advfsops.c revision 1.6
1 /* $NetBSD: advfsops.c,v 1.6 2003/06/29 09:56:32 darrenr Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * Copyright (c) 1996 Matthias Scheler 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christian E. Hopps. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: advfsops.c,v 1.6 2003/06/29 09:56:32 darrenr Exp $"); 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_compat_netbsd.h" 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/vnode.h> 44 #include <sys/mount.h> 45 #include <sys/proc.h> 46 #include <sys/time.h> 47 #include <sys/malloc.h> 48 #include <sys/pool.h> 49 #include <sys/disklabel.h> 50 #include <miscfs/specfs/specdev.h> /* XXX */ 51 #include <sys/fcntl.h> 52 #include <sys/namei.h> 53 #include <sys/ioctl.h> 54 #include <sys/queue.h> 55 #include <sys/buf.h> 56 #include <sys/conf.h> 57 #include <fs/adosfs/adosfs.h> 58 59 void adosfs_init __P((void)); 60 void adosfs_reinit __P((void)); 61 void adosfs_done __P((void)); 62 int adosfs_mount __P((struct mount *, const char *, void *, struct nameidata *, 63 struct lwp *)); 64 int adosfs_start __P((struct mount *, int, struct proc *)); 65 int adosfs_unmount __P((struct mount *, int, struct proc *)); 66 int adosfs_root __P((struct mount *, struct vnode **)); 67 int adosfs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct lwp *)); 68 int adosfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 69 int adosfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 70 int adosfs_vget __P((struct mount *, ino_t, struct vnode **)); 71 int adosfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 72 int adosfs_checkexp __P((struct mount *, struct mbuf *, int *, 73 struct ucred **)); 74 int adosfs_vptofh __P((struct vnode *, struct fid *)); 75 76 int adosfs_mountfs __P((struct vnode *, struct mount *, struct proc *)); 77 int adosfs_loadbitmap __P((struct adosfsmount *)); 78 int adosfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 79 struct proc *)); 80 81 struct simplelock adosfs_hashlock; 82 83 struct pool adosfs_node_pool; 84 85 MALLOC_DEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 86 MALLOC_DEFINE(M_ANODE, "adosfs anode", "adosfs anode structures and tables"); 87 MALLOC_DEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 88 89 struct genfs_ops adosfs_genfsops = { 90 genfs_size, 91 }; 92 93 int (**adosfs_vnodeop_p) __P((void *)); 94 95 int 96 adosfs_mount(mp, path, data, ndp, l) 97 struct mount *mp; 98 const char *path; 99 void *data; 100 struct nameidata *ndp; 101 struct lwp *l; 102 { 103 struct vnode *devvp; 104 struct adosfs_args args; 105 struct adosfsmount *amp; 106 struct proc *p; 107 size_t size; 108 int error; 109 mode_t accessmode; 110 111 p = l->l_proc; 112 if (mp->mnt_flag & MNT_GETARGS) { 113 amp = VFSTOADOSFS(mp); 114 if (amp == NULL) 115 return EIO; 116 args.uid = amp->uid; 117 args.gid = amp->gid; 118 args.mask = amp->mask; 119 args.fspec = NULL; 120 vfs_showexport(mp, &args.export, &->export); 121 return copyout(&args, data, sizeof(args)); 122 } 123 error = copyin(data, &args, sizeof(struct adosfs_args)); 124 if (error) 125 return(error); 126 127 if ((mp->mnt_flag & MNT_RDONLY) == 0) 128 return (EROFS); 129 /* 130 * If updating, check whether changing from read-only to 131 * read/write; if there is no device name, that's all we do. 132 */ 133 if (mp->mnt_flag & MNT_UPDATE) { 134 amp = VFSTOADOSFS(mp); 135 if (args.fspec == 0) 136 return (vfs_export(mp, &->export, &args.export)); 137 } 138 /* 139 * Not an update, or updating the name: look up the name 140 * and verify that it refers to a sensible block device. 