1 /* $NetBSD: msdosfs_vnops.c,v 1.58 2009/03/14 21:04:23 dsl 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 1.58 2009/03/14 21:04:23 dsl 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(void *v) 107 { 108 struct vop_create_args /* { 109 struct vnode *a_dvp; 110 struct vnode **a_vpp; 111 struct componentname *a_cnp; 112 struct vattr *a_vap; 113 } */ *ap = v; 114 struct componentname *cnp = ap->a_cnp; 115 struct denode ndirent; 116 struct denode *dep; 117 struct denode *pdep = VTODE(ap->a_dvp); 118 int error; 119 120 #ifdef MSDOSFS_DEBUG 121 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 122 #endif 123 124 /* 125 * If this is the root directory and there is no space left we 126 * can't do anything. This is because the root directory can not 127 * change size. 128 */ 129 if (pdep->de_StartCluster == MSDOSFSROOT 130 && pdep->de_fndoffset >= pdep->de_FileSize) { 131 error = ENOSPC; 132 goto bad; 133 } 134 135 /* 136 * Create a directory entry for the file, then call createde() to 137 * have it installed. NOTE: DOS files are always executable. We 138 * use the absence of the owner write bit to make the file 139 * readonly. 140 */ 141 #ifdef DIAGNOSTIC 142 if ((cnp->cn_flags & HASBUF) == 0) 143 panic("msdosfs_create: no name"); 144 #endif 145 memset(&ndirent, 0, sizeof(ndirent)); 146 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 147 goto bad; 148 149 ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ? 150 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 151 ndirent.de_StartCluster = 0; 152 ndirent.de_FileSize = 0; 153 ndirent.de_dev = pdep->de_dev; 154 ndirent.de_devvp = pdep->de_devvp; 155 ndirent.de_pmp = pdep->de_pmp; 156 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 157 DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff); 158 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 159 goto bad; 160 if ((cnp->cn_flags & SAVESTART) == 0) 161 PNBUF_PUT(cnp->cn_pnbuf); 162 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 163 vput(ap->a_dvp); 164 *ap->a_vpp = DETOV(dep); 165 return (0); 166 167 bad: 168 PNBUF_PUT(cnp->cn_pnbuf); 169 vput(ap->a_dvp); 170 return (error); 171 } 172 173 int 174 msdosfs_mknod(void *v) 175 { 176 struct vop_mknod_args /* { 177 struct vnode *a_dvp; 178 struct vnode **a_vpp; 179 struct componentname *a_cnp; 180 struct vattr *a_vap; 181 } */ *ap = v; 182 183 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 184 vput(ap->a_dvp); 185 return (EINVAL); 186 } 187 188 int 189 msdosfs_open(void *v) 190 { 191 #if 0 192 struct vop_open_args /* { 193 struct vnode *a_vp; 194 int a_mode; 195 kauth_cred_t a_cred; 196 } */ *ap; 197 #endif 198 199 return (0); 200 } 201 202 int 203 msdosfs_close(void *v) 204 { 205 struct vop_close_args /* { 206 struct vnode *a_vp; 207 int a_fflag; 208 kauth_cred_t a_cred; 209 } */ *ap = v; 210 struct vnode *vp = ap->a_vp; 211 struct denode *dep = VTODE(vp); 212 213 mutex_enter(&vp->v_interlock); 214 if (vp->v_usecount > 1) 215 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 216 mutex_exit(&vp->v_interlock); 217 return (0); 218 } 219 220 int 221 msdosfs_access(void *v) 222 { 223 struct vop_access_args /* { 224 struct vnode *a_vp; 225 int a_mode; 226 kauth_cred_t a_cred; 227 } */ *ap = v; 228 struct vnode *vp = ap->a_vp; 229 struct denode *dep = VTODE(vp); 230 struct msdosfsmount *pmp = dep->de_pmp; 231 mode_t mode = ap->a_mode; 232 233 /* 234 * Disallow write attempts on read-only file systems; 235 * unless the file is a socket, fifo, or a block or 236 * character device resident on the file system. 237 */ 238 if (mode & VWRITE) { 239 switch (vp->v_type) { 240 case VDIR: 241 case VLNK: 242 case VREG: 243 if (vp->v_mount->mnt_flag & MNT_RDONLY) 244 return (EROFS); 245 default: 246 break; 247 } 248 } 249 250 if ((dep->de_Attributes & ATTR_READONLY) == 0) 251 mode = S_IRWXU|S_IRWXG|S_IRWXO; 252 else 253 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 254 return (vaccess(ap->a_vp->v_type, 255 mode & (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask), 256 pmp->pm_uid, pmp->pm_gid, ap->a_mode, ap->a_cred)); 257 } 258 259 int 260 msdosfs_getattr(void *v) 261 { 262 struct vop_getattr_args /* { 263 struct vnode *a_vp; 264 struct vattr *a_vap; 265 kauth_cred_t a_cred; 266 } */ *ap = v; 267 struct denode *dep = VTODE(ap->a_vp); 268 struct msdosfsmount *pmp = dep->de_pmp; 269 struct vattr *vap = ap->a_vap; 270 mode_t mode; 271 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 272 ino_t fileid; 273 274 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 275 vap->va_fsid = dep->de_dev; 276 /* 277 * The following computation of the fileid must be the same as that 278 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 279 * doesn't work. 280 */ 281 if (dep->de_Attributes & ATTR_DIRECTORY) { 282 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 283 if (dep->de_StartCluster == MSDOSFSROOT) 284 fileid = 1; 285 } else { 286 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 287 if (dep->de_dirclust == MSDOSFSROOT) 288 fileid = roottobn(pmp, 0) * dirsperblk; 289 fileid += dep->de_diroffset / sizeof(struct direntry); 290 } 291 vap->va_fileid = fileid; 292 if ((dep->de_Attributes & ATTR_READONLY) == 0) 293 mode = S_IRWXU|S_IRWXG|S_IRWXO; 294 else 295 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 296 vap->va_mode = 297 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 298 vap->va_uid = pmp->pm_uid; 299 vap->va_gid = pmp->pm_gid; 300 vap->va_nlink = 1; 301 vap->va_rdev = 0; 302 vap->va_size = ap->a_vp->v_size; 303 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 304 &vap->va_mtime); 305 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 306 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 307 &vap->va_atime); 308 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 309 pmp->pm_gmtoff, &vap->va_ctime); 310 } else { 311 vap->va_atime = vap->va_mtime; 312 vap->va_ctime = vap->va_mtime; 313 } 314 vap->va_flags = 0; 315 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 316 vap->va_mode |= S_ARCH1; 317 vap->va_gen = 0; 318 vap->va_blocksize = pmp->pm_bpcluster; 319 vap->va_bytes = 320 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 321 vap->va_type = ap->a_vp->v_type; 322 return (0); 323 } 324 325 int 326 msdosfs_setattr(void *v) 327 { 328 struct vop_setattr_args /* { 329 struct vnode *a_vp; 330 struct vattr *a_vap; 331 kauth_cred_t a_cred; 332 } */ *ap = v; 333 int error = 0, de_changed = 0; 334 struct denode *dep = VTODE(ap->a_vp); 335 struct msdosfsmount *pmp = dep->de_pmp; 336 struct vnode *vp = ap->a_vp; 337 struct vattr *vap = ap->a_vap; 338 kauth_cred_t cred = ap->a_cred; 339 340 #ifdef MSDOSFS_DEBUG 341 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 342 ap->a_vp, vap, cred); 343 #endif 344 /* 345 * Note we silently ignore uid or gid changes. 