advfsops.c revision 1.4
1 /* $NetBSD: advfsops.c,v 1.4 2003/04/16 21:44:18 christos 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 1.4 2003/04/16 21:44:18 christos 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 proc *)); 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 proc *)); 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, p) 97 struct mount *mp; 98 const char *path; 99 void *data; 100 struct nameidata *ndp; 101 struct proc *p; 102 { 103 struct vnode *devvp; 104 struct adosfs_args args; 105 struct adosfsmount *amp; 106 int error; 107 mode_t accessmode; 108 109 if (mp->mnt_flag & MNT_GETARGS) { 110 amp = VFSTOADOSFS(mp); 111 if (amp == NULL) 112 return EIO; 113 args.uid = amp->uid; 114 args.gid = amp->gid; 115 args.mask = amp->mask; 116 args.fspec = NULL; 117 vfs_showexport(mp, &args.export, &->export); 118 return copyout(&args, data, sizeof(args)); 119 } 120 error = copyin(data, &args, sizeof(struct adosfs_args)); 121 if (error) 122 return(error); 123 124 if ((mp->mnt_flag & MNT_RDONLY) == 0) 125 return (EROFS); 126 /* 127 * If updating, check whether changing from read-only to 128 * read/write; if there is no device name, that's all we do. 129 */ 130 if (mp->mnt_flag & MNT_UPDATE) { 131 amp = VFSTOADOSFS(mp); 132 if (args.fspec == 0) 133 return (vfs_export(mp, &->export, &args.export)); 134 } 135 /* 136 * Not an update, or updating the name: look up the name 137 * and verify that it refers to a sensible block device. 138 */ 139 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 140 if ((error = namei(ndp)) != 0) 141 return (error); 142 devvp = ndp->ni_vp; 143 144 if (devvp->v_type != VBLK) { 145 vrele(devvp); 146 return (ENOTBLK); 147 } 148 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 149 vrele(devvp); 150 return (ENXIO); 151 } 152 /* 153 * If mount by non-root, then verify that user has necessary 154 * permissions on the device. 155 */ 156 if (p->p_ucred->cr_uid != 0) { 157 accessmode = VREAD; 158 if ((mp->mnt_flag & MNT_RDONLY) == 0) 159 accessmode |= VWRITE; 160 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 161 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 162 if (error) { 163 vput(devvp); 164 return (error); 165 } 166 VOP_UNLOCK(devvp, 0); 167 } 168 /* MNT_UPDATE? */ 169 if ((error = adosfs_mountfs(devvp, mp, p)) != 0) { 170 vrele(devvp); 171 return (error); 172 } 173 amp = VFSTOADOSFS(mp); 174 amp->uid = args.uid; 175 amp->gid = args.gid; 176 amp->mask = args.mask; 177 return set_statfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 178 mp, p); 179 } 180 181 int 182 adosfs_mountfs(devvp, mp, p) 183 struct vnode *devvp; 184 struct mount *mp; 185 struct proc *p; 186 { 187 struct disklabel dl; 188 struct partition *parp; 189 struct adosfsmount *amp; 190 struct buf *bp; 191 struct vnode *rvp; 192 int error, part, i; 193 194 part = DISKPART(devvp->v_rdev); 195 amp = NULL; 196 197 /* 198 * Disallow multiple mounts of the same device. 199 * Disallow mounting of a device that is currently in use 200 * (except for root, which might share swap device for miniroot). 201 * Flush out any old buffers remaining from a previous use. 202 */ 203 if ((error = vfs_mountedon(devvp)) != 0) 204 return (error); 205 if (vcount(devvp) > 1 && devvp != rootvp) 206 return (EBUSY); 207 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 208 return (error); 209 210 /* 211 * open blkdev and read root block 212 */ 213 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, p)) != 0) 214 return (error); 215 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, p); 216 if (error) 217 goto fail; 218 219 parp = &dl.d_partitions[part]; 220 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 221 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 222 amp->mp = mp; 223 if (dl.d_type == DTYPE_FLOPPY) { 