1 /* $Id: msdosfs_vnops.c,v 1.26 1995/10/29 15:31:53 phk Exp $ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.20 1994/08/21 18:44:13 ws Exp $ */ 3 4 /*- 5 * Copyright (C) 1994 Wolfgang Solfrank. 6 * Copyright (C) 1994 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /* 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/namei.h> 54 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 55 #include <sys/kernel.h> 56 #include <sys/file.h> /* define FWRITE ... */ 57 #include <sys/stat.h> 58 #include <sys/buf.h> 59 #include <sys/proc.h> 60 #include <sys/mount.h> 61 #include <sys/vnode.h> 62 #include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 63 #include <sys/malloc.h> 64 #include <sys/dir.h> /* defines dirent structure */ 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 69 #include <msdosfs/bpb.h> 70 #include <msdosfs/direntry.h> 71 #include <msdosfs/denode.h> 72 #include <msdosfs/msdosfsmount.h> 73 #include <msdosfs/fat.h> 74 75 /* 76 * Prototypes for MSDOSFS vnode operations 77 */ 78 static int msdosfs_create __P((struct vop_create_args *)); 79 static int msdosfs_mknod __P((struct vop_mknod_args *)); 80 static int msdosfs_open __P((struct vop_open_args *)); 81 static int msdosfs_close __P((struct vop_close_args *)); 82 static int msdosfs_access __P((struct vop_access_args *)); 83 static int msdosfs_getattr __P((struct vop_getattr_args *)); 84 static int msdosfs_setattr __P((struct vop_setattr_args *)); 85 static int msdosfs_read __P((struct vop_read_args *)); 86 static int msdosfs_write __P((struct vop_write_args *)); 87 static int msdosfs_ioctl __P((struct vop_ioctl_args *)); 88 static int msdosfs_select __P((struct vop_select_args *)); 89 static int msdosfs_mmap __P((struct vop_mmap_args *)); 90 static int msdosfs_fsync __P((struct vop_fsync_args *)); 91 static int msdosfs_seek __P((struct vop_seek_args *)); 92 static int msdosfs_remove __P((struct vop_remove_args *)); 93 static int msdosfs_link __P((struct vop_link_args *)); 94 static int msdosfs_rename __P((struct vop_rename_args *)); 95 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 96 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 97 static int msdosfs_symlink __P((struct vop_symlink_args *)); 98 static int msdosfs_readdir __P((struct vop_readdir_args *)); 99 static int msdosfs_readlink __P((struct vop_readlink_args *)); 100 static int msdosfs_abortop __P((struct vop_abortop_args *)); 101 static int msdosfs_lock __P((struct vop_lock_args *)); 102 static int msdosfs_unlock __P((struct vop_unlock_args *)); 103 static int msdosfs_bmap __P((struct vop_bmap_args *)); 104 static int msdosfs_strategy __P((struct vop_strategy_args *)); 105 static int msdosfs_print __P((struct vop_print_args *)); 106 static int msdosfs_islocked __P((struct vop_islocked_args *)); 107 static int msdosfs_advlock __P((struct vop_advlock_args *)); 108 static int msdosfs_reallocblks __P((struct vop_reallocblks_args *)); 109 110 /* 111 * Some general notes: 112 * 113 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 114 * read/written using the vnode for the filesystem. Blocks that represent 115 * the contents of a file are read/written using the vnode for the file 116 * (including directories when they are read/written as files). This 117 * presents problems for the dos filesystem because data that should be in 118 * an inode (if dos had them) resides in the directory itself. Since we 119 * must update directory entries without the benefit of having the vnode 120 * for the directory we must use the vnode for the filesystem. This means 121 * that when a directory is actually read/written (via read, write, or 122 * readdir, or seek) we must use the vnode for the filesystem instead of 123 * the vnode for the directory as would happen in ufs. This is to insure we 124 * retreive the correct block from the buffer cache since the hash value is 125 * based upon the vnode address and the desired block number. 126 */ 127 128 /* 129 * Create a regular file. On entry the directory to contain the file being 130 * created is locked. We must release before we return. We must also free 131 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 132 * only if the SAVESTART bit in cn_flags is clear on success. 133 */ 134 static int 135 msdosfs_create(ap) 136 struct vop_create_args /* { 137 struct vnode *a_dvp; 138 struct vnode **a_vpp; 139 struct componentname *a_cnp; 140 struct vattr *a_vap; 141 } */ *ap; 142 { 143 struct componentname *cnp = ap->a_cnp; 144 struct denode ndirent; 145 struct denode *dep; 146 struct denode *pdep = VTODE(ap->a_dvp); 147 struct timespec ts; 148 int error; 149 150 #ifdef MSDOSFS_DEBUG 151 printf("msdosfs_create(cnp %08x, vap %08x\n", cnp, ap->a_vap); 152 #endif 153 154 /* 155 * Create a directory entry for the file, then call createde() to 156 * have it installed. NOTE: DOS files are always executable. We 157 * use the absence of the owner write bit to make the file 158 * readonly. 159 */ 160 #ifdef DIAGNOSTIC 161 if ((cnp->cn_flags & SAVENAME) == 0) 162 panic("msdosfs_create: no name"); 163 #endif 164 bzero(&ndirent, sizeof(ndirent)); 165 TIMEVAL_TO_TIMESPEC(&time, &ts); 166 unix2dostime(&ts, &ndirent.de_Date, &ndirent.de_Time); 167 unix2dosfn((u_char *)cnp->cn_nameptr, ndirent.de_Name, cnp->cn_namelen); 168 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) 169 ? ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 170 ndirent.de_StartCluster = 0; 171 ndirent.de_FileSize = 0; 172 ndirent.de_dev = pdep->de_dev; 173 ndirent.de_devvp = pdep->de_devvp; 174 if ((error = createde(&ndirent, pdep, &dep)) == 0) { 175 *ap->a_vpp = DETOV(dep); 176 if ((cnp->cn_flags & SAVESTART) == 0) 177 free(cnp->cn_pnbuf, M_NAMEI); 178 } else { 179 free(cnp->cn_pnbuf, M_NAMEI); 180 } 181 vput(ap->a_dvp); /* release parent dir */ 182 return error; 183 } 184 185 static int 186 msdosfs_mknod(ap) 187 struct vop_mknod_args /* { 188 struct vnode *a_dvp; 189 struct vnode **a_vpp; 190 struct componentname *a_cnp; 191 struct vattr *a_vap; 192 } */ *ap; 193 { 194 int error; 195 196 switch (ap->a_vap->va_type) { 197 case VDIR: 198 error = msdosfs_mkdir((struct vop_mkdir_args *)ap); 199 break; 200 201 case VREG: 202 error = msdosfs_create((struct vop_create_args *)ap); 203 break; 204 205 default: 206 error = EINVAL; 207 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 208 vput(ap->a_dvp); 209 break; 210 } 211 return error; 212 } 213 214 static int 215 msdosfs_open(ap) 216 struct vop_open_args /* { 217 struct vnode *a_vp; 218 int a_mode; 219 struct ucred *a_cred; 220 struct proc *a_p; 221 } */ *ap; 222 { 223 return 0; 224 } 225 226 static int 227 msdosfs_close(ap) 228 struct vop_close_args /* { 229 struct vnode *a_vp; 230 int a_fflag; 231 struct ucred *a_cred; 232 struct proc *a_p; 233 } */ *ap; 234 { 235 struct vnode *vp = ap->a_vp; 236 struct denode *dep = VTODE(vp); 237 238 if (vp->v_usecount > 1 && !