advfsops.c revision 1.32
1 /* $NetBSD: advfsops.c,v 1.32 2007/01/04 15:42:37 elad 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 1.32 2007/01/04 15:42:37 elad 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/sysctl.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/proc.h> 47 #include <sys/time.h> 48 #include <sys/malloc.h> 49 #include <sys/pool.h> 50 #include <sys/disklabel.h> 51 #include <miscfs/specfs/specdev.h> /* XXX */ 52 #include <sys/fcntl.h> 53 #include <sys/namei.h> 54 #include <sys/ioctl.h> 55 #include <sys/queue.h> 56 #include <sys/buf.h> 57 #include <sys/conf.h> 58 #include <sys/kauth.h> 59 #include <fs/adosfs/adosfs.h> 60 61 void adosfs_init __P((void)); 62 void adosfs_reinit __P((void)); 63 void adosfs_done __P((void)); 64 int adosfs_mount __P((struct mount *, const char *, void *, struct nameidata *, 65 struct lwp *)); 66 int adosfs_start __P((struct mount *, int, struct lwp *)); 67 int adosfs_unmount __P((struct mount *, int, struct lwp *)); 68 int adosfs_root __P((struct mount *, struct vnode **)); 69 int adosfs_quotactl __P((struct mount *, int, uid_t, void *, struct lwp *)); 70 int adosfs_statvfs __P((struct mount *, struct statvfs *, struct lwp *)); 71 int adosfs_sync __P((struct mount *, int, kauth_cred_t, struct lwp *)); 72 int adosfs_vget __P((struct mount *, ino_t, struct vnode **)); 73 int adosfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 74 int adosfs_vptofh __P((struct vnode *, struct fid *, size_t *)); 75 76 int adosfs_mountfs __P((struct vnode *, struct mount *, struct lwp *)); 77 int adosfs_loadbitmap __P((struct adosfsmount *)); 78 79 struct simplelock adosfs_hashlock; 80 81 POOL_INIT(adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 82 &pool_allocator_nointr); 83 84 MALLOC_DEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 85 MALLOC_DEFINE(M_ANODE, "adosfs anode", "adosfs anode structures and tables"); 86 MALLOC_DEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 87 88 static const struct genfs_ops adosfs_genfsops = { 89 .gop_size = genfs_size, 90 }; 91 92 int (**adosfs_vnodeop_p) __P((void *)); 93 94 int 95 adosfs_mount(mp, path, data, ndp, l) 96 struct mount *mp; 97 const char *path; 98 void *data; 99 struct nameidata *ndp; 100 struct lwp *l; 101 { 102 struct vnode *devvp; 103 struct adosfs_args args; 104 struct adosfsmount *amp; 105 int error; 106 mode_t accessmode; 107 108 if (mp->mnt_flag & MNT_GETARGS) { 109 amp = VFSTOADOSFS(mp); 110 if (amp == NULL) 111 return EIO; 112 args.uid = amp->uid; 113 args.gid = amp->gid; 114 args.mask = amp->mask; 115 args.fspec = NULL; 116 return copyout(&args, data, sizeof(args)); 117 } 118 error = copyin(data, &args, sizeof(struct adosfs_args)); 119 if (error) 120 return(error); 121 122 if ((mp->mnt_flag & MNT_RDONLY) == 0) 123 return (EROFS); 124 125 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 126 return EOPNOTSUPP; 127 128 /* 129 * Not an update, or updating the name: look up the name 130 * and verify that it refers to a sensible block device. 131 */ 132 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 133 if ((error = namei(ndp)) != 0) 134 return (error); 135 devvp = ndp->ni_vp; 136 137 if (devvp->v_type != VBLK) { 138 vrele(devvp); 139 return (ENOTBLK); 140 } 141 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 142 vrele(devvp); 143 return (ENXIO); 144 } 145 /* 146 * If mount by non-root, then verify that user has necessary 147 * permissions on the device. 