1 /* $Id: msdosfs_vnops.c,v 1.31 1996/06/14 11:01:41 asami 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 if (vp->v_usecount > 1 && !(dep->de_flag & DE_LOCKED)) 242 DE_TIMES(dep, &time); 243 return 0; 244 } 245 246 static int 247 msdosfs_access(ap) 248 struct vop_access_args /* { 249 struct vnode *a_vp; 250 int a_mode; 251 struct ucred *a_cred; 252 struct proc *a_p; 253 } */ *ap; 254 { 255 struct vnode *vp = ap->a_vp; 256 struct denode *dep = VTODE(ap->a_vp); 257 struct msdosfsmount *pmp = dep->de_pmp; 258 struct ucred *cred = ap->a_cred; 259 mode_t mask, file_mode, mode = ap->a_mode; 260 register gid_t *gp; 261 int i; 262 263 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 264 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 265 file_mode &= pmp->pm_mask; 266 267 /* 268 * Disallow write attempts on read-only file systems; 269 * unless the file is a socket, fifo, or a block or 270 * character device resident on the file system. 271 */ 272 if (mode & VWRITE) { 273 switch (vp->v_type) { 274 case VDIR: 275 case VLNK: 276 case VREG: 277 if (vp->v_mount->mnt_flag & MNT_RDONLY) 278 return (EROFS); 279 break; 280 } 281 } 282 283 /* User id 0 always gets access. */ 284 if (cred->cr_uid == 0) 285 return 0; 286 287 mask = 0; 288 289 /* Otherwise, check the owner. */ 290 if (cred->cr_uid == pmp->pm_uid) { 291 if (mode & VEXEC) 292 mask |= S_IXUSR; 293 if (mode & VREAD) 294 mask |= S_IRUSR; 295 if (mode & VWRITE) 296 mask |= S_IWUSR; 297 return (file_mode & mask) == mask ? 0 : EACCES; 298 } 299 300 /* Otherwise, check the groups. */ 301 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 302 if (pmp->pm_gid == *gp) { 303 if (mode & VEXEC) 304 mask |= S_IXGRP; 305 if (mode & VREAD) 306 mask |= S_IRGRP; 307 if (mode & VWRITE) 308 mask |= S_IWGRP; 309 return (file_mode & mask) == mask ? 0 : EACCES; 310 } 311 312 /* Otherwise, check everyone else. */ 313 if (mode & VEXEC) 314 mask |= S_IXOTH; 315 if (mode & VREAD) 316 mask |= S_IROTH; 317 if (mode & VWRITE) 318 mask |= S_IWOTH; 319 return (file_mode & mask) == mask ? 0 : EACCES; 320 } 321 322 static int 323 msdosfs_getattr(ap) 324 struct vop_getattr_args /* { 325 struct vnode *a_vp; 326 struct vattr *a_vap; 327 struct ucred *a_cred; 328 struct proc *a_p; 329 } */ *ap; 330 { 331 u_int cn; 332 struct denode *dep = VTODE(ap->a_vp); 333 struct vattr *vap = ap->a_vap; 334 335 DE_TIMES(dep, &time); 336 vap->va_fsid = dep->de_dev; 337 /* 338 * The following computation of the fileid must be the same as that 339 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 340 * doesn't work. 341 */ 342 if (dep->de_Attributes & ATTR_DIRECTORY) { 343 if ((cn = dep->de_StartCluster) == MSDOSFSROOT) 344 cn = 1; 345 } else { 346 if ((cn = dep->de_dirclust) == MSDOSFSROOT) 347 cn = 1; 348 cn = (cn << 16) | (dep->de_diroffset & 0xffff); 349 } 350 vap->va_fileid = cn; 351 vap->va_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 352 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 353 vap->va_mode &= dep->de_pmp->pm_mask; 354 if (dep->de_Attributes & ATTR_DIRECTORY) 355 vap->va_mode |= S_IFDIR; 356 vap->va_nlink = 1; 357 vap->va_gid = dep->de_pmp->pm_gid; 358 vap->va_uid = dep->de_pmp->pm_uid; 359 vap->va_rdev = 0; 360 vap->va_size = dep->de_FileSize; 361 dos2unixtime(dep->de_Date, dep->de_Time, &vap->va_atime); 362 vap->va_mtime = vap->va_atime; 363 #if 0 364 #ifndef MSDOSFS_NODIRMOD 365 if (vap->va_mode & S_IFDIR) 366 TIMEVAL_TO_TIMESPEC(&time, &vap->va_mtime); 367 #endif 368 #endif 369 vap->va_ctime = vap->va_atime; 370 vap->va_flags = (dep->de_Attributes & ATTR_ARCHIVE) ? 0 : SF_ARCHIVED; 371 vap->va_gen = 0; 372 vap->va_blocksize = dep->de_pmp->pm_bpcluster; 373 vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) & 374 ~(dep->de_pmp->pm_crbomask); 375 vap->va_type = ap->a_vp->v_type; 376 vap->va_filerev = dep->de_modrev; 377 return 0; 378 } 379 380 static int 381 msdosfs_setattr(ap) 382 struct vop_setattr_args /* { 383 struct vnode *a_vp; 384 struct vattr *a_vap; 385 struct ucred *a_cred; 386 struct proc *a_p; 387 } */ *ap; 388 { 389 struct vnode *vp = ap->a_vp; 390 struct denode *dep = VTODE(ap->a_vp); 391 struct vattr *vap = ap->a_vap; 392 struct ucred *cred = ap->a_cred; 393 int error = 0; 394 395 /* 396 * Check for unsettable attributes. 397 */ 398 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 399 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 400 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 401 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 402 return (EINVAL); 403 } 404 if (vap->va_flags != VNOVAL) { 405 if (vp->v_mount->mnt_flag & MNT_RDONLY) 406 return (EROFS); 407 if (cred->cr_uid != dep->de_pmp->pm_uid && 408 (error = suser(cred, &ap->a_p->p_acflag))) 409 return (error); 410 /* 411 * We are very inconsistent about handling unsupported 412 * attributes. We ignored the the access time and the 413 * read and execute bits. We were strict for the other 414 * attributes. 415 * 416 * Here we are strict, stricter than ufs in not allowing 417 * users to attempt to set SF_SETTABLE bits or anyone to 418 * set unsupported bits. However, we ignore attempts to 419 * set ATTR_ARCHIVE for directories `cp -pr' from a more 420 * sensible file system attempts it a lot. 421 */ 422 if (cred->cr_uid != 0) { 423 if (vap->va_flags & SF_SETTABLE) 424 return EPERM; 425 } 426 if (vap->va_flags & ~SF_ARCHIVED) 427 return EINVAL; 428 if (vap->va_flags & SF_ARCHIVED) 429 dep->de_Attributes &= ~ATTR_ARCHIVE; 430 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 431 dep->de_Attributes |= ATTR_ARCHIVE; 432 dep->de_flag |= DE_MODIFIED; 433 } 434 435 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 436 if (vp->v_mount->mnt_flag & MNT_RDONLY) 437 return (EROFS); 438 if ((cred->cr_uid != dep->de_pmp->pm_uid || 439 vap->va_uid != dep->de_pmp->pm_uid || 440 (vap->va_gid != dep->de_pmp->pm_gid && 441 !groupmember(vap->va_gid, cred))) && 442 (error = suser(cred, &ap->a_p->p_acflag))) 443 return error; 444 if (vap->va_uid != dep->de_pmp->pm_uid || 445 vap->va_gid != dep->de_pmp->pm_gid) 446 return EINVAL; 447 } 448 if (vap->va_size != VNOVAL) { 449 /* 450 * Disallow write attempts on read-only file systems; 451 * unless the file is a socket, fifo, or a block or 452 * character device resident on the file system. 