1 /* $NetBSD: msdosfs_vnops.c,v 1.42 2007/10/08 18:04:04 ad 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 1.42 2007/10/08 18:04:04 ad 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/vnode.h> 64 #include <sys/signalvar.h> 65 #include <sys/malloc.h> 66 #include <sys/dirent.h> 67 #include <sys/lockf.h> 68 #include <sys/kauth.h> 69 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 72 73 #include <uvm/uvm_extern.h> 74 75 #include <fs/msdosfs/bpb.h> 76 #include <fs/msdosfs/direntry.h> 77 #include <fs/msdosfs/denode.h> 78 #include <fs/msdosfs/msdosfsmount.h> 79 #include <fs/msdosfs/fat.h> 80 81 /* 82 * Some general notes: 83 * 84 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 85 * read/written using the vnode for the filesystem. Blocks that represent 86 * the contents of a file are read/written using the vnode for the file 87 * (including directories when they are read/written as files). This 88 * presents problems for the dos filesystem because data that should be in 89 * an inode (if dos had them) resides in the directory itself. Since we 90 * must update directory entries without the benefit of having the vnode 91 * for the directory we must use the vnode for the filesystem. This means 92 * that when a directory is actually read/written (via read, write, or 93 * readdir, or seek) we must use the vnode for the filesystem instead of 94 * the vnode for the directory as would happen in ufs. This is to insure we 95 * retrieve the correct block from the buffer cache since the hash value is 96 * based upon the vnode address and the desired block number. 97 */ 98 99 /* 100 * Create a regular file. On entry the directory to contain the file being 101 * created is locked. We must release before we return. We must also free 102 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 103 * only if the SAVESTART bit in cn_flags is clear on success. 104 */ 105 int 106 msdosfs_create(v) 107 void *v; 108 { 109 struct vop_create_args /* { 110 struct vnode *a_dvp; 111 struct vnode **a_vpp; 112 struct componentname *a_cnp; 113 struct vattr *a_vap; 114 } */ *ap = v; 115 struct componentname *cnp = ap->a_cnp; 116 struct denode ndirent; 117 struct denode *dep; 118 struct denode *pdep = VTODE(ap->a_dvp); 119 int error; 120 121 #ifdef MSDOSFS_DEBUG 122 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 123 #endif 124 125 /* 126 * If this is the root directory and there is no space left we 127 * can't do anything. This is because the root directory can not 128 * change size. 129 */ 130 if (pdep->de_StartCluster == MSDOSFSROOT 131 && pdep->de_fndoffset >= pdep->de_FileSize) { 132 error = ENOSPC; 133 goto bad; 134 } 135 136 /* 137 * Create a directory entry for the file, then call createde() to 138 * have it installed. NOTE: DOS files are always executable. We 139 * use the absence of the owner write bit to make the file 140 * readonly. 141 */ 142 #ifdef DIAGNOSTIC 143 if ((cnp->cn_flags & HASBUF) == 0) 144 panic("msdosfs_create: no name"); 145 #endif 146 memset(&ndirent, 0, sizeof(ndirent)); 147 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 148 goto bad; 149 150 ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ? 151 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 152 ndirent.de_StartCluster = 0; 153 ndirent.de_FileSize = 0; 154 ndirent.de_dev = pdep->de_dev; 155 ndirent.de_devvp = pdep->de_devvp; 156 ndirent.de_pmp = pdep->de_pmp; 157 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 158 DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff); 159 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 160 goto bad; 161 if ((cnp->cn_flags & SAVESTART) == 0) 162 PNBUF_PUT(cnp->cn_pnbuf); 163 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 164 vput(ap->a_dvp); 165 *ap->a_vpp = DETOV(dep); 166 return (0); 167 168 bad: 169 PNBUF_PUT(cnp->cn_pnbuf); 170 vput(ap->a_dvp); 171 return (error); 172 } 173 174 int 175 msdosfs_mknod(v) 176 void *v; 177 { 178 struct vop_mknod_args /* { 179 struct vnode *a_dvp; 180 struct vnode **a_vpp; 181 struct componentname *a_cnp; 182 struct vattr *a_vap; 183 } */ *ap = v; 184 185 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 186 vput(ap->a_dvp); 187 return (EINVAL); 188 } 189 190 int 191 msdosfs_open(void *v) 192 { 193 #if 0 194 struct vop_open_args /* { 195 struct vnode *a_vp; 196 int a_mode; 197 kauth_cred_t a_cred; 198 struct lwp *a_l; 199 } */ *ap; 200 #endif 201 202 return (0); 203 } 204 205 int 206 msdosfs_close(v) 207 void *v; 208 { 209 struct vop_close_args /* { 210 struct vnode *a_vp; 211 int a_fflag; 212 kauth_cred_t a_cred; 213 struct lwp *a_l; 214 } */ *ap = v; 215 struct vnode *vp = ap->a_vp; 216 struct denode *dep = VTODE(vp); 217 218 simple_lock(&vp->v_interlock); 219 if (vp->v_usecount > 1) 220 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 221 simple_unlock(&vp->v_interlock); 222 return (0); 223 } 224 225 int 226 msdosfs_access(v) 227 void *v; 228 { 229 struct vop_access_args /* { 230 struct vnode *a_vp; 231 int a_mode; 232 kauth_cred_t a_cred; 233 struct lwp *a_l; 234 } */ *ap = v; 235 struct vnode *vp = ap->a_vp; 236 struct denode *dep = VTODE(vp); 237 struct msdosfsmount *pmp = dep->de_pmp; 238 mode_t mode = ap->a_mode; 239 240 /* 241 * Disallow write attempts on read-only file systems; 242 * unless the file is a socket, fifo, or a block or 243 * character device resident on the file system. 244 */ 245 if (mode & VWRITE) { 246 switch (vp->v_type) { 247 case VDIR: 248 case VLNK: 249 case VREG: 250 if (vp->v_mount->mnt_flag & MNT_RDONLY) 251 return (EROFS); 252 default: 253 break; 254 } 255 } 256 257 if ((dep->de_Attributes & ATTR_READONLY) == 0) 258 mode = S_IRWXU|S_IRWXG|S_IRWXO; 259 else 260 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 261 return (vaccess(ap->a_vp->v_type, 262 mode & (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask), 263 pmp->pm_uid, pmp->pm_gid, ap->a_mode, ap->a_cred)); 264 } 265 266 int 267 msdosfs_getattr(v) 268 void *v; 269 { 270 struct vop_getattr_args /* { 271 struct vnode *a_vp; 272 struct vattr *a_vap; 273 kauth_cred_t a_cred; 274 struct lwp *a_l; 275 } */ *ap = v; 276 struct denode *dep = VTODE(ap->a_vp); 277 struct msdosfsmount *pmp = dep->de_pmp; 278 struct vattr *vap = ap->a_vap; 279 mode_t mode; 280 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 281 ino_t fileid; 282 283 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 284 vap->va_fsid = dep->de_dev; 285 /* 286 * The following computation of the fileid must be the same as that 287 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 288 * doesn't work. 289 */ 290 if (dep->de_Attributes & ATTR_DIRECTORY) { 291 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 292 if (dep->de_StartCluster == MSDOSFSROOT) 293 fileid = 1; 294 } else { 295 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 296 if (dep->de_dirclust == MSDOSFSROOT) 297 fileid = roottobn(pmp, 0) * dirsperblk; 298 fileid += dep->de_diroffset / sizeof(struct direntry); 299 } 300 vap->va_fileid = fileid; 301 if ((dep->de_Attributes & ATTR_READONLY) == 0) 302 mode = S_IRWXU|S_IRWXG|S_IRWXO; 303 else 304 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 305 vap->va_mode = 306 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 307 vap->va_uid = pmp->pm_uid; 308 vap->va_gid = pmp->pm_gid; 309 vap->va_nlink = 1; 310 vap->va_rdev = 0; 311 vap->va_size = ap->a_vp->v_size; 312 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 313 &vap->va_mtime); 314 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 315 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 316 &vap->va_atime); 317 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 318 pmp->pm_gmtoff, &vap->va_ctime); 319 } else { 320 vap->va_atime = vap->va_mtime; 321 vap->va_ctime = vap->va_mtime; 322 } 323 vap->va_flags = 0; 324 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 325 vap->va_mode |= S_ARCH1; 326 vap->va_gen = 0; 327 vap->va_blocksize = pmp->pm_bpcluster; 328 vap->va_bytes = 329 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 330 vap->va_type = ap->a_vp->v_type; 331 return (0); 332 } 333 334 int 335 msdosfs_setattr(v) 336 void *v; 337 { 338 struct vop_setattr_args /* { 339 struct vnode *a_vp; 340 struct vattr *a_vap; 341 kauth_cred_t a_cred; 342 struct lwp *a_l; 343 } */ *ap = v; 344 int error = 0, de_changed = 0; 345 struct denode *dep = VTODE(ap->a_vp); 346 struct msdosfsmount *pmp = dep->de_pmp; 347 struct vnode *vp = ap->a_vp; 348 struct vattr *vap = ap->a_vap; 349 kauth_cred_t cred = ap->a_cred; 350 351 #ifdef MSDOSFS_DEBUG 352 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 353 ap->a_vp, vap, cred, ap->a_l); 354 #endif 355 /* 356 * Note we silently ignore uid or gid changes. 357 */ 358 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 359 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 360 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 361 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 362 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 363 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 364 #ifdef MSDOSFS_DEBUG 365 printf("msdosfs_setattr(): returning EINVAL\n"); 366 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %llx\n", 367 vap->va_type, vap->va_nlink, vap->va_fsid, 368 (unsigned long long)vap->va_fileid); 369 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 370 vap->va_blocksize, vap->va_rdev, (long long)vap->va_bytes, vap->va_gen); 371 #endif 372 return (EINVAL); 373 } 374 /* 375 * Silently ignore attributes modifications on directories. 376 */ 377 if (ap->a_vp->v_type == VDIR) 378 return 0; 379 380 if (vap->va_size != VNOVAL) { 381 if (vp->v_mount->mnt_flag & MNT_RDONLY) 382 return (EROFS); 383 error = detrunc(dep, (u_long)vap->va_size, 0, cred, ap->a_l); 384 if (error) 385 return (error); 386 de_changed = 1; 387 } 388 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 389 if (vp->v_mount->mnt_flag & MNT_RDONLY) 390 return (EROFS); 391 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 392 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 393 NULL)) && 394 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 395 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_l)))) 396 return (error); 397 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 398 vap->va_atime.tv_sec != VNOVAL) 399 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 400 if (vap->va_mtime.tv_sec != VNOVAL) 401 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 402 dep->de_Attributes |= ATTR_ARCHIVE; 403 dep->de_flag |= DE_MODIFIED; 404 de_changed = 1; 405 } 406 /* 407 * DOS files only have the ability to have their writability 408 * attribute set, so we use the owner write bit to set the readonly 409 * attribute. 410 */ 411 if (vap->va_mode != (mode_t)VNOVAL) { 412 if (vp->v_mount->mnt_flag & MNT_RDONLY) 413 return (EROFS); 414 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 415 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 416 NULL))) 417 return (error); 418 /* We ignore the read and execute bits. */ 419 if (vap->va_mode & S_IWUSR) 420 dep->de_Attributes &= ~ATTR_READONLY; 421 else 422 dep->de_Attributes |= ATTR_READONLY; 423 dep->de_flag |= DE_MODIFIED; 424 de_changed = 1; 425 } 426 /* 427 * Allow the `archived' bit to be toggled. 428 */ 429 if (vap->va_flags != VNOVAL) { 430 if (vp->v_mount->mnt_flag & MNT_RDONLY) 431 return (EROFS); 432 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 433 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 434 NULL))) 435 return (error); 436 if (vap->va_flags & SF_ARCHIVED) 437 dep->de_Attributes &= ~ATTR_ARCHIVE; 438 else 439 dep->de_Attributes |= ATTR_ARCHIVE; 440 dep->de_flag |= DE_MODIFIED; 441 de_changed = 1; 442 } 443 444 if (de_changed) { 445 VN_KNOTE(vp, NOTE_ATTRIB); 446 return (deupdat(dep, 1)); 447 } else 448 return (0); 449 } 450 451 int 452 msdosfs_read(v) 453 void *v; 454 { 455 struct vop_read_args /* { 456 struct vnode *a_vp; 457 struct uio *a_uio; 458 int a_ioflag; 459 kauth_cred_t a_cred; 460 } */ *ap = v; 461 int error = 0, flags; 462 int64_t diff; 463 int blsize; 464 long n; 465 long on; 466 daddr_t lbn; 467 void *win; 468 vsize_t bytelen; 469 struct buf *bp; 470 struct vnode *vp = ap->a_vp; 471 struct denode *dep = VTODE(vp); 472 struct msdosfsmount *pmp = dep->de_pmp; 473 struct uio *uio = ap->a_uio; 474 475 /* 476 * If they didn't ask for any data, then we are done. 477 */ 478 479 if (uio->uio_resid == 0) 480 return (0); 481 if (uio->uio_offset < 0) 482 return (EINVAL); 483 if (uio->uio_offset >= dep->de_FileSize) 484 return (0); 485 486 if (vp->v_type == VREG) { 487 const int advice = IO_ADV_DECODE(ap->a_ioflag); 488 489 while (uio->uio_resid > 0) { 490 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 491 uio->uio_resid); 492 493 if (bytelen == 0) 494 break; 495 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 496 &bytelen, advice, UBC_READ); 497 error = uiomove(win, bytelen, uio); 498 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 499 ubc_release(win, flags); 500 if (error) 501 break; 502 } 503 dep->de_flag |= DE_ACCESS; 504 goto out; 505 } 506 507 /* this loop is only for directories now */ 508 do { 509 lbn = de_cluster(pmp, uio->uio_offset); 510 on = uio->uio_offset & pmp->pm_crbomask; 511 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 512 if (uio->uio_offset >= dep->de_FileSize) 513 return (0); 514 /* file size (and hence diff) may be up to 4GB */ 515 diff = dep->de_FileSize - uio->uio_offset; 516 if (diff < n) 517 n = (long) diff; 518 519 /* convert cluster # to sector # */ 520 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 521 if (error) 522 return (error); 523 524 /* 525 * If we are operating on a directory file then be sure to 526 * do i/o with the vnode for the filesystem instead of the 527 * vnode for the directory. 