Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/fs/ntfs/ntfs_vnops.c
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1 /* $NetBSD: ntfs_vnops.c,v 1.23 1999/10/31 19:45:27 jdolecek 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 * 4. 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 * $FreeBSD: releng/6.0/sys/fs/ntfs/ntfs_vnops.c 144230 2005-03-28 14:26:01Z jeff $ 35 * 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/time.h> 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/namei.h> 47 #include <sys/malloc.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/dirent.h> 51 52 #include <vm/vm.h> 53 #include <vm/vm_param.h> 54 #include <vm/vm_page.h> 55 #include <vm/vm_object.h> 56 #include <vm/vm_pager.h> 57 #include <vm/vnode_pager.h> 58 #include <vm/vm_extern.h> 59 60 #include <sys/sysctl.h> 61 62 /*#define NTFS_DEBUG 1*/ 63 #include <fs/ntfs/ntfs.h> 64 #include <fs/ntfs/ntfs_inode.h> 65 #include <fs/ntfs/ntfs_subr.h> 66 67 #include <sys/unistd.h> /* for pathconf(2) constants */ 68 69 static vop_read_t ntfs_read; 70 static vop_write_t ntfs_write; 71 static vop_getattr_t ntfs_getattr; 72 static vop_inactive_t ntfs_inactive; 73 static vop_reclaim_t ntfs_reclaim; 74 static vop_bmap_t ntfs_bmap; 75 static vop_strategy_t ntfs_strategy; 76 static vop_access_t ntfs_access; 77 static vop_open_t ntfs_open; 78 static vop_close_t ntfs_close; 79 static vop_readdir_t ntfs_readdir; 80 static vop_cachedlookup_t ntfs_lookup; 81 static vop_fsync_t ntfs_fsync; 82 static vop_pathconf_t ntfs_pathconf; 83 84 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */ 85 86 /* 87 * This is a noop, simply returning what one has been given. 88 */ 89 int 90 ntfs_bmap(ap) 91 struct vop_bmap_args /* { 92 struct vnode *a_vp; 93 daddr_t a_bn; 94 struct bufobj **a_bop; 95 daddr_t *a_bnp; 96 int *a_runp; 97 int *a_runb; 98 } */ *ap; 99 { 100 struct vnode *vp = ap->a_vp; 101 102 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 103 if (ap->a_bop != NULL) 104 *ap->a_bop = &vp->v_bufobj; 105 if (ap->a_bnp != NULL) 106 *ap->a_bnp = ap->a_bn; 107 if (ap->a_runp != NULL) 108 *ap->a_runp = 0; 109 if (ap->a_runb != NULL) 110 *ap->a_runb = 0; 111 return (0); 112 } 113 114 static int 115 ntfs_read(ap) 116 struct vop_read_args /* { 117 struct vnode *a_vp; 118 struct uio *a_uio; 119 int a_ioflag; 120 struct ucred *a_cred; 121 } */ *ap; 122 { 123 register struct vnode *vp = ap->a_vp; 124 register struct fnode *fp = VTOF(vp); 125 register struct ntnode *ip = FTONT(fp); 126 struct uio *uio = ap->a_uio; 127 struct ntfsmount *ntmp = ip->i_mp; 128 struct buf *bp; 129 daddr_t cn; 130 int resid, off, toread; 131 int error; 132 133 dprintf(("ntfs_read: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg)); 134 135 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size)); 136 137 /* don't allow reading after end of file */ 138 if (uio->uio_offset > fp->f_size) 139 return (0); 140 141 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset); 142 143 dprintf((", resid: %d\n", resid)); 144 145 error = 0; 146 while (resid) { 147 cn = ntfs_btocn(uio->uio_offset); 148 off = ntfs_btocnoff(uio->uio_offset); 149 150 toread = min(off + resid, ntfs_cntob(1)); 151 152 error = bread(vp, cn, ntfs_cntob(1), NOCRED, &bp); 153 if (error) { 154 brelse(bp); 155 break; 156 } 157 158 error = uiomove(bp->b_data + off, toread - off, uio); 159 if(error) { 160 brelse(bp); 161 break; 162 } 163 brelse(bp); 164 165 resid -= toread - off; 166 } 167 168 return (error); 169 } 170 171 static int 172 ntfs_getattr(ap) 173 struct vop_getattr_args /* { 174 struct vnode *a_vp; 175 struct vattr *a_vap; 176 struct ucred *a_cred; 177 struct thread *a_td; 178 } */ *ap; 179 { 180 register struct vnode *vp = ap->a_vp; 181 register struct fnode *fp = VTOF(vp); 182 register struct ntnode *ip = FTONT(fp); 183 register struct vattr *vap = ap->a_vap; 184 185 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag)); 186 187 vap->va_fsid = dev2udev(ip->i_dev); 188 vap->va_fileid = ip->i_number; 189 vap->va_mode = ip->i_mp->ntm_mode; 190 vap->va_nlink = ip->i_nlink; 191 vap->va_uid = ip->i_mp->ntm_uid; 192 vap->va_gid = ip->i_mp->ntm_gid; 193 vap->va_rdev = 0; /* XXX UNODEV ? */ 194 vap->va_size = fp->f_size; 195 vap->va_bytes = fp->f_allocated; 196 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 197 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 198 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 199 vap->va_flags = ip->i_flag; 200 vap->va_gen = 0; 201 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 202 vap->va_type = vp->v_type; 203 vap->va_filerev = 0; 204 return (0); 205 } 206 207 /* 208 * Last reference to an ntnode. If necessary, write or delete it. 209 */ 210 int 211 ntfs_inactive(ap) 212 struct vop_inactive_args /* { 213 struct vnode *a_vp; 214 } */ *ap; 215 { 216 register struct vnode *vp = ap->a_vp; 217 #ifdef NTFS_DEBUG 218 register struct ntnode *ip = VTONT(vp); 219 #endif 220 221 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 222 223 if (ntfs_prtactive && vrefcnt(vp) != 0) 224 vprint("ntfs_inactive: pushing active", vp); 225 226 /* XXX since we don't support any filesystem changes 227 * right now, nothing more needs to be done 228 */ 229 return (0); 230 } 231 232 /* 233 * Reclaim an fnode/ntnode so that it can be used for other purposes. 234 */ 235 int 236 ntfs_reclaim(ap) 237 struct vop_reclaim_args /* { 238 struct vnode *a_vp; 239 } */ *ap; 240 { 241 register struct vnode *vp = ap->a_vp; 242 register struct fnode *fp = VTOF(vp); 243 register struct ntnode *ip = FTONT(fp); 244 int error; 245 246 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 247 248 if (ntfs_prtactive && vrefcnt(vp) != 0) 249 vprint("ntfs_reclaim: pushing active", vp); 250 251 if ((error = ntfs_ntget(ip)) != 0) 252 return (error); 253 254 /* Purge old data structures associated with the inode. */ 255 ntfs_frele(fp); 256 ntfs_ntput(ip); 257 vp->v_data = NULL; 258 vnode_destroy_vobject(vp); 259 260 return (0); 261 } 262 263 /* 264 * Calculate the logical to physical mapping if not done already, 265 * then call the device strategy routine. 266 */ 267 int 268 ntfs_strategy(ap) 269 struct vop_strategy_args /* { 270 struct buf *a_bp; 271 } */ *ap; 272 { 273 register struct buf *bp = ap->a_bp; 274 register struct vnode *vp = ap->a_vp; 275 register struct fnode *fp = VTOF(vp); 276 register struct ntnode *ip = FTONT(fp); 277 struct ntfsmount *ntmp = ip->i_mp; 278 int error; 279 280 dprintf(("ntfs_strategy: offset: %d, blkno: %d, lblkno: %d\n", 281 (u_int32_t)bp->b_offset,(u_int32_t)bp->b_blkno, 282 (u_int32_t)bp->b_lblkno)); 283 284 dprintf(("strategy: bcount: %d flags: 0x%lx\n", 285 (u_int32_t)bp->b_bcount,bp->b_flags)); 286 287 if (bp->b_iocmd == BIO_READ) { 288 u_int32_t toread; 289 290 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 291 clrbuf(bp); 292 error = 0; 293 } else { 294 toread = min(bp->b_bcount, 295 fp->f_size-ntfs_cntob(bp->b_blkno)); 296 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 297 toread,(u_int32_t)fp->f_size)); 298 299 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 300 fp->f_attrname, ntfs_cntob(bp->b_blkno), 301 toread, bp->b_data, NULL); 302 303 if (error) { 304 printf("ntfs_strategy: ntfs_readattr failed\n"); 305 bp->b_error = error; 306 bp->b_ioflags |= BIO_ERROR; 307 } 308 309 bzero(bp->b_data + toread, bp->b_bcount - toread); 310 } 311 } else { 312 size_t tmp; 313 u_int32_t towrite; 314 315 