1 /* $NetBSD: msdosfs_vnops.c,v 1.77 2011/06/16 09:21:02 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 1.77 2011/06/16 09:21:02 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 ubc_zerorange(&vp->v_uobj, (off_t)dep->de_FileSize, 631 rem, UBC_UNMAP_FLAG(vp)); 632 extended = 1; 633 } 634 635 do { 636 oldoff = uio->uio_offset; 637 bytelen = uio->uio_resid; 638 639 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 640 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 641 if (error) 642 break; 643 644 /* 645 * flush what we just wrote if necessary. 646 * XXXUBC simplistic async flushing. 647 */ 648 649 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 650 mutex_enter(vp->v_interlock); 651 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 652 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 653 } 654 } while (error == 0 && uio->uio_resid > 0); 655 656 /* set final size */ 657 uvm_vnp_setsize(vp, dep->de_FileSize); 658 if (error == 0 && ioflag & IO_SYNC) { 659 mutex_enter(vp->v_interlock); 660 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 661 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 662 } 663 dep->de_flag |= DE_UPDATE; 664 665 /* 666 * If the write failed and they want us to, truncate the file back 667 * to the size it was before the write was attempted. 668 */ 669 errexit: 670 if (resid > uio->uio_resid) 671 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 672 if (error) { 673 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 674 uio->uio_offset -= resid - uio->uio_resid; 675 uio->uio_resid = resid; 676 } else if ((ioflag & IO_SYNC) == IO_SYNC) 677 error = deupdat(dep, 1); 678 fstrans_done(vp->v_mount); 679 KASSERT(vp->v_size == dep->de_FileSize); 680 return (error); 681 } 682 683 int 684 msdosfs_update(struct vnode *vp, const struct timespec *acc, 685 const struct timespec *mod, int flags) 686 { 687 struct buf *bp; 688 struct direntry *dirp; 689 struct denode *dep; 690 int error; 691 692 if (vp->v_mount->mnt_flag & MNT_RDONLY) 693 return (0); 694 dep = VTODE(vp); 695 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 696 if ((dep->de_flag & DE_MODIFIED) == 0) 697 return (0); 698 dep->de_flag &= ~DE_MODIFIED; 699 if (dep->de_Attributes & ATTR_DIRECTORY) 700 return (0); 701 if (dep->de_refcnt <= 0) 702 return (0); 703 error = readde(dep, &bp, &dirp); 704 if (error) 705 return (error); 706 DE_EXTERNALIZE(dirp, dep); 707 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 708 return (bwrite(bp)); 709 else { 710 bdwrite(bp); 711 return (0); 712 } 713 } 714 715 /* 716 * Flush the blocks of a file to disk. 717 * 718 * This function is worthless for vnodes that represent directories. Maybe we 719 * could just do a sync if they try an fsync on a directory file. 720 */ 721 int 722 msdosfs_remove(void *v) 723 { 724 struct vop_remove_args /* { 725 struct vnode *a_dvp; 726 struct vnode *a_vp; 727 struct componentname *a_cnp; 728 } */ *ap = v; 729 struct denode *dep = VTODE(ap->a_vp); 730 struct denode *ddep = VTODE(ap->a_dvp); 731 int error; 732 733 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 734 if (ap->a_vp->v_type == VDIR) 735 error = EPERM; 736 else 737 error = removede(ddep, dep); 738 #ifdef MSDOSFS_DEBUG 739 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 740 dep, ap->a_vp->v_usecount); 741 #endif 742 VN_KNOTE(ap->a_vp, NOTE_DELETE); 743 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 744 if (ddep == dep) 745 vrele(ap->a_vp); 746 else 747 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 748 * via vrele() */ 749 vput(ap->a_dvp); 750 fstrans_done(ap->a_dvp->v_mount); 751 return (error); 752 } 753 754 /* 755 * Renames on files require moving the denode to a new hash queue since the 756 * denode's location is used to compute which hash queue to put the file 757 * in. Unless it is a rename in place. For example "mv a b". 758 * 759 * What follows is the basic algorithm: 760 * 761 * if (file move) { 762 * if (dest file exists) { 763 * remove dest file 764 * } 765 * if (dest and src in same directory) { 766 * rewrite name in existing directory slot 767 * } else { 768 * write new entry in dest directory 769 * update offset and dirclust in denode 770 * move denode to new hash chain 771 * clear old directory entry 772 * } 773 * } else { 774 * directory move 775 * if (dest directory exists) { 776 * if (dest is not empty) { 777 * return ENOTEMPTY 778 * } 779 * remove dest directory 780 * } 781 * if (dest and src in same directory) { 782 * rewrite name in existing entry 783 * } else { 784 * be sure dest is not a child of src directory 785 * write entry in dest directory 786 * update "." and ".." in moved directory 787 * update offset and dirclust in denode 788 * move denode to new hash chain 789 * clear old directory entry for moved directory 790 * } 791 * } 792 * 793 * On entry: 794 * source's parent directory is unlocked 795 * source file or directory is unlocked 796 * destination's parent directory is locked 797 * destination file or directory is locked if it exists 798 * 799 * On exit: 800 * all denodes should be released 801 * 802 * Notes: 803 * I'm not sure how the memory containing the pathnames pointed at by the 804 * componentname structures is freed, there may be some memory bleeding 805 * for each rename done. 806 * 807 * --More-- Notes: 808 * This routine needs help. badly. 