ntfs_vfsops.c revision 1.99
1 /* $NetBSD: ntfs_vfsops.c,v 1.99 2014/12/28 12:57:44 maxv 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 1.99 2014/12/28 12:57:44 maxv 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(struct mount *mp, const char *path, void *data, size_t *data_len) 164 { 165 struct lwp *l = curlwp; 166 int err = 0, flags; 167 struct vnode *devvp; 168 struct ntfs_args *args = data; 169 170 if (args == NULL) 171 return EINVAL; 172 if (*data_len < sizeof *args) 173 return EINVAL; 174 175 if (mp->mnt_flag & MNT_GETARGS) { 176 struct ntfsmount *ntmp = VFSTONTFS(mp); 177 if (ntmp == NULL) 178 return EIO; 179 args->fspec = NULL; 180 args->uid = ntmp->ntm_uid; 181 args->gid = ntmp->ntm_gid; 182 args->mode = ntmp->ntm_mode; 183 args->flag = ntmp->ntm_flag; 184 *data_len = sizeof *args; 185 return 0; 186 } 187 /* 188 *** 189 * Mounting non-root file system or updating a file system 190 *** 191 */ 192 193 /* 194 * If updating, check whether changing from read-only to 195 * read/write; if there is no device name, that's all we do. 196 */ 197 if (mp->mnt_flag & MNT_UPDATE) { 198 printf("ntfs_mount(): MNT_UPDATE not supported\n"); 199 return (EINVAL); 200 } 201 202 /* 203 * Not an update, or updating the name: look up the name 204 * and verify that it refers to a sensible block device. 205 */ 206 err = namei_simple_user(args->fspec, 207 NSM_FOLLOW_NOEMULROOT, &devvp); 208 if (err) 209 return (err); 210 211 if (devvp->v_type != VBLK) { 212 err = ENOTBLK; 213 goto fail; 214 } 215 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 216 err = ENXIO; 217 goto fail; 218 } 219 if (mp->mnt_flag & MNT_UPDATE) { 220 #if 0 221 /* 222 ******************** 223 * UPDATE 224 ******************** 225 */ 226 227 if (devvp != ntmp->um_devvp) { 228 err = EINVAL; /* needs translation */ 229 goto fail; 230 } 231 232 /* 233 * Update device name only on success 234 */ 235 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec, 236 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p); 237 if (err) 238 goto fail; 239 240 vrele(devvp); 241 #endif 242 } else { 243 /* 244 ******************** 245 * NEW MOUNT 246 ******************** 247 */ 248 249 /* 250 * Since this is a new mount, we want the names for 251 * the device and the mount point copied in. If an 252 * error occurs, the mountpoint is discarded by the 253 * upper level code. 254 */ 255 256 /* Save "last mounted on" info for mount point (NULL pad)*/ 257 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 258 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 259 if (err) 260 goto fail; 261 262 if (mp->mnt_flag & MNT_RDONLY) 263 flags = FREAD; 264 else 265 flags = FREAD|FWRITE; 266 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 267 err = VOP_OPEN(devvp, flags, FSCRED); 268 VOP_UNLOCK(devvp); 269 if (err) 270 goto fail; 271 err = ntfs_mountfs(devvp, mp, args, l); 272 if (err) { 273 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 274 (void)VOP_CLOSE(devvp, flags, NOCRED); 275 VOP_UNLOCK(devvp); 276 goto fail; 277 } 278 } 279 280 /* 281 * Initialize FS stat information in mount struct; uses both 282 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 283 * 284 * This code is common to root and non-root mounts 285 */ 