1 /* $NetBSD: udf_vfsops.c,v 1.14 2006/09/29 01:36:28 reinoud 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 1.14 2006/09/29 01:36:28 reinoud 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/sysctl.h> 67 #include <sys/kauth.h> 68 69 #include <fs/udf/ecma167-udf.h> 70 #include <fs/udf/udf_mount.h> 71 72 #include "udf.h" 73 #include "udf_subr.h" 74 #include "udf_bswap.h" 75 76 77 /* verbose levels of the udf filingsystem */ 78 int udf_verbose = UDF_DEBUGGING; 79 80 /* malloc regions */ 81 MALLOC_DEFINE(M_UDFMNT, "UDF mount", "UDF mount structures"); 82 MALLOC_DEFINE(M_UDFVOLD, "UDF volspace", "UDF volume space descriptors"); 83 MALLOC_DEFINE(M_UDFTEMP, "UDF temp", "UDF scrap space"); 84 struct pool udf_node_pool; 85 86 /* supported functions predefined */ 87 int udf_mountroot(void); 88 int udf_mount(struct mount *, const char *, void *, struct nameidata *, struct lwp *); 89 int udf_start(struct mount *, int, struct lwp *); 90 int udf_unmount(struct mount *, int, struct lwp *); 91 int udf_root(struct mount *, struct vnode **); 92 int udf_quotactl(struct mount *, int, uid_t, void *, struct lwp *); 93 int udf_statvfs(struct mount *, struct statvfs *, struct lwp *); 94 int udf_sync(struct mount *, int, kauth_cred_t, struct lwp *); 95 int udf_vget(struct mount *, ino_t, struct vnode **); 96 int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 97 int udf_checkexp(struct mount *, struct mbuf *, int *, kauth_cred_t *); 98 int udf_vptofh(struct vnode *, struct fid *, size_t *); 99 int udf_snapshot(struct mount *, struct vnode *, struct timespec *); 100 101 void udf_init(void); 102 void udf_reinit(void); 103 void udf_done(void); 104 105 106 /* internal functions */ 107 static int udf_mountfs(struct vnode *, struct mount *, struct lwp *, struct udf_args *); 108 #if 0 109 static int update_mp(struct mount *, struct udf_args *); 110 #endif 111 112 113 /* handies */ 114 #define VFSTOUDF(mp) ((struct udf_mount *)mp->mnt_data) 115 116 117 /* --------------------------------------------------------------------- */ 118 119 /* predefine vnode-op list descriptor */ 120 extern const struct vnodeopv_desc udf_vnodeop_opv_desc; 121 122 const struct vnodeopv_desc * const udf_vnodeopv_descs[] = { 123 &udf_vnodeop_opv_desc, 124 NULL, 125 }; 126 127 128 /* vfsops descriptor linked in as anchor point for the filingsystem */ 129 struct vfsops udf_vfsops = { 130 MOUNT_UDF, /* vfs_name */ 131 udf_mount, 132 udf_start, 133 udf_unmount, 134 udf_root, 135 udf_quotactl, 136 udf_statvfs, 137 udf_sync, 138 udf_vget, 139 udf_fhtovp, 140 udf_vptofh, 141 udf_init, 142 udf_reinit, 143 udf_done, 144 udf_mountroot, 145 udf_snapshot, 146 vfs_stdextattrctl, 147 udf_vnodeopv_descs, 148 0, /* int vfs_refcount */ 149 { NULL, NULL, }, /* LIST_ENTRY(vfsops) */ 150 }; 151 VFS_ATTACH(udf_vfsops); 152 153 154 /* --------------------------------------------------------------------- */ 155 156 /* file system starts here */ 157 void 158 udf_init(void) 159 { 160 size_t size; 161 162 #ifdef _LKM 163 malloc_type_attach(M_UDFMNT); 164 malloc_type_attach(M_UDFVOLD); 165 malloc_type_attach(M_UDFTEMP); 166 #endif 167 168 /* init hashtables and pools */ 169 size = sizeof(struct udf_node); 170 pool_init(&udf_node_pool, size, 0, 0, 0, "udf_node_pool", NULL); 171 } 172 173 /* --------------------------------------------------------------------- */ 174 175 void 176 udf_reinit(void) 177 { 178 /* recreate hashtables */ 179 /* reinit pool? */ 180 } 181 182 /* --------------------------------------------------------------------- */ 183 184 void 185 udf_done(void) 186 { 187 /* remove hashtables and pools */ 188 pool_destroy(&udf_node_pool); 189 190 #ifdef _LKM 191 malloc_type_detach(M_UDFMNT); 192 malloc_type_detach(M_UDFVOLD); 193 malloc_type_detach(M_UDFTEMP); 194 #endif 195 } 196 197 /* --------------------------------------------------------------------- */ 198 199 int 200 udf_mountroot(void) 201 { 202 return EOPNOTSUPP; 203 } 204 205 /* --------------------------------------------------------------------- */ 206 207 #define MPFREE(a, lst) \ 208 if ((a)) free((a), lst); 209 static void 210 free_udf_mountinfo(struct mount *mp) 211 { 212 struct udf_mount *ump; 213 int i; 214 215 ump = VFSTOUDF(mp); 216 if (ump) { 217 /* dispose of our descriptor pool */ 218 if (ump->desc_pool) 219 pool_destroy(ump->desc_pool); 220 221 /* clear our data */ 222 mp->mnt_data = NULL; 223 for (i = 0; i < UDF_ANCHORS; i++) 224 MPFREE(ump->anchors[i], M_UDFVOLD); 225 MPFREE(ump->primary_vol, M_UDFVOLD); 226 MPFREE(ump->logical_vol, M_UDFVOLD); 227 MPFREE(ump->unallocated, M_UDFVOLD); 228 MPFREE(ump->implementation, M_UDFVOLD); 229 MPFREE(ump->logvol_integrity, M_UDFVOLD); 230 for (i = 0; i < UDF_PARTITIONS; i++) 231 MPFREE(ump->partitions[i], M_UDFVOLD); 232 MPFREE(ump->fileset_desc, M_UDFVOLD); 233 MPFREE(ump->vat_table, M_UDFVOLD); 234 MPFREE(ump->sparing_table, M_UDFVOLD); 235 236 free(ump, M_UDFMNT); 237 } 238 } 239 #undef MPFREE 240 241 /* --------------------------------------------------------------------- */ 242 243 int 244 udf_mount(struct mount *mp, const char *path, 245 void *data, struct nameidata *ndp, struct lwp *l) 246 { 247 struct udf_args args; 248 struct udf_mount *ump; 249 struct vnode *devvp; 250 int openflags, accessmode, error; 251 252 DPRINTF(CALL, ("udf_mount called\n")); 253 254 if (mp->mnt_flag & MNT_GETARGS) { 255 /* request for the mount arguments */ 256 ump = VFSTOUDF(mp); 257 if (ump == NULL) 258 return EINVAL; 259 return copyout(&ump->mount_args, data, sizeof(args)); 260 } 261 262 /* handle request for updating mount parameters */ 263 /* TODO can't update my mountpoint yet */ 264 if (mp->mnt_flag & MNT_UPDATE) { 265 return EOPNOTSUPP; 266 } 267 268 /* OK, so we are asked to mount the device/file! */ 269 error = copyin(data, &args, sizeof(struct udf_args)); 270 if (error) 271 return error; 272 273 /* check/translate struct version */ 274 /* TODO sanity checking other mount arguments */ 275 if (args.version != 1) { 276 printf("mount_udf: unrecognized argument structure version\n"); 277 return EINVAL; 278 } 279 280 /* lookup name to get its vnode */ 281 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 282 error = namei(ndp); 283 if (error) 284 return error; 285 devvp = ndp->ni_vp; 286 287 #ifdef DEBUG 288 if (udf_verbose & UDF_DEBUG_VOLUMES) 289 vprint("UDF mount, trying to mount \n", devvp); 290 #endif 291 292 /* check if its a block device specified */ 293 if (devvp->v_type != VBLK) { 294 vrele(devvp); 295 return ENOTBLK; 296 } 297 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 298 vrele(devvp); 299 return ENXIO; 300 } 301 302 /* force read-only for now */ 303 mp->mnt_flag |= MNT_RDONLY; 304 305 /* 306 * If mount by non-root, then verify that user has necessary 307 * permissions on the device. 