advfsops.c revision 1.26
1 /* $NetBSD: advfsops.c,v 1.26 2005/12/11 12:24:25 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 1.26 2005/12/11 12:24:25 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/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 <fs/adosfs/adosfs.h> 59 60 void adosfs_init __P((void)); 61 void adosfs_reinit __P((void)); 62 void adosfs_done __P((void)); 63 int adosfs_mount __P((struct mount *, const char *, void *, struct nameidata *, 64 struct lwp *)); 65 int adosfs_start __P((struct mount *, int, struct lwp *)); 66 int adosfs_unmount __P((struct mount *, int, struct lwp *)); 67 int adosfs_root __P((struct mount *, struct vnode **)); 68 int adosfs_quotactl __P((struct mount *, int, uid_t, void *, struct lwp *)); 69 int adosfs_statvfs __P((struct mount *, struct statvfs *, struct lwp *)); 70 int adosfs_sync __P((struct mount *, int, struct ucred *, struct lwp *)); 71 int adosfs_vget __P((struct mount *, ino_t, struct vnode **)); 72 int adosfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 73 int adosfs_vptofh __P((struct vnode *, struct fid *)); 74 75 int adosfs_mountfs __P((struct vnode *, struct mount *, struct lwp *)); 76 int adosfs_loadbitmap __P((struct adosfsmount *)); 77 78 struct simplelock adosfs_hashlock; 79 80 POOL_INIT(adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 81 &pool_allocator_nointr); 82 83 MALLOC_DEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 84 MALLOC_DEFINE(M_ANODE, "adosfs anode", "adosfs anode structures and tables"); 85 MALLOC_DEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 86 87 static const struct genfs_ops adosfs_genfsops = { 88 .gop_size = genfs_size, 89 }; 90 91 int (**adosfs_vnodeop_p) __P((void *)); 92 93 int 94 adosfs_mount(mp, path, data, ndp, l) 95 struct mount *mp; 96 const char *path; 97 void *data; 98 struct nameidata *ndp; 99 struct lwp *l; 100 { 101 struct vnode *devvp; 102 struct adosfs_args args; 103 struct adosfsmount *amp; 104 struct proc *p; 105 int error; 106 mode_t accessmode; 107 108 p = l->l_proc; 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 return copyout(&args, data, sizeof(args)); 118 } 119 error = copyin(data, &args, sizeof(struct adosfs_args)); 120 if (error) 121 return(error); 122 123 if ((mp->mnt_flag & MNT_RDONLY) == 0) 124 return (EROFS); 125 126 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 127 return EOPNOTSUPP; 128 129 /* 130 * Not an update, or updating the name: look up the name 131 * and verify that it refers to a sensible block device. 132 */ 133 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 134 if ((error = namei(ndp)) != 0) 135 return (error); 136 devvp = ndp->ni_vp; 137 138 if (devvp->v_type != VBLK) { 139 vrele(devvp); 140 return (ENOTBLK); 141 } 142 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 143 vrele(devvp); 144 return (ENXIO); 145 } 146 /* 147 * If mount by non-root, then verify that user has necessary 148 * permissions on the device. 