1 /* $NetBSD: msdosfs_vnops.c,v 1.96 2016/02/01 16:53:23 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 1.96 2016/02/01 16:53:23 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/fstrans.h> 64 #include <sys/vnode.h> 65 #include <sys/signalvar.h> 66 #include <sys/malloc.h> 67 #include <sys/dirent.h> 68 #include <sys/lockf.h> 69 #include <sys/kauth.h> 70 71 #include <miscfs/genfs/genfs.h> 72 #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 73 74 #include <uvm/uvm_extern.h> 75 76 #include <fs/msdosfs/bpb.h> 77 #include <fs/msdosfs/direntry.h> 78 #include <fs/msdosfs/denode.h> 79 #include <fs/msdosfs/msdosfsmount.h> 80 #include <fs/msdosfs/fat.h> 81 82 /* 83 * Some general notes: 84 * 85 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 86 * read/written using the vnode for the filesystem. Blocks that represent 87 * the contents of a file are read/written using the vnode for the file 88 * (including directories when they are read/written as files). This 89 * presents problems for the dos filesystem because data that should be in 90 * an inode (if dos had them) resides in the directory itself. Since we 91 * must update directory entries without the benefit of having the vnode 92 * for the directory we must use the vnode for the filesystem. This means 93 * that when a directory is actually read/written (via read, write, or 94 * readdir, or seek) we must use the vnode for the filesystem instead of 95 * the vnode for the directory as would happen in ufs. This is to insure we 96 * retrieve the correct block from the buffer cache since the hash value is 97 * based upon the vnode address and the desired block number. 98 */ 99 100 /* 101 * Create a regular file. On entry the directory to contain the file being 102 * created is locked. We must release before we return. 103 */ 104 int 105 msdosfs_create(void *v) 106 { 107 struct vop_create_v3_args /* { 108 struct vnode *a_dvp; 109 struct vnode **a_vpp; 110 struct componentname *a_cnp; 111 struct vattr *a_vap; 112 } */ *ap = v; 113 struct componentname *cnp = ap->a_cnp; 114 struct denode ndirent; 115 struct denode *dep; 116 struct denode *pdep = VTODE(ap->a_dvp); 117 int error; 118 119 #ifdef MSDOSFS_DEBUG 120 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 121 #endif 122 123 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 124 /* 125 * If this is the root directory and there is no space left we 126 * can't do anything. This is because the root directory can not 127 * change size. 128 */ 129 if (pdep->de_StartCluster == MSDOSFSROOT 130 && pdep->de_fndoffset >= pdep->de_FileSize) { 131 error = ENOSPC; 132 goto bad; 133 } 134 135 /* 136 * Create a directory entry for the file, then call createde() to 137 * have it installed. NOTE: DOS files are always executable. We 138 * use the absence of the owner write bit to make the file 139 * readonly. 140 */ 141 memset(&ndirent, 0, sizeof(ndirent)); 142 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 143 goto bad; 144 145 ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ? 146 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 147 ndirent.de_StartCluster = 0; 148 ndirent.de_FileSize = 0; 149 ndirent.de_dev = pdep->de_dev; 150 ndirent.de_devvp = pdep->de_devvp; 151 ndirent.de_pmp = pdep->de_pmp; 152 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 153 DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff); 154 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 155 goto bad; 156 fstrans_done(ap->a_dvp->v_mount); 157 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 158 *ap->a_vpp = DETOV(dep); 159 return (0); 160 161 bad: 162 fstrans_done(ap->a_dvp->v_mount); 163 return (error); 164 } 165 166 int 167 msdosfs_close(void *v) 168 { 169 struct vop_close_args /* { 170 struct vnode *a_vp; 171 int a_fflag; 172 kauth_cred_t a_cred; 173 } */ *ap = v; 174 struct vnode *vp = ap->a_vp; 175 struct denode *dep = VTODE(vp); 176 177 fstrans_start(vp->v_mount, FSTRANS_SHARED); 178 mutex_enter(vp->v_interlock); 179 if (vp->v_usecount > 1) 180 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 181 mutex_exit(vp->v_interlock); 182 fstrans_done(vp->v_mount); 183 return (0); 184 } 185 186 static int 187 msdosfs_check_possible(struct vnode *vp, struct denode *dep, mode_t mode) 188 { 189 190 /* 191 * Disallow write attempts on read-only file systems; 192 * unless the file is a socket, fifo, or a block or 193 * character device resident on the file system. 194 */ 195 if (mode & VWRITE) { 196 switch (vp->v_type) { 197 case VDIR: 198 case VLNK: 199 case VREG: 200 if (vp->v_mount->mnt_flag & MNT_RDONLY) 201 return (EROFS); 202 default: 203 break; 204 } 205 } 206 207 return 0; 208 } 209 210 static int 211 msdosfs_check_permitted(struct vnode *vp, struct denode *dep, mode_t mode, 212 kauth_cred_t cred) 213 { 214 struct msdosfsmount *pmp = dep->de_pmp; 215 mode_t file_mode; 216 217 if ((dep->de_Attributes & ATTR_READONLY) == 0) 218 file_mode = S_IRWXU|S_IRWXG|S_IRWXO; 219 else 220 file_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 221 222 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 223 224 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 225 vp->v_type, file_mode), vp, NULL, genfs_can_access(vp->v_type, 226 file_mode, pmp->pm_uid, pmp->pm_gid, mode, cred)); 227 } 228 229 int 230 msdosfs_access(void *v) 231 { 232 struct vop_access_args /* { 233 struct vnode *a_vp; 234 int a_mode; 235 kauth_cred_t a_cred; 236 } */ *ap = v; 237 struct vnode *vp = ap->a_vp; 238 struct denode *dep = VTODE(vp); 239 int error; 240 241 error = msdosfs_check_possible(vp, dep, ap->a_mode); 242 if (error) 243 return error; 244 245 error = msdosfs_check_permitted(vp, dep, ap->a_mode, ap->a_cred); 246 247 return error; 248 } 249 250 int 251 msdosfs_getattr(void *v) 252 { 253 struct vop_getattr_args /* { 254 struct vnode *a_vp; 255 struct vattr *a_vap; 256 kauth_cred_t a_cred; 257 } */ *ap = v; 258 struct denode *dep = VTODE(ap->a_vp); 259 struct msdosfsmount *pmp = dep->de_pmp; 260 struct vattr *vap = ap->a_vap; 261 mode_t mode; 262 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 263 ino_t fileid; 264 265 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 266 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 267 vap->va_fsid = dep->de_dev; 268 /* 269 * The following computation of the fileid must be the same as that 270 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 271 * doesn't work. 272 */ 273 if (dep->de_Attributes & ATTR_DIRECTORY) { 274 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 