advfsops.c revision 1.25
1 /* $NetBSD: advfsops.c,v 1.25 2005/09/23 12:10:32 jmmv 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 1.25 2005/09/23 12:10:32 jmmv 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 proc *)); 65 int adosfs_start __P((struct mount *, int, struct proc *)); 66 int adosfs_unmount __P((struct mount *, int, struct proc *)); 67 int adosfs_root __P((struct mount *, struct vnode **)); 68 int adosfs_quotactl __P((struct mount *, int, uid_t, void *, struct proc *)); 69 int adosfs_statvfs __P((struct mount *, struct statvfs *, struct proc *)); 70 int adosfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 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 proc *)); 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, p) 95 struct mount *mp; 96 const char *path; 97 void *data; 98 struct nameidata *ndp; 99 struct proc *p; 100 { 101 struct vnode *devvp; 102 struct adosfs_args args; 103 struct adosfsmount *amp; 104 int error; 105 mode_t accessmode; 106 107 if (mp->mnt_flag & MNT_GETARGS) { 108 amp = VFSTOADOSFS(mp); 109 if (amp == NULL) 110 return EIO; 111 args.uid = amp->uid; 112 args.gid = amp->gid; 113 args.mask = amp->mask; 114 args.fspec = NULL; 115 return copyout(&args, data, sizeof(args)); 116 } 117 error = copyin(data, &args, sizeof(struct adosfs_args)); 118 if (error) 119 return(error); 120 121 if ((mp->mnt_flag & MNT_RDONLY) == 0) 122 return (EROFS); 123 124 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 125 return EOPNOTSUPP; 126 127 /* 128 * Not an update, or updating the name: look up the name 129 * and verify that it refers to a sensible block device. 130 */ 131 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 132 if ((error = namei(ndp)) != 0) 133 return (error); 134 devvp = ndp->ni_vp; 135 136 if (devvp->v_type != VBLK) { 137 vrele(devvp); 138 return (ENOTBLK); 139 } 140 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 141 vrele(devvp); 142 return (ENXIO); 143 } 144 /* 145 * If mount by non-root, then verify that user has necessary 146 * permissions on the device. 147 */ 148 if (p->p_ucred->cr_uid != 0) { 149 accessmode = VREAD; 150 if ((mp->mnt_flag & MNT_RDONLY) == 0) 151 accessmode |= VWRITE; 152 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 153 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 154 if (error) { 155 vput(devvp); 156 return (error); 157 } 158 VOP_UNLOCK(devvp, 0); 159 } 160 /* MNT_UPDATE? */ 161 if ((error = adosfs_mountfs(devvp, mp, p)) != 0) { 162 vrele(devvp); 163 return (error); 164 } 165 amp = VFSTOADOSFS(mp); 166 amp->uid = args.uid; 167 amp->gid = args.gid; 168 amp->mask = args.mask; 169 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 170 mp, p); 171 } 172 173 int 174 adosfs_mountfs(devvp, mp, p) 175 struct vnode *devvp; 176 struct mount *mp; 177 struct proc *p; 178 { 179 struct disklabel dl; 180 struct partition *parp; 181 struct adosfsmount *amp; 182 struct buf *bp; 183 struct vnode *rvp; 184 int error, part, i; 185 186 part = DISKPART(devvp->v_rdev); 187 amp = NULL; 188 189 /* 190 * Disallow multiple mounts of the same device. 191 * Disallow mounting of a device that is currently in use 192 * (except for root, which might share swap device for miniroot). 193 * Flush out any old buffers remaining from a previous use. 194 */ 195 if ((error = vfs_mountedon(devvp)) != 0) 196 return (error); 197 if (vcount(devvp) > 1 && devvp != rootvp) 198 return (EBUSY); 199 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 200 return (error); 201 202 /* 203 * open blkdev and read root block 204 */ 205 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, p)) != 0) 206 return (error); 207 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, p); 208 if (error) 209 goto fail; 210 211 parp = &dl.d_partitions[part]; 212 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 213 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 214 amp->mp = mp; 215 if (dl.d_type == DTYPE_FLOPPY) { 216 amp->bsize = dl.d_secsize; 217 amp->secsperblk = 1; 218 } 219 else { 220 amp->bsize = parp->p_fsize * parp->p_frag; 221 amp->secsperblk = parp->p_frag; 222 } 223 224 /* invalid fs ? */ 225 if (amp->secsperblk == 0) { 226 error = EINVAL; 227 goto fail; 228 } 229 230 bp = NULL; 231 if ((error = bread(devvp, (daddr_t)BBOFF, 232 amp->bsize, NOCRED, &bp)) != 0) { 233 brelse(bp); 234 goto fail; 235 } 236 amp->dostype = adoswordn(bp, 0); 237 brelse(bp); 238 239 /* basic sanity checks */ 240 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 241 error = EINVAL; 242 goto fail; 243 } 244 245 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 246 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 247 248 amp->nwords = amp->bsize >> 2; 249 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 250 amp->devvp = devvp; 251 252 mp->mnt_data = amp; 253 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 254 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 255 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 256 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 257 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 258 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 259 mp->mnt_flag |= MNT_LOCAL; 260 261 /* 262 * init anode table. 