1 /* $NetBSD: msdosfs_vnops.c,v 1.75 2011/04/26 11:32:38 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 1.75 2011/04/26 11:32:38 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_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 return genfs_can_access(vp->v_type, 225 file_mode & (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask), 226 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_mode |= S_ARCH1; 309 vap->va_gen = 0; 310 vap->va_blocksize = pmp->pm_bpcluster; 311 vap->va_bytes = 312 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 313 vap->va_type = ap->a_vp->v_type; 314 fstrans_done(ap->a_vp->v_mount); 315 return (0); 316 } 317 318 int 319 msdosfs_setattr(void *v) 320 { 321 struct vop_setattr_args /* { 322 struct vnode *a_vp; 323 struct vattr *a_vap; 324 kauth_cred_t a_cred; 325 } */ *ap = v; 326 int error = 0, de_changed = 0; 327 struct denode *dep = VTODE(ap->a_vp); 328 struct msdosfsmount *pmp = dep->de_pmp; 329 struct vnode *vp = ap->a_vp; 330 struct vattr *vap = ap->a_vap; 331 kauth_cred_t cred = ap->a_cred; 332 333 #ifdef MSDOSFS_DEBUG 334 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 335 ap->a_vp, vap, cred); 336 #endif 337 /* 338 * Note we silently ignore uid or gid changes. 339 */ 340 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 341 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 342 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 343 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 344 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 345 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 346 #ifdef MSDOSFS_DEBUG 347 printf("msdosfs_setattr(): returning EINVAL\n"); 348 printf(" va_type %d, va_nlink %x, va_fsid %"PRIx64", va_fileid %llx\n", 349 vap->va_type, vap->va_nlink, vap->va_fsid, 350 (unsigned long long)vap->va_fileid); 351 printf(" va_blocksize %lx, va_rdev %"PRIx64", va_bytes %"PRIx64", va_gen %lx\n", 352 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 353 #endif 354 return (EINVAL); 355 } 356 /* 357 * Silently ignore attributes modifications on directories. 358 */ 359 if (ap->a_vp->v_type == VDIR) 360 return 0; 361 362 fstrans_start(vp->v_mount, FSTRANS_SHARED); 363 if (vap->va_size != VNOVAL) { 364 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 365 error = EROFS; 366 goto bad; 367 } 368 error = detrunc(dep, (u_long)vap->va_size, 0, cred); 369 if (error) 370 goto bad; 371 de_changed = 1; 372 } 373 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 374 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 375 error = EROFS; 376 goto bad; 377 } 378 error = genfs_can_chtimes(ap->a_vp, vap->va_vaflags, 379 pmp->pm_uid, cred); 380 if (error) 381 goto bad; 382 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 383 vap->va_atime.tv_sec != VNOVAL) 384 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 385 if (vap->va_mtime.tv_sec != VNOVAL) 386 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 387 dep->de_Attributes |= ATTR_ARCHIVE; 388 dep->de_flag |= DE_MODIFIED; 389 de_changed = 1; 390 } 391 /* 392 * DOS files only have the ability to have their writability 393 * attribute set, so we use the owner write bit to set the readonly 394 * attribute. 395 */ 396 if (vap->va_mode != (mode_t)VNOVAL) { 397 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 398 error = EROFS; 399 goto bad; 400 } 401 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 402 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 403 NULL))) 404 goto bad; 405 /* We ignore the read and execute bits. */ 406 if (vap->va_mode & S_IWUSR) 407 dep->de_Attributes &= ~ATTR_READONLY; 408 else 409 dep->de_Attributes |= ATTR_READONLY; 410 dep->de_flag |= DE_MODIFIED; 411 de_changed = 1; 412 } 413 /* 414 * Allow the `archived' bit to be toggled. 415 */ 416 if (vap->va_flags != VNOVAL) { 417 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 418 error = EROFS; 419 goto bad; 420 } 421 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 422 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 423 NULL))) 424 goto bad; 425 if (vap->va_flags & SF_ARCHIVED) 426 dep->de_Attributes &= ~ATTR_ARCHIVE; 427 else 428 dep->de_Attributes |= ATTR_ARCHIVE; 429 dep->de_flag |= DE_MODIFIED; 430 de_changed = 1; 431 } 432 433 if (de_changed) { 434 VN_KNOTE(vp, NOTE_ATTRIB); 435 error = deupdat(dep, 1); 436 if (error) 437 goto bad; 438 } 439 440 bad: 441 fstrans_done(vp->v_mount); 442 return error; 443 } 444 445 int 446 msdosfs_read(void *v) 447 { 448 struct vop_read_args /* { 449 struct vnode *a_vp; 450 struct uio *a_uio; 451 int a_ioflag; 452 kauth_cred_t a_cred; 453 } */ *ap = v; 454 int error = 0; 455 int64_t diff; 456 int blsize; 457 long n; 458 long on; 459 daddr_t lbn; 460 vsize_t bytelen; 461 struct buf *bp; 462 struct vnode *vp = ap->a_vp; 463 struct denode *dep = VTODE(vp); 464 struct msdosfsmount *pmp = dep->de_pmp; 465 struct uio *uio = ap->a_uio; 466 467 /* 468 * If they didn't ask for any data, then we are done. 469 */ 470 471 if (uio->uio_resid == 0) 472 return (0); 473 if (uio->uio_offset < 0) 474 return (EINVAL); 475 if (uio->uio_offset >= dep->de_FileSize) 476 return (0); 477 478 fstrans_start(vp->v_mount, FSTRANS_SHARED); 479 if (vp->v_type == VREG) { 480 const int advice = IO_ADV_DECODE(ap->a_ioflag); 481 482 while (uio->uio_resid > 0) { 483 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 484 uio->uio_resid); 485 486 if (bytelen == 0) 487 break; 488 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 489 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 490 if (error) 491 break; 492 } 493 dep->de_flag |= DE_ACCESS; 494 goto out; 495 } 496 497 /* this loop is only for directories now */ 498 do { 499 lbn = de_cluster(pmp, uio->uio_offset); 500 on = uio->uio_offset & pmp->pm_crbomask; 501 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 502 if (uio->uio_offset >= dep->de_FileSize) 503 return (0); 504 /* file size (and hence diff) may be up to 4GB */ 505 diff = dep->de_FileSize - uio->uio_offset; 506 if (diff < n) 507 n = (long) diff; 508 509 /* convert cluster # to sector # */ 510 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 511 if (error) 512 goto bad; 513 514 /* 515 * If we are operating on a directory file then be sure to 516 * do i/o with the vnode for the filesystem instead of the 517 * vnode for the directory. 