224 amp->bsize = dl.d_secsize; 225 amp->secsperblk = 1; 226 } 227 else { 228 amp->bsize = parp->p_fsize * parp->p_frag; 229 amp->secsperblk = parp->p_frag; 230 } 231 232 /* invalid fs ? */ 233 if (amp->secsperblk == 0) { 234 error = EINVAL; 235 goto fail; 236 } 237 238 bp = NULL; 239 if ((error = bread(devvp, (daddr_t)BBOFF, 240 amp->bsize, NOCRED, &bp)) != 0) { 241 brelse(bp); 242 goto fail; 243 } 244 amp->dostype = adoswordn(bp, 0); 245 brelse(bp); 246 247 /* basic sanity checks */ 248 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 249 error = EINVAL; 250 goto fail; 251 } 252 253 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 254 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 255 256 amp->nwords = amp->bsize >> 2; 257 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 258 amp->devvp = devvp; 259 260 mp->mnt_data = amp; 261 mp->mnt_stat.f_fsid.val[0] = (long)devvp->v_rdev; 262 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_ADOSFS); 263 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 264 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 265 mp->mnt_flag |= MNT_LOCAL; 266 267 /* 268 * init anode table. 269 */ 270 for (i = 0; i < ANODEHASHSZ; i++) 271 LIST_INIT(&->anodetab[i]); 272 273 /* 274 * get the root anode, if not a valid fs this will fail. 275 */ 276 if ((error = VFS_ROOT(mp, &rvp)) != 0) 277 goto fail; 278 /* allocate and load bitmap, set free space */ 279 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 280 M_ADOSFSBITMAP, M_WAITOK); 281 if (amp->bitmap) 282 adosfs_loadbitmap(amp); 283 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 284 /* 285 * Don't need the bitmap any more if it's read-only. 286 */ 287 free(amp->bitmap, M_ADOSFSBITMAP); 288 amp->bitmap = NULL; 289 } 290 vput(rvp); 291 292 return(0); 293 294 fail: 295 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 296 (void) VOP_CLOSE(devvp, FREAD, NOCRED, p); 297 VOP_UNLOCK(devvp, 0); 298 if (amp && amp->bitmap) 299 free(amp->bitmap, M_ADOSFSBITMAP); 300 if (amp) 301 free(amp, M_ADOSFSMNT); 302 return (error); 303 } 304 305 int 306 adosfs_start(mp, flags, p) 307 struct mount *mp; 308 int flags; 309 struct proc *p; 310 { 311 312 return (0); 313 } 314 315 int 316 adosfs_unmount(mp, mntflags, p) 317 struct mount *mp; 318 int mntflags; 319 struct proc *p; 320 { 321 struct adosfsmount *amp; 322 int error, flags; 323 324 flags = 0; 325 if (mntflags & MNT_FORCE) 326 flags |= FORCECLOSE; 327 if ((error = vflush(mp, NULLVP, flags)) != 0) 328 return (error); 329 amp = VFSTOADOSFS(mp); 330 if (amp->devvp->v_type != VBAD) 331 amp->devvp->v_specmountpoint = NULL; 332 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 333 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, p); 334 vput(amp->devvp); 335 if (amp->bitmap) 336 free(amp->bitmap, M_ADOSFSBITMAP); 337 free(amp, M_ADOSFSMNT); 338 mp->mnt_data = NULL; 339 mp->mnt_flag &= ~MNT_LOCAL; 340 return (error); 341 } 342 343 int 344 adosfs_root(mp, vpp) 345 struct mount *mp; 346 struct vnode **vpp; 347 { 348 struct vnode *nvp; 349 int error; 350 351 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 352 return (error); 353 /* XXX verify it's a root block? */ 354 *vpp = nvp; 355 return (0); 356 } 357 358 int 359 adosfs_statfs(mp, sbp, p) 360 struct mount *mp; 361 struct statfs *sbp; 362 struct proc *p; 363 { 364 struct adosfsmount *amp; 365 366 amp = VFSTOADOSFS(mp); 367 #ifdef COMPAT_09 368 sbp->f_type = 16; 369 #else 370 sbp->f_type = 0; 371 #endif 372 sbp->f_bsize = amp->bsize; 373 sbp->f_iosize = amp->dbsize; 374 sbp->f_blocks = amp->numblks; 375 sbp->f_bfree = amp->freeblks; 376 sbp->f_bavail = amp->freeblks; 377 sbp->f_files = 0; /* who knows */ 378 sbp->f_ffree = 0; /* " " */ 379 copy_statfs_info(sbp, mp); 380 return (0); 381 } 382 383 /* 384 * lookup an