1 /* $NetBSD: msdosfs_vnops.c,v 1.89 2014/01/23 10:13:56 hannken Exp $ */ 2 3 /*- 4 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 5 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 6 * All rights reserved. 7 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 /* 35 * Written by Paul Popelka (paulp@uts.amdahl.com) 36 * 37 * You can do anything you want with this software, just don't say you wrote 38 * it, and don't remove this notice. 39 * 40 * This software is provided "as is". 41 * 42 * The author supplies this software to be publicly redistributed on the 43 * understanding that the author is not responsible for the correct 44 * functioning of this software in any circumstances and is not liable for 45 * any damages caused by this software. 46 * 47 * October 1992 48 */ 49 50 #include <sys/cdefs.h> 51 __KERNEL_RCSID(0, "$NetBSD: msdosfs_vnops.c,v 1.89 2014/01/23 10:13:56 hannken Exp $"); 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/namei.h> 56 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 57 #include <sys/kernel.h> 58 #include <sys/file.h> /* define FWRITE ... */ 59 #include <sys/stat.h> 60 #include <sys/buf.h> 61 #include <sys/proc.h> 62 #include <sys/mount.h> 63 #include <sys/fstrans.h> 64 #include <sys/vnode.h> 65 #include <sys/signalvar.h> 66 #include <sys/malloc.h> 67 #include <sys/dirent.h> 68 #include <sys/lockf.h> 69 #include <sys/kauth.h> 70 71 #include <miscfs/genfs/genfs.h> 72 #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 73 74 #include <uvm/uvm_extern.h> 75 76 #include <fs/msdosfs/bpb.h> 77 #include <fs/msdosfs/direntry.h> 78 #include <fs/msdosfs/denode.h> 79 #include <fs/msdosfs/msdosfsmount.h> 80 #include <fs/msdosfs/fat.h> 81 82 /* 83 * Some general notes: 84 * 85 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 86 * read/written using the vnode for the filesystem. Blocks that represent 87 * the contents of a file are read/written using the vnode for the file 88 * (including directories when they are read/written as files). This 89 * presents problems for the dos filesystem because data that should be in 90 * an inode (if dos had them) resides in the directory itself. Since we 91 * must update directory entries without the benefit of having the vnode 92 * for the directory we must use the vnode for the filesystem. This means 93 * that when a directory is actually read/written (via read, write, or 94 * readdir, or seek) we must use the vnode for the filesystem instead of 95 * the vnode for the directory as would happen in ufs. This is to insure we 96 * retrieve the correct block from the buffer cache since the hash value is 97 * based upon the vnode address and the desired block number. 98 */ 99 100 /* 101 * Create a regular file. On entry the directory to contain the file being 102 * created is locked. We must release before we return. 103 */ 104 int 105 msdosfs_create(void *v) 106 { 107 struct vop_create_v3_args /* { 108 struct vnode *a_dvp; 109 struct vnode **a_vpp; 110 struct componentname *a_cnp; 111 struct vattr *a_vap; 112 } */ *ap = v; 113 struct componentname *cnp = ap->a_cnp; 114 struct denode ndirent; 115 struct denode *dep; 116 struct denode *pdep = VTODE(ap->a_dvp); 117 int error; 118 119 #ifdef MSDOSFS_DEBUG 120 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 121 #endif 122 123 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 124 /* 125 * If this is the root directory and there is no space left we 126 * can't do anything. This is because the root directory can not 127 * change size. 128 */ 129 if (pdep->de_StartCluster == MSDOSFSROOT 130 && pdep->de_fndoffset >= pdep->de_FileSize) { 131 error = ENOSPC; 132 goto bad; 133 } 134 135 /* 136 * Create a directory entry for the file, then call createde() to 137 * have it installed. NOTE: DOS files are always executable. We 138 * use the absence of the owner write bit to make the file 139 * readonly. 140 */ 141 memset(&ndirent, 0, sizeof(ndirent)); 142 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 143 goto bad; 144 145 ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ? 146 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 147 ndirent.de_StartCluster = 0; 148 ndirent.de_FileSize = 0; 149 ndirent.de_dev = pdep->de_dev; 150 ndirent.de_devvp = pdep->de_devvp; 151 ndirent.de_pmp = pdep->de_pmp; 152 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 153 DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff); 154 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 155 goto bad; 156 fstrans_done(ap->a_dvp->v_mount); 157 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 158 *ap->a_vpp = DETOV(dep); 159 return (0); 160 161 bad: 162 fstrans_done(ap->a_dvp->v_mount); 163 return (error); 164 } 165 166 int 167 msdosfs_close(void *v) 168 { 169 struct vop_close_args /* { 170 struct vnode *a_vp; 171 int a_fflag; 172 kauth_cred_t a_cred; 173 } */ *ap = v; 174 struct vnode *vp = ap->a_vp; 175 struct denode *dep = VTODE(vp); 176 177 fstrans_start(vp->v_mount, FSTRANS_SHARED); 178 mutex_enter(vp->v_interlock); 179 if (vp->v_usecount > 1) 180 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 181 mutex_exit(vp->v_interlock); 182 fstrans_done(vp->v_mount); 183 return (0); 184 } 185 186 static int 187 msdosfs_check_possible(struct vnode *vp, struct denode *dep, mode_t mode) 188 { 189 190 /* 191 * Disallow write attempts on read-only file systems; 192 * unless the file is a socket, fifo, or a block or 193 * character device resident on the file system. 194 */ 195 if (mode & VWRITE) { 196 switch (vp->v_type) { 197 case VDIR: 198 case VLNK: 199 case VREG: 200 if (vp->v_mount->mnt_flag & MNT_RDONLY) 201 return (EROFS); 202 default: 203 break; 204 } 205 } 206 207 return 0; 208 } 209 210 static int 211 msdosfs_check_permitted(struct vnode *vp, struct denode *dep, mode_t mode, 212 kauth_cred_t cred) 213 { 214 struct msdosfsmount *pmp = dep->de_pmp; 215 mode_t file_mode; 216 217 if ((dep->de_Attributes & ATTR_READONLY) == 0) 218 file_mode = S_IRWXU|S_IRWXG|S_IRWXO; 219 else 220 file_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 221 222 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 223 224 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 225 vp->v_type, file_mode), vp, NULL, genfs_can_access(vp->v_type, 226 file_mode, pmp->pm_uid, pmp->pm_gid, mode, cred)); 227 } 228 229 int 230 msdosfs_access(void *v) 231 { 232 struct vop_access_args /* { 233 struct vnode *a_vp; 234 int a_mode; 235 kauth_cred_t a_cred; 236 } */ *ap = v; 237 struct vnode *vp = ap->a_vp; 238 struct denode *dep = VTODE(vp); 239 int error; 240 241 error = msdosfs_check_possible(vp, dep, ap->a_mode); 242 if (error) 243 return error; 244 245 error = msdosfs_check_permitted(vp, dep, ap->a_mode, ap->a_cred); 246 247 return error; 248 } 249 250 int 251 msdosfs_getattr(void *v) 252 { 253 struct vop_getattr_args /* { 254 struct vnode *a_vp; 255 struct vattr *a_vap; 256 kauth_cred_t a_cred; 257 } */ *ap = v; 258 struct denode *dep = VTODE(ap->a_vp); 259 struct msdosfsmount *pmp = dep->de_pmp; 260 struct vattr *vap = ap->a_vap; 261 mode_t mode; 262 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 263 ino_t fileid; 264 265 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 266 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 267 vap->va_fsid = dep->de_dev; 268 /* 269 * The following computation of the fileid must be the same as that 270 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 271 * doesn't work. 272 */ 273 if (dep->de_Attributes & ATTR_DIRECTORY) { 274 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 275 if (dep->de_StartCluster == MSDOSFSROOT) 276 fileid = 1; 277 } else { 278 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 279 if (dep->de_dirclust == MSDOSFSROOT) 280 fileid = roottobn(pmp, 0) * dirsperblk; 281 fileid += dep->de_diroffset / sizeof(struct direntry); 282 } 283 vap->va_fileid = fileid; 284 if ((dep->de_Attributes & ATTR_READONLY) == 0) 285 mode = S_IRWXU|S_IRWXG|S_IRWXO; 286 else 287 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 288 vap->va_mode = 289 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 290 vap->va_uid = pmp->pm_uid; 291 vap->va_gid = pmp->pm_gid; 292 vap->va_nlink = 1; 293 vap->va_rdev = 0; 294 vap->va_size = ap->a_vp->v_size; 295 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 296 &vap->va_mtime); 297 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 298 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 299 &vap->va_atime); 300 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 301 pmp->pm_gmtoff, &vap->va_ctime); 302 } else { 303 vap->va_atime = vap->va_mtime; 304 vap->va_ctime = vap->va_mtime; 305 } 306 vap->va_flags = 0; 307 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) { 308 vap->va_flags |= SF_ARCHIVED; 309 vap->va_mode |= S_ARCH1; 310 } 311 vap->va_gen = 0; 312 vap->va_blocksize = pmp->pm_bpcluster; 313 vap->va_bytes = 314 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 315 vap->va_type = ap->a_vp->v_type; 316 fstrans_done(ap->a_vp->v_mount); 317 return (0); 318 } 319 320 int 321 msdosfs_setattr(void *v) 322 { 323 struct vop_setattr_args /* { 324 struct vnode *a_vp; 325 struct vattr *a_vap; 326 kauth_cred_t a_cred; 327 } */ *ap = v; 328 int error = 0, de_changed = 0; 329 struct denode *dep = VTODE(ap->a_vp); 330 struct msdosfsmount *pmp = dep->de_pmp; 331 struct vnode *vp = ap->a_vp; 332 struct vattr *vap = ap->a_vap; 333 kauth_cred_t cred = ap->a_cred; 334 335 #ifdef MSDOSFS_DEBUG 336 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 337 ap->a_vp, vap, cred); 338 #endif 339 /* 340 * Note we silently ignore uid or gid changes. 341 */ 342 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 343 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 344 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 345 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 346 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 347 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 348 #ifdef MSDOSFS_DEBUG 349 printf("msdosfs_setattr(): returning EINVAL\n"); 350 printf(" va_type %d, va_nlink %x, va_fsid %"PRIx64", va_fileid %llx\n", 351 vap->va_type, vap->va_nlink, vap->va_fsid, 352 (unsigned long long)vap->va_fileid); 353 printf(" va_blocksize %lx, va_rdev %"PRIx64", va_bytes %"PRIx64", va_gen %lx\n", 354 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 355 #endif 356 return (EINVAL); 357 } 358 /* 359 * Silently ignore attributes modifications on directories. 360 */ 361 if (ap->a_vp->v_type == VDIR) 362 return 0; 363 364 fstrans_start(vp->v_mount, FSTRANS_SHARED); 365 if (vap->va_size != VNOVAL) { 366 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 367 error = EROFS; 368 goto bad; 369 } 370 error = detrunc(dep, (u_long)vap->va_size, 0, cred); 371 if (error) 372 goto bad; 373 de_changed = 1; 374 } 375 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 376 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 377 error = EROFS; 378 goto bad; 379 } 380 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, 381 ap->a_vp, NULL, genfs_can_chtimes(ap->a_vp, vap->va_vaflags, 382 pmp->pm_uid, cred)); 383 if (error) 384 goto bad; 385 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 386 vap->va_atime.tv_sec != VNOVAL) 387 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 388 if (vap->va_mtime.tv_sec != VNOVAL) 389 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 390 dep->de_Attributes |= ATTR_ARCHIVE; 391 dep->de_flag |= DE_MODIFIED; 392 de_changed = 1; 393 } 394 /* 395 * DOS files only have the ability to have their writability 396 * attribute set, so we use the owner write bit to set the readonly 397 * attribute. 398 */ 399 if (vap->va_mode != (mode_t)VNOVAL) { 400 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 401 error = EROFS; 402 goto bad; 403 } 404 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 405 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 406 if (error) 407 goto bad; 408 /* We ignore the read and execute bits. */ 409 if (vap->va_mode & S_IWUSR) 410 dep->de_Attributes &= ~ATTR_READONLY; 411 else 412 dep->de_Attributes |= ATTR_READONLY; 413 dep->de_flag |= DE_MODIFIED; 414 de_changed = 1; 415 } 416 /* 417 * Allow the `archived' bit to be toggled. 418 */ 419 if (vap->va_flags != VNOVAL) { 420 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 421 error = EROFS; 422 goto bad; 423 } 424 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 425 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 426 if (error) 427 goto bad; 428 if (vap->va_flags & SF_ARCHIVED) 429 dep->de_Attributes &= ~ATTR_ARCHIVE; 430 else 431 dep->de_Attributes |= ATTR_ARCHIVE; 432 dep->de_flag |= DE_MODIFIED; 433 de_changed = 1; 434 } 435 436 if (de_changed) { 437 VN_KNOTE(vp, NOTE_ATTRIB); 438 error = deupdat(dep, 1); 439 if (error) 440 goto bad; 441 } 442 443 bad: 444 fstrans_done(vp->v_mount); 445 return error; 446 } 447 448 int 449 msdosfs_read(void *v) 450 { 451 struct vop_read_args /* { 452 struct vnode *a_vp; 453 struct uio *a_uio; 454 int a_ioflag; 455 kauth_cred_t a_cred; 456 } */ *ap = v; 457 int error = 0; 458 int64_t diff; 459 int blsize; 460 long n; 461 long on; 462 daddr_t lbn; 463 vsize_t bytelen; 464 struct buf *bp; 465 struct vnode *vp = ap->a_vp; 466 struct denode *dep = VTODE(vp); 467 struct msdosfsmount *pmp = dep->de_pmp; 468 struct uio *uio = ap->a_uio; 469 470 /* 471 * If they didn't ask for any data, then we are done. 472 */ 473 474 if (uio->uio_resid == 0) 475 return (0); 476 if (uio->uio_offset < 0) 477 return (EINVAL); 478 if (uio->uio_offset >= dep->de_FileSize) 479 return (0); 480 481 fstrans_start(vp->v_mount, FSTRANS_SHARED); 482 if (vp->v_type == VREG) { 483 const int advice = IO_ADV_DECODE(ap->a_ioflag); 484 485 while (uio->uio_resid > 0) { 486 