286 (void)VFS_STATVFS(mp, &mp->mnt_stat); 287 return (err); 288 289 fail: 290 vrele(devvp); 291 return (err); 292 } 293 294 /* 295 * Common code for mount and mountroot 296 */ 297 int 298 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l) 299 { 300 struct buf *bp; 301 struct ntfsmount *ntmp; 302 dev_t dev = devvp->v_rdev; 303 int error, i; 304 struct vnode *vp; 305 306 ntmp = NULL; 307 308 /* 309 * Flush out any old buffers remaining from a previous use. 310 */ 311 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 312 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 313 VOP_UNLOCK(devvp); 314 if (error) 315 return (error); 316 317 bp = NULL; 318 319 error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp); 320 if (error) 321 goto out; 322 ntmp = malloc(sizeof(*ntmp), M_NTFSMNT, M_WAITOK|M_ZERO); 323 memcpy(&ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile)); 324 brelse(bp, 0); 325 bp = NULL; 326 327 /* Sanity checks. XXX: More checks are probably needed. */ 328 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 329 error = EINVAL; 330 dprintf(("ntfs_mountfs: invalid boot block\n")); 331 goto out; 332 } 333 if (ntmp->ntm_bps == 0) { 334 error = EINVAL; 335 dprintf(("ntfs_mountfs: invalid bytes per sector\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]) 461 vrele(ntmp->ntm_sysvn[i]); 462 463 if (vflush(mp, NULLVP, 0)) { 464 dprintf(("ntfs_mountfs: vflush failed\n")); 465 } 466 out: 467 spec_node_setmountedfs(devvp, NULL); 468 if (bp) 469 brelse(bp, 0); 470 471 if (error) { 472 if (ntmp) { 473 if (ntmp->ntm_ad) 474 free(ntmp->ntm_ad, M_NTFSMNT); 475 free(ntmp, M_NTFSMNT); 476 } 477 } 478 479 return (error); 480 } 481 482 static int 483 ntfs_start(struct mount *mp, int flags) 484 { 485 return (0); 486 } 487 488 static int 489 ntfs_unmount(struct mount *mp, int mntflags) 490 { 491 struct lwp *l = curlwp; 492 struct ntfsmount *ntmp; 493 int error, ronly = 0, flags, i; 494 495 dprintf(("ntfs_unmount: unmounting...\n")); 496 ntmp = VFSTONTFS(mp); 497 498 flags = 0; 499 if (mntflags & MNT_FORCE) 500 flags |= FORCECLOSE; 501 502 dprintf(("ntfs_unmount: vflushing...\n")); 503 error = vflush(mp, NULLVP, flags | SKIPSYSTEM); 504 if (error) { 505 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 506 return (error); 507 } 508 509 /* Check if only system vnodes are rest */ 510 for (i = 0; i < NTFS_SYSNODESNUM; i++) 511 if ((ntmp->ntm_sysvn[i]) && 512 (ntmp->ntm_sysvn[i]->v_usecount > 1)) 513 return (EBUSY); 514 515 /* Dereference all system vnodes */ 516 for (i = 0; i < NTFS_SYSNODESNUM; i++) 517 if (ntmp->ntm_sysvn[i]) 518 vrele(ntmp->ntm_sysvn[i]); 519 520 /* vflush system vnodes */ 521 error = vflush(mp, NULLVP, flags); 522 if (error) { 523 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 524 } 525 526 /* Check if the type of device node isn't VBAD before 527 * touching v_specinfo. If the device vnode is revoked, the 528 * field is NULL and touching it causes null pointer derefercence. 