528 */ 529 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 530 NOCRED, &bp); 531 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 532 if (error) { 533 brelse(bp, 0); 534 return (error); 535 } 536 error = uiomove((char *)bp->b_data + on, (int) n, uio); 537 brelse(bp, 0); 538 } while (error == 0 && uio->uio_resid > 0 && n != 0); 539 540 out: 541 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 542 error = deupdat(dep, 1); 543 return (error); 544 } 545 546 /* 547 * Write data to a file or directory. 548 */ 549 int 550 msdosfs_write(v) 551 void *v; 552 { 553 struct vop_write_args /* { 554 struct vnode *a_vp; 555 struct uio *a_uio; 556 int a_ioflag; 557 kauth_cred_t a_cred; 558 } */ *ap = v; 559 int resid, flags, extended = 0; 560 int error = 0; 561 int ioflag = ap->a_ioflag; 562 u_long osize; 563 u_long count; 564 void *win; 565 vsize_t bytelen; 566 off_t oldoff; 567 struct uio *uio = ap->a_uio; 568 struct proc *p = curproc; 569 struct vnode *vp = ap->a_vp; 570 struct denode *dep = VTODE(vp); 571 struct msdosfsmount *pmp = dep->de_pmp; 572 kauth_cred_t cred = ap->a_cred; 573 bool async; 574 575 #ifdef MSDOSFS_DEBUG 576 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 577 vp, uio, ioflag, cred); 578 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 579 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 580 #endif 581 582 switch (vp->v_type) { 583 case VREG: 584 if (ioflag & IO_APPEND) 585 uio->uio_offset = dep->de_FileSize; 586 break; 587 case VDIR: 588 return EISDIR; 589 default: 590 panic("msdosfs_write(): bad file type"); 591 } 592 593 if (uio->uio_offset < 0) 594 return (EINVAL); 595 596 if (uio->uio_resid == 0) 597 return (0); 598 599 /* Don't bother to try to write files larger than the fs limit */ 600 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 601 return (EFBIG); 602 603 /* 604 * If they've exceeded their filesize limit, tell them about it. 605 */ 606 if (((uio->uio_offset + uio->uio_resid) > 607 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 608 mutex_enter(&proclist_mutex); 609 psignal(p, SIGXFSZ); 610 mutex_exit(&proclist_mutex); 611 return (EFBIG); 612 } 613 614 /* 615 * If the offset we are starting the write at is beyond the end of 616 * the file, then they've done a seek. Unix filesystems allow 617 * files with holes in them, DOS doesn't so we must fill the hole 618 * with zeroed blocks. 619 */ 620 if (uio->uio_offset > dep->de_FileSize) { 621 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) 622 return (error); 623 } 624 625 /* 626 * Remember some values in case the write fails. 627 */ 628 async = vp->v_mount->mnt_flag & MNT_ASYNC; 629 resid = uio->uio_resid; 630 osize = dep->de_FileSize; 631 632 /* 633 * If we write beyond the end of the file, extend it to its ultimate 634 * size ahead of the time to hopefully get a contiguous area. 635 */ 636 if (uio->uio_offset + resid > osize) { 637 count = de_clcount(pmp, uio->uio_offset + resid) - 638 de_clcount(pmp, osize); 639 if ((error = extendfile(dep, count, NULL, NULL, 0)) && 640 (error != ENOSPC || (ioflag & IO_UNIT))) 641 goto errexit; 642 643 dep->de_FileSize = uio->uio_offset + resid; 644 uvm_vnp_setsize(vp, dep->de_FileSize); 645 extended = 1; 646 } 647 648 do { 649 oldoff = uio->uio_offset; 650 bytelen = uio->uio_resid; 651 652 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, UVM_ADV_NORMAL, 653 UBC_WRITE); 654 error = uiomove(win, bytelen, uio); 655 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 656 ubc_release(win, flags); 657 if (error) 658 break; 659 660 /* 661 * flush what we just wrote if necessary. 662 * XXXUBC simplistic async flushing. 663 */ 664 665 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 666 simple_lock(&vp->v_interlock); 667 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 668 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 669 } 670 } while (error == 0 && uio->uio_resid > 0); 671 if (error == 0 && ioflag & IO_SYNC) { 672 simple_lock(&vp->v_interlock); 673 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 674 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 675 } 676 dep->de_flag |= DE_UPDATE; 677 678 /* 679 * If the write failed and they want us to, truncate the file back 680 * to the size it was before the write was attempted. 681 */ 682 errexit: 683 if (resid > uio->uio_resid) 684 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 685 if (error) { 686 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 687 uio->uio_offset -= resid - uio->uio_resid; 688 uio->uio_resid = resid; 689 } else if ((ioflag & IO_SYNC) == IO_SYNC) 690 error = deupdat(dep, 1); 691 KASSERT(vp->v_size == dep->de_FileSize); 692 return (error); 693 } 694 695 int 696 msdosfs_update(struct vnode *vp, const struct timespec *acc, 697 const struct timespec *mod, int flags) 698 { 699 struct buf *bp; 700 struct direntry *dirp; 701 struct denode *dep; 702 int error; 703 704 if (vp->v_mount->mnt_flag & MNT_RDONLY) 705 return (0); 706 dep = VTODE(vp); 707 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 708 if ((dep->de_flag & DE_MODIFIED) == 0) 709 return (0); 710 dep->de_flag &= ~DE_MODIFIED; 711 if (dep->de_Attributes & ATTR_DIRECTORY) 712 return (0); 713 if (dep->de_refcnt <= 0) 714 return (0); 715 error = readde(dep, &bp, &dirp); 716 if (error) 717 return (error); 718 DE_EXTERNALIZE(dirp, dep); 719 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 720 return (bwrite(bp)); 721 else { 722 bdwrite(bp); 723 return (0); 724 } 725 } 726 727 /* 728 * Flush the blocks of a file to disk. 729 * 730 * This function is worthless for vnodes that represent directories. Maybe we 731 * could just do a sync if they try an fsync on a directory file. 732 */ 733 int 734 msdosfs_remove(v) 735 void *v; 736 { 737 struct vop_remove_args /* { 738 struct vnode *a_dvp; 739 struct vnode *a_vp; 740 struct componentname *a_cnp; 741 } */ *ap = v; 742 struct denode *dep = VTODE(ap->a_vp); 743 struct denode *ddep = VTODE(ap->a_dvp); 744 int error; 745 746 if (ap->a_vp->v_type == VDIR) 747 error = EPERM; 748 else 749 error = removede(ddep, dep); 750 #ifdef MSDOSFS_DEBUG 751 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 752 dep, ap->a_vp->v_usecount); 753 #endif 754 VN_KNOTE(ap->a_vp, NOTE_DELETE); 755 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 756 if (ddep == dep) 757 vrele(ap->a_vp); 758 else 759 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 760 * via vrele() */ 761 vput(ap->a_dvp); 762 return (error); 763 } 764 765 /* 766 * DOS filesystems don't know what links are. But since we already called 767 * msdosfs_lookup() with create and lockparent, the parent is locked so we 768 * have to free it before we return the error. 