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 1.51 2007/08/21 17:26:48 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 kprintf("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, int a_mode, struct ucred *a_cred, 215 * struct file *a_fp) 216 */ 217 static int 218 msdosfs_open(struct vop_open_args *ap) 219 { 220 return(vop_stdopen(ap)); 221 } 222 223 /* 224 * msdosfs_close(struct vnode *a_vp, int a_fflag) 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_sysref.refcnt > 1) { 234 getnanotime(&ts); 235 DETIMES(dep, &ts, &ts, &ts); 236 } 237 return (vop_stdclose(ap)); 238 } 239 240 /* 241 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 242 */ 243 static int 244 msdosfs_access(struct vop_access_args *ap) 245 { 246 struct vnode *vp = ap->a_vp; 247 struct denode *dep = VTODE(ap->a_vp); 248 struct msdosfsmount *pmp = dep->de_pmp; 249 struct ucred *cred = ap->a_cred; 250 mode_t mask, file_mode, mode = ap->a_mode; 251 gid_t *gp; 252 int i; 253 254 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 255 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 256 file_mode &= pmp->pm_mask; 257 258 /* 259 * Disallow write attempts on read-only file systems; 260 * unless the file is a socket, fifo, or a block or 261 * character device resident on the file system. 262 */ 263 if (mode & VWRITE) { 264 switch (vp->v_type) { 265 case VDIR: 266 case VLNK: 267 case VREG: 268 if (vp->v_mount->mnt_flag & MNT_RDONLY) 269 return (EROFS); 270 break; 271 default: 272 break; 273 } 274 } 275 276 /* User id 0 always gets access. */ 277 if (cred->cr_uid == 0) 278 return 0; 279 280 mask = 0; 281 282 /* Otherwise, check the owner. */ 283 if (cred->cr_uid == pmp->pm_uid) { 284 if (mode & VEXEC) 285 mask |= S_IXUSR; 286 if (mode & VREAD) 287 mask |= S_IRUSR; 288 if (mode & VWRITE) 289 mask |= S_IWUSR; 290 return (file_mode & mask) == mask ? 0 : EACCES; 291 } 292 293 /* Otherwise, check the groups. */ 294 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 295 if (pmp->pm_gid == *gp) { 296 if (mode & VEXEC) 297 mask |= S_IXGRP; 298 if (mode & VREAD) 299 mask |= S_IRGRP; 300 if (mode & VWRITE) 301 mask |= S_IWGRP; 302 return (file_mode & mask) == mask ? 0 : EACCES; 303 } 304 305 /* Otherwise, check everyone else. */ 306 if (mode & VEXEC) 307 mask |= S_IXOTH; 308 if (mode & VREAD) 309 mask |= S_IROTH; 310 if (mode & VWRITE) 311 mask |= S_IWOTH; 312 return (file_mode & mask) == mask ? 0 : EACCES; 313 } 314 315 /* 316 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 317 */ 318 static int 319 msdosfs_getattr(struct vop_getattr_args *ap) 320 { 321 struct denode *dep = VTODE(ap->a_vp); 322 struct msdosfsmount *pmp = dep->de_pmp; 323 struct vattr *vap = ap->a_vap; 324 mode_t mode; 325 struct timespec ts; 326 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 327 u_long fileid; 328 329 getnanotime(&ts); 330 DETIMES(dep, &ts, &ts, &ts); 331 vap->va_fsid = dev2udev(dep->de_dev); 332 /* 333 * The following computation of the fileid must be the same as that 334 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 335 * doesn't work. 336 */ 337 if (dep->de_Attributes & ATTR_DIRECTORY) { 338 fileid = xcntobn(pmp, dep->de_StartCluster) * dirsperblk; 339 if (dep->de_StartCluster == MSDOSFSROOT) 340 fileid = 1; 341 } else { 342 fileid = xcntobn(pmp, dep->de_dirclust) * dirsperblk; 343 if (dep->de_dirclust == MSDOSFSROOT) 344 fileid = roottobn(pmp, 0) * dirsperblk; 345 fileid += dep->de_diroffset / sizeof(struct direntry); 346 } 347 vap->va_fileid = fileid; 348 if ((dep->de_Attributes & ATTR_READONLY) == 0) 349 mode = S_IRWXU|S_IRWXG|S_IRWXO; 350 else 351 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 352 vap->va_mode = mode & pmp->pm_mask; 353 vap->va_uid = pmp->pm_uid; 354 vap->va_gid = pmp->pm_gid; 355 vap->va_nlink = 1; 356 vap->va_rmajor = VNOVAL; 357 vap->va_rminor = VNOVAL; 358 vap->va_size = dep->de_FileSize; 359 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 360 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 361 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 362 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 363 } else { 364 vap->va_atime = vap->va_mtime; 365 vap->va_ctime = vap->va_mtime; 366 } 367 vap->va_flags = 0; 368 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 369 vap->va_flags |= SF_ARCHIVED; 370 vap->va_gen = 0; 371 vap->va_blocksize = pmp->pm_bpcluster; 372 vap->va_bytes = 373 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 374 vap->va_type = ap->a_vp->v_type; 375 vap->va_filerev = dep->de_modrev; 376 return (0); 377 } 378 379 /* 380 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 381 * struct ucred *a_cred) 382 */ 383 static int 384 msdosfs_setattr(struct vop_setattr_args *ap) 385 { 386 struct vnode *vp = ap->a_vp; 387 struct denode *dep = VTODE(ap->a_vp); 388 struct msdosfsmount *pmp = dep->de_pmp; 389 struct vattr *vap = ap->a_vap; 390 struct ucred *cred = ap->a_cred; 391 int error = 0; 392 393 #ifdef MSDOSFS_DEBUG 394 kprintf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 395 ap->a_vp, vap, cred); 396 #endif 397 398 /* 399 * Check for unsettable attributes. 400 */ 401 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 402 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 403 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) || 404 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 405 #ifdef MSDOSFS_DEBUG 406 kprintf("msdosfs_setattr(): returning EINVAL\n"); 407 kprintf(" va_type %d, va_nlink %x, va_fsid %x, va_fileid %lx\n", 408 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 409 kprintf(" va_blocksize %lx, va_rmajor %x, va_bytes %qx, va_gen %lx\n", 410 vap->va_blocksize, vap->va_rmajor, vap->va_bytes, vap->va_gen); 411 kprintf(" va_uid %x, va_gid %x\n", 412 vap->va_uid, vap->va_gid); 413 #endif 414 return (EINVAL); 415 } 416 if (vap->va_flags != VNOVAL) { 417 if (vp->v_mount->mnt_flag & MNT_RDONLY) 418 return (EROFS); 419 if (cred->cr_uid != pmp->pm_uid && 420 (error = suser_cred(cred, PRISON_ROOT))) 421 return (error); 422 /* 423 * We are very inconsistent about handling unsupported 424 * attributes. We ignored the access time and the 425 * read and execute bits. We were strict for the other 426 * attributes. 