275 if (dep->de_StartCluster == MSDOSFSROOT) 276 fileid = 1; 277 } else { 278 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 279 if (dep->de_dirclust == MSDOSFSROOT) 280 fileid = roottobn(pmp, 0) * dirsperblk; 281 fileid += dep->de_diroffset / sizeof(struct direntry); 282 } 283 vap->va_fileid = fileid; 284 if ((dep->de_Attributes & ATTR_READONLY) == 0) 285 mode = S_IRWXU|S_IRWXG|S_IRWXO; 286 else 287 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 288 vap->va_mode = 289 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 290 vap->va_uid = pmp->pm_uid; 291 vap->va_gid = pmp->pm_gid; 292 vap->va_nlink = 1; 293 vap->va_rdev = 0; 294 vap->va_size = ap->a_vp->v_size; 295 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 296 &vap->va_mtime); 297 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 298 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 299 &vap->va_atime); 300 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 301 pmp->pm_gmtoff, &vap->va_ctime); 302 } else { 303 vap->va_atime = vap->va_mtime; 304 vap->va_ctime = vap->va_mtime; 305 } 306 vap->va_flags = 0; 307 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) { 308 vap->va_flags |= SF_ARCHIVED; 309 vap->va_mode |= S_ARCH1; 310 } 311 vap->va_gen = 0; 312 vap->va_blocksize = pmp->pm_bpcluster; 313 vap->va_bytes = 314 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 315 vap->va_type = ap->a_vp->v_type; 316 fstrans_done(ap->a_vp->v_mount); 317 return (0); 318 } 319 320 int 321 msdosfs_setattr(void *v) 322 { 323 struct vop_setattr_args /* { 324 struct vnode *a_vp; 325 struct vattr *a_vap; 326 kauth_cred_t a_cred; 327 } */ *ap = v; 328 int error = 0, de_changed = 0; 329 struct denode *dep = VTODE(ap->a_vp); 330 struct msdosfsmount *pmp = dep->de_pmp; 331 struct vnode *vp = ap->a_vp; 332 struct vattr *vap = ap->a_vap; 333 kauth_cred_t cred = ap->a_cred; 334 335 #ifdef MSDOSFS_DEBUG 336 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 337 ap->a_vp, vap, cred); 338 #endif 339 /* 340 * Note we silently ignore uid or gid changes. 341 */ 342 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 343 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 344 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 345 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 346 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 347 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 348 #ifdef MSDOSFS_DEBUG 349 printf("msdosfs_setattr(): returning EINVAL\n"); 350 printf(" va_type %d, va_nlink %x, va_fsid %"PRIx64", va_fileid %llx\n", 351 vap->va_type, vap->va_nlink, vap->va_fsid, 352 (unsigned long long)vap->va_fileid); 353 printf(" va_blocksize %lx, va_rdev %"PRIx64", va_bytes %"PRIx64", va_gen %lx\n", 354 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 355 #endif 356 return (EINVAL); 357 } 358 /* 359 * Silently ignore attributes modifications on directories. 360 */ 361 if (ap->a_vp->v_type == VDIR) 362 return 0; 363 364 fstrans_start(vp->v_mount, FSTRANS_SHARED); 365 if (vap->va_size != VNOVAL) { 366 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 367 error = EROFS; 368 goto bad; 369 } 370 error = detrunc(dep, (u_long)vap->va_size, 0, cred); 371 if (error) 372 goto bad; 373 de_changed = 1; 374 } 375 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 376 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 377 error = EROFS; 378 goto bad; 379 } 380 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, 381 ap->a_vp, NULL, genfs_can_chtimes(ap->a_vp, vap->va_vaflags, 382 pmp->pm_uid, cred)); 383 if (error) 384 goto bad; 385 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 386 vap->va_atime.tv_sec != VNOVAL) 387 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 388 if (vap->va_mtime.tv_sec != VNOVAL) 389 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 390 dep->de_Attributes |= ATTR_ARCHIVE; 391 dep->de_flag |= DE_MODIFIED; 392 de_changed = 1; 393 } 394 /* 395 * DOS files only have the ability to have their writability 396 * attribute set, so we use the owner write bit to set the readonly 397 * attribute. 398 */ 399 if (vap->va_mode != (mode_t)VNOVAL) { 400 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 401 error = EROFS; 402 goto bad; 403 } 404 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 405 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 406 if (error) 407 goto bad; 408 /* We ignore the read and execute bits. */ 409 if (vap->va_mode & S_IWUSR) 410 dep->de_Attributes &= ~ATTR_READONLY; 411 else 412 dep->de_Attributes |= ATTR_READONLY; 413 dep->de_flag |= DE_MODIFIED; 414 de_changed = 1; 415 } 416 /* 417 * Allow the `archived' bit to be toggled. 418 */ 419 if (vap->va_flags != VNOVAL) { 420 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 421 error = EROFS; 422 goto bad; 423 } 424 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_FLAGS, vp, 425 NULL, genfs_can_chflags(cred, vp->v_type, pmp->pm_uid, false)); 426 if (error) 427 goto bad; 428 if (vap->va_flags & SF_ARCHIVED) 429 dep->de_Attributes &= ~ATTR_ARCHIVE; 430 else 431 dep->de_Attributes |= ATTR_ARCHIVE; 432 dep->de_flag |= DE_MODIFIED; 433 de_changed = 1; 434 } 435 436 if (de_changed) { 437 VN_KNOTE(vp, NOTE_ATTRIB); 438 error = deupdat(dep, 1); 439 if (error) 440 goto bad; 441 } 442 443 bad: 444 fstrans_done(vp->v_mount); 445 return error; 446 } 447 448 int 449 msdosfs_read(void *v) 450 { 451 struct vop_read_args /* { 452 struct vnode *a_vp; 453 struct uio *a_uio; 454 int a_ioflag; 455 kauth_cred_t a_cred; 456 } */ *ap = v; 457 int error = 0; 458 int64_t diff; 459 int blsize; 460 long n; 461 long on; 462 daddr_t lbn; 463 vsize_t bytelen; 464 struct buf *bp; 465 struct vnode *vp = ap->a_vp; 466 struct denode *dep = VTODE(vp); 467 struct msdosfsmount *pmp = dep->de_pmp; 468 struct uio *uio = ap->a_uio; 469 470 /* 471 * If they didn't ask for any data, then we are done. 472 */ 473 474 if (uio->uio_resid == 0) 475 return (0); 476 if (uio->uio_offset < 0) 477 return (EINVAL); 478 if (uio->uio_offset >= dep->de_FileSize) 479 return (0); 480 481 fstrans_start(vp->v_mount, FSTRANS_SHARED); 482 if (vp->v_type == VREG) { 483 const int advice = IO_ADV_DECODE(ap->a_ioflag); 484 485 while (uio->uio_resid > 0) { 486 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 487 uio->uio_resid); 488 489 if (bytelen == 0) 490 break; 491 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 492 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 493 if (error) 494 break; 495 } 496 dep->de_flag |= DE_ACCESS; 497 goto out; 498 } 499 500 /* this loop is only for directories now */ 501 do { 502 lbn = de_cluster(pmp, uio->uio_offset); 503 on = uio->uio_offset & pmp->pm_crbomask; 504 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 505 if (uio->uio_offset >= dep->de_FileSize) { 506 fstrans_done(vp->v_mount); 507 return (0); 508 } 509 /* file size (and hence diff) may be up to 4GB */ 510 diff = dep->de_FileSize - uio->uio_offset; 511 if (diff < n) 512 n = (long) diff; 513 514 /* convert cluster # to sector # */ 515 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 516 if (error) 517 goto bad; 518 519 /* 520 * If we are operating on a directory file then be sure to 521 * do i/o with the vnode for the filesystem instead of the 522 * vnode for the directory. 