769 */ 770 int 771 msdosfs_link(v) 772 void *v; 773 { 774 struct vop_link_args /* { 775 struct vnode *a_dvp; 776 struct vnode *a_vp; 777 struct componentname *a_cnp; 778 } */ *ap = v; 779 780 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 781 vput(ap->a_dvp); 782 return (EOPNOTSUPP); 783 } 784 785 /* 786 * Renames on files require moving the denode to a new hash queue since the 787 * denode's location is used to compute which hash queue to put the file 788 * in. Unless it is a rename in place. For example "mv a b". 789 * 790 * What follows is the basic algorithm: 791 * 792 * if (file move) { 793 * if (dest file exists) { 794 * remove dest file 795 * } 796 * if (dest and src in same directory) { 797 * rewrite name in existing directory slot 798 * } else { 799 * write new entry in dest directory 800 * update offset and dirclust in denode 801 * move denode to new hash chain 802 * clear old directory entry 803 * } 804 * } else { 805 * directory move 806 * if (dest directory exists) { 807 * if (dest is not empty) { 808 * return ENOTEMPTY 809 * } 810 * remove dest directory 811 * } 812 * if (dest and src in same directory) { 813 * rewrite name in existing entry 814 * } else { 815 * be sure dest is not a child of src directory 816 * write entry in dest directory 817 * update "." and ".." in moved directory 818 * update offset and dirclust in denode 819 * move denode to new hash chain 820 * clear old directory entry for moved directory 821 * } 822 * } 823 * 824 * On entry: 825 * source's parent directory is unlocked 826 * source file or directory is unlocked 827 * destination's parent directory is locked 828 * destination file or directory is locked if it exists 829 * 830 * On exit: 831 * all denodes should be released 832 * 833 * Notes: 834 * I'm not sure how the memory containing the pathnames pointed at by the 835 * componentname structures is freed, there may be some memory bleeding 836 * for each rename done. 837 */ 838 int 839 msdosfs_rename(v) 840 void *v; 841 { 842 struct vop_rename_args /* { 843 struct vnode *a_fdvp; 844 struct vnode *a_fvp; 845 struct componentname *a_fcnp; 846 struct vnode *a_tdvp; 847 struct vnode *a_tvp; 848 struct componentname *a_tcnp; 849 } */ *ap = v; 850 struct vnode *tvp = ap->a_tvp; 851 struct vnode *tdvp = ap->a_tdvp; 852 struct vnode *fvp = ap->a_fvp; 853 struct vnode *fdvp = ap->a_fdvp; 854 struct componentname *tcnp = ap->a_tcnp; 855 struct componentname *fcnp = ap->a_fcnp; 856 struct lwp *l = tcnp->cn_lwp; 857 struct denode *ip, *xp, *dp, *zp; 858 u_char toname[11], oldname[11]; 859 u_long from_diroffset, to_diroffset; 860 u_char to_count; 861 int doingdirectory = 0, newparent = 0; 862 int error; 863 u_long cn; 864 daddr_t bn; 865 struct msdosfsmount *pmp; 866 struct direntry *dotdotp; 867 struct buf *bp; 868 int fdvp_dorele = 0; 869 870 pmp = VFSTOMSDOSFS(fdvp->v_mount); 871 872 #ifdef DIAGNOSTIC 873 if ((tcnp->cn_flags & HASBUF) == 0 || 874 (fcnp->cn_flags & HASBUF) == 0) 875 panic("msdosfs_rename: no name"); 876 #endif 877 /* 878 * Check for cross-device rename. 879 */ 880 if ((fvp->v_mount != tdvp->v_mount) || 881 (tvp && (fvp->v_mount != tvp->v_mount))) { 882 error = EXDEV; 883 abortit: 884 VOP_ABORTOP(tdvp, tcnp); 885 if (tdvp == tvp) 886 vrele(tdvp); 887 else 888 vput(tdvp); 889 if (tvp) 890 vput(tvp); 891 VOP_ABORTOP(fdvp, fcnp); 892 vrele(fdvp); 893 vrele(fvp); 894 return (error); 895 } 896 897 /* 898 * If source and dest are the same, do nothing. 899 */ 900 if (tvp == fvp) { 901 error = 0; 902 goto abortit; 903 } 904 905 /* */ 906 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 907 goto abortit; 908 dp = VTODE(fdvp); 909 ip = VTODE(fvp); 910 911 /* 912 * Be sure we are not renaming ".", "..", or an alias of ".". This 913 * leads to a crippled directory tree. It's pretty tough to do a 914 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 915 * doesn't work if the ".." entry is missing. 916 */ 917 if (ip->de_Attributes & ATTR_DIRECTORY) { 918 /* 919 * Avoid ".", "..", and aliases of "." for obvious reasons. 920 */ 921 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 922 dp == ip || 923 (fcnp->cn_flags & ISDOTDOT) || 924 (tcnp->cn_flags & ISDOTDOT) || 925 (ip->de_flag & DE_RENAME)) { 926 VOP_UNLOCK(fvp, 0); 927 error = EINVAL; 928 goto abortit; 929 } 930 ip->de_flag |= DE_RENAME; 931 doingdirectory++; 932 } 933 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 934 935 /* 936 * When the target exists, both the directory 937 * and target vnodes are returned locked. 938 */ 939 dp = VTODE(tdvp); 940 xp = tvp ? VTODE(tvp) : NULL; 941 /* 942 * Remember direntry place to use for destination 943 */ 944 to_diroffset = dp->de_fndoffset; 945 to_count = dp->de_fndcnt; 946 947 /* 948 * If ".." must be changed (ie the directory gets a new 949 * parent) then the source directory must not be in the 950 * directory hierarchy above the target, as this would 951 * orphan everything below the source directory. Also 952 * the user must have write permission in the source so 953 * as to be able to change "..". We must repeat the call 954 * to namei, as the parent directory is unlocked by the 955 * call to doscheckpath(). 956 */ 957 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, l); 958 VOP_UNLOCK(fvp, 0); 959 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 960 newparent = 1; 961 vrele(fdvp); 962 if (doingdirectory && newparent) { 963 if (error) /* write access check above */ 964 goto bad; 965 if (xp != NULL) 966 vput(tvp); 967 /* 968 * doscheckpath() vput()'s dp, 969 * so we have to do a relookup afterwards 970 */ 971 if ((error = doscheckpath(ip, dp)) != 0) 972 goto out; 973 if ((tcnp->cn_flags & SAVESTART) == 0) 974 panic("msdosfs_rename: lost to startdir"); 975 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 976 goto out; 977 dp = VTODE(tdvp); 978 xp = tvp ? VTODE(tvp) : NULL; 979 } 980 981 if (xp != NULL) { 982 /* 983 * Target must be empty if a directory and have no links 984 * to it. Also, ensure source and target are compatible 985 * (both directories, or both not directories). 986 */ 987 if (xp->de_Attributes & ATTR_DIRECTORY) { 988 if (!dosdirempty(xp)) { 989 error = ENOTEMPTY; 990 goto bad; 991 } 992 if (!doingdirectory) { 993 error = ENOTDIR; 994 goto bad; 995 } 996 } else if (doingdirectory) { 997 error = EISDIR; 998 goto bad; 999 } 1000 if ((error = removede(dp, xp)) != 0) 1001 goto bad; 1002 VN_KNOTE(tdvp, NOTE_WRITE); 1003 VN_KNOTE(tvp, NOTE_DELETE); 1004 cache_purge(tvp); 1005 vput(tvp); 1006 xp = NULL; 1007 } 1008 1009 /* 1010 * Convert the filename in tcnp into a dos filename. We copy this 1011 * into the denode and directory entry for the destination 1012 * file/directory. 