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 316 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 317 bp->b_error = error = EFBIG; 318 bp->b_ioflags |= BIO_ERROR; 319 } else { 320 towrite = min(bp->b_bcount, 321 fp->f_size-ntfs_cntob(bp->b_blkno)); 322 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 323 towrite,(u_int32_t)fp->f_size)); 324 325 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 326 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 327 bp->b_data, &tmp, NULL); 328 329 if (error) { 330 printf("ntfs_strategy: ntfs_writeattr fail\n"); 331 bp->b_error = error; 332 bp->b_ioflags |= BIO_ERROR; 333 } 334 } 335 } 336 bufdone(bp); 337 return (error); 338 } 339 340 static int 341 ntfs_write(ap) 342 struct vop_write_args /* { 343 struct vnode *a_vp; 344 struct uio *a_uio; 345 int a_ioflag; 346 struct ucred *a_cred; 347 } */ *ap; 348 { 349 register struct vnode *vp = ap->a_vp; 350 register struct fnode *fp = VTOF(vp); 351 register struct ntnode *ip = FTONT(fp); 352 struct uio *uio = ap->a_uio; 353 struct ntfsmount *ntmp = ip->i_mp; 354 u_int64_t towrite; 355 size_t written; 356 int error; 357 358 dprintf(("ntfs_write: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg)); 359 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size)); 360 361 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 362 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 363 return (EFBIG); 364 } 365 366 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset); 367 368 dprintf((", towrite: %d\n",(u_int32_t)towrite)); 369 370 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 371 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 372 #ifdef NTFS_DEBUG 373 if (error) 374 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 375 #endif 376 377 return (error); 378 } 379 380 int 381 ntfs_access(ap) 382 struct vop_access_args /* { 383 struct vnode *a_vp; 384 int a_mode; 385 struct ucred *a_cred; 386 struct thread *a_td; 387 } */ *ap; 388 { 389 struct vnode *vp = ap->a_vp; 390 struct ntnode *ip = VTONT(vp); 391 mode_t mode = ap->a_mode; 392 #ifdef QUOTA 393 int error; 394 #endif 395 396 dprintf(("ntfs_access: %d\n",ip->i_number)); 397 398 /* 399 * Disallow write attempts on read-only filesystems; 400 * unless the file is a socket, fifo, or a block or 401 * character device resident on the filesystem. 402 */ 403 if (mode & VWRITE) { 404 switch ((int)vp->v_type) { 405 case VDIR: 406 case VLNK: 407 case VREG: 408 if (vp->v_mount->mnt_flag & MNT_RDONLY) 409 return (EROFS); 410 #ifdef QUOTA 411 if (error = getinoquota(ip)) 412 return (error); 413 #endif 414 break; 415 } 416 } 417 418 return (vaccess(vp->v_type, ip->i_mp->ntm_mode, ip->i_mp->ntm_uid, 419 ip->i_mp->ntm_gid, ap->a_mode, ap->a_cred, NULL)); 420 } 421 422 /* 423 * Open called. 424 * 425 * Nothing to do. 426 */ 427 /* ARGSUSED */ 428 static int 429 ntfs_open(ap) 430 struct vop_open_args /* { 431 struct vnode *a_vp; 432 int a_mode; 433 struct ucred *a_cred; 434 struct thread *a_td; 435 } */ *ap; 436 { 437 #if NTFS_DEBUG 438 register struct vnode *vp = ap->a_vp; 439 register struct ntnode *ip = VTONT(vp); 440 441 printf("ntfs_open: %d\n",ip->i_number); 442 #endif 443 444 vnode_create_vobject(ap->a_vp, VTOF(ap->a_vp)->f_size, ap->a_td); 445 446 /* 447 * Files marked append-only must be opened for appending. 448 */ 449 450 return (0); 451 } 452 453 /* 454 * Close called. 455 * 456 * Update the times on the inode. 