ntfs_vfsops.c revision 1.100
1 /* $NetBSD: ntfs_vfsops.c,v 1.100 2014/12/28 13:11:52 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 1.100 2014/12/28 13:11:52 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 if (ntmp->ntm_spc == 0) { 339 error = EINVAL; 340 dprintf(("ntfs_mountfs: invalid sectors per cluster\n")); 341 goto out; 342 } 343 344 { 345 int8_t cpr = ntmp->ntm_mftrecsz; 346 if (cpr > 0) 347 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 348 else 349 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 350 } 351 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 352 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media, 353 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec)); 354 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 355 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn)); 356 357 ntmp->ntm_mountp = mp; 358 ntmp->ntm_dev = dev; 359 ntmp->ntm_devvp = devvp; 360 ntmp->ntm_uid = argsp->uid; 361 ntmp->ntm_gid = argsp->gid; 362 ntmp->ntm_mode = argsp->mode; 363 ntmp->ntm_flag = argsp->flag; 364 mp->mnt_data = ntmp; 365 366 /* set file name encode/decode hooks XXX utf-8 only for now */ 367 ntmp->ntm_wget = ntfs_utf8_wget; 368 ntmp->ntm_wput = ntfs_utf8_wput; 369 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 370 371 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 372 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 373 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 374 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 375 376 /* 377 * We read in some system nodes to do not allow 378 * reclaim them and to have everytime access to them. 379 */ 380 { 381 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 382 for (i = 0; i < 3; i++) { 383 error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]])); 384 if (error) 385 goto out1; 386 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM; 387 vref(ntmp->ntm_sysvn[pi[i]]); 388 vput(ntmp->ntm_sysvn[pi[i]]); 389 } 390 } 391 392 /* read the Unicode lowercase --> uppercase translation table, 393 * if necessary */ 394 if ((error = ntfs_toupper_use(mp, ntmp))) 395 goto out1; 396 397 /* 398 * Scan $BitMap and count free clusters 399 */ 400 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree); 401 if (error) 402 goto out1; 403 404 /* 405 * Read and translate to internal format attribute 406 * definition file. 407 */ 408 { 409 int num,j; 410 struct attrdef ad; 411 412 /* Open $AttrDef */ 413 error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp ); 414 if (error) 415 goto out1; 416 417 /* Count valid entries */ 418 for (num = 0; ; num++) { 419 error = ntfs_readattr(ntmp, VTONT(vp), 420 NTFS_A_DATA, NULL, 421 num * sizeof(ad), sizeof(ad), 422 &ad, NULL); 423 if (error) 424 goto out1; 425 if (ad.ad_name[0] == 0) 426 break; 427 } 428 429 /* Alloc memory for attribute definitions */ 430 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 431 num * sizeof(struct ntvattrdef), 432 M_NTFSMNT, M_WAITOK); 433 434 ntmp->ntm_adnum = num; 435 436 /* Read them and translate */ 437 for (i = 0; i < num; i++) { 438 error = ntfs_readattr(ntmp, VTONT(vp), 439 NTFS_A_DATA, NULL, 440 i * sizeof(ad), sizeof(ad), 441 &ad, NULL); 442 if (error) 443 goto out1; 444 j = 0; 445 do { 446 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j]; 447 } while(ad.ad_name[j++]); 448 ntmp->ntm_ad[i].ad_namelen = j - 1; 449 ntmp->ntm_ad[i].ad_type = ad.ad_type; 450 } 451 452 vput(vp); 453 } 454 455 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev; 456 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 457 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 458 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 459 mp->mnt_flag |= MNT_LOCAL; 460 spec_node_setmountedfs(devvp, mp); 461 return (0); 462 463 out1: 464 for (i = 0; i < NTFS_SYSNODESNUM; i++) 465 if (ntmp->ntm_sysvn[i]) 466 vrele(ntmp->ntm_sysvn[i]); 467 468 if (vflush(mp, NULLVP, 0)) { 469 dprintf(("ntfs_mountfs: vflush failed\n")); 470 } 471 out: 472 spec_node_setmountedfs(devvp, NULL); 473 if (bp) 474 brelse(bp, 0); 475 476 if (error) { 477 if (ntmp) { 478 if (ntmp->ntm_ad) 479 free(ntmp->ntm_ad, M_NTFSMNT); 480 free(ntmp, M_NTFSMNT); 481 } 482 } 483 484 return (error); 485 } 486 487 static int 488 ntfs_start(struct mount *mp, int flags) 489 { 490 return (0); 491 } 492 493 static int 494 ntfs_unmount(struct mount *mp, int mntflags) 495 { 496 struct lwp *l = curlwp; 497 struct ntfsmount *ntmp; 498 int error, ronly = 0, flags, i; 499 500 dprintf(("ntfs_unmount: unmounting...\n")); 501 ntmp = VFSTONTFS(mp); 502 503 flags = 0; 504 if (mntflags & MNT_FORCE) 505 flags |= FORCECLOSE; 506 507 dprintf(("ntfs_unmount: vflushing...\n")); 508 error = vflush(mp, NULLVP, flags | SKIPSYSTEM); 509 if (error) { 510 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 511 return (error); 512 } 513 514 /* Check if only system vnodes are rest */ 515 for (i = 0; i < NTFS_SYSNODESNUM; i++) 516 if ((ntmp->ntm_sysvn[i]) && 517 (ntmp->ntm_sysvn[i]->v_usecount > 1)) 518 return (EBUSY); 519 520 /* Dereference all system vnodes */ 521 for (i = 0; i < NTFS_SYSNODESNUM; i++) 522 if (ntmp->ntm_sysvn[i]) 523 vrele(ntmp->ntm_sysvn[i]); 524 525 /* vflush system vnodes */ 526 error = vflush(mp, NULLVP, flags); 527 if (error) { 528 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 529 } 530 531 /* Check if the type of device node isn't VBAD before 532 * touching v_specinfo. If the device vnode is revoked, the 533 * field is NULL and touching it causes null pointer derefercence. 534 */ 535 if (ntmp->ntm_devvp->v_type != VBAD) 536 spec_node_setmountedfs(ntmp->ntm_devvp, NULL); 537 538 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 539 KASSERT(error == 0); 540 541 /* lock the device vnode before calling VOP_CLOSE() */ 542 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 543 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 544 NOCRED); 545 KASSERT(error == 0); 546 VOP_UNLOCK(ntmp->ntm_devvp); 547 548 vrele(ntmp->ntm_devvp); 549 550 /* free the toupper table, if this has been last mounted ntfs volume */ 551 ntfs_toupper_unuse(); 552 553 dprintf(("ntfs_umount: freeing memory...\n")); 554 mp->mnt_data = NULL; 555 mp->mnt_flag &= ~MNT_LOCAL; 556 free(ntmp->ntm_ad, M_NTFSMNT); 557 free(ntmp, M_NTFSMNT); 558 return (0); 559 } 560 561 static int 562 ntfs_root(struct mount *mp, struct vnode **vpp) 563 { 564 struct vnode *nvp; 565 int error = 0; 566 567 dprintf(("ntfs_root(): sysvn: %p\n", 568 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 569 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 570 if (error) { 571 printf("ntfs_root: VFS_VGET failed: %d\n", error); 572 return (error); 573 } 574 575 *vpp = nvp; 576 return (0); 577 } 578 579 int 580 ntfs_calccfree(struct ntfsmount *ntmp, 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 bmsize = VTOF(vp)->f_size; 590 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 591 592 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 593 0, bmsize, tmp, NULL); 594 if (error) 595 goto out; 596 597 for (i = 0; i < bmsize; i++) 598 for (j = 0; j < 8; j++) 599 if (~tmp[i] & (1 << j)) 600 cfree++; 601 *cfreep = cfree; 602 603 out: 604 free(tmp, M_TEMP); 605 return(error); 606 } 607 608 static int 609 ntfs_statvfs(struct mount *mp, struct statvfs *sbp) 610 { 611 struct ntfsmount *ntmp = VFSTONTFS(mp); 612 u_int64_t mftallocated; 613 614 dprintf(("ntfs_statvfs():\n")); 615 616 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 617 618 sbp->f_bsize = ntmp->ntm_bps; 619 sbp->f_frsize = sbp->f_bsize; /* XXX */ 620 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 621 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 622 