149 */ 150 if (p->p_ucred->cr_uid != 0) { 151 accessmode = VREAD; 152 if ((mp->mnt_flag & MNT_RDONLY) == 0) 153 accessmode |= VWRITE; 154 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 155 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, l); 156 if (error) { 157 vput(devvp); 158 return (error); 159 } 160 VOP_UNLOCK(devvp, 0); 161 } 162 /* MNT_UPDATE? */ 163 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 164 vrele(devvp); 165 return (error); 166 } 167 amp = VFSTOADOSFS(mp); 168 amp->uid = args.uid; 169 amp->gid = args.gid; 170 amp->mask = args.mask; 171 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 172 mp, l); 173 } 174 175 int 176 adosfs_mountfs(devvp, mp, l) 177 struct vnode *devvp; 178 struct mount *mp; 179 struct lwp *l; 180 { 181 struct disklabel dl; 182 struct partition *parp; 183 struct adosfsmount *amp; 184 struct buf *bp; 185 struct vnode *rvp; 186 int error, part, i; 187 188 part = DISKPART(devvp->v_rdev); 189 amp = NULL; 190 191 /* 192 * Disallow multiple mounts of the same device. 193 * Disallow mounting of a device that is currently in use 194 * (except for root, which might share swap device for miniroot). 195 * Flush out any old buffers remaining from a previous use. 196 */ 197 if ((error = vfs_mountedon(devvp)) != 0) 198 return (error); 199 if (vcount(devvp) > 1 && devvp != rootvp) 200 return (EBUSY); 201 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_ucred, l, 0, 0)) 202 != 0) 203 return (error); 204 205 /* 206 * open blkdev and read root block 207 */ 208 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, l)) != 0) 209 return (error); 210 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, l); 211 if (error) 212 goto fail; 213 214 parp = &dl.d_partitions[part]; 215 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 216 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 217 amp->mp = mp; 218 if (dl.d_type == DTYPE_FLOPPY) { 219 amp->bsize = dl.d_secsize; 220 amp->secsperblk = 1; 221 } 222 else { 223 amp->bsize = parp->p_fsize * parp->p_frag; 224 amp->secsperblk = parp->p_frag; 225 } 226 227 /* invalid fs ? */ 228 if (amp->secsperblk == 0) { 229 error = EINVAL; 230 goto fail; 231 } 232 233 bp = NULL; 234 if ((error = bread(devvp, (daddr_t)BBOFF, 235 amp->bsize, NOCRED, &bp)) != 0) { 236 brelse(bp); 237 goto fail; 238 } 239 amp->dostype = adoswordn(bp, 0); 240 brelse(bp); 241 242 /* basic sanity checks */ 243 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 244 error = EINVAL; 245 goto fail; 246 } 247 248 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 249 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 250 251 amp->nwords = amp->bsize >> 2; 252 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 253 amp->devvp = devvp; 254 255 mp->mnt_data = amp; 256 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 257 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 258 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 259 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 260 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 261 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 262 mp->mnt_flag |= MNT_LOCAL; 263 264 /* 265 * init anode table. 266 */ 267 for (i = 0; i < ANODEHASHSZ; i++) 268 LIST_INIT(&->anodetab[i]); 269 270 /* 271 * get the root anode, if not a valid fs this will fail. 272 */ 273 if ((error = VFS_ROOT(mp, &rvp)) != 0) 274 goto fail; 275 /* allocate and load bitmap, set free space */ 276 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 277 M_ADOSFSBITMAP, M_WAITOK); 278 if (amp->bitmap) 279 adosfs_loadbitmap(amp); 280 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 281 /* 282 * Don't need the bitmap any more if it's read-only. 283 */ 284 free(amp->bitmap, M_ADOSFSBITMAP); 285 amp->bitmap = NULL; 286 } 287 vput(rvp); 