1 /* $NetBSD: msdosfs_denode.c,v 1.28 1998/02/10 14:10:00 mrg Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-4-Clause 5 * 6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 8 * All rights reserved. 9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by TooLs GmbH. 22 * 4. The name of TooLs GmbH may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 /*- 37 * Written by Paul Popelka (paulp@uts.amdahl.com) 38 * 39 * You can do anything you want with this software, just don't say you wrote 40 * it, and don't remove this notice. 41 * 42 * This software is provided "as is". 43 * 44 * The author supplies this software to be publicly redistributed on the 45 * understanding that the author is not responsible for the correct 46 * functioning of this software in any circumstances and is not liable for 47 * any damages caused by this software. 48 * 49 * October 1992 50 */ 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/buf.h> 55 #include <sys/clock.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/mount.h> 59 #include <sys/vmmeter.h> 60 #include <sys/vnode.h> 61 62 #include <vm/vm.h> 63 #include <vm/vm_extern.h> 64 65 #include <fs/msdosfs/bpb.h> 66 #include <fs/msdosfs/direntry.h> 67 #include <fs/msdosfs/denode.h> 68 #include <fs/msdosfs/fat.h> 69 #include <fs/msdosfs/msdosfsmount.h> 70 71 static MALLOC_DEFINE(M_MSDOSFSNODE, "msdosfs_node", "MSDOSFS vnode private part"); 72 73 static int 74 de_vncmpf(struct vnode *vp, void *arg) 75 { 76 struct denode *de; 77 uint64_t *a; 78 79 a = arg; 80 de = VTODE(vp); 81 return (de->de_inode != *a) || (de->de_refcnt <= 0); 82 } 83 84 /* 85 * If deget() succeeds it returns with the gotten denode locked(). 86 * 87 * pmp - address of msdosfsmount structure of the filesystem containing 88 * the denode of interest. The address of 89 * the msdosfsmount structure are used. 90 * dirclust - which cluster bp contains, if dirclust is 0 (root directory) 91 * diroffset is relative to the beginning of the root directory, 92 * otherwise it is cluster relative. 93 * diroffset - offset past begin of cluster of denode we want 94 * lkflags - locking flags (LK_NOWAIT) 95 * depp - returns the address of the gotten denode. 96 */ 97 int 98 deget(struct msdosfsmount *pmp, u_long dirclust, u_long diroffset, 99 int lkflags, struct denode **depp) 100 { 101 int error; 102 uint64_t inode; 103 struct mount *mntp = pmp->pm_mountp; 104 struct direntry *direntptr; 105 struct denode *ldep; 106 struct vnode *nvp, *xvp; 107 struct buf *bp; 108 109 #ifdef MSDOSFS_DEBUG 110 printf("deget(pmp %p, dirclust %lu, diroffset %lx, flags %#x, " 111 "depp %p)\n", 112 pmp, dirclust, diroffset, lkflags, depp); 113 #endif 114 MPASS((lkflags & LK_TYPE_MASK) == LK_EXCLUSIVE); 115 116 /* 117 * On FAT32 filesystems, root is a (more or less) normal 118 * directory 119 */ 120 if (FAT32(pmp) && dirclust == MSDOSFSROOT) 121 dirclust = pmp->pm_rootdirblk; 122 123 /* 124 * See if the denode is in the denode cache. Use the location of 125 * the directory entry to compute the hash value. For subdir use 126 * address of "." entry. For root dir (if not FAT32) use cluster 127 * MSDOSFSROOT, offset MSDOSFSROOT_OFS 128 * 129 * NOTE: de_vncmpf will explicitly skip any