427 * 428 * Here we are strict, stricter than ufs in not allowing 429 * users to attempt to set SF_SETTABLE bits or anyone to 430 * set unsupported bits. However, we ignore attempts to 431 * set ATTR_ARCHIVE for directories `cp -pr' from a more 432 * sensible file system attempts it a lot. 433 */ 434 if (cred->cr_uid != 0) { 435 if (vap->va_flags & SF_SETTABLE) 436 return EPERM; 437 } 438 if (vap->va_flags & ~SF_ARCHIVED) 439 return EOPNOTSUPP; 440 if (vap->va_flags & SF_ARCHIVED) 441 dep->de_Attributes &= ~ATTR_ARCHIVE; 442 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 443 dep->de_Attributes |= ATTR_ARCHIVE; 444 dep->de_flag |= DE_MODIFIED; 445 } 446 447 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 448 uid_t uid; 449 gid_t gid; 450 451 if (vp->v_mount->mnt_flag & MNT_RDONLY) 452 return (EROFS); 453 uid = vap->va_uid; 454 if (uid == (uid_t)VNOVAL) 455 uid = pmp->pm_uid; 456 gid = vap->va_gid; 457 if (gid == (gid_t)VNOVAL) 458 gid = pmp->pm_gid; 459 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 460 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 461 (error = suser_cred(cred, PRISON_ROOT))) 462 return error; 463 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 464 return EINVAL; 465 } 466 467 if (vap->va_size != VNOVAL) { 468 /* 469 * Disallow write attempts on read-only file systems; 470 * unless the file is a socket, fifo, or a block or 471 * character device resident on the file system. 472 */ 473 switch (vp->v_type) { 474 case VDIR: 475 return (EISDIR); 476 /* NOT REACHED */ 477 case VLNK: 478 case VREG: 479 if (vp->v_mount->mnt_flag & MNT_RDONLY) 480 return (EROFS); 481 break; 482 default: 483 break; 484 } 485 error = detrunc(dep, vap->va_size, 0); 486 if (error) 487 return error; 488 } 489 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 490 if (vp->v_mount->mnt_flag & MNT_RDONLY) 491 return (EROFS); 492 if (cred->cr_uid != pmp->pm_uid && 493 (error = suser_cred(cred, PRISON_ROOT)) && 494 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 495 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred)))) 496 return (error); 497 if (vp->v_type != VDIR) { 498 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 499 vap->va_atime.tv_sec != VNOVAL) { 500 dep->de_flag &= ~DE_ACCESS; 501 unix2dostime(&vap->va_atime, &dep->de_ADate, 502 NULL, NULL); 503 } 504 if (vap->va_mtime.tv_sec != VNOVAL) { 505 dep->de_flag &= ~DE_UPDATE; 506 unix2dostime(&vap->va_mtime, &dep->de_MDate, 507 &dep->de_MTime, NULL); 508 } 509 dep->de_Attributes |= ATTR_ARCHIVE; 510 dep->de_flag |= DE_MODIFIED; 511 } 512 } 513 /* 514 * DOS files only have the ability to have their writability 515 * attribute set, so we use the owner write bit to set the readonly 516 * attribute. 517 */ 518 if (vap->va_mode != (mode_t)VNOVAL) { 519 if (vp->v_mount->mnt_flag & MNT_RDONLY) 520 return (EROFS); 521 if (cred->cr_uid != pmp->pm_uid && 522 (error = suser_cred(cred, PRISON_ROOT))) 523 return (error); 524 if (vp->v_type != VDIR) { 525 /* We ignore the read and execute bits. */ 526 if (vap->va_mode & VWRITE) 527 dep->de_Attributes &= ~ATTR_READONLY; 528 else 529 dep->de_Attributes |= ATTR_READONLY; 530 dep->de_Attributes |= ATTR_ARCHIVE; 531 dep->de_flag |= DE_MODIFIED; 532 } 533 } 534 return (deupdat(dep, 1)); 535 } 536 537 /* 538 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 539 * struct ucred *a_cred) 540 */ 541 static int 542 msdosfs_read(struct vop_read_args *ap) 543 { 544 int error = 0; 545 int blsize; 546 int isadir; 547 int orig_resid; 548 u_int n; 549 u_long diff; 550 u_long on; 551 daddr_t lbn; 552 daddr_t rablock; 553 off_t raoffset; 554 off_t loffset; 555 int rasize; 556 int seqcount; 557 struct buf *bp; 558 struct vnode *vp = ap->a_vp; 559 struct denode *dep = VTODE(vp); 560 struct msdosfsmount *pmp = dep->de_pmp; 561 struct uio *uio = ap->a_uio; 562 563 if (uio->uio_offset < 0) 564 return (EINVAL); 565 566 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 567 return (0); 568 /* 569 * If they didn't ask for any data, then we are done. 570 */ 571 orig_resid = uio->uio_resid; 572 if (orig_resid <= 0) 573 return (0); 574 575 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 576 577 isadir = dep->de_Attributes & ATTR_DIRECTORY; 578 do { 579 if (uio->uio_offset >= dep->de_FileSize) 580 break; 581 582 /* 583 * note: lbn is a cluster number, not a device block number. 584 */ 585 lbn = de_off2cn(pmp, uio->uio_offset); 586 loffset = de_cn2doff(pmp, lbn); 587 588 /* 589 * If we are operating on a directory file then be sure to 590 * do i/o with the vnode for the filesystem instead of the 591 * vnode for the directory. 592 */ 593 if (isadir) { 594 /* 595 * convert cluster # to block #. lbn is a 596 * device block number after this. 597 */ 598 error = pcbmap(dep, lbn, &lbn, NULL, &blsize); 599 loffset = de_bntodoff(pmp, lbn); 600 if (error == E2BIG) { 601 error = EINVAL; 602 break; 603 } else if (error) 604 break; 605 error = bread(pmp->pm_devvp, loffset, blsize, &bp); 606 } else { 607 blsize = pmp->pm_bpcluster; 608 rablock = lbn + 1; 609 raoffset = de_cn2doff(pmp, rablock); 610 if (seqcount > 1 && 611 raoffset < dep->de_FileSize) { 612 rasize = pmp->pm_bpcluster; 613 error = breadn(vp, loffset, blsize, 614 &raoffset, &rasize, 1, &bp); 615 } else { 616 error = bread(vp, loffset, blsize, &bp); 617 } 618 } 619 if (error) { 620 brelse(bp); 621 break; 622 } 623 on = uio->uio_offset & pmp->pm_crbomask; 624 diff = pmp->pm_bpcluster - on; 625 n = diff > uio->uio_resid ? uio->uio_resid : diff; 626 diff = dep->de_FileSize - uio->uio_offset; 627 if (diff < n) 628 n = diff; 629 diff = blsize - bp->b_resid; 630 if (diff < n) 631 n = diff; 632 error = uiomove(bp->b_data + on, (int) n, uio); 633 brelse(bp); 634 } while (error == 0 && uio->uio_resid > 0 && n != 0); 635 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 636 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 637 dep->de_flag |= DE_ACCESS; 638 return (error); 639 } 640 641 /* 642 * Write data to a file or directory. 