1 /* $NetBSD: ntfs_vnops.c,v 1.59 2014/11/13 16:51:53 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * John Heidemann of the UCLA Ficus project. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Id: ntfs_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp 35 * 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: ntfs_vnops.c,v 1.59 2014/11/13 16:51:53 hannken Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/time.h> 45 #include <sys/stat.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/namei.h> 49 #include <sys/malloc.h> 50 #include <sys/buf.h> 51 #include <sys/dirent.h> 52 #include <sys/kauth.h> 53 #include <sys/sysctl.h> 54 55 56 #include <fs/ntfs/ntfs.h> 57 #include <fs/ntfs/ntfs_inode.h> 58 #include <fs/ntfs/ntfs_subr.h> 59 #include <fs/ntfs/ntfs_vfsops.h> 60 #include <miscfs/specfs/specdev.h> 61 #include <miscfs/genfs/genfs.h> 62 63 #include <sys/unistd.h> /* for pathconf(2) constants */ 64 65 static int ntfs_bypass(void *); 66 static int ntfs_read(void *); 67 static int ntfs_write(void *); 68 static int ntfs_getattr(void *); 69 static int ntfs_inactive(void *); 70 static int ntfs_print(void *); 71 static int ntfs_reclaim(void *); 72 static int ntfs_strategy(void *); 73 static int ntfs_access(void *); 74 static int ntfs_open(void *); 75 static int ntfs_close(void *); 76 static int ntfs_readdir(void *); 77 static int ntfs_lookup(void *); 78 static int ntfs_bmap(void *); 79 static int ntfs_fsync(void *); 80 static int ntfs_pathconf(void *); 81 82 extern int prtactive; 83 84 /* 85 * This is a noop, simply returning what one has been given. 86 */ 87 int 88 ntfs_bmap(void *v) 89 { 90 struct vop_bmap_args /* { 91 struct vnode *a_vp; 92 daddr_t a_bn; 93 struct vnode **a_vpp; 94 daddr_t *a_bnp; 95 int *a_runp; 96 int *a_runb; 97 } */ *ap = v; 98 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 99 if (ap->a_vpp != NULL) 100 *ap->a_vpp = ap->a_vp; 101 if (ap->a_bnp != NULL) 102 *ap->a_bnp = ap->a_bn; 103 if (ap->a_runp != NULL) 104 *ap->a_runp = 0; 105 return (0); 106 } 107 108 static int 109 ntfs_read(void *v) 110 { 111 struct vop_read_args /* { 112 struct vnode *a_vp; 113 struct uio *a_uio; 114 int a_ioflag; 115 kauth_cred_t a_cred; 116 } */ *ap = v; 117 struct vnode *vp = ap->a_vp; 118 struct fnode *fp = VTOF(vp); 119 struct ntnode *ip = FTONT(fp); 120 struct uio *uio = ap->a_uio; 121 struct ntfsmount *ntmp = ip->i_mp; 122 u_int64_t toread; 123 int error; 124 125 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n", 126 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 127 (long long)uio->uio_resid)); 128 129 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size)); 130 131 /* don't allow reading after end of file */ 132 if (uio->uio_offset > fp->f_size) 133 toread = 0; 134 else 135 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); 136 137 dprintf((", toread: %qu\n",(long long)toread)); 138 139 if (toread == 0) 140 return (0); 141 142 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 143 fp->f_attrname, uio->uio_offset, toread, NULL, uio); 144 if (error) { 145 printf("ntfs_read: ntfs_readattr failed: %d\n",error); 146 return (error); 147 } 148 149 return (0); 150 } 151 152 static int 153 ntfs_bypass(void *v) 154 { 155 struct vop_generic_args /* { 156 struct vnodeop_desc *a_desc; 157 <other random data follows, presumably> 158 } */ *ap __unused = v; 159 int error = ENOTTY; 160 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name)); 161 return (error); 162 } 163 164 165 static int 166 ntfs_getattr(void *v) 167 { 168 struct vop_getattr_args /* { 169 struct vnode *a_vp; 170 struct vattr *a_vap; 171 kauth_cred_t a_cred; 172 } */ *ap = v; 173 struct vnode *vp = ap->a_vp; 174 struct fnode *fp = VTOF(vp); 175 struct ntnode *ip = FTONT(fp); 176 struct vattr *vap = ap->a_vap; 177 178 dprintf(("ntfs_getattr: %llu, flags: %d\n", 179 (unsigned long long)ip->i_number, ip->i_flag)); 180 181 vap->va_fsid = ip->i_dev; 182 vap->va_fileid = ip->i_number; 183 vap->va_mode = ip->i_mp->ntm_mode; 184 vap->va_nlink = ip->i_nlink; 185 vap->va_uid = ip->i_mp->ntm_uid; 186 vap->va_gid = ip->i_mp->ntm_gid; 187 vap->va_rdev = 0; /* XXX UNODEV ? */ 188 vap->va_size = fp->f_size; 189 vap->va_bytes = fp->f_allocated; 190 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 191 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 192 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 193 vap->va_flags = ip->i_flag; 194 vap->va_gen = 0; 195 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 196 