *mp, struct vnode *vp, 967 struct timespec *tm) 968 { 969 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 970 return EOPNOTSUPP; 971 } 972 973 /* --------------------------------------------------------------------- */ 974