1 /* $NetBSD: ntfs_vnops.c,v 1.49 2011/05/19 03:11:57 rmind 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 1.49 2011/05/19 03:11:57 rmind 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 <miscfs/specfs/specdev.h> 60 #include <miscfs/genfs/genfs.h> 61 62 #include <sys/unistd.h> /* for pathconf(2) constants */ 63 64 static int ntfs_bypass(void *); 65 static int ntfs_read(void *); 66 static int ntfs_write(void *); 67 static int ntfs_getattr(void *); 68 static int ntfs_inactive(void *); 69 static int ntfs_print(void *); 70 static int ntfs_reclaim(void *); 71 static int ntfs_strategy(void *); 72 static int ntfs_access(void *); 73 static int ntfs_open(void *); 74 static int ntfs_close(void *); 75 static int ntfs_readdir(void *); 76 static int ntfs_lookup(void *); 77 static int ntfs_bmap(void *); 78 static int ntfs_fsync(void *); 79 static int ntfs_pathconf(void *); 80 81 extern int prtactive; 82 83 /* 84 * This is a noop, simply returning what one has been given. 85 */ 86 int 87 ntfs_bmap(void *v) 88 { 89 struct vop_bmap_args /* { 90 struct vnode *a_vp; 91 daddr_t a_bn; 92 struct vnode **a_vpp; 93 daddr_t *a_bnp; 94 int *a_runp; 95 int *a_runb; 96 } */ *ap = v; 97 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 98 if (ap->a_vpp != NULL) 99 *ap->a_vpp = ap->a_vp; 100 if (ap->a_bnp != NULL) 101 *ap->a_bnp = ap->a_bn; 102 if (ap->a_runp != NULL) 103 *ap->a_runp = 0; 104 return (0); 105 } 106 107 static int 108 ntfs_read(void *v) 109 { 110 struct vop_read_args /* { 111 struct vnode *a_vp; 112 struct uio *a_uio; 113 int a_ioflag; 114 kauth_cred_t a_cred; 115 } */ *ap = v; 116 struct vnode *vp = ap->a_vp; 117 struct fnode *fp = VTOF(vp); 118 struct ntnode *ip = FTONT(fp); 119 struct uio *uio = ap->a_uio; 120 struct ntfsmount *ntmp = ip->i_mp; 121 u_int64_t toread; 122 int error; 123 124 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n", 125 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 126 (long long)uio->uio_resid)); 127 128 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size)); 129 130 /* don't allow reading after end of file */ 131 if (uio->uio_offset > fp->f_size) 132 toread = 0; 133 else 134 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); 135 136 dprintf((", toread: %qu\n",(long long)toread)); 137 138 if (toread == 0) 139 return (0); 140 141 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 142 fp->f_attrname, uio->uio_offset, toread, NULL, uio); 143 if (error) { 144 printf("ntfs_read: ntfs_readattr failed: %d\n",error); 145 return (error); 146 } 147 148 return (0); 149 } 150 151 static int 152 ntfs_bypass(void *v) 153 { 154 struct vop_generic_args /* { 155 struct vnodeop_desc *a_desc; 156 <other random data follows, presumably> 157 } */ *ap __unused = v; 158 int error = ENOTTY; 159 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name)); 160 return (error); 161 } 162 163 164 static int 165 ntfs_getattr(void *v) 166 { 167 struct vop_getattr_args /* { 168 struct vnode *a_vp; 169 struct vattr *a_vap; 170 kauth_cred_t a_cred; 171 } */ *ap = v; 172 struct vnode *vp = ap->a_vp; 173 struct fnode *fp = VTOF(vp); 174 struct ntnode *ip = FTONT(fp); 175 struct vattr *vap = ap->a_vap; 176 177 dprintf(("ntfs_getattr: %llu, flags: %d\n", 178 (unsigned long long)ip->i_number, ip->i_flag)); 179 180 vap->va_fsid = ip->i_dev; 181 vap->va_fileid = ip->i_number; 182 vap->va_mode = ip->i_mp->ntm_mode; 183 vap->va_nlink = ip->i_nlink; 184 vap->va_uid = ip->i_mp->ntm_uid; 185 vap->va_gid = ip->i_mp->ntm_gid; 186 vap->va_rdev = 0; /* XXX UNODEV ? */ 187 vap->va_size = fp->f_size; 188 vap->va_bytes = fp->f_allocated; 189 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 190 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 191 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 192 vap->va_flags = ip->i_flag; 193 vap->va_gen = 0; 194 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 195 vap->va_type = vp->v_type; 196 vap->va_filerev = 0; 197 return (0); 198 } 199 200 201 /* 202 * Last reference to an ntnode. If necessary, write or delete it. 203 */ 204 int 205 ntfs_inactive(void *v) 206 { 207 struct vop_inactive_args /* { 208 struct vnode *a_vp; 209 } */ *ap = v; 210 struct vnode *vp = ap->a_vp; 211 #ifdef NTFS_DEBUG 212 struct ntnode *ip = VTONT(vp); 213 #endif 214 215 dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n", vp, 216 (unsigned long long)ip->i_number)); 217 218 VOP_UNLOCK(vp); 219 220 /* XXX since we don't support any filesystem changes 221 * right now, nothing more needs to be done 222 */ 223 return (0); 224 } 225 226 /* 227 * Reclaim an fnode/ntnode so that it can be used for other purposes. 