518 */ 519 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 520 NOCRED, 0, &bp); 521 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 522 if (error) { 523 brelse(bp, 0); 524 goto bad; 525 } 526 error = uiomove((char *)bp->b_data + on, (int) n, uio); 527 brelse(bp, 0); 528 } while (error == 0 && uio->uio_resid > 0 && n != 0); 529 530 out: 531 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 532 error = deupdat(dep, 1); 533 bad: 534 fstrans_done(vp->v_mount); 535 return (error); 536 } 537 538 /* 539 * Write data to a file or directory. 540 */ 541 int 542 msdosfs_write(void *v) 543 { 544 struct vop_write_args /* { 545 struct vnode *a_vp; 546 struct uio *a_uio; 547 int a_ioflag; 548 kauth_cred_t a_cred; 549 } */ *ap = v; 550 int resid, extended = 0; 551 int error = 0; 552 int ioflag = ap->a_ioflag; 553 u_long osize; 554 u_long count; 555 vsize_t bytelen; 556 off_t oldoff; 557 size_t rem; 558 struct uio *uio = ap->a_uio; 559 struct vnode *vp = ap->a_vp; 560 struct denode *dep = VTODE(vp); 561 struct msdosfsmount *pmp = dep->de_pmp; 562 kauth_cred_t cred = ap->a_cred; 563 bool async; 564 565 #ifdef MSDOSFS_DEBUG 566 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 567 vp, uio, ioflag, cred); 568 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 569 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 570 #endif 571 572 switch (vp->v_type) { 573 case VREG: 574 if (ioflag & IO_APPEND) 575 uio->uio_offset = dep->de_FileSize; 576 break; 577 case VDIR: 578 return EISDIR; 579 default: 580 panic("msdosfs_write(): bad file type"); 581 } 582 583 if (uio->uio_offset < 0) 584 return (EINVAL); 585 586 if (uio->uio_resid == 0) 587 return (0); 588 589 /* Don't bother to try to write files larger than the fs limit */ 590 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 591 return (EFBIG); 592 593 fstrans_start(vp->v_mount, FSTRANS_SHARED); 594 /* 595 * If the offset we are starting the write at is beyond the end of 596 * the file, then they've done a seek. Unix filesystems allow 597 * files with holes in them, DOS doesn't so we must fill the hole 598 * with zeroed blocks. 599 */ 600 if (uio->uio_offset > dep->de_FileSize) { 601 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) { 602 fstrans_done(vp->v_mount); 603 return (error); 604 } 605 } 606 607 /* 608 * Remember some values in case the write fails. 609 */ 610 async = vp->v_mount->mnt_flag & MNT_ASYNC; 611 resid = uio->uio_resid; 612 osize = dep->de_FileSize; 613 614 /* 615 * If we write beyond the end of the file, extend it to its ultimate 616 * size ahead of the time to hopefully get a contiguous area. 617 */ 618 if (uio->uio_offset + resid > osize) { 619 count = de_clcount(pmp, uio->uio_offset + resid) - 620 de_clcount(pmp, osize); 621 if ((error = extendfile(dep, count, NULL, NULL, 0))) 622 goto errexit; 623 624 dep->de_FileSize = uio->uio_offset + resid; 625 /* hint uvm to not read in extended part */ 626 uvm_vnp_setwritesize(vp, dep->de_FileSize); 627 /* zero out the remainder of the last page */ 628 rem = round_page(dep->de_FileSize) - dep->de_FileSize; 629 if (rem > 0) 630 uvm_vnp_zerorange(vp, (off_t)dep->de_FileSize, rem); 631 extended = 1; 632 } 633 634 do { 635 oldoff = uio->uio_offset; 636 bytelen = uio->uio_resid; 637 638 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 639 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 640 if (error) 641 break; 642 643 /* 644 * flush what we just wrote if necessary. 645 * XXXUBC simplistic async flushing. 646 */ 647 648 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 649 mutex_enter(&vp->v_interlock); 650 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 651 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 652 } 653 } while (error == 0 && uio->uio_resid > 0); 654 655 /* set final size */ 656 uvm_vnp_setsize(vp, dep->de_FileSize); 657 if (error == 0 && ioflag & IO_SYNC) { 658 mutex_enter(&vp->v_interlock); 659 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 660 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 661 } 662 dep->de_flag |= DE_UPDATE; 663 664 /* 665 * If the write failed and they want us to, truncate the file back 666 * to the size it was before the write was attempted. 667 */ 668 errexit: 669 if (resid > uio->uio_resid) 670 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 671 if (error) { 672 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 673 uio->uio_offset -= resid - uio->uio_resid; 674 uio->uio_resid = resid; 675 } else if ((ioflag & IO_SYNC) == IO_SYNC) 676 error = deupdat(dep, 1); 677 fstrans_done(vp->v_mount); 678 KASSERT(vp->v_size == dep->de_FileSize); 679 return (error); 680 } 681 682 int 683 msdosfs_update(struct vnode *vp, const struct timespec *acc, 684 const struct timespec *mod, int flags) 685 { 686 struct buf *bp; 687 struct direntry *dirp; 688 struct denode *dep; 689 int error; 690 691 if (vp->v_mount->mnt_flag & MNT_RDONLY) 692 return (0); 693 dep = VTODE(vp); 694 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 695 if ((dep->de_flag & DE_MODIFIED) == 0) 696 return (0); 697 dep->de_flag &= ~DE_MODIFIED; 698 if (dep->de_Attributes & ATTR_DIRECTORY) 699 return (0); 700 if (dep->de_refcnt <= 0) 701 return (0); 702 error = readde(dep, &bp, &dirp); 703 if (error) 704 return (error); 705 DE_EXTERNALIZE(dirp, dep); 706 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 