346 */ 347 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 348 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 349 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 350 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 351 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 352 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 353 #ifdef MSDOSFS_DEBUG 354 printf("msdosfs_setattr(): returning EINVAL\n"); 355 printf(" va_type %d, va_nlink %x, va_fsid %"PRIx64", va_fileid %llx\n", 356 vap->va_type, vap->va_nlink, vap->va_fsid, 357 (unsigned long long)vap->va_fileid); 358 printf(" va_blocksize %lx, va_rdev %"PRIx64", va_bytes %"PRIx64", va_gen %lx\n", 359 vap->va_blocksize, vap->va_rdev, (long long)vap->va_bytes, vap->va_gen); 360 #endif 361 return (EINVAL); 362 } 363 /* 364 * Silently ignore attributes modifications on directories. 365 */ 366 if (ap->a_vp->v_type == VDIR) 367 return 0; 368 369 if (vap->va_size != VNOVAL) { 370 if (vp->v_mount->mnt_flag & MNT_RDONLY) 371 return (EROFS); 372 error = detrunc(dep, (u_long)vap->va_size, 0, cred); 373 if (error) 374 return (error); 375 de_changed = 1; 376 } 377 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 378 if (vp->v_mount->mnt_flag & MNT_RDONLY) 379 return (EROFS); 380 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 381 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 382 NULL)) && 383 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 384 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred)))) 385 return (error); 386 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 387 vap->va_atime.tv_sec != VNOVAL) 388 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 389 if (vap->va_mtime.tv_sec != VNOVAL) 390 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 391 dep->de_Attributes |= ATTR_ARCHIVE; 392 dep->de_flag |= DE_MODIFIED; 393 de_changed = 1; 394 } 395 /* 396 * DOS files only have the ability to have their writability 397 * attribute set, so we use the owner write bit to set the readonly 398 * attribute. 399 */ 400 if (vap->va_mode != (mode_t)VNOVAL) { 401 if (vp->v_mount->mnt_flag & MNT_RDONLY) 402 return (EROFS); 403 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 404 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 405 NULL))) 406 return (error); 407 /* We ignore the read and execute bits. */ 408 if (vap->va_mode & S_IWUSR) 409 dep->de_Attributes &= ~ATTR_READONLY; 410 else 411 dep->de_Attributes |= ATTR_READONLY; 412 dep->de_flag |= DE_MODIFIED; 413 de_changed = 1; 414 } 415 /* 416 * Allow the `archived' bit to be toggled. 417 */ 418 if (vap->va_flags != VNOVAL) { 419 if (vp->v_mount->mnt_flag & MNT_RDONLY) 420 return (EROFS); 421 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 422 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 423 NULL))) 424 return (error); 425 if (vap->va_flags & SF_ARCHIVED) 426 dep->de_Attributes &= ~ATTR_ARCHIVE; 427 else 428 dep->de_Attributes |= ATTR_ARCHIVE; 429 dep->de_flag |= DE_MODIFIED; 430 de_changed = 1; 431 } 432 433 if (de_changed) { 434 VN_KNOTE(vp, NOTE_ATTRIB); 435 return (deupdat(dep, 1)); 436 } else 437 return (0); 438 } 439 440 int 441 msdosfs_read(void *v) 442 { 443 struct vop_read_args /* { 444 struct vnode *a_vp; 445 struct uio *a_uio; 446 int a_ioflag; 447 kauth_cred_t a_cred; 448 } */ *ap = v; 449 int error = 0; 450 int64_t diff; 451 int blsize; 452 long n; 453 long on; 454 daddr_t lbn; 455 vsize_t bytelen; 456 struct buf *bp; 457 struct vnode *vp = ap->a_vp; 458 struct denode *dep = VTODE(vp); 459 struct msdosfsmount *pmp = dep->de_pmp; 460 struct uio *uio = ap->a_uio; 461 462 /* 463 * If they didn't ask for any data, then we are done. 464 */ 465 466 if (uio->uio_resid == 0) 467 return (0); 468 if (uio->uio_offset < 0) 469 return (EINVAL); 470 if (uio->uio_offset >= dep->de_FileSize) 471 return (0); 472 473 if (vp->v_type == VREG) { 474 const int advice = IO_ADV_DECODE(ap->a_ioflag); 475 476 while (uio->uio_resid > 0) { 477 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 478 uio->uio_resid); 479 480 if (bytelen == 0) 481 break; 482 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 483 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 484 if (error) 485 break; 486 } 487 dep->de_flag |= DE_ACCESS; 488 goto out; 489 } 490 491 /* this loop is only for directories now */ 492 do { 493 lbn = de_cluster(pmp, uio->uio_offset); 494 on = uio->uio_offset & pmp->pm_crbomask; 495 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 496 if (uio->uio_offset >= dep->de_FileSize) 497 return (0); 498 /* file size (and hence diff) may be up to 4GB */ 499 diff = dep->de_FileSize - uio->uio_offset; 500 if (diff < n) 501 n = (long) diff; 502 503 /* convert cluster # to sector # */ 504 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 505 if (error) 506 return (error); 507 508 /* 509 * If we are operating on a directory file then be sure to 510 * do i/o with the vnode for the filesystem instead of the 511 * vnode for the directory. 512 */ 513 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 514 NOCRED, 0, &bp); 515 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 516 if (error) { 517 brelse(bp, 0); 518 return (error); 519 } 520 error = uiomove((char *)bp->b_data + on, (int) n, uio); 521 brelse(bp, 0); 522 } while (error == 0 && uio->uio_resid > 0 && n != 0); 523 524 out: 525 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 526 error = deupdat(dep, 1); 527 return (error); 528 } 529 530 /* 531 * Write data to a file or directory. 