vap->va_type = vp->v_type; 197 vap->va_filerev = 0; 198 return (0); 199 } 200 201 202 /* 203 * Last reference to an ntnode. If necessary, write or delete it. 204 */ 205 int 206 ntfs_inactive(void *v) 207 { 208 struct vop_inactive_args /* { 209 struct vnode *a_vp; 210 } */ *ap = v; 211 struct vnode *vp = ap->a_vp; 212 #ifdef NTFS_DEBUG 213 struct ntnode *ip = VTONT(vp); 214 #endif 215 216 dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n", vp, 217 (unsigned long long)ip->i_number)); 218 219 VOP_UNLOCK(vp); 220 221 /* XXX since we don't support any filesystem changes 222 * right now, nothing more needs to be done 223 */ 224 return (0); 225 } 226 227 /* 228 * Reclaim an fnode/ntnode so that it can be used for other purposes. 229 */ 230 int 231 ntfs_reclaim(void *v) 232 { 233 struct vop_reclaim_args /* { 234 struct vnode *a_vp; 235 } */ *ap = v; 236 struct vnode *vp = ap->a_vp; 237 struct fnode *fp = VTOF(vp); 238 struct ntnode *ip = FTONT(fp); 239 const int attrlen = strlen(fp->f_attrname); 240 int error; 241 242 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp, 243 (unsigned long long)ip->i_number)); 244 245 if (prtactive && vp->v_usecount > 1) 246 vprint("ntfs_reclaim: pushing active", vp); 247 248 if ((error = ntfs_ntget(ip)) != 0) 249 return (error); 250 251 vcache_remove(vp->v_mount, fp->f_key, NTKEY_SIZE(attrlen)); 252 253 if (ip->i_devvp) { 254 vrele(ip->i_devvp); 255 ip->i_devvp = NULL; 256 } 257 genfs_node_destroy(vp); 258 vp->v_data = NULL; 259 260 /* Destroy fnode. */ 261 if (fp->f_key != &fp->f_smallkey) 262 kmem_free(fp->f_key, NTKEY_SIZE(attrlen)); 263 if (fp->f_dirblbuf) 264 free(fp->f_dirblbuf, M_NTFSDIR); 265 kmem_free(fp, sizeof(*fp)); 266 ntfs_ntrele(ip); 267 268 ntfs_ntput(ip); 269 270 return (0); 271 } 272 273 static int 274 ntfs_print(void *v) 275 { 276 struct vop_print_args /* { 277 struct vnode *a_vp; 278 } */ *ap = v; 279 struct ntnode *ip = VTONT(ap->a_vp); 280 281 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 282 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 283 ip->i_nlink); 284 printf(" "); 285 printf("\n"); 286 return (0); 287 } 288 289 /* 290 * Calculate the logical to physical mapping if not done already, 291 * then call the device strategy routine. 292 */ 293 int 294 ntfs_strategy(void *v) 295 { 296 struct vop_strategy_args /* { 297 struct vnode *a_vp; 298 struct buf *a_bp; 299 } */ *ap = v; 300 struct buf *bp = ap->a_bp; 301 struct vnode *vp = ap->a_vp; 302 struct fnode *fp = VTOF(vp); 303 struct ntnode *ip = FTONT(fp); 304 struct ntfsmount *ntmp = ip->i_mp; 305 int error; 306 307 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 308 (u_int32_t)bp->b_blkno, 309 (u_int32_t)bp->b_lblkno)); 310 311 dprintf(("strategy: bcount: %u flags: 0x%x\n", 312 (u_int32_t)bp->b_bcount,bp->b_flags)); 313 314 if (bp->b_flags & B_READ) { 315 u_int32_t toread; 316 317 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 318 clrbuf(bp); 319 error = 0; 320 } else { 321 toread = MIN(bp->b_bcount, 322 fp->f_size - ntfs_cntob(bp->b_blkno)); 323 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 324 toread,(u_int32_t)fp->f_size)); 325 326 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 327 fp->f_attrname, ntfs_cntob(bp->b_blkno), 328 toread, bp->b_data, NULL); 329 330 if (error) { 331 printf("ntfs_strategy: ntfs_readattr failed\n"); 332 bp->b_error = error; 333 } 334 335 memset((char *)bp->b_data + toread, 0, 336 bp->b_bcount - toread); 337 } 338 } else { 339 size_t tmp; 340 u_int32_t towrite; 341 342 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 343 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 344 bp->b_error = error = EFBIG; 345 } else { 346 towrite = MIN(bp->b_bcount, 347 fp->f_size - ntfs_cntob(bp->b_blkno)); 348 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 349 towrite,(u_int32_t)fp->f_size)); 350 351 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 352 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 353 bp->b_data, &tmp, NULL); 354 355 if (error) { 356 printf("ntfs_strategy: ntfs_writeattr fail\n"); 357 bp->b_error = error; 358 } 359 } 360 } 361 biodone(bp); 362 return (error); 363 } 364 365 static int 366 ntfs_write(void *v) 367 { 368 struct vop_write_args /* { 369 struct vnode *a_vp; 370 struct uio *a_uio; 371 int a_ioflag; 372 kauth_cred_t a_cred; 373 } */ *ap = v; 374 struct vnode *vp = ap->a_vp; 375 struct fnode *fp = VTOF(vp); 376 struct ntnode *ip = FTONT(fp); 377 struct uio *uio = ap->a_uio; 378 struct ntfsmount *ntmp = ip->i_mp; 