523 */ 524 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 525 0, &bp); 526 if (error) { 527 goto bad; 528 } 529 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 530 error = uiomove((char *)bp->b_data + on, (int) n, uio); 531 brelse(bp, 0); 532 } while (error == 0 && uio->uio_resid > 0 && n != 0); 533 534 out: 535 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) { 536 int uerror; 537 538 uerror = deupdat(dep, 1); 539 if (error == 0) 540 error = uerror; 541 } 542 bad: 543 fstrans_done(vp->v_mount); 544 return (error); 545 } 546 547 /* 548 * Write data to a file or directory. 549 */ 550 int 551 msdosfs_write(void *v) 552 { 553 struct vop_write_args /* { 554 struct vnode *a_vp; 555 struct uio *a_uio; 556 int a_ioflag; 557 kauth_cred_t a_cred; 558 } */ *ap = v; 559 int resid, extended = 0; 560 int error = 0; 561 int ioflag = ap->a_ioflag; 562 u_long osize; 563 u_long count; 564 vsize_t bytelen; 565 off_t oldoff; 566 size_t rem; 567 struct uio *uio = ap->a_uio; 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 bool 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 fstrans_start(vp->v_mount, FSTRANS_SHARED); 603 /* 604 * If the offset we are starting the write at is beyond the end of 605 * the file, then they've done a seek. Unix filesystems allow 606 * files with holes in them, DOS doesn't so we must fill the hole 607 * with zeroed blocks. 608 */ 609 if (uio->uio_offset > dep->de_FileSize) { 610 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) { 611 fstrans_done(vp->v_mount); 612 return (error); 613 } 614 } 615 616 /* 617 * Remember some values in case the write fails. 618 */ 619 async = vp->v_mount->mnt_flag & MNT_ASYNC; 620 resid = uio->uio_resid; 621 osize = dep->de_FileSize; 622 623 /* 624 * If we write beyond the end of the file, extend it to its ultimate 625 * size ahead of the time to hopefully get a contiguous area. 626 */ 627 if (uio->uio_offset + resid > osize) { 628 count = de_clcount(pmp, uio->uio_offset + resid) - 629 de_clcount(pmp, osize); 630 if ((error = extendfile(dep, count, NULL, NULL, 0))) 631 goto errexit; 632 633 dep->de_FileSize = uio->uio_offset + resid; 634 /* hint uvm to not read in extended part */ 635 uvm_vnp_setwritesize(vp, dep->de_FileSize); 636 /* zero out the remainder of the last page */ 637 rem = round_page(dep->de_FileSize) - dep->de_FileSize; 638 if (rem > 0) 639 ubc_zerorange(&vp->v_uobj, (off_t)dep->de_FileSize, 640 rem, UBC_UNMAP_FLAG(vp)); 641 extended = 1; 642 } 643 644 do { 645 oldoff = uio->uio_offset; 646 bytelen = uio->uio_resid; 647 648 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 649 IO_ADV_DECODE(ioflag), UBC_WRITE | UBC_UNMAP_FLAG(vp)); 650 if (error) 651 break; 652 653 /* 654 * flush what we just wrote if necessary. 655 * XXXUBC simplistic async flushing. 656 */ 657 658 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 659 mutex_enter(vp->v_interlock); 660 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 661 (uio->uio_offset >> 16) << 16, 662 PGO_CLEANIT | PGO_LAZY); 663 } 664 } while (error == 0 && uio->uio_resid > 0); 665 666 /* set final size */ 667 uvm_vnp_setsize(vp, dep->de_FileSize); 668 if (error == 0 && ioflag & IO_SYNC) { 669 mutex_enter(vp->v_interlock); 670 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 671 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 672 } 673 dep->de_flag |= DE_UPDATE; 674 675 /* 676 * If the write failed and they want us to, truncate the file back 677 * to the size it was before the write was attempted. 678 */ 679 errexit: 680 if (resid > uio->uio_resid) 681 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 682 if (error) { 683 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED); 684 uio->uio_offset -= resid - uio->uio_resid; 685 uio->uio_resid = resid; 686 } else if ((ioflag & IO_SYNC) == IO_SYNC) 687 error = deupdat(dep, 1); 688 fstrans_done(vp->v_mount); 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(void *v) 733 { 734 struct vop_remove_args /* { 735 struct vnode *a_dvp; 736 struct vnode *a_vp; 737 struct componentname *a_cnp; 738 } */ *ap = v; 739 struct denode *dep = VTODE(ap->a_vp); 740 struct denode *ddep = VTODE(ap->a_dvp); 741 int error; 742 743 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 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 fstrans_done(ap->a_dvp->v_mount); 761 return (error); 762 } 763 764 /* 765 * Renames on files require moving the denode to a new hash queue since the 766 * denode's location is used to compute which hash queue to put the file 767 * in. Unless it is a rename in place. For example "mv a b". 768 * 769 * What follows is the basic algorithm: 770 * 771 * if (file move) { 772 * if (dest file exists) { 773 * remove dest file 774 * } 775 * if (dest and src in same directory) { 776 * rewrite name in existing directory slot 777 * } else { 778 * write new entry in dest directory 779 * update offset and dirclust in denode 780 * move denode to new hash chain 781 * clear old directory entry 782 * } 783 * } else { 784 * directory move 785 * if (dest directory exists) { 786 * if (dest is not empty) { 787 * return ENOTEMPTY 788 * } 789 * remove dest directory 790 * } 791 * if (dest and src in same directory) { 792 * rewrite name in existing entry 793 * } else { 794 * be sure dest is not a child of src directory 795 * write entry in dest directory 796 * update "." and ".." in moved directory 797 * update offset and dirclust in denode 798 * move denode to new hash chain 799 * clear old directory entry for moved directory 800 * } 801 * } 802 * 803 * On entry: 804 * source's parent directory is unlocked 805 * source file or directory is unlocked 806 * destination's parent directory is locked 807 * destination file or directory is locked if it exists 808 * 809 * On exit: 810 * all denodes should be released 811 * 812 * Notes: 813 * I'm not sure how the memory containing the pathnames pointed at by the 814 * componentname structures is freed, there may be some memory bleeding 815 * for each rename done. 816 * 817 * --More-- Notes: 818 * This routine needs help. badly. 