1 /* $NetBSD: udf_vfsops.c,v 1.6 2006/06/12 00:20:21 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2006 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.NetBSD.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 */ 35 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: udf_vfsops.c,v 1.6 2006/06/12 00:20:21 christos Exp $"); 40 #endif /* not lint */ 41 42 43 #if defined(_KERNEL_OPT) 44 #include "opt_quota.h" 45 #include "opt_compat_netbsd.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/sysctl.h> 51 #include <sys/namei.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/vnode.h> 55 #include <miscfs/specfs/specdev.h> 56 #include <sys/mount.h> 57 #include <sys/buf.h> 58 #include <sys/file.h> 59 #include <sys/device.h> 60 #include <sys/disklabel.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/dirent.h> 64 #include <sys/stat.h> 65 #include <sys/conf.h> 66 #include <sys/kauth.h> 67 68 #include <fs/udf/ecma167-udf.h> 69 #include <fs/udf/udf_mount.h> 70 71 #include "udf.h" 72 #include "udf_subr.h" 73 #include "udf_bswap.h" 74 75 76 /* verbose levels of the udf filingsystem */ 77 int udf_verbose = UDF_DEBUGGING; 78 79 /* malloc regions */ 80 MALLOC_DEFINE(M_UDFMNT, "UDF mount", "UDF mount structures"); 81 MALLOC_DEFINE(M_UDFVOLD, "UDF volspace", "UDF volume space descriptors"); 82 MALLOC_DEFINE(M_UDFTEMP, "UDF temp", "UDF scrap space"); 83 struct pool udf_node_pool; 84 85 /* supported functions predefined */ 86 int udf_mountroot(void); 87 int udf_mount(struct mount *, const char *, void *, struct nameidata *, struct lwp *); 88 int udf_start(struct mount *, int, struct lwp *); 89 int udf_unmount(struct mount *, int, struct lwp *); 90 int udf_root(struct mount *, struct vnode **); 91 int udf_quotactl(struct mount *, int, uid_t, void *, struct lwp *); 92 int udf_statvfs(struct mount *, struct statvfs *, struct lwp *); 93 int udf_sync(struct mount *, int, kauth_cred_t, struct lwp *); 94 int udf_vget(struct mount *, ino_t, struct vnode **); 95 int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 96 int udf_checkexp(struct mount *, struct mbuf *, int *, kauth_cred_t *); 97 int udf_vptofh(struct vnode *, struct fid *); 98 int udf_snapshot(struct mount *, struct vnode *, struct timespec *); 99 100 void udf_init(void); 101 void udf_reinit(void); 102 void udf_done(void); 103 104 105 /* internal functions */ 106 static int udf_mountfs(struct vnode *, struct mount *, struct lwp *, struct udf_args *); 107 #if 0 108 static int update_mp(struct mount *, struct udf_args *); 109 #endif 110 111 112 /* handies */ 113 #define VFSTOUDF(mp) ((struct udf_mount *)mp->mnt_data) 114 115 116 /* --------------------------------------------------------------------- */ 117 118 /* predefine vnode-op list descriptor */ 119 extern const struct vnodeopv_desc udf_vnodeop_opv_desc; 120 121 const struct vnodeopv_desc * const udf_vnodeopv_descs[] = { 122 &udf_vnodeop_opv_desc, 123 NULL, 124 }; 125 126 127 /* vfsops descriptor linked in as anchor point for the filingsystem */ 128 struct vfsops udf_vfsops = { 129 MOUNT_UDF, /* vfs_name */ 130 udf_mount, 131 udf_start, 132 udf_unmount, 133 udf_root, 134 udf_quotactl, 135 udf_statvfs, 136 udf_sync, 137 udf_vget, 138 udf_fhtovp, 139 udf_vptofh, 140 udf_init, 141 udf_reinit, 142 udf_done, 143 udf_mountroot, 144 udf_snapshot, 145 vfs_stdextattrctl, 146 udf_vnodeopv_descs, 147 /* int vfs_refcount */ 148 /* LIST_ENTRY(vfsops) */ 149 }; 150 VFS_ATTACH(udf_vfsops); 151 152 153 /* --------------------------------------------------------------------- */ 154 155 /* file system starts here */ 156 void 157 udf_init(void) 158 { 159 size_t size; 160 161 #ifdef _LKM 162 malloc_type_attach(M_UDFMNT); 163 malloc_type_attach(M_UDFVOLD); 164 malloc_type_attach(M_UDFTEMP); 165 #endif 166 167 /* init hashtables and pools */ 168 size = sizeof(struct udf_node); 169 pool_init(&udf_node_pool, size, 0, 0, 0, "udf_node_pool", NULL); 170 } 171 172 /* --------------------------------------------------------------------- */ 173 174 void 175 udf_reinit(void) 176 { 177 /* recreate hashtables */ 178 /* reinit pool? */ 179 } 180 181 /* --------------------------------------------------------------------- */ 182 183 void 184 udf_done(void) 185 { 186 /* remove hashtables and pools */ 187 pool_destroy(&udf_node_pool); 188 189 #ifdef _LKM 190 malloc_type_detach(M_UDFMNT); 191 malloc_type_detach(M_UDFVOLD); 192 malloc_type_detach(M_UDFTEMP); 193 #endif 194 } 195 196 /* --------------------------------------------------------------------- */ 197 198 int 199 udf_mountroot(void) 200 { 201 return EOPNOTSUPP; 202 } 203 204 /* --------------------------------------------------------------------- */ 205 206 #define MPFREE(a, lst) \ 207 if ((a)) free((a), lst); 208 static void 209 free_udf_mountinfo(struct mount *mp) 210 { 211 struct udf_mount *ump; 212 int i; 213 214 ump = VFSTOUDF(mp); 215 if (ump) { 216 mp->mnt_data = NULL; 217 for (i = 0; i < UDF_ANCHORS; i++) 218 MPFREE(ump->anchors[i], M_UDFVOLD); 219 MPFREE(ump->primary_vol, M_UDFVOLD); 220 MPFREE(ump->logical_vol, M_UDFVOLD); 221 MPFREE(ump->unallocated, M_UDFVOLD); 222 MPFREE(ump->implementation, M_UDFVOLD); 223 MPFREE(ump->logvol_integrity, M_UDFVOLD); 224 for (i = 0; i < UDF_PARTITIONS; i++) 225 MPFREE(ump->partitions[i], M_UDFVOLD); 226 MPFREE(ump->fileset_desc, M_UDFVOLD); 227 MPFREE(ump->vat_table, M_UDFVOLD); 228 MPFREE(ump->sparing_table, M_UDFVOLD); 229 230 /* 231 * Note that the node related (e)fe descriptors pool is 232 * destroyed already if it was used. 233 */ 234 235 free(ump, M_UDFMNT); 236 } 237 } 238 #undef MPFREE 239 240 /* --------------------------------------------------------------------- */ 241 242 int 243 udf_mount(struct mount *mp, const char *path, 244 void *data, struct nameidata *ndp, struct lwp *l) 245 { 246 struct udf_args args; 247 struct udf_mount *ump; 248 struct vnode *devvp; 249 struct proc *p; 250 int openflags, accessmode, error; 251 252 DPRINTF(CALL, ("udf_mount called\n")); 253 254 p = l->l_proc; 255 if (mp->mnt_flag & MNT_GETARGS) { 256 /* request for the mount arguments */ 257 ump = VFSTOUDF(mp); 258 if (ump == NULL) 259 return EINVAL; 260 return copyout(&ump->mount_args, data, sizeof(args)); 261 } 262 263 /* handle request for updating mount parameters */ 264 /* TODO can't update my mountpoint yet */ 265 if (mp->mnt_flag & MNT_UPDATE) { 266 return EOPNOTSUPP; 267 } 268 269 /* OK, so we are asked to mount the device/file! */ 270 error = copyin(data, &args, sizeof(struct udf_args)); 271 if (error) 272 return error; 273 274 /* check/translate struct version */ 275 /* TODO sanity checking other mount arguments */ 276 if (args.version != 1) { 277 printf("mount_udf: unrecognized argument structure version\n"); 278 return EINVAL; 279 } 280 281 /* lookup name to get its vnode */ 282 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, args.fspec, l); 283 error = namei(ndp); 284 if (error) 285 return error; 286 287 /* devvp is *locked* now */ 288 devvp = ndp->ni_vp; 289 #ifdef DEBUG 290 if (udf_verbose & UDF_DEBUG_VOLUMES) 291 vprint("UDF mount, trying to mount \n", devvp); 292 #endif 293 294 /* check if its a block device specified */ 295 if (devvp->v_type != VBLK) { 296 vrele(devvp); 297 return ENOTBLK; 298 } 299 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 300 vrele(devvp); 301 return ENXIO; 302 } 303 304 /* force read-only for now */ 305 mp->mnt_flag |= MNT_RDONLY; 306 307 /* 308 * If mount by non-root, then verify that user has necessary 309 * permissions on the device. 310 */ 311 if (kauth_cred_geteuid(p->p_cred) != 0) { 312 accessmode = VREAD; 313 if ((mp->mnt_flag & MNT_RDONLY) == 0) 314 accessmode |= VWRITE; 315 error = VOP_ACCESS(devvp, accessmode, p->p_cred, l); 316 if (error) { 317 vput(devvp); 318 return (error); 319 } 320 } 321 322 /* 323 * Disallow multiple mounts of the same device. Disallow mounting of 324 * a device that is currently in use (except for root, which might 325 * share swap device for miniroot). 