643 * 644 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 645 * struct ucred *a_cred) 646 */ 647 static int 648 msdosfs_write(struct vop_write_args *ap) 649 { 650 int n; 651 int croffset; 652 int resid; 653 u_long osize; 654 int error = 0; 655 u_long count; 656 daddr_t cn, lastcn; 657 struct buf *bp; 658 int ioflag = ap->a_ioflag; 659 struct uio *uio = ap->a_uio; 660 struct thread *td = uio->uio_td; 661 struct vnode *vp = ap->a_vp; 662 struct vnode *thisvp; 663 struct denode *dep = VTODE(vp); 664 struct msdosfsmount *pmp = dep->de_pmp; 665 struct proc *p = (td ? td->td_proc : NULL); 666 struct lwp *lp = (td ? td->td_lwp : NULL); 667 668 #ifdef MSDOSFS_DEBUG 669 kprintf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 670 vp, uio, ioflag, ap->a_cred); 671 kprintf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 672 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 673 #endif 674 675 switch (vp->v_type) { 676 case VREG: 677 if (ioflag & IO_APPEND) 678 uio->uio_offset = dep->de_FileSize; 679 thisvp = vp; 680 break; 681 case VDIR: 682 return EISDIR; 683 default: 684 panic("msdosfs_write(): bad file type"); 685 } 686 687 if (uio->uio_offset < 0) 688 return (EFBIG); 689 690 if (uio->uio_resid == 0) 691 return (0); 692 693 /* 694 * If they've exceeded their filesize limit, tell them about it. 695 */ 696 if (p && 697 ((uoff_t)uio->uio_offset + uio->uio_resid > 698 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 699 lwpsignal(p, lp, SIGXFSZ); 700 return (EFBIG); 701 } 702 703 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 704 return (EFBIG); 705 706 /* 707 * If the offset we are starting the write at is beyond the end of 708 * the file, then they've done a seek. Unix filesystems allow 709 * files with holes in them, DOS doesn't so we must fill the hole 710 * with zeroed blocks. 711 */ 712 if (uio->uio_offset > dep->de_FileSize) { 713 error = deextend(dep, uio->uio_offset); 714 if (error) 715 return (error); 716 } 717 718 /* 719 * Remember some values in case the write fails. 720 */ 721 resid = uio->uio_resid; 722 osize = dep->de_FileSize; 723 724 /* 725 * If we write beyond the end of the file, extend it to its ultimate 726 * size ahead of the time to hopefully get a contiguous area. 727 */ 728 if (uio->uio_offset + resid > osize) { 729 count = de_clcount(pmp, uio->uio_offset + resid) - 730 de_clcount(pmp, osize); 731 error = extendfile(dep, count, NULL, NULL, 0); 732 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 733 goto errexit; 734 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 735 } else 736 lastcn = de_clcount(pmp, osize) - 1; 737 738 do { 739 if (de_off2cn(pmp, uio->uio_offset) > lastcn) { 740 error = ENOSPC; 741 break; 742 } 743 744 croffset = uio->uio_offset & pmp->pm_crbomask; 745 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 746 if (uio->uio_offset + n > dep->de_FileSize) { 747 dep->de_FileSize = uio->uio_offset + n; 748 /* The object size needs to be set before buffer is allocated */ 749 vnode_pager_setsize(vp, dep->de_FileSize); 750 } 751 752 /* 753 * If either the whole cluster gets written, or we write 754 * the cluster from its start beyond EOF, then no need to 755 * read data from disk. 756 * 757 * If UIO_NOCOPY is set we have to do a read-before-write 758 * to fill in any missing pieces of the buffer since no 759 * actual overwrite will occur. 760 */ 761 cn = de_off2cn(pmp, uio->uio_offset); 762 if ((uio->uio_offset & pmp->pm_crbomask) == 0 763 && uio->uio_segflg != UIO_NOCOPY 764 && (de_off2cn(pmp, uio->uio_offset + uio->uio_resid) 765 > de_off2cn(pmp, uio->uio_offset) 766 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 767 bp = getblk(thisvp, de_cn2doff(pmp, cn), 768 pmp->pm_bpcluster, 0, 0); 769 clrbuf(bp); 770 /* 771 * Do the bmap now, since pcbmap needs buffers 772 * for the fat table. (see msdosfs_strategy) 773 */ 774 if (bp->b_bio2.bio_offset == NOOFFSET) { 775 daddr_t lblkno = de_off2cn(pmp, bp->b_loffset); 776 daddr_t dblkno; 777 778 error = pcbmap(dep, lblkno, 779 &dblkno, NULL, NULL); 780 if (error || dblkno == (daddr_t)-1) { 781 bp->b_bio2.bio_offset = NOOFFSET; 782 } else { 783 bp->b_bio2.bio_offset = de_bntodoff(pmp, dblkno); 784 } 785 } 786 if (bp->b_bio2.bio_offset == NOOFFSET) { 787 brelse(bp); 788 if (!error) 789 error = EIO; /* XXX */ 790 break; 791 } 792 } else { 793 /* 794 * The block we need to write into exists, so read 795 * it in. 796 */ 797 error = bread(thisvp, de_cn2doff(pmp, cn), 798 pmp->pm_bpcluster, &bp); 799 if (error) { 800 brelse(bp); 801 break; 802 } 803 } 804 805 /* 806 * Should these vnode_pager_* functions be done on dir 807 * files? 808 */ 809 810 /* 811 * Copy the data from user space into the buf header. 812 */ 813 error = uiomove(bp->b_data + croffset, n, uio); 814 if (error) { 815 brelse(bp); 816 break; 817 } 818 819 /* 820 * If they want this synchronous then write it and wait for 821 * it. Otherwise, if on a cluster boundary write it 822 * asynchronously so we can move on to the next block 823 * without delay. Otherwise do a delayed write because we 824 * may want to write somemore into the block later. 825 */ 826 if (ioflag & IO_SYNC) 827 bwrite(bp); 828 else if (n + croffset == pmp->pm_bpcluster) 829 bawrite(bp); 830 else 831 bdwrite(bp); 832 dep->de_flag |= DE_UPDATE; 833 } while (error == 0 && uio->uio_resid > 0); 834 835 /* 836 * If the write failed and they want us to, truncate the file back 837 * to the size it was before the write was attempted. 838 */ 839 errexit: 840 if (error) { 841 if (ioflag & IO_UNIT) { 842 detrunc(dep, osize, ioflag & IO_SYNC); 843 uio->uio_offset -= resid - uio->uio_resid; 844 uio->uio_resid = resid; 845 } else { 846 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC); 847 if (uio->uio_resid != resid) 848 error = 0; 849 } 850 } else if (ioflag & IO_SYNC) 851 error = deupdat(dep, 1); 852 return (error); 853 } 854 855 /* 856 * Flush the blocks of a file to disk. 857 * 858 * This function is worthless for vnodes that represent directories. Maybe we 859 * could just do a sync if they try an fsync on a directory file. 860 * 861 * msdosfs_fsync(struct vnode *a_vp, int a_waitfor) 862 */ 863 static int 864 msdosfs_fsync(struct vop_fsync_args *ap) 865 { 866 struct vnode *vp = ap->a_vp; 867 868 /* 869 * Flush all dirty buffers associated with a vnode. 870 */ 871 #ifdef DIAGNOSTIC 872 loop: 873 #endif 874 vfsync(vp, ap->a_waitfor, 0, NULL, NULL); 875 #ifdef DIAGNOSTIC 876 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 877 vprint("msdosfs_fsync: dirty", vp); 878 goto loop; 879 } 880 #endif 881 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 882 } 883 884 /* 885 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 886 * struct componentname *a_cnp) 887 */ 888 static int 889 msdosfs_remove(struct vop_old_remove_args *ap) 890 { 891 struct denode *dep = VTODE(ap->a_vp); 892 struct denode *ddep = VTODE(ap->a_dvp); 893 int error; 894 895 if (ap->a_vp->v_type == VDIR) 896 error = EPERM; 897 else 898 error = removede(ddep, dep); 899 #ifdef MSDOSFS_DEBUG 900 kprintf("msdosfs_remove(), dep %p, v_sysrefs %d\n", 901 dep, ap->a_vp->v_sysref.refcnt); 902 #endif 903 return (error); 904 } 905 906 /* 907 * DOS filesystems don't know what links are. But since we already called 908 * msdosfs_lookup() with create and lockparent, the parent is locked so we 909 * have to free it before we return the error. 