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sys/fs/ntfs/ntfs_vnops.c
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1 /* $NetBSD: ntfs_vnops.c,v 1.41 2008/04/30 14:07:14 ad 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 1.41 2008/04/30 14:07:14 ad 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, 0); 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 /* Purge old data structures associated with the inode. */ 250 cache_purge(vp); 251 if (ip->i_devvp) { 252 vrele(ip->i_devvp); 253 ip->i_devvp = NULL; 254 } 255 256 genfs_node_destroy(vp); 257 ntfs_frele(fp); 258 ntfs_ntput(ip); 259 vp->v_data = NULL; 260 261 return (0); 262 } 263 264 static int 265 ntfs_print(void *v) 266 { 267 struct vop_print_args /* { 268 struct vnode *a_vp; 269 } */ *ap = v; 270 struct ntnode *ip = VTONT(ap->a_vp); 271 272 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 273 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 274 ip->i_nlink); 275 printf(" "); 276 printf("\n"); 277 return (0); 278 } 279 280 /* 281 * Calculate the logical to physical mapping if not done already, 282 * then call the device strategy routine. 283 */ 284 int 285 ntfs_strategy(void *v) 286 { 287 struct vop_strategy_args /* { 288 struct vnode *a_vp; 289 struct buf *a_bp; 290 } */ *ap = v; 291 struct buf *bp = ap->a_bp; 292 struct vnode *vp = ap->a_vp; 293 struct fnode *fp = VTOF(vp); 294 struct ntnode *ip = FTONT(fp); 295 struct ntfsmount *ntmp = ip->i_mp; 296 int error; 297 298 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 299 (u_int32_t)bp->b_blkno, 300 (u_int32_t)bp->b_lblkno)); 301 302 dprintf(("strategy: bcount: %u flags: 0x%x\n", 303 (u_int32_t)bp->b_bcount,bp->b_flags)); 304 305 if (bp->b_flags & B_READ) { 306 u_int32_t toread; 307 308 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 309 clrbuf(bp); 310 error = 0; 311 } else { 312 toread = MIN(bp->b_bcount, 313 fp->f_size - ntfs_cntob(bp->b_blkno)); 314 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 315 toread,(u_int32_t)fp->f_size)); 316 317 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 318 fp->f_attrname, ntfs_cntob(bp->b_blkno), 319 toread, bp->b_data, NULL); 320 321 if (error) { 322 printf("ntfs_strategy: ntfs_readattr failed\n"); 323 bp->b_error = error; 324 } 325 326 memset((char *)bp->b_data + toread, 0, 327 bp->b_bcount - toread); 328 } 329 } else { 330 size_t tmp; 331 u_int32_t towrite; 332 333 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 334 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 335 bp->b_error = error = EFBIG; 336 } else { 337 towrite = MIN(bp->b_bcount, 338 fp->f_size - ntfs_cntob(bp->b_blkno)); 339 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 340 towrite,(u_int32_t)fp->f_size)); 341 342 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 343 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 344 bp->b_data, &tmp, NULL); 345 346 if (error) { 347 printf("ntfs_strategy: ntfs_writeattr fail\n"); 348 bp->b_error = error; 349 } 350 } 351 } 352 biodone(bp); 353 return (error); 354 } 355 356 static int 357 ntfs_write(void *v) 358 { 359 struct vop_write_args /* { 360 struct vnode *a_vp; 361 struct uio *a_uio; 362 int a_ioflag; 363 kauth_cred_t a_cred; 364 } */ *ap = v; 365 struct vnode *vp = ap->a_vp; 366 struct fnode *fp = VTOF(vp); 367 struct ntnode *ip = FTONT(fp); 368 struct uio *uio = ap->a_uio; 369 struct ntfsmount *ntmp = ip->i_mp; 370 u_int64_t towrite; 371 size_t written; 372 int error; 373 374 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 375 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 376 (long long)uio->uio_resid)); 377 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 378 379 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 380 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 381 return (EFBIG); 382 } 383 384 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 385 386 dprintf((", towrite: %qu\n",(long long)towrite)); 387 388 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 389 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 390 #ifdef NTFS_DEBUG 391 if (error) 392 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 393 #endif 394 395 return (error); 396 } 397 398 int 399 ntfs_access(void *v) 400 { 401 struct vop_access_args /* { 402 struct vnode *a_vp; 403 int a_mode; 404 kauth_cred_t a_cred; 405 } */ *ap = v; 406 struct vnode *vp = ap->a_vp; 407 struct ntnode *ip = VTONT(vp); 408 kauth_cred_t cred = ap->a_cred; 409 mode_t mask, mode = ap->a_mode; 410 gid_t grp; 411 int i; 412 uint16_t ngroups; 413 414 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 415 416 /* 417 * Disallow write attempts on read-only file systems; 418 * unless the file is a socket, fifo, or a block or 419 * character device resident on the file system. 