(dep->de_flag & DE_LOCKED)) 239 DE_TIMES(dep, &time); 240 return 0; 241 } 242 243 static int 244 msdosfs_access(ap) 245 struct vop_access_args /* { 246 struct vnode *a_vp; 247 int a_mode; 248 struct ucred *a_cred; 249 struct proc *a_p; 250 } */ *ap; 251 { 252 struct vnode *vp = ap->a_vp; 253 struct denode *dep = VTODE(ap->a_vp); 254 struct msdosfsmount *pmp = dep->de_pmp; 255 struct ucred *cred = ap->a_cred; 256 mode_t mask, file_mode, mode = ap->a_mode; 257 register gid_t *gp; 258 int i; 259 260 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 261 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 262 file_mode &= pmp->pm_mask; 263 264 /* 265 * Disallow write attempts on read-only file systems; 266 * unless the file is a socket, fifo, or a block or 267 * character device resident on the file system. 268 */ 269 if (mode & VWRITE) { 270 switch (vp->v_type) { 271 case VDIR: 272 case VLNK: 273 case VREG: 274 if (vp->v_mount->mnt_flag & MNT_RDONLY) 275 return (EROFS); 276 break; 277 } 278 } 279 280 /* User id 0 always gets access. */ 281 if (cred->cr_uid == 0) 282 return 0; 283 284 mask = 0; 285 286 /* Otherwise, check the owner. */ 287 if (cred->cr_uid == pmp->pm_uid) { 288 if (mode & VEXEC) 289 mask |= S_IXUSR; 290 if (mode & VREAD) 291 mask |= S_IRUSR; 292 if (mode & VWRITE) 293 mask |= S_IWUSR; 294 return (file_mode & mask) == mask ? 0 : EACCES; 295 } 296 297 /* Otherwise, check the groups. */ 298 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 299 if (pmp->pm_gid == *gp) { 300 if (mode & VEXEC) 301 mask |= S_IXGRP; 302 if (mode & VREAD) 303 mask |= S_IRGRP; 304 if (mode & VWRITE) 305 mask |= S_IWGRP; 306 return (file_mode & mask) == mask ? 0 : EACCES; 307 } 308 309 /* Otherwise, check everyone else. */ 310 if (mode & VEXEC) 311 mask |= S_IXOTH; 312 if (mode & VREAD) 313 mask |= S_IROTH; 314 if (mode & VWRITE) 315 mask |= S_IWOTH; 316 return (file_mode & mask) == mask ? 0 : EACCES; 317 } 318 319 static int 320 msdosfs_getattr(ap) 321 struct vop_getattr_args /* { 322 struct vnode *a_vp; 323 struct vattr *a_vap; 324 struct ucred *a_cred; 325 struct proc *a_p; 326 } */ *ap; 327 { 328 u_int cn; 329 struct denode *dep = VTODE(ap->a_vp); 330 struct vattr *vap = ap->a_vap; 331 332 DE_TIMES(dep, &time); 333 vap->va_fsid = dep->de_dev; 334 /* 335 * The following computation of the fileid must be the same as that 336 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 337 * doesn't work. 338 */ 339 if (dep->de_Attributes & ATTR_DIRECTORY) { 340 if ((cn = dep->de_StartCluster) == MSDOSFSROOT) 341 cn = 1; 342 } else { 343 if ((cn = dep->de_dirclust) == MSDOSFSROOT) 344 cn = 1; 345 cn = (cn << 16) | (dep->de_diroffset & 0xffff); 346 } 347 vap->va_fileid = cn; 348 vap->va_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 349 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 350 vap->va_mode &= dep->de_pmp->pm_mask; 351 if (dep->de_Attributes & ATTR_DIRECTORY) 352 vap->va_mode |= S_IFDIR; 353 vap->va_nlink = 1; 354 vap->va_gid = dep->de_pmp->pm_gid; 355 vap->va_uid = dep->de_pmp->pm_uid; 356 vap->va_rdev = 0; 357 vap->va_size = dep->de_FileSize; 358 dos2unixtime(dep->de_Date, dep->de_Time, &vap->va_atime); 359 vap->va_mtime = vap->va_atime; 360 #if 0 361 #ifndef MSDOSFS_NODIRMOD 362 if (vap->va_mode & S_IFDIR) 363 TIMEVAL_TO_TIMESPEC(&time, &vap->va_mtime); 364 #endif 365 #endif 366 vap->va_ctime = vap->va_atime; 367 vap->va_flags = (dep->de_Attributes & ATTR_ARCHIVE) ? 0 : SF_ARCHIVED; 368 vap->va_gen = 0; 369 vap->va_blocksize = dep->de_pmp->pm_bpcluster; 370 vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) & 371 ~(dep->de_pmp->pm_crbomask); 372 vap->va_type = ap->a_vp->v_type; 373 vap->va_filerev = dep->de_modrev; 374 return 0; 375 } 376 377 static int 378 msdosfs_setattr(ap) 379 struct vop_setattr_args /* { 380 struct vnode *a_vp; 381 struct vattr *a_vap; 382 struct ucred *a_cred; 383 struct proc *a_p; 384 } */ *ap; 385 { 386 struct vnode *vp = ap->a_vp; 387 struct denode *dep = VTODE(ap->a_vp); 388 struct vattr *vap = ap->a_vap; 389 struct ucred *cred = ap->a_cred; 390 int error = 0; 391 392 /* 393 * Check for unsettable attributes. 394 */ 395 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 396 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 397 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 398 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 399 return (EINVAL); 400 } 401 if (vap->va_flags != VNOVAL) { 402 if (vp->v_mount->mnt_flag & MNT_RDONLY) 403 return (EROFS); 404 if (cred->cr_uid != dep->de_pmp->pm_uid && 405 (error = suser(cred, &ap->a_p->p_acflag))) 406 return (error); 407 /* 408 * We are very inconsistent about handling unsupported 409 * attributes. We ignored the the access time and the 410 * read and execute bits. We were strict for the other 411 * attributes. 412 * 413 * Here we are strict, stricter than ufs in not allowing 414 * users to attempt to set SF_SETTABLE bits or anyone to 415 * set unsupported bits. However, we ignore attempts to 416 * set ATTR_ARCHIVE for directories `cp -pr' from a more 417 * sensible file system attempts it a lot. 418 */ 419 if (cred->cr_uid != 0) { 420 if (vap->va_flags & SF_SETTABLE) 421 return EPERM; 422 } 423 if (vap->va_flags & ~SF_ARCHIVED) 424 return EINVAL; 425 if (vap->va_flags & SF_ARCHIVED) 426 dep->de_Attributes &= ~ATTR_ARCHIVE; 427 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 428 dep->de_Attributes |= ATTR_ARCHIVE; 429 dep->de_flag |= DE_MODIFIED; 430 } 431 432 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 433 if (vp->v_mount->mnt_flag & MNT_RDONLY) 434 return (EROFS); 435 if ((cred->cr_uid != dep->de_pmp->pm_uid || 436 vap->va_uid != dep->de_pmp->pm_uid || 437 (vap->va_gid != dep->de_pmp->pm_gid && 438 !groupmember(vap->va_gid, cred))) && 439 (error = suser(cred, &ap->a_p->p_acflag))) 440 return error; 441 if (vap->va_uid != dep->de_pmp->pm_uid || 442 vap->va_gid != dep->de_pmp->pm_gid) 443 return EINVAL; 444 } 445 if (vap->va_size != VNOVAL) { 446 /* 447 * Disallow write attempts on read-only file systems; 448 * unless the file is a socket, fifo, or a block or 449 * character device resident on the file system. 450 */ 451 switch (vp->v_type) { 452 case VDIR: 453 return (EISDIR); 454 case VLNK: 455 case VREG: 456 if (vp->v_mount->mnt_flag & MNT_RDONLY) 457 return (EROFS); 458 break; 459 } 460 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 461 if (error) 462 return error; 463 } 464 if (vap->va_mtime.ts_sec != VNOVAL) { 465 if (vp->v_mount->mnt_flag & MNT_RDONLY) 466 return (EROFS); 467 if (cred->cr_uid != dep->de_pmp->pm_uid && 468 (error = suser(cred, &ap->a_p->p_acflag)) && 469 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 470 (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_p)))) 471 return error; 472 dep->de_flag |= DE_UPDATE; 473 error = deupdat(dep, &vap->va_mtime, 1); 474 if (error) 475 return error; 476 } 477 478 /* 479 * DOS files only have the ability to have their writability 480 * attribute set, so we use the owner write bit to set the readonly 481 * attribute. 