910 * 911 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 912 * struct componentname *a_cnp) 913 */ 914 static int 915 msdosfs_link(struct vop_old_link_args *ap) 916 { 917 return (EOPNOTSUPP); 918 } 919 920 /* 921 * Renames on files require moving the denode to a new hash queue since the 922 * denode's location is used to compute which hash queue to put the file 923 * in. Unless it is a rename in place. For example "mv a b". 924 * 925 * What follows is the basic algorithm: 926 * 927 * if (file move) { 928 * if (dest file exists) { 929 * remove dest file 930 * } 931 * if (dest and src in same directory) { 932 * rewrite name in existing directory slot 933 * } else { 934 * write new entry in dest directory 935 * update offset and dirclust in denode 936 * move denode to new hash chain 937 * clear old directory entry 938 * } 939 * } else { 940 * directory move 941 * if (dest directory exists) { 942 * if (dest is not empty) { 943 * return ENOTEMPTY 944 * } 945 * remove dest directory 946 * } 947 * if (dest and src in same directory) { 948 * rewrite name in existing entry 949 * } else { 950 * be sure dest is not a child of src directory 951 * write entry in dest directory 952 * update "." and ".." in moved directory 953 * clear old directory entry for moved directory 954 * } 955 * } 956 * 957 * On entry: 958 * source's parent directory is unlocked 959 * source file or directory is unlocked 960 * destination's parent directory is locked 961 * destination file or directory is locked if it exists 962 * 963 * On exit: 964 * all denodes should be released 965 * 966 * Notes: 967 * I'm not sure how the memory containing the pathnames pointed at by the 968 * componentname structures is freed, there may be some memory bleeding 969 * for each rename done. 970 * 971 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 972 * struct componentname *a_fcnp, struct vnode *a_tdvp, 973 * struct vnode *a_tvp, struct componentname *a_tcnp) 974 */ 975 static int 976 msdosfs_rename(struct vop_old_rename_args *ap) 977 { 978 struct vnode *tdvp = ap->a_tdvp; 979 struct vnode *fvp = ap->a_fvp; 980 struct vnode *fdvp = ap->a_fdvp; 981 struct vnode *tvp = ap->a_tvp; 982 struct componentname *tcnp = ap->a_tcnp; 983 struct componentname *fcnp = ap->a_fcnp; 984 struct denode *ip, *xp, *dp, *zp; 985 u_char toname[11], oldname[11]; 986 u_long from_diroffset, to_diroffset; 987 u_char to_count; 988 int doingdirectory = 0, newparent = 0; 989 int error; 990 u_long cn; 991 daddr_t bn; 992 struct denode *fddep; /* from file's parent directory */ 993 struct msdosfsmount *pmp; 994 struct direntry *dotdotp; 995 struct buf *bp; 996 997 fddep = VTODE(ap->a_fdvp); 998 pmp = fddep->de_pmp; 999 1000 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1001 1002 /* 1003 * Check for cross-device rename. 1004 */ 1005 if ((fvp->v_mount != tdvp->v_mount) || 1006 (tvp && (fvp->v_mount != tvp->v_mount))) { 1007 error = EXDEV; 1008 abortit: 1009 if (tdvp == tvp) 1010 vrele(tdvp); 1011 else 1012 vput(tdvp); 1013 if (tvp) 1014 vput(tvp); 1015 vrele(fdvp); 1016 vrele(fvp); 1017 return (error); 1018 } 1019 1020 /* 1021 * If source and dest are the same, do nothing. 1022 */ 1023 if (tvp == fvp) { 1024 error = 0; 1025 goto abortit; 1026 } 1027 1028 /* 1029 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note 1030 * that we have to unlock it to use the abortit target. 1031 */ 1032 error = vn_lock(fvp, LK_EXCLUSIVE); 1033 if (error) 1034 goto abortit; 1035 dp = VTODE(fdvp); 1036 ip = VTODE(fvp); 1037 1038 /* 1039 * Be sure we are not renaming ".", "..", or an alias of ".". This 1040 * leads to a crippled directory tree. It's pretty tough to do a 1041 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1042 * doesn't work if the ".." entry is missing. 1043 */ 1044 if (ip->de_Attributes & ATTR_DIRECTORY) { 1045 /* 1046 * Avoid ".", "..", and aliases of "." for obvious reasons. 1047 */ 1048 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1049 dp == ip || 1050 (fcnp->cn_flags & CNP_ISDOTDOT) || 1051 (tcnp->cn_flags & CNP_ISDOTDOT) || 1052 (ip->de_flag & DE_RENAME)) { 1053 vn_unlock(fvp); 1054 error = EINVAL; 1055 goto abortit; 1056 } 1057 ip->de_flag |= DE_RENAME; 1058 doingdirectory++; 1059 } 1060 1061 /* 1062 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only 1063 * set if doingdirectory. We will get fvp unlocked in fairly 1064 * short order. dp and xp must be setup and fvp must be unlocked 1065 * for the out and bad targets to work properly. 1066 */ 1067 dp = VTODE(tdvp); 1068 xp = tvp ? VTODE(tvp) : NULL; 1069 1070 /* 1071 * Remember direntry place to use for destination 1072 */ 1073 to_diroffset = dp->de_fndoffset; 1074 to_count = dp->de_fndcnt; 1075 1076 /* 1077 * If ".." must be changed (ie the directory gets a new 1078 * parent) then the source directory must not be in the 1079 * directory heirarchy above the target, as this would 1080 * orphan everything below the source directory. Also 1081 * the user must have write permission in the source so 1082 * as to be able to change "..". We must repeat the call 1083 * to namei, as the parent directory is unlocked by the 1084 * call to doscheckpath(). 1085 */ 1086 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 1087 vn_unlock(fvp); 1088 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1089 newparent = 1; 1090 1091 /* 1092 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL. 1093 * DE_RENAME only set if doingdirectory. 1094 */ 1095 if (doingdirectory && newparent) { 1096 if (error) /* write access check above */ 1097 goto bad; 1098 if (xp != NULL) { 1099 vput(tvp); 1100 xp = NULL; 1101 } 1102 /* 1103 * checkpath vput's tdvp (VTOI(dp)) on return no matter what, 1104 * get an extra ref so we wind up with just an unlocked, ref'd 1105 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp 1106 * isn't locked so we can't use the out target). 