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sys/fs/ntfs/ntfs_vfsops.c
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1 /* $NetBSD: ntfs_vfsops.c,v 1.110 2020/04/13 19:23:18 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 Semen Ustimenko 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * Id: ntfs_vfsops.c,v 1.7 1999/05/31 11:28:30 phk Exp 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: ntfs_vfsops.c,v 1.110 2020/04/13 19:23:18 ad Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/namei.h> 37 #include <sys/proc.h> 38 #include <sys/kernel.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/buf.h> 42 #include <sys/fcntl.h> 43 #include <sys/malloc.h> 44 #include <sys/sysctl.h> 45 #include <sys/device.h> 46 #include <sys/conf.h> 47 #include <sys/kauth.h> 48 #include <sys/module.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #include <miscfs/genfs/genfs.h> 53 #include <miscfs/specfs/specdev.h> 54 55 #include <fs/ntfs/ntfs.h> 56 #include <fs/ntfs/ntfs_inode.h> 57 #include <fs/ntfs/ntfs_subr.h> 58 #include <fs/ntfs/ntfs_vfsops.h> 59 #include <fs/ntfs/ntfs_ihash.h> 60 #include <fs/ntfs/ntfsmount.h> 61 62 MODULE(MODULE_CLASS_VFS, ntfs, NULL); 63 64 MALLOC_JUSTDEFINE(M_NTFSMNT, "NTFS mount", "NTFS mount structure"); 65 MALLOC_JUSTDEFINE(M_NTFSNTNODE,"NTFS ntnode", "NTFS ntnode information"); 66 MALLOC_JUSTDEFINE(M_NTFSDIR,"NTFS dir", "NTFS dir buffer"); 67 68 static int ntfs_superblock_validate(struct ntfsmount *); 69 static int ntfs_mount(struct mount *, const char *, void *, size_t *); 70 static int ntfs_root(struct mount *, int, struct vnode **); 71 static int ntfs_start(struct mount *, int); 72 static int ntfs_statvfs(struct mount *, struct statvfs *); 73 static int ntfs_sync(struct mount *, int, kauth_cred_t); 74 static int ntfs_unmount(struct mount *, int); 75 static int ntfs_vget(struct mount *mp, ino_t ino, int, 76 struct vnode **vpp); 77 static int ntfs_loadvnode(struct mount *, struct vnode *, 78 const void *, size_t, const void **); 79 static int ntfs_mountfs(struct vnode *, struct mount *, 80 struct ntfs_args *, struct lwp *); 81 static int ntfs_vptofh(struct vnode *, struct fid *, size_t *); 82 83 static void ntfs_init(void); 84 static void ntfs_reinit(void); 85 static void ntfs_done(void); 86 static int ntfs_fhtovp(struct mount *, struct fid *, int, 87 struct vnode **); 88 static int ntfs_mountroot(void); 89 90 static const struct genfs_ops ntfs_genfsops = { 91 .gop_write = genfs_compat_gop_write, 92 }; 93 94 static struct sysctllog *ntfs_sysctl_log; 95 96 static int 97 ntfs_mountroot(void) 98 { 99 struct mount *mp; 100 struct lwp *l = curlwp; /* XXX */ 101 int error; 102 struct ntfs_args args; 103 104 if (device_class(root_device) != DV_DISK) 105 return (ENODEV); 106 107 if ((error = vfs_rootmountalloc(MOUNT_NTFS, "root_device", &mp))) { 108 vrele(rootvp); 109 return (error); 110 } 111 112 args.flag = 0; 113 args.uid = 0; 114 args.gid = 0; 115 args.mode = 0777; 116 117 if ((error = ntfs_mountfs(rootvp, mp, &args, l)) != 0) { 118 vfs_unbusy(mp); 119 vfs_rele(mp); 120 return (error); 121 } 122 123 mountlist_append(mp); 124 (void)ntfs_statvfs(mp, &mp->mnt_stat); 125 vfs_unbusy(mp); 126 return (0); 127 } 128 129 static void 130 ntfs_init(void) 131 { 132 133 malloc_type_attach(M_NTFSMNT); 134 malloc_type_attach(M_NTFSNTNODE); 135 malloc_type_attach(M_NTFSDIR); 136 malloc_type_attach(M_NTFSNTVATTR); 137 malloc_type_attach(M_NTFSRDATA); 138 