532 */ 533 int 534 msdosfs_write(void *v) 535 { 536 struct vop_write_args /* { 537 struct vnode *a_vp; 538 struct uio *a_uio; 539 int a_ioflag; 540 kauth_cred_t a_cred; 541 } */ *ap = v; 542 int resid, extended = 0; 543 int error = 0; 544 int ioflag = ap->a_ioflag; 545 u_long osize; 546 u_long count; 547 vsize_t bytelen; 548 off_t oldoff; 549 struct uio *uio = ap->a_uio; 550 struct proc *p = curproc; 551 struct vnode *vp = ap->a_vp; 552 struct denode *dep = VTODE(vp); 553 struct msdosfsmount *pmp = dep->de_pmp; 554 kauth_cred_t cred = ap->a_cred; 555 bool async; 556 557 #ifdef MSDOSFS_DEBUG 558 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 559 vp, uio, ioflag, cred); 560 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 561 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 562 #endif 563 564 switch (vp->v_type) { 565 case VREG: 566 if (ioflag & IO_APPEND) 567 uio->uio_offset = dep->de_FileSize; 568 break; 569 case VDIR: 570 return EISDIR; 571 default: 572 panic("msdosfs_write(): bad file type"); 573 } 574 575 if (uio->uio_offset < 0) 576 return (EINVAL); 577 578 if (uio->uio_resid == 0) 579 return (0); 580 581 /* Don't bother to try to write files larger than the fs limit */ 582 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 583 return (EFBIG); 584 585 /* 586 * If they've exceeded their filesize limit, tell them about it. 587 */ 588 if (((uio->uio_offset + uio->uio_resid) > 589 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 590 mutex_enter(proc_lock); 591 psignal(p, SIGXFSZ); 592 mutex_exit(proc_lock); 593 return (EFBIG); 594 } 595 596 /* 597 * If the offset we are starting the write at is beyond the end of 598 * the file, then they've done a seek. Unix filesystems allow 599 * files with holes in them, DOS doesn't so we must fill the hole 600 * with zeroed blocks. 601 */ 602 if (uio->uio_offset > dep->de_FileSize) { 603 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) 604 return (error); 605 } 606 607 /* 608 * Remember some values in case the write fails. 609 */ 610 async = vp->v_mount->mnt_flag & MNT_ASYNC; 611 resid = uio->uio_resid; 612 osize = dep->de_FileSize; 613 614 /* 615 * If we write beyond the end of the file, extend it to its ultimate 616 * size ahead of the time to hopefully get a contiguous area. 617 */ 618 if (uio->uio_offset + resid > osize) { 619 count = de_clcount(pmp, uio->uio_offset + resid) - 620 de_clcount(pmp, osize); 621 if ((error = extendfile(dep, count, NULL, NULL, 0))) 622 goto errexit; 623 624 dep->de_FileSize = uio->uio_offset + resid; 625 /* hint uvm to not read in extended part */ 626 uvm_vnp_setwritesize(vp, dep->de_FileSize); 627 extended = 1; 628 } 629 630 do { 631 oldoff = uio->uio_offset; 632 bytelen = uio->uio_resid; 633 634 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 635 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 636 if (error) 637 break; 638 639 /* 640 * flush what we just wrote if necessary. 641 * XXXUBC simplistic async flushing. 642 */ 643 644 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 645 mutex_enter(&vp->v_interlock); 646 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 647 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 648 } 649 } while (error == 0 && uio->uio_resid > 0); 650 651 /* set final size */ 652 uvm_vnp_setsize(vp, dep->de_FileSize); 653 if (error == 0 && ioflag & IO_SYNC) { 654 mutex_enter(&vp->v_interlock); 655 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 656 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 657 } 658 dep->de_flag |= DE_UPDATE; 659 660 /* 661 * If the write failed and they want us to, truncate the file back 662 * to the size it was before the write was attempted. 663 */ 664 errexit: 665 if (resid > uio->uio_resid) 666 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 667 if (error) { 668 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 669 uio->uio_offset -= resid - uio->uio_resid; 670 uio->uio_resid = resid; 671 } else if ((ioflag & IO_SYNC) == IO_SYNC) 672 error = deupdat(dep, 1); 673 KASSERT(vp->v_size == dep->de_FileSize); 674 return (error); 675 } 676 677 int 678 msdosfs_update(struct vnode *vp, const struct timespec *acc, 679 const struct timespec *mod, int flags) 680 { 681 struct buf *bp; 682 struct direntry *dirp; 683 struct denode *dep; 684 int error; 685 686 if (vp->v_mount->mnt_flag & MNT_RDONLY) 687 return (0); 688 dep = VTODE(vp); 689 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 690 if ((dep->de_flag & DE_MODIFIED) == 0) 691 return (0); 692 dep->de_flag &= ~DE_MODIFIED; 693 if (dep->de_Attributes & ATTR_DIRECTORY) 694 return (0); 695 if (dep->de_refcnt <= 0) 696 return (0); 697 error = readde(dep, &bp, &dirp); 698 if (error) 699 return (error); 700 DE_EXTERNALIZE(dirp, dep); 701 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 702 return (bwrite(bp)); 703 else { 704 bdwrite(bp); 705 return (0); 706 } 707 } 708 709 /* 710 * Flush the blocks of a file to disk. 711 * 712 * This function is worthless for vnodes that represent directories. Maybe we 713 * could just do a sync if they try an fsync on a directory file. 714 */ 715 int 716 msdosfs_remove(void *v) 717 { 718 struct vop_remove_args /* { 719 struct vnode *a_dvp; 720 struct vnode *a_vp; 721 struct componentname *a_cnp; 722 } */ *ap = v; 723 struct denode *dep = VTODE(ap->a_vp); 724 struct denode *ddep = VTODE(ap->a_dvp); 725 int error; 726 727 if (ap->a_vp->v_type == VDIR) 728 error = EPERM; 729 else 730 error = removede(ddep, dep); 731 #ifdef MSDOSFS_DEBUG 732 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 733 dep, ap->a_vp->v_usecount); 734 #endif 735 VN_KNOTE(ap->a_vp, NOTE_DELETE); 736 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 737 if (ddep == dep) 738 vrele(ap->a_vp); 739 else 740 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 741 * via vrele() */ 742 vput(ap->a_dvp); 743 return (error); 744 } 745 746 /* 747 * DOS filesystems don't know what links are. But since we already called 748 * msdosfs_lookup() with create and lockparent, the parent is locked so we 749 * have to free it before we return the error. 750 */ 751 int 752 msdosfs_link(void *v) 753 { 754 struct vop_link_args /* { 755 struct vnode *a_dvp; 756 struct vnode *a_vp; 757 struct componentname *a_cnp; 758 } */ *ap = v; 759 760 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 761 vput(ap->a_dvp); 762 return (EOPNOTSUPP); 763 } 764 765 /* 766 * Renames on files require moving the denode to a new hash queue since the 767 * denode's location is used to compute which hash queue to put the file 768 * in. Unless it is a rename in place. For example "mv a b". 