228 */ 229 int 230 ntfs_reclaim(void *v) 231 { 232 struct vop_reclaim_args /* { 233 struct vnode *a_vp; 234 } */ *ap = v; 235 struct vnode *vp = ap->a_vp; 236 struct fnode *fp = VTOF(vp); 237 struct ntnode *ip = FTONT(fp); 238 int error; 239 240 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp, 241 (unsigned long long)ip->i_number)); 242 243 if (prtactive && vp->v_usecount > 1) 244 vprint("ntfs_reclaim: pushing active", vp); 245 246 if ((error = ntfs_ntget(ip)) != 0) 247 return (error); 248 249 if (ip->i_devvp) { 250 vrele(ip->i_devvp); 251 ip->i_devvp = NULL; 252 } 253 254 genfs_node_destroy(vp); 255 ntfs_frele(fp); 256 ntfs_ntput(ip); 257 vp->v_data = NULL; 258 259 return (0); 260 } 261 262 static int 263 ntfs_print(void *v) 264 { 265 struct vop_print_args /* { 266 struct vnode *a_vp; 267 } */ *ap = v; 268 struct ntnode *ip = VTONT(ap->a_vp); 269 270 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 271 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 272 ip->i_nlink); 273 printf(" "); 274 printf("\n"); 275 return (0); 276 } 277 278 /* 279 * Calculate the logical to physical mapping if not done already, 280 * then call the device strategy routine. 281 */ 282 int 283 ntfs_strategy(void *v) 284 { 285 struct vop_strategy_args /* { 286 struct vnode *a_vp; 287 struct buf *a_bp; 288 } */ *ap = v; 289 struct buf *bp = ap->a_bp; 290 struct vnode *vp = ap->a_vp; 291 struct fnode *fp = VTOF(vp); 292 struct ntnode *ip = FTONT(fp); 293 struct ntfsmount *ntmp = ip->i_mp; 294 int error; 295 296 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 297 (u_int32_t)bp->b_blkno, 298 (u_int32_t)bp->b_lblkno)); 299 300 dprintf(("strategy: bcount: %u flags: 0x%x\n", 301 (u_int32_t)bp->b_bcount,bp->b_flags)); 302 303 if (bp->b_flags & B_READ) { 304 u_int32_t toread; 305 306 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 307 clrbuf(bp); 308 error = 0; 309 } else { 310 toread = MIN(bp->b_bcount, 311 fp->f_size - ntfs_cntob(bp->b_blkno)); 312 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 313 toread,(u_int32_t)fp->f_size)); 314 315 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 316 fp->f_attrname, ntfs_cntob(bp->b_blkno), 317 toread, bp->b_data, NULL); 318 319 if (error) { 320 printf("ntfs_strategy: ntfs_readattr failed\n"); 321 bp->b_error = error; 322 } 323 324 memset((char *)bp->b_data + toread, 0, 325 bp->b_bcount - toread); 326 } 327 } else { 328 size_t tmp; 329 u_int32_t towrite; 330 331 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 332 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 333 bp->b_error = error = EFBIG; 334 } else { 335 towrite = MIN(bp->b_bcount, 336 fp->f_size - ntfs_cntob(bp->b_blkno)); 337 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 338 towrite,(u_int32_t)fp->f_size)); 339 340 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 341 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 342 bp->b_data, &tmp, NULL); 343 344 if (error) { 345 printf("ntfs_strategy: ntfs_writeattr fail\n"); 346 bp->b_error = error; 347 } 348 } 349 } 350 biodone(bp); 351 return (error); 352 } 353 354 static int 355 ntfs_write(void *v) 356 { 357 struct vop_write_args /* { 358 struct vnode *a_vp; 359 struct uio *a_uio; 360 int a_ioflag; 361 kauth_cred_t a_cred; 362 } */ *ap = v; 363 struct vnode *vp = ap->a_vp; 364 struct fnode *fp = VTOF(vp); 365 struct ntnode *ip = FTONT(fp); 366 struct uio *uio = ap->a_uio; 367 struct ntfsmount *ntmp = ip->i_mp; 368 u_int64_t towrite; 369 size_t written; 370 int error; 371 372 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 373 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 374 (long long)uio->uio_resid)); 375 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 376 377 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 378 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 379 return (EFBIG); 380 } 381 382 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 383 384 dprintf((", towrite: %qu\n",(long long)towrite)); 385 386 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 387 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 388 #ifdef NTFS_DEBUG 389 if (error) 390 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 391 #endif 392 393 return (error); 394 } 395 396 static int 397 ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode) 398 { 399 400 /* 401 * Disallow write attempts on read-only file systems; 402 * unless the file is a socket, fifo, or a block or 403 * character device resident on the file system. 