1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */ 2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.41 2006/08/19 17:27:24 dillon Exp $ */ 3 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 4 5 /*- 6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 8 * All rights reserved. 9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by TooLs GmbH. 22 * 4. The name of TooLs GmbH may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 /* 37 * Written by Paul Popelka (paulp@uts.amdahl.com) 38 * 39 * You can do anything you want with this software, just don't say you wrote 40 * it, and don't remove this notice. 41 * 42 * This software is provided "as is". 43 * 44 * The author supplies this software to be publicly redistributed on the 45 * understanding that the author is not responsible for the correct 46 * functioning of this software in any circumstances and is not liable for 47 * any damages caused by this software. 48 * 49 * October 1992 50 */ 51 52 #include <sys/param.h> 53 #include <sys/systm.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/namei.h> 60 #include <sys/mount.h> 61 #include <sys/unistd.h> 62 #include <sys/vnode.h> 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 #include <vm/vm_zone.h> 70 #include <vm/vnode_pager.h> 71 72 #include <sys/buf2.h> 73 74 #include "bpb.h" 75 #include "direntry.h" 76 #include "denode.h" 77 #include "msdosfsmount.h" 78 #include "fat.h" 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static int msdosfs_create (struct vop_old_create_args *); 86 static int msdosfs_mknod (struct vop_old_mknod_args *); 87 static int msdosfs_open (struct vop_open_args *); 88 static int msdosfs_close (struct vop_close_args *); 89 static int msdosfs_access (struct vop_access_args *); 90 static int msdosfs_getattr (struct vop_getattr_args *); 91 static int msdosfs_setattr (struct vop_setattr_args *); 92 static int msdosfs_read (struct vop_read_args *); 93 static int msdosfs_write (struct vop_write_args *); 94 static int msdosfs_fsync (struct vop_fsync_args *); 95 static int msdosfs_remove (struct vop_old_remove_args *); 96 static int msdosfs_link (struct vop_old_link_args *); 97 static int msdosfs_rename (struct vop_old_rename_args *); 98 static int msdosfs_mkdir (struct vop_old_mkdir_args *); 99 static int msdosfs_rmdir (struct vop_old_rmdir_args *); 100 static int msdosfs_symlink (struct vop_old_symlink_args *); 101 static int msdosfs_readdir (struct vop_readdir_args *); 102 static int msdosfs_bmap (struct vop_bmap_args *); 103 static int msdosfs_strategy (struct vop_strategy_args *); 104 static int msdosfs_print (struct vop_print_args *); 105 static int msdosfs_pathconf (struct vop_pathconf_args *ap); 106 static int msdosfs_getpages (struct vop_getpages_args *); 107 static int msdosfs_putpages (struct vop_putpages_args *); 108 109 /* 110 * Some general notes: 111 * 112 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 113 * read/written using the vnode for the filesystem. Blocks that represent 114 * the contents of a file are read/written using the vnode for the file 115 * (including directories when they are read/written as files). This 116 * presents problems for the dos filesystem because data that should be in 117 * an inode (if dos had them) resides in the directory itself. Since we 118 * must update directory entries without the benefit of having the vnode 119 * for the directory we must use the vnode for the filesystem. This means 120 * that when a directory is actually read/written (via read, write, or 121 * readdir, or seek) we must use the vnode for the filesystem instead of 122 * the vnode for the directory as would happen in ufs. This is to insure we 123 * retreive the correct block from the buffer cache since the hash value is 124 * based upon the vnode address and the desired block number. 125 */ 126 127 /* 128 * Create a regular file. On entry the directory to contain the file being 129 * created is locked. We must release before we return. 130 * 131 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 132 * struct componentname *a_cnp, struct vattr *a_vap) 133 */ 134 static int 135 msdosfs_create(struct vop_old_create_args *ap) 136 { 137 struct componentname *cnp = ap->a_cnp; 138 struct denode ndirent; 139 struct denode *dep; 140 struct denode *pdep = VTODE(ap->a_dvp); 141 struct timespec ts; 142 int error; 143 144 #ifdef MSDOSFS_DEBUG 145 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 146 #endif 147 148 /* 149 * If this is the root directory and there is no space left we 150 * can't do anything. This is because the root directory can not 151 * change size. 152 */ 153 if (pdep->de_StartCluster == MSDOSFSROOT 154 && pdep->de_fndoffset >= pdep->de_FileSize) { 155 error = ENOSPC; 156 goto bad; 157 } 158 159 /* 160 * Create a directory entry for the file, then call createde() to 161 * have it installed. NOTE: DOS files are always executable. We 162 * use the absence of the owner write bit to make the file 163 * readonly. 164 */ 165 bzero(&ndirent, sizeof(ndirent)); 166 error = uniqdosname(pdep, cnp, ndirent.de_Name); 167 if (error) 168 goto bad; 169 170 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 171 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 172 ndirent.de_LowerCase = 0; 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 ndirent.de_pmp = pdep->de_pmp; 178 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 179 getnanotime(&ts); 180 DETIMES(&ndirent, &ts, &ts, &ts); 181 error = createde(&ndirent, pdep, &dep, cnp); 182 if (error) 183 goto bad; 184 *ap->a_vpp = DETOV(dep); 185 return (0); 186 187 bad: 188 return (error); 189 } 190 191 /* 192 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 193 * struct componentname *a_cnp, struct vattr *a_vap) 194 */ 195 static int 196 msdosfs_mknod(struct vop_old_mknod_args *ap) 197 { 198 switch (ap->a_vap->va_type) { 199 case VDIR: 200 return (msdosfs_mkdir((struct vop_old_mkdir_args *)ap)); 201 break; 202 203 case VREG: 204 return (msdosfs_create((struct vop_old_create_args *)ap)); 205 break; 206 207 default: 208 return (EINVAL); 209 } 210 /* NOTREACHED */ 211 } 212 213 /* 214 * msdosfs_open(struct vnode *a_vp) 215 */ 216 static int 217 msdosfs_open(struct vop_open_args *ap) 218 { 219 return(vop_stdopen(ap)); 220 } 221 222 /* 223 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, 224 * struct thread *a_td) 225 */ 226 static int 227 msdosfs_close(struct vop_close_args *ap) 228 { 229 struct vnode *vp = ap->a_vp; 230 struct denode *dep = VTODE(vp); 231 struct timespec ts; 232 233 if (vp->v_usecount > 1) { 234 getnanotime(&ts); 235 if (vp->v_usecount > 1) { 236 DETIMES(dep, &ts, &ts, &ts); 237 } 238 } 239 return (vop_stdclose(ap)); 240 } 241 242 /* 243 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 244 * struct thread *a_td) 245 */ 246 static int 247 msdosfs_access(struct vop_access_args *ap) 248 { 249 struct vnode *vp = ap->a_vp; 250 struct denode *dep = VTODE(ap->a_vp); 251 struct msdosfsmount *pmp = dep->de_pmp; 252 struct ucred *cred = ap->a_cred; 253 mode_t mask, file_mode, mode = ap->a_mode; 254 gid_t *gp; 255 int i; 256 257 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 258 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 259 file_mode &= pmp->pm_mask; 260 261 /* 262 * Disallow write attempts on read-only file systems; 263 * unless the file is a socket, fifo, or a block or 264 * character device resident on the file system. 