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 487 uio->uio_resid); 488 489 if (bytelen == 0) 490 break; 491 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 492 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 493 if (error) 494 break; 495 } 496 dep->de_flag |= DE_ACCESS; 497 goto out; 498 } 499 500 /* this loop is only for directories now */ 501 do { 502 lbn = de_cluster(pmp, uio->uio_offset); 503 on = uio->uio_offset & pmp->pm_crbomask; 504 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 505 if (uio->uio_offset >= dep->de_FileSize) { 506 fstrans_done(vp->v_mount); 507 return (0); 508 } 509 /* file size (and hence diff) may be up to 4GB */ 510 diff = dep->de_FileSize - uio->uio_offset; 511 if (diff < n) 512 n = (long) diff; 513 514 /* convert cluster # to sector # */ 515 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 516 if (error) 517 goto bad; 518 519 /* 520 * If we are operating on a directory file then be sure to 521 * do i/o with the vnode for the filesystem instead of the 522 * vnode for the directory. 523 */ 524 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 525 NOCRED, 0, &bp); 526 if (error) { 527 goto bad; 528 } 529 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 530 error = uiomove((char *)bp->b_data + on, (int) n, uio); 531 brelse(bp, 0); 532 } while (error == 0 && uio->uio_resid > 0 && n != 0); 533 534 out: 535 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 536 error = deupdat(dep, 1); 537 bad: 538 fstrans_done(vp->v_mount); 539 return (error); 540 } 541 542 /* 543 * Write data to a file or directory. 544 */ 545 int 546 msdosfs_write(void *v) 547 { 548 struct vop_write_args /* { 549 struct vnode *a_vp; 550 struct uio *a_uio; 551 int a_ioflag; 552 kauth_cred_t a_cred; 553 } */ *ap = v; 554 int resid, extended = 0; 555 int error = 0; 556 int ioflag = ap->a_ioflag; 557 u_long osize; 558 u_long count; 559 vsize_t bytelen; 560 off_t oldoff; 561 size_t rem; 562 struct uio *uio = ap->a_uio; 563 struct vnode *vp = ap->a_vp; 564 struct denode *dep = VTODE(vp); 565 struct msdosfsmount *pmp = dep->de_pmp; 566 kauth_cred_t cred = ap->a_cred; 567 bool async; 568 569 #ifdef MSDOSFS_DEBUG 570 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 571 vp, uio, ioflag, cred); 572 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 573 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 574 #endif 575 576 switch (vp->v_type) { 577 case VREG: 578 if (ioflag & IO_APPEND) 579 uio->uio_offset = dep->de_FileSize; 580 break; 581 case VDIR: 582 return EISDIR; 583 default: 584 panic("msdosfs_write(): bad file type"); 585 } 586 587 if (uio->uio_offset < 0) 588 return (EINVAL); 589 590 if (uio->uio_resid == 0) 591 return (0); 592 593 /* Don't bother to try to write files larger than the fs limit */ 594 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 595 return (EFBIG); 596 597 fstrans_start(vp->v_mount, FSTRANS_SHARED); 598 /* 599 * If the offset we are starting the write at is beyond the end of 600 * the file, then they've done a seek. Unix filesystems allow 601 * files with holes in them, DOS doesn't so we must fill the hole 602 * with zeroed blocks. 603 */ 604 if (uio->uio_offset > dep->de_FileSize) { 605 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) { 606 fstrans_done(vp->v_mount); 607 return (error); 608 } 609 } 610 611 /* 612 * Remember some values in case the write fails. 613 */ 614 async = vp->v_mount->mnt_flag & MNT_ASYNC; 615 resid = uio->uio_resid; 616 osize = dep->de_FileSize; 617 618 /* 619 * If we write beyond the end of the file, extend it to its ultimate 620 * size ahead of the time to hopefully get a contiguous area. 621 */ 622 if (uio->uio_offset + resid > osize) { 623 count = de_clcount(pmp, uio->uio_offset + resid) - 624 de_clcount(pmp, osize); 625 if ((error = extendfile(dep, count, NULL, NULL, 0))) 626 goto errexit; 627 628 dep->de_FileSize = uio->uio_offset + resid; 629 /* hint uvm to not read in extended part */ 630 uvm_vnp_setwritesize(vp, dep->de_FileSize); 631 /* zero out the remainder of the last page */ 632 rem = round_page(dep->de_FileSize) - dep->de_FileSize; 633 if (rem > 0) 634 ubc_zerorange(&vp->v_uobj, (off_t)dep->de_FileSize, 635 rem, UBC_UNMAP_FLAG(vp)); 636 extended = 1; 637 } 638 639 do { 640 oldoff = uio->uio_offset; 641 bytelen = uio->uio_resid; 642 643 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 644 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 645 if (error) 646 break; 647 648 /* 649 * flush what we just wrote if necessary. 650 * XXXUBC simplistic async flushing. 651 */ 652 653 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 654 mutex_enter(vp->v_interlock); 655 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 656 (uio->uio_offset >> 16) << 16, 657 PGO_CLEANIT | PGO_LAZY); 658 } 659 } while (error == 0 && uio->uio_resid > 0); 660 661 /* set final size */ 662 uvm_vnp_setsize(vp, dep->de_FileSize); 663 if (error == 0 && ioflag & IO_SYNC) { 664 mutex_enter(vp->v_interlock); 665 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 666 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 667 } 668 dep->de_flag |= DE_UPDATE; 669 670 /* 671 * If the write failed and they want us to, truncate the file back 672 * to the size it was before the write was attempted. 673 */ 674 errexit: 675 if (resid > uio->uio_resid) 676 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 677 if (error) { 678 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 679 uio->uio_offset -= resid - uio->uio_resid; 680 uio->uio_resid = resid; 681 } else if ((ioflag & IO_SYNC) == IO_SYNC) 682 error = deupdat(dep, 1); 683 fstrans_done(vp->v_mount); 684 KASSERT(vp->v_size == dep->de_FileSize); 685 return (error); 686 } 687 688 int 689 msdosfs_update(struct vnode *vp, const struct timespec *acc, 690 const struct timespec *mod, int flags) 691 { 692 struct buf *bp; 693 struct direntry *dirp; 694 struct denode *dep; 695 int error; 696 697 if (vp->v_mount->mnt_flag & MNT_RDONLY) 698 return (0); 699 dep = VTODE(vp); 700 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 701 if ((dep->de_flag & DE_MODIFIED) == 0) 702 return (0); 703 dep->de_flag &= ~DE_MODIFIED; 704 if (dep->de_Attributes & ATTR_DIRECTORY) 705 return (0); 706 if (dep->de_refcnt <= 0) 707 return (0); 708 error = readde(dep, &bp, &dirp); 709 if (error) 710 return (error); 711 DE_EXTERNALIZE(dirp, dep); 712 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 713 return (bwrite(bp)); 714 else { 715 bdwrite(bp); 716 return (0); 717 } 718 } 719 720 /* 721 * Flush the blocks of a file to disk. 722 * 723 * This function is worthless for vnodes that represent directories. Maybe we 724 * could just do a sync if they try an fsync on a directory file. 725 */ 726 int 727 msdosfs_remove(void *v) 728 { 729 struct vop_remove_args /* { 730 struct vnode *a_dvp; 731 struct vnode *a_vp; 732 struct componentname *a_cnp; 733 } */ *ap = v; 734 struct denode *dep = VTODE(ap->a_vp); 735 struct denode *ddep = VTODE(ap->a_dvp); 736 int error; 737 738 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 739 if (ap->a_vp->v_type == VDIR) 740 error = EPERM; 741 else 742 error = removede(ddep, dep); 743 #ifdef MSDOSFS_DEBUG 744 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 745 dep, ap->a_vp->v_usecount); 746 #endif 747 VN_KNOTE(ap->a_vp, NOTE_DELETE); 748 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 749 if (ddep == dep) 750 vrele(ap->a_vp); 751 else 752 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 753 * via vrele() */ 754 vput(ap->a_dvp); 755 fstrans_done(ap->a_dvp->v_mount); 756 return (error); 757 } 758 759 /* 760 * Renames on files require moving the denode to a new hash queue since the 761 * denode's location is used to compute which hash queue to put the file 762 * in. Unless it is a rename in place. For example "mv a b". 