707 return (bwrite(bp)); 708 else { 709 bdwrite(bp); 710 return (0); 711 } 712 } 713 714 /* 715 * Flush the blocks of a file to disk. 716 * 717 * This function is worthless for vnodes that represent directories. Maybe we 718 * could just do a sync if they try an fsync on a directory file. 719 */ 720 int 721 msdosfs_remove(void *v) 722 { 723 struct vop_remove_args /* { 724 struct vnode *a_dvp; 725 struct vnode *a_vp; 726 struct componentname *a_cnp; 727 } */ *ap = v; 728 struct denode *dep = VTODE(ap->a_vp); 729 struct denode *ddep = VTODE(ap->a_dvp); 730 int error; 731 732 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 733 if (ap->a_vp->v_type == VDIR) 734 error = EPERM; 735 else 736 error = removede(ddep, dep); 737 #ifdef MSDOSFS_DEBUG 738 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 739 dep, ap->a_vp->v_usecount); 740 #endif 741 VN_KNOTE(ap->a_vp, NOTE_DELETE); 742 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 743 if (ddep == dep) 744 vrele(ap->a_vp); 745 else 746 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 747 * via vrele() */ 748 vput(ap->a_dvp); 749 fstrans_done(ap->a_dvp->v_mount); 750 return (error); 751 } 752 753 /* 754 * Renames on files require moving the denode to a new hash queue since the 755 * denode's location is used to compute which hash queue to put the file 756 * in. Unless it is a rename in place. For example "mv a b". 757 * 758 * What follows is the basic algorithm: 759 * 760 * if (file move) { 761 * if (dest file exists) { 762 * remove dest file 763 * } 764 * if (dest and src in same directory) { 765 * rewrite name in existing directory slot 766 * } else { 767 * write new entry in dest directory 768 * update offset and dirclust in denode 769 * move denode to new hash chain 770 * clear old directory entry 771 * } 772 * } else { 773 * directory move 774 * if (dest directory exists) { 775 * if (dest is not empty) { 776 * return ENOTEMPTY 777 * } 778 * remove dest directory 779 * } 780 * if (dest and src in same directory) { 781 * rewrite name in existing entry 782 * } else { 783 * be sure dest is not a child of src directory 784 * write entry in dest directory 785 * update "." and ".." in moved directory 786 * update offset and dirclust in denode 787 * move denode to new hash chain 788 * clear old directory entry for moved directory 789 * } 790 * } 791 * 792 * On entry: 793 * source's parent directory is unlocked 794 * source file or directory is unlocked 795 * destination's parent directory is locked 796 * destination file or directory is locked if it exists 797 * 798 * On exit: 799 * all denodes should be released 800 * 801 * Notes: 802 * I'm not sure how the memory containing the pathnames pointed at by the 803 * componentname structures is freed, there may be some memory bleeding 804 * for each rename done. 805 * 806 * --More-- Notes: 807 * This routine needs help. badly. 808 */ 809 int 810 msdosfs_rename(void *v) 811 { 812 struct vop_rename_args /* { 813 struct vnode *a_fdvp; 814 struct vnode *a_fvp; 815 struct componentname *a_fcnp; 816 struct vnode *a_tdvp; 817 struct vnode *a_tvp; 818 struct componentname *a_tcnp; 819 } */ *ap = v; 820 struct vnode *tvp = ap->a_tvp; 821 struct vnode *tdvp = ap->a_tdvp; 822 struct vnode *fvp = ap->a_fvp; 823 struct vnode *fdvp = ap->a_fdvp; 824 struct componentname *tcnp = ap->a_tcnp; 825 struct componentname *fcnp = ap->a_fcnp; 826 struct denode *ip, *xp, *dp, *zp; 827 u_char toname[12], oldname[12]; 828 u_long from_diroffset, to_diroffset; 829 u_char to_count; 830 int doingdirectory = 0, newparent = 0; 831 int error; 832 u_long cn; 833 daddr_t bn; 834 struct msdosfsmount *pmp; 835 struct direntry *dotdotp; 836 struct buf *bp; 837 838 pmp = VFSTOMSDOSFS(fdvp->v_mount); 839 840 /* 841 * Check for cross-device rename. 842 */ 843 if ((fvp->v_mount != tdvp->v_mount) || 844 (tvp && (fvp->v_mount != tvp->v_mount))) { 845 error = EXDEV; 846 abortit: 847 VOP_ABORTOP(tdvp, tcnp); 848 if (tdvp == tvp) 849 vrele(tdvp); 850 else 851 vput(tdvp); 852 if (tvp) 853 vput(tvp); 854 VOP_ABORTOP(fdvp, fcnp); 855 vrele(fdvp); 856 vrele(fvp); 857 return (error); 858 } 859 860 /* 861 * If source and dest are the same, do nothing. 862 */ 863 if (tvp == fvp) { 864 error = 0; 865 goto abortit; 866 } 867 868 /* 869 * XXX: This can deadlock since we hold tdvp/tvp locked. 870 * But I'm not going to fix it now. 871 */ 872 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 873 goto abortit; 874 dp = VTODE(fdvp); 875 ip = VTODE(fvp); 876 877 /* 878 * Be sure we are not renaming ".", "..", or an alias of ".". This 879 * leads to a crippled directory tree. It's pretty tough to do a 880 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 881 * doesn't work if the ".." entry is missing. 882 */ 883 if (ip->de_Attributes & ATTR_DIRECTORY) { 884 /* 885 * Avoid ".", "..", and aliases of "." for obvious reasons. 886 */ 887 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 888 dp == ip || 889 (fcnp->cn_flags & ISDOTDOT) || 890 (tcnp->cn_flags & ISDOTDOT) || 891 (ip->de_flag & DE_RENAME)) { 892 VOP_UNLOCK(fvp); 893 error = EINVAL; 894 goto abortit; 895 } 896 ip->de_flag |= DE_RENAME; 897 doingdirectory++; 898 } 899 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 900 901 fstrans_start(fdvp->v_mount, FSTRANS_SHARED); 902 /* 903 * When the target exists, both the directory 904 * and target vnodes are returned locked. 905 */ 906 dp = VTODE(tdvp); 907 xp = tvp ? VTODE(tvp) : NULL; 908 /* 909 * Remember direntry place to use for destination 910 */ 911 to_diroffset = dp->de_fndoffset; 912 to_count = dp->de_fndcnt; 913 914 /* 915 * If ".." must be changed (ie the directory gets a new 916 * parent) then the source directory must not be in the 917 * directory hierarchy above the target, as this would 918 * orphan everything below the source directory. Also 919 * the user must have write permission in the source so 920 * as to be able to change "..". We must repeat the call 921 * to namei, as the parent directory is unlocked by the 922 * call to doscheckpath(). 