769 * 770 * What follows is the basic algorithm: 771 * 772 * if (file move) { 773 * if (dest file exists) { 774 * remove dest file 775 * } 776 * if (dest and src in same directory) { 777 * rewrite name in existing directory slot 778 * } else { 779 * write new entry in dest directory 780 * update offset and dirclust in denode 781 * move denode to new hash chain 782 * clear old directory entry 783 * } 784 * } else { 785 * directory move 786 * if (dest directory exists) { 787 * if (dest is not empty) { 788 * return ENOTEMPTY 789 * } 790 * remove dest directory 791 * } 792 * if (dest and src in same directory) { 793 * rewrite name in existing entry 794 * } else { 795 * be sure dest is not a child of src directory 796 * write entry in dest directory 797 * update "." and ".." in moved directory 798 * update offset and dirclust in denode 799 * move denode to new hash chain 800 * clear old directory entry for moved directory 801 * } 802 * } 803 * 804 * On entry: 805 * source's parent directory is unlocked 806 * source file or directory is unlocked 807 * destination's parent directory is locked 808 * destination file or directory is locked if it exists 809 * 810 * On exit: 811 * all denodes should be released 812 * 813 * Notes: 814 * I'm not sure how the memory containing the pathnames pointed at by the 815 * componentname structures is freed, there may be some memory bleeding 816 * for each rename done. 817 * 818 * --More-- Notes: 819 * This routine needs help. badly. 820 */ 821 int 822 msdosfs_rename(void *v) 823 { 824 struct vop_rename_args /* { 825 struct vnode *a_fdvp; 826 struct vnode *a_fvp; 827 struct componentname *a_fcnp; 828 struct vnode *a_tdvp; 829 struct vnode *a_tvp; 830 struct componentname *a_tcnp; 831 } */ *ap = v; 832 struct vnode *tvp = ap->a_tvp; 833 struct vnode *tdvp = ap->a_tdvp; 834 struct vnode *fvp = ap->a_fvp; 835 struct vnode *fdvp = ap->a_fdvp; 836 struct componentname *tcnp = ap->a_tcnp; 837 struct componentname *fcnp = ap->a_fcnp; 838 struct denode *ip, *xp, *dp, *zp; 839 u_char toname[11], oldname[11]; 840 u_long from_diroffset, to_diroffset; 841 u_char to_count; 842 int doingdirectory = 0, newparent = 0; 843 int error; 844 u_long cn; 845 daddr_t bn; 846 struct msdosfsmount *pmp; 847 struct direntry *dotdotp; 848 struct buf *bp; 849 int fdvp_dorele = 0; 850 851 pmp = VFSTOMSDOSFS(fdvp->v_mount); 852 853 #ifdef DIAGNOSTIC 854 if ((tcnp->cn_flags & HASBUF) == 0 || 855 (fcnp->cn_flags & HASBUF) == 0) 856 panic("msdosfs_rename: no name"); 857 #endif 858 /* 859 * Check for cross-device rename. 860 */ 861 if ((fvp->v_mount != tdvp->v_mount) || 862 (tvp && (fvp->v_mount != tvp->v_mount))) { 863 error = EXDEV; 864 abortit: 865 VOP_ABORTOP(tdvp, tcnp); 866 if (tdvp == tvp) 867 vrele(tdvp); 868 else 869 vput(tdvp); 870 if (tvp) 871 vput(tvp); 872 VOP_ABORTOP(fdvp, fcnp); 873 vrele(fdvp); 874 vrele(fvp); 875 return (error); 876 } 877 878 /* 879 * If source and dest are the same, do nothing. 880 */ 881 if (tvp == fvp) { 882 error = 0; 883 goto abortit; 884 } 885 886 /* 887 * XXX: This can deadlock since we hold tdvp/tvp locked. 888 * But I'm not going to fix it now. 889 */ 890 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 891 goto abortit; 892 dp = VTODE(fdvp); 893 ip = VTODE(fvp); 894 895 /* 896 * Be sure we are not renaming ".", "..", or an alias of ".". This 897 * leads to a crippled directory tree. It's pretty tough to do a 898 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 899 * doesn't work if the ".." entry is missing. 900 */ 901 if (ip->de_Attributes & ATTR_DIRECTORY) { 902 /* 903 * Avoid ".", "..", and aliases of "." for obvious reasons. 904 */ 905 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 906 dp == ip || 907 (fcnp->cn_flags & ISDOTDOT) || 908 (tcnp->cn_flags & ISDOTDOT) || 909 (ip->de_flag & DE_RENAME)) { 910 VOP_UNLOCK(fvp, 0); 911 error = EINVAL; 912 goto abortit; 913 } 914 ip->de_flag |= DE_RENAME; 915 doingdirectory++; 916 } 917 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 918 919 /* 920 * When the target exists, both the directory 921 * and target vnodes are returned locked. 922 */ 923 dp = VTODE(tdvp); 924 xp = tvp ? VTODE(tvp) : NULL; 925 /* 926 * Remember direntry place to use for destination 927 */ 928 to_diroffset = dp->de_fndoffset; 929 to_count = dp->de_fndcnt; 930 931 /* 932 * If ".." must be changed (ie the directory gets a new 933 * parent) then the source directory must not be in the 934 * directory hierarchy above the target, as this would 935 * orphan everything below the source directory. Also 936 * the user must have write permission in the source so 937 * as to be able to change "..". We must repeat the call 938 * to namei, as the parent directory is unlocked by the 939 * call to doscheckpath(). 940 */ 941 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 942 VOP_UNLOCK(fvp, 0); 943 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 944 newparent = 1; 945 946 /* 947 * XXX: We can do this here because rename uses SAVEFART and 948 * therefore fdvp has at least two references (one doesn't 949 * belong to us, though, and that's evil). We'll get 950 * another "extra" reference when we do relookup(), so we 951 * need to compensate. We should *NOT* be doing this, but 952 * it works, so whatever. 953 */ 954 vrele(fdvp); 955 956 if (doingdirectory && newparent) { 957 if (error) /* write access check above */ 958 goto tdvpbad; 959 if (xp != NULL) 960 vput(tvp); 961 tvp = NULL; 962 /* 963 * doscheckpath() vput()'s dp, 964 * so we have to do a relookup afterwards 965 */ 966 if ((error = doscheckpath(ip, dp)) != 0) 967 goto out; 968 if ((tcnp->cn_flags & SAVESTART) == 0) 969 panic("msdosfs_rename: lost to startdir"); 970 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 971 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) { 972 VOP_UNLOCK(tdvp, 0); 973 goto out; 974 } 975 /* 976 * XXX: SAVESTART causes us to get a reference, but 977 * that's released already above in doscheckpath() 978 */ 979 dp = VTODE(tdvp); 980 xp = tvp ? VTODE(tvp) : NULL; 981 } 982 983 if (xp != NULL) { 984 /* 985 * Target must be empty if a directory and have no links 986 * to it. Also, ensure source and target are compatible 987 * (both directories, or both not directories). 988 */ 989 if (xp->de_Attributes & ATTR_DIRECTORY) { 990 if (!dosdirempty(xp)) { 991 error = ENOTEMPTY; 992 goto tdvpbad; 993 } 994 if (!doingdirectory) { 995 error = ENOTDIR; 996 goto tdvpbad; 997 } 998 } else if (doingdirectory) { 999 error = EISDIR; 1000 goto tdvpbad; 1001 } 1002 if ((error = removede(dp, xp)) != 0) 1003 goto tdvpbad; 1004 VN_KNOTE(tdvp, NOTE_WRITE); 1005 VN_KNOTE(tvp, NOTE_DELETE); 1006 cache_purge(tvp); 1007 vput(tvp); 1008 tvp = NULL; 1009 xp = NULL; 1010 } 1011 1012 /* 1013 * Convert the filename in tcnp into a dos filename. We copy this 1014 * into the denode and directory entry for the destination 1015 * file/directory. 