malloc_type_attach(M_NTFSDECOMP); 139 malloc_type_attach(M_NTFSRUN); 140 ntfs_nthashinit(); 141 ntfs_toupper_init(); 142 } 143 144 static void 145 ntfs_reinit(void) 146 { 147 ntfs_nthashreinit(); 148 } 149 150 static void 151 ntfs_done(void) 152 { 153 ntfs_nthashdone(); 154 malloc_type_detach(M_NTFSMNT); 155 malloc_type_detach(M_NTFSNTNODE); 156 malloc_type_detach(M_NTFSDIR); 157 malloc_type_detach(M_NTFSNTVATTR); 158 malloc_type_detach(M_NTFSRDATA); 159 malloc_type_detach(M_NTFSDECOMP); 160 malloc_type_detach(M_NTFSRUN); 161 } 162 163 static int 164 ntfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 165 { 166 struct lwp *l = curlwp; 167 int err = 0, flags; 168 struct vnode *devvp; 169 struct ntfs_args *args = data; 170 171 if (args == NULL) 172 return EINVAL; 173 if (*data_len < sizeof *args) 174 return EINVAL; 175 176 if (mp->mnt_flag & MNT_GETARGS) { 177 struct ntfsmount *ntmp = VFSTONTFS(mp); 178 if (ntmp == NULL) 179 return EIO; 180 args->fspec = NULL; 181 args->uid = ntmp->ntm_uid; 182 args->gid = ntmp->ntm_gid; 183 args->mode = ntmp->ntm_mode; 184 args->flag = ntmp->ntm_flag; 185 *data_len = sizeof *args; 186 return 0; 187 } 188 /* 189 *** 190 * Mounting non-root file system or updating a file system 191 *** 192 */ 193 194 /* 195 * If updating, check whether changing from read-only to 196 * read/write; if there is no device name, that's all we do. 197 */ 198 if (mp->mnt_flag & MNT_UPDATE) { 199 printf("ntfs_mount(): MNT_UPDATE not supported\n"); 200 return (EINVAL); 201 } 202 203 /* 204 * Not an update, or updating the name: look up the name 205 * and verify that it refers to a sensible block device. 206 */ 207 err = namei_simple_user(args->fspec, 208 NSM_FOLLOW_NOEMULROOT, &devvp); 209 if (err) 210 return (err); 211 212 if (devvp->v_type != VBLK) { 213 err = ENOTBLK; 214 goto fail; 215 } 216 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 217 err = ENXIO; 218 goto fail; 219 } 220 if (mp->mnt_flag & MNT_UPDATE) { 221 #if 0 222 /* 223 ******************** 224 * UPDATE 225 ******************** 226 */ 227 228 if (devvp != ntmp->um_devvp) { 229 err = EINVAL; /* needs translation */ 230 goto fail; 231 } 232 233 /* 234 * Update device name only on success 235 */ 236 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec, 237 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p); 238 if (err) 239 goto fail; 240 241 vrele(devvp); 242 #endif 243 } else { 244 /* 245 ******************** 246 * NEW MOUNT 247 ******************** 248 */ 249 250 /* 251 * Since this is a new mount, we want the names for 252 * the device and the mount point copied in. If an 253 * error occurs, the mountpoint is discarded by the 254 * upper level code. 255 */ 256 257 /* Save "last mounted on" info for mount point (NULL pad)*/ 258 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 259 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 260 if (err) 261 goto fail; 262 263 if (mp->mnt_flag & MNT_RDONLY) 264 flags = FREAD; 265 else 266 flags = FREAD|FWRITE; 267 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 268 err = VOP_OPEN(devvp, flags, FSCRED); 269 VOP_UNLOCK(devvp); 270 if (err) 271 goto fail; 272 err = ntfs_mountfs(devvp, mp, args, l); 273 if (err) { 274 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 275 (void)VOP_CLOSE(devvp, flags, NOCRED); 276 VOP_UNLOCK(devvp); 277 goto fail; 278 } 279 } 280 281 /* 282 * Initialize FS stat information in mount struct; uses both 283 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 