1013 */ 1014 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) 1015 goto abortit; 1016 1017 /* 1018 * Since from wasn't locked at various places above, 1019 * have to do a relookup here. 1020 */ 1021 fcnp->cn_flags &= ~MODMASK; 1022 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1023 if ((fcnp->cn_flags & SAVESTART) == 0) 1024 panic("msdosfs_rename: lost from startdir"); 1025 if (!newparent) 1026 VOP_UNLOCK(tdvp, 0); 1027 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1028 if ((error = relookup(fdvp, &fvp, fcnp))) { 1029 vput(fdvp); 1030 vrele(ap->a_fvp); 1031 vrele(tdvp); 1032 return (error); 1033 } 1034 if (fvp == NULL) { 1035 /* 1036 * From name has disappeared. 1037 */ 1038 if (doingdirectory) 1039 panic("rename: lost dir entry"); 1040 vput(fdvp); 1041 vrele(ap->a_fvp); 1042 vrele(tdvp); 1043 return 0; 1044 } 1045 fdvp_dorele = 1; 1046 xp = VTODE(fvp); 1047 zp = VTODE(fdvp); 1048 from_diroffset = zp->de_fndoffset; 1049 1050 /* 1051 * Ensure that the directory entry still exists and has not 1052 * changed till now. If the source is a file the entry may 1053 * have been unlinked or renamed. In either case there is 1054 * no further work to be done. If the source is a directory 1055 * then it cannot have been rmdir'ed or renamed; this is 1056 * prohibited by the DE_RENAME flag. 1057 */ 1058 if (xp != ip) { 1059 if (doingdirectory) 1060 panic("rename: lost dir entry"); 1061 vrele(ap->a_fvp); 1062 VOP_UNLOCK(fvp, 0); 1063 if (newparent) 1064 VOP_UNLOCK(fdvp, 0); 1065 xp = NULL; 1066 } else { 1067 vrele(fvp); 1068 xp = NULL; 1069 1070 /* 1071 * First write a new entry in the destination 1072 * directory and mark the entry in the source directory 1073 * as deleted. Then move the denode to the correct hash 1074 * chain for its new location in the filesystem. And, if 1075 * we moved a directory, then update its .. entry to point 1076 * to the new parent directory. 1077 */ 1078 memcpy(oldname, ip->de_Name, 11); 1079 memcpy(ip->de_Name, toname, 11); /* update denode */ 1080 dp->de_fndoffset = to_diroffset; 1081 dp->de_fndcnt = to_count; 1082 error = createde(ip, dp, (struct denode **)0, tcnp); 1083 if (error) { 1084 memcpy(ip->de_Name, oldname, 11); 1085 if (newparent) 1086 VOP_UNLOCK(fdvp, 0); 1087 VOP_UNLOCK(fvp, 0); 1088 goto bad; 1089 } 1090 ip->de_refcnt++; 1091 zp->de_fndoffset = from_diroffset; 1092 if ((error = removede(zp, ip)) != 0) { 1093 /* XXX should really panic here, fs is corrupt */ 1094 if (newparent) 1095 VOP_UNLOCK(fdvp, 0); 1096 VOP_UNLOCK(fvp, 0); 1097 goto bad; 1098 } 1099 cache_purge(fvp); 1100 if (!doingdirectory) { 1101 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1102 &ip->de_dirclust, 0); 1103 if (error) { 1104 /* XXX should really panic here, fs is corrupt */ 1105 if (newparent) 1106 VOP_UNLOCK(fdvp, 0); 1107 VOP_UNLOCK(fvp, 0); 1108 goto bad; 1109 } 1110 ip->de_diroffset = to_diroffset; 1111 if (ip->de_dirclust != MSDOSFSROOT) 1112 ip->de_diroffset &= pmp->pm_crbomask; 1113 } 1114 reinsert(ip); 1115 if (newparent) 1116 VOP_UNLOCK(fdvp, 0); 1117 } 1118 1119 /* 1120 * If we moved a directory to a new parent directory, then we must 1121 * fixup the ".." entry in the moved directory. 1122 */ 1123 if (doingdirectory && newparent) { 1124 cn = ip->de_StartCluster; 1125 if (cn == MSDOSFSROOT) { 1126 /* this should never happen */ 1127 panic("msdosfs_rename: updating .. in root directory?"); 1128 } else 1129 bn = cntobn(pmp, cn); 1130 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1131 pmp->pm_bpcluster, NOCRED, &bp); 1132 if (error) { 1133 /* XXX should really panic here, fs is corrupt */ 1134 brelse(bp, 0); 1135 VOP_UNLOCK(fvp, 0); 1136 goto bad; 1137 } 1138 dotdotp = (struct direntry *)bp->b_data + 1; 1139 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1140 if (FAT32(pmp)) { 1141 putushort(dotdotp->deHighClust, 1142 dp->de_StartCluster >> 16); 1143 } else { 1144 putushort(dotdotp->deHighClust, 0); 1145 } 1146 if ((error = bwrite(bp)) != 0) { 1147 /* XXX should really panic here, fs is corrupt */ 1148 VOP_UNLOCK(fvp, 0); 1149 goto bad; 1150 } 1151 } 1152 1153 VN_KNOTE(fvp, NOTE_RENAME); 1154 VOP_UNLOCK(fvp, 0); 1155 bad: 1156 if (xp) 1157 vput(tvp); 1158 vput(tdvp); 1159 out: 1160 ip->de_flag &= ~DE_RENAME; 1161 if (fdvp_dorele) 1162 vrele(fdvp); 1163 vrele(fvp); 1164 return (error); 1165 1166 } 1167 1168 static const struct { 1169 struct direntry dot; 1170 struct direntry dotdot; 1171 } dosdirtemplate = { 1172 { ". ", " ", /* the . entry */ 1173 ATTR_DIRECTORY, /* file attribute */ 1174 0, /* reserved */ 1175 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1176 { 0, 0 }, /* access date */ 1177 { 0, 0 }, /* high bits of start cluster */ 1178 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1179 { 0, 0 }, /* startcluster */ 1180 { 0, 0, 0, 0 } /* filesize */ 1181 }, 1182 { ".. ", " ", /* the .. entry */ 1183 ATTR_DIRECTORY, /* file attribute */ 1184 0, /* reserved */ 1185 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1186 { 0, 0 }, /* access date */ 1187 { 0, 0 }, /* high bits of start cluster */ 1188 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1189 { 0, 0 }, /* startcluster */ 1190 { 0, 0, 0, 0 } /* filesize */ 1191 } 1192 }; 1193 1194 int 1195 msdosfs_mkdir(v) 1196 void *v; 1197 { 1198 struct vop_mkdir_args /* { 1199 struct vnode *a_dvp; 1200 struvt vnode **a_vpp; 1201 struvt componentname *a_cnp; 1202 struct vattr *a_vap; 1203 } */ *ap = v; 1204 struct componentname *cnp = ap->a_cnp; 1205 struct denode ndirent; 1206 struct denode *dep; 1207 struct denode *pdep = VTODE(ap->a_dvp); 1208 int error; 1209 int bn; 1210 u_long newcluster, pcl; 1211 struct direntry *denp; 1212 struct msdosfsmount *pmp = pdep->de_pmp; 1213 struct buf *bp; 1214 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1215 1216 /* 1217 * If this is the root directory and there is no space left we 1218 * can't do anything. This is because the root directory can not 1219 * change size. 1220 */ 1221 if (pdep->de_StartCluster == MSDOSFSROOT 1222 && pdep->de_fndoffset >= pdep->de_FileSize) { 1223 error = ENOSPC; 1224 goto bad2; 1225 } 1226 1227 /* 1228 * Allocate a cluster to hold the about to be created directory. 1229 */ 1230 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1231 if (error) 1232 goto bad2; 1233 1234 memset(&ndirent, 0, sizeof(ndirent)); 1235 ndirent.de_pmp = pmp; 1236 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1237 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1238 1239 /* 1240 * Now fill the cluster with the "." and ".." entries. And write 1241 * the cluster to disk. This way it is there for the parent 1242 * directory to be pointing at if there were a crash. 