1016 */ 1017 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) 1018 goto abortit; 1019 1020 /* 1021 * Since from wasn't locked at various places above, 1022 * have to do a relookup here. 1023 */ 1024 fcnp->cn_flags &= ~MODMASK; 1025 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1026 if ((fcnp->cn_flags & SAVESTART) == 0) 1027 panic("msdosfs_rename: lost from startdir"); 1028 VOP_UNLOCK(tdvp, 0); 1029 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1030 if ((error = relookup(fdvp, &fvp, fcnp))) { 1031 VOP_UNLOCK(fdvp, 0); 1032 vrele(ap->a_fvp); 1033 vrele(tdvp); 1034 return (error); 1035 } 1036 if (fvp == NULL) { 1037 /* 1038 * From name has disappeared. 1039 */ 1040 if (doingdirectory) 1041 panic("rename: lost dir entry"); 1042 vput(fdvp); 1043 vrele(ap->a_fvp); 1044 vrele(tdvp); 1045 return 0; 1046 } 1047 fdvp_dorele = 1; 1048 VOP_UNLOCK(fdvp, 0); 1049 xp = VTODE(fvp); 1050 zp = VTODE(fdvp); 1051 from_diroffset = zp->de_fndoffset; 1052 1053 /* 1054 * Ensure that the directory entry still exists and has not 1055 * changed till now. If the source is a file the entry may 1056 * have been unlinked or renamed. In either case there is 1057 * no further work to be done. If the source is a directory 1058 * then it cannot have been rmdir'ed or renamed; this is 1059 * prohibited by the DE_RENAME flag. 1060 */ 1061 if (xp != ip) { 1062 if (doingdirectory) 1063 panic("rename: lost dir entry"); 1064 vrele(ap->a_fvp); 1065 VOP_UNLOCK(fvp, 0); 1066 xp = NULL; 1067 } else { 1068 vrele(fvp); 1069 xp = NULL; 1070 1071 /* 1072 * First write a new entry in the destination 1073 * directory and mark the entry in the source directory 1074 * as deleted. Then move the denode to the correct hash 1075 * chain for its new location in the filesystem. And, if 1076 * we moved a directory, then update its .. entry to point 1077 * to the new parent directory. 1078 */ 1079 memcpy(oldname, ip->de_Name, 11); 1080 memcpy(ip->de_Name, toname, 11); /* update denode */ 1081 dp->de_fndoffset = to_diroffset; 1082 dp->de_fndcnt = to_count; 1083 error = createde(ip, dp, (struct denode **)0, tcnp); 1084 if (error) { 1085 memcpy(ip->de_Name, oldname, 11); 1086 VOP_UNLOCK(fvp, 0); 1087 goto bad; 1088 } 1089 ip->de_refcnt++; 1090 zp->de_fndoffset = from_diroffset; 1091 if ((error = removede(zp, ip)) != 0) { 1092 /* XXX should really panic here, fs is corrupt */ 1093 VOP_UNLOCK(fvp, 0); 1094 goto bad; 1095 } 1096 cache_purge(fvp); 1097 if (!doingdirectory) { 1098 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1099 &ip->de_dirclust, 0); 1100 if (error) { 1101 /* XXX should really panic here, fs is corrupt */ 1102 VOP_UNLOCK(fvp, 0); 1103 goto bad; 1104 } 1105 ip->de_diroffset = to_diroffset; 1106 if (ip->de_dirclust != MSDOSFSROOT) 1107 ip->de_diroffset &= pmp->pm_crbomask; 1108 } 1109 reinsert(ip); 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, de_bn2kb(pmp, bn), 1124 pmp->pm_bpcluster, NOCRED, B_MODIFY, &bp); 1125 if (error) { 1126 /* XXX should really panic here, fs is corrupt */ 1127 brelse(bp, 0); 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 (tvp) 1150 vput(tvp); 1151 vrele(tdvp); 1152 out: 1153 ip->de_flag &= ~DE_RENAME; 1154 if (fdvp_dorele) 1155 vrele(fdvp); 1156 vrele(fvp); 1157 return (error); 1158 1159 /* XXX: uuuh */ 1160 tdvpbad: 1161 VOP_UNLOCK(tdvp, 0); 1162 goto bad; 1163 } 1164 1165 static const struct { 1166 struct direntry dot; 1167 struct direntry dotdot; 1168 } dosdirtemplate = { 1169 { ". ", " ", /* the . entry */ 1170 ATTR_DIRECTORY, /* file attribute */ 1171 0, /* reserved */ 1172 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1173 { 0, 0 }, /* access date */ 1174 { 0, 0 }, /* high bits of start cluster */ 1175 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1176 { 0, 0 }, /* startcluster */ 1177 { 0, 0, 0, 0 } /* filesize */ 1178 }, 1179 { ".. ", " ", /* the .. entry */ 1180 ATTR_DIRECTORY, /* file attribute */ 1181 0, /* reserved */ 1182 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1183 { 0, 0 }, /* access date */ 1184 { 0, 0 }, /* high bits of start cluster */ 1185 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1186 { 0, 0 }, /* startcluster */ 1187 { 0, 0, 0, 0 } /* filesize */ 1188 } 1189 }; 1190 1191 int 1192 msdosfs_mkdir(void *v) 1193 { 1194 struct vop_mkdir_args /* { 1195 struct vnode *a_dvp; 1196 struvt vnode **a_vpp; 1197 struvt componentname *a_cnp; 1198 struct vattr *a_vap; 1199 } */ *ap = v; 1200 struct componentname *cnp = ap->a_cnp; 1201 struct denode ndirent; 1202 struct denode *dep; 1203 struct denode *pdep = VTODE(ap->a_dvp); 1204 int error; 1205 int bn; 1206 u_long newcluster, pcl; 1207 daddr_t lbn; 1208 struct direntry *denp; 1209 struct msdosfsmount *pmp = pdep->de_pmp; 1210 struct buf *bp; 1211 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1212 1213 /* 1214 * If this is the root directory and there is no space left we 1215 * can't do anything. This is because the root directory can not 1216 * change size. 1217 */ 1218 if (pdep->de_StartCluster == MSDOSFSROOT 1219 && pdep->de_fndoffset >= pdep->de_FileSize) { 1220 error = ENOSPC; 1221 goto bad2; 1222 } 1223 1224 /* 1225 * Allocate a cluster to hold the about to be created directory. 1226 */ 1227 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1228 if (error) 1229 goto bad2; 1230 1231 memset(&ndirent, 0, sizeof(ndirent)); 1232 ndirent.de_pmp = pmp; 1233 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1234 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1235 1236 /* 1237 * Now fill the cluster with the "." and ".." entries. And write 1238 * the cluster to disk. This way it is there for the parent 1239 * directory to be pointing at if there were a crash. 