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sys/fs/msdosfs/msdosfs_vnops.c
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1 /* $NetBSD: msdosfs_vnops.c,v 1.34.2.2 2008/02/01 14:50:26 riz 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 1.34.2.2 2008/02/01 14:50:26 riz Exp $"); 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/namei.h> 56 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 57 #include <sys/kernel.h> 58 #include <sys/file.h> /* define FWRITE ... */ 59 #include <sys/stat.h> 60 #include <sys/buf.h> 61 #include <sys/proc.h> 62 #include <sys/mount.h> 63 #include <sys/vnode.h> 64 #include <sys/signalvar.h> 65 #include <sys/malloc.h> 66 #include <sys/dirent.h> 67 #include <sys/lockf.h> 68 #include <sys/kauth.h> 69 70 #include <miscfs/genfs/genfs.h> 71 #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 72 73 #include <uvm/uvm_extern.h> 74 75 #include <fs/msdosfs/bpb.h> 76 #include <fs/msdosfs/direntry.h> 77 #include <fs/msdosfs/denode.h> 78 #include <fs/msdosfs/msdosfsmount.h> 79 #include <fs/msdosfs/fat.h> 80 81 /* 82 * Some general notes: 83 * 84 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 85 * read/written using the vnode for the filesystem. Blocks that represent 86 * the contents of a file are read/written using the vnode for the file 87 * (including directories when they are read/written as files). This 88 * presents problems for the dos filesystem because data that should be in 89 * an inode (if dos had them) resides in the directory itself. Since we 90 * must update directory entries without the benefit of having the vnode 91 * for the directory we must use the vnode for the filesystem. This means 92 * that when a directory is actually read/written (via read, write, or 93 * readdir, or seek) we must use the vnode for the filesystem instead of 94 * the vnode for the directory as would happen in ufs. This is to insure we 95 * retrieve the correct block from the buffer cache since the hash value is 96 * based upon the vnode address and the desired block number. 97 */ 98 99 /* 100 * Create a regular file. On entry the directory to contain the file being 101 * created is locked. We must release before we return. We must also free 102 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 103 * only if the SAVESTART bit in cn_flags is clear on success. 104 */ 105 int 106 msdosfs_create(v) 107 void *v; 108 { 109 struct vop_create_args /* { 110 struct vnode *a_dvp; 111 struct vnode **a_vpp; 112 struct componentname *a_cnp; 113 struct vattr *a_vap; 114 } */ *ap = v; 115 struct componentname *cnp = ap->a_cnp; 116 struct denode ndirent; 117 struct denode *dep; 118 struct denode *pdep = VTODE(ap->a_dvp); 119 int error; 120 121 #ifdef MSDOSFS_DEBUG 122 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 123 #endif 124 125 /* 126 * If this is the root directory and there is no space left we 127 * can't do anything. This is because the root directory can not 128 * change size. 129 */ 130 if (pdep->de_StartCluster == MSDOSFSROOT 131 && pdep->de_fndoffset >= pdep->de_FileSize) { 132 error = ENOSPC; 133 goto bad; 134 } 135 136 /* 137 * Create a directory entry for the file, then call createde() to 138 * have it installed. NOTE: DOS files are always executable. We 139 * use the absence of the owner write bit to make the file 140 * readonly. 141 */ 142 #ifdef DIAGNOSTIC 143 if ((cnp->cn_flags & HASBUF) == 0) 144 panic("msdosfs_create: no name"); 145 #endif 146 memset(&ndirent, 0, sizeof(ndirent)); 147 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 148 goto bad; 149 150 ndirent.de_Attributes = (ap->a_vap->va_mode & S_IWUSR) ? 151 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 152 ndirent.de_StartCluster = 0; 153 ndirent.de_FileSize = 0; 154 ndirent.de_dev = pdep->de_dev; 155 ndirent.de_devvp = pdep->de_devvp; 156 ndirent.de_pmp = pdep->de_pmp; 157 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 158 DETIMES(&ndirent, NULL, NULL, NULL, pdep->de_pmp->pm_gmtoff); 159 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 160 goto bad; 161 if ((cnp->cn_flags & SAVESTART) == 0) 162 PNBUF_PUT(cnp->cn_pnbuf); 163 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 164 vput(ap->a_dvp); 165 *ap->a_vpp = DETOV(dep); 166 return (0); 167 168 bad: 169 PNBUF_PUT(cnp->cn_pnbuf); 170 vput(ap->a_dvp); 171 return (error); 172 } 173 174 int 175 msdosfs_mknod(v) 176 void *v; 177 { 178 struct vop_mknod_args /* { 179 struct vnode *a_dvp; 180 struct vnode **a_vpp; 181 struct componentname *a_cnp; 182 struct vattr *a_vap; 183 } */ *ap = v; 184 185 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 186 vput(ap->a_dvp); 187 return (EINVAL); 188 } 189 190 int 191 msdosfs_open(void *v) 192 { 193 #if 0 194 struct vop_open_args /* { 195 struct vnode *a_vp; 196 int a_mode; 197 kauth_cred_t a_cred; 198 struct lwp *a_l; 199 } */ *ap; 200 #endif 201 202 return (0); 203 } 204 205 int 206 msdosfs_close(v) 207 void *v; 208 { 209 struct vop_close_args /* { 210 struct vnode *a_vp; 211 int a_fflag; 212 kauth_cred_t a_cred; 213 struct lwp *a_l; 214 } */ *ap = v; 215 struct vnode *vp = ap->a_vp; 216 struct denode *dep = VTODE(vp); 217 218 simple_lock(&vp->v_interlock); 219 if (vp->v_usecount > 1) 220 DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff); 221 simple_unlock(&vp->v_interlock); 222 return (0); 223 } 224 225 int 226 msdosfs_access(v) 227 void *v; 228 { 229 struct vop_access_args /* { 230 struct vnode *a_vp; 231 int a_mode; 232 kauth_cred_t a_cred; 233 struct lwp *a_l; 234 } */ *ap = v; 235 struct vnode *vp = ap->a_vp; 236 struct denode *dep = VTODE(vp); 237 struct msdosfsmount *pmp = dep->de_pmp; 238 mode_t mode = ap->a_mode; 239 240 /* 241 * Disallow write attempts on read-only file systems; 242 * unless the file is a socket, fifo, or a block or 243 * character device resident on the file system. 244 */ 245 if (mode & VWRITE) { 246 switch (vp->v_type) { 247 case VDIR: 248 case VLNK: 249 case VREG: 250 if (vp->v_mount->mnt_flag & MNT_RDONLY) 251 return (EROFS); 252 default: 253 break; 254 } 255 } 256 257 if ((dep->de_Attributes & ATTR_READONLY) == 0) 258 mode = S_IRWXU|S_IRWXG|S_IRWXO; 259 else 260 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 261 return (vaccess(ap->a_vp->v_type, 262 mode & (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask), 263 pmp->pm_uid, pmp->pm_gid, ap->a_mode, ap->a_cred)); 264 } 265 266 int 267 msdosfs_getattr(v) 268 void *v; 269 { 270 struct vop_getattr_args /* { 271 struct vnode *a_vp; 272 struct vattr *a_vap; 273 kauth_cred_t a_cred; 274 struct lwp *a_l; 275 } */ *ap = v; 276 struct denode *dep = VTODE(ap->a_vp); 277 struct msdosfsmount *pmp = dep->de_pmp; 278 struct vattr *vap = ap->a_vap; 279 mode_t mode; 280 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 281 ino_t fileid; 282 283 DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff); 284 vap->va_fsid = dep->de_dev; 285 /* 286 * The following computation of the fileid must be the same as that 287 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 