advfsops.c revision 1.5
1 /* $NetBSD: advfsops.c,v 1.5 2003/06/28 14:21:48 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 1.5 2003/06/28 14:21:48 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, p) 186 struct vnode *devvp; 187 struct mount *mp; 188 struct proc *p; 189 { 190 struct disklabel dl; 191 struct partition *parp; 192 struct adosfsmount *amp; 193 struct buf *bp; 194 struct vnode *rvp; 195 int error, part, i; 196 197 part = DISKPART(devvp->v_rdev); 198 amp = NULL; 199 200 /* 201 * Disallow multiple mounts of the same device. 202 * Disallow mounting of a device that is currently in use 203 * (except for root, which might share swap device for miniroot). 204 * Flush out any old buffers remaining from a previous use. 205 */ 206 if ((error = vfs_mountedon(devvp)) != 0) 207 return (error); 208 if (vcount(devvp) > 1 && devvp != rootvp) 209 return (EBUSY); 210 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 211 return (error); 212 213 /* 214 * open blkdev and read root block 215 */ 216 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, p)) != 0) 217 return (error); 218 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, p); 219 if (error) 220 goto fail; 221 222 parp = &dl.d_partitions[part]; 223 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 224 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 225 amp->mp = mp; 226 if (dl.d_type == DTYPE_FLOPPY) { 227 amp->bsize = dl.d_secsize; 228 amp->secsperblk = 1; 229 } 230 else { 231 amp->bsize = parp->p_fsize * parp->p_frag; 232 amp->secsperblk = parp->p_frag; 233 } 234 235 /* invalid fs ? */ 236 if (amp->secsperblk == 0) { 237 error = EINVAL; 238 goto fail; 239 } 240 241 bp = NULL; 242 if ((error = bread(devvp, (daddr_t)BBOFF, 243 amp->bsize, NOCRED, &bp)) != 0) { 244 brelse(bp); 245 goto fail; 246 } 247 amp->dostype = adoswordn(bp, 0); 248 brelse(bp); 249 250 /* basic sanity checks */ 251 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 252 error = EINVAL; 253 goto fail; 254 } 255 256 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 257 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 258 259 amp->nwords = amp->bsize >> 2; 260 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 261 amp->devvp = devvp; 262 263 mp->mnt_data = amp; 264 mp->mnt_stat.f_fsid.val[0] = (long)devvp->v_rdev; 265 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_ADOSFS); 266 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 267 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 268 mp->mnt_flag |= MNT_LOCAL; 269 270 /* 271 * init anode table. 272 */ 273 for (i = 0; i < ANODEHASHSZ; i++) 274 LIST_INIT(&->anodetab[i]); 275 276 /* 277 * get the root anode, if not a valid fs this will fail. 278 */ 279 if ((error = VFS_ROOT(mp, &rvp)) != 0) 280 goto fail; 281 /* allocate and load bitmap, set free space */ 282 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 283 M_ADOSFSBITMAP, M_WAITOK); 284 if (amp->bitmap) 285 adosfs_loadbitmap(amp); 286 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 287 /* 288 * Don't need the bitmap any more if it's read-only. 289 */ 290 free(amp->bitmap, M_ADOSFSBITMAP); 291 amp->bitmap = NULL; 292 } 293 vput(rvp); 294 295 return(0); 296 297 fail: 298 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 299 (void) VOP_CLOSE(devvp, FREAD, NOCRED, p); 300 