308 */ 309 if (kauth_cred_geteuid(l->l_cred) != 0) { 310 accessmode = VREAD; 311 if ((mp->mnt_flag & MNT_RDONLY) == 0) 312 accessmode |= VWRITE; 313 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 314 error = VOP_ACCESS(devvp, accessmode, l->l_cred, l); 315 VOP_UNLOCK(devvp, 0); 316 if (error) { 317 vrele(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 vrele(devvp); 330 return error; 331 } 332 if ((vcount(devvp) > 1) && (devvp != rootvp)) { 333 vrele(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 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 352 (void) VOP_CLOSE(devvp, openflags, NOCRED, l); 353 VOP_UNLOCK(devvp, 0); 354 } 355 } 356 if (error) { 357 /* devvp is still locked */ 358 vrele(devvp); 359 return error; 360 } 361 362 /* register our mountpoint being on this device */ 363 devvp->v_specmountpoint = mp; 364 365 /* successfully mounted */ 366 DPRINTF(VOLUMES, ("udf_mount() successfull\n")); 367 368 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 369 mp, l); 370 } 371 372 /* --------------------------------------------------------------------- */ 373 374 #ifdef DEBUG 375 static void 376 udf_unmount_sanity_check(struct mount *mp) 377 { 378 struct vnode *vp; 379 380 printf("On unmount, i found the following nodes:\n"); 381 LIST_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 382 vprint("", vp); 383 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 384 printf(" is locked\n"); 385 } 386 if (vp->v_usecount > 1) 387 printf(" more than one usecount %d\n", vp->v_usecount); 388 } 389 } 390 #endif 391 392 393 int 394 udf_unmount(struct mount *mp, int mntflags, struct lwp *l) 395 { 396 struct udf_mount *ump; 397 int error, flags, closeflags; 398 399 DPRINTF(CALL, ("udf_umount called\n")); 400 401 /* 402 * By specifying SKIPSYSTEM we can skip vnodes marked with VSYSTEM. 403 * This hardly documented feature allows us to exempt certain files 404 * from being flushed. 405 */ 406 flags = SKIPSYSTEM; /* allow for system vnodes to stay alive */ 407 if (mntflags & MNT_FORCE) 408 flags |= FORCECLOSE; 409 410 ump = VFSTOUDF(mp); 411 if (!ump) 412 panic("UDF unmount: empty ump\n"); 413 414 /* TODO remove these paranoid functions */ 415 #ifdef DEBUG 416 if (udf_verbose & UDF_DEBUG_LOCKING) 417 udf_unmount_sanity_check(mp); 418 #endif 419 420 if ((error = vflush(mp, NULLVP, flags)) != 0) 421 return error; 422 423 #ifdef DEBUG 424 if (udf_verbose & UDF_DEBUG_LOCKING) 425 udf_unmount_sanity_check(mp); 426 #endif 427 428 DPRINTF(VOLUMES, ("flush OK\n")); 429 430 /* 431 * TODO close logical volume and close session if requested. 432 * 433 * XXX no system nodes defined yet. Code to reclaim them is calling 434 * VOP_RECLAIM on the nodes themselves. 