288 * doesn't work. 289 */ 290 if (dep->de_Attributes & ATTR_DIRECTORY) { 291 fileid = cntobn(pmp, (ino_t)dep->de_StartCluster) * dirsperblk; 292 if (dep->de_StartCluster == MSDOSFSROOT) 293 fileid = 1; 294 } else { 295 fileid = cntobn(pmp, (ino_t)dep->de_dirclust) * dirsperblk; 296 if (dep->de_dirclust == MSDOSFSROOT) 297 fileid = roottobn(pmp, 0) * dirsperblk; 298 fileid += dep->de_diroffset / sizeof(struct direntry); 299 } 300 vap->va_fileid = fileid; 301 if ((dep->de_Attributes & ATTR_READONLY) == 0) 302 mode = S_IRWXU|S_IRWXG|S_IRWXO; 303 else 304 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 305 vap->va_mode = 306 mode & (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 307 vap->va_uid = pmp->pm_uid; 308 vap->va_gid = pmp->pm_gid; 309 vap->va_nlink = 1; 310 vap->va_rdev = 0; 311 vap->va_size = ap->a_vp->v_size; 312 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, pmp->pm_gmtoff, 313 &vap->va_mtime); 314 if (dep->de_pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 315 dos2unixtime(dep->de_ADate, 0, 0, pmp->pm_gmtoff, 316 &vap->va_atime); 317 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, 318 pmp->pm_gmtoff, &vap->va_ctime); 319 } else { 320 vap->va_atime = vap->va_mtime; 321 vap->va_ctime = vap->va_mtime; 322 } 323 vap->va_flags = 0; 324 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 325 vap->va_mode |= S_ARCH1; 326 vap->va_gen = 0; 327 vap->va_blocksize = pmp->pm_bpcluster; 328 vap->va_bytes = 329 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 330 vap->va_type = ap->a_vp->v_type; 331 return (0); 332 } 333 334 int 335 msdosfs_setattr(v) 336 void *v; 337 { 338 struct vop_setattr_args /* { 339 struct vnode *a_vp; 340 struct vattr *a_vap; 341 kauth_cred_t a_cred; 342 struct lwp *a_l; 343 } */ *ap = v; 344 int error = 0, de_changed = 0; 345 struct denode *dep = VTODE(ap->a_vp); 346 struct msdosfsmount *pmp = dep->de_pmp; 347 struct vnode *vp = ap->a_vp; 348 struct vattr *vap = ap->a_vap; 349 kauth_cred_t cred = ap->a_cred; 350 351 #ifdef MSDOSFS_DEBUG 352 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 353 ap->a_vp, vap, cred, ap->a_l); 354 #endif 355 /* 356 * Note we silently ignore uid or gid changes. 357 */ 358 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 359 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 360 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 361 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL) || 362 (vap->va_uid != VNOVAL && vap->va_uid != pmp->pm_uid) || 363 (vap->va_gid != VNOVAL && vap->va_gid != pmp->pm_gid)) { 364 #ifdef MSDOSFS_DEBUG 365 printf("msdosfs_setattr(): returning EINVAL\n"); 366 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %llx\n", 367 vap->va_type, vap->va_nlink, vap->va_fsid, 368 (unsigned long long)vap->va_fileid); 369 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 370 vap->va_blocksize, vap->va_rdev, (long long)vap->va_bytes, vap->va_gen); 371 #endif 372 return (EINVAL); 373 } 374 /* 375 * Silently ignore attributes modifications on directories. 376 */ 377 if (ap->a_vp->v_type == VDIR) 378 return 0; 379 380 if (vap->va_size != VNOVAL) { 381 if (vp->v_mount->mnt_flag & MNT_RDONLY) 382 return (EROFS); 383 error = detrunc(dep, (u_long)vap->va_size, 0, cred, ap->a_l); 384 if (error) 385 return (error); 386 de_changed = 1; 387 } 388 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 389 if (vp->v_mount->mnt_flag & MNT_RDONLY) 390 return (EROFS); 391 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 392 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 393 &ap->a_l->l_acflag)) && 394 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 395 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_l)))) 396 return (error); 397 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 398 vap->va_atime.tv_sec != VNOVAL) 399 unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL); 400 if (vap->va_mtime.tv_sec != VNOVAL) 401 unix2dostime(&vap->va_mtime, pmp->pm_gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 402 dep->de_Attributes |= ATTR_ARCHIVE; 403 dep->de_flag |= DE_MODIFIED; 404 de_changed = 1; 405 } 406 /* 407 * DOS files only have the ability to have their writability 408 * attribute set, so we use the owner write bit to set the readonly 409 * attribute. 410 */ 411 if (vap->va_mode != (mode_t)VNOVAL) { 412 if (vp->v_mount->mnt_flag & MNT_RDONLY) 413 return (EROFS); 414 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 415 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 416 &ap->a_l->l_acflag))) 417 return (error); 418 /* We ignore the read and execute bits. */ 419 if (vap->va_mode & S_IWUSR) 420 dep->de_Attributes &= ~ATTR_READONLY; 421 else 422 dep->de_Attributes |= ATTR_READONLY; 423 dep->de_flag |= DE_MODIFIED; 424 de_changed = 1; 425 } 426 /* 427 * Allow the `archived' bit to be toggled. 428 */ 429 if (vap->va_flags != VNOVAL) { 430 if (vp->v_mount->mnt_flag & MNT_RDONLY) 431 return (EROFS); 432 if (kauth_cred_geteuid(cred) != pmp->pm_uid && 433 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 434 &ap->a_l->l_acflag))) 435 return (error); 436 if (vap->va_flags & SF_ARCHIVED) 437 dep->de_Attributes &= ~ATTR_ARCHIVE; 438 else 439 dep->de_Attributes |= ATTR_ARCHIVE; 440 dep->de_flag |= DE_MODIFIED; 441 de_changed = 1; 442 } 443 444 if (de_changed) { 445 VN_KNOTE(vp, NOTE_ATTRIB); 446 return (deupdat(dep, 1)); 447 } else 448 return (0); 449 } 450 451 int 452 msdosfs_read(v) 453 void *v; 454 { 455 struct vop_read_args /* { 456 struct vnode *a_vp; 457 struct uio *a_uio; 458 int a_ioflag; 459 kauth_cred_t a_cred; 460 } */ *ap = v; 461 int error = 0, flags; 462 int64_t diff; 463 int blsize; 464 long n; 465 long on; 466 daddr_t lbn; 467 void *win; 468 vsize_t bytelen; 469 struct buf *bp; 470 struct vnode *vp = ap->a_vp; 471 struct denode *dep = VTODE(vp); 472 struct msdosfsmount *pmp = dep->de_pmp; 473 struct uio *uio = ap->a_uio; 474 475 /* 476 * If they didn't ask for any data, then we are done. 477 */ 478 479 if (uio->uio_resid == 0) 480 return (0); 481 if (uio->uio_offset < 0) 482 return (EINVAL); 483 if (uio->uio_offset >= dep->de_FileSize) 484 return (0); 485 486 if (vp->v_type == VREG) { 487 const int advice = IO_ADV_DECODE(ap->a_ioflag); 488 489 while (uio->uio_resid > 0) { 490 bytelen = MIN(dep->de_FileSize - uio->uio_offset, 491 uio->uio_resid); 492 493 if (bytelen == 0) 494 break; 495 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 496 &bytelen, advice, UBC_READ); 497 error = uiomove(win, bytelen, uio); 498 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 499 ubc_release(win, flags); 500 if (error) 501 break; 502 } 503 dep->de_flag |= DE_ACCESS; 504 goto out; 505 } 506 507 /* this loop is only for directories now */ 508 do { 509 lbn = de_cluster(pmp, uio->uio_offset); 510 on = uio->uio_offset & pmp->pm_crbomask; 511 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 512 if (uio->uio_offset >= dep->de_FileSize) 513 return (0); 514 /* file size (and hence diff) may be up to 4GB */ 515 diff = dep->de_FileSize - uio->uio_offset; 516 if (diff < n) 517 n = (long) diff; 518 519 /* convert cluster # to sector # */ 520 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 521 if (error) 522 return (error); 523 524 /* 525 * If we are operating on a directory file then be sure to 526 * do i/o with the vnode for the filesystem instead of the 527 * vnode for the directory. 