1 /* $Id: msdosfs_vnops.c,v 1.41 1997/04/10 14:56:49 bde 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/dirent.h> 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 70 #include <msdosfs/bpb.h> 71 #include <msdosfs/direntry.h> 72 #include <msdosfs/denode.h> 73 #include <msdosfs/msdosfsmount.h> 74 #include <msdosfs/fat.h> 75 76 /* 77 * Prototypes for MSDOSFS vnode operations 78 */ 79 static int msdosfs_create __P((struct vop_create_args *)); 80 static int msdosfs_mknod __P((struct vop_mknod_args *)); 81 static int msdosfs_open __P((struct vop_open_args *)); 82 static int msdosfs_close __P((struct vop_close_args *)); 83 static int msdosfs_access __P((struct vop_access_args *)); 84 static int msdosfs_getattr __P((struct vop_getattr_args *)); 85 static int msdosfs_setattr __P((struct vop_setattr_args *)); 86 static int msdosfs_read __P((struct vop_read_args *)); 87 static int msdosfs_write __P((struct vop_write_args *)); 88 static int msdosfs_ioctl __P((struct vop_ioctl_args *)); 89 static int msdosfs_select __P((struct vop_select_args *)); 90 static int msdosfs_mmap __P((struct vop_mmap_args *)); 91 static int msdosfs_fsync __P((struct vop_fsync_args *)); 92 static int msdosfs_seek __P((struct vop_seek_args *)); 93 static int msdosfs_remove __P((struct vop_remove_args *)); 94 static int msdosfs_link __P((struct vop_link_args *)); 95 static int msdosfs_rename __P((struct vop_rename_args *)); 96 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 97 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 98 static int msdosfs_symlink __P((struct vop_symlink_args *)); 99 static int msdosfs_readdir __P((struct vop_readdir_args *)); 100 static int msdosfs_readlink __P((struct vop_readlink_args *)); 101 static int msdosfs_abortop __P((struct vop_abortop_args *)); 102 static int msdosfs_lock __P((struct vop_lock_args *)); 103 static int msdosfs_unlock __P((struct vop_unlock_args *)); 104 static int msdosfs_bmap __P((struct vop_bmap_args *)); 105 static int msdosfs_strategy __P((struct vop_strategy_args *)); 106 static int msdosfs_print __P((struct vop_print_args *)); 107 static int msdosfs_islocked __P((struct vop_islocked_args *)); 108 static int msdosfs_advlock __P((struct vop_advlock_args *)); 109 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 110 static int msdosfs_reallocblks __P((struct vop_reallocblks_args *)); 111 112 /* 113 * Some general notes: 114 * 115 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 116 * read/written using the vnode for the filesystem. Blocks that represent 117 * the contents of a file are read/written using the vnode for the file 118 * (including directories when they are read/written as files). This 119 * presents problems for the dos filesystem because data that should be in 120 * an inode (if dos had them) resides in the directory itself. Since we 121 * must update directory entries without the benefit of having the vnode 122 * for the directory we must use the vnode for the filesystem. This means 123 * that when a directory is actually read/written (via read, write, or 124 * readdir, or seek) we must use the vnode for the filesystem instead of 125 * the vnode for the directory as would happen in ufs. This is to insure we 126 * retreive the correct block from the buffer cache since the hash value is 127 * based upon the vnode address and the desired block number. 128 */ 129 130 /* 131 * Create a regular file. On entry the directory to contain the file being 132 * created is locked. We must release before we return. We must also free 133 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 134 * only if the SAVESTART bit in cn_flags is clear on success. 135 */ 136 static int 137 msdosfs_create(ap) 138 struct vop_create_args /* { 139 struct vnode *a_dvp; 140 struct vnode **a_vpp; 141 struct componentname *a_cnp; 142 struct vattr *a_vap; 143 } */ *ap; 144 { 145 struct componentname *cnp = ap->a_cnp; 146 struct denode ndirent; 147 struct denode *dep; 148 struct denode *pdep = VTODE(ap->a_dvp); 149 struct timespec ts; 150 int error; 151 152 #ifdef MSDOSFS_DEBUG 153 printf("msdosfs_create(cnp %08x, vap %08x\n", cnp, ap->a_vap); 154 #endif 155 156 /* 157 * Create a directory entry for the file, then call createde() to 158 * have it installed. NOTE: DOS files are always executable. We 159 * use the absence of the owner write bit to make the file 160 * readonly. 161 */ 162 #ifdef DIAGNOSTIC 163 if ((cnp->cn_flags & SAVENAME) == 0) 164 panic("msdosfs_create: no name"); 165 #endif 166 bzero(&ndirent, sizeof(ndirent)); 167 TIMEVAL_TO_TIMESPEC(&time, &ts); 168 unix2dostime(&ts, &ndirent.de_Date, &ndirent.de_Time); 169 unix2dosfn((u_char *)cnp->cn_nameptr, ndirent.de_Name, cnp->cn_namelen); 170 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) 171 ? ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 172 ndirent.de_StartCluster = 0; 173 ndirent.de_FileSize = 0; 174 ndirent.de_dev = pdep->de_dev; 175 ndirent.de_devvp = pdep->de_devvp; 176 if ((error = createde(&ndirent, pdep, &dep)) == 0) { 177 *ap->a_vpp = DETOV(dep); 178 if ((cnp->cn_flags & SAVESTART) == 0) 179 free(cnp->cn_pnbuf, M_NAMEI); 180 } else { 181 free(cnp->cn_pnbuf, M_NAMEI); 182 } 183 vput(ap->a_dvp); /* release parent dir */ 184 return error; 185 } 186 187 static int 188 msdosfs_mknod(ap) 189 struct vop_mknod_args /* { 190 struct vnode *a_dvp; 191 struct vnode **a_vpp; 192 struct componentname *a_cnp; 193 struct vattr *a_vap; 194 } */ *ap; 195 { 196 int error; 197 198 switch (ap->a_vap->va_type) { 199 case VDIR: 200 error = msdosfs_mkdir((struct vop_mkdir_args *)ap); 201 break; 202 203 case VREG: 204 error = msdosfs_create((struct vop_create_args *)ap); 205 break; 206 207 default: 208 error = EINVAL; 209 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 210 vput(ap->a_dvp); 211 break; 212 } 213 return error; 214 } 215 216 static int 217 msdosfs_open(ap) 218 struct vop_open_args /* { 219 struct vnode *a_vp; 220 int a_mode; 221 struct ucred *a_cred; 222 struct proc *a_p; 223 } */ *ap; 224 { 225 return 0; 226 } 227 228 static int 229 msdosfs_close(ap) 230 struct vop_close_args /* { 231 struct vnode *a_vp; 232 int a_fflag; 233 struct ucred *a_cred; 234 struct proc *a_p; 235 } */ *ap; 236 { 237 struct vnode *vp = ap->a_vp; 238 struct denode *dep = VTODE(vp); 239 240 simple_lock(&vp->v_interlock); 241 if (vp->v_usecount > 1) 242 DE_TIMES(dep, &time); 243 simple_unlock(&vp->v_interlock); 244 return 0; 245 } 246 247 static int 248 msdosfs_access(ap) 249 struct vop_access_args /* { 250 struct vnode *a_vp; 251 int a_mode; 252 struct ucred *a_cred; 253 struct proc *a_p; 254 } */ *ap; 255 { 256 struct vnode *vp = ap->a_vp; 257 struct denode *dep = VTODE(ap->a_vp); 258 struct msdosfsmount *pmp = dep->de_pmp; 259 struct ucred *cred = ap->a_cred; 260 mode_t mask, file_mode, mode = ap->a_mode; 261 register gid_t *gp; 262 int i; 263 264 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 265 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 266 file_mode &= pmp->pm_mask; 267 268 /* 269 * Disallow write attempts on read-only file systems; 270 * unless the file is a socket, fifo, or a block or 271 * character device resident on the file system. 