420 */ 421 if (mode & VWRITE) { 422 switch ((int)vp->v_type) { 423 case VDIR: 424 case VLNK: 425 case VREG: 426 if (vp->v_mount->mnt_flag & MNT_RDONLY) 427 return (EROFS); 428 break; 429 } 430 } 431 432 /* Otherwise, user id 0 always gets access. */ 433 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0) 434 return (0); 435 436 mask = 0; 437 438 /* Otherwise, check the owner. */ 439 if (kauth_cred_geteuid(cred) == ip->i_mp->ntm_uid) { 440 if (mode & VEXEC) 441 mask |= S_IXUSR; 442 if (mode & VREAD) 443 mask |= S_IRUSR; 444 if (mode & VWRITE) 445 mask |= S_IWUSR; 446 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 447 } 448 449 /* Otherwise, check the groups. */ 450 ngroups = kauth_cred_ngroups(cred); 451 for (i = 0; i < ngroups; i++) { 452 grp = kauth_cred_group(cred, i); 453 if (ip->i_mp->ntm_gid == grp) { 454 if (mode & VEXEC) 455 mask |= S_IXGRP; 456 if (mode & VREAD) 457 mask |= S_IRGRP; 458 if (mode & VWRITE) 459 mask |= S_IWGRP; 460 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES); 461 } 462 } 463 464 /* Otherwise, check everyone else. */ 465 if (mode & VEXEC) 466 mask |= S_IXOTH; 467 if (mode & VREAD) 468 mask |= S_IROTH; 469 if (mode & VWRITE) 470 mask |= S_IWOTH; 471 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 472 } 473 474 /* 475 * Open called. 476 * 477 * Nothing to do. 478 */ 479 /* ARGSUSED */ 480 static int 481 ntfs_open(void *v) 482 { 483 struct vop_open_args /* { 484 struct vnode *a_vp; 485 int a_mode; 486 kauth_cred_t a_cred; 487 } */ *ap __unused = v; 488 #ifdef NTFS_DEBUG 489 struct vnode *vp = ap->a_vp; 490 struct ntnode *ip = VTONT(vp); 491 492 printf("ntfs_open: %llu\n", (unsigned long long)ip->i_number); 493 #endif 494 495 /* 496 * Files marked append-only must be opened for appending. 497 */ 498 499 return (0); 500 } 501 502 /* 503 * Close called. 504 * 505 * Update the times on the inode. 506 */ 507 /* ARGSUSED */ 508 static int 509 ntfs_close(void *v) 510 { 511 struct vop_close_args /* { 512 struct vnode *a_vp; 513 int a_fflag; 514 kauth_cred_t a_cred; 515 } */ *ap __unused = v; 516 #ifdef NTFS_DEBUG 517 struct vnode *vp = ap->a_vp; 518 struct ntnode *ip = VTONT(vp); 519 520 printf("ntfs_close: %llu\n", (unsigned long long)ip->i_number); 521 #endif 522 523 return (0); 524 } 525 526 int 527 ntfs_readdir(void *v) 528 { 529 struct vop_readdir_args /* { 530 struct vnode *a_vp; 531 struct uio *a_uio; 532 kauth_cred_t a_cred; 533 int *a_ncookies; 534 u_int **cookies; 535 } */ *ap = v; 536 struct vnode *vp = ap->a_vp; 537 struct fnode *fp = VTOF(vp); 538 struct ntnode *ip = FTONT(fp); 539 struct uio *uio = ap->a_uio; 540 struct ntfsmount *ntmp = ip->i_mp; 541 int i, error = 0; 542 u_int32_t faked = 0, num; 543 int ncookies = 0; 544 struct dirent *cde; 545 off_t off; 546 547 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 548 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 549 (long long)uio->uio_resid)); 550 551 off = uio->uio_offset; 552 553 MALLOC(cde, struct dirent *, sizeof(struct dirent), M_TEMP, M_WAITOK); 554 555 /* Simulate . in every dir except ROOT */ 556 if (ip->i_number != NTFS_ROOTINO 557 && uio->uio_offset < sizeof(struct dirent)) { 558 cde->d_fileno = ip->i_number; 559 cde->d_reclen = sizeof(struct dirent); 560 cde->d_type = DT_DIR; 561 cde->d_namlen = 1; 562 strncpy(cde->d_name, ".", 2); 563 error = uiomove((void *)cde, sizeof(struct dirent), uio); 564 if (error) 565 goto out; 566 567 ncookies++; 568 } 569 570 /* Simulate .. in every dir including ROOT */ 571 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 572 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 573 cde->d_reclen = sizeof(struct dirent); 574 cde->d_type = DT_DIR; 575 cde->d_namlen = 2; 576 strncpy(cde->d_name, "..", 3); 577 578 error = uiomove((void *) cde, sizeof(struct dirent), uio); 579 if (error) 580 goto out; 581 582 ncookies++; 583 } 584 585 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 586 num = uio->uio_offset / sizeof(struct dirent) - faked; 587 