923 */ 924 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 925 VOP_UNLOCK(fvp); 926 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 927 newparent = 1; 928 929 if (doingdirectory && newparent) { 930 if (error) /* write access check above */ 931 goto tdvpbad; 932 if (xp != NULL) 933 vput(tvp); 934 tvp = NULL; 935 /* 936 * doscheckpath() vput()'s tdvp (dp == VTODE(tdvp)), 937 * so we have to get an extra ref to it first, and 938 * because it's been unlocked we need to do a relookup 939 * afterwards in case tvp has changed. 940 */ 941 vref(tdvp); 942 if ((error = doscheckpath(ip, dp)) != 0) 943 goto bad; 944 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 945 if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) { 946 VOP_UNLOCK(tdvp); 947 goto bad; 948 } 949 dp = VTODE(tdvp); 950 xp = tvp ? VTODE(tvp) : NULL; 951 } 952 953 if (xp != NULL) { 954 /* 955 * Target must be empty if a directory and have no links 956 * to it. Also, ensure source and target are compatible 957 * (both directories, or both not directories). 958 */ 959 if (xp->de_Attributes & ATTR_DIRECTORY) { 960 if (!dosdirempty(xp)) { 961 error = ENOTEMPTY; 962 goto tdvpbad; 963 } 964 if (!doingdirectory) { 965 error = ENOTDIR; 966 goto tdvpbad; 967 } 968 } else if (doingdirectory) { 969 error = EISDIR; 970 goto tdvpbad; 971 } 972 if ((error = removede(dp, xp)) != 0) 973 goto tdvpbad; 974 VN_KNOTE(tdvp, NOTE_WRITE); 975 VN_KNOTE(tvp, NOTE_DELETE); 976 cache_purge(tvp); 977 vput(tvp); 978 tvp = NULL; 979 xp = NULL; 980 } 981 982 /* 983 * Convert the filename in tcnp into a dos filename. We copy this 984 * into the denode and directory entry for the destination 985 * file/directory. 986 */ 987 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) { 988 fstrans_done(fdvp->v_mount); 989 goto abortit; 990 } 991 992 /* 993 * Since from wasn't locked at various places above, 994 * have to do a relookup here. 995 */ 996 fcnp->cn_flags &= ~MODMASK; 997 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 998 VOP_UNLOCK(tdvp); 999 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1000 if ((error = relookup(fdvp, &fvp, fcnp, 0))) { 1001 VOP_UNLOCK(fdvp); 1002 vrele(ap->a_fvp); 1003 vrele(tdvp); 1004 fstrans_done(fdvp->v_mount); 1005 return (error); 1006 } 1007 if (fvp == NULL) { 1008 /* 1009 * From name has disappeared. 1010 */ 1011 if (doingdirectory) 1012 panic("rename: lost dir entry"); 1013 vput(fdvp); 1014 vrele(ap->a_fvp); 1015 vrele(tdvp); 1016 fstrans_done(fdvp->v_mount); 1017 return 0; 1018 } 1019 VOP_UNLOCK(fdvp); 1020 xp = VTODE(fvp); 1021 zp = VTODE(fdvp); 1022 from_diroffset = zp->de_fndoffset; 1023 1024 /* 1025 * Ensure that the directory entry still exists and has not 1026 * changed till now. If the source is a file the entry may 1027 * have been unlinked or renamed. In either case there is 1028 * no further work to be done. If the source is a directory 1029 * then it cannot have been rmdir'ed or renamed; this is 1030 * prohibited by the DE_RENAME flag. 1031 */ 1032 if (xp != ip) { 1033 if (doingdirectory) 1034 panic("rename: lost dir entry"); 1035 vrele(ap->a_fvp); 1036 xp = NULL; 1037 } else { 1038 vrele(fvp); 1039 xp = NULL; 1040 1041 /* 1042 * First write a new entry in the destination 1043 * directory and mark the entry in the source directory 1044 * as deleted. Then move the denode to the correct hash 1045 * chain for its new location in the filesystem. And, if 1046 * we moved a directory, then update its .. entry to point 1047 * to the new parent directory. 1048 */ 1049 memcpy(oldname, ip->de_Name, 11); 1050 memcpy(ip->de_Name, toname, 11); /* update denode */ 1051 dp->de_fndoffset = to_diroffset; 1052 dp->de_fndcnt = to_count; 1053 error = createde(ip, dp, (struct denode **)0, tcnp); 1054 if (error) { 1055 memcpy(ip->de_Name, oldname, 11); 1056 VOP_UNLOCK(fvp); 1057 goto bad; 1058 } 1059 ip->de_refcnt++; 1060 zp->de_fndoffset = from_diroffset; 1061 if ((error = removede(zp, ip)) != 0) { 1062 /* XXX should really panic here, fs is corrupt */ 1063 VOP_UNLOCK(fvp); 1064 goto bad; 1065 } 1066 cache_purge(fvp); 1067 if (!doingdirectory) { 1068 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1069 &ip->de_dirclust, 0); 1070 if (error) { 1071 /* XXX should really panic here, fs is corrupt */ 1072 VOP_UNLOCK(fvp); 1073 goto bad; 1074 } 1075 ip->de_diroffset = to_diroffset; 1076 if (ip->de_dirclust != MSDOSFSROOT) 1077 ip->de_diroffset &= pmp->pm_crbomask; 1078 } 1079 reinsert(ip); 1080 } 1081 1082 /* 1083 * If we moved a directory to a new parent directory, then we must 1084 * fixup the ".." entry in the moved directory. 1085 */ 1086 if (doingdirectory && newparent) { 1087 cn = ip->de_StartCluster; 1088 if (cn == MSDOSFSROOT) { 1089 /* this should never happen */ 1090 panic("msdosfs_rename: updating .. in root directory?"); 1091 } else 1092 bn = cntobn(pmp, cn); 1093 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1094 pmp->pm_bpcluster, NOCRED, B_MODIFY, &bp); 1095 if (error) { 1096 /* XXX should really panic here, fs is corrupt */ 1097 brelse(bp, 0); 1098 VOP_UNLOCK(fvp); 1099 goto bad; 1100 } 1101 dotdotp = (struct direntry *)bp->b_data + 1; 1102 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1103 if (FAT32(pmp)) { 1104 putushort(dotdotp->deHighClust, 1105 dp->de_StartCluster >> 16); 1106 } else { 1107 putushort(dotdotp->deHighClust, 0); 1108 } 1109 if ((error = bwrite(bp)) != 0) { 1110 /* XXX should really panic here, fs is corrupt */ 1111 VOP_UNLOCK(fvp); 1112 goto bad; 1113 } 1114 } 1115 1116 VN_KNOTE(fvp, NOTE_RENAME); 1117 VOP_UNLOCK(fvp); 1118 bad: 1119 if (tvp) 1120 vput(tvp); 1121 vrele(tdvp); 1122 