809 */ 810 int 811 msdosfs_rename(void *v) 812 { 813 struct vop_rename_args /* { 814 struct vnode *a_fdvp; 815 struct vnode *a_fvp; 816 struct componentname *a_fcnp; 817 struct vnode *a_tdvp; 818 struct vnode *a_tvp; 819 struct componentname *a_tcnp; 820 } */ *ap = v; 821 struct vnode *tvp = ap->a_tvp; 822 struct vnode *tdvp = ap->a_tdvp; 823 struct vnode *fvp = ap->a_fvp; 824 struct vnode *fdvp = ap->a_fdvp; 825 struct componentname *tcnp = ap->a_tcnp; 826 struct componentname *fcnp = ap->a_fcnp; 827 struct denode *ip, *xp, *dp, *zp; 828 u_char toname[12], oldname[12]; 829 u_long from_diroffset, to_diroffset; 830 u_char to_count; 831 int doingdirectory = 0, newparent = 0; 832 int error; 833 u_long cn; 834 daddr_t bn; 835 struct msdosfsmount *pmp; 836 struct direntry *dotdotp; 837 struct buf *bp; 838 839 pmp = VFSTOMSDOSFS(fdvp->v_mount); 840 841 /* 842 * Check for cross-device rename. 843 */ 844 if ((fvp->v_mount != tdvp->v_mount) || 845 (tvp && (fvp->v_mount != tvp->v_mount))) { 846 error = EXDEV; 847 abortit: 848 VOP_ABORTOP(tdvp, tcnp); 849 if (tdvp == tvp) 850 vrele(tdvp); 851 else 852 vput(tdvp); 853 if (tvp) 854 vput(tvp); 855 VOP_ABORTOP(fdvp, fcnp); 856 vrele(fdvp); 857 vrele(fvp); 858 return (error); 859 } 860 861 /* 862 * If source and dest are the same, do nothing. 863 */ 864 if (tvp == fvp) { 865 error = 0; 866 goto abortit; 867 } 868 869 /* 870 * XXX: This can deadlock since we hold tdvp/tvp locked. 871 * But I'm not going to fix it now. 872 */ 873 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 874 goto abortit; 875 dp = VTODE(fdvp); 876 ip = VTODE(fvp); 877 878 /* 879 * Be sure we are not renaming ".", "..", or an alias of ".". This 880 * leads to a crippled directory tree. It's pretty tough to do a 881 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 882 * doesn't work if the ".." entry is missing. 883 */ 884 if (ip->de_Attributes & ATTR_DIRECTORY) { 885 /* 886 * Avoid ".", "..", and aliases of "." for obvious reasons. 887 */ 888 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 889 dp == ip || 890 (fcnp->cn_flags & ISDOTDOT) || 891 (tcnp->cn_flags & ISDOTDOT) || 892 (ip->de_flag & DE_RENAME)) { 893 VOP_UNLOCK(fvp); 894 error = EINVAL; 895 goto abortit; 896 } 897 ip->de_flag |= DE_RENAME; 898 doingdirectory++; 899 } 900 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 901 902 fstrans_start(fdvp->v_mount, FSTRANS_SHARED); 903 /* 904 * When the target exists, both the directory 905 * and target vnodes are returned locked. 906 */ 907 dp = VTODE(tdvp); 908 xp = tvp ? VTODE(tvp) : NULL; 909 /* 910 * Remember direntry place to use for destination 911 */ 912 to_diroffset = dp->de_fndoffset; 913 to_count = dp->de_fndcnt; 914 915 /* 916 * If ".." must be changed (ie the directory gets a new 917 * parent) then the source directory must not be in the 918 * directory hierarchy above the target, as this would 919 * orphan everything below the source directory. Also 920 * the user must have write permission in the source so 921 * as to be able to change "..". We must repeat the call 922 * to namei, as the parent directory is unlocked by the 923 * call to doscheckpath(). 924 */ 925 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 926 VOP_UNLOCK(fvp); 927 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 928 newparent = 1; 929 930 if (doingdirectory && newparent) { 931 if (error) /* write access check above */ 932 goto tdvpbad; 933 if (xp != NULL) 934 vput(tvp); 935 tvp = NULL; 936 /* 937 * doscheckpath() vput()'s tdvp (dp == VTODE(tdvp)), 938 * so we have to get an extra ref to it first, and 939 * because it's been unlocked we need to do a relookup 940 * afterwards in case tvp has changed. 941 */ 942 vref(tdvp); 943 if ((error = doscheckpath(ip, dp)) != 0) 944 goto bad; 945 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 946 if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) { 947 VOP_UNLOCK(tdvp); 948 goto bad; 949 } 950 dp = VTODE(tdvp); 951 xp = tvp ? VTODE(tvp) : NULL; 952 } 953 954 if (xp != NULL) { 955 /* 956 * Target must be empty if a directory and have no links 957 * to it. Also, ensure source and target are compatible 958 * (both directories, or both not directories). 