453 */ 454 switch (vp->v_type) { 455 case VDIR: 456 return (EISDIR); 457 case VLNK: 458 case VREG: 459 if (vp->v_mount->mnt_flag & MNT_RDONLY) 460 return (EROFS); 461 break; 462 } 463 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 464 if (error) 465 return error; 466 } 467 if (vap->va_mtime.ts_sec != VNOVAL) { 468 if (vp->v_mount->mnt_flag & MNT_RDONLY) 469 return (EROFS); 470 if (cred->cr_uid != dep->de_pmp->pm_uid && 471 (error = suser(cred, &ap->a_p->p_acflag)) && 472 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 473 (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_p)))) 474 return error; 475 dep->de_flag |= DE_UPDATE; 476 error = deupdat(dep, &vap->va_mtime, 1); 477 if (error) 478 return error; 479 } 480 481 /* 482 * DOS files only have the ability to have their writability 483 * attribute set, so we use the owner write bit to set the readonly 484 * attribute. 485 */ 486 error = 0; 487 if (vap->va_mode != (u_short) VNOVAL) { 488 if (vp->v_mount->mnt_flag & MNT_RDONLY) 489 return (EROFS); 490 if (cred->cr_uid != dep->de_pmp->pm_uid && 491 (error = suser(cred, &ap->a_p->p_acflag))) 492 return error; 493 494 /* We ignore the read and execute bits */ 495 if (vap->va_mode & VWRITE) 496 dep->de_Attributes &= ~ATTR_READONLY; 497 else 498 dep->de_Attributes |= ATTR_READONLY; 499 dep->de_flag |= DE_MODIFIED; 500 } 501 return error; 502 } 503 504 static int 505 msdosfs_read(ap) 506 struct vop_read_args /* { 507 struct vnode *a_vp; 508 struct uio *a_uio; 509 int a_ioflag; 510 struct ucred *a_cred; 511 } */ *ap; 512 { 513 int error = 0; 514 int diff; 515 int isadir; 516 long n; 517 long on; 518 daddr_t lbn; 519 daddr_t rablock; 520 int rasize; 521 struct buf *bp; 522 struct vnode *vp = ap->a_vp; 523 struct denode *dep = VTODE(vp); 524 struct msdosfsmount *pmp = dep->de_pmp; 525 struct uio *uio = ap->a_uio; 526 527 /* 528 * If they didn't ask for any data, then we are done. 529 */ 530 if (uio->uio_resid == 0) 531 return 0; 532 if (uio->uio_offset < 0) 533 return EINVAL; 534 535 isadir = dep->de_Attributes & ATTR_DIRECTORY; 536 do { 537 lbn = uio->uio_offset >> pmp->pm_cnshift; 538 on = uio->uio_offset & pmp->pm_crbomask; 539 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 540 diff = dep->de_FileSize - uio->uio_offset; 541 if (diff <= 0) 542 return 0; 543 /* convert cluster # to block # if a directory */ 544 if (isadir) { 545 error = pcbmap(dep, lbn, &lbn, 0); 546 if (error) 547 return error; 548 } 549 if (diff < n) 550 n = diff; 551 /* 552 * If we are operating on a directory file then be sure to 553 * do i/o with the vnode for the filesystem instead of the 554 * vnode for the directory. 555 */ 556 if (isadir) { 557 error = bread(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 558 NOCRED, &bp); 559 } else { 560 rablock = lbn + 1; 561 #ifdef PC98 562 /* 563 * 1024byte/sector support 564 */ 565 if (pmp->pm_BytesPerSec == 1024) 566 vp->v_flag |= 0x10000; 567 #endif 568 if (vp->v_lastr + 1 == lbn && 569 rablock * pmp->pm_bpcluster < dep->de_FileSize) { 570 rasize = pmp->pm_bpcluster; 571 error = breadn(vp, lbn, pmp->pm_bpcluster, 572 &rablock, &rasize, 1, 573 NOCRED, &bp); 574 } else { 575 error = bread(vp, lbn, pmp->pm_bpcluster, NOCRED, 576 &bp); 577 } 578 vp->v_lastr = lbn; 579 } 580 n = min(n, pmp->pm_bpcluster - bp->b_resid); 581 if (error) { 582 brelse(bp); 583 return error; 584 } 585 error = uiomove(bp->b_data + on, (int) n, uio); 586 /* 587 * If we have read everything from this block or have read 588 * to end of file then we are done with this block. Mark 589 * it to say the buffer can be reused if need be. 590 */ 591 #if 0 592 if (n + on == pmp->pm_bpcluster || 593 uio->uio_offset == dep->de_FileSize) 594 bp->b_flags |= B_AGE; 595 #endif 596 brelse(bp); 597 } while (error == 0 && uio->uio_resid > 0 && n != 0); 598 return error; 599 } 600 601 /* 602 * Write data to a file or directory. 603 */ 604 static int 605 msdosfs_write(ap) 606 struct vop_write_args /* { 607 struct vnode *a_vp; 608 struct uio *a_uio; 609 int a_ioflag; 610 struct ucred *a_cred; 611 } */ *ap; 612 { 613 int n; 614 int isadir; 615 int croffset; 616 int resid; 617 int osize; 618 int error = 0; 619 u_long count; 620 daddr_t bn, lastcn; 621 struct buf *bp; 622 int ioflag = ap->a_ioflag; 623 struct uio *uio = ap->a_uio; 624 struct proc *p = uio->uio_procp; 625 struct vnode *vp = ap->a_vp; 626 struct vnode *thisvp; 627 struct denode *dep = VTODE(vp); 628 struct msdosfsmount *pmp = dep->de_pmp; 629 struct ucred *cred = ap->a_cred; 630 struct timespec ts; 631 632 #ifdef MSDOSFS_DEBUG 633 printf("msdosfs_write(vp %08x, uio %08x, ioflag %08x, cred %08x\n", 634 vp, uio, ioflag, cred); 635 printf("msdosfs_write(): diroff %d, dirclust %d, startcluster %d\n", 636 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 637 #endif 638 639 switch (vp->v_type) { 640 case VREG: 641 if (ioflag & IO_APPEND) 642 uio->uio_offset = dep->de_FileSize; 643 isadir = 0; 644 thisvp = vp; 645 break; 646 647 case VDIR: 648 if ((ioflag & IO_SYNC) == 0) 649 panic("msdosfs_write(): non-sync directory update"); 650 isadir = 1; 651 thisvp = pmp->pm_devvp; 652 break; 653 654 default: 655 panic("msdosfs_write(): bad file type"); 656 break; 657 } 658 659 if (uio->uio_offset < 0) 660 return EINVAL; 661 662 if (uio->uio_resid == 0) 663 return 0; 664 665 /* 666 * If they've exceeded their filesize limit, tell them about it. 667 */ 668 if (vp->v_type == VREG && p && 669 ((uio->uio_offset + uio->uio_resid) > 670 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 671 psignal(p, SIGXFSZ); 672 return EFBIG; 673 } 674 675 /* 676 * If attempting to write beyond the end of the root directory we 677 * stop that here because the root directory can not grow. 678 */ 679 if ((dep->de_Attributes & ATTR_DIRECTORY) && 680 dep->de_StartCluster == MSDOSFSROOT && 681 (uio->uio_offset + uio->uio_resid) > dep->de_FileSize) 682 return ENOSPC; 683 684 /* 685 * If the offset we are starting the write at is beyond the end of 686 * the file, then they've done a seek. Unix filesystems allow 687 * files with holes in them, DOS doesn't so we must fill the hole 688 * with zeroed blocks. 689 */ 690 if (uio->uio_offset > dep->de_FileSize) { 691 error = deextend(dep, uio->uio_offset, cred); 692 if (error) 693 return error; 694 } 695 696 /* 697 * Remember some values in case the write fails. 