denodes that do not have 130 * a de_refcnt > 0. This insures that we do not attempt to use 131 * a denode that represents an unlinked but still open file. 132 * These files are not to be accessible even when the directory 133 * entry that represented the file happens to be reused while the 134 * deleted file is still open. 135 */ 136 inode = (uint64_t)pmp->pm_bpcluster * dirclust + diroffset; 137 138 error = vfs_hash_get(mntp, inode, lkflags, curthread, &nvp, 139 de_vncmpf, &inode); 140 if (error) 141 return (error); 142 if (nvp != NULL) { 143 *depp = VTODE(nvp); 144 if ((*depp)->de_dirclust != dirclust) { 145 printf("%s: wrong dir cluster %lu %lu\n", 146 pmp->pm_mountp->mnt_stat.f_mntonname, 147 (*depp)->de_dirclust, dirclust); 148 goto badoff; 149 } 150 if ((*depp)->de_diroffset != diroffset) { 151 printf("%s: wrong dir offset %lu %lu\n", 152 pmp->pm_mountp->mnt_stat.f_mntonname, 153 (*depp)->de_diroffset, diroffset); 154 goto badoff; 155 } 156 return (0); 157 badoff: 158 vgone(nvp); 159 vput(nvp); 160 msdosfs_integrity_error(pmp); 161 return (EBADF); 162 } 163 ldep = malloc(sizeof(struct denode), M_MSDOSFSNODE, M_WAITOK | M_ZERO); 164 165 /* 166 * Directory entry was not in cache, have to create a vnode and 167 * copy it from the passed disk buffer. 168 */ 169 /* getnewvnode() does a VREF() on the vnode */ 170 error = getnewvnode("msdosfs", mntp, &msdosfs_vnodeops, &nvp); 171 if (error) { 172 *depp = NULL; 173 free(ldep, M_MSDOSFSNODE); 174 return error; 175 } 176 nvp->v_data = ldep; 177 ldep->de_vnode = nvp; 178 ldep->de_flag = 0; 179 ldep->de_dirclust = dirclust; 180 ldep->de_diroffset = diroffset; 181 ldep->de_inode = inode; 182 cluster_init_vn(&ldep->de_clusterw); 183 lockmgr(nvp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL); 184 VN_LOCK_AREC(nvp); /* for doscheckpath */ 185 fc_purge(ldep, 0); /* init the FAT cache for this denode */ 186 error = insmntque(nvp, mntp); 187 if (error != 0) { 188 free(ldep, M_MSDOSFSNODE); 189 *depp = NULL; 190 return (error); 191 } 192 error = vfs_hash_insert(nvp, inode, lkflags, curthread, &xvp, 193 de_vncmpf, &inode); 194 if (error) { 195 *depp = NULL; 196 return (error); 197 } 198 if (xvp != NULL) { 199 *depp = xvp->v_data; 200 return (0); 201 } 202 203 ldep->de_pmp = pmp; 204 ldep->de_refcnt = 1; 205 /* 206 * Copy the directory entry into the denode area of the vnode. 207 */ 208 if ((dirclust == MSDOSFSROOT || 209 (FAT32(pmp) && dirclust == pmp->pm_rootdirblk)) && 210 diroffset == MSDOSFSROOT_OFS) { 211 /* 212 * Directory entry for the root directory. There isn't one, 213 * so we manufacture one. We should probably rummage 214 * through the root directory and find a label entry (if it 215 * exists), and then use the time and date from that entry 216 * as the time and date for the root denode. 