1 /* $Id: msdosfs_vnops.c,v 1.39 1997/02/22 09:40:48 peter 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/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/mount.h> 60 #include <sys/unistd.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 #include <vm/vm_param.h> 69 #include <vm/vm_extern.h> 70 71 #include <msdosfs/bpb.h> 72 #include <msdosfs/direntry.h> 73 #include <msdosfs/denode.h> 74 #include <msdosfs/msdosfsmount.h> 75 #include <msdosfs/fat.h> 76 77 /* 78 * Prototypes for MSDOSFS vnode operations 79 */ 80 static int msdosfs_create __P((struct vop_create_args *)); 81 static int msdosfs_mknod __P((struct vop_mknod_args *)); 82 static int msdosfs_open __P((struct vop_open_args *)); 83 static int msdosfs_close __P((struct vop_close_args *)); 84 static int msdosfs_access __P((struct vop_access_args *)); 85 static int msdosfs_getattr __P((struct vop_getattr_args *)); 86 static int msdosfs_setattr __P((struct vop_setattr_args *)); 87 static int msdosfs_read __P((struct vop_read_args *)); 88 static int msdosfs_write __P((struct vop_write_args *)); 89 static int msdosfs_ioctl __P((struct vop_ioctl_args *)); 90 static int msdosfs_select __P((struct vop_select_args *)); 91 static int msdosfs_mmap __P((struct vop_mmap_args *)); 92 static int msdosfs_fsync __P((struct vop_fsync_args *)); 93 static int msdosfs_seek __P((struct vop_seek_args *)); 94 static int msdosfs_remove __P((struct vop_remove_args *)); 95 static int msdosfs_link __P((struct vop_link_args *)); 96 static int msdosfs_rename __P((struct vop_rename_args *)); 97 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 98 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 99 static int msdosfs_symlink __P((struct vop_symlink_args *)); 100 static int msdosfs_readdir __P((struct vop_readdir_args *)); 101 static int msdosfs_readlink __P((struct vop_readlink_args *)); 102 static int msdosfs_abortop __P((struct vop_abortop_args *)); 103 static int msdosfs_lock __P((struct vop_lock_args *)); 104 static int msdosfs_unlock __P((struct vop_unlock_args *)); 105 static int msdosfs_bmap __P((struct vop_bmap_args *)); 106 static int msdosfs_strategy __P((struct vop_strategy_args *)); 107 static int msdosfs_print __P((struct vop_print_args *)); 108 static int msdosfs_islocked __P((struct vop_islocked_args *)); 109 static int msdosfs_advlock __P((struct vop_advlock_args *)); 110 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 111 static int msdosfs_reallocblks __P((struct vop_reallocblks_args *)); 112 113 /* 114 * Some general notes: 115 * 116 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 117 * read/written using the vnode for the filesystem. Blocks that represent 118 * the contents of a file are read/written using the vnode for the file 119 * (including directories when they are read/written as files). This 120 * presents problems for the dos filesystem because data that should be in 121 * an inode (if dos had them) resides in the directory itself. Since we 122 * must update directory entries without the benefit of having the vnode 123 * for the directory we must use the vnode for the filesystem. This means 124 * that when a directory is actually read/written (via read, write, or 125 * readdir, or seek) we must use the vnode for the filesystem instead of 126 * the vnode for the directory as would happen in ufs. This is to insure we 127 * retreive the correct block from the buffer cache since the hash value is 128 * based upon the vnode address and the desired block number. 129 */ 130 131 /* 132 * Create a regular file. On entry the directory to contain the file being 133 * created is locked. We must release before we return. We must also free 134 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 135 * only if the SAVESTART bit in cn_flags is clear on success. 136 */ 137 static int 138 msdosfs_create(ap) 139 struct vop_create_args /* { 140 struct vnode *a_dvp; 141 struct vnode **a_vpp; 142 struct componentname *a_cnp; 143 struct vattr *a_vap; 144 } */ *ap; 145 { 146 struct componentname *cnp = ap->a_cnp; 147 struct denode ndirent; 148 struct denode *dep; 149 struct denode *pdep = VTODE(ap->a_dvp); 150 struct timespec ts; 151 int error; 152 153 #ifdef MSDOSFS_DEBUG 154 printf("msdosfs_create(cnp %08x, vap %08x\n", cnp, ap->a_vap); 155 #endif 156 157 /* 158 * Create a directory entry for the file, then call createde() to 159 * have it installed. NOTE: DOS files are always executable. We 160 * use the absence of the owner write bit to make the file 161 * readonly. 162 */ 163 #ifdef DIAGNOSTIC 164 if ((cnp->cn_flags & SAVENAME) == 0) 165 panic("msdosfs_create: no name"); 166 #endif 167 bzero(&ndirent, sizeof(ndirent)); 168 TIMEVAL_TO_TIMESPEC(&time, &ts); 169 unix2dostime(&ts, &ndirent.de_Date, &ndirent.de_Time); 170 unix2dosfn((u_char *)cnp->cn_nameptr, ndirent.de_Name, cnp->cn_namelen); 171 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) 172 ? ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 173 ndirent.de_StartCluster = 0; 174 ndirent.de_FileSize = 0; 175 ndirent.de_dev = pdep->de_dev; 176 ndirent.de_devvp = pdep->de_devvp; 177 if ((error = createde(&ndirent, pdep, &dep)) == 0) { 178 *ap->a_vpp = DETOV(dep); 179 if ((cnp->cn_flags & SAVESTART) == 0) 180 free(cnp->cn_pnbuf, M_NAMEI); 181 } else { 182 free(cnp->cn_pnbuf, M_NAMEI); 183 } 184 vput(ap->a_dvp); /* release parent dir */ 185 return error; 186 } 187 188 static int 189 msdosfs_mknod(ap) 190 struct vop_mknod_args /* { 191 struct vnode *a_dvp; 192 struct vnode **a_vpp; 193 struct componentname *a_cnp; 194 struct vattr *a_vap; 195 } */ *ap; 196 { 197 int error; 198 199 switch (ap->a_vap->va_type) { 200 case VDIR: 201 error = msdosfs_mkdir((struct vop_mkdir_args *)ap); 202 break; 203 204 case VREG: 205 error = msdosfs_create((struct vop_create_args *)ap); 206 break; 207 208 default: 209 error = EINVAL; 210 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 211 vput(ap->a_dvp); 212 break; 213 } 214 return error; 215 } 216 217 static int 218 msdosfs_open(ap) 219 struct vop_open_args /* { 220 struct vnode *a_vp; 221 int a_mode; 222 struct ucred *a_cred; 223 struct proc *a_p; 224 } */ *ap; 225 { 226 return 0; 227 } 228 229 static int 230 msdosfs_close(ap) 231 struct vop_close_args /* { 232 struct vnode *a_vp; 233 int a_fflag; 234 struct ucred *a_cred; 235 struct proc *a_p; 236 } */ *ap; 237 { 238 struct vnode *vp = ap->a_vp; 239 struct denode *dep = VTODE(vp); 240 241 simple_lock(&vp->v_interlock); 242 if (vp->v_usecount > 1) 243 DE_TIMES(dep, &time); 244 simple_unlock(&vp->v_interlock); 245 return 0; 246 } 247 248 static int 249 msdosfs_access(ap) 250 struct vop_access_args /* { 251 struct vnode *a_vp; 252 int a_mode; 253 struct ucred *a_cred; 254 struct proc *a_p; 255 } */ *ap; 256 { 257 struct vnode *vp = ap->a_vp; 258 struct denode *dep = VTODE(ap->a_vp); 259 struct msdosfsmount *pmp = dep->de_pmp; 260 struct ucred *cred = ap->a_cred; 261 mode_t mask, file_mode, mode = ap->a_mode; 262 register gid_t *gp; 263 int i; 264 265 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 266 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 267 file_mode &= pmp->pm_mask; 268 269 /* 270 * Disallow write attempts on read-only file systems; 271 * unless the file is a socket, fifo, or a block or 272 * character device resident on the file system. 