1 /* $NetBSD: msdosfs_vnops.c,v 1.86 2013/03/18 19:35:37 plunky 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 1.86 2013/03/18 19:35:37 plunky 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_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 vput(ap->a_dvp); 159 *ap->a_vpp = DETOV(dep); 160 return (0); 161 162 bad: 163 fstrans_done(ap->a_dvp->v_mount); 164 vput(ap->a_dvp); 165 return (error); 166 } 167 168 int 169 msdosfs_close(void *v) 170 { 171 struct vop_close_args /* { 172 struct vnode *a_vp; 173 int a_fflag; 174 kauth_cred_t a_cred; 175 } */ *ap = v; 176 struct vnode *vp = ap->a_vp; 177 struct denode *dep = VTODE(vp); 178 179 fstrans_start(vp->v_mount, FSTRANS_SHARED); 180 mutex_enter(vp->v_interlock); 181 if (vp->v_usecount > 1) 182 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 183 mutex_exit(vp->v_interlock); 184 fstrans_done(vp->v_mount); 185 return (0); 186 } 187 188 static int 189 msdosfs_check_possible(struct vnode *vp, struct denode *dep, mode_t mode) 190 { 191 192 /* 193 * Disallow write attempts on read-only file systems; 194 * unless the file is a socket, fifo, or a block or 195 * character device resident on the file system. 196 */ 197 if (mode & VWRITE) { 198 switch (vp->v_type) { 199 case VDIR: 200 case VLNK: 201 case VREG: 202 if (vp->v_mount->mnt_flag & MNT_RDONLY) 203 return (EROFS); 204 default: 205 break; 206 } 207 } 208 209 return 0; 210 } 211 212 static int 213 msdosfs_check_permitted(struct vnode *vp, struct denode *dep, mode_t mode, 214 kauth_cred_t cred) 215 { 216 struct msdosfsmount *pmp = dep->de_pmp; 217 mode_t file_mode; 218 219 if ((dep->de_Attributes & ATTR_READONLY) == 0) 220 file_mode = S_IRWXU|S_IRWXG|S_IRWXO; 221 else 222 file_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 223 224 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 225 226 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 227 vp->v_type, file_mode), vp, NULL, genfs_can_access(vp->v_type, 228 file_mode, pmp->pm_uid, pmp->pm_gid, mode, cred)); 229 } 230 231 int 232 msdosfs_access(void *v) 233 { 234 struct vop_access_args /* { 235 struct vnode *a_vp; 236 int a_mode; 237 kauth_cred_t a_cred; 238 } */ *ap = v; 239 struct vnode *vp = ap->a_vp; 240 struct denode *dep = VTODE(vp); 241 int error; 242 243 error = msdosfs_check_possible(vp, dep, ap->a_mode); 244 if (error) 245 return error; 246 247 error = msdosfs_check_permitted(vp, dep, ap->a_mode, ap->a_cred); 248 249 return error; 250 } 251 252 int 253 msdosfs_getattr(void *v) 254 { 255 struct vop_getattr_args /* { 256 struct vnode *a_vp; 257 struct vattr *a_vap; 258 kauth_cred_t a_cred; 259 } */ *ap = v; 260 struct denode *dep = VTODE(ap->a_vp); 261 struct msdosfsmount *pmp = dep->de_pmp; 262 struct vattr *vap = ap->a_vap; 263 mode_t mode; 264 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 265 ino_t fileid; 266 267 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 268 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 269 vap->va_fsid = dep->de_dev; 270 /* 271 * The following computation of the fileid must be the same as that 272 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 273 * doesn't work. 274 */ 275 if (dep->de_Attributes & ATTR_DIRECTORY) { 276 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 277 if (dep->de_StartCluster == MSDOSFSROOT) 278 fileid = 1; 279 } else { 280 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 281 if (dep->de_dirclust == MSDOSFSROOT) 282 fileid = roottobn(pmp, 0) * dirsperblk; 283 fileid += dep->de_diroffset / sizeof(struct direntry); 284 } 285 vap->va_fileid = fileid; 286 if ((dep->de_Attributes & ATTR_READONLY) == 0) 287 mode = S_IRWXU|S_IRWXG|S_IRWXO; 288 else 289 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 290 vap->va_mode = 291 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 292 vap->va_uid = pmp->pm_uid; 293 vap->va_gid = pmp->pm_gid; 294 vap->va_nlink = 1; 295 vap->va_rdev = 0; 296 vap->va_size = ap->a_vp->v_size; 297 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 298 &vap->va_mtime); 299 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 300 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 301 &vap->va_atime); 302 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 303 pmp->pm_gmtoff, &vap->va_ctime); 304 } else { 305 vap->va_atime = vap->va_mtime; 306 vap->va_ctime = vap->va_mtime; 307 } 308 vap->va_flags = 0; 309 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) { 310 vap->va_flags |= SF_ARCHIVED; 311 vap->va_mode |= S_ARCH1; 312 } 313 vap->va_gen = 0; 314 vap->va_blocksize = pmp->pm_bpcluster; 315 vap->va_bytes = 316 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 317 vap->va_type = ap->a_vp->v_type; 318 fstrans_done(ap->a_vp->v_mount); 319 return (0); 320 } 321 322 int 323 msdosfs_setattr(void *v) 324 { 325 struct vop_setattr_args /* { 326 struct vnode *a_vp; 327 struct vattr *a_vap; 328 kauth_cred_t a_cred; 329 } */ *ap = v; 330 int error = 0, de_changed = 0; 331 struct denode *dep = VTODE(ap->a_vp); 332 struct msdosfsmount *pmp = dep->de_pmp; 333 struct vnode *vp = ap->a_vp; 334 struct vattr *vap = ap->a_vap; 335 kauth_cred_t cred = ap->a_cred; 336 337 #ifdef MSDOSFS_DEBUG 338 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 339 ap->a_vp, vap, cred); 340 #endif 341 /* 342 * Note we silently ignore uid or gid changes. 343 */ 344 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 345 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 346 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 347 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 348 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 349 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 350 #ifdef MSDOSFS_DEBUG 351 printf("msdosfs_setattr(): returning EINVAL\n"); 352 printf(" va_type %d, va_nlink %x, va_fsid %"PRIx64", va_fileid %llx\n", 353 vap->va_type, vap->va_nlink, vap->va_fsid, 354 (unsigned long long)vap->va_fileid); 355 printf(" va_blocksize %lx, va_rdev %"PRIx64", va_bytes %"PRIx64", va_gen %lx\n", 356 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 357 #endif 358 return (EINVAL); 359 } 360 /* 361 * Silently ignore attributes modifications on directories. 