141 */ 142 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 143 if ((error = namei(ndp)) != 0) 144 return (error); 145 devvp = ndp->ni_vp; 146 147 if (devvp->v_type != VBLK) { 148 vrele(devvp); 149 return (ENOTBLK); 150 } 151 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 152 vrele(devvp); 153 return (ENXIO); 154 } 155 /* 156 * If mount by non-root, then verify that user has necessary 157 * permissions on the device. 158 */ 159 if (p->p_ucred->cr_uid != 0) { 160 accessmode = VREAD; 161 if ((mp->mnt_flag & MNT_RDONLY) == 0) 162 accessmode |= VWRITE; 163 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 164 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 165 if (error) { 166 vput(devvp); 167 return (error); 168 } 169 VOP_UNLOCK(devvp, 0); 170 } 171 /* MNT_UPDATE? */ 172 if ((error = adosfs_mountfs(devvp, mp, p)) != 0) { 173 vrele(devvp); 174 return (error); 175 } 176 amp = VFSTOADOSFS(mp); 177 amp->uid = args.uid; 178 amp->gid = args.gid; 179 amp->mask = args.mask; 180 return set_statfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 181 mp, p); 182 } 183 184 int 185 adosfs_mountfs(devvp, mp, l) 186 struct vnode *devvp; 187 struct mount *mp; 188 struct lwp *l; 189 { 190 struct proc *p = l->l_proc; 191 struct disklabel dl; 192 struct partition *parp; 193 struct adosfsmount *amp; 194 struct buf *bp; 195 struct vnode *rvp; 196 int error, part, i; 197 198 part = DISKPART(devvp->v_rdev); 199 amp = NULL; 200 201 /* 202 * Disallow multiple mounts of the same device. 203 * Disallow mounting of a device that is currently in use 204 * (except for root, which might share swap device for miniroot). 205 * Flush out any old buffers remaining from a previous use. 206 */ 207 if ((error = vfs_mountedon(devvp)) != 0) 208 return (error); 209 if (vcount(devvp) > 1 && devvp != rootvp) 210 return (EBUSY); 211 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, l, 0, 0)) != 0) 212 return (error); 213 214 /* 215 * open blkdev and read root block 216 */ 217 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, p)) != 0) 218 return (error); 219 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, l); 220 if (error) 221 goto fail; 222 223 parp = &dl.d_partitions[part]; 224 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 225 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 226 amp->mp = mp; 227 if (dl.d_type == DTYPE_FLOPPY) { 228 amp->bsize = dl.d_secsize; 229 amp->secsperblk = 1; 230 } 231 else { 232 amp->bsize = parp->p_fsize * parp->p_frag; 233 amp->secsperblk = parp->p_frag; 234 } 235 236 /* invalid fs ? */ 237 if (amp->secsperblk == 0) { 238 error = EINVAL; 239 goto fail; 240 } 241 242 bp = NULL; 243 if ((error = bread(devvp, (daddr_t)BBOFF, 244 amp->bsize, NOCRED, &bp)) != 0) { 245 brelse(bp); 246 goto fail; 247 } 248 amp->dostype = adoswordn(bp, 0); 249 brelse(bp); 250 251 /* basic sanity checks */ 252 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 253 error = EINVAL; 254 goto fail; 255 } 256 257 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 258 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 259 260 amp->nwords = amp->bsize >> 2; 261 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 262 amp->devvp = devvp; 263 264 mp->mnt_data = amp; 265 mp->mnt_stat.f_fsid.val[0] = (long)devvp->v_rdev; 266 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_ADOSFS); 267 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 268 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 269 mp->mnt_flag |= MNT_LOCAL; 270 271 /* 272 * init anode table. 