959 */ 960 if (xp->de_Attributes & ATTR_DIRECTORY) { 961 if (!dosdirempty(xp)) { 962 error = ENOTEMPTY; 963 goto tdvpbad; 964 } 965 if (!doingdirectory) { 966 error = ENOTDIR; 967 goto tdvpbad; 968 } 969 } else if (doingdirectory) { 970 error = EISDIR; 971 goto tdvpbad; 972 } 973 if ((error = removede(dp, xp)) != 0) 974 goto tdvpbad; 975 VN_KNOTE(tdvp, NOTE_WRITE); 976 VN_KNOTE(tvp, NOTE_DELETE); 977 cache_purge(tvp); 978 vput(tvp); 979 tvp = NULL; 980 xp = NULL; 981 } 982 983 /* 984 * Convert the filename in tcnp into a dos filename. We copy this 985 * into the denode and directory entry for the destination 986 * file/directory. 987 */ 988 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) { 989 fstrans_done(fdvp->v_mount); 990 goto abortit; 991 } 992 993 /* 994 * Since from wasn't locked at various places above, 995 * have to do a relookup here. 996 */ 997 fcnp->cn_flags &= ~MODMASK; 998 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 999 VOP_UNLOCK(tdvp); 1000 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1001 if ((error = relookup(fdvp, &fvp, fcnp, 0))) { 1002 VOP_UNLOCK(fdvp); 1003 vrele(ap->a_fvp); 1004 vrele(tdvp); 1005 fstrans_done(fdvp->v_mount); 1006 return (error); 1007 } 1008 if (fvp == NULL) { 1009 /* 1010 * From name has disappeared. 1011 */ 1012 if (doingdirectory) 1013 panic("rename: lost dir entry"); 1014 vput(fdvp); 1015 vrele(ap->a_fvp); 1016 vrele(tdvp); 1017 fstrans_done(fdvp->v_mount); 1018 return 0; 1019 } 1020 VOP_UNLOCK(fdvp); 1021 xp = VTODE(fvp); 1022 zp = VTODE(fdvp); 1023 from_diroffset = zp->de_fndoffset; 1024 1025 /* 1026 * Ensure that the directory entry still exists and has not 1027 * changed till now. If the source is a file the entry may 1028 * have been unlinked or renamed. In either case there is 1029 * no further work to be done. If the source is a directory 1030 * then it cannot have been rmdir'ed or renamed; this is 1031 * prohibited by the DE_RENAME flag. 1032 */ 1033 if (xp != ip) { 1034 if (doingdirectory) 1035 panic("rename: lost dir entry"); 1036 vrele(ap->a_fvp); 1037 xp = NULL; 1038 } else { 1039 vrele(fvp); 1040 xp = NULL; 1041 1042 /* 1043 * First write a new entry in the destination 1044 * directory and mark the entry in the source directory 1045 * as deleted. Then move the denode to the correct hash 1046 * chain for its new location in the filesystem. And, if 1047 * we moved a directory, then update its .. entry to point 1048 * to the new parent directory. 1049 */ 1050 memcpy(oldname, ip->de_Name, 11); 1051 memcpy(ip->de_Name, toname, 11); /* update denode */ 1052 dp->de_fndoffset = to_diroffset; 1053 dp->de_fndcnt = to_count; 1054 error = createde(ip, dp, (struct denode **)0, tcnp); 1055 if (error) { 1056 memcpy(ip->de_Name, oldname, 11); 1057 VOP_UNLOCK(fvp); 1058 goto bad; 1059 } 1060 ip->de_refcnt++; 1061 zp->de_fndoffset = from_diroffset; 1062 if ((error = removede(zp, ip)) != 0) { 1063 /* XXX should really panic here, fs is corrupt */ 1064 VOP_UNLOCK(fvp); 1065 goto bad; 1066 } 1067 cache_purge(fvp); 1068 if (!doingdirectory) { 1069 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1070 &ip->de_dirclust, 0); 1071 if (error) { 1072 /* XXX should really panic here, fs is corrupt */ 1073 VOP_UNLOCK(fvp); 1074 goto bad; 1075 } 1076 ip->de_diroffset = to_diroffset; 1077 if (ip->de_dirclust != MSDOSFSROOT) 1078 ip->de_diroffset &= pmp->pm_crbomask; 1079 } 1080 reinsert(ip); 1081 } 1082 1083 /* 1084 * If we moved a directory to a new parent directory, then we must 1085 * fixup the ".." entry in the moved directory. 1086 */ 1087 if (doingdirectory && newparent) { 1088 cn = ip->de_StartCluster; 1089 if (cn == MSDOSFSROOT) { 1090 /* this should never happen */ 1091 panic("msdosfs_rename: updating .. in root directory?"); 1092 } else 1093 bn = cntobn(pmp, cn); 1094 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1095 pmp->pm_bpcluster, NOCRED, B_MODIFY, &bp); 1096 if (error) { 1097 /* XXX should really panic here, fs is corrupt */ 1098 brelse(bp, 0); 1099 VOP_UNLOCK(fvp); 1100 goto bad; 1101 } 1102 dotdotp = (struct direntry *)bp->b_data + 1; 1103 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1104 if (FAT32(pmp)) { 1105 putushort(dotdotp->deHighClust, 1106 dp->de_StartCluster >> 16); 1107 } else { 1108 putushort(dotdotp->deHighClust, 0); 1109 } 1110 if ((error = bwrite(bp)) != 0) { 1111 /* XXX should really panic here, fs is corrupt */ 1112 VOP_UNLOCK(fvp); 1113 goto bad; 1114 } 1115 } 1116 1117 VN_KNOTE(fvp, NOTE_RENAME); 1118 VOP_UNLOCK(fvp); 