362 */ 363 if (ap->a_vp->v_type == VDIR) 364 return 0; 365 366 fstrans_start(vp->v_mount, FSTRANS_SHARED); 367 if (vap->va_size != VNOVAL) { 368 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 369 error = EROFS; 370 goto bad; 371 } 372 error = detrunc(dep, (u_long)vap->va_size, 0, cred); 373 if (error) 374 goto bad; 375 de_changed = 1; 376 } 377 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 378 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 379 error = EROFS; 380 goto bad; 381 } 382 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, 383 ap->a_vp, NULL, genfs_can_chtimes(ap->a_vp, vap->va_vaflags, 384 pmp->pm_uid, cred)); 385 if (error) 386 goto bad; 387 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 388 vap->va_atime.tv_sec != VNOVAL) 389 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 390 if (vap->va_mtime.tv_sec != VNOVAL) 391 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 392 dep->de_Attributes |= ATTR_ARCHIVE; 393 dep->de_flag |= DE_MODIFIED; 394 de_changed = 1; 395 } 396 /* 397 * DOS files only have the ability to have their writability 398 * attribute set, so we use the owner write bit to set the readonly 399 * attribute. 400 */ 401 if (vap->va_mode != (mode_t)VNOVAL) { 402 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 403 error = EROFS; 404 goto bad; 405 } 406 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 407 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 408 if (error) 409 goto bad; 410 /* We ignore the read and execute bits. */ 411 if (vap->va_mode & S_IWUSR) 412 dep->de_Attributes &= ~ATTR_READONLY; 413 else 414 dep->de_Attributes |= ATTR_READONLY; 415 dep->de_flag |= DE_MODIFIED; 416 de_changed = 1; 417 } 418 /* 419 * Allow the `archived' bit to be toggled. 420 */ 421 if (vap->va_flags != VNOVAL) { 422 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 423 error = EROFS; 424 goto bad; 425 } 426 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 427 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 428 if (error) 429 goto bad; 430 if (vap->va_flags & SF_ARCHIVED) 431 dep->de_Attributes &= ~ATTR_ARCHIVE; 432 else 433 dep->de_Attributes |= ATTR_ARCHIVE; 434 dep->de_flag |= DE_MODIFIED; 435 de_changed = 1; 436 } 437 438 if (de_changed) { 439 VN_KNOTE(vp, NOTE_ATTRIB); 440 error = deupdat(dep, 1); 441 if (error) 442 goto bad; 443 } 444 445 bad: 446 fstrans_done(vp->v_mount); 447 return error; 448 } 449 450 int 451 msdosfs_read(void *v) 452 { 453 struct vop_read_args /* { 454 struct vnode *a_vp; 455 struct uio *a_uio; 456 int a_ioflag; 457 kauth_cred_t a_cred; 458 } */ *ap = v; 459 int error = 0; 460 int64_t diff; 461 int blsize; 462 long n; 463 long on; 464 daddr_t lbn; 465 vsize_t bytelen; 466 struct buf *bp; 467 struct vnode *vp = ap->a_vp; 468 struct denode *dep = VTODE(vp); 469 struct msdosfsmount *pmp = dep->de_pmp; 470 struct uio *uio = ap->a_uio; 471 472 /* 473 * If they didn't ask for any data, then we are done. 474 */ 475 476 if (uio->uio_resid == 0) 477 return (0); 478 if (uio->uio_offset < 0) 479 return (EINVAL); 480 if (uio->uio_offset >= dep->de_FileSize) 481 return (0); 482 483 fstrans_start(vp->v_mount, FSTRANS_SHARED); 484 if (vp->v_type == VREG) { 485 const int advice = IO_ADV_DECODE(ap->a_ioflag); 486 487 while (uio->uio_resid > 0) { 488 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 489 uio->uio_resid); 490 491 if (bytelen == 0) 492 break; 493 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 494 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 495 if (error) 496 break; 497 } 498 dep->de_flag |= DE_ACCESS; 499 goto out; 500 } 501 502 /* this loop is only for directories now */ 503 do { 504 lbn = de_cluster(pmp, uio->uio_offset); 505 on = uio->uio_offset & pmp->pm_crbomask; 506 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 507 if (uio->uio_offset >= dep->de_FileSize) { 508 fstrans_done(vp->v_mount); 509 return (0); 510 } 511 /* file size (and hence diff) may be up to 4GB */ 512 diff = dep->de_FileSize - uio->uio_offset; 513 if (diff < n) 514 n = (long) diff; 515 516 /* convert cluster # to sector # */ 517 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 518 if (error) 519 goto bad; 520 521 /* 522 * If we are operating on a directory file then be sure to 523 * do i/o with the vnode for the filesystem instead of the 524 * vnode for the directory. 525 */ 526 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 527 NOCRED, 0, &bp); 528 if (error) { 529 goto bad; 530 } 531 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 532 error = uiomove((char *)bp->b_data + on, (int) n, uio); 533 brelse(bp, 0); 534 } while (error == 0 && uio->uio_resid > 0 && n != 0); 535 536 out: 537 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 538 error = deupdat(dep, 1); 539 bad: 540 fstrans_done(vp->v_mount); 541 return (error); 542 } 543 544 /* 545 * Write data to a file or directory. 546 */ 547 int 548 msdosfs_write(void *v) 549 { 550 struct vop_write_args /* { 551 struct vnode *a_vp; 552 struct uio *a_uio; 553 int a_ioflag; 554 kauth_cred_t a_cred; 555 } */ *ap = v; 556 int resid, extended = 0; 557 int error = 0; 558 int ioflag = ap->a_ioflag; 559 u_long osize; 560 u_long count; 561 vsize_t bytelen; 562 off_t oldoff; 563 size_t rem; 564 struct uio *uio = ap->a_uio; 565 struct vnode *vp = ap->a_vp; 566 struct denode *dep = VTODE(vp); 567 struct msdosfsmount *pmp = dep->de_pmp; 568 kauth_cred_t cred = ap->a_cred; 569 bool async; 570 571 #ifdef MSDOSFS_DEBUG 572 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 573 vp, uio, ioflag, cred); 574 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 575 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 576 #endif 577 578 switch (vp->v_type) { 579 case VREG: 580 if (ioflag & IO_APPEND) 581 uio->uio_offset = dep->de_FileSize; 582 break; 583 case VDIR: 584 return EISDIR; 585 default: 586 panic("msdosfs_write(): bad file type"); 587 } 588 589 if (uio->uio_offset < 0) 590 return (EINVAL); 591 592 if (uio->uio_resid == 0) 593 return (0); 594 595 /* Don't bother to try to write files larger than the fs limit */ 596 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 597 return (EFBIG); 598 599 fstrans_start(vp->v_mount, FSTRANS_SHARED); 600 /* 601 * If the offset we are starting the write at is beyond the end of 602 * the file, then they've done a seek. Unix filesystems allow 603 * files with holes in them, DOS doesn't so we must fill the hole 604 * with zeroed blocks. 