advfsops.c revision 1.29
1 /* $NetBSD: advfsops.c,v 1.29 2006/07/13 12:00:25 martin 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 1.29 2006/07/13 12:00:25 martin 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 struct proc *p; 106 int error; 107 mode_t accessmode; 108 109 p = l->l_proc; 110 if (mp->mnt_flag & MNT_GETARGS) { 111 amp = VFSTOADOSFS(mp); 112 if (amp == NULL) 113 return EIO; 114 args.uid = amp->uid; 115 args.gid = amp->gid; 116 args.mask = amp->mask; 117 args.fspec = NULL; 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 ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 128 return EOPNOTSUPP; 129 130 /* 131 * Not an update, or updating the name: look up the name 132 * and verify that it refers to a sensible block device. 133 */ 134 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 135 if ((error = namei(ndp)) != 0) 136 return (error); 137 devvp = ndp->ni_vp; 138 139 if (devvp->v_type != VBLK) { 140 vrele(devvp); 141 return (ENOTBLK); 142 } 143 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 144 vrele(devvp); 145 return (ENXIO); 146 } 147 /* 148 * If mount by non-root, then verify that user has necessary 149 * permissions on the device. 150 */ 151 if (kauth_cred_geteuid(p->p_cred) != 0) { 152 accessmode = VREAD; 153 if ((mp->mnt_flag & MNT_RDONLY) == 0) 154 accessmode |= VWRITE; 155 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 156 error = VOP_ACCESS(devvp, accessmode, p->p_cred, l); 157 if (error) { 158 vput(devvp); 159 return (error); 160 } 161 VOP_UNLOCK(devvp, 0); 162 } 163 /* MNT_UPDATE? */ 164 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 165 vrele(devvp); 166 return (error); 167 } 168 amp = VFSTOADOSFS(mp); 169 amp->uid = args.uid; 170 amp->gid = args.gid; 171 amp->mask = args.mask; 172 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 173 mp, l); 174 } 175 176 int 177 adosfs_mountfs(devvp, mp, l) 178 struct vnode *devvp; 179 struct mount *mp; 180 struct lwp *l; 181 { 182 struct disklabel dl; 183 struct partition *parp; 184 struct adosfsmount *amp; 185 struct buf *bp; 186 struct vnode *rvp; 187 int error, part, i; 188 189 part = DISKPART(devvp->v_rdev); 190 amp = NULL; 191 192 /* 193 * Disallow multiple mounts of the same device. 194 * Disallow mounting of a device that is currently in use 195 * (except for root, which might share swap device for miniroot). 196 * Flush out any old buffers remaining from a previous use. 197 */ 198 if ((error = vfs_mountedon(devvp)) != 0) 199 return (error); 200 if (vcount(devvp) > 1 && devvp != rootvp) 201 return (EBUSY); 202 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_cred, l, 0, 0)) 203 != 0) 204 return (error); 205 206 /* 207 * open blkdev and read root block 208 */ 209 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, l)) != 0) 210 return (error); 211 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, l); 212 if (error) 213 goto fail; 214 215 parp = &dl.d_partitions[part]; 216 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 217 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 218 amp->mp = mp; 219 if (dl.d_type == DTYPE_FLOPPY) { 220 amp->bsize = dl.d_secsize; 221 amp->secsperblk = 1; 222 } 223 else { 224 amp->bsize = parp->p_fsize * parp->p_frag; 225 amp->secsperblk = parp->p_frag; 226 } 227 228 /* invalid fs ? */ 229 if (amp->secsperblk == 0) { 230 error = EINVAL; 231 goto fail; 232 } 233 234 bp = NULL; 235 if ((error = bread(devvp, (daddr_t)BBOFF, 236 amp->bsize, NOCRED, &bp)) != 0) { 237 brelse(bp); 238 goto fail; 239 } 240 amp->dostype = adoswordn(bp, 0); 241 brelse(bp); 242 243 /* basic sanity checks */ 244 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 245 error = EINVAL; 246 goto fail; 247 } 248 249 