anode, check mount's hash table if not found, create 385 * return locked and referenced al la vget(vp, 1); 386 */ 387 int 388 adosfs_vget(mp, an, vpp) 389 struct mount *mp; 390 ino_t an; 391 struct vnode **vpp; 392 { 393 struct adosfsmount *amp; 394 struct vnode *vp; 395 struct anode *ap; 396 struct buf *bp; 397 char *nam, *tmp; 398 int namlen, error; 399 400 error = 0; 401 amp = VFSTOADOSFS(mp); 402 bp = NULL; 403 404 /* 405 * check hash table. we are done if found 406 */ 407 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 408 return (0); 409 410 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 411 if (error) 412 return (error); 413 414 /* 415 * setup, insert in hash, and lock before io. 416 */ 417 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 418 memset(ap, 0, sizeof(struct anode)); 419 ap->vp = vp; 420 ap->amp = amp; 421 ap->block = an; 422 ap->nwords = amp->nwords; 423 adosfs_ainshash(amp, ap); 424 425 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 426 amp->bsize, NOCRED, &bp)) != 0) { 427 brelse(bp); 428 vput(vp); 429 return (error); 430 } 431 432 /* 433 * get type and fill rest in based on that. 434 */ 435 switch (ap->type = adosfs_getblktype(amp, bp)) { 436 case AROOT: 437 vp->v_type = VDIR; 438 vp->v_flag |= VROOT; 439 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 440 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 441 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 442 ap->created.days = adoswordn(bp, ap->nwords - 7); 443 ap->created.mins = adoswordn(bp, ap->nwords - 6); 444 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 445 break; 446 case ALDIR: 447 case ADIR: 448 vp->v_type = VDIR; 449 break; 450 case ALFILE: 451 case AFILE: 452 vp->v_type = VREG; 453 ap->fsize = adoswordn(bp, ap->nwords - 47); 454 break; 455 case ASLINK: /* XXX soft link */ 456 vp->v_type = VLNK; 457 /* 458 * convert from BCPL string and 459 * from: "part:dir/file" to: "/part/dir/file" 460 */ 461 nam = bp->b_data + (6 * sizeof(long)); 462 namlen = strlen(nam); 463 tmp = nam; 464 while (*tmp && *tmp != ':') 465 tmp++; 466 if (*tmp == 0) { 467 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 468 memcpy(ap->slinkto, nam, namlen); 469 } else if (*nam == ':') { 470 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 471 memcpy(ap->slinkto, nam, namlen); 472 ap->slinkto[0] = '/'; 473 } else { 474 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 475 ap->slinkto[0] = '/'; 476 memcpy(&ap->slinkto[1], nam, namlen); 477 ap->slinkto[tmp - nam + 1] = '/'; 478 namlen++; 479 } 480 ap->slinkto[namlen] = 0; 481 ap->fsize = namlen; 482 break; 483 default: 484 brelse(bp); 485 vput(vp); 486 return (EINVAL); 487 } 488 489 /* 490 * Get appropriate data from this block; hard link needs 491 * to get other data from the "real" block. 492 */ 493 494 /* 495 * copy in name (from original block) 496 */ 497 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 498 namlen = *(u_char *)nam++; 499 if (namlen > 30) { 500 #ifdef DIAGNOSTIC 501 printf("adosfs: aget: name length too long blk %d\n", an); 502 #endif 503 brelse(bp); 504 vput(vp); 505 return (EINVAL); 506 } 507 memcpy(ap->name, nam, namlen); 508 ap->name[namlen] = 0; 509 510 /* 511 * if dir alloc hash table and copy it in 512 */ 513 if (vp->v_type == VDIR) { 514 int i; 515 516 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 517 ap->ntabent = ANODETABENT(ap); 518 ap->tabi = (int *)&ap->tab[ap->ntabent]; 519 memset(ap->tabi, 0, ANODETABSZ(ap)); 520 for (i = 0; i < ap->ntabent; i++) 521 ap->tab[i] = adoswordn(bp, i + 6); 522 } 523 524 /* 525 * misc. 526 */ 527 ap->pblock = adoswordn(bp, ap->nwords - 3); 528 ap->hashf = adoswordn(bp, ap->nwords - 4); 529 ap->linknext = adoswordn(bp, ap->nwords - 10); 530 ap->linkto = adoswordn(bp, ap->nwords - 11); 531 532 /* 533 * setup last indirect block cache. 