217 */ 218 nvp->v_vflag |= VV_ROOT; /* should be further down XXX */ 219 220 ldep->de_Attributes = ATTR_DIRECTORY; 221 ldep->de_LowerCase = 0; 222 if (FAT32(pmp)) 223 ldep->de_StartCluster = pmp->pm_rootdirblk; 224 /* de_FileSize will be filled in further down */ 225 else { 226 ldep->de_StartCluster = MSDOSFSROOT; 227 ldep->de_FileSize = pmp->pm_rootdirsize * DEV_BSIZE; 228 } 229 /* 230 * fill in time and date so that fattime2timespec() doesn't 231 * spit up when called from msdosfs_getattr() with root 232 * denode 233 */ 234 ldep->de_CHun = 0; 235 ldep->de_CTime = 0x0000; /* 00:00:00 */ 236 ldep->de_CDate = (0 << DD_YEAR_SHIFT) | (1 << DD_MONTH_SHIFT) 237 | (1 << DD_DAY_SHIFT); 238 /* Jan 1, 1980 */ 239 ldep->de_ADate = ldep->de_CDate; 240 ldep->de_MTime = ldep->de_CTime; 241 ldep->de_MDate = ldep->de_CDate; 242 /* leave the other fields as garbage */ 243 } else { 244 error = readep(pmp, dirclust, diroffset, &bp, &direntptr); 245 if (error) { 246 /* 247 * The denode does not contain anything useful, so 248 * it would be wrong to leave it on its hash chain. 249 * Arrange for vput() to just forget about it. 250 */ 251 ldep->de_Name[0] = SLOT_DELETED; 252 vgone(nvp); 253 vput(nvp); 254 *depp = NULL; 255 return (error); 256 } 257 (void)DE_INTERNALIZE(ldep, direntptr); 258 brelse(bp); 259 } 260 261 /* 262 * Fill in a few fields of the vnode and finish filling in the 263 * denode. Then return the address of the found denode. 264 */ 265 if (ldep->de_Attributes & ATTR_DIRECTORY) { 266 /* 267 * Since DOS directory entries that describe directories 268 * have 0 in the filesize field, we take this opportunity 269 * to find out the length of the directory and plug it into 270 * the denode structure. 271 */ 272 u_long size; 273 274 /* 275 * XXX it sometimes happens that the "." entry has cluster 276 * number 0 when it shouldn't. Use the actual cluster number 277 * instead of what is written in directory entry. 278 */ 279 if (diroffset == 0 && ldep->de_StartCluster != dirclust) { 280 #ifdef MSDOSFS_DEBUG 281 printf("deget(): \".\" entry at clust %lu != %lu\n", 282 dirclust, ldep->de_StartCluster); 283 #endif 284 ldep->de_StartCluster = dirclust; 285 } 286 287 nvp->v_type = VDIR; 288 if (ldep->de_StartCluster != MSDOSFSROOT) { 289 error = pcbmap(ldep, 0xffff, 0, &size, 0); 290 if (error == E2BIG) { 291 ldep->de_FileSize = de_cn2off(pmp, size); 292 error = 0; 293 } else { 294 #ifdef MSDOSFS_DEBUG 295 printf("deget(): pcbmap returned %d\n", error); 296 #endif 297 } 298 } 299 } else 300 nvp->v_type = VREG; 301 vn_set_state(nvp, VSTATE_CONSTRUCTED); 302 ldep->de_modrev = init_va_filerev(); 303 *depp = ldep; 304 return (0); 305 } 306 307 int 308 deupdat(struct denode *dep, int waitfor) 309 { 310 struct direntry dir; 311 struct timespec ts; 312 struct buf *bp; 313 struct direntry *dirp; 314 int error; 315 316 if (DETOV(dep)->v_mount->mnt_flag & MNT_RDONLY) { 317 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS | 318 DE_MODIFIED); 319 return (0); 320 } 321 vfs_timestamp(&ts); 322 DETIMES(dep, &ts, &ts, &ts); 323 if ((dep->de_flag & DE_MODIFIED) == 0 && waitfor == 0) 324 return (0); 325 dep->de_flag &= ~DE_MODIFIED; 326 if (DETOV(dep)->v_vflag & VV_ROOT) 327 return (EINVAL); 328 if (dep->de_refcnt <= 0) 329 return (0); 330 error = readde(dep, &bp, &dirp); 331 if (error) 332 return (error); 333 DE_EXTERNALIZE(&dir, dep); 334 if (bcmp(dirp, &dir, sizeof(dir)) == 0) { 335 if (waitfor == 0 || (bp->b_flags & B_DELWRI) == 0) { 336 brelse(bp); 337 return (0); 338 } 339 } else 340 *dirp = dir; 341 if ((DETOV(dep)->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 342 bp->b_flags |= B_CLUSTEROK; 343 if (waitfor) 344 error = bwrite(bp); 345 else if (vm_page_count_severe() || buf_dirty_count_severe()) 346 bawrite(bp); 347 else 348 bdwrite(bp); 349 return (error); 350 } 351 352 /* 353 * Truncate the file described by dep to the length specified by length. 