272 */ 273 if (mode & VWRITE) { 274 switch (vp->v_type) { 275 case VDIR: 276 case VLNK: 277 case VREG: 278 if (vp->v_mount->mnt_flag & MNT_RDONLY) 279 return (EROFS); 280 break; 281 } 282 } 283 284 /* User id 0 always gets access. */ 285 if (cred->cr_uid == 0) 286 return 0; 287 288 mask = 0; 289 290 /* Otherwise, check the owner. */ 291 if (cred->cr_uid == pmp->pm_uid) { 292 if (mode & VEXEC) 293 mask |= S_IXUSR; 294 if (mode & VREAD) 295 mask |= S_IRUSR; 296 if (mode & VWRITE) 297 mask |= S_IWUSR; 298 return (file_mode & mask) == mask ? 0 : EACCES; 299 } 300 301 /* Otherwise, check the groups. */ 302 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 303 if (pmp->pm_gid == *gp) { 304 if (mode & VEXEC) 305 mask |= S_IXGRP; 306 if (mode & VREAD) 307 mask |= S_IRGRP; 308 if (mode & VWRITE) 309 mask |= S_IWGRP; 310 return (file_mode & mask) == mask ? 0 : EACCES; 311 } 312 313 /* Otherwise, check everyone else. */ 314 if (mode & VEXEC) 315 mask |= S_IXOTH; 316 if (mode & VREAD) 317 mask |= S_IROTH; 318 if (mode & VWRITE) 319 mask |= S_IWOTH; 320 return (file_mode & mask) == mask ? 0 : EACCES; 321 } 322 323 static int 324 msdosfs_getattr(ap) 325 struct vop_getattr_args /* { 326 struct vnode *a_vp; 327 struct vattr *a_vap; 328 struct ucred *a_cred; 329 struct proc *a_p; 330 } */ *ap; 331 { 332 u_int cn; 333 struct denode *dep = VTODE(ap->a_vp); 334 struct vattr *vap = ap->a_vap; 335 336 DE_TIMES(dep, &time); 337 vap->va_fsid = dep->de_dev; 338 /* 339 * The following computation of the fileid must be the same as that 340 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 341 * doesn't work. 342 */ 343 if (dep->de_Attributes & ATTR_DIRECTORY) { 344 if ((cn = dep->de_StartCluster) == MSDOSFSROOT) 345 cn = 1; 346 } else { 347 if ((cn = dep->de_dirclust) == MSDOSFSROOT) 348 cn = 1; 349 cn = (cn << 16) | (dep->de_diroffset & 0xffff); 350 } 351 vap->va_fileid = cn; 352 vap->va_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 353 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 354 vap->va_mode &= dep->de_pmp->pm_mask; 355 if (dep->de_Attributes & ATTR_DIRECTORY) 356 vap->va_mode |= S_IFDIR; 357 vap->va_nlink = 1; 358 vap->va_gid = dep->de_pmp->pm_gid; 359 vap->va_uid = dep->de_pmp->pm_uid; 360 vap->va_rdev = 0; 361 vap->va_size = dep->de_FileSize; 362 dos2unixtime(dep->de_Date, dep->de_Time, &vap->va_atime); 363 vap->va_mtime = vap->va_atime; 364 #if 0 365 #ifndef MSDOSFS_NODIRMOD 366 if (vap->va_mode & S_IFDIR) 367 TIMEVAL_TO_TIMESPEC(&time, &vap->va_mtime); 368 #endif 369 #endif 370 vap->va_ctime = vap->va_atime; 371 vap->va_flags = (dep->de_Attributes & ATTR_ARCHIVE) ? 0 : SF_ARCHIVED; 372 vap->va_gen = 0; 373 vap->va_blocksize = dep->de_pmp->pm_bpcluster; 374 vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) & 375 ~(dep->de_pmp->pm_crbomask); 376 vap->va_type = ap->a_vp->v_type; 377 vap->va_filerev = dep->de_modrev; 378 return 0; 379 } 380 381 static int 382 msdosfs_setattr(ap) 383 struct vop_setattr_args /* { 384 struct vnode *a_vp; 385 struct vattr *a_vap; 386 struct ucred *a_cred; 387 struct proc *a_p; 388 } */ *ap; 389 { 390 struct vnode *vp = ap->a_vp; 391 struct denode *dep = VTODE(ap->a_vp); 392 struct vattr *vap = ap->a_vap; 393 struct ucred *cred = ap->a_cred; 394 int error = 0; 395 396 /* 397 * Check for unsettable attributes. 398 */ 399 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 400 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 401 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 402 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 403 return (EINVAL); 404 } 405 if (vap->va_flags != VNOVAL) { 406 if (vp->v_mount->mnt_flag & MNT_RDONLY) 407 return (EROFS); 408 if (cred->cr_uid != dep->de_pmp->pm_uid && 409 (error = suser(cred, &ap->a_p->p_acflag))) 410 return (error); 411 /* 412 * We are very inconsistent about handling unsupported 413 * attributes. We ignored the the access time and the 414 * read and execute bits. We were strict for the other 415 * attributes. 416 * 417 * Here we are strict, stricter than ufs in not allowing 418 * users to attempt to set SF_SETTABLE bits or anyone to 419 * set unsupported bits. However, we ignore attempts to 420 * set ATTR_ARCHIVE for directories `cp -pr' from a more 421 * sensible file system attempts it a lot. 422 */ 423 if (cred->cr_uid != 0) { 424 if (vap->va_flags & SF_SETTABLE) 425 return EPERM; 426 } 427 if (vap->va_flags & ~SF_ARCHIVED) 428 return EINVAL; 429 if (vap->va_flags & SF_ARCHIVED) 430 dep->de_Attributes &= ~ATTR_ARCHIVE; 431 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 432 dep->de_Attributes |= ATTR_ARCHIVE; 433 dep->de_flag |= DE_MODIFIED; 434 } 435 436 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 437 if (vp->v_mount->mnt_flag & MNT_RDONLY) 438 return (EROFS); 439 if ((cred->cr_uid != dep->de_pmp->pm_uid || 440 vap->va_uid != dep->de_pmp->pm_uid || 441 (vap->va_gid != dep->de_pmp->pm_gid && 442 !groupmember(vap->va_gid, cred))) && 443 (error = suser(cred, &ap->a_p->p_acflag))) 444 return error; 445 if (vap->va_uid != dep->de_pmp->pm_uid || 446 vap->va_gid != dep->de_pmp->pm_gid) 447 return EINVAL; 448 } 449 if (vap->va_size != VNOVAL) { 450 /* 451 * Disallow write attempts on read-only file systems; 452 * unless the file is a socket, fifo, or a block or 453 * character device resident on the file system. 454 */ 455 switch (vp->v_type) { 456 case VDIR: 457 return (EISDIR); 458 case VLNK: 459 case VREG: 460 if (vp->v_mount->mnt_flag & MNT_RDONLY) 461 return (EROFS); 462 break; 463 } 464 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 465 if (error) 466 return error; 467 } 468 if (vap->va_mtime.tv_sec != VNOVAL) { 469 if (vp->v_mount->mnt_flag & MNT_RDONLY) 470 return (EROFS); 471 if (cred->cr_uid != dep->de_pmp->pm_uid && 472 (error = suser(cred, &ap->a_p->p_acflag)) && 473 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 474 (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_p)))) 475 return error; 476 dep->de_flag |= DE_UPDATE; 477 error = deupdat(dep, &vap->va_mtime, 1); 478 if (error) 479 return error; 480 } 481 482 /* 483 * DOS files only have the ability to have their writability 484 * attribute set, so we use the owner write bit to set the readonly 485 * attribute. 