265 */ 266 if (mode & VWRITE) { 267 switch (vp->v_type) { 268 case VDIR: 269 case VLNK: 270 case VREG: 271 if (vp->v_mount->mnt_flag & MNT_RDONLY) 272 return (EROFS); 273 break; 274 default: 275 break; 276 } 277 } 278 279 /* User id 0 always gets access. */ 280 if (cred->cr_uid == 0) 281 return 0; 282 283 mask = 0; 284 285 /* Otherwise, check the owner. */ 286 if (cred->cr_uid == pmp->pm_uid) { 287 if (mode & VEXEC) 288 mask |= S_IXUSR; 289 if (mode & VREAD) 290 mask |= S_IRUSR; 291 if (mode & VWRITE) 292 mask |= S_IWUSR; 293 return (file_mode & mask) == mask ? 0 : EACCES; 294 } 295 296 /* Otherwise, check the groups. */ 297 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 298 if (pmp->pm_gid == *gp) { 299 if (mode & VEXEC) 300 mask |= S_IXGRP; 301 if (mode & VREAD) 302 mask |= S_IRGRP; 303 if (mode & VWRITE) 304 mask |= S_IWGRP; 305 return (file_mode & mask) == mask ? 0 : EACCES; 306 } 307 308 /* Otherwise, check everyone else. */ 309 if (mode & VEXEC) 310 mask |= S_IXOTH; 311 if (mode & VREAD) 312 mask |= S_IROTH; 313 if (mode & VWRITE) 314 mask |= S_IWOTH; 315 return (file_mode & mask) == mask ? 0 : EACCES; 316 } 317 318 /* 319 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap, 320 * struct ucred *a_cred, struct thread *a_td) 321 */ 322 static int 323 msdosfs_getattr(struct vop_getattr_args *ap) 324 { 325 struct denode *dep = VTODE(ap->a_vp); 326 struct msdosfsmount *pmp = dep->de_pmp; 327 struct vattr *vap = ap->a_vap; 328 mode_t mode; 329 struct timespec ts; 330 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 331 u_long fileid; 332 333 getnanotime(&ts); 334 DETIMES(dep, &ts, &ts, &ts); 335 vap->va_fsid = dev2udev(dep->de_dev); 336 /* 337 * The following computation of the fileid must be the same as that 338 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 339 * doesn't work. 340 */ 341 if (dep->de_Attributes & ATTR_DIRECTORY) { 342 fileid = xcntobn(pmp, dep->de_StartCluster) * dirsperblk; 343 if (dep->de_StartCluster == MSDOSFSROOT) 344 fileid = 1; 345 } else { 346 fileid = xcntobn(pmp, dep->de_dirclust) * dirsperblk; 347 if (dep->de_dirclust == MSDOSFSROOT) 348 fileid = roottobn(pmp, 0) * dirsperblk; 349 fileid += dep->de_diroffset / sizeof(struct direntry); 350 } 351 vap->va_fileid = fileid; 352 if ((dep->de_Attributes & ATTR_READONLY) == 0) 353 mode = S_IRWXU|S_IRWXG|S_IRWXO; 354 else 355 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 356 vap->va_mode = mode & pmp->pm_mask; 357 vap->va_uid = pmp->pm_uid; 358 vap->va_gid = pmp->pm_gid; 359 vap->va_nlink = 1; 360 vap->va_rdev = 0; 361 vap->va_size = dep->de_FileSize; 362 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 363 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 364 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 365 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 366 } else { 367 vap->va_atime = vap->va_mtime; 368 vap->va_ctime = vap->va_mtime; 369 } 370 vap->va_flags = 0; 371 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 372 vap->va_flags |= SF_ARCHIVED; 373 vap->va_gen = 0; 374 vap->va_blocksize = pmp->pm_bpcluster; 375 vap->va_bytes = 376 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 377 vap->va_type = ap->a_vp->v_type; 378 vap->va_filerev = dep->de_modrev; 379 return (0); 380 } 381 382 /* 383 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 384 * struct ucred *a_cred, struct thread *a_td) 385 */ 386 static int 387 msdosfs_setattr(struct vop_setattr_args *ap) 388 { 389 struct vnode *vp = ap->a_vp; 390 struct denode *dep = VTODE(ap->a_vp); 391 struct msdosfsmount *pmp = dep->de_pmp; 392 struct vattr *vap = ap->a_vap; 393 struct ucred *cred = ap->a_cred; 394 int error = 0; 395 396 #ifdef MSDOSFS_DEBUG 397 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 398 ap->a_vp, vap, cred, ap->a_td); 399 #endif 400 401 /* 402 * Check for unsettable attributes. 403 */ 404 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 405 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 406 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 407 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 408 #ifdef MSDOSFS_DEBUG 409 printf("msdosfs_setattr(): returning EINVAL\n"); 410 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 411 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 412 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 413 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 414 printf(" va_uid %x, va_gid %x\n", 415 vap->va_uid, vap->va_gid); 416 #endif 417 return (EINVAL); 418 } 419 if (vap->va_flags != VNOVAL) { 420 if (vp->v_mount->mnt_flag & MNT_RDONLY) 421 return (EROFS); 422 if (cred->cr_uid != pmp->pm_uid && 423 (error = suser_cred(cred, PRISON_ROOT))) 424 return (error); 425 /* 426 * We are very inconsistent about handling unsupported 427 * attributes. We ignored the access time and the 428 * read and execute bits. We were strict for the other 429 * attributes. 430 * 431 * Here we are strict, stricter than ufs in not allowing 432 * users to attempt to set SF_SETTABLE bits or anyone to 433 * set unsupported bits. However, we ignore attempts to 434 * set ATTR_ARCHIVE for directories `cp -pr' from a more 435 * sensible file system attempts it a lot. 436 */ 437 if (cred->cr_uid != 0) { 438 if (vap->va_flags & SF_SETTABLE) 439 return EPERM; 440 } 441 if (vap->va_flags & ~SF_ARCHIVED) 442 return EOPNOTSUPP; 443 if (vap->va_flags & SF_ARCHIVED) 444 dep->de_Attributes &= ~ATTR_ARCHIVE; 445 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 446 dep->de_Attributes |= ATTR_ARCHIVE; 447 dep->de_flag |= DE_MODIFIED; 448 } 449 450 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 451 uid_t uid; 452 gid_t gid; 453 454 if (vp->v_mount->mnt_flag & MNT_RDONLY) 455 return (EROFS); 456 uid = vap->va_uid; 457 if (uid == (uid_t)VNOVAL) 458 uid = pmp->pm_uid; 459 gid = vap->va_gid; 460 if (gid == (gid_t)VNOVAL) 461 gid = pmp->pm_gid; 462 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 463 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 464 (error = suser_cred(cred, PRISON_ROOT))) 465 return error; 466 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 467 return EINVAL; 468 } 469 470 if (vap->va_size != VNOVAL) { 471 /* 472 * Disallow write attempts on read-only file systems; 473 * unless the file is a socket, fifo, or a block or 474 * character device resident on the file system. 