1107 */ 1108 vref(tdvp); 1109 error = doscheckpath(ip, dp); 1110 tcnp->cn_flags |= CNP_PDIRUNLOCK; 1111 if (error) { 1112 vrele(tdvp); 1113 goto out; 1114 } 1115 /* 1116 * relookup no longer messes with the ref count. tdvp must 1117 * be unlocked on entry and on success will be locked on 1118 * return. 1119 */ 1120 error = relookup(tdvp, &tvp, tcnp); 1121 if (error) { 1122 if (tcnp->cn_flags & CNP_PDIRUNLOCK) 1123 vrele(tdvp); 1124 else 1125 vput(tdvp); 1126 goto out; 1127 } 1128 1129 /* 1130 * tvp and tdvp are now locked again. 1131 */ 1132 dp = VTODE(tdvp); 1133 xp = tvp ? VTODE(tvp) : NULL; 1134 } 1135 1136 /* 1137 * tvp and tdvp are now locked again, the 'bad' target can be used 1138 * to clean them up again. Delete an existant target and clean 1139 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up. 1140 */ 1141 if (xp != NULL) { 1142 /* 1143 * Target must be empty if a directory and have no links 1144 * to it. Also, ensure source and target are compatible 1145 * (both directories, or both not directories). 1146 */ 1147 if (xp->de_Attributes & ATTR_DIRECTORY) { 1148 if (!dosdirempty(xp)) { 1149 error = ENOTEMPTY; 1150 goto bad; 1151 } 1152 if (!doingdirectory) { 1153 error = ENOTDIR; 1154 goto bad; 1155 } 1156 } else if (doingdirectory) { 1157 error = EISDIR; 1158 goto bad; 1159 } 1160 error = removede(dp, xp); 1161 if (error) 1162 goto bad; 1163 vput(tvp); 1164 xp = NULL; 1165 tvp = NULL; 1166 } 1167 1168 /* 1169 * Convert the filename in tcnp into a dos filename. We copy this 1170 * into the denode and directory entry for the destination 1171 * file/directory. 1172 */ 1173 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1174 if (error) 1175 goto bad; 1176 1177 /* 1178 * Since from wasn't locked at various places above, we have to do 1179 * a relookup here. If the target and source are the same directory 1180 * we have to unlock the target directory in order to safely relookup 1181 * the source, because relookup expects its directory to be unlocked. 1182 * 1183 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must 1184 * now take that into account. 1185 * 1186 * The tdvp locking issues make this a real mess. 1187 */ 1188 fcnp->cn_flags &= ~CNP_MODMASK; 1189 fcnp->cn_flags |= CNP_LOCKPARENT; 1190 if (newparent == 0) 1191 vn_unlock(tdvp); 1192 error = relookup(fdvp, &fvp, fcnp); 1193 if (error || fvp == NULL) { 1194 /* 1195 * From name has disappeared. Note: fdvp might == tdvp. 1196 * 1197 * DE_RENAME is only set if doingdirectory. 1198 */ 1199 if (doingdirectory) 1200 panic("rename: lost dir entry"); 1201 if (fcnp->cn_flags & CNP_PDIRUNLOCK) 1202 vrele(fdvp); 1203 else 1204 vput(fdvp); 1205 if (newparent == 0) 1206 vrele(tdvp); 1207 else 1208 vput(tdvp); 1209 vrele(ap->a_fvp); 1210 return(0); 1211 } 1212 1213 /* 1214 * No error occured. tdvp, fdvp and fvp are all locked. If 1215 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned 1216 * up. ap->a_fvp is still refd. 1217 */ 1218 xp = VTODE(fvp); 1219 zp = VTODE(fdvp); 1220 from_diroffset = zp->de_fndoffset; 1221 1222 /* 1223 * Ensure that the directory entry still exists and has not 1224 * changed till now. If the source is a file the entry may 1225 * have been unlinked or renamed. In either case there is 1226 * no further work to be done. If the source is a directory 1227 * then it cannot have been rmdir'ed or renamed; this is 1228 * prohibited by the DE_RENAME flag. 1229 * 1230 * DE_RENAME is only set if doingdirectory. 1231 */ 1232 if (xp != ip) { 1233 if (doingdirectory) 1234 panic("rename: lost dir entry"); 1235 goto done; 1236 } else { 1237 u_long new_dirclust; 1238 u_long new_diroffset; 1239 1240 /* 1241 * First write a new entry in the destination 1242 * directory and mark the entry in the source directory 1243 * as deleted. Then move the denode to the correct hash 1244 * chain for its new location in the filesystem. And, if 1245 * we moved a directory, then update its .. entry to point 1246 * to the new parent directory. 1247 */ 1248 bcopy(ip->de_Name, oldname, 11); 1249 bcopy(toname, ip->de_Name, 11); /* update denode */ 1250 dp->de_fndoffset = to_diroffset; 1251 dp->de_fndcnt = to_count; 1252 error = createde(ip, dp, (struct denode **)0, tcnp); 1253 if (error) { 1254 bcopy(oldname, ip->de_Name, 11); 1255 goto done; 1256 } 1257 ip->de_refcnt++; 1258 zp->de_fndoffset = from_diroffset; 1259 error = removede(zp, ip); 1260 if (error) { 1261 /* XXX should really panic here, fs is corrupt */ 1262 goto done; 1263 } 1264 if (!doingdirectory) { 1265 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 1266 NULL, &new_dirclust, NULL); 1267 if (error) { 1268 /* XXX should really panic here, fs is corrupt */ 1269 goto done; 1270 } 1271 if (new_dirclust == MSDOSFSROOT) 1272 new_diroffset = to_diroffset; 1273 else 1274 new_diroffset = to_diroffset & pmp->pm_crbomask; 1275 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1276 } 1277 } 1278 1279 /* 1280 * If we moved a directory to a new parent directory, then we must 1281 * fixup the ".." entry in the moved directory. 1282 */ 1283 if (doingdirectory && newparent) { 1284 cn = ip->de_StartCluster; 1285 if (cn == MSDOSFSROOT) { 1286 /* this should never happen */ 1287 panic("msdosfs_rename(): updating .. in root directory?"); 1288 } else { 1289 bn = xcntobn(pmp, cn); 1290 } 1291 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), pmp->pm_bpcluster, &bp); 1292 if (error) { 1293 /* XXX should really panic here, fs is corrupt */ 1294 brelse(bp); 1295 goto done; 1296 } 1297 dotdotp = (struct direntry *)bp->b_data + 1; 1298 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1299 if (FAT32(pmp)) 1300 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1301 error = bwrite(bp); 1302 if (error) { 1303 /* XXX should really panic here, fs is corrupt */ 1304 goto done; 1305 } 1306 } 1307 1308 /* 1309 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd 1310 */ 1311 done: 1312 if (doingdirectory) 1313 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */ 1314 vput(fvp); 1315 if (newparent) 1316 vput(fdvp); 1317 else 1318 vrele(fdvp); 1319 vput(tdvp); 1320 vrele(ap->a_fvp); 1321 return (error); 1322 1323 /* 1324 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp 1325 * are not locked. ip points to fvp's inode which may have DE_RENAME 1326 * set. 1327 */ 1328 bad: 1329 if (xp) 1330 vput(tvp); 1331 vput(tdvp); 1332 out: 1333 /* 1334 * 'out' target: tvp and tdvp have already been cleaned up. 1335 */ 1336 if (doingdirectory) 1337 ip->de_flag &= ~DE_RENAME; 1338 vrele(fdvp); 1339 vrele(fvp); 1340 return (error); 