273 */ 274 for (i = 0; i < ANODEHASHSZ; i++) 275 LIST_INIT(&->anodetab[i]); 276 277 /* 278 * get the root anode, if not a valid fs this will fail. 279 */ 280 if ((error = VFS_ROOT(mp, &rvp, l)) != 0) 281 goto fail; 282 /* allocate and load bitmap, set free space */ 283 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 284 M_ADOSFSBITMAP, M_WAITOK); 285 if (amp->bitmap) 286 adosfs_loadbitmap(amp); 287 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 288 /* 289 * Don't need the bitmap any more if it's read-only. 290 */ 291 free(amp->bitmap, M_ADOSFSBITMAP); 292 amp->bitmap = NULL; 293 } 294 vput(rvp); 295 296 return(0); 297 298 fail: 299 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 300 (void) VOP_CLOSE(devvp, FREAD, NOCRED, p); 301 VOP_UNLOCK(devvp, 0); 302 if (amp && amp->bitmap) 303 free(amp->bitmap, M_ADOSFSBITMAP); 304 if (amp) 305 free(amp, M_ADOSFSMNT); 306 return (error); 307 } 308 309 int 310 adosfs_start(mp, flags, l) 311 struct mount *mp; 312 int flags; 313 struct lwp *l; 314 { 315 316 return (0); 317 } 318 319 int 320 adosfs_unmount(mp, mntflags, l) 321 struct mount *mp; 322 int mntflags; 323 struct lwp *l; 324 { 325 struct adosfsmount *amp; 326 int error, flags; 327 328 flags = 0; 329 if (mntflags & MNT_FORCE) 330 flags |= FORCECLOSE; 331 if ((error = vflush(mp, NULLVP, flags)) != 0) 332 return (error); 333 amp = VFSTOADOSFS(mp); 334 if (amp->devvp->v_type != VBAD) 335 amp->devvp->v_specmountpoint = NULL; 336 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 337 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, l); 338 vput(amp->devvp); 339 if (amp->bitmap) 340 free(amp->bitmap, M_ADOSFSBITMAP); 341 free(amp, M_ADOSFSMNT); 342 mp->mnt_data = NULL; 343 mp->mnt_flag &= ~MNT_LOCAL; 344 return (error); 345 } 346 347 int 348 adosfs_root(mp, vpp) 349 struct mount *mp; 350 struct vnode **vpp; 351 { 352 struct vnode *nvp; 353 int error; 354 355 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 356 return (error); 357 /* XXX verify it's a root block? */ 358 *vpp = nvp; 359 return (0); 360 } 361 362 int 363 adosfs_statfs(mp, sbp, l) 364 struct mount *mp; 365 struct statfs *sbp; 366 struct lwp *l; 367 { 368 struct adosfsmount *amp; 369 370 amp = VFSTOADOSFS(mp); 371 #ifdef COMPAT_09 372 sbp->f_type = 16; 373 #else 374 sbp->f_type = 0; 375 #endif 376 sbp->f_bsize = amp->bsize; 377 sbp->f_iosize = amp->dbsize; 378 sbp->f_blocks = amp->numblks; 379 sbp->f_bfree = amp->freeblks; 380 sbp->f_bavail = amp->freeblks; 381 sbp->f_files = 0; /* who knows */ 382 sbp->f_ffree = 0; /* " " */ 383 copy_statfs_info(sbp, mp); 384 return (0); 385 } 386 387 /* 388 * lookup an anode, check mount's hash table if not found, create 389 * return locked and referenced al la vget(vp, 1); 390 */ 391 int 392 adosfs_vget(mp, an, vpp) 393 struct mount *mp; 394 ino_t an; 395 struct vnode **vpp; 396 { 397 struct adosfsmount *amp; 398 struct vnode *vp; 399 struct anode *ap; 400 struct buf *bp; 401 char *nam, *tmp; 402 int namlen, error; 403 404 error = 0; 405 amp = VFSTOADOSFS(mp); 406 bp = NULL; 407 408 /* 409 * check hash table. we are done if found 410 */ 411 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 412 return (0); 413 414 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 415 if (error) 416 return (error); 417 418 /* 419 * setup, insert in hash, and lock before io. 420 */ 421 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 422 memset(ap, 0, sizeof(struct anode)); 