763 * 764 * What follows is the basic algorithm: 765 * 766 * if (file move) { 767 * if (dest file exists) { 768 * remove dest file 769 * } 770 * if (dest and src in same directory) { 771 * rewrite name in existing directory slot 772 * } else { 773 * write new entry in dest directory 774 * update offset and dirclust in denode 775 * move denode to new hash chain 776 * clear old directory entry 777 * } 778 * } else { 779 * directory move 780 * if (dest directory exists) { 781 * if (dest is not empty) { 782 * return ENOTEMPTY 783 * } 784 * remove dest directory 785 * } 786 * if (dest and src in same directory) { 787 * rewrite name in existing entry 788 * } else { 789 * be sure dest is not a child of src directory 790 * write entry in dest directory 791 * update "." and ".." in moved directory 792 * update offset and dirclust in denode 793 * move denode to new hash chain 794 * clear old directory entry for moved directory 795 * } 796 * } 797 * 798 * On entry: 799 * source's parent directory is unlocked 800 * source file or directory is unlocked 801 * destination's parent directory is locked 802 * destination file or directory is locked if it exists 803 * 804 * On exit: 805 * all denodes should be released 806 * 807 * Notes: 808 * I'm not sure how the memory containing the pathnames pointed at by the 809 * componentname structures is freed, there may be some memory bleeding 810 * for each rename done. 811 * 812 * --More-- Notes: 813 * This routine needs help. badly. 814 */ 815 int 816 msdosfs_rename(void *v) 817 { 818 struct vop_rename_args /* { 819 struct vnode *a_fdvp; 820 struct vnode *a_fvp; 821 struct componentname *a_fcnp; 822 struct vnode *a_tdvp; 823 struct vnode *a_tvp; 824 struct componentname *a_tcnp; 825 } */ *ap = v; 826 struct vnode *tvp = ap->a_tvp; 827 struct vnode *tdvp = ap->a_tdvp; 828 struct vnode *fvp = ap->a_fvp; 829 struct vnode *fdvp = ap->a_fdvp; 830 struct mount *mp = fdvp->v_mount; 831 struct componentname *tcnp = ap->a_tcnp; 832 struct componentname *fcnp = ap->a_fcnp; 833 struct denode *ip, *xp, *dp, *zp; 834 u_char toname[12], oldname[12]; 835 u_long from_diroffset, to_diroffset; 836 u_char to_count; 837 int doingdirectory = 0, newparent = 0; 838 int error; 839 u_long cn; 840 daddr_t bn; 841 struct msdosfsmount *pmp; 842 struct direntry *dotdotp; 843 struct buf *bp; 844 845 pmp = VFSTOMSDOSFS(fdvp->v_mount); 846 847 /* 848 * Check for cross-device rename. 849 */ 850 if ((fvp->v_mount != tdvp->v_mount) || 851 (tvp && (fvp->v_mount != tvp->v_mount))) { 852 error = EXDEV; 853 abortit: 854 VOP_ABORTOP(tdvp, tcnp); 855 if (tdvp == tvp) 856 vrele(tdvp); 857 else 858 vput(tdvp); 859 if (tvp) 860 vput(tvp); 861 VOP_ABORTOP(fdvp, fcnp); 862 vrele(fdvp); 863 vrele(fvp); 864 return (error); 865 } 866 867 /* 868 * If source and dest are the same, do nothing. 869 */ 870 if (tvp == fvp) { 871 error = 0; 872 goto abortit; 873 } 874 875 /* 876 * XXX: This can deadlock since we hold tdvp/tvp locked. 877 * But I'm not going to fix it now. 878 */ 879 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 880 goto abortit; 881 dp = VTODE(fdvp); 882 ip = VTODE(fvp); 883 884 /* 885 * Be sure we are not renaming ".", "..", or an alias of ".". This 886 * leads to a crippled directory tree. It's pretty tough to do a 887 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 888 * doesn't work if the ".." entry is missing. 889 */ 890 if (ip->de_Attributes & ATTR_DIRECTORY) { 891 /* 892 * Avoid ".", "..", and aliases of "." for obvious reasons. 893 */ 894 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 895 dp == ip || 896 (fcnp->cn_flags & ISDOTDOT) || 897 (tcnp->cn_flags & ISDOTDOT) || 898 (ip->de_flag & DE_RENAME)) { 899 VOP_UNLOCK(fvp); 900 error = EINVAL; 901 goto abortit; 902 } 903 ip->de_flag |= DE_RENAME; 904 doingdirectory++; 905 } 906 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 907 908 fstrans_start(mp, FSTRANS_SHARED); 909 /* 910 * When the target exists, both the directory 911 * and target vnodes are returned locked. 912 */ 913 dp = VTODE(tdvp); 914 xp = tvp ? VTODE(tvp) : NULL; 915 /* 916 * Remember direntry place to use for destination 917 */ 918 to_diroffset = dp->de_fndoffset; 919 to_count = dp->de_fndcnt; 920 921 /* 922 * If ".." must be changed (ie the directory gets a new 923 * parent) then the source directory must not be in the 924 * directory hierarchy above the target, as this would 925 * orphan everything below the source directory. Also 926 * the user must have write permission in the source so 927 * as to be able to change "..". We must repeat the call 928 * to namei, as the parent directory is unlocked by the 929 * call to doscheckpath(). 930 */ 931 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 932 VOP_UNLOCK(fvp); 933 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 934 newparent = 1; 935 936 if (doingdirectory && newparent) { 937 if (error) /* write access check above */ 938 goto tdvpbad; 939 if (xp != NULL) 940 vput(tvp); 941 tvp = NULL; 942 /* 943 * doscheckpath() vput()'s tdvp (dp == VTODE(tdvp)), 944 * so we have to get an extra ref to it first, and 945 * because it's been unlocked we need to do a relookup 946 * afterwards in case tvp has changed. 947 */ 948 vref(tdvp); 949 if ((error = doscheckpath(ip, dp)) != 0) 950 goto bad; 951 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 952 if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) { 953 VOP_UNLOCK(tdvp); 954 goto bad; 955 } 956 dp = VTODE(tdvp); 957 xp = tvp ? VTODE(tvp) : NULL; 958 } 959 960 if (xp != NULL) { 961 /* 962 * Target must be empty if a directory and have no links 963 * to it. Also, ensure source and target are compatible 964 * (both directories, or both not directories). 