528 */ 529 error = bread(pmp->pm_devvp, de_bn2kb(pmp, lbn), blsize, 530 NOCRED, &bp); 531 n = MIN(n, pmp->pm_bpcluster - bp->b_resid); 532 if (error) { 533 brelse(bp); 534 return (error); 535 } 536 error = uiomove(bp->b_data + on, (int) n, uio); 537 brelse(bp); 538 } while (error == 0 && uio->uio_resid > 0 && n != 0); 539 540 out: 541 if ((ap->a_ioflag & IO_SYNC) == IO_SYNC) 542 error = deupdat(dep, 1); 543 return (error); 544 } 545 546 /* 547 * Write data to a file or directory. 548 */ 549 int 550 msdosfs_write(v) 551 void *v; 552 { 553 struct vop_write_args /* { 554 struct vnode *a_vp; 555 struct uio *a_uio; 556 int a_ioflag; 557 kauth_cred_t a_cred; 558 } */ *ap = v; 559 int resid, flags, extended = 0; 560 int error = 0; 561 int ioflag = ap->a_ioflag; 562 u_long osize; 563 u_long count; 564 void *win; 565 vsize_t bytelen; 566 off_t oldoff; 567 struct uio *uio = ap->a_uio; 568 struct proc *p = curproc; 569 struct vnode *vp = ap->a_vp; 570 struct denode *dep = VTODE(vp); 571 struct msdosfsmount *pmp = dep->de_pmp; 572 kauth_cred_t cred = ap->a_cred; 573 boolean_t async; 574 575 #ifdef MSDOSFS_DEBUG 576 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 577 vp, uio, ioflag, cred); 578 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 579 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 580 #endif 581 582 switch (vp->v_type) { 583 case VREG: 584 if (ioflag & IO_APPEND) 585 uio->uio_offset = dep->de_FileSize; 586 break; 587 case VDIR: 588 return EISDIR; 589 default: 590 panic("msdosfs_write(): bad file type"); 591 } 592 593 if (uio->uio_offset < 0) 594 return (EINVAL); 595 596 if (uio->uio_resid == 0) 597 return (0); 598 599 /* Don't bother to try to write files larger than the fs limit */ 600 if (uio->uio_offset + uio->uio_resid > MSDOSFS_FILESIZE_MAX) 601 return (EFBIG); 602 603 /* 604 * If they've exceeded their filesize limit, tell them about it. 605 */ 606 if (((uio->uio_offset + uio->uio_resid) > 607 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 608 psignal(p, SIGXFSZ); 609 return (EFBIG); 610 } 611 612 /* 613 * If the offset we are starting the write at is beyond the end of 614 * the file, then they've done a seek. Unix filesystems allow 615 * files with holes in them, DOS doesn't so we must fill the hole 616 * with zeroed blocks. 617 */ 618 if (uio->uio_offset > dep->de_FileSize) { 619 if ((error = deextend(dep, uio->uio_offset, cred)) != 0) 620 return (error); 621 } 622 623 /* 624 * Remember some values in case the write fails. 625 */ 626 async = vp->v_mount->mnt_flag & MNT_ASYNC; 627 resid = uio->uio_resid; 628 osize = dep->de_FileSize; 629 630 /* 631 * If we write beyond the end of the file, extend it to its ultimate 632 * size ahead of the time to hopefully get a contiguous area. 633 */ 634 if (uio->uio_offset + resid > osize) { 635 count = de_clcount(pmp, uio->uio_offset + resid) - 636 de_clcount(pmp, osize); 637 if ((error = extendfile(dep, count, NULL, NULL, 0)) && 638 (error != ENOSPC || (ioflag & IO_UNIT))) 639 goto errexit; 640 641 dep->de_FileSize = uio->uio_offset + resid; 642 uvm_vnp_setsize(vp, dep->de_FileSize); 643 extended = 1; 644 } 645 646 do { 647 oldoff = uio->uio_offset; 648 bytelen = uio->uio_resid; 649 650 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, UVM_ADV_NORMAL, 651 UBC_WRITE); 652 error = uiomove(win, bytelen, uio); 653 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 654 ubc_release(win, flags); 655 if (error) 656 break; 657 658 /* 659 * flush what we just wrote if necessary. 660 * XXXUBC simplistic async flushing. 661 */ 662 663 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 664 simple_lock(&vp->v_interlock); 665 error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, 666 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 667 } 668 } while (error == 0 && uio->uio_resid > 0); 669 if (error == 0 && ioflag & IO_SYNC) { 670 simple_lock(&vp->v_interlock); 671 error = VOP_PUTPAGES(vp, trunc_page(oldoff), 672 round_page(oldoff + bytelen), PGO_CLEANIT | PGO_SYNCIO); 673 } 674 dep->de_flag |= DE_UPDATE; 675 676 /* 677 * If the write failed and they want us to, truncate the file back 678 * to the size it was before the write was attempted. 679 */ 680 errexit: 681 if (resid > uio->uio_resid) 682 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 683 if (error) { 684 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 685 uio->uio_offset -= resid - uio->uio_resid; 686 uio->uio_resid = resid; 687 } else if ((ioflag & IO_SYNC) == IO_SYNC) 688 error = deupdat(dep, 1); 689 KASSERT(vp->v_size == dep->de_FileSize); 690 return (error); 691 } 692 693 int 694 msdosfs_update(struct vnode *vp, const struct timespec *acc, 695 const struct timespec *mod, int flags) 696 { 697 struct buf *bp; 698 struct direntry *dirp; 699 struct denode *dep; 700 int error; 701 702 if (vp->v_mount->mnt_flag & MNT_RDONLY) 703 return (0); 704 dep = VTODE(vp); 705 DETIMES(dep, acc, mod, NULL, dep->de_pmp->pm_gmtoff); 706 if ((dep->de_flag & DE_MODIFIED) == 0) 707 return (0); 708 dep->de_flag &= ~DE_MODIFIED; 709 if (dep->de_Attributes & ATTR_DIRECTORY) 710 return (0); 711 if (dep->de_refcnt <= 0) 712 return (0); 713 error = readde(dep, &bp, &dirp); 714 if (error) 715 return (error); 716 DE_EXTERNALIZE(dirp, dep); 717 if (flags & (UPDATE_WAIT|UPDATE_DIROP)) 718 return (bwrite(bp)); 719 else { 720 bdwrite(bp); 721 return (0); 722 } 723 } 724 725 /* 726 * Flush the blocks of a file to disk. 727 * 728 * This function is worthless for vnodes that represent directories. Maybe we 729 * could just do a sync if they try an fsync on a directory file. 730 */ 731 int 732 msdosfs_remove(v) 733 void *v; 734 { 735 struct vop_remove_args /* { 736 struct vnode *a_dvp; 737 struct vnode *a_vp; 738 struct componentname *a_cnp; 739 } */ *ap = v; 740 struct denode *dep = VTODE(ap->a_vp); 741 struct denode *ddep = VTODE(ap->a_dvp); 742 int error; 743 744 if (ap->a_vp->v_type == VDIR) 745 error = EPERM; 746 else 747 error = removede(ddep, dep); 748 #ifdef MSDOSFS_DEBUG 749 printf("msdosfs_remove(), dep %p, v_usecount %d\n", 750 dep, ap->a_vp->v_usecount); 751 #endif 752 VN_KNOTE(ap->a_vp, NOTE_DELETE); 753 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 754 if (ddep == dep) 755 vrele(ap->a_vp); 756 else 757 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 758 * via vrele() */ 759 vput(ap->a_dvp); 760 return (error); 761 } 762 763 /* 764 * DOS filesystems don't know what links are. But since we already called 765 * msdosfs_lookup() with create and lockparent, the parent is locked so we 766 * have to free it before we return the error. 