482 */ 483 error = 0; 484 if (vap->va_mode != (u_short) VNOVAL) { 485 if (vp->v_mount->mnt_flag & MNT_RDONLY) 486 return (EROFS); 487 if (cred->cr_uid != dep->de_pmp->pm_uid && 488 (error = suser(cred, &ap->a_p->p_acflag))) 489 return error; 490 491 /* We ignore the read and execute bits */ 492 if (vap->va_mode & VWRITE) 493 dep->de_Attributes &= ~ATTR_READONLY; 494 else 495 dep->de_Attributes |= ATTR_READONLY; 496 dep->de_flag |= DE_MODIFIED; 497 } 498 return error; 499 } 500 501 static int 502 msdosfs_read(ap) 503 struct vop_read_args /* { 504 struct vnode *a_vp; 505 struct uio *a_uio; 506 int a_ioflag; 507 struct ucred *a_cred; 508 } */ *ap; 509 { 510 int error = 0; 511 int diff; 512 int isadir; 513 long n; 514 long on; 515 daddr_t lbn; 516 daddr_t rablock; 517 int rasize; 518 struct buf *bp; 519 struct vnode *vp = ap->a_vp; 520 struct denode *dep = VTODE(vp); 521 struct msdosfsmount *pmp = dep->de_pmp; 522 struct uio *uio = ap->a_uio; 523 524 /* 525 * If they didn't ask for any data, then we are done. 526 */ 527 if (uio->uio_resid == 0) 528 return 0; 529 if (uio->uio_offset < 0) 530 return EINVAL; 531 532 isadir = dep->de_Attributes & ATTR_DIRECTORY; 533 do { 534 lbn = uio->uio_offset >> pmp->pm_cnshift; 535 on = uio->uio_offset & pmp->pm_crbomask; 536 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 537 diff = dep->de_FileSize - uio->uio_offset; 538 if (diff <= 0) 539 return 0; 540 /* convert cluster # to block # if a directory */ 541 if (isadir) { 542 error = pcbmap(dep, lbn, &lbn, 0); 543 if (error) 544 return error; 545 } 546 if (diff < n) 547 n = diff; 548 /* 549 * If we are operating on a directory file then be sure to 550 * do i/o with the vnode for the filesystem instead of the 551 * vnode for the directory. 552 */ 553 if (isadir) { 554 error = bread(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 555 NOCRED, &bp); 556 } else { 557 rablock = lbn + 1; 558 if (vp->v_lastr + 1 == lbn && 559 rablock * pmp->pm_bpcluster < dep->de_FileSize) { 560 rasize = pmp->pm_bpcluster; 561 error = breadn(vp, lbn, pmp->pm_bpcluster, 562 &rablock, &rasize, 1, 563 NOCRED, &bp); 564 } else { 565 error = bread(vp, lbn, pmp->pm_bpcluster, NOCRED, 566 &bp); 567 } 568 vp->v_lastr = lbn; 569 } 570 n = min(n, pmp->pm_bpcluster - bp->b_resid); 571 if (error) { 572 brelse(bp); 573 return error; 574 } 575 error = uiomove(bp->b_data + on, (int) n, uio); 576 /* 577 * If we have read everything from this block or have read 578 * to end of file then we are done with this block. Mark 579 * it to say the buffer can be reused if need be. 580 */ 581 #if 0 582 if (n + on == pmp->pm_bpcluster || 583 uio->uio_offset == dep->de_FileSize) 584 bp->b_flags |= B_AGE; 585 #endif 586 brelse(bp); 587 } while (error == 0 && uio->uio_resid > 0 && n != 0); 588 return error; 589 } 590 591 /* 592 * Write data to a file or directory. 593 */ 594 static int 595 msdosfs_write(ap) 596 struct vop_write_args /* { 597 struct vnode *a_vp; 598 struct uio *a_uio; 599 int a_ioflag; 600 struct ucred *a_cred; 601 } */ *ap; 602 { 603 int n; 604 int isadir; 605 int croffset; 606 int resid; 607 int osize; 608 int error = 0; 609 u_long count; 610 daddr_t bn, lastcn; 611 struct buf *bp; 612 int ioflag = ap->a_ioflag; 613 struct uio *uio = ap->a_uio; 614 struct proc *p = uio->uio_procp; 615 struct vnode *vp = ap->a_vp; 616 struct vnode *thisvp; 617 struct denode *dep = VTODE(vp); 618 struct msdosfsmount *pmp = dep->de_pmp; 619 struct ucred *cred = ap->a_cred; 620 struct timespec ts; 621 622 #ifdef MSDOSFS_DEBUG 623 printf("msdosfs_write(vp %08x, uio %08x, ioflag %08x, cred %08x\n", 624 vp, uio, ioflag, cred); 625 printf("msdosfs_write(): diroff %d, dirclust %d, startcluster %d\n", 626 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 627 #endif 628 629 switch (vp->v_type) { 630 case VREG: 631 if (ioflag & IO_APPEND) 632 uio->uio_offset = dep->de_FileSize; 633 isadir = 0; 634 thisvp = vp; 635 break; 636 637 case VDIR: 638 if ((ioflag & IO_SYNC) == 0) 639 panic("msdosfs_write(): non-sync directory update"); 640 isadir = 1; 641 thisvp = pmp->pm_devvp; 642 break; 643 644 default: 645 panic("msdosfs_write(): bad file type"); 646 break; 647 } 648 649 if (uio->uio_offset < 0) 650 return EINVAL; 651 652 if (uio->uio_resid == 0) 653 return 0; 654 655 /* 656 * If they've exceeded their filesize limit, tell them about it. 657 */ 658 if (vp->v_type == VREG && p && 659 ((uio->uio_offset + uio->uio_resid) > 660 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 661 psignal(p, SIGXFSZ); 662 return EFBIG; 663 } 664 665 /* 666 * If attempting to write beyond the end of the root directory we 667 * stop that here because the root directory can not grow. 668 */ 669 if ((dep->de_Attributes & ATTR_DIRECTORY) && 670 dep->de_StartCluster == MSDOSFSROOT && 671 (uio->uio_offset + uio->uio_resid) > dep->de_FileSize) 672 return ENOSPC; 673 674 /* 675 * If the offset we are starting the write at is beyond the end of 676 * the file, then they've done a seek. Unix filesystems allow 677 * files with holes in them, DOS doesn't so we must fill the hole 678 * with zeroed blocks. 679 */ 680 if (uio->uio_offset > dep->de_FileSize) { 681 error = deextend(dep, uio->uio_offset, cred); 682 if (error) 683 return error; 684 } 685 686 /* 687 * Remember some values in case the write fails. 688 */ 689 resid = uio->uio_resid; 690 osize = dep->de_FileSize; 691 692 693 /* 694 * If we write beyond the end of the file, extend it to its ultimate 695 * size ahead of the time to hopefully get a contiguous area. 696 */ 697 if (uio->uio_offset + resid > osize) { 698 count = de_clcount(pmp, uio->uio_offset + resid) - de_clcount(pmp, osize); 699 if ((error = extendfile(dep, count, NULL, NULL, 0)) 700 && (error != ENOSPC || (ioflag & IO_UNIT))) 701 goto errexit; 702 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 703 } else 704 lastcn = de_clcount(pmp, osize) - 1; 705 706 do { 707 bn = de_blk(pmp, uio->uio_offset); 708 if (isadir) { 709 error = pcbmap(dep, bn, &bn, 0); 710 if (error) 711 break; 712 } else if (bn > lastcn) { 713 error = ENOSPC; 714 break; 715 } 716 717 if ((uio->uio_offset & pmp->pm_crbomask) == 0 718 && (de_blk(pmp, uio->uio_offset + uio->uio_resid) > de_blk(pmp, uio->uio_offset) 719 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 720 /* 721 * If either the whole cluster gets written, 722 * or we write the cluster from its start beyond EOF, 723 * then no need to read data from disk. 724 */ 725 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 726 clrbuf(bp); 727 /* 728 * Do the bmap now, since pcbmap needs buffers 729 * for the fat table. (see msdosfs_strategy) 730 */ 731 if (!isadir) { 732 if (bp->b_blkno == bp->b_lblkno) { 733 error = pcbmap(dep, bp->b_lblkno, 734 &bp->b_blkno, 0); 735 if (error) 736 bp->b_blkno = -1; 737 } 738 if (bp->b_blkno == -1) { 739 brelse(bp); 740 if (!error) 741 error = EIO; /* XXX */ 742 break; 743 } 744 } 745 } else { 746 /* 747 * The block we need to write into exists, so read it in. 748 */ 749 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 750 if (error) 751 break; 752 } 753 754 croffset = uio->uio_offset & pmp->pm_crbomask; 755 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 756 if (uio->uio_offset + n > dep->de_FileSize) { 757 dep->de_FileSize = uio->uio_offset + n; 758 vnode_pager_setsize(vp, dep->de_FileSize); /* why? */ 759 } 760 /* 761 * Should these vnode_pager_* functions be done on dir 762 * files? 763 */ 764 765 /* 766 * Copy the data from user space into the buf header. 767 */ 768 error = uiomove(bp->b_data + croffset, n, uio); 769 770 /* 771 * If they want this synchronous then write it and wait for 772 * it. Otherwise, if on a cluster boundary write it 773 * asynchronously so we can move on to the next block 774 * without delay. Otherwise do a delayed write because we 775 * may want to write somemore into the block later. 