698 */ 699 resid = uio->uio_resid; 700 osize = dep->de_FileSize; 701 702 703 #ifdef PC98 704 /* 705 * 1024byte/sector support 706 */ 707 if (pmp->pm_BytesPerSec == 1024) 708 thisvp->v_flag |= 0x10000; 709 #endif 710 /* 711 * If we write beyond the end of the file, extend it to its ultimate 712 * size ahead of the time to hopefully get a contiguous area. 713 */ 714 if (uio->uio_offset + resid > osize) { 715 count = de_clcount(pmp, uio->uio_offset + resid) - de_clcount(pmp, osize); 716 if ((error = extendfile(dep, count, NULL, NULL, 0)) 717 && (error != ENOSPC || (ioflag & IO_UNIT))) 718 goto errexit; 719 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 720 } else 721 lastcn = de_clcount(pmp, osize) - 1; 722 723 do { 724 bn = de_blk(pmp, uio->uio_offset); 725 if (isadir) { 726 error = pcbmap(dep, bn, &bn, 0); 727 if (error) 728 break; 729 } else if (bn > lastcn) { 730 error = ENOSPC; 731 break; 732 } 733 734 if ((uio->uio_offset & pmp->pm_crbomask) == 0 735 && (de_blk(pmp, uio->uio_offset + uio->uio_resid) > de_blk(pmp, uio->uio_offset) 736 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 737 /* 738 * If either the whole cluster gets written, 739 * or we write the cluster from its start beyond EOF, 740 * then no need to read data from disk. 741 */ 742 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 743 clrbuf(bp); 744 /* 745 * Do the bmap now, since pcbmap needs buffers 746 * for the fat table. (see msdosfs_strategy) 747 */ 748 if (!isadir) { 749 if (bp->b_blkno == bp->b_lblkno) { 750 error = pcbmap(dep, bp->b_lblkno, 751 &bp->b_blkno, 0); 752 if (error) 753 bp->b_blkno = -1; 754 } 755 if (bp->b_blkno == -1) { 756 brelse(bp); 757 if (!error) 758 error = EIO; /* XXX */ 759 break; 760 } 761 } 762 } else { 763 /* 764 * The block we need to write into exists, so read it in. 765 */ 766 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 767 if (error) 768 break; 769 } 770 771 croffset = uio->uio_offset & pmp->pm_crbomask; 772 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 773 if (uio->uio_offset + n > dep->de_FileSize) { 774 dep->de_FileSize = uio->uio_offset + n; 775 vnode_pager_setsize(vp, dep->de_FileSize); /* why? */ 776 } 777 /* 778 * Should these vnode_pager_* functions be done on dir 779 * files? 780 */ 781 782 /* 783 * Copy the data from user space into the buf header. 784 */ 785 error = uiomove(bp->b_data + croffset, n, uio); 786 787 /* 788 * If they want this synchronous then write it and wait for 789 * it. Otherwise, if on a cluster boundary write it 790 * asynchronously so we can move on to the next block 791 * without delay. Otherwise do a delayed write because we 792 * may want to write somemore into the block later. 793 */ 794 if (ioflag & IO_SYNC) 795 (void) bwrite(bp); 796 else if (n + croffset == pmp->pm_bpcluster) { 797 bawrite(bp); 798 } else 799 bdwrite(bp); 800 dep->de_flag |= DE_UPDATE; 801 } while (error == 0 && uio->uio_resid > 0); 802 803 /* 804 * If the write failed and they want us to, truncate the file back 805 * to the size it was before the write was attempted. 806 */ 807 errexit: 808 if (error) { 809 if (ioflag & IO_UNIT) { 810 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 811 uio->uio_offset -= resid - uio->uio_resid; 812 uio->uio_resid = resid; 813 } else { 814 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 815 if (uio->uio_resid != resid) 816 error = 0; 817 } 818 } else { 819 TIMEVAL_TO_TIMESPEC(&time, &ts); 820 error = deupdat(dep, &ts, 1); 821 } 822 return error; 823 } 824 825 static int 826 msdosfs_ioctl(ap) 827 struct vop_ioctl_args /* { 828 struct vnode *a_vp; 829 int a_command; 830 caddr_t a_data; 831 int a_fflag; 832 struct ucred *a_cred; 833 struct proc *a_p; 834 } */ *ap; 835 { 836 return ENOTTY; 837 } 838 839 static int 840 msdosfs_select(ap) 841 struct vop_select_args /* { 842 struct vnode *a_vp; 843 int a_which; 844 int a_fflags; 845 struct ucred *a_cred; 846 struct proc *a_p; 847 } */ *ap; 848 { 849 return 1; /* DOS filesystems never block? */ 850 } 851 852 static int 853 msdosfs_mmap(ap) 854 struct vop_mmap_args /* { 855 struct vnode *a_vp; 856 int a_fflags; 857 struct ucred *a_cred; 858 struct proc *a_p; 859 } */ *ap; 860 { 861 return EINVAL; 862 } 863 864 /* 865 * Flush the blocks of a file to disk. 866 * 867 * This function is worthless for vnodes that represent directories. Maybe we 868 * could just do a sync if they try an fsync on a directory file. 869 */ 870 static int 871 msdosfs_fsync(ap) 872 struct vop_fsync_args /* { 873 struct vnode *a_vp; 874 struct ucred *a_cred; 875 int a_waitfor; 876 struct proc *a_p; 877 } */ *ap; 878 { 879 register struct vnode *vp = ap->a_vp; 880 register struct buf *bp; 881 int wait = ap->a_waitfor == MNT_WAIT; 882 struct timespec ts; 883 struct buf *nbp; 884 int s; 885 886 /* 887 * Flush all dirty buffers associated with a vnode. 888 */ 889 loop: 890 s = splbio(); 891 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 892 nbp = bp->b_vnbufs.le_next; 893 if ((bp->b_flags & B_BUSY)) 894 continue; 895 if ((bp->b_flags & B_DELWRI) == 0) 896 panic("msdosfs_fsync: not dirty"); 897 bremfree(bp); 898 bp->b_flags |= B_BUSY; 899 splx(s); 900 (void) bwrite(bp); 901 goto loop; 902 } 903 while (vp->v_numoutput) { 904 vp->v_flag |= VBWAIT; 905 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 906 } 907 #ifdef DIAGNOSTIC 908 if (vp->v_dirtyblkhd.lh_first) { 909 vprint("msdosfs_fsync: dirty", vp); 910 goto loop; 911 } 912 #endif 913 splx(s); 914 TIMEVAL_TO_TIMESPEC(&time, &ts); 915 return deupdat(VTODE(vp), &ts, wait); 916 } 917 918 /* 919 * Now the whole work of extending a file is done in the write function. 920 * So nothing to do here. 921 */ 922 static int 923 msdosfs_seek(ap) 924 struct vop_seek_args /* { 925 struct vnode *a_vp; 926 off_t a_oldoff; 927 off_t a_newoff; 928 struct ucred *a_cred; 929 } */ *ap; 930 { 931 return 0; 932 } 933 934 static int 935 msdosfs_remove(ap) 936 struct vop_remove_args /* { 937 struct vnode *a_dvp; 938 struct vnode *a_vp; 939 struct componentname *a_cnp; 940 } */ *ap; 941 { 942 int error; 943 struct denode *dep = VTODE(ap->a_vp); 944 struct denode *ddep = VTODE(ap->a_dvp); 945 946 error = removede(ddep,dep); 947 #ifdef MSDOSFS_DEBUG 948 printf("msdosfs_remove(), dep %08x, v_usecount %d\n", dep, ap->a_vp->v_usecount); 949 #endif 950 if (ddep == dep) 951 vrele(ap->a_vp); 952 else 953 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 954 * via vrele() */ 955 vput(ap->a_dvp); 956 return error; 957 } 958 959 /* 960 * DOS filesystems don't know what links are. But since we already called 961 * msdosfs_lookup() with create and lockparent, the parent is locked so we 962 * have to free it before we return the error. 