ip->de_flag &= ~DE_RENAME; 1123 vrele(fdvp); 1124 vrele(fvp); 1125 fstrans_done(fdvp->v_mount); 1126 return (error); 1127 1128 /* XXX: uuuh */ 1129 tdvpbad: 1130 VOP_UNLOCK(tdvp); 1131 goto bad; 1132 } 1133 1134 static const struct { 1135 struct direntry dot; 1136 struct direntry dotdot; 1137 } dosdirtemplate = { 1138 { ". ", " ", /* the . entry */ 1139 ATTR_DIRECTORY, /* file attribute */ 1140 0, /* reserved */ 1141 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1142 { 0, 0 }, /* access date */ 1143 { 0, 0 }, /* high bits of start cluster */ 1144 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1145 { 0, 0 }, /* startcluster */ 1146 { 0, 0, 0, 0 } /* filesize */ 1147 }, 1148 { ".. ", " ", /* the .. entry */ 1149 ATTR_DIRECTORY, /* file attribute */ 1150 0, /* reserved */ 1151 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1152 { 0, 0 }, /* access date */ 1153 { 0, 0 }, /* high bits of start cluster */ 1154 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1155 { 0, 0 }, /* startcluster */ 1156 { 0, 0, 0, 0 } /* filesize */ 1157 } 1158 }; 1159 1160 int 1161 msdosfs_mkdir(void *v) 1162 { 1163 struct vop_mkdir_args /* { 1164 struct vnode *a_dvp; 1165 struvt vnode **a_vpp; 1166 struvt componentname *a_cnp; 1167 struct vattr *a_vap; 1168 } */ *ap = v; 1169 struct componentname *cnp = ap->a_cnp; 1170 struct denode ndirent; 1171 struct denode *dep; 1172 struct denode *pdep = VTODE(ap->a_dvp); 1173 int error; 1174 int bn; 1175 u_long newcluster, pcl; 1176 daddr_t lbn; 1177 struct direntry *denp; 1178 struct msdosfsmount *pmp = pdep->de_pmp; 1179 struct buf *bp; 1180 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1181 1182 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1183 /* 1184 * If this is the root directory and there is no space left we 1185 * can't do anything. This is because the root directory can not 1186 * change size. 1187 */ 1188 if (pdep->de_StartCluster == MSDOSFSROOT 1189 && pdep->de_fndoffset >= pdep->de_FileSize) { 1190 error = ENOSPC; 1191 goto bad2; 1192 } 1193 1194 /* 1195 * Allocate a cluster to hold the about to be created directory. 1196 */ 1197 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1198 if (error) 1199 goto bad2; 1200 1201 memset(&ndirent, 0, sizeof(ndirent)); 1202 ndirent.de_pmp = pmp; 1203 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1204 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1205 1206 /* 1207 * Now fill the cluster with the "." and ".." entries. And write 1208 * the cluster to disk. This way it is there for the parent 1209 * directory to be pointing at if there were a crash. 1210 */ 1211 bn = cntobn(pmp, newcluster); 1212 lbn = de_bn2kb(pmp, bn); 1213 /* always succeeds */ 1214 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1215 memset(bp->b_data, 0, pmp->pm_bpcluster); 1216 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1217 denp = (struct direntry *)bp->b_data; 1218 putushort(denp[0].deStartCluster, newcluster); 1219 putushort(denp[0].deCDate, ndirent.de_CDate); 1220 putushort(denp[0].deCTime, ndirent.de_CTime); 1221 denp[0].deCHundredth = ndirent.de_CHun; 1222 putushort(denp[0].deADate, ndirent.de_ADate); 1223 putushort(denp[0].deMDate, ndirent.de_MDate); 1224 putushort(denp[0].deMTime, ndirent.de_MTime); 1225 pcl = pdep->de_StartCluster; 1226 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1227 pcl = 0; 1228 putushort(denp[1].deStartCluster, pcl); 1229 putushort(denp[1].deCDate, ndirent.de_CDate); 1230 putushort(denp[1].deCTime, ndirent.de_CTime); 1231 denp[1].deCHundredth = ndirent.de_CHun; 1232 putushort(denp[1].deADate, ndirent.de_ADate); 1233 putushort(denp[1].deMDate, ndirent.de_MDate); 1234 putushort(denp[1].deMTime, ndirent.de_MTime); 1235 if (FAT32(pmp)) { 1236 putushort(denp[0].deHighClust, newcluster >> 16); 1237 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1238 } else { 1239 putushort(denp[0].deHighClust, 0); 1240 putushort(denp[1].deHighClust, 0); 1241 } 1242 1243 if (async) 1244 bdwrite(bp); 1245 else if ((error = bwrite(bp)) != 0) 1246 goto bad; 1247 1248 /* 1249 * Now build up a directory entry pointing to the newly allocated 1250 * cluster. This will be written to an empty slot in the parent 1251 * directory. 1252 */ 1253 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1254 goto bad; 1255 1256 ndirent.de_Attributes = ATTR_DIRECTORY; 1257 ndirent.de_StartCluster = newcluster; 1258 ndirent.de_FileSize = 0; 1259 ndirent.de_dev = pdep->de_dev; 1260 ndirent.de_devvp = pdep->de_devvp; 1261 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1262 goto bad; 1263 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1264 vput(ap->a_dvp); 1265 *ap->a_vpp = DETOV(dep); 1266 fstrans_done(ap->a_dvp->v_mount); 1267 return (0); 1268 1269 bad: 1270 clusterfree(pmp, newcluster, NULL); 1271 bad2: 1272 vput(ap->a_dvp); 1273 fstrans_done(ap->a_dvp->v_mount); 1274 return (error); 1275 } 1276 1277 int 1278 msdosfs_rmdir(void *v) 1279 { 1280 struct vop_rmdir_args /* { 1281 struct vnode *a_dvp; 1282 struct vnode *a_vp; 1283 struct componentname *a_cnp; 1284 } */ *ap = v; 1285 struct vnode *vp = ap->a_vp; 1286 struct vnode *dvp = ap->a_dvp; 1287 struct componentname *cnp = ap->a_cnp; 1288 struct denode *ip, *dp; 1289 int error; 1290 1291 ip = VTODE(vp); 1292 dp = VTODE(dvp); 1293 /* 1294 * No rmdir "." please. 1295 */ 1296 if (dp == ip) { 1297 vrele(dvp); 1298 vput(vp); 1299 return (EINVAL); 1300 } 1301 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1302 /* 1303 * Verify the directory is empty (and valid). 1304 * (Rmdir ".." won't be valid since 1305 * ".." will contain a reference to 1306 * the current directory and thus be 1307 * non-empty.) 