776 */ 777 if (ioflag & IO_SYNC) 778 (void) bwrite(bp); 779 else if (n + croffset == pmp->pm_bpcluster) { 780 bawrite(bp); 781 } else 782 bdwrite(bp); 783 dep->de_flag |= DE_UPDATE; 784 } while (error == 0 && uio->uio_resid > 0); 785 786 /* 787 * If the write failed and they want us to, truncate the file back 788 * to the size it was before the write was attempted. 789 */ 790 errexit: 791 if (error) { 792 if (ioflag & IO_UNIT) { 793 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 794 uio->uio_offset -= resid - uio->uio_resid; 795 uio->uio_resid = resid; 796 } else { 797 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 798 if (uio->uio_resid != resid) 799 error = 0; 800 } 801 } else { 802 TIMEVAL_TO_TIMESPEC(&time, &ts); 803 error = deupdat(dep, &ts, 1); 804 } 805 return error; 806 } 807 808 static int 809 msdosfs_ioctl(ap) 810 struct vop_ioctl_args /* { 811 struct vnode *a_vp; 812 int a_command; 813 caddr_t a_data; 814 int a_fflag; 815 struct ucred *a_cred; 816 struct proc *a_p; 817 } */ *ap; 818 { 819 return ENOTTY; 820 } 821 822 static int 823 msdosfs_select(ap) 824 struct vop_select_args /* { 825 struct vnode *a_vp; 826 int a_which; 827 int a_fflags; 828 struct ucred *a_cred; 829 struct proc *a_p; 830 } */ *ap; 831 { 832 return 1; /* DOS filesystems never block? */ 833 } 834 835 static int 836 msdosfs_mmap(ap) 837 struct vop_mmap_args /* { 838 struct vnode *a_vp; 839 int a_fflags; 840 struct ucred *a_cred; 841 struct proc *a_p; 842 } */ *ap; 843 { 844 return EINVAL; 845 } 846 847 /* 848 * Flush the blocks of a file to disk. 849 * 850 * This function is worthless for vnodes that represent directories. Maybe we 851 * could just do a sync if they try an fsync on a directory file. 852 */ 853 static int 854 msdosfs_fsync(ap) 855 struct vop_fsync_args /* { 856 struct vnode *a_vp; 857 struct ucred *a_cred; 858 int a_waitfor; 859 struct proc *a_p; 860 } */ *ap; 861 { 862 register struct vnode *vp = ap->a_vp; 863 register struct buf *bp; 864 int wait = ap->a_waitfor == MNT_WAIT; 865 struct timespec ts; 866 struct buf *nbp; 867 int s; 868 869 /* 870 * Flush all dirty buffers associated with a vnode. 871 */ 872 loop: 873 s = splbio(); 874 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 875 nbp = bp->b_vnbufs.le_next; 876 if ((bp->b_flags & B_BUSY)) 877 continue; 878 if ((bp->b_flags & B_DELWRI) == 0) 879 panic("msdosfs_fsync: not dirty"); 880 bremfree(bp); 881 bp->b_flags |= B_BUSY; 882 splx(s); 883 (void) bwrite(bp); 884 goto loop; 885 } 886 while (vp->v_numoutput) { 887 vp->v_flag |= VBWAIT; 888 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 889 } 890 #ifdef DIAGNOSTIC 891 if (vp->v_dirtyblkhd.lh_first) { 892 vprint("msdosfs_fsync: dirty", vp); 893 goto loop; 894 } 895 #endif 896 splx(s); 897 TIMEVAL_TO_TIMESPEC(&time, &ts); 898 return deupdat(VTODE(vp), &ts, wait); 899 } 900 901 /* 902 * Now the whole work of extending a file is done in the write function. 903 * So nothing to do here. 904 */ 905 static int 906 msdosfs_seek(ap) 907 struct vop_seek_args /* { 908 struct vnode *a_vp; 909 off_t a_oldoff; 910 off_t a_newoff; 911 struct ucred *a_cred; 912 } */ *ap; 913 { 914 return 0; 915 } 916 917 static int 918 msdosfs_remove(ap) 919 struct vop_remove_args /* { 920 struct vnode *a_dvp; 921 struct vnode *a_vp; 922 struct componentname *a_cnp; 923 } */ *ap; 924 { 925 int error; 926 struct denode *dep = VTODE(ap->a_vp); 927 struct denode *ddep = VTODE(ap->a_dvp); 928 929 error = removede(ddep,dep); 930 #ifdef MSDOSFS_DEBUG 931 printf("msdosfs_remove(), dep %08x, v_usecount %d\n", dep, ap->a_vp->v_usecount); 932 #endif 933 if (ddep == dep) 934 vrele(ap->a_vp); 935 else 936 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 937 * via vrele() */ 938 vput(ap->a_dvp); 939 return error; 940 } 941 942 /* 943 * DOS filesystems don't know what links are. But since we already called 944 * msdosfs_lookup() with create and lockparent, the parent is locked so we 945 * have to free it before we return the error. 946 */ 947 static int 948 msdosfs_link(ap) 949 struct vop_link_args /* { 950 struct vnode *a_tdvp; 951 struct vnode *a_vp; 952 struct componentname *a_cnp; 953 } */ *ap; 954 { 955 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 956 vput(ap->a_tdvp); 957 return EOPNOTSUPP; 958 } 959 960 /* 961 * Renames on files require moving the denode to a new hash queue since the 962 * denode's location is used to compute which hash queue to put the file 963 * in. Unless it is a rename in place. For example "mv a b". 964 * 965 * What follows is the basic algorithm: 966 * 967 * if (file move) { 968 * if (dest file exists) { 969 * remove dest file 970 * } 971 * if (dest and src in same directory) { 972 * rewrite name in existing directory slot 973 * } else { 974 * write new entry in dest directory 975 * update offset and dirclust in denode 976 * move denode to new hash chain 977 * clear old directory entry 978 * } 979 * } else { 980 * directory move 981 * if (dest directory exists) { 982 * if (dest is not empty) { 983 * return ENOTEMPTY 984 * } 985 * remove dest directory 986 * } 987 * if (dest and src in same directory) { 988 * rewrite name in existing entry 989 * } else { 990 * be sure dest is not a child of src directory 991 * write entry in dest directory 992 * update "." and ".." in moved directory 993 * clear old directory entry for moved directory 994 * } 995 * } 996 * 997 * On entry: 998 * source's parent directory is unlocked 999 * source file or directory is unlocked 1000 * destination's parent directory is locked 1001 * destination file or directory is locked if it exists 1002 * 1003 * On exit: 1004 * all denodes should be released 1005 * 1006 * Notes: 1007 * I'm not sure how the memory containing the pathnames pointed at by the 1008 * componentname structures is freed, there may be some memory bleeding 1009 * for each rename done. 1010 */ 1011 static int 1012 msdosfs_rename(ap) 1013 struct vop_rename_args /* { 1014 struct vnode *a_fdvp; 1015 struct vnode *a_fvp; 1016 struct componentname *a_fcnp; 1017 struct vnode *a_tdvp; 1018 struct vnode *a_tvp; 1019 struct componentname *a_tcnp; 1020 } */ *ap; 1021 { 1022 u_char toname[11]; 1023 int error; 1024 int newparent = 0; 1025 int sourceisadirectory = 0; 1026 u_long cn; 1027 daddr_t bn; 1028 struct vnode *tvp = ap->a_tvp; 1029 struct denode *fddep; /* from file's parent directory */ 1030 struct denode *fdep; /* from file or directory */ 1031 struct denode *tddep; /* to file's parent directory */ 1032 struct denode *tdep; /* to file or directory */ 1033 struct msdosfsmount *pmp; 1034 struct direntry *dotdotp; 1035 struct direntry *ep; 1036 struct buf *bp; 1037 1038 fddep = VTODE(ap->a_fdvp); 1039 fdep = VTODE(ap->a_fvp); 1040 tddep = VTODE(ap->a_tdvp); 1041 tdep = tvp ? VTODE(tvp) : NULL; 1042 pmp = fddep->de_pmp; 1043 1044 /* Check for cross-device rename */ 1045 if ((ap->a_fvp->v_mount != ap->a_tdvp->v_mount) || 1046 (tvp && (ap->a_fvp->v_mount != tvp->v_mount))) { 1047 error = EXDEV; 1048 goto bad; 1049 } 1050 1051 /* 1052 * Convert the filename in tcnp into a dos filename. We copy this 1053 * into the denode and directory entry for the destination 1054 * file/directory. 