819 */ 820 int 821 msdosfs_rename(void *v) 822 { 823 struct vop_rename_args /* { 824 struct vnode *a_fdvp; 825 struct vnode *a_fvp; 826 struct componentname *a_fcnp; 827 struct vnode *a_tdvp; 828 struct vnode *a_tvp; 829 struct componentname *a_tcnp; 830 } */ *ap = v; 831 struct vnode *tvp = ap->a_tvp; 832 struct vnode *tdvp = ap->a_tdvp; 833 struct vnode *fvp = ap->a_fvp; 834 struct vnode *fdvp = ap->a_fdvp; 835 struct mount *mp = fdvp->v_mount; 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[12], oldname[12]; 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; 849 850 pmp = VFSTOMSDOSFS(fdvp->v_mount); 851 852 /* 853 * Check for cross-device rename. 854 */ 855 if ((fvp->v_mount != tdvp->v_mount) || 856 (tvp && (fvp->v_mount != tvp->v_mount))) { 857 error = EXDEV; 858 abortit: 859 VOP_ABORTOP(tdvp, tcnp); 860 if (tdvp == tvp) 861 vrele(tdvp); 862 else 863 vput(tdvp); 864 if (tvp) 865 vput(tvp); 866 VOP_ABORTOP(fdvp, fcnp); 867 vrele(fdvp); 868 vrele(fvp); 869 return (error); 870 } 871 872 /* 873 * If source and dest are the same, do nothing. 874 */ 875 if (tvp == fvp) { 876 error = 0; 877 goto abortit; 878 } 879 880 /* 881 * XXX: This can deadlock since we hold tdvp/tvp locked. 882 * But I'm not going to fix it now. 883 */ 884 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 885 goto abortit; 886 dp = VTODE(fdvp); 887 ip = VTODE(fvp); 888 889 /* 890 * Be sure we are not renaming ".", "..", or an alias of ".". This 891 * leads to a crippled directory tree. It's pretty tough to do a 892 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 893 * doesn't work if the ".." entry is missing. 894 */ 895 if (ip->de_Attributes & ATTR_DIRECTORY) { 896 /* 897 * Avoid ".", "..", and aliases of "." for obvious reasons. 898 */ 899 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 900 dp == ip || 901 (fcnp->cn_flags & ISDOTDOT) || 902 (tcnp->cn_flags & ISDOTDOT) || 903 (ip->de_flag & DE_RENAME)) { 904 VOP_UNLOCK(fvp); 905 error = EINVAL; 906 goto abortit; 907 } 908 ip->de_flag |= DE_RENAME; 909 doingdirectory++; 910 } 911 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 912 913 fstrans_start(mp, FSTRANS_SHARED); 914 /* 915 * When the target exists, both the directory 916 * and target vnodes are returned locked. 917 */ 918 dp = VTODE(tdvp); 919 xp = tvp ? VTODE(tvp) : NULL; 920 /* 921 * Remember direntry place to use for destination 922 */ 923 to_diroffset = dp->de_fndoffset; 924 to_count = dp->de_fndcnt; 925 926 /* 927 * If ".." must be changed (ie the directory gets a new 928 * parent) then the source directory must not be in the 929 * directory hierarchy above the target, as this would 930 * orphan everything below the source directory. Also 931 * the user must have write permission in the source so 932 * as to be able to change "..". We must repeat the call 933 * to namei, as the parent directory is unlocked by the 934 * call to doscheckpath(). 935 */ 936 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 937 VOP_UNLOCK(fvp); 938 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 939 newparent = 1; 940 941 if (doingdirectory && newparent) { 942 if (error) /* write access check above */ 943 goto tdvpbad; 944 if (xp != NULL) 945 vput(tvp); 946 tvp = NULL; 947 /* 948 * doscheckpath() vput()'s tdvp (dp == VTODE(tdvp)), 949 * so we have to get an extra ref to it first, and 950 * because it's been unlocked we need to do a relookup 951 * afterwards in case tvp has changed. 952 */ 953 vref(tdvp); 954 if ((error = doscheckpath(ip, dp)) != 0) 955 goto bad; 956 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 957 if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) { 958 VOP_UNLOCK(tdvp); 959 goto bad; 960 } 961 dp = VTODE(tdvp); 962 xp = tvp ? VTODE(tvp) : NULL; 963 } 964 965 if (xp != NULL) { 966 /* 967 * Target must be empty if a directory and have no links 968 * to it. Also, ensure source and target are compatible 969 * (both directories, or both not directories). 970 */ 971 if (xp->de_Attributes & ATTR_DIRECTORY) { 972 if (!dosdirempty(xp)) { 973 error = ENOTEMPTY; 974 goto tdvpbad; 975 } 976 if (!doingdirectory) { 977 error = ENOTDIR; 978 goto tdvpbad; 979 } 980 } else if (doingdirectory) { 981 error = EISDIR; 982 goto tdvpbad; 983 } 984 if ((error = removede(dp, xp)) != 0) 985 goto tdvpbad; 986 VN_KNOTE(tdvp, NOTE_WRITE); 987 VN_KNOTE(tvp, NOTE_DELETE); 988 cache_purge(tvp); 989 vput(tvp); 990 tvp = NULL; 991 xp = NULL; 992 } 993 994 /* 995 * Convert the filename in tcnp into a dos filename. We copy this 996 * into the denode and directory entry for the destination 997 * file/directory. 998 */ 999 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) { 1000 fstrans_done(mp); 1001 goto abortit; 1002 } 1003 1004 /* 1005 * Since from wasn't locked at various places above, 1006 * have to do a relookup here. 1007 */ 1008 fcnp->cn_flags &= ~MODMASK; 1009 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1010 VOP_UNLOCK(tdvp); 1011 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1012 if ((error = relookup(fdvp, &fvp, fcnp, 0))) { 1013 VOP_UNLOCK(fdvp); 1014 vrele(ap->a_fvp); 1015 vrele(tdvp); 1016 fstrans_done(mp); 1017 return (error); 1018 } 1019 if (fvp == NULL) { 1020 /* 1021 * From name has disappeared. 1022 */ 1023 if (doingdirectory) 1024 panic("rename: lost dir entry"); 1025 vput(fdvp); 1026 vrele(ap->a_fvp); 1027 vrele(tdvp); 1028 fstrans_done(mp); 1029 return 0; 1030 } 1031 VOP_UNLOCK(fdvp); 1032 xp = VTODE(fvp); 1033 zp = VTODE(fdvp); 1034 from_diroffset = zp->de_fndoffset; 1035 1036 /* 1037 * Ensure that the directory entry still exists and has not 1038 * changed till now. If the source is a file the entry may 1039 * have been unlinked or renamed. In either case there is 1040 * no further work to be done. If the source is a directory 1041 * then it cannot have been rmdir'ed or renamed; this is 1042 * prohibited by the DE_RENAME flag. 1043 */ 1044 if (xp != ip) { 1045 if (doingdirectory) 1046 panic("rename: lost dir entry"); 1047 vrele(ap->a_fvp); 1048 xp = NULL; 1049 } else { 1050 vrele(fvp); 1051 xp = NULL; 1052 1053 /* 1054 * First write a new entry in the destination 1055 * directory and mark the entry in the source directory 1056 * as deleted. Then move the denode to the correct hash 1057 * chain for its new location in the filesystem. And, if 1058 * we moved a directory, then update its .. entry to point 1059 * to the new parent directory. 