273 */ 274 if (mode & VWRITE) { 275 switch (vp->v_type) { 276 case VDIR: 277 case VLNK: 278 case VREG: 279 if (vp->v_mount->mnt_flag & MNT_RDONLY) 280 return (EROFS); 281 break; 282 } 283 } 284 285 /* User id 0 always gets access. */ 286 if (cred->cr_uid == 0) 287 return 0; 288 289 mask = 0; 290 291 /* Otherwise, check the owner. */ 292 if (cred->cr_uid == pmp->pm_uid) { 293 if (mode & VEXEC) 294 mask |= S_IXUSR; 295 if (mode & VREAD) 296 mask |= S_IRUSR; 297 if (mode & VWRITE) 298 mask |= S_IWUSR; 299 return (file_mode & mask) == mask ? 0 : EACCES; 300 } 301 302 /* Otherwise, check the groups. */ 303 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 304 if (pmp->pm_gid == *gp) { 305 if (mode & VEXEC) 306 mask |= S_IXGRP; 307 if (mode & VREAD) 308 mask |= S_IRGRP; 309 if (mode & VWRITE) 310 mask |= S_IWGRP; 311 return (file_mode & mask) == mask ? 0 : EACCES; 312 } 313 314 /* Otherwise, check everyone else. */ 315 if (mode & VEXEC) 316 mask |= S_IXOTH; 317 if (mode & VREAD) 318 mask |= S_IROTH; 319 if (mode & VWRITE) 320 mask |= S_IWOTH; 321 return (file_mode & mask) == mask ? 0 : EACCES; 322 } 323 324 static int 325 msdosfs_getattr(ap) 326 struct vop_getattr_args /* { 327 struct vnode *a_vp; 328 struct vattr *a_vap; 329 struct ucred *a_cred; 330 struct proc *a_p; 331 } */ *ap; 332 { 333 u_int cn; 334 struct denode *dep = VTODE(ap->a_vp); 335 struct vattr *vap = ap->a_vap; 336 337 DE_TIMES(dep, &time); 338 vap->va_fsid = dep->de_dev; 339 /* 340 * The following computation of the fileid must be the same as that 341 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 342 * doesn't work. 343 */ 344 if (dep->de_Attributes & ATTR_DIRECTORY) { 345 if ((cn = dep->de_StartCluster) == MSDOSFSROOT) 346 cn = 1; 347 } else { 348 if ((cn = dep->de_dirclust) == MSDOSFSROOT) 349 cn = 1; 350 cn = (cn << 16) | (dep->de_diroffset & 0xffff); 351 } 352 vap->va_fileid = cn; 353 vap->va_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 354 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 355 vap->va_mode &= dep->de_pmp->pm_mask; 356 if (dep->de_Attributes & ATTR_DIRECTORY) 357 vap->va_mode |= S_IFDIR; 358 vap->va_nlink = 1; 359 vap->va_gid = dep->de_pmp->pm_gid; 360 vap->va_uid = dep->de_pmp->pm_uid; 361 vap->va_rdev = 0; 362 vap->va_size = dep->de_FileSize; 363 dos2unixtime(dep->de_Date, dep->de_Time, &vap->va_atime); 364 vap->va_mtime = vap->va_atime; 365 #if 0 366 #ifndef MSDOSFS_NODIRMOD 367 if (vap->va_mode & S_IFDIR) 368 TIMEVAL_TO_TIMESPEC(&time, &vap->va_mtime); 369 #endif 370 #endif 371 vap->va_ctime = vap->va_atime; 372 vap->va_flags = (dep->de_Attributes & ATTR_ARCHIVE) ? 0 : SF_ARCHIVED; 373 vap->va_gen = 0; 374 vap->va_blocksize = dep->de_pmp->pm_bpcluster; 375 vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) & 376 ~(dep->de_pmp->pm_crbomask); 377 vap->va_type = ap->a_vp->v_type; 378 vap->va_filerev = dep->de_modrev; 379 return 0; 380 } 381 382 static int 383 msdosfs_setattr(ap) 384 struct vop_setattr_args /* { 385 struct vnode *a_vp; 386 struct vattr *a_vap; 387 struct ucred *a_cred; 388 struct proc *a_p; 389 } */ *ap; 390 { 391 struct vnode *vp = ap->a_vp; 392 struct denode *dep = VTODE(ap->a_vp); 393 struct vattr *vap = ap->a_vap; 394 struct ucred *cred = ap->a_cred; 395 int error = 0; 396 397 /* 398 * Check for unsettable attributes. 399 */ 400 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 401 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 402 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 403 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 404 return (EINVAL); 405 } 406 if (vap->va_flags != VNOVAL) { 407 if (vp->v_mount->mnt_flag & MNT_RDONLY) 408 return (EROFS); 409 if (cred->cr_uid != dep->de_pmp->pm_uid && 410 (error = suser(cred, &ap->a_p->p_acflag))) 411 return (error); 412 /* 413 * We are very inconsistent about handling unsupported 414 * attributes. We ignored the the access time and the 415 * read and execute bits. We were strict for the other 416 * attributes. 417 * 418 * Here we are strict, stricter than ufs in not allowing 419 * users to attempt to set SF_SETTABLE bits or anyone to 420 * set unsupported bits. However, we ignore attempts to 421 * set ATTR_ARCHIVE for directories `cp -pr' from a more 422 * sensible file system attempts it a lot. 423 */ 424 if (cred->cr_uid != 0) { 425 if (vap->va_flags & SF_SETTABLE) 426 return EPERM; 427 } 428 if (vap->va_flags & ~SF_ARCHIVED) 429 return EINVAL; 430 if (vap->va_flags & SF_ARCHIVED) 431 dep->de_Attributes &= ~ATTR_ARCHIVE; 432 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 433 dep->de_Attributes |= ATTR_ARCHIVE; 434 dep->de_flag |= DE_MODIFIED; 435 } 436 437 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 438 if (vp->v_mount->mnt_flag & MNT_RDONLY) 439 return (EROFS); 440 if ((cred->cr_uid != dep->de_pmp->pm_uid || 441 vap->va_uid != dep->de_pmp->pm_uid || 442 (vap->va_gid != dep->de_pmp->pm_gid && 443 !groupmember(vap->va_gid, cred))) && 444 (error = suser(cred, &ap->a_p->p_acflag))) 445 return error; 446 if (vap->va_uid != dep->de_pmp->pm_uid || 447 vap->va_gid != dep->de_pmp->pm_gid) 448 return EINVAL; 449 } 450 if (vap->va_size != VNOVAL) { 451 /* 452 * Disallow write attempts on read-only file systems; 453 * unless the file is a socket, fifo, or a block or 454 * character device resident on the file system. 455 */ 456 switch (vp->v_type) { 457 case VDIR: 458 return (EISDIR); 459 case VLNK: 460 case VREG: 461 if (vp->v_mount->mnt_flag & MNT_RDONLY) 462 return (EROFS); 463 break; 464 } 465 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 466 if (error) 467 return error; 468 } 469 if (vap->va_mtime.tv_sec != VNOVAL) { 470 if (vp->v_mount->mnt_flag & MNT_RDONLY) 471 return (EROFS); 472 if (cred->cr_uid != dep->de_pmp->pm_uid && 473 (error = suser(cred, &ap->a_p->p_acflag)) && 474 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 475 (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_p)))) 476 return error; 477 dep->de_flag |= DE_UPDATE; 478 error = deupdat(dep, &vap->va_mtime, 1); 479 if (error) 480 return error; 481 } 482 483 /* 484 * DOS files only have the ability to have their writability 485 * attribute set, so we use the owner write bit to set the readonly 486 * attribute. 