963 */ 964 static int 965 msdosfs_link(ap) 966 struct vop_link_args /* { 967 struct vnode *a_tdvp; 968 struct vnode *a_vp; 969 struct componentname *a_cnp; 970 } */ *ap; 971 { 972 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 973 vput(ap->a_tdvp); 974 return EOPNOTSUPP; 975 } 976 977 /* 978 * Renames on files require moving the denode to a new hash queue since the 979 * denode's location is used to compute which hash queue to put the file 980 * in. Unless it is a rename in place. For example "mv a b". 981 * 982 * What follows is the basic algorithm: 983 * 984 * if (file move) { 985 * if (dest file exists) { 986 * remove dest file 987 * } 988 * if (dest and src in same directory) { 989 * rewrite name in existing directory slot 990 * } else { 991 * write new entry in dest directory 992 * update offset and dirclust in denode 993 * move denode to new hash chain 994 * clear old directory entry 995 * } 996 * } else { 997 * directory move 998 * if (dest directory exists) { 999 * if (dest is not empty) { 1000 * return ENOTEMPTY 1001 * } 1002 * remove dest directory 1003 * } 1004 * if (dest and src in same directory) { 1005 * rewrite name in existing entry 1006 * } else { 1007 * be sure dest is not a child of src directory 1008 * write entry in dest directory 1009 * update "." and ".." in moved directory 1010 * clear old directory entry for moved directory 1011 * } 1012 * } 1013 * 1014 * On entry: 1015 * source's parent directory is unlocked 1016 * source file or directory is unlocked 1017 * destination's parent directory is locked 1018 * destination file or directory is locked if it exists 1019 * 1020 * On exit: 1021 * all denodes should be released 1022 * 1023 * Notes: 1024 * I'm not sure how the memory containing the pathnames pointed at by the 1025 * componentname structures is freed, there may be some memory bleeding 1026 * for each rename done. 1027 */ 1028 static int 1029 msdosfs_rename(ap) 1030 struct vop_rename_args /* { 1031 struct vnode *a_fdvp; 1032 struct vnode *a_fvp; 1033 struct componentname *a_fcnp; 1034 struct vnode *a_tdvp; 1035 struct vnode *a_tvp; 1036 struct componentname *a_tcnp; 1037 } */ *ap; 1038 { 1039 u_char toname[11]; 1040 int error; 1041 int newparent = 0; 1042 int sourceisadirectory = 0; 1043 u_long cn; 1044 daddr_t bn; 1045 struct vnode *tvp = ap->a_tvp; 1046 struct denode *fddep; /* from file's parent directory */ 1047 struct denode *fdep; /* from file or directory */ 1048 struct denode *tddep; /* to file's parent directory */ 1049 struct denode *tdep; /* to file or directory */ 1050 struct msdosfsmount *pmp; 1051 struct direntry *dotdotp; 1052 struct direntry *ep; 1053 struct buf *bp; 1054 1055 fddep = VTODE(ap->a_fdvp); 1056 fdep = VTODE(ap->a_fvp); 1057 tddep = VTODE(ap->a_tdvp); 1058 tdep = tvp ? VTODE(tvp) : NULL; 1059 pmp = fddep->de_pmp; 1060 1061 /* Check for cross-device rename */ 1062 if ((ap->a_fvp->v_mount != ap->a_tdvp->v_mount) || 1063 (tvp && (ap->a_fvp->v_mount != tvp->v_mount))) { 1064 error = EXDEV; 1065 goto bad; 1066 } 1067 1068 /* 1069 * Convert the filename in tcnp into a dos filename. We copy this 1070 * into the denode and directory entry for the destination 1071 * file/directory. 1072 */ 1073 unix2dosfn((u_char *) ap->a_tcnp->cn_nameptr, 1074 toname, ap->a_tcnp->cn_namelen); 1075 1076 /* 1077 * At this point this is the lock state of the denodes: 1078 * fddep referenced 1079 * fdep referenced 1080 * tddep locked 1081 * tdep locked if it exists 1082 */ 1083 1084 /* 1085 * Be sure we are not renaming ".", "..", or an alias of ".". This 1086 * leads to a crippled directory tree. It's pretty tough to do a 1087 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1088 * doesn't work if the ".." entry is missing. 1089 */ 1090 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1091 if ((ap->a_fcnp->cn_namelen == 1 1092 && ap->a_fcnp->cn_nameptr[0] == '.') 1093 || fddep == fdep 1094 || (ap->a_fcnp->cn_flags | ap->a_tcnp->cn_flags) 1095 & ISDOTDOT) { 1096 VOP_ABORTOP(ap->a_tdvp, ap->a_tcnp); 1097 vput(ap->a_tdvp); 1098 if (tvp) 1099 vput(tvp); 1100 VOP_ABORTOP(ap->a_fdvp, ap->a_fcnp); 1101 vrele(ap->a_fdvp); 1102 vrele(ap->a_fvp); 1103 return EINVAL; 1104 } 1105 sourceisadirectory = 1; 1106 } 1107 1108 /* 1109 * If we are renaming a directory, and the directory is being moved 1110 * to another directory, then we must be sure the destination 1111 * directory is not in the subtree of the source directory. This 1112 * could orphan everything under the source directory. 1113 * doscheckpath() unlocks the destination's parent directory so we 1114 * must look it up again to relock it. 1115 */ 1116 if (fddep->de_StartCluster != tddep->de_StartCluster) 1117 newparent = 1; 1118 if (sourceisadirectory && newparent) { 1119 if (tdep) { 1120 vput(ap->a_tvp); 1121 tdep = NULL; 1122 } 1123 /* doscheckpath() vput()'s tddep */ 1124 error = doscheckpath(fdep, tddep); 1125 tddep = NULL; 1126 if (error) 1127 goto bad; 1128 if ((ap->a_tcnp->cn_flags & SAVESTART) == 0) 1129 panic("msdosfs_rename(): lost to startdir"); 1130 error = relookup(ap->a_tdvp, &tvp, ap->a_tcnp); 1131 if (error) 1132 goto bad; 1133 tddep = VTODE(ap->a_tdvp); 1134 tdep = tvp ? VTODE(tvp) : NULL; 1135 } 1136 1137 /* 1138 * If the destination exists, then be sure its type (file or dir) 1139 * matches that of the source. And, if it is a directory make sure 1140 * it is empty. Then delete the destination. 1141 */ 1142 if (tdep) { 1143 if (tdep->de_Attributes & ATTR_DIRECTORY) { 1144 if (!sourceisadirectory) { 1145 error = ENOTDIR; 1146 goto bad; 1147 } 1148 if (!dosdirempty(tdep)) { 1149 error = ENOTEMPTY; 1150 goto bad; 1151 } 1152 cache_purge(DETOV(tddep)); 1153 } else { /* destination is file */ 1154 if (sourceisadirectory) { 1155 error = EISDIR; 1156 goto bad; 1157 } 1158 } 1159 error = removede(tddep,tdep); 1160 if (error) 1161 goto bad; 1162 vput(ap->a_tvp); 1163 tdep = NULL; 1164 } 1165 1166 /* 1167 * If the source and destination are in the same directory then 1168 * just read in the directory entry, change the name in the 1169 * directory entry and write it back to disk. 1170 */ 1171 if (newparent == 0) { 1172 /* tddep and fddep point to the same denode here */ 1173 VOP_LOCK(ap->a_fvp); /* ap->a_fdvp is already locked */ 1174 error = readep(fddep->de_pmp, fdep->de_dirclust, 1175 fdep->de_diroffset, &bp, &ep); 1176 if (error) { 1177 VOP_UNLOCK(ap->a_fvp); 1178 goto bad; 1179 } 