288 289 return(0); 290 291 fail: 292 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 293 (void) VOP_CLOSE(devvp, FREAD, NOCRED, l); 294 VOP_UNLOCK(devvp, 0); 295 if (amp && amp->bitmap) 296 free(amp->bitmap, M_ADOSFSBITMAP); 297 if (amp) 298 free(amp, M_ADOSFSMNT); 299 return (error); 300 } 301 302 int 303 adosfs_start(mp, flags, l) 304 struct mount *mp; 305 int flags; 306 struct lwp *l; 307 { 308 309 return (0); 310 } 311 312 int 313 adosfs_unmount(mp, mntflags, l) 314 struct mount *mp; 315 int mntflags; 316 struct lwp *l; 317 { 318 struct adosfsmount *amp; 319 int error, flags; 320 321 flags = 0; 322 if (mntflags & MNT_FORCE) 323 flags |= FORCECLOSE; 324 if ((error = vflush(mp, NULLVP, flags)) != 0) 325 return (error); 326 amp = VFSTOADOSFS(mp); 327 if (amp->devvp->v_type != VBAD) 328 amp->devvp->v_specmountpoint = NULL; 329 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 330 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, l); 331 vput(amp->devvp); 332 if (amp->bitmap) 333 free(amp->bitmap, M_ADOSFSBITMAP); 334 free(amp, M_ADOSFSMNT); 335 mp->mnt_data = NULL; 336 mp->mnt_flag &= ~MNT_LOCAL; 337 return (error); 338 } 339 340 int 341 adosfs_root(mp, vpp) 342 struct mount *mp; 343 struct vnode **vpp; 344 { 345 struct vnode *nvp; 346 int error; 347 348 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 349 return (error); 350 /* XXX verify it's a root block? */ 351 *vpp = nvp; 352 return (0); 353 } 354 355 int 356 adosfs_statvfs(mp, sbp, l) 357 struct mount *mp; 358 struct statvfs *sbp; 359 struct lwp *l; 360 { 361 struct adosfsmount *amp; 362 363 amp = VFSTOADOSFS(mp); 364 sbp->f_bsize = amp->bsize; 365 sbp->f_frsize = amp->bsize; 366 sbp->f_iosize = amp->dbsize; 367 sbp->f_blocks = amp->numblks; 368 sbp->f_bfree = amp->freeblks; 369 sbp->f_bavail = amp->freeblks; 370 sbp->f_bresvd = 0; 371 sbp->f_files = 0; /* who knows */ 372 sbp->f_ffree = 0; /* " " */ 373 sbp->f_favail = 0; /* " " */ 374 sbp->f_fresvd = 0; 375 copy_statvfs_info(sbp, mp); 376 return (0); 377 } 378 379 /* 380 * lookup an anode, check mount's hash table if not found, create 381 * return locked and referenced al la vget(vp, 1); 382 */ 383 int 384 adosfs_vget(mp, an, vpp) 385 struct mount *mp; 386 ino_t an; 387 struct vnode **vpp; 388 { 389 struct adosfsmount *amp; 390 struct vnode *vp; 391 struct anode *ap; 392 struct buf *bp; 393 char *nam, *tmp; 394 int namlen, error; 395 396 error = 0; 397 amp = VFSTOADOSFS(mp); 398 bp = NULL; 399 400 /* 401 * check hash table. we are done if found 402 */ 403 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 404 return (0); 405 406 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 407 if (error) 408 return (error); 409 410 /* 411 * setup, insert in hash, and lock before io. 412 */ 413 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 414 memset(ap, 0, sizeof(struct anode)); 415 ap->vp = vp; 416 ap->amp = amp; 417 ap->block = an; 418 ap->nwords = amp->nwords; 419 adosfs_ainshash(amp, ap); 420 421 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 422 amp->bsize, NOCRED, &bp)) != 0) { 423 brelse(bp); 424 vput(vp); 425 return (error); 426 } 427 428 /* 429 * get type and fill rest in based on that. 430 */ 431 switch (ap->type = adosfs_getblktype(amp, bp)) { 432 case AROOT: 433 vp->v_type = VDIR; 434 vp->v_flag |= VROOT; 435 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 436 