1055 */ 1056 unix2dosfn((u_char *) ap->a_tcnp->cn_nameptr, 1057 toname, ap->a_tcnp->cn_namelen); 1058 1059 /* 1060 * At this point this is the lock state of the denodes: 1061 * fddep referenced 1062 * fdep referenced 1063 * tddep locked 1064 * tdep locked if it exists 1065 */ 1066 1067 /* 1068 * Be sure we are not renaming ".", "..", or an alias of ".". This 1069 * leads to a crippled directory tree. It's pretty tough to do a 1070 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1071 * doesn't work if the ".." entry is missing. 1072 */ 1073 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1074 if ((ap->a_fcnp->cn_namelen == 1 1075 && ap->a_fcnp->cn_nameptr[0] == '.') 1076 || fddep == fdep 1077 || (ap->a_fcnp->cn_flags | ap->a_tcnp->cn_flags) 1078 & ISDOTDOT) { 1079 VOP_ABORTOP(ap->a_tdvp, ap->a_tcnp); 1080 vput(ap->a_tdvp); 1081 if (tvp) 1082 vput(tvp); 1083 VOP_ABORTOP(ap->a_fdvp, ap->a_fcnp); 1084 vrele(ap->a_fdvp); 1085 vrele(ap->a_fvp); 1086 return EINVAL; 1087 } 1088 sourceisadirectory = 1; 1089 } 1090 1091 /* 1092 * If we are renaming a directory, and the directory is being moved 1093 * to another directory, then we must be sure the destination 1094 * directory is not in the subtree of the source directory. This 1095 * could orphan everything under the source directory. 1096 * doscheckpath() unlocks the destination's parent directory so we 1097 * must look it up again to relock it. 1098 */ 1099 if (fddep->de_StartCluster != tddep->de_StartCluster) 1100 newparent = 1; 1101 if (sourceisadirectory && newparent) { 1102 if (tdep) { 1103 vput(ap->a_tvp); 1104 tdep = NULL; 1105 } 1106 /* doscheckpath() vput()'s tddep */ 1107 error = doscheckpath(fdep, tddep); 1108 tddep = NULL; 1109 if (error) 1110 goto bad; 1111 if ((ap->a_tcnp->cn_flags & SAVESTART) == 0) 1112 panic("msdosfs_rename(): lost to startdir"); 1113 error = relookup(ap->a_tdvp, &tvp, ap->a_tcnp); 1114 if (error) 1115 goto bad; 1116 tddep = VTODE(ap->a_tdvp); 1117 tdep = tvp ? VTODE(tvp) : NULL; 1118 } 1119 1120 /* 1121 * If the destination exists, then be sure its type (file or dir) 1122 * matches that of the source. And, if it is a directory make sure 1123 * it is empty. Then delete the destination. 1124 */ 1125 if (tdep) { 1126 if (tdep->de_Attributes & ATTR_DIRECTORY) { 1127 if (!sourceisadirectory) { 1128 error = ENOTDIR; 1129 goto bad; 1130 } 1131 if (!dosdirempty(tdep)) { 1132 error = ENOTEMPTY; 1133 goto bad; 1134 } 1135 cache_purge(DETOV(tddep)); 1136 } else { /* destination is file */ 1137 if (sourceisadirectory) { 1138 error = EISDIR; 1139 goto bad; 1140 } 1141 } 1142 error = removede(tddep,tdep); 1143 if (error) 1144 goto bad; 1145 vput(ap->a_tvp); 1146 tdep = NULL; 1147 } 1148 1149 /* 1150 * If the source and destination are in the same directory then 1151 * just read in the directory entry, change the name in the 1152 * directory entry and write it back to disk. 1153 */ 1154 if (newparent == 0) { 1155 /* tddep and fddep point to the same denode here */ 1156 VOP_LOCK(ap->a_fvp); /* ap->a_fdvp is already locked */ 1157 error = readep(fddep->de_pmp, fdep->de_dirclust, 1158 fdep->de_diroffset, &bp, &ep); 1159 if (error) { 1160 VOP_UNLOCK(ap->a_fvp); 1161 goto bad; 1162 } 1163 bcopy(toname, ep->deName, 11); 1164 error = bwrite(bp); 1165 if (error) { 1166 VOP_UNLOCK(ap->a_fvp); 1167 goto bad; 1168 } 1169 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1170 /* 1171 * fdep locked fddep and tddep point to the same denode 1172 * which is locked tdep is NULL 1173 */ 1174 } else { 1175 u_long dirsize = 0L; 1176 1177 /* 1178 * If the source and destination are in different 1179 * directories, then mark the entry in the source directory 1180 * as deleted and write a new entry in the destination 1181 * directory. Then move the denode to the correct hash 1182 * chain for its new location in the filesystem. And, if 1183 * we moved a directory, then update its .. entry to point 1184 * to the new parent directory. If we moved a directory 1185 * will also insure that the directory entry on disk has a 1186 * filesize of zero. 1187 */ 1188 VOP_LOCK(ap->a_fvp); 1189 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1190 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1191 dirsize = fdep->de_FileSize; 1192 fdep->de_FileSize = 0; 1193 } 1194 error = createde(fdep, tddep, (struct denode **) 0); 1195 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1196 fdep->de_FileSize = dirsize; 1197 } 1198 if (error) { 1199 /* should put back filename */ 1200 VOP_UNLOCK(ap->a_fvp); 1201 goto bad; 1202 } 1203 VOP_LOCK(ap->a_fdvp); 1204 error = readep(fddep->de_pmp, fddep->de_fndclust, 1205 fddep->de_fndoffset, &bp, &ep); 1206 if (error) { 1207 VOP_UNLOCK(ap->a_fvp); 1208 VOP_UNLOCK(ap->a_fdvp); 1209 goto bad; 1210 } 1211 ep->deName[0] = SLOT_DELETED; 1212 error = bwrite(bp); 1213 if (error) { 1214 VOP_UNLOCK(ap->a_fvp); 1215 VOP_UNLOCK(ap->a_fdvp); 1216 goto bad; 1217 } 1218 if (!sourceisadirectory) { 1219 fdep->de_dirclust = tddep->de_fndclust; 1220 fdep->de_diroffset = tddep->de_fndoffset; 1221 reinsert(fdep); 1222 } 1223 VOP_UNLOCK(ap->a_fdvp); 1224 } 1225 /* fdep is still locked here */ 1226 1227 /* 1228 * If we moved a directory to a new parent directory, then we must 1229 * fixup the ".." entry in the moved directory. 1230 */ 1231 if (sourceisadirectory && newparent) { 1232 cn = fdep->de_StartCluster; 1233 if (cn == MSDOSFSROOT) { 1234 /* this should never happen */ 1235 panic("msdosfs_rename(): updating .. in root directory?"); 1236 } else { 1237 bn = cntobn(pmp, cn); 1238 } 1239 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1240 NOCRED, &bp); 1241 if (error) { 1242 /* should really panic here, fs is corrupt */ 1243 VOP_UNLOCK(ap->a_fvp); 1244 goto bad; 1245 } 1246 dotdotp = (struct direntry *) bp->b_data + 1; 1247 putushort(dotdotp->deStartCluster, tddep->de_StartCluster); 1248 error = bwrite(bp); 1249 VOP_UNLOCK(ap->a_fvp); 1250 if (error) { 1251 /* should really panic here, fs is corrupt */ 1252 goto bad; 1253 } 1254 } else 1255 VOP_UNLOCK(ap->a_fvp); 1256 bad: ; 1257 vrele(DETOV(fdep)); 1258 vrele(DETOV(fddep)); 1259 if (tdep) 1260 vput(DETOV(tdep)); 1261 if (tddep) 1262 vput(DETOV(tddep)); 1263 return error; 1264 } 1265 1266 static struct { 1267 struct direntry dot; 1268 struct direntry dotdot; 1269 } dosdirtemplate = { 1270 { 1271 ". ", " ", /* the . entry */ 1272 ATTR_DIRECTORY, /* file attribute */ 1273 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1274 {210, 4}, {210, 4}, /* time and date */ 1275 {0, 0}, /* startcluster */ 1276 {0, 0, 0, 0}, /* filesize */ 1277 },{ 1278 ".. ", " ", /* the .. entry */ 1279 ATTR_DIRECTORY, /* file attribute */ 1280 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1281 {210, 4}, {210, 4}, /* time and date */ 1282 {0, 0}, /* startcluster */ 1283 {0, 0, 0, 0}, /* filesize */ 1284 } 1285 }; 1286 1287 static int 1288 msdosfs_mkdir(ap) 1289 struct vop_mkdir_args /* { 1290 struct vnode *a_dvp; 1291 struvt vnode **a_vpp; 1292 struvt componentname *a_cnp; 1293 struct vattr *a_vap; 1294 } */ *ap; 1295 { 1296 int bn; 1297 int error; 1298 u_long newcluster; 1299 struct denode *pdep; 1300 struct denode *ndep; 1301 struct direntry *denp; 1302 struct denode ndirent; 1303 struct msdosfsmount *pmp; 1304 struct buf *bp; 1305 struct timespec ts; 1306 u_short dDate, dTime; 1307 1308 pdep = VTODE(ap->a_dvp); 1309 1310 /* 1311 * If this is the root directory and there is no space left we 1312 * can't do anything. This is because the root directory can not 1313 * change size. 1314 */ 1315 if (pdep->de_StartCluster == MSDOSFSROOT && pdep->de_fndclust == (u_long)-1) { 1316 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1317 vput(ap->a_dvp); 1318 return ENOSPC; 1319 } 1320 1321 pmp = pdep->de_pmp; 1322 1323 /* 1324 * Allocate a cluster to hold the about to be created directory. 