1 /* $NetBSD: msdosfs_vnops.c,v 1.32 2006/10/12 01:32:11 christos 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 1.32 2006/10/12 01:32:11 christos 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 __unused) 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 &ap->a_l->l_acflag)) && 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 &ap->a_l->l_acflag))) 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 &ap->a_l->l_acflag))) 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 block # */ 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, lbn, blsize, NOCRED, &bp); 530 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 531 if (error) { 532 brelse(bp); 533 return (error); 534 } 535 error = uiomove(bp->b_data + on, (int) n, uio); 536 brelse(bp); 537 } while (error == 0 && uio->uio_resid > 0 && n != 0); 538 539 out: 540 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 541 error = deupdat(dep, 1); 542 return (error); 543 } 544 545 /* 546 * Write data to a file or directory. 547 */ 548 int 549 msdosfs_write(v) 550 void *v; 551 { 552 struct vop_write_args /* { 553 struct vnode *a_vp; 554 struct uio *a_uio; 555 int a_ioflag; 556 kauth_cred_t a_cred; 557 } */ *ap = v; 558 int resid, flags, extended = 0; 559 int error = 0; 560 int ioflag = ap->a_ioflag; 561 u_long osize; 562 u_long count; 563 void *win; 564 vsize_t bytelen; 565 off_t oldoff; 566 struct uio *uio = ap->a_uio; 567 struct proc *p = curproc; 568 struct vnode *vp = ap->a_vp; 569 struct denode *dep = VTODE(vp); 570 struct msdosfsmount *pmp = dep->de_pmp; 571 kauth_cred_t cred = ap->a_cred; 572 boolean_t async; 573 574 #ifdef MSDOSFS_DEBUG 575 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 576 vp, uio, ioflag, cred); 577 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 578 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 579 #endif 580 581 switch (vp->v_type) { 582 case VREG: 583 if (ioflag & IO_APPEND) 584 uio->uio_offset = dep->de_FileSize; 585 break; 586 case VDIR: 587 return EISDIR; 588 default: 589 panic("msdosfs_write(): bad file type"); 590 } 591 592 if (uio->uio_offset < 0) 593 return (EINVAL); 594 595 if (uio->uio_resid == 0) 596 return (0); 597 598 /* Don't bother to try to write files larger than the fs limit */ 599 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 600 return (EFBIG); 601 602 /* 603 * If they've exceeded their filesize limit, tell them about it. 604 */ 605 if (((uio->uio_offset + uio->uio_resid) > 606 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 607 psignal(p, SIGXFSZ); 608 return (EFBIG); 609 } 610 611 /* 612 * If the offset we are starting the write at is beyond the end of 613 * the file, then they've done a seek. Unix filesystems allow 614 * files with holes in them, DOS doesn't so we must fill the hole 615 * with zeroed blocks. 616 */ 617 if (uio->uio_offset > dep->de_FileSize) { 618 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) 619 return (error); 620 } 621 622 /* 623 * Remember some values in case the write fails. 624 */ 625 async = vp->v_mount->mnt_flag & MNT_ASYNC; 626 resid = uio->uio_resid; 627 osize = dep->de_FileSize; 628 629 /* 630 * If we write beyond the end of the file, extend it to its ultimate 631 * size ahead of the time to hopefully get a contiguous area. 632 */ 633 if (uio->uio_offset + resid > osize) { 634 count = de_clcount(pmp, uio->uio_offset + resid) - 635 de_clcount(pmp, osize); 636 if ((error = extendfile(dep, count, NULL, NULL, 0)) && 637 (error != ENOSPC || (ioflag & IO_UNIT))) 638 goto errexit; 639 640 dep->de_FileSize = uio->uio_offset + resid; 641 uvm_vnp_setsize(vp, dep->de_FileSize); 642 extended = 1; 643 } 644 645 do { 646 oldoff = uio->uio_offset; 647 bytelen = uio->uio_resid; 648 649 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, UVM_ADV_NORMAL, 650 UBC_WRITE); 651 error = uiomove(win, bytelen, uio); 652 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 653 ubc_release(win, flags); 654 if (error) { 655 break; 656 } 657 658 /* 659 * flush what we just wrote if necessary. 660 * XXXUBC simplistic async flushing. 661 */ 662 663 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 664 simple_lock(&vp->v_interlock); 665 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 666 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 667 } 668 } while (error == 0 && uio->uio_resid > 0); 669 if (error == 0 && ioflag & IO_SYNC) { 670 simple_lock(&vp->v_interlock); 671 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 672 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 673 } 674 dep->de_flag |= DE_UPDATE; 675 676 /* 677 * If the write failed and they want us to, truncate the file back 678 * to the size it was before the write was attempted. 