284 * 285 * This code is common to root and non-root mounts 286 */ 287 (void)VFS_STATVFS(mp, &mp->mnt_stat); 288 return (err); 289 290 fail: 291 vrele(devvp); 292 return (err); 293 } 294 295 static int 296 ntfs_superblock_validate(struct ntfsmount *ntmp) 297 { 298 /* Sanity checks. XXX: More checks are probably needed. */ 299 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 300 dprintf(("ntfs_superblock_validate: invalid boot block\n")); 301 return EINVAL; 302 } 303 if (ntmp->ntm_bps == 0) { 304 dprintf(("ntfs_superblock_validate: invalid bytes per sector\n")); 305 return EINVAL; 306 } 307 if (ntmp->ntm_spc == 0) { 308 dprintf(("ntfs_superblock_validate: invalid sectors per cluster\n")); 309 return EINVAL; 310 } 311 return 0; 312 } 313 314 /* 315 * Common code for mount and mountroot 316 */ 317 int 318 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l) 319 { 320 struct buf *bp; 321 struct ntfsmount *ntmp; 322 dev_t dev = devvp->v_rdev; 323 int error, i; 324 struct vnode *vp; 325 struct vnode_iterator *marker; 326 327 ntmp = NULL; 328 329 /* 330 * Flush out any old buffers remaining from a previous use. 331 */ 332 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 333 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 334 VOP_UNLOCK(devvp); 335 if (error) 336 return (error); 337 338 bp = NULL; 339 340 error = bread(devvp, BBLOCK, BBSIZE, 0, &bp); 341 if (error) 342 goto out; 343 ntmp = malloc(sizeof(*ntmp), M_NTFSMNT, M_WAITOK|M_ZERO); 344 memcpy(&ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile)); 345 brelse(bp, 0); 346 bp = NULL; 347 348 if ((error = ntfs_superblock_validate(ntmp))) 349 goto out; 350 351 { 352 int8_t cpr = ntmp->ntm_mftrecsz; 353 if (cpr > 0) 354 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 355 else 356 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 357 } 358 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 359 ntmp->ntm_bps, ntmp->ntm_spc, ntmp->ntm_bootfile.bf_media, 360 ntmp->ntm_mftrecsz, ntmp->ntm_bpmftrec)); 361 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 362 (u_int32_t)ntmp->ntm_mftcn, (u_int32_t)ntmp->ntm_mftmirrcn)); 363 364 ntmp->ntm_mountp = mp; 365 ntmp->ntm_dev = dev; 366 ntmp->ntm_devvp = devvp; 367 ntmp->ntm_uid = argsp->uid; 368 ntmp->ntm_gid = argsp->gid; 369 ntmp->ntm_mode = argsp->mode; 370 ntmp->ntm_flag = argsp->flag; 371 mp->mnt_data = ntmp; 372 373 /* set file name encode/decode hooks XXX utf-8 only for now */ 374 ntmp->ntm_wget = ntfs_utf8_wget; 375 ntmp->ntm_wput = ntfs_utf8_wput; 376 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 377 378 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 379 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 380 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 381 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 382 383 /* 384 * We read in some system nodes to do not allow 385 * reclaim them and to have everytime access to them. 386 */ 387 { 388 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 389 for (i = 0; i < 3; i++) { 390 error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE, 391 &(ntmp->ntm_sysvn[pi[i]])); 392 if (error) 393 goto out1; 394 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM; 395 vref(ntmp->ntm_sysvn[pi[i]]); 396 vput(ntmp->ntm_sysvn[pi[i]]); 397 } 398 } 399 400 /* read the Unicode lowercase --> uppercase translation table, 401 * if necessary */ 402 if ((error = ntfs_toupper_use(mp, ntmp))) 