486 */ 487 error = 0; 488 if (vap->va_mode != (u_short) VNOVAL) { 489 if (vp->v_mount->mnt_flag & MNT_RDONLY) 490 return (EROFS); 491 if (cred->cr_uid != dep->de_pmp->pm_uid && 492 (error = suser(cred, &ap->a_p->p_acflag))) 493 return error; 494 495 /* We ignore the read and execute bits */ 496 if (vap->va_mode & VWRITE) 497 dep->de_Attributes &= ~ATTR_READONLY; 498 else 499 dep->de_Attributes |= ATTR_READONLY; 500 dep->de_flag |= DE_MODIFIED; 501 } 502 return error; 503 } 504 505 static int 506 msdosfs_read(ap) 507 struct vop_read_args /* { 508 struct vnode *a_vp; 509 struct uio *a_uio; 510 int a_ioflag; 511 struct ucred *a_cred; 512 } */ *ap; 513 { 514 int error = 0; 515 int diff; 516 int isadir; 517 long n; 518 long on; 519 daddr_t lbn; 520 daddr_t rablock; 521 int rasize; 522 struct buf *bp; 523 struct vnode *vp = ap->a_vp; 524 struct denode *dep = VTODE(vp); 525 struct msdosfsmount *pmp = dep->de_pmp; 526 struct uio *uio = ap->a_uio; 527 528 /* 529 * If they didn't ask for any data, then we are done. 530 */ 531 if (uio->uio_resid == 0) 532 return 0; 533 if (uio->uio_offset < 0) 534 return EINVAL; 535 536 isadir = dep->de_Attributes & ATTR_DIRECTORY; 537 do { 538 lbn = uio->uio_offset >> pmp->pm_cnshift; 539 on = uio->uio_offset & pmp->pm_crbomask; 540 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 541 diff = dep->de_FileSize - uio->uio_offset; 542 if (diff <= 0) 543 return 0; 544 /* convert cluster # to block # if a directory */ 545 if (isadir) { 546 error = pcbmap(dep, lbn, &lbn, 0); 547 if (error) 548 return error; 549 } 550 if (diff < n) 551 n = diff; 552 /* 553 * If we are operating on a directory file then be sure to 554 * do i/o with the vnode for the filesystem instead of the 555 * vnode for the directory. 556 */ 557 if (isadir) { 558 error = bread(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 559 NOCRED, &bp); 560 } else { 561 rablock = lbn + 1; 562 #ifdef PC98 563 /* 564 * 1024byte/sector support 565 */ 566 if (pmp->pm_BytesPerSec == 1024) 567 vp->v_flag |= 0x10000; 568 #endif 569 if (vp->v_lastr + 1 == lbn && 570 rablock * pmp->pm_bpcluster < dep->de_FileSize) { 571 rasize = pmp->pm_bpcluster; 572 error = breadn(vp, lbn, pmp->pm_bpcluster, 573 &rablock, &rasize, 1, 574 NOCRED, &bp); 575 } else { 576 error = bread(vp, lbn, pmp->pm_bpcluster, NOCRED, 577 &bp); 578 } 579 vp->v_lastr = lbn; 580 } 581 n = min(n, pmp->pm_bpcluster - bp->b_resid); 582 if (error) { 583 brelse(bp); 584 return error; 585 } 586 error = uiomove(bp->b_data + on, (int) n, uio); 587 /* 588 * If we have read everything from this block or have read 589 * to end of file then we are done with this block. Mark 590 * it to say the buffer can be reused if need be. 591 */ 592 #if 0 593 if (n + on == pmp->pm_bpcluster || 594 uio->uio_offset == dep->de_FileSize) 595 bp->b_flags |= B_AGE; 596 #endif 597 brelse(bp); 598 } while (error == 0 && uio->uio_resid > 0 && n != 0); 599 return error; 600 } 601 602 /* 603 * Write data to a file or directory. 604 */ 605 static int 606 msdosfs_write(ap) 607 struct vop_write_args /* { 608 struct vnode *a_vp; 609 struct uio *a_uio; 610 int a_ioflag; 611 struct ucred *a_cred; 612 } */ *ap; 613 { 614 int n; 615 int isadir; 616 int croffset; 617 int resid; 618 int osize; 619 int error = 0; 620 u_long count; 621 daddr_t bn, lastcn; 622 struct buf *bp; 623 int ioflag = ap->a_ioflag; 624 struct uio *uio = ap->a_uio; 625 struct proc *p = uio->uio_procp; 626 struct vnode *vp = ap->a_vp; 627 struct vnode *thisvp; 628 struct denode *dep = VTODE(vp); 629 struct msdosfsmount *pmp = dep->de_pmp; 630 struct ucred *cred = ap->a_cred; 631 struct timespec ts; 632 633 #ifdef MSDOSFS_DEBUG 634 printf("msdosfs_write(vp %08x, uio %08x, ioflag %08x, cred %08x\n", 635 vp, uio, ioflag, cred); 636 printf("msdosfs_write(): diroff %d, dirclust %d, startcluster %d\n", 637 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 638 #endif 639 640 switch (vp->v_type) { 641 case VREG: 642 if (ioflag & IO_APPEND) 643 uio->uio_offset = dep->de_FileSize; 644 isadir = 0; 645 thisvp = vp; 646 break; 647 648 case VDIR: 649 if ((ioflag & IO_SYNC) == 0) 650 panic("msdosfs_write(): non-sync directory update"); 651 isadir = 1; 652 thisvp = pmp->pm_devvp; 653 break; 654 655 default: 656 panic("msdosfs_write(): bad file type"); 657 break; 658 } 659 660 if (uio->uio_offset < 0) 661 return EINVAL; 662 663 if (uio->uio_resid == 0) 664 return 0; 665 666 /* 667 * If they've exceeded their filesize limit, tell them about it. 668 */ 669 if (vp->v_type == VREG && p && 670 ((uio->uio_offset + uio->uio_resid) > 671 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 672 psignal(p, SIGXFSZ); 673 return EFBIG; 674 } 675 676 /* 677 * If attempting to write beyond the end of the root directory we 678 * stop that here because the root directory can not grow. 679 */ 680 if ((dep->de_Attributes & ATTR_DIRECTORY) && 681 dep->de_StartCluster == MSDOSFSROOT && 682 (uio->uio_offset + uio->uio_resid) > dep->de_FileSize) 683 return ENOSPC; 684 685 /* 686 * If the offset we are starting the write at is beyond the end of 687 * the file, then they've done a seek. Unix filesystems allow 688 * files with holes in them, DOS doesn't so we must fill the hole 689 * with zeroed blocks. 690 */ 691 if (uio->uio_offset > dep->de_FileSize) { 692 error = deextend(dep, uio->uio_offset, cred); 693 if (error) 694 return error; 695 } 696 697 /* 698 * Remember some values in case the write fails. 699 */ 700 resid = uio->uio_resid; 701 osize = dep->de_FileSize; 702 703 704 #ifdef PC98 705 /* 706 * 1024byte/sector support 707 */ 708 if (pmp->pm_BytesPerSec == 1024) 709 thisvp->v_flag |= 0x10000; 710 #endif 711 /* 712 * If we write beyond the end of the file, extend it to its ultimate 713 * size ahead of the time to hopefully get a contiguous area. 714 */ 715 if (uio->uio_offset + resid > osize) { 716 count = de_clcount(pmp, uio->uio_offset + resid) - de_clcount(pmp, osize); 717 if ((error = extendfile(dep, count, NULL, NULL, 0)) 718 && (error != ENOSPC || (ioflag & IO_UNIT))) 719 goto errexit; 720 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 721 } else 722 lastcn = de_clcount(pmp, osize) - 1; 723 724 do { 725 bn = de_blk(pmp, uio->uio_offset); 726 if (isadir) { 727 error = pcbmap(dep, bn, &bn, 0); 728 if (error) 729 break; 730 } else if (bn > lastcn) { 731 error = ENOSPC; 732 break; 733 } 734 735 croffset = uio->uio_offset & pmp->pm_crbomask; 736 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 737 if (uio->uio_offset + n > dep->de_FileSize) { 738 dep->de_FileSize = uio->uio_offset + n; 739 /* The object size needs to be set before buffer is allocated */ 740 vnode_pager_setsize(vp, dep->de_FileSize); 741 } 742 743 if ((uio->uio_offset & pmp->pm_crbomask) == 0 744 && (de_blk(pmp, uio->uio_offset + uio->uio_resid) > de_blk(pmp, uio->uio_offset) 745 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 746 /* 747 * If either the whole cluster gets written, 748 * or we write the cluster from its start beyond EOF, 749 * then no need to read data from disk. 750 */ 751 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 752 clrbuf(bp); 753 /* 754 * Do the bmap now, since pcbmap needs buffers 755 * for the fat table. (see msdosfs_strategy) 756 */ 757 if (!isadir) { 758 if (bp->b_blkno == bp->b_lblkno) { 759 error = pcbmap(dep, bp->b_lblkno, 760 &bp->b_blkno, 0); 761 if (error) 762 bp->b_blkno = -1; 763 } 764 if (bp->b_blkno == -1) { 765 brelse(bp); 766 if (!error) 767 error = EIO; /* XXX */ 768 break; 769 } 770 } 771 } else { 772 /* 773 * The block we need to write into exists, so read it in. 774 */ 775 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 776 if (error) 777 break; 778 } 779 780 /* 781 * Should these vnode_pager_* functions be done on dir 782 * files? 783 */ 784 785 /* 786 * Copy the data from user space into the buf header. 787 */ 788 error = uiomove(bp->b_data + croffset, n, uio); 789 790 /* 791 * If they want this synchronous then write it and wait for 792 * it. Otherwise, if on a cluster boundary write it 793 * asynchronously so we can move on to the next block 794 * without delay. Otherwise do a delayed write because we 795 * may want to write somemore into the block later. 