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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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * $FreeBSD: releng/5.2/sys/fs/ntfs/ntfs_vnops.c 120775 2003-10-05 02:43:30Z jeff $ 39 * 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/time.h> 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <sys/vnode.h> 49 #include <sys/mount.h> 50 #include <sys/namei.h> 51 #include <sys/malloc.h> 52 #include <sys/bio.h> 53 #include <sys/buf.h> 54 #include <sys/dirent.h> 55 56 #include <vm/vm.h> 57 #include <vm/vm_param.h> 58 #include <vm/vm_page.h> 59 #include <vm/vm_object.h> 60 #include <vm/vm_pager.h> 61 #include <vm/vnode_pager.h> 62 #include <vm/vm_extern.h> 63 64 #include <sys/sysctl.h> 65 66 /*#define NTFS_DEBUG 1*/ 67 #include <fs/ntfs/ntfs.h> 68 #include <fs/ntfs/ntfs_inode.h> 69 #include <fs/ntfs/ntfs_subr.h> 70 71 #include <sys/unistd.h> /* for pathconf(2) constants */ 72 73 static int ntfs_read(struct vop_read_args *); 74 static int ntfs_write(struct vop_write_args *ap); 75 static int ntfs_getattr(struct vop_getattr_args *ap); 76 static int ntfs_inactive(struct vop_inactive_args *ap); 77 static int ntfs_reclaim(struct vop_reclaim_args *ap); 78 static int ntfs_bmap(struct vop_bmap_args *ap); 79 static int ntfs_strategy(struct vop_strategy_args *ap); 80 static int ntfs_access(struct vop_access_args *ap); 81 static int ntfs_open(struct vop_open_args *ap); 82 static int ntfs_close(struct vop_close_args *ap); 83 static int ntfs_readdir(struct vop_readdir_args *ap); 84 static int ntfs_lookup(struct vop_lookup_args *ap); 85 static int ntfs_fsync(struct vop_fsync_args *ap); 86 static int ntfs_pathconf(void *); 87 88 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */ 89 90 /* 91 * This is a noop, simply returning what one has been given. 92 */ 93 int 94 ntfs_bmap(ap) 95 struct vop_bmap_args /* { 96 struct vnode *a_vp; 97 daddr_t a_bn; 98 struct vnode **a_vpp; 99 daddr_t *a_bnp; 100 int *a_runp; 101 int *a_runb; 102 } */ *ap; 103 { 104 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 105 if (ap->a_vpp != NULL) 106 *ap->a_vpp = ap->a_vp; 107 if (ap->a_bnp != NULL) 108 *ap->a_bnp = ap->a_bn; 109 if (ap->a_runp != NULL) 110 *ap->a_runp = 0; 111 if (ap->a_runb != NULL) 112 *ap->a_runb = 0; 113 return (0); 114 } 115 116 static int 117 ntfs_read(ap) 118 struct vop_read_args /* { 119 struct vnode *a_vp; 120 struct uio *a_uio; 121 int a_ioflag; 122 struct ucred *a_cred; 123 } */ *ap; 124 { 125 register struct vnode *vp = ap->a_vp; 126 register struct fnode *fp = VTOF(vp); 127 register struct ntnode *ip = FTONT(fp); 128 struct uio *uio = ap->a_uio; 129 struct ntfsmount *ntmp = ip->i_mp; 130 struct buf *bp; 131 daddr_t cn; 132 int resid, off, toread; 133 int error; 134 135 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)); 136 137 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size)); 138 139 /* don't allow reading after end of file */ 140 if (uio->uio_offset > fp->f_size) 141 return (0); 142 143 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset); 144 145 dprintf((", resid: %d\n", resid)); 146 147 error = 0; 148 while (resid) { 149 cn = ntfs_btocn(uio->uio_offset); 150 off = ntfs_btocnoff(uio->uio_offset); 151 152 toread = min(off + resid, ntfs_cntob(1)); 153 154 error = bread(vp, cn, ntfs_cntob(1), NOCRED, &bp); 155 if (error) { 156 brelse(bp); 157 break; 158 } 159 160 error = uiomove(bp->b_data + off, toread - off, uio); 161 if(error) { 162 brelse(bp); 163 break; 164 } 165 brelse(bp); 166 167 resid -= toread - off; 168 } 169 170 return (error); 171 } 172 173 static int 174 ntfs_getattr(ap) 175 struct vop_getattr_args /* { 176 struct vnode *a_vp; 177 struct vattr *a_vap; 178 struct ucred *a_cred; 179 struct thread *a_td; 180 } */ *ap; 181 { 182 register struct vnode *vp = ap->a_vp; 183 register struct fnode *fp = VTOF(vp); 184 register struct ntnode *ip = FTONT(fp); 185 register struct vattr *vap = ap->a_vap; 186 187 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag)); 188 189 vap->va_fsid = dev2udev(ip->i_dev); 190 vap->va_fileid = ip->i_number; 191 vap->va_mode = ip->i_mp->ntm_mode; 192 vap->va_nlink = ip->i_nlink; 193 vap->va_uid = ip->i_mp->ntm_uid; 194 vap->va_gid = ip->i_mp->ntm_gid; 195 vap->va_rdev = 0; /* XXX UNODEV ? */ 196 vap->va_size = fp->f_size; 197 vap->va_bytes = fp->f_allocated; 198 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 199 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 200 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 201 vap->va_flags = ip->i_flag; 202 vap->va_gen = 0; 203 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 204 vap->va_type = vp->v_type; 205 vap->va_filerev = 0; 206 return (0); 207 } 208 209 /* 210 * Last reference to an ntnode. If necessary, write or delete it. 211 */ 212 int 213 ntfs_inactive(ap) 214 struct vop_inactive_args /* { 215 struct vnode *a_vp; 216 } */ *ap; 217 { 218 register struct vnode *vp = ap->a_vp; 219 #ifdef NTFS_DEBUG 220 register struct ntnode *ip = VTONT(vp); 221 #endif 222 223 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 224 225 if (ntfs_prtactive && vrefcnt(vp) != 0) 226 vprint("ntfs_inactive: pushing active", vp); 227 228 VOP_UNLOCK(vp, 0, ap->a_td); 229 230 /* XXX since we don't support any filesystem changes 231 * right now, nothing more needs to be done 232 */ 233 return (0); 234 } 235 236 /* 237 * Reclaim an fnode/ntnode so that it can be used for other purposes. 238 */ 239 int 240 ntfs_reclaim(ap) 241 struct vop_reclaim_args /* { 242 struct vnode *a_vp; 243 } */ *ap; 244 { 245 register struct vnode *vp = ap->a_vp; 246 register struct fnode *fp = VTOF(vp); 247 register struct ntnode *ip = FTONT(fp); 248 int error; 249 250 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 251 252 if (ntfs_prtactive && vrefcnt(vp) != 0) 253 vprint("ntfs_reclaim: pushing active", vp); 254 255 if ((error = ntfs_ntget(ip)) != 0) 256 return (error); 257 258 /* Purge old data structures associated with the inode. */ 259 ntfs_frele(fp); 260 ntfs_ntput(ip); 261 vp->v_data = NULL; 262 263 return (0); 264 } 265 266 /* 267 * Calculate the logical to physical mapping if not done already, 268 * then call the device strategy routine. 