VOP_UNLOCK(devvp, 0); 301 if (amp && amp->bitmap) 302 free(amp->bitmap, M_ADOSFSBITMAP); 303 if (amp) 304 free(amp, M_ADOSFSMNT); 305 return (error); 306 } 307 308 int 309 adosfs_start(mp, flags, p) 310 struct mount *mp; 311 int flags; 312 struct proc *p; 313 { 314 315 return (0); 316 } 317 318 int 319 adosfs_unmount(mp, mntflags, p) 320 struct mount *mp; 321 int mntflags; 322 struct proc *p; 323 { 324 struct adosfsmount *amp; 325 int error, flags; 326 327 flags = 0; 328 if (mntflags & MNT_FORCE) 329 flags |= FORCECLOSE; 330 if ((error = vflush(mp, NULLVP, flags)) != 0) 331 return (error); 332 amp = VFSTOADOSFS(mp); 333 if (amp->devvp->v_type != VBAD) 334 amp->devvp->v_specmountpoint = NULL; 335 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 336 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, p); 337 vput(amp->devvp); 338 if (amp->bitmap) 339 free(amp->bitmap, M_ADOSFSBITMAP); 340 free(amp, M_ADOSFSMNT); 341 mp->mnt_data = NULL; 342 mp->mnt_flag &= ~MNT_LOCAL; 343 return (error); 344 } 345 346 int 347 adosfs_root(mp, vpp) 348 struct mount *mp; 349 struct vnode **vpp; 350 { 351 struct vnode *nvp; 352 int error; 353 354 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 355 return (error); 356 /* XXX verify it's a root block? */ 357 *vpp = nvp; 358 return (0); 359 } 360 361 int 362 adosfs_statfs(mp, sbp, p) 363 struct mount *mp; 364 struct statfs *sbp; 365 struct proc *p; 366 { 367 struct adosfsmount *amp; 368 369 amp = VFSTOADOSFS(mp); 370 #ifdef COMPAT_09 371 sbp->f_type = 16; 372 #else 373 sbp->f_type = 0; 374 #endif 375 sbp->f_bsize = amp->bsize; 376 sbp->f_iosize = amp->dbsize; 377 sbp->f_blocks = amp->numblks; 378 sbp->f_bfree = amp->freeblks; 379 sbp->f_bavail = amp->freeblks; 380 sbp->f_files = 0; /* who knows */ 381 sbp->f_ffree = 0; /* " " */ 382 copy_statfs_info(sbp, mp); 383 return (0); 384 } 385 386 /* 387 * lookup an anode, check mount's hash table if not found, create 388 * return locked and referenced al la vget(vp, 1); 389 */ 390 int 391 adosfs_vget(mp, an, vpp) 392 struct mount *mp; 393 ino_t an; 394 struct vnode **vpp; 395 { 396 struct adosfsmount *amp; 397 struct vnode *vp; 398 struct anode *ap; 399 struct buf *bp; 400 char *nam, *tmp; 401 int namlen, error; 402 403 error = 0; 404 amp = VFSTOADOSFS(mp); 405 bp = NULL; 406 407 /* 408 * check hash table. we are done if found 409 */ 410 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 411 return (0); 412 413 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 414 if (error) 415 return (error); 416 417 /* 418 * setup, insert in hash, and lock before io. 419 */ 420 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 421 memset(ap, 0, sizeof(struct anode)); 422 ap->vp = vp; 423 ap->amp = amp; 424 ap->block = an; 425 ap->nwords = amp->nwords; 426 adosfs_ainshash(amp, ap); 427 428 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 429 amp->bsize, NOCRED, &bp)) != 0) { 430 brelse(bp); 431 vput(vp); 432 return (error); 433 } 434 435 /* 436 * get type and fill rest in based on that. 437 */ 438 switch (ap->type = adosfs_getblktype(amp, bp)) { 439 case AROOT: 440 vp->v_type = VDIR; 441 vp->v_flag |= VROOT; 442 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 443 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 444 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 