796 */ 797 if (ioflag & IO_SYNC) 798 (void) bwrite(bp); 799 else if (n + croffset == pmp->pm_bpcluster) { 800 bawrite(bp); 801 } else 802 bdwrite(bp); 803 dep->de_flag |= DE_UPDATE; 804 } while (error == 0 && uio->uio_resid > 0); 805 806 /* 807 * If the write failed and they want us to, truncate the file back 808 * to the size it was before the write was attempted. 809 */ 810 errexit: 811 if (error) { 812 if (ioflag & IO_UNIT) { 813 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 814 uio->uio_offset -= resid - uio->uio_resid; 815 uio->uio_resid = resid; 816 } else { 817 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 818 if (uio->uio_resid != resid) 819 error = 0; 820 } 821 } else if (ioflag & IO_SYNC) { 822 TIMEVAL_TO_TIMESPEC(&time, &ts); 823 error = deupdat(dep, &ts, 1); 824 } 825 return error; 826 } 827 828 static int 829 msdosfs_ioctl(ap) 830 struct vop_ioctl_args /* { 831 struct vnode *a_vp; 832 int a_command; 833 caddr_t a_data; 834 int a_fflag; 835 struct ucred *a_cred; 836 struct proc *a_p; 837 } */ *ap; 838 { 839 return ENOTTY; 840 } 841 842 static int 843 msdosfs_select(ap) 844 struct vop_select_args /* { 845 struct vnode *a_vp; 846 int a_which; 847 int a_fflags; 848 struct ucred *a_cred; 849 struct proc *a_p; 850 } */ *ap; 851 { 852 return 1; /* DOS filesystems never block? */ 853 } 854 855 static int 856 msdosfs_mmap(ap) 857 struct vop_mmap_args /* { 858 struct vnode *a_vp; 859 int a_fflags; 860 struct ucred *a_cred; 861 struct proc *a_p; 862 } */ *ap; 863 { 864 return EINVAL; 865 } 866 867 /* 868 * Flush the blocks of a file to disk. 869 * 870 * This function is worthless for vnodes that represent directories. Maybe we 871 * could just do a sync if they try an fsync on a directory file. 872 */ 873 static int 874 msdosfs_fsync(ap) 875 struct vop_fsync_args /* { 876 struct vnode *a_vp; 877 struct ucred *a_cred; 878 int a_waitfor; 879 struct proc *a_p; 880 } */ *ap; 881 { 882 register struct vnode *vp = ap->a_vp; 883 register struct buf *bp; 884 int wait = ap->a_waitfor == MNT_WAIT; 885 struct timespec ts; 886 struct buf *nbp; 887 int s; 888 889 /* 890 * Flush all dirty buffers associated with a vnode. 891 */ 892 loop: 893 s = splbio(); 894 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 895 nbp = bp->b_vnbufs.le_next; 896 if ((bp->b_flags & B_BUSY)) 897 continue; 898 if ((bp->b_flags & B_DELWRI) == 0) 899 panic("msdosfs_fsync: not dirty"); 900 bremfree(bp); 901 bp->b_flags |= B_BUSY; 902 splx(s); 903 (void) bwrite(bp); 904 goto loop; 905 } 906 while (vp->v_numoutput) { 907 vp->v_flag |= VBWAIT; 908 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 909 } 910 #ifdef DIAGNOSTIC 911 if (vp->v_dirtyblkhd.lh_first) { 912 vprint("msdosfs_fsync: dirty", vp); 913 goto loop; 914 } 915 #endif 916 splx(s); 917 TIMEVAL_TO_TIMESPEC(&time, &ts); 918 return deupdat(VTODE(vp), &ts, wait); 919 } 920 921 /* 922 * Now the whole work of extending a file is done in the write function. 923 * So nothing to do here. 924 */ 925 static int 926 msdosfs_seek(ap) 927 struct vop_seek_args /* { 928 struct vnode *a_vp; 929 off_t a_oldoff; 930 off_t a_newoff; 931 struct ucred *a_cred; 932 } */ *ap; 933 { 934 return 0; 935 } 936 937 static int 938 msdosfs_remove(ap) 939 struct vop_remove_args /* { 940 struct vnode *a_dvp; 941 struct vnode *a_vp; 942 struct componentname *a_cnp; 943 } */ *ap; 944 { 945 int error; 946 struct denode *dep = VTODE(ap->a_vp); 947 struct denode *ddep = VTODE(ap->a_dvp); 948 949 error = removede(ddep,dep); 950 #ifdef MSDOSFS_DEBUG 951 printf("msdosfs_remove(), dep %08x, v_usecount %d\n", dep, ap->a_vp->v_usecount); 952 #endif 953 if (ddep == dep) 954 vrele(ap->a_vp); 955 else 956 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 957 * via vrele() */ 958 vput(ap->a_dvp); 959 return error; 960 } 961 962 /* 963 * DOS filesystems don't know what links are. But since we already called 964 * msdosfs_lookup() with create and lockparent, the parent is locked so we 965 * have to free it before we return the error. 966 */ 967 static int 968 msdosfs_link(ap) 969 struct vop_link_args /* { 970 struct vnode *a_tdvp; 971 struct vnode *a_vp; 972 struct componentname *a_cnp; 973 } */ *ap; 974 { 975 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 976 vput(ap->a_tdvp); 977 return EOPNOTSUPP; 978 } 979 980 /* 981 * Renames on files require moving the denode to a new hash queue since the 982 * denode's location is used to compute which hash queue to put the file 983 * in. Unless it is a rename in place. For example "mv a b". 984 * 985 * What follows is the basic algorithm: 986 * 987 * if (file move) { 988 * if (dest file exists) { 989 * remove dest file 990 * } 991 * if (dest and src in same directory) { 992 * rewrite name in existing directory slot 993 * } else { 994 * write new entry in dest directory 995 * update offset and dirclust in denode 996 * move denode to new hash chain 997 * clear old directory entry 998 * } 999 * } else { 1000 * directory move 1001 * if (dest directory exists) { 1002 * if (dest is not empty) { 1003 * return ENOTEMPTY 1004 * } 1005 * remove dest directory 1006 * } 1007 * if (dest and src in same directory) { 1008 * rewrite name in existing entry 1009 * } else { 1010 * be sure dest is not a child of src directory 1011 * write entry in dest directory 1012 * update "." and ".." in moved directory 1013 * clear old directory entry for moved directory 1014 * } 1015 * } 1016 * 1017 * On entry: 1018 * source's parent directory is unlocked 1019 * source file or directory is unlocked 1020 * destination's parent directory is locked 1021 * destination file or directory is locked if it exists 1022 * 1023 * On exit: 1024 * all denodes should be released 1025 * 1026 * Notes: 1027 * I'm not sure how the memory containing the pathnames pointed at by the 1028 * componentname structures is freed, there may be some memory bleeding 1029 * for each rename done. 1030 */ 1031 static int 1032 msdosfs_rename(ap) 1033 struct vop_rename_args /* { 1034 struct vnode *a_fdvp; 1035 struct vnode *a_fvp; 1036 struct componentname *a_fcnp; 1037 struct vnode *a_tdvp; 1038 struct vnode *a_tvp; 1039 struct componentname *a_tcnp; 1040 } */ *ap; 1041 { 1042 u_char toname[11]; 1043 int error; 1044 int newparent = 0; 1045 int sourceisadirectory = 0; 1046 u_long cn; 1047 daddr_t bn; 1048 struct vnode *tvp = ap->a_tvp; 1049 struct componentname *fcnp = ap->a_fcnp; 1050 struct proc *p = fcnp->cn_proc; 1051 struct denode *fddep; /* from file's parent directory */ 1052 struct denode *fdep; /* from file or directory */ 1053 struct denode *tddep; /* to file's parent directory */ 1054 struct denode *tdep; /* to file or directory */ 1055 struct msdosfsmount *pmp; 1056 struct direntry *dotdotp; 1057 struct direntry *ep; 1058 struct buf *bp; 1059 1060 fddep = VTODE(ap->a_fdvp); 1061 fdep = VTODE(ap->a_fvp); 1062 tddep = VTODE(ap->a_tdvp); 1063 tdep = tvp ? VTODE(tvp) : NULL; 1064 pmp = fddep->de_pmp; 1065 1066 /* Check for cross-device rename */ 1067 if ((ap->a_fvp->v_mount != ap->a_tdvp->v_mount) || 1068 (tvp && (ap->a_fvp->v_mount != tvp->v_mount))) { 1069 error = EXDEV; 1070 goto bad; 1071 } 1072 1073 /* 1074 * Convert the filename in tcnp into a dos filename. We copy this 1075 * into the denode and directory entry for the destination 1076 * file/directory. 