679 */ 680 errexit: 681 if (resid > uio->uio_resid) 682 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 683 if (error) { 684 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 685 uio->uio_offset -= resid - uio->uio_resid; 686 uio->uio_resid = resid; 687 } else if ((ioflag & IO_SYNC) == IO_SYNC) 688 error = deupdat(dep, 1); 689 KASSERT(vp->v_size == dep->de_FileSize); 690 return (error); 691 } 692 693 int 694 msdosfs_update(struct vnode *vp, const struct timespec *acc, 695 const struct timespec *mod, int flags) 696 { 697 struct buf *bp; 698 struct direntry *dirp; 699 struct denode *dep; 700 int error; 701 702 if (vp->v_mount->mnt_flag & MNT_RDONLY) 703 return (0); 704 dep = VTODE(vp); 705 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 706 if ((dep->de_flag & DE_MODIFIED) == 0) 707 return (0); 708 dep->de_flag &= ~DE_MODIFIED; 709 if (dep->de_Attributes & ATTR_DIRECTORY) 710 return (0); 711 if (dep->de_refcnt <= 0) 712 return (0); 713 error = readde(dep, &bp, &dirp); 714 if (error) 715 return (error); 716 DE_EXTERNALIZE(dirp, dep); 717 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 718 return (bwrite(bp)); 719 else { 720 bdwrite(bp); 721 return (0); 722 } 723 } 724 725 /* 726 * Flush the blocks of a file to disk. 727 * 728 * This function is worthless for vnodes that represent directories. Maybe we 729 * could just do a sync if they try an fsync on a directory file. 730 */ 731 int 732 msdosfs_remove(v) 733 void *v; 734 { 735 struct vop_remove_args /* { 736 struct vnode *a_dvp; 737 struct vnode *a_vp; 738 struct componentname *a_cnp; 739 } */ *ap = v; 740 struct denode *dep = VTODE(ap->a_vp); 741 struct denode *ddep = VTODE(ap->a_dvp); 742 int error; 743 744 if (ap->a_vp->v_type == VDIR) 745 error = EPERM; 746 else 747 error = removede(ddep, dep); 748 #ifdef MSDOSFS_DEBUG 749 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 750 dep, ap->a_vp->v_usecount); 751 #endif 752 VN_KNOTE(ap->a_vp, NOTE_DELETE); 753 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 754 if (ddep == dep) 755 vrele(ap->a_vp); 756 else 757 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 758 * via vrele() */ 759 vput(ap->a_dvp); 760 return (error); 761 } 762 763 /* 764 * DOS filesystems don't know what links are. But since we already called 765 * msdosfs_lookup() with create and lockparent, the parent is locked so we 766 * have to free it before we return the error. 767 */ 768 int 769 msdosfs_link(v) 770 void *v; 771 { 772 struct vop_link_args /* { 773 struct vnode *a_dvp; 774 struct vnode *a_vp; 775 struct componentname *a_cnp; 776 } */ *ap = v; 777 778 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 779 vput(ap->a_dvp); 780 return (EOPNOTSUPP); 781 } 782 783 /* 784 * Renames on files require moving the denode to a new hash queue since the 785 * denode's location is used to compute which hash queue to put the file 786 * in. Unless it is a rename in place. For example "mv a b". 787 * 788 * What follows is the basic algorithm: 789 * 790 * if (file move) { 791 * if (dest file exists) { 792 * remove dest file 793 * } 794 * if (dest and src in same directory) { 795 * rewrite name in existing directory slot 796 * } else { 797 * write new entry in dest directory 798 * update offset and dirclust in denode 799 * move denode to new hash chain 800 * clear old directory entry 801 * } 802 * } else { 803 * directory move 804 * if (dest directory exists) { 805 * if (dest is not empty) { 806 * return ENOTEMPTY 807 * } 808 * remove dest directory 809 * } 810 * if (dest and src in same directory) { 811 * rewrite name in existing entry 812 * } else { 813 * be sure dest is not a child of src directory 814 * write entry in dest directory 815 * update "." and ".." in moved directory 816 * update offset and dirclust in denode 817 * move denode to new hash chain 818 * clear old directory entry for moved directory 819 * } 820 * } 821 * 822 * On entry: 823 * source's parent directory is unlocked 824 * source file or directory is unlocked 825 * destination's parent directory is locked 826 * destination file or directory is locked if it exists 827 * 828 * On exit: 829 * all denodes should be released 830 * 831 * Notes: 832 * I'm not sure how the memory containing the pathnames pointed at by the 833 * componentname structures is freed, there may be some memory bleeding 834 * for each rename done. 835 */ 836 int 837 msdosfs_rename(v) 838 void *v; 839 { 840 struct vop_rename_args /* { 841 struct vnode *a_fdvp; 842 struct vnode *a_fvp; 843 struct componentname *a_fcnp; 844 struct vnode *a_tdvp; 845 struct vnode *a_tvp; 846 struct componentname *a_tcnp; 847 } */ *ap = v; 848 struct vnode *tvp = ap->a_tvp; 849 struct vnode *tdvp = ap->a_tdvp; 850 struct vnode *fvp = ap->a_fvp; 851 struct vnode *fdvp = ap->a_fdvp; 852 struct componentname *tcnp = ap->a_tcnp; 853 struct componentname *fcnp = ap->a_fcnp; 854 struct lwp *l = tcnp->cn_lwp; 855 struct denode *ip, *xp, *dp, *zp; 856 u_char toname[11], oldname[11]; 857 u_long from_diroffset, to_diroffset; 858 u_char to_count; 859 int doingdirectory = 0, newparent = 0; 860 int error; 861 u_long cn; 862 daddr_t bn; 863 struct msdosfsmount *pmp; 864 struct direntry *dotdotp; 865 struct buf *bp; 866 int fdvp_dorele = 0; 867 868 pmp = VFSTOMSDOSFS(fdvp->v_mount); 869 870 #ifdef DIAGNOSTIC 871 if ((tcnp->cn_flags & HASBUF) == 0 || 872 (fcnp->cn_flags & HASBUF) == 0) 873 panic("msdosfs_rename: no name"); 874 #endif 875 /* 876 * Check for cross-device rename. 