1325 */ 1326 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1327 if (error) { 1328 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1329 vput(ap->a_dvp); 1330 return error; 1331 } 1332 1333 /* 1334 * Now fill the cluster with the "." and ".." entries. And write 1335 * the cluster to disk. This way it is there for the parent 1336 * directory to be pointing at if there were a crash. 1337 */ 1338 bn = cntobn(pmp, newcluster); 1339 /* always succeeds */ 1340 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1341 bzero(bp->b_data, pmp->pm_bpcluster); 1342 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1343 denp = (struct direntry *) bp->b_data; 1344 putushort(denp->deStartCluster, newcluster); 1345 TIMEVAL_TO_TIMESPEC(&time, &ts); 1346 unix2dostime(&ts, &dDate, &dTime); 1347 putushort(denp->deDate, dDate); 1348 putushort(denp->deTime, dTime); 1349 denp++; 1350 putushort(denp->deStartCluster, pdep->de_StartCluster); 1351 putushort(denp->deDate, dDate); 1352 putushort(denp->deTime, dTime); 1353 error = bwrite(bp); 1354 if (error) { 1355 clusterfree(pmp, newcluster, NULL); 1356 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1357 vput(ap->a_dvp); 1358 return error; 1359 } 1360 1361 /* 1362 * Now build up a directory entry pointing to the newly allocated 1363 * cluster. This will be written to an empty slot in the parent 1364 * directory. 1365 */ 1366 ndep = &ndirent; 1367 bzero(ndep, sizeof(*ndep)); 1368 unix2dosfn((u_char *)ap->a_cnp->cn_nameptr, 1369 ndep->de_Name, ap->a_cnp->cn_namelen); 1370 TIMEVAL_TO_TIMESPEC(&time, &ts); 1371 unix2dostime(&ts, &ndep->de_Date, &ndep->de_Time); 1372 ndep->de_StartCluster = newcluster; 1373 ndep->de_Attributes = ATTR_DIRECTORY; 1374 1375 error = createde(ndep, pdep, &ndep); 1376 if (error) { 1377 clusterfree(pmp, newcluster, NULL); 1378 } else { 1379 *ap->a_vpp = DETOV(ndep); 1380 } 1381 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1382 #ifdef MSDOSFS_DEBUG 1383 printf("msdosfs_mkdir(): vput(%08x)\n", ap->a_dvp); 1384 #endif 1385 vput(ap->a_dvp); 1386 return error; 1387 } 1388 1389 static int 1390 msdosfs_rmdir(ap) 1391 struct vop_rmdir_args /* { 1392 struct vnode *a_dvp; 1393 struct vnode *a_vp; 1394 struct componentname *a_cnp; 1395 } */ *ap; 1396 { 1397 struct denode *ddep; 1398 struct denode *dep; 1399 int error = 0; 1400 1401 ddep = VTODE(ap->a_dvp); /* parent dir of dir to delete */ 1402 dep = VTODE(ap->a_vp);/* directory to delete */ 1403 1404 /* 1405 * Don't let "rmdir ." go thru. 1406 */ 1407 if (ddep == dep) { 1408 vrele(ap->a_vp); 1409 vput(ap->a_vp); 1410 return EINVAL; 1411 } 1412 1413 /* 1414 * Be sure the directory being deleted is empty. 1415 */ 1416 if (dosdirempty(dep) == 0) { 1417 error = ENOTEMPTY; 1418 goto out; 1419 } 1420 1421 /* 1422 * Delete the entry from the directory. For dos filesystems this 1423 * gets rid of the directory entry on disk, the in memory copy 1424 * still exists but the de_refcnt is <= 0. This prevents it from 1425 * being found by deget(). When the vput() on dep is done we give 1426 * up access and eventually msdosfs_reclaim() will be called which 1427 * will remove it from the denode cache. 1428 */ 1429 error = removede(ddep,dep); 1430 if (error) 1431 goto out; 1432 1433 /* 1434 * This is where we decrement the link count in the parent 1435 * directory. Since dos filesystems don't do this we just purge 1436 * the name cache and let go of the parent directory denode. 1437 */ 1438 cache_purge(DETOV(ddep)); 1439 vput(ap->a_dvp); 1440 ap->a_dvp = NULL; 1441 1442 /* 1443 * Truncate the directory that is being deleted. 1444 */ 1445 error = detrunc(dep, (u_long) 0, IO_SYNC, NOCRED, NULL); 1446 cache_purge(DETOV(dep)); 1447 1448 out: ; 1449 if (ap->a_dvp) 1450 vput(ap->a_dvp); 1451 vput(ap->a_vp); 1452 return error; 1453 } 1454 1455 /* 1456 * DOS filesystems don't know what symlinks are. 1457 */ 1458 static int 1459 msdosfs_symlink(ap) 1460 struct vop_symlink_args /* { 1461 struct vnode *a_dvp; 1462 struct vnode **a_vpp; 1463 struct componentname *a_cnp; 1464 struct vattr *a_vap; 1465 char *a_target; 1466 } */ *ap; 1467 { 1468 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1469 vput(ap->a_dvp); 1470 return EINVAL; 1471 } 1472 1473 /* 1474 * Dummy dirents to simulate the "." and ".." entries of the root directory 1475 * in a dos filesystem. Dos doesn't provide these. Note that each entry 1476 * must be the same size as a dos directory entry (32 bytes). 1477 */ 1478 static struct dos_dirent { 1479 u_long d_fileno; 1480 u_short d_reclen; 1481 u_char d_type; 1482 u_char d_namlen; 1483 u_char d_name[24]; 1484 } rootdots[2] = { 1485 1486 { 1487 1, /* d_fileno */ 1488 sizeof(struct direntry), /* d_reclen */ 1489 DT_DIR, /* d_type */ 1490 1, /* d_namlen */ 1491 "." /* d_name */ 1492 }, 1493 { 1494 1, /* d_fileno */ 1495 sizeof(struct direntry), /* d_reclen */ 1496 DT_DIR, /* d_type */ 1497 2, /* d_namlen */ 1498 ".." /* d_name */ 1499 } 1500 }; 1501 1502 static int 1503 msdosfs_readdir(ap) 1504 struct vop_readdir_args /* { 1505 struct vnode *a_vp; 1506 struct uio *a_uio; 1507 struct ucred *a_cred; 1508 int *a_eofflag; 1509 u_int *a_cookies; 1510 int a_ncookies; 1511 } */ *ap; 1512 { 1513 int error = 0; 1514 int diff; 1515 char pushout; 1516 long n; 1517 long on; 1518 long lost; 1519 long count; 1520 u_long cn; 1521 u_long fileno; 1522 long bias = 0; 1523 daddr_t bn; 1524 daddr_t lbn; 1525 struct buf *bp; 1526 struct denode *dep = VTODE(ap->a_vp); 1527 struct msdosfsmount *pmp = dep->de_pmp; 1528 struct direntry *dentp; 1529 struct dirent *prev; 1530 struct dirent *crnt; 1531 u_char dirbuf[512]; /* holds converted dos directories */ 1532 struct uio *uio = ap->a_uio; 1533 off_t off; 1534 int ncookies = 0; 1535 1536 #ifdef MSDOSFS_DEBUG 1537 printf("msdosfs_readdir(): vp %08x, uio %08x, cred %08x, eofflagp %08x\n", 1538 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1539 #endif 1540 1541 /* 1542 * msdosfs_readdir() won't operate properly on regular files since 1543 * it does i/o only with the the filesystem vnode, and hence can 1544 * retrieve the wrong block from the buffer cache for a plain file. 1545 * So, fail attempts to readdir() on a plain file. 1546 */ 1547 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1548 return ENOTDIR; 1549 1550 /* 1551 * If the user buffer is smaller than the size of one dos directory 1552 * entry or the file offset is not a multiple of the size of a 1553 * directory entry, then we fail the read. 1554 */ 1555 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1556 lost = uio->uio_resid - count; 1557 if (count < sizeof(struct direntry) || 1558 (uio->uio_offset & (sizeof(struct direntry) - 1))) 1559 return EINVAL; 1560 uio->uio_resid = count; 1561 uio->uio_iov->iov_len = count; 1562 off = uio->uio_offset; 1563 1564 /* 1565 * If they are reading