1341 1342 } 1343 1344 static struct { 1345 struct direntry dot; 1346 struct direntry dotdot; 1347 } dosdirtemplate = { 1348 { ". ", " ", /* the . entry */ 1349 ATTR_DIRECTORY, /* file attribute */ 1350 0, /* reserved */ 1351 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1352 { 0, 0 }, /* access date */ 1353 { 0, 0 }, /* high bits of start cluster */ 1354 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1355 { 0, 0 }, /* startcluster */ 1356 { 0, 0, 0, 0 } /* filesize */ 1357 }, 1358 { ".. ", " ", /* the .. entry */ 1359 ATTR_DIRECTORY, /* file attribute */ 1360 0, /* reserved */ 1361 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1362 { 0, 0 }, /* access date */ 1363 { 0, 0 }, /* high bits of start cluster */ 1364 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1365 { 0, 0 }, /* startcluster */ 1366 { 0, 0, 0, 0 } /* filesize */ 1367 } 1368 }; 1369 1370 /* 1371 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1372 * struct componentname *a_cnp, struct vattr *a_vap) 1373 */ 1374 static int 1375 msdosfs_mkdir(struct vop_old_mkdir_args *ap) 1376 { 1377 struct componentname *cnp = ap->a_cnp; 1378 struct denode *dep; 1379 struct denode *pdep = VTODE(ap->a_dvp); 1380 struct direntry *denp; 1381 struct msdosfsmount *pmp = pdep->de_pmp; 1382 struct buf *bp; 1383 u_long newcluster, pcl; 1384 int bn; 1385 int error; 1386 struct denode ndirent; 1387 struct timespec ts; 1388 1389 /* 1390 * If this is the root directory and there is no space left we 1391 * can't do anything. This is because the root directory can not 1392 * change size. 1393 */ 1394 if (pdep->de_StartCluster == MSDOSFSROOT 1395 && pdep->de_fndoffset >= pdep->de_FileSize) { 1396 error = ENOSPC; 1397 goto bad2; 1398 } 1399 1400 /* 1401 * Allocate a cluster to hold the about to be created directory. 1402 */ 1403 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1404 if (error) 1405 goto bad2; 1406 1407 bzero(&ndirent, sizeof(ndirent)); 1408 ndirent.de_pmp = pmp; 1409 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1410 getnanotime(&ts); 1411 DETIMES(&ndirent, &ts, &ts, &ts); 1412 1413 /* 1414 * Now fill the cluster with the "." and ".." entries. And write 1415 * the cluster to disk. This way it is there for the parent 1416 * directory to be pointing at if there were a crash. 1417 */ 1418 bn = xcntobn(pmp, newcluster); 1419 /* always succeeds */ 1420 bp = getblk(pmp->pm_devvp, de_bntodoff(pmp, bn), 1421 pmp->pm_bpcluster, 0, 0); 1422 bzero(bp->b_data, pmp->pm_bpcluster); 1423 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1424 denp = (struct direntry *)bp->b_data; 1425 putushort(denp[0].deStartCluster, newcluster); 1426 putushort(denp[0].deCDate, ndirent.de_CDate); 1427 putushort(denp[0].deCTime, ndirent.de_CTime); 1428 denp[0].deCHundredth = ndirent.de_CHun; 1429 putushort(denp[0].deADate, ndirent.de_ADate); 1430 putushort(denp[0].deMDate, ndirent.de_MDate); 1431 putushort(denp[0].deMTime, ndirent.de_MTime); 1432 pcl = pdep->de_StartCluster; 1433 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1434 pcl = 0; 1435 putushort(denp[1].deStartCluster, pcl); 1436 putushort(denp[1].deCDate, ndirent.de_CDate); 1437 putushort(denp[1].deCTime, ndirent.de_CTime); 1438 denp[1].deCHundredth = ndirent.de_CHun; 1439 putushort(denp[1].deADate, ndirent.de_ADate); 1440 putushort(denp[1].deMDate, ndirent.de_MDate); 1441 putushort(denp[1].deMTime, ndirent.de_MTime); 1442 if (FAT32(pmp)) { 1443 putushort(denp[0].deHighClust, newcluster >> 16); 1444 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1445 } 1446 1447 error = bwrite(bp); 1448 if (error) 1449 goto bad; 1450 1451 /* 1452 * Now build up a directory entry pointing to the newly allocated 1453 * cluster. This will be written to an empty slot in the parent 1454 * directory. 1455 */ 1456 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1457 if (error) 1458 goto bad; 1459 1460 ndirent.de_Attributes = ATTR_DIRECTORY; 1461 ndirent.de_LowerCase = 0; 1462 ndirent.de_StartCluster = newcluster; 1463 ndirent.de_FileSize = 0; 1464 ndirent.de_dev = pdep->de_dev; 1465 ndirent.de_devvp = pdep->de_devvp; 1466 error = createde(&ndirent, pdep, &dep, cnp); 1467 if (error) 1468 goto bad; 1469 *ap->a_vpp = DETOV(dep); 1470 return (0); 1471 1472 bad: 1473 clusterfree(pmp, newcluster, NULL); 1474 bad2: 1475 return (error); 1476 } 1477 1478 /* 1479 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1480 * struct componentname *a_cnp) 1481 */ 1482 static int 1483 msdosfs_rmdir(struct vop_old_rmdir_args *ap) 1484 { 1485 struct vnode *vp = ap->a_vp; 1486 struct vnode *dvp = ap->a_dvp; 1487 struct denode *ip, *dp; 1488 int error; 1489 1490 ip = VTODE(vp); 1491 dp = VTODE(dvp); 1492 1493 /* 1494 * Verify the directory is empty (and valid). 1495 * (Rmdir ".." won't be valid since 1496 * ".." will contain a reference to 1497 * the current directory and thus be 1498 * non-empty.) 1499 */ 1500 error = 0; 1501 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1502 error = ENOTEMPTY; 1503 goto out; 1504 } 1505 /* 1506 * Delete the entry from the directory. For dos filesystems this 1507 * gets rid of the directory entry on disk, the in memory copy 1508 * still exists but the de_refcnt is <= 0. This prevents it from 1509 * being found by deget(). When the vput() on dep is done we give 1510 * up access and eventually msdosfs_reclaim() will be called which 1511 * will remove it from the denode cache. 1512 */ 1513 error = removede(dp, ip); 1514 if (error) 1515 goto out; 1516 /* 1517 * This is where we decrement the link count in the parent 1518 * directory. Since dos filesystems don't do this we just purge 1519 * the name cache. 1520 */ 1521 vn_unlock(dvp); 1522 /* 1523 * Truncate the directory that is being deleted. 