605 */ 606 if (uio->uio_offset > dep->de_FileSize) { 607 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) { 608 fstrans_done(vp->v_mount); 609 return (error); 610 } 611 } 612 613 /* 614 * Remember some values in case the write fails. 615 */ 616 async = vp->v_mount->mnt_flag & MNT_ASYNC; 617 resid = uio->uio_resid; 618 osize = dep->de_FileSize; 619 620 /* 621 * If we write beyond the end of the file, extend it to its ultimate 622 * size ahead of the time to hopefully get a contiguous area. 623 */ 624 if (uio->uio_offset + resid > osize) { 625 count = de_clcount(pmp, uio->uio_offset + resid) - 626 de_clcount(pmp, osize); 627 if ((error = extendfile(dep, count, NULL, NULL, 0))) 628 goto errexit; 629 630 dep->de_FileSize = uio->uio_offset + resid; 631 /* hint uvm to not read in extended part */ 632 uvm_vnp_setwritesize(vp, dep->de_FileSize); 633 /* zero out the remainder of the last page */ 634 rem = round_page(dep->de_FileSize) - dep->de_FileSize; 635 if (rem > 0) 636 ubc_zerorange(&vp->v_uobj, (off_t)dep->de_FileSize, 637 rem, UBC_UNMAP_FLAG(vp)); 638 extended = 1; 639 } 640 641 do { 642 oldoff = uio->uio_offset; 643 bytelen = uio->uio_resid; 644 645 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 646 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 647 if (error) 648 break; 649 650 /* 651 * flush what we just wrote if necessary. 652 * XXXUBC simplistic async flushing. 653 */ 654 655 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 656 mutex_enter(vp->v_interlock); 657 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 658 (uio->uio_offset >> 16) << 16, 659 PGO_CLEANIT | PGO_LAZY); 660 } 661 } while (error == 0 && uio->uio_resid > 0); 662 663 /* set final size */ 664 uvm_vnp_setsize(vp, dep->de_FileSize); 665 if (error == 0 && ioflag & IO_SYNC) { 666 mutex_enter(vp->v_interlock); 667 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 668 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 669 } 670 dep->de_flag |= DE_UPDATE; 671 672 /* 673 * If the write failed and they want us to, truncate the file back 674 * to the size it was before the write was attempted. 675 */ 676 errexit: 677 if (resid > uio->uio_resid) 678 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 679 if (error) { 680 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 681 uio->uio_offset -= resid - uio->uio_resid; 682 uio->uio_resid = resid; 683 } else if ((ioflag & IO_SYNC) == IO_SYNC) 684 error = deupdat(dep, 1); 685 fstrans_done(vp->v_mount); 686 KASSERT(vp->v_size == dep->de_FileSize); 687 return (error); 688 } 689 690 int 691 msdosfs_update(struct vnode *vp, const struct timespec *acc, 692 const struct timespec *mod, int flags) 693 { 694 struct buf *bp; 695 struct direntry *dirp; 696 struct denode *dep; 697 int error; 698 699 if (vp->v_mount->mnt_flag & MNT_RDONLY) 700 return (0); 701 dep = VTODE(vp); 702 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 703 if ((dep->de_flag & DE_MODIFIED) == 0) 704 return (0); 705 dep->de_flag &= ~DE_MODIFIED; 706 if (dep->de_Attributes & ATTR_DIRECTORY) 707 return (0); 708 if (dep->de_refcnt <= 0) 709 return (0); 710 error = readde(dep, &bp, &dirp); 711 if (error) 712 return (error); 713 DE_EXTERNALIZE(dirp, dep); 714 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 715 return (bwrite(bp)); 716 else { 717 bdwrite(bp); 718 return (0); 719 } 720 } 721 722 /* 723 * Flush the blocks of a file to disk. 724 * 725 * This function is worthless for vnodes that represent directories. Maybe we 726 * could just do a sync if they try an fsync on a directory file. 727 */ 728 int 729 msdosfs_remove(void *v) 730 { 731 struct vop_remove_args /* { 732 struct vnode *a_dvp; 733 struct vnode *a_vp; 734 struct componentname *a_cnp; 735 } */ *ap = v; 736 struct denode *dep = VTODE(ap->a_vp); 737 struct denode *ddep = VTODE(ap->a_dvp); 738 int error; 739 740 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 741 if (ap->a_vp->v_type == VDIR) 742 error = EPERM; 743 else 744 error = removede(ddep, dep); 745 #ifdef MSDOSFS_DEBUG 746 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 747 dep, ap->a_vp->v_usecount); 748 #endif 749 VN_KNOTE(ap->a_vp, NOTE_DELETE); 750 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 751 if (ddep == dep) 752 vrele(ap->a_vp); 753 else 754 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 755 * via vrele() */ 756 vput(ap->a_dvp); 757 fstrans_done(ap->a_dvp->v_mount); 758 return (error); 759 } 760 761 /* 762 * Renames on files require moving the denode to a new hash queue since the 763 * denode's location is used to compute which hash queue to put the file 764 * in. Unless it is a rename in place. For example "mv a b". 765 * 766 * What follows is the basic algorithm: 767 * 768 * if (file move) { 769 * if (dest file exists) { 770 * remove dest file 771 * } 772 * if (dest and src in same directory) { 773 * rewrite name in existing directory slot 774 * } else { 775 * write new entry in dest directory 776 * update offset and dirclust in denode 777 * move denode to new hash chain 778 * clear old directory entry 779 * } 780 * } else { 781 * directory move 782 * if (dest directory exists) { 783 * if (dest is not empty) { 784 * return ENOTEMPTY 785 * } 786 * remove dest directory 787 * } 788 * if (dest and src in same directory) { 789 * rewrite name in existing entry 790 * } else { 791 * be sure dest is not a child of src directory 792 * write entry in dest directory 793 * update "." and ".." in moved directory 794 * update offset and dirclust in denode 795 * move denode to new hash chain 796 * clear old directory entry for moved directory 797 * } 798 * } 799 * 800 * On entry: 801 * source's parent directory is unlocked 802 * source file or directory is unlocked 803 * destination's parent directory is locked 804 * destination file or directory is locked if it exists 805 * 806 * On exit: 807 * all denodes should be released 808 * 809 * Notes: 810 * I'm not sure how the memory containing the pathnames pointed at by the 811 * componentname structures is freed, there may be some memory bleeding 812 * for each rename done. 813 * 814 * --More-- Notes: 815 * This routine needs help. badly. 