767 */ 768 int 769 msdosfs_link(v) 770 void *v; 771 { 772 struct vop_link_args /* { 773 struct vnode *a_dvp; 774 struct vnode *a_vp; 775 struct componentname *a_cnp; 776 } */ *ap = v; 777 778 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 779 vput(ap->a_dvp); 780 return (EOPNOTSUPP); 781 } 782 783 /* 784 * Renames on files require moving the denode to a new hash queue since the 785 * denode's location is used to compute which hash queue to put the file 786 * in. Unless it is a rename in place. For example "mv a b". 787 * 788 * What follows is the basic algorithm: 789 * 790 * if (file move) { 791 * if (dest file exists) { 792 * remove dest file 793 * } 794 * if (dest and src in same directory) { 795 * rewrite name in existing directory slot 796 * } else { 797 * write new entry in dest directory 798 * update offset and dirclust in denode 799 * move denode to new hash chain 800 * clear old directory entry 801 * } 802 * } else { 803 * directory move 804 * if (dest directory exists) { 805 * if (dest is not empty) { 806 * return ENOTEMPTY 807 * } 808 * remove dest directory 809 * } 810 * if (dest and src in same directory) { 811 * rewrite name in existing entry 812 * } else { 813 * be sure dest is not a child of src directory 814 * write entry in dest directory 815 * update "." and ".." in moved directory 816 * update offset and dirclust in denode 817 * move denode to new hash chain 818 * clear old directory entry for moved directory 819 * } 820 * } 821 * 822 * On entry: 823 * source's parent directory is unlocked 824 * source file or directory is unlocked 825 * destination's parent directory is locked 826 * destination file or directory is locked if it exists 827 * 828 * On exit: 829 * all denodes should be released 830 * 831 * Notes: 832 * I'm not sure how the memory containing the pathnames pointed at by the 833 * componentname structures is freed, there may be some memory bleeding 834 * for each rename done. 835 * 836 * --More-- Notes: 837 * This routine needs help. badly. 838 */ 839 int 840 msdosfs_rename(v) 841 void *v; 842 { 843 struct vop_rename_args /* { 844 struct vnode *a_fdvp; 845 struct vnode *a_fvp; 846 struct componentname *a_fcnp; 847 struct vnode *a_tdvp; 848 struct vnode *a_tvp; 849 struct componentname *a_tcnp; 850 } */ *ap = v; 851 struct vnode *tvp = ap->a_tvp; 852 struct vnode *tdvp = ap->a_tdvp; 853 struct vnode *fvp = ap->a_fvp; 854 struct vnode *fdvp = ap->a_fdvp; 855 struct componentname *tcnp = ap->a_tcnp; 856 struct componentname *fcnp = ap->a_fcnp; 857 struct lwp *l = tcnp->cn_lwp; 858 struct denode *ip, *xp, *dp, *zp; 859 u_char toname[11], oldname[11]; 860 u_long from_diroffset, to_diroffset; 861 u_char to_count; 862 int doingdirectory = 0, newparent = 0; 863 int error; 864 u_long cn; 865 daddr_t bn; 866 struct msdosfsmount *pmp; 867 struct direntry *dotdotp; 868 struct buf *bp; 869 int fdvp_dorele = 0; 870 871 pmp = VFSTOMSDOSFS(fdvp->v_mount); 872 873 #ifdef DIAGNOSTIC 874 if ((tcnp->cn_flags & HASBUF) == 0 || 875 (fcnp->cn_flags & HASBUF) == 0) 876 panic("msdosfs_rename: no name"); 877 #endif 878 /* 879 * Check for cross-device rename. 880 */ 881 if ((fvp->v_mount != tdvp->v_mount) || 882 (tvp && (fvp->v_mount != tvp->v_mount))) { 883 error = EXDEV; 884 abortit: 885 VOP_ABORTOP(tdvp, tcnp); 886 if (tdvp == tvp) 887 vrele(tdvp); 888 else 889 vput(tdvp); 890 if (tvp) 891 vput(tvp); 892 VOP_ABORTOP(fdvp, fcnp); 893 vrele(fdvp); 894 vrele(fvp); 895 return (error); 896 } 897 898 /* 899 * If source and dest are the same, do nothing. 900 */ 901 if (tvp == fvp) { 902 error = 0; 903 goto abortit; 904 } 905 906 /* 907 * XXX: This can deadlock since we hold tdvp/tvp locked. 908 * But I'm not going to fix it now. If lockmgr detected the 909 * deadlock, this might actually work... sorta. 910 */ 911 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 912 goto abortit; 913 dp = VTODE(fdvp); 914 ip = VTODE(fvp); 915 916 /* 917 * Be sure we are not renaming ".", "..", or an alias of ".". This 918 * leads to a crippled directory tree. It's pretty tough to do a 919 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 920 * doesn't work if the ".." entry is missing. 921 */ 922 if (ip->de_Attributes & ATTR_DIRECTORY) { 923 /* 924 * Avoid ".", "..", and aliases of "." for obvious reasons. 925 */ 926 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 927 dp == ip || 928 (fcnp->cn_flags & ISDOTDOT) || 929 (tcnp->cn_flags & ISDOTDOT) || 930 (ip->de_flag & DE_RENAME)) { 931 VOP_UNLOCK(fvp, 0); 932 error = EINVAL; 933 goto abortit; 934 } 935 ip->de_flag |= DE_RENAME; 936 doingdirectory++; 937 } 938 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 939 940 /* 941 * When the target exists, both the directory 942 * and target vnodes are returned locked. 943 */ 944 dp = VTODE(tdvp); 945 xp = tvp ? VTODE(tvp) : NULL; 946 /* 947 * Remember direntry place to use for destination 948 */ 949 to_diroffset = dp->de_fndoffset; 950 to_count = dp->de_fndcnt; 951 952 /* 953 * If ".." must be changed (ie the directory gets a new 954 * parent) then the source directory must not be in the 955 * directory hierarchy above the target, as this would 956 * orphan everything below the source directory. Also 957 * the user must have write permission in the source so 958 * as to be able to change "..". We must repeat the call 959 * to namei, as the parent directory is unlocked by the 960 * call to doscheckpath(). 961 */ 962 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, l); 963 VOP_UNLOCK(fvp, 0); 964 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 965 newparent = 1; 966 967 /* 968 * XXX: We can do this here because rename uses SAVEFART and 969 * therefore fdvp has at least two references (one doesn't 970 * belong to us, though, and that's evil). We'll get 971 * another "extra" reference when we do relookup(), so we 972 * need to compensate. We should *NOT* be doing this, but 973 * it works, so whatever. 974 */ 975 vrele(fdvp); 976 977 if (doingdirectory && newparent) { 978 if (error) /* write access check above */ 979 goto tdvpbad; 980 if (xp != NULL) 981 vput(tvp); 982 tvp = NULL; 983 /* 984 * doscheckpath() vput()'s dp, 985 * so we have to do a relookup afterwards 986 */ 987 if ((error = doscheckpath(ip, dp)) != 0) 988 goto out; 989 if ((tcnp->cn_flags & SAVESTART) == 0) 990 panic("msdosfs_rename: lost to startdir"); 991 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 992 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) { 993 VOP_UNLOCK(tdvp, 0); 994 goto out; 995 } 996 /* 997 * XXX: SAVESTART causes us to get a reference, but 998 * that's released already above in doscheckpath() 999 */ 1000 dp = VTODE(tdvp); 1001 xp = tvp ? VTODE(tvp) : NULL; 1002 } 1003 1004 if (xp != NULL) { 1005 /* 1006 * Target must be empty if a directory and have no links 1007 * to it. Also, ensure source and target are compatible 1008 * (both directories, or both not directories). 