487 */ 488 error = 0; 489 if (vap->va_mode != (u_short) VNOVAL) { 490 if (vp->v_mount->mnt_flag & MNT_RDONLY) 491 return (EROFS); 492 if (cred->cr_uid != dep->de_pmp->pm_uid && 493 (error = suser(cred, &ap->a_p->p_acflag))) 494 return error; 495 496 /* We ignore the read and execute bits */ 497 if (vap->va_mode & VWRITE) 498 dep->de_Attributes &= ~ATTR_READONLY; 499 else 500 dep->de_Attributes |= ATTR_READONLY; 501 dep->de_flag |= DE_MODIFIED; 502 } 503 return error; 504 } 505 506 static int 507 msdosfs_read(ap) 508 struct vop_read_args /* { 509 struct vnode *a_vp; 510 struct uio *a_uio; 511 int a_ioflag; 512 struct ucred *a_cred; 513 } */ *ap; 514 { 515 int error = 0; 516 int diff; 517 int isadir; 518 long n; 519 long on; 520 daddr_t lbn; 521 daddr_t rablock; 522 int rasize; 523 struct buf *bp; 524 struct vnode *vp = ap->a_vp; 525 struct denode *dep = VTODE(vp); 526 struct msdosfsmount *pmp = dep->de_pmp; 527 struct uio *uio = ap->a_uio; 528 529 /* 530 * If they didn't ask for any data, then we are done. 531 */ 532 if (uio->uio_resid == 0) 533 return 0; 534 if (uio->uio_offset < 0) 535 return EINVAL; 536 537 isadir = dep->de_Attributes & ATTR_DIRECTORY; 538 do { 539 lbn = uio->uio_offset >> pmp->pm_cnshift; 540 on = uio->uio_offset & pmp->pm_crbomask; 541 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 542 diff = dep->de_FileSize - uio->uio_offset; 543 if (diff <= 0) 544 return 0; 545 /* convert cluster # to block # if a directory */ 546 if (isadir) { 547 error = pcbmap(dep, lbn, &lbn, 0); 548 if (error) 549 return error; 550 } 551 if (diff < n) 552 n = diff; 553 /* 554 * If we are operating on a directory file then be sure to 555 * do i/o with the vnode for the filesystem instead of the 556 * vnode for the directory. 557 */ 558 if (isadir) { 559 error = bread(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 560 NOCRED, &bp); 561 } else { 562 rablock = lbn + 1; 563 #ifdef PC98 564 /* 565 * 1024byte/sector support 566 */ 567 if (pmp->pm_BytesPerSec == 1024) 568 vp->v_flag |= 0x10000; 569 #endif 570 if (vp->v_lastr + 1 == lbn && 571 rablock * pmp->pm_bpcluster < dep->de_FileSize) { 572 rasize = pmp->pm_bpcluster; 573 error = breadn(vp, lbn, pmp->pm_bpcluster, 574 &rablock, &rasize, 1, 575 NOCRED, &bp); 576 } else { 577 error = bread(vp, lbn, pmp->pm_bpcluster, NOCRED, 578 &bp); 579 } 580 vp->v_lastr = lbn; 581 } 582 n = min(n, pmp->pm_bpcluster - bp->b_resid); 583 if (error) { 584 brelse(bp); 585 return error; 586 } 587 error = uiomove(bp->b_data + on, (int) n, uio); 588 /* 589 * If we have read everything from this block or have read 590 * to end of file then we are done with this block. Mark 591 * it to say the buffer can be reused if need be. 592 */ 593 #if 0 594 if (n + on == pmp->pm_bpcluster || 595 uio->uio_offset == dep->de_FileSize) 596 bp->b_flags |= B_AGE; 597 #endif 598 brelse(bp); 599 } while (error == 0 && uio->uio_resid > 0 && n != 0); 600 return error; 601 } 602 603 /* 604 * Write data to a file or directory. 605 */ 606 static int 607 msdosfs_write(ap) 608 struct vop_write_args /* { 609 struct vnode *a_vp; 610 struct uio *a_uio; 611 int a_ioflag; 612 struct ucred *a_cred; 613 } */ *ap; 614 { 615 int n; 616 int isadir; 617 int croffset; 618 int resid; 619 int osize; 620 int error = 0; 621 u_long count; 622 daddr_t bn, lastcn; 623 struct buf *bp; 624 int ioflag = ap->a_ioflag; 625 struct uio *uio = ap->a_uio; 626 struct proc *p = uio->uio_procp; 627 struct vnode *vp = ap->a_vp; 628 struct vnode *thisvp; 629 struct denode *dep = VTODE(vp); 630 struct msdosfsmount *pmp = dep->de_pmp; 631 struct ucred *cred = ap->a_cred; 632 struct timespec ts; 633 634 #ifdef MSDOSFS_DEBUG 635 printf("msdosfs_write(vp %08x, uio %08x, ioflag %08x, cred %08x\n", 636 vp, uio, ioflag, cred); 637 printf("msdosfs_write(): diroff %d, dirclust %d, startcluster %d\n", 638 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 639 #endif 640 641 switch (vp->v_type) { 642 case VREG: 643 if (ioflag & IO_APPEND) 644 uio->uio_offset = dep->de_FileSize; 645 isadir = 0; 646 thisvp = vp; 647 break; 648 649 case VDIR: 650 if ((ioflag & IO_SYNC) == 0) 651 panic("msdosfs_write(): non-sync directory update"); 652 isadir = 1; 653 thisvp = pmp->pm_devvp; 654 break; 655 656 default: 657 panic("msdosfs_write(): bad file type"); 658 break; 659 } 660 661 if (uio->uio_offset < 0) 662 return EINVAL; 663 664 if (uio->uio_resid == 0) 665 return 0; 666 667 /* 668 * If they've exceeded their filesize limit, tell them about it. 669 */ 670 if (vp->v_type == VREG && p && 671 ((uio->uio_offset + uio->uio_resid) > 672 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 673 psignal(p, SIGXFSZ); 674 return EFBIG; 675 } 676 677 /* 678 * If attempting to write beyond the end of the root directory we 679 * stop that here because the root directory can not grow. 680 */ 681 if ((dep->de_Attributes & ATTR_DIRECTORY) && 682 dep->de_StartCluster == MSDOSFSROOT && 683 (uio->uio_offset + uio->uio_resid) > dep->de_FileSize) 684 return ENOSPC; 685 686 /* 687 * If the offset we are starting the write at is beyond the end of 688 * the file, then they've done a seek. Unix filesystems allow 689 * files with holes in them, DOS doesn't so we must fill the hole 690 * with zeroed blocks. 691 */ 692 if (uio->uio_offset > dep->de_FileSize) { 693 error = deextend(dep, uio->uio_offset, cred); 694 if (error) 695 return error; 696 } 697 698 /* 699 * Remember some values in case the write fails. 700 */ 701 resid = uio->uio_resid; 702 osize = dep->de_FileSize; 703 704 705 #ifdef PC98 706 /* 707 * 1024byte/sector support 708 */ 709 if (pmp->pm_BytesPerSec == 1024) 710 thisvp->v_flag |= 0x10000; 711 #endif 712 /* 713 * If we write beyond the end of the file, extend it to its ultimate 714 * size ahead of the time to hopefully get a contiguous area. 715 */ 716 if (uio->uio_offset + resid > osize) { 717 count = de_clcount(pmp, uio->uio_offset + resid) - de_clcount(pmp, osize); 718 if ((error = extendfile(dep, count, NULL, NULL, 0)) 719 && (error != ENOSPC || (ioflag & IO_UNIT))) 720 goto errexit; 721 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 722 } else 723 lastcn = de_clcount(pmp, osize) - 1; 724 725 do { 726 bn = de_blk(pmp, uio->uio_offset); 727 if (isadir) { 728 error = pcbmap(dep, bn, &bn, 0); 729 if (error) 730 break; 731 } else if (bn > lastcn) { 732 error = ENOSPC; 733 break; 734 } 735 736 croffset = uio->uio_offset & pmp->pm_crbomask; 737 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 738 if (uio->uio_offset + n > dep->de_FileSize) { 739 dep->de_FileSize = uio->uio_offset + n; 740 /* The object size needs to be set before buffer is allocated */ 741 vnode_pager_setsize(vp, dep->de_FileSize); 742 } 743 744 if ((uio->uio_offset & pmp->pm_crbomask) == 0 745 && (de_blk(pmp, uio->uio_offset + uio->uio_resid) > de_blk(pmp, uio->uio_offset) 746 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 747 /* 748 * If either the whole cluster gets written, 749 * or we write the cluster from its start beyond EOF, 750 * then no need to read data from disk. 751 */ 752 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 753 clrbuf(bp); 754 /* 755 * Do the bmap now, since pcbmap needs buffers 756 * for the fat table. (see msdosfs_strategy) 757 */ 758 if (!isadir) { 759 if (bp->b_blkno == bp->b_lblkno) { 760 error = pcbmap(dep, bp->b_lblkno, 761 &bp->b_blkno, 0); 762 if (error) 763 bp->b_blkno = -1; 764 } 765 if (bp->b_blkno == -1) { 766 brelse(bp); 767 if (!error) 768 error = EIO; /* XXX */ 769 break; 770 } 771 } 772 } else { 773 /* 774 * The block we need to write into exists, so read it in. 775 */ 776 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 777 if (error) 778 break; 779 } 780 781 /* 782 * Should these vnode_pager_* functions be done on dir 783 * files? 