965 */ 966 if (xp->de_Attributes & ATTR_DIRECTORY) { 967 if (!dosdirempty(xp)) { 968 error = ENOTEMPTY; 969 goto tdvpbad; 970 } 971 if (!doingdirectory) { 972 error = ENOTDIR; 973 goto tdvpbad; 974 } 975 } else if (doingdirectory) { 976 error = EISDIR; 977 goto tdvpbad; 978 } 979 if ((error = removede(dp, xp)) != 0) 980 goto tdvpbad; 981 VN_KNOTE(tdvp, NOTE_WRITE); 982 VN_KNOTE(tvp, NOTE_DELETE); 983 cache_purge(tvp); 984 vput(tvp); 985 tvp = NULL; 986 xp = NULL; 987 } 988 989 /* 990 * Convert the filename in tcnp into a dos filename. We copy this 991 * into the denode and directory entry for the destination 992 * file/directory. 993 */ 994 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) { 995 fstrans_done(mp); 996 goto abortit; 997 } 998 999 /* 1000 * Since from wasn't locked at various places above, 1001 * have to do a relookup here. 1002 */ 1003 fcnp->cn_flags &= ~MODMASK; 1004 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1005 VOP_UNLOCK(tdvp); 1006 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1007 if ((error = relookup(fdvp, &fvp, fcnp, 0))) { 1008 VOP_UNLOCK(fdvp); 1009 vrele(ap->a_fvp); 1010 vrele(tdvp); 1011 fstrans_done(mp); 1012 return (error); 1013 } 1014 if (fvp == NULL) { 1015 /* 1016 * From name has disappeared. 1017 */ 1018 if (doingdirectory) 1019 panic("rename: lost dir entry"); 1020 vput(fdvp); 1021 vrele(ap->a_fvp); 1022 vrele(tdvp); 1023 fstrans_done(mp); 1024 return 0; 1025 } 1026 VOP_UNLOCK(fdvp); 1027 xp = VTODE(fvp); 1028 zp = VTODE(fdvp); 1029 from_diroffset = zp->de_fndoffset; 1030 1031 /* 1032 * Ensure that the directory entry still exists and has not 1033 * changed till now. If the source is a file the entry may 1034 * have been unlinked or renamed. In either case there is 1035 * no further work to be done. If the source is a directory 1036 * then it cannot have been rmdir'ed or renamed; this is 1037 * prohibited by the DE_RENAME flag. 1038 */ 1039 if (xp != ip) { 1040 if (doingdirectory) 1041 panic("rename: lost dir entry"); 1042 vrele(ap->a_fvp); 1043 xp = NULL; 1044 } else { 1045 vrele(fvp); 1046 xp = NULL; 1047 1048 /* 1049 * First write a new entry in the destination 1050 * directory and mark the entry in the source directory 1051 * as deleted. Then move the denode to the correct hash 1052 * chain for its new location in the filesystem. And, if 1053 * we moved a directory, then update its .. entry to point 1054 * to the new parent directory. 1055 */ 1056 memcpy(oldname, ip->de_Name, 11); 1057 memcpy(ip->de_Name, toname, 11); /* update denode */ 1058 dp->de_fndoffset = to_diroffset; 1059 dp->de_fndcnt = to_count; 1060 error = createde(ip, dp, (struct denode **)0, tcnp); 1061 if (error) { 1062 memcpy(ip->de_Name, oldname, 11); 1063 VOP_UNLOCK(fvp); 1064 goto bad; 1065 } 1066 ip->de_refcnt++; 1067 zp->de_fndoffset = from_diroffset; 1068 if ((error = removede(zp, ip)) != 0) { 1069 /* XXX should really panic here, fs is corrupt */ 1070 VOP_UNLOCK(fvp); 1071 goto bad; 1072 } 1073 cache_purge(fvp); 1074 if (!doingdirectory) { 1075 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1076 &ip->de_dirclust, 0); 1077 if (error) { 1078 /* XXX should really panic here, fs is corrupt */ 1079 VOP_UNLOCK(fvp); 1080 goto bad; 1081 } 1082 ip->de_diroffset = to_diroffset; 1083 if (ip->de_dirclust != MSDOSFSROOT) 1084 ip->de_diroffset &= pmp->pm_crbomask; 1085 } 1086 reinsert(ip); 1087 } 1088 1089 /* 1090 * If we moved a directory to a new parent directory, then we must 1091 * fixup the ".." entry in the moved directory. 1092 */ 1093 if (doingdirectory && newparent) { 1094 cn = ip->de_StartCluster; 1095 if (cn == MSDOSFSROOT) { 1096 /* this should never happen */ 1097 panic("msdosfs_rename: updating .. in root directory?"); 1098 } else 1099 bn = cntobn(pmp, cn); 1100 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1101 pmp->pm_bpcluster, NOCRED, B_MODIFY, &bp); 1102 if (error) { 1103 /* XXX should really panic here, fs is corrupt */ 1104 VOP_UNLOCK(fvp); 1105 goto bad; 1106 } 1107 dotdotp = (struct direntry *)bp->b_data + 1; 1108 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1109 if (FAT32(pmp)) { 1110 putushort(dotdotp->deHighClust, 1111 dp->de_StartCluster >> 16); 1112 } else { 1113 putushort(dotdotp->deHighClust, 0); 1114 } 1115 if ((error = bwrite(bp)) != 0) { 1116 /* XXX should really panic here, fs is corrupt */ 1117 VOP_UNLOCK(fvp); 1118 goto bad; 1119 } 1120 } 1121 1122 VN_KNOTE(fvp, NOTE_RENAME); 1123 VOP_UNLOCK(fvp); 1124 bad: 1125 if (tvp) 1126 vput(tvp); 1127 vrele(tdvp); 1128 ip->de_flag &= ~DE_RENAME; 1129 vrele(fdvp); 1130 vrele(fvp); 1131 fstrans_done(mp); 1132 return (error); 1133 1134 /* XXX: uuuh */ 1135 tdvpbad: 1136 VOP_UNLOCK(tdvp); 1137 goto bad; 1138 } 1139 1140 static const struct { 1141 struct direntry dot; 1142 struct direntry dotdot; 1143 } dosdirtemplate = { 1144 { ". ", " ", /* the . entry */ 1145 ATTR_DIRECTORY, /* file attribute */ 1146 0, /* reserved */ 1147 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1148 { 0, 0 }, /* access date */ 1149 { 0, 0 }, /* high bits of start cluster */ 1150 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1151 { 0, 0 }, /* startcluster */ 1152 { 0, 0, 0, 0 } /* filesize */ 1153 }, 1154 { ".. ", " ", /* the .. entry */ 1155 ATTR_DIRECTORY, /* file attribute */ 1156 0, /* reserved */ 1157 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1158 { 0, 0 }, /* access date */ 1159 { 0, 0 }, /* high bits of start cluster */ 1160 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1161 { 0, 0 }, /* startcluster */ 1162 { 0, 0, 0, 0 } /* filesize */ 1163 } 1164 }; 1165 1166 int 1167 msdosfs_mkdir(void *v) 1168 { 1169 struct vop_mkdir_v3_args /* { 1170 struct vnode *a_dvp; 1171 struvt vnode **a_vpp; 1172 struvt componentname *a_cnp; 1173 struct vattr *a_vap; 1174 } */ *ap = v; 1175 struct componentname *cnp = ap->a_cnp; 1176 struct denode ndirent; 1177 struct denode *dep; 1178 struct denode *pdep = VTODE(ap->a_dvp); 1179 int error; 1180 int bn; 1181 u_long newcluster, pcl; 1182 daddr_t lbn; 1183 struct direntry *denp; 1184 struct msdosfsmount *pmp = pdep->de_pmp; 1185 struct buf *bp; 1186 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1187 1188 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1189 /* 1190 * If this is the root directory and there is no space left we 1191 * can't do anything. This is because the root directory can not 1192 * change size. 1193 */ 1194 if (pdep->de_StartCluster == MSDOSFSROOT 1195 && pdep->de_fndoffset >= pdep->de_FileSize) { 1196 error = ENOSPC; 1197 goto bad2; 1198 } 1199 1200 /* 1201 * Allocate a cluster to hold the about to be created directory. 1202 */ 1203 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1204 if (error) 1205 goto bad2; 1206 1207 memset(&ndirent, 0, sizeof(ndirent)); 1208 ndirent.de_pmp = pmp; 1209 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1210 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1211 1212 /* 1213 * Now fill the cluster with the "." and ".." entries. And write 1214 * the cluster to disk. This way it is there for the parent 1215 * directory to be pointing at if there were a crash. 