1524 */ 1525 error = detrunc(ip, (u_long)0, IO_SYNC); 1526 1527 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1528 out: 1529 return (error); 1530 } 1531 1532 /* 1533 * DOS filesystems don't know what symlinks are. 1534 * 1535 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1536 * struct componentname *a_cnp, struct vattr *a_vap, 1537 * char *a_target) 1538 */ 1539 static int 1540 msdosfs_symlink(struct vop_old_symlink_args *ap) 1541 { 1542 return (EOPNOTSUPP); 1543 } 1544 1545 /* 1546 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1547 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1548 * u_long **a_cookies) 1549 */ 1550 static int 1551 msdosfs_readdir(struct vop_readdir_args *ap) 1552 { 1553 int error = 0; 1554 int diff; 1555 long n; 1556 int blsize; 1557 long on; 1558 u_long cn; 1559 u_long dirsperblk; 1560 long bias = 0; 1561 daddr_t bn, lbn; 1562 struct buf *bp; 1563 struct denode *dep; 1564 struct msdosfsmount *pmp; 1565 struct direntry *dentp; 1566 struct uio *uio = ap->a_uio; 1567 u_long *cookies = NULL; 1568 int ncookies = 0; 1569 off_t offset, off; 1570 int chksum = -1; 1571 ino_t d_ino; 1572 uint16_t d_namlen; 1573 uint8_t d_type; 1574 char *d_name_storage = NULL; 1575 char *d_name; 1576 1577 if ((error = vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 1578 return (error); 1579 1580 dep = VTODE(ap->a_vp); 1581 pmp = dep->de_pmp; 1582 1583 #ifdef MSDOSFS_DEBUG 1584 kprintf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1585 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1586 #endif 1587 1588 /* 1589 * msdosfs_readdir() won't operate properly on regular files since 1590 * it does i/o only with the the filesystem vnode, and hence can 1591 * retrieve the wrong block from the buffer cache for a plain file. 1592 * So, fail attempts to readdir() on a plain file. 1593 */ 1594 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) { 1595 error = ENOTDIR; 1596 goto done; 1597 } 1598 1599 /* 1600 * If the user buffer is smaller than the size of one dos directory 1601 * entry or the file offset is not a multiple of the size of a 1602 * directory entry, then we fail the read. 1603 */ 1604 off = offset = uio->uio_offset; 1605 if (uio->uio_resid < sizeof(struct direntry) || 1606 (offset & (sizeof(struct direntry) - 1))) { 1607 error = EINVAL; 1608 goto done; 1609 } 1610 1611 if (ap->a_ncookies) { 1612 ncookies = uio->uio_resid / 16 + 1; 1613 if (ncookies > 1024) 1614 ncookies = 1024; 1615 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1616 M_WAITOK); 1617 *ap->a_cookies = cookies; 1618 *ap->a_ncookies = ncookies; 1619 } 1620 1621 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1622 1623 /* 1624 * If they are reading from the root directory then, we simulate 1625 * the . and .. entries since these don't exist in the root 1626 * directory. We also set the offset bias to make up for having to 1627 * simulate these entries. By this I mean that at file offset 64 we 1628 * read the first entry in the root directory that lives on disk. 1629 */ 1630 if (dep->de_StartCluster == MSDOSFSROOT 1631 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1632 #if 0 1633 kprintf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1634 offset); 1635 #endif 1636 bias = 2 * sizeof(struct direntry); 1637 if (offset < bias) { 1638 for (n = (int)offset / sizeof(struct direntry); n < 2; 1639 n++) { 1640 if (FAT32(pmp)) 1641 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1642 * dirsperblk; 1643 else 1644 d_ino = 1; 1645 d_type = DT_DIR; 1646 if (n == 0) { 1647 d_namlen = 1; 1648 d_name = "."; 1649 } else /* if (n == 1) */{ 1650 d_namlen = 2; 1651 d_name = ".."; 1652 } 1653 if (vop_write_dirent(&error, uio, d_ino, d_type, 1654 d_namlen, d_name)) 1655 goto out; 1656 if (error) 1657 goto out; 1658 offset += sizeof(struct direntry); 1659 off = offset; 1660 if (cookies) { 1661 *cookies++ = offset; 1662 if (--ncookies <= 0) 1663 goto out; 1664 } 1665 } 1666 } 1667 } 1668 1669 d_name_storage = kmalloc(WIN_MAXLEN, M_TEMP, M_WAITOK); 1670 off = offset; 1671 1672 while (uio->uio_resid > 0) { 1673 lbn = de_off2cn(pmp, offset - bias); 1674 on = (offset - bias) & pmp->pm_crbomask; 1675 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1676 diff = dep->de_FileSize - (offset - bias); 1677 if (diff <= 0) 1678 break; 1679 n = min(n, diff); 1680 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1681 if (error) 1682 break; 1683 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), blsize, &bp); 1684 if (error) { 1685 brelse(bp); 1686 kfree(d_name_storage, M_TEMP); 1687 goto done; 1688 } 1689 n = min(n, blsize - bp->b_resid); 1690 1691 /* 1692 * Convert from dos directory entries to fs-independent 1693 * directory entries. 1694 */ 1695 for (dentp = (struct direntry *)(bp->b_data + on); 1696 (char *)dentp < bp->b_data + on + n; 1697 dentp++, offset += sizeof(struct direntry)) { 1698 #if 0 1699 kprintf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1700 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1701 #endif 1702 d_name = d_name_storage; 1703 /* 1704 * If this is an unused entry, we can stop. 1705 */ 1706 if (dentp->deName[0] == SLOT_EMPTY) { 1707 brelse(bp); 1708 goto out; 1709 } 1710 /* 1711 * Skip deleted entries. 1712 */ 1713 if (dentp->deName[0] == SLOT_DELETED) { 1714 chksum = -1; 1715 continue; 1716 } 1717 1718 /* 1719 * Handle Win95 long directory entries 1720 */ 1721 if (dentp->deAttributes == ATTR_WIN95) { 1722 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1723 continue; 1724 chksum = win2unixfn((struct winentry *)dentp, 1725 d_name, &d_namlen, chksum, 1726 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1727 pmp->pm_u2w); 1728 continue; 1729 } 1730 1731 /* 1732 * Skip volume labels 1733 */ 1734 if (dentp->deAttributes & ATTR_VOLUME) { 1735 chksum = -1; 1736 continue; 1737 } 1738 /* 1739 * This computation of d_ino must match 1740 * the computation of va_fileid in 1741 * msdosfs_getattr. 1742 */ 1743 if (dentp->deAttributes & ATTR_DIRECTORY) { 1744 d_ino = getushort(dentp->deStartCluster); 1745 if (FAT32(pmp)) 1746 d_ino |= getushort(dentp->deHighClust) << 16; 1747 /* if this is the root directory */ 1748 if (d_ino != MSDOSFSROOT) 1749 d_ino = xcntobn(pmp, d_ino) * dirsperblk; 1750 else if (FAT32(pmp)) 1751 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1752 * dirsperblk; 1753 else 1754 d_ino = 1; 1755 d_type = DT_DIR; 1756 } else { 1757 d_ino = offset / sizeof(struct direntry); 1758 d_type = DT_REG; 1759 } 1760 if (chksum != winChksum(dentp->deName)) { 1761 d_namlen = dos2unixfn(dentp->deName, 1762 (u_char *)d_name, 1763 dentp->deLowerCase | 1764 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1765 (LCASE_BASE | LCASE_EXT) : 0), 1766 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1767 pmp->pm_d2u, 1768 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1769 pmp->pm_ul); 1770 } 1771 chksum = -1; 1772 if (vop_write_dirent(&error, uio, d_ino, d_type, 1773 d_namlen, d_name)) { 1774 brelse(bp); 1775 goto out; 1776 } 1777 if (error) { 1778 brelse(bp); 1779 goto out; 1780 } 1781 1782 if (cookies) { 1783 *cookies++ = offset + sizeof(struct direntry); 1784 if (--ncookies <= 0) { 1785 brelse(bp); 1786 goto out; 1787 } 1788 } 1789 off = offset + sizeof(struct direntry); 1790 } 1791 brelse(bp); 1792 } 1793 out: 1794 if (d_name_storage != NULL) 1795 kfree(d_name_storage, M_TEMP); 1796 1797 /* Subtract unused cookies */ 1798 if (ap->a_ncookies) 1799 *ap->a_ncookies -= ncookies; 1800 1801 uio->uio_offset = off; 1802 1803 /* 1804 * Set the eofflag (NFS uses it) 1805 */ 1806 if (ap->a_eofflag) { 1807 if (dep->de_FileSize - (offset - bias) <= 0) 1808 *ap->a_eofflag = 1; 1809 else 1810 *ap->a_eofflag = 0; 1811 } 1812 done: 1813 vn_unlock(ap->a_vp); 1814 return (error); 1815 } 1816 1817 /* 1818 * vp - address of vnode file the file 1819 * bn - which cluster we are interested in mapping to a filesystem block number. 