423 ap->vp = vp; 424 ap->amp = amp; 425 ap->block = an; 426 ap->nwords = amp->nwords; 427 adosfs_ainshash(amp, ap); 428 429 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 430 amp->bsize, NOCRED, &bp)) != 0) { 431 brelse(bp); 432 vput(vp); 433 return (error); 434 } 435 436 /* 437 * get type and fill rest in based on that. 438 */ 439 switch (ap->type = adosfs_getblktype(amp, bp)) { 440 case AROOT: 441 vp->v_type = VDIR; 442 vp->v_flag |= VROOT; 443 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 444 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 445 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 446 ap->created.days = adoswordn(bp, ap->nwords - 7); 447 ap->created.mins = adoswordn(bp, ap->nwords - 6); 448 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 449 break; 450 case ALDIR: 451 case ADIR: 452 vp->v_type = VDIR; 453 break; 454 case ALFILE: 455 case AFILE: 456 vp->v_type = VREG; 457 ap->fsize = adoswordn(bp, ap->nwords - 47); 458 break; 459 case ASLINK: /* XXX soft link */ 460 vp->v_type = VLNK; 461 /* 462 * convert from BCPL string and 463 * from: "part:dir/file" to: "/part/dir/file" 464 */ 465 nam = bp->b_data + (6 * sizeof(long)); 466 namlen = strlen(nam); 467 tmp = nam; 468 while (*tmp && *tmp != ':') 469 tmp++; 470 if (*tmp == 0) { 471 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 472 memcpy(ap->slinkto, nam, namlen); 473 } else if (*nam == ':') { 474 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 475 memcpy(ap->slinkto, nam, namlen); 476 ap->slinkto[0] = '/'; 477 } else { 478 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 479 ap->slinkto[0] = '/'; 480 memcpy(&ap->slinkto[1], nam, namlen); 481 ap->slinkto[tmp - nam + 1] = '/'; 482 namlen++; 483 } 484 ap->slinkto[namlen] = 0; 485 ap->fsize = namlen; 486 break; 487 default: 488 brelse(bp); 489 vput(vp); 490 return (EINVAL); 491 } 492 493 /* 494 * Get appropriate data from this block; hard link needs 495 * to get other data from the "real" block. 496 */ 497 498 /* 499 * copy in name (from original block) 500 */ 501 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 502 namlen = *(u_char *)nam++; 503 if (namlen > 30) { 504 #ifdef DIAGNOSTIC 505 printf("adosfs: aget: name length too long blk %d\n", an); 506 #endif 507 brelse(bp); 508 vput(vp); 509 return (EINVAL); 510 } 511 memcpy(ap->name, nam, namlen); 512 ap->name[namlen] = 0; 513 514 /* 515 * if dir alloc hash table and copy it in 516 */ 517 if (vp->v_type == VDIR) { 518 int i; 519 520 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 521 ap->ntabent = ANODETABENT(ap); 522 ap->tabi = (int *)&ap->tab[ap->ntabent]; 523 memset(ap->tabi, 0, ANODETABSZ(ap)); 524 for (i = 0; i < ap->ntabent; i++) 525 ap->tab[i] = adoswordn(bp, i + 6); 526 } 527 528 /* 529 * misc. 530 */ 531 ap->pblock = adoswordn(bp, ap->nwords - 3); 532 ap->hashf = adoswordn(bp, ap->nwords - 4); 533 ap->linknext = adoswordn(bp, ap->nwords - 10); 534 ap->linkto = adoswordn(bp, ap->nwords - 11); 535 536 /* 537 * setup last indirect block cache. 538 */ 539 ap->lastlindblk = 0; 540 if (ap->type == AFILE) { 541 ap->lastindblk = ap->block; 542 if (adoswordn(bp, ap->nwords - 10)) 543 ap->linkto = ap->block; 544 } else if (ap->type == ALFILE) { 545 ap->lastindblk = ap->linkto; 546 brelse(bp); 547 bp = NULL; 548 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 549 amp->bsize, NOCRED, &bp); 550 if (error) { 551 brelse(bp); 552 vput(vp); 553 return (error); 554 } 555 ap->fsize = adoswordn(bp, ap->nwords - 47); 556 /* 557 * Should ap->block be set to the real file header block? 