148 */ 149 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 150 accessmode = VREAD; 151 if ((mp->mnt_flag & MNT_RDONLY) == 0) 152 accessmode |= VWRITE; 153 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 154 error = VOP_ACCESS(devvp, accessmode, l->l_cred, l); 155 if (error) { 156 vput(devvp); 157 return (error); 158 } 159 VOP_UNLOCK(devvp, 0); 160 } 161 /* MNT_UPDATE? */ 162 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 163 vrele(devvp); 164 return (error); 165 } 166 amp = VFSTOADOSFS(mp); 167 amp->uid = args.uid; 168 amp->gid = args.gid; 169 amp->mask = args.mask; 170 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 171 mp, l); 172 } 173 174 int 175 adosfs_mountfs(devvp, mp, l) 176 struct vnode *devvp; 177 struct mount *mp; 178 struct lwp *l; 179 { 180 struct disklabel dl; 181 struct partition *parp; 182 struct adosfsmount *amp; 183 struct buf *bp; 184 struct vnode *rvp; 185 int error, part, i; 186 187 part = DISKPART(devvp->v_rdev); 188 amp = NULL; 189 190 /* 191 * Disallow multiple mounts of the same device. 192 * Disallow mounting of a device that is currently in use 193 * (except for root, which might share swap device for miniroot). 194 * Flush out any old buffers remaining from a previous use. 195 */ 196 if ((error = vfs_mountedon(devvp)) != 0) 197 return (error); 198 if (vcount(devvp) > 1 && devvp != rootvp) 199 return (EBUSY); 200 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 201 != 0) 202 return (error); 203 204 /* 205 * open blkdev and read root block 206 */ 207 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, l)) != 0) 208 return (error); 209 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, l); 210 if (error) 211 goto fail; 212 213 parp = &dl.d_partitions[part]; 214 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 215 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 216 amp->mp = mp; 217 if (dl.d_type == DTYPE_FLOPPY) { 218 amp->bsize = dl.d_secsize; 219 amp->secsperblk = 1; 220 } 221 else { 222 amp->bsize = parp->p_fsize * parp->p_frag; 223 amp->secsperblk = parp->p_frag; 224 } 225 226 /* invalid fs ? */ 227 if (amp->secsperblk == 0) { 228 error = EINVAL; 229 goto fail; 230 } 231 232 bp = NULL; 233 if ((error = bread(devvp, (daddr_t)BBOFF, 234 amp->bsize, NOCRED, &bp)) != 0) { 235 brelse(bp); 236 goto fail; 237 } 238 amp->dostype = adoswordn(bp, 0); 239 brelse(bp); 240 241 /* basic sanity checks */ 242 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 243 error = EINVAL; 244 goto fail; 245 } 246 247 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 248 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 249 250 amp->nwords = amp->bsize >> 2; 251 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 252 amp->devvp = devvp; 253 254 mp->mnt_data = amp; 255 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 256 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 257 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 258 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 259 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 260 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 261 mp->mnt_flag |= MNT_LOCAL; 262 263 /* 264 * init anode table. 