435 */ 436 437 /* close device */ 438 DPRINTF(VOLUMES, ("closing device\n")); 439 if (mp->mnt_flag & MNT_RDONLY) { 440 closeflags = FREAD; 441 } else { 442 closeflags = FREAD | FWRITE; 443 } 444 445 /* devvp is still locked by us */ 446 vn_lock(ump->devvp, LK_EXCLUSIVE | LK_RETRY); 447 error = VOP_CLOSE(ump->devvp, closeflags, NOCRED, l); 448 if (error) 449 printf("Error during closure of device! error %d, " 450 "device might stay locked\n", error); 451 DPRINTF(VOLUMES, ("device close ok\n")); 452 453 /* clear our mount reference and release device node */ 454 ump->devvp->v_specmountpoint = NULL; 455 vput(ump->devvp); 456 457 /* free ump struct */ 458 mp->mnt_data = NULL; 459 mp->mnt_flag &= ~MNT_LOCAL; 460 461 /* free up umt structure */ 462 free_udf_mountinfo(mp); 463 464 DPRINTF(VOLUMES, ("Fin unmount\n")); 465 return error; 466 } 467 468 /* --------------------------------------------------------------------- */ 469 470 /* 471 * Helper function of udf_mount() that actually mounts the disc. 472 */ 473 474 static int 475 udf_mountfs(struct vnode *devvp, struct mount *mp, 476 struct lwp *l, struct udf_args *args) 477 { 478 struct udf_mount *ump; 479 uint32_t sector_size, lb_size, bshift; 480 int num_anchors, error, lst; 481 482 /* flush out any old buffers remaining from a previous use. */ 483 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0))) 484 return error; 485 486 /* allocate udf part of mount structure; malloc allways succeeds */ 487 ump = malloc(sizeof(struct udf_mount), M_UDFMNT, M_WAITOK); 488 memset(ump, 0, sizeof(struct udf_mount)); 489 490 /* init locks */ 491 simple_lock_init(&ump->ihash_slock); 492 lockinit(&ump->get_node_lock, PINOD, "udf_getnode", 0, 0); 493 494 /* init `ino_t' to udf_node hash table */ 495 for (lst = 0; lst < UDF_INODE_HASHSIZE; lst++) { 496 LIST_INIT(&ump->udf_nodes[lst]); 497 } 498 499 /* set up linkage */ 500 mp->mnt_data = ump; 501 ump->vfs_mountp = mp; 502 503 /* set up arguments and device */ 504 ump->mount_args = *args; 505 ump->devvp = devvp; 506 if ((error = udf_update_discinfo(ump))) { 507 printf("UDF mount: error inspecting fs node\n"); 508 return error; 509 } 510 511 /* inspect sector size */ 512 sector_size = ump->discinfo.sector_size; 513 bshift = 1; 514 while ((1 << bshift) < sector_size) 515 bshift++; 516 if ((1 << bshift) != sector_size) { 517 printf("UDF mount: " 518 "hit NetBSD implementation fence on sector size\n"); 519 return EIO; 520 } 521 522 /* read all anchors to get volume descriptor sequence */ 523 num_anchors = udf_read_anchors(ump, args); 524 if (num_anchors == 0) 525 return ENOENT; 526 527 DPRINTF(VOLUMES, ("Read %d anchors on this disc, session %d\n", 528 num_anchors, args->sessionnr)); 529 530 /* read in volume descriptor sequence */ 531 if ((error = udf_read_vds_space(ump))) { 532 printf("UDF mount: error reading volume space\n"); 533 return error; 534 } 535 536 /* check consistency and completeness */ 537 if ((error = udf_process_vds(ump, args))) { 538 printf("UDF mount: disc not properly formatted\n"); 539 return error; 540 } 541 542 /* 543 * Initialise pool for descriptors associated with nodes. This is done 544 * in lb_size units though currently lb_size is dictated to be 545 * sector_size. 546 */ 547 lb_size = udf_rw32(ump->logical_vol->lb_size); 548 ump->desc_pool = malloc(sizeof(struct pool), M_UDFMNT, M_WAITOK); 549 memset(ump->desc_pool, 0, sizeof(struct pool)); 550 pool_init(ump->desc_pool, lb_size, 0, 0, 0, "udf_desc_pool", NULL); 551 552 /* read vds support tables like VAT, sparable etc. */ 553 if ((error = udf_read_vds_tables(ump, args))) { 554 printf("UDF mount: error in format or damaged disc\n"); 555 return error; 556 } 557 558 if ((error = udf_read_rootdirs(ump, args))) { 559 printf("UDF mount: " 560 "disc not properly formatted or damaged disc\n"); 561 return error; 562 } 563 564 /* setup rest of mount information */ 565 mp->mnt_data = ump; 566 mp->mnt_stat.f_fsidx.