1009 */ 1010 if (xp->de_Attributes & ATTR_DIRECTORY) { 1011 if (!dosdirempty(xp)) { 1012 error = ENOTEMPTY; 1013 goto tdvpbad; 1014 } 1015 if (!doingdirectory) { 1016 error = ENOTDIR; 1017 goto tdvpbad; 1018 } 1019 } else if (doingdirectory) { 1020 error = EISDIR; 1021 goto tdvpbad; 1022 } 1023 if ((error = removede(dp, xp)) != 0) 1024 goto tdvpbad; 1025 VN_KNOTE(tdvp, NOTE_WRITE); 1026 VN_KNOTE(tvp, NOTE_DELETE); 1027 cache_purge(tvp); 1028 vput(tvp); 1029 tvp = NULL; 1030 xp = NULL; 1031 } 1032 1033 /* 1034 * Convert the filename in tcnp into a dos filename. We copy this 1035 * into the denode and directory entry for the destination 1036 * file/directory. 1037 */ 1038 if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) 1039 goto abortit; 1040 1041 /* 1042 * Since from wasn't locked at various places above, 1043 * have to do a relookup here. 1044 */ 1045 fcnp->cn_flags &= ~MODMASK; 1046 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1047 if ((fcnp->cn_flags & SAVESTART) == 0) 1048 panic("msdosfs_rename: lost from startdir"); 1049 VOP_UNLOCK(tdvp, 0); 1050 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1051 if ((error = relookup(fdvp, &fvp, fcnp))) { 1052 VOP_UNLOCK(fdvp, 0); 1053 vrele(ap->a_fvp); 1054 vrele(tdvp); 1055 return (error); 1056 } 1057 if (fvp == NULL) { 1058 /* 1059 * From name has disappeared. 1060 */ 1061 if (doingdirectory) 1062 panic("rename: lost dir entry"); 1063 vput(fdvp); 1064 vrele(ap->a_fvp); 1065 vrele(tdvp); 1066 return 0; 1067 } 1068 fdvp_dorele = 1; 1069 VOP_UNLOCK(fdvp, 0); 1070 xp = VTODE(fvp); 1071 zp = VTODE(fdvp); 1072 from_diroffset = zp->de_fndoffset; 1073 1074 /* 1075 * Ensure that the directory entry still exists and has not 1076 * changed till now. If the source is a file the entry may 1077 * have been unlinked or renamed. In either case there is 1078 * no further work to be done. If the source is a directory 1079 * then it cannot have been rmdir'ed or renamed; this is 1080 * prohibited by the DE_RENAME flag. 1081 */ 1082 if (xp != ip) { 1083 if (doingdirectory) 1084 panic("rename: lost dir entry"); 1085 vrele(ap->a_fvp); 1086 VOP_UNLOCK(fvp, 0); 1087 xp = NULL; 1088 } else { 1089 vrele(fvp); 1090 xp = NULL; 1091 1092 /* 1093 * First write a new entry in the destination 1094 * directory and mark the entry in the source directory 1095 * as deleted. Then move the denode to the correct hash 1096 * chain for its new location in the filesystem. And, if 1097 * we moved a directory, then update its .. entry to point 1098 * to the new parent directory. 1099 */ 1100 memcpy(oldname, ip->de_Name, 11); 1101 memcpy(ip->de_Name, toname, 11); /* update denode */ 1102 dp->de_fndoffset = to_diroffset; 1103 dp->de_fndcnt = to_count; 1104 error = createde(ip, dp, (struct denode **)0, tcnp); 1105 if (error) { 1106 memcpy(ip->de_Name, oldname, 11); 1107 VOP_UNLOCK(fvp, 0); 1108 goto bad; 1109 } 1110 ip->de_refcnt++; 1111 zp->de_fndoffset = from_diroffset; 1112 if ((error = removede(zp, ip)) != 0) { 1113 /* XXX should really panic here, fs is corrupt */ 1114 VOP_UNLOCK(fvp, 0); 1115 goto bad; 1116 } 1117 cache_purge(fvp); 1118 if (!doingdirectory) { 1119 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1120 &ip->de_dirclust, 0); 1121 if (error) { 1122 /* XXX should really panic here, fs is corrupt */ 1123 VOP_UNLOCK(fvp, 0); 1124 goto bad; 1125 } 1126 ip->de_diroffset = to_diroffset; 1127 if (ip->de_dirclust != MSDOSFSROOT) 1128 ip->de_diroffset &= pmp->pm_crbomask; 1129 } 1130 reinsert(ip); 1131 } 1132 1133 /* 1134 * If we moved a directory to a new parent directory, then we must 1135 * fixup the ".." entry in the moved directory. 1136 */ 1137 if (doingdirectory && newparent) { 1138 cn = ip->de_StartCluster; 1139 if (cn == MSDOSFSROOT) { 1140 /* this should never happen */ 1141 panic("msdosfs_rename: updating .. in root directory?"); 1142 } else 1143 bn = cntobn(pmp, cn); 1144 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), 1145 pmp->pm_bpcluster, NOCRED, &bp); 1146 if (error) { 1147 /* XXX should really panic here, fs is corrupt */ 1148 brelse(bp); 1149 VOP_UNLOCK(fvp, 0); 1150 goto bad; 1151 } 1152 dotdotp = (struct direntry *)bp->b_data + 1; 1153 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1154 if (FAT32(pmp)) { 1155 putushort(dotdotp->deHighClust, 1156 dp->de_StartCluster >> 16); 1157 } else { 1158 putushort(dotdotp->deHighClust, 0); 1159 } 1160 if ((error = bwrite(bp)) != 0) { 1161 /* XXX should really panic here, fs is corrupt */ 1162 VOP_UNLOCK(fvp, 0); 1163 goto bad; 1164 } 1165 } 1166 1167 VN_KNOTE(fvp, NOTE_RENAME); 1168 VOP_UNLOCK(fvp, 0); 1169 bad: 1170 if (tvp) 1171 vput(tvp); 1172 vrele(tdvp); 1173 out: 1174 ip->de_flag &= ~DE_RENAME; 1175 if (fdvp_dorele) 1176 vrele(fdvp); 1177 vrele(fvp); 1178 return (error); 1179 1180 /* XXX: uuuh */ 1181 tdvpbad: 1182 VOP_UNLOCK(tdvp, 0); 1183 goto bad; 1184 } 1185 1186 static const struct { 1187 struct direntry dot; 1188 struct direntry dotdot; 1189 } dosdirtemplate = { 1190 { ". ", " ", /* the . entry */ 1191 ATTR_DIRECTORY, /* file attribute */ 1192 0, /* reserved */ 1193 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1194 { 0, 0 }, /* access date */ 1195 { 0, 0 }, /* high bits of start cluster */ 1196 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1197 { 0, 0 }, /* startcluster */ 1198 { 0, 0, 0, 0 } /* filesize */ 1199 }, 1200 { ".. ", " ", /* the .. entry */ 1201 ATTR_DIRECTORY, /* file attribute */ 1202 0, /* reserved */ 1203 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1204 { 0, 0 }, /* access date */ 1205 { 0, 0 }, /* high bits of start cluster */ 1206 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1207 { 0, 0 }, /* startcluster */ 1208 { 0, 0, 0, 0 } /* filesize */ 1209 } 1210 }; 1211 1212 int 1213 msdosfs_mkdir(v) 1214 void *v; 1215 { 1216 struct vop_mkdir_args /* { 1217 struct vnode *a_dvp; 1218 struvt vnode **a_vpp; 1219 struvt componentname *a_cnp; 1220 struct vattr *a_vap; 1221 } */ *ap = v; 1222 struct componentname *cnp = ap->a_cnp; 1223 struct denode ndirent; 1224 struct denode *dep; 1225 struct denode *pdep = VTODE(ap->a_dvp); 1226 int error; 1227 int bn; 1228 u_long newcluster, pcl; 1229 struct direntry *denp; 1230 struct msdosfsmount *pmp = pdep->de_pmp; 1231 struct buf *bp; 1232 int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC; 1233 1234 /* 1235 * If this is the root directory and there is no space left we 1236 * can't do anything. This is because the root directory can not 1237 * change size. 1238 */ 1239 if (pdep->de_StartCluster == MSDOSFSROOT 1240 && pdep->de_fndoffset >= pdep->de_FileSize) { 1241 error = ENOSPC; 1242 goto bad2; 1243 } 1244 1245 /* 1246 * Allocate a cluster to hold the about to be created directory. 1247 */ 1248 error = clusteralloc(pmp, 0, 1, &newcluster, NULL); 1249 if (error) 1250 goto bad2; 1251 1252 memset(&ndirent, 0, sizeof(ndirent)); 1253 ndirent.de_pmp = pmp; 1254 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1255 DETIMES(&ndirent, NULL, NULL, NULL, pmp->pm_gmtoff); 1256 1257 /* 1258 * Now fill the cluster with the "." and ".." entries. And write 1259 * the cluster to disk. This way it is there for the parent 1260 * directory to be pointing at if there were a crash. 