457 */ 458 /* ARGSUSED */ 459 static int 460 ntfs_close(ap) 461 struct vop_close_args /* { 462 struct vnode *a_vp; 463 int a_fflag; 464 struct ucred *a_cred; 465 struct thread *a_td; 466 } */ *ap; 467 { 468 #if NTFS_DEBUG 469 register struct vnode *vp = ap->a_vp; 470 register struct ntnode *ip = VTONT(vp); 471 472 printf("ntfs_close: %d\n",ip->i_number); 473 #endif 474 475 return (0); 476 } 477 478 int 479 ntfs_readdir(ap) 480 struct vop_readdir_args /* { 481 struct vnode *a_vp; 482 struct uio *a_uio; 483 struct ucred *a_cred; 484 int *a_ncookies; 485 u_int **cookies; 486 } */ *ap; 487 { 488 register struct vnode *vp = ap->a_vp; 489 register struct fnode *fp = VTOF(vp); 490 register struct ntnode *ip = FTONT(fp); 491 struct uio *uio = ap->a_uio; 492 struct ntfsmount *ntmp = ip->i_mp; 493 int i, j, error = 0; 494 wchar c; 495 u_int32_t faked = 0, num; 496 int ncookies = 0; 497 struct dirent cde; 498 off_t off; 499 500 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid)); 501 502 off = uio->uio_offset; 503 504 /* Simulate . in every dir except ROOT */ 505 if( ip->i_number != NTFS_ROOTINO ) { 506 struct dirent dot = { NTFS_ROOTINO, 507 sizeof(struct dirent), DT_DIR, 1, "." }; 508 509 if( uio->uio_offset < sizeof(struct dirent) ) { 510 dot.d_fileno = ip->i_number; 511 error = uiomove((char *)&dot,sizeof(struct dirent),uio); 512 if(error) 513 return (error); 514 515 ncookies ++; 516 } 517 } 518 519 /* Simulate .. in every dir including ROOT */ 520 if( uio->uio_offset < 2 * sizeof(struct dirent) ) { 521 struct dirent dotdot = { NTFS_ROOTINO, 522 sizeof(struct dirent), DT_DIR, 2, ".." }; 523 524 error = uiomove((char *)&dotdot,sizeof(struct dirent),uio); 525 if(error) 526 return (error); 527 528 ncookies ++; 529 } 530 531 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 532 num = uio->uio_offset / sizeof(struct dirent) - faked; 533 534 while( uio->uio_resid >= sizeof(struct dirent) ) { 535 struct attr_indexentry *iep; 536 537 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 538 539 if(error) 540 return (error); 541 542 if( NULL == iep ) 543 break; 544 545 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 546 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 547 { 548 if(!ntfs_isnamepermitted(ntmp,iep)) 549 continue; 550 551 for(i=0, j=0; i<iep->ie_fnamelen; i++, j++) { 552 c = NTFS_U28(iep->ie_fname[i]); 553 if (c&0xFF00) 554 cde.d_name[j++] = (char)(c>>8); 555 cde.d_name[j] = (char)c&0xFF; 556 } 557 cde.d_name[j] = '\0'; 558 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 559 num, cde.d_name, iep->ie_fnametype, 560 iep->ie_flag)); 561 cde.d_namlen = j; 562 cde.d_fileno = iep->ie_number; 563 cde.d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 564 cde.d_reclen = sizeof(struct dirent); 565 dprintf(("%s\n", (cde.d_type == DT_DIR) ? "dir":"reg")); 566 567 error = uiomove((char *)&cde, sizeof(struct dirent), uio); 568 if(error) 569 return (error); 570 571 ncookies++; 572 num++; 573 } 574 } 575 576 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 577 ncookies,(u_int)(uio->uio_offset - off))); 578 dprintf(("ntfs_readdir: off: %d resid: %d\n", 579 (u_int32_t)uio->uio_offset,uio->uio_resid)); 580 581 if (!error && ap->a_ncookies != NULL) { 582 struct dirent* dpStart; 583 struct dirent* dp; 584 u_long *cookies; 585 u_long *cookiep; 586 587 ddprintf(("ntfs_readdir: %d cookies\n",ncookies)); 588 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 589 panic("ntfs_readdir: unexpected uio from NFS server"); 590 dpStart = (struct dirent *) 591 ((caddr_t)uio->uio_iov->iov_base - 592 (uio->uio_offset - off)); 593 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 594 M_TEMP, M_WAITOK); 595 for (dp = dpStart, cookiep = cookies, i=0; 596 i < ncookies; 597 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) { 598 off += dp->d_reclen; 599 *cookiep++ = (u_int) off; 600 } 601 *ap->a_ncookies = ncookies; 602 *ap->a_cookies = cookies; 603 } 604 /* 605 if (ap->a_eofflag) 606 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 