379 u_int64_t towrite; 380 size_t written; 381 int error; 382 383 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 384 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 385 (long long)uio->uio_resid)); 386 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 387 388 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 389 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 390 return (EFBIG); 391 } 392 393 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 394 395 dprintf((", towrite: %qu\n",(long long)towrite)); 396 397 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 398 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 399 #ifdef NTFS_DEBUG 400 if (error) 401 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 402 #endif 403 404 return (error); 405 } 406 407 static int 408 ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode) 409 { 410 411 /* 412 * Disallow write attempts on read-only file systems; 413 * unless the file is a socket, fifo, or a block or 414 * character device resident on the file system. 415 */ 416 if (mode & VWRITE) { 417 switch ((int)vp->v_type) { 418 case VDIR: 419 case VLNK: 420 case VREG: 421 if (vp->v_mount->mnt_flag & MNT_RDONLY) 422 return (EROFS); 423 break; 424 } 425 } 426 427 return 0; 428 } 429 430 static int 431 ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode, 432 kauth_cred_t cred) 433 { 434 mode_t file_mode; 435 436 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); 437 438 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, 439 file_mode), vp, NULL, genfs_can_access(vp->v_type, file_mode, 440 ip->i_mp->ntm_uid, ip->i_mp->ntm_gid, mode, cred)); 441 } 442 443 int 444 ntfs_access(void *v) 445 { 446 struct vop_access_args /* { 447 struct vnode *a_vp; 448 int a_mode; 449 kauth_cred_t a_cred; 450 } */ *ap = v; 451 struct vnode *vp = ap->a_vp; 452 struct ntnode *ip = VTONT(vp); 453 int error; 454 455 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 456 457 error = ntfs_check_possible(vp, ip, ap->a_mode); 458 if (error) 459 return error; 460 461 error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred); 462 463 return error; 464 } 465 466 /* 467 * Open called. 468 * 469 * Nothing to do. 470 */ 471 /* ARGSUSED */ 472 static int 473 ntfs_open(void *v) 474 { 475 struct vop_open_args /* { 476 struct vnode *a_vp; 477 int a_mode; 478 kauth_cred_t a_cred; 479 } */ *ap __unused = v; 480 #ifdef NTFS_DEBUG 481 struct vnode *vp = ap->a_vp; 482 struct ntnode *ip = VTONT(vp); 483 484 dprintf(("ntfs_open: %llu\n", (unsigned long long)ip->i_number)); 485 #endif 486 487 /* 488 * Files marked append-only must be opened for appending. 489 */ 490 491 return (0); 492 } 493 494 /* 495 * Close called. 496 * 497 * Update the times on the inode. 498 */ 499 /* ARGSUSED */ 500 static int 501 ntfs_close(void *v) 502 { 503 struct vop_close_args /* { 504 struct vnode *a_vp; 505 int a_fflag; 506 kauth_cred_t a_cred; 507 } */ *ap __unused = v; 508 #ifdef NTFS_DEBUG 509 struct vnode *vp = ap->a_vp; 510 struct ntnode *ip = VTONT(vp); 511 512 dprintf(("ntfs_close: %llu\n", (unsigned long long)ip->i_number)); 513 #endif 514 515 return (0); 516 } 517 518 int 519 ntfs_readdir(void *v) 520 { 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_ncookies; 526 u_int **cookies; 527 } */ *ap = v; 528 struct vnode *vp = ap->a_vp; 529 struct fnode *fp = VTOF(vp); 530 struct ntnode *ip = FTONT(fp); 531 struct uio *uio = ap->a_uio; 532 struct ntfsmount *ntmp = ip->i_mp; 533 int i, error = 0; 534 u_int32_t faked = 0, num; 535 int ncookies = 0; 536 struct dirent *cde; 537 off_t off; 538 539 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 540 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 541 (long long)uio->uio_resid)); 542 543 off = uio->uio_offset; 544 545 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); 546 547 /* Simulate . in every dir except ROOT */ 548 if (ip->i_number != NTFS_ROOTINO 549 && uio->uio_offset < sizeof(struct dirent)) { 550 cde->d_fileno = ip->i_number; 551 cde->d_reclen = sizeof(struct dirent); 552 cde->d_type = DT_DIR; 553 cde->d_namlen = 1; 554 strncpy(cde->d_name, ".", 2); 555 error = uiomove((void *)cde, sizeof(struct dirent), uio); 556 if (error) 557 goto out; 558 559 ncookies++; 560 } 561 562 /* Simulate .. in every dir including ROOT */ 563 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 564 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 565 cde->d_reclen = sizeof(struct dirent); 566 cde->d_type = DT_DIR; 567 cde->d_namlen = 