1216 */ 1217 bn = cntobn(pmp, newcluster); 1218 lbn = de_bn2kb(pmp, bn); 1219 /* always succeeds */ 1220 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1221 memset(bp->b_data, 0, pmp->pm_bpcluster); 1222 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1223 denp = (struct direntry *)bp->b_data; 1224 putushort(denp[0].deStartCluster, newcluster); 1225 putushort(denp[0].deCDate, ndirent.de_CDate); 1226 putushort(denp[0].deCTime, ndirent.de_CTime); 1227 denp[0].deCHundredth = ndirent.de_CHun; 1228 putushort(denp[0].deADate, ndirent.de_ADate); 1229 putushort(denp[0].deMDate, ndirent.de_MDate); 1230 putushort(denp[0].deMTime, ndirent.de_MTime); 1231 pcl = pdep->de_StartCluster; 1232 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1233 pcl = 0; 1234 putushort(denp[1].deStartCluster, pcl); 1235 putushort(denp[1].deCDate, ndirent.de_CDate); 1236 putushort(denp[1].deCTime, ndirent.de_CTime); 1237 denp[1].deCHundredth = ndirent.de_CHun; 1238 putushort(denp[1].deADate, ndirent.de_ADate); 1239 putushort(denp[1].deMDate, ndirent.de_MDate); 1240 putushort(denp[1].deMTime, ndirent.de_MTime); 1241 if (FAT32(pmp)) { 1242 putushort(denp[0].deHighClust, newcluster >> 16); 1243 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1244 } else { 1245 putushort(denp[0].deHighClust, 0); 1246 putushort(denp[1].deHighClust, 0); 1247 } 1248 1249 if (async) 1250 bdwrite(bp); 1251 else if ((error = bwrite(bp)) != 0) 1252 goto bad; 1253 1254 /* 1255 * Now build up a directory entry pointing to the newly allocated 1256 * cluster. This will be written to an empty slot in the parent 1257 * directory. 1258 */ 1259 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1260 goto bad; 1261 1262 ndirent.de_Attributes = ATTR_DIRECTORY; 1263 ndirent.de_StartCluster = newcluster; 1264 ndirent.de_FileSize = 0; 1265 ndirent.de_dev = pdep->de_dev; 1266 ndirent.de_devvp = pdep->de_devvp; 1267 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1268 goto bad; 1269 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1270 *ap->a_vpp = DETOV(dep); 1271 fstrans_done(ap->a_dvp->v_mount); 1272 return (0); 1273 1274 bad: 1275 clusterfree(pmp, newcluster, NULL); 1276 bad2: 1277 fstrans_done(ap->a_dvp->v_mount); 1278 return (error); 1279 } 1280 1281 int 1282 msdosfs_rmdir(void *v) 1283 { 1284 struct vop_rmdir_args /* { 1285 struct vnode *a_dvp; 1286 struct vnode *a_vp; 1287 struct componentname *a_cnp; 1288 } */ *ap = v; 1289 struct vnode *vp = ap->a_vp; 1290 struct vnode *dvp = ap->a_dvp; 1291 struct mount *mp = dvp->v_mount; 1292 struct componentname *cnp = ap->a_cnp; 1293 struct denode *ip, *dp; 1294 int error; 1295 1296 ip = VTODE(vp); 1297 dp = VTODE(dvp); 1298 /* 1299 * No rmdir "." please. 1300 */ 1301 if (dp == ip) { 1302 vrele(dvp); 1303 vput(vp); 1304 return (EINVAL); 1305 } 1306 fstrans_start(mp, FSTRANS_SHARED); 1307 /* 1308 * Verify the directory is empty (and valid). 1309 * (Rmdir ".." won't be valid since 1310 * ".." will contain a reference to 1311 * the current directory and thus be 1312 * non-empty.) 1313 */ 1314 error = 0; 1315 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1316 error = ENOTEMPTY; 1317 goto out; 1318 } 1319 /* 1320 * Delete the entry from the directory. For dos filesystems this 1321 * gets rid of the directory entry on disk, the in memory copy 1322 * still exists but the de_refcnt is <= 0. This prevents it from 1323 * being found by deget(). When the vput() on dep is done we give 1324 * up access and eventually msdosfs_reclaim() will be called which 1325 * will remove it from the denode cache. 1326 */ 1327 if ((error = removede(dp, ip)) != 0) 1328 goto out; 1329 /* 1330 * This is where we decrement the link count in the parent 1331 * directory. Since dos filesystems don't do this we just purge 1332 * the name cache and let go of the parent directory denode. 1333 */ 1334 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1335 cache_purge(dvp); 1336 vput(dvp); 1337 dvp = NULL; 1338 /* 1339 * Truncate the directory that is being deleted. 1340 */ 1341 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1342 cache_purge(vp); 1343 out: 1344 VN_KNOTE(vp, NOTE_DELETE); 1345 if (dvp) 1346 vput(dvp); 1347 vput(vp); 1348 fstrans_done(mp); 1349 return (error); 1350 } 1351 1352 int 1353 msdosfs_readdir(void *v) 1354 { 1355 struct vop_readdir_args /* { 1356 struct vnode *a_vp; 1357 struct uio *a_uio; 1358 kauth_cred_t a_cred; 1359 int *a_eofflag; 1360 off_t **a_cookies; 1361 int *a_ncookies; 1362 } */ *ap = v; 1363 int error = 0; 1364 int diff; 1365 long n; 1366 int blsize; 1367 long on; 1368 long lost; 1369 long count; 1370 u_long cn; 1371 ino_t fileno; 1372 u_long dirsperblk; 1373 long bias = 0; 1374 daddr_t bn, lbn; 1375 struct buf *bp; 1376 struct denode *dep = VTODE(ap->a_vp); 1377 struct msdosfsmount *pmp = dep->de_pmp; 1378 struct direntry *dentp; 1379 struct dirent *dirbuf; 1380 struct uio *uio = ap->a_uio; 1381 off_t *cookies = NULL; 1382 int ncookies = 0, nc = 0; 1383 off_t offset, uio_off; 1384 int chksum = -1; 1385 1386 #ifdef MSDOSFS_DEBUG 1387 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1388 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1389 #endif 1390 1391 /* 1392 * msdosfs_readdir() won't operate properly on regular files since 1393 * it does i/o only with the filesystem vnode, and hence can 1394 * retrieve the wrong block from the buffer cache for a plain file. 1395 * So, fail attempts to readdir() on a plain file. 1396 */ 1397 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1398 return (ENOTDIR); 1399 1400 /* 1401 * If the user buffer is smaller than the size of one dos directory 1402 * entry or the file offset is not a multiple of the size of a 1403 * directory entry, then we fail the read. 1404 */ 1405 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1406 offset = uio->uio_offset; 1407 if (count < sizeof(struct direntry) || 1408 (offset & (sizeof(struct direntry) - 1))) 1409 return (EINVAL); 1410 lost = uio->uio_resid - count; 1411 uio->uio_resid = count; 1412 uio_off = uio->uio_offset; 1413 1414 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 1415 1416 /* Allocate a temporary dirent buffer. */ 1417 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1418 1419 if (ap->a_ncookies) { 1420 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1421 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1422 *ap->a_cookies = cookies; 1423 } 1424 1425 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1426 1427 /* 1428 * If they are reading from the root directory then, we simulate 1429 * the . and .. entries since these don't exist in the root 1430 * directory. We also set the offset bias to make up for having to 1431 * simulate these entries. By this I mean that at file offset 64 we 1432 * read the first entry in the root directory that lives on disk. 1433 */ 1434 if (dep->de_StartCluster == MSDOSFSROOT 1435 