from the root directory then, we simulate 1566 * the . and .. entries since these don't exist in the root 1567 * directory. We also set the offset bias to make up for having to 1568 * simulate these entries. By this I mean that at file offset 64 we 1569 * read the first entry in the root directory that lives on disk. 1570 */ 1571 if (dep->de_StartCluster == MSDOSFSROOT) { 1572 /* 1573 * printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1574 * uio->uio_offset); 1575 */ 1576 bias = 2 * sizeof(struct direntry); 1577 if (uio->uio_offset < 2 * sizeof(struct direntry)) { 1578 if (uio->uio_offset 1579 && uio->uio_offset != sizeof(struct direntry)) { 1580 error = EINVAL; 1581 goto out; 1582 } 1583 n = 1; 1584 if (!uio->uio_offset) { 1585 n = 2; 1586 ncookies++; 1587 } 1588 ncookies++; 1589 error = uiomove((char *) rootdots + uio->uio_offset, 1590 n * sizeof(struct direntry), uio); 1591 } 1592 } 1593 while (!error && uio->uio_resid > 0) { 1594 lbn = (uio->uio_offset - bias) >> pmp->pm_cnshift; 1595 on = (uio->uio_offset - bias) & pmp->pm_crbomask; 1596 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 1597 diff = dep->de_FileSize - (uio->uio_offset - bias); 1598 if (diff <= 0) { 1599 if(ap->a_eofflag) 1600 *ap->a_eofflag = 1; 1601 if(ap->a_ncookies != NULL) { 1602 u_int *cookies; 1603 1604 MALLOC(cookies, u_int *, 1 * sizeof(u_int), 1605 M_TEMP, M_WAITOK); 1606 *ap->a_ncookies = 0; 1607 *ap->a_cookies = cookies; 1608 } 1609 return 0; 1610 } 1611 if (diff < n) 1612 n = diff; 1613 error = pcbmap(dep, lbn, &bn, &cn); 1614 if (error) 1615 break; 1616 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, NOCRED, &bp); 1617 n = min(n, pmp->pm_bpcluster - bp->b_resid); 1618 if (error) { 1619 brelse(bp); 1620 return error; 1621 } 1622 1623 /* 1624 * code to convert from dos directory entries to ufs 1625 * directory entries 1626 */ 1627 pushout = 0; 1628 dentp = (struct direntry *)(bp->b_data + on); 1629 prev = 0; 1630 crnt = (struct dirent *) dirbuf; 1631 while ((char *) dentp < bp->b_data + on + n) { 1632 /* 1633 * printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1634 * dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1635 */ 1636 /* 1637 * If we have an empty entry or a slot from a 1638 * deleted file, or a volume label entry just 1639 * concatenate its space onto the end of the 1640 * previous entry or, manufacture an empty entry if 1641 * there is no previous entry. 1642 */ 1643 if (dentp->deName[0] == SLOT_EMPTY || 1644 dentp->deName[0] == SLOT_DELETED || 1645 (dentp->deAttributes & ATTR_VOLUME)) { 1646 if (prev) { 1647 prev->d_reclen += sizeof(struct direntry); 1648 } else { 1649 prev = crnt; 1650 prev->d_fileno = 0; 1651 prev->d_reclen = sizeof(struct direntry); 1652 prev->d_type = DT_UNKNOWN; 1653 prev->d_namlen = 0; 1654 prev->d_name[0] = 0; 1655 ncookies++; 1656 } 1657 } else { 1658 /* 1659 * this computation of d_fileno must match 1660 * the computation of va_fileid in 1661 * msdosfs_getattr 1662 */ 1663 if (dentp->deAttributes & ATTR_DIRECTORY) { 1664 /* if this is the root directory */ 1665 fileno = getushort(dentp->deStartCluster); 1666 if (fileno == MSDOSFSROOT) 1667 fileno = 1; 1668 } else { 1669 /* 1670 * if the file's dirent lives in 1671 * root dir 1672 */ 1673 if ((fileno = cn) == MSDOSFSROOT) 1674 fileno = 1; 1675 fileno = (fileno << 16) | 1676 ((dentp - (struct direntry *) bp->b_data) & 0xffff); 1677 } 1678 crnt->d_fileno = fileno; 1679 crnt->d_reclen = sizeof(struct direntry); 1680 crnt->d_type = (dentp->deAttributes & ATTR_DIRECTORY) 1681 ? DT_DIR : DT_REG; 1682 crnt->d_namlen = dos2unixfn(dentp->deName, 1683 (u_char *)crnt->d_name); 1684 /* 1685 * printf("readdir: file %s, fileno %08x, attr %02x, start %08x\n", 1686 * crnt->d_name, crnt->d_fileno, dentp->deAttributes, 1687 * dentp->deStartCluster); 1688 */ 1689 prev = crnt; 1690 ncookies++; 1691 } 1692 dentp++; 1693 1694 crnt = (struct dirent *) ((char *) crnt + sizeof(struct direntry)); 1695 pushout = 1; 1696 1697 /* 1698 * If our intermediate buffer is full then copy its 1699 * contents to user space. I would just use the 1700 * buffer the buf header points to but, I'm afraid 1701 * that when we brelse() it someone else might find 1702 * it in the cache and think its contents are 1703 * valid. Maybe there is a way to invalidate the 1704 * buffer before brelse()'ing it. 1705 */ 1706 if ((u_char *) crnt >= &dirbuf[sizeof dirbuf]) { 1707 pushout = 0; 1708 error = uiomove(dirbuf, sizeof(dirbuf), uio); 1709 if (error) 1710 break; 1711 prev = 0; 1712 crnt = (struct dirent *) dirbuf; 1713 } 1714 } 1715 if (pushout) { 1716 pushout = 0; 1717 error = uiomove(dirbuf, (char *) crnt - (char *) dirbuf, 1718 uio); 1719 } 1720 1721 #if 0 1722 /* 1723 * If we have read everything from this block or have read 1724 * to end of file then we are done with this block. Mark 1725 * it to say the buffer can be reused if need be. 1726 */ 1727 if (n + on == pmp->pm_bpcluster || 1728 (uio->uio_offset - bias) == dep->de_FileSize) 1729 bp->b_flags |= B_AGE; 1730 #endif /* if 0 */ 1731 brelse(bp); 1732 if (n == 0) 1733 break; 1734 } 1735 out: ; 1736 uio->uio_resid += lost; 1737 if (!error && ap->a_ncookies != NULL) { 1738 struct dirent* dpStart; 1739 struct dirent* dpEnd; 1740 struct dirent* dp; 1741 u_int *cookies; 1742 u_int *cookiep; 1743 1744 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1745 panic("msdosfs_readdir: unexpected uio from NFS server"); 1746 dpStart = (struct dirent *) 1747 (uio->uio_iov->iov_base - (uio->uio_offset - off)); 1748 dpEnd = (struct dirent *) uio->uio_iov->iov_base; 1749 MALLOC(cookies, u_int *, ncookies * sizeof(u_int), 1750 M_TEMP, M_WAITOK); 1751 for (dp = dpStart, cookiep = cookies; 1752 dp < dpEnd; 1753 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 1754 off += dp->d_reclen; 1755 *cookiep++ = (u_int) off; 1756 } 1757 *ap->a_ncookies = ncookies; 1758 *ap->a_cookies = cookies; 1759 } 1760 1761 /* 1762 * Set the eofflag (NFS uses it) 1763 */ 1764 if (ap->a_eofflag) 1765 if (dep->de_FileSize - (uio->uio_offset - bias) <= 0) 1766 *ap->a_eofflag = 1; 1767 else 1768 *ap->a_eofflag = 0; 1769 1770 return error; 1771 } 1772 1773 /* 1774 * DOS filesystems don't know what symlinks are. 1775 */ 1776 static int 1777 msdosfs_readlink(ap) 1778 struct vop_readlink_args /* { 1779 struct vnode *a_vp; 1780 struct uio *a_uio; 1781 struct ucred *a_cred; 1782 } */ *ap; 1783 { 1784 return EINVAL; 1785 } 1786 1787 static int 1788 msdosfs_abortop(ap) 1789 struct vop_abortop_args /* { 1790 struct vnode *a_dvp; 1791 struct componentname *a_cnp; 1792 } */ *ap; 1793 { 1794 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1795 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 1796 return 0; 1797 } 1798 1799 static int 1800 msdosfs_lock(ap) 1801 struct vop_lock_args /* { 1802 struct vnode *a_vp; 1803 } */ *ap; 1804 { 1805 struct denode *dep = VTODE(ap->a_vp); 1806 1807 while (dep->de_flag & DE_LOCKED) { 1808 dep->de_flag |= DE_WANTED; 1809 if (dep->de_lockholder == curproc->p_pid) 1810 panic("msdosfs_lock: locking against myself"); 1811 dep->de_lockwaiter = curproc->p_pid; 1812 (void) tsleep((caddr_t) dep, PINOD, "msdlck", 0); 1813 } 1814 dep->de_lockwaiter = 0; 1815 dep->de_lockholder = curproc->p_pid; 1816 dep->de_flag |= DE_LOCKED; 1817 return 0; 1818 } 1819 1820 static int 1821 msdosfs_unlock(ap) 1822 struct vop_unlock_args /* { 1823 struct vnode *vp; 1824 } */ *ap; 1825 { 1826 struct denode *dep = VTODE(ap->a_vp); 1827 1828 if (!