269 */ 270 int 271 ntfs_strategy(ap) 272 struct vop_strategy_args /* { 273 struct buf *a_bp; 274 } */ *ap; 275 { 276 register struct buf *bp = ap->a_bp; 277 register struct vnode *vp = bp->b_vp; 278 register struct fnode *fp = VTOF(vp); 279 register struct ntnode *ip = FTONT(fp); 280 struct ntfsmount *ntmp = ip->i_mp; 281 int error; 282 283 KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)", 284 __func__, ap->a_vp, ap->a_bp->b_vp)); 285 dprintf(("ntfs_strategy: offset: %d, blkno: %d, lblkno: %d\n", 286 (u_int32_t)bp->b_offset,(u_int32_t)bp->b_blkno, 287 (u_int32_t)bp->b_lblkno)); 288 289 dprintf(("strategy: bcount: %d flags: 0x%lx\n", 290 (u_int32_t)bp->b_bcount,bp->b_flags)); 291 292 if (bp->b_iocmd == BIO_READ) { 293 u_int32_t toread; 294 295 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 296 clrbuf(bp); 297 error = 0; 298 } else { 299 toread = min(bp->b_bcount, 300 fp->f_size-ntfs_cntob(bp->b_blkno)); 301 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 302 toread,(u_int32_t)fp->f_size)); 303 304 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 305 fp->f_attrname, ntfs_cntob(bp->b_blkno), 306 toread, bp->b_data, NULL); 307 308 if (error) { 309 printf("ntfs_strategy: ntfs_readattr failed\n"); 310 bp->b_error = error; 311 bp->b_ioflags |= BIO_ERROR; 312 } 313 314 bzero(bp->b_data + toread, bp->b_bcount - toread); 315 } 316 } else { 317 size_t tmp; 318 u_int32_t towrite; 319 320 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 321 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 322 bp->b_error = error = EFBIG; 323 bp->b_ioflags |= BIO_ERROR; 324 } else { 325 towrite = min(bp->b_bcount, 326 fp->f_size-ntfs_cntob(bp->b_blkno)); 327 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 328 towrite,(u_int32_t)fp->f_size)); 329 330 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 331 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 332 bp->b_data, &tmp, NULL); 333 334 if (error) { 335 printf("ntfs_strategy: ntfs_writeattr fail\n"); 336 bp->b_error = error; 337 bp->b_ioflags |= BIO_ERROR; 338 } 339 } 340 } 341 bufdone(bp); 342 return (error); 343 } 344 345 static int 346 ntfs_write(ap) 347 struct vop_write_args /* { 348 struct vnode *a_vp; 349 struct uio *a_uio; 350 int a_ioflag; 351 struct ucred *a_cred; 352 } */ *ap; 353 { 354 register struct vnode *vp = ap->a_vp; 355 register struct fnode *fp = VTOF(vp); 356 register struct ntnode *ip = FTONT(fp); 357 struct uio *uio = ap->a_uio; 358 struct ntfsmount *ntmp = ip->i_mp; 359 u_int64_t towrite; 360 size_t written; 361 int error; 362 363 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)); 364 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size)); 365 366 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 367 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 368 return (EFBIG); 369 } 370 371 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset); 372 373 dprintf((", towrite: %d\n",(u_int32_t)towrite)); 374 375 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 376 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 377 #ifdef NTFS_DEBUG 378 if (error) 379 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 380 #endif 381 382 return (error); 383 } 384 385 int 386 ntfs_access(ap) 387 struct vop_access_args /* { 388 struct vnode *a_vp; 389 int a_mode; 390 struct ucred *a_cred; 391 struct thread *a_td; 392 } */ *ap; 393 { 394 struct vnode *vp = ap->a_vp; 395 struct ntnode *ip = VTONT(vp); 396 mode_t mode = ap->a_mode; 397 #ifdef QUOTA 398 int error; 399 #endif 400 401 dprintf(("ntfs_access: %d\n",ip->i_number)); 402 403 /* 404 * Disallow write attempts on read-only filesystems; 405 * unless the file is a socket, fifo, or a block or 406 * character device resident on the filesystem. 