326 */ 327 error = vfs_mountedon(devvp); 328 if (error) { 329 vput(devvp); 330 return error; 331 } 332 if ((vcount(devvp) > 1) && (devvp != rootvp)) { 333 vput(devvp); 334 return EBUSY; 335 } 336 337 /* 338 * Open device and try to mount it! 339 */ 340 if (mp->mnt_flag & MNT_RDONLY) { 341 openflags = FREAD; 342 } else { 343 openflags = FREAD | FWRITE; 344 } 345 error = VOP_OPEN(devvp, openflags, FSCRED, l); 346 if (error == 0) { 347 /* opened ok, try mounting */ 348 error = udf_mountfs(devvp, mp, l, &args); 349 if (error) { 350 free_udf_mountinfo(mp); 351 /* devvp is still locked */ 352 (void) VOP_CLOSE(devvp, openflags, NOCRED, l); 353 } 354 } 355 if (error) { 356 /* devvp is still locked */ 357 vput(devvp); 358 return error; 359 } 360 361 /* register our mountpoint being on this device */ 362 devvp->v_specmountpoint = mp; 363 364 /* successfully mounted */ 365 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 366 367 /* unlock it but dont deref it */ 368 VOP_UNLOCK(devvp, 0); 369 370 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, mp, l); 371 } 372 373 /* --------------------------------------------------------------------- */ 374 375 #ifdef DEBUG 376 static void 377 udf_unmount_sanity_check(struct mount *mp) 378 { 379 struct vnode *vp; 380 381 printf("On unmount, i found the following nodes:\n"); 382 LIST_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 383 vprint("", vp); 384 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 385 printf(" is locked\n"); 386 } 387 if (vp->v_usecount > 1) 388 printf(" more than one usecount %d\n", vp->v_usecount); 389 } 390 } 391 #endif 392 393 394 int 395 udf_unmount(struct mount *mp, int mntflags, struct lwp *l) 396 { 397 struct udf_mount *ump; 398 int error, flags, closeflags; 399 400 DPRINTF(CALL, ("udf_umount called\n")); 401 402 /* 403 * By specifying SKIPSYSTEM we can skip vnodes marked with VSYSTEM. 404 * This hardly documented feature allows us to exempt certain files 405 * from being flushed. 406 */ 407 flags = SKIPSYSTEM; /* allow for system vnodes to stay alive */ 408 if (mntflags & MNT_FORCE) 409 flags |= FORCECLOSE; 410 411 ump = VFSTOUDF(mp); 412 if (!ump) 413 panic("UDF unmount: empty ump\n"); 414 415 /* TODO remove these paranoid functions */ 416 #ifdef DEBUG 417 if (udf_verbose & UDF_DEBUG_LOCKING) 418 udf_unmount_sanity_check(mp); 419 #endif 420 421 if ((error = vflush(mp, NULLVP, flags)) != 0) 422 return error; 423 424 #ifdef DEBUG 425 if (udf_verbose & UDF_DEBUG_LOCKING) 426 udf_unmount_sanity_check(mp); 427 #endif 428 429 DPRINTF(VOLUMES, ("flush OK\n")); 430 431 /* 432 * TODO close logical volume and close session if requested. 433 * 434 * XXX no system nodes defined yet. Code to reclaim them is calling 435 * VOP_RECLAIM on the nodes themselves. 436 */ 437 438 /* dispose of our descriptor pool */ 439 pool_destroy(&ump->desc_pool); 440 441 /* close device */ 442 DPRINTF(VOLUMES, ("closing device\n")); 443 if (mp->mnt_flag & MNT_RDONLY) { 444 closeflags = FREAD; 445 } else { 446 closeflags = FREAD | FWRITE; 447 } 448 449 /* devvp is still locked by us */ 450 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 451 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED, l); 452 if (error) 453 printf("Error during closure of device! error %d, " 454 "device might stay locked\n", error); 455 DPRINTF(VOLUMES, ("device close ok\n")); 456 457 /* clear our mount reference and release device node */ 458 ump->devvp->v_specmountpoint = NULL; 459 vput(ump->devvp); 460 461 /* free ump struct */ 462 mp->mnt_data = NULL; 463 mp->mnt_flag &= ~MNT_LOCAL; 464 465 /* free up umt structure */ 466 free_udf_mountinfo(mp); 467 468 DPRINTF(VOLUMES, ("Fin unmount\n")); 469 return error; 470 } 471 472 /* --------------------------------------------------------------------- */ 473 474 /* 475 * Helper function of udf_mount() that actually mounts the disc. 476 */ 477 478 static int 479 