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 250 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 251 252 amp->nwords = amp->bsize >> 2; 253 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 254 amp->devvp = devvp; 255 256 mp->mnt_data = amp; 257 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 258 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 259 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 260 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 261 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 262 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 263 mp->mnt_flag |= MNT_LOCAL; 264 265 /* 266 * init anode table. 267 */ 268 for (i = 0; i < ANODEHASHSZ; i++) 269 LIST_INIT(&->anodetab[i]); 270 271 /* 272 * get the root anode, if not a valid fs this will fail. 273 */ 274 if ((error = VFS_ROOT(mp, &rvp)) != 0) 275 goto fail; 276 /* allocate and load bitmap, set free space */ 277 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 278 M_ADOSFSBITMAP, M_WAITOK); 279 if (amp->bitmap) 280 adosfs_loadbitmap(amp); 281 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 282 /* 283 * Don't need the bitmap any more if it's read-only. 284 */ 285 free(amp->bitmap, M_ADOSFSBITMAP); 286 amp->bitmap = NULL; 287 } 288 vput(rvp); 289 290 return(0); 291 292 fail: 293 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 294 (void) VOP_CLOSE(devvp, FREAD, NOCRED, l); 295 VOP_UNLOCK(devvp, 0); 296 if (amp && amp->bitmap) 297 free(amp->bitmap, M_ADOSFSBITMAP); 298 if (amp) 299 free(amp, M_ADOSFSMNT); 300 return (error); 301 } 302 303 int 304 adosfs_start(mp, flags, l) 305 struct mount *mp; 306 int flags; 307 struct lwp *l; 308 { 309 310 return (0); 311 } 312 313 int 314 adosfs_unmount(mp, mntflags, l) 315 struct mount *mp; 316 int mntflags; 317 struct lwp *l; 318 { 319 struct adosfsmount *amp; 320 int error, flags; 321 322 flags = 0; 323 if (mntflags & MNT_FORCE) 324 flags |= FORCECLOSE; 325 if ((error = vflush(mp, NULLVP, flags)) != 0) 326 return (error); 327 amp = VFSTOADOSFS(mp); 328 if (amp->devvp->v_type != VBAD) 329 amp->devvp->v_specmountpoint = NULL; 330 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 331 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, l); 332 vput(amp->devvp); 333 if (amp->bitmap) 334 free(amp->bitmap, M_ADOSFSBITMAP); 335 free(amp, M_ADOSFSMNT); 336 mp->mnt_data = NULL; 337 mp->mnt_flag &= ~MNT_LOCAL; 338 return (error); 339 } 340 341 int 342 adosfs_root(mp, vpp) 343 struct mount *mp; 344 struct vnode **vpp; 345 { 346 struct vnode *nvp; 347 int error; 348 349 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 350 return (error); 351 /* XXX verify it's a root block? */ 352 *vpp = nvp; 353 return (0); 354 } 355 356 int 357 adosfs_statvfs(mp, sbp, l) 358 struct mount *mp; 359 struct statvfs *sbp; 360 struct lwp *l; 361 { 362 struct adosfsmount *amp; 363 364 amp = VFSTOADOSFS(mp); 365 sbp->f_bsize = amp->bsize; 366 sbp->f_frsize = amp->bsize; 367 sbp->f_iosize = amp->dbsize; 368 sbp->f_blocks = amp->numblks; 369 sbp->f_bfree = amp->freeblks; 370 sbp->f_bavail = amp->freeblks; 371 sbp->f_bresvd = 0; 372 sbp->f_files = 0; /* who knows */ 373 sbp->f_ffree = 0; /* " " */ 374 sbp->f_favail = 0; /* " " */ 375 sbp->f_fresvd = 0; 376 copy_statvfs_info(sbp, mp); 377 return (0); 378 } 379 380 /* 381 * lookup an anode, check mount's hash table if not found, create 382 * return locked and referenced al la vget(vp, 1); 383 */ 384 int 385 adosfs_vget(mp, an, vpp) 386 struct mount *mp; 387 ino_t an; 388 struct vnode **vpp; 389 { 390 struct adosfsmount *amp; 391 struct vnode *vp; 392 struct anode *ap; 393 struct buf *bp; 394 char *nam, *tmp; 395 int namlen, error; 396 397 error = 0; 398 amp = VFSTOADOSFS(mp); 399 bp = NULL; 400 401 /* 402 * check hash table. we are done if found 403 */ 404 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 405 return (0); 406 407 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 408 if (error) 409 return (error); 410 411 /* 412 * setup, insert in hash, and lock before io. 413 */ 414 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 415 memset(ap, 0, sizeof(struct anode)); 416 ap->vp = vp; 417 ap->amp = amp; 418 ap->block = an; 419 ap->nwords = amp->nwords; 420 adosfs_ainshash(amp, ap); 421 422 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 423 amp->bsize, NOCRED, &bp)) != 0) { 424 brelse(bp); 425 vput(vp); 426 return (error); 427 } 428 429 /* 430 * get type and fill rest in based on that. 431 */ 432 switch (ap->type = adosfs_getblktype(amp, bp)) { 433 case AROOT: 434 vp->v_type = VDIR; 435 vp->v_flag |= VROOT; 436 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 437 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 438 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 439 ap->created.days = adoswordn(bp, ap->nwords - 7); 440 ap->created.mins = adoswordn(bp, ap->nwords - 6); 441 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 442 break; 443 case ALDIR: 444 case ADIR: 445 vp->v_type = VDIR; 446 break; 447 case ALFILE: 448 case AFILE: 449 vp->v_type = VREG; 450 ap->fsize = adoswordn(bp, ap->nwords - 47); 451 break; 452 case ASLINK: /* XXX soft link */ 453 vp->v_type = VLNK; 454 /* 455 * convert from BCPL string and 456 * from: "part:dir/file" to: "/part/dir/file" 457 */ 458 nam = bp->b_data + (6 * sizeof(long)); 459 namlen = strlen(nam); 460 tmp = nam; 461 while (*tmp && *tmp != ':') 462 tmp++; 463 if (*tmp == 0) { 464 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 465 memcpy(ap->slinkto, nam, namlen); 466 } else if (*nam == ':') { 467 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 468 memcpy(ap->slinkto, nam, namlen); 469 ap->slinkto[0] = '/'; 470 } else { 471 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 472 ap->slinkto[0] = '/'; 473 memcpy(&ap->slinkto[1], nam, namlen); 474 ap->slinkto[tmp - nam + 1] = '/'; 475 namlen++; 476 } 477 ap->slinkto[namlen] = 0; 478 ap->fsize = namlen; 479 break; 480 default: 481 brelse(bp); 482 vput(vp); 483 return (EINVAL); 484 } 485 486 /* 487 * Get appropriate data from this block; hard link needs 488 * to get other data from the "real" block. 489 */ 490 491 /* 492 * copy in name (from original block) 493 */ 494 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 495 namlen = *(u_char *)nam++; 496 if (namlen > 30) { 497 #ifdef DIAGNOSTIC 498 printf("adosfs: aget: name length too long blk %llu\n", 499 (unsigned long long)an); 500 #endif 501 brelse(bp); 502 vput(vp); 503 return (EINVAL); 504 } 505 memcpy(ap->name, nam, namlen); 506 ap->name[namlen] = 0; 507 508 /* 509 * if dir alloc hash table and copy it in 510 */ 511 if (vp->v_type == VDIR) { 512 int i; 513 514 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 515 ap->ntabent = ANODETABENT(ap); 516 ap->tabi = (int *)&ap->tab[ap->ntabent]; 517 memset(ap->tabi, 0, ANODETABSZ(ap)); 518 for (i = 0; i < ap->ntabent; i++) 519 ap->tab[i] = adoswordn(bp, i + 6); 520 } 521 522 /* 523 * misc. 524 */ 525 ap->pblock = adoswordn(bp, ap->nwords - 3); 526 ap->hashf = adoswordn(bp, ap->nwords - 4); 527 ap->linknext = adoswordn(bp, ap->nwords - 10); 528 ap->linkto = adoswordn(bp, ap->nwords - 11); 529 530 /* 531 * setup last indirect block cache. 