816 */ 817 int 818 msdosfs_rename(void *v) 819 { 820 struct vop_rename_args /* { 821 struct vnode *a_fdvp; 822 struct vnode *a_fvp; 823 struct componentname *a_fcnp; 824 struct vnode *a_tdvp; 825 struct vnode *a_tvp; 826 struct componentname *a_tcnp; 827 } */ *ap = v; 828 struct vnode *tvp = ap->a_tvp; 829 struct vnode *tdvp = ap->a_tdvp; 830 struct vnode *fvp = ap->a_fvp; 831 struct vnode *fdvp = ap->a_fdvp; 832 struct componentname *tcnp = ap->a_tcnp; 833 struct componentname *fcnp = ap->a_fcnp; 834 struct denode *ip, *xp, *dp, *zp; 835 u_char toname[12], oldname[12]; 836 u_long from_diroffset, to_diroffset; 837 u_char to_count; 838 int doingdirectory = 0, newparent = 0; 839 int error; 840 u_long cn; 841 daddr_t bn; 842 struct msdosfsmount *pmp; 843 struct direntry *dotdotp; 844 struct buf *bp; 845 846 pmp = VFSTOMSDOSFS(fdvp->v_mount); 847 848 /* 849 * Check for cross-device rename. 850 */ 851 if ((fvp->v_mount != tdvp->v_mount) || 852 (tvp && (fvp->v_mount != tvp->v_mount))) { 853 error = EXDEV; 854 abortit: 855 VOP_ABORTOP(tdvp, tcnp); 856 if (tdvp == tvp) 857 vrele(tdvp); 858 else 859 vput(tdvp); 860 if (tvp) 861 vput(tvp); 862 VOP_ABORTOP(fdvp, fcnp); 863 vrele(fdvp); 864 vrele(fvp); 865 return (error); 866 } 867 868 /* 869 * If source and dest are the same, do nothing. 870 */ 871 if (tvp == fvp) { 872 error = 0; 873 goto abortit; 874 } 875 876 /* 877 * XXX: This can deadlock since we hold tdvp/tvp locked. 878 * But I'm not going to fix it now. 879 */ 880 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 881 goto abortit; 882 dp = VTODE(fdvp); 883 ip = VTODE(fvp); 884 885 /* 886 * Be sure we are not renaming ".", "..", or an alias of ".". This 887 * leads to a crippled directory tree. It's pretty tough to do a 888 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 889 * doesn't work if the ".." entry is missing. 890 */ 891 if (ip->de_Attributes & ATTR_DIRECTORY) { 892 /* 893 * Avoid ".", "..", and aliases of "." for obvious reasons. 894 */ 895 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 896 dp == ip || 897 (fcnp->cn_flags & ISDOTDOT) || 898 (tcnp->cn_flags & ISDOTDOT) || 899 (ip->de_flag & DE_RENAME)) { 900 VOP_UNLOCK(fvp); 901 error = EINVAL; 902 goto abortit; 903 } 904 ip->de_flag |= DE_RENAME; 905 doingdirectory++; 906 } 907 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 908 909 fstrans_start(fdvp->v_mount, FSTRANS_SHARED); 910 /* 911 * When the target exists, both the directory 912 * and target vnodes are returned locked. 913 */ 914 dp = VTODE(tdvp); 915 xp = tvp ? VTODE(tvp) : NULL; 916 /* 917 * Remember direntry place to use for destination 918 */ 919 to_diroffset = dp->de_fndoffset; 920 to_count = dp->de_fndcnt; 921 922 /* 923 * If ".." must be changed (ie the directory gets a new 924 * parent) then the source directory must not be in the 925 * directory hierarchy above the target, as this would 926 * orphan everything below the source directory. Also 927 * the user must have write permission in the source so 928 * as to be able to change "..". We must repeat the call 929 * to namei, as the parent directory is unlocked by the 930 * call to doscheckpath(). 931 */ 932 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 933 VOP_UNLOCK(fvp); 934 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 935 newparent = 1; 936 937 if (doingdirectory && newparent) { 938 if (error) /* write access check above */ 939 goto tdvpbad; 940 if (xp != NULL) 941 vput(tvp); 942 tvp = NULL; 943 /* 944 * doscheckpath() vput()'s tdvp (dp == VTODE(tdvp)), 945 * so we have to get an extra ref to it first, and 946 * because it's been unlocked we need to do a relookup 947 * afterwards in case tvp has changed. 948 */ 949 vref(tdvp); 950 if ((error = doscheckpath(ip, dp)) != 0) 951 goto bad; 952 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 953 if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) { 954 VOP_UNLOCK(tdvp); 955 goto bad; 956 } 957 dp = VTODE(tdvp); 958 xp = tvp ? VTODE(tvp) : NULL; 959 } 960 961 if (xp != NULL) { 962 /* 963 * Target must be empty if a directory and have no links 964 * to it. Also, ensure source and target are compatible 965 * (both directories, or both not directories). 966 */ 967 if (xp->de_Attributes & ATTR_DIRECTORY) { 968 if (!dosdirempty(xp)) { 969 error = ENOTEMPTY; 970 goto tdvpbad; 971 } 972 if (!doingdirectory) { 973 error = ENOTDIR; 974 goto tdvpbad; 975 } 976 } else if (doingdirectory) { 977 error = EISDIR; 978 goto tdvpbad; 979 } 980 if ((error = removede(dp, xp)) != 0) 981 goto tdvpbad; 982 VN_KNOTE(tdvp, NOTE_WRITE); 983 VN_KNOTE(tvp, NOTE_DELETE); 984 cache_purge(tvp); 985 vput(tvp); 986 tvp = NULL; 987 xp = NULL; 988 } 989 990 /* 991 * Convert the filename in tcnp into a dos filename. We copy this 992 * into the denode and directory entry for the destination 993 * file/directory. 994 */ 995 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) { 996 fstrans_done(fdvp->v_mount); 997 goto abortit; 998 } 999 1000 /* 1001 * Since from wasn't locked at various places above, 1002 * have to do a relookup here. 1003 */ 1004 fcnp->cn_flags &= ~MODMASK; 1005 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1006 VOP_UNLOCK(tdvp); 1007 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1008 if ((error = relookup(fdvp, &fvp, fcnp, 0))) { 1009 VOP_UNLOCK(fdvp); 1010 vrele(ap->a_fvp); 1011 vrele(tdvp); 1012 fstrans_done(fdvp->v_mount); 1013 return (error); 1014 } 1015 if (fvp == NULL) { 1016 /* 1017 * From name has disappeared. 1018 */ 1019 if (doingdirectory) 1020 panic("rename: lost dir entry"); 1021 vput(fdvp); 1022 vrele(ap->a_fvp); 1023 vrele(tdvp); 1024 fstrans_done(fdvp->v_mount); 1025 return 0; 1026 } 1027 VOP_UNLOCK(fdvp); 1028 xp = VTODE(fvp); 1029 zp = VTODE(fdvp); 1030 from_diroffset = zp->de_fndoffset; 1031 1032 /* 1033 * Ensure that the directory entry still exists and has not 1034 * changed till now. If the source is a file the entry may 1035 * have been unlinked or renamed. In either case there is 1036 * no further work to be done. If the source is a directory 1037 * then it cannot have been rmdir'ed or renamed; this is 1038 * prohibited by the DE_RENAME flag. 1039 */ 1040 if (xp != ip) { 1041 if (doingdirectory) 1042 panic("rename: lost dir entry"); 1043 vrele(ap->a_fvp); 1044 xp = NULL; 1045 } else { 1046 vrele(fvp); 1047 xp = NULL; 1048 1049 /* 1050 * First write a new entry in the destination 1051 * directory and mark the entry in the source directory 1052 * as deleted. Then move the denode to the correct hash 1053 * chain for its new location in the filesystem. And, if 1054 * we moved a directory, then update its .. entry to point 1055 * to the new parent directory. 