1060 */ 1061 memcpy(oldname, ip->de_Name, 11); 1062 memcpy(ip->de_Name, toname, 11); /* update denode */ 1063 dp->de_fndoffset = to_diroffset; 1064 dp->de_fndcnt = to_count; 1065 error = createde(ip, dp, (struct denode **)0, tcnp); 1066 if (error) { 1067 memcpy(ip->de_Name, oldname, 11); 1068 VOP_UNLOCK(fvp); 1069 goto bad; 1070 } 1071 ip->de_refcnt++; 1072 zp->de_fndoffset = from_diroffset; 1073 if ((error = removede(zp, ip)) != 0) { 1074 /* XXX should really panic here, fs is corrupt */ 1075 VOP_UNLOCK(fvp); 1076 goto bad; 1077 } 1078 cache_purge(fvp); 1079 if (!doingdirectory) { 1080 struct denode_key old_key = ip->de_key; 1081 struct denode_key new_key = ip->de_key; 1082 1083 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1084 &new_key.dk_dirclust, 0); 1085 if (error) { 1086 /* XXX should really panic here, fs is corrupt */ 1087 VOP_UNLOCK(fvp); 1088 goto bad; 1089 } 1090 new_key.dk_diroffset = to_diroffset; 1091 if (new_key.dk_dirclust != MSDOSFSROOT) 1092 new_key.dk_diroffset &= pmp->pm_crbomask; 1093 vcache_rekey_enter(pmp->pm_mountp, fvp, &old_key, 1094 sizeof(old_key), &new_key, sizeof(new_key)); 1095 ip->de_key = new_key; 1096 vcache_rekey_exit(pmp->pm_mountp, fvp, &old_key, 1097 sizeof(old_key), &ip->de_key, sizeof(ip->de_key)); 1098 } 1099 } 1100 1101 /* 1102 * If we moved a directory to a new parent directory, then we must 1103 * fixup the ".." entry in the moved directory. 1104 */ 1105 if (doingdirectory && newparent) { 1106 cn = ip->de_StartCluster; 1107 if (cn == MSDOSFSROOT) { 1108 /* this should never happen */ 1109 panic("msdosfs_rename: updating .. in root directory?"); 1110 } else 1111 bn = cntobn(pmp, cn); 1112 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1113 pmp->pm_bpcluster, B_MODIFY, &bp); 1114 if (error) { 1115 /* XXX should really panic here, fs is corrupt */ 1116 VOP_UNLOCK(fvp); 1117 goto bad; 1118 } 1119 dotdotp = (struct direntry *)bp->b_data + 1; 1120 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1121 if (FAT32(pmp)) { 1122 putushort(dotdotp->deHighClust, 1123 dp->de_StartCluster >> 16); 1124 } else { 1125 putushort(dotdotp->deHighClust, 0); 1126 } 1127 if ((error = bwrite(bp)) != 0) { 1128 /* XXX should really panic here, fs is corrupt */ 1129 VOP_UNLOCK(fvp); 1130 goto bad; 1131 } 1132 } 1133 1134 VN_KNOTE(fvp, NOTE_RENAME); 1135 VOP_UNLOCK(fvp); 1136 bad: 1137 if (tvp) 1138 vput(tvp); 1139 vrele(tdvp); 1140 ip->de_flag &= ~DE_RENAME; 1141 vrele(fdvp); 1142 vrele(fvp); 1143 fstrans_done(mp); 1144 return (error); 1145 1146 /* XXX: uuuh */ 1147 tdvpbad: 1148 VOP_UNLOCK(tdvp); 1149 goto bad; 1150 } 1151 1152 static const struct { 1153 struct direntry dot; 1154 struct direntry dotdot; 1155 } dosdirtemplate = { 1156 { ". ", " ", /* the . entry */ 1157 ATTR_DIRECTORY, /* file attribute */ 1158 0, /* reserved */ 1159 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1160 { 0, 0 }, /* access date */ 1161 { 0, 0 }, /* high bits of start cluster */ 1162 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1163 { 0, 0 }, /* startcluster */ 1164 { 0, 0, 0, 0 } /* filesize */ 1165 }, 1166 { ".. ", " ", /* the .. entry */ 1167 ATTR_DIRECTORY, /* file attribute */ 1168 0, /* reserved */ 1169 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1170 { 0, 0 }, /* access date */ 1171 { 0, 0 }, /* high bits of start cluster */ 1172 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1173 { 0, 0 }, /* startcluster */ 1174 { 0, 0, 0, 0 } /* filesize */ 1175 } 1176 }; 1177 1178 int 1179 msdosfs_mkdir(void *v) 1180 { 1181 struct vop_mkdir_v3_args /* { 1182 struct vnode *a_dvp; 1183 struvt vnode **a_vpp; 1184 struvt componentname *a_cnp; 1185 struct vattr *a_vap; 1186 } */ *ap = v; 1187 struct componentname *cnp = ap->a_cnp; 1188 struct denode ndirent; 1189 struct denode *dep; 1190 struct denode *pdep = VTODE(ap->a_dvp); 1191 int error; 1192 int bn; 1193 u_long newcluster, pcl; 1194 daddr_t lbn; 1195 struct direntry *denp; 1196 struct msdosfsmount *pmp = pdep->de_pmp; 1197 struct buf *bp; 1198 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1199 1200 fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); 1201 /* 1202 * If this is the root directory and there is no space left we 1203 * can't do anything. This is because the root directory can not 1204 * change size. 1205 */ 1206 if (pdep->de_StartCluster == MSDOSFSROOT 1207 && pdep->de_fndoffset >= pdep->de_FileSize) { 1208 error = ENOSPC; 1209 goto bad2; 1210 } 1211 1212 /* 1213 * Allocate a cluster to hold the about to be created directory. 1214 */ 1215 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1216 if (error) 1217 goto bad2; 1218 1219 memset(&ndirent, 0, sizeof(ndirent)); 1220 ndirent.de_pmp = pmp; 1221 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1222 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1223 1224 /* 1225 * Now fill the cluster with the "." and ".." entries. And write 1226 * the cluster to disk. This way it is there for the parent 1227 * directory to be pointing at if there were a crash. 1228 */ 1229 bn = cntobn(pmp, newcluster); 1230 lbn = de_bn2kb(pmp, bn); 1231 /* always succeeds */ 1232 bp = getblk(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 0, 0); 1233 memset(bp->b_data, 0, pmp->pm_bpcluster); 1234 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1235 denp = (struct direntry *)bp->b_data; 1236 putushort(denp[0].deStartCluster, newcluster); 1237 putushort(denp[0].deCDate, ndirent.de_CDate); 1238 putushort(denp[0].deCTime, ndirent.de_CTime); 1239 denp[0].deCHundredth = ndirent.de_CHun; 1240 putushort(denp[0].deADate, ndirent.de_ADate); 1241 putushort(denp[0].deMDate, ndirent.de_MDate); 1242 putushort(denp[0].deMTime, ndirent.de_MTime); 1243 pcl = pdep->de_StartCluster; 1244 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1245 pcl = 0; 1246 putushort(denp[1].deStartCluster, pcl); 1247 putushort(denp[1].deCDate, ndirent.de_CDate); 1248 putushort(denp[1].deCTime, ndirent.de_CTime); 1249 denp[1].deCHundredth = ndirent.de_CHun; 1250 putushort(denp[1].deADate, ndirent.de_ADate); 1251 putushort(denp[1].deMDate, ndirent.de_MDate); 1252 putushort(denp[1].deMTime, ndirent.de_MTime); 1253 if (FAT32(pmp)) { 1254 putushort(denp[0].deHighClust, newcluster >> 16); 1255 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1256 } else { 1257 putushort(denp[0].deHighClust, 0); 1258 putushort(denp[1].deHighClust, 0); 1259 } 1260 1261 if (async) 1262 bdwrite(bp); 1263 else if ((error = bwrite(bp)) != 0) 1264 goto bad; 1265 1266 /* 1267 * Now build up a directory entry pointing to the newly allocated 1268 * cluster. This will be written to an empty slot in the parent 1269 * directory. 