534 */ 535 ap->lastlindblk = 0; 536 if (ap->type == AFILE) { 537 ap->lastindblk = ap->block; 538 if (adoswordn(bp, ap->nwords - 10)) 539 ap->linkto = ap->block; 540 } else if (ap->type == ALFILE) { 541 ap->lastindblk = ap->linkto; 542 brelse(bp); 543 bp = NULL; 544 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 545 amp->bsize, NOCRED, &bp); 546 if (error) { 547 brelse(bp); 548 vput(vp); 549 return (error); 550 } 551 ap->fsize = adoswordn(bp, ap->nwords - 47); 552 /* 553 * Should ap->block be set to the real file header block? 554 */ 555 ap->block = ap->linkto; 556 } 557 558 if (ap->type == AROOT) { 559 ap->adprot = 15; 560 ap->uid = amp->uid; 561 ap->gid = amp->gid; 562 } else { 563 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 564 /* 565 * ADOS directories do not have a `x' protection bit as 566 * it is known in VFS; this functionality is fulfilled 567 * by the ADOS `r' bit. 568 * 569 * To retain the ADOS behaviour, fake execute permissions 570 * in that case. 571 */ 572 if ((ap->type == ADIR || ap->type == ALDIR) && 573 (ap->adprot & 0x00000008) == 0) 574 ap->adprot &= ~0x00000002; 575 576 /* 577 * Get uid/gid from extensions in file header 578 * (really need to know if this is a muFS partition) 579 */ 580 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 581 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 582 if (ap->uid || ap->gid) { 583 if (ap->uid == 0xffff) 584 ap->uid = 0; 585 if (ap->gid == 0xffff) 586 ap->gid = 0; 587 ap->adprot |= 0x40000000; /* Kludge */ 588 } 589 else { 590 /* 591 * uid & gid extension don't exist, 592 * so use the mount-point uid/gid 593 */ 594 ap->uid = amp->uid; 595 ap->gid = amp->gid; 596 } 597 } 598 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 599 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 600 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 601 602 genfs_node_init(vp, &adosfs_genfsops); 603 *vpp = vp; 604 brelse(bp); 605 vp->v_size = ap->fsize; 606 return (0); 607 } 608 609 /* 610 * Load the bitmap into memory, and count the number of available 611 * blocks. 612 * The bitmap will be released if the filesystem is read-only; it's 613 * only needed to find the free space. 614 */ 615 int 616 adosfs_loadbitmap(amp) 617 struct adosfsmount *amp; 618 { 619 struct buf *bp, *mapbp; 620 u_long bn; 621 int blkix, endix, mapix; 622 int bmsize; 623 int error; 624 625 bp = mapbp = NULL; 626 bn = amp->rootb; 627 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 628 NOCRED, &bp)) != 0) { 629 brelse(bp); 630 return (error); 631 } 632 blkix = amp->nwords - 49; 633 endix = amp->nwords - 24; 634 mapix = 0; 635 bmsize = (amp->numblks + 31) / 32; 636 while (mapix < bmsize) { 637 int n; 638 u_long bits; 639 640 if (adoswordn(bp, blkix) == 0) 641 break; 642 if (mapbp != NULL) 643 brelse(mapbp); 644 if ((error = bread(amp->devvp, 645 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 646 NOCRED, &mapbp)) != 0) 647 break; 648 if (adoscksum(mapbp, amp->nwords)) { 649 #ifdef DIAGNOSTIC 650 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 651 adoswordn(bp, blkix)); 652 #endif 653 /* XXX Force read-only? Set free space 0? */ 654 break; 655 } 656 n = 1; 657 while (n < amp->nwords && mapix < bmsize) { 658 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 659 ++n; 660 if (mapix == bmsize && amp->numblks & 31) 661 bits &= ~(0xffffffff << (amp->numblks & 31)); 662 while (bits) { 663 if (bits & 1) 664 ++amp->freeblks; 665 bits >>= 1; 666 } 667 } 668 ++blkix; 669 if (mapix < bmsize && blkix == endix) { 670 bn = adoswordn(bp, blkix); 671 brelse(bp); 672 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 673 amp->bsize, NOCRED, &bp)) != 0) 674 break; 675 /* 676 * Why is there no checksum on these blocks? 