445 ap->created.days = adoswordn(bp, ap->nwords - 7); 446 ap->created.mins = adoswordn(bp, ap->nwords - 6); 447 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 448 break; 449 case ALDIR: 450 case ADIR: 451 vp->v_type = VDIR; 452 break; 453 case ALFILE: 454 case AFILE: 455 vp->v_type = VREG; 456 ap->fsize = adoswordn(bp, ap->nwords - 47); 457 break; 458 case ASLINK: /* XXX soft link */ 459 vp->v_type = VLNK; 460 /* 461 * convert from BCPL string and 462 * from: "part:dir/file" to: "/part/dir/file" 463 */ 464 nam = bp->b_data + (6 * sizeof(long)); 465 namlen = strlen(nam); 466 tmp = nam; 467 while (*tmp && *tmp != ':') 468 tmp++; 469 if (*tmp == 0) { 470 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 471 memcpy(ap->slinkto, nam, namlen); 472 } else if (*nam == ':') { 473 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 474 memcpy(ap->slinkto, nam, namlen); 475 ap->slinkto[0] = '/'; 476 } else { 477 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 478 ap->slinkto[0] = '/'; 479 memcpy(&ap->slinkto[1], nam, namlen); 480 ap->slinkto[tmp - nam + 1] = '/'; 481 namlen++; 482 } 483 ap->slinkto[namlen] = 0; 484 ap->fsize = namlen; 485 break; 486 default: 487 brelse(bp); 488 vput(vp); 489 return (EINVAL); 490 } 491 492 /* 493 * Get appropriate data from this block; hard link needs 494 * to get other data from the "real" block. 495 */ 496 497 /* 498 * copy in name (from original block) 499 */ 500 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 501 namlen = *(u_char *)nam++; 502 if (namlen > 30) { 503 #ifdef DIAGNOSTIC 504 printf("adosfs: aget: name length too long blk %d\n", an); 505 #endif 506 brelse(bp); 507 vput(vp); 508 return (EINVAL); 509 } 510 memcpy(ap->name, nam, namlen); 511 ap->name[namlen] = 0; 512 513 /* 514 * if dir alloc hash table and copy it in 515 */ 516 if (vp->v_type == VDIR) { 517 int i; 518 519 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 520 ap->ntabent = ANODETABENT(ap); 521 ap->tabi = (int *)&ap->tab[ap->ntabent]; 522 memset(ap->tabi, 0, ANODETABSZ(ap)); 523 for (i = 0; i < ap->ntabent; i++) 524 ap->tab[i] = adoswordn(bp, i + 6); 525 } 526 527 /* 528 * misc. 529 */ 530 ap->pblock = adoswordn(bp, ap->nwords - 3); 531 ap->hashf = adoswordn(bp, ap->nwords - 4); 532 ap->linknext = adoswordn(bp, ap->nwords - 10); 533 ap->linkto = adoswordn(bp, ap->nwords - 11); 534 535 /* 536 * setup last indirect block cache. 537 */ 538 ap->lastlindblk = 0; 539 if (ap->type == AFILE) { 540 ap->lastindblk = ap->block; 541 if (adoswordn(bp, ap->nwords - 10)) 542 ap->linkto = ap->block; 543 } else if (ap->type == ALFILE) { 544 ap->lastindblk = ap->linkto; 545 brelse(bp); 546 bp = NULL; 547 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 548 amp->bsize, NOCRED, &bp); 549 if (error) { 550 brelse(bp); 551 vput(vp); 552 return (error); 553 } 554 ap->fsize = adoswordn(bp, ap->nwords - 47); 555 /* 556 * Should ap->block be set to the real file header block? 