1 /* $NetBSD: ntfs_vfsops.c,v 1.97 2014/11/13 16:51:53 hannken 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 1.97 2014/11/13 16:51:53 hannken 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_mount(struct mount *, const char *, void *, size_t *); 69 static int ntfs_root(struct mount *, struct vnode **); 70 static int ntfs_start(struct mount *, int); 71 static int ntfs_statvfs(struct mount *, struct statvfs *); 72 static int ntfs_sync(struct mount *, int, kauth_cred_t); 73 static int ntfs_unmount(struct mount *, int); 74 static int ntfs_vget(struct mount *mp, ino_t ino, 75 struct vnode **vpp); 76 static int ntfs_loadvnode(struct mount *, struct vnode *, 77 const void *, size_t, const void **); 78 static int ntfs_mountfs(struct vnode *, struct mount *, 79 struct ntfs_args *, struct lwp *); 80 static int ntfs_vptofh(struct vnode *, struct fid *, size_t *); 81 82 static void ntfs_init(void); 83 static void ntfs_reinit(void); 84 static void ntfs_done(void); 85 static int ntfs_fhtovp(struct mount *, struct fid *, 86 struct vnode **); 87 static int ntfs_mountroot(void); 88 89 static const struct genfs_ops ntfs_genfsops = { 90 .gop_write = genfs_compat_gop_write, 91 }; 92 93 static struct sysctllog *ntfs_sysctl_log; 94 95 static int 96 ntfs_mountroot(void) 97 { 98 struct mount *mp; 99 struct lwp *l = curlwp; /* XXX */ 100 int error; 101 struct ntfs_args args; 102 103 if (device_class(root_device) != DV_DISK) 104 return (ENODEV); 105 106 if ((error = vfs_rootmountalloc(MOUNT_NTFS, "root_device", &mp))) { 107 vrele(rootvp); 108 return (error); 109 } 110 111 args.flag = 0; 112 args.uid = 0; 113 args.gid = 0; 114 args.mode = 0777; 115 116 if ((error = ntfs_mountfs(rootvp, mp, &args, l)) != 0) { 117 vfs_unbusy(mp, false, NULL); 118 vfs_destroy(mp); 119 return (error); 120 } 121 122 mountlist_append(mp); 123 (void)ntfs_statvfs(mp, &mp->mnt_stat); 124 vfs_unbusy(mp, false, NULL); 125 return (0); 126 } 127 128 static void 129 ntfs_init(void) 130 { 131 132 malloc_type_attach(M_NTFSMNT); 133 malloc_type_attach(M_NTFSNTNODE); 134 malloc_type_attach(M_NTFSDIR); 135 malloc_type_attach(M_NTFSNTVATTR); 136 malloc_type_attach(M_NTFSRDATA); 137 malloc_type_attach(M_NTFSDECOMP); 138 malloc_type_attach(M_NTFSRUN); 139 ntfs_nthashinit(); 140 ntfs_toupper_init(); 141 } 142 143 static void 144 ntfs_reinit(void) 145 { 146 ntfs_nthashreinit(); 147 } 148 149 static void 150 ntfs_done(void) 151 { 152 ntfs_nthashdone(); 153 malloc_type_detach(M_NTFSMNT); 154 malloc_type_detach(M_NTFSNTNODE); 155 malloc_type_detach(M_NTFSDIR); 156 malloc_type_detach(M_NTFSNTVATTR); 157 malloc_type_detach(M_NTFSRDATA); 158 malloc_type_detach(M_NTFSDECOMP); 159 malloc_type_detach(M_NTFSRUN); 160 } 161 162 static int 163 ntfs_mount ( 164 struct mount *mp, 165 const char *path, 166 void *data, 167 size_t *data_len) 168 { 169 struct lwp *l = curlwp; 170 int err = 0, flags; 171 struct vnode *devvp; 172 struct ntfs_args *args = data; 173 174 if (args == NULL) 175 return EINVAL; 176 if (*data_len < sizeof *args) 177 return EINVAL; 178 179 if (mp->mnt_flag & MNT_GETARGS) { 180 struct ntfsmount *ntmp = VFSTONTFS(mp); 181 if (ntmp == NULL) 182 return EIO; 183 args->fspec = NULL; 184 args->uid = ntmp->ntm_uid; 185 args->gid = ntmp->ntm_gid; 186 args->mode = ntmp->ntm_mode; 187 args->flag = ntmp->ntm_flag; 188 *data_len = sizeof *args; 189 return 0; 190 } 191 /* 192 *** 193 * Mounting non-root file system or updating a file system 194 *** 195 */ 196 197 /* 198 * If updating, check whether changing from read-only to 199 * read/write; if there is no device name, that's all we do. 200 */ 201 if (mp->mnt_flag & MNT_UPDATE) { 202 printf("ntfs_mount(): MNT_UPDATE not supported\n"); 203 return (EINVAL); 204 } 205 206 /* 207 * Not an update, or updating the name: look up the name 208 * and verify that it refers to a sensible block device. 