265 */ 266 for (i = 0; i < ANODEHASHSZ; i++) 267 LIST_INIT(&->anodetab[i]); 268 269 /* 270 * get the root anode, if not a valid fs this will fail. 271 */ 272 if ((error = VFS_ROOT(mp, &rvp)) != 0) 273 goto fail; 274 /* allocate and load bitmap, set free space */ 275 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 276 M_ADOSFSBITMAP, M_WAITOK); 277 if (amp->bitmap) 278 adosfs_loadbitmap(amp); 279 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 280 /* 281 * Don't need the bitmap any more if it's read-only. 282 */ 283 free(amp->bitmap, M_ADOSFSBITMAP); 284 amp->bitmap = NULL; 285 } 286 vput(rvp); 287 288 return(0); 289 290 fail: 291 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 292 (void) VOP_CLOSE(devvp, FREAD, NOCRED, l); 293 VOP_UNLOCK(devvp, 0); 294 if (amp && amp->bitmap) 295 free(amp->bitmap, M_ADOSFSBITMAP); 296 if (amp) 297 free(amp, M_ADOSFSMNT); 298 return (error); 299 } 300 301 int 302 adosfs_start(mp, flags, l) 303 struct mount *mp; 304 int flags; 305 struct lwp *l; 306 { 307 308 return (0); 309 } 310 311 int 312 adosfs_unmount(mp, mntflags, l) 313 struct mount *mp; 314 int mntflags; 315 struct lwp *l; 316 { 317 struct adosfsmount *amp; 318 int error, flags; 319 320 flags = 0; 321 if (mntflags & MNT_FORCE) 322 flags |= FORCECLOSE; 323 if ((error = vflush(mp, NULLVP, flags)) != 0) 324 return (error); 325 amp = VFSTOADOSFS(mp); 326 if (amp->devvp->v_type != VBAD) 327 amp->devvp->v_specmountpoint = NULL; 328 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 329 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, l); 330 vput(amp->devvp); 331 if (amp->bitmap) 332 free(amp->bitmap, M_ADOSFSBITMAP); 333 free(amp, M_ADOSFSMNT); 334 mp->mnt_data = NULL; 335 mp->mnt_flag &= ~MNT_LOCAL; 336 return (error); 337 } 338 339 int 340 adosfs_root(mp, vpp) 341 struct mount *mp; 342 struct vnode **vpp; 343 { 344 struct vnode *nvp; 345 int error; 346 347 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 348 return (error); 349 /* XXX verify it's a root block? */ 350 *vpp = nvp; 351 return (0); 352 } 353 354 int 355 adosfs_statvfs(mp, sbp, l) 356 struct mount *mp; 357 struct statvfs *sbp; 358 struct lwp *l; 359 { 360 struct adosfsmount *amp; 361 362 amp = VFSTOADOSFS(mp); 363 sbp->f_bsize = amp->bsize; 364 sbp->f_frsize = amp->bsize; 365 sbp->f_iosize = amp->dbsize; 366 sbp->f_blocks = amp->numblks; 367 sbp->f_bfree = amp->freeblks; 368 sbp->f_bavail = amp->freeblks; 369 sbp->f_bresvd = 0; 370 sbp->f_files = 0; /* who knows */ 371 sbp->f_ffree = 0; /* " " */ 372 sbp->f_favail = 0; /* " " */ 373 sbp->f_fresvd = 0; 374 copy_statvfs_info(sbp, mp); 375 return (0); 376 } 377 378 /* 379 * lookup an anode, check mount's hash table if not found, create 380 * return locked and referenced al la vget(vp, 1); 381 */ 382 int 383 adosfs_vget(mp, an, vpp) 384 struct mount *mp; 385 ino_t an; 386 struct vnode **vpp; 387 { 388 struct adosfsmount *amp; 389 struct vnode *vp; 390 struct anode *ap; 391 struct buf *bp; 392 char *nam, *tmp; 393 int namlen, error; 394 395 error = 0; 396 amp = VFSTOADOSFS(mp); 397 bp = NULL; 398 399 /* 400 * check hash table. we are done if found 401 */ 402 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 403 return (0); 404 405 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 406 if (error) 407 return (error); 408 409 /* 410 * setup, insert in hash, and lock before io. 411 */ 412 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 413 memset(ap, 0, sizeof(struct anode)); 414 ap->vp = vp; 415 ap->amp = amp; 416 ap->block = an; 417 ap->nwords = amp->nwords; 418 adosfs_ainshash(amp, ap); 419 420 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 421 amp->bsize, NOCRED, &bp)) != 0) { 422 brelse(bp); 423 vput(vp); 424 return (error); 425 } 426 427 /* 428 * get type and fill rest in based on that. 429 */ 430 switch (ap->type = adosfs_getblktype(amp, bp)) { 431 case AROOT: 432 vp->v_type = VDIR; 433 vp->v_flag |= VROOT; 434 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 435 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 436 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 437 ap->created.days = adoswordn(bp, ap->nwords - 7); 438 ap->created.mins = adoswordn(bp, ap->nwords - 6); 439 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 440 break; 441 case ALDIR: 442 case ADIR: 443 vp->v_type = VDIR; 444 break; 445 case ALFILE: 446 case AFILE: 447 vp->v_type = VREG; 448 ap->fsize = adoswordn(bp, ap->nwords - 47); 449 break; 450 case ASLINK: /* XXX soft link */ 451 vp->v_type = VLNK; 452 /* 453 * convert from BCPL string and 454 * from: "part:dir/file" to: "/part/dir/file" 455 */ 456 nam = bp->b_data + (6 * sizeof(long)); 457 namlen = strlen(nam); 458 tmp = nam; 459 while (*tmp && *tmp != ':') 460 tmp++; 461 if (*tmp == 0) { 462 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 463 memcpy(ap->slinkto, nam, namlen); 464 } else if (*nam == ':') { 465 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 466 memcpy(ap->slinkto, nam, namlen); 467 ap->slinkto[0] = '/'; 468 } else { 469 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 470 ap->slinkto[0] = '/'; 471 memcpy(&ap->slinkto[1], nam, namlen); 472 ap->slinkto[tmp - nam + 1] = '/'; 473 namlen++; 474 } 475 ap->slinkto[namlen] = 0; 476 ap->fsize = namlen; 477 break; 478 default: 479 brelse(bp); 480 vput(vp); 481 return (EINVAL); 482 } 483 484 /* 485 * Get appropriate data from this block; hard link needs 486 * to get other data from the "real" block. 487 */ 488 489 /* 490 * copy in name (from original block) 491 */ 492 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 493 namlen = *(u_char *)nam++; 494 if (namlen > 30) { 495 #ifdef DIAGNOSTIC 496 printf("adosfs: aget: name length too long blk %llu\n", 497 (unsigned long long)an); 498 #endif 499 brelse(bp); 500 vput(vp); 501 return (EINVAL); 502 } 503 memcpy(ap->name, nam, namlen); 504 ap->name[namlen] = 0; 505 506 /* 507 * if dir alloc hash table and copy it in 508 */ 509 if (vp->v_type == VDIR) { 510 int i; 511 512 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 513 ap->ntabent = ANODETABENT(ap); 514 ap->tabi = (int *)&ap->tab[ap->ntabent]; 515 memset(ap->tabi, 0, ANODETABSZ(ap)); 516 for (i = 0; i < ap->ntabent; i++) 517 ap->tab[i] = adoswordn(bp, i + 6); 518 } 519 520 /* 521 * misc. 522 */ 523 ap->pblock = adoswordn(bp, ap->nwords - 3); 524 ap->hashf = adoswordn(bp, ap->nwords - 4); 525 ap->linknext = adoswordn(bp, ap->nwords - 10); 526 ap->linkto = adoswordn(bp, ap->nwords - 11); 527 528 /* 529 * setup last indirect block cache. 530 */ 531 ap->lastlindblk = 0; 532 if (ap->type == AFILE) { 533 ap->lastindblk = ap->block; 534 if (adoswordn(bp, ap->nwords - 10)) 535 ap->linkto = ap->block; 536 } else if (ap->type == ALFILE) { 537 ap->lastindblk = ap->linkto; 538 brelse(bp); 539 bp = NULL; 540 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 541 amp->bsize, NOCRED, &bp); 542 if (error) { 543 brelse(bp); 544 vput(vp); 545 return (error); 546 } 547 ap->fsize = adoswordn(bp, ap->nwords - 47); 548 /* 549 * Should ap->block be set to the real file header block? 