557 */ 558 ap->block = ap->linkto; 559 } 560 561 if (ap->type == AROOT) { 562 ap->adprot = 15; 563 ap->uid = amp->uid; 564 ap->gid = amp->gid; 565 } else { 566 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 567 /* 568 * ADOS directories do not have a `x' protection bit as 569 * it is known in VFS; this functionality is fulfilled 570 * by the ADOS `r' bit. 571 * 572 * To retain the ADOS behaviour, fake execute permissions 573 * in that case. 574 */ 575 if ((ap->type == ADIR || ap->type == ALDIR) && 576 (ap->adprot & 0x00000008) == 0) 577 ap->adprot &= ~0x00000002; 578 579 /* 580 * Get uid/gid from extensions in file header 581 * (really need to know if this is a muFS partition) 582 */ 583 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 584 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 585 if (ap->uid || ap->gid) { 586 if (ap->uid == 0xffff) 587 ap->uid = 0; 588 if (ap->gid == 0xffff) 589 ap->gid = 0; 590 ap->adprot |= 0x40000000; /* Kludge */ 591 } 592 else { 593 /* 594 * uid & gid extension don't exist, 595 * so use the mount-point uid/gid 596 */ 597 ap->uid = amp->uid; 598 ap->gid = amp->gid; 599 } 600 } 601 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 602 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 603 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 604 605 genfs_node_init(vp, &adosfs_genfsops); 606 *vpp = vp; 607 brelse(bp); 608 vp->v_size = ap->fsize; 609 return (0); 610 } 611 612 /* 613 * Load the bitmap into memory, and count the number of available 614 * blocks. 615 * The bitmap will be released if the filesystem is read-only; it's 616 * only needed to find the free space. 617 */ 618 int 619 adosfs_loadbitmap(amp) 620 struct adosfsmount *amp; 621 { 622 struct buf *bp, *mapbp; 623 u_long bn; 624 int blkix, endix, mapix; 625 int bmsize; 626 int error; 627 628 bp = mapbp = NULL; 629 bn = amp->rootb; 630 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 631 NOCRED, &bp)) != 0) { 632 brelse(bp); 633 return (error); 634 } 635 blkix = amp->nwords - 49; 636 endix = amp->nwords - 24; 637 mapix = 0; 638 bmsize = (amp->numblks + 31) / 32; 639 while (mapix < bmsize) { 640 int n; 641 u_long bits; 642 643 if (adoswordn(bp, blkix) == 0) 644 break; 645 if (mapbp != NULL) 646 brelse(mapbp); 647 if ((error = bread(amp->devvp, 648 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 649 NOCRED, &mapbp)) != 0) 650 break; 651 if (adoscksum(mapbp, amp->nwords)) { 652 #ifdef DIAGNOSTIC 653 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 654 adoswordn(bp, blkix)); 655 #endif 656 /* XXX Force read-only? Set free space 0? */ 657 break; 658 } 659 n = 1; 660 while (n < amp->nwords && mapix < bmsize) { 661 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 662 ++n; 663 if (mapix == bmsize && amp->numblks & 31) 664 bits &= ~(0xffffffff << (amp->numblks & 31)); 665 while (bits) { 666 if (bits & 1) 667 ++amp->freeblks; 668 bits >>= 1; 669 } 670 } 671 ++blkix; 672 if (mapix < bmsize && blkix == endix) { 673 bn = adoswordn(bp, blkix); 674 brelse(bp); 675 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 676 amp->bsize, NOCRED, &bp)) != 0) 677 break; 678 /* 679 * Why is there no checksum on these blocks? 680 */ 681 blkix = 0; 682 endix = amp->nwords - 1; 683 } 684 } 685 if (bp) 686 brelse(bp); 687 if (mapbp) 688 brelse(mapbp); 689 return (error); 690 } 691 692 693 /* 694 * File handle to vnode 695 * 696 * Have to be really careful about stale file handles: 697 * - check that the inode number is in range 698 * - call iget() to get the locked inode 699 * - check for an unallocated inode (i_mode == 0) 700 * - check that the generation number matches 701 */ 702 703 struct ifid { 704 ushort ifid_len; 705 ushort