784 */ 785 786 /* 787 * Copy the data from user space into the buf header. 788 */ 789 error = uiomove(bp->b_data + croffset, n, uio); 790 791 /* 792 * If they want this synchronous then write it and wait for 793 * it. Otherwise, if on a cluster boundary write it 794 * asynchronously so we can move on to the next block 795 * without delay. Otherwise do a delayed write because we 796 * may want to write somemore into the block later. 797 */ 798 if (ioflag & IO_SYNC) 799 (void) bwrite(bp); 800 else if (n + croffset == pmp->pm_bpcluster) { 801 bawrite(bp); 802 } else 803 bdwrite(bp); 804 dep->de_flag |= DE_UPDATE; 805 } while (error == 0 && uio->uio_resid > 0); 806 807 /* 808 * If the write failed and they want us to, truncate the file back 809 * to the size it was before the write was attempted. 810 */ 811 errexit: 812 if (error) { 813 if (ioflag & IO_UNIT) { 814 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 815 uio->uio_offset -= resid - uio->uio_resid; 816 uio->uio_resid = resid; 817 } else { 818 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 819 if (uio->uio_resid != resid) 820 error = 0; 821 } 822 } else if (ioflag & IO_SYNC) { 823 TIMEVAL_TO_TIMESPEC(&time, &ts); 824 error = deupdat(dep, &ts, 1); 825 } 826 return error; 827 } 828 829 static int 830 msdosfs_ioctl(ap) 831 struct vop_ioctl_args /* { 832 struct vnode *a_vp; 833 int a_command; 834 caddr_t a_data; 835 int a_fflag; 836 struct ucred *a_cred; 837 struct proc *a_p; 838 } */ *ap; 839 { 840 return ENOTTY; 841 } 842 843 static int 844 msdosfs_select(ap) 845 struct vop_select_args /* { 846 struct vnode *a_vp; 847 int a_which; 848 int a_fflags; 849 struct ucred *a_cred; 850 struct proc *a_p; 851 } */ *ap; 852 { 853 return 1; /* DOS filesystems never block? */ 854 } 855 856 static int 857 msdosfs_mmap(ap) 858 struct vop_mmap_args /* { 859 struct vnode *a_vp; 860 int a_fflags; 861 struct ucred *a_cred; 862 struct proc *a_p; 863 } */ *ap; 864 { 865 return EINVAL; 866 } 867 868 /* 869 * Flush the blocks of a file to disk. 870 * 871 * This function is worthless for vnodes that represent directories. Maybe we 872 * could just do a sync if they try an fsync on a directory file. 873 */ 874 static int 875 msdosfs_fsync(ap) 876 struct vop_fsync_args /* { 877 struct vnode *a_vp; 878 struct ucred *a_cred; 879 int a_waitfor; 880 struct proc *a_p; 881 } */ *ap; 882 { 883 register struct vnode *vp = ap->a_vp; 884 register struct buf *bp; 885 int wait = ap->a_waitfor == MNT_WAIT; 886 struct timespec ts; 887 struct buf *nbp; 888 int s; 889 890 /* 891 * Flush all dirty buffers associated with a vnode. 892 */ 893 loop: 894 s = splbio(); 895 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 896 nbp = bp->b_vnbufs.le_next; 897 if ((bp->b_flags & B_BUSY)) 898 continue; 899 if ((bp->b_flags & B_DELWRI) == 0) 900 panic("msdosfs_fsync: not dirty"); 901 bremfree(bp); 902 bp->b_flags |= B_BUSY; 903 splx(s); 904 (void) bwrite(bp); 905 goto loop; 906 } 907 while (vp->v_numoutput) { 908 vp->v_flag |= VBWAIT; 909 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 910 } 911 #ifdef DIAGNOSTIC 912 if (vp->v_dirtyblkhd.lh_first) { 913 vprint("msdosfs_fsync: dirty", vp); 914 goto loop; 915 } 916 #endif 917 splx(s); 918 TIMEVAL_TO_TIMESPEC(&time, &ts); 919 return deupdat(VTODE(vp), &ts, wait); 920 } 921 922 /* 923 * Now the whole work of extending a file is done in the write function. 924 * So nothing to do here. 925 */ 926 static int 927 msdosfs_seek(ap) 928 struct vop_seek_args /* { 929 struct vnode *a_vp; 930 off_t a_oldoff; 931 off_t a_newoff; 932 struct ucred *a_cred; 933 } */ *ap; 934 { 935 return 0; 936 } 937 938 static int 939 msdosfs_remove(ap) 940 struct vop_remove_args /* { 941 struct vnode *a_dvp; 942 struct vnode *a_vp; 943 struct componentname *a_cnp; 944 } */ *ap; 945 { 946 int error; 947 struct denode *dep = VTODE(ap->a_vp); 948 struct denode *ddep = VTODE(ap->a_dvp); 949 950 error = removede(ddep,dep); 951 #ifdef MSDOSFS_DEBUG 952 printf("msdosfs_remove(), dep %08x, v_usecount %d\n", dep, ap->a_vp->v_usecount); 953 #endif 954 if (ddep == dep) 955 vrele(ap->a_vp); 956 else 957 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 958 * via vrele() */ 959 vput(ap->a_dvp); 960 return error; 961 } 962 963 /* 964 * DOS filesystems don't know what links are. But since we already called 965 * msdosfs_lookup() with create and lockparent, the parent is locked so we 966 * have to free it before we return the error. 967 */ 968 static int 969 msdosfs_link(ap) 970 struct vop_link_args /* { 971 struct vnode *a_tdvp; 972 struct vnode *a_vp; 973 struct componentname *a_cnp; 974 } */ *ap; 975 { 976 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 977 vput(ap->a_tdvp); 978 return EOPNOTSUPP; 979 } 980 981 /* 982 * Renames on files require moving the denode to a new hash queue since the 983 * denode's location is used to compute which hash queue to put the file 984 * in. Unless it is a rename in place. For example "mv a b". 985 * 986 * What follows is the basic algorithm: 987 * 988 * if (file move) { 989 * if (dest file exists) { 990 * remove dest file 991 * } 992 * if (dest and src in same directory) { 993 * rewrite name in existing directory slot 994 * } else { 995 * write new entry in dest directory 996 * update offset and dirclust in denode 997 * move denode to new hash chain 998 * clear old directory entry 999 * } 1000 * } else { 1001 * directory move 1002 * if (dest directory exists) { 1003 * if (dest is not empty) { 1004 * return ENOTEMPTY 1005 * } 1006 * remove dest directory 1007 * } 1008 * if (dest and src in same directory) { 1009 * rewrite name in existing entry 1010 * } else { 1011 * be sure dest is not a child of src directory 1012 * write entry in dest directory 1013 * update "." and ".." in moved directory 1014 * clear old directory entry for moved directory 1015 * } 1016 * } 1017 * 1018 * On entry: 1019 * source's parent directory is unlocked 1020 * source file or directory is unlocked 1021 * destination's parent directory is locked 1022 * destination file or directory is locked if it exists 1023 * 1024 * On