1077 */ 1078 unix2dosfn((u_char *) ap->a_tcnp->cn_nameptr, 1079 toname, ap->a_tcnp->cn_namelen); 1080 1081 /* 1082 * At this point this is the lock state of the denodes: 1083 * fddep referenced 1084 * fdep referenced 1085 * tddep locked 1086 * tdep locked if it exists 1087 */ 1088 1089 /* 1090 * Be sure we are not renaming ".", "..", or an alias of ".". This 1091 * leads to a crippled directory tree. It's pretty tough to do a 1092 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1093 * doesn't work if the ".." entry is missing. 1094 */ 1095 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1096 if ((ap->a_fcnp->cn_namelen == 1 1097 && ap->a_fcnp->cn_nameptr[0] == '.') 1098 || fddep == fdep 1099 || (ap->a_fcnp->cn_flags | ap->a_tcnp->cn_flags) 1100 & ISDOTDOT) { 1101 VOP_ABORTOP(ap->a_tdvp, ap->a_tcnp); 1102 vput(ap->a_tdvp); 1103 if (tvp) 1104 vput(tvp); 1105 VOP_ABORTOP(ap->a_fdvp, ap->a_fcnp); 1106 vrele(ap->a_fdvp); 1107 vrele(ap->a_fvp); 1108 return EINVAL; 1109 } 1110 sourceisadirectory = 1; 1111 } 1112 1113 /* 1114 * If we are renaming a directory, and the directory is being moved 1115 * to another directory, then we must be sure the destination 1116 * directory is not in the subtree of the source directory. This 1117 * could orphan everything under the source directory. 1118 * doscheckpath() unlocks the destination's parent directory so we 1119 * must look it up again to relock it. 1120 */ 1121 if (fddep->de_StartCluster != tddep->de_StartCluster) 1122 newparent = 1; 1123 if (sourceisadirectory && newparent) { 1124 if (tdep) { 1125 vput(ap->a_tvp); 1126 tdep = NULL; 1127 } 1128 /* doscheckpath() vput()'s tddep */ 1129 error = doscheckpath(fdep, tddep); 1130 tddep = NULL; 1131 if (error) 1132 goto bad; 1133 if ((ap->a_tcnp->cn_flags & SAVESTART) == 0) 1134 panic("msdosfs_rename(): lost to startdir"); 1135 error = relookup(ap->a_tdvp, &tvp, ap->a_tcnp); 1136 if (error) 1137 goto bad; 1138 tddep = VTODE(ap->a_tdvp); 1139 tdep = tvp ? VTODE(tvp) : NULL; 1140 } 1141 1142 /* 1143 * If the destination exists, then be sure its type (file or dir) 1144 * matches that of the source. And, if it is a directory make sure 1145 * it is empty. Then delete the destination. 1146 */ 1147 if (tdep) { 1148 if (tdep->de_Attributes & ATTR_DIRECTORY) { 1149 if (!sourceisadirectory) { 1150 error = ENOTDIR; 1151 goto bad; 1152 } 1153 if (!dosdirempty(tdep)) { 1154 error = ENOTEMPTY; 1155 goto bad; 1156 } 1157 cache_purge(DETOV(tddep)); 1158 } else { /* destination is file */ 1159 if (sourceisadirectory) { 1160 error = EISDIR; 1161 goto bad; 1162 } 1163 } 1164 error = removede(tddep,tdep); 1165 if (error) 1166 goto bad; 1167 vput(ap->a_tvp); 1168 tdep = NULL; 1169 } 1170 1171 /* 1172 * If the source and destination are in the same directory then 1173 * just read in the directory entry, change the name in the 1174 * directory entry and write it back to disk. 1175 */ 1176 if (newparent == 0) { 1177 /* tddep and fddep point to the same denode here */ 1178 vn_lock(ap->a_fvp, LK_EXCLUSIVE, p); /* ap->a_fdvp is already locked */ 1179 error = readep(fddep->de_pmp, fdep->de_dirclust, 1180 fdep->de_diroffset, &bp, &ep); 1181 if (error) { 1182 VOP_UNLOCK(ap->a_fvp, 0, p); 1183 goto bad; 1184 } 1185 bcopy(toname, ep->deName, 11); 1186 error = bwrite(bp); 1187 if (error) { 1188 VOP_UNLOCK(ap->a_fvp, 0, p); 1189 goto bad; 1190 } 1191 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1192 /* 1193 * fdep locked fddep and tddep point to the same denode 1194 * which is locked tdep is NULL 1195 */ 1196 } else { 1197 u_long dirsize = 0L; 1198 1199 /* 1200 * If the source and destination are in different 1201 * directories, then mark the entry in the source directory 1202 * as deleted and write a new entry in the destination 1203 * directory. Then move the denode to the correct hash 1204 * chain for its new location in the filesystem. And, if 1205 * we moved a directory, then update its .. entry to point 1206 * to the new parent directory. If we moved a directory 1207 * will also insure that the directory entry on disk has a 1208 * filesize of zero. 1209 */ 1210 vn_lock(ap->a_fvp, LK_EXCLUSIVE, p); 1211 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1212 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1213 dirsize = fdep->de_FileSize; 1214 fdep->de_FileSize = 0; 1215 } 1216 error = createde(fdep, tddep, (struct denode **) 0); 1217 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1218 fdep->de_FileSize = dirsize; 1219 } 1220 if (error) { 1221 /* should put back filename */ 1222 VOP_UNLOCK(ap->a_fvp, 0, p); 1223 goto bad; 1224 } 1225 vn_lock(ap->a_fdvp, LK_EXCLUSIVE, p); 1226 error = readep(fddep->de_pmp, fddep->de_fndclust, 1227 fddep->de_fndoffset, &bp, &ep); 1228 if (error) { 1229 VOP_UNLOCK(ap->a_fvp, 0, p); 1230 VOP_UNLOCK(ap->a_fdvp, 0, p); 1231 goto bad; 1232 } 1233 ep->deName[0] = SLOT_DELETED; 1234 error = bwrite(bp); 1235 if (error) { 1236 VOP_UNLOCK(ap->a_fvp, 0, p); 1237 VOP_UNLOCK(ap->a_fdvp, 0, p); 1238 goto bad; 1239 } 1240 if (!sourceisadirectory) { 1241 fdep->de_dirclust = tddep->de_fndclust; 1242 fdep->de_diroffset = tddep->de_fndoffset; 1243 reinsert(fdep); 1244 } 1245 VOP_UNLOCK(ap->a_fdvp, 0, p); 1246 } 1247 /* fdep is still locked here */ 1248 1249 /* 1250 * If we moved a directory to a new parent directory, then we must 1251 * fixup the ".." entry in the moved directory. 1252 */ 1253 if (sourceisadirectory && newparent) { 1254 cn = fdep->de_StartCluster; 1255 if (cn == MSDOSFSROOT) { 1256 /* this should never happen */ 1257 panic("msdosfs_rename(): updating .. in root directory?"); 1258 } else { 1259 bn = cntobn(pmp, cn); 1260 } 1261 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1262 NOCRED, &bp); 1263 if (error) { 1264 /* should really panic here, fs is corrupt */ 1265 VOP_UNLOCK(ap->a_fvp, 0, p); 1266 goto bad; 1267 } 1268 dotdotp = (struct direntry *) bp->b_data + 1; 1269 putushort(dotdotp->deStartCluster, tddep->de_StartCluster); 1270 error = bwrite(bp); 1271 VOP_UNLOCK(ap->a_fvp, 0, p); 1272 if (error) { 1273 /* should really panic here, fs is corrupt */ 1274 goto bad; 1275 } 1276 } else 1277 VOP_UNLOCK(ap->a_fvp, 0, p); 1278 bad: ; 1279 vrele(DETOV(fdep)); 1280 vrele(DETOV(fddep)); 1281 if (tdep) 1282 vput(DETOV(tdep)); 1283 if (tddep) 1284 vput(DETOV(tddep)); 1285 return error; 1286 } 1287 1288 static struct { 1289 struct direntry dot; 1290 struct direntry dotdot; 1291 } dosdirtemplate = { 1292 { 1293 ". ", " ", /* the . entry */ 1294 ATTR_DIRECTORY, /* file attribute */ 1295 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1296 {210, 4}, {210, 4}, /* time and date */ 1297 {0, 0}, /* startcluster */ 1298 {0, 0, 0, 0}, /* filesize */ 1299 },{ 1300 ".. ", " ", /* the .. entry */ 1301 ATTR_DIRECTORY, /* file attribute */ 1302 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1303 {210, 4}, {210, 4}, /* time and date */ 1304 {0, 0}, /* startcluster */ 1305 {0, 0, 0, 0}, /* filesize */ 1306 } 1307 }; 1308 1309 static int 1310 msdosfs_mkdir(ap) 1311 struct vop_mkdir_args /* { 1312 struct vnode *a_dvp; 1313 struvt vnode **a_vpp; 1314 struvt componentname *a_cnp; 1315 struct vattr *a_vap; 1316 } */ *ap; 1317 { 1318 int bn; 1319 int error; 1320 u_long newcluster; 1321 struct denode *pdep; 1322 struct denode *ndep; 1323 struct direntry *denp; 1324 struct denode ndirent; 1325 struct msdosfsmount *pmp; 1326 struct buf *bp; 1327 struct timespec ts; 1328 u_short dDate, dTime; 1329 1330 pdep = VTODE(ap->a_dvp); 1331 1332 /* 1333 * If this is the root directory and there is no space left we 1334 * can't do anything. This is because the root directory can not 1335 * change size. 1336 */ 1337 if (pdep->de_StartCluster == MSDOSFSROOT && pdep->de_fndclust == (u_long)-1) { 1338 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1339 vput(ap->a_dvp); 1340 return ENOSPC; 1341 } 1342 1343 pmp = pdep->de_pmp; 1344 1345 /* 1346 * Allocate a cluster to hold the about to be created directory. 1347 */ 1348 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1349 if (error) { 1350 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1351 vput(ap->a_dvp); 1352 return error; 1353 } 1354 1355 /* 1356 * Now fill the cluster with the "." and ".." entries. And write 1357 * the cluster to disk. This way it is there for the parent 1358 * directory to be pointing at if there were a crash. 1359 */ 1360 bn = cntobn(pmp, newcluster); 1361 /* always succeeds */ 1362 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1363 bzero(bp->b_data, pmp->pm_bpcluster); 1364 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1365 denp = (struct direntry *) bp->b_data; 1366 putushort(denp->deStartCluster, newcluster); 1367 TIMEVAL_TO_TIMESPEC(&time, &ts); 1368 unix2dostime(&ts, &dDate, &dTime); 1369 putushort(denp->deDate, dDate); 1370 putushort(denp->deTime, dTime); 1371 denp++; 1372 putushort(denp->deStartCluster, pdep->de_StartCluster); 1373 putushort(denp->deDate, dDate); 1374 putushort(denp->deTime, dTime); 1375 error = bwrite(bp); 1376 if (error) { 1377 clusterfree(pmp, newcluster, NULL); 1378 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1379 vput(ap->a_dvp); 1380 return error; 1381 } 1382 1383 /* 1384 * Now build up a directory entry pointing to the newly allocated 1385 * cluster. This will be written to an empty slot in the parent 1386 * directory. 1387 */ 1388 ndep = &ndirent; 1389 bzero(ndep, sizeof(*ndep)); 1390 unix2dosfn((u_char *)ap->a_cnp->cn_nameptr, 1391 ndep->de_Name, ap->a_cnp->cn_namelen); 1392 TIMEVAL_TO_TIMESPEC(&time, &ts); 1393 unix2dostime(&ts, &ndep->de_Date, &ndep->de_Time); 1394 ndep->de_StartCluster = newcluster; 1395 ndep->de_Attributes = ATTR_DIRECTORY; 1396 1397 error = createde(ndep, pdep, &ndep); 1398 if (error) { 1399 clusterfree(pmp, newcluster, NULL); 1400 } else { 1401 *ap->a_vpp = DETOV(ndep); 1402 } 1403 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1404 #ifdef MSDOSFS_DEBUG 1405 printf("msdosfs_mkdir(): vput(%08x)\n", ap->a_dvp); 1406 #endif 1407 vput(ap->a_dvp); 1408 return error; 1409 } 1410 1411 static int 1412 msdosfs_rmdir(ap) 1413 struct vop_rmdir_args /* { 1414 struct vnode *a_dvp; 1415 struct vnode *a_vp; 1416 struct componentname *a_cnp; 1417 } */ *ap; 1418 { 1419 struct denode *ddep; 1420 struct denode *dep; 1421 int error = 0; 1422 1423 ddep = VTODE(ap->a_dvp); /* parent dir of dir to delete */ 1424 dep = VTODE(ap->a_vp);/* directory to delete */ 1425 1426 /* 1427 * Be sure the directory being deleted is empty. 1428 */ 1429 if (dosdirempty(dep) == 0) { 1430 error = ENOTEMPTY; 1431 goto out; 1432 } 1433 1434 /* 1435 * Delete the entry from the directory. For dos filesystems this 1436 * gets rid of the directory entry on disk, the in memory copy 1437 * still exists but the de_refcnt is <= 0. This prevents it from 1438 * being found by deget(). When the vput() on dep is done we give 1439 * up access and eventually msdosfs_reclaim() will be called which 1440 * will remove it from the denode cache. 1441 */ 1442 error = removede(ddep,dep); 1443 if (error) 1444 goto out; 1445 1446 /* 1447 * This is where we decrement the link count in the parent 1448 * directory. Since dos filesystems don't do this we just purge 1449 * the name cache and let go of the parent directory denode. 1450 */ 1451 cache_purge(DETOV(ddep)); 1452 vput(ap->a_dvp); 1453 ap->a_dvp = NULL; 1454 1455 /* 1456 * Truncate the directory that is being deleted. 1457 */ 1458 error = detrunc(dep, (u_long) 0, IO_SYNC, NOCRED, NULL); 1459 cache_purge(DETOV(dep)); 1460 1461 out: ; 1462 if (ap->a_dvp) 1463 vput(ap->a_dvp); 1464 vput(ap->a_vp); 1465 return error; 1466 } 1467 1468 /* 1469 * DOS filesystems don't know what symlinks are. 1470 */ 1471 static int 1472 msdosfs_symlink(ap) 1473 struct vop_symlink_args /* { 1474 struct vnode *a_dvp; 1475 struct vnode **a_vpp; 1476 struct componentname *a_cnp; 1477 struct vattr *a_vap; 1478 char *a_target; 1479 } */ *ap; 1480 { 1481 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1482 vput(ap->a_dvp); 1483 return EINVAL; 1484 } 1485 1486 /* 1487 * Dummy dirents to simulate the "." and ".." entries of the root directory 1488 * in a dos filesystem. Dos doesn't provide these. Note that each entry 1489 * must be the same size as a dos directory entry (32 bytes). 1490 */ 1491 static struct dos_dirent { 1492 u_long d_fileno; 1493 u_short d_reclen; 1494 u_char d_type; 1495 u_char d_namlen; 1496 u_char d_name[24]; 1497 } rootdots[2] = { 1498 1499 { 1500 1, /* d_fileno */ 1501 sizeof(struct direntry), /* d_reclen */ 1502 DT_DIR, /* d_type */ 1503 1, /* d_namlen */ 1504 "." /* d_name */ 1505 }, 1506 { 1507 1, /* d_fileno */ 1508 sizeof(struct direntry), /* d_reclen */ 1509 DT_DIR, /* d_type */ 1510 2, /* d_namlen */ 1511 ".." /* d_name */ 1512 } 1513 }; 1514 1515 static int 1516 msdosfs_readdir(ap) 1517 struct vop_readdir_args /* { 1518 struct vnode *a_vp; 1519 struct uio *a_uio; 1520 struct ucred *a_cred; 1521 int *a_eofflag; 1522 int *a_ncookies; 1523 u_long **a_cookies; 1524 } */ *ap; 1525 { 1526 int error = 0; 1527 int diff; 1528 char pushout; 1529 long n; 1530 long on; 1531 long lost; 1532 long count; 1533 u_long cn; 1534 u_long fileno; 1535 long bias = 0; 1536 daddr_t bn; 1537 daddr_t lbn; 1538 struct buf *bp; 1539 struct denode *dep = VTODE(ap->a_vp); 1540 struct msdosfsmount *pmp = dep->de_pmp; 1541 struct direntry *dentp; 1542 struct dirent *prev; 1543 struct dirent *crnt; 1544 u_char dirbuf[512]; /* holds converted dos directories */ 1545 struct uio *uio = ap->a_uio; 1546 off_t off; 1547 int ncookies = 0; 1548 1549 #ifdef MSDOSFS_DEBUG 1550 printf("msdosfs_readdir(): vp %08x, uio %08x, cred %08x, eofflagp %08x\n", 1551 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1552 #endif 1553 1554 /* 1555 * msdosfs_readdir() won't operate properly on regular files since 1556 * it does i/o only with the the filesystem vnode, and hence can 1557 * retrieve the wrong block from the buffer cache for a plain file. 1558 * So, fail attempts to readdir() on a