607 */ 608 return (error); 609 } 610 611 int 612 ntfs_lookup(ap) 613 struct vop_cachedlookup_args /* { 614 struct vnode *a_dvp; 615 struct vnode **a_vpp; 616 struct componentname *a_cnp; 617 } */ *ap; 618 { 619 register struct vnode *dvp = ap->a_dvp; 620 register struct ntnode *dip = VTONT(dvp); 621 struct ntfsmount *ntmp = dip->i_mp; 622 struct componentname *cnp = ap->a_cnp; 623 struct ucred *cred = cnp->cn_cred; 624 int error; 625 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d\n", 626 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen, 627 dip->i_number)); 628 629 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread); 630 if(error) 631 return (error); 632 633 if ((cnp->cn_flags & ISLASTCN) && 634 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 635 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 636 return (EROFS); 637 638 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 639 dprintf(("ntfs_lookup: faking . directory in %d\n", 640 dip->i_number)); 641 642 VREF(dvp); 643 *ap->a_vpp = dvp; 644 error = 0; 645 } else if (cnp->cn_flags & ISDOTDOT) { 646 struct ntvattr *vap; 647 648 dprintf(("ntfs_lookup: faking .. directory in %d\n", 649 dip->i_number)); 650 651 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 652 if(error) 653 return (error); 654 655 VOP_UNLOCK(dvp,0,cnp->cn_thread); 656 dprintf(("ntfs_lookup: parentdir: %d\n", 657 vap->va_a_name->n_pnumber)); 658 error = VFS_VGET(ntmp->ntm_mountp, vap->va_a_name->n_pnumber, 659 LK_EXCLUSIVE, ap->a_vpp); 660 ntfs_ntvattrrele(vap); 661 if (error) { 662 vn_lock(dvp,LK_EXCLUSIVE|LK_RETRY,cnp->cn_thread); 663 return (error); 664 } 665 } else { 666 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 667 if (error) { 668 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 669 return (error); 670 } 671 672 dprintf(("ntfs_lookup: found ino: %d\n", 673 VTONT(*ap->a_vpp)->i_number)); 674 } 675 676 if (cnp->cn_flags & MAKEENTRY) 677 cache_enter(dvp, *ap->a_vpp, cnp); 678 679 return (error); 680 } 681 682 /* 683 * Flush the blocks of a file to disk. 684 * 685 * This function is worthless for vnodes that represent directories. Maybe we 686 * could just do a sync if they try an fsync on a directory file. 687 */ 688 static int 689 ntfs_fsync(ap) 690 struct vop_fsync_args /* { 691 struct vnode *a_vp; 692 struct ucred *a_cred; 693 int a_waitfor; 694 struct thread *a_td; 695 } */ *ap; 696 { 697 return (0); 698 } 699 700 /* 701 * Return POSIX pathconf information applicable to NTFS filesystem 702 */ 703 int 704 ntfs_pathconf(ap) 705 struct vop_pathconf_args *ap; 706 { 707 708 switch (ap->a_name) { 709 case _PC_LINK_MAX: 710 *ap->a_retval = 1; 711 return (0); 712 case _PC_NAME_MAX: 713 *ap->a_retval = NTFS_MAXFILENAME; 714 return (0); 715 case _PC_PATH_MAX: 716 *ap->a_retval = PATH_MAX; 717 return (0); 718 case _PC_CHOWN_RESTRICTED: 719 *ap->a_retval = 1; 720 return (0); 721 case _PC_NO_TRUNC: 722 *ap->a_retval = 0; 723 return (0); 724 default: 725 return (EINVAL); 726 } 727 /* NOTREACHED */ 728 } 729 730 /* 731 * Global vfs data structures 732 */ 733 struct vop_vector ntfs_vnodeops = { 734 .vop_default = &default_vnodeops, 735 736 .vop_access = ntfs_access, 737 .vop_bmap = ntfs_bmap, 738 .vop_cachedlookup = ntfs_lookup, 739 .vop_close = ntfs_close, 740 .vop_fsync = ntfs_fsync, 741 .vop_getattr = ntfs_getattr, 742 .vop_inactive = ntfs_inactive, 743 .vop_lookup = vfs_cache_lookup, 744 .vop_open = ntfs_open, 745 .vop_pathconf = ntfs_pathconf, 746 .vop_read = ntfs_read, 747 .vop_readdir = ntfs_readdir, 748 .vop_reclaim = ntfs_reclaim, 749 .vop_strategy = ntfs_strategy, 750 .vop_write = ntfs_write, 751 };
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