2; 568 strncpy(cde->d_name, "..", 3); 569 570 error = uiomove((void *) cde, sizeof(struct dirent), uio); 571 if (error) 572 goto out; 573 574 ncookies++; 575 } 576 577 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 578 num = uio->uio_offset / sizeof(struct dirent) - faked; 579 580 while (uio->uio_resid >= sizeof(struct dirent)) { 581 struct attr_indexentry *iep; 582 char *fname; 583 size_t remains; 584 int sz; 585 586 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 587 if (error) 588 goto out; 589 590 if (NULL == iep) 591 break; 592 593 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 594 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 595 { 596 if(!ntfs_isnamepermitted(ntmp,iep)) 597 continue; 598 599 remains = sizeof(cde->d_name) - 1; 600 fname = cde->d_name; 601 for(i=0; i<iep->ie_fnamelen; i++) { 602 sz = (*ntmp->ntm_wput)(fname, remains, 603 iep->ie_fname[i]); 604 fname += sz; 605 remains -= sz; 606 } 607 *fname = '\0'; 608 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 609 num, cde->d_name, iep->ie_fnametype, 610 iep->ie_flag)); 611 cde->d_namlen = fname - (char *) cde->d_name; 612 cde->d_fileno = iep->ie_number; 613 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 614 cde->d_reclen = sizeof(struct dirent); 615 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 616 617 error = uiomove((void *)cde, sizeof(struct dirent), uio); 618 if (error) 619 goto out; 620 621 ncookies++; 622 num++; 623 } 624 } 625 626 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 627 ncookies,(u_int)(uio->uio_offset - off))); 628 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 629 (long long)uio->uio_offset,(long long)uio->uio_resid)); 630 631 if (!error && ap->a_ncookies != NULL) { 632 struct dirent* dpStart; 633 struct dirent* dp; 634 off_t *cookies; 635 off_t *cookiep; 636 637 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 638 dpStart = (struct dirent *) 639 ((char *)uio->uio_iov->iov_base - 640 (uio->uio_offset - off)); 641 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 642 for (dp = dpStart, cookiep = cookies, i=0; 643 i < ncookies; 644 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 645 off += dp->d_reclen; 646 *cookiep++ = (u_int) off; 647 } 648 *ap->a_ncookies = ncookies; 649 *ap->a_cookies = cookies; 650 } 651 /* 652 if (ap->a_eofflag) 653 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 654 */ 655 out: 656 free(cde, M_TEMP); 657 return (error); 658 } 659 660 int 661 ntfs_lookup(void *v) 662 { 663 struct vop_lookup_v2_args /* { 664 struct vnode *a_dvp; 665 struct vnode **a_vpp; 666 struct componentname *a_cnp; 667 } */ *ap = v; 668 struct vnode *dvp = ap->a_dvp; 669 struct ntnode *dip = VTONT(dvp); 670 struct ntfsmount *ntmp = dip->i_mp; 671 struct componentname *cnp = ap->a_cnp; 672 kauth_cred_t cred = cnp->cn_cred; 673 int error; 674 675 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 676 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 677 (unsigned long long)dip->i_number)); 678 679 error = VOP_ACCESS(dvp, VEXEC, cred); 680 if(error) 681 return (error); 682 683 if ((cnp->cn_flags & ISLASTCN) && 684 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 685 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 686 return (EROFS); 687 688 /* 689 * We now have a segment name to search for, and a directory 690 * to search. 691 * 692 * Before tediously performing a linear scan of the directory, 693 * check the name cache to see if the directory/name pair 694 * we are looking for is known already. 695 */ 696 if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen, 697 cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) { 698 return *ap->a_vpp == NULLVP ? ENOENT : 0; 699 } 700 701 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 702 dprintf(("ntfs_lookup: faking . directory in %llu\n", 703 (unsigned long long)dip->i_number)); 704 705 vref(dvp); 706 *ap->a_vpp = dvp; 707 error = 0; 708 } else if (cnp->cn_flags & ISDOTDOT) { 709 struct ntvattr *vap; 710 711 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 712 (unsigned long long)dip->i_number)); 713 714 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 715 if (error) { 716 return (error); 717 } 718 719 dprintf(("ntfs_lookup: parentdir: %d\n", 720 vap->va_a_name->n_pnumber)); 721 error = ntfs_vgetex(ntmp->ntm_mountp, 722 vap->va_a_name->n_pnumber, 723 NTFS_A_DATA, "", 0, ap->a_vpp); 724 ntfs_ntvattrrele(vap); 725 if (error) { 726 return (error); 727 } 728 } else { 729 