udf_mountfs(struct vnode *devvp, struct mount *mp, 480 struct lwp *l, struct udf_args *args) 481 { 482 struct udf_mount *ump; 483 uint32_t sector_size, lb_size, bshift; 484 int num_anchors, error, lst; 485 486 /* flush out any old buffers remaining from a previous use. */ 487 error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_cred, l, 0, 0); 488 if (error) 489 return error; 490 491 /* allocate udf part of mount structure; malloc allways succeeds */ 492 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK); 493 memset(ump, 0, sizeof(struct udf_mount)); 494 495 /* init locks */ 496 simple_lock_init(&ump->ihash_slock); 497 lockinit(&ump->get_node_lock, PINOD, "udf_getnode", 0, 0); 498 499 /* init `ino_t' to udf_node hash table */ 500 for (lst = 0; lst < UDF_INODE_HASHSIZE; lst++) { 501 LIST_INIT(&ump->udf_nodes[lst]); 502 } 503 504 /* set up linkage */ 505 mp->mnt_data = ump; 506 ump->vfs_mountp = mp; 507 508 /* set up arguments and device */ 509 ump->mount_args = *args; 510 ump->devvp = devvp; 511 error = udf_update_discinfo(ump); 512 513 if (error) { 514 printf("UDF mount: error inspecting fs node\n"); 515 return error; 516 } 517 518 /* inspect sector size */ 519 sector_size = ump->discinfo.sector_size; 520 bshift = 1; 521 while ((1 << bshift) < sector_size) 522 bshift++; 523 if ((1 << bshift) != sector_size) { 524 printf("UDF mount: " 525 "hit NetBSD implementation fence on sector size\n"); 526 return EIO; 527 } 528 529 /* read all anchors to get volume descriptor sequence */ 530 num_anchors = udf_read_anchors(ump, args); 531 if (num_anchors == 0) 532 return ENOENT; 533 534 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 535 num_anchors, args->sessionnr)); 536 537 /* read in volume descriptor sequence */ 538 error = udf_read_vds_space(ump); 539 if (error) 540 printf("UDF mount: error reading volume space\n"); 541 542 /* check consistency and completeness */ 543 if (!error) { 544 error = udf_process_vds(ump, args); 545 if (error) 546 printf("UDF mount: disc not properly formatted\n"); 547 } 548 549 /* 550 * Initialise pool for descriptors associated with nodes. This is done 551 * in lb_size units though currently lb_size is dictated to be 552 * sector_size. 553 */ 554 lb_size = udf_rw32(ump->logical_vol->lb_size); 555 pool_init(&ump->desc_pool, lb_size, 0, 0, 0, "udf_desc_pool", NULL); 556 557 /* read vds support tables like VAT, sparable etc. */ 558 if (!error) { 559 error = udf_read_vds_tables(ump, args); 560 if (error) 561 printf("UDF mount: error in format or damaged disc\n"); 562 } 563 if (!error) { 564 error = udf_read_rootdirs(ump, args); 565 if (error) 566 printf("UDF mount: " 567 "disc not properly formatted or damaged disc\n"); 568 } 569 if (error) 570 return error; 571 572 /* setup rest of mount information */ 573 mp->mnt_data = ump; 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_MAX_NAMELEN; 578 mp->mnt_flag |= MNT_LOCAL; 579 580 /* bshift is allways equal to disc sector size */ 581 mp->mnt_dev_bshift = bshift; 582 mp->mnt_fs_bshift = bshift; 583 584 /* do we have to set this? */ 585 devvp->v_specmountpoint = mp; 586 587 /* success! */ 588 return 0; 589 } 590 591 /* --------------------------------------------------------------------- */ 592 593 int 594 udf_start(struct mount *mp, int flags, struct lwp *l) 595 { 596 /* do we have to do something here? */ 597 return 0; 598 } 599 600 /* --------------------------------------------------------------------- */ 601 602 int 603 udf_root(struct mount *mp, struct vnode **vpp) 604 { 605 struct vnode *vp; 606 struct long_ad *dir_loc; 607 struct udf_mount *ump = VFSTOUDF(mp); 608 struct udf_node *root_dir; 609 int error; 610 611 DPRINTF(CALL, ("udf_root called\n")); 612 613 dir_loc = &ump->fileset_desc->rootdir_icb; 614 error = udf_get_node(ump, dir_loc, &root_dir); 615 616 if (!root_dir) 617 error = ENOENT; 618 if (error) 619 return error; 620 621 vp = root_dir->vnode; 622 simple_lock(&vp->v_interlock); 623 