(dep->de_flag & DE_LOCKED)) 1829 panic("msdosfs_unlock: denode not locked"); 1830 dep->de_lockholder = 0; 1831 dep->de_flag &= ~DE_LOCKED; 1832 if (dep->de_flag & DE_WANTED) { 1833 dep->de_flag &= ~DE_WANTED; 1834 wakeup((caddr_t) dep); 1835 } 1836 return 0; 1837 } 1838 1839 static int 1840 msdosfs_islocked(ap) 1841 struct vop_islocked_args /* { 1842 struct vnode *a_vp; 1843 } */ *ap; 1844 { 1845 return VTODE(ap->a_vp)->de_flag & DE_LOCKED ? 1 : 0; 1846 } 1847 1848 /* 1849 * vp - address of vnode file the file 1850 * bn - which cluster we are interested in mapping to a filesystem block number. 1851 * vpp - returns the vnode for the block special file holding the filesystem 1852 * containing the file of interest 1853 * bnp - address of where to return the filesystem relative block number 1854 */ 1855 static int 1856 msdosfs_bmap(ap) 1857 struct vop_bmap_args /* { 1858 struct vnode *a_vp; 1859 daddr_t a_bn; 1860 struct vnode **a_vpp; 1861 daddr_t *a_bnp; 1862 int *a_runp; 1863 int *a_runb; 1864 } */ *ap; 1865 { 1866 struct denode *dep = VTODE(ap->a_vp); 1867 1868 if (ap->a_vpp != NULL) 1869 *ap->a_vpp = dep->de_devvp; 1870 if (ap->a_bnp == NULL) 1871 return 0; 1872 if (ap->a_runp) { 1873 /* 1874 * Sequential clusters should be counted here. 1875 */ 1876 *ap->a_runp = 0; 1877 } 1878 if (ap->a_runb) { 1879 *ap->a_runb = 0; 1880 } 1881 return pcbmap(dep, ap->a_bn, ap->a_bnp, 0); 1882 } 1883 1884 static int 1885 msdosfs_reallocblks(ap) 1886 struct vop_reallocblks_args /* { 1887 struct vnode *a_vp; 1888 struct cluster_save *a_buflist; 1889 } */ *ap; 1890 { 1891 /* Currently no support for clustering */ /* XXX */ 1892 return ENOSPC; 1893 } 1894 1895 static int 1896 msdosfs_strategy(ap) 1897 struct vop_strategy_args /* { 1898 struct buf *a_bp; 1899 } */ *ap; 1900 { 1901 struct buf *bp = ap->a_bp; 1902 struct denode *dep = VTODE(bp->b_vp); 1903 struct vnode *vp; 1904 int error = 0; 1905 1906 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1907 panic("msdosfs_strategy: spec"); 1908 /* 1909 * If we don't already know the filesystem relative block number 1910 * then get it using pcbmap(). If pcbmap() returns the block 1911 * number as -1 then we've got a hole in the file. DOS filesystems 1912 * don't allow files with holes, so we shouldn't ever see this. 1913 */ 1914 if (bp->b_blkno == bp->b_lblkno) { 1915 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0); 1916 if (error) 1917 bp->b_blkno = -1; 1918 if (bp->b_blkno == -1) 1919 clrbuf(bp); 1920 } 1921 if (bp->b_blkno == -1) { 1922 biodone(bp); 1923 return error; 1924 } 1925 #ifdef DIAGNOSTIC 1926 #endif 1927 /* 1928 * Read/write the block from/to the disk that contains the desired 1929 * file block. 1930 */ 1931 vp = dep->de_devvp; 1932 bp->b_dev = vp->v_rdev; 1933 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1934 return 0; 1935 } 1936 1937 static int 1938 msdosfs_print(ap) 1939 struct vop_print_args /* { 1940 struct vnode *vp; 1941 } */ *ap; 1942 { 1943 struct denode *dep = VTODE(ap->a_vp); 1944 1945 printf( 1946 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1947 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1948 printf(" dev %d, %d, %s\n", 1949 major(dep->de_dev), minor(dep->de_dev), 1950 dep->de_flag & DE_LOCKED ? "(LOCKED)" : ""); 1951 if (dep->de_lockholder) { 1952 printf(" owner pid %d", (int)dep->de_lockholder); 1953 if (dep->de_lockwaiter) 1954 printf(" waiting pid %d", (int)dep->de_lockwaiter); 1955 printf("\n"); 1956 } 1957 return 0; 1958 } 1959 1960 static int 1961 msdosfs_advlock(ap) 1962 struct vop_advlock_args /* { 1963 struct vnode *a_vp; 1964 caddr_t a_id; 1965 int a_op; 1966 struct flock *a_fl; 1967 int a_flags; 1968 } */ *ap; 1969 { 1970 return EINVAL; /* we don't do locking yet */ 1971 } 1972 1973 static int 1974 msdosfs_pathconf(ap) 1975 struct vop_pathconf_args /* { 1976 struct vnode *a_vp; 1977 int a_name; 1978 int *a_retval; 1979 } */ *ap; 1980 { 1981 switch (ap->a_name) { 1982 case _PC_LINK_MAX: 1983 *ap->a_retval = 1; 1984 return 0; 1985 case _PC_NAME_MAX: 1986 *ap->a_retval = 12; 1987 return 0; 1988 case _PC_PATH_MAX: 1989 *ap->a_retval = PATH_MAX; /* 255? */ 1990 return 0; 1991 case _PC_CHOWN_RESTRICTED: 1992 *ap->a_retval = 1; 1993 return 0; 1994 case _PC_NO_TRUNC: 1995 *ap->a_retval = 0; 1996 return 0; 1997 default: 1998 return EINVAL; 1999 } 2000 } 2001 2002 /* Global vfs data structures for msdosfs */ 2003 vop_t **msdosfs_vnodeop_p; 2004 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 2005 { &vop_default_desc, (vop_t *)vn_default_error }, 2006 { &vop_lookup_desc, (vop_t *)msdosfs_lookup }, /* lookup */ 2007 { &vop_create_desc, (vop_t *)msdosfs_create }, /* create */ 2008 { &vop_mknod_desc, (vop_t *)msdosfs_mknod }, /* mknod */ 2009 { &vop_open_desc, (vop_t *)msdosfs_open }, /* open */ 2010 { &vop_close_desc, (vop_t *)msdosfs_close }, /* close */ 2011 { &vop_access_desc, (vop_t *)msdosfs_access }, /* access */ 2012 { &vop_getattr_desc, (vop_t *)msdosfs_getattr }, /* getattr */ 2013 { &vop_setattr_desc, (vop_t *)msdosfs_setattr }, /* setattr */ 2014 { &vop_read_desc, (vop_t *)msdosfs_read }, /* read */ 2015 { &vop_write_desc, (vop_t *)msdosfs_write }, /* write */ 2016 { &vop_ioctl_desc, (vop_t *)msdosfs_ioctl }, /* ioctl */ 2017 { &vop_select_desc, (vop_t *)msdosfs_select }, /* select */ 2018 { &vop_mmap_desc, (vop_t *)msdosfs_mmap }, /* mmap */ 2019 { &vop_fsync_desc, (vop_t *)msdosfs_fsync }, /* fsync */ 2020 { &vop_seek_desc, (vop_t *)msdosfs_seek }, /* seek */ 2021 { &vop_remove_desc, (vop_t *)msdosfs_remove }, /* remove */ 2022 { &vop_link_desc, (vop_t *)msdosfs_link }, /* link */ 2023 { &vop_rename_desc, (vop_t *)msdosfs_rename }, /* rename */ 2024 { &vop_mkdir_desc, (vop_t *)msdosfs_mkdir }, /* mkdir */ 2025 { &vop_rmdir_desc, (vop_t *)msdosfs_rmdir }, /* rmdir */ 2026 { &vop_symlink_desc, (vop_t *)msdosfs_symlink }, /* symlink */ 2027 { &vop_readdir_desc, (vop_t *)msdosfs_readdir }, /* readdir */ 2028 { &vop_readlink_desc, (vop_t *)msdosfs_readlink }, /* readlink */ 2029 { &vop_abortop_desc, (vop_t *)msdosfs_abortop }, /* abortop */ 2030 { &vop_inactive_desc, (vop_t *)msdosfs_inactive }, /* inactive */ 2031 { &vop_reclaim_desc, (vop_t *)msdosfs_reclaim }, /* reclaim */ 2032 { &vop_lock_desc, (vop_t *)msdosfs_lock }, /* lock */ 2033 { &vop_unlock_desc, (vop_t *)msdosfs_unlock }, /* unlock */ 2034 { &vop_bmap_desc, (vop_t *)msdosfs_bmap }, /* bmap */ 2035 { &vop_strategy_desc, (vop_t *)msdosfs_strategy }, /* strategy */ 2036 { &vop_print_desc, (vop_t *)msdosfs_print }, /* print */ 2037 { &vop_islocked_desc, (vop_t *)msdosfs_islocked }, /* islocked */ 2038 { &vop_pathconf_desc, (vop_t *)msdosfs_pathconf }, /* pathconf */ 2039 { &vop_advlock_desc, (vop_t *)msdosfs_advlock }, /* advlock */ 2040 { &vop_reallocblks_desc, (vop_t *)msdosfs_reallocblks }, /* reallocblks */ 2041 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 2042 { NULL, NULL } 2043 }; 2044 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 2045 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 2046 2047 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 2048