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 437 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 438 ap->created.days = adoswordn(bp, ap->nwords - 7); 439 ap->created.mins = adoswordn(bp, ap->nwords - 6); 440 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 441 break; 442 case ALDIR: 443 case ADIR: 444 vp->v_type = VDIR; 445 break; 446 case ALFILE: 447 case AFILE: 448 vp->v_type = VREG; 449 ap->fsize = adoswordn(bp, ap->nwords - 47); 450 break; 451 case ASLINK: /* XXX soft link */ 452 vp->v_type = VLNK; 453 /* 454 * convert from BCPL string and 455 * from: "part:dir/file" to: "/part/dir/file" 456 */ 457 nam = bp->b_data + (6 * sizeof(long)); 458 namlen = strlen(nam); 459 tmp = nam; 460 while (*tmp && *tmp != ':') 461 tmp++; 462 if (*tmp == 0) { 463 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 464 memcpy(ap->slinkto, nam, namlen); 465 } else if (*nam == ':') { 466 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 467 memcpy(ap->slinkto, nam, namlen); 468 ap->slinkto[0] = '/'; 469 } else { 470 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 471 ap->slinkto[0] = '/'; 472 memcpy(&ap->slinkto[1], nam, namlen); 473 ap->slinkto[tmp - nam + 1] = '/'; 474 namlen++; 475 } 476 ap->slinkto[namlen] = 0; 477 ap->fsize = namlen; 478 break; 479 default: 480 brelse(bp); 481 vput(vp); 482 return (EINVAL); 483 } 484 485 /* 486 * Get appropriate data from this block; hard link needs 487 * to get other data from the "real" block. 488 */ 489 490 /* 491 * copy in name (from original block) 492 */ 493 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 494 namlen = *(u_char *)nam++; 495 if (namlen > 30) { 496 #ifdef DIAGNOSTIC 497 printf("adosfs: aget: name length too long blk %llu\n", 498 (unsigned long long)an); 499 #endif 500 brelse(bp); 501 vput(vp); 502 return (EINVAL); 503 } 504 memcpy(ap->name, nam, namlen); 505 ap->name[namlen] = 0; 506 507 /* 508 * if dir alloc hash table and copy it in 509 */ 510 if (vp->v_type == VDIR) { 511 int i; 512 513 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 514 ap->ntabent = ANODETABENT(ap); 515 ap->tabi = (int *)&ap->tab[ap->ntabent]; 516 memset(ap->tabi, 0, ANODETABSZ(ap)); 517 for (i = 0; i < ap->ntabent; i++) 518 ap->tab[i] = adoswordn(bp, i + 6); 519 } 520 521 /* 522 * misc. 523 */ 524 ap->pblock = adoswordn(bp, ap->nwords - 3); 525 ap->hashf = adoswordn(bp, ap->nwords - 4); 526 ap->linknext = adoswordn(bp, ap->nwords - 10); 527 ap->linkto = adoswordn(bp, ap->nwords - 11); 528 529 /* 530 * setup last indirect block cache. 531 */ 532 ap->lastlindblk = 0; 533 if (ap->type == AFILE) { 534 ap->lastindblk = ap->block; 535 if (adoswordn(bp, ap->nwords - 10)) 536 ap->linkto = ap->block; 537 } else if (ap->type == ALFILE) { 538 ap->lastindblk = ap->linkto; 539 brelse(bp); 540 bp = NULL; 541 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 542 amp->bsize, NOCRED, &bp); 543 if (error) { 544 brelse(bp); 545 vput(vp); 546 return (error); 547 } 548 ap->fsize = adoswordn(bp, ap->nwords - 47); 549 /* 550 * Should ap->block be set to the real file header block? 