877 */ 878 if ((fvp->v_mount != tdvp->v_mount) || 879 (tvp && (fvp->v_mount != tvp->v_mount))) { 880 error = EXDEV; 881 abortit: 882 VOP_ABORTOP(tdvp, tcnp); 883 if (tdvp == tvp) 884 vrele(tdvp); 885 else 886 vput(tdvp); 887 if (tvp) 888 vput(tvp); 889 VOP_ABORTOP(fdvp, fcnp); 890 vrele(fdvp); 891 vrele(fvp); 892 return (error); 893 } 894 895 /* 896 * If source and dest are the same, do nothing. 897 */ 898 if (tvp == fvp) { 899 error = 0; 900 goto abortit; 901 } 902 903 /* */ 904 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 905 goto abortit; 906 dp = VTODE(fdvp); 907 ip = VTODE(fvp); 908 909 /* 910 * Be sure we are not renaming ".", "..", or an alias of ".". This 911 * leads to a crippled directory tree. It's pretty tough to do a 912 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 913 * doesn't work if the ".." entry is missing. 914 */ 915 if (ip->de_Attributes & ATTR_DIRECTORY) { 916 /* 917 * Avoid ".", "..", and aliases of "." for obvious reasons. 918 */ 919 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 920 dp == ip || 921 (fcnp->cn_flags & ISDOTDOT) || 922 (tcnp->cn_flags & ISDOTDOT) || 923 (ip->de_flag & DE_RENAME)) { 924 VOP_UNLOCK(fvp, 0); 925 error = EINVAL; 926 goto abortit; 927 } 928 ip->de_flag |= DE_RENAME; 929 doingdirectory++; 930 } 931 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 932 933 /* 934 * When the target exists, both the directory 935 * and target vnodes are returned locked. 936 */ 937 dp = VTODE(tdvp); 938 xp = tvp ? VTODE(tvp) : NULL; 939 /* 940 * Remember direntry place to use for destination 941 */ 942 to_diroffset = dp->de_fndoffset; 943 to_count = dp->de_fndcnt; 944 945 /* 946 * If ".." must be changed (ie the directory gets a new 947 * parent) then the source directory must not be in the 948 * directory hierarchy above the target, as this would 949 * orphan everything below the source directory. Also 950 * the user must have write permission in the source so 951 * as to be able to change "..". We must repeat the call 952 * to namei, as the parent directory is unlocked by the 953 * call to doscheckpath(). 954 */ 955 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, l); 956 VOP_UNLOCK(fvp, 0); 957 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 958 newparent = 1; 959 vrele(fdvp); 960 if (doingdirectory && newparent) { 961 if (error) /* write access check above */ 962 goto bad; 963 if (xp != NULL) 964 vput(tvp); 965 /* 966 * doscheckpath() vput()'s dp, 967 * so we have to do a relookup afterwards 968 */ 969 if ((error = doscheckpath(ip, dp)) != 0) 970 goto out; 971 if ((tcnp->cn_flags & SAVESTART) == 0) 972 panic("msdosfs_rename: lost to startdir"); 973 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 974 goto out; 975 dp = VTODE(tdvp); 976 xp = tvp ? VTODE(tvp) : NULL; 977 } 978 979 if (xp != NULL) { 980 /* 981 * Target must be empty if a directory and have no links 982 * to it. Also, ensure source and target are compatible 983 * (both directories, or both not directories). 984 */ 985 if (xp->de_Attributes & ATTR_DIRECTORY) { 986 if (!dosdirempty(xp)) { 987 error = ENOTEMPTY; 988 goto bad; 989 } 990 if (!doingdirectory) { 991 error = ENOTDIR; 992 goto bad; 993 } 994 } else if (doingdirectory) { 995 error = EISDIR; 996 goto bad; 997 } 998 if ((error = removede(dp, xp)) != 0) 999 goto bad; 1000 VN_KNOTE(tdvp, NOTE_WRITE); 1001 VN_KNOTE(tvp, NOTE_DELETE); 1002 cache_purge(tvp); 1003 vput(tvp); 1004 xp = NULL; 1005 } 1006 1007 /* 1008 * Convert the filename in tcnp into a dos filename. We copy this 1009 * into the denode and directory entry for the destination 1010 * file/directory. 1011 */ 1012 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) 1013 goto abortit; 1014 1015 /* 1016 * Since from wasn't locked at various places above, 1017 * have to do a relookup here. 1018 */ 1019 fcnp->cn_flags &= ~MODMASK; 1020 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1021 if ((fcnp->cn_flags & SAVESTART) == 0) 1022 panic("msdosfs_rename: lost from startdir"); 1023 if (!newparent) 1024 VOP_UNLOCK(tdvp, 0); 1025 (void) relookup(fdvp, &fvp, fcnp); 1026 if (fvp == NULL) { 1027 /* 1028 * From name has disappeared. 1029 */ 1030 if (doingdirectory) 1031 panic("rename: lost dir entry"); 1032 vrele(ap->a_fvp); 1033 if (newparent) 1034 VOP_UNLOCK(tdvp, 0); 1035 vrele(tdvp); 1036 return 0; 1037 } 1038 fdvp_dorele = 1; 1039 xp = VTODE(fvp); 1040 zp = VTODE(fdvp); 1041 from_diroffset = zp->de_fndoffset; 1042 1043 /* 1044 * Ensure that the directory entry still exists and has not 1045 * changed till now. If the source is a file the entry may 1046 * have been unlinked or renamed. In either case there is 1047 * no further work to be done. If the source is a directory 1048 * then it cannot have been rmdir'ed or renamed; this is 1049 * prohibited by the DE_RENAME flag. 1050 */ 1051 if (xp != ip) { 1052 if (doingdirectory) 1053 panic("rename: lost dir entry"); 1054 vrele(ap->a_fvp); 1055 VOP_UNLOCK(fvp, 0); 1056 if (newparent) 1057 VOP_UNLOCK(fdvp, 0); 1058 xp = NULL; 1059 } else { 1060 vrele(fvp); 1061 xp = NULL; 1062 1063 /* 1064 * First write a new entry in the destination 1065 * directory and mark the entry in the source directory 1066 * as deleted. Then move the denode to the correct hash 1067 * chain for its new location in the filesystem. And, if 1068 * we moved a directory, then update its .. entry to point 1069 * to the new parent directory. 