677 */ 678 blkix = 0; 679 endix = amp->nwords - 1; 680 } 681 } 682 if (bp) 683 brelse(bp); 684 if (mapbp) 685 brelse(mapbp); 686 return (error); 687 } 688 689 690 /* 691 * File handle to vnode 692 * 693 * Have to be really careful about stale file handles: 694 * - check that the inode number is in range 695 * - call iget() to get the locked inode 696 * - check for an unallocated inode (i_mode == 0) 697 * - check that the generation number matches 698 */ 699 700 struct ifid { 701 ushort ifid_len; 702 ushort ifid_pad; 703 int ifid_ino; 704 long ifid_start; 705 }; 706 707 int 708 adosfs_fhtovp(mp, fhp, vpp) 709 struct mount *mp; 710 struct fid *fhp; 711 struct vnode **vpp; 712 { 713 struct ifid *ifhp = (struct ifid *)fhp; 714 #if 0 715 struct anode *ap; 716 #endif 717 struct vnode *nvp; 718 int error; 719 720 #ifdef ADOSFS_DIAGNOSTIC 721 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 722 #endif 723 724 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 725 *vpp = NULLVP; 726 return (error); 727 } 728 #if 0 729 ap = VTOA(nvp); 730 if (ap->inode.iso_mode == 0) { 731 vput(nvp); 732 *vpp = NULLVP; 733 return (ESTALE); 734 } 735 #endif 736 *vpp = nvp; 737 return(0); 738 } 739 740 int 741 adosfs_checkexp(mp, nam, exflagsp, credanonp) 742 struct mount *mp; 743 struct mbuf *nam; 744 int *exflagsp; 745 struct ucred **credanonp; 746 { 747 struct adosfsmount *amp = VFSTOADOSFS(mp); 748 #if 0 749 struct anode *ap; 750 #endif 751 struct netcred *np; 752 753 #ifdef ADOSFS_DIAGNOSTIC 754 printf("adcheckexp(%x, %x, %x)\n", mp, nam, exflagsp); 755 #endif 756 757 /* 758 * Get the export permission structure for this <mp, client> tuple. 759 */ 760 np = vfs_export_lookup(mp, &->export, nam); 761 if (np == NULL) 762 return (EACCES); 763 764 *exflagsp = np->netc_exflags; 765 *credanonp = &np->netc_anon; 766 return(0); 767 } 768 769 int 770 adosfs_vptofh(vp, fhp) 771 struct vnode *vp; 772 struct fid *fhp; 773 { 774 struct anode *ap = VTOA(vp); 775 struct ifid *ifhp; 776 777 ifhp = (struct ifid *)fhp; 778 ifhp->ifid_len = sizeof(struct ifid); 779 780 ifhp->ifid_ino = ap->block; 781 ifhp->ifid_start = ap->block; 782 783 #ifdef ADOSFS_DIAGNOSTIC 784 printf("advptofh(%x, %x)\n", vp, fhp); 785 #endif 786 return(0); 787 } 788 789 int 790 adosfs_quotactl(mp, cmds, uid, arg, p) 791 struct mount *mp; 792 int cmds; 793 uid_t uid; 794 caddr_t arg; 795 struct proc *p; 796 { 797 return(EOPNOTSUPP); 798 } 799 800 int 801 adosfs_sync(mp, waitfor, uc, p) 802 struct mount *mp; 803 int waitfor; 804 struct ucred *uc; 805 struct proc *p; 806 { 807 #ifdef ADOSFS_DIAGNOSTIC 808 printf("ad_sync(%x, %x)\n", mp, waitfor); 809 #endif 810 return(0); 811 } 812 813 void 814 adosfs_init() 815 { 816 simple_lock_init(&adosfs_hashlock); 817 818 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, 819 "adosndpl", &pool_allocator_nointr); 820 } 821 822 void 823 adosfs_done() 824 { 825 pool_destroy(&adosfs_node_pool); 826 } 827 828 int 829 adosfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 830 int *name; 831 u_int namelen; 832 void *oldp; 833 size_t *oldlenp; 834 void *newp; 835 size_t newlen; 836 struct proc *p; 837 { 838 return (EOPNOTSUPP); 839 } 840 841 /* 842 * vfs generic function call table 843 */ 844 845 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 846 847 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 848 &adosfs_vnodeop_opv_desc, 849 NULL, 850 }; 851 852 struct vfsops adosfs_vfsops = { 853 MOUNT_ADOSFS, 854 adosfs_mount, 855 adosfs_start, 856 adosfs_unmount, 857 adosfs_root, 858 adosfs_quotactl, 859 adosfs_statfs, 860 adosfs_sync, 861 adosfs_vget, 862 adosfs_fhtovp, 863 adosfs_vptofh, 864 adosfs_init, 865 NULL, 866 adosfs_done, 867 adosfs_sysctl, 868 NULL, /* vfs_mountroot */ 869 adosfs_checkexp, 870 adosfs_vnodeopv_descs, 871 }; 872
Indexes created Wed Sep 24 05:09:52 GMT 2025