551 */ 552 ap->block = ap->linkto; 553 } 554 555 if (ap->type == AROOT) { 556 ap->adprot = 15; 557 ap->uid = amp->uid; 558 ap->gid = amp->gid; 559 } else { 560 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 561 /* 562 * ADOS directories do not have a `x' protection bit as 563 * it is known in VFS; this functionality is fulfilled 564 * by the ADOS `r' bit. 565 * 566 * To retain the ADOS behaviour, fake execute permissions 567 * in that case. 568 */ 569 if ((ap->type == ADIR || ap->type == ALDIR) && 570 (ap->adprot & 0x00000008) == 0) 571 ap->adprot &= ~0x00000002; 572 573 /* 574 * Get uid/gid from extensions in file header 575 * (really need to know if this is a muFS partition) 576 */ 577 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 578 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 579 if (ap->uid || ap->gid) { 580 if (ap->uid == 0xffff) 581 ap->uid = 0; 582 if (ap->gid == 0xffff) 583 ap->gid = 0; 584 ap->adprot |= 0x40000000; /* Kludge */ 585 } 586 else { 587 /* 588 * uid & gid extension don't exist, 589 * so use the mount-point uid/gid 590 */ 591 ap->uid = amp->uid; 592 ap->gid = amp->gid; 593 } 594 } 595 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 596 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 597 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 598 599 genfs_node_init(vp, &adosfs_genfsops); 600 *vpp = vp; 601 brelse(bp); 602 vp->v_size = ap->fsize; 603 return (0); 604 } 605 606 /* 607 * Load the bitmap into memory, and count the number of available 608 * blocks. 609 * The bitmap will be released if the filesystem is read-only; it's 610 * only needed to find the free space. 611 */ 612 int 613 adosfs_loadbitmap(amp) 614 struct adosfsmount *amp; 615 { 616 struct buf *bp, *mapbp; 617 u_long bn; 618 int blkix, endix, mapix; 619 int bmsize; 620 int error; 621 622 bp = mapbp = NULL; 623 bn = amp->rootb; 624 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 625 NOCRED, &bp)) != 0) { 626 brelse(bp); 627 return (error); 628 } 629 blkix = amp->nwords - 49; 630 endix = amp->nwords - 24; 631 mapix = 0; 632 bmsize = (amp->numblks + 31) / 32; 633 while (mapix < bmsize) { 634 int n; 635 u_long bits; 636 637 if (adoswordn(bp, blkix) == 0) 638 break; 639 if (mapbp != NULL) 640 brelse(mapbp); 641 if ((error = bread(amp->devvp, 642 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 643 NOCRED, &mapbp)) != 0) 644 break; 645 if (adoscksum(mapbp, amp->nwords)) { 646 #ifdef DIAGNOSTIC 647 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 648 adoswordn(bp, blkix)); 649 #endif 650 /* XXX Force read-only? Set free space 0? */ 651 break; 652 } 653 n = 1; 654 while (n < amp->nwords && mapix < bmsize) { 655 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 656 ++n; 657 if (mapix == bmsize && amp->numblks & 31) 658 bits &= ~(0xffffffff << (amp->numblks & 31)); 659 while (bits) { 660 if (bits & 1) 661 ++amp->freeblks; 662 bits >>= 1; 663 } 664 } 665 ++blkix; 666 if (mapix < bmsize && blkix == endix) { 667 bn = adoswordn(bp, blkix); 668 brelse(bp); 669 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 670 amp->bsize, NOCRED, &bp)) != 0) 671 break; 672 /* 673 * Why is there no checksum on these blocks? 