407 */ 408 if (mode & VWRITE) { 409 switch ((int)vp->v_type) { 410 case VDIR: 411 case VLNK: 412 case VREG: 413 if (vp->v_mount->mnt_flag & MNT_RDONLY) 414 return (EROFS); 415 #ifdef QUOTA 416 if (error = getinoquota(ip)) 417 return (error); 418 #endif 419 break; 420 } 421 } 422 423 return (vaccess(vp->v_type, ip->i_mp->ntm_mode, ip->i_mp->ntm_uid, 424 ip->i_mp->ntm_gid, ap->a_mode, ap->a_cred, NULL)); 425 } 426 427 /* 428 * Open called. 429 * 430 * Nothing to do. 431 */ 432 /* ARGSUSED */ 433 static int 434 ntfs_open(ap) 435 struct vop_open_args /* { 436 struct vnode *a_vp; 437 int a_mode; 438 struct ucred *a_cred; 439 struct thread *a_td; 440 } */ *ap; 441 { 442 #if NTFS_DEBUG 443 register struct vnode *vp = ap->a_vp; 444 register struct ntnode *ip = VTONT(vp); 445 446 printf("ntfs_open: %d\n",ip->i_number); 447 #endif 448 449 /* 450 * Files marked append-only must be opened for appending. 451 */ 452 453 return (0); 454 } 455 456 /* 457 * Close called. 458 * 459 * Update the times on the inode. 460 */ 461 /* ARGSUSED */ 462 static int 463 ntfs_close(ap) 464 struct vop_close_args /* { 465 struct vnode *a_vp; 466 int a_fflag; 467 struct ucred *a_cred; 468 struct thread *a_td; 469 } */ *ap; 470 { 471 #if NTFS_DEBUG 472 register struct vnode *vp = ap->a_vp; 473 register struct ntnode *ip = VTONT(vp); 474 475 printf("ntfs_close: %d\n",ip->i_number); 476 #endif 477 478 return (0); 479 } 480 481 int 482 ntfs_readdir(ap) 483 struct vop_readdir_args /* { 484 struct vnode *a_vp; 485 struct uio *a_uio; 486 struct ucred *a_cred; 487 int *a_ncookies; 488 u_int **cookies; 489 } */ *ap; 490 { 491 register struct vnode *vp = ap->a_vp; 492 register struct fnode *fp = VTOF(vp); 493 register struct ntnode *ip = FTONT(fp); 494 struct uio *uio = ap->a_uio; 495 struct ntfsmount *ntmp = ip->i_mp; 496 int i, j, error = 0; 497 wchar c; 498 u_int32_t faked = 0, num; 499 int ncookies = 0; 500 struct dirent cde; 501 off_t off; 502 503 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid)); 504 505 off = uio->uio_offset; 506 507 /* Simulate . in every dir except ROOT */ 508 if( ip->i_number != NTFS_ROOTINO ) { 509 struct dirent dot = { NTFS_ROOTINO, 510 sizeof(struct dirent), DT_DIR, 1, "." }; 511 512 if( uio->uio_offset < sizeof(struct dirent) ) { 513 dot.d_fileno = ip->i_number; 514 error = uiomove((char *)&dot,sizeof(struct dirent),uio); 515 if(error) 516 return (error); 517 518 ncookies ++; 519 } 520 } 521 522 /* Simulate .. in every dir including ROOT */ 523 if( uio->uio_offset < 2 * sizeof(struct dirent) ) { 524 struct dirent dotdot = { NTFS_ROOTINO, 525 sizeof(struct dirent), DT_DIR, 2, ".." }; 526 527 error = uiomove((char *)&dotdot,sizeof(struct dirent),uio); 528 if(error) 529 return (error); 530 531 ncookies ++; 532 } 533 534 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 535 num = uio->uio_offset / sizeof(struct dirent) - faked; 536 537 while( uio->uio_resid >= sizeof(struct dirent) ) { 538 struct attr_indexentry *iep; 539 540 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 541 542 if(error) 543 return (error); 544 545 if( NULL == iep ) 546 break; 547 548 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 549 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 550 { 551 if(!ntfs_isnamepermitted(ntmp,iep)) 552 continue; 553 554 