403 goto out1; 404 405 /* 406 * Scan $BitMap and count free clusters 407 */ 408 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree); 409 if (error) 410 goto out1; 411 412 /* 413 * Read and translate to internal format attribute 414 * definition file. 415 */ 416 { 417 int num,j; 418 struct attrdef ad; 419 420 /* Open $AttrDef */ 421 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp); 422 if (error) 423 goto out1; 424 425 /* Count valid entries */ 426 for (num = 0; ; num++) { 427 error = ntfs_readattr(ntmp, VTONT(vp), 428 NTFS_A_DATA, NULL, 429 num * sizeof(ad), sizeof(ad), 430 &ad, NULL); 431 if (error) 432 goto out1; 433 if (ad.ad_name[0] == 0) 434 break; 435 } 436 437 /* Alloc memory for attribute definitions */ 438 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 439 num * sizeof(struct ntvattrdef), 440 M_NTFSMNT, M_WAITOK); 441 442 ntmp->ntm_adnum = num; 443 444 /* Read them and translate */ 445 for (i = 0; i < num; i++) { 446 error = ntfs_readattr(ntmp, VTONT(vp), 447 NTFS_A_DATA, NULL, 448 i * sizeof(ad), sizeof(ad), 449 &ad, NULL); 450 if (error) 451 goto out1; 452 j = 0; 453 do { 454 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j]; 455 } while(ad.ad_name[j++]); 456 ntmp->ntm_ad[i].ad_namelen = j - 1; 457 ntmp->ntm_ad[i].ad_type = ad.ad_type; 458 } 459 460 vput(vp); 461 } 462 463 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev; 464 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 465 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 466 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 467 mp->mnt_flag |= MNT_LOCAL; 468 spec_node_setmountedfs(devvp, mp); 469 return (0); 470 471 out1: 472 for (i = 0; i < NTFS_SYSNODESNUM; i++) 473 if (ntmp->ntm_sysvn[i]) 474 vrele(ntmp->ntm_sysvn[i]); 475 476 vfs_vnode_iterator_init(mp, &marker); 477 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { 478 if (vrecycle(vp)) 479 continue; 480 panic("%s: cannot recycle vnode %p", __func__, vp); 481 } 482 vfs_vnode_iterator_destroy(marker); 483 out: 484 spec_node_setmountedfs(devvp, NULL); 485 if (bp) 486 brelse(bp, 0); 487 488 if (error) { 489 if (ntmp) { 490 if (ntmp->ntm_ad) 491 free(ntmp->ntm_ad, M_NTFSMNT); 492 free(ntmp, M_NTFSMNT); 493 } 494 } 495 496 return (error); 497 } 498 499 static int 500 ntfs_start(struct mount *mp, int flags) 501 { 502 return (0); 503 } 504 505 static int 506 ntfs_unmount(struct mount *mp, int mntflags) 507 { 508 struct lwp *l = curlwp; 509 struct ntfsmount *ntmp; 510 int error, ronly = 0, flags, i; 511 512 dprintf(("ntfs_unmount: unmounting...\n")); 513 ntmp = VFSTONTFS(mp); 514 515 flags = 0; 516 if (mntflags & MNT_FORCE) 517 flags |= FORCECLOSE; 518 519 dprintf(("ntfs_unmount: vflushing...\n")); 520 error = vflush(mp, NULLVP, flags | SKIPSYSTEM); 521 if (error) { 522 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 523 return (error); 524 } 525 526 /* Check if only system vnodes are rest */ 527 for (i = 0; i < NTFS_SYSNODESNUM; i++) 528 if ((ntmp->ntm_sysvn[i]) && 529 (vrefcnt(ntmp->ntm_sysvn[i]) > 1)) 530 return (EBUSY); 531 532 /* Dereference all system vnodes */ 533 for (i = 0; i < NTFS_SYSNODESNUM; i++) 534 if (ntmp->ntm_sysvn[i]) 535 vrele(ntmp->ntm_sysvn[i]); 536 537 /* vflush system vnodes */ 538 error = vflush(mp, NULLVP, flags); 539 if (error) { 540 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 541 } 542 543 /* Check if the type of device node isn't VBAD before 544 * touching v_specinfo. If the device vnode is revoked, the 545 * field is NULL and touching it causes null pointer derefercence. 