1119 bad: 1120 if (tvp) 1121 vput(tvp); 1122 vrele(tdvp); 1123 ip->de_flag &= ~DE_RENAME; 1124 vrele(fdvp); 1125 vrele(fvp); 1126 fstrans_done(fdvp->v_mount); 1127 return (error); 1128 1129 /* XXX: uuuh */ 1130 tdvpbad: 1131 VOP_UNLOCK(tdvp); 1132 goto bad; 1133 } 1134 1135 static const struct { 1136 struct direntry dot; 1137 struct direntry dotdot; 1138 } dosdirtemplate = { 1139 { ". ", " ", /* the . entry */ 1140 ATTR_DIRECTORY, /* file attribute */ 1141 0, /* reserved */ 1142 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1143 { 0, 0 }, /* access date */ 1144 { 0, 0 }, /* high bits of start cluster */ 1145 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1146 { 0, 0 }, /* startcluster */ 1147 { 0, 0, 0, 0 } /* filesize */ 1148 }, 1149 { ".. ", " ", /* the .. entry */ 1150 ATTR_DIRECTORY, /* file attribute */ 1151 0, /* reserved */ 1152 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1153 { 0, 0 }, /* access date */ 1154 { 0, 0 }, /* high bits of start cluster */ 1155 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1156 { 0, 0 }, /* startcluster */ 1157 { 0, 0, 0, 0 } /* filesize */ 1158 } 1159 }; 1160 1161 int 1162 msdosfs_mkdir(void *v) 1163 { 1164 struct vop_mkdir_args /* { 1165 struct vnode *a_dvp; 1166 struvt vnode **a_vpp; 1167 struvt componentname *a_cnp; 1168 struct vattr *a_vap; 1169 } */ *ap = v; 1170 struct componentname *cnp = ap->a_cnp; 1171 struct denode ndirent; 1172 struct denode *dep; 1173 struct denode *pdep = VTODE(ap->a_dvp); 1174 int error; 1175 int bn; 1176 u_long newcluster, pcl; 1177 daddr_t lbn; 1178 struct direntry *denp; 1179 struct msdosfsmount *pmp = pdep->de_pmp; 1180 struct buf *bp; 1181 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1182 1183 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1184 /* 1185 * If this is the root directory and there is no space left we 1186 * can't do anything. This is because the root directory can not 1187 * change size. 1188 */ 1189 if (pdep->de_StartCluster == MSDOSFSROOT 1190 && pdep->de_fndoffset >= pdep->de_FileSize) { 1191 error = ENOSPC; 1192 goto bad2; 1193 } 1194 1195 /* 1196 * Allocate a cluster to hold the about to be created directory. 1197 */ 1198 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1199 if (error) 1200 goto bad2; 1201 1202 memset(&ndirent, 0, sizeof(ndirent)); 1203 ndirent.de_pmp = pmp; 1204 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1205 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1206 1207 /* 1208 * Now fill the cluster with the "." and ".." entries. And write 1209 * the cluster to disk. This way it is there for the parent 1210 * directory to be pointing at if there were a crash. 1211 */ 1212 bn = cntobn(pmp, newcluster); 1213 lbn = de_bn2kb(pmp, bn); 1214 /* always succeeds */ 1215 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1216 memset(bp->b_data, 0, pmp->pm_bpcluster); 1217 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1218 denp = (struct direntry *)bp->b_data; 1219 putushort(denp[0].deStartCluster, newcluster); 1220 putushort(denp[0].deCDate, ndirent.de_CDate); 1221 putushort(denp[0].deCTime, ndirent.de_CTime); 1222 denp[0].deCHundredth = ndirent.de_CHun; 1223 putushort(denp[0].deADate, ndirent.de_ADate); 1224 putushort(denp[0].deMDate, ndirent.de_MDate); 1225 putushort(denp[0].deMTime, ndirent.de_MTime); 1226 pcl = pdep->de_StartCluster; 1227 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1228 pcl = 0; 1229 putushort(denp[1].deStartCluster, pcl); 1230 putushort(denp[1].deCDate, ndirent.de_CDate); 1231 putushort(denp[1].deCTime, ndirent.de_CTime); 1232 denp[1].deCHundredth = ndirent.de_CHun; 1233 putushort(denp[1].deADate, ndirent.de_ADate); 1234 putushort(denp[1].deMDate, ndirent.de_MDate); 1235 putushort(denp[1].deMTime, ndirent.de_MTime); 1236 if (FAT32(pmp)) { 1237 putushort(denp[0].deHighClust, newcluster >> 16); 1238 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1239 } else { 1240 putushort(denp[0].deHighClust, 0); 1241 putushort(denp[1].deHighClust, 0); 1242 } 1243 1244 if (async) 1245 bdwrite(bp); 1246 else if ((error = bwrite(bp)) != 0) 1247 goto bad; 1248 1249 /* 1250 * Now build up a directory entry pointing to the newly allocated 1251 * cluster. This will be written to an empty slot in the parent 1252 * directory. 