1070 */ 1071 memcpy(oldname, ip->de_Name, 11); 1072 memcpy(ip->de_Name, toname, 11); /* update denode */ 1073 dp->de_fndoffset = to_diroffset; 1074 dp->de_fndcnt = to_count; 1075 error = createde(ip, dp, (struct denode **)0, tcnp); 1076 if (error) { 1077 memcpy(ip->de_Name, oldname, 11); 1078 if (newparent) 1079 VOP_UNLOCK(fdvp, 0); 1080 VOP_UNLOCK(fvp, 0); 1081 goto bad; 1082 } 1083 ip->de_refcnt++; 1084 zp->de_fndoffset = from_diroffset; 1085 if ((error = removede(zp, ip)) != 0) { 1086 /* XXX should really panic here, fs is corrupt */ 1087 if (newparent) 1088 VOP_UNLOCK(fdvp, 0); 1089 VOP_UNLOCK(fvp, 0); 1090 goto bad; 1091 } 1092 cache_purge(fvp); 1093 if (!doingdirectory) { 1094 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1095 &ip->de_dirclust, 0); 1096 if (error) { 1097 /* XXX should really panic here, fs is corrupt */ 1098 if (newparent) 1099 VOP_UNLOCK(fdvp, 0); 1100 VOP_UNLOCK(fvp, 0); 1101 goto bad; 1102 } 1103 ip->de_diroffset = to_diroffset; 1104 if (ip->de_dirclust != MSDOSFSROOT) 1105 ip->de_diroffset &= pmp->pm_crbomask; 1106 } 1107 reinsert(ip); 1108 if (newparent) 1109 VOP_UNLOCK(fdvp, 0); 1110 } 1111 1112 /* 1113 * If we moved a directory to a new parent directory, then we must 1114 * fixup the ".." entry in the moved directory. 1115 */ 1116 if (doingdirectory && newparent) { 1117 cn = ip->de_StartCluster; 1118 if (cn == MSDOSFSROOT) { 1119 /* this should never happen */ 1120 panic("msdosfs_rename: updating .. in root directory?"); 1121 } else 1122 bn = cntobn(pmp, cn); 1123 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1124 NOCRED, &bp); 1125 if (error) { 1126 /* XXX should really panic here, fs is corrupt */ 1127 brelse(bp); 1128 VOP_UNLOCK(fvp, 0); 1129 goto bad; 1130 } 1131 dotdotp = (struct direntry *)bp->b_data + 1; 1132 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1133 if (FAT32(pmp)) { 1134 putushort(dotdotp->deHighClust, 1135 dp->de_StartCluster >> 16); 1136 } else { 1137 putushort(dotdotp->deHighClust, 0); 1138 } 1139 if ((error = bwrite(bp)) != 0) { 1140 /* XXX should really panic here, fs is corrupt */ 1141 VOP_UNLOCK(fvp, 0); 1142 goto bad; 1143 } 1144 } 1145 1146 VN_KNOTE(fvp, NOTE_RENAME); 1147 VOP_UNLOCK(fvp, 0); 1148 bad: 1149 if (xp) 1150 vput(tvp); 1151 vput(tdvp); 1152 out: 1153 ip->de_flag &= ~DE_RENAME; 1154 if (fdvp_dorele) 1155 vrele(fdvp); 1156 vrele(fvp); 1157 return (error); 1158 1159 } 1160 1161 static const struct { 1162 struct direntry dot; 1163 struct direntry dotdot; 1164 } dosdirtemplate = { 1165 { ". ", " ", /* the . entry */ 1166 ATTR_DIRECTORY, /* file attribute */ 1167 0, /* reserved */ 1168 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1169 { 0, 0 }, /* access date */ 1170 { 0, 0 }, /* high bits of start cluster */ 1171 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1172 { 0, 0 }, /* startcluster */ 1173 { 0, 0, 0, 0 } /* filesize */ 1174 }, 1175 { ".. ", " ", /* the .. entry */ 1176 ATTR_DIRECTORY, /* file attribute */ 1177 0, /* reserved */ 1178 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1179 { 0, 0 }, /* access date */ 1180 { 0, 0 }, /* high bits of start cluster */ 1181 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1182 { 0, 0 }, /* startcluster */ 1183 { 0, 0, 0, 0 } /* filesize */ 1184 } 1185 }; 1186 1187 int 1188 msdosfs_mkdir(v) 1189 void *v; 1190 { 1191 struct vop_mkdir_args /* { 1192 struct vnode *a_dvp; 1193 struvt vnode **a_vpp; 1194 struvt componentname *a_cnp; 1195 struct vattr *a_vap; 1196 } */ *ap = v; 1197 struct componentname *cnp = ap->a_cnp; 1198 struct denode ndirent; 1199 struct denode *dep; 1200 struct denode *pdep = VTODE(ap->a_dvp); 1201 int error; 1202 int bn; 1203 u_long newcluster, pcl; 1204 struct direntry *denp; 1205 struct msdosfsmount *pmp = pdep->de_pmp; 1206 struct buf *bp; 1207 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1208 1209 /* 1210 * If this is the root directory and there is no space left we 1211 * can't do anything. This is because the root directory can not 1212 * change size. 1213 */ 1214 if (pdep->de_StartCluster == MSDOSFSROOT 1215 && pdep->de_fndoffset >= pdep->de_FileSize) { 1216 error = ENOSPC; 1217 goto bad2; 1218 } 1219 1220 /* 1221 * Allocate a cluster to hold the about to be created directory. 1222 */ 1223 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1224 if (error) 1225 goto bad2; 1226 1227 memset(&ndirent, 0, sizeof(ndirent)); 1228 ndirent.de_pmp = pmp; 1229 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1230 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1231 1232 /* 1233 * Now fill the cluster with the "." and ".." entries. And write 1234 * the cluster to disk. This way it is there for the parent 1235 * directory to be pointing at if there were a crash. 