550 */ 551 ap->block = ap->linkto; 552 } 553 554 if (ap->type == AROOT) { 555 ap->adprot = 15; 556 ap->uid = amp->uid; 557 ap->gid = amp->gid; 558 } else { 559 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 560 /* 561 * ADOS directories do not have a `x' protection bit as 562 * it is known in VFS; this functionality is fulfilled 563 * by the ADOS `r' bit. 564 * 565 * To retain the ADOS behaviour, fake execute permissions 566 * in that case. 567 */ 568 if ((ap->type == ADIR || ap->type == ALDIR) && 569 (ap->adprot & 0x00000008) == 0) 570 ap->adprot &= ~0x00000002; 571 572 /* 573 * Get uid/gid from extensions in file header 574 * (really need to know if this is a muFS partition) 575 */ 576 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 577 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 578 if (ap->uid || ap->gid) { 579 if (ap->uid == 0xffff) 580 ap->uid = 0; 581 if (ap->gid == 0xffff) 582 ap->gid = 0; 583 ap->adprot |= 0x40000000; /* Kludge */ 584 } 585 else { 586 /* 587 * uid & gid extension don't exist, 588 * so use the mount-point uid/gid 589 */ 590 ap->uid = amp->uid; 591 ap->gid = amp->gid; 592 } 593 } 594 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 595 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 596 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 597 598 genfs_node_init(vp, &adosfs_genfsops); 599 *vpp = vp; 600 brelse(bp); 601 vp->v_size = ap->fsize; 602 return (0); 603 } 604 605 /* 606 * Load the bitmap into memory, and count the number of available 607 * blocks. 608 * The bitmap will be released if the filesystem is read-only; it's 609 * only needed to find the free space. 610 */ 611 int 612 adosfs_loadbitmap(amp) 613 struct adosfsmount *amp; 614 { 615 struct buf *bp, *mapbp; 616 u_long bn; 617 int blkix, endix, mapix; 618 int bmsize; 619 int error; 620 621 bp = mapbp = NULL; 622 bn = amp->rootb; 623 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 624 NOCRED, &bp)) != 0) { 625 brelse(bp); 626 return (error); 627 } 628 blkix = amp->nwords - 49; 629 endix = amp->nwords - 24; 630 mapix = 0; 631 bmsize = (amp->numblks + 31) / 32; 632 while (mapix < bmsize) { 633 int n; 634 u_long bits; 635 636 if (adoswordn(bp, blkix) == 0) 637 break; 638 if (mapbp != NULL) 639 brelse(mapbp); 640 if ((error = bread(amp->devvp, 641 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 642 NOCRED, &mapbp)) != 0) 643 break; 644 if (adoscksum(mapbp, amp->nwords)) { 645 #ifdef DIAGNOSTIC 646 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 647 adoswordn(bp, blkix)); 648 #endif 649 /* XXX Force read-only? Set free space 0? */ 650 break; 651 } 652 n = 1; 653 while (n < amp->nwords && mapix < bmsize) { 654 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 655 ++n; 656 if (mapix == bmsize && amp->numblks & 31) 657 bits &= ~(0xffffffff << (amp->numblks & 31)); 658 while (bits) { 659 if (bits & 1) 660 ++amp->freeblks; 661 bits >>= 1; 662 } 663 } 664 ++blkix; 665 if (mapix < bmsize && blkix == endix) { 666 bn = adoswordn(bp, blkix); 667 brelse(bp); 668 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 669 amp->bsize, NOCRED, &bp)) != 0) 670 break; 671 /* 672 * Why is there no checksum on these blocks? 673 */ 674 blkix = 0; 675 endix = amp->nwords - 1; 676 } 677 } 678 if (bp) 679 brelse(bp); 680 if (mapbp) 681 brelse(mapbp); 682 return (error); 683 } 684 685 686 /* 687 * File handle to vnode 688 * 689 * Have to be really careful about stale file handles: 690 * - check that the inode number is in range 691 * - call iget() to get the locked inode 692 * - check for an unallocated inode (i_mode == 0) 693 * - check that the generation number matches 694 */ 695 696 struct ifid { 697 ushort ifid_len; 698 ushort ifid_pad; 699 int ifid_ino; 700 long ifid_start; 701 }; 702 703 int 704 adosfs_fhtovp(mp, fhp, vpp) 705 struct mount *mp; 706 struct fid *fhp; 707 struct