1240 */ 1241 bn = cntobn(pmp, newcluster); 1242 lbn = de_bn2kb(pmp, bn); 1243 /* always succeeds */ 1244 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1245 memset(bp->b_data, 0, pmp->pm_bpcluster); 1246 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1247 denp = (struct direntry *)bp->b_data; 1248 putushort(denp[0].deStartCluster, newcluster); 1249 putushort(denp[0].deCDate, ndirent.de_CDate); 1250 putushort(denp[0].deCTime, ndirent.de_CTime); 1251 denp[0].deCHundredth = ndirent.de_CHun; 1252 putushort(denp[0].deADate, ndirent.de_ADate); 1253 putushort(denp[0].deMDate, ndirent.de_MDate); 1254 putushort(denp[0].deMTime, ndirent.de_MTime); 1255 pcl = pdep->de_StartCluster; 1256 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1257 pcl = 0; 1258 putushort(denp[1].deStartCluster, pcl); 1259 putushort(denp[1].deCDate, ndirent.de_CDate); 1260 putushort(denp[1].deCTime, ndirent.de_CTime); 1261 denp[1].deCHundredth = ndirent.de_CHun; 1262 putushort(denp[1].deADate, ndirent.de_ADate); 1263 putushort(denp[1].deMDate, ndirent.de_MDate); 1264 putushort(denp[1].deMTime, ndirent.de_MTime); 1265 if (FAT32(pmp)) { 1266 putushort(denp[0].deHighClust, newcluster >> 16); 1267 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1268 } else { 1269 putushort(denp[0].deHighClust, 0); 1270 putushort(denp[1].deHighClust, 0); 1271 } 1272 1273 if (async) 1274 bdwrite(bp); 1275 else if ((error = bwrite(bp)) != 0) 1276 goto bad; 1277 1278 /* 1279 * Now build up a directory entry pointing to the newly allocated 1280 * cluster. This will be written to an empty slot in the parent 1281 * directory. 1282 */ 1283 #ifdef DIAGNOSTIC 1284 if ((cnp->cn_flags & HASBUF) == 0) 1285 panic("msdosfs_mkdir: no name"); 1286 #endif 1287 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1288 goto bad; 1289 1290 ndirent.de_Attributes = ATTR_DIRECTORY; 1291 ndirent.de_StartCluster = newcluster; 1292 ndirent.de_FileSize = 0; 1293 ndirent.de_dev = pdep->de_dev; 1294 ndirent.de_devvp = pdep->de_devvp; 1295 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1296 goto bad; 1297 if ((cnp->cn_flags & SAVESTART) == 0) 1298 PNBUF_PUT(cnp->cn_pnbuf); 1299 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1300 vput(ap->a_dvp); 1301 *ap->a_vpp = DETOV(dep); 1302 return (0); 1303 1304 bad: 1305 clusterfree(pmp, newcluster, NULL); 1306 bad2: 1307 PNBUF_PUT(cnp->cn_pnbuf); 1308 vput(ap->a_dvp); 1309 return (error); 1310 } 1311 1312 int 1313 msdosfs_rmdir(void *v) 1314 { 1315 struct vop_rmdir_args /* { 1316 struct vnode *a_dvp; 1317 struct vnode *a_vp; 1318 struct componentname *a_cnp; 1319 } */ *ap = v; 1320 struct vnode *vp = ap->a_vp; 1321 struct vnode *dvp = ap->a_dvp; 1322 struct componentname *cnp = ap->a_cnp; 1323 struct denode *ip, *dp; 1324 int error; 1325 1326 ip = VTODE(vp); 1327 dp = VTODE(dvp); 1328 /* 1329 * No rmdir "." please. 1330 */ 1331 if (dp == ip) { 1332 vrele(dvp); 1333 vput(vp); 1334 return (EINVAL); 1335 } 1336 /* 1337 * Verify the directory is empty (and valid). 1338 * (Rmdir ".." won't be valid since 1339 * ".." will contain a reference to 1340 * the current directory and thus be 1341 * non-empty.) 1342 */ 1343 error = 0; 1344 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1345 error = ENOTEMPTY; 1346 goto out; 1347 } 1348 /* 1349 * Delete the entry from the directory. For dos filesystems this 1350 * gets rid of the directory entry on disk, the in memory copy 1351 * still exists but the de_refcnt is <= 0. This prevents it from 1352 * being found by deget(). When the vput() on dep is done we give 1353 * up access and eventually msdosfs_reclaim() will be called which 1354 * will remove it from the denode cache. 1355 */ 1356 if ((error = removede(dp, ip)) != 0) 1357 goto out; 1358 /* 1359 * This is where we decrement the link count in the parent 1360 * directory. Since dos filesystems don't do this we just purge 1361 * the name cache and let go of the parent directory denode. 1362 */ 1363 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1364 cache_purge(dvp); 1365 vput(dvp); 1366 dvp = NULL; 1367 /* 1368 * Truncate the directory that is being deleted. 1369 */ 1370 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1371 cache_purge(vp); 1372 out: 1373 VN_KNOTE(vp, NOTE_DELETE); 1374 if (dvp) 1375 vput(dvp); 1376 vput(vp); 1377 return (error); 1378 } 1379 1380 /* 1381 * DOS filesystems don't know what symlinks are. 1382 */ 1383 int 1384 msdosfs_symlink(void *v) 1385 { 1386 struct vop_symlink_args /* { 1387 struct vnode *a_dvp; 1388 struct vnode **a_vpp; 1389 struct componentname *a_cnp; 1390 struct vattr *a_vap; 1391 char *a_target; 1392 } */ *ap = v; 1393 1394 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1395 vput(ap->a_dvp); 1396 return (EOPNOTSUPP); 1397 } 1398 1399 int 1400 msdosfs_readdir(void *v) 1401 { 1402 struct vop_readdir_args /* { 1403 struct vnode *a_vp; 1404 struct uio *a_uio; 1405 kauth_cred_t a_cred; 1406 int *a_eofflag; 1407 off_t **a_cookies; 1408 int *a_ncookies; 1409 } */ *ap = v; 1410 int error = 0; 1411 int diff; 1412 long n; 1413 int blsize; 1414 long on; 1415 long lost; 1416 long count; 1417 u_long cn; 1418 ino_t fileno; 1419 u_long dirsperblk; 1420 long bias = 0; 1421 daddr_t bn, lbn; 1422 struct buf *bp; 1423 struct denode *dep = VTODE(ap->a_vp); 1424 struct msdosfsmount *pmp = dep->de_pmp; 1425 struct direntry *dentp; 1426 struct dirent *dirbuf; 1427 struct uio *uio = ap->a_uio; 1428 off_t *cookies = NULL; 1429 int ncookies = 0, nc = 0; 1430 off_t offset, uio_off; 1431 int chksum = -1; 1432 1433 #ifdef MSDOSFS_DEBUG 1434 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1435 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1436 #endif 1437 1438 /* 1439 * msdosfs_readdir() won't operate properly on regular files since 1440 * it does i/o only with the filesystem vnode, and hence can 1441 * retrieve the wrong block from the buffer cache for a plain file. 1442 * So, fail attempts to readdir() on a plain file. 1443 */ 1444 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1445 return (ENOTDIR); 1446 1447 /* 1448 * If the user buffer is smaller than the size of one dos directory 1449 * entry or the file offset is not a multiple of the size of a 1450 * directory entry, then we fail the read. 1451 */ 1452 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1453 offset = uio->uio_offset; 1454 if (count < sizeof(struct direntry) || 1455 (offset & (sizeof(struct direntry) - 1))) 1456 return (EINVAL); 1457 lost = uio->uio_resid - count; 1458 uio->uio_resid = count; 1459 uio_off = uio->uio_offset; 1460 1461 /* Allocate a temporary dirent buffer. */ 1462 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1463 1464 if (ap->a_ncookies) { 1465 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 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, " 1483 "offset %" PRIu64 "\n", 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, dirbuf->d_reclen, uio); 1512 if (error) 1513 goto out; 1514 offset += sizeof(struct direntry); 1515 uio_off = offset; 1516 if (cookies) { 1517 *cookies++ = offset; 1518 ncookies++; 1519 if (ncookies >= nc) 1520 goto out; 1521 } 1522 } 1523 } 1524 } 1525 1526 while (uio->uio_resid > 0) { 1527 lbn = de_cluster(pmp, offset - bias); 1528 on = (offset - bias) & pmp->pm_crbomask; 1529 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1530 diff = dep->de_FileSize - (offset - bias); 1531 if (diff <= 0) 1532 break; 1533 n = MIN(n, diff); 1534 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1535 break; 1536 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1537 NOCRED, 0, &bp); 1538 if (error) { 1539 brelse(bp, 0); 1540 free(dirbuf, M_MSDOSFSTMP); 1541 return (error); 1542 } 1543 n = MIN(n, blsize - bp->b_resid); 1544 1545 /* 1546 * Convert from dos directory entries to fs-independent 1547 * directory entries. 