354 */ 355 int 356 detrunc(struct denode *dep, u_long length, int flags, struct ucred *cred) 357 { 358 int error; 359 int allerror; 360 u_long eofentry; 361 u_long chaintofree; 362 daddr_t bn; 363 int boff; 364 int isadir = dep->de_Attributes & ATTR_DIRECTORY; 365 struct buf *bp; 366 struct msdosfsmount *pmp = dep->de_pmp; 367 368 #ifdef MSDOSFS_DEBUG 369 printf("detrunc(): file %s, length %lu, flags %x\n", dep->de_Name, length, flags); 370 #endif 371 372 /* 373 * Disallow attempts to truncate the root directory since it is of 374 * fixed size. That's just the way dos filesystems are. We use 375 * the VROOT bit in the vnode because checking for the directory 376 * bit and a startcluster of 0 in the denode is not adequate to 377 * recognize the root directory at this point in a file or 378 * directory's life. 379 */ 380 if ((DETOV(dep)->v_vflag & VV_ROOT) && !FAT32(pmp)) { 381 #ifdef MSDOSFS_DEBUG 382 printf("detrunc(): can't truncate root directory, clust %ld, offset %ld\n", 383 dep->de_dirclust, dep->de_diroffset); 384 #endif 385 return (EINVAL); 386 } 387 388 if (dep->de_FileSize < length) 389 return (deextend(dep, length, cred)); 390 391 /* 392 * If the desired length is 0 then remember the starting cluster of 393 * the file and set the StartCluster field in the directory entry 394 * to 0. If the desired length is not zero, then get the number of 395 * the last cluster in the shortened file. Then get the number of 396 * the first cluster in the part of the file that is to be freed. 397 * Then set the next cluster pointer in the last cluster of the 398 * file to CLUST_EOFE. 399 */ 400 if (length == 0) { 401 chaintofree = dep->de_StartCluster; 402 dep->de_StartCluster = 0; 403 eofentry = ~0; 404 } else { 405 error = pcbmap(dep, de_clcount(pmp, length) - 1, 0, 406 &eofentry, 0); 407 if (error) { 408 #ifdef MSDOSFS_DEBUG 409 printf("detrunc(): pcbmap fails %d\n", error); 410 #endif 411 return (error); 412 } 413 } 414 415 fc_purge(dep, de_clcount(pmp, length)); 416 417 /* 418 * If the new length is not a multiple of the cluster size then we 419 * must zero the tail end of the new last cluster in case it 420 * becomes part of the file again because of a seek. 421 */ 422 if ((boff = length & pmp->pm_crbomask) != 0) { 423 if (isadir) { 424 bn = cntobn(pmp, eofentry); 425 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 426 NOCRED, &bp); 427 } else { 428 error = bread(DETOV(dep), de_cluster(pmp, length), 429 pmp->pm_bpcluster, cred, &bp); 430 } 431 if (error) { 432 #ifdef MSDOSFS_DEBUG 433 printf("detrunc(): bread fails %d\n", error); 434 #endif 435 return (error); 436 } 437 memset(bp->b_data + boff, 0, pmp->pm_bpcluster - boff); 438 if ((flags & IO_SYNC) != 0) 439 bwrite(bp); 440 else 441 bdwrite(bp); 442 } 443 444 /* 445 * Write out the updated directory entry. Even if the update fails 446 * we free the trailing clusters. 