1261 */ 1262 bn = cntobn(pmp, newcluster); 1263 /* always succeeds */ 1264 bp = getblk(pmp->pm_devvp, de_bn2kb(pmp, bn), pmp->pm_bpcluster, 0, 0); 1265 memset(bp->b_data, 0, pmp->pm_bpcluster); 1266 memcpy(bp->b_data, &dosdirtemplate, sizeof dosdirtemplate); 1267 denp = (struct direntry *)bp->b_data; 1268 putushort(denp[0].deStartCluster, newcluster); 1269 putushort(denp[0].deCDate, ndirent.de_CDate); 1270 putushort(denp[0].deCTime, ndirent.de_CTime); 1271 denp[0].deCHundredth = ndirent.de_CHun; 1272 putushort(denp[0].deADate, ndirent.de_ADate); 1273 putushort(denp[0].deMDate, ndirent.de_MDate); 1274 putushort(denp[0].deMTime, ndirent.de_MTime); 1275 pcl = pdep->de_StartCluster; 1276 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1277 pcl = 0; 1278 putushort(denp[1].deStartCluster, pcl); 1279 putushort(denp[1].deCDate, ndirent.de_CDate); 1280 putushort(denp[1].deCTime, ndirent.de_CTime); 1281 denp[1].deCHundredth = ndirent.de_CHun; 1282 putushort(denp[1].deADate, ndirent.de_ADate); 1283 putushort(denp[1].deMDate, ndirent.de_MDate); 1284 putushort(denp[1].deMTime, ndirent.de_MTime); 1285 if (FAT32(pmp)) { 1286 putushort(denp[0].deHighClust, newcluster >> 16); 1287 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1288 } else { 1289 putushort(denp[0].deHighClust, 0); 1290 putushort(denp[1].deHighClust, 0); 1291 } 1292 1293 if (async) 1294 bdwrite(bp); 1295 else if ((error = bwrite(bp)) != 0) 1296 goto bad; 1297 1298 /* 1299 * Now build up a directory entry pointing to the newly allocated 1300 * cluster. This will be written to an empty slot in the parent 1301 * directory. 1302 */ 1303 #ifdef DIAGNOSTIC 1304 if ((cnp->cn_flags & HASBUF) == 0) 1305 panic("msdosfs_mkdir: no name"); 1306 #endif 1307 if ((error = uniqdosname(pdep, cnp, ndirent.de_Name)) != 0) 1308 goto bad; 1309 1310 ndirent.de_Attributes = ATTR_DIRECTORY; 1311 ndirent.de_StartCluster = newcluster; 1312 ndirent.de_FileSize = 0; 1313 ndirent.de_dev = pdep->de_dev; 1314 ndirent.de_devvp = pdep->de_devvp; 1315 if ((error = createde(&ndirent, pdep, &dep, cnp)) != 0) 1316 goto bad; 1317 if ((cnp->cn_flags & SAVESTART) == 0) 1318 PNBUF_PUT(cnp->cn_pnbuf); 1319 VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1320 vput(ap->a_dvp); 1321 *ap->a_vpp = DETOV(dep); 1322 return (0); 1323 1324 bad: 1325 clusterfree(pmp, newcluster, NULL); 1326 bad2: 1327 PNBUF_PUT(cnp->cn_pnbuf); 1328 vput(ap->a_dvp); 1329 return (error); 1330 } 1331 1332 int 1333 msdosfs_rmdir(v) 1334 void *v; 1335 { 1336 struct vop_rmdir_args /* { 1337 struct vnode *a_dvp; 1338 struct vnode *a_vp; 1339 struct componentname *a_cnp; 1340 } */ *ap = v; 1341 struct vnode *vp = ap->a_vp; 1342 struct vnode *dvp = ap->a_dvp; 1343 struct componentname *cnp = ap->a_cnp; 1344 struct denode *ip, *dp; 1345 int error; 1346 1347 ip = VTODE(vp); 1348 dp = VTODE(dvp); 1349 /* 1350 * No rmdir "." please. 1351 */ 1352 if (dp == ip) { 1353 vrele(dvp); 1354 vput(vp); 1355 return (EINVAL); 1356 } 1357 /* 1358 * Verify the directory is empty (and valid). 1359 * (Rmdir ".." won't be valid since 1360 * ".." will contain a reference to 1361 * the current directory and thus be 1362 * non-empty.) 1363 */ 1364 error = 0; 1365 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1366 error = ENOTEMPTY; 1367 goto out; 1368 } 1369 /* 1370 * Delete the entry from the directory. For dos filesystems this 1371 * gets rid of the directory entry on disk, the in memory copy 1372 * still exists but the de_refcnt is <= 0. This prevents it from 1373 * being found by deget(). When the vput() on dep is done we give 1374 * up access and eventually msdosfs_reclaim() will be called which 1375 * will remove it from the denode cache. 1376 */ 1377 if ((error = removede(dp, ip)) != 0) 1378 goto out; 1379 /* 1380 * This is where we decrement the link count in the parent 1381 * directory. Since dos filesystems don't do this we just purge 1382 * the name cache and let go of the parent directory denode. 1383 */ 1384 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1385 cache_purge(dvp); 1386 vput(dvp); 1387 dvp = NULL; 1388 /* 1389 * Truncate the directory that is being deleted. 1390 */ 1391 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, cnp->cn_lwp); 1392 cache_purge(vp); 1393 out: 1394 VN_KNOTE(vp, NOTE_DELETE); 1395 if (dvp) 1396 vput(dvp); 1397 vput(vp); 1398 return (error); 1399 } 1400 1401 /* 1402 * DOS filesystems don't know what symlinks are. 1403 */ 1404 int 1405 msdosfs_symlink(v) 1406 void *v; 1407 { 1408 struct vop_symlink_args /* { 1409 struct vnode *a_dvp; 1410 struct vnode **a_vpp; 1411 struct componentname *a_cnp; 1412 struct vattr *a_vap; 1413 char *a_target; 1414 } */ *ap = v; 1415 1416 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 1417 vput(ap->a_dvp); 1418 return (EOPNOTSUPP); 1419 } 1420 1421 int 1422 msdosfs_readdir(v) 1423 void *v; 1424 { 1425 struct vop_readdir_args /* { 1426 struct vnode *a_vp; 1427 struct uio *a_uio; 1428 kauth_cred_t a_cred; 1429 int *a_eofflag; 1430 off_t **a_cookies; 1431 int *a_ncookies; 1432 } */ *ap = v; 1433 int error = 0; 1434 int diff; 1435 long n; 1436 int blsize; 1437 long on; 1438 long lost; 1439 long count; 1440 u_long cn; 1441 ino_t fileno; 1442 u_long dirsperblk; 1443 long bias = 0; 1444 daddr_t bn, lbn; 1445 struct buf *bp; 1446 struct denode *dep = VTODE(ap->a_vp); 1447 struct msdosfsmount *pmp = dep->de_pmp; 1448 struct direntry *dentp; 1449 struct dirent dirbuf; 1450 struct uio *uio = ap->a_uio; 1451 off_t *cookies = NULL; 1452 int ncookies = 0, nc = 0; 1453 off_t offset, uio_off; 1454 int chksum = -1; 1455 1456 #ifdef MSDOSFS_DEBUG 1457 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1458 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1459 #endif 1460 1461 /* 1462 * msdosfs_readdir() won't operate properly on regular files since 1463 * it does i/o only with the filesystem vnode, and hence can 1464 * retrieve the wrong block from the buffer cache for a plain file. 1465 * So, fail attempts to readdir() on a plain file. 1466 */ 1467 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1468 return (ENOTDIR); 1469 1470 /* 1471 * To be safe, initialize dirbuf 1472 */ 1473 memset(dirbuf.d_name, 0, sizeof(dirbuf.d_name)); 1474 1475 /* 1476 * If the user buffer is smaller than the size of one dos directory 1477 * entry or the file offset is not a multiple of the size of a 1478 * directory entry, then we fail the read. 1479 */ 1480 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1481 offset = uio->uio_offset; 1482 if (count < sizeof(struct direntry) || 1483 (offset & (sizeof(struct direntry) - 1))) 1484 return (EINVAL); 1485 lost = uio->uio_resid - count; 1486 uio->uio_resid = count; 1487 uio_off = uio->uio_offset; 1488 1489 if (ap->a_ncookies) { 1490 nc = uio->uio_resid / 16; 1491 cookies = malloc(nc * sizeof (off_t), M_TEMP, M_WAITOK); 1492 *ap->a_cookies = cookies; 1493 } 1494 1495 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1496 