plain file. 1559 */ 1560 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1561 return ENOTDIR; 1562 1563 /* 1564 * If the user buffer is smaller than the size of one dos directory 1565 * entry or the file offset is not a multiple of the size of a 1566 * directory entry, then we fail the read. 1567 */ 1568 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1569 lost = uio->uio_resid - count; 1570 if (count < sizeof(struct direntry) || 1571 (uio->uio_offset & (sizeof(struct direntry) - 1))) 1572 return EINVAL; 1573 uio->uio_resid = count; 1574 uio->uio_iov->iov_len = count; 1575 off = uio->uio_offset; 1576 1577 /* 1578 * If they are reading from the root directory then, we simulate 1579 * the . and .. entries since these don't exist in the root 1580 * directory. We also set the offset bias to make up for having to 1581 * simulate these entries. By this I mean that at file offset 64 we 1582 * read the first entry in the root directory that lives on disk. 1583 */ 1584 if (dep->de_StartCluster == MSDOSFSROOT) { 1585 /* 1586 * printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1587 * uio->uio_offset); 1588 */ 1589 bias = 2 * sizeof(struct direntry); 1590 if (uio->uio_offset < 2 * sizeof(struct direntry)) { 1591 if (uio->uio_offset 1592 && uio->uio_offset != sizeof(struct direntry)) { 1593 error = EINVAL; 1594 goto out; 1595 } 1596 n = 1; 1597 if (!uio->uio_offset) { 1598 n = 2; 1599 ncookies++; 1600 } 1601 ncookies++; 1602 error = uiomove((char *) rootdots + uio->uio_offset, 1603 n * sizeof(struct direntry), uio); 1604 } 1605 } 1606 while (!error && uio->uio_resid > 0) { 1607 lbn = (uio->uio_offset - bias) >> pmp->pm_cnshift; 1608 on = (uio->uio_offset - bias) & pmp->pm_crbomask; 1609 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 1610 diff = dep->de_FileSize - (uio->uio_offset - bias); 1611 if (diff <= 0) 1612 break; 1613 if (diff < n) 1614 n = diff; 1615 error = pcbmap(dep, lbn, &bn, &cn); 1616 if (error) 1617 break; 1618 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, NOCRED, &bp); 1619 n = min(n, pmp->pm_bpcluster - bp->b_resid); 1620 if (error) { 1621 brelse(bp); 1622 return error; 1623 } 1624 1625 /* 1626 * code to convert from dos directory entries to ufs 1627 * directory entries 1628 */ 1629 pushout = 0; 1630 dentp = (struct direntry *)(bp->b_data + on); 1631 prev = 0; 1632 crnt = (struct dirent *) dirbuf; 1633 while ((char *) dentp < bp->b_data + on + n) { 1634 /* 1635 * printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1636 * dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1637 */ 1638 /* 1639 * If we have an empty entry or a slot from a 1640 * deleted file, or a volume label entry just 1641 * concatenate its space onto the end of the 1642 * previous entry or, manufacture an empty entry if 1643 * there is no previous entry. 1644 */ 1645 if (dentp->deName[0] == SLOT_EMPTY || 1646 dentp->deName[0] == SLOT_DELETED || 1647 (dentp->deAttributes & ATTR_VOLUME)) { 1648 if (prev) { 1649 prev->d_reclen += sizeof(struct direntry); 1650 } else { 1651 prev = crnt; 1652 prev->d_fileno = 0; 1653 prev->d_reclen = sizeof(struct direntry); 1654 prev->d_type = DT_UNKNOWN; 1655 prev->d_namlen = 0; 1656 prev->d_name[0] = 0; 1657 ncookies++; 1658 } 1659 } else { 1660 /* 1661 * this computation of d_fileno must match 1662 * the computation of va_fileid in 1663 * msdosfs_getattr 1664 */ 1665 if (dentp->deAttributes & ATTR_DIRECTORY) { 1666 /* if this is the root directory */ 1667 fileno = getushort(dentp->deStartCluster); 1668 if (fileno == MSDOSFSROOT) 1669 fileno = 1; 1670 } else { 1671 /* 1672 * if the file's dirent lives in 1673 * root dir 1674 */ 1675 if ((fileno = cn) == MSDOSFSROOT) 1676 fileno = 1; 1677 fileno = (fileno << 16) | 1678 ((dentp - (struct direntry *) bp->b_data) & 0xffff); 1679 } 1680 crnt->d_fileno = fileno; 1681 crnt->d_reclen = sizeof(struct direntry); 1682 crnt->d_type = (dentp->deAttributes & ATTR_DIRECTORY) 1683 ? DT_DIR : DT_REG; 1684 crnt->d_namlen = dos2unixfn(dentp->deName, 1685 (u_char *)crnt->d_name); 1686 /* 1687 * printf("readdir: file %s, fileno %08x, attr %02x, start %08x\n", 1688 * crnt->d_name, crnt->d_fileno, dentp->deAttributes, 1689 * dentp->deStartCluster); 1690 */ 1691 prev = crnt; 1692 ncookies++; 1693 } 1694 dentp++; 1695 1696 crnt = (struct dirent *) ((char *) crnt + sizeof(struct direntry)); 1697 pushout = 1; 1698 1699 /* 1700 * If our intermediate buffer is full then copy its 1701 * contents to user space. I would just use the 1702 * buffer the buf header points to but, I'm afraid 1703 * that when we brelse() it someone else might find 1704 * it in the cache and think its contents are 1705 * valid. Maybe there is a way to invalidate the 1706 * buffer before brelse()'ing it. 1707 */ 1708 if ((u_char *) crnt >= &dirbuf[sizeof dirbuf]) { 1709 pushout = 0; 1710 error = uiomove(dirbuf, sizeof(dirbuf), uio); 1711 if (error) 1712 break; 1713 prev = 0; 1714 crnt = (struct dirent *) dirbuf; 1715 } 1716 } 1717 if (pushout) { 1718 pushout = 0; 1719 error = uiomove(dirbuf, (char *) crnt - (char *) dirbuf, 1720 uio); 1721 } 1722 1723 #if 0 1724 /* 1725 * If we have read everything from this block or have read 1726 * to end of file then we are done with this block. Mark 1727 * it to say the buffer can be reused if need be. 1728 */ 1729 if (n + on == pmp->pm_bpcluster || 1730 (uio->uio_offset - bias) == dep->de_FileSize) 1731 bp->b_flags |= B_AGE; 1732 #endif /* if 0 */ 1733 brelse(bp); 1734 if (n == 0) 1735 break; 1736 } 1737 out: ; 1738 uio->uio_resid += lost; 1739 if (!error && ap->a_ncookies != NULL) { 1740 struct dirent* dpStart; 1741 struct dirent* dpEnd; 1742 struct dirent* dp; 1743 u_long *cookies; 1744 u_long *cookiep; 1745 1746 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1747 panic("msdosfs_readdir: unexpected uio from NFS server"); 1748 dpStart = (struct dirent *) 1749 (uio->uio_iov->iov_base - (uio->uio_offset - off)); 1750 dpEnd = (struct dirent *) uio->uio_iov->iov_base; 1751 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 1752 for (dp = dpStart, cookiep = cookies; 1753 dp < dpEnd; 1754 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 1755 off += dp->d_reclen; 1756 *cookiep++ = (u_long) off; 1757 } 1758 *ap->a_ncookies = ncookies; 1759 *ap->a_cookies = cookies; 1760 } 1761 1762 /* 1763 * Set the eofflag (NFS uses it) 1764 */ 1765 if (ap->a_eofflag) 1766 if (dep->de_FileSize - (uio->uio_offset - bias) <= 0) 1767 *ap->a_eofflag = 1; 1768 else 1769 *ap->a_eofflag = 0; 1770 1771 return error; 1772 } 1773 1774 /* 1775 * DOS filesystems don't know what symlinks are. 1776 */ 1777 static int 1778 msdosfs_readlink(ap) 1779 struct vop_readlink_args /* { 1780 struct vnode *a_vp; 1781 struct uio *a_uio; 1782 struct ucred *a_cred; 1783 } */ *ap; 1784 { 1785 return EINVAL; 1786 } 1787 1788 static int 1789 msdosfs_abortop(ap) 1790 struct vop_abortop_args /* { 1791 struct vnode *a_dvp; 1792 struct componentname *a_cnp; 1793 } */ *ap; 1794 { 1795 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1796 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 1797 return 0; 1798 } 1799 1800 static int 1801 msdosfs_lock(ap) 1802 struct vop_lock_args /* { 1803 struct vnode *a_vp; 1804 int a_flags; 1805 struct proc *a_p; 1806 } */ *ap; 1807 { 1808 struct vnode *vp = ap->a_vp; 1809 1810 return (lockmgr(&VTODE(vp)->de_lock, ap->a_flags, &vp->v_interlock, 1811 ap->a_p)); 1812 } 1813 1814 int 1815 msdosfs_unlock(ap) 1816 struct vop_unlock_args /* { 1817 struct vnode *a_vp; 1818 int a_flags; 1819 struct proc *a_p; 1820 } */ *ap; 1821 { 1822 struct vnode *vp = ap->a_vp; 1823 1824 return (lockmgr(&VTODE(vp)->de_lock, ap->a_flags | LK_RELEASE, 1825 &vp->v_interlock, ap->a_p)); 1826 } 1827 1828 int 1829 msdosfs_islocked(ap) 1830 struct vop_islocked_args /* { 1831 struct vnode *a_vp; 1832 } */ *ap; 1833 { 1834 1835 return (lockstatus(&VTODE(ap->a_vp)->de_lock)); 1836 } 1837 1838 /* 1839 * vp - address of vnode file the file 1840 * bn - which cluster we are interested in mapping to a filesystem block number. 