475 */ 476 switch (vp->v_type) { 477 case VDIR: 478 return (EISDIR); 479 /* NOT REACHED */ 480 case VLNK: 481 case VREG: 482 if (vp->v_mount->mnt_flag & MNT_RDONLY) 483 return (EROFS); 484 break; 485 default: 486 break; 487 } 488 error = detrunc(dep, vap->va_size, 0); 489 if (error) 490 return error; 491 } 492 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 493 if (vp->v_mount->mnt_flag & MNT_RDONLY) 494 return (EROFS); 495 if (cred->cr_uid != pmp->pm_uid && 496 (error = suser_cred(cred, PRISON_ROOT)) && 497 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 498 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred)))) 499 return (error); 500 if (vp->v_type != VDIR) { 501 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 502 vap->va_atime.tv_sec != VNOVAL) { 503 dep->de_flag &= ~DE_ACCESS; 504 unix2dostime(&vap->va_atime, &dep->de_ADate, 505 NULL, NULL); 506 } 507 if (vap->va_mtime.tv_sec != VNOVAL) { 508 dep->de_flag &= ~DE_UPDATE; 509 unix2dostime(&vap->va_mtime, &dep->de_MDate, 510 &dep->de_MTime, NULL); 511 } 512 dep->de_Attributes |= ATTR_ARCHIVE; 513 dep->de_flag |= DE_MODIFIED; 514 } 515 } 516 /* 517 * DOS files only have the ability to have their writability 518 * attribute set, so we use the owner write bit to set the readonly 519 * attribute. 520 */ 521 if (vap->va_mode != (mode_t)VNOVAL) { 522 if (vp->v_mount->mnt_flag & MNT_RDONLY) 523 return (EROFS); 524 if (cred->cr_uid != pmp->pm_uid && 525 (error = suser_cred(cred, PRISON_ROOT))) 526 return (error); 527 if (vp->v_type != VDIR) { 528 /* We ignore the read and execute bits. */ 529 if (vap->va_mode & VWRITE) 530 dep->de_Attributes &= ~ATTR_READONLY; 531 else 532 dep->de_Attributes |= ATTR_READONLY; 533 dep->de_Attributes |= ATTR_ARCHIVE; 534 dep->de_flag |= DE_MODIFIED; 535 } 536 } 537 return (deupdat(dep, 1)); 538 } 539 540 /* 541 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 542 * struct ucred *a_cred) 543 */ 544 static int 545 msdosfs_read(struct vop_read_args *ap) 546 { 547 int error = 0; 548 int blsize; 549 int isadir; 550 int orig_resid; 551 u_int n; 552 u_long diff; 553 u_long on; 554 daddr_t lbn; 555 daddr_t rablock; 556 off_t raoffset; 557 off_t loffset; 558 int rasize; 559 int seqcount; 560 struct buf *bp; 561 struct vnode *vp = ap->a_vp; 562 struct denode *dep = VTODE(vp); 563 struct msdosfsmount *pmp = dep->de_pmp; 564 struct uio *uio = ap->a_uio; 565 566 if (uio->uio_offset < 0) 567 return (EINVAL); 568 569 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 570 return (0); 571 /* 572 * If they didn't ask for any data, then we are done. 573 */ 574 orig_resid = uio->uio_resid; 575 if (orig_resid <= 0) 576 return (0); 577 578 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 579 580 isadir = dep->de_Attributes & ATTR_DIRECTORY; 581 do { 582 if (uio->uio_offset >= dep->de_FileSize) 583 break; 584 585 /* 586 * note: lbn is a cluster number, not a device block number. 587 */ 588 lbn = de_off2cn(pmp, uio->uio_offset); 589 loffset = de_cn2doff(pmp, lbn); 590 591 /* 592 * If we are operating on a directory file then be sure to 593 * do i/o with the vnode for the filesystem instead of the 594 * vnode for the directory. 595 */ 596 if (isadir) { 597 /* 598 * convert cluster # to block #. lbn is a 599 * device block number after this. 600 */ 601 error = pcbmap(dep, lbn, &lbn, NULL, &blsize); 602 loffset = de_bntodoff(pmp, lbn); 603 if (error == E2BIG) { 604 error = EINVAL; 605 break; 606 } else if (error) 607 break; 608 error = bread(pmp->pm_devvp, loffset, blsize, &bp); 609 } else { 610 blsize = pmp->pm_bpcluster; 611 rablock = lbn + 1; 612 raoffset = de_cn2doff(pmp, rablock); 613 if (seqcount > 1 && 614 raoffset < dep->de_FileSize) { 615 rasize = pmp->pm_bpcluster; 616 error = breadn(vp, loffset, blsize, 617 &raoffset, &rasize, 1, &bp); 618 } else { 619 error = bread(vp, loffset, blsize, &bp); 620 } 621 } 622 if (error) { 623 brelse(bp); 624 break; 625 } 626 on = uio->uio_offset & pmp->pm_crbomask; 627 diff = pmp->pm_bpcluster - on; 628 n = diff > uio->uio_resid ? uio->uio_resid : diff; 629 diff = dep->de_FileSize - uio->uio_offset; 630 if (diff < n) 631 n = diff; 632 diff = blsize - bp->b_resid; 633 if (diff < n) 634 n = diff; 635 error = uiomove(bp->b_data + on, (int) n, uio); 636 brelse(bp); 637 } while (error == 0 && uio->uio_resid > 0 && n != 0); 638 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 639 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 640 dep->de_flag |= DE_ACCESS; 641 return (error); 642 } 643 644 /* 645 * Write data to a file or directory. 646 * 647 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 648 * struct ucred *a_cred) 649 */ 650 static int 651 msdosfs_write(struct vop_write_args *ap) 652 { 653 int n; 654 int croffset; 655 int resid; 656 u_long osize; 657 int error = 0; 658 u_long count; 659 daddr_t cn, lastcn; 660 struct buf *bp; 661 int ioflag = ap->a_ioflag; 662 struct uio *uio = ap->a_uio; 663 struct thread *td = uio->uio_td; 664 struct vnode *vp = ap->a_vp; 665 struct vnode *thisvp; 666 struct denode *dep = VTODE(vp); 667 struct msdosfsmount *pmp = dep->de_pmp; 668 struct proc *p = (td ? td->td_proc : NULL); 669 670 #ifdef MSDOSFS_DEBUG 671 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 672 vp, uio, ioflag, cred); 673 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 674 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 675 #endif 676 677 switch (vp->v_type) { 678 case VREG: 679 if (ioflag & IO_APPEND) 680 uio->uio_offset = dep->de_FileSize; 681 thisvp = vp; 682 break; 683 case VDIR: 684 return EISDIR; 685 default: 686 panic("msdosfs_write(): bad file type"); 687 } 688 689 if (uio->uio_offset < 0) 690 return (EFBIG); 691 692 if (uio->uio_resid == 0) 693 return (0); 694 695 /* 696 * If they've exceeded their filesize limit, tell them about it. 697 */ 698 if (p && 699 ((uoff_t)uio->uio_offset + uio->uio_resid > 700 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 701 psignal(p, SIGXFSZ); 702 return (EFBIG); 703 } 704 705 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 706 return (EFBIG); 707 708 /* 709 * If the offset we are starting the write at is beyond the end of 710 * the file, then they've done a seek. Unix filesystems allow 711 * files with holes in them, DOS doesn't so we must fill the hole 712 * with zeroed blocks. 713 */ 714 if (uio->uio_offset > dep->de_FileSize) { 715 error = deextend(dep, uio->uio_offset); 716 if (error) 717 return (error); 718 } 719 720 /* 721 * Remember some values in case the write fails. 722 */ 723 resid = uio->uio_resid; 724 osize = dep->de_FileSize; 725 726 /* 727 * If we write beyond the end of the file, extend it to its ultimate 728 * size ahead of the time to hopefully get a contiguous area. 729 */ 730 if (uio->uio_offset + resid > osize) { 731 count = de_clcount(pmp, uio->uio_offset + resid) - 732 de_clcount(pmp, osize); 733 error = extendfile(dep, count, NULL, NULL, 0); 734 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 735 goto errexit; 736 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 737 } else 738 lastcn = de_clcount(pmp, osize) - 1; 739 740 do { 741 if (de_off2cn(pmp, uio->uio_offset) > lastcn) { 742 error = ENOSPC; 743 break; 744 } 745 746 croffset = uio->uio_offset & pmp->pm_crbomask; 747 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 748 if (uio->uio_offset + n > dep->de_FileSize) { 749 dep->de_FileSize = uio->uio_offset + n; 750 /* The object size needs to be set before buffer is allocated */ 751 vnode_pager_setsize(vp, dep->de_FileSize); 752 } 753 754 cn = de_off2cn(pmp, uio->uio_offset); 755 if ((uio->uio_offset & pmp->pm_crbomask) == 