674 */ 675 blkix = 0; 676 endix = amp->nwords - 1; 677 } 678 } 679 if (bp) 680 brelse(bp); 681 if (mapbp) 682 brelse(mapbp); 683 return (error); 684 } 685 686 687 /* 688 * File handle to vnode 689 * 690 * Have to be really careful about stale file handles: 691 * - check that the inode number is in range 692 * - call iget() to get the locked inode 693 * - check for an unallocated inode (i_mode == 0) 694 * - check that the generation number matches 695 */ 696 697 struct ifid { 698 ushort ifid_len; 699 ushort ifid_pad; 700 int ifid_ino; 701 long ifid_start; 702 }; 703 704 int 705 adosfs_fhtovp(mp, fhp, vpp) 706 struct mount *mp; 707 struct fid *fhp; 708 struct vnode **vpp; 709 { 710 struct ifid *ifhp = (struct ifid *)fhp; 711 #if 0 712 struct anode *ap; 713 #endif 714 struct vnode *nvp; 715 int error; 716 717 #ifdef ADOSFS_DIAGNOSTIC 718 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 719 #endif 720 721 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 722 *vpp = NULLVP; 723 return (error); 724 } 725 #if 0 726 ap = VTOA(nvp); 727 if (ap->inode.iso_mode == 0) { 728 vput(nvp); 729 *vpp = NULLVP; 730 return (ESTALE); 731 } 732 #endif 733 *vpp = nvp; 734 return(0); 735 } 736 737 int 738 adosfs_vptofh(vp, fhp) 739 struct vnode *vp; 740 struct fid *fhp; 741 { 742 struct anode *ap = VTOA(vp); 743 struct ifid *ifhp; 744 745 ifhp = (struct ifid *)fhp; 746 ifhp->ifid_len = sizeof(struct ifid); 747 748 ifhp->ifid_ino = ap->block; 749 ifhp->ifid_start = ap->block; 750 751 #ifdef ADOSFS_DIAGNOSTIC 752 printf("advptofh(%x, %x)\n", vp, fhp); 753 #endif 754 return(0); 755 } 756 757 int 758 adosfs_quotactl(mp, cmds, uid, arg, l) 759 struct mount *mp; 760 int cmds; 761 uid_t uid; 762 void *arg; 763 struct lwp *l; 764 { 765 return(EOPNOTSUPP); 766 } 767 768 int 769 adosfs_sync(mp, waitfor, uc, l) 770 struct mount *mp; 771 int waitfor; 772 struct ucred *uc; 773 struct lwp *l; 774 { 775 #ifdef ADOSFS_DIAGNOSTIC 776 printf("ad_sync(%x, %x)\n", mp, waitfor); 777 #endif 778 return(0); 779 } 780 781 void 782 adosfs_init() 783 { 784 #ifdef _LKM 785 malloc_type_attach(M_ADOSFSMNT); 786 malloc_type_attach(M_ANODE); 787 malloc_type_attach(M_ADOSFSBITMAP); 788 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 789 &pool_allocator_nointr); 790 #endif 791 simple_lock_init(&adosfs_hashlock); 792 } 793 794 void 795 adosfs_done() 796 { 797 #ifdef _LKM 798 pool_destroy(&adosfs_node_pool); 799 malloc_type_detach(M_ADOSFSBITMAP); 800 malloc_type_detach(M_ANODE); 801 malloc_type_detach(M_ADOSFSMNT); 802 #endif 803 } 804 805 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 806 { 807 808 sysctl_createv(clog, 0, NULL, NULL, 809 CTLFLAG_PERMANENT, 810 CTLTYPE_NODE, "vfs", NULL, 811 NULL, 0, NULL, 0, 812 CTL_VFS, CTL_EOL); 813 sysctl_createv(clog, 0, NULL, NULL, 814 CTLFLAG_PERMANENT, 815 CTLTYPE_NODE, "adosfs", 816 SYSCTL_DESCR("AmigaDOS file system"), 817 NULL, 0, NULL, 0, 818 CTL_VFS, 16, CTL_EOL); 819 /* 820 * XXX the "16" above could be dynamic, thereby eliminating 821 * one more instance of the "number to vfs" mapping problem, 822 * but "16" is the order as taken from sys/mount.h 823 */ 824 } 825 826 /* 827 * vfs generic function call table 828 */ 829 830 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 831 832 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 833 &adosfs_vnodeop_opv_desc, 834 NULL, 835 }; 836 837 struct vfsops adosfs_vfsops = { 838 MOUNT_ADOSFS, 839 adosfs_mount, 840 adosfs_start, 841 adosfs_unmount, 842 adosfs_root, 843 adosfs_quotactl, 844 adosfs_statvfs, 845 adosfs_sync, 846 adosfs_vget, 847 adosfs_fhtovp, 848 adosfs_vptofh, 849 adosfs_init, 850 NULL, 851 adosfs_done, 852 NULL, /* vfs_mountroot */ 853 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 854 vfs_stdextattrctl, 855 adosfs_vnodeopv_descs, 856 }; 857 VFS_ATTACH(adosfs_vfsops); 858
Indexes created Mon Sep 22 21:09:42 GMT 2025