546 */ 547 if (ntmp->ntm_devvp->v_type != VBAD) 548 spec_node_setmountedfs(ntmp->ntm_devvp, NULL); 549 550 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 551 KASSERT(error == 0); 552 553 /* lock the device vnode before calling VOP_CLOSE() */ 554 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 555 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 556 NOCRED); 557 KASSERT(error == 0); 558 VOP_UNLOCK(ntmp->ntm_devvp); 559 560 vrele(ntmp->ntm_devvp); 561 562 /* free the toupper table, if this has been last mounted ntfs volume */ 563 ntfs_toupper_unuse(); 564 565 dprintf(("ntfs_umount: freeing memory...\n")); 566 mp->mnt_data = NULL; 567 mp->mnt_flag &= ~MNT_LOCAL; 568 free(ntmp->ntm_ad, M_NTFSMNT); 569 free(ntmp, M_NTFSMNT); 570 return (0); 571 } 572 573 static int 574 ntfs_root(struct mount *mp, int lktype, struct vnode **vpp) 575 { 576 struct vnode *nvp; 577 int error = 0; 578 579 dprintf(("ntfs_root(): sysvn: %p\n", 580 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 581 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, lktype, &nvp); 582 if (error) { 583 printf("ntfs_root: VFS_VGET failed: %d\n", error); 584 return (error); 585 } 586 587 *vpp = nvp; 588 return (0); 589 } 590 591 int 592 ntfs_calccfree(struct ntfsmount *ntmp, cn_t *cfreep) 593 { 594 struct vnode *vp; 595 u_int8_t *tmp; 596 int j, error; 597 cn_t cfree = 0; 598 size_t bmsize, i; 599 600 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 601 bmsize = VTOF(vp)->f_size; 602 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 603 604 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 605 0, bmsize, tmp, NULL); 606 if (error) 607 goto out; 608 609 for (i = 0; i < bmsize; i++) 610 for (j = 0; j < 8; j++) 611 if (~tmp[i] & (1 << j)) 612 cfree++; 613 *cfreep = cfree; 614 615 out: 616 free(tmp, M_TEMP); 617 return(error); 618 } 619 620 static int 621 ntfs_statvfs(struct mount *mp, struct statvfs *sbp) 622 { 623 struct ntfsmount *ntmp = VFSTONTFS(mp); 624 u_int64_t mftallocated; 625 626 dprintf(("ntfs_statvfs():\n")); 627 628 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 629 630 sbp->f_bsize = ntmp->ntm_bps; 631 sbp->f_frsize = sbp->f_bsize; /* XXX */ 632 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 633 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 634 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 635 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 636 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 637 sbp->f_ffree; 638 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 639 sbp->f_flag = mp->mnt_flag; 640 copy_statvfs_info(sbp, mp); 641 return (0); 642 } 643 644 static int 645 ntfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 646 { 647 /*dprintf(("ntfs_sync():\n"));*/ 648 return (0); 649 } 650 651 /*ARGSUSED*/ 652 static int 653 ntfs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp) 654 { 655 struct ntfid ntfh; 656 int error; 657 658 if (fhp->fid_len != sizeof(struct ntfid)) 659 return EINVAL; 660 memcpy(&ntfh, fhp, sizeof(ntfh)); 661 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 662 (unsigned long long)ntfh.ntfid_ino)); 663 664 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, "", 665 lktype, vpp); 666 if (error != 0) { 667 *vpp = NULLVP; 668 return (error); 669 } 670 671 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 672 * with NTFS, we don't need to check anything else for now */ 673 return (0); 674 } 675 676 static int 677 ntfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 678 { 679 struct ntnode *ntp; 680 struct ntfid ntfh; 681 struct fnode *fn; 682 683 if (*fh_size < sizeof(struct ntfid)) { 684 *fh_size = sizeof(struct ntfid); 685 return E2BIG; 686 } 687 *fh_size = sizeof(struct ntfid); 688 689 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 690 vp)); 691 692 fn = VTOF(vp); 693 ntp = VTONT(vp); 694 memset(&ntfh, 0, sizeof(ntfh)); 695 ntfh.ntfid_len = sizeof(struct ntfid); 696 ntfh.ntfid_ino = ntp->i_number; 697 ntfh.ntfid_attr = fn->f_attrtype; 698 #ifdef notyet 699 ntfh.ntfid_gen = ntp->i_gen; 700 #endif 701 memcpy(fhp, &ntfh, sizeof(ntfh)); 702 return (0); 703 } 704 705 static int 706 ntfs_loadvnode(struct mount *mp, struct vnode *vp, 707 const void *key, size_t key_len, const void **new_key) 708 { 709 int error; 710 struct ntvattr *vap; 711 struct ntkey small_key, *ntkey; 712 struct ntfsmount *ntmp; 713 struct ntnode *ip; 714 struct fnode *fp = NULL; 715 enum vtype f_type = VBAD; 716 717 if (key_len <= sizeof(small_key)) 718 ntkey = &small_key; 719 else 720 ntkey = kmem_alloc(key_len, KM_SLEEP); 721 memcpy(ntkey, key, key_len); 722 723 dprintf(("ntfs_loadvnode: ino: %llu, attr: 0x%x:%s", 724 (unsigned long long)ntkey->k_ino, 725 ntkey->k_attrtype, ntkey->k_attrname)); 726 727 ntmp = VFSTONTFS(mp); 728 729 /* Get ntnode */ 730 error = ntfs_ntlookup(ntmp, ntkey->k_ino, &ip); 731 if (error) { 732 printf("ntfs_loadvnode: ntfs_ntget failed\n"); 733 goto out; 734 } 735 /* It may be not initialized fully, so force load it */ 736 if (!(ip->i_flag & IN_LOADED)) { 737 error = ntfs_loadntnode(ntmp, ip); 738 if (error) { 739 printf("ntfs_loadvnode: CAN'T LOAD ATTRIBUTES FOR INO:" 740 " %llu\n", (unsigned long long)ip->i_number); 741 ntfs_ntput(ip); 742 goto out; 743 } 744 } 745 746 /* Setup fnode */ 747 fp = kmem_zalloc(sizeof(*fp), KM_SLEEP); 748 dprintf(("%s: allocating fnode: %p\n", __func__, fp)); 749 750 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap); 751 if (error) { 752 printf("%s: attr %x for ino %" PRId64 ": error %d\n", 753 __func__, NTFS_A_NAME, ip->i_number, error); 754 ntfs_ntput(ip); 755 goto out; 756 } 757 fp->f_fflag = vap->va_a_name->n_flag; 758 fp->f_pnumber = vap->va_a_name->n_pnumber; 759 fp->f_times = vap->va_a_name->n_times; 760 ntfs_ntvattrrele(vap); 761 762 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 763 (ntkey->k_attrtype == NTFS_A_DATA && 764 strcmp(ntkey->k_attrname, "") == 0)) { 765 f_type = VDIR; 766 } else { 767 f_type = VREG; 768 error = ntfs_ntvattrget(ntmp, ip, 769 ntkey->k_attrtype, ntkey->k_attrname, 0, &vap); 770 if (error == 0) { 771 fp->f_size = vap->va_datalen; 772 fp->f_allocated = vap->va_allocated; 773 ntfs_ntvattrrele(vap); 774 } else if (ntkey->k_attrtype == NTFS_A_DATA && 775 strcmp(ntkey->k_attrname, "") == 0 && 776 error == ENOENT) { 777 fp->f_size = 0; 778 fp->f_allocated = 0; 779 error = 0; 780 } else { 781 printf("%s: attr %x for ino %" PRId64 ": error %d\n", 782 __func__, ntkey->k_attrtype, ip->i_number, error); 783 ntfs_ntput(ip); 784 goto out; 785 } 786 } 787 788 if (key_len <= sizeof(fp->f_smallkey)) 789 fp->f_key = &fp->f_smallkey; 790 else 791 fp->f_key = kmem_alloc(key_len, KM_SLEEP); 792 fp->f_ip = ip; 793 fp->f_ino = ip->i_number; 794 strcpy(fp->f_attrname, ntkey->k_attrname); 795 fp->f_attrtype = ntkey->k_attrtype; 796 fp->f_vp = vp; 797 vp->v_data = fp; 798 799 vp->v_tag = VT_NTFS; 800 vp->v_type = f_type; 801 vp->v_op = ntfs_vnodeop_p; 802 ntfs_ntref(ip); 803 vref(ip->i_devvp); 804 genfs_node_init(vp, &ntfs_genfsops); 805 806 if (ip->i_number == NTFS_ROOTINO) 807 vp->v_vflag |= VV_ROOT; 808 809 uvm_vnp_setsize(vp, fp->f_size); 810 ntfs_ntput(ip); 811 812 *new_key = fp->f_key; 813 814 fp = NULL; 815 816 out: 817 if (ntkey != &small_key) 818 kmem_free(ntkey, key_len); 819 if (fp) 820 kmem_free(fp, sizeof(*fp)); 821 822 return error; 823 } 824 825 static int 826 ntfs_vget(struct mount *mp, ino_t ino, int lktype, struct vnode **vpp) 827 { 828 return ntfs_vgetex(mp, ino, NTFS_A_DATA, "", lktype, vpp); 829 } 830 831 int 832 ntfs_vgetex(struct mount *mp, ino_t ino, u_int32_t attrtype, 833 const char *attrname, u_long lkflags, struct vnode **vpp) 834 { 835 const int attrlen = strlen(attrname); 836 int error; 837 struct ntkey small_key, *ntkey; 838 839 if (NTKEY_SIZE(attrlen) <= sizeof(small_key)) 840 ntkey = &small_key; 841 else 842 ntkey = malloc(NTKEY_SIZE(attrlen), M_TEMP, M_WAITOK); 843 ntkey->k_ino = ino; 844 ntkey->k_attrtype = attrtype; 845 strcpy(ntkey->k_attrname, attrname); 846 847 error = vcache_get(mp, ntkey, NTKEY_SIZE(attrlen), vpp); 848 if (error) 849 goto out; 850 851 if ((lkflags & (LK_SHARED | LK_EXCLUSIVE)) != 0) { 852 error = vn_lock(*vpp, lkflags); 853 if (error) { 854 vrele(*vpp); 855 *vpp = NULL; 856 } 857 } 858 859 out: 860 if (ntkey != &small_key) 861 free(ntkey, M_TEMP); 862 return error; 863 } 864 865 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 866 867 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 868 &ntfs_vnodeop_opv_desc, 869 NULL, 870 }; 871 872 struct vfsops ntfs_vfsops = { 873 .vfs_name = MOUNT_NTFS, 874 .vfs_min_mount_data = sizeof (struct ntfs_args), 875 .vfs_mount = ntfs_mount, 876 .vfs_start = ntfs_start, 877 .vfs_unmount = ntfs_unmount, 878 .vfs_root = ntfs_root, 879 .vfs_quotactl = (void *)eopnotsupp, 880 .vfs_statvfs = ntfs_statvfs, 881 .vfs_sync = ntfs_sync, 882 .vfs_vget = ntfs_vget, 883 .vfs_loadvnode = ntfs_loadvnode, 884 .vfs_fhtovp = ntfs_fhtovp, 885 .vfs_vptofh = ntfs_vptofh, 886 .vfs_init = ntfs_init, 887 .vfs_reinit = ntfs_reinit, 888 .vfs_done = ntfs_done, 889 .vfs_mountroot = ntfs_mountroot, 890 .vfs_snapshot = (void *)eopnotsupp, 891 .vfs_extattrctl = vfs_stdextattrctl, 892 .vfs_suspendctl = genfs_suspendctl, 893 .vfs_renamelock_enter = genfs_renamelock_enter, 894 .vfs_renamelock_exit = genfs_renamelock_exit, 895 .vfs_fsync = (void *)eopnotsupp, 896 .vfs_opv_descs = ntfs_vnodeopv_descs 897 }; 898 899 static int 900 ntfs_modcmd(modcmd_t cmd, void *arg) 901 { 902 int error; 903 904 switch (cmd) { 905 case MODULE_CMD_INIT: 906 error = vfs_attach(&ntfs_vfsops); 907 if (error != 0) 908 break; 909 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 910 CTLFLAG_PERMANENT, 911 CTLTYPE_NODE, "ntfs", 912 SYSCTL_DESCR("NTFS file system"), 913 NULL, 0, NULL, 0, 914 CTL_VFS, 20, CTL_EOL); 915 /* 916 * XXX the "20" above could be dynamic, thereby eliminating 917 * one more instance of the "number to vfs" mapping problem, 918 * but "20" is the order as taken from sys/mount.h 919 */ 920 break; 921 case MODULE_CMD_FINI: 922 error = vfs_detach(&ntfs_vfsops); 923 if (error != 0) 924 break; 925 sysctl_teardown(&ntfs_sysctl_log); 926 break; 927 default: 928 error = ENOTTY; 929 break; 930 } 931 932 return (error); 933 }
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