exit: 1025 * all denodes should be released 1026 * 1027 * Notes: 1028 * I'm not sure how the memory containing the pathnames pointed at by the 1029 * componentname structures is freed, there may be some memory bleeding 1030 * for each rename done. 1031 */ 1032 static int 1033 msdosfs_rename(ap) 1034 struct vop_rename_args /* { 1035 struct vnode *a_fdvp; 1036 struct vnode *a_fvp; 1037 struct componentname *a_fcnp; 1038 struct vnode *a_tdvp; 1039 struct vnode *a_tvp; 1040 struct componentname *a_tcnp; 1041 } */ *ap; 1042 { 1043 u_char toname[11]; 1044 int error; 1045 int newparent = 0; 1046 int sourceisadirectory = 0; 1047 u_long cn; 1048 daddr_t bn; 1049 struct vnode *tvp = ap->a_tvp; 1050 struct componentname *fcnp = ap->a_fcnp; 1051 struct proc *p = fcnp->cn_proc; 1052 struct denode *fddep; /* from file's parent directory */ 1053 struct denode *fdep; /* from file or directory */ 1054 struct denode *tddep; /* to file's parent directory */ 1055 struct denode *tdep; /* to file or directory */ 1056 struct msdosfsmount *pmp; 1057 struct direntry *dotdotp; 1058 struct direntry *ep; 1059 struct buf *bp; 1060 1061 fddep = VTODE(ap->a_fdvp); 1062 fdep = VTODE(ap->a_fvp); 1063 tddep = VTODE(ap->a_tdvp); 1064 tdep = tvp ? VTODE(tvp) : NULL; 1065 pmp = fddep->de_pmp; 1066 1067 /* Check for cross-device rename */ 1068 if ((ap->a_fvp->v_mount != ap->a_tdvp->v_mount) || 1069 (tvp && (ap->a_fvp->v_mount != tvp->v_mount))) { 1070 error = EXDEV; 1071 goto bad; 1072 } 1073 1074 /* 1075 * Convert the filename in tcnp into a dos filename. We copy this 1076 * into the denode and directory entry for the destination 1077 * file/directory. 1078 */ 1079 unix2dosfn((u_char *) ap->a_tcnp->cn_nameptr, 1080 toname, ap->a_tcnp->cn_namelen); 1081 1082 /* 1083 * At this point this is the lock state of the denodes: 1084 * fddep referenced 1085 * fdep referenced 1086 * tddep locked 1087 * tdep locked if it exists 1088 */ 1089 1090 /* 1091 * Be sure we are not renaming ".", "..", or an alias of ".". This 1092 * leads to a crippled directory tree. It's pretty tough to do a 1093 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1094 * doesn't work if the ".." entry is missing. 1095 */ 1096 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1097 if ((ap->a_fcnp->cn_namelen == 1 1098 && ap->a_fcnp->cn_nameptr[0] == '.') 1099 || fddep == fdep 1100 || (ap->a_fcnp->cn_flags | ap->a_tcnp->cn_flags) 1101 & ISDOTDOT) { 1102 VOP_ABORTOP(ap->a_tdvp, ap->a_tcnp); 1103 vput(ap->a_tdvp); 1104 if (tvp) 1105 vput(tvp); 1106 VOP_ABORTOP(ap->a_fdvp, ap->a_fcnp); 1107 vrele(ap->a_fdvp); 1108 vrele(ap->a_fvp); 1109 return EINVAL; 1110 } 1111 sourceisadirectory = 1; 1112 } 1113 1114 /* 1115 * If we are renaming a directory, and the directory is being moved 1116 * to another directory, then we must be sure the destination 1117 * directory is not in the subtree of the source directory. This 1118 * could orphan everything under the source directory. 1119 * doscheckpath() unlocks the destination's parent directory so we 1120 * must look it up again to relock it. 1121 */ 1122 if (fddep->de_StartCluster != tddep->de_StartCluster) 1123 newparent = 1; 1124 if (sourceisadirectory && newparent) { 1125 if (tdep) { 1126 vput(ap->a_tvp); 1127 tdep = NULL; 1128 } 1129 /* doscheckpath() vput()'s tddep */ 1130 error = doscheckpath(fdep, tddep); 1131 tddep = NULL; 1132 if (error) 1133 goto bad; 1134 if ((ap->a_tcnp->cn_flags & SAVESTART) == 0) 1135 panic("msdosfs_rename(): lost to startdir"); 1136 error = relookup(ap->a_tdvp, &tvp, ap->a_tcnp); 1137 if (error) 1138 goto bad; 1139 tddep = VTODE(ap->a_tdvp); 1140 tdep = tvp ? VTODE(tvp) : NULL; 1141 } 1142 1143 /* 1144 * If the destination exists, then be sure its type (file or dir) 1145 * matches that of the source. And, if it is a directory make sure 1146 * it is empty. Then delete the destination. 1147 */ 1148 if (tdep) { 1149 if (tdep->de_Attributes & ATTR_DIRECTORY) { 1150 if (!sourceisadirectory) { 1151 error = ENOTDIR; 1152 goto bad; 1153 } 1154 if (!dosdirempty(tdep)) { 1155 error = ENOTEMPTY; 1156 goto bad; 1157 } 1158 cache_purge(DETOV(tddep)); 1159 } else { /* destination is file */ 1160 if (sourceisadirectory) { 1161 error = EISDIR; 1162 goto bad; 1163 } 1164 } 1165 error = removede(tddep,tdep); 1166 if (error) 1167 goto bad; 1168 vput(ap->a_tvp); 1169 tdep = NULL; 1170 } 1171 1172 /* 1173 * If the source and destination are in the same directory then 1174 * just read in the directory entry, change the name in the 1175 * directory entry and write it back to disk. 1176 */ 1177 if (newparent == 0) { 1178 /* tddep and fddep point to the same denode here */ 1179 vn_lock(ap->a_fvp, LK_EXCLUSIVE, p); /* ap->a_fdvp is already locked */ 1180 error = readep(fddep->de_pmp, fdep->de_dirclust, 1181 fdep->de_diroffset, &bp, &ep); 1182 if (error) { 1183 VOP_UNLOCK(ap->a_fvp, 0, p); 1184 goto bad; 1185 } 1186 bcopy(toname, ep->deName, 11); 1187 error = bwrite(bp); 1188 if (error) { 1189 VOP_UNLOCK(ap->a_fvp, 0, p); 1190 goto bad; 1191 } 1192 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1193 /* 1194 * fdep locked fddep and tddep point to the same denode 1195 * which is locked tdep is NULL 1196 */ 1197 } else { 1198 u_long dirsize = 0L; 1199 1200 /* 1201 * If the source and destination are in different 1202 * directories, then mark the entry in the source directory 1203 * as deleted and write a new entry in the destination 1204 * directory. Then move the denode to the correct hash 1205 * chain for its new location in the filesystem. And, if 1206 * we moved a directory, then update its .. entry to point 1207 * to the new parent directory. If we moved a directory 1208 * will also insure that the directory entry on disk has a 1209 * filesize of zero. 1210 */ 1211 vn_lock(ap->a_fvp, LK_EXCLUSIVE, p); 1212 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1213 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1214 dirsize = fdep->de_FileSize; 1215 fdep->de_FileSize = 0; 1216 } 1217 error = createde(fdep, tddep, (struct denode **) 0); 1218 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1219 fdep->de_FileSize = dirsize; 1220 } 1221 if (error) { 1222 /* should put back filename */ 1223 VOP_UNLOCK(ap->a_fvp, 0, p); 1224 goto bad; 1225 } 1226 vn_lock(ap->a_fdvp, LK_EXCLUSIVE, p); 1227 error = readep(fddep->de_pmp, fddep->de_fndclust, 1228 fddep->de_fndoffset, &bp, &ep); 1229 if (error) { 1230 VOP_UNLOCK(ap->a_fvp, 0, p); 1231 VOP_UNLOCK(ap->a_fdvp, 0, p); 1232 goto bad; 1233 } 1234 ep->deName[0] = SLOT_DELETED; 1235 error = bwrite(bp); 1236 if (error) { 1237 VOP_UNLOCK(ap->a_fvp, 0, p); 1238 VOP_UNLOCK(ap->a_fdvp, 0, p); 1239 goto bad; 1240 } 1241 if (!sourceisadirectory) { 1242 fdep->de_dirclust = tddep->de_fndclust; 1243 fdep->de_diroffset = tddep->de_fndoffset; 1244 reinsert(fdep); 1245 } 1246 VOP_UNLOCK(ap->a_fdvp, 0, p); 1247 } 1248 /* fdep is still locked here */ 1249 1250 /* 1251 * If we moved a directory to a new parent directory, then we must 1252 * fixup the ".." entry in the moved directory. 