root_dir->vnode->v_flag |= VROOT; 624 simple_unlock(&vp->v_interlock); 625 626 *vpp = vp; 627 return 0; 628 } 629 630 /* --------------------------------------------------------------------- */ 631 632 int 633 udf_quotactl(struct mount *mp, int cmds, uid_t uid, void *arg, struct lwp *l) 634 { 635 DPRINTF(NOTIMPL, ("udf_quotactl called\n")); 636 return EOPNOTSUPP; 637 } 638 639 /* --------------------------------------------------------------------- */ 640 641 int 642 udf_statvfs(struct mount *mp, struct statvfs *sbp, struct lwp *l) 643 { 644 struct udf_mount *ump = VFSTOUDF(mp); 645 struct logvol_int_desc *lvid; 646 struct udf_logvol_info *impl; 647 uint64_t freeblks, sizeblks; 648 uint32_t *pos1, *pos2; 649 int part, num_part; 650 651 DPRINTF(CALL, ("udf_statvfs called\n")); 652 sbp->f_flag = mp->mnt_flag; 653 sbp->f_bsize = ump->discinfo.sector_size; 654 sbp->f_frsize = ump->discinfo.sector_size; 655 sbp->f_iosize = ump->discinfo.sector_size; 656 657 /* TODO integrity locking */ 658 /* free and used space for mountpoint based on logvol integrity */ 659 lvid = ump->logvol_integrity; 660 if (lvid) { 661 num_part = udf_rw32(lvid->num_part); 662 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 663 664 freeblks = sizeblks = 0; 665 for (part=0; part < num_part; part++) { 666 pos1 = &lvid->tables[0] + part; 667 pos2 = &lvid->tables[0] + num_part + part; 668 if (udf_rw32(*pos1) != (uint32_t) -1) { 669 freeblks += udf_rw32(*pos1); 670 sizeblks += udf_rw32(*pos2); 671 } 672 } 673 sbp->f_blocks = sizeblks; 674 sbp->f_bfree = freeblks; 675 sbp->f_files = udf_rw32(impl->num_files); 676 sbp->f_files += udf_rw32(impl->num_directories); 677 678 /* XXX read only for now XXX */ 679 sbp->f_bavail = 0; 680 sbp->f_bresvd = 0; 681 682 /* tricky, next only aplies to ffs i think, so set to zero */ 683 sbp->f_ffree = 0; 684 sbp->f_favail = 0; 685 sbp->f_fresvd = 0; 686 } 687 688 copy_statvfs_info(sbp, mp); 689 return 0; 690 } 691 692 /* --------------------------------------------------------------------- */ 693 694 int 695 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *p) 696 { 697 DPRINTF(CALL, ("udf_sync called\n")); 698 /* nothing to be done as upto now read-only */ 699 return 0; 700 } 701 702 /* --------------------------------------------------------------------- */ 703 704 /* 705 * Get vnode for the file system type specific file id ino for the fs. Its 706 * used for reference to files by unique ID and for NFSv3. 707 * (optional) TODO lookup why some sources state NFSv3 708 */ 709 int 710 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 711 { 712 DPRINTF(NOTIMPL, ("udf_vget called\n")); 713 return EOPNOTSUPP; 714 } 715 716 /* --------------------------------------------------------------------- */ 717 718 /* 719 * Lookup vnode for file handle specified 720 */ 721 int 722 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 723 { 724 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 725 return EOPNOTSUPP; 726 } 727 728 /* --------------------------------------------------------------------- */ 729 730 /* 731 * Create an unique file handle. Its structure is opaque and won't be used by 732 * other subsystems. It should uniquely identify the file in the filingsystem 733 * and enough information to know if a file has been removed and/or resources 734 * have been recycled. 735 */ 736 int 737 udf_vptofh(struct vnode *vp, struct fid *fid) 738 { 739 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 740 return EOPNOTSUPP; 741 } 742 743 /* --------------------------------------------------------------------- */ 744 745 /* 746 * Create a filingsystem snapshot at the specified timestamp. Could be 747 * implemented by explicitly creating a new session or with spare room in the 748 * integrity descriptor space 749 */ 750 int 751 udf_snapshot(struct mount *mp, struct vnode *vp, struct timespec *tm) 752 { 753 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 754 return EOPNOTSUPP; 755 } 756 757 758