for(i=0, j=0; i<iep->ie_fnamelen; i++, j++) { 555 c = NTFS_U28(iep->ie_fname[i]); 556 if (c&0xFF00) 557 cde.d_name[j++] = (char)(c>>8); 558 cde.d_name[j] = (char)c&0xFF; 559 } 560 cde.d_name[j] = '\0'; 561 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 562 num, cde.d_name, iep->ie_fnametype, 563 iep->ie_flag)); 564 cde.d_namlen = j; 565 cde.d_fileno = iep->ie_number; 566 cde.d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 567 cde.d_reclen = sizeof(struct dirent); 568 dprintf(("%s\n", (cde.d_type == DT_DIR) ? "dir":"reg")); 569 570 error = uiomove((char *)&cde, sizeof(struct dirent), uio); 571 if(error) 572 return (error); 573 574 ncookies++; 575 num++; 576 } 577 } 578 579 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 580 ncookies,(u_int)(uio->uio_offset - off))); 581 dprintf(("ntfs_readdir: off: %d resid: %d\n", 582 (u_int32_t)uio->uio_offset,uio->uio_resid)); 583 584 if (!error && ap->a_ncookies != NULL) { 585 struct dirent* dpStart; 586 struct dirent* dp; 587 u_long *cookies; 588 u_long *cookiep; 589 590 ddprintf(("ntfs_readdir: %d cookies\n",ncookies)); 591 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 592 panic("ntfs_readdir: unexpected uio from NFS server"); 593 dpStart = (struct dirent *) 594 ((caddr_t)uio->uio_iov->iov_base - 595 (uio->uio_offset - off)); 596 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), 597 M_TEMP, M_WAITOK); 598 for (dp = dpStart, cookiep = cookies, i=0; 599 i < ncookies; 600 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) { 601 off += dp->d_reclen; 602 *cookiep++ = (u_int) off; 603 } 604 *ap->a_ncookies = ncookies; 605 *ap->a_cookies = cookies; 606 } 607 /* 608 if (ap->a_eofflag) 609 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 610 */ 611 return (error); 612 } 613 614 int 615 ntfs_lookup(ap) 616 struct vop_lookup_args /* { 617 struct vnode *a_dvp; 618 struct vnode **a_vpp; 619 struct componentname *a_cnp; 620 } */ *ap; 621 { 622 register struct vnode *dvp = ap->a_dvp; 623 register struct ntnode *dip = VTONT(dvp); 624 struct ntfsmount *ntmp = dip->i_mp; 625 struct componentname *cnp = ap->a_cnp; 626 struct ucred *cred = cnp->cn_cred; 627 int error; 628 int lockparent = cnp->cn_flags & LOCKPARENT; 629 #if NTFS_DEBUG 630 int wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT); 631 #endif 632 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n", 633 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen, 634 dip->i_number, lockparent, wantparent)); 635 636 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread); 637 if(error) 638 return (error); 639 640 if ((cnp->cn_flags & ISLASTCN) && 641 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 642 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 643 return (EROFS); 644 645 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 646 dprintf(("ntfs_lookup: faking . directory in %d\n", 647 dip->i_number)); 648 649 VREF(dvp); 650 *ap->a_vpp = dvp; 651 error = 0; 652 } else if (cnp->cn_flags & ISDOTDOT) { 653 struct ntvattr *vap; 654 655 dprintf(("ntfs_lookup: faking .. directory in %d\n", 656 dip->i_number)); 657 658 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 659 if(error) 660 return (error); 661 662 VOP_UNLOCK(dvp,0,cnp->cn_thread); 663 cnp->cn_flags |= PDIRUNLOCK; 664 665 dprintf(("ntfs_lookup: parentdir: %d\n", 666 