1253 */ 1254 if (sourceisadirectory && newparent) { 1255 cn = fdep->de_StartCluster; 1256 if (cn == MSDOSFSROOT) { 1257 /* this should never happen */ 1258 panic("msdosfs_rename(): updating .. in root directory?"); 1259 } else { 1260 bn = cntobn(pmp, cn); 1261 } 1262 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1263 NOCRED, &bp); 1264 if (error) { 1265 /* should really panic here, fs is corrupt */ 1266 VOP_UNLOCK(ap->a_fvp, 0, p); 1267 goto bad; 1268 } 1269 dotdotp = (struct direntry *) bp->b_data + 1; 1270 putushort(dotdotp->deStartCluster, tddep->de_StartCluster); 1271 error = bwrite(bp); 1272 VOP_UNLOCK(ap->a_fvp, 0, p); 1273 if (error) { 1274 /* should really panic here, fs is corrupt */ 1275 goto bad; 1276 } 1277 } else 1278 VOP_UNLOCK(ap->a_fvp, 0, p); 1279 bad: ; 1280 vrele(DETOV(fdep)); 1281 vrele(DETOV(fddep)); 1282 if (tdep) 1283 vput(DETOV(tdep)); 1284 if (tddep) 1285 vput(DETOV(tddep)); 1286 return error; 1287 } 1288 1289 static struct { 1290 struct direntry dot; 1291 struct direntry dotdot; 1292 } dosdirtemplate = { 1293 { 1294 ". ", " ", /* the . entry */ 1295 ATTR_DIRECTORY, /* file attribute */ 1296 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1297 {210, 4}, {210, 4}, /* time and date */ 1298 {0, 0}, /* startcluster */ 1299 {0, 0, 0, 0}, /* filesize */ 1300 },{ 1301 ".. ", " ", /* the .. entry */ 1302 ATTR_DIRECTORY, /* file attribute */ 1303 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1304 {210, 4}, {210, 4}, /* time and date */ 1305 {0, 0}, /* startcluster */ 1306 {0, 0, 0, 0}, /* filesize */ 1307 } 1308 }; 1309 1310 static int 1311 msdosfs_mkdir(ap) 1312 struct vop_mkdir_args /* { 1313 struct vnode *a_dvp; 1314 struvt vnode **a_vpp; 1315 struvt componentname *a_cnp; 1316 struct vattr *a_vap; 1317 } */ *ap; 1318 { 1319 int bn; 1320 int error; 1321 u_long newcluster; 1322 struct denode *pdep; 1323 struct denode *ndep; 1324 struct direntry *denp; 1325 struct denode ndirent; 1326 struct msdosfsmount *pmp; 1327 struct buf *bp; 1328 struct timespec ts; 1329 u_short dDate, dTime; 1330 1331 pdep = VTODE(ap->a_dvp); 1332 1333 /* 1334 * If this is the root directory and there is no space left we 1335 * can't do anything. This is because the root directory can not 1336 * change size. 1337 */ 1338 if (pdep->de_StartCluster == MSDOSFSROOT && pdep->de_fndclust == (u_long)-1) { 1339 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1340 vput(ap->a_dvp); 1341 return ENOSPC; 1342 } 1343 1344 pmp = pdep->de_pmp; 1345 1346 /* 1347 * Allocate a cluster to hold the about to be created directory. 1348 */ 1349 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1350 if (error) { 1351 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1352 vput(ap->a_dvp); 1353 return error; 1354 } 1355 1356 /* 1357 * Now fill the cluster with the "." and ".." entries. And write 1358 * the cluster to disk. This way it is there for the parent 1359 * directory to be pointing at if there were a crash. 1360 */ 1361 bn = cntobn(pmp, newcluster); 1362 /* always succeeds */ 1363 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1364 bzero(bp->b_data, pmp->pm_bpcluster); 1365 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1366 denp = (struct direntry *) bp->b_data; 1367 putushort(denp->deStartCluster, newcluster); 1368 TIMEVAL_TO_TIMESPEC(&time, &ts); 1369 unix2dostime(&ts, &dDate, &dTime); 1370 putushort(denp->deDate, dDate); 1371 putushort(denp->deTime, dTime); 1372 denp++; 1373 putushort(denp->deStartCluster, pdep->de_StartCluster); 1374 putushort(denp->deDate, dDate); 1375 putushort(denp->deTime, dTime); 1376 error = bwrite(bp); 1377 if (error) { 1378 clusterfree(pmp, newcluster, NULL); 1379 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1380 vput(ap->a_dvp); 1381 return error; 1382 } 1383 1384 /* 1385 * Now build up a directory entry pointing to the newly allocated 1386 * cluster. This will be written to an empty slot in the parent 1387 * directory. 1388 */ 1389 ndep = &ndirent; 1390 bzero(ndep, sizeof(*ndep)); 1391 unix2dosfn((u_char *)ap->a_cnp->cn_nameptr, 1392 ndep->de_Name, ap->a_cnp->cn_namelen); 1393 TIMEVAL_TO_TIMESPEC(&time, &ts); 1394 unix2dostime(&ts, &ndep->de_Date, &ndep->de_Time); 1395 ndep->de_StartCluster = newcluster; 1396 ndep->de_Attributes = ATTR_DIRECTORY; 1397 1398 error = createde(ndep, pdep, &ndep); 1399 if (error) { 1400 clusterfree(pmp, newcluster, NULL); 1401 } else { 1402 *ap->a_vpp = DETOV(ndep); 1403 } 1404 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1405 #ifdef MSDOSFS_DEBUG 1406 printf("msdosfs_mkdir(): vput(%08x)\n", ap->a_dvp); 1407 #endif 1408 vput(ap->a_dvp); 1409 return error; 1410 } 1411 1412 static int 1413 msdosfs_rmdir(ap) 1414 struct vop_rmdir_args /* { 1415 struct vnode *a_dvp; 1416 struct vnode *a_vp; 1417 struct componentname *a_cnp; 1418 } */ *ap; 1419 { 1420 struct denode *ddep; 1421 struct denode *dep; 1422 int error = 0; 1423 1424 ddep = VTODE(ap->a_dvp); /* parent dir of dir to delete */ 1425 dep = VTODE(ap->a_vp);/* directory to delete */ 1426 1427 /* 1428 * Don't let "rmdir ." go thru. 1429 */ 1430 if (ddep == dep) { 1431 vrele(ap->a_vp); 1432 vput(ap->a_vp); 1433 return EINVAL; 1434 } 1435 1436 /* 1437 * Be sure the directory being deleted is empty. 1438 */ 1439 if (dosdirempty(dep) == 0) { 1440 error = ENOTEMPTY; 1441 goto out; 1442 } 1443 1444 /* 1445 * Delete the entry from the directory. For dos filesystems this 1446 * gets rid of the directory entry on disk, the in memory copy 1447 * still exists but the de_refcnt is <= 0. This prevents it from 1448 * being found by deget(). When the vput() on dep is done we give 1449 * up access and eventually msdosfs_reclaim() will be called which 1450 * will remove it from the denode cache. 1451 */ 1452 error = removede(ddep,dep); 1453 if (error) 1454 goto out; 1455 1456 /* 1457 * This is where we decrement the link count in the parent 1458 * directory. Since dos filesystems don't do this we just purge 1459 * the name cache and let go of the parent directory denode. 1460 */ 1461 cache_purge(DETOV(ddep)); 1462 vput(ap->a_dvp); 1463 ap->a_dvp = NULL; 1464 1465 /* 1466 * Truncate the directory that is being deleted. 1467 */ 1468 error = detrunc(dep, (u_long) 0, IO_SYNC, NOCRED, NULL); 1469 cache_purge(DETOV(dep)); 1470 1471 out: ; 1472 if (ap->a_dvp) 1473 vput(ap->a_dvp); 1474 vput(ap->a_vp); 1475 return error; 1476 } 1477 1478 /* 1479 * DOS filesystems don't know what symlinks are. 1480 */ 1481 static int 1482 msdosfs_symlink(ap) 1483 struct vop_symlink_args /* { 1484 struct vnode *a_dvp; 1485 struct vnode **a_vpp; 1486 struct componentname *a_cnp; 1487 struct vattr *a_vap; 1488 char *a_target; 1489 } */ *ap; 1490 { 1491 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1492 vput(ap->a_dvp); 1493 return EINVAL; 1494 } 1495 1496 /* 1497 * Dummy dirents to simulate the "." and ".." entries of the root directory 1498 * in a dos filesystem. Dos doesn't provide these. Note that each entry 1499 * must be the same size as a dos directory entry (32 bytes). 