1180 bcopy(toname, ep->deName, 11); 1181 error = bwrite(bp); 1182 if (error) { 1183 VOP_UNLOCK(ap->a_fvp); 1184 goto bad; 1185 } 1186 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1187 /* 1188 * fdep locked fddep and tddep point to the same denode 1189 * which is locked tdep is NULL 1190 */ 1191 } else { 1192 u_long dirsize = 0L; 1193 1194 /* 1195 * If the source and destination are in different 1196 * directories, then mark the entry in the source directory 1197 * as deleted and write a new entry in the destination 1198 * directory. Then move the denode to the correct hash 1199 * chain for its new location in the filesystem. And, if 1200 * we moved a directory, then update its .. entry to point 1201 * to the new parent directory. If we moved a directory 1202 * will also insure that the directory entry on disk has a 1203 * filesize of zero. 1204 */ 1205 VOP_LOCK(ap->a_fvp); 1206 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1207 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1208 dirsize = fdep->de_FileSize; 1209 fdep->de_FileSize = 0; 1210 } 1211 error = createde(fdep, tddep, (struct denode **) 0); 1212 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1213 fdep->de_FileSize = dirsize; 1214 } 1215 if (error) { 1216 /* should put back filename */ 1217 VOP_UNLOCK(ap->a_fvp); 1218 goto bad; 1219 } 1220 VOP_LOCK(ap->a_fdvp); 1221 error = readep(fddep->de_pmp, fddep->de_fndclust, 1222 fddep->de_fndoffset, &bp, &ep); 1223 if (error) { 1224 VOP_UNLOCK(ap->a_fvp); 1225 VOP_UNLOCK(ap->a_fdvp); 1226 goto bad; 1227 } 1228 ep->deName[0] = SLOT_DELETED; 1229 error = bwrite(bp); 1230 if (error) { 1231 VOP_UNLOCK(ap->a_fvp); 1232 VOP_UNLOCK(ap->a_fdvp); 1233 goto bad; 1234 } 1235 if (!sourceisadirectory) { 1236 fdep->de_dirclust = tddep->de_fndclust; 1237 fdep->de_diroffset = tddep->de_fndoffset; 1238 reinsert(fdep); 1239 } 1240 VOP_UNLOCK(ap->a_fdvp); 1241 } 1242 /* fdep is still locked here */ 1243 1244 /* 1245 * If we moved a directory to a new parent directory, then we must 1246 * fixup the ".." entry in the moved directory. 1247 */ 1248 if (sourceisadirectory && newparent) { 1249 cn = fdep->de_StartCluster; 1250 if (cn == MSDOSFSROOT) { 1251 /* this should never happen */ 1252 panic("msdosfs_rename(): updating .. in root directory?"); 1253 } else { 1254 bn = cntobn(pmp, cn); 1255 } 1256 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1257 NOCRED, &bp); 1258 if (error) { 1259 /* should really panic here, fs is corrupt */ 1260 VOP_UNLOCK(ap->a_fvp); 1261 goto bad; 1262 } 1263 dotdotp = (struct direntry *) bp->b_data + 1; 1264 putushort(dotdotp->deStartCluster, tddep->de_StartCluster); 1265 error = bwrite(bp); 1266 VOP_UNLOCK(ap->a_fvp); 1267 if (error) { 1268 /* should really panic here, fs is corrupt */ 1269 goto bad; 1270 } 1271 } else 1272 VOP_UNLOCK(ap->a_fvp); 1273 bad: ; 1274 vrele(DETOV(fdep)); 1275 vrele(DETOV(fddep)); 1276 if (tdep) 1277 vput(DETOV(tdep)); 1278 if (tddep) 1279 vput(DETOV(tddep)); 1280 return error; 1281 } 1282 1283 static struct { 1284 struct direntry dot; 1285 struct direntry dotdot; 1286 } dosdirtemplate = { 1287 { 1288 ". ", " ", /* the . entry */ 1289 ATTR_DIRECTORY, /* file attribute */ 1290 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1291 {210, 4}, {210, 4}, /* time and date */ 1292 {0, 0}, /* startcluster */ 1293 {0, 0, 0, 0}, /* filesize */ 1294 },{ 1295 ".. ", " ", /* the .. entry */ 1296 ATTR_DIRECTORY, /* file attribute */ 1297 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1298 {210, 4}, {210, 4}, /* time and date */ 1299 {0, 0}, /* startcluster */ 1300 {0, 0, 0, 0}, /* filesize */ 1301 } 1302 }; 1303 1304 static int 1305 msdosfs_mkdir(ap) 1306 struct vop_mkdir_args /* { 1307 struct vnode *a_dvp; 1308 struvt vnode **a_vpp; 1309 struvt componentname *a_cnp; 1310 struct vattr *a_vap; 1311 } */ *ap; 1312 { 1313 int bn; 1314 int error; 1315 u_long newcluster; 1316 struct denode *pdep; 1317 struct denode *ndep; 1318 struct direntry *denp; 1319 struct denode ndirent; 1320 struct msdosfsmount *pmp; 1321 struct buf *bp; 1322 struct timespec ts; 1323 u_short dDate, dTime; 1324 1325 pdep = VTODE(ap->a_dvp); 1326 1327 /* 1328 * If this is the root directory and there is no space left we 1329 * can't do anything. This is because the root directory can not 1330 * change size. 1331 */ 1332 if (pdep->de_StartCluster == MSDOSFSROOT && pdep->de_fndclust == (u_long)-1) { 1333 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1334 vput(ap->a_dvp); 1335 return ENOSPC; 1336 } 1337 1338 pmp = pdep->de_pmp; 1339 1340 /* 1341 * Allocate a cluster to hold the about to be created directory. 1342 */ 1343 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1344 if (error) { 1345 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1346 vput(ap->a_dvp); 1347 return error; 1348 } 1349 1350 /* 1351 * Now fill the cluster with the "." and ".." entries. And write 1352 * the cluster to disk. This way it is there for the parent 1353 * directory to be pointing at if there were a crash. 1354 */ 1355 bn = cntobn(pmp, newcluster); 1356 /* always succeeds */ 1357 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1358 bzero(bp->b_data, pmp->pm_bpcluster); 1359 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1360 denp = (struct direntry *) bp->b_data; 1361 putushort(denp->deStartCluster, newcluster); 1362 TIMEVAL_TO_TIMESPEC(&time, &ts); 1363 unix2dostime(&ts, &dDate, &dTime); 1364 putushort(denp->deDate, dDate); 1365 putushort(denp->deTime, dTime); 1366 denp++; 1367 putushort(denp->deStartCluster, pdep->de_StartCluster); 1368 putushort(denp->deDate, dDate); 1369 putushort(denp->deTime, dTime); 1370 error = bwrite(bp); 1371 if (error) { 1372 clusterfree(pmp, newcluster, NULL); 1373 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1374 vput(ap->a_dvp); 1375 return error; 1376 } 1377 1378 /* 1379 * Now build up a directory entry pointing to the newly allocated 1380 * cluster. This will be written to an empty slot in the parent 1381 * directory. 