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 730 if (error) { 731 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 732 return (error); 733 } 734 735 dprintf(("ntfs_lookup: found ino: %llu\n", 736 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 737 } 738 739 cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen, 740 cnp->cn_flags); 741 742 return error; 743 } 744 745 /* 746 * Flush the blocks of a file to disk. 747 * 748 * This function is worthless for vnodes that represent directories. Maybe we 749 * could just do a sync if they try an fsync on a directory file. 750 */ 751 static int 752 ntfs_fsync(void *v) 753 { 754 struct vop_fsync_args /* { 755 struct vnode *a_vp; 756 kauth_cred_t a_cred; 757 int a_flags; 758 off_t offlo; 759 off_t offhi; 760 } */ *ap = v; 761 struct vnode *vp = ap->a_vp; 762 763 if (ap->a_flags & FSYNC_CACHE) { 764 return EOPNOTSUPP; 765 } 766 767 return vflushbuf(vp, ap->a_flags); 768 } 769 770 /* 771 * Return POSIX pathconf information applicable to NTFS filesystem 772 */ 773 static int 774 ntfs_pathconf(void *v) 775 { 776 struct vop_pathconf_args /* { 777 struct vnode *a_vp; 778 int a_name; 779 register_t *a_retval; 780 } */ *ap = v; 781 782 switch (ap->a_name) { 783 case _PC_LINK_MAX: 784 *ap->a_retval = 1; 785 return (0); 786 case _PC_NAME_MAX: 787 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 788 return (0); 789 case _PC_PATH_MAX: 790 *ap->a_retval = PATH_MAX; 791 return (0); 792 case _PC_CHOWN_RESTRICTED: 793 *ap->a_retval = 1; 794 return (0); 795 case _PC_NO_TRUNC: 796 *ap->a_retval = 0; 797 return (0); 798 case _PC_SYNC_IO: 799 *ap->a_retval = 1; 800 return (0); 801 case _PC_FILESIZEBITS: 802 *ap->a_retval = 64; 803 return (0); 804 default: 805 return (EINVAL); 806 } 807 /* NOTREACHED */ 808 } 809 810 /* 811 * Global vfs data structures 812 */ 813 vop_t **ntfs_vnodeop_p; 814 815 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 816 { &vop_default_desc, (vop_t *) ntfs_bypass }, 817 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 818 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 819 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 820 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 821 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 822 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 823 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 824 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 825 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 826 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 827 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 828 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 829 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 830 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 831 { &vop_poll_desc, genfs_poll }, /* poll */ 832 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 833 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 834 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 835 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 836 { &vop_seek_desc, genfs_seek }, /* seek */ 837 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 838 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 839 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 840 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 841 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 842 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 843 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 844 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 845 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 846 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 847 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 848 { &vop_lock_desc, genfs_lock }, /* lock */ 849 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 850 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 851 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 852 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 853 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 854 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 855 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 856 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 857 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 858 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 859 { NULL, NULL } 860 }; 861 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 862 { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; 863