1270 */ 1271 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1272 goto bad; 1273 1274 ndirent.de_Attributes = ATTR_DIRECTORY; 1275 ndirent.de_StartCluster = newcluster; 1276 ndirent.de_FileSize = 0; 1277 ndirent.de_dev = pdep->de_dev; 1278 ndirent.de_devvp = pdep->de_devvp; 1279 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1280 goto bad; 1281 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1282 *ap->a_vpp = DETOV(dep); 1283 fstrans_done(ap->a_dvp->v_mount); 1284 return (0); 1285 1286 bad: 1287 clusterfree(pmp, newcluster, NULL); 1288 bad2: 1289 fstrans_done(ap->a_dvp->v_mount); 1290 return (error); 1291 } 1292 1293 int 1294 msdosfs_rmdir(void *v) 1295 { 1296 struct vop_rmdir_args /* { 1297 struct vnode *a_dvp; 1298 struct vnode *a_vp; 1299 struct componentname *a_cnp; 1300 } */ *ap = v; 1301 struct vnode *vp = ap->a_vp; 1302 struct vnode *dvp = ap->a_dvp; 1303 struct mount *mp = dvp->v_mount; 1304 struct componentname *cnp = ap->a_cnp; 1305 struct denode *ip, *dp; 1306 int error; 1307 1308 ip = VTODE(vp); 1309 dp = VTODE(dvp); 1310 /* 1311 * No rmdir "." please. 1312 */ 1313 if (dp == ip) { 1314 vrele(dvp); 1315 vput(vp); 1316 return (EINVAL); 1317 } 1318 fstrans_start(mp, FSTRANS_SHARED); 1319 /* 1320 * Verify the directory is empty (and valid). 1321 * (Rmdir ".." won't be valid since 1322 * ".." will contain a reference to 1323 * the current directory and thus be 1324 * non-empty.) 1325 */ 1326 error = 0; 1327 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1328 error = ENOTEMPTY; 1329 goto out; 1330 } 1331 /* 1332 * Delete the entry from the directory. For dos filesystems this 1333 * gets rid of the directory entry on disk, the in memory copy 1334 * still exists but the de_refcnt is <= 0. This prevents it from 1335 * being found by deget(). When the vput() on dep is done we give 1336 * up access and eventually msdosfs_reclaim() will be called which 1337 * will remove it from the denode cache. 1338 */ 1339 if ((error = removede(dp, ip)) != 0) 1340 goto out; 1341 /* 1342 * This is where we decrement the link count in the parent 1343 * directory. Since dos filesystems don't do this we just purge 1344 * the name cache and let go of the parent directory denode. 1345 */ 1346 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1347 cache_purge(dvp); 1348 vput(dvp); 1349 dvp = NULL; 1350 /* 1351 * Truncate the directory that is being deleted. 1352 */ 1353 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred); 1354 cache_purge(vp); 1355 out: 1356 VN_KNOTE(vp, NOTE_DELETE); 1357 if (dvp) 1358 vput(dvp); 1359 vput(vp); 1360 fstrans_done(mp); 1361 return (error); 1362 } 1363 1364 int 1365 msdosfs_readdir(void *v) 1366 { 1367 struct vop_readdir_args /* { 1368 struct vnode *a_vp; 1369 struct uio *a_uio; 1370 kauth_cred_t a_cred; 1371 int *a_eofflag; 1372 off_t **a_cookies; 1373 int *a_ncookies; 1374 } */ *ap = v; 1375 int error = 0; 1376 int diff; 1377 long n; 1378 int blsize; 1379 long on; 1380 long lost; 1381 long count; 1382 u_long cn; 1383 ino_t fileno; 1384 u_long dirsperblk; 1385 long bias = 0; 1386 daddr_t bn, lbn; 1387 struct buf *bp; 1388 struct denode *dep = VTODE(ap->a_vp); 1389 struct msdosfsmount *pmp = dep->de_pmp; 1390 struct direntry *dentp; 1391 struct dirent *dirbuf; 1392 struct uio *uio = ap->a_uio; 1393 off_t *cookies = NULL; 1394 int ncookies = 0, nc = 0; 1395 off_t offset, uio_off; 1396 int chksum = -1; 1397 uint16_t namlen; 1398 1399 #ifdef MSDOSFS_DEBUG 1400 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1401 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1402 #endif 1403 1404 /* 1405 * msdosfs_readdir() won't operate properly on regular files since 1406 * it does i/o only with the filesystem vnode, and hence can 1407 * retrieve the wrong block from the buffer cache for a plain file. 1408 * So, fail attempts to readdir() on a plain file. 1409 */ 1410 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1411 return (ENOTDIR); 1412 1413 /* 1414 * If the user buffer is smaller than the size of one dos directory 1415 * entry or the file offset is not a multiple of the size of a 1416 * directory entry, then we fail the read. 1417 */ 1418 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1419 offset = uio->uio_offset; 1420 if (count < sizeof(struct direntry) || 1421 (offset & (sizeof(struct direntry) - 1))) 1422 return (EINVAL); 1423 lost = uio->uio_resid - count; 1424 uio->uio_resid = count; 1425 uio_off = uio->uio_offset; 1426 1427 fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED); 1428 1429 /* Allocate a temporary dirent buffer. */ 1430 dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO); 1431 1432 if (ap->a_ncookies) { 1433 nc = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0); 1434 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1435 *ap->a_cookies = cookies; 1436 } 1437 1438 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1439 1440 /* 1441 * If they are reading from the root directory then, we simulate 1442 * the . and .. entries since these don't exist in the root 1443 * directory. We also set the offset bias to make up for having to 1444 * simulate these entries. By this I mean that at file offset 64 we 1445 * read the first entry in the root directory that lives on disk. 1446 */ 1447 if (dep->de_StartCluster == MSDOSFSROOT 1448 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1449 #if 0 1450 printf("msdosfs_readdir(): going after . or .. in root dir, " 1451 "offset %" PRIu64 "\n", offset); 1452 #endif 1453 bias = 2 * sizeof(struct direntry); 1454 if (offset < bias) { 1455 for (n = (int)offset / sizeof(struct direntry); 1456 n < 2; n++) { 1457 if (FAT32(pmp)) 1458 dirbuf->d_fileno = cntobn(pmp, 1459 (ino_t)pmp->pm_rootdirblk) 1460 * dirsperblk; 1461 else 1462 dirbuf->d_fileno = 1; 1463 dirbuf->d_type = DT_DIR; 1464 switch (n) { 1465 case 0: 1466 dirbuf->d_namlen = 1; 1467 strlcpy(dirbuf->d_name, ".", 1468 sizeof(dirbuf->d_name)); 1469 break; 1470 case 1: 1471 dirbuf->d_namlen = 2; 1472 strlcpy(dirbuf->d_name, "..", 1473 sizeof(dirbuf->d_name)); 1474 break; 1475 } 1476 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1477 if (uio->uio_resid < dirbuf->d_reclen) 1478 goto out; 1479 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1480 if (error) 1481 goto out; 1482 offset += sizeof(struct direntry); 1483 uio_off = offset; 1484 if (cookies) { 1485 *cookies++ = offset; 1486 ncookies++; 1487 if (ncookies >= nc) 1488 goto out; 1489 } 1490 } 1491 } 1492 } 1493 1494 while (uio->uio_resid > 0) { 1495 lbn = de_cluster(pmp, offset - bias); 1496 on = (offset - bias) & pmp->pm_crbomask; 1497 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1498 diff = dep->de_FileSize - (offset - bias); 1499 if (diff <= 0) 1500 break; 1501 n = MIN(n, diff); 1502 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1503 break; 1504 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1505 0, &bp); 1506 if (error) { 1507 goto bad; 1508 } 1509 n = MIN(n, blsize - bp->b_resid); 1510 1511 /* 1512 * Convert from dos directory entries to fs-independent 1513 * directory entries. 