1236 */ 1237 bn = cntobn(pmp, newcluster); 1238 /* always succeeds */ 1239 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1240 memset(bp->b_data, 0, pmp->pm_bpcluster); 1241 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1242 denp = (struct direntry *)bp->b_data; 1243 putushort(denp[0].deStartCluster, newcluster); 1244 putushort(denp[0].deCDate, ndirent.de_CDate); 1245 putushort(denp[0].deCTime, ndirent.de_CTime); 1246 denp[0].deCHundredth = ndirent.de_CHun; 1247 putushort(denp[0].deADate, ndirent.de_ADate); 1248 putushort(denp[0].deMDate, ndirent.de_MDate); 1249 putushort(denp[0].deMTime, ndirent.de_MTime); 1250 pcl = pdep->de_StartCluster; 1251 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1252 pcl = 0; 1253 putushort(denp[1].deStartCluster, pcl); 1254 putushort(denp[1].deCDate, ndirent.de_CDate); 1255 putushort(denp[1].deCTime, ndirent.de_CTime); 1256 denp[1].deCHundredth = ndirent.de_CHun; 1257 putushort(denp[1].deADate, ndirent.de_ADate); 1258 putushort(denp[1].deMDate, ndirent.de_MDate); 1259 putushort(denp[1].deMTime, ndirent.de_MTime); 1260 if (FAT32(pmp)) { 1261 putushort(denp[0].deHighClust, newcluster >> 16); 1262 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1263 } else { 1264 putushort(denp[0].deHighClust, 0); 1265 putushort(denp[1].deHighClust, 0); 1266 } 1267 1268 if (async) 1269 bdwrite(bp); 1270 else if ((error = bwrite(bp)) != 0) 1271 goto bad; 1272 1273 /* 1274 * Now build up a directory entry pointing to the newly allocated 1275 * cluster. This will be written to an empty slot in the parent 1276 * directory. 1277 */ 1278 #ifdef DIAGNOSTIC 1279 if ((cnp->cn_flags & HASBUF) == 0) 1280 panic("msdosfs_mkdir: no name"); 1281 #endif 1282 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1283 goto bad; 1284 1285 ndirent.de_Attributes = ATTR_DIRECTORY; 1286 ndirent.de_StartCluster = newcluster; 1287 ndirent.de_FileSize = 0; 1288 ndirent.de_dev = pdep->de_dev; 1289 ndirent.de_devvp = pdep->de_devvp; 1290 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1291 goto bad; 1292 if ((cnp->cn_flags & SAVESTART) == 0) 1293 PNBUF_PUT(cnp->cn_pnbuf); 1294 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1295 vput(ap->a_dvp); 1296 *ap->a_vpp = DETOV(dep); 1297 return (0); 1298 1299 bad: 1300 clusterfree(pmp, newcluster, NULL); 1301 bad2: 1302 PNBUF_PUT(cnp->cn_pnbuf); 1303 vput(ap->a_dvp); 1304 return (error); 1305 } 1306 1307 int 1308 msdosfs_rmdir(v) 1309 void *v; 1310 { 1311 struct vop_rmdir_args /* { 1312 struct vnode *a_dvp; 1313 struct vnode *a_vp; 1314 struct componentname *a_cnp; 1315 } */ *ap = v; 1316 struct vnode *vp = ap->a_vp; 1317 struct vnode *dvp = ap->a_dvp; 1318 struct componentname *cnp = ap->a_cnp; 1319 struct denode *ip, *dp; 1320 int error; 1321 1322 ip = VTODE(vp); 1323 dp = VTODE(dvp); 1324 /* 1325 * No rmdir "." please. 1326 */ 1327 if (dp == ip) { 1328 vrele(dvp); 1329 vput(vp); 1330 return (EINVAL); 1331 } 1332 /* 1333 * Verify the directory is empty (and valid). 1334 * (Rmdir ".." won't be valid since 1335 * ".." will contain a reference to 1336 * the current directory and thus be 1337 * non-empty.) 1338 */ 1339 error = 0; 1340 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1341 error = ENOTEMPTY; 1342 goto out; 1343 } 1344 /* 1345 * Delete the entry from the directory. For dos filesystems this 1346 * gets rid of the directory entry on disk, the in memory copy 1347 * still exists but the de_refcnt is <= 0. This prevents it from 1348 * being found by deget(). When the vput() on dep is done we give 1349 * up access and eventually msdosfs_reclaim() will be called which 1350 * will remove it from the denode cache. 1351 */ 1352 if ((error = removede(dp, ip)) != 0) 1353 goto out; 1354 /* 1355 * This is where we decrement the link count in the parent 1356 * directory. Since dos filesystems don't do this we just purge 1357 * the name cache and let go of the parent directory denode. 1358 */ 1359 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1360 cache_purge(dvp); 1361 vput(dvp); 1362 dvp = NULL; 1363 /* 1364 * Truncate the directory that is being deleted. 1365 */ 1366 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, cnp->cn_lwp); 1367 cache_purge(vp); 1368 out: 1369 VN_KNOTE(vp, NOTE_DELETE); 1370 if (dvp) 1371 vput(dvp); 1372 vput(vp); 1373 return (error); 1374 } 1375 1376 /* 1377 * DOS filesystems don't know what symlinks are. 1378 */ 1379 int 1380 msdosfs_symlink(v) 1381 void *v; 1382 { 1383 struct vop_symlink_args /* { 1384 struct vnode *a_dvp; 1385 struct vnode **a_vpp; 1386 struct componentname *a_cnp; 1387 struct vattr *a_vap; 1388 char *a_target; 1389 } */ *ap = v; 1390 1391 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1392 vput(ap->a_dvp); 1393 return (EOPNOTSUPP); 1394 } 1395 1396 int 1397 msdosfs_readdir(v) 1398 void *v; 1399 { 1400 struct vop_readdir_args /* { 1401 struct vnode *a_vp; 1402 struct uio *a_uio; 1403 kauth_cred_t a_cred; 1404 int *a_eofflag; 1405 off_t **a_cookies; 1406 int *a_ncookies; 1407 } */ *ap = v; 1408 int error = 0; 1409 int diff; 1410 long n; 1411 int blsize; 1412 long on; 1413 long lost; 1414 long count; 1415 u_long cn; 1416 