1382 */ 1383 ndep = &ndirent; 1384 bzero(ndep, sizeof(*ndep)); 1385 unix2dosfn((u_char *)ap->a_cnp->cn_nameptr, 1386 ndep->de_Name, ap->a_cnp->cn_namelen); 1387 TIMEVAL_TO_TIMESPEC(&time, &ts); 1388 unix2dostime(&ts, &ndep->de_Date, &ndep->de_Time); 1389 ndep->de_StartCluster = newcluster; 1390 ndep->de_Attributes = ATTR_DIRECTORY; 1391 1392 error = createde(ndep, pdep, &ndep); 1393 if (error) { 1394 clusterfree(pmp, newcluster, NULL); 1395 } else { 1396 *ap->a_vpp = DETOV(ndep); 1397 } 1398 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1399 #ifdef MSDOSFS_DEBUG 1400 printf("msdosfs_mkdir(): vput(%08x)\n", ap->a_dvp); 1401 #endif 1402 vput(ap->a_dvp); 1403 return error; 1404 } 1405 1406 static int 1407 msdosfs_rmdir(ap) 1408 struct vop_rmdir_args /* { 1409 struct vnode *a_dvp; 1410 struct vnode *a_vp; 1411 struct componentname *a_cnp; 1412 } */ *ap; 1413 { 1414 struct denode *ddep; 1415 struct denode *dep; 1416 int error = 0; 1417 1418 ddep = VTODE(ap->a_dvp); /* parent dir of dir to delete */ 1419 dep = VTODE(ap->a_vp);/* directory to delete */ 1420 1421 /* 1422 * Don't let "rmdir ." go thru. 1423 */ 1424 if (ddep == dep) { 1425 vrele(ap->a_vp); 1426 vput(ap->a_vp); 1427 return EINVAL; 1428 } 1429 1430 /* 1431 * Be sure the directory being deleted is empty. 1432 */ 1433 if (dosdirempty(dep) == 0) { 1434 error = ENOTEMPTY; 1435 goto out; 1436 } 1437 1438 /* 1439 * Delete the entry from the directory. For dos filesystems this 1440 * gets rid of the directory entry on disk, the in memory copy 1441 * still exists but the de_refcnt is <= 0. This prevents it from 1442 * being found by deget(). When the vput() on dep is done we give 1443 * up access and eventually msdosfs_reclaim() will be called which 1444 * will remove it from the denode cache. 1445 */ 1446 error = removede(ddep,dep); 1447 if (error) 1448 goto out; 1449 1450 /* 1451 * This is where we decrement the link count in the parent 1452 * directory. Since dos filesystems don't do this we just purge 1453 * the name cache and let go of the parent directory denode. 1454 */ 1455 cache_purge(DETOV(ddep)); 1456 vput(ap->a_dvp); 1457 ap->a_dvp = NULL; 1458 1459 /* 1460 * Truncate the directory that is being deleted. 1461 */ 1462 error = detrunc(dep, (u_long) 0, IO_SYNC, NOCRED, NULL); 1463 cache_purge(DETOV(dep)); 1464 1465 out: ; 1466 if (ap->a_dvp) 1467 vput(ap->a_dvp); 1468 vput(ap->a_vp); 1469 return error; 1470 } 1471 1472 /* 1473 * DOS filesystems don't know what symlinks are. 1474 */ 1475 static int 1476 msdosfs_symlink(ap) 1477 struct vop_symlink_args /* { 1478 struct vnode *a_dvp; 1479 struct vnode **a_vpp; 1480 struct componentname *a_cnp; 1481 struct vattr *a_vap; 1482 char *a_target; 1483 } */ *ap; 1484 { 1485 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1486 vput(ap->a_dvp); 1487 return EINVAL; 1488 } 1489 1490 /* 1491 * Dummy dirents to simulate the "." and ".." entries of the root directory 1492 * in a dos filesystem. Dos doesn't provide these. Note that each entry 1493 * must be the same size as a dos directory entry (32 bytes). 1494 */ 1495 static struct dos_dirent { 1496 u_long d_fileno; 1497 u_short d_reclen; 1498 u_char d_type; 1499 u_char d_namlen; 1500 u_char d_name[24]; 1501 } rootdots[2] = { 1502 1503 { 1504 1, /* d_fileno */ 1505 sizeof(struct direntry), /* d_reclen */ 1506 DT_DIR, /* d_type */ 1507 1, /* d_namlen */ 1508 "." /* d_name */ 1509 }, 1510 { 1511 1, /* d_fileno */ 1512 sizeof(struct direntry), /* d_reclen */ 1513 DT_DIR, /* d_type */ 1514 2, /* d_namlen */ 1515 ".." /* d_name */ 1516 } 1517 }; 1518 1519 static int 1520 msdosfs_readdir(ap) 1521 struct vop_readdir_args /* { 1522 struct vnode *a_vp; 1523 struct uio *a_uio; 1524 struct ucred *a_cred; 1525 int *a_eofflag; 1526 u_int *a_cookies; 1527 int a_ncookies; 1528 } */ *ap; 1529 { 1530 int error = 0; 1531 int diff; 1532 char pushout; 1533 long n; 1534 long on; 1535 long lost; 1536 long count; 1537 u_long cn; 1538 u_long fileno; 1539 long bias = 0; 1540 daddr_t bn; 1541 daddr_t lbn; 1542 struct buf *bp; 1543 struct denode *dep = VTODE(ap->a_vp); 1544 struct msdosfsmount *pmp = dep->de_pmp; 1545 struct direntry *dentp; 1546 struct dirent *prev; 1547 struct dirent *crnt; 1548 u_char dirbuf[512]; /* holds converted dos directories */ 1549 struct uio *uio = ap->a_uio; 1550 off_t off; 1551 int ncookies = 0; 1552 1553 #ifdef MSDOSFS_DEBUG 1554 printf("msdosfs_readdir(): vp %08x, uio %08x, cred %08x, eofflagp %08x\n", 1555 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1556 #endif 1557 1558 /* 1559 * msdosfs_readdir() won't operate properly on regular files since 1560 * it does i/o only with the the filesystem vnode, and hence can 1561 * retrieve the wrong block from the buffer cache for a plain file. 1562 * So, fail attempts to readdir() on a plain file. 1563 */ 1564 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1565 return ENOTDIR; 1566 1567 /* 1568 * If the user buffer is smaller than the size of one dos directory 1569 * entry or the file offset is not a multiple of the size of a 1570 * directory entry, then we fail the read. 1571 */ 1572 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1573 lost = uio->uio_resid - count; 1574 if (count < sizeof(struct direntry) || 1575 (uio->uio_offset & (sizeof(struct direntry) - 1))) 1576 return EINVAL; 1577 uio->uio_resid = count; 1578 uio->uio_iov->iov_len = count; 1579 off = uio->uio_offset; 1580 1581 /* 1582 * If they are reading from the root directory then, we simulate 1583 * the . and .. entries since these don't exist in the root 1584 * directory. We also set the offset bias to make up for having to 1585 * simulate these entries. By this I mean that at file offset 64 we 1586 * read the first entry in the root directory that lives on disk. 1587 */ 1588 if (dep->de_StartCluster == MSDOSFSROOT) { 1589 /* 1590 * printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1591 * uio->uio_offset); 1592 */ 1593 bias = 2 * sizeof(struct direntry); 1594 if (uio->uio_offset < 2 * sizeof(struct direntry)) { 1595 if (uio->uio_offset 1596 && uio->uio_offset != sizeof(struct direntry)) { 1597 error = EINVAL; 1598 goto out; 1599 } 1600 n = 1; 1601 if (!uio->uio_offset) { 1602 n = 2; 1603 ncookies++; 1604 } 1605 ncookies++; 1606 error = uiomove((char *) rootdots + uio->uio_offset, 1607 n * sizeof(struct direntry), uio); 1608 } 1609 } 1610 while (!error && uio->uio_resid > 0) { 1611 lbn = (uio->uio_offset - bias) >> pmp->pm_cnshift; 1612 on = (uio->uio_offset - bias) & pmp->pm_crbomask; 1613 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 1614 diff = dep->de_FileSize - (uio->uio_offset - bias); 1615 if (diff <= 0) 1616 break; 1617 if (diff < n) 1618 n = diff; 1619 error = pcbmap(dep, lbn, &bn, &cn); 1620 if (error) 1621 break; 1622 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, NOCRED, &bp); 1623 n = min(n, pmp->pm_bpcluster - bp->b_resid); 1624 if (error) { 1625 brelse(bp); 1626 return error; 1627 } 1628 1629 /* 1630 * code to convert from dos directory entries to ufs 1631 * directory entries 1632 */ 1633 pushout = 0; 1634 dentp = (struct direntry *)(bp->b_data + on); 1635 prev = 0; 1636 crnt = (struct dirent *) dirbuf; 1637 while ((char *) dentp < bp->b_data + on + n) { 1638 /* 1639 * printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1640 * dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1641 */ 1642 /* 1643 * If we have an empty entry or a slot from a 1644 * deleted file, or a volume label entry just 1645 * concatenate its space onto the end of the 1646 * previous entry or, manufacture an empty entry if 1647 * there is no previous entry. 