__fsid_val[0] = (uint32_t) devvp->v_rdev; 567 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_UDF); 568 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 569 mp->mnt_stat.f_namemax = UDF_MAX_NAMELEN; 570 mp->mnt_flag |= MNT_LOCAL; 571 572 /* bshift is allways equal to disc sector size */ 573 mp->mnt_dev_bshift = bshift; 574 mp->mnt_fs_bshift = bshift; 575 576 /* do we have to set this? */ 577 devvp->v_specmountpoint = mp; 578 579 /* success! */ 580 return 0; 581 } 582 583 /* --------------------------------------------------------------------- */ 584 585 int 586 udf_start(struct mount *mp, int flags, struct lwp *l) 587 { 588 /* do we have to do something here? */ 589 return 0; 590 } 591 592 /* --------------------------------------------------------------------- */ 593 594 int 595 udf_root(struct mount *mp, struct vnode **vpp) 596 { 597 struct vnode *vp; 598 struct long_ad *dir_loc; 599 struct udf_mount *ump = VFSTOUDF(mp); 600 struct udf_node *root_dir; 601 int error; 602 603 DPRINTF(CALL, ("udf_root called\n")); 604 605 dir_loc = &ump->fileset_desc->rootdir_icb; 606 error = udf_get_node(ump, dir_loc, &root_dir); 607 608 if (!root_dir) 609 error = ENOENT; 610 if (error) 611 return error; 612 613 vp = root_dir->vnode; 614 simple_lock(&vp->v_interlock); 615 root_dir->vnode->v_flag |= VROOT; 616 simple_unlock(&vp->v_interlock); 617 618 *vpp = vp; 619 return 0; 620 } 621 622 /* --------------------------------------------------------------------- */ 623 624 int 625 udf_quotactl(struct mount *mp, int cmds, uid_t uid, void *arg, struct lwp *l) 626 { 627 DPRINTF(NOTIMPL, ("udf_quotactl called\n")); 628 return EOPNOTSUPP; 629 } 630 631 /* --------------------------------------------------------------------- */ 632 633 int 634 udf_statvfs(struct mount *mp, struct statvfs *sbp, struct lwp *l) 635 { 636 struct udf_mount *ump = VFSTOUDF(mp); 637 struct logvol_int_desc *lvid; 638 struct udf_logvol_info *impl; 639 uint64_t freeblks, sizeblks; 640 uint32_t *pos1, *pos2; 641 int part, num_part; 642 643 DPRINTF(CALL, ("udf_statvfs called\n")); 644 sbp->f_flag = mp->mnt_flag; 645 sbp->f_bsize = ump->discinfo.sector_size; 646 sbp->f_frsize = ump->discinfo.sector_size; 647 sbp->f_iosize = ump->discinfo.sector_size; 648 649 /* TODO integrity locking */ 650 /* free and used space for mountpoint based on logvol integrity */ 651 lvid = ump->logvol_integrity; 652 if (lvid) { 653 num_part = udf_rw32(lvid->num_part); 654 impl = (struct udf_logvol_info *) (lvid->tables + 2*num_part); 655 656 freeblks = sizeblks = 0; 657 for (part=0; part < num_part; part++) { 658 pos1 = &lvid->tables[0] + part; 659 pos2 = &lvid->tables[0] + num_part + part; 660 if (udf_rw32(*pos1) != (uint32_t) -1) { 661 freeblks += udf_rw32(*pos1); 662 sizeblks += udf_rw32(*pos2); 663 } 664 } 665 sbp->f_blocks = sizeblks; 666 sbp->f_bfree = freeblks; 667 sbp->f_files = udf_rw32(impl->num_files); 668 sbp->f_files += udf_rw32(impl->num_directories); 669 670 /* XXX read only for now XXX */ 671 sbp->f_bavail = 0; 672 sbp->f_bresvd = 0; 673 674 /* tricky, next only aplies to ffs i think, so set to zero */ 675 