447 */ 448 dep->de_FileSize = length; 449 if (!isadir) 450 dep->de_flag |= DE_UPDATE | DE_MODIFIED; 451 allerror = vtruncbuf(DETOV(dep), length, pmp->pm_bpcluster); 452 #ifdef MSDOSFS_DEBUG 453 if (allerror) 454 printf("detrunc(): vtruncbuf error %d\n", allerror); 455 #endif 456 error = deupdat(dep, !DOINGASYNC((DETOV(dep)))); 457 if (error != 0 && allerror == 0) 458 allerror = error; 459 #ifdef MSDOSFS_DEBUG 460 printf("detrunc(): allerror %d, eofentry %lu\n", 461 allerror, eofentry); 462 #endif 463 464 /* 465 * If we need to break the cluster chain for the file then do it 466 * now. 467 */ 468 if (eofentry != ~0) { 469 error = fatentry(FAT_GET_AND_SET, pmp, eofentry, 470 &chaintofree, CLUST_EOFE); 471 if (error) { 472 #ifdef MSDOSFS_DEBUG 473 printf("detrunc(): fatentry errors %d\n", error); 474 #endif 475 return (error); 476 } 477 fc_setcache(dep, FC_LASTFC, de_cluster(pmp, length - 1), 478 eofentry); 479 } 480 481 /* 482 * Now free the clusters removed from the file because of the 483 * truncation. 484 */ 485 if (chaintofree != 0 && !MSDOSFSEOF(pmp, chaintofree)) 486 freeclusterchain(pmp, chaintofree); 487 488 return (allerror); 489 } 490 491 /* 492 * Extend the file described by dep to length specified by length. 493 */ 494 int 495 deextend(struct denode *dep, u_long length, struct ucred *cred) 496 { 497 struct msdosfsmount *pmp = dep->de_pmp; 498 struct vnode *vp = DETOV(dep); 499 struct buf *bp; 500 off_t eof_clusteroff; 501 u_long count; 502 int error; 503 504 /* 505 * The root of a DOS filesystem cannot be extended. 506 */ 507 if ((vp->v_vflag & VV_ROOT) != 0 && !FAT32(pmp)) 508 return (EINVAL); 509 510 /* 511 * Directories cannot be extended. 512 */ 513 if (dep->de_Attributes & ATTR_DIRECTORY) 514 return (EISDIR); 515 516 if (length <= dep->de_FileSize) 517 panic("deextend: file too large"); 518 519 /* 520 * Compute the number of clusters to allocate. 521 */ 522 count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize); 523 if (count > 0) { 524 if (count > pmp->pm_freeclustercount) 525 return (ENOSPC); 526 error = extendfile(dep, count, NULL, NULL, DE_CLEAR); 527 if (error != 0) 528 goto rewind; 529 } 530 531 /* 532 * For the case of cluster size larger than the page size, we 533 * need to ensure that the possibly dirty partial buffer at 534 * the old end of file is not filled with invalid pages by 535 * extension. Otherwise it has a contradictory state of 536 * B_CACHE | B_DELWRI but with invalid pages, and cannot be 537 * neither written out nor validated. 538 * 539 * Fix it by proactively clearing extended pages. Need to do 540 * both vfs_bio_clrbuf() to mark pages valid, and to zero 541 * actual buffer content which might exist in the tail of the 542 * already valid cluster. 543 */ 544 error = bread(vp, de_cluster(pmp, dep->de_FileSize), pmp->pm_bpcluster, 545 NOCRED, &bp); 546 if (error != 0) 547 goto rewind; 548 vfs_bio_clrbuf(bp); 549 eof_clusteroff = de_cn2off(pmp, de_cluster(pmp, dep->de_FileSize)); 550 vfs_bio_bzero_buf(bp, dep->de_FileSize - eof_clusteroff, 551 pmp->pm_bpcluster - dep->de_FileSize + eof_clusteroff); 552 if (!DOINGASYNC(vp)) 553 (void)bwrite(bp); 554 else if (vm_page_count_severe() || buf_dirty_count_severe()) 555 bawrite(bp); 556 else 557 bdwrite(bp); 558 559 vnode_pager_setsize(vp, length); 560 dep->de_FileSize = length; 561 dep->de_flag |= DE_UPDATE | DE_MODIFIED; 562 return (deupdat(dep, !DOINGASYNC(vp))); 563 564 rewind: 565 /* truncate the added clusters away again */ 566 (void)detrunc(dep, dep->de_FileSize, 0, cred); 567 return (error); 568 } 569 570 /* 571 * Move a denode to its correct hash queue after the file it represents has 572 * been moved to a new directory. 