1253 */ 1254 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1255 goto bad; 1256 1257 ndirent.de_Attributes = ATTR_DIRECTORY; 1258 ndirent.de_StartCluster = newcluster; 1259 ndirent.de_FileSize = 0; 1260 ndirent.de_dev = pdep->de_dev; 1261 ndirent.de_devvp = pdep->de_devvp; 1262 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1263 goto bad; 1264 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1265 vput(ap->a_dvp); 1266 *ap->a_vpp = DETOV(dep); 1267 fstrans_done(ap->a_dvp->v_mount); 1268 return (0); 1269 1270 bad: 1271 clusterfree(pmp, newcluster, NULL); 1272 bad2: 1273 vput(ap->a_dvp); 1274 fstrans_done(ap->a_dvp->v_mount); 1275 return (error); 1276 } 1277 1278 int 1279 msdosfs_rmdir(void *v) 1280 { 1281 struct vop_rmdir_args /* { 1282 struct vnode *a_dvp; 1283 struct vnode *a_vp; 1284 struct componentname *a_cnp; 1285 } */ *ap = v; 1286 struct vnode *vp = ap->a_vp; 1287 struct vnode *dvp = ap->a_dvp; 1288 struct componentname *cnp = ap->a_cnp; 1289 struct denode *ip, *dp; 1290 int error; 1291 1292 ip = VTODE(vp); 1293 dp = VTODE(dvp); 1294 /* 1295 * No rmdir "." please. 1296 */ 1297 if (dp == ip) { 1298 vrele(dvp); 1299 vput(vp); 1300 return (EINVAL); 1301 } 1302 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1303 /* 1304 * Verify the directory is empty (and valid). 1305 * (Rmdir ".." won't be valid since 1306 * ".." will contain a reference to 1307 * the current directory and thus be 1308 * non-empty.) 1309 */ 1310 error = 0; 1311 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1312 error = ENOTEMPTY; 1313 goto out; 1314 } 1315 /* 1316 * Delete the entry from the directory. For dos filesystems this 1317 * gets rid of the directory entry on disk, the in memory copy 1318 * still exists but the de_refcnt is <= 0. This prevents it from 1319 * being found by deget(). When the vput() on dep is done we give 1320 * up access and eventually msdosfs_reclaim() will be called which 1321 * will remove it from the denode cache. 1322 */ 1323 if ((error = removede(dp, ip)) != 0) 1324 goto out; 1325 /* 1326 * This is where we decrement the link count in the parent 1327 * directory. Since dos filesystems don't do this we just purge 1328 * the name cache and let go of the parent directory denode. 1329 */ 1330 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1331 cache_purge(dvp); 1332 vput(dvp); 1333 dvp = NULL; 1334 /* 1335 * Truncate the directory that is being deleted. 1336 */ 1337 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1338 cache_purge(vp); 1339 out: 1340 VN_KNOTE(vp, NOTE_DELETE); 1341 if (dvp) 1342 vput(dvp); 1343 vput(vp); 1344 fstrans_done(ap->a_dvp->v_mount); 1345 return (error); 1346 } 1347 1348 int 1349 msdosfs_readdir(void *v) 1350 { 1351 struct vop_readdir_args /* { 1352 struct vnode *a_vp; 1353 struct uio *a_uio; 1354 kauth_cred_t a_cred; 1355 int *a_eofflag; 1356 off_t **a_cookies; 1357 int *a_ncookies; 1358 } */ *ap = v; 1359 int error = 0; 1360 int diff; 1361 long n; 1362 int blsize; 1363 long on; 1364 long lost; 1365 long count; 1366 u_long cn; 1367 ino_t fileno; 1368 u_long dirsperblk; 1369 long bias = 0; 1370 daddr_t bn, lbn; 1371 struct buf *bp; 1372 struct denode *dep = VTODE(ap->a_vp); 1373 struct msdosfsmount *pmp = dep->de_pmp; 1374 struct direntry *dentp; 1375 struct dirent *dirbuf; 1376 struct uio *uio = ap->a_uio; 1377 off_t *cookies = NULL; 1378 int ncookies = 0, nc = 0; 1379 off_t offset, uio_off; 1380 int chksum = -1; 1381 1382 #ifdef MSDOSFS_DEBUG 1383 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1384 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1385 #endif 1386 1387 /* 1388 * msdosfs_readdir() won't operate properly on regular files since 1389 * it does i/o only with the filesystem vnode, and hence can 1390 * retrieve the wrong block from the buffer cache for a plain file. 1391 * So, fail attempts to readdir() on a plain file. 1392 */ 1393 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1394 return (ENOTDIR); 1395 1396 /* 1397 * If the user buffer is smaller than the size of one dos directory 1398 * entry or the file offset is not a multiple of the size of a 1399 * directory entry, then we fail the read. 1400 */ 1401 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1402 offset = uio->uio_offset; 1403 if (count < sizeof(struct direntry) || 1404 (offset & (sizeof(struct direntry) - 1))) 1405 return (EINVAL); 1406 lost = uio->uio_resid - count; 1407 uio->uio_resid = count; 1408 uio_off = uio->uio_offset; 1409 1410 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 1411 1412 /* Allocate a temporary dirent buffer. */ 1413 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1414 1415 if (ap->a_ncookies) { 1416 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1417 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1418 *ap->a_cookies = cookies; 1419 } 1420 1421 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1422 1423 /* 1424 * If they are reading from the root directory then, we simulate 1425 * the . and .. entries since these don't exist in the root 1426 * directory. We also set the offset