532 */ 533 ap->lastlindblk = 0; 534 if (ap->type == AFILE) { 535 ap->lastindblk = ap->block; 536 if (adoswordn(bp, ap->nwords - 10)) 537 ap->linkto = ap->block; 538 } else if (ap->type == ALFILE) { 539 ap->lastindblk = ap->linkto; 540 brelse(bp); 541 bp = NULL; 542 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 543 amp->bsize, NOCRED, &bp); 544 if (error) { 545 brelse(bp); 546 vput(vp); 547 return (error); 548 } 549 ap->fsize = adoswordn(bp, ap->nwords - 47); 550 /* 551 * Should ap->block be set to the real file header block? 552 */ 553 ap->block = ap->linkto; 554 } 555 556 if (ap->type == AROOT) { 557 ap->adprot = 15; 558 ap->uid = amp->uid; 559 ap->gid = amp->gid; 560 } else { 561 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 562 /* 563 * ADOS directories do not have a `x' protection bit as 564 * it is known in VFS; this functionality is fulfilled 565 * by the ADOS `r' bit. 566 * 567 * To retain the ADOS behaviour, fake execute permissions 568 * in that case. 569 */ 570 if ((ap->type == ADIR || ap->type == ALDIR) && 571 (ap->adprot & 0x00000008) == 0) 572 ap->adprot &= ~0x00000002; 573 574 /* 575 * Get uid/gid from extensions in file header 576 * (really need to know if this is a muFS partition) 577 */ 578 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 579 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 580 if (ap->uid || ap->gid) { 581 if (ap->uid == 0xffff) 582 ap->uid = 0; 583 if (ap->gid == 0xffff) 584 ap->gid = 0; 585 ap->adprot |= 0x40000000; /* Kludge */ 586 } 587 else { 588 /* 589 * uid & gid extension don't exist, 590 * so use the mount-point uid/gid 591 */ 592 ap->uid = amp->uid; 593 ap->gid = amp->gid; 594 } 595 } 596 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 597 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 598 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 599 600 genfs_node_init(vp, &adosfs_genfsops); 601 *vpp = vp; 602 brelse(bp); 603 vp->v_size = ap->fsize; 604 return (0); 605 } 606 607 /* 608 * Load the bitmap into memory, and count the number of available 609 * blocks. 610 * The bitmap will be released if the filesystem is read-only; it's 611 * only needed to find the free space. 612 */ 613 int 614 adosfs_loadbitmap(amp) 615 struct adosfsmount *amp; 616 { 617 struct buf *bp, *mapbp; 618 u_long bn; 619 int blkix, endix, mapix; 620 int bmsize; 621 int error; 622 623 bp = mapbp = NULL; 624 bn = amp->rootb; 625 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 626 NOCRED, &bp)) != 0) { 627 brelse(bp); 628 return (error); 629 } 630 blkix = amp->nwords - 49; 631 endix = amp->nwords - 24; 632 mapix = 0; 633 bmsize = (amp->numblks + 31) / 32; 634 while (mapix < bmsize) { 635 int n; 636 u_long bits; 637 638 if (adoswordn(bp, blkix) == 0) 639 break; 640 if (mapbp != NULL) 641 brelse(mapbp); 642 if ((error = bread(amp->devvp, 643 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 644 NOCRED, &mapbp)) != 0) 645 break; 646 if (adoscksum(mapbp, amp->nwords)) { 647 #ifdef DIAGNOSTIC 648 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 649 adoswordn(bp, blkix)); 650 #endif 651 /* XXX Force read-only? Set free space 0? */ 652 break; 653 } 654 n = 1; 655 while (n < amp->nwords && mapix < bmsize) { 656 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 657 ++n; 658 if (mapix == bmsize && amp->numblks & 31) 659 bits &= ~(0xffffffff << (amp->numblks & 31)); 660 while (bits) { 661 if (bits & 1) 662 ++amp->freeblks; 663 bits >>= 1; 664 } 665 } 666 ++blkix; 667 if (mapix < bmsize && blkix == endix) { 668 bn = adoswordn(bp, blkix); 669 brelse(bp); 670 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 671 amp->bsize, NOCRED, &bp)) != 0) 672 break; 673 /* 674 * Why is there no checksum on these blocks? 