529 */ 530 if (ntmp->ntm_devvp->v_type != VBAD) 531 spec_node_setmountedfs(ntmp->ntm_devvp, NULL); 532 533 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 534 KASSERT(error == 0); 535 536 /* lock the device vnode before calling VOP_CLOSE() */ 537 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 538 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 539 NOCRED); 540 KASSERT(error == 0); 541 VOP_UNLOCK(ntmp->ntm_devvp); 542 543 vrele(ntmp->ntm_devvp); 544 545 /* free the toupper table, if this has been last mounted ntfs volume */ 546 ntfs_toupper_unuse(); 547 548 dprintf(("ntfs_umount: freeing memory...\n")); 549 mp->mnt_data = NULL; 550 mp->mnt_flag &= ~MNT_LOCAL; 551 free(ntmp->ntm_ad, M_NTFSMNT); 552 free(ntmp, M_NTFSMNT); 553 return (0); 554 } 555 556 static int 557 ntfs_root(struct mount *mp, struct vnode **vpp) 558 { 559 struct vnode *nvp; 560 int error = 0; 561 562 dprintf(("ntfs_root(): sysvn: %p\n", 563 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 564 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 565 if (error) { 566 printf("ntfs_root: VFS_VGET failed: %d\n", error); 567 return (error); 568 } 569 570 *vpp = nvp; 571 return (0); 572 } 573 574 int 575 ntfs_calccfree(struct ntfsmount *ntmp, cn_t *cfreep) 576 { 577 struct vnode *vp; 578 u_int8_t *tmp; 579 int j, error; 580 cn_t cfree = 0; 581 size_t bmsize, i; 582 583 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 584 bmsize = VTOF(vp)->f_size; 585 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 586 587 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 588 0, bmsize, tmp, NULL); 589 if (error) 590 goto out; 591 592 for (i = 0; i < bmsize; i++) 593 for (j = 0; j < 8; j++) 594 if (~tmp[i] & (1 << j)) 595 cfree++; 596 *cfreep = cfree; 597 598 out: 599 free(tmp, M_TEMP); 600 return(error); 601 } 602 603 static int 604 ntfs_statvfs(struct mount *mp, struct statvfs *sbp) 605 { 606 struct ntfsmount *ntmp = VFSTONTFS(mp); 607 u_int64_t mftallocated; 608 609 dprintf(("ntfs_statvfs():\n")); 610 611 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 612 613 sbp->f_bsize = ntmp->ntm_bps; 614 sbp->f_frsize = sbp->f_bsize; /* XXX */ 615 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 616 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 617 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 618 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 619 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 620 sbp->f_ffree; 621 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 622 sbp->f_flag = mp->mnt_flag; 623 copy_statvfs_info(sbp, mp); 624 return (0); 625 } 626 627 static int 628 ntfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 629 { 630 /*dprintf(("ntfs_sync():\n"));*/ 631 return (0); 632 } 633 634 /*ARGSUSED*/ 635 static int 636 ntfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 637 { 638 struct ntfid ntfh; 639 int error; 640 641 if (fhp->fid_len != sizeof(struct ntfid)) 642 return EINVAL; 643 memcpy(&ntfh, fhp, sizeof(ntfh)); 644 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 645 (unsigned long long)ntfh.ntfid_ino)); 646 647 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, "", 648 LK_EXCLUSIVE, vpp); 649 if (error != 0) { 650 *vpp = NULLVP; 651 return (error); 652 } 653 654 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 655 * with NTFS, we don't need to check anything else for now */ 656 return (0); 657 } 658 659 static int 660 ntfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 661 { 662 struct