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 623 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 624 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 625 sbp->f_ffree; 626 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 627 sbp->f_flag = mp->mnt_flag; 628 copy_statvfs_info(sbp, mp); 629 return (0); 630 } 631 632 static int 633 ntfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 634 { 635 /*dprintf(("ntfs_sync():\n"));*/ 636 return (0); 637 } 638 639 /*ARGSUSED*/ 640 static int 641 ntfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 642 { 643 struct ntfid ntfh; 644 int error; 645 646 if (fhp->fid_len != sizeof(struct ntfid)) 647 return EINVAL; 648 memcpy(&ntfh, fhp, sizeof(ntfh)); 649 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 650 (unsigned long long)ntfh.ntfid_ino)); 651 652 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, "", 653 LK_EXCLUSIVE, vpp); 654 if (error != 0) { 655 *vpp = NULLVP; 656 return (error); 657 } 658 659 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 660 * with NTFS, we don't need to check anything else for now */ 661 return (0); 662 } 663 664 static int 665 ntfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 666 { 667 struct ntnode *ntp; 668 struct ntfid ntfh; 669 struct fnode *fn; 670 671 if (*fh_size < sizeof(struct ntfid)) { 672 *fh_size = sizeof(struct ntfid); 673 return E2BIG; 674 } 675 *fh_size = sizeof(struct ntfid); 676 677 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 678 vp)); 679 680 fn = VTOF(vp); 681 ntp = VTONT(vp); 682 memset(&ntfh, 0, sizeof(ntfh)); 683 ntfh.ntfid_len = sizeof(struct ntfid); 684 ntfh.ntfid_ino = ntp->i_number; 685 ntfh.ntfid_attr = fn->f_attrtype; 686 #ifdef notyet 687 ntfh.ntfid_gen = ntp->i_gen; 688 #endif 689 memcpy(fhp, &ntfh, sizeof(ntfh)); 690 return (0); 691 } 692 693 static int 694 ntfs_loadvnode(struct mount *mp, struct vnode *vp, 695 const void *key, size_t key_len, const void **new_key) 696 { 697 int error; 698 struct ntvattr *vap; 699 struct ntkey small_key, *ntkey; 700 struct ntfsmount *ntmp; 701 struct ntnode *ip; 702 struct fnode *fp = NULL; 703 enum vtype f_type = VBAD; 704 705 if (key_len <= sizeof(small_key)) 706 ntkey = &small_key; 707 else 708 ntkey = kmem_alloc(key_len, KM_SLEEP); 709 memcpy(ntkey, key, key_len); 710 711 dprintf(("ntfs_loadvnode: ino: %llu, attr: 0x%x:%s", 712 (unsigned long long)ntkey->k_ino, 713 ntkey->k_attrtype, ntkey->k_attrname)); 714 715 ntmp = VFSTONTFS(mp); 716 717 /* Get ntnode */ 718 error = ntfs_ntlookup(ntmp, ntkey->k_ino, &ip); 719 if (error) { 720 printf("ntfs_loadvnode: ntfs_ntget failed\n"); 721 goto out; 722 } 723 /* It may be not initialized fully, so force load it */ 724 if (!(ip->i_flag & IN_LOADED)) { 725 error = ntfs_loadntnode(ntmp, ip); 726 if (error) { 727 printf("ntfs_loadvnode: CAN'T LOAD ATTRIBUTES FOR INO:" 728 " %llu\n", (unsigned long long)ip->i_number); 729 ntfs_ntput(ip); 730 goto out; 731 } 732 } 733 734 /* Setup fnode */ 735 fp = kmem_zalloc(sizeof(*fp), KM_SLEEP); 736 dprintf(("%s: allocating fnode: %p\n", __func__, fp)); 737 738 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap); 739 if (error) { 740 ntfs_ntput(ip); 741 goto out; 742 } 743 fp->f_fflag = vap->va_a_name->n_flag; 744 fp->f_pnumber = vap->va_a_name->n_pnumber; 745 fp->f_times = vap->va_a_name->n_times; 746 ntfs_ntvattrrele(vap); 747 748 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 749 (ntkey->k_attrtype == NTFS_A_DATA && 750 strcmp(ntkey->k_attrname, "") == 0)) { 751 f_type = VDIR; 752 } else { 753 f_type = VREG; 754 error = ntfs_ntvattrget(ntmp, ip, 755 ntkey->k_attrtype, ntkey->k_attrname, 0, &vap); 756 if (error == 0) { 757 fp->f_size = vap->va_datalen; 758 fp->f_allocated = vap->va_allocated; 759 ntfs_ntvattrrele(vap); 760 } else if (ntkey->k_attrtype == NTFS_A_DATA && 761 strcmp(ntkey->k_attrname, "") == 0 && 762 error == ENOENT) { 763 fp->f_size = 0; 764 fp->f_allocated = 0; 765 error = 0; 766 } else 767 goto out; 768 } 769 770 if (key_len <= sizeof(fp->f_smallkey)) 771 fp->f_key = &fp->f_smallkey; 772 else 773 fp->f_key = kmem_alloc(key_len, KM_SLEEP); 774 fp->f_ip = ip; 775 fp->f_ino = ip->i_number; 776 strcpy(fp->f_attrname, ntkey->k_attrname); 777 fp->f_attrtype = ntkey->k_attrtype; 778 fp->f_vp = vp; 779 vp->v_data = fp; 780 781 vp->v_tag = VT_NTFS; 782 vp->v_type = f_type; 783 vp->v_op = ntfs_vnodeop_p; 784 ntfs_ntref(ip); 785 vref(ip->i_devvp); 786 genfs_node_init(vp, &ntfs_genfsops); 787 788 if (ip->i_number == NTFS_ROOTINO) 789 vp->v_vflag |= VV_ROOT; 790 791 uvm_vnp_setsize(vp, fp->f_size); 792 ntfs_ntput(ip); 793 794 *new_key = fp->f_key; 795 796 fp = NULL; 797 798 out: 799 if (ntkey != &small_key) 800 kmem_free(ntkey, key_len); 801 if (fp) 802 kmem_free(fp, sizeof(*fp)); 803 804 return error; 805 } 806 807 static int 808 ntfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 809 { 810 return ntfs_vgetex(mp, ino, NTFS_A_DATA, "", LK_EXCLUSIVE, vpp); 811 } 812 813 int 814 ntfs_vgetex(struct mount *mp, ino_t ino, u_int32_t attrtype, 815 const char *attrname, u_long lkflags, struct vnode **vpp) 816 { 817 const int attrlen = strlen(attrname); 818 int error; 819 struct ntkey small_key, *ntkey; 820 821 if (NTKEY_SIZE(attrlen) <= sizeof(small_key)) 822 ntkey = &small_key; 823 else 824 ntkey = malloc(NTKEY_SIZE(attrlen), M_TEMP, M_WAITOK); 825 ntkey->k_ino = ino; 826 ntkey->k_attrtype = attrtype; 827 strcpy(ntkey->k_attrname, attrname); 828 829 error = vcache_get(mp, ntkey, NTKEY_SIZE(attrlen), vpp); 830 if (error) 831 goto out; 832 833 if ((lkflags & (LK_SHARED | LK_EXCLUSIVE)) != 0) { 834 error = vn_lock(*vpp, lkflags); 835 if (error) { 836 vrele(*vpp); 837 *vpp = NULL; 838 } 839 } 840 841 out: 842 if (ntkey != &small_key) 843 free(ntkey, M_TEMP); 844 return error; 845 } 846 847 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 848 849 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 850 &ntfs_vnodeop_opv_desc, 851 NULL, 852 }; 853 854 struct vfsops ntfs_vfsops = { 855 .vfs_name = MOUNT_NTFS, 856 .vfs_min_mount_data = sizeof (struct ntfs_args), 857 .vfs_mount = ntfs_mount, 858 .vfs_start = ntfs_start, 859 .vfs_unmount = ntfs_unmount, 860 .vfs_root = ntfs_root, 861 .vfs_quotactl = (void *)eopnotsupp, 862 .vfs_statvfs = ntfs_statvfs, 863 .vfs_sync = ntfs_sync, 864 .vfs_vget = ntfs_vget, 865 .vfs_loadvnode = ntfs_loadvnode, 866 .vfs_fhtovp = ntfs_fhtovp, 867 .vfs_vptofh = ntfs_vptofh, 868 .vfs_init = ntfs_init, 869 .vfs_reinit = ntfs_reinit, 870 .vfs_done = ntfs_done, 871 .vfs_mountroot = ntfs_mountroot, 872 .vfs_snapshot = (void *)eopnotsupp, 873 .vfs_extattrctl = vfs_stdextattrctl, 874 .vfs_suspendctl = (void *)eopnotsupp, 875 .vfs_renamelock_enter = genfs_renamelock_enter, 876 .vfs_renamelock_exit = genfs_renamelock_exit, 877 .vfs_fsync = (void *)eopnotsupp, 878 .vfs_opv_descs = ntfs_vnodeopv_descs 879 }; 880 881 static int 882 ntfs_modcmd(modcmd_t cmd, void *arg) 883 { 884 int error; 885 886 switch (cmd) { 887 case MODULE_CMD_INIT: 888 error = vfs_attach(&ntfs_vfsops); 889 if (error != 0) 890 break; 891 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 892 CTLFLAG_PERMANENT, 893 CTLTYPE_NODE, "ntfs", 894 SYSCTL_DESCR("NTFS file system"), 895 NULL, 0, NULL, 0, 896 CTL_VFS, 20, CTL_EOL); 897 /* 898 * XXX the "20" above could be dynamic, thereby eliminating 899 * one more instance of the "number to vfs" mapping problem, 900 * but "20" is the order as taken from sys/mount.h 901 */ 902 break; 903 case MODULE_CMD_FINI: 904 error = vfs_detach(&ntfs_vfsops); 905 if (error != 0) 906 break; 907 sysctl_teardown(&ntfs_sysctl_log); 908 break; 909 default: 910 error = ENOTTY; 911 break; 912 } 913 914 return (error); 915 } 916
Indexes created Tue Sep 23 13:09:54 GMT 2025