1497 /* 1498 * If they are reading from the root directory then, we simulate 1499 * the . and .. entries since these don't exist in the root 1500 * directory. We also set the offset bias to make up for having to 1501 * simulate these entries. By this I mean that at file offset 64 we 1502 * read the first entry in the root directory that lives on disk. 1503 */ 1504 if (dep->de_StartCluster == MSDOSFSROOT 1505 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1506 #if 0 1507 printf("msdosfs_readdir(): going after . or .. in root dir, " 1508 "offset %" PRIu64 "\n", offset); 1509 #endif 1510 bias = 2 * sizeof(struct direntry); 1511 if (offset < bias) { 1512 for (n = (int)offset / sizeof(struct direntry); 1513 n < 2; n++) { 1514 if (FAT32(pmp)) 1515 dirbuf.d_fileno = cntobn(pmp, 1516 (ino_t)pmp->pm_rootdirblk) 1517 * dirsperblk; 1518 else 1519 dirbuf.d_fileno = 1; 1520 dirbuf.d_type = DT_DIR; 1521 switch (n) { 1522 case 0: 1523 dirbuf.d_namlen = 1; 1524 strlcpy(dirbuf.d_name, ".", 1525 sizeof(dirbuf.d_name)); 1526 break; 1527 case 1: 1528 dirbuf.d_namlen = 2; 1529 strlcpy(dirbuf.d_name, "..", 1530 sizeof(dirbuf.d_name)); 1531 break; 1532 } 1533 dirbuf.d_reclen = _DIRENT_SIZE(&dirbuf); 1534 if (uio->uio_resid < dirbuf.d_reclen) 1535 goto out; 1536 error = uiomove(&dirbuf, 1537 dirbuf.d_reclen, uio); 1538 if (error) 1539 goto out; 1540 offset += sizeof(struct direntry); 1541 uio_off = offset; 1542 if (cookies) { 1543 *cookies++ = offset; 1544 ncookies++; 1545 if (ncookies >= nc) 1546 goto out; 1547 } 1548 } 1549 } 1550 } 1551 1552 while (uio->uio_resid > 0) { 1553 lbn = de_cluster(pmp, offset - bias); 1554 on = (offset - bias) & pmp->pm_crbomask; 1555 n = MIN(pmp->pm_bpcluster - on, uio->uio_resid); 1556 diff = dep->de_FileSize - (offset - bias); 1557 if (diff <= 0) 1558 break; 1559 n = MIN(n, diff); 1560 if ((error = pcbmap(dep, lbn, &bn, &cn, &blsize)) != 0) 1561 break; 1562 error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn), blsize, 1563 NOCRED, &bp); 1564 if (error) { 1565 brelse(bp); 1566 return (error); 1567 } 1568 n = MIN(n, blsize - bp->b_resid); 1569 1570 /* 1571 * Convert from dos directory entries to fs-independent 1572 * directory entries. 1573 */ 1574 for (dentp = (struct direntry *)(bp->b_data + on); 1575 (char *)dentp < bp->b_data + on + n; 1576 dentp++, offset += sizeof(struct direntry)) { 1577 #if 0 1578 1579 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1580 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1581 #endif 1582 /* 1583 * If this is an unused entry, we can stop. 1584 */ 1585 if (dentp->deName[0] == SLOT_EMPTY) { 1586 brelse(bp); 1587 goto out; 1588 } 1589 /* 1590 * Skip deleted entries. 1591 */ 1592 if (dentp->deName[0] == SLOT_DELETED) { 1593 chksum = -1; 1594 continue; 1595 } 1596 1597 /* 1598 * Handle Win95 long directory entries 1599 */ 1600 if (dentp->deAttributes == ATTR_WIN95) { 1601 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1602 continue; 1603 chksum = win2unixfn((struct winentry *)dentp, &dirbuf, chksum); 1604 continue; 1605 } 1606 1607 /* 1608 * Skip volume labels 1609 */ 1610 if (dentp->deAttributes & ATTR_VOLUME) { 1611 chksum = -1; 1612 continue; 1613 } 1614 /* 1615 * This computation of d_fileno must match 1616 * the computation of va_fileid in 1617 * msdosfs_getattr. 1618 */ 1619 if (dentp->deAttributes & ATTR_DIRECTORY) { 1620 fileno = getushort(dentp->deStartCluster); 1621 if (FAT32(pmp)) 1622 fileno |= ((ino_t)getushort(dentp->deHighClust)) << 16; 1623 /* if this is the root directory */ 1624 if (fileno == MSDOSFSROOT) 1625 if (FAT32(pmp)) 1626 fileno = cntobn(pmp, 1627 (ino_t)pmp->pm_rootdirblk) 1628 * dirsperblk; 1629 else 1630 fileno = 1; 1631 else 1632 fileno = cntobn(pmp, fileno) * dirsperblk; 1633 dirbuf.d_fileno = fileno; 1634 dirbuf.d_type = DT_DIR; 1635 } else { 1636 dirbuf.d_fileno = offset / sizeof(struct direntry); 1637 dirbuf.d_type = DT_REG; 1638 } 1639 if (chksum != winChksum(dentp->deName)) 1640 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1641 (u_char *)dirbuf.d_name, 1642 pmp->pm_flags & MSDOSFSMNT_SHORTNAME); 1643 else 1644 dirbuf.d_name[dirbuf.d_namlen] = 0; 1645 chksum = -1; 1646 dirbuf.d_reclen = _DIRENT_SIZE(&dirbuf); 1647 if (uio->uio_resid < dirbuf.d_reclen) { 1648 brelse(bp); 1649 goto out; 1650 } 1651 error = uiomove(&dirbuf, 1652 dirbuf.d_reclen, uio); 1653 if (error) { 1654 brelse(bp); 1655 goto out; 1656 } 1657 uio_off = offset + sizeof(struct direntry); 1658 if (cookies) { 1659 *cookies++ = offset + sizeof(struct direntry); 1660 ncookies++; 1661 if (ncookies >= nc) { 1662 brelse(bp); 1663 goto out; 1664 } 1665 } 1666 } 1667 brelse(bp); 1668 } 1669 1670 out: 1671 uio->uio_offset = uio_off; 1672 uio->uio_resid += lost; 1673 if (dep->de_FileSize - (offset - bias) <= 0) 1674 *ap->a_eofflag = 1; 1675 else 1676 *ap->a_eofflag = 0; 1677 1678 if (ap->a_ncookies) { 1679 if (error) { 1680 free(*ap->a_cookies, M_TEMP); 1681 *ap->a_ncookies = 0; 1682 *ap->a_cookies = NULL; 1683 } else 1684 *ap->a_ncookies = ncookies; 1685 } 1686 return (error); 1687 } 1688 1689 /* 1690 * DOS filesystems don't know what symlinks are. 1691 */ 1692 int 1693 msdosfs_readlink(void *v) 1694 { 1695 #if 0 1696 struct vop_readlink_args /* { 1697 struct vnode *a_vp; 1698 struct uio *a_uio; 1699 kauth_cred_t a_cred; 1700 } */ *ap; 1701 #endif 1702 1703 return (EINVAL); 1704 } 1705 1706 /* 1707 * vp - address of vnode file the file 1708 * bn - which cluster we are interested in mapping to a filesystem block number. 1709 * vpp - returns the vnode for the block special file holding the filesystem 1710 * containing the file of interest 1711 * bnp - address of where to return the filesystem relative block number 1712 */ 1713 int 1714 msdosfs_bmap(v) 1715 void *v; 1716 { 1717 struct vop_bmap_args /* { 1718 struct vnode *a_vp; 1719 daddr_t a_bn; 1720 struct vnode **a_vpp; 1721 daddr_t *a_bnp; 1722 int *a_runp; 1723 } */ *ap = v; 1724 struct denode *dep = VTODE(ap->a_vp); 1725 int status; 1726 1727 if (ap->a_vpp != NULL) 1728 *ap->a_vpp = dep->de_devvp; 1729 if (ap->a_bnp == NULL) 1730 return (0); 1731 if (ap->a_runp) { 1732 /* 1733 * Sequential clusters should be counted here. 1734 */ 1735 *ap->a_runp = 0; 1736 } 1737 status = pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0); 1738 /* 1739 * We need to scale *ap->a_bnp by sector_size/DEV_BSIZE 1740 */ 1741 *ap->a_bnp = de_bn2kb(dep->de_pmp, *ap->a_bnp); 1742 return status; 1743 } 1744 1745 int 1746 msdosfs_strategy(v) 1747 void *v; 1748 { 1749 struct vop_strategy_args /* { 1750 struct vnode *a_vp; 1751 struct buf *a_bp; 1752 } */ *ap = v; 1753 struct vnode *vp = ap->a_vp; 1754 struct buf *bp = ap->a_bp; 1755 struct denode *dep = VTODE(bp->b_vp); 1756 int error = 0; 1757 1758 if (vp->v_type == VBLK || vp->v_type == VCHR) 1759 panic("msdosfs_strategy: spec"); 1760 /* 1761 * If we don't already know the filesystem relative block number 1762 * then get it using pcbmap(). If pcbmap() returns the block 1763 * number as -1 then we've got a hole in the file. DOS filesystems 1764 * don't allow files with holes, so we shouldn't ever see this. 1765 */ 1766 if (bp->b_blkno == bp->b_lblkno) { 1767 error = pcbmap(dep, de_bn2cn(dep->de_pmp, bp->b_lblkno), 1768 &bp->b_blkno, 0, 0); 1769 if (error) 1770 bp->b_blkno = -1; 1771 if (bp->b_blkno == -1) 1772 clrbuf(bp); 1773 else 1774 bp->b_blkno = de_bn2kb(dep->de_pmp, bp->b_blkno); 1775 } 1776 if (bp->b_blkno == -1) { 1777 biodone(bp); 1778 return (error); 1779 } 1780 1781 /* 1782 * Read/write the block from/to the disk that contains the desired 1783 * file block. 