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1436 #if 0 1437 printf("msdosfs_readdir(): going after . or .. in root dir, " 1438 "offset %" PRIu64 "\n", offset); 1439 #endif 1440 bias = 2 * sizeof(struct direntry); 1441 if (offset < bias) { 1442 for (n = (int)offset / sizeof(struct direntry); 1443 n < 2; n++) { 1444 if (FAT32(pmp)) 1445 dirbuf->d_fileno = cntobn(pmp, 1446 (ino_t)pmp->pm_rootdirblk) 1447 * dirsperblk; 1448 else 1449 dirbuf->d_fileno = 1; 1450 dirbuf->d_type = DT_DIR; 1451 switch (n) { 1452 case 0: 1453 dirbuf->d_namlen = 1; 1454 strlcpy(dirbuf->d_name, ".", 1455 sizeof(dirbuf->d_name)); 1456 break; 1457 case 1: 1458 dirbuf->d_namlen = 2; 1459 strlcpy(dirbuf->d_name, "..", 1460 sizeof(dirbuf->d_name)); 1461 break; 1462 } 1463 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1464 if (uio->uio_resid < dirbuf->d_reclen) 1465 goto out; 1466 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1467 if (error) 1468 goto out; 1469 offset += sizeof(struct direntry); 1470 uio_off = offset; 1471 if (cookies) { 1472 *cookies++ = offset; 1473 ncookies++; 1474 if (ncookies >= nc) 1475 goto out; 1476 } 1477 } 1478 } 1479 } 1480 1481 while (uio->uio_resid > 0) { 1482 lbn = de_cluster(pmp, offset - bias); 1483 on = (offset - bias) & pmp->pm_crbomask; 1484 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1485 diff = dep->de_FileSize - (offset - bias); 1486 if (diff <= 0) 1487 break; 1488 n = MIN(n, diff); 1489 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1490 break; 1491 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1492 NOCRED, 0, &bp); 1493 if (error) { 1494 goto bad; 1495 } 1496 n = MIN(n, blsize - bp->b_resid); 1497 1498 /* 1499 * Convert from dos directory entries to fs-independent 1500 * directory entries. 1501 */ 1502 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1503 (char *)dentp < (char *)bp->b_data + on + n; 1504 dentp++, offset += sizeof(struct direntry)) { 1505 #if 0 1506 1507 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1508 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1509 #endif 1510 /* 1511 * If this is an unused entry, we can stop. 1512 */ 1513 if (dentp->deName[0] == SLOT_EMPTY) { 1514 brelse(bp, 0); 1515 goto out; 1516 } 1517 /* 1518 * Skip deleted entries. 1519 */ 1520 if (dentp->deName[0] == SLOT_DELETED) { 1521 chksum = -1; 1522 continue; 1523 } 1524 1525 /* 1526 * Handle Win95 long directory entries 1527 */ 1528 if (dentp->deAttributes == ATTR_WIN95) { 1529 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1530 continue; 1531 chksum = win2unixfn((struct winentry *)dentp, 1532 dirbuf, chksum); 1533 continue; 1534 } 1535 1536 /* 1537 * Skip volume labels 1538 */ 1539 if (dentp->deAttributes & ATTR_VOLUME) { 1540 chksum = -1; 1541 continue; 1542 } 1543 /* 1544 * This computation of d_fileno must match 1545 * the computation of va_fileid in 1546 * msdosfs_getattr. 1547 */ 1548 if (dentp->deAttributes & ATTR_DIRECTORY) { 1549 fileno = getushort(dentp->deStartCluster); 1550 if (FAT32(pmp)) 1551 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1552 /* if this is the root directory */ 1553 if (fileno == MSDOSFSROOT) 1554 if (FAT32(pmp)) 1555 fileno = cntobn(pmp, 1556 (ino_t)pmp->pm_rootdirblk) 1557 * dirsperblk; 1558 else 1559 fileno = 1; 1560 else 1561 fileno = cntobn(pmp, fileno) * dirsperblk; 1562 dirbuf->d_fileno = fileno; 1563 dirbuf->d_type = DT_DIR; 1564 } else { 1565 dirbuf->d_fileno = 1566 offset / sizeof(struct direntry); 1567 dirbuf->d_type = DT_REG; 1568 } 1569 if (chksum != winChksum(dentp->deName)) 1570 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1571 (u_char *)dirbuf->d_name, 1572 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1573 else 1574 dirbuf->d_name[dirbuf->d_namlen] = 0; 1575 chksum = -1; 1576 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1577 if (uio->uio_resid < dirbuf->d_reclen) { 1578 brelse(bp, 0); 1579 goto out; 1580 } 1581 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1582 if (error) { 1583 brelse(bp, 0); 1584 goto out; 1585 } 1586 uio_off = offset + sizeof(struct direntry); 1587 if (cookies) { 1588 *cookies++ = offset + sizeof(struct direntry); 1589 ncookies++; 1590 if (ncookies >= nc) { 1591 brelse(bp, 0); 1592 goto out; 1593 } 1594 } 1595 } 1596 brelse(bp, 0); 1597 } 1598 1599 out: 1600 uio->uio_offset = uio_off; 1601 uio->uio_resid += lost; 1602 if (dep->de_FileSize - (offset - bias) <= 0) 1603 *ap->a_eofflag = 1; 1604 else 1605 *ap->a_eofflag = 0; 1606 1607 if (ap->a_ncookies) { 1608 if (error) { 1609 free(*ap->a_cookies, M_TEMP); 1610 *ap->a_ncookies = 0; 1611 *ap->a_cookies = NULL; 1612 } else 1613 *ap->a_ncookies = ncookies; 1614 } 1615 1616 bad: 1617 free(dirbuf, M_MSDOSFSTMP); 1618 fstrans_done(ap->a_vp->v_mount); 1619 return (error); 1620 } 1621 1622 /* 1623 * vp - address of vnode file the file 1624 * bn - which cluster we are interested in mapping to a filesystem block number. 1625 * vpp - returns the vnode for the block special file holding the filesystem 1626 * containing the file of interest 1627 * bnp - address of where to return the filesystem relative block number 1628 */ 1629 int 1630 msdosfs_bmap(void *v) 1631 { 1632 struct vop_bmap_args /* { 1633 struct vnode *a_vp; 1634 daddr_t a_bn; 1635 struct vnode **a_vpp; 1636 daddr_t *a_bnp; 1637 int *a_runp; 1638 } */ *ap = v; 1639 struct denode *dep = VTODE(ap->a_vp); 1640 int run, maxrun; 1641 daddr_t runbn; 1642 int status; 1643 1644 if (ap->a_vpp != NULL) 1645 *ap->a_vpp = dep->de_devvp; 1646 if (ap->a_bnp == NULL) 1647 return (0); 1648 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1649 1650 /* 1651 * From FreeBSD: 1652 * A little kludgy, but we loop calling pcbmap until we 1653 * reach the end of the contiguous piece, or reach MAXPHYS. 1654 * Since it reduces disk I/Os, the "wasted" CPU is put to 1655 * good use (4 to 5 fold sequential read I/O improvement on USB 1656 * drives). 1657 */ 1658 if (ap->a_runp != NULL) { 1659 /* taken from ufs_bmap */ 1660 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1661 dep->de_pmp->pm_maxcluster - ap->a_bn); 1662 for (run = 1; run <= maxrun; run++) { 1663 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1664 != 0 || runbn != 1665 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1666 break; 1667 } 1668 *ap->a_runp = run - 1; 1669 } 1670 1671 /* 1672 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1673 */ 1674 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1675 return status; 1676 } 1677 1678 int 1679 msdosfs_strategy(void *v) 1680 { 1681 struct vop_strategy_args /* { 1682 struct vnode *a_vp; 1683 struct buf *a_bp; 1684 } */ *ap = v; 1685 struct vnode *vp = ap->a_vp; 1686 struct buf *bp = ap->a_bp; 1687 struct denode *dep = VTODE(bp->b_vp); 1688 int error = 0; 1689 1690 if (vp->v_type == VBLK || vp->v_type == VCHR) 1691 panic("msdosfs_strategy: spec"); 1692 /* 1693 * If we don't already know the filesystem relative block number 1694 * then get it using pcbmap(). If pcbmap() returns the block 1695 * number as -1 then we've got a hole in the file. DOS filesystems 1696 * don't allow files with holes, so we shouldn't ever see this. 1697 */ 1698 if (bp->b_blkno == bp->b_lblkno) { 1699 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1700 &bp->b_blkno, 0, 0); 1701 if (error) 1702 bp->b_blkno = -1; 1703 if (bp->b_blkno == -1) 1704 clrbuf(bp); 1705 else 1706 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1707 } 1708 if (bp->b_blkno == -1) { 1709 biodone(bp); 1710 return (error); 1711 } 1712 1713 /* 1714 * Read/write the block from/to the disk that contains the desired 1715 * file block. 