0 756 && (de_off2cn(pmp, uio->uio_offset + uio->uio_resid) 757 > de_off2cn(pmp, uio->uio_offset) 758 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 759 /* 760 * If either the whole cluster gets written, 761 * or we write the cluster from its start beyond EOF, 762 * then no need to read data from disk. 763 */ 764 bp = getblk(thisvp, de_cn2doff(pmp, cn), 765 pmp->pm_bpcluster, 0, 0); 766 clrbuf(bp); 767 /* 768 * Do the bmap now, since pcbmap needs buffers 769 * for the fat table. (see msdosfs_strategy) 770 */ 771 if (bp->b_bio2.bio_offset == NOOFFSET) { 772 daddr_t lblkno = de_off2cn(pmp, bp->b_loffset); 773 daddr_t dblkno; 774 775 error = pcbmap(dep, lblkno, 776 &dblkno, NULL, NULL); 777 if (error || dblkno == (daddr_t)-1) { 778 bp->b_bio2.bio_offset = NOOFFSET; 779 } else { 780 bp->b_bio2.bio_offset = de_bntodoff(pmp, dblkno); 781 } 782 } 783 if (bp->b_bio2.bio_offset == NOOFFSET) { 784 brelse(bp); 785 if (!error) 786 error = EIO; /* XXX */ 787 break; 788 } 789 } else { 790 /* 791 * The block we need to write into exists, so read 792 * it in. 793 */ 794 error = bread(thisvp, de_cn2doff(pmp, cn), 795 pmp->pm_bpcluster, &bp); 796 if (error) { 797 brelse(bp); 798 break; 799 } 800 } 801 802 /* 803 * Should these vnode_pager_* functions be done on dir 804 * files? 805 */ 806 807 /* 808 * Copy the data from user space into the buf header. 809 */ 810 error = uiomove(bp->b_data + croffset, n, uio); 811 if (error) { 812 brelse(bp); 813 break; 814 } 815 816 /* 817 * If they want this synchronous then write it and wait for 818 * it. Otherwise, if on a cluster boundary write it 819 * asynchronously so we can move on to the next block 820 * without delay. Otherwise do a delayed write because we 821 * may want to write somemore into the block later. 822 */ 823 if (ioflag & IO_SYNC) 824 bwrite(bp); 825 else if (n + croffset == pmp->pm_bpcluster) 826 bawrite(bp); 827 else 828 bdwrite(bp); 829 dep->de_flag |= DE_UPDATE; 830 } while (error == 0 && uio->uio_resid > 0); 831 832 /* 833 * If the write failed and they want us to, truncate the file back 834 * to the size it was before the write was attempted. 835 */ 836 errexit: 837 if (error) { 838 if (ioflag & IO_UNIT) { 839 detrunc(dep, osize, ioflag & IO_SYNC); 840 uio->uio_offset -= resid - uio->uio_resid; 841 uio->uio_resid = resid; 842 } else { 843 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC); 844 if (uio->uio_resid != resid) 845 error = 0; 846 } 847 } else if (ioflag & IO_SYNC) 848 error = deupdat(dep, 1); 849 return (error); 850 } 851 852 /* 853 * Flush the blocks of a file to disk. 854 * 855 * This function is worthless for vnodes that represent directories. Maybe we 856 * could just do a sync if they try an fsync on a directory file. 857 * 858 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 859 * struct thread *a_td) 860 */ 861 static int 862 msdosfs_fsync(struct vop_fsync_args *ap) 863 { 864 struct vnode *vp = ap->a_vp; 865 866 /* 867 * Flush all dirty buffers associated with a vnode. 868 */ 869 #ifdef DIAGNOSTIC 870 loop: 871 #endif 872 vfsync(vp, ap->a_waitfor, 0, NULL, NULL); 873 #ifdef DIAGNOSTIC 874 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 875 vprint("msdosfs_fsync: dirty", vp); 876 goto loop; 877 } 878 #endif 879 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 880 } 881 882 /* 883 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 884 * struct componentname *a_cnp) 885 */ 886 static int 887 msdosfs_remove(struct vop_old_remove_args *ap) 888 { 889 struct denode *dep = VTODE(ap->a_vp); 890 struct denode *ddep = VTODE(ap->a_dvp); 891 int error; 892 893 if (ap->a_vp->v_type == VDIR) 894 error = EPERM; 895 else 896 error = removede(ddep, dep); 897 #ifdef MSDOSFS_DEBUG 898 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 899 #endif 900 return (error); 901 } 902 903 /* 904 * DOS filesystems don't know what links are. But since we already called 905 * msdosfs_lookup() with create and lockparent, the parent is locked so we 906 * have to free it before we return the error. 907 * 908 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 909 * struct componentname *a_cnp) 910 */ 911 static int 912 msdosfs_link(struct vop_old_link_args *ap) 913 { 914 return (EOPNOTSUPP); 915 } 916 917 /* 918 * Renames on files require moving the denode to a new hash queue since the 919 * denode's location is used to compute which hash queue to put the file 920 * in. Unless it is a rename in place. For example "mv a b". 921 * 922 * What follows is the basic algorithm: 923 * 924 * if (file move) { 925 * if (dest file exists) { 926 * remove dest file 927 * } 928 * if (dest and src in same directory) { 929 * rewrite name in existing directory slot 930 * } else { 931 * write new entry in dest directory 932 * update offset and dirclust in denode 933 * move denode to new hash chain 934 * clear old directory entry 935 * } 936 * } else { 937 * directory move 938 * if (dest directory exists) { 939 * if (dest is not empty) { 940 * return ENOTEMPTY 941 * } 942 * remove dest directory 943 * } 944 * if (dest and src in same directory) { 945 * rewrite name in existing entry 946 * } else { 947 * be sure dest is not a child of src directory 948 * write entry in dest directory 949 * update "." and ".." in moved directory 950 * clear old directory entry for moved directory 951 * } 952 * } 953 * 954 * On entry: 955 * source's parent directory is unlocked 956 * source file or directory is unlocked 957 * destination's parent directory is locked 958 * destination file or directory is locked if it exists 959 * 960 * On exit: 961 * all denodes should be released 962 * 963 * Notes: 964 * I'm not sure how the memory containing the pathnames pointed at by the 965 * componentname structures is freed, there may be some memory bleeding 966 * for each rename done. 967 * 968 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 969 * struct componentname *a_fcnp, struct vnode *a_tdvp, 970 * struct vnode *a_tvp, struct componentname *a_tcnp) 971 */ 972 static int 973 msdosfs_rename(struct vop_old_rename_args *ap) 974 { 975 struct vnode *tdvp = ap->a_tdvp; 976 struct vnode *fvp = ap->a_fvp; 977 struct vnode *fdvp = ap->a_fdvp; 978 struct vnode *tvp = ap->a_tvp; 979 struct componentname *tcnp = ap->a_tcnp; 980 struct componentname *fcnp = ap->a_fcnp; 981 struct denode *ip, *xp, *dp, *zp; 982 u_char toname[11], oldname[11]; 983 u_long from_diroffset, to_diroffset; 984 u_char to_count; 985 int doingdirectory = 0, newparent = 0; 986 int error; 987 u_long cn; 988 daddr_t bn; 989 struct denode *fddep; /* from file's parent directory */ 990 struct msdosfsmount *pmp; 991 struct direntry *dotdotp; 992 struct buf *bp; 993 994 fddep = VTODE(ap->a_fdvp); 995 pmp = fddep->de_pmp; 996 997 pmp = VFSTOMSDOSFS(fdvp->v_mount); 998 999 /* 1000 * Check for cross-device rename. 1001 */ 1002 if ((fvp->v_mount != tdvp->v_mount) || 1003 (tvp && (fvp->v_mount != tvp->v_mount))) { 1004 error = EXDEV; 1005 abortit: 1006 if (tdvp == tvp) 1007 vrele(tdvp); 1008 else 1009 vput(tdvp); 1010 if (tvp) 1011 vput(tvp); 1012 vrele(fdvp); 1013 vrele(fvp); 1014 return (error); 1015 } 1016 1017 /* 1018 * If source and dest are the same, do nothing. 