1056 */ 1057 memcpy(oldname, ip->de_Name, 11); 1058 memcpy(ip->de_Name, toname, 11); /* update denode */ 1059 dp->de_fndoffset = to_diroffset; 1060 dp->de_fndcnt = to_count; 1061 error = createde(ip, dp, (struct denode **)0, tcnp); 1062 if (error) { 1063 memcpy(ip->de_Name, oldname, 11); 1064 VOP_UNLOCK(fvp); 1065 goto bad; 1066 } 1067 ip->de_refcnt++; 1068 zp->de_fndoffset = from_diroffset; 1069 if ((error = removede(zp, ip)) != 0) { 1070 /* XXX should really panic here, fs is corrupt */ 1071 VOP_UNLOCK(fvp); 1072 goto bad; 1073 } 1074 cache_purge(fvp); 1075 if (!doingdirectory) { 1076 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1077 &ip->de_dirclust, 0); 1078 if (error) { 1079 /* XXX should really panic here, fs is corrupt */ 1080 VOP_UNLOCK(fvp); 1081 goto bad; 1082 } 1083 ip->de_diroffset = to_diroffset; 1084 if (ip->de_dirclust != MSDOSFSROOT) 1085 ip->de_diroffset &= pmp->pm_crbomask; 1086 } 1087 reinsert(ip); 1088 } 1089 1090 /* 1091 * If we moved a directory to a new parent directory, then we must 1092 * fixup the ".." entry in the moved directory. 1093 */ 1094 if (doingdirectory && newparent) { 1095 cn = ip->de_StartCluster; 1096 if (cn == MSDOSFSROOT) { 1097 /* this should never happen */ 1098 panic("msdosfs_rename: updating .. in root directory?"); 1099 } else 1100 bn = cntobn(pmp, cn); 1101 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1102 pmp->pm_bpcluster, NOCRED, B_MODIFY, &bp); 1103 if (error) { 1104 /* XXX should really panic here, fs is corrupt */ 1105 VOP_UNLOCK(fvp); 1106 goto bad; 1107 } 1108 dotdotp = (struct direntry *)bp->b_data + 1; 1109 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1110 if (FAT32(pmp)) { 1111 putushort(dotdotp->deHighClust, 1112 dp->de_StartCluster >> 16); 1113 } else { 1114 putushort(dotdotp->deHighClust, 0); 1115 } 1116 if ((error = bwrite(bp)) != 0) { 1117 /* XXX should really panic here, fs is corrupt */ 1118 VOP_UNLOCK(fvp); 1119 goto bad; 1120 } 1121 } 1122 1123 VN_KNOTE(fvp, NOTE_RENAME); 1124 VOP_UNLOCK(fvp); 1125 bad: 1126 if (tvp) 1127 vput(tvp); 1128 vrele(tdvp); 1129 ip->de_flag &= ~DE_RENAME; 1130 vrele(fdvp); 1131 vrele(fvp); 1132 fstrans_done(fdvp->v_mount); 1133 return (error); 1134 1135 /* XXX: uuuh */ 1136 tdvpbad: 1137 VOP_UNLOCK(tdvp); 1138 goto bad; 1139 } 1140 1141 static const struct { 1142 struct direntry dot; 1143 struct direntry dotdot; 1144 } dosdirtemplate = { 1145 { ". ", " ", /* the . entry */ 1146 ATTR_DIRECTORY, /* file attribute */ 1147 0, /* reserved */ 1148 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1149 { 0, 0 }, /* access date */ 1150 { 0, 0 }, /* high bits of start cluster */ 1151 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1152 { 0, 0 }, /* startcluster */ 1153 { 0, 0, 0, 0 } /* filesize */ 1154 }, 1155 { ".. ", " ", /* the .. entry */ 1156 ATTR_DIRECTORY, /* file attribute */ 1157 0, /* reserved */ 1158 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1159 { 0, 0 }, /* access date */ 1160 { 0, 0 }, /* high bits of start cluster */ 1161 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1162 { 0, 0 }, /* startcluster */ 1163 { 0, 0, 0, 0 } /* filesize */ 1164 } 1165 }; 1166 1167 int 1168 msdosfs_mkdir(void *v) 1169 { 1170 struct vop_mkdir_args /* { 1171 struct vnode *a_dvp; 1172 struvt vnode **a_vpp; 1173 struvt componentname *a_cnp; 1174 struct vattr *a_vap; 1175 } */ *ap = v; 1176 struct componentname *cnp = ap->a_cnp; 1177 struct denode ndirent; 1178 struct denode *dep; 1179 struct denode *pdep = VTODE(ap->a_dvp); 1180 int error; 1181 int bn; 1182 u_long newcluster, pcl; 1183 daddr_t lbn; 1184 struct direntry *denp; 1185 struct msdosfsmount *pmp = pdep->de_pmp; 1186 struct buf *bp; 1187 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1188 1189 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1190 /* 1191 * If this is the root directory and there is no space left we 1192 * can't do anything. This is because the root directory can not 1193 * change size. 1194 */ 1195 if (pdep->de_StartCluster == MSDOSFSROOT 1196 && pdep->de_fndoffset >= pdep->de_FileSize) { 1197 error = ENOSPC; 1198 goto bad2; 1199 } 1200 1201 /* 1202 * Allocate a cluster to hold the about to be created directory. 1203 */ 1204 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1205 if (error) 1206 goto bad2; 1207 1208 memset(&ndirent, 0, sizeof(ndirent)); 1209 ndirent.de_pmp = pmp; 1210 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1211 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1212 1213 /* 1214 * Now fill the cluster with the "." and ".." entries. And write 1215 * the cluster to disk. This way it is there for the parent 1216 * directory to be pointing at if there were a crash. 1217 */ 1218 bn = cntobn(pmp, newcluster); 1219 lbn = de_bn2kb(pmp, bn); 1220 /* always succeeds */ 1221 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1222 memset(bp->b_data, 0, pmp->pm_bpcluster); 1223 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1224 denp = (struct direntry *)bp->b_data; 1225 putushort(denp[0].deStartCluster, newcluster); 1226 putushort(denp[0].deCDate, ndirent.de_CDate); 1227 putushort(denp[0].deCTime, ndirent.de_CTime); 1228 denp[0].deCHundredth = ndirent.de_CHun; 1229 putushort(denp[0].deADate, ndirent.de_ADate); 1230 putushort(denp[0].deMDate, ndirent.de_MDate); 1231 putushort(denp[0].deMTime, ndirent.de_MTime); 1232 pcl = pdep->de_StartCluster; 1233 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1234 pcl = 0; 1235 putushort(denp[1].deStartCluster, pcl); 1236 putushort(denp[1].deCDate, ndirent.de_CDate); 1237 putushort(denp[1].deCTime, ndirent.de_CTime); 1238 denp[1].deCHundredth = ndirent.de_CHun; 1239 putushort(denp[1].deADate, ndirent.de_ADate); 1240 putushort(denp[1].deMDate, ndirent.de_MDate); 1241 putushort(denp[1].deMTime, ndirent.de_MTime); 1242 if (FAT32(pmp)) { 1243 putushort(denp[0].deHighClust, newcluster >> 16); 1244 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1245 } else { 1246 putushort(denp[0].deHighClust, 0); 1247 putushort(denp[1].deHighClust, 0); 1248 } 1249 1250 if (async) 1251 bdwrite(bp); 1252 else if ((error = bwrite(bp)) != 0) 1253 goto bad; 1254 1255 /* 1256 * Now build up a directory entry pointing to the newly allocated 1257 * cluster. This will be written to an empty slot in the parent 1258 * directory. 