ifid_pad; 706 int ifid_ino; 707 long ifid_start; 708 }; 709 710 int 711 adosfs_fhtovp(mp, fhp, vpp) 712 struct mount *mp; 713 struct fid *fhp; 714 struct vnode **vpp; 715 { 716 struct ifid *ifhp = (struct ifid *)fhp; 717 #if 0 718 struct anode *ap; 719 #endif 720 struct vnode *nvp; 721 int error; 722 723 #ifdef ADOSFS_DIAGNOSTIC 724 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 725 #endif 726 727 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 728 *vpp = NULLVP; 729 return (error); 730 } 731 #if 0 732 ap = VTOA(nvp); 733 if (ap->inode.iso_mode == 0) { 734 vput(nvp); 735 *vpp = NULLVP; 736 return (ESTALE); 737 } 738 #endif 739 *vpp = nvp; 740 return(0); 741 } 742 743 int 744 adosfs_checkexp(mp, nam, exflagsp, credanonp) 745 struct mount *mp; 746 struct mbuf *nam; 747 int *exflagsp; 748 struct ucred **credanonp; 749 { 750 struct adosfsmount *amp = VFSTOADOSFS(mp); 751 #if 0 752 struct anode *ap; 753 #endif 754 struct netcred *np; 755 756 #ifdef ADOSFS_DIAGNOSTIC 757 printf("adcheckexp(%x, %x, %x)\n", mp, nam, exflagsp); 758 #endif 759 760 /* 761 * Get the export permission structure for this <mp, client> tuple. 762 */ 763 np = vfs_export_lookup(mp, &->export, nam); 764 if (np == NULL) 765 return (EACCES); 766 767 *exflagsp = np->netc_exflags; 768 *credanonp = &np->netc_anon; 769 return(0); 770 } 771 772 int 773 adosfs_vptofh(vp, fhp) 774 struct vnode *vp; 775 struct fid *fhp; 776 { 777 struct anode *ap = VTOA(vp); 778 struct ifid *ifhp; 779 780 ifhp = (struct ifid *)fhp; 781 ifhp->ifid_len = sizeof(struct ifid); 782 783 ifhp->ifid_ino = ap->block; 784 ifhp->ifid_start = ap->block; 785 786 #ifdef ADOSFS_DIAGNOSTIC 787 printf("advptofh(%x, %x)\n", vp, fhp); 788 #endif 789 return(0); 790 } 791 792 int 793 adosfs_quotactl(mp, cmds, uid, arg, l) 794 struct mount *mp; 795 int cmds; 796 uid_t uid; 797 caddr_t arg; 798 struct lwp *l; 799 { 800 return(EOPNOTSUPP); 801 } 802 803 int 804 adosfs_sync(mp, waitfor, uc, p) 805 struct mount *mp; 806 int waitfor; 807 struct ucred *uc; 808 struct proc *p; 809 { 810 #ifdef ADOSFS_DIAGNOSTIC 811 printf("ad_sync(%x, %x)\n", mp, waitfor); 812 #endif 813 return(0); 814 } 815 816 void 817 adosfs_init() 818 { 819 simple_lock_init(&adosfs_hashlock); 820 821 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, 822 "adosndpl", &pool_allocator_nointr); 823 } 824 825 void 826 adosfs_done() 827 { 828 pool_destroy(&adosfs_node_pool); 829 } 830 831 int 832 adosfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 833 int *name; 834 u_int namelen; 835 void *oldp; 836 size_t *oldlenp; 837 void *newp; 838 size_t newlen; 839 struct proc *p; 840 { 841 return (EOPNOTSUPP); 842 } 843 844 /* 845 * vfs generic function call table 846 */ 847 848 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 849 850 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 851 &adosfs_vnodeop_opv_desc, 852 NULL, 853 }; 854 855 struct vfsops adosfs_vfsops = { 856 MOUNT_ADOSFS, 857 adosfs_mount, 858 adosfs_start, 859 adosfs_unmount, 860 adosfs_root, 861 adosfs_quotactl, 862 adosfs_statfs, 863 adosfs_sync, 864 adosfs_vget, 865 adosfs_fhtovp, 866 adosfs_vptofh, 867 adosfs_init, 868 NULL, 869 adosfs_done, 870 adosfs_sysctl, 871 NULL, /* vfs_mountroot */ 872 adosfs_checkexp, 873 adosfs_vnodeopv_descs, 874 }; 875
Indexes created Fri Sep 26 08:10:20 GMT 2025