1716 */ 1717 1718 vp = dep->de_devvp; 1719 return (VOP_STRATEGY(vp, bp)); 1720 } 1721 1722 int 1723 msdosfs_print(void *v) 1724 { 1725 struct vop_print_args /* { 1726 struct vnode *vp; 1727 } */ *ap = v; 1728 struct denode *dep = VTODE(ap->a_vp); 1729 1730 printf( 1731 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1732 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1733 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1734 (unsigned long long)minor(dep->de_dev)); 1735 printf("\n"); 1736 return (0); 1737 } 1738 1739 int 1740 msdosfs_advlock(void *v) 1741 { 1742 struct vop_advlock_args /* { 1743 struct vnode *a_vp; 1744 void *a_id; 1745 int a_op; 1746 struct flock *a_fl; 1747 int a_flags; 1748 } */ *ap = v; 1749 struct denode *dep = VTODE(ap->a_vp); 1750 1751 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1752 } 1753 1754 int 1755 msdosfs_pathconf(void *v) 1756 { 1757 struct vop_pathconf_args /* { 1758 struct vnode *a_vp; 1759 int a_name; 1760 register_t *a_retval; 1761 } */ *ap = v; 1762 1763 switch (ap->a_name) { 1764 case _PC_LINK_MAX: 1765 *ap->a_retval = 1; 1766 return (0); 1767 case _PC_NAME_MAX: 1768 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1769 return (0); 1770 case _PC_PATH_MAX: 1771 *ap->a_retval = PATH_MAX; 1772 return (0); 1773 case _PC_CHOWN_RESTRICTED: 1774 *ap->a_retval = 1; 1775 return (0); 1776 case _PC_NO_TRUNC: 1777 *ap->a_retval = 1; 1778 return (0); 1779 case _PC_SYNC_IO: 1780 *ap->a_retval = 1; 1781 return (0); 1782 case _PC_FILESIZEBITS: 1783 *ap->a_retval = 32; 1784 return (0); 1785 default: 1786 return (EINVAL); 1787 } 1788 /* NOTREACHED */ 1789 } 1790 1791 int 1792 msdosfs_fsync(void *v) 1793 { 1794 struct vop_fsync_args /* { 1795 struct vnode *a_vp; 1796 kauth_cred_t a_cred; 1797 int a_flags; 1798 off_t offlo; 1799 off_t offhi; 1800 } */ *ap = v; 1801 struct vnode *vp = ap->a_vp; 1802 int wait; 1803 int error; 1804 1805 fstrans_start(vp->v_mount, FSTRANS_LAZY); 1806 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1807 error = vflushbuf(vp, ap->a_flags); 1808 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 1809 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1810 1811 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1812 struct denode *dep = VTODE(vp); 1813 struct vnode *devvp = dep->de_devvp; 1814 1815 int l = 0; 1816 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1817 curlwp->l_cred); 1818 } 1819 fstrans_done(vp->v_mount); 1820 1821 return (error); 1822 } 1823 1824 void 1825 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1826 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1827 { 1828 struct timespec *ts = NULL, tsb; 1829 1830 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1831 /* XXX just call getnanotime early and use result if needed? */ 1832 dep->de_flag |= DE_MODIFIED; 1833 if (dep->de_flag & DE_UPDATE) { 1834 if (mod == NULL) { 1835 getnanotime(&tsb); 1836 mod = ts = &tsb; 1837 } 1838 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1839 dep->de_Attributes |= ATTR_ARCHIVE; 1840 } 1841 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1842 if (dep->de_flag & DE_ACCESS) { 1843 if (acc == NULL) 1844 acc = ts == NULL ? 1845 (getnanotime(&tsb), ts = &tsb) : ts; 1846 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1847 } 1848 if (dep->de_flag & DE_CREATE) { 1849 if (cre == NULL) 1850 cre = ts == NULL ? 1851 (getnanotime(&tsb), ts = &tsb) : ts; 1852 unix2dostime(cre, gmtoff, &dep->de_CDate, 1853 &dep->de_CTime, &dep->de_CHun); 1854 } 1855 } 1856 1857 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1858 } 1859 1860 /* Global vfs data structures for msdosfs */ 1861 int (**msdosfs_vnodeop_p)(void *); 1862 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1863 { &vop_default_desc, vn_default_error }, 1864 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1865 { &vop_create_desc, msdosfs_create }, /* create */ 1866 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 1867 { &vop_open_desc, genfs_nullop }, /* open */ 1868 { &vop_close_desc, msdosfs_close }, /* close */ 1869 { &vop_access_desc, msdosfs_access }, /* access */ 1870 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1871 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1872 { &vop_read_desc, msdosfs_read }, /* read */ 1873 { &vop_write_desc, msdosfs_write }, /* write */ 1874 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1875 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1876 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1877 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1878 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1879 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1880 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1881 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1882 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1883 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 1884 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1885 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1886 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1887 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 1888 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1889 { &vop_readlink_desc, genfs_einval }, /* readlink */ 1890 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1891 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1892 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1893 { &vop_lock_desc, genfs_lock }, /* lock */ 1894 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1895 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1896 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1897 { &vop_print_desc, msdosfs_print }, /* print */ 1898 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1899 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1900 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1901 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1902 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1903 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1904 { NULL, NULL } 1905 }; 1906 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1907 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1908