ntnode *ntp; 663 struct ntfid ntfh; 664 struct fnode *fn; 665 666 if (*fh_size < sizeof(struct ntfid)) { 667 *fh_size = sizeof(struct ntfid); 668 return E2BIG; 669 } 670 *fh_size = sizeof(struct ntfid); 671 672 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 673 vp)); 674 675 fn = VTOF(vp); 676 ntp = VTONT(vp); 677 memset(&ntfh, 0, sizeof(ntfh)); 678 ntfh.ntfid_len = sizeof(struct ntfid); 679 ntfh.ntfid_ino = ntp->i_number; 680 ntfh.ntfid_attr = fn->f_attrtype; 681 #ifdef notyet 682 ntfh.ntfid_gen = ntp->i_gen; 683 #endif 684 memcpy(fhp, &ntfh, sizeof(ntfh)); 685 return (0); 686 } 687 688 static int 689 ntfs_loadvnode(struct mount *mp, struct vnode *vp, 690 const void *key, size_t key_len, const void **new_key) 691 { 692 int error; 693 struct ntvattr *vap; 694 struct ntkey small_key, *ntkey; 695 struct ntfsmount *ntmp; 696 struct ntnode *ip; 697 struct fnode *fp = NULL; 698 enum vtype f_type = VBAD; 699 700 if (key_len <= sizeof(small_key)) 701 ntkey = &small_key; 702 else 703 ntkey = kmem_alloc(key_len, KM_SLEEP); 704 memcpy(ntkey, key, key_len); 705 706 dprintf(("ntfs_loadvnode: ino: %llu, attr: 0x%x:%s", 707 (unsigned long long)ntkey->k_ino, 708 ntkey->k_attrtype, ntkey->k_attrname)); 709 710 ntmp = VFSTONTFS(mp); 711 712 /* Get ntnode */ 713 error = ntfs_ntlookup(ntmp, ntkey->k_ino, &ip); 714 if (error) { 715 printf("ntfs_loadvnode: ntfs_ntget failed\n"); 716 goto out; 717 } 718 /* It may be not initialized fully, so force load it */ 719 if (!(ip->i_flag & IN_LOADED)) { 720 error = ntfs_loadntnode(ntmp, ip); 721 if (error) { 722 printf("ntfs_loadvnode: CAN'T LOAD ATTRIBUTES FOR INO:" 723 " %llu\n", (unsigned long long)ip->i_number); 724 ntfs_ntput(ip); 725 goto out; 726 } 727 } 728 729 /* Setup fnode */ 730 fp = kmem_zalloc(sizeof(*fp), KM_SLEEP); 731 dprintf(("%s: allocating fnode: %p\n", __func__, fp)); 732 733 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap); 734 if (error) { 735 ntfs_ntput(ip); 736 goto out; 737 } 738 fp->f_fflag = vap->va_a_name->n_flag; 739 fp->f_pnumber = vap->va_a_name->n_pnumber; 740 fp->f_times = vap->va_a_name->n_times; 741 ntfs_ntvattrrele(vap); 742 743 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 744 (ntkey->k_attrtype == NTFS_A_DATA && 745 strcmp(ntkey->k_attrname, "") == 0)) { 746 f_type = VDIR; 747 } else { 748 f_type = VREG; 749 error = ntfs_ntvattrget(ntmp, ip, 750 ntkey->k_attrtype, ntkey->k_attrname, 0, &vap); 751 if (error == 0) { 752 fp->f_size = vap->va_datalen; 753 fp->f_allocated = vap->va_allocated; 754 ntfs_ntvattrrele(vap); 755 } else if (ntkey->k_attrtype == NTFS_A_DATA && 756 strcmp(ntkey->k_attrname, "") == 0 && 757 error == ENOENT) { 758 fp->f_size = 0; 759 fp->f_allocated = 0; 760 error = 0; 761 } else 762 goto out; 763 } 764 765 if (key_len <= sizeof(fp->f_smallkey)) 766 fp->f_key = &fp->f_smallkey; 767 else 768 fp->f_key = kmem_alloc(key_len, KM_SLEEP); 769 fp->f_ip = ip; 770 fp->f_ino = ip->i_number; 771 strcpy(fp->f_attrname, ntkey->k_attrname); 772 fp->f_attrtype = ntkey->k_attrtype; 773 fp->f_vp = vp; 774 vp->v_data = fp; 775 776 vp->v_tag = VT_NTFS; 777 vp->v_type = f_type; 778 vp->v_op = ntfs_vnodeop_p; 779 ntfs_ntref(ip); 780 vref(ip->i_devvp); 781 genfs_node_init(vp, &ntfs_genfsops); 782 783 