1019 */ 1020 if (tvp == fvp) { 1021 error = 0; 1022 goto abortit; 1023 } 1024 1025 /* 1026 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note 1027 * that we have to unlock it to use the abortit target. 1028 */ 1029 error = vn_lock(fvp, LK_EXCLUSIVE); 1030 if (error) 1031 goto abortit; 1032 dp = VTODE(fdvp); 1033 ip = VTODE(fvp); 1034 1035 /* 1036 * Be sure we are not renaming ".", "..", or an alias of ".". This 1037 * leads to a crippled directory tree. It's pretty tough to do a 1038 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1039 * doesn't work if the ".." entry is missing. 1040 */ 1041 if (ip->de_Attributes & ATTR_DIRECTORY) { 1042 /* 1043 * Avoid ".", "..", and aliases of "." for obvious reasons. 1044 */ 1045 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1046 dp == ip || 1047 (fcnp->cn_flags & CNP_ISDOTDOT) || 1048 (tcnp->cn_flags & CNP_ISDOTDOT) || 1049 (ip->de_flag & DE_RENAME)) { 1050 vn_unlock(fvp); 1051 error = EINVAL; 1052 goto abortit; 1053 } 1054 ip->de_flag |= DE_RENAME; 1055 doingdirectory++; 1056 } 1057 1058 /* 1059 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only 1060 * set if doingdirectory. We will get fvp unlocked in fairly 1061 * short order. dp and xp must be setup and fvp must be unlocked 1062 * for the out and bad targets to work properly. 1063 */ 1064 dp = VTODE(tdvp); 1065 xp = tvp ? VTODE(tvp) : NULL; 1066 1067 /* 1068 * Remember direntry place to use for destination 1069 */ 1070 to_diroffset = dp->de_fndoffset; 1071 to_count = dp->de_fndcnt; 1072 1073 /* 1074 * If ".." must be changed (ie the directory gets a new 1075 * parent) then the source directory must not be in the 1076 * directory heirarchy above the target, as this would 1077 * orphan everything below the source directory. Also 1078 * the user must have write permission in the source so 1079 * as to be able to change "..". We must repeat the call 1080 * to namei, as the parent directory is unlocked by the 1081 * call to doscheckpath(). 1082 */ 1083 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 1084 vn_unlock(fvp); 1085 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1086 newparent = 1; 1087 1088 /* 1089 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL. 1090 * DE_RENAME only set if doingdirectory. 1091 */ 1092 if (doingdirectory && newparent) { 1093 if (error) /* write access check above */ 1094 goto bad; 1095 if (xp != NULL) { 1096 vput(tvp); 1097 xp = NULL; 1098 } 1099 /* 1100 * checkpath vput's tdvp (VTOI(dp)) on return no matter what, 1101 * get an extra ref so we wind up with just an unlocked, ref'd 1102 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp 1103 * isn't locked so we can't use the out target). 1104 */ 1105 vref(tdvp); 1106 error = doscheckpath(ip, dp); 1107 tcnp->cn_flags |= CNP_PDIRUNLOCK; 1108 if (error) { 1109 vrele(tdvp); 1110 goto out; 1111 } 1112 /* 1113 * relookup no longer messes with the ref count. tdvp must 1114 * be unlocked on entry and on success will be locked on 1115 * return. 1116 */ 1117 error = relookup(tdvp, &tvp, tcnp); 1118 if (error) { 1119 if (tcnp->cn_flags & CNP_PDIRUNLOCK) 1120 vrele(tdvp); 1121 else 1122 vput(tdvp); 1123 goto out; 1124 } 1125 1126 /* 1127 * tvp and tdvp are now locked again. 1128 */ 1129 dp = VTODE(tdvp); 1130 xp = tvp ? VTODE(tvp) : NULL; 1131 } 1132 1133 /* 1134 * tvp and tdvp are now locked again, the 'bad' target can be used 1135 * to clean them up again. Delete an existant target and clean 1136 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up. 1137 */ 1138 if (xp != NULL) { 1139 /* 1140 * Target must be empty if a directory and have no links 1141 * to it. Also, ensure source and target are compatible 1142 * (both directories, or both not directories). 1143 */ 1144 if (xp->de_Attributes & ATTR_DIRECTORY) { 1145 if (!dosdirempty(xp)) { 1146 error = ENOTEMPTY; 1147 goto bad; 1148 } 1149 if (!doingdirectory) { 1150 error = ENOTDIR; 1151 goto bad; 1152 } 1153 } else if (doingdirectory) { 1154 error = EISDIR; 1155 goto bad; 1156 } 1157 error = removede(dp, xp); 1158 if (error) 1159 goto bad; 1160 vput(tvp); 1161 xp = NULL; 1162 tvp = NULL; 1163 } 1164 1165 /* 1166 * Convert the filename in tcnp into a dos filename. We copy this 1167 * into the denode and directory entry for the destination 1168 * file/directory. 1169 */ 1170 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1171 if (error) 1172 goto bad; 1173 1174 /* 1175 * Since from wasn't locked at various places above, we have to do 1176 * a relookup here. If the target and source are the same directory 1177 * we have to unlock the target directory in order to safely relookup 1178 * the source, because relookup expects its directory to be unlocked. 1179 * 1180 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must 1181 * now take that into account. 1182 * 1183 * The tdvp locking issues make this a real mess. 1184 */ 1185 fcnp->cn_flags &= ~CNP_MODMASK; 1186 fcnp->cn_flags |= CNP_LOCKPARENT; 1187 if (newparent == 0) 1188 vn_unlock(tdvp); 1189 error = relookup(fdvp, &fvp, fcnp); 1190 if (error || fvp == NULL) { 1191 /* 1192 * From name has disappeared. Note: fdvp might == tdvp. 1193 * 1194 * DE_RENAME is only set if doingdirectory. 1195 */ 1196 if (doingdirectory) 1197 panic("rename: lost dir entry"); 1198 if (fcnp->cn_flags & CNP_PDIRUNLOCK) 1199 vrele(fdvp); 1200 else 1201 vput(fdvp); 1202 if (newparent == 0) 1203 vrele(tdvp); 1204 else 1205 vput(tdvp); 1206 vrele(ap->a_fvp); 1207 return(0); 1208 } 1209 1210 /* 1211 * No error occured. tdvp, fdvp and fvp are all locked. If 1212 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned 1213 * up. ap->a_fvp is still refd. 1214 */ 1215 xp = VTODE(fvp); 1216 zp = VTODE(fdvp); 1217 from_diroffset = zp->de_fndoffset; 1218 1219 /* 1220 * Ensure that the directory entry still exists and has not 1221 * changed till now. If the source is a file the entry may 1222 * have been unlinked or renamed. In either case there is 1223 * no further work to be done. If the source is a directory 1224 * then it cannot have been rmdir'ed or renamed; this is 1225 * prohibited by the DE_RENAME flag. 1226 * 1227 * DE_RENAME is only set if doingdirectory. 1228 */ 1229 if (xp != ip) { 1230 if (doingdirectory) 1231 panic("rename: lost dir entry"); 1232 goto done; 1233 } else { 1234 u_long new_dirclust; 1235 u_long new_diroffset; 1236 1237 /* 1238 * First write a new entry in the destination 1239 * directory and mark the entry in the source directory 1240 * as deleted. Then move the denode to the correct hash 1241 * chain for its new location in the filesystem. And, if 1242 * we moved a directory, then update its .. entry to point 1243 * to the new parent directory. 