1820 * vpp - returns the vnode for the block special file holding the filesystem 1821 * containing the file of interest 1822 * bnp - address of where to return the filesystem relative block number 1823 * 1824 * msdosfs_bmap(struct vnode *a_vp, off_t a_loffset, 1825 * off_t *a_doffsetp, int *a_runp, int *a_runb) 1826 */ 1827 static int 1828 msdosfs_bmap(struct vop_bmap_args *ap) 1829 { 1830 struct denode *dep = VTODE(ap->a_vp); 1831 struct msdosfsmount *pmp = dep->de_pmp; 1832 daddr_t lbn; 1833 daddr_t dbn; 1834 int error; 1835 1836 if (ap->a_doffsetp == NULL) 1837 return (0); 1838 if (ap->a_runp) { 1839 /* 1840 * Sequential clusters should be counted here. 1841 */ 1842 *ap->a_runp = 0; 1843 } 1844 if (ap->a_runb) { 1845 *ap->a_runb = 0; 1846 } 1847 KKASSERT(((int)ap->a_loffset & ((1 << pmp->pm_cnshift) - 1)) == 0); 1848 lbn = de_off2cn(pmp, ap->a_loffset); 1849 error = pcbmap(dep, lbn, &dbn, NULL, NULL); 1850 if (error || dbn == (daddr_t)-1) { 1851 *ap->a_doffsetp = NOOFFSET; 1852 } else { 1853 *ap->a_doffsetp = de_bntodoff(pmp, dbn); 1854 } 1855 return (error); 1856 } 1857 1858 /* 1859 * msdosfs_strategy(struct vnode *a_vp, struct bio *a_bio) 1860 */ 1861 static int 1862 msdosfs_strategy(struct vop_strategy_args *ap) 1863 { 1864 struct bio *bio = ap->a_bio; 1865 struct bio *nbio; 1866 struct buf *bp = bio->bio_buf; 1867 struct vnode *vp = ap->a_vp; 1868 struct denode *dep = VTODE(vp); 1869 struct msdosfsmount *pmp = dep->de_pmp; 1870 int error = 0; 1871 daddr_t dblkno; 1872 1873 if (vp->v_type == VBLK || vp->v_type == VCHR) 1874 panic("msdosfs_strategy: spec"); 1875 /* 1876 * If we don't already know the filesystem relative block number 1877 * then get it using pcbmap(). If pcbmap() returns the block 1878 * number as -1 then we've got a hole in the file. DOS filesystems 1879 * don't allow files with holes, so we shouldn't ever see this. 1880 */ 1881 nbio = push_bio(bio); 1882 if (nbio->bio_offset == NOOFFSET) { 1883 error = pcbmap(dep, de_off2cn(pmp, bio->bio_offset), 1884 &dblkno, NULL, NULL); 1885 if (error) { 1886 bp->b_error = error; 1887 bp->b_flags |= B_ERROR; 1888 /* I/O was never started on nbio, must biodone(bio) */ 1889 biodone(bio); 1890 return (error); 1891 } 1892 if (dblkno == (daddr_t)-1) { 1893 nbio->bio_offset = NOOFFSET; 1894 vfs_bio_clrbuf(bp); 1895 } else { 1896 nbio->bio_offset = de_bntodoff(pmp, dblkno); 1897 } 1898 } 1899 if (nbio->bio_offset == NOOFFSET) { 1900 /* I/O was never started on nbio, must biodone(bio) */ 1901 biodone(bio); 1902 return (0); 1903 } 1904 /* 1905 * Read/write the block from/to the disk that contains the desired 1906 * file block. 1907 */ 1908 vn_strategy(dep->de_devvp, nbio); 1909 return (0); 1910 } 1911 1912 /* 1913 * msdosfs_print(struct vnode *vp) 1914 */ 1915 static int 1916 msdosfs_print(struct vop_print_args *ap) 1917 { 1918 struct denode *dep = VTODE(ap->a_vp); 1919 1920 kprintf( 1921 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1922 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1923 kprintf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1924 lockmgr_printinfo(&ap->a_vp->v_lock); 1925 kprintf("\n"); 1926 return (0); 1927 } 1928 1929 /* 1930 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1931 */ 1932 static int 1933 msdosfs_pathconf(struct vop_pathconf_args *ap) 1934 { 1935 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1936 1937 switch (ap->a_name) { 1938 case _PC_LINK_MAX: 1939 *ap->a_retval = 1; 1940 return (0); 1941 case _PC_NAME_MAX: 1942 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1943 return (0); 1944 case _PC_PATH_MAX: 1945 *ap->a_retval = PATH_MAX; 1946 return (0); 1947 case _PC_CHOWN_RESTRICTED: 1948 *ap->a_retval = 1; 1949 return (0); 1950 case _PC_NO_TRUNC: 1951 *ap->a_retval = 0; 1952 return (0); 1953 default: 1954 return (EINVAL); 1955 } 1956 /* NOTREACHED */ 1957 } 1958 1959 /* 1960 * get page routine 1961 * 1962 * XXX By default, wimp out... note that a_offset is ignored (and always 1963 * XXX has been). 1964 */ 1965 int 1966 msdosfs_getpages(struct vop_getpages_args *ap) 1967 { 1968 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1969 ap->a_reqpage); 1970 } 1971 1972 /* 1973 * put page routine 1974 * 1975 * XXX By default, wimp out... note that a_offset is ignored (and always 1976 * XXX has been). 1977 */ 1978 int 1979 msdosfs_putpages(struct vop_putpages_args *ap) 1980 { 1981 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1982 ap->a_sync, ap->a_rtvals); 1983 } 1984 1985 /* Global vfs data structures for msdosfs */ 1986 struct vop_ops msdosfs_vnode_vops = { 1987 .vop_default = vop_defaultop, 1988 .vop_access = msdosfs_access, 1989 .vop_bmap = msdosfs_bmap, 1990 .vop_old_lookup = msdosfs_lookup, 1991 .vop_open = msdosfs_open, 1992 .vop_close = msdosfs_close, 1993 .vop_old_create = msdosfs_create, 1994 .vop_fsync = msdosfs_fsync, 1995 .vop_getattr = msdosfs_getattr, 1996 .vop_inactive = msdosfs_inactive, 1997 .vop_old_link = msdosfs_link, 1998 .vop_old_mkdir = msdosfs_mkdir, 1999 .vop_old_mknod = msdosfs_mknod, 2000 .vop_pathconf = msdosfs_pathconf, 2001 .vop_print = msdosfs_print, 2002 .vop_read = msdosfs_read, 2003 .vop_readdir = msdosfs_readdir, 2004 .vop_reclaim = msdosfs_reclaim, 2005 .vop_old_remove = msdosfs_remove, 2006 .vop_old_rename = msdosfs_rename, 2007 .vop_old_rmdir = msdosfs_rmdir, 2008 .vop_setattr = msdosfs_setattr, 2009 .vop_strategy = msdosfs_strategy, 2010 .vop_old_symlink = msdosfs_symlink, 2011 .vop_write = msdosfs_write, 2012 .vop_getpages = msdosfs_getpages, 2013 .vop_putpages = msdosfs_putpages 2014 }; 2015