1259 */ 1260 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1261 goto bad; 1262 1263 ndirent.de_Attributes = ATTR_DIRECTORY; 1264 ndirent.de_StartCluster = newcluster; 1265 ndirent.de_FileSize = 0; 1266 ndirent.de_dev = pdep->de_dev; 1267 ndirent.de_devvp = pdep->de_devvp; 1268 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1269 goto bad; 1270 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1271 vput(ap->a_dvp); 1272 *ap->a_vpp = DETOV(dep); 1273 fstrans_done(ap->a_dvp->v_mount); 1274 return (0); 1275 1276 bad: 1277 clusterfree(pmp, newcluster, NULL); 1278 bad2: 1279 vput(ap->a_dvp); 1280 fstrans_done(ap->a_dvp->v_mount); 1281 return (error); 1282 } 1283 1284 int 1285 msdosfs_rmdir(void *v) 1286 { 1287 struct vop_rmdir_args /* { 1288 struct vnode *a_dvp; 1289 struct vnode *a_vp; 1290 struct componentname *a_cnp; 1291 } */ *ap = v; 1292 struct vnode *vp = ap->a_vp; 1293 struct vnode *dvp = ap->a_dvp; 1294 struct componentname *cnp = ap->a_cnp; 1295 struct denode *ip, *dp; 1296 int error; 1297 1298 ip = VTODE(vp); 1299 dp = VTODE(dvp); 1300 /* 1301 * No rmdir "." please. 1302 */ 1303 if (dp == ip) { 1304 vrele(dvp); 1305 vput(vp); 1306 return (EINVAL); 1307 } 1308 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1309 /* 1310 * Verify the directory is empty (and valid). 1311 * (Rmdir ".." won't be valid since 1312 * ".." will contain a reference to 1313 * the current directory and thus be 1314 * non-empty.) 1315 */ 1316 error = 0; 1317 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1318 error = ENOTEMPTY; 1319 goto out; 1320 } 1321 /* 1322 * Delete the entry from the directory. For dos filesystems this 1323 * gets rid of the directory entry on disk, the in memory copy 1324 * still exists but the de_refcnt is <= 0. This prevents it from 1325 * being found by deget(). When the vput() on dep is done we give 1326 * up access and eventually msdosfs_reclaim() will be called which 1327 * will remove it from the denode cache. 1328 */ 1329 if ((error = removede(dp, ip)) != 0) 1330 goto out; 1331 /* 1332 * This is where we decrement the link count in the parent 1333 * directory. Since dos filesystems don't do this we just purge 1334 * the name cache and let go of the parent directory denode. 1335 */ 1336 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1337 cache_purge(dvp); 1338 vput(dvp); 1339 dvp = NULL; 1340 /* 1341 * Truncate the directory that is being deleted. 1342 */ 1343 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1344 cache_purge(vp); 1345 out: 1346 VN_KNOTE(vp, NOTE_DELETE); 1347 if (dvp) 1348 vput(dvp); 1349 vput(vp); 1350 fstrans_done(ap->a_dvp->v_mount); 1351 return (error); 1352 } 1353 1354 int 1355 msdosfs_readdir(void *v) 1356 { 1357 struct vop_readdir_args /* { 1358 struct vnode *a_vp; 1359 struct uio *a_uio; 1360 kauth_cred_t a_cred; 1361 int *a_eofflag; 1362 off_t **a_cookies; 1363 int *a_ncookies; 1364 } */ *ap = v; 1365 int error = 0; 1366 int diff; 1367 long n; 1368 int blsize; 1369 long on; 1370 long lost; 1371 long count; 1372 u_long cn; 1373 ino_t fileno; 1374 u_long dirsperblk; 1375 long bias = 0; 1376 daddr_t bn, lbn; 1377 struct buf *bp; 1378 struct denode *dep = VTODE(ap->a_vp); 1379 struct msdosfsmount *pmp = dep->de_pmp; 1380 struct direntry *dentp; 1381 struct dirent *dirbuf; 1382 struct uio *uio = ap->a_uio; 1383 off_t *cookies = NULL; 1384 int ncookies = 0, nc = 0; 1385 off_t offset, uio_off; 1386 int chksum = -1; 1387 1388 #ifdef MSDOSFS_DEBUG 1389 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1390 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1391 #endif 1392 1393 /* 1394 * msdosfs_readdir() won't operate properly on regular files since 1395 * it does i/o only with the filesystem vnode, and hence can 1396 * retrieve the wrong block from the buffer cache for a plain file. 1397 * So, fail attempts to readdir() on a plain file. 1398 */ 1399 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1400 return (ENOTDIR); 1401 1402 /* 1403 * If the user buffer is smaller than the size of one dos directory 1404 * entry or the file offset is not a multiple of the size of a 1405 * directory entry, then we fail the read. 1406 */ 1407 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1408 offset = uio->uio_offset; 1409 if (count < sizeof(struct direntry) || 1410 (offset & (sizeof(struct direntry) - 1))) 1411 return (EINVAL); 1412 lost = uio->uio_resid - count; 1413 uio->uio_resid = count; 1414 uio_off = uio->uio_offset; 1415 1416 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 1417 1418 /* Allocate a temporary dirent buffer. */ 1419 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1420 1421 if (ap->a_ncookies) { 1422 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1423 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1424 *ap->a_cookies = cookies; 1425 } 1426 1427 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1428 1429 /* 1430 * If they are reading from the root directory then, we simulate 1431 * the . and .. entries since these don't exist in the root 1432 * directory. We also set the offset bias to make up for having to 1433 * simulate these entries. By this I mean that at file offset 64 we 1434 * read the first entry in the root directory that lives on disk. 1435 */ 1436 if (dep->de_StartCluster == MSDOSFSROOT 1437 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1438 #if 0 1439 printf("msdosfs_readdir(): going after . or .. in root dir, " 1440 "offset %" PRIu64 "\n", offset); 1441 #endif 1442 bias = 2 * sizeof(struct direntry); 1443 if (offset < bias) { 1444 for (n = (int)offset / sizeof(struct direntry); 1445 n < 2; n++) { 1446 if (FAT32(pmp)) 1447 dirbuf->d_fileno = cntobn(pmp, 1448 (ino_t)pmp->pm_rootdirblk) 1449 * dirsperblk; 1450 else 1451 dirbuf->d_fileno = 1; 1452 dirbuf->d_type = DT_DIR; 1453 switch (n) { 1454 case 0: 1455 dirbuf->d_namlen = 1; 1456 strlcpy(dirbuf->d_name, ".", 1457 sizeof(dirbuf->d_name)); 1458 break; 1459 case 1: 1460 dirbuf->d_namlen = 2; 1461 strlcpy(dirbuf->d_name, "..", 1462 sizeof(dirbuf->d_name)); 1463 break; 1464 } 1465 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1466 if (uio->uio_resid < dirbuf->d_reclen) 1467 goto out; 1468 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1469 if (error) 1470 goto out; 1471 offset += sizeof(struct direntry); 1472 uio_off = offset; 1473 if (cookies) { 1474 *cookies++ = offset; 1475 ncookies++; 1476 if (ncookies >= nc) 1477 goto out; 1478 } 1479 } 1480 } 1481 } 1482 1483 while (uio->uio_resid > 0) { 1484 lbn = de_cluster(pmp, offset - bias); 1485 on = (offset - bias) & pmp->pm_crbomask; 1486 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1487 diff = dep->de_FileSize - (offset - bias); 1488 if (diff <= 0) 1489 break; 1490 n = MIN(n, diff); 1491 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1492 break; 1493 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1494 NOCRED, 0, &bp); 1495 if (error) { 1496 goto bad; 1497 } 1498 n = MIN(n, blsize - bp->b_resid); 1499 1500 /* 1501 * Convert from dos directory entries to fs-independent 1502 * directory entries. 