vnode **vpp; 708 { 709 struct ifid ifh; 710 #if 0 711 struct anode *ap; 712 #endif 713 struct vnode *nvp; 714 int error; 715 716 if (fhp->fid_len != sizeof(struct ifid)) 717 return EINVAL; 718 719 #ifdef ADOSFS_DIAGNOSTIC 720 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 721 #endif 722 723 memcpy(&ifh, fhp, sizeof(ifh)); 724 725 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 726 *vpp = NULLVP; 727 return (error); 728 } 729 #if 0 730 ap = VTOA(nvp); 731 if (ap->inode.iso_mode == 0) { 732 vput(nvp); 733 *vpp = NULLVP; 734 return (ESTALE); 735 } 736 #endif 737 *vpp = nvp; 738 return(0); 739 } 740 741 int 742 adosfs_vptofh(vp, fhp, fh_size) 743 struct vnode *vp; 744 struct fid *fhp; 745 size_t *fh_size; 746 { 747 struct anode *ap = VTOA(vp); 748 struct ifid ifh; 749 750 if (*fh_size < sizeof(struct ifid)) { 751 *fh_size = sizeof(struct ifid); 752 return E2BIG; 753 } 754 *fh_size = sizeof(struct ifid); 755 756 memset(&ifh, 0, sizeof(ifh)); 757 ifh.ifid_len = sizeof(struct ifid); 758 ifh.ifid_ino = ap->block; 759 ifh.ifid_start = ap->block; 760 memcpy(fhp, &ifh, sizeof(ifh)); 761 762 #ifdef ADOSFS_DIAGNOSTIC 763 printf("advptofh(%x, %x)\n", vp, fhp); 764 #endif 765 return(0); 766 } 767 768 int 769 adosfs_quotactl(mp, cmds, uid, arg, l) 770 struct mount *mp; 771 int cmds; 772 uid_t uid; 773 void *arg; 774 struct lwp *l; 775 { 776 return(EOPNOTSUPP); 777 } 778 779 int 780 adosfs_sync(mp, waitfor, uc, l) 781 struct mount *mp; 782 int waitfor; 783 kauth_cred_t uc; 784 struct lwp *l; 785 { 786 #ifdef ADOSFS_DIAGNOSTIC 787 printf("ad_sync(%x, %x)\n", mp, waitfor); 788 #endif 789 return(0); 790 } 791 792 void 793 adosfs_init() 794 { 795 #ifdef _LKM 796 malloc_type_attach(M_ADOSFSMNT); 797 malloc_type_attach(M_ANODE); 798 malloc_type_attach(M_ADOSFSBITMAP); 799 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 800 &pool_allocator_nointr); 801 #endif 802 simple_lock_init(&adosfs_hashlock); 803 } 804 805 void 806 adosfs_done() 807 { 808 #ifdef _LKM 809 pool_destroy(&adosfs_node_pool); 810 malloc_type_detach(M_ADOSFSBITMAP); 811 malloc_type_detach(M_ANODE); 812 malloc_type_detach(M_ADOSFSMNT); 813 #endif 814 } 815 816 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 817 { 818 819 sysctl_createv(clog, 0, NULL, NULL, 820 CTLFLAG_PERMANENT, 821 CTLTYPE_NODE, "vfs", NULL, 822 NULL, 0, NULL, 0, 823 CTL_VFS, CTL_EOL); 824 sysctl_createv(clog, 0, NULL, NULL, 825 CTLFLAG_PERMANENT, 826 CTLTYPE_NODE, "adosfs", 827 SYSCTL_DESCR("AmigaDOS file system"), 828 NULL, 0, NULL, 0, 829 CTL_VFS, 16, CTL_EOL); 830 /* 831 * XXX the "16" above could be dynamic, thereby eliminating 832 * one more instance of the "number to vfs" mapping problem, 833 * but "16" is the order as taken from sys/mount.h 834 */ 835 } 836 837 /* 838 * vfs generic function call table 839 */ 840 841 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 842 843 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 844 &adosfs_vnodeop_opv_desc, 845 NULL, 846 }; 847 848 struct vfsops adosfs_vfsops = { 849 MOUNT_ADOSFS, 850 adosfs_mount, 851 adosfs_start, 852 adosfs_unmount, 853 adosfs_root, 854 adosfs_quotactl, 855 adosfs_statvfs, 856 adosfs_sync, 857 adosfs_vget, 858 adosfs_fhtovp, 859 adosfs_vptofh, 860 adosfs_init, 861 NULL, 862 adosfs_done, 863 NULL, /* vfs_mountroot */ 864 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 865 vfs_stdextattrctl, 866 adosfs_vnodeopv_descs, 867 0, 868 { NULL, NULL }, 869 }; 870 VFS_ATTACH(adosfs_vfsops); 871
Indexes created Tue Sep 23 22:09:46 GMT 2025