1243 */ 1244 bn = cntobn(pmp, newcluster); 1245 /* always succeeds */ 1246 bp = getblk(pmp->pm_devvp, de_bn2kb(pmp, bn), pmp->pm_bpcluster, 0, 0); 1247 memset(bp->b_data, 0, pmp->pm_bpcluster); 1248 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1249 denp = (struct direntry *)bp->b_data; 1250 putushort(denp[0].deStartCluster, newcluster); 1251 putushort(denp[0].deCDate, ndirent.de_CDate); 1252 putushort(denp[0].deCTime, ndirent.de_CTime); 1253 denp[0].deCHundredth = ndirent.de_CHun; 1254 putushort(denp[0].deADate, ndirent.de_ADate); 1255 putushort(denp[0].deMDate, ndirent.de_MDate); 1256 putushort(denp[0].deMTime, ndirent.de_MTime); 1257 pcl = pdep->de_StartCluster; 1258 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1259 pcl = 0; 1260 putushort(denp[1].deStartCluster, pcl); 1261 putushort(denp[1].deCDate, ndirent.de_CDate); 1262 putushort(denp[1].deCTime, ndirent.de_CTime); 1263 denp[1].deCHundredth = ndirent.de_CHun; 1264 putushort(denp[1].deADate, ndirent.de_ADate); 1265 putushort(denp[1].deMDate, ndirent.de_MDate); 1266 putushort(denp[1].deMTime, ndirent.de_MTime); 1267 if (FAT32(pmp)) { 1268 putushort(denp[0].deHighClust, newcluster >> 16); 1269 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1270 } else { 1271 putushort(denp[0].deHighClust, 0); 1272 putushort(denp[1].deHighClust, 0); 1273 } 1274 1275 if (async) 1276 bdwrite(bp); 1277 else if ((error = bwrite(bp)) != 0) 1278 goto bad; 1279 1280 /* 1281 * Now build up a directory entry pointing to the newly allocated 1282 * cluster. This will be written to an empty slot in the parent 1283 * directory. 1284 */ 1285 #ifdef DIAGNOSTIC 1286 if ((cnp->cn_flags & HASBUF) == 0) 1287 panic("msdosfs_mkdir: no name"); 1288 #endif 1289 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1290 goto bad; 1291 1292 ndirent.de_Attributes = ATTR_DIRECTORY; 1293 ndirent.de_StartCluster = newcluster; 1294 ndirent.de_FileSize = 0; 1295 ndirent.de_dev = pdep->de_dev; 1296 ndirent.de_devvp = pdep->de_devvp; 1297 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1298 goto bad; 1299 if ((cnp->cn_flags & SAVESTART) == 0) 1300 PNBUF_PUT(cnp->cn_pnbuf); 1301 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1302 vput(ap->a_dvp); 1303 *ap->a_vpp = DETOV(dep); 1304 return (0); 1305 1306 bad: 1307 clusterfree(pmp, newcluster, NULL); 1308 bad2: 1309 PNBUF_PUT(cnp->cn_pnbuf); 1310 vput(ap->a_dvp); 1311 return (error); 1312 } 1313 1314 int 1315 msdosfs_rmdir(v) 1316 void *v; 1317 { 1318 struct vop_rmdir_args /* { 1319 struct vnode *a_dvp; 1320 struct vnode *a_vp; 1321 struct componentname *a_cnp; 1322 } */ *ap = v; 1323 struct vnode *vp = ap->a_vp; 1324 struct vnode *dvp = ap->a_dvp; 1325 struct componentname *cnp = ap->a_cnp; 1326 struct denode *ip, *dp; 1327 int error; 1328 1329 ip = VTODE(vp); 1330 dp = VTODE(dvp); 1331 /* 1332 * No rmdir "." please. 1333 */ 1334 if (dp == ip) { 1335 vrele(dvp); 1336 vput(vp); 1337 return (EINVAL); 1338 } 1339 /* 1340 * Verify the directory is empty (and valid). 1341 * (Rmdir ".." won't be valid since 1342 * ".." will contain a reference to 1343 * the current directory and thus be 1344 * non-empty.) 1345 */ 1346 error = 0; 1347 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1348 error = ENOTEMPTY; 1349 goto out; 1350 } 1351 /* 1352 * Delete the entry from the directory. For dos filesystems this 1353 * gets rid of the directory entry on disk, the in memory copy 1354 * still exists but the de_refcnt is <= 0. This prevents it from 1355 * being found by deget(). When the vput() on dep is done we give 1356 * up access and eventually msdosfs_reclaim() will be called which 1357 * will remove it from the denode cache. 1358 */ 1359 if ((error = removede(dp, ip)) != 0) 1360 goto out; 1361 /* 1362 * This is where we decrement the link count in the parent 1363 * directory. Since dos filesystems don't do this we just purge 1364 * the name cache and let go of the parent directory denode. 1365 */ 1366 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1367 cache_purge(dvp); 1368 vput(dvp); 1369 dvp = NULL; 1370 /* 1371 * Truncate the directory that is being deleted. 1372 */ 1373 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, cnp->cn_lwp); 1374 cache_purge(vp); 1375 out: 1376 VN_KNOTE(vp, NOTE_DELETE); 1377 if (dvp) 1378 vput(dvp); 1379 vput(vp); 1380 return (error); 1381 } 1382 1383 /* 1384 * DOS filesystems don't know what symlinks are. 1385 */ 1386 int 1387 msdosfs_symlink(v) 1388 void *v; 1389 { 1390 struct vop_symlink_args /* { 1391 struct vnode *a_dvp; 1392 struct vnode **a_vpp; 1393 struct componentname *a_cnp; 1394 struct vattr *a_vap; 1395 char *a_target; 1396 } */ *ap = v; 1397 1398 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1399 vput(ap->a_dvp); 1400 return (EOPNOTSUPP); 1401 } 1402 1403 int 1404 msdosfs_readdir(v) 1405 void *v; 1406 { 1407 struct vop_readdir_args /* { 1408 struct vnode *a_vp; 1409 struct uio *a_uio; 1410 kauth_cred_t a_cred; 1411 int *a_eofflag; 1412 off_t **a_cookies; 1413 int *a_ncookies; 1414 } */ *ap = v; 1415 int error = 0; 1416 int diff; 1417 long n; 1418 int blsize; 1419 long on; 1420 long lost; 1421 long count; 1422 u_long cn; 1423 ino_t fileno; 1424 u_long dirsperblk; 1425 long bias = 0; 1426 daddr_t bn, lbn; 1427 struct buf *bp; 1428 struct denode *dep = VTODE(ap->a_vp); 1429 struct msdosfsmount *pmp = dep->de_pmp; 1430 struct direntry *dentp; 1431 struct dirent *dirbuf; 1432 struct uio *uio = ap->a_uio; 1433 off_t *cookies = NULL; 1434 int ncookies = 0, nc = 0; 1435 off_t offset, uio_off; 1436 int chksum = -1; 1437 1438 #ifdef MSDOSFS_DEBUG 1439 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1440 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1441 #endif 1442 1443 /* 1444 * msdosfs_readdir() won't operate properly on regular files since 1445 * it does i/o only with the filesystem vnode, and hence can 1446 * retrieve the wrong block from the buffer cache for a plain file. 1447 * So, fail attempts to readdir() on a plain file. 1448 */ 1449 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1450 return (ENOTDIR); 1451 1452 /* 1453 * If the user buffer is smaller than the size of one dos directory 1454 * entry or the file offset is not a multiple of the size of a 1455 * directory entry, then we fail the read. 1456 */ 1457 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1458 offset = uio->uio_offset; 1459 if (count < sizeof(struct direntry) || 1460 (offset & (sizeof(struct direntry) - 1))) 1461 return (EINVAL); 1462 lost = uio->uio_resid - count; 1463 uio->uio_resid = count; 1464 uio_off = uio->uio_offset; 1465 1466 /* Allocate a temporary dirent buffer. */ 1467 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1468 1469 if (ap->a_ncookies) { 1470 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1471 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1472 *ap->a_cookies = cookies; 1473 } 1474 1475 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1476 1477 /* 1478 * If they are reading from the root directory then, we simulate 1479 * the . and .. entries since these don't exist in the root 1480 * directory. We also set the offset bias to make up for having to 1481 * simulate these entries. By this I mean that at file