1500 */ 1501 static struct dos_dirent { 1502 u_long d_fileno; 1503 u_short d_reclen; 1504 u_char d_type; 1505 u_char d_namlen; 1506 u_char d_name[24]; 1507 } rootdots[2] = { 1508 1509 { 1510 1, /* d_fileno */ 1511 sizeof(struct direntry), /* d_reclen */ 1512 DT_DIR, /* d_type */ 1513 1, /* d_namlen */ 1514 "." /* d_name */ 1515 }, 1516 { 1517 1, /* d_fileno */ 1518 sizeof(struct direntry), /* d_reclen */ 1519 DT_DIR, /* d_type */ 1520 2, /* d_namlen */ 1521 ".." /* d_name */ 1522 } 1523 }; 1524 1525 static int 1526 msdosfs_readdir(ap) 1527 struct vop_readdir_args /* { 1528 struct vnode *a_vp; 1529 struct uio *a_uio; 1530 struct ucred *a_cred; 1531 int *a_eofflag; 1532 u_long *a_cookies; 1533 int a_ncookies; 1534 } */ *ap; 1535 { 1536 int error = 0; 1537 int diff; 1538 char pushout; 1539 long n; 1540 long on; 1541 long lost; 1542 long count; 1543 u_long cn; 1544 u_long fileno; 1545 long bias = 0; 1546 daddr_t bn; 1547 daddr_t lbn; 1548 struct buf *bp; 1549 struct denode *dep = VTODE(ap->a_vp); 1550 struct msdosfsmount *pmp = dep->de_pmp; 1551 struct direntry *dentp; 1552 struct dirent *prev; 1553 struct dirent *crnt; 1554 u_char dirbuf[512]; /* holds converted dos directories */ 1555 struct uio *uio = ap->a_uio; 1556 off_t off; 1557 int ncookies = 0; 1558 1559 #ifdef MSDOSFS_DEBUG 1560 printf("msdosfs_readdir(): vp %08x, uio %08x, cred %08x, eofflagp %08x\n", 1561 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1562 #endif 1563 1564 /* 1565 * msdosfs_readdir() won't operate properly on regular files since 1566 * it does i/o only with the the filesystem vnode, and hence can 1567 * retrieve the wrong block from the buffer cache for a plain file. 1568 * So, fail attempts to readdir() on a plain file. 1569 */ 1570 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1571 return ENOTDIR; 1572 1573 /* 1574 * If the user buffer is smaller than the size of one dos directory 1575 * entry or the file offset is not a multiple of the size of a 1576 * directory entry, then we fail the read. 1577 */ 1578 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1579 lost = uio->uio_resid - count; 1580 if (count < sizeof(struct direntry) || 1581 (uio->uio_offset & (sizeof(struct direntry) - 1))) 1582 return EINVAL; 1583 uio->uio_resid = count; 1584 uio->uio_iov->iov_len = count; 1585 off = uio->uio_offset; 1586 1587 /* 1588 * If they are reading from the root directory then, we simulate 1589 * the . and .. entries since these don't exist in the root 1590 * directory. We also set the offset bias to make up for having to 1591 * simulate these entries. By this I mean that at file offset 64 we 1592 * read the first entry in the root directory that lives on disk. 1593 */ 1594 if (dep->de_StartCluster == MSDOSFSROOT) { 1595 /* 1596 * printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1597 * uio->uio_offset); 1598 */ 1599 bias = 2 * sizeof(struct direntry); 1600 if (uio->uio_offset < 2 * sizeof(struct direntry)) { 1601 if (uio->uio_offset 1602 && uio->uio_offset != sizeof(struct direntry)) { 1603 error = EINVAL; 1604 goto out; 1605 } 1606 n = 1; 1607 if (!uio->uio_offset) { 1608 n = 2; 1609 ncookies++; 1610 } 1611 ncookies++; 1612 error = uiomove((char *) rootdots + uio->uio_offset, 1613 n * sizeof(struct direntry), uio); 1614 } 1615 } 1616 while (!error && uio->uio_resid > 0) { 1617 lbn = (uio->uio_offset - bias) >> pmp->pm_cnshift; 1618 on = (uio->uio_offset - bias) & pmp->pm_crbomask; 1619 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 1620 diff = dep->de_FileSize - (uio->uio_offset - bias); 1621 if (diff <= 0) 1622 break; 1623 if (diff < n) 1624 n = diff; 1625 error = pcbmap(dep, lbn, &bn, &cn); 1626 if (error) 1627 break; 1628 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, NOCRED, &bp); 1629 n = min(n, pmp->pm_bpcluster - bp->b_resid); 1630 if (error) { 1631 brelse(bp); 1632 return error; 1633 } 1634 1635 /* 1636 * code to convert from dos directory entries to ufs 1637 * directory entries 1638 */ 1639 pushout = 0; 1640 dentp = (struct direntry *)(bp->b_data + on); 1641 prev = 0; 1642 crnt = (struct dirent *) dirbuf; 1643 while ((char *) dentp < bp->b_data + on + n) { 1644 /* 1645 * printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1646 * dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1647 */ 1648 /* 1649 * If we have an empty entry or a slot from a 1650 * deleted file, or a volume label entry just 1651 * concatenate its space onto the end of the 1652 * previous entry or, manufacture an empty entry if 1653 * there is no previous entry. 1654 */ 1655 if (dentp->deName[0] == SLOT_EMPTY || 1656 dentp->deName[0] == SLOT_DELETED || 1657 (dentp->deAttributes & ATTR_VOLUME)) { 1658 if (prev) { 1659 prev->d_reclen += sizeof(struct direntry); 1660 } else { 1661 prev = crnt; 1662 prev->d_fileno = 0; 1663 prev->d_reclen = sizeof(struct direntry); 1664 prev->d_type = DT_UNKNOWN; 1665 prev->d_namlen = 0; 1666 prev->d_name[0] = 0; 1667 ncookies++; 1668 } 1669 } else { 1670 /* 1671 * this computation of d_fileno must match 1672 * the computation of va_fileid in 1673 * msdosfs_getattr 1674 */ 1675 if (dentp->deAttributes & ATTR_DIRECTORY) { 1676 /* if this is the root directory */ 1677 fileno = getushort(dentp->deStartCluster); 1678 if (fileno == MSDOSFSROOT) 1679 fileno = 1; 1680 } else { 1681 /* 1682 * if the file's dirent lives in 1683 * root dir 1684 */ 1685 if ((fileno = cn) == MSDOSFSROOT) 1686 fileno = 1; 1687 fileno = (fileno << 16) | 1688 ((dentp - (struct direntry *) bp->b_data) & 0xffff); 1689 } 1690 crnt->d_fileno = fileno; 1691 crnt->d_reclen = sizeof(struct direntry); 1692 crnt->d_type = (dentp->deAttributes & ATTR_DIRECTORY) 1693 ? DT_DIR : DT_REG; 1694 crnt->d_namlen = dos2unixfn(dentp->deName, 1695 (u_char *)crnt->d_name); 1696 /* 1697 * printf("readdir: file %s, fileno %08x, attr %02x, start %08x\n", 1698 * crnt->d_name, crnt->d_fileno, dentp->deAttributes, 1699 * dentp->deStartCluster); 1700 */ 1701 prev = crnt; 1702 ncookies++; 1703 } 1704 dentp++; 1705 1706 crnt = (struct dirent *) ((char *) crnt + sizeof(struct direntry)); 1707 pushout = 1; 1708 1709 /* 1710 * If our intermediate buffer is full then copy its 1711 * contents to user space. I would just use the 1712 * buffer the buf header points to but, I'm afraid 1713 * that when we brelse() it someone else might find 1714 * it in the cache and think its contents are 1715 * valid. Maybe there is a way to invalidate the 1716 * buffer before brelse()'ing it. 1717 */ 1718 if ((u_char *) crnt >= &dirbuf[sizeof dirbuf]) { 