1514 */ 1515 for (dentp = (struct direntry *)((char *)bp->b_data + on); 1516 (char *)dentp < (char *)bp->b_data + on + n; 1517 dentp++, offset += sizeof(struct direntry)) { 1518 #if 0 1519 1520 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1521 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1522 #endif 1523 /* 1524 * If this is an unused entry, we can stop. 1525 */ 1526 if (dentp->deName[0] == SLOT_EMPTY) { 1527 brelse(bp, 0); 1528 goto out; 1529 } 1530 /* 1531 * Skip deleted entries. 1532 */ 1533 if (dentp->deName[0] == SLOT_DELETED) { 1534 chksum = -1; 1535 continue; 1536 } 1537 1538 /* 1539 * Handle Win95 long directory entries 1540 */ 1541 if (dentp->deAttributes == ATTR_WIN95) { 1542 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1543 continue; 1544 chksum = win2unixfn((struct winentry *)dentp, 1545 dirbuf, chksum, &namlen, 1546 pmp->pm_flags & MSDOSFSMNT_UTF8); 1547 if (chksum != -1) 1548 dirbuf->d_namlen = namlen; 1549 continue; 1550 } 1551 1552 /* 1553 * Skip volume labels 1554 */ 1555 if (dentp->deAttributes & ATTR_VOLUME) { 1556 chksum = -1; 1557 continue; 1558 } 1559 /* 1560 * This computation of d_fileno must match 1561 * the computation of va_fileid in 1562 * msdosfs_getattr. 1563 */ 1564 if (dentp->deAttributes & ATTR_DIRECTORY) { 1565 fileno = getushort(dentp->deStartCluster); 1566 if (FAT32(pmp)) 1567 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1568 /* if this is the root directory */ 1569 if (fileno == MSDOSFSROOT) 1570 if (FAT32(pmp)) 1571 fileno = cntobn(pmp, 1572 (ino_t)pmp->pm_rootdirblk) 1573 * dirsperblk; 1574 else 1575 fileno = 1; 1576 else 1577 fileno = cntobn(pmp, fileno) * dirsperblk; 1578 dirbuf->d_fileno = fileno; 1579 dirbuf->d_type = DT_DIR; 1580 } else { 1581 dirbuf->d_fileno = 1582 offset / sizeof(struct direntry); 1583 dirbuf->d_type = DT_REG; 1584 } 1585 if (chksum != winChksum(dentp->deName)) 1586 dirbuf->d_namlen = dos2unixfn(dentp->deName, 1587 (u_char *)dirbuf->d_name, 1588 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1589 else 1590 dirbuf->d_name[dirbuf->d_namlen] = 0; 1591 namlen = dirbuf->d_namlen; 1592 chksum = -1; 1593 dirbuf->d_reclen = _DIRENT_SIZE(dirbuf); 1594 if (uio->uio_resid < dirbuf->d_reclen) { 1595 brelse(bp, 0); 1596 goto out; 1597 } 1598 error = uiomove(dirbuf, dirbuf->d_reclen, uio); 1599 if (error) { 1600 brelse(bp, 0); 1601 goto out; 1602 } 1603 uio_off = offset + sizeof(struct direntry); 1604 if (cookies) { 1605 *cookies++ = offset + sizeof(struct direntry); 1606 ncookies++; 1607 if (ncookies >= nc) { 1608 brelse(bp, 0); 1609 goto out; 1610 } 1611 } 1612 } 1613 brelse(bp, 0); 1614 } 1615 1616 out: 1617 uio->uio_offset = uio_off; 1618 uio->uio_resid += lost; 1619 if (dep->de_FileSize - (offset - bias) <= 0) 1620 *ap->a_eofflag = 1; 1621 else 1622 *ap->a_eofflag = 0; 1623 1624 if (ap->a_ncookies) { 1625 if (error) { 1626 free(*ap->a_cookies, M_TEMP); 1627 *ap->a_ncookies = 0; 1628 *ap->a_cookies = NULL; 1629 } else 1630 *ap->a_ncookies = ncookies; 1631 } 1632 1633 bad: 1634 free(dirbuf, M_MSDOSFSTMP); 1635 fstrans_done(ap->a_vp->v_mount); 1636 return (error); 1637 } 1638 1639 /* 1640 * vp - address of vnode file the file 1641 * bn - which cluster we are interested in mapping to a filesystem block number. 1642 * vpp - returns the vnode for the block special file holding the filesystem 1643 * containing the file of interest 1644 * bnp - address of where to return the filesystem relative block number 1645 */ 1646 int 1647 msdosfs_bmap(void *v) 1648 { 1649 struct vop_bmap_args /* { 1650 struct vnode *a_vp; 1651 daddr_t a_bn; 1652 struct vnode **a_vpp; 1653 daddr_t *a_bnp; 1654 int *a_runp; 1655 } */ *ap = v; 1656 struct denode *dep = VTODE(ap->a_vp); 1657 int run, maxrun; 1658 daddr_t runbn; 1659 int status; 1660 1661 if (ap->a_vpp != NULL) 1662 *ap->a_vpp = dep->de_devvp; 1663 if (ap->a_bnp == NULL) 1664 return (0); 1665 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1666 1667 /* 1668 * From FreeBSD: 1669 * A little kludgy, but we loop calling pcbmap until we 1670 * reach the end of the contiguous piece, or reach MAXPHYS. 1671 * Since it reduces disk I/Os, the "wasted" CPU is put to 1672 * good use (4 to 5 fold sequential read I/O improvement on USB 1673 * drives). 1674 */ 1675 if (ap->a_runp != NULL) { 1676 /* taken from ufs_bmap */ 1677 maxrun = ulmin(MAXPHYS / dep->de_pmp->pm_bpcluster - 1, 1678 dep->de_pmp->pm_maxcluster - ap->a_bn); 1679 for (run = 1; run <= maxrun; run++) { 1680 if (pcbmap(dep, ap->a_bn + run, &runbn, NULL, NULL) 1681 != 0 || runbn != 1682 *ap->a_bnp + de_cn2bn(dep->de_pmp, run)) 1683 break; 1684 } 1685 *ap->a_runp = run - 1; 1686 } 1687 1688 /* 1689 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1690 */ 1691 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1692 return status; 1693 } 1694 1695 int 1696 msdosfs_strategy(void *v) 1697 { 1698 struct vop_strategy_args /* { 1699 struct vnode *a_vp; 1700 struct buf *a_bp; 1701 } */ *ap = v; 1702 struct vnode *vp = ap->a_vp; 1703 struct buf *bp = ap->a_bp; 1704 struct denode *dep = VTODE(bp->b_vp); 1705 int error = 0; 1706 1707 if (vp->v_type == VBLK || vp->v_type == VCHR) 1708 panic("msdosfs_strategy: spec"); 1709 /* 1710 * If we don't already know the filesystem relative block number 1711 * then get it using pcbmap(). If pcbmap() returns the block 1712 * number as -1 then we've got a hole in the file. DOS filesystems 1713 * don't allow files with holes, so we shouldn't ever see this. 1714 */ 1715 if (bp->b_blkno == bp->b_lblkno) { 1716 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1717 &bp->b_blkno, 0, 0); 1718 if (error) 1719 bp->b_blkno = -1; 1720 if (bp->b_blkno == -1) 1721 clrbuf(bp); 1722 else 1723 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1724 } 1725 if (bp->b_blkno == -1) { 1726 biodone(bp); 1727 return (error); 1728 } 1729 1730 /* 1731 * Read/write the block from/to the disk that contains the desired 1732 * file block. 