offset 64 we 1482 * read the first entry in the root directory that lives on disk. 1483 */ 1484 if (dep->de_StartCluster == MSDOSFSROOT 1485 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1486 #if 0 1487 printf("msdosfs_readdir(): going after . or .. in root dir, " 1488 "offset %" PRIu64 "\n", offset); 1489 #endif 1490 bias = 2 * sizeof(struct direntry); 1491 if (offset < bias) { 1492 for (n = (int)offset / sizeof(struct direntry); 1493 n < 2; n++) { 1494 if (FAT32(pmp)) 1495 dirbuf->d_fileno = cntobn(pmp, 1496 (ino_t)pmp->pm_rootdirblk) 1497 * dirsperblk; 1498 else 1499 dirbuf->d_fileno = 1; 1500 dirbuf->d_type = DT_DIR; 1501 switch (n) { 1502 case 0: 1503 dirbuf->d_namlen = 1; 1504 strlcpy(dirbuf->d_name, ".", 1505 sizeof(dirbuf->d_name)); 1506 break; 1507 case 1: 1508 dirbuf->d_namlen = 2; 1509 strlcpy(dirbuf->d_name, "..", 1510 sizeof(dirbuf->d_name)); 1511 break; 1512 } 1513 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1514 if (uio->uio_resid < dirbuf->d_reclen) 1515 goto out; 1516 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1517 if (error) 1518 goto out; 1519 offset += sizeof(struct direntry); 1520 uio_off = offset; 1521 if (cookies) { 1522 *cookies++ = offset; 1523 ncookies++; 1524 if (ncookies >= nc) 1525 goto out; 1526 } 1527 } 1528 } 1529 } 1530 1531 while (uio->uio_resid > 0) { 1532 lbn = de_cluster(pmp, offset - bias); 1533 on = (offset - bias) & pmp->pm_crbomask; 1534 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1535 diff = dep->de_FileSize - (offset - bias); 1536 if (diff <= 0) 1537 break; 1538 n = MIN(n, diff); 1539 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1540 break; 1541 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1542 NOCRED, &bp); 1543 if (error) { 1544 brelse(bp, 0); 1545 free(dirbuf, M_MSDOSFSTMP); 1546 return (error); 1547 } 1548 n = MIN(n, blsize - bp->b_resid); 1549 1550 /* 1551 * Convert from dos directory entries to fs-independent 1552 * directory entries. 1553 */ 1554 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1555 (char *)dentp < (char *)bp->b_data + on + n; 1556 dentp++, offset += sizeof(struct direntry)) { 1557 #if 0 1558 1559 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1560 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1561 #endif 1562 /* 1563 * If this is an unused entry, we can stop. 1564 */ 1565 if (dentp->deName[0] == SLOT_EMPTY) { 1566 brelse(bp, 0); 1567 goto out; 1568 } 1569 /* 1570 * Skip deleted entries. 1571 */ 1572 if (dentp->deName[0] == SLOT_DELETED) { 1573 chksum = -1; 1574 continue; 1575 } 1576 1577 /* 1578 * Handle Win95 long directory entries 1579 */ 1580 if (dentp->deAttributes == ATTR_WIN95) { 1581 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1582 continue; 1583 chksum = win2unixfn((struct winentry *)dentp, 1584 dirbuf, chksum); 1585 continue; 1586 } 1587 1588 /* 1589 * Skip volume labels 1590 */ 1591 if (dentp->deAttributes & ATTR_VOLUME) { 1592 chksum = -1; 1593 continue; 1594 } 1595 /* 1596 * This computation of d_fileno must match 1597 * the computation of va_fileid in 1598 * msdosfs_getattr. 1599 */ 1600 if (dentp->deAttributes & ATTR_DIRECTORY) { 1601 fileno = getushort(dentp->deStartCluster); 1602 if (FAT32(pmp)) 1603 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1604 /* if this is the root directory */ 1605 if (fileno == MSDOSFSROOT) 1606 if (FAT32(pmp)) 1607 fileno = cntobn(pmp, 1608 (ino_t)pmp->pm_rootdirblk) 1609 * dirsperblk; 1610 else 1611 fileno = 1; 1612 else 1613 fileno = cntobn(pmp, fileno) * dirsperblk; 1614 dirbuf->d_fileno = fileno; 1615 dirbuf->d_type = DT_DIR; 1616 } else { 1617 dirbuf->d_fileno = 1618 offset / sizeof(struct direntry); 1619 dirbuf->d_type = DT_REG; 1620 } 1621 if (chksum != winChksum(dentp->deName)) 1622 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1623 (u_char *)dirbuf->d_name, 1624 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1625 else 1626 dirbuf->d_name[dirbuf->d_namlen] = 0; 1627 chksum = -1; 1628 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1629 if (uio->uio_resid < dirbuf->d_reclen) { 1630 brelse(bp, 0); 1631 goto out; 1632 } 1633 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1634 if (error) { 1635 brelse(bp, 0); 1636 goto out; 1637 } 1638 uio_off = offset + sizeof(struct direntry); 1639 if (cookies) { 1640 *cookies++ = offset + sizeof(struct direntry); 1641 ncookies++; 1642 if (ncookies >= nc) { 1643 brelse(bp, 0); 1644 goto out; 1645 } 1646 } 1647 } 1648 brelse(bp, 0); 1649 } 1650 1651 out: 1652 uio->uio_offset = uio_off; 1653 uio->uio_resid += lost; 1654 if (dep->de_FileSize - (offset - bias) <= 0) 1655 *ap->a_eofflag = 1; 1656 else 1657 *ap->a_eofflag = 0; 1658 1659 if (ap->a_ncookies) { 1660 if (error) { 1661 free(*ap->a_cookies, M_TEMP); 1662 *ap->a_ncookies = 0; 1663 *ap->a_cookies = NULL; 1664 } else 1665 *ap->a_ncookies = ncookies; 1666 } 1667 free(dirbuf, M_MSDOSFSTMP); 1668 return (error); 1669 } 1670 1671 /* 1672 * DOS filesystems don't know what symlinks are. 1673 */ 1674 int 1675 msdosfs_readlink(void *v) 1676 { 1677 #if 0 1678 struct vop_readlink_args /* { 1679 struct vnode *a_vp; 1680 struct uio *a_uio; 1681 kauth_cred_t a_cred; 1682 } */ *ap; 1683 #endif 1684 1685 return (EINVAL); 1686 } 1687 1688 /* 1689 * vp - address of vnode file the file 1690 * bn - which cluster we are interested in mapping to a filesystem block number. 1691 * vpp - returns the vnode for the block special file holding the filesystem 1692 * containing the file of interest 1693 * bnp - address of where to return the filesystem relative block number 1694 */ 1695 int 1696 msdosfs_bmap(v) 1697 void *v; 1698 { 1699 struct vop_bmap_args /* { 1700 struct vnode *a_vp; 1701 daddr_t a_bn; 1702 struct vnode **a_vpp; 1703 daddr_t *a_bnp; 1704 int *a_runp; 1705 } */ *ap = v; 1706 struct denode *dep = VTODE(ap->a_vp); 1707 int status; 1708 1709 if (ap->a_vpp != NULL) 1710 *ap->a_vpp = dep->de_devvp; 1711 if (ap->a_bnp == NULL) 1712 return (0); 1713 if (ap->a_runp) { 1714 /* 1715 * Sequential clusters should be counted here. 1716 */ 1717 *ap->a_runp = 0; 1718 } 1719 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1720 /* 1721 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1722 */ 1723 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1724 return status; 1725 } 1726 1727 int 1728 msdosfs_strategy(v) 1729 void *v; 1730 { 1731 struct vop_strategy_args /* { 1732 struct vnode *a_vp; 1733 struct buf *a_bp; 1734 } */ *ap = v; 1735 struct vnode *vp = ap->a_vp; 1736 struct buf *bp = ap->a_bp; 1737 struct denode *dep = VTODE(bp->b_vp); 1738 int error = 0; 1739 1740 if (vp->v_type == VBLK || vp->v_type == VCHR) 1741 panic("msdosfs_strategy: spec"); 1742 /* 1743 * If we don't already know the filesystem relative block number 1744 * then get it using pcbmap(). If pcbmap() returns the block 1745 * number as -1 then we've got a hole in the file. DOS filesystems 1746 * don't allow files with holes, so we shouldn't ever see this. 1747 */ 1748 if (bp->b_blkno == bp->b_lblkno) { 1749 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1750 &bp->b_blkno, 0, 0); 1751 if (error) 1752 bp->b_blkno = -1; 1753 if (bp->b_blkno == -1) 1754 clrbuf(bp); 1755 else 1756 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1757 } 1758 if (bp->b_blkno == -1) { 1759 biodone(bp); 1760 return (error); 1761 } 1762 1763 /* 1764 * Read/write the block from/to the disk that contains the desired 1765 * file block. 