209 */ 210 err = namei_simple_user(args->fspec, 211 NSM_FOLLOW_NOEMULROOT, &devvp); 212 if (err) { 213 /* can't get devvp!*/ 214 return (err); 215 } 216 217 if (devvp->v_type != VBLK) { 218 err = ENOTBLK; 219 goto fail; 220 } 221 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 222 err = ENXIO; 223 goto fail; 224 } 225 if (mp->mnt_flag & MNT_UPDATE) { 226 #if 0 227 /* 228 ******************** 229 * UPDATE 230 ******************** 231 */ 232 233 if (devvp != ntmp->um_devvp) { 234 err = EINVAL; /* needs translation */ 235 goto fail; 236 } 237 238 /* 239 * Update device name only on success 240 */ 241 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec, 242 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p); 243 if (err) 244 goto fail; 245 246 vrele(devvp); 247 #endif 248 } else { 249 /* 250 ******************** 251 * NEW MOUNT 252 ******************** 253 */ 254 255 /* 256 * Since this is a new mount, we want the names for 257 * the device and the mount point copied in. If an 258 * error occurs, the mountpoint is discarded by the 259 * upper level code. 260 */ 261 262 /* Save "last mounted on" info for mount point (NULL pad)*/ 263 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 264 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 265 if (err) 266 goto fail; 267 268 if (mp->mnt_flag & MNT_RDONLY) 269 flags = FREAD; 270 else 271 flags = FREAD|FWRITE; 272 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 273 err = VOP_OPEN(devvp, flags, FSCRED); 274 VOP_UNLOCK(devvp); 275 if (err) 276 goto fail; 277 err = ntfs_mountfs(devvp, mp, args, l); 278 if (err) { 279 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 280 (void)VOP_CLOSE(devvp, flags, NOCRED); 281 VOP_UNLOCK(devvp); 282 goto fail; 283 } 284 } 285 286 /* 287 * Initialize FS stat information in mount struct; uses both 288 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 289 * 290 * This code is common to root and non-root mounts 291 */ 292 (void)VFS_STATVFS(mp, &mp->mnt_stat); 293 return (err); 294 295 fail: 296 vrele(devvp); 297 return (err); 298 } 299 300 /* 301 * Common code for mount and mountroot 302 */ 303 int 304 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l) 305 { 306 struct buf *bp; 307 struct ntfsmount *ntmp; 308 dev_t dev = devvp->v_rdev; 309 int error, i; 310 struct vnode *vp; 311 312 ntmp = NULL; 313 314 /* 315 * Flush out any old buffers remaining from a previous use. 316 */ 317 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 318 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 319 VOP_UNLOCK(devvp); 320 if (error) 321 return (error); 322 323 bp = NULL; 324 325 error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp); 326 if (error) 327 goto out; 328 ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK|M_ZERO); 329 memcpy( &ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile) ); 330 brelse( bp , 0 ); 331 bp = NULL; 332 333 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 334 error = EINVAL; 335 dprintf(("ntfs_mountfs: invalid boot block\n")); 336 goto out; 337 } 338 339 { 340 int8_t cpr = ntmp->ntm_mftrecsz; 341 if( cpr > 0 ) 342 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 343 else 344 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 345 } 346 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 347 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media, 348 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec)); 349 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 350 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn)); 351 352 ntmp->ntm_mountp = mp; 353 ntmp->ntm_dev = dev; 354 ntmp->ntm_devvp = devvp; 355 ntmp->ntm_uid = argsp->uid; 356 ntmp->ntm_gid = argsp->gid; 357 ntmp->ntm_mode = argsp->mode; 358 ntmp->ntm_flag = argsp->flag; 359 mp->mnt_data = ntmp; 360 361 /* set file name encode/decode hooks XXX utf-8 only for now */ 362 ntmp->ntm_wget = ntfs_utf8_wget; 363 ntmp->ntm_wput = ntfs_utf8_wput; 364 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 365 366 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 367 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 368 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 369 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 370 371 /* 372 * We read in some system nodes to do not allow 373 * reclaim them and to have everytime access to them. 374 */ 375 { 376 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 377 for (i=0; i<3; i++) { 378 error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]])); 379 if(error) 380 goto out1; 381 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM; 382 vref(ntmp->ntm_sysvn[pi[i]]); 383 vput(ntmp->ntm_sysvn[pi[i]]); 384 } 385 } 386 387 /* read the Unicode lowercase --> uppercase translation table, 388 * if necessary */ 389 if ((error = ntfs_toupper_use(mp, ntmp))) 390 goto out1; 391 392 /* 393 * Scan $BitMap and count free clusters 394 */ 395 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree); 396 if(error) 397 goto out1; 398 399 /* 400 * Read and translate to internal format attribute 401 * definition file. 402 */ 403 { 404 int num,j; 405 struct attrdef ad; 406 407 /* Open $AttrDef */ 408 error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp ); 409 if(error) 410 goto out1; 411 412 /* Count valid entries */ 413 for(num=0;;num++) { 414 error = ntfs_readattr(ntmp, VTONT(vp), 415 NTFS_A_DATA, NULL, 416 num * sizeof(ad), sizeof(ad), 417 &ad, NULL); 418 if (error) 419 goto out1; 420 if (ad.ad_name[0] == 0) 421 break; 422 } 423 424 /* Alloc memory for attribute definitions */ 425 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 426 num * sizeof(struct ntvattrdef), 427 M_NTFSMNT, M_WAITOK); 428 429 ntmp->ntm_adnum = num; 430 431 /* Read them and translate */ 432 for(i=0;i<num;i++){ 433 error = ntfs_readattr(ntmp, VTONT(vp), 434 NTFS_A_DATA, NULL, 435 i * sizeof(ad), sizeof(ad), 436 &ad, NULL); 437 if (error) 438 goto out1; 439 j = 0; 440 do { 441 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j]; 442 } while(ad.ad_name[j++]); 443 ntmp->ntm_ad[i].ad_namelen = j - 1; 444 ntmp->ntm_ad[i].ad_type = ad.ad_type; 445 } 446 447 vput(vp); 448 } 449 450 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev; 451 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 