1733 */ 1734 1735 vp = dep->de_devvp; 1736 return (VOP_STRATEGY(vp, bp)); 1737 } 1738 1739 int 1740 msdosfs_print(void *v) 1741 { 1742 struct vop_print_args /* { 1743 struct vnode *vp; 1744 } */ *ap = v; 1745 struct denode *dep = VTODE(ap->a_vp); 1746 1747 printf( 1748 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1749 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1750 printf(" dev %llu, %llu ", (unsigned long long)major(dep->de_dev), 1751 (unsigned long long)minor(dep->de_dev)); 1752 printf("\n"); 1753 return (0); 1754 } 1755 1756 int 1757 msdosfs_advlock(void *v) 1758 { 1759 struct vop_advlock_args /* { 1760 struct vnode *a_vp; 1761 void *a_id; 1762 int a_op; 1763 struct flock *a_fl; 1764 int a_flags; 1765 } */ *ap = v; 1766 struct denode *dep = VTODE(ap->a_vp); 1767 1768 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1769 } 1770 1771 int 1772 msdosfs_pathconf(void *v) 1773 { 1774 struct vop_pathconf_args /* { 1775 struct vnode *a_vp; 1776 int a_name; 1777 register_t *a_retval; 1778 } */ *ap = v; 1779 1780 switch (ap->a_name) { 1781 case _PC_LINK_MAX: 1782 *ap->a_retval = 1; 1783 return (0); 1784 case _PC_NAME_MAX: 1785 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1786 return (0); 1787 case _PC_PATH_MAX: 1788 *ap->a_retval = PATH_MAX; 1789 return (0); 1790 case _PC_CHOWN_RESTRICTED: 1791 *ap->a_retval = 1; 1792 return (0); 1793 case _PC_NO_TRUNC: 1794 *ap->a_retval = 1; 1795 return (0); 1796 case _PC_SYNC_IO: 1797 *ap->a_retval = 1; 1798 return (0); 1799 case _PC_FILESIZEBITS: 1800 *ap->a_retval = 32; 1801 return (0); 1802 default: 1803 return (EINVAL); 1804 } 1805 /* NOTREACHED */ 1806 } 1807 1808 int 1809 msdosfs_fsync(void *v) 1810 { 1811 struct vop_fsync_args /* { 1812 struct vnode *a_vp; 1813 kauth_cred_t a_cred; 1814 int a_flags; 1815 off_t offlo; 1816 off_t offhi; 1817 } */ *ap = v; 1818 struct vnode *vp = ap->a_vp; 1819 int wait; 1820 int error; 1821 1822 fstrans_start(vp->v_mount, FSTRANS_LAZY); 1823 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1824 error = vflushbuf(vp, ap->a_flags); 1825 if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) 1826 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1827 1828 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1829 struct denode *dep = VTODE(vp); 1830 struct vnode *devvp = dep->de_devvp; 1831 1832 int l = 0; 1833 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1834 curlwp->l_cred); 1835 } 1836 fstrans_done(vp->v_mount); 1837 1838 return (error); 1839 } 1840 1841 void 1842 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1843 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1844 { 1845 struct timespec *ts = NULL, tsb; 1846 1847 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1848 /* XXX just call getnanotime early and use result if needed? */ 1849 dep->de_flag |= DE_MODIFIED; 1850 if (dep->de_flag & DE_UPDATE) { 1851 if (mod == NULL) { 1852 getnanotime(&tsb); 1853 mod = ts = &tsb; 1854 } 1855 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1856 dep->de_Attributes |= ATTR_ARCHIVE; 1857 } 1858 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1859 if (dep->de_flag & DE_ACCESS) { 1860 if (acc == NULL) 1861 acc = ts == NULL ? 1862 (getnanotime(&tsb), ts = &tsb) : ts; 1863 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1864 } 1865 if (dep->de_flag & DE_CREATE) { 1866 if (cre == NULL) 1867 cre = ts == NULL ? 1868 (getnanotime(&tsb), ts = &tsb) : ts; 1869 unix2dostime(cre, gmtoff, &dep->de_CDate, 1870 &dep->de_CTime, &dep->de_CHun); 1871 } 1872 } 1873 1874 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1875 } 1876 1877 /* Global vfs data structures for msdosfs */ 1878 int (**msdosfs_vnodeop_p)(void *); 1879 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1880 { &vop_default_desc, vn_default_error }, 1881 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1882 { &vop_create_desc, msdosfs_create }, /* create */ 1883 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 1884 { &vop_open_desc, genfs_nullop }, /* open */ 1885 { &vop_close_desc, msdosfs_close }, /* close */ 1886 { &vop_access_desc, msdosfs_access }, /* access */ 1887 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1888 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1889 { &vop_read_desc, msdosfs_read }, /* read */ 1890 { &vop_write_desc, msdosfs_write }, /* write */ 1891 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 1892 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 1893 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1894 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1895 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1896 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1897 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1898 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1899 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1900 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1901 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1902 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 1903 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1904 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1905 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1906 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 1907 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1908 { &vop_readlink_desc, genfs_einval }, /* readlink */ 1909 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1910 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1911 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1912 { &vop_lock_desc, genfs_lock }, /* lock */ 1913 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1914 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1915 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1916 { &vop_print_desc, msdosfs_print }, /* print */ 1917 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1918 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1919 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1920 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1921 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1922 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1923 { NULL, NULL } 1924 }; 1925 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1926 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1927