1648 */ 1649 if (dentp->deName[0] == SLOT_EMPTY || 1650 dentp->deName[0] == SLOT_DELETED || 1651 (dentp->deAttributes & ATTR_VOLUME)) { 1652 if (prev) { 1653 prev->d_reclen += sizeof(struct direntry); 1654 } else { 1655 prev = crnt; 1656 prev->d_fileno = 0; 1657 prev->d_reclen = sizeof(struct direntry); 1658 prev->d_type = DT_UNKNOWN; 1659 prev->d_namlen = 0; 1660 prev->d_name[0] = 0; 1661 ncookies++; 1662 } 1663 } else { 1664 /* 1665 * this computation of d_fileno must match 1666 * the computation of va_fileid in 1667 * msdosfs_getattr 1668 */ 1669 if (dentp->deAttributes & ATTR_DIRECTORY) { 1670 /* if this is the root directory */ 1671 fileno = getushort(dentp->deStartCluster); 1672 if (fileno == MSDOSFSROOT) 1673 fileno = 1; 1674 } else { 1675 /* 1676 * if the file's dirent lives in 1677 * root dir 1678 */ 1679 if ((fileno = cn) == MSDOSFSROOT) 1680 fileno = 1; 1681 fileno = (fileno << 16) | 1682 ((dentp - (struct direntry *) bp->b_data) & 0xffff); 1683 } 1684 crnt->d_fileno = fileno; 1685 crnt->d_reclen = sizeof(struct direntry); 1686 crnt->d_type = (dentp->deAttributes & ATTR_DIRECTORY) 1687 ? DT_DIR : DT_REG; 1688 crnt->d_namlen = dos2unixfn(dentp->deName, 1689 (u_char *)crnt->d_name); 1690 /* 1691 * printf("readdir: file %s, fileno %08x, attr %02x, start %08x\n", 1692 * crnt->d_name, crnt->d_fileno, dentp->deAttributes, 1693 * dentp->deStartCluster); 1694 */ 1695 prev = crnt; 1696 ncookies++; 1697 } 1698 dentp++; 1699 1700 crnt = (struct dirent *) ((char *) crnt + sizeof(struct direntry)); 1701 pushout = 1; 1702 1703 /* 1704 * If our intermediate buffer is full then copy its 1705 * contents to user space. I would just use the 1706 * buffer the buf header points to but, I'm afraid 1707 * that when we brelse() it someone else might find 1708 * it in the cache and think its contents are 1709 * valid. Maybe there is a way to invalidate the 1710 * buffer before brelse()'ing it. 1711 */ 1712 if ((u_char *) crnt >= &dirbuf[sizeof dirbuf]) { 1713 pushout = 0; 1714 error = uiomove(dirbuf, sizeof(dirbuf), uio); 1715 if (error) 1716 break; 1717 prev = 0; 1718 crnt = (struct dirent *) dirbuf; 1719 } 1720 } 1721 if (pushout) { 1722 pushout = 0; 1723 error = uiomove(dirbuf, (char *) crnt - (char *) dirbuf, 1724 uio); 1725 } 1726 1727 #if 0 1728 /* 1729 * If we have read everything from this block or have read 1730 * to end of file then we are done with this block. Mark 1731 * it to say the buffer can be reused if need be. 1732 */ 1733 if (n + on == pmp->pm_bpcluster || 1734 (uio->uio_offset - bias) == dep->de_FileSize) 1735 bp->b_flags |= B_AGE; 1736 #endif /* if 0 */ 1737 brelse(bp); 1738 if (n == 0) 1739 break; 1740 } 1741 out: ; 1742 uio->uio_resid += lost; 1743 if (!error && ap->a_ncookies != NULL) { 1744 struct dirent* dpStart; 1745 struct dirent* dpEnd; 1746 struct dirent* dp; 1747 u_int *cookies; 1748 u_int *cookiep; 1749 1750 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1751 panic("msdosfs_readdir: unexpected uio from NFS server"); 1752 dpStart = (struct dirent *) 1753 (uio->uio_iov->iov_base - (uio->uio_offset - off)); 1754 dpEnd = (struct dirent *) uio->uio_iov->iov_base; 1755 MALLOC(cookies, u_int *, ncookies * sizeof(u_int), 1756 M_TEMP, M_WAITOK); 1757 for (dp = dpStart, cookiep = cookies; 1758 dp < dpEnd; 1759 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 1760 off += dp->d_reclen; 1761 *cookiep++ = (u_int) off; 1762 } 1763 *ap->a_ncookies = ncookies; 1764 *ap->a_cookies = cookies; 1765 } 1766 1767 /* 1768 * Set the eofflag (NFS uses it) 1769 */ 1770 if (ap->a_eofflag) 1771 if (dep->de_FileSize - (uio->uio_offset - bias) <= 0) 1772 *ap->a_eofflag = 1; 1773 else 1774 *ap->a_eofflag = 0; 1775 1776 return error; 1777 } 1778 1779 /* 1780 * DOS filesystems don't know what symlinks are. 1781 */ 1782 static int 1783 msdosfs_readlink(ap) 1784 struct vop_readlink_args /* { 1785 struct vnode *a_vp; 1786 struct uio *a_uio; 1787 struct ucred *a_cred; 1788 } */ *ap; 1789 { 1790 return EINVAL; 1791 } 1792 1793 static int 1794 msdosfs_abortop(ap) 1795 struct vop_abortop_args /* { 1796 struct vnode *a_dvp; 1797 struct componentname *a_cnp; 1798 } */ *ap; 1799 { 1800 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1801 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 1802 return 0; 1803 } 1804 1805 static int 1806 msdosfs_lock(ap) 1807 struct vop_lock_args /* { 1808 struct vnode *a_vp; 1809 } */ *ap; 1810 { 1811 struct denode *dep = VTODE(ap->a_vp); 1812 1813 while (dep->de_flag & DE_LOCKED) { 1814 dep->de_flag |= DE_WANTED; 1815 if (dep->de_lockholder == curproc->p_pid) 1816 panic("msdosfs_lock: locking against myself"); 1817 dep->de_lockwaiter = curproc->p_pid; 1818 (void) tsleep((caddr_t) dep, PINOD, "msdlck", 0); 1819 } 1820 dep->de_lockwaiter = 0; 1821 dep->de_lockholder = curproc->p_pid; 1822 dep->de_flag |= DE_LOCKED; 1823 return 0; 1824 } 1825 1826 static int 1827 msdosfs_unlock(ap) 1828 struct vop_unlock_args /* { 1829 struct vnode *vp; 1830 } */ *ap; 1831 { 1832 struct denode *dep = VTODE(ap->a_vp); 1833 1834 if (!(dep->de_flag & DE_LOCKED)) 1835 panic("msdosfs_unlock: denode not locked"); 1836 dep->de_lockholder = 0; 1837 dep->de_flag &= ~DE_LOCKED; 1838 if (dep->de_flag & DE_WANTED) { 1839 dep->de_flag &= ~DE_WANTED; 1840 wakeup((caddr_t) dep); 1841 } 1842 return 0; 1843 } 1844 1845 static int 1846 msdosfs_islocked(ap) 1847 struct vop_islocked_args /* { 1848 struct vnode *a_vp; 1849 } */ *ap; 1850 { 1851 return VTODE(ap->a_vp)->de_flag & DE_LOCKED ? 1 : 0; 1852 } 1853 1854 /* 1855 * vp - address of vnode file the file 1856 * bn - which cluster we are interested in mapping to a filesystem block number. 