1244 */ 1245 bcopy(ip->de_Name, oldname, 11); 1246 bcopy(toname, ip->de_Name, 11); /* update denode */ 1247 dp->de_fndoffset = to_diroffset; 1248 dp->de_fndcnt = to_count; 1249 error = createde(ip, dp, (struct denode **)0, tcnp); 1250 if (error) { 1251 bcopy(oldname, ip->de_Name, 11); 1252 goto done; 1253 } 1254 ip->de_refcnt++; 1255 zp->de_fndoffset = from_diroffset; 1256 error = removede(zp, ip); 1257 if (error) { 1258 /* XXX should really panic here, fs is corrupt */ 1259 goto done; 1260 } 1261 if (!doingdirectory) { 1262 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 1263 NULL, &new_dirclust, NULL); 1264 if (error) { 1265 /* XXX should really panic here, fs is corrupt */ 1266 goto done; 1267 } 1268 if (new_dirclust == MSDOSFSROOT) 1269 new_diroffset = to_diroffset; 1270 else 1271 new_diroffset = to_diroffset & pmp->pm_crbomask; 1272 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1273 } 1274 } 1275 1276 /* 1277 * If we moved a directory to a new parent directory, then we must 1278 * fixup the ".." entry in the moved directory. 1279 */ 1280 if (doingdirectory && newparent) { 1281 cn = ip->de_StartCluster; 1282 if (cn == MSDOSFSROOT) { 1283 /* this should never happen */ 1284 panic("msdosfs_rename(): updating .. in root directory?"); 1285 } else { 1286 bn = xcntobn(pmp, cn); 1287 } 1288 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), pmp->pm_bpcluster, &bp); 1289 if (error) { 1290 /* XXX should really panic here, fs is corrupt */ 1291 brelse(bp); 1292 goto done; 1293 } 1294 dotdotp = (struct direntry *)bp->b_data + 1; 1295 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1296 if (FAT32(pmp)) 1297 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1298 error = bwrite(bp); 1299 if (error) { 1300 /* XXX should really panic here, fs is corrupt */ 1301 goto done; 1302 } 1303 } 1304 1305 /* 1306 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd 1307 */ 1308 done: 1309 if (doingdirectory) 1310 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */ 1311 vput(fvp); 1312 if (newparent) 1313 vput(fdvp); 1314 else 1315 vrele(fdvp); 1316 vput(tdvp); 1317 vrele(ap->a_fvp); 1318 return (error); 1319 1320 /* 1321 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp 1322 * are not locked. ip points to fvp's inode which may have DE_RENAME 1323 * set. 1324 */ 1325 bad: 1326 if (xp) 1327 vput(tvp); 1328 vput(tdvp); 1329 out: 1330 /* 1331 * 'out' target: tvp and tdvp have already been cleaned up. 1332 */ 1333 if (doingdirectory) 1334 ip->de_flag &= ~DE_RENAME; 1335 vrele(fdvp); 1336 vrele(fvp); 1337 return (error); 1338 1339 } 1340 1341 static struct { 1342 struct direntry dot; 1343 struct direntry dotdot; 1344 } dosdirtemplate = { 1345 { ". ", " ", /* the . entry */ 1346 ATTR_DIRECTORY, /* file attribute */ 1347 0, /* reserved */ 1348 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1349 { 0, 0 }, /* access date */ 1350 { 0, 0 }, /* high bits of start cluster */ 1351 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1352 { 0, 0 }, /* startcluster */ 1353 { 0, 0, 0, 0 } /* filesize */ 1354 }, 1355 { ".. ", " ", /* the .. entry */ 1356 ATTR_DIRECTORY, /* file attribute */ 1357 0, /* reserved */ 1358 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1359 { 0, 0 }, /* access date */ 1360 { 0, 0 }, /* high bits of start cluster */ 1361 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1362 { 0, 0 }, /* startcluster */ 1363 { 0, 0, 0, 0 } /* filesize */ 1364 } 1365 }; 1366 1367 /* 1368 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1369 * struct componentname *a_cnp, struct vattr *a_vap) 1370 */ 1371 static int 1372 msdosfs_mkdir(struct vop_old_mkdir_args *ap) 1373 { 1374 struct componentname *cnp = ap->a_cnp; 1375 struct denode *dep; 1376 struct denode *pdep = VTODE(ap->a_dvp); 1377 struct direntry *denp; 1378 struct msdosfsmount *pmp = pdep->de_pmp; 1379 struct buf *bp; 1380 u_long newcluster, pcl; 1381 int bn; 1382 int error; 1383 struct denode ndirent; 1384 struct timespec ts; 1385 1386 /* 1387 * If this is the root directory and there is no space left we 1388 * can't do anything. This is because the root directory can not 1389 * change size. 1390 */ 1391 if (pdep->de_StartCluster == MSDOSFSROOT 1392 && pdep->de_fndoffset >= pdep->de_FileSize) { 1393 error = ENOSPC; 1394 goto bad2; 1395 } 1396 1397 /* 1398 * Allocate a cluster to hold the about to be created directory. 1399 */ 1400 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1401 if (error) 1402 goto bad2; 1403 1404 bzero(&ndirent, sizeof(ndirent)); 1405 ndirent.de_pmp = pmp; 1406 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1407 getnanotime(&ts); 1408 DETIMES(&ndirent, &ts, &ts, &ts); 1409 1410 /* 1411 * Now fill the cluster with the "." and ".." entries. And write 1412 * the cluster to disk. This way it is there for the parent 1413 * directory to be pointing at if there were a crash. 1414 */ 1415 bn = xcntobn(pmp, newcluster); 1416 /* always succeeds */ 1417 bp = getblk(pmp->pm_devvp, de_bntodoff(pmp, bn), 1418 pmp->pm_bpcluster, 0, 0); 1419 bzero(bp->b_data, pmp->pm_bpcluster); 1420 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1421 denp = (struct direntry *)bp->b_data; 1422 putushort(denp[0].deStartCluster, newcluster); 1423 putushort(denp[0].deCDate, ndirent.de_CDate); 1424 putushort(denp[0].deCTime, ndirent.de_CTime); 1425 denp[0].deCHundredth = ndirent.de_CHun; 1426 putushort(denp[0].deADate, ndirent.de_ADate); 1427 putushort(denp[0].deMDate, ndirent.de_MDate); 1428 putushort(denp[0].deMTime, ndirent.de_MTime); 1429 pcl = pdep->de_StartCluster; 1430 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1431 pcl = 0; 1432 putushort(denp[1].deStartCluster, pcl); 1433 putushort(denp[1].deCDate, ndirent.de_CDate); 1434 putushort(denp[1].deCTime, ndirent.de_CTime); 1435 denp[1].deCHundredth = ndirent.de_CHun; 1436 putushort(denp[1].deADate, ndirent.de_ADate); 1437 putushort(denp[1].deMDate, ndirent.de_MDate); 1438 putushort(denp[1].deMTime, ndirent.de_MTime); 1439 if (FAT32(pmp)) { 1440 putushort(denp[0].deHighClust, newcluster >> 16); 1441 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1442 } 1443 1444 error = bwrite(bp); 1445 if (error) 1446 goto bad; 1447 1448 /* 1449 * Now build up a directory entry pointing to the newly allocated 1450 * cluster. This will be written to an empty slot in the parent 1451 * directory. 1452 */ 1453 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1454 if (error) 1455 goto bad; 1456 1457 ndirent.de_Attributes = ATTR_DIRECTORY; 1458 ndirent.de_LowerCase = 0; 1459 ndirent.de_StartCluster = newcluster; 1460 ndirent.de_FileSize = 0; 1461 ndirent.de_dev = pdep->de_dev; 1462 ndirent.de_devvp = pdep->de_devvp; 1463 error = createde(&ndirent, pdep, &dep, cnp); 1464 if (error) 1465 goto bad; 1466 *ap->a_vpp = DETOV(dep); 1467 return (0); 1468 1469 bad: 1470 clusterfree(pmp, newcluster, NULL); 1471 bad2: 1472 return (error); 1473 } 1474 1475 /* 1476 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1477 * struct componentname *a_cnp) 1478 */ 1479 static int 1480 msdosfs_rmdir(struct vop_old_rmdir_args *ap) 1481 { 1482 struct vnode *vp = ap->a_vp; 1483 struct vnode *dvp = ap->a_dvp; 1484 struct denode *ip, *dp; 1485 int error; 1486 1487 ip = VTODE(vp); 1488 dp = VTODE(dvp); 1489 1490 /* 1491 * Verify the directory is empty (and valid). 1492 * (Rmdir ".." won't be valid since 1493 * ".." will contain a reference to 1494 * the current directory and thus be 1495 * non-empty.) 