404 */ 405 if (mode & VWRITE) { 406 switch ((int)vp->v_type) { 407 case VDIR: 408 case VLNK: 409 case VREG: 410 if (vp->v_mount->mnt_flag & MNT_RDONLY) 411 return (EROFS); 412 break; 413 } 414 } 415 416 return 0; 417 } 418 419 static int 420 ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode, 421 kauth_cred_t cred) 422 { 423 mode_t file_mode; 424 425 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); 426 427 return genfs_can_access(vp->v_type, file_mode, ip->i_mp->ntm_uid, 428 ip->i_mp->ntm_gid, mode, cred); 429 } 430 431 int 432 ntfs_access(void *v) 433 { 434 struct vop_access_args /* { 435 struct vnode *a_vp; 436 int a_mode; 437 kauth_cred_t a_cred; 438 } */ *ap = v; 439 struct vnode *vp = ap->a_vp; 440 struct ntnode *ip = VTONT(vp); 441 int error; 442 443 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 444 445 error = ntfs_check_possible(vp, ip, ap->a_mode); 446 if (error) 447 return error; 448 449 error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred); 450 451 return error; 452 } 453 454 /* 455 * Open called. 456 * 457 * Nothing to do. 458 */ 459 /* ARGSUSED */ 460 static int 461 ntfs_open(void *v) 462 { 463 struct vop_open_args /* { 464 struct vnode *a_vp; 465 int a_mode; 466 kauth_cred_t a_cred; 467 } */ *ap __unused = v; 468 #ifdef NTFS_DEBUG 469 struct vnode *vp = ap->a_vp; 470 struct ntnode *ip = VTONT(vp); 471 472 printf("ntfs_open: %llu\n", (unsigned long long)ip->i_number); 473 #endif 474 475 /* 476 * Files marked append-only must be opened for appending. 477 */ 478 479 return (0); 480 } 481 482 /* 483 * Close called. 484 * 485 * Update the times on the inode. 486 */ 487 /* ARGSUSED */ 488 static int 489 ntfs_close(void *v) 490 { 491 struct vop_close_args /* { 492 struct vnode *a_vp; 493 int a_fflag; 494 kauth_cred_t a_cred; 495 } */ *ap __unused = v; 496 #ifdef NTFS_DEBUG 497 struct vnode *vp = ap->a_vp; 498 struct ntnode *ip = VTONT(vp); 499 500 printf("ntfs_close: %llu\n", (unsigned long long)ip->i_number); 501 #endif 502 503 return (0); 504 } 505 506 int 507 ntfs_readdir(void *v) 508 { 509 struct vop_readdir_args /* { 510 struct vnode *a_vp; 511 struct uio *a_uio; 512 kauth_cred_t a_cred; 513 int *a_ncookies; 514 u_int **cookies; 515 } */ *ap = v; 516 struct vnode *vp = ap->a_vp; 517 struct fnode *fp = VTOF(vp); 518 struct ntnode *ip = FTONT(fp); 519 struct uio *uio = ap->a_uio; 520 struct ntfsmount *ntmp = ip->i_mp; 521 int i, error = 0; 522 u_int32_t faked = 0, num; 523 int ncookies = 0; 524 struct dirent *cde; 525 off_t off; 526 527 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 528 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 529 (long long)uio->uio_resid)); 530 531 off = uio->uio_offset; 532 533 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); 534 535 /* Simulate . in every dir except ROOT */ 536 if (ip->i_number != NTFS_ROOTINO 537 && uio->uio_offset < sizeof(struct dirent)) { 538 cde->d_fileno = ip->i_number; 539 cde->d_reclen = sizeof(struct dirent); 540 cde->d_type = DT_DIR; 541 cde->d_namlen = 1; 542 strncpy(cde->d_name, ".", 2); 543 error = uiomove((void *)cde, sizeof(struct dirent), uio); 544 if (error) 545 goto out; 546 547 ncookies++; 548 } 549 550 /* Simulate .. in every dir including ROOT */ 551 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 552 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 553 cde->d_reclen = sizeof(struct dirent); 554 cde->d_type = DT_DIR; 555 cde->d_namlen = 2; 556 strncpy(cde->d_name, "..", 3); 557 558 error = uiomove((void *) cde, sizeof(struct dirent), uio); 559 if (error) 560 goto out; 561 562 ncookies++; 563 } 564 565 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 566 num = uio->uio_offset / sizeof(struct dirent) - faked; 567 568 while (uio->uio_resid >= sizeof(struct dirent)) { 569 