1308 */ 1309 error = 0; 1310 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1311 error = ENOTEMPTY; 1312 goto out; 1313 } 1314 /* 1315 * Delete the entry from the directory. For dos filesystems this 1316 * gets rid of the directory entry on disk, the in memory copy 1317 * still exists but the de_refcnt is <= 0. This prevents it from 1318 * being found by deget(). When the vput() on dep is done we give 1319 * up access and eventually msdosfs_reclaim() will be called which 1320 * will remove it from the denode cache. 1321 */ 1322 if ((error = removede(dp, ip)) != 0) 1323 goto out; 1324 /* 1325 * This is where we decrement the link count in the parent 1326 * directory. Since dos filesystems don't do this we just purge 1327 * the name cache and let go of the parent directory denode. 1328 */ 1329 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1330 cache_purge(dvp); 1331 vput(dvp); 1332 dvp = NULL; 1333 /* 1334 * Truncate the directory that is being deleted. 1335 */ 1336 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1337 cache_purge(vp); 1338 out: 1339 VN_KNOTE(vp, NOTE_DELETE); 1340 if (dvp) 1341 vput(dvp); 1342 vput(vp); 1343 fstrans_done(ap->a_dvp->v_mount); 1344 return (error); 1345 } 1346 1347 int 1348 msdosfs_readdir(void *v) 1349 { 1350 struct vop_readdir_args /* { 1351 struct vnode *a_vp; 1352 struct uio *a_uio; 1353 kauth_cred_t a_cred; 1354 int *a_eofflag; 1355 off_t **a_cookies; 1356 int *a_ncookies; 1357 } */ *ap = v; 1358 int error = 0; 1359 int diff; 1360 long n; 1361 int blsize; 1362 long on; 1363 long lost; 1364 long count; 1365 u_long cn; 1366 ino_t fileno; 1367 u_long dirsperblk; 1368 long bias = 0; 1369 daddr_t bn, lbn; 1370 struct buf *bp; 1371 struct denode *dep = VTODE(ap->a_vp); 1372 struct msdosfsmount *pmp = dep->de_pmp; 1373 struct direntry *dentp; 1374 struct dirent *dirbuf; 1375 struct uio *uio = ap->a_uio; 1376 off_t *cookies = NULL; 1377 int ncookies = 0, nc = 0; 1378 off_t offset, uio_off; 1379 int chksum = -1; 1380 1381 #ifdef MSDOSFS_DEBUG 1382 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1383 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1384 #endif 1385 1386 /* 1387 * msdosfs_readdir() won't operate properly on regular files since 1388 * it does i/o only with the filesystem vnode, and hence can 1389 * retrieve the wrong block from the buffer cache for a plain file. 1390 * So, fail attempts to readdir() on a plain file. 1391 */ 1392 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1393 return (ENOTDIR); 1394 1395 /* 1396 * If the user buffer is smaller than the size of one dos directory 1397 * entry or the file offset is not a multiple of the size of a 1398 * directory entry, then we fail the read. 1399 */ 1400 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1401 offset = uio->uio_offset; 1402 if (count < sizeof(struct direntry) || 1403 (offset & (sizeof(struct direntry) - 1))) 1404 return (EINVAL); 1405 lost = uio->uio_resid - count; 1406 uio->uio_resid = count; 1407 uio_off = uio->uio_offset; 1408 1409 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 1410 1411 /* Allocate a temporary dirent buffer. */ 1412 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1413 1414 if (ap->a_ncookies) { 1415 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1416 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1417 *ap->a_cookies = cookies; 1418 } 1419 1420 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1421 1422 /* 1423 * If they are reading from the root directory then, we simulate 1424 * the . and .. entries since these don't exist in the root 1425 * directory. We also set the offset bias to make up for having to 1426 * simulate these entries. By this I mean that at file offset 64 we 1427 * read the first entry in the root directory that lives on disk. 1428 */ 1429 if (dep->de_StartCluster == MSDOSFSROOT 1430 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1431 #if 0 1432 printf("msdosfs_readdir(): going after . or .. in root dir, " 1433 "offset %" PRIu64 "\n", offset); 1434 #endif 1435 bias = 2 * sizeof(struct direntry); 1436 if (offset < bias) { 1437 for (n = (int)offset / sizeof(struct direntry); 1438 n < 2; n++) { 1439 if (FAT32(pmp)) 1440 dirbuf->d_fileno = cntobn(pmp, 1441 (ino_t)pmp->pm_rootdirblk) 1442 * dirsperblk; 1443 else 1444 dirbuf->d_fileno = 1; 1445 dirbuf->d_type = DT_DIR; 1446 switch (n) { 1447 case 0: 1448 dirbuf->d_namlen = 1; 1449 strlcpy(dirbuf->d_name, ".", 1450 sizeof(dirbuf->d_name)); 1451 break; 1452 case 1: 1453 dirbuf->d_namlen = 2; 1454 strlcpy(dirbuf->d_name, "..", 1455 sizeof(dirbuf->d_name)); 1456 break; 1457 } 1458 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1459 if (uio->uio_resid < dirbuf->d_reclen) 1460 goto out; 1461 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1462 if (error) 1463 goto out; 1464 offset += sizeof(struct direntry); 1465 uio_off = offset; 1466 if (cookies) { 1467 *cookies++ = offset; 1468 ncookies++; 1469 if (ncookies >= nc) 1470 goto out; 1471 } 1472 } 1473 } 1474 } 1475 1476 while (uio->uio_resid > 0) { 1477 lbn = de_cluster(pmp, offset - bias); 1478 on = (offset - bias) & pmp->pm_crbomask; 1479 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1480 diff = dep->de_FileSize - (offset - bias); 1481 if (diff <= 0) 1482 break; 1483 n = MIN(n, diff); 1484 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1485 break; 1486 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1487 NOCRED, 0, &bp); 1488 if (error) { 1489 brelse(bp, 0); 1490 goto bad; 1491 } 1492 n = MIN(n, blsize - bp->b_resid); 1493 1494 /* 1495 * Convert from dos directory entries to fs-independent 1496 * directory entries. 1497 */ 1498 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1499 (char *)dentp < (char *)bp->b_data + on + n; 1500 dentp++, offset += sizeof(struct direntry)) { 1501 #if 0 1502 1503 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1504 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1505 #endif 1506 /* 1507 * If this is an unused entry, we can stop. 1508 */ 1509 if (dentp->deName[0] == SLOT_EMPTY) { 1510 brelse(bp, 0); 1511 goto out; 1512 } 1513 /* 1514 * Skip deleted entries. 