452 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 453 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 454 mp->mnt_flag |= MNT_LOCAL; 455 spec_node_setmountedfs(devvp, mp); 456 return (0); 457 458 out1: 459 for(i=0;i<NTFS_SYSNODESNUM;i++) 460 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 461 462 if (vflush(mp,NULLVP,0)) { 463 dprintf(("ntfs_mountfs: vflush failed\n")); 464 } 465 out: 466 spec_node_setmountedfs(devvp, NULL); 467 if (bp) 468 brelse(bp, 0); 469 470 if (error) { 471 if (ntmp) { 472 if (ntmp->ntm_ad) 473 free(ntmp->ntm_ad, M_NTFSMNT); 474 free(ntmp, M_NTFSMNT); 475 } 476 } 477 478 return (error); 479 } 480 481 static int 482 ntfs_start ( 483 struct mount *mp, 484 int flags) 485 { 486 return (0); 487 } 488 489 static int 490 ntfs_unmount( 491 struct mount *mp, 492 int mntflags) 493 { 494 struct lwp *l = curlwp; 495 struct ntfsmount *ntmp; 496 int error, ronly = 0, flags, i; 497 498 dprintf(("ntfs_unmount: unmounting...\n")); 499 ntmp = VFSTONTFS(mp); 500 501 flags = 0; 502 if(mntflags & MNT_FORCE) 503 flags |= FORCECLOSE; 504 505 dprintf(("ntfs_unmount: vflushing...\n")); 506 error = vflush(mp,NULLVP,flags | SKIPSYSTEM); 507 if (error) { 508 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 509 return (error); 510 } 511 512 /* Check if only system vnodes are rest */ 513 for(i=0;i<NTFS_SYSNODESNUM;i++) 514 if((ntmp->ntm_sysvn[i]) && 515 (ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY); 516 517 /* Dereference all system vnodes */ 518 for(i=0;i<NTFS_SYSNODESNUM;i++) 519 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 520 521 /* vflush system vnodes */ 522 error = vflush(mp,NULLVP,flags); 523 if (error) { 524 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 525 } 526 527 /* Check if the type of device node isn't VBAD before 528 * touching v_specinfo. If the device vnode is revoked, the 529 * field is NULL and touching it causes null pointer derefercence. 530 */ 531 if (ntmp->ntm_devvp->v_type != VBAD) 532 spec_node_setmountedfs(ntmp->ntm_devvp, NULL); 533 534 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 535 KASSERT(error == 0); 536 537 /* lock the device vnode before calling VOP_CLOSE() */ 538 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 539 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 540 NOCRED); 541 KASSERT(error == 0); 542 VOP_UNLOCK(ntmp->ntm_devvp); 543 544 vrele(ntmp->ntm_devvp); 545 546 /* free the toupper table, if this has been last mounted ntfs volume */ 547 ntfs_toupper_unuse(); 548 549 dprintf(("ntfs_umount: freeing memory...\n")); 550 mp->mnt_data = NULL; 551 mp->mnt_flag &= ~MNT_LOCAL; 552 free(ntmp->ntm_ad, M_NTFSMNT); 553 free(ntmp, M_NTFSMNT); 554 return (0); 555 } 556 557 static int 558 ntfs_root( 559 struct mount *mp, 560 struct vnode **vpp) 561 { 562 struct vnode *nvp; 563 int error = 0; 564 565 dprintf(("ntfs_root(): sysvn: %p\n", 566 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 567 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 568 if(error) { 569 printf("ntfs_root: VFS_VGET failed: %d\n",error); 570 return (error); 571 } 572 573 *vpp = nvp; 574 return (0); 575 } 576 577 int 578 ntfs_calccfree( 579 struct ntfsmount *ntmp, 580 cn_t *cfreep) 581 { 582 struct vnode *vp; 583 u_int8_t *tmp; 584 int j, error; 585 cn_t cfree = 0; 586 size_t bmsize, i; 587 588 