1503 */ 1504 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1505 (char *)dentp < (char *)bp->b_data + on + n; 1506 dentp++, offset += sizeof(struct direntry)) { 1507 #if 0 1508 1509 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1510 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1511 #endif 1512 /* 1513 * If this is an unused entry, we can stop. 1514 */ 1515 if (dentp->deName[0] == SLOT_EMPTY) { 1516 brelse(bp, 0); 1517 goto out; 1518 } 1519 /* 1520 * Skip deleted entries. 1521 */ 1522 if (dentp->deName[0] == SLOT_DELETED) { 1523 chksum = -1; 1524 continue; 1525 } 1526 1527 /* 1528 * Handle Win95 long directory entries 1529 */ 1530 if (dentp->deAttributes == ATTR_WIN95) { 1531 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1532 continue; 1533 chksum = win2unixfn((struct winentry *)dentp, 1534 dirbuf, chksum); 1535 continue; 1536 } 1537 1538 /* 1539 * Skip volume labels 1540 */ 1541 if (dentp->deAttributes & ATTR_VOLUME) { 1542 chksum = -1; 1543 continue; 1544 } 1545 /* 1546 * This computation of d_fileno must match 1547 * the computation of va_fileid in 1548 * msdosfs_getattr. 1549 */ 1550 if (dentp->deAttributes & ATTR_DIRECTORY) { 1551 fileno = getushort(dentp->deStartCluster); 1552 if (FAT32(pmp)) 1553 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1554 /* if this is the root directory */ 1555 if (fileno == MSDOSFSROOT) 1556 if (FAT32(pmp)) 1557 fileno = cntobn(pmp, 1558 (ino_t)pmp->pm_rootdirblk) 1559 * dirsperblk; 1560 else 1561 fileno = 1; 1562 else 1563 fileno = cntobn(pmp, fileno) * dirsperblk; 1564 dirbuf->d_fileno = fileno; 1565 dirbuf->d_type = DT_DIR; 1566 } else { 1567 dirbuf->d_fileno = 1568 offset / sizeof(struct direntry); 1569 dirbuf->d_type = DT_REG; 1570 } 1571 if (chksum != winChksum(dentp->deName)) 1572 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1573 (u_char *)dirbuf->d_name, 1574 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1575 else 1576 dirbuf->d_name[dirbuf->d_namlen] = 0; 1577 chksum = -1; 1578 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1579 if (uio->uio_resid < dirbuf->d_reclen) { 1580 brelse(bp, 0); 1581 goto out; 1582 } 1583 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1584 if (error) { 1585 brelse(bp, 0); 1586 goto out; 1587 } 1588 uio_off = offset + sizeof(struct direntry); 1589 if (cookies) { 1590 *cookies++ = offset + sizeof(struct direntry); 1591 ncookies++; 1592 if (ncookies >= nc) { 1593 brelse(bp, 0); 1594 goto out; 1595 } 1596 } 1597 } 1598 brelse(bp, 0); 1599 } 1600 1601 out: 1602 uio->uio_offset = uio_off; 1603 uio->uio_resid += lost; 1604 if (dep->de_FileSize - (offset - bias) <= 0) 1605 *ap->a_eofflag = 1; 1606 else 1607 *ap->a_eofflag = 0; 1608 1609 if (ap->a_ncookies) { 1610 if (error) { 1611 free(*ap->a_cookies, M_TEMP); 1612 *ap->a_ncookies = 0; 1613 *ap->a_cookies = NULL; 1614 } else 1615 *ap->a_ncookies = ncookies; 1616 } 1617 1618 bad: 1619 free(dirbuf, M_MSDOSFSTMP); 1620 fstrans_done(ap->a_vp->v_mount); 1621 return (error); 1622 } 1623 1624 /* 1625 * vp - address of vnode file the file 1626 * bn - which cluster we are interested in mapping to a filesystem block number. 1627 * vpp - returns the vnode for the block special file holding the filesystem 1628 * containing the file of interest 1629 * bnp - address of where to return the filesystem relative block number 1630 */ 1631 int 1632 msdosfs_bmap(void *v) 1633 { 1634 struct vop_bmap_args /* { 1635 struct vnode *a_vp; 1636 daddr_t a_bn; 1637 struct vnode **a_vpp; 1638 daddr_t *a_bnp; 1639 int *a_runp; 1640 } */ *ap = v; 1641 struct denode *dep = VTODE(ap->a_vp); 1642 int run, maxrun; 1643 daddr_t runbn; 1644 int status; 1645 1646 if (ap->a_vpp != NULL) 1647 *ap->a_vpp = dep->de_devvp; 1648 if (ap->a_bnp == NULL) 1649 return (0); 1650 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1651 1652 /* 1653 * From FreeBSD: 1654 * A little kludgy, but we loop calling pcbmap until we 1655 * reach the end of the contiguous piece, or reach MAXPHYS. 1656 * Since it reduces disk I/Os, the "wasted" CPU is put to 1657 * good use (4 to 5 fold sequential read I/O improvement on USB 1658 * drives). 1659 */ 1660 if (ap->a_runp != NULL) { 1661 /* taken from ufs_bmap */ 1662 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1663 dep->de_pmp->pm_maxcluster - ap->a_bn); 1664 for (run = 1; run <= maxrun; run++) { 1665 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1666 != 0 || runbn != 1667 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1668 break; 1669 } 1670 *ap->a_runp = run - 1; 1671 } 1672 1673 /* 1674 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1675 */ 1676 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1677 return status; 1678 } 1679 1680 int 1681 msdosfs_strategy(void *v) 1682 { 1683 struct vop_strategy_args /* { 1684 struct vnode *a_vp; 1685 struct buf *a_bp; 1686 } */ *ap = v; 1687 struct vnode *vp = ap->a_vp; 1688 struct buf *bp = ap->a_bp; 1689 struct denode *dep = VTODE(bp->b_vp); 1690 int error = 0; 1691 1692 if (vp->v_type == VBLK || vp->v_type == VCHR) 1693 panic("msdosfs_strategy: spec"); 1694 /* 1695 * If we don't already know the filesystem relative block number 1696 * then get it using pcbmap(). If pcbmap() returns the block 1697 * number as -1 then we've got a hole in the file. DOS filesystems 1698 * don't allow files with holes, so we shouldn't ever see this. 1699 */ 1700 if (bp->b_blkno == bp->b_lblkno) { 1701 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1702 &bp->b_blkno, 0, 0); 1703 if (error) 1704 bp->b_blkno = -1; 1705 if (bp->b_blkno == -1) 1706 clrbuf(bp); 1707 else 1708 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1709 } 1710 if (bp->b_blkno == -1) { 1711 biodone(bp); 1712 return (error); 1713 } 1714 1715 /* 1716 * Read/write the block from/to the disk that contains the desired 1717 * file block. 