bias to make up for having to 1427 * simulate these entries. By this I mean that at file offset 64 we 1428 * read the first entry in the root directory that lives on disk. 1429 */ 1430 if (dep->de_StartCluster == MSDOSFSROOT 1431 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1432 #if 0 1433 printf("msdosfs_readdir(): going after . or .. in root dir, " 1434 "offset %" PRIu64 "\n", offset); 1435 #endif 1436 bias = 2 * sizeof(struct direntry); 1437 if (offset < bias) { 1438 for (n = (int)offset / sizeof(struct direntry); 1439 n < 2; n++) { 1440 if (FAT32(pmp)) 1441 dirbuf->d_fileno = cntobn(pmp, 1442 (ino_t)pmp->pm_rootdirblk) 1443 * dirsperblk; 1444 else 1445 dirbuf->d_fileno = 1; 1446 dirbuf->d_type = DT_DIR; 1447 switch (n) { 1448 case 0: 1449 dirbuf->d_namlen = 1; 1450 strlcpy(dirbuf->d_name, ".", 1451 sizeof(dirbuf->d_name)); 1452 break; 1453 case 1: 1454 dirbuf->d_namlen = 2; 1455 strlcpy(dirbuf->d_name, "..", 1456 sizeof(dirbuf->d_name)); 1457 break; 1458 } 1459 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1460 if (uio->uio_resid < dirbuf->d_reclen) 1461 goto out; 1462 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1463 if (error) 1464 goto out; 1465 offset += sizeof(struct direntry); 1466 uio_off = offset; 1467 if (cookies) { 1468 *cookies++ = offset; 1469 ncookies++; 1470 if (ncookies >= nc) 1471 goto out; 1472 } 1473 } 1474 } 1475 } 1476 1477 while (uio->uio_resid > 0) { 1478 lbn = de_cluster(pmp, offset - bias); 1479 on = (offset - bias) & pmp->pm_crbomask; 1480 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1481 diff = dep->de_FileSize - (offset - bias); 1482 if (diff <= 0) 1483 break; 1484 n = MIN(n, diff); 1485 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1486 break; 1487 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1488 NOCRED, 0, &bp); 1489 if (error) { 1490 brelse(bp, 0); 1491 goto bad; 1492 } 1493 n = MIN(n, blsize - bp->b_resid); 1494 1495 /* 1496 * Convert from dos directory entries to fs-independent 1497 * directory entries. 1498 */ 1499 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1500 (char *)dentp < (char *)bp->b_data + on + n; 1501 dentp++, offset += sizeof(struct direntry)) { 1502 #if 0 1503 1504 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1505 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1506 #endif 1507 /* 1508 * If this is an unused entry, we can stop. 1509 */ 1510 if (dentp->deName[0] == SLOT_EMPTY) { 1511 brelse(bp, 0); 1512 goto out; 1513 } 1514 /* 1515 * Skip deleted entries. 1516 */ 1517 if (dentp->deName[0] == SLOT_DELETED) { 1518 chksum = -1; 1519 continue; 1520 } 1521 1522 /* 1523 * Handle Win95 long directory entries 1524 */ 1525 if (dentp->deAttributes == ATTR_WIN95) { 1526 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1527 continue; 1528 chksum = win2unixfn((struct winentry *)dentp, 1529 dirbuf, chksum); 1530 continue; 1531 } 1532 1533 /* 1534 * Skip volume labels 1535 */ 1536 if (dentp->deAttributes & ATTR_VOLUME) { 1537 chksum = -1; 1538 continue; 1539 } 1540 /* 1541 * This computation of d_fileno must match 1542 * the computation of va_fileid in 1543 * msdosfs_getattr. 1544 */ 1545 if (dentp->deAttributes & ATTR_DIRECTORY) { 1546 fileno = getushort(dentp->deStartCluster); 1547 if (FAT32(pmp)) 1548 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1549 /* if this is the root directory */ 1550 if (fileno == MSDOSFSROOT) 1551 if (FAT32(pmp)) 1552 fileno = cntobn(pmp, 1553 (ino_t)pmp->pm_rootdirblk) 1554 * dirsperblk; 1555 else 1556 fileno = 1; 1557 else 1558 fileno = cntobn(pmp, fileno) * dirsperblk; 1559 dirbuf->d_fileno = fileno; 1560 dirbuf->d_type = DT_DIR; 1561 } else { 1562 dirbuf->d_fileno = 1563 offset / sizeof(struct direntry); 1564 dirbuf->d_type = DT_REG; 1565 } 1566 if (chksum != winChksum(dentp->deName)) 1567 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1568 (u_char *)dirbuf->d_name, 1569 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1570 else 1571 dirbuf->d_name[dirbuf->d_namlen] = 0; 1572 chksum = -1; 1573 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1574 if (uio->uio_resid < dirbuf->d_reclen) { 1575 brelse(bp, 0); 1576 goto out; 1577 } 1578 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1579 if (error) { 1580 brelse(bp, 0); 1581 goto out; 1582 } 1583 uio_off = offset + sizeof(struct direntry); 1584 if (cookies) { 1585 *cookies++ = offset + sizeof(struct direntry); 1586 ncookies++; 1587 if (ncookies >= nc) { 1588 brelse(bp, 0); 1589 goto out; 1590 } 1591 } 1592 } 1593 brelse(bp, 0); 1594 } 1595 1596 out: 1597 uio->uio_offset = uio_off; 1598 uio->uio_resid += lost; 1599 if (dep->de_FileSize - (offset - bias) <= 0) 1600 *ap->a_eofflag = 1; 1601 else 1602 *ap->a_eofflag = 0; 1603 1604 if (ap->a_ncookies) { 1605 if (error) { 1606 free(*ap->a_cookies, M_TEMP); 1607 *ap->a_ncookies = 0; 1608 *ap->a_cookies = NULL; 1609 } else 1610 *ap->a_ncookies = ncookies; 1611 } 1612 1613 bad: 1614 free(dirbuf, M_MSDOSFSTMP); 1615 fstrans_done(ap->a_vp->v_mount); 1616 return (error); 1617 } 1618 1619 /* 1620 * vp - address of vnode file the file 1621 * bn - which cluster we are interested in mapping to a filesystem block number. 