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 589 590 bmsize = VTOF(vp)->f_size; 591 592 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 593 594 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 595 0, bmsize, tmp, NULL); 596 if (error) 597 goto out; 598 599 for(i=0;i<bmsize;i++) 600 for(j=0;j<8;j++) 601 if(~tmp[i] & (1 << j)) cfree++; 602 *cfreep = cfree; 603 604 out: 605 free(tmp, M_TEMP); 606 return(error); 607 } 608 609 static int 610 ntfs_statvfs( 611 struct mount *mp, 612 struct statvfs *sbp) 613 { 614 struct ntfsmount *ntmp = VFSTONTFS(mp); 615 u_int64_t mftallocated; 616 617 dprintf(("ntfs_statvfs():\n")); 618 619 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 620 621 sbp->f_bsize = ntmp->ntm_bps; 622 sbp->f_frsize = sbp->f_bsize; /* XXX */ 623 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 624 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 625 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 626 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 627 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 628 sbp->f_ffree; 629 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 630 sbp->f_flag = mp->mnt_flag; 631 copy_statvfs_info(sbp, mp); 632 return (0); 633 } 634 635 static int 636 ntfs_sync ( 637 struct mount *mp, 638 int waitfor, 639 kauth_cred_t cred) 640 { 641 /*dprintf(("ntfs_sync():\n"));*/ 642 return (0); 643 } 644 645 /*ARGSUSED*/ 646 static int 647 ntfs_fhtovp( 648 struct mount *mp, 649 struct fid *fhp, 650 struct vnode **vpp) 651 { 652 struct ntfid ntfh; 653 int error; 654 655 if (fhp->fid_len != sizeof(struct ntfid)) 656 return EINVAL; 657 memcpy(&ntfh, fhp, sizeof(ntfh)); 658 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 659 (unsigned long long)ntfh.ntfid_ino)); 660 661 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, "", 662 LK_EXCLUSIVE, vpp); 663 if (error != 0) { 664 *vpp = NULLVP; 665 return (error); 666 } 667 668 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 669 * with NTFS, we don't need to check anything else for now */ 670 return (0); 671 } 672 673 static int 674 ntfs_vptofh( 675 struct vnode *vp, 676 struct fid *fhp, 677 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 ntfs_ntput(ip); 753 goto out; 754 } 755 fp->f_fflag = vap->va_a_name->n_flag; 756 fp->f_pnumber = vap->va_a_name->n_pnumber; 757 fp->f_times = vap->va_a_name->n_times; 758 ntfs_ntvattrrele(vap); 759 760 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 761 (ntkey->k_attrtype == NTFS_A_DATA && 762 strcmp(ntkey->k_attrname, "") == 0)) { 763 f_type = VDIR; 764 } else { 765 f_type = VREG; 766 error = ntfs_ntvattrget(ntmp, ip, 767 ntkey->k_attrtype, ntkey->k_attrname, 0, &vap); 768 if (error == 0) { 769 fp->f_size = vap->va_datalen; 770 fp->f_allocated = vap->va_allocated; 771 ntfs_ntvattrrele(vap); 772 } else if (ntkey->k_attrtype == NTFS_A_DATA && 773 strcmp(ntkey->k_attrname, "") == 0 && 774 error == ENOENT) { 775 fp->f_size = 0; 776 fp->f_allocated = 0; 777 error = 0; 778 } else 779 goto out; 780 } 781 782 if (key_len <= sizeof(fp->f_smallkey)) 783 fp->f_key = &fp->f_smallkey; 784 else 785 fp->f_key = kmem_alloc(key_len, KM_SLEEP); 786 fp->f_ip = ip; 787 fp->f_ino = ip->i_number; 788 strcpy(fp->f_attrname, ntkey->k_attrname); 789 fp->f_attrtype = ntkey->k_attrtype; 790 fp->f_vp = vp; 791 vp->v_data = fp; 792 793 vp->v_tag = VT_NTFS; 794 vp->v_type = f_type; 795 vp->v_op = ntfs_vnodeop_p; 796 ntfs_ntref(ip); 797 vref(ip->i_devvp); 798 genfs_node_init(vp, &ntfs_genfsops); 799 800 if (ip->i_number == NTFS_ROOTINO) 801 vp->v_vflag |= VV_ROOT; 802 803 uvm_vnp_setsize(vp, fp->f_size); 804 ntfs_ntput(ip); 805 806 *new_key = fp->f_key; 807 808 fp = NULL; 809 810 out: 811 if (ntkey != &small_key) 812 kmem_free(ntkey, key_len); 813 if (fp) 814 kmem_free(fp, sizeof(*fp)); 815 816 return error; 817 } 818 819 static int 820 ntfs_vget( 821 struct mount *mp, 822 ino_t ino, 823 struct vnode **vpp) 824 { 825 return ntfs_vgetex(mp, ino, NTFS_A_DATA, "", LK_EXCLUSIVE, vpp); 826 } 827 828 int 829 ntfs_vgetex( 830 struct mount *mp, 831 ino_t ino, 832 u_int32_t attrtype, 833 const char *attrname, 834 u_long lkflags, 835 struct vnode **vpp) 836 { 837 const int attrlen = strlen(attrname); 838 int error; 839 struct ntkey small_key, *ntkey; 840 841 if (NTKEY_SIZE(attrlen) <= sizeof(small_key)) 842 ntkey = &small_key; 843 else 844 ntkey = malloc(NTKEY_SIZE(attrlen), M_TEMP, M_WAITOK); 845 ntkey->k_ino = ino; 846 ntkey->k_attrtype = attrtype; 847 strcpy(ntkey->k_attrname, attrname); 848 849 error = vcache_get(mp, ntkey, NTKEY_SIZE(attrlen), vpp); 850 if (error) 851 goto out; 852 853 if ((lkflags & (LK_SHARED | LK_EXCLUSIVE)) != 0) { 854 error = vn_lock(*vpp, lkflags); 855 if (error) { 856 vrele(*vpp); 857 *vpp = NULL; 858 } 859 } 860 861 out: 862 if (ntkey != &small_key) 863 free(ntkey, M_TEMP); 864 return error; 865 } 866 867 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 868 869 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 870 &ntfs_vnodeop_opv_desc, 871 NULL, 872 }; 873 874 struct vfsops ntfs_vfsops = { 875 .vfs_name = MOUNT_NTFS, 876 .vfs_min_mount_data = sizeof (struct ntfs_args), 877 .vfs_mount = ntfs_mount, 878 .vfs_start = ntfs_start, 879 .vfs_unmount = ntfs_unmount, 880 .vfs_root = ntfs_root, 881 .vfs_quotactl = (void *)eopnotsupp, 882 .vfs_statvfs = ntfs_statvfs, 883 .vfs_sync = ntfs_sync, 884 .vfs_vget = ntfs_vget, 885 .vfs_loadvnode = ntfs_loadvnode, 886 .vfs_fhtovp = ntfs_fhtovp, 887 .vfs_vptofh = ntfs_vptofh, 888 .vfs_init = ntfs_init, 889 .vfs_reinit = ntfs_reinit, 890 .vfs_done = ntfs_done, 891 .vfs_mountroot = ntfs_mountroot, 892 .vfs_snapshot = (void *)eopnotsupp, 893 .vfs_extattrctl = vfs_stdextattrctl, 894 .vfs_suspendctl = (void *)eopnotsupp, 895 .vfs_renamelock_enter = genfs_renamelock_enter, 896 .vfs_renamelock_exit = genfs_renamelock_exit, 897 .vfs_fsync = (void *)eopnotsupp, 898 .vfs_opv_descs = ntfs_vnodeopv_descs 899 }; 900 901 static int 902 ntfs_modcmd(modcmd_t cmd, void *arg) 903 { 904 int error; 905 906 switch (cmd) { 907 case MODULE_CMD_INIT: 908 error = vfs_attach(&ntfs_vfsops); 909 if (error != 0) 910 break; 911 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 912 CTLFLAG_PERMANENT, 913 CTLTYPE_NODE, "ntfs", 914 SYSCTL_DESCR("NTFS file system"), 915 NULL, 0, NULL, 0, 916 CTL_VFS, 20, CTL_EOL); 917 /* 918 * XXX the "20" above could be dynamic, thereby eliminating 919 * one more instance of the "number to vfs" mapping problem, 920 * but "20" is the order as taken from sys/mount.h 921 */ 922 break; 923 case MODULE_CMD_FINI: 924 error = vfs_detach(&ntfs_vfsops); 925 if (error != 0) 926 break; 927 sysctl_teardown(&ntfs_sysctl_log); 928 break; 929 default: 930 error = ENOTTY; 931 break; 932 } 933 934 return (error); 935 } 936