vap->va_a_name->n_pnumber)); 667 error = VFS_VGET(ntmp->ntm_mountp, vap->va_a_name->n_pnumber, 668 LK_EXCLUSIVE, ap->a_vpp); 669 ntfs_ntvattrrele(vap); 670 if (error) { 671 if (vn_lock(dvp,LK_EXCLUSIVE|LK_RETRY,cnp->cn_thread)==0) 672 cnp->cn_flags &= ~PDIRUNLOCK; 673 return (error); 674 } 675 676 if (lockparent && (cnp->cn_flags & ISLASTCN)) { 677 error = vn_lock(dvp, LK_EXCLUSIVE, cnp->cn_thread); 678 if (error) { 679 vput( *(ap->a_vpp) ); 680 return (error); 681 } 682 cnp->cn_flags &= ~PDIRUNLOCK; 683 } 684 } else { 685 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 686 if (error) { 687 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 688 return (error); 689 } 690 691 dprintf(("ntfs_lookup: found ino: %d\n", 692 VTONT(*ap->a_vpp)->i_number)); 693 694 if(!lockparent || !(cnp->cn_flags & ISLASTCN)) 695 VOP_UNLOCK(dvp, 0, cnp->cn_thread); 696 } 697 698 if (cnp->cn_flags & MAKEENTRY) 699 cache_enter(dvp, *ap->a_vpp, cnp); 700 701 return (error); 702 } 703 704 /* 705 * Flush the blocks of a file to disk. 706 * 707 * This function is worthless for vnodes that represent directories. Maybe we 708 * could just do a sync if they try an fsync on a directory file. 709 */ 710 static int 711 ntfs_fsync(ap) 712 struct vop_fsync_args /* { 713 struct vnode *a_vp; 714 struct ucred *a_cred; 715 int a_waitfor; 716 struct thread *a_td; 717 } */ *ap; 718 { 719 return (0); 720 } 721 722 /* 723 * Return POSIX pathconf information applicable to NTFS filesystem 724 */ 725 int 726 ntfs_pathconf(v) 727 void *v; 728 { 729 struct vop_pathconf_args /* { 730 struct vnode *a_vp; 731 int a_name; 732 register_t *a_retval; 733 } */ *ap = v; 734 735 switch (ap->a_name) { 736 case _PC_LINK_MAX: 737 *ap->a_retval = 1; 738 return (0); 739 case _PC_NAME_MAX: 740 *ap->a_retval = NTFS_MAXFILENAME; 741 return (0); 742 case _PC_PATH_MAX: 743 *ap->a_retval = PATH_MAX; 744 return (0); 745 case _PC_CHOWN_RESTRICTED: 746 *ap->a_retval = 1; 747 return (0); 748 case _PC_NO_TRUNC: 749 *ap->a_retval = 0; 750 return (0); 751 default: 752 return (EINVAL); 753 } 754 /* NOTREACHED */ 755 } 756 757 /* 758 * Global vfs data structures 759 */ 760 vop_t **ntfs_vnodeop_p; 761 static 762 struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 763 { &vop_default_desc, (vop_t *)vop_defaultop }, 764 765 { &vop_getattr_desc, (vop_t *)ntfs_getattr }, 766 { &vop_inactive_desc, (vop_t *)ntfs_inactive }, 767 { &vop_reclaim_desc, (vop_t *)ntfs_reclaim }, 768 { &vop_pathconf_desc, ntfs_pathconf }, 769 770 { &vop_cachedlookup_desc, (vop_t *)ntfs_lookup }, 771 { &vop_lookup_desc, (vop_t *)vfs_cache_lookup }, 772 773 { &vop_access_desc, (vop_t *)ntfs_access }, 774 { &vop_close_desc, (vop_t *)ntfs_close }, 775 { &vop_open_desc, (vop_t *)ntfs_open }, 776 { &vop_readdir_desc, (vop_t *)ntfs_readdir }, 777 { &vop_fsync_desc, (vop_t *)ntfs_fsync }, 778 779 { &vop_bmap_desc, (vop_t *)ntfs_bmap }, 780 { &vop_strategy_desc, (vop_t *)ntfs_strategy }, 781 { &vop_read_desc, (vop_t *)ntfs_read }, 782 { &vop_write_desc, (vop_t *)ntfs_write }, 783 784 { NULL, NULL } 785 }; 786 787 static 788 struct vnodeopv_desc ntfs_vnodeop_opv_desc = 789 { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; 790 791 VNODEOP_SET(ntfs_vnodeop_opv_desc);
Cache object: 76bc726fbf74a113739abf5788f0d4a9
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