1841 * vpp - returns the vnode for the block special file holding the filesystem 1842 * containing the file of interest 1843 * bnp - address of where to return the filesystem relative block number 1844 */ 1845 static int 1846 msdosfs_bmap(ap) 1847 struct vop_bmap_args /* { 1848 struct vnode *a_vp; 1849 daddr_t a_bn; 1850 struct vnode **a_vpp; 1851 daddr_t *a_bnp; 1852 int *a_runp; 1853 int *a_runb; 1854 } */ *ap; 1855 { 1856 struct denode *dep = VTODE(ap->a_vp); 1857 1858 if (ap->a_vpp != NULL) 1859 *ap->a_vpp = dep->de_devvp; 1860 if (ap->a_bnp == NULL) 1861 return 0; 1862 if (ap->a_runp) { 1863 /* 1864 * Sequential clusters should be counted here. 1865 */ 1866 *ap->a_runp = 0; 1867 } 1868 if (ap->a_runb) { 1869 *ap->a_runb = 0; 1870 } 1871 return pcbmap(dep, ap->a_bn, ap->a_bnp, 0); 1872 } 1873 1874 static int 1875 msdosfs_reallocblks(ap) 1876 struct vop_reallocblks_args /* { 1877 struct vnode *a_vp; 1878 struct cluster_save *a_buflist; 1879 } */ *ap; 1880 { 1881 /* Currently no support for clustering */ /* XXX */ 1882 return ENOSPC; 1883 } 1884 1885 static int 1886 msdosfs_strategy(ap) 1887 struct vop_strategy_args /* { 1888 struct buf *a_bp; 1889 } */ *ap; 1890 { 1891 struct buf *bp = ap->a_bp; 1892 struct denode *dep = VTODE(bp->b_vp); 1893 struct vnode *vp; 1894 int error = 0; 1895 1896 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1897 panic("msdosfs_strategy: spec"); 1898 /* 1899 * If we don't already know the filesystem relative block number 1900 * then get it using pcbmap(). If pcbmap() returns the block 1901 * number as -1 then we've got a hole in the file. DOS filesystems 1902 * don't allow files with holes, so we shouldn't ever see this. 1903 */ 1904 if (bp->b_blkno == bp->b_lblkno) { 1905 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0); 1906 if (error) 1907 bp->b_blkno = -1; 1908 if (bp->b_blkno == -1) 1909 clrbuf(bp); 1910 } 1911 if (bp->b_blkno == -1) { 1912 biodone(bp); 1913 return error; 1914 } 1915 #ifdef DIAGNOSTIC 1916 #endif 1917 /* 1918 * Read/write the block from/to the disk that contains the desired 1919 * file block. 1920 */ 1921 vp = dep->de_devvp; 1922 bp->b_dev = vp->v_rdev; 1923 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1924 return 0; 1925 } 1926 1927 static int 1928 msdosfs_print(ap) 1929 struct vop_print_args /* { 1930 struct vnode *vp; 1931 } */ *ap; 1932 { 1933 struct denode *dep = VTODE(ap->a_vp); 1934 1935 printf( 1936 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1937 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1938 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1939 lockmgr_printinfo(&dep->de_lock); 1940 printf("\n"); 1941 return 0; 1942 } 1943 1944 static int 1945 msdosfs_advlock(ap) 1946 struct vop_advlock_args /* { 1947 struct vnode *a_vp; 1948 caddr_t a_id; 1949 int a_op; 1950 struct flock *a_fl; 1951 int a_flags; 1952 } */ *ap; 1953 { 1954 return EINVAL; /* we don't do locking yet */ 1955 } 1956 1957 static int 1958 msdosfs_pathconf(ap) 1959 struct vop_pathconf_args /* { 1960 struct vnode *a_vp; 1961 int a_name; 1962 int *a_retval; 1963 } */ *ap; 1964 { 1965 switch (ap->a_name) { 1966 case _PC_LINK_MAX: 1967 *ap->a_retval = 1; 1968 return 0; 1969 case _PC_NAME_MAX: 1970 *ap->a_retval = 12; 1971 return 0; 1972 case _PC_PATH_MAX: 1973 *ap->a_retval = PATH_MAX; /* 255? */ 1974 return 0; 1975 case _PC_CHOWN_RESTRICTED: 1976 *ap->a_retval = 1; 1977 return 0; 1978 case _PC_NO_TRUNC: 1979 *ap->a_retval = 0; 1980 return 0; 1981 default: 1982 return EINVAL; 1983 } 1984 } 1985 1986 /* Global vfs data structures for msdosfs */ 1987 vop_t **msdosfs_vnodeop_p; 1988 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1989 { &vop_default_desc, (vop_t *)vn_default_error }, 1990 { &vop_lookup_desc, (vop_t *)msdosfs_lookup }, /* lookup */ 1991 { &vop_create_desc, (vop_t *)msdosfs_create }, /* create */ 1992 { &vop_mknod_desc, (vop_t *)msdosfs_mknod }, /* mknod */ 1993 { &vop_open_desc, (vop_t *)msdosfs_open }, /* open */ 1994 { &vop_close_desc, (vop_t *)msdosfs_close }, /* close */ 1995 { &vop_access_desc, (vop_t *)msdosfs_access }, /* access */ 1996 { &vop_getattr_desc, (vop_t *)msdosfs_getattr }, /* getattr */ 1997 { &vop_setattr_desc, (vop_t *)msdosfs_setattr }, /* setattr */ 1998 { &vop_read_desc, (vop_t *)msdosfs_read }, /* read */ 1999 { &vop_write_desc, (vop_t *)msdosfs_write }, /* write */ 2000 { &vop_ioctl_desc, (vop_t *)msdosfs_ioctl }, /* ioctl */ 2001 { &vop_select_desc, (vop_t *)msdosfs_select }, /* select */ 2002 { &vop_mmap_desc, (vop_t *)msdosfs_mmap }, /* mmap */ 2003 { &vop_fsync_desc, (vop_t *)msdosfs_fsync }, /* fsync */ 2004 { &vop_seek_desc, (vop_t *)msdosfs_seek }, /* seek */ 2005 { &vop_remove_desc, (vop_t *)msdosfs_remove }, /* remove */ 2006 { &vop_link_desc, (vop_t *)msdosfs_link }, /* link */ 2007 { &vop_rename_desc, (vop_t *)msdosfs_rename }, /* rename */ 2008 { &vop_mkdir_desc, (vop_t *)msdosfs_mkdir }, /* mkdir */ 2009 { &vop_rmdir_desc, (vop_t *)msdosfs_rmdir }, /* rmdir */ 2010 { &vop_symlink_desc, (vop_t *)msdosfs_symlink }, /* symlink */ 2011 { &vop_readdir_desc, (vop_t *)msdosfs_readdir }, /* readdir */ 2012 { &vop_readlink_desc, (vop_t *)msdosfs_readlink }, /* readlink */ 2013 { &vop_abortop_desc, (vop_t *)msdosfs_abortop }, /* abortop */ 2014 { &vop_inactive_desc, (vop_t *)msdosfs_inactive }, /* inactive */ 2015 { &vop_reclaim_desc, (vop_t *)msdosfs_reclaim }, /* reclaim */ 2016 { &vop_lock_desc, (vop_t *)msdosfs_lock }, /* lock */ 2017 { &vop_unlock_desc, (vop_t *)msdosfs_unlock }, /* unlock */ 2018 { &vop_bmap_desc, (vop_t *)msdosfs_bmap }, /* bmap */ 2019 { &vop_strategy_desc, (vop_t *)msdosfs_strategy }, /* strategy */ 2020 { &vop_print_desc, (vop_t *)msdosfs_print }, /* print */ 2021 { &vop_islocked_desc, (vop_t *)msdosfs_islocked }, /* islocked */ 2022 { &vop_pathconf_desc, (vop_t *)msdosfs_pathconf }, /* pathconf */ 2023 { &vop_advlock_desc, (vop_t *)msdosfs_advlock }, /* advlock */ 2024 { &vop_reallocblks_desc, (vop_t *)msdosfs_reallocblks }, /* reallocblks */ 2025 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 2026 { NULL, NULL } 2027 }; 2028 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 2029 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 2030 2031 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 2032