1718 */ 1719 1720 vp = dep->de_devvp; 1721 return (VOP_STRATEGY(vp, bp)); 1722 } 1723 1724 int 1725 msdosfs_print(void *v) 1726 { 1727 struct vop_print_args /* { 1728 struct vnode *vp; 1729 } */ *ap = v; 1730 struct denode *dep = VTODE(ap->a_vp); 1731 1732 printf( 1733 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1734 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1735 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1736 (unsigned long long)minor(dep->de_dev)); 1737 printf("\n"); 1738 return (0); 1739 } 1740 1741 int 1742 msdosfs_advlock(void *v) 1743 { 1744 struct vop_advlock_args /* { 1745 struct vnode *a_vp; 1746 void *a_id; 1747 int a_op; 1748 struct flock *a_fl; 1749 int a_flags; 1750 } */ *ap = v; 1751 struct denode *dep = VTODE(ap->a_vp); 1752 1753 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1754 } 1755 1756 int 1757 msdosfs_pathconf(void *v) 1758 { 1759 struct vop_pathconf_args /* { 1760 struct vnode *a_vp; 1761 int a_name; 1762 register_t *a_retval; 1763 } */ *ap = v; 1764 1765 switch (ap->a_name) { 1766 case _PC_LINK_MAX: 1767 *ap->a_retval = 1; 1768 return (0); 1769 case _PC_NAME_MAX: 1770 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1771 return (0); 1772 case _PC_PATH_MAX: 1773 *ap->a_retval = PATH_MAX; 1774 return (0); 1775 case _PC_CHOWN_RESTRICTED: 1776 *ap->a_retval = 1; 1777 return (0); 1778 case _PC_NO_TRUNC: 1779 *ap->a_retval = 1; 1780 return (0); 1781 case _PC_SYNC_IO: 1782 *ap->a_retval = 1; 1783 return (0); 1784 case _PC_FILESIZEBITS: 1785 *ap->a_retval = 32; 1786 return (0); 1787 default: 1788 return (EINVAL); 1789 } 1790 /* NOTREACHED */ 1791 } 1792 1793 int 1794 msdosfs_fsync(void *v) 1795 { 1796 struct vop_fsync_args /* { 1797 struct vnode *a_vp; 1798 kauth_cred_t a_cred; 1799 int a_flags; 1800 off_t offlo; 1801 off_t offhi; 1802 } */ *ap = v; 1803 struct vnode *vp = ap->a_vp; 1804 int wait; 1805 int error; 1806 1807 fstrans_start(vp->v_mount, FSTRANS_LAZY); 1808 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1809 error = vflushbuf(vp, ap->a_flags); 1810 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 1811 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1812 1813 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1814 struct denode *dep = VTODE(vp); 1815 struct vnode *devvp = dep->de_devvp; 1816 1817 int l = 0; 1818 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1819 curlwp->l_cred); 1820 } 1821 fstrans_done(vp->v_mount); 1822 1823 return (error); 1824 } 1825 1826 void 1827 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1828 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1829 { 1830 struct timespec *ts = NULL, tsb; 1831 1832 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1833 /* XXX just call getnanotime early and use result if needed? */ 1834 dep->de_flag |= DE_MODIFIED; 1835 if (dep->de_flag & DE_UPDATE) { 1836 if (mod == NULL) { 1837 getnanotime(&tsb); 1838 mod = ts = &tsb; 1839 } 1840 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1841 dep->de_Attributes |= ATTR_ARCHIVE; 1842 } 1843 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1844 if (dep->de_flag & DE_ACCESS) { 1845 if (acc == NULL) 1846 acc = ts == NULL ? 1847 (getnanotime(&tsb), ts = &tsb) : ts; 1848 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1849 } 1850 if (dep->de_flag & DE_CREATE) { 1851 if (cre == NULL) 1852 cre = ts == NULL ? 1853 (getnanotime(&tsb), ts = &tsb) : ts; 1854 unix2dostime(cre, gmtoff, &dep->de_CDate, 1855 &dep->de_CTime, &dep->de_CHun); 1856 } 1857 } 1858 1859 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1860 } 1861 1862 /* Global vfs data structures for msdosfs */ 1863 int (**msdosfs_vnodeop_p)(void *); 1864 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1865 { &vop_default_desc, vn_default_error }, 1866 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1867 { &vop_create_desc, msdosfs_create }, /* create */ 1868 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 1869 { &vop_open_desc, genfs_nullop }, /* open */ 1870 { &vop_close_desc, msdosfs_close }, /* close */ 1871 { &vop_access_desc, msdosfs_access }, /* access */ 1872 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1873 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1874 { &vop_read_desc, msdosfs_read }, /* read */ 1875 { &vop_write_desc, msdosfs_write }, /* write */ 1876 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1877 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1878 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1879 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1880 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1881 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1882 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1883 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1884 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1885 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 1886 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1887 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1888 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1889 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 1890 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1891 { &vop_readlink_desc, genfs_einval }, /* readlink */ 1892 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1893 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1894 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1895 { &vop_lock_desc, genfs_lock }, /* lock */ 1896 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1897 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1898 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1899 { &vop_print_desc, msdosfs_print }, /* print */ 1900 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1901 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1902 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1903 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1904 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1905 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1906 { NULL, NULL } 1907 }; 1908 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1909 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1910