588 while (uio->uio_resid >= sizeof(struct dirent)) { 589 struct attr_indexentry *iep; 590 char *fname; 591 size_t remains; 592 int sz; 593 594 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 595 if (error) 596 goto out; 597 598 if (NULL == iep) 599 break; 600 601 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 602 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 603 { 604 if(!ntfs_isnamepermitted(ntmp,iep)) 605 continue; 606 607 remains = sizeof(cde->d_name) - 1; 608 fname = cde->d_name; 609 for(i=0; i<iep->ie_fnamelen; i++) { 610 sz = (*ntmp->ntm_wput)(fname, remains, 611 iep->ie_fname[i]); 612 fname += sz; 613 remains -= sz; 614 } 615 *fname = '\0'; 616 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 617 num, cde->d_name, iep->ie_fnametype, 618 iep->ie_flag)); 619 cde->d_namlen = fname - (char *) cde->d_name; 620 cde->d_fileno = iep->ie_number; 621 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 622 cde->d_reclen = sizeof(struct dirent); 623 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 624 625 error = uiomove((void *)cde, sizeof(struct dirent), uio); 626 if (error) 627 goto out; 628 629 ncookies++; 630 num++; 631 } 632 } 633 634 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 635 ncookies,(u_int)(uio->uio_offset - off))); 636 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 637 (long long)uio->uio_offset,(long long)uio->uio_resid)); 638 639 if (!error && ap->a_ncookies != NULL) { 640 struct dirent* dpStart; 641 struct dirent* dp; 642 off_t *cookies; 643 off_t *cookiep; 644 645 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 646 dpStart = (struct dirent *) 647 ((char *)uio->uio_iov->iov_base - 648 (uio->uio_offset - off)); 649 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 650 for (dp = dpStart, cookiep = cookies, i=0; 651 i < ncookies; 652 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 653 off += dp->d_reclen; 654 *cookiep++ = (u_int) off; 655 } 656 *ap->a_ncookies = ncookies; 657 *ap->a_cookies = cookies; 658 } 659 /* 660 if (ap->a_eofflag) 661 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 662 */ 663 out: 664 FREE(cde, M_TEMP); 665 return (error); 666 } 667 668 int 669 ntfs_lookup(void *v) 670 { 671 struct vop_lookup_args /* { 672 struct vnode *a_dvp; 673 struct vnode **a_vpp; 674 struct componentname *a_cnp; 675 } */ *ap = v; 676 struct vnode *dvp = ap->a_dvp; 677 struct ntnode *dip = VTONT(dvp); 678 struct ntfsmount *ntmp = dip->i_mp; 679 struct componentname *cnp = ap->a_cnp; 680 kauth_cred_t cred = cnp->cn_cred; 681 int error; 682 683 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 684 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 685 (unsigned long long)dip->i_number)); 686 687 error = VOP_ACCESS(dvp, VEXEC, cred); 688 if(error) 689 return (error); 690 691 if ((cnp->cn_flags & ISLASTCN) && 692 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 693 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 694 return (EROFS); 695 696 /* 697 * We now have a segment name to search for, and a directory 698 * to search. 699 * 700 * Before tediously performing a linear scan of the directory, 701 * check the name cache to see if the directory/name pair 702 * we are looking for is known already. 703 */ 704 if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0) 705 return (error); 706 707 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 708 dprintf(("ntfs_lookup: faking . directory in %llu\n", 709 (unsigned long long)dip->i_number)); 710 711 VREF(dvp); 712 *ap->a_vpp = dvp; 713 error = 0; 714 } else if (cnp->cn_flags & ISDOTDOT) { 715 struct ntvattr *vap; 716 717 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 718 (unsigned long long)dip->i_number)); 719 720 VOP_UNLOCK(dvp, 0); 721 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 722 if (error) { 723 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 724 return (error); 725 } 726 727 dprintf(("ntfs_lookup: parentdir: %d\n", 728 vap->va_a_name->n_pnumber)); 729 error = VFS_VGET(ntmp->ntm_mountp, 730 vap->va_a_name->n_pnumber,ap->a_vpp); 731 ntfs_ntvattrrele(vap); 732 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 733 if (error) { 734 return (error); 735 } 736 } else { 737 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 738 if (error) { 739 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 740 return (error); 741 } 742 743 