1548 */ 1549 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1550 (char *)dentp < (char *)bp->b_data + on + n; 1551 dentp++, offset += sizeof(struct direntry)) { 1552 #if 0 1553 1554 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1555 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1556 #endif 1557 /* 1558 * If this is an unused entry, we can stop. 1559 */ 1560 if (dentp->deName[0] == SLOT_EMPTY) { 1561 brelse(bp, 0); 1562 goto out; 1563 } 1564 /* 1565 * Skip deleted entries. 1566 */ 1567 if (dentp->deName[0] == SLOT_DELETED) { 1568 chksum = -1; 1569 continue; 1570 } 1571 1572 /* 1573 * Handle Win95 long directory entries 1574 */ 1575 if (dentp->deAttributes == ATTR_WIN95) { 1576 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1577 continue; 1578 chksum = win2unixfn((struct winentry *)dentp, 1579 dirbuf, chksum); 1580 continue; 1581 } 1582 1583 /* 1584 * Skip volume labels 1585 */ 1586 if (dentp->deAttributes & ATTR_VOLUME) { 1587 chksum = -1; 1588 continue; 1589 } 1590 /* 1591 * This computation of d_fileno must match 1592 * the computation of va_fileid in 1593 * msdosfs_getattr. 1594 */ 1595 if (dentp->deAttributes & ATTR_DIRECTORY) { 1596 fileno = getushort(dentp->deStartCluster); 1597 if (FAT32(pmp)) 1598 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1599 /* if this is the root directory */ 1600 if (fileno == MSDOSFSROOT) 1601 if (FAT32(pmp)) 1602 fileno = cntobn(pmp, 1603 (ino_t)pmp->pm_rootdirblk) 1604 * dirsperblk; 1605 else 1606 fileno = 1; 1607 else 1608 fileno = cntobn(pmp, fileno) * dirsperblk; 1609 dirbuf->d_fileno = fileno; 1610 dirbuf->d_type = DT_DIR; 1611 } else { 1612 dirbuf->d_fileno = 1613 offset / sizeof(struct direntry); 1614 dirbuf->d_type = DT_REG; 1615 } 1616 if (chksum != winChksum(dentp->deName)) 1617 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1618 (u_char *)dirbuf->d_name, 1619 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1620 else 1621 dirbuf->d_name[dirbuf->d_namlen] = 0; 1622 chksum = -1; 1623 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1624 if (uio->uio_resid < dirbuf->d_reclen) { 1625 brelse(bp, 0); 1626 goto out; 1627 } 1628 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1629 if (error) { 1630 brelse(bp, 0); 1631 goto out; 1632 } 1633 uio_off = offset + sizeof(struct direntry); 1634 if (cookies) { 1635 *cookies++ = offset + sizeof(struct direntry); 1636 ncookies++; 1637 if (ncookies >= nc) { 1638 brelse(bp, 0); 1639 goto out; 1640 } 1641 } 1642 } 1643 brelse(bp, 0); 1644 } 1645 1646 out: 1647 uio->uio_offset = uio_off; 1648 uio->uio_resid += lost; 1649 if (dep->de_FileSize - (offset - bias) <= 0) 1650 *ap->a_eofflag = 1; 1651 else 1652 *ap->a_eofflag = 0; 1653 1654 if (ap->a_ncookies) { 1655 if (error) { 1656 free(*ap->a_cookies, M_TEMP); 1657 *ap->a_ncookies = 0; 1658 *ap->a_cookies = NULL; 1659 } else 1660 *ap->a_ncookies = ncookies; 1661 } 1662 free(dirbuf, M_MSDOSFSTMP); 1663 return (error); 1664 } 1665 1666 /* 1667 * DOS filesystems don't know what symlinks are. 1668 */ 1669 int 1670 msdosfs_readlink(void *v) 1671 { 1672 #if 0 1673 struct vop_readlink_args /* { 1674 struct vnode *a_vp; 1675 struct uio *a_uio; 1676 kauth_cred_t a_cred; 1677 } */ *ap; 1678 #endif 1679 1680 return (EINVAL); 1681 } 1682 1683 /* 1684 * vp - address of vnode file the file 1685 * bn - which cluster we are interested in mapping to a filesystem block number. 1686 * vpp - returns the vnode for the block special file holding the filesystem 1687 * containing the file of interest 1688 * bnp - address of where to return the filesystem relative block number 1689 */ 1690 int 1691 msdosfs_bmap(void *v) 1692 { 1693 struct vop_bmap_args /* { 1694 struct vnode *a_vp; 1695 daddr_t a_bn; 1696 struct vnode **a_vpp; 1697 daddr_t *a_bnp; 1698 int *a_runp; 1699 } */ *ap = v; 1700 struct denode *dep = VTODE(ap->a_vp); 1701 int run, maxrun; 1702 daddr_t runbn; 1703 int status; 1704 1705 if (ap->a_vpp != NULL) 1706 *ap->a_vpp = dep->de_devvp; 1707 if (ap->a_bnp == NULL) 1708 return (0); 1709 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1710 1711 /* 1712 * From FreeBSD: 1713 * A little kludgy, but we loop calling pcbmap until we 1714 * reach the end of the contiguous piece, or reach MAXPHYS. 1715 * Since it reduces disk I/Os, the "wasted" CPU is put to 1716 * good use (4 to 5 fold sequential read I/O improvement on USB 1717 * drives). 1718 */ 1719 if (ap->a_runp != NULL) { 1720 /* taken from ufs_bmap */ 1721 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1722 dep->de_pmp->pm_maxcluster - ap->a_bn); 1723 for (run = 1; run <= maxrun; run++) { 1724 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1725 != 0 || runbn != 1726 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1727 break; 1728 } 1729 *ap->a_runp = run - 1; 1730 } 1731 1732 /* 1733 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1734 */ 1735 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1736 return status; 1737 } 1738 1739 int 1740 msdosfs_strategy(void *v) 1741 { 1742 struct vop_strategy_args /* { 1743 struct vnode *a_vp; 1744 struct buf *a_bp; 1745 } */ *ap = v; 1746 struct vnode *vp = ap->a_vp; 1747 struct buf *bp = ap->a_bp; 1748 struct denode *dep = VTODE(bp->b_vp); 1749 int error = 0; 1750 1751 if (vp->v_type == VBLK || vp->v_type == VCHR) 1752 panic("msdosfs_strategy: spec"); 1753 /* 1754 * If we don't already know the filesystem relative block number 1755 * then get it using pcbmap(). If pcbmap() returns the block 1756 * number as -1 then we've got a hole in the file. DOS filesystems 1757 * don't allow files with holes, so we shouldn't ever see this. 1758 */ 1759 if (bp->b_blkno == bp->b_lblkno) { 1760 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1761 &bp->b_blkno, 0, 0); 1762 if (error) 1763 bp->b_blkno = -1; 1764 if (bp->b_blkno == -1) 1765 clrbuf(bp); 1766 else 1767 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1768 } 1769 if (bp->b_blkno == -1) { 1770 biodone(bp); 1771 return (error); 1772 } 1773 1774 /* 1775 * Read/write the block from/to the disk that contains the desired 1776 * file block. 