558 */ 559 ap->block = ap->linkto; 560 } 561 562 if (ap->type == AROOT) { 563 ap->adprot = 15; 564 ap->uid = amp->uid; 565 ap->gid = amp->gid; 566 } else { 567 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 568 /* 569 * ADOS directories do not have a `x' protection bit as 570 * it is known in VFS; this functionality is fulfilled 571 * by the ADOS `r' bit. 572 * 573 * To retain the ADOS behaviour, fake execute permissions 574 * in that case. 575 */ 576 if ((ap->type == ADIR || ap->type == ALDIR) && 577 (ap->adprot & 0x00000008) == 0) 578 ap->adprot &= ~0x00000002; 579 580 /* 581 * Get uid/gid from extensions in file header 582 * (really need to know if this is a muFS partition) 583 */ 584 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 585 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 586 if (ap->uid || ap->gid) { 587 if (ap->uid == 0xffff) 588 ap->uid = 0; 589 if (ap->gid == 0xffff) 590 ap->gid = 0; 591 ap->adprot |= 0x40000000; /* Kludge */ 592 } 593 else { 594 /* 595 * uid & gid extension don't exist, 596 * so use the mount-point uid/gid 597 */ 598 ap->uid = amp->uid; 599 ap->gid = amp->gid; 600 } 601 } 602 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 603 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 604 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 605 606 genfs_node_init(vp, &adosfs_genfsops); 607 *vpp = vp; 608 brelse(bp); 609 vp->v_size = ap->fsize; 610 return (0); 611 } 612 613 /* 614 * Load the bitmap into memory, and count the number of available 615 * blocks. 616 * The bitmap will be released if the filesystem is read-only; it's 617 * only needed to find the free space. 618 */ 619 int 620 adosfs_loadbitmap(amp) 621 struct adosfsmount *amp; 622 { 623 struct buf *bp, *mapbp; 624 u_long bn; 625 int blkix, endix, mapix; 626 int bmsize; 627 int error; 628 629 bp = mapbp = NULL; 630 bn = amp->rootb; 631 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 632 NOCRED, &bp)) != 0) { 633 brelse(bp); 634 return (error); 635 } 636 blkix = amp->nwords - 49; 637 endix = amp->nwords - 24; 638 mapix = 0; 639 bmsize = (amp->numblks + 31) / 32; 640 while (mapix < bmsize) { 641 int n; 642 u_long bits; 643 644 if (adoswordn(bp, blkix) == 0) 645 break; 646 if (mapbp != NULL) 647 brelse(mapbp); 648 if ((error = bread(amp->devvp, 649 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 650 NOCRED, &mapbp)) != 0) 651 break; 652 if (adoscksum(mapbp, amp->nwords)) { 653 #ifdef DIAGNOSTIC 654 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 655 adoswordn(bp, blkix)); 656 #endif 657 /* XXX Force read-only? Set free space 0? */ 658 break; 659 } 660 n = 1; 661 while (n < amp->nwords && mapix < bmsize) { 662 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 663 ++n; 664 if (mapix == bmsize && amp->numblks & 31) 665 bits &= ~(0xffffffff << (amp->numblks & 31)); 666 while (bits) { 667 if (bits & 1) 668 ++amp->freeblks; 669 bits >>= 1; 670 } 671 } 672 ++blkix; 673 if (mapix < bmsize && blkix == endix) { 674 bn = adoswordn(bp, blkix); 675 brelse(bp); 676 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 677 amp->bsize, NOCRED, &bp)) != 0) 678 break; 679 /* 680 * Why is there no checksum on these blocks? 