1496 */ 1497 error = 0; 1498 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1499 error = ENOTEMPTY; 1500 goto out; 1501 } 1502 /* 1503 * Delete the entry from the directory. For dos filesystems this 1504 * gets rid of the directory entry on disk, the in memory copy 1505 * still exists but the de_refcnt is <= 0. This prevents it from 1506 * being found by deget(). When the vput() on dep is done we give 1507 * up access and eventually msdosfs_reclaim() will be called which 1508 * will remove it from the denode cache. 1509 */ 1510 error = removede(dp, ip); 1511 if (error) 1512 goto out; 1513 /* 1514 * This is where we decrement the link count in the parent 1515 * directory. Since dos filesystems don't do this we just purge 1516 * the name cache. 1517 */ 1518 vn_unlock(dvp); 1519 /* 1520 * Truncate the directory that is being deleted. 1521 */ 1522 error = detrunc(ip, (u_long)0, IO_SYNC); 1523 1524 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1525 out: 1526 return (error); 1527 } 1528 1529 /* 1530 * DOS filesystems don't know what symlinks are. 1531 * 1532 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1533 * struct componentname *a_cnp, struct vattr *a_vap, 1534 * char *a_target) 1535 */ 1536 static int 1537 msdosfs_symlink(struct vop_old_symlink_args *ap) 1538 { 1539 return (EOPNOTSUPP); 1540 } 1541 1542 /* 1543 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1544 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1545 * u_long **a_cookies) 1546 */ 1547 static int 1548 msdosfs_readdir(struct vop_readdir_args *ap) 1549 { 1550 int error = 0; 1551 int diff; 1552 long n; 1553 int blsize; 1554 long on; 1555 u_long cn; 1556 u_long dirsperblk; 1557 long bias = 0; 1558 daddr_t bn, lbn; 1559 struct buf *bp; 1560 struct denode *dep; 1561 struct msdosfsmount *pmp; 1562 struct direntry *dentp; 1563 struct uio *uio = ap->a_uio; 1564 u_long *cookies = NULL; 1565 int ncookies = 0; 1566 off_t offset, off; 1567 int chksum = -1; 1568 ino_t d_ino; 1569 uint16_t d_namlen; 1570 uint8_t d_type; 1571 char *d_name_storage = NULL; 1572 char *d_name; 1573 1574 if ((error = vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 1575 return (error); 1576 1577 dep = VTODE(ap->a_vp); 1578 pmp = dep->de_pmp; 1579 1580 #ifdef MSDOSFS_DEBUG 1581 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1582 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1583 #endif 1584 1585 /* 1586 * msdosfs_readdir() won't operate properly on regular files since 1587 * it does i/o only with the the filesystem vnode, and hence can 1588 * retrieve the wrong block from the buffer cache for a plain file. 1589 * So, fail attempts to readdir() on a plain file. 1590 */ 1591 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) { 1592 error = ENOTDIR; 1593 goto done; 1594 } 1595 1596 /* 1597 * If the user buffer is smaller than the size of one dos directory 1598 * entry or the file offset is not a multiple of the size of a 1599 * directory entry, then we fail the read. 1600 */ 1601 off = offset = uio->uio_offset; 1602 if (uio->uio_resid < sizeof(struct direntry) || 1603 (offset & (sizeof(struct direntry) - 1))) { 1604 error = EINVAL; 1605 goto done; 1606 } 1607 1608 if (ap->a_ncookies) { 1609 ncookies = uio->uio_resid / 16 + 1; 1610 if (ncookies > 1024) 1611 ncookies = 1024; 1612 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1613 M_WAITOK); 1614 *ap->a_cookies = cookies; 1615 *ap->a_ncookies = ncookies; 1616 } 1617 1618 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1619 1620 /* 1621 * If they are reading from the root directory then, we simulate 1622 * the . and .. entries since these don't exist in the root 1623 * directory. We also set the offset bias to make up for having to 1624 * simulate these entries. By this I mean that at file offset 64 we 1625 * read the first entry in the root directory that lives on disk. 1626 */ 1627 if (dep->de_StartCluster == MSDOSFSROOT 1628 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1629 #if 0 1630 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1631 offset); 1632 #endif 1633 bias = 2 * sizeof(struct direntry); 1634 if (offset < bias) { 1635 for (n = (int)offset / sizeof(struct direntry); n < 2; 1636 n++) { 1637 if (FAT32(pmp)) 1638 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1639 * dirsperblk; 1640 else 1641 d_ino = 1; 1642 d_type = DT_DIR; 1643 if (n == 0) { 1644 d_namlen = 1; 1645 d_name = "."; 1646 } else /* if (n == 1) */{ 1647 d_namlen = 2; 1648 d_name = ".."; 1649 } 1650 if (vop_write_dirent(&error, uio, d_ino, d_type, 1651 d_namlen, d_name)) 1652 goto out; 1653 if (error) 1654 goto out; 1655 offset += sizeof(struct direntry); 1656 off = offset; 1657 if (cookies) { 1658 *cookies++ = offset; 1659 if (--ncookies <= 0) 1660 goto out; 1661 } 1662 } 1663 } 1664 } 1665 1666 d_name_storage = malloc(WIN_MAXLEN, M_TEMP, M_WAITOK); 1667 off = offset; 1668 1669 while (uio->uio_resid > 0) { 1670 lbn = de_off2cn(pmp, offset - bias); 1671 on = (offset - bias) & pmp->pm_crbomask; 1672 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1673 diff = dep->de_FileSize - (offset - bias); 1674 if (diff <= 0) 1675 break; 1676 n = min(n, diff); 1677 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1678 if (error) 1679 break; 1680 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), blsize, &bp); 1681 if (error) { 1682 brelse(bp); 1683 free(d_name_storage, M_TEMP); 1684 goto done; 1685 } 1686 n = min(n, blsize - bp->b_resid); 1687 1688 /* 1689 * Convert from dos directory entries to fs-independent 1690 * directory entries. 1691 */ 1692 for (dentp = (struct direntry *)(bp->b_data + on); 1693 (char *)dentp < bp->b_data + on + n; 1694 dentp++, offset += sizeof(struct direntry)) { 1695 #if 0 1696 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1697 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1698 #endif 1699 d_name = d_name_storage; 1700 /* 1701 * If this is an unused entry, we can stop. 1702 */ 1703 if (dentp->deName[0] == SLOT_EMPTY) { 1704 brelse(bp); 1705 goto out; 1706 } 1707 /* 1708 * Skip deleted entries. 1709 */ 1710 if (dentp->deName[0] == SLOT_DELETED) { 1711 chksum = -1; 1712 continue; 1713 } 1714 1715 /* 1716 * Handle Win95 long directory entries 1717 */ 1718 if (dentp->deAttributes == ATTR_WIN95) { 1719 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1720 continue; 1721 chksum = win2unixfn((struct winentry *)dentp, 1722 d_name, &d_namlen, chksum, 1723 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1724 pmp->pm_u2w); 1725 continue; 1726 } 1727 1728 /* 1729 * Skip volume labels 1730 */ 1731 if (dentp->deAttributes & ATTR_VOLUME) { 1732 chksum = -1; 1733 continue; 1734 } 1735 /* 1736 * This computation of d_ino must match 1737 * the computation of va_fileid in 1738 * msdosfs_getattr. 