1777 */ 1778 1779 vp = dep->de_devvp; 1780 return (VOP_STRATEGY(vp, bp)); 1781 } 1782 1783 int 1784 msdosfs_print(void *v) 1785 { 1786 struct vop_print_args /* { 1787 struct vnode *vp; 1788 } */ *ap = v; 1789 struct denode *dep = VTODE(ap->a_vp); 1790 1791 printf( 1792 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1793 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1794 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1795 (unsigned long long)minor(dep->de_dev)); 1796 printf("\n"); 1797 return (0); 1798 } 1799 1800 int 1801 msdosfs_advlock(void *v) 1802 { 1803 struct vop_advlock_args /* { 1804 struct vnode *a_vp; 1805 void *a_id; 1806 int a_op; 1807 struct flock *a_fl; 1808 int a_flags; 1809 } */ *ap = v; 1810 struct denode *dep = VTODE(ap->a_vp); 1811 1812 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1813 } 1814 1815 int 1816 msdosfs_pathconf(void *v) 1817 { 1818 struct vop_pathconf_args /* { 1819 struct vnode *a_vp; 1820 int a_name; 1821 register_t *a_retval; 1822 } */ *ap = v; 1823 1824 switch (ap->a_name) { 1825 case _PC_LINK_MAX: 1826 *ap->a_retval = 1; 1827 return (0); 1828 case _PC_NAME_MAX: 1829 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1830 return (0); 1831 case _PC_PATH_MAX: 1832 *ap->a_retval = PATH_MAX; 1833 return (0); 1834 case _PC_CHOWN_RESTRICTED: 1835 *ap->a_retval = 1; 1836 return (0); 1837 case _PC_NO_TRUNC: 1838 *ap->a_retval = 0; 1839 return (0); 1840 case _PC_SYNC_IO: 1841 *ap->a_retval = 1; 1842 return (0); 1843 case _PC_FILESIZEBITS: 1844 *ap->a_retval = 32; 1845 return (0); 1846 default: 1847 return (EINVAL); 1848 } 1849 /* NOTREACHED */ 1850 } 1851 1852 int 1853 msdosfs_fsync(void *v) 1854 { 1855 struct vop_fsync_args /* { 1856 struct vnode *a_vp; 1857 kauth_cred_t a_cred; 1858 int a_flags; 1859 off_t offlo; 1860 off_t offhi; 1861 } */ *ap = v; 1862 struct vnode *vp = ap->a_vp; 1863 int wait; 1864 int error; 1865 1866 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1867 vflushbuf(vp, wait); 1868 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 1869 error = 0; 1870 else 1871 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1872 1873 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1874 struct denode *dep = VTODE(vp); 1875 struct vnode *devvp = dep->de_devvp; 1876 1877 int l = 0; 1878 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1879 curlwp->l_cred); 1880 } 1881 1882 return (error); 1883 } 1884 1885 void 1886 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1887 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1888 { 1889 struct timespec *ts = NULL, tsb; 1890 1891 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1892 /* XXX just call getnanotime early and use result if needed? */ 1893 dep->de_flag |= DE_MODIFIED; 1894 if (dep->de_flag & DE_UPDATE) { 1895 if (mod == NULL) { 1896 getnanotime(&tsb); 1897 mod = ts = &tsb; 1898 } 1899 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1900 dep->de_Attributes |= ATTR_ARCHIVE; 1901 } 1902 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1903 if (dep->de_flag & DE_ACCESS) { 1904 if (acc == NULL) 1905 acc = ts == NULL ? 1906 (getnanotime(&tsb), ts = &tsb) : ts; 1907 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1908 } 1909 if (dep->de_flag & DE_CREATE) { 1910 if (cre == NULL) 1911 cre = ts == NULL ? 1912 (getnanotime(&tsb), ts = &tsb) : ts; 1913 unix2dostime(cre, gmtoff, &dep->de_CDate, 1914 &dep->de_CTime, &dep->de_CHun); 1915 } 1916 } 1917 1918 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1919 } 1920 1921 /* Global vfs data structures for msdosfs */ 1922 int (**msdosfs_vnodeop_p)(void *); 1923 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1924 { &vop_default_desc, vn_default_error }, 1925 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1926 { &vop_create_desc, msdosfs_create }, /* create */ 1927 { &vop_mknod_desc, msdosfs_mknod }, /* mknod */ 1928 { &vop_open_desc, msdosfs_open }, /* open */ 1929 { &vop_close_desc, msdosfs_close }, /* close */ 1930 { &vop_access_desc, msdosfs_access }, /* access */ 1931 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1932 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1933 { &vop_read_desc, msdosfs_read }, /* read */ 1934 { &vop_write_desc, msdosfs_write }, /* write */ 1935 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1936 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1937 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1938 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1939 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1940 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1941 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1942 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1943 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1944 { &vop_link_desc, msdosfs_link }, /* link */ 1945 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1946 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1947 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1948 { &vop_symlink_desc, msdosfs_symlink }, /* symlink */ 1949 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1950 { &vop_readlink_desc, msdosfs_readlink }, /* readlink */ 1951 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1952 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1953 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1954 { &vop_lock_desc, genfs_lock }, /* lock */ 1955 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1956 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1957 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1958 { &vop_print_desc, msdosfs_print }, /* print */ 1959 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1960 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1961 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1962 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1963 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1964 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1965 { NULL, NULL } 1966 }; 1967 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1968 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1969