ino_t fileno; 1417 u_long dirsperblk; 1418 long bias = 0; 1419 daddr_t bn, lbn; 1420 struct buf *bp; 1421 struct denode *dep = VTODE(ap->a_vp); 1422 struct msdosfsmount *pmp = dep->de_pmp; 1423 struct direntry *dentp; 1424 struct dirent dirbuf; 1425 struct uio *uio = ap->a_uio; 1426 off_t *cookies = NULL; 1427 int ncookies = 0, nc = 0; 1428 off_t offset, uio_off; 1429 int chksum = -1; 1430 1431 #ifdef MSDOSFS_DEBUG 1432 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1433 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1434 #endif 1435 1436 /* 1437 * msdosfs_readdir() won't operate properly on regular files since 1438 * it does i/o only with the filesystem vnode, and hence can 1439 * retrieve the wrong block from the buffer cache for a plain file. 1440 * So, fail attempts to readdir() on a plain file. 1441 */ 1442 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1443 return (ENOTDIR); 1444 1445 /* 1446 * To be safe, initialize dirbuf 1447 */ 1448 memset(dirbuf.d_name, 0, sizeof(dirbuf.d_name)); 1449 1450 /* 1451 * If the user buffer is smaller than the size of one dos directory 1452 * entry or the file offset is not a multiple of the size of a 1453 * directory entry, then we fail the read. 1454 */ 1455 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1456 offset = uio->uio_offset; 1457 if (count < sizeof(struct direntry) || 1458 (offset & (sizeof(struct direntry) - 1))) 1459 return (EINVAL); 1460 lost = uio->uio_resid - count; 1461 uio->uio_resid = count; 1462 uio_off = uio->uio_offset; 1463 1464 if (ap->a_ncookies) { 1465 nc = uio->uio_resid / 16; 1466 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1467 *ap->a_cookies = cookies; 1468 } 1469 1470 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1471 1472 /* 1473 * If they are reading from the root directory then, we simulate 1474 * the . and .. entries since these don't exist in the root 1475 * directory. We also set the offset bias to make up for having to 1476 * simulate these entries. By this I mean that at file offset 64 we 1477 * read the first entry in the root directory that lives on disk. 1478 */ 1479 if (dep->de_StartCluster == MSDOSFSROOT 1480 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1481 #if 0 1482 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1483 offset); 1484 #endif 1485 bias = 2 * sizeof(struct direntry); 1486 if (offset < bias) { 1487 for (n = (int)offset / sizeof(struct direntry); 1488 n < 2; n++) { 1489 if (FAT32(pmp)) 1490 dirbuf.d_fileno = cntobn(pmp, 1491 (ino_t)pmp->pm_rootdirblk) 1492 * dirsperblk; 1493 else 1494 dirbuf.d_fileno = 1; 1495 dirbuf.d_type = DT_DIR; 1496 switch (n) { 1497 case 0: 1498 dirbuf.d_namlen = 1; 1499 strlcpy(dirbuf.d_name, ".", 1500 sizeof(dirbuf.d_name)); 1501 break; 1502 case 1: 1503 dirbuf.d_namlen = 2; 1504 strlcpy(dirbuf.d_name, "..", 1505 sizeof(dirbuf.d_name)); 1506 break; 1507 } 1508 dirbuf.d_reclen = _DIRENT_SIZE(&dirbuf); 1509 if (uio->uio_resid < dirbuf.d_reclen) 1510 goto out; 1511 error = uiomove(&dirbuf, 1512 dirbuf.d_reclen, uio); 1513 if (error) 1514 goto out; 1515 offset += sizeof(struct direntry); 1516 uio_off = offset; 1517 if (cookies) { 1518 *cookies++ = offset; 1519 ncookies++; 1520 if (ncookies >= nc) 1521 goto out; 1522 } 1523 } 1524 } 1525 } 1526 1527 while (uio->uio_resid > 0) { 1528 lbn = de_cluster(pmp, offset - bias); 1529 on = (offset - bias) & pmp->pm_crbomask; 1530 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1531 diff = dep->de_FileSize - (offset - bias); 1532 if (diff <= 0) 1533 break; 1534 n = MIN(n, diff); 1535 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1536 break; 1537 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1538 if (error) { 1539 brelse(bp); 1540 return (error); 1541 } 1542 n = MIN(n, blsize - bp->b_resid); 1543 1544 /* 1545 * Convert from dos directory entries to fs-independent 1546 * directory entries. 1547 */ 1548 for (dentp = (struct direntry *)(bp->b_data + on); 1549 (char *)dentp < bp->b_data + on + n; 1550 dentp++, offset += sizeof(struct direntry)) { 1551 #if 0 1552 1553 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1554 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1555 #endif 1556 /* 1557 * If this is an unused entry, we can stop. 1558 */ 1559 if (dentp->deName[0] == SLOT_EMPTY) { 1560 brelse(bp); 1561 goto out; 1562 } 1563 /* 1564 * Skip deleted entries. 1565 */ 1566 if (dentp->deName[0] == SLOT_DELETED) { 1567 chksum = -1; 1568 continue; 1569 } 1570 1571 /* 1572 * Handle Win95 long directory entries 1573 */ 1574 if (dentp->deAttributes == ATTR_WIN95) { 1575 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1576 continue; 1577 chksum = win2unixfn((struct winentry *)dentp, &dirbuf, chksum); 1578 continue; 1579 } 1580 1581 /* 1582 * Skip volume labels 1583 */ 1584 if (dentp->deAttributes & ATTR_VOLUME) { 1585 chksum = -1; 1586 continue; 1587 } 1588 /* 1589 * This computation of d_fileno must match 1590 * the computation of va_fileid in 1591 * msdosfs_getattr. 