1515 */ 1516 if (dentp->deName[0] == SLOT_DELETED) { 1517 chksum = -1; 1518 continue; 1519 } 1520 1521 /* 1522 * Handle Win95 long directory entries 1523 */ 1524 if (dentp->deAttributes == ATTR_WIN95) { 1525 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1526 continue; 1527 chksum = win2unixfn((struct winentry *)dentp, 1528 dirbuf, chksum); 1529 continue; 1530 } 1531 1532 /* 1533 * Skip volume labels 1534 */ 1535 if (dentp->deAttributes & ATTR_VOLUME) { 1536 chksum = -1; 1537 continue; 1538 } 1539 /* 1540 * This computation of d_fileno must match 1541 * the computation of va_fileid in 1542 * msdosfs_getattr. 1543 */ 1544 if (dentp->deAttributes & ATTR_DIRECTORY) { 1545 fileno = getushort(dentp->deStartCluster); 1546 if (FAT32(pmp)) 1547 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1548 /* if this is the root directory */ 1549 if (fileno == MSDOSFSROOT) 1550 if (FAT32(pmp)) 1551 fileno = cntobn(pmp, 1552 (ino_t)pmp->pm_rootdirblk) 1553 * dirsperblk; 1554 else 1555 fileno = 1; 1556 else 1557 fileno = cntobn(pmp, fileno) * dirsperblk; 1558 dirbuf->d_fileno = fileno; 1559 dirbuf->d_type = DT_DIR; 1560 } else { 1561 dirbuf->d_fileno = 1562 offset / sizeof(struct direntry); 1563 dirbuf->d_type = DT_REG; 1564 } 1565 if (chksum != winChksum(dentp->deName)) 1566 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1567 (u_char *)dirbuf->d_name, 1568 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1569 else 1570 dirbuf->d_name[dirbuf->d_namlen] = 0; 1571 chksum = -1; 1572 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1573 if (uio->uio_resid < dirbuf->d_reclen) { 1574 brelse(bp, 0); 1575 goto out; 1576 } 1577 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1578 if (error) { 1579 brelse(bp, 0); 1580 goto out; 1581 } 1582 uio_off = offset + sizeof(struct direntry); 1583 if (cookies) { 1584 *cookies++ = offset + sizeof(struct direntry); 1585 ncookies++; 1586 if (ncookies >= nc) { 1587 brelse(bp, 0); 1588 goto out; 1589 } 1590 } 1591 } 1592 brelse(bp, 0); 1593 } 1594 1595 out: 1596 uio->uio_offset = uio_off; 1597 uio->uio_resid += lost; 1598 if (dep->de_FileSize - (offset - bias) <= 0) 1599 *ap->a_eofflag = 1; 1600 else 1601 *ap->a_eofflag = 0; 1602 1603 if (ap->a_ncookies) { 1604 if (error) { 1605 free(*ap->a_cookies, M_TEMP); 1606 *ap->a_ncookies = 0; 1607 *ap->a_cookies = NULL; 1608 } else 1609 *ap->a_ncookies = ncookies; 1610 } 1611 1612 bad: 1613 free(dirbuf, M_MSDOSFSTMP); 1614 fstrans_done(ap->a_vp->v_mount); 1615 return (error); 1616 } 1617 1618 /* 1619 * vp - address of vnode file the file 1620 * bn - which cluster we are interested in mapping to a filesystem block number. 1621 * vpp - returns the vnode for the block special file holding the filesystem 1622 * containing the file of interest 1623 * bnp - address of where to return the filesystem relative block number 1624 */ 1625 int 1626 msdosfs_bmap(void *v) 1627 { 1628 struct vop_bmap_args /* { 1629 struct vnode *a_vp; 1630 daddr_t a_bn; 1631 struct vnode **a_vpp; 1632 daddr_t *a_bnp; 1633 int *a_runp; 1634 } */ *ap = v; 1635 struct denode *dep = VTODE(ap->a_vp); 1636 int run, maxrun; 1637 daddr_t runbn; 1638 int status; 1639 1640 if (ap->a_vpp != NULL) 1641 *ap->a_vpp = dep->de_devvp; 1642 if (ap->a_bnp == NULL) 1643 return (0); 1644 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1645 1646 /* 1647 * From FreeBSD: 1648 * A little kludgy, but we loop calling pcbmap until we 1649 * reach the end of the contiguous piece, or reach MAXPHYS. 1650 * Since it reduces disk I/Os, the "wasted" CPU is put to 1651 * good use (4 to 5 fold sequential read I/O improvement on USB 1652 * drives). 1653 */ 1654 if (ap->a_runp != NULL) { 1655 /* taken from ufs_bmap */ 1656 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1657 dep->de_pmp->pm_maxcluster - ap->a_bn); 1658 for (run = 1; run <= maxrun; run++) { 1659 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1660 != 0 || runbn != 1661 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1662 break; 1663 } 1664 *ap->a_runp = run - 1; 1665 } 1666 1667 /* 1668 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1669 */ 1670 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1671 return status; 1672 } 1673 1674 int 1675 msdosfs_strategy(void *v) 1676 { 1677 struct vop_strategy_args /* { 1678 struct vnode *a_vp; 1679 struct buf *a_bp; 1680 } */ *ap = v; 1681 struct vnode *vp = ap->a_vp; 1682 struct buf *bp = ap->a_bp; 1683 struct denode *dep = VTODE(bp->b_vp); 1684 int error = 0; 1685 1686 if (vp->v_type == VBLK || vp->v_type == VCHR) 1687 panic("msdosfs_strategy: spec"); 1688 /* 1689 * If we don't already know the filesystem relative block number 1690 * then get it using pcbmap(). If pcbmap() returns the block 1691 * number as -1 then we've got a hole in the file. DOS filesystems 1692 * don't allow files with holes, so we shouldn't ever see this. 1693 */ 1694 if (bp->b_blkno == bp->b_lblkno) { 1695 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1696 &bp->b_blkno, 0, 0); 1697 if (error) 1698 bp->b_blkno = -1; 1699 if (bp->b_blkno == -1) 1700 clrbuf(bp); 1701 else 1702 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1703 } 1704 if (bp->b_blkno == -1) { 1705 biodone(bp); 1706 return (error); 1707 } 1708 1709 /* 1710 * Read/write the block from/to the disk that contains the desired 1711 * file block. 