1857 * vpp - returns the vnode for the block special file holding the filesystem 1858 * containing the file of interest 1859 * bnp - address of where to return the filesystem relative block number 1860 */ 1861 static int 1862 msdosfs_bmap(ap) 1863 struct vop_bmap_args /* { 1864 struct vnode *a_vp; 1865 daddr_t a_bn; 1866 struct vnode **a_vpp; 1867 daddr_t *a_bnp; 1868 int *a_runp; 1869 int *a_runb; 1870 } */ *ap; 1871 { 1872 struct denode *dep = VTODE(ap->a_vp); 1873 1874 if (ap->a_vpp != NULL) 1875 *ap->a_vpp = dep->de_devvp; 1876 if (ap->a_bnp == NULL) 1877 return 0; 1878 if (ap->a_runp) { 1879 /* 1880 * Sequential clusters should be counted here. 1881 */ 1882 *ap->a_runp = 0; 1883 } 1884 if (ap->a_runb) { 1885 *ap->a_runb = 0; 1886 } 1887 return pcbmap(dep, ap->a_bn, ap->a_bnp, 0); 1888 } 1889 1890 static int 1891 msdosfs_reallocblks(ap) 1892 struct vop_reallocblks_args /* { 1893 struct vnode *a_vp; 1894 struct cluster_save *a_buflist; 1895 } */ *ap; 1896 { 1897 /* Currently no support for clustering */ /* XXX */ 1898 return ENOSPC; 1899 } 1900 1901 static int 1902 msdosfs_strategy(ap) 1903 struct vop_strategy_args /* { 1904 struct buf *a_bp; 1905 } */ *ap; 1906 { 1907 struct buf *bp = ap->a_bp; 1908 struct denode *dep = VTODE(bp->b_vp); 1909 struct vnode *vp; 1910 int error = 0; 1911 1912 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1913 panic("msdosfs_strategy: spec"); 1914 /* 1915 * If we don't already know the filesystem relative block number 1916 * then get it using pcbmap(). If pcbmap() returns the block 1917 * number as -1 then we've got a hole in the file. DOS filesystems 1918 * don't allow files with holes, so we shouldn't ever see this. 1919 */ 1920 if (bp->b_blkno == bp->b_lblkno) { 1921 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0); 1922 if (error) 1923 bp->b_blkno = -1; 1924 if (bp->b_blkno == -1) 1925 clrbuf(bp); 1926 } 1927 if (bp->b_blkno == -1) { 1928 biodone(bp); 1929 return error; 1930 } 1931 #ifdef DIAGNOSTIC 1932 #endif 1933 /* 1934 * Read/write the block from/to the disk that contains the desired 1935 * file block. 1936 */ 1937 vp = dep->de_devvp; 1938 bp->b_dev = vp->v_rdev; 1939 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1940 return 0; 1941 } 1942 1943 static int 1944 msdosfs_print(ap) 1945 struct vop_print_args /* { 1946 struct vnode *vp; 1947 } */ *ap; 1948 { 1949 struct denode *dep = VTODE(ap->a_vp); 1950 1951 printf( 1952 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1953 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1954 printf(" dev %d, %d, %s\n", 1955 major(dep->de_dev), minor(dep->de_dev), 1956 dep->de_flag & DE_LOCKED ? "(LOCKED)" : ""); 1957 if (dep->de_lockholder) { 1958 printf(" owner pid %d", (int)dep->de_lockholder); 1959 if (dep->de_lockwaiter) 1960 printf(" waiting pid %d", (int)dep->de_lockwaiter); 1961 printf("\n"); 1962 } 1963 return 0; 1964 } 1965 1966 static int 1967 msdosfs_advlock(ap) 1968 struct vop_advlock_args /* { 1969 struct vnode *a_vp; 1970 caddr_t a_id; 1971 int a_op; 1972 struct flock *a_fl; 1973 int a_flags; 1974 } */ *ap; 1975 { 1976 return EINVAL; /* we don't do locking yet */ 1977 } 1978 1979 static int 1980 msdosfs_pathconf(ap) 1981 struct vop_pathconf_args /* { 1982 struct vnode *a_vp; 1983 int a_name; 1984 int *a_retval; 1985 } */ *ap; 1986 { 1987 switch (ap->a_name) { 1988 case _PC_LINK_MAX: 1989 *ap->a_retval = 1; 1990 return 0; 1991 case _PC_NAME_MAX: 1992 *ap->a_retval = 12; 1993 return 0; 1994 case _PC_PATH_MAX: 1995 *ap->a_retval = PATH_MAX; /* 255? */ 1996 return 0; 1997 case _PC_CHOWN_RESTRICTED: 1998 *ap->a_retval = 1; 1999 return 0; 2000 case _PC_NO_TRUNC: 2001 *ap->a_retval = 0; 2002 return 0; 2003 default: 2004 return EINVAL; 2005 } 2006 } 2007 2008 /* Global vfs data structures for msdosfs */ 2009 vop_t **msdosfs_vnodeop_p; 2010 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 2011 { &vop_default_desc, (vop_t *)vn_default_error }, 2012 { &vop_lookup_desc, (vop_t *)msdosfs_lookup }, /* lookup */ 2013 { &vop_create_desc, (vop_t *)msdosfs_create }, /* create */ 2014 { &vop_mknod_desc, (vop_t *)msdosfs_mknod }, /* mknod */ 2015 { &vop_open_desc, (vop_t *)msdosfs_open }, /* open */ 2016 { &vop_close_desc, (vop_t *)msdosfs_close }, /* close */ 2017 { &vop_access_desc, (vop_t *)msdosfs_access }, /* access */ 2018 { &vop_getattr_desc, (vop_t *)msdosfs_getattr }, /* getattr */ 2019 { &vop_setattr_desc, (vop_t *)msdosfs_setattr }, /* setattr */ 2020 { &vop_read_desc, (vop_t *)msdosfs_read }, /* read */ 2021 { &vop_write_desc, (vop_t *)msdosfs_write }, /* write */ 2022 { &vop_ioctl_desc, (vop_t *)msdosfs_ioctl }, /* ioctl */ 2023 { &vop_select_desc, (vop_t *)msdosfs_select }, /* select */ 2024 { &vop_mmap_desc, (vop_t *)msdosfs_mmap }, /* mmap */ 2025 { &vop_fsync_desc, (vop_t *)msdosfs_fsync }, /* fsync */ 2026 { &vop_seek_desc, (vop_t *)msdosfs_seek }, /* seek */ 2027 { &vop_remove_desc, (vop_t *)msdosfs_remove }, /* remove */ 2028 { &vop_link_desc, (vop_t *)msdosfs_link }, /* link */ 2029 { &vop_rename_desc, (vop_t *)msdosfs_rename }, /* rename */ 2030 { &vop_mkdir_desc, (vop_t *)msdosfs_mkdir }, /* mkdir */ 2031 { &vop_rmdir_desc, (vop_t *)msdosfs_rmdir }, /* rmdir */ 2032 { &vop_symlink_desc, (vop_t *)msdosfs_symlink }, /* symlink */ 2033 { &vop_readdir_desc, (vop_t *)msdosfs_readdir }, /* readdir */ 2034 { &vop_readlink_desc, (vop_t *)msdosfs_readlink }, /* readlink */ 2035 { &vop_abortop_desc, (vop_t *)msdosfs_abortop }, /* abortop */ 2036 { &vop_inactive_desc, (vop_t *)msdosfs_inactive }, /* inactive */ 2037 { &vop_reclaim_desc, (vop_t *)msdosfs_reclaim }, /* reclaim */ 2038 { &vop_lock_desc, (vop_t *)msdosfs_lock }, /* lock */ 2039 { &vop_unlock_desc, (vop_t *)msdosfs_unlock }, /* unlock */ 2040 { &vop_bmap_desc, (vop_t *)msdosfs_bmap }, /* bmap */ 2041 { &vop_strategy_desc, (vop_t *)msdosfs_strategy }, /* strategy */ 2042 { &vop_print_desc, (vop_t *)msdosfs_print }, /* print */ 2043 { &vop_islocked_desc, (vop_t *)msdosfs_islocked }, /* islocked */ 2044 { &vop_pathconf_desc, (vop_t *)msdosfs_pathconf }, /* pathconf */ 2045 { &vop_advlock_desc, (vop_t *)msdosfs_advlock }, /* advlock */ 2046 { &vop_reallocblks_desc, (vop_t *)msdosfs_reallocblks }, /* reallocblks */ 2047 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 2048 { NULL, NULL } 2049 }; 2050 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 2051 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 2052 2053 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 2054