1592 */ 1593 if (dentp->deAttributes & ATTR_DIRECTORY) { 1594 fileno = getushort(dentp->deStartCluster); 1595 if (FAT32(pmp)) 1596 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1597 /* if this is the root directory */ 1598 if (fileno == MSDOSFSROOT) 1599 if (FAT32(pmp)) 1600 fileno = cntobn(pmp, 1601 (ino_t)pmp->pm_rootdirblk) 1602 * dirsperblk; 1603 else 1604 fileno = 1; 1605 else 1606 fileno = cntobn(pmp, fileno) * dirsperblk; 1607 dirbuf.d_fileno = fileno; 1608 dirbuf.d_type = DT_DIR; 1609 } else { 1610 dirbuf.d_fileno = offset / sizeof(struct direntry); 1611 dirbuf.d_type = DT_REG; 1612 } 1613 if (chksum != winChksum(dentp->deName)) 1614 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1615 (u_char *)dirbuf.d_name, 1616 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1617 else 1618 dirbuf.d_name[dirbuf.d_namlen] = 0; 1619 chksum = -1; 1620 dirbuf.d_reclen = _DIRENT_SIZE(&dirbuf); 1621 if (uio->uio_resid < dirbuf.d_reclen) { 1622 brelse(bp); 1623 goto out; 1624 } 1625 error = uiomove(&dirbuf, 1626 dirbuf.d_reclen, uio); 1627 if (error) { 1628 brelse(bp); 1629 goto out; 1630 } 1631 uio_off = offset + sizeof(struct direntry); 1632 if (cookies) { 1633 *cookies++ = offset + sizeof(struct direntry); 1634 ncookies++; 1635 if (ncookies >= nc) { 1636 brelse(bp); 1637 goto out; 1638 } 1639 } 1640 } 1641 brelse(bp); 1642 } 1643 1644 out: 1645 uio->uio_offset = uio_off; 1646 uio->uio_resid += lost; 1647 if (dep->de_FileSize - (offset - bias) <= 0) 1648 *ap->a_eofflag = 1; 1649 else 1650 *ap->a_eofflag = 0; 1651 1652 if (ap->a_ncookies) { 1653 if (error) { 1654 free(*ap->a_cookies, M_TEMP); 1655 *ap->a_ncookies = 0; 1656 *ap->a_cookies = NULL; 1657 } else 1658 *ap->a_ncookies = ncookies; 1659 } 1660 return (error); 1661 } 1662 1663 /* 1664 * DOS filesystems don't know what symlinks are. 1665 */ 1666 int 1667 msdosfs_readlink(void *v __unused) 1668 { 1669 #if 0 1670 struct vop_readlink_args /* { 1671 struct vnode *a_vp; 1672 struct uio *a_uio; 1673 kauth_cred_t a_cred; 1674 } */ *ap; 1675 #endif 1676 1677 return (EINVAL); 1678 } 1679 1680 /* 1681 * vp - address of vnode file the file 1682 * bn - which cluster we are interested in mapping to a filesystem block number. 1683 * vpp - returns the vnode for the block special file holding the filesystem 1684 * containing the file of interest 1685 * bnp - address of where to return the filesystem relative block number 1686 */ 1687 int 1688 msdosfs_bmap(v) 1689 void *v; 1690 { 1691 struct vop_bmap_args /* { 1692 struct vnode *a_vp; 1693 daddr_t a_bn; 1694 struct vnode **a_vpp; 1695 daddr_t *a_bnp; 1696 int *a_runp; 1697 } */ *ap = v; 1698 struct denode *dep = VTODE(ap->a_vp); 1699 1700 if (ap->a_vpp != NULL) 1701 *ap->a_vpp = dep->de_devvp; 1702 if (ap->a_bnp == NULL) 1703 return (0); 1704 if (ap->a_runp) { 1705 /* 1706 * Sequential clusters should be counted here. 1707 */ 1708 *ap->a_runp = 0; 1709 } 1710 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1711 } 1712 1713 int 1714 msdosfs_strategy(v) 1715 void *v; 1716 { 1717 struct vop_strategy_args /* { 1718 struct vnode *a_vp; 1719 struct buf *a_bp; 1720 } */ *ap = v; 1721 struct vnode *vp = ap->a_vp; 1722 struct buf *bp = ap->a_bp; 1723 struct denode *dep = VTODE(bp->b_vp); 1724 int error = 0; 1725 1726 if (vp->v_type == VBLK || vp->v_type == VCHR) 1727 panic("msdosfs_strategy: spec"); 1728 /* 1729 * If we don't already know the filesystem relative block number 1730 * then get it using pcbmap(). If pcbmap() returns the block 1731 * number as -1 then we've got a hole in the file. DOS filesystems 1732 * don't allow files with holes, so we shouldn't ever see this. 1733 */ 1734 if (bp->b_blkno == bp->b_lblkno) { 1735 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1736 &bp->b_blkno, 0, 0); 1737 if (error) 1738 bp->b_blkno = -1; 1739 if (bp->b_blkno == -1) 1740 clrbuf(bp); 1741 } 1742 if (bp->b_blkno == -1) { 1743 biodone(bp); 1744 return (error); 1745 } 1746 1747 /* 1748 * Read/write the block from/to the disk that contains the desired 1749 * file block. 1750 */ 1751 1752 vp = dep->de_devvp; 1753 return (VOP_STRATEGY(vp, bp)); 1754 } 1755 1756 int 1757 msdosfs_print(v) 1758 void *v; 1759 { 1760 struct vop_print_args /* { 1761 struct vnode *vp; 1762 } */ *ap = v; 1763 struct denode *dep = VTODE(ap->a_vp); 1764 1765 printf( 1766 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1767 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1768 printf(" dev %d, %d ", major(dep->de_dev), minor(dep->de_dev)); 1769 lockmgr_printinfo(&ap->a_vp->v_lock); 1770 printf("\n"); 1771 return (0); 1772 } 1773 1774 int 1775 msdosfs_advlock(v) 1776 void *v; 1777 { 1778 struct vop_advlock_args /* { 1779 struct vnode *a_vp; 1780 void *a_id; 1781 int a_op; 1782 struct flock *a_fl; 1783 int a_flags; 1784 } */ *ap = v; 1785 struct denode *dep = VTODE(ap->a_vp); 1786 1787 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1788 } 1789 1790 int 1791 msdosfs_pathconf(v) 1792 void *v; 1793 { 1794 struct vop_pathconf_args /* { 1795 struct vnode *a_vp; 1796 int a_name; 1797 register_t *a_retval; 1798 } */ *ap = v; 1799 1800 switch (ap->a_name) { 1801 case _PC_LINK_MAX: 1802 *ap->a_retval = 1; 1803 return (0); 1804 case _PC_NAME_MAX: 