1622 * vpp - returns the vnode for the block special file holding the filesystem 1623 * containing the file of interest 1624 * bnp - address of where to return the filesystem relative block number 1625 */ 1626 int 1627 msdosfs_bmap(void *v) 1628 { 1629 struct vop_bmap_args /* { 1630 struct vnode *a_vp; 1631 daddr_t a_bn; 1632 struct vnode **a_vpp; 1633 daddr_t *a_bnp; 1634 int *a_runp; 1635 } */ *ap = v; 1636 struct denode *dep = VTODE(ap->a_vp); 1637 int run, maxrun; 1638 daddr_t runbn; 1639 int status; 1640 1641 if (ap->a_vpp != NULL) 1642 *ap->a_vpp = dep->de_devvp; 1643 if (ap->a_bnp == NULL) 1644 return (0); 1645 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1646 1647 /* 1648 * From FreeBSD: 1649 * A little kludgy, but we loop calling pcbmap until we 1650 * reach the end of the contiguous piece, or reach MAXPHYS. 1651 * Since it reduces disk I/Os, the "wasted" CPU is put to 1652 * good use (4 to 5 fold sequential read I/O improvement on USB 1653 * drives). 1654 */ 1655 if (ap->a_runp != NULL) { 1656 /* taken from ufs_bmap */ 1657 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1658 dep->de_pmp->pm_maxcluster - ap->a_bn); 1659 for (run = 1; run <= maxrun; run++) { 1660 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1661 != 0 || runbn != 1662 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1663 break; 1664 } 1665 *ap->a_runp = run - 1; 1666 } 1667 1668 /* 1669 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1670 */ 1671 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1672 return status; 1673 } 1674 1675 int 1676 msdosfs_strategy(void *v) 1677 { 1678 struct vop_strategy_args /* { 1679 struct vnode *a_vp; 1680 struct buf *a_bp; 1681 } */ *ap = v; 1682 struct vnode *vp = ap->a_vp; 1683 struct buf *bp = ap->a_bp; 1684 struct denode *dep = VTODE(bp->b_vp); 1685 int error = 0; 1686 1687 if (vp->v_type == VBLK || vp->v_type == VCHR) 1688 panic("msdosfs_strategy: spec"); 1689 /* 1690 * If we don't already know the filesystem relative block number 1691 * then get it using pcbmap(). If pcbmap() returns the block 1692 * number as -1 then we've got a hole in the file. DOS filesystems 1693 * don't allow files with holes, so we shouldn't ever see this. 1694 */ 1695 if (bp->b_blkno == bp->b_lblkno) { 1696 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1697 &bp->b_blkno, 0, 0); 1698 if (error) 1699 bp->b_blkno = -1; 1700 if (bp->b_blkno == -1) 1701 clrbuf(bp); 1702 else 1703 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1704 } 1705 if (bp->b_blkno == -1) { 1706 biodone(bp); 1707 return (error); 1708 } 1709 1710 /* 1711 * Read/write the block from/to the disk that contains the desired 1712 * file block. 1713 */ 1714 1715 vp = dep->de_devvp; 1716 return (VOP_STRATEGY(vp, bp)); 1717 } 1718 1719 int 1720 msdosfs_print(void *v) 1721 { 1722 struct vop_print_args /* { 1723 struct vnode *vp; 1724 } */ *ap = v; 1725 struct denode *dep = VTODE(ap->a_vp); 1726 1727 printf( 1728 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1729 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1730 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1731 (unsigned long long)minor(dep->de_dev)); 1732 printf("\n"); 1733 return (0); 1734 } 1735 1736 int 1737 msdosfs_advlock(void *v) 1738 { 1739 struct vop_advlock_args /* { 1740 struct vnode *a_vp; 1741 void *a_id; 1742 int a_op; 1743 struct flock *a_fl; 1744 int a_flags; 1745 } */ *ap = v; 1746 struct denode *dep = VTODE(ap->a_vp); 1747 1748 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1749 } 1750 1751 int 1752 msdosfs_pathconf(void *v) 1753 { 1754 struct vop_pathconf_args /* { 1755 struct vnode *a_vp; 1756 int a_name; 1757 register_t *a_retval; 1758 } */ *ap = v; 1759 1760 switch (ap->a_name) { 1761 case _PC_LINK_MAX: 1762 *ap->a_retval = 1; 1763 return (0); 1764 case _PC_NAME_MAX: 1765 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1766 return (0); 1767 case _PC_PATH_MAX: 1768 *ap->a_retval = PATH_MAX; 1769 return (0); 1770 case _PC_CHOWN_RESTRICTED: 1771 *ap->a_retval = 1; 1772 return (0); 1773 case _PC_NO_TRUNC: 1774 *ap->a_retval = 0; 1775 return (0); 1776 case _PC_SYNC_IO: 1777 *ap->a_retval = 1; 1778 return (0); 1779 case _PC_FILESIZEBITS: 1780 *ap->a_retval = 32; 1781 return (0); 1782 default: 1783 return (EINVAL); 1784 } 1785 /* NOTREACHED */ 1786 } 1787 1788 int 1789 msdosfs_fsync(void *v) 1790 { 1791 struct vop_fsync_args /* { 1792 struct vnode *a_vp; 1793 kauth_cred_t a_cred; 1794 int a_flags; 1795 off_t offlo; 1796 off_t offhi; 1797 } */ *ap = v; 1798 struct vnode *vp = ap->a_vp; 1799 int wait; 1800 int error; 1801 1802 fstrans_start(vp->v_mount, FSTRANS_LAZY); 1803 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1804 error = vflushbuf(vp, wait); 1805 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 1806 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1807 1808 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1809 struct denode *dep = VTODE(vp); 1810 struct vnode *devvp = dep->de_devvp; 1811 1812 int l = 0; 1813 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1814 curlwp->l_cred); 1815 } 1816 fstrans_done(vp->v_mount); 1817 1818 return (error); 1819 } 1820 1821 void 1822 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1823 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1824 { 1825 struct timespec *ts = NULL, tsb; 1826 1827 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1828 /* XXX just call getnanotime early and use result if needed? */ 1829 dep->de_flag |= DE_MODIFIED; 1830 if (dep->de_flag & DE_UPDATE) { 1831 if (mod == NULL) { 1832 getnanotime(&tsb); 1833 mod = ts = &tsb; 1834 } 1835 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1836 dep->de_Attributes |= ATTR_ARCHIVE; 1837 } 1838 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1839 if (dep->de_flag & DE_ACCESS) { 1840 if (acc == NULL) 1841 acc = ts == NULL ? 1842 (getnanotime(&tsb), ts = &tsb) : ts; 1843 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1844 } 1845 if (dep->de_flag & DE_CREATE) { 1846 if (cre == NULL) 1847 cre = ts == NULL ? 1848 (getnanotime(&tsb), ts = &tsb) : ts; 1849 unix2dostime(cre, gmtoff, &dep->de_CDate, 1850 &dep->de_CTime, &dep->de_CHun); 1851 } 1852 } 1853 1854 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1855 } 1856 1857 /* Global vfs data structures for msdosfs */ 1858 int (**msdosfs_vnodeop_p)(void *); 1859 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1860 { &vop_default_desc, vn_default_error }, 1861 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1862 { &vop_create_desc, msdosfs_create }, /* create */ 1863 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 1864 { &vop_open_desc, genfs_nullop }, /* open */ 1865 { &vop_close_desc, msdosfs_close }, /* close */ 1866 { &vop_access_desc, msdosfs_access }, /* access */ 1867 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1868 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1869 { &vop_read_desc, msdosfs_read }, /* read */ 1870 { &vop_write_desc, msdosfs_write }, /* write */ 1871 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1872 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1873 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1874 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1875 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1876 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1877 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1878 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1879 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1880 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 1881 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1882 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1883 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1884 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 1885 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1886 { &vop_readlink_desc, genfs_einval }, /* readlink */ 1887 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1888 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1889 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1890 { &vop_lock_desc, genfs_lock }, /* lock */ 1891 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1892 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1893 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1894 { &vop_print_desc, msdosfs_print }, /* print */ 1895 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1896 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1897 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1898 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1899 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1900 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1901 { NULL, NULL } 1902 }; 1903 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1904 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1905