if (ip->i_number == NTFS_ROOTINO) 784 vp->v_vflag |= VV_ROOT; 785 786 uvm_vnp_setsize(vp, fp->f_size); 787 ntfs_ntput(ip); 788 789 *new_key = fp->f_key; 790 791 fp = NULL; 792 793 out: 794 if (ntkey != &small_key) 795 kmem_free(ntkey, key_len); 796 if (fp) 797 kmem_free(fp, sizeof(*fp)); 798 799 return error; 800 } 801 802 static int 803 ntfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 804 { 805 return ntfs_vgetex(mp, ino, NTFS_A_DATA, "", LK_EXCLUSIVE, vpp); 806 } 807 808 int 809 ntfs_vgetex(struct mount *mp, ino_t ino, u_int32_t attrtype, 810 const char *attrname, u_long lkflags, struct vnode **vpp) 811 { 812 const int attrlen = strlen(attrname); 813 int error; 814 struct ntkey small_key, *ntkey; 815 816 if (NTKEY_SIZE(attrlen) <= sizeof(small_key)) 817 ntkey = &small_key; 818 else 819 ntkey = malloc(NTKEY_SIZE(attrlen), M_TEMP, M_WAITOK); 820 ntkey->k_ino = ino; 821 ntkey->k_attrtype = attrtype; 822 strcpy(ntkey->k_attrname, attrname); 823 824 error = vcache_get(mp, ntkey, NTKEY_SIZE(attrlen), vpp); 825 if (error) 826 goto out; 827 828 if ((lkflags & (LK_SHARED | LK_EXCLUSIVE)) != 0) { 829 error = vn_lock(*vpp, lkflags); 830 if (error) { 831 vrele(*vpp); 832 *vpp = NULL; 833 } 834 } 835 836 out: 837 if (ntkey != &small_key) 838 free(ntkey, M_TEMP); 839 return error; 840 } 841 842 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 843 844 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 845 &ntfs_vnodeop_opv_desc, 846 NULL, 847 }; 848 849 struct vfsops ntfs_vfsops = { 850 .vfs_name = MOUNT_NTFS, 851 .vfs_min_mount_data = sizeof (struct ntfs_args), 852 .vfs_mount = ntfs_mount, 853 .vfs_start = ntfs_start, 854 .vfs_unmount = ntfs_unmount, 855 .vfs_root = ntfs_root, 856 .vfs_quotactl = (void *)eopnotsupp, 857 .vfs_statvfs = ntfs_statvfs, 858 .vfs_sync = ntfs_sync, 859 .vfs_vget = ntfs_vget, 860 .vfs_loadvnode = ntfs_loadvnode, 861 .vfs_fhtovp = ntfs_fhtovp, 862 .vfs_vptofh = ntfs_vptofh, 863 .vfs_init = ntfs_init, 864 .vfs_reinit = ntfs_reinit, 865 .vfs_done = ntfs_done, 866 .vfs_mountroot = ntfs_mountroot, 867 .vfs_snapshot = (void *)eopnotsupp, 868 .vfs_extattrctl = vfs_stdextattrctl, 869 .vfs_suspendctl = (void *)eopnotsupp, 870 .vfs_renamelock_enter = genfs_renamelock_enter, 871 .vfs_renamelock_exit = genfs_renamelock_exit, 872 .vfs_fsync = (void *)eopnotsupp, 873 .vfs_opv_descs = ntfs_vnodeopv_descs 874 }; 875 876 static int 877 ntfs_modcmd(modcmd_t cmd, void *arg) 878 { 879 int error; 880 881 switch (cmd) { 882 case MODULE_CMD_INIT: 883 error = vfs_attach(&ntfs_vfsops); 884 if (error != 0) 885 break; 886 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 887 CTLFLAG_PERMANENT, 888 CTLTYPE_NODE, "ntfs", 889 SYSCTL_DESCR("NTFS file system"), 890 NULL, 0, NULL, 0, 891 CTL_VFS, 20, CTL_EOL); 892 /* 893 * XXX the "20" above could be dynamic, thereby eliminating 894 * one more instance of the "number to vfs" mapping problem, 895 * but "20" is the order as taken from sys/mount.h 896 */ 897 break; 898 case MODULE_CMD_FINI: 899 error = vfs_detach(&ntfs_vfsops); 900 if (error != 0) 901 break; 902 sysctl_teardown(&ntfs_sysctl_log); 903 break; 904 default: 905 error = ENOTTY; 906 break; 907 } 908 909 return (error); 910 } 911
Indexes created Fri Sep 26 08:10:20 GMT 2025