1766 */ 1767 1768 vp = dep->de_devvp; 1769 return (VOP_STRATEGY(vp, bp)); 1770 } 1771 1772 int 1773 msdosfs_print(v) 1774 void *v; 1775 { 1776 struct vop_print_args /* { 1777 struct vnode *vp; 1778 } */ *ap = v; 1779 struct denode *dep = VTODE(ap->a_vp); 1780 1781 printf( 1782 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1783 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1784 printf(" dev %d, %d ", major(dep->de_dev), minor(dep->de_dev)); 1785 lockmgr_printinfo(&ap->a_vp->v_lock); 1786 printf("\n"); 1787 return (0); 1788 } 1789 1790 int 1791 msdosfs_advlock(v) 1792 void *v; 1793 { 1794 struct vop_advlock_args /* { 1795 struct vnode *a_vp; 1796 void *a_id; 1797 int a_op; 1798 struct flock *a_fl; 1799 int a_flags; 1800 } */ *ap = v; 1801 struct denode *dep = VTODE(ap->a_vp); 1802 1803 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1804 } 1805 1806 int 1807 msdosfs_pathconf(v) 1808 void *v; 1809 { 1810 struct vop_pathconf_args /* { 1811 struct vnode *a_vp; 1812 int a_name; 1813 register_t *a_retval; 1814 } */ *ap = v; 1815 1816 switch (ap->a_name) { 1817 case _PC_LINK_MAX: 1818 *ap->a_retval = 1; 1819 return (0); 1820 case _PC_NAME_MAX: 1821 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1822 return (0); 1823 case _PC_PATH_MAX: 1824 *ap->a_retval = PATH_MAX; 1825 return (0); 1826 case _PC_CHOWN_RESTRICTED: 1827 *ap->a_retval = 1; 1828 return (0); 1829 case _PC_NO_TRUNC: 1830 *ap->a_retval = 0; 1831 return (0); 1832 case _PC_SYNC_IO: 1833 *ap->a_retval = 1; 1834 return (0); 1835 case _PC_FILESIZEBITS: 1836 *ap->a_retval = 32; 1837 return (0); 1838 default: 1839 return (EINVAL); 1840 } 1841 /* NOTREACHED */ 1842 } 1843 1844 int 1845 msdosfs_fsync(v) 1846 void *v; 1847 { 1848 struct vop_fsync_args /* { 1849 struct vnode *a_vp; 1850 kauth_cred_t a_cred; 1851 int a_flags; 1852 off_t offlo; 1853 off_t offhi; 1854 struct lwp *a_l; 1855 } */ *ap = v; 1856 struct vnode *vp = ap->a_vp; 1857 int wait; 1858 int error; 1859 1860 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1861 vflushbuf(vp, wait); 1862 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 1863 error = 0; 1864 else 1865 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1866 1867 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1868 struct denode *dep = VTODE(vp); 1869 struct vnode *devvp = dep->de_devvp; 1870 1871 int l = 0; 1872 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1873 ap->a_l->l_cred, ap->a_l); 1874 } 1875 1876 return (error); 1877 } 1878 1879 void 1880 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1881 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1882 { 1883 struct timespec *ts = NULL, tsb; 1884 1885 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1886 /* XXX just call getnanotime early and use result if needed? */ 1887 dep->de_flag |= DE_MODIFIED; 1888 if (dep->de_flag & DE_UPDATE) { 1889 if (mod == NULL) { 1890 getnanotime(&tsb); 1891 mod = ts = &tsb; 1892 } 1893 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1894 dep->de_Attributes |= ATTR_ARCHIVE; 1895 } 1896 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1897 if (dep->de_flag & DE_ACCESS) { 1898 if (acc == NULL) 1899 acc = ts == NULL ? 1900 (getnanotime(&tsb), ts = &tsb) : ts; 1901 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1902 } 1903 if (dep->de_flag & DE_CREATE) { 1904 if (cre == NULL) 1905 cre = ts == NULL ? 1906 (getnanotime(&tsb), ts = &tsb) : ts; 1907 unix2dostime(cre, gmtoff, &dep->de_CDate, 1908 &dep->de_CTime, &dep->de_CHun); 1909 } 1910 } 1911 1912 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1913 } 1914 1915 /* Global vfs data structures for msdosfs */ 1916 int (**msdosfs_vnodeop_p)(void *); 1917 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1918 { &vop_default_desc, vn_default_error }, 1919 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1920 { &vop_create_desc, msdosfs_create }, /* create */ 1921 { &vop_mknod_desc, msdosfs_mknod }, /* mknod */ 1922 { &vop_open_desc, msdosfs_open }, /* open */ 1923 { &vop_close_desc, msdosfs_close }, /* close */ 1924 { &vop_access_desc, msdosfs_access }, /* access */ 1925 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1926 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1927 { &vop_read_desc, msdosfs_read }, /* read */ 1928 { &vop_write_desc, msdosfs_write }, /* write */ 1929 { &vop_lease_desc, msdosfs_lease_check }, /* lease */ 1930 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1931 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1932 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1933 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1934 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1935 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1936 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1937 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1938 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1939 { &vop_link_desc, msdosfs_link }, /* link */ 1940 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1941 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1942 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1943 { &vop_symlink_desc, msdosfs_symlink }, /* symlink */ 1944 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1945 { &vop_readlink_desc, msdosfs_readlink }, /* readlink */ 1946 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1947 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1948 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1949 { &vop_lock_desc, genfs_lock }, /* lock */ 1950 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1951 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1952 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1953 { &vop_print_desc, msdosfs_print }, /* print */ 1954 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1955 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1956 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1957 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1958 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1959 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1960 { NULL, NULL } 1961 }; 1962 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1963 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1964