1784 */ 1785 1786 vp = dep->de_devvp; 1787 return (VOP_STRATEGY(vp, bp)); 1788 } 1789 1790 int 1791 msdosfs_print(v) 1792 void *v; 1793 { 1794 struct vop_print_args /* { 1795 struct vnode *vp; 1796 } */ *ap = v; 1797 struct denode *dep = VTODE(ap->a_vp); 1798 1799 printf( 1800 "tag VT_MSDOSFS, startcluster %ld, dircluster %ld, diroffset %ld ", 1801 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1802 printf(" dev %d, %d ", major(dep->de_dev), minor(dep->de_dev)); 1803 lockmgr_printinfo(&ap->a_vp->v_lock); 1804 printf("\n"); 1805 return (0); 1806 } 1807 1808 int 1809 msdosfs_advlock(v) 1810 void *v; 1811 { 1812 struct vop_advlock_args /* { 1813 struct vnode *a_vp; 1814 void *a_id; 1815 int a_op; 1816 struct flock *a_fl; 1817 int a_flags; 1818 } */ *ap = v; 1819 struct denode *dep = VTODE(ap->a_vp); 1820 1821 return lf_advlock(ap, &dep->de_lockf, dep->de_FileSize); 1822 } 1823 1824 int 1825 msdosfs_pathconf(v) 1826 void *v; 1827 { 1828 struct vop_pathconf_args /* { 1829 struct vnode *a_vp; 1830 int a_name; 1831 register_t *a_retval; 1832 } */ *ap = v; 1833 1834 switch (ap->a_name) { 1835 case _PC_LINK_MAX: 1836 *ap->a_retval = 1; 1837 return (0); 1838 case _PC_NAME_MAX: 1839 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 1840 return (0); 1841 case _PC_PATH_MAX: 1842 *ap->a_retval = PATH_MAX; 1843 return (0); 1844 case _PC_CHOWN_RESTRICTED: 1845 *ap->a_retval = 1; 1846 return (0); 1847 case _PC_NO_TRUNC: 1848 *ap->a_retval = 0; 1849 return (0); 1850 case _PC_SYNC_IO: 1851 *ap->a_retval = 1; 1852 return (0); 1853 case _PC_FILESIZEBITS: 1854 *ap->a_retval = 32; 1855 return (0); 1856 default: 1857 return (EINVAL); 1858 } 1859 /* NOTREACHED */ 1860 } 1861 1862 int 1863 msdosfs_fsync(v) 1864 void *v; 1865 { 1866 struct vop_fsync_args /* { 1867 struct vnode *a_vp; 1868 kauth_cred_t a_cred; 1869 int a_flags; 1870 off_t offlo; 1871 off_t offhi; 1872 struct lwp *a_l; 1873 } */ *ap = v; 1874 struct vnode *vp = ap->a_vp; 1875 int wait; 1876 int error; 1877 1878 wait = (ap->a_flags & FSYNC_WAIT) != 0; 1879 vflushbuf(vp, wait); 1880 if ((ap->a_flags & FSYNC_DATAONLY) != 0) 1881 error = 0; 1882 else 1883 error = msdosfs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); 1884 1885 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 1886 struct denode *dep = VTODE(vp); 1887 struct vnode *devvp = dep->de_devvp; 1888 1889 int l = 0; 1890 error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE, 1891 ap->a_l->l_cred, ap->a_l); 1892 } 1893 1894 return (error); 1895 } 1896 1897 void 1898 msdosfs_detimes(struct denode *dep, const struct timespec *acc, 1899 const struct timespec *mod, const struct timespec *cre, int gmtoff) 1900 { 1901 struct timespec *ts = NULL, tsb; 1902 1903 KASSERT(dep->de_flag & (DE_UPDATE | DE_CREATE | DE_ACCESS)); 1904 /* XXX just call getnanotime early and use result if needed? */ 1905 dep->de_flag |= DE_MODIFIED; 1906 if (dep->de_flag & DE_UPDATE) { 1907 if (mod == NULL) { 1908 getnanotime(&tsb); 1909 mod = ts = &tsb; 1910 } 1911 unix2dostime(mod, gmtoff, &dep->de_MDate, &dep->de_MTime, NULL); 1912 dep->de_Attributes |= ATTR_ARCHIVE; 1913 } 1914 if ((dep->de_pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0) { 1915 if (dep->de_flag & DE_ACCESS) { 1916 if (acc == NULL) 1917 acc = ts == NULL ? 1918 (getnanotime(&tsb), ts = &tsb) : ts; 1919 unix2dostime(acc, gmtoff, &dep->de_ADate, NULL, NULL); 1920 } 1921 if (dep->de_flag & DE_CREATE) { 1922 if (cre == NULL) 1923 cre = ts == NULL ? 1924 (getnanotime(&tsb), ts = &tsb) : ts; 1925 unix2dostime(cre, gmtoff, &dep->de_CDate, 1926 &dep->de_CTime, &dep->de_CHun); 1927 } 1928 } 1929 1930 dep->de_flag &= ~(DE_UPDATE | DE_CREATE | DE_ACCESS); 1931 } 1932 1933 /* Global vfs data structures for msdosfs */ 1934 int (**msdosfs_vnodeop_p)(void *); 1935 const struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1936 { &vop_default_desc, vn_default_error }, 1937 { &vop_lookup_desc, msdosfs_lookup }, /* lookup */ 1938 { &vop_create_desc, msdosfs_create }, /* create */ 1939 { &vop_mknod_desc, msdosfs_mknod }, /* mknod */ 1940 { &vop_open_desc, msdosfs_open }, /* open */ 1941 { &vop_close_desc, msdosfs_close }, /* close */ 1942 { &vop_access_desc, msdosfs_access }, /* access */ 1943 { &vop_getattr_desc, msdosfs_getattr }, /* getattr */ 1944 { &vop_setattr_desc, msdosfs_setattr }, /* setattr */ 1945 { &vop_read_desc, msdosfs_read }, /* read */ 1946 { &vop_write_desc, msdosfs_write }, /* write */ 1947 { &vop_lease_desc, msdosfs_lease_check }, /* lease */ 1948 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 1949 { &vop_ioctl_desc, msdosfs_ioctl }, /* ioctl */ 1950 { &vop_poll_desc, msdosfs_poll }, /* poll */ 1951 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 1952 { &vop_revoke_desc, msdosfs_revoke }, /* revoke */ 1953 { &vop_mmap_desc, msdosfs_mmap }, /* mmap */ 1954 { &vop_fsync_desc, msdosfs_fsync }, /* fsync */ 1955 { &vop_seek_desc, msdosfs_seek }, /* seek */ 1956 { &vop_remove_desc, msdosfs_remove }, /* remove */ 1957 { &vop_link_desc, msdosfs_link }, /* link */ 1958 { &vop_rename_desc, msdosfs_rename }, /* rename */ 1959 { &vop_mkdir_desc, msdosfs_mkdir }, /* mkdir */ 1960 { &vop_rmdir_desc, msdosfs_rmdir }, /* rmdir */ 1961 { &vop_symlink_desc, msdosfs_symlink }, /* symlink */ 1962 { &vop_readdir_desc, msdosfs_readdir }, /* readdir */ 1963 { &vop_readlink_desc, msdosfs_readlink }, /* readlink */ 1964 { &vop_abortop_desc, msdosfs_abortop }, /* abortop */ 1965 { &vop_inactive_desc, msdosfs_inactive }, /* inactive */ 1966 { &vop_reclaim_desc, msdosfs_reclaim }, /* reclaim */ 1967 { &vop_lock_desc, genfs_lock }, /* lock */ 1968 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1969 { &vop_bmap_desc, msdosfs_bmap }, /* bmap */ 1970 { &vop_strategy_desc, msdosfs_strategy }, /* strategy */ 1971 { &vop_print_desc, msdosfs_print }, /* print */ 1972 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1973 { &vop_pathconf_desc, msdosfs_pathconf }, /* pathconf */ 1974 { &vop_advlock_desc, msdosfs_advlock }, /* advlock */ 1975 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1976 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1977 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1978 { NULL, NULL } 1979 }; 1980 const struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1981 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
Cache object: c6cfa508da02c52cdd0f8480a5914e4b
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