1719 pushout = 0; 1720 error = uiomove(dirbuf, sizeof(dirbuf), uio); 1721 if (error) 1722 break; 1723 prev = 0; 1724 crnt = (struct dirent *) dirbuf; 1725 } 1726 } 1727 if (pushout) { 1728 pushout = 0; 1729 error = uiomove(dirbuf, (char *) crnt - (char *) dirbuf, 1730 uio); 1731 } 1732 1733 #if 0 1734 /* 1735 * If we have read everything from this block or have read 1736 * to end of file then we are done with this block. Mark 1737 * it to say the buffer can be reused if need be. 1738 */ 1739 if (n + on == pmp->pm_bpcluster || 1740 (uio->uio_offset - bias) == dep->de_FileSize) 1741 bp->b_flags |= B_AGE; 1742 #endif /* if 0 */ 1743 brelse(bp); 1744 if (n == 0) 1745 break; 1746 } 1747 out: ; 1748 uio->uio_resid += lost; 1749 if (!error && ap->a_ncookies != NULL) { 1750 struct dirent* dpStart; 1751 struct dirent* dpEnd; 1752 struct dirent* dp; 1753 u_long *cookies; 1754 u_long *cookiep; 1755 1756 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1757 panic("msdosfs_readdir: unexpected uio from NFS server"); 1758 dpStart = (struct dirent *) 1759 (uio->uio_iov->iov_base - (uio->uio_offset - off)); 1760 dpEnd = (struct dirent *) uio->uio_iov->iov_base; 1761 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 1762 for (dp = dpStart, cookiep = cookies; 1763 dp < dpEnd; 1764 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 1765 off += dp->d_reclen; 1766 *cookiep++ = (u_long) off; 1767 } 1768 *ap->a_ncookies = ncookies; 1769 *ap->a_cookies = cookies; 1770 } 1771 1772 /* 1773 * Set the eofflag (NFS uses it) 1774 */ 1775 if (ap->a_eofflag) 1776 if (dep->de_FileSize - (uio->uio_offset - bias) <= 0) 1777 *ap->a_eofflag = 1; 1778 else 1779 *ap->a_eofflag = 0; 1780 1781 return error; 1782 } 1783 1784 /* 1785 * DOS filesystems don't know what symlinks are. 1786 */ 1787 static int 1788 msdosfs_readlink(ap) 1789 struct vop_readlink_args /* { 1790 struct vnode *a_vp; 1791 struct uio *a_uio; 1792 struct ucred *a_cred; 1793 } */ *ap; 1794 { 1795 return EINVAL; 1796 } 1797 1798 static int 1799 msdosfs_abortop(ap) 1800 struct vop_abortop_args /* { 1801 struct vnode *a_dvp; 1802 struct componentname *a_cnp; 1803 } */ *ap; 1804 { 1805 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1806 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 1807 return 0; 1808 } 1809 1810 static int 1811 msdosfs_lock(ap) 1812 struct vop_lock_args /* { 1813 struct vnode *a_vp; 1814 int a_flags; 1815 struct proc *a_p; 1816 } */ *ap; 1817 { 1818 struct vnode *vp = ap->a_vp; 1819 1820 return (lockmgr(&VTODE(vp)->de_lock, ap->a_flags, &vp->v_interlock, 1821 ap->a_p)); 1822 } 1823 1824 int 1825 msdosfs_unlock(ap) 1826 struct vop_unlock_args /* { 1827 struct vnode *a_vp; 1828 int a_flags; 1829 struct proc *a_p; 1830 } */ *ap; 1831 { 1832 struct vnode *vp = ap->a_vp; 1833 1834 return (lockmgr(&VTODE(vp)->de_lock, ap->a_flags | LK_RELEASE, 1835 &vp->v_interlock, ap->a_p)); 1836 } 1837 1838 int 1839 msdosfs_islocked(ap) 1840 struct vop_islocked_args /* { 1841 struct vnode *a_vp; 1842 } */ *ap; 1843 { 1844 1845 return (lockstatus(&VTODE(ap->a_vp)->de_lock)); 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", major(dep->de_dev), minor(dep->de_dev)); 1949 lockmgr_printinfo(&dep->de_lock); 1950 printf("\n"); 1951 return 0; 1952 } 1953 1954 static int 1955 msdosfs_advlock(ap) 1956 struct vop_advlock_args /* { 1957 struct vnode *a_vp; 1958 caddr_t a_id; 1959 int a_op; 1960 struct flock *a_fl; 1961 int a_flags; 1962 } */ *ap; 1963 { 1964 return EINVAL; /* we don't do locking yet */ 1965 } 1966 1967 static int 1968 msdosfs_pathconf(ap) 1969 struct vop_pathconf_args /* { 1970 struct vnode *a_vp; 1971 int a_name; 1972 int *a_retval; 1973 } */ *ap; 1974 { 1975 switch (ap->a_name) { 1976 case _PC_LINK_MAX: 1977 *ap->a_retval = 1; 1978 return 0; 1979 case _PC_NAME_MAX: 1980 *ap->a_retval = 12; 1981 return 0; 1982 case _PC_PATH_MAX: 1983 *ap->a_retval = PATH_MAX; /* 255? */ 1984 return 0; 1985 case _PC_CHOWN_RESTRICTED: 1986 *ap->a_retval = 1; 1987 return 0; 1988 case _PC_NO_TRUNC: 1989 *ap->a_retval = 0; 1990 return 0; 1991 default: 1992 return EINVAL; 1993 } 1994 } 1995 1996 /* Global vfs data structures for msdosfs */ 1997 vop_t **msdosfs_vnodeop_p; 1998 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1999 { &vop_default_desc, (vop_t *)vn_default_error }, 2000 { &vop_lookup_desc, (vop_t *)msdosfs_lookup }, /* lookup */ 2001 { &vop_create_desc, (vop_t *)msdosfs_create }, /* create */ 2002 { &vop_mknod_desc, (vop_t *)msdosfs_mknod }, /* mknod */ 2003 { &vop_open_desc, (vop_t *)msdosfs_open }, /* open */ 2004 { &vop_close_desc, (vop_t *)msdosfs_close }, /* close */ 2005 { &vop_access_desc, (vop_t *)msdosfs_access }, /* access */ 2006 { &vop_getattr_desc, (vop_t *)msdosfs_getattr }, /* getattr */ 2007 { &vop_setattr_desc, (vop_t *)msdosfs_setattr }, /* setattr */ 2008 { &vop_read_desc, (vop_t *)msdosfs_read }, /* read */ 2009 { &vop_write_desc, (vop_t *)msdosfs_write }, /* write */ 2010 { &vop_ioctl_desc, (vop_t *)msdosfs_ioctl }, /* ioctl */ 2011 { &vop_select_desc, (vop_t *)msdosfs_select }, /* select */ 2012 { &vop_mmap_desc, (vop_t *)msdosfs_mmap }, /* mmap */ 2013 { &vop_fsync_desc, (vop_t *)msdosfs_fsync }, /* fsync */ 2014 { &vop_seek_desc, (vop_t *)msdosfs_seek }, /* seek */ 2015 { &vop_remove_desc, (vop_t *)msdosfs_remove }, /* remove */ 2016 { &vop_link_desc, (vop_t *)msdosfs_link }, /* link */ 2017 { &vop_rename_desc, (vop_t *)msdosfs_rename }, /* rename */ 2018 { &vop_mkdir_desc, (vop_t *)msdosfs_mkdir }, /* mkdir */ 2019 { &vop_rmdir_desc, (vop_t *)msdosfs_rmdir }, /* rmdir */ 2020 { &vop_symlink_desc, (vop_t *)msdosfs_symlink }, /* symlink */ 2021 { &vop_readdir_desc, (vop_t *)msdosfs_readdir }, /* readdir */ 2022 { &vop_readlink_desc, (vop_t *)msdosfs_readlink }, /* readlink */ 2023 { &vop_abortop_desc, (vop_t *)msdosfs_abortop }, /* abortop */ 2024 { &vop_inactive_desc, (vop_t *)msdosfs_inactive }, /* inactive */ 2025 { &vop_reclaim_desc, (vop_t *)msdosfs_reclaim }, /* reclaim */ 2026 { &vop_lock_desc, (vop_t *)msdosfs_lock }, /* lock */ 2027 { &vop_unlock_desc, (vop_t *)msdosfs_unlock }, /* unlock */ 2028 { &vop_bmap_desc, (vop_t *)msdosfs_bmap }, /* bmap */ 2029 { &vop_strategy_desc, (vop_t *)msdosfs_strategy }, /* strategy */ 2030 { &vop_print_desc, (vop_t *)msdosfs_print }, /* print */ 2031 { &vop_islocked_desc, (vop_t *)msdosfs_islocked }, /* islocked */ 2032 { &vop_pathconf_desc, (vop_t *)msdosfs_pathconf }, /* pathconf */ 2033 { &vop_advlock_desc, (vop_t *)msdosfs_advlock }, /* advlock */ 2034 { &vop_reallocblks_desc, (vop_t *)msdosfs_reallocblks }, /* reallocblks */ 2035 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 2036 { NULL, NULL } 2037 }; 2038 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 2039 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 2040 2041 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 2042