681 */ 682 blkix = 0; 683 endix = amp->nwords - 1; 684 } 685 } 686 if (bp) 687 brelse(bp); 688 if (mapbp) 689 brelse(mapbp); 690 return (error); 691 } 692 693 694 /* 695 * File handle to vnode 696 * 697 * Have to be really careful about stale file handles: 698 * - check that the inode number is in range 699 * - call iget() to get the locked inode 700 * - check for an unallocated inode (i_mode == 0) 701 * - check that the generation number matches 702 */ 703 704 struct ifid { 705 ushort ifid_len; 706 ushort ifid_pad; 707 int ifid_ino; 708 long ifid_start; 709 }; 710 711 int 712 adosfs_fhtovp(mp, fhp, vpp) 713 struct mount *mp; 714 struct fid *fhp; 715 struct vnode **vpp; 716 { 717 struct ifid *ifhp = (struct ifid *)fhp; 718 #if 0 719 struct anode *ap; 720 #endif 721 struct vnode *nvp; 722 int error; 723 724 #ifdef ADOSFS_DIAGNOSTIC 725 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 726 #endif 727 728 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 729 *vpp = NULLVP; 730 return (error); 731 } 732 #if 0 733 ap = VTOA(nvp); 734 if (ap->inode.iso_mode == 0) { 735 vput(nvp); 736 *vpp = NULLVP; 737 return (ESTALE); 738 } 739 #endif 740 *vpp = nvp; 741 return(0); 742 } 743 744 int 745 adosfs_checkexp(mp, nam, exflagsp, credanonp) 746 struct mount *mp; 747 struct mbuf *nam; 748 int *exflagsp; 749 struct ucred **credanonp; 750 { 751 struct adosfsmount *amp = VFSTOADOSFS(mp); 752 #if 0 753 struct anode *ap; 754 #endif 755 struct netcred *np; 756 757 #ifdef ADOSFS_DIAGNOSTIC 758 printf("adcheckexp(%x, %x, %x)\n", mp, nam, exflagsp); 759 #endif 760 761 /* 762 * Get the export permission structure for this <mp, client> tuple. 763 */ 764 np = vfs_export_lookup(mp, &->export, nam); 765 if (np == NULL) 766 return (EACCES); 767 768 *exflagsp = np->netc_exflags; 769 *credanonp = &np->netc_anon; 770 return(0); 771 } 772 773 int 774 adosfs_vptofh(vp, fhp) 775 struct vnode *vp; 776 struct fid *fhp; 777 { 778 struct anode *ap = VTOA(vp); 779 struct ifid *ifhp; 780 781 ifhp = (struct ifid *)fhp; 782 ifhp->ifid_len = sizeof(struct ifid); 783 784 ifhp->ifid_ino = ap->block; 785 ifhp->ifid_start = ap->block; 786 787 #ifdef ADOSFS_DIAGNOSTIC 788 printf("advptofh(%x, %x)\n", vp, fhp); 789 #endif 790 return(0); 791 } 792 793 int 794 adosfs_quotactl(mp, cmds, uid, arg, l) 795 struct mount *mp; 796 int cmds; 797 uid_t uid; 798 caddr_t arg; 799 struct lwp *l; 800 { 801 return(EOPNOTSUPP); 802 } 803 804 int 805 adosfs_sync(mp, waitfor, uc, p) 806 struct mount *mp; 807 int waitfor; 808 struct ucred *uc; 809 struct proc *p; 810 { 811 #ifdef ADOSFS_DIAGNOSTIC 812 printf("ad_sync(%x, %x)\n", mp, waitfor); 813 #endif 814 return(0); 815 } 816 817 void 818 adosfs_init() 819 { 820 simple_lock_init(&adosfs_hashlock); 821 822 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, 823 "adosndpl", &pool_allocator_nointr); 824 } 825 826 void 827 adosfs_done() 828 { 829 pool_destroy(&adosfs_node_pool); 830 } 831 832 int 833 adosfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 834 int *name; 835 u_int namelen; 836 void *oldp; 837 size_t *oldlenp; 838 void *newp; 839 size_t newlen; 840 struct proc *p; 841 { 842 return (EOPNOTSUPP); 843 } 844 845 /* 846 * vfs generic function call table 847 */ 848 849 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 850 851 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 852 &adosfs_vnodeop_opv_desc, 853 NULL, 854 }; 855 856 struct vfsops adosfs_vfsops = { 857 MOUNT_ADOSFS, 858 adosfs_mount, 859 adosfs_start, 860 adosfs_unmount, 861 adosfs_root, 862 adosfs_quotactl, 863 adosfs_statfs, 864 adosfs_sync, 865 adosfs_vget, 866 adosfs_fhtovp, 867 adosfs_vptofh, 868 adosfs_init, 869 NULL, 870 adosfs_done, 871 adosfs_sysctl, 872 NULL, /* vfs_mountroot */ 873 adosfs_checkexp, 874 adosfs_vnodeopv_descs, 875 }; 876
Indexes created Thu Sep 25 06:09:39 GMT 2025