sbp->f_ffree = 0; 676 sbp->f_favail = 0; 677 sbp->f_fresvd = 0; 678 } 679 680 copy_statvfs_info(sbp, mp); 681 return 0; 682 } 683 684 /* --------------------------------------------------------------------- */ 685 686 int 687 udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *p) 688 { 689 DPRINTF(CALL, ("udf_sync called\n")); 690 /* nothing to be done as upto now read-only */ 691 return 0; 692 } 693 694 /* --------------------------------------------------------------------- */ 695 696 /* 697 * Get vnode for the file system type specific file id ino for the fs. Its 698 * used for reference to files by unique ID and for NFSv3. 699 * (optional) TODO lookup why some sources state NFSv3 700 */ 701 int 702 udf_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 703 { 704 DPRINTF(NOTIMPL, ("udf_vget called\n")); 705 return EOPNOTSUPP; 706 } 707 708 /* --------------------------------------------------------------------- */ 709 710 /* 711 * Lookup vnode for file handle specified 712 */ 713 int 714 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 715 { 716 DPRINTF(NOTIMPL, ("udf_fhtovp called\n")); 717 return EOPNOTSUPP; 718 } 719 720 /* --------------------------------------------------------------------- */ 721 722 /* 723 * Create an unique file handle. Its structure is opaque and won't be used by 724 * other subsystems. It should uniquely identify the file in the filingsystem 725 * and enough information to know if a file has been removed and/or resources 726 * have been recycled. 727 */ 728 int 729 udf_vptofh(struct vnode *vp, struct fid *fid, size_t *fh_size) 730 { 731 DPRINTF(NOTIMPL, ("udf_vptofh called\n")); 732 return EOPNOTSUPP; 733 } 734 735 /* --------------------------------------------------------------------- */ 736 737 /* 738 * Create a filingsystem snapshot at the specified timestamp. Could be 739 * implemented by explicitly creating a new session or with spare room in the 740 * integrity descriptor space 741 */ 742 int 743 udf_snapshot(struct mount *mp, struct vnode *vp, struct timespec *tm) 744 { 745 DPRINTF(NOTIMPL, ("udf_snapshot called\n")); 746 return EOPNOTSUPP; 747 } 748 749 /* --------------------------------------------------------------------- */ 750 751 /* 752 * If running a DEBUG kernel, provide an easy way to set the debug flags when 753 * running into a problem. 754 */ 755 756 #ifdef DEBUG 757 #define UDF_VERBOSE_SYSCTLOPT 1 758 759 SYSCTL_SETUP(sysctl_vfs_udf_setup, "sysctl vfs.udf subtree setup") 760 { 761 /* 762 * XXX the "24" below could be dynamic, thereby eliminating one 763 * more instance of the "number to vfs" mapping problem, but 764 * "24" is the order as taken from sys/mount.h 765 */ 766 767 sysctl_createv(clog, 0, NULL, NULL, 768 CTLFLAG_PERMANENT, 769 CTLTYPE_NODE, "vfs", NULL, 770 NULL, 0, NULL, 0, 771 CTL_VFS, CTL_EOL); 772 sysctl_createv(clog, 0, NULL, NULL, 773 CTLFLAG_PERMANENT, 774 CTLTYPE_NODE, "udf", 775 SYSCTL_DESCR("OSTA Universal File System"), 776 NULL, 0, NULL, 0, 777 CTL_VFS, 24, CTL_EOL); 778 779 sysctl_createv(clog, 0, NULL, NULL, 780 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 781 CTLTYPE_INT, "verbose", 782 SYSCTL_DESCR("Bitmask for filesystem debugging"), 783 NULL, 0, &udf_verbose, 0, 784 CTL_VFS, 24, UDF_VERBOSE_SYSCTLOPT, CTL_EOL); 785 } 786 787 #endif /* DEBUG */ 788 789