1739 */ 1740 if (dentp->deAttributes & ATTR_DIRECTORY) { 1741 d_ino = getushort(dentp->deStartCluster); 1742 if (FAT32(pmp)) 1743 d_ino |= getushort(dentp->deHighClust) << 16; 1744 /* if this is the root directory */ 1745 if (d_ino != MSDOSFSROOT) 1746 d_ino = xcntobn(pmp, d_ino) * dirsperblk; 1747 else if (FAT32(pmp)) 1748 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1749 * dirsperblk; 1750 else 1751 d_ino = 1; 1752 d_type = DT_DIR; 1753 } else { 1754 d_ino = offset / sizeof(struct direntry); 1755 d_type = DT_REG; 1756 } 1757 if (chksum != winChksum(dentp->deName)) { 1758 d_namlen = dos2unixfn(dentp->deName, 1759 (u_char *)d_name, 1760 dentp->deLowerCase | 1761 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1762 (LCASE_BASE | LCASE_EXT) : 0), 1763 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1764 pmp->pm_d2u, 1765 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1766 pmp->pm_ul); 1767 } 1768 chksum = -1; 1769 if (vop_write_dirent(&error, uio, d_ino, d_type, 1770 d_namlen, d_name)) { 1771 brelse(bp); 1772 goto out; 1773 } 1774 if (error) { 1775 brelse(bp); 1776 goto out; 1777 } 1778 1779 if (cookies) { 1780 *cookies++ = offset + sizeof(struct direntry); 1781 if (--ncookies <= 0) { 1782 brelse(bp); 1783 goto out; 1784 } 1785 } 1786 off = offset + sizeof(struct direntry); 1787 } 1788 brelse(bp); 1789 } 1790 out: 1791 if (d_name_storage != NULL) 1792 free(d_name_storage, M_TEMP); 1793 1794 /* Subtract unused cookies */ 1795 if (ap->a_ncookies) 1796 *ap->a_ncookies -= ncookies; 1797 1798 uio->uio_offset = off; 1799 1800 /* 1801 * Set the eofflag (NFS uses it) 1802 */ 1803 if (ap->a_eofflag) { 1804 if (dep->de_FileSize - (offset - bias) <= 0) 1805 *ap->a_eofflag = 1; 1806 else 1807 *ap->a_eofflag = 0; 1808 } 1809 done: 1810 vn_unlock(ap->a_vp); 1811 return (error); 1812 } 1813 1814 /* 1815 * vp - address of vnode file the file 1816 * bn - which cluster we are interested in mapping to a filesystem block number. 1817 * vpp - returns the vnode for the block special file holding the filesystem 1818 * containing the file of interest 1819 * bnp - address of where to return the filesystem relative block number 1820 * 1821 * msdosfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp, 1822 * off_t *a_doffsetp, int *a_runp, int *a_runb) 1823 */ 1824 static int 1825 msdosfs_bmap(struct vop_bmap_args *ap) 1826 { 1827 struct denode *dep = VTODE(ap->a_vp); 1828 struct msdosfsmount *pmp = dep->de_pmp; 1829 daddr_t lbn; 1830 daddr_t dbn; 1831 int error; 1832 1833 if (ap->a_vpp != NULL) 1834 *ap->a_vpp = dep->de_devvp; 1835 if (ap->a_doffsetp == NULL) 1836 return (0); 1837 if (ap->a_runp) { 1838 /* 1839 * Sequential clusters should be counted here. 1840 */ 1841 *ap->a_runp = 0; 1842 } 1843 if (ap->a_runb) { 1844 *ap->a_runb = 0; 1845 } 1846 KKASSERT(((int)ap->a_loffset & ((1 << pmp->pm_cnshift) - 1)) == 0); 1847 lbn = de_off2cn(pmp, ap->a_loffset); 1848 error = pcbmap(dep, lbn, &dbn, NULL, NULL); 1849 if (error || dbn == (daddr_t)-1) { 1850 *ap->a_doffsetp = NOOFFSET; 1851 } else { 1852 *ap->a_doffsetp = de_bntodoff(pmp, dbn); 1853 } 1854 return (error); 1855 } 1856 1857 /* 1858 * msdosfs_strategy(struct vnode *a_vp, struct bio *a_bio) 1859 */ 1860 static int 1861 msdosfs_strategy(struct vop_strategy_args *ap) 1862 { 1863 struct bio *bio = ap->a_bio; 1864 struct bio *nbio; 1865 struct buf *bp = bio->bio_buf; 1866 struct vnode *vp = ap->a_vp; 1867 struct denode *dep = VTODE(vp); 1868 struct msdosfsmount *pmp = dep->de_pmp; 1869 int error = 0; 1870 daddr_t dblkno; 1871 1872 if (vp->v_type == VBLK || vp->v_type == VCHR) 1873 panic("msdosfs_strategy: spec"); 1874 /* 1875 * If we don't already know the filesystem relative block number 1876 * then get it using pcbmap(). If pcbmap() returns the block 1877 * number as -1 then we've got a hole in the file. DOS filesystems 1878 * don't allow files with holes, so we shouldn't ever see this. 1879 */ 1880 nbio = push_bio(bio); 1881 if (nbio->bio_offset == NOOFFSET) { 1882 error = pcbmap(dep, de_off2cn(pmp, bio->bio_offset), 1883 &dblkno, NULL, NULL); 1884 if (error) { 1885 bp->b_error = error; 1886 bp->b_flags |= B_ERROR; 1887 /* I/O was never started on nbio, must biodone(bio) */ 1888 biodone(bio); 1889 return (error); 1890 } 1891 if (dblkno == (daddr_t)-1) { 1892 nbio->bio_offset = NOOFFSET; 1893 vfs_bio_clrbuf(bp); 1894 } else { 1895 nbio->bio_offset = de_bntodoff(pmp, dblkno); 1896 } 1897 } 1898 if (nbio->bio_offset == NOOFFSET) { 1899 /* I/O was never started on nbio, must biodone(bio) */ 1900 biodone(bio); 1901 return (0); 1902 } 1903 /* 1904 * Read/write the block from/to the disk that contains the desired 1905 * file block. 1906 */ 1907 vn_strategy(dep->de_devvp, nbio); 1908 return (0); 1909 } 1910 1911 /* 1912 * msdosfs_print(struct vnode *vp) 1913 */ 1914 static int 1915 msdosfs_print(struct vop_print_args *ap) 1916 { 1917 struct denode *dep = VTODE(ap->a_vp); 1918 1919 printf( 1920 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1921 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1922 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1923 lockmgr_printinfo(&ap->a_vp->v_lock); 1924 printf("\n"); 1925 return (0); 1926 } 1927 1928 /* 1929 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1930 */ 1931 static int 1932 msdosfs_pathconf(struct vop_pathconf_args *ap) 1933 { 1934 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1935 1936 switch (ap->a_name) { 1937 case _PC_LINK_MAX: 1938 *ap->a_retval = 1; 1939 return (0); 1940 case _PC_NAME_MAX: 1941 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1942 return (0); 1943 case _PC_PATH_MAX: 1944 *ap->a_retval = PATH_MAX; 1945 return (0); 1946 case _PC_CHOWN_RESTRICTED: 1947 *ap->a_retval = 1; 1948 return (0); 1949 case _PC_NO_TRUNC: 1950 *ap->a_retval = 0; 1951 return (0); 1952 default: 1953 return (EINVAL); 1954 } 1955 /* NOTREACHED */ 1956 } 1957 1958 /* 1959 * get page routine 1960 * 1961 * XXX By default, wimp out... note that a_offset is ignored (and always 1962 * XXX has been). 1963 */ 1964 int 1965 msdosfs_getpages(struct vop_getpages_args *ap) 1966 { 1967 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1968 ap->a_reqpage); 1969 } 1970 1971 /* 1972 * put page routine 1973 * 1974 * XXX By default, wimp out... note that a_offset is ignored (and always 1975 * XXX has been). 1976 */ 1977 int 1978 msdosfs_putpages(struct vop_putpages_args *ap) 1979 { 1980 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1981 ap->a_sync, ap->a_rtvals); 1982 } 1983 1984 /* Global vfs data structures for msdosfs */ 1985 struct vop_ops msdosfs_vnode_vops = { 1986 .vop_default = vop_defaultop, 1987 .vop_access = msdosfs_access, 1988 .vop_bmap = msdosfs_bmap, 1989 .vop_old_lookup = msdosfs_lookup, 1990 .vop_open = msdosfs_open, 1991 .vop_close = msdosfs_close, 1992 .vop_old_create = msdosfs_create, 1993 .vop_fsync = msdosfs_fsync, 1994 .vop_getattr = msdosfs_getattr, 1995 .vop_inactive = msdosfs_inactive, 1996 .vop_old_link = msdosfs_link, 1997 .vop_old_mkdir = msdosfs_mkdir, 1998 .vop_old_mknod = msdosfs_mknod, 1999 .vop_pathconf = msdosfs_pathconf, 2000 .vop_print = msdosfs_print, 2001 .vop_read = msdosfs_read, 2002 .vop_readdir = msdosfs_readdir, 2003 .vop_reclaim = msdosfs_reclaim, 2004 .vop_old_remove = msdosfs_remove, 2005 .vop_old_rename = msdosfs_rename, 2006 .vop_old_rmdir = msdosfs_rmdir, 2007 .vop_setattr = msdosfs_setattr, 2008 .vop_strategy = msdosfs_strategy, 2009 .vop_old_symlink = msdosfs_symlink, 2010 .vop_write = msdosfs_write, 2011 .vop_getpages = msdosfs_getpages, 2012 .vop_putpages = msdosfs_putpages 2013 }; 2014