573 */ 574 void 575 reinsert(struct denode *dep) 576 { 577 struct vnode *vp; 578 579 /* 580 * Fix up the denode cache. If the denode is for a directory, 581 * there is nothing to do since the hash is based on the starting 582 * cluster of the directory file and that hasn't changed. If for a 583 * file the hash is based on the location of the directory entry, 584 * so we must remove it from the cache and re-enter it with the 585 * hash based on the new location of the directory entry. 586 */ 587 #if 0 588 if (dep->de_Attributes & ATTR_DIRECTORY) 589 return; 590 #endif 591 vp = DETOV(dep); 592 dep->de_inode = (uint64_t)dep->de_pmp->pm_bpcluster * dep->de_dirclust + 593 dep->de_diroffset; 594 vfs_hash_rehash(vp, dep->de_inode); 595 } 596 597 int 598 msdosfs_reclaim(struct vop_reclaim_args *ap) 599 { 600 struct vnode *vp = ap->a_vp; 601 struct denode *dep = VTODE(vp); 602 603 #ifdef MSDOSFS_DEBUG 604 printf("msdosfs_reclaim(): dep %p, file %s, refcnt %ld\n", 605 dep, dep->de_Name, dep->de_refcnt); 606 #endif 607 608 /* 609 * Remove the denode from its hash chain. 610 */ 611 vfs_hash_remove(vp); 612 /* 613 * Purge old data structures associated with the denode. 614 */ 615 #if 0 /* XXX */ 616 dep->de_flag = 0; 617 #endif 618 free(dep, M_MSDOSFSNODE); 619 vp->v_data = NULL; 620 621 return (0); 622 } 623 624 int 625 msdosfs_inactive(struct vop_inactive_args *ap) 626 { 627 struct vnode *vp = ap->a_vp; 628 struct denode *dep = VTODE(vp); 629 int error = 0; 630 631 #ifdef MSDOSFS_DEBUG 632 printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]); 633 #endif 634 635 /* 636 * Ignore denodes related to stale file handles. 637 */ 638 if (dep->de_Name[0] == SLOT_DELETED || dep->de_Name[0] == SLOT_EMPTY) 639 goto out; 640 641 /* 642 * If the file has been deleted and it is on a read/write 643 * filesystem, then truncate the file, and mark the directory slot 644 * as empty. (This may not be necessary for the dos filesystem.) 645 */ 646 #ifdef MSDOSFS_DEBUG 647 printf("msdosfs_inactive(): dep %p, refcnt %ld, mntflag %llx, MNT_RDONLY %llx\n", 648 dep, dep->de_refcnt, (unsigned long long)vp->v_mount->mnt_flag, 649 (unsigned long long)MNT_RDONLY); 650 #endif 651 if (dep->de_refcnt <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 652 error = detrunc(dep, (u_long) 0, 0, NOCRED); 653 dep->de_flag |= DE_UPDATE; 654 dep->de_Name[0] = SLOT_DELETED; 655 } 656 deupdat(dep, 0); 657 658 out: 659 /* 660 * If we are done with the denode, reclaim it 661 * so that it can be reused immediately. 662 */ 663 #ifdef MSDOSFS_DEBUG 664 printf("msdosfs_inactive(): v_usecount %d, de_Name[0] %x\n", 665 vrefcnt(vp), dep->de_Name[0]); 666 #endif 667 if (dep->de_Name[0] == SLOT_DELETED || dep->de_Name[0] == SLOT_EMPTY) 668 vrecycle(vp); 669 return (error); 670 } 671