1712 */ 1713 1714 vp = dep->de_devvp; 1715 return (VOP_STRATEGY(vp, bp)); 1716 } 1717 1718 int 1719 msdosfs_print(void *v) 1720 { 1721 struct vop_print_args /* { 1722 struct vnode *vp; 1723 } */ *ap = v; 1724 struct denode *dep = VTODE(ap->a_vp); 1725 1726 printf( 1727 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1728 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1729 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1730 (unsigned long long)minor(dep->de_dev)); 1731 printf("\n"); 1732 return (0); 1733 } 1734 1735 int 1736 msdosfs_advlock(void *v) 1737 { 1738 struct vop_advlock_args /* { 1739 struct vnode *a_vp; 1740 void *a_id; 1741 int a_op; 1742 struct flock *a_fl; 1743 int a_flags; 1744 } */ *ap = v; 1745 struct denode *dep = VTODE(ap->a_vp); 1746 1747 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1748 } 1749 1750 int 1751 msdosfs_pathconf(void *v) 1752 { 1753 struct vop_pathconf_args /* { 1754 struct vnode *a_vp; 1755 int a_name; 1756 register_t *a_retval; 1757 } */ *ap = v; 1758 1759 switch (ap->a_name) { 1760 case _PC_LINK_MAX: 1761 *ap->a_retval = 1; 1762 return (0); 1763 case _PC_NAME_MAX: 1764 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1765 return (0); 1766 case _PC_PATH_MAX: 1767 *ap->a_retval = PATH_MAX; 1768 return (0); 1769 case _PC_CHOWN_RESTRICTED: 1770 *ap->a_retval = 1; 1771 return (0); 1772 case _PC_NO_TRUNC: 1773 *ap->a_retval = 0; 1774 return (0); 1775 case _PC_SYNC_IO: 1776 *ap->a_retval = 1; 1777 return (0); 1778 case _PC_FILESIZEBITS: 1779 *ap->a_retval = 32; 1780 return (0); 1781 default: 1782 return (EINVAL); 1783 } 1784 /* NOTREACHED */ 1785 } 1786 1787 int 1788 msdosfs_fsync(void *v) 1789 { 1790 struct vop_fsync_args /* { 1791 struct vnode *a_vp; 1792 kauth_cred_t a_cred; 1793 int a_flags; 1794 off_t offlo; 1795 off_t offhi; 1796 } */ *ap = v; 1797 struct vnode *vp = ap->a_vp; 1798 int wait; 1799 int error; 1800 1801 fstrans_start(vp->v_mount, FSTRANS_LAZY); 1802 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1803 error = vflushbuf(vp, wait); 1804 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 1805 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1806 1807 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1808 struct denode *dep = VTODE(vp); 1809 struct vnode *devvp = dep->de_devvp; 1810 1811 int l = 0; 1812 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1813 curlwp->l_cred); 1814 } 1815 fstrans_done(vp->v_mount); 1816 1817 return (error); 1818 } 1819 1820 void 1821 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1822 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1823 { 1824 struct timespec *ts = NULL, tsb; 1825 1826 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1827 /* XXX just call getnanotime early and use result if needed? */ 1828 dep->de_flag |= DE_MODIFIED; 1829 if (dep->de_flag & DE_UPDATE) { 1830 if (mod == NULL) { 1831 getnanotime(&tsb); 1832 mod = ts = &tsb; 1833 } 1834 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1835 dep->de_Attributes |= ATTR_ARCHIVE; 1836 } 1837 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1838 if (dep->de_flag & DE_ACCESS) { 1839 if (acc == NULL) 1840 acc = ts == NULL ? 1841 (getnanotime(&tsb), ts = &tsb) : ts; 1842 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1843 } 1844 if (dep->de_flag & DE_CREATE) { 1845 if (cre == NULL) 1846 cre = ts == NULL ? 1847 (getnanotime(&tsb), ts = &tsb) : ts; 1848 unix2dostime(cre, gmtoff, &dep->de_CDate, 1849 &dep->de_CTime, &dep->de_CHun); 1850 } 1851 } 1852 1853 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1854 } 1855 1856 /* Global vfs data structures for msdosfs */ 1857 int (**msdosfs_vnodeop_p)(void *); 1858 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1859 { &vop_default_desc, vn_default_error }, 1860 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1861 { &vop_create_desc, msdosfs_create }, /* create */ 1862 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 1863 { &vop_open_desc, genfs_nullop }, /* open */ 1864 { &vop_close_desc, msdosfs_close }, /* close */ 1865 { &vop_access_desc, msdosfs_access }, /* access */ 1866 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1867 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1868 { &vop_read_desc, msdosfs_read }, /* read */ 1869 { &vop_write_desc, msdosfs_write }, /* write */ 1870 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1871 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1872 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1873 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1874 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1875 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1876 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1877 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1878 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1879 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 1880 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1881 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1882 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1883 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 1884 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1885 { &vop_readlink_desc, genfs_einval }, /* readlink */ 1886 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1887 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1888 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1889 { &vop_lock_desc, genfs_lock }, /* lock */ 1890 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1891 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1892 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1893 { &vop_print_desc, msdosfs_print }, /* print */ 1894 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1895 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1896 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1897 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1898 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1899 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1900 { NULL, NULL } 1901 }; 1902 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1903 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1904