675 */ 676 blkix = 0; 677 endix = amp->nwords - 1; 678 } 679 } 680 if (bp) 681 brelse(bp); 682 if (mapbp) 683 brelse(mapbp); 684 return (error); 685 } 686 687 688 /* 689 * File handle to vnode 690 * 691 * Have to be really careful about stale file handles: 692 * - check that the inode number is in range 693 * - call iget() to get the locked inode 694 * - check for an unallocated inode (i_mode == 0) 695 * - check that the generation number matches 696 */ 697 698 struct ifid { 699 ushort ifid_len; 700 ushort ifid_pad; 701 int ifid_ino; 702 long ifid_start; 703 }; 704 705 int 706 adosfs_fhtovp(mp, fhp, vpp) 707 struct mount *mp; 708 struct fid *fhp; 709 struct vnode **vpp; 710 { 711 struct ifid ifh; 712 #if 0 713 struct anode *ap; 714 #endif 715 struct vnode *nvp; 716 int error; 717 718 if (fhp->fid_len != sizeof(struct ifid)) 719 return EINVAL; 720 721 #ifdef ADOSFS_DIAGNOSTIC 722 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 723 #endif 724 725 memcpy(&ifh, fhp, sizeof(ifh)); 726 727 if ((error = VFS_VGET(mp, ifh.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_vptofh(vp, fhp, fh_size) 745 struct vnode *vp; 746 struct fid *fhp; 747 size_t *fh_size; 748 { 749 struct anode *ap = VTOA(vp); 750 struct ifid ifh; 751 752 if (*fh_size < sizeof(struct ifid)) { 753 *fh_size = sizeof(struct ifid); 754 return E2BIG; 755 } 756 *fh_size = sizeof(struct ifid); 757 758 memset(&ifh, 0, sizeof(ifh)); 759 ifh.ifid_len = sizeof(struct ifid); 760 ifh.ifid_ino = ap->block; 761 ifh.ifid_start = ap->block; 762 memcpy(fhp, &ifh, sizeof(ifh)); 763 764 #ifdef ADOSFS_DIAGNOSTIC 765 printf("advptofh(%x, %x)\n", vp, fhp); 766 #endif 767 return(0); 768 } 769 770 int 771 adosfs_quotactl(mp, cmds, uid, arg, l) 772 struct mount *mp; 773 int cmds; 774 uid_t uid; 775 void *arg; 776 struct lwp *l; 777 { 778 return(EOPNOTSUPP); 779 } 780 781 int 782 adosfs_sync(mp, waitfor, uc, l) 783 struct mount *mp; 784 int waitfor; 785 kauth_cred_t uc; 786 struct lwp *l; 787 { 788 #ifdef ADOSFS_DIAGNOSTIC 789 printf("ad_sync(%x, %x)\n", mp, waitfor); 790 #endif 791 return(0); 792 } 793 794 void 795 adosfs_init() 796 { 797 #ifdef _LKM 798 malloc_type_attach(M_ADOSFSMNT); 799 malloc_type_attach(M_ANODE); 800 malloc_type_attach(M_ADOSFSBITMAP); 801 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 802 &pool_allocator_nointr); 803 #endif 804 simple_lock_init(&adosfs_hashlock); 805 } 806 807 void 808 adosfs_done() 809 { 810 #ifdef _LKM 811 pool_destroy(&adosfs_node_pool); 812 malloc_type_detach(M_ADOSFSBITMAP); 813 malloc_type_detach(M_ANODE); 814 malloc_type_detach(M_ADOSFSMNT); 815 #endif 816 } 817 818 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 819 { 820 821 sysctl_createv(clog, 0, NULL, NULL, 822 CTLFLAG_PERMANENT, 823 CTLTYPE_NODE, "vfs", NULL, 824 NULL, 0, NULL, 0, 825 CTL_VFS, CTL_EOL); 826 sysctl_createv(clog, 0, NULL, NULL, 827 CTLFLAG_PERMANENT, 828 CTLTYPE_NODE, "adosfs", 829 SYSCTL_DESCR("AmigaDOS file system"), 830 NULL, 0, NULL, 0, 831 CTL_VFS, 16, CTL_EOL); 832 /* 833 * XXX the "16" above could be dynamic, thereby eliminating 834 * one more instance of the "number to vfs" mapping problem, 835 * but "16" is the order as taken from sys/mount.h 836 */ 837 } 838 839 /* 840 * vfs generic function call table 841 */ 842 843 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 844 845 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 846 &adosfs_vnodeop_opv_desc, 847 NULL, 848 }; 849 850 struct vfsops adosfs_vfsops = { 851 MOUNT_ADOSFS, 852 adosfs_mount, 853 adosfs_start, 854 adosfs_unmount, 855 adosfs_root, 856 adosfs_quotactl, 857 adosfs_statvfs, 858 adosfs_sync, 859 adosfs_vget, 860 adosfs_fhtovp, 861 adosfs_vptofh, 862 adosfs_init, 863 NULL, 864 adosfs_done, 865 NULL, /* vfs_mountroot */ 866 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 867 vfs_stdextattrctl, 868 adosfs_vnodeopv_descs, 869 }; 870 VFS_ATTACH(adosfs_vfsops); 871
Indexes created Wed Sep 24 05:09:52 GMT 2025