1805 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1806 return (0); 1807 case _PC_PATH_MAX: 1808 *ap->a_retval = PATH_MAX; 1809 return (0); 1810 case _PC_CHOWN_RESTRICTED: 1811 *ap->a_retval = 1; 1812 return (0); 1813 case _PC_NO_TRUNC: 1814 *ap->a_retval = 0; 1815 return (0); 1816 case _PC_SYNC_IO: 1817 *ap->a_retval = 1; 1818 return (0); 1819 case _PC_FILESIZEBITS: 1820 *ap->a_retval = 32; 1821 return (0); 1822 default: 1823 return (EINVAL); 1824 } 1825 /* NOTREACHED */ 1826 } 1827 1828 int 1829 msdosfs_fsync(v) 1830 void *v; 1831 { 1832 struct vop_fsync_args /* { 1833 struct vnode *a_vp; 1834 kauth_cred_t a_cred; 1835 int a_flags; 1836 off_t offlo; 1837 off_t offhi; 1838 struct lwp *a_l; 1839 } */ *ap = v; 1840 struct vnode *vp = ap->a_vp; 1841 int wait; 1842 int error; 1843 1844 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1845 vflushbuf(vp, wait); 1846 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 1847 error = 0; 1848 else 1849 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1850 1851 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1852 struct denode *dep = VTODE(vp); 1853 struct vnode *devvp = dep->de_devvp; 1854 1855 int l = 0; 1856 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1857 ap->a_l->l_cred, ap->a_l); 1858 } 1859 1860 return (error); 1861 } 1862 1863 void 1864 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1865 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1866 { 1867 struct timespec *ts = NULL, tsb; 1868 1869 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1870 /* XXX just call getnanotime early and use result if needed? */ 1871 dep->de_flag |= DE_MODIFIED; 1872 if (dep->de_flag & DE_UPDATE) { 1873 if (mod == NULL) { 1874 getnanotime(&tsb); 1875 mod = ts = &tsb; 1876 } 1877 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1878 dep->de_Attributes |= ATTR_ARCHIVE; 1879 } 1880 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1881 if (dep->de_flag & DE_ACCESS) { 1882 if (acc == NULL) 1883 acc = ts == NULL ? 1884 (getnanotime(&tsb), ts = &tsb) : ts; 1885 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1886 } 1887 if (dep->de_flag & DE_CREATE) { 1888 if (cre == NULL) 1889 cre = ts == NULL ? 1890 (getnanotime(&tsb), ts = &tsb) : ts; 1891 unix2dostime(cre, gmtoff, &dep->de_CDate, 1892 &dep->de_CTime, &dep->de_CHun); 1893 } 1894 } 1895 1896 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1897 } 1898 1899 /* Global vfs data structures for msdosfs */ 1900 int (**msdosfs_vnodeop_p)(void *); 1901 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1902 { &vop_default_desc, vn_default_error }, 1903 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1904 { &vop_create_desc, msdosfs_create }, /* create */ 1905 { &vop_mknod_desc, msdosfs_mknod }, /* mknod */ 1906 { &vop_open_desc, msdosfs_open }, /* open */ 1907 { &vop_close_desc, msdosfs_close }, /* close */ 1908 { &vop_access_desc, msdosfs_access }, /* access */ 1909 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1910 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1911 { &vop_read_desc, msdosfs_read }, /* read */ 1912 { &vop_write_desc, msdosfs_write }, /* write */ 1913 { &vop_lease_desc, msdosfs_lease_check }, /* lease */ 1914 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1915 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1916 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1917 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1918 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1919 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1920 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1921 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1922 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1923 { &vop_link_desc, msdosfs_link }, /* link */ 1924 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1925 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1926 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1927 { &vop_symlink_desc, msdosfs_symlink }, /* symlink */ 1928 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1929 { &vop_readlink_desc, msdosfs_readlink }, /* readlink */ 1930 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1931 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1932 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1933 { &vop_lock_desc, genfs_lock }, /* lock */ 1934 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1935 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1936 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1937 { &vop_print_desc, msdosfs_print }, /* print */ 1938 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1939 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1940 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1941 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1942 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1943 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1944 { NULL, NULL } 1945 }; 1946 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1947 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1948