struct attr_indexentry *iep; 570 char *fname; 571 size_t remains; 572 int sz; 573 574 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 575 if (error) 576 goto out; 577 578 if (NULL == iep) 579 break; 580 581 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 582 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 583 { 584 if(!ntfs_isnamepermitted(ntmp,iep)) 585 continue; 586 587 remains = sizeof(cde->d_name) - 1; 588 fname = cde->d_name; 589 for(i=0; i<iep->ie_fnamelen; i++) { 590 sz = (*ntmp->ntm_wput)(fname, remains, 591 iep->ie_fname[i]); 592 fname += sz; 593 remains -= sz; 594 } 595 *fname = '\0'; 596 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 597 num, cde->d_name, iep->ie_fnametype, 598 iep->ie_flag)); 599 cde->d_namlen = fname - (char *) cde->d_name; 600 cde->d_fileno = iep->ie_number; 601 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 602 cde->d_reclen = sizeof(struct dirent); 603 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 604 605 error = uiomove((void *)cde, sizeof(struct dirent), uio); 606 if (error) 607 goto out; 608 609 ncookies++; 610 num++; 611 } 612 } 613 614 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 615 ncookies,(u_int)(uio->uio_offset - off))); 616 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 617 (long long)uio->uio_offset,(long long)uio->uio_resid)); 618 619 if (!error && ap->a_ncookies != NULL) { 620 struct dirent* dpStart; 621 struct dirent* dp; 622 off_t *cookies; 623 off_t *cookiep; 624 625 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 626 dpStart = (struct dirent *) 627 ((char *)uio->uio_iov->iov_base - 628 (uio->uio_offset - off)); 629 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 630 for (dp = dpStart, cookiep = cookies, i=0; 631 i < ncookies; 632 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 633 off += dp->d_reclen; 634 *cookiep++ = (u_int) off; 635 } 636 *ap->a_ncookies = ncookies; 637 *ap->a_cookies = cookies; 638 } 639 /* 640 if (ap->a_eofflag) 641 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 642 */ 643 out: 644 free(cde, M_TEMP); 645 return (error); 646 } 647 648 int 649 ntfs_lookup(void *v) 650 { 651 struct vop_lookup_args /* { 652 struct vnode *a_dvp; 653 struct vnode **a_vpp; 654 struct componentname *a_cnp; 655 } */ *ap = v; 656 struct vnode *dvp = ap->a_dvp; 657 struct ntnode *dip = VTONT(dvp); 658 struct ntfsmount *ntmp = dip->i_mp; 659 struct componentname *cnp = ap->a_cnp; 660 kauth_cred_t cred = cnp->cn_cred; 661 int error; 662 663 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 664 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 665 (unsigned long long)dip->i_number)); 666 667 error = VOP_ACCESS(dvp, VEXEC, cred); 668 if(error) 669 return (error); 670 671 if ((cnp->cn_flags & ISLASTCN) && 672 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 673 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 674 return (EROFS); 675 676 /* 677 * We now have a segment name to search for, and a directory 678 * to search. 679 * 680 * Before tediously performing a linear scan of the directory, 681 * check the name cache to see if the directory/name pair 682 * we are looking for is known already. 683 */ 684 if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0) 685 return (error); 686 687 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 688 dprintf(("ntfs_lookup: faking . directory in %llu\n", 689 (unsigned long long)dip->i_number)); 690 691 vref(dvp); 692 *ap->a_vpp = dvp; 693 error = 0; 694 } else if (cnp->cn_flags & ISDOTDOT) { 695 struct ntvattr *vap; 696 697 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 698 (unsigned long long)dip->i_number)); 699 700 VOP_UNLOCK(dvp); 701 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 702 if (error) { 703 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 704 return (error); 705 } 706 707 dprintf(("ntfs_lookup: parentdir: %d\n", 708 vap->va_a_name->n_pnumber)); 709 error = VFS_VGET(ntmp->ntm_mountp, 710 vap->va_a_name->n_pnumber,ap->a_vpp); 711 ntfs_ntvattrrele(vap); 712 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 713 if (error) { 714 return (error); 715 } 716 } else { 717 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 718 if (error) { 719 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 720 return (error); 721 } 722 723 dprintf(("ntfs_lookup: found ino: %llu\n", 724 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 725 } 726 727 if (cnp->cn_flags & MAKEENTRY) 728 cache_enter(dvp, *ap->a_vpp, cnp); 729 730 return (error); 731 } 732 733 /* 734 * Flush the blocks of a file to disk. 735 * 736 * This function is worthless for vnodes that represent directories. Maybe we 737 * could just do a sync if they try an fsync on a directory file. 738 */ 739 static int 740 ntfs_fsync(void *v) 741 { 742 struct vop_fsync_args /* { 743 struct vnode *a_vp; 744 kauth_cred_t a_cred; 745 int a_flags; 746 off_t offlo; 747 off_t offhi; 748 } */ *ap = v; 749 struct vnode *vp = ap->a_vp; 750 int wait; 751 752 if (ap->a_flags & FSYNC_CACHE) { 753 return EOPNOTSUPP; 754 } 755 756 wait = (ap->a_flags & FSYNC_WAIT) != 0; 757 return vflushbuf(vp, wait); 758 } 759 760 /* 761 * Return POSIX pathconf information applicable to NTFS filesystem 762 */ 763 static int 764 ntfs_pathconf(void *v) 765 { 766 struct vop_pathconf_args /* { 767 struct vnode *a_vp; 768 int a_name; 769 register_t *a_retval; 770 } */ *ap = v; 771 772 switch (ap->a_name) { 773 case _PC_LINK_MAX: 774 *ap->a_retval = 1; 775 return (0); 776 case _PC_NAME_MAX: 777 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 778 return (0); 779 case _PC_PATH_MAX: 780 *ap->a_retval = PATH_MAX; 781 return (0); 782 case _PC_CHOWN_RESTRICTED: 783 *ap->a_retval = 1; 784 return (0); 785 case _PC_NO_TRUNC: 786 *ap->a_retval = 0; 787 return (0); 788 case _PC_SYNC_IO: 789 *ap->a_retval = 1; 790 return (0); 791 case _PC_FILESIZEBITS: 792 *ap->a_retval = 64; 793 return (0); 794 default: 795 return (EINVAL); 796 } 797 /* NOTREACHED */ 798 } 799 800 /* 801 * Global vfs data structures 802 */ 803 vop_t **ntfs_vnodeop_p; 804 805 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 806 { &vop_default_desc, (vop_t *) ntfs_bypass }, 807 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 808 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 809 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 810 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 811 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 812 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 813 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 814 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 815 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 816 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 817 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 818 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 819 { &vop_poll_desc, genfs_poll }, /* poll */ 820 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 821 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 822 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 823 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 824 { &vop_seek_desc, genfs_seek }, /* seek */ 825 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 826 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 827 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 828 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 829 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 830 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 831 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 832 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 833 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 834 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 835 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 836 { &vop_lock_desc, genfs_lock }, /* lock */ 837 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 838 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 839 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 840 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 841 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 842 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 843 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 844 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 845 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 846 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 847 { NULL, NULL } 848 }; 849 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 850 { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; 851