dprintf(("ntfs_lookup: found ino: %llu\n", 744 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 745 } 746 747 if (cnp->cn_flags & MAKEENTRY) 748 cache_enter(dvp, *ap->a_vpp, cnp); 749 750 return (error); 751 } 752 753 /* 754 * Flush the blocks of a file to disk. 755 * 756 * This function is worthless for vnodes that represent directories. Maybe we 757 * could just do a sync if they try an fsync on a directory file. 758 */ 759 static int 760 ntfs_fsync(void *v) 761 { 762 struct vop_fsync_args /* { 763 struct vnode *a_vp; 764 kauth_cred_t a_cred; 765 int a_flags; 766 off_t offlo; 767 off_t offhi; 768 } */ *ap = v; 769 struct vnode *vp = ap->a_vp; 770 int wait; 771 772 if (ap->a_flags & FSYNC_CACHE) { 773 return EOPNOTSUPP; 774 } 775 776 wait = (ap->a_flags & FSYNC_WAIT) != 0; 777 vflushbuf(vp, wait); 778 779 return 0; 780 } 781 782 /* 783 * Return POSIX pathconf information applicable to NTFS filesystem 784 */ 785 static int 786 ntfs_pathconf(void *v) 787 { 788 struct vop_pathconf_args /* { 789 struct vnode *a_vp; 790 int a_name; 791 register_t *a_retval; 792 } */ *ap = v; 793 794 switch (ap->a_name) { 795 case _PC_LINK_MAX: 796 *ap->a_retval = 1; 797 return (0); 798 case _PC_NAME_MAX: 799 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 800 return (0); 801 case _PC_PATH_MAX: 802 *ap->a_retval = PATH_MAX; 803 return (0); 804 case _PC_CHOWN_RESTRICTED: 805 *ap->a_retval = 1; 806 return (0); 807 case _PC_NO_TRUNC: 808 *ap->a_retval = 0; 809 return (0); 810 case _PC_SYNC_IO: 811 *ap->a_retval = 1; 812 return (0); 813 case _PC_FILESIZEBITS: 814 *ap->a_retval = 64; 815 return (0); 816 default: 817 return (EINVAL); 818 } 819 /* NOTREACHED */ 820 } 821 822 /* 823 * Global vfs data structures 824 */ 825 vop_t **ntfs_vnodeop_p; 826 827 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 828 { &vop_default_desc, (vop_t *) ntfs_bypass }, 829 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 830 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 831 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 832 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 833 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 834 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 835 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 836 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 837 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 838 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 839 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 840 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 841 { &vop_poll_desc, genfs_poll }, /* poll */ 842 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 843 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 844 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 845 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 846 { &vop_seek_desc, genfs_seek }, /* seek */ 847 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 848 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 849 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 850 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 851 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 852 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 853 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 854 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 855 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 856 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 857 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 858 { &vop_lock_desc, genfs_lock }, /* lock */ 859 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 860 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 861 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 862 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 863 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 864 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 865 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 866 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 867 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 868 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 869 { NULL, NULL } 870 }; 871 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 872 { &ntfs_vnodeop_p, ntfs_vnodeop_entries };
Cache object: e9f09ef2b7833c08dfbdab14ab41b39d
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