263 */ 264 for (i = 0; i < ANODEHASHSZ; i++) 265 LIST_INIT(&->anodetab[i]); 266 267 /* 268 * get the root anode, if not a valid fs this will fail. 269 */ 270 if ((error = VFS_ROOT(mp, &rvp)) != 0) 271 goto fail; 272 /* allocate and load bitmap, set free space */ 273 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 274 M_ADOSFSBITMAP, M_WAITOK); 275 if (amp->bitmap) 276 adosfs_loadbitmap(amp); 277 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 278 /* 279 * Don't need the bitmap any more if it's read-only. 280 */ 281 free(amp->bitmap, M_ADOSFSBITMAP); 282 amp->bitmap = NULL; 283 } 284 vput(rvp); 285 286 return(0); 287 288 fail: 289 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 290 (void) VOP_CLOSE(devvp, FREAD, NOCRED, p); 291 VOP_UNLOCK(devvp, 0); 292 if (amp && amp->bitmap) 293 free(amp->bitmap, M_ADOSFSBITMAP); 294 if (amp) 295 free(amp, M_ADOSFSMNT); 296 return (error); 297 } 298 299 int 300 adosfs_start(mp, flags, p) 301 struct mount *mp; 302 int flags; 303 struct proc *p; 304 { 305 306 return (0); 307 } 308 309 int 310 adosfs_unmount(mp, mntflags, p) 311 struct mount *mp; 312 int mntflags; 313 struct proc *p; 314 { 315 struct adosfsmount *amp; 316 int error, flags; 317 318 flags = 0; 319 if (mntflags & MNT_FORCE) 320 flags |= FORCECLOSE; 321 if ((error = vflush(mp, NULLVP, flags)) != 0) 322 return (error); 323 amp = VFSTOADOSFS(mp); 324 if (amp->devvp->v_type != VBAD) 325 amp->devvp->v_specmountpoint = NULL; 326 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 327 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, p); 328 vput(amp->devvp); 329 if (amp->bitmap) 330 free(amp->bitmap, M_ADOSFSBITMAP); 331 free(amp, M_ADOSFSMNT); 332 mp->mnt_data = NULL; 333 mp->mnt_flag &= ~MNT_LOCAL; 334 return (error); 335 } 336 337 int 338 adosfs_root(mp, vpp) 339 struct mount *mp; 340 struct vnode **vpp; 341 { 342 struct vnode *nvp; 343 int error; 344 345 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 346 return (error); 347 /* XXX verify it's a root block? */ 348 *vpp = nvp; 349 return (0); 350 } 351 352 int 353 adosfs_statvfs(mp, sbp, p) 354 struct mount *mp; 355 struct statvfs *sbp; 356 struct proc *p; 357 { 358 struct adosfsmount *amp; 359 360 amp = VFSTOADOSFS(mp); 361 sbp->f_bsize = amp->bsize; 362 sbp->f_frsize = amp->bsize; 363 sbp->f_iosize = amp->dbsize; 364 sbp->f_blocks = amp->numblks; 365 sbp->f_bfree = amp->freeblks; 366 sbp->f_bavail = amp->freeblks; 367 sbp->f_bresvd = 0; 368 sbp->f_files = 0; /* who knows */ 369 sbp->f_ffree = 0; /* " " */ 370 sbp->f_favail = 0; /* " " */ 371 sbp->f_fresvd = 0; 372 copy_statvfs_info(sbp, mp); 373 return (0); 374 } 375 376 /* 377 * lookup an anode, check mount's hash table if not found, create 378 * return locked and referenced al la vget(vp, 1); 379 */ 380 int 381 adosfs_vget(mp, an, vpp) 382 struct mount *mp; 383 ino_t an; 384 struct vnode **vpp; 385 { 386 struct adosfsmount *amp; 387 struct vnode *vp; 388 struct anode *ap; 389 struct buf *bp; 390 char *nam, *tmp; 391 int namlen, error; 392 393 error = 0; 394 amp = VFSTOADOSFS(mp); 395 bp = NULL; 396 397 /* 398 * check hash table. we are done if found 399 */ 400 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 401 return (0); 402 403 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 404 if (error) 405 return (error); 406 407 /* 408 * setup, insert in hash, and lock before io. 409 */ 410 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 411 memset(ap, 0, sizeof(struct anode)); 412 ap->vp = vp; 413 ap->amp = amp; 414 ap->block = an; 415 ap->nwords = amp->nwords; 416 adosfs_ainshash(amp, ap); 417 418 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 419 amp->bsize, NOCRED, &bp)) != 0) { 420 brelse(bp); 421 vput(vp); 422 return (error); 423 } 424 425 /* 426 * get type and fill rest in based on that. 427 */ 428 switch (ap->type = adosfs_getblktype(amp, bp)) { 429 case AROOT: 430 vp->v_type = VDIR; 431 vp->v_flag |= VROOT; 432 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 433 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 434 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 435 ap->created.days = adoswordn(bp, ap->nwords - 7); 436 ap->created.mins = adoswordn(bp, ap->nwords - 6); 437 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 438 break; 439 case ALDIR: 440 case ADIR: 441 vp->v_type = VDIR; 442 break; 443 case ALFILE: 444 case AFILE: 445 vp->v_type = VREG; 446 ap->fsize = adoswordn(bp, ap->nwords - 47); 447 break; 448 case ASLINK: /* XXX soft link */ 449 vp->v_type = VLNK; 450 /* 451 * convert from BCPL string and 452 * from: "part:dir/file" to: "/part/dir/file" 453 */ 454 nam = bp->b_data + (6 * sizeof(long)); 455 namlen = strlen(nam); 456 tmp = nam; 457 while (*tmp && *tmp != ':') 458 tmp++; 459 if (*tmp == 0) { 460 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 461 memcpy(ap->slinkto, nam, namlen); 462 } else if (*nam == ':') { 463 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 464 memcpy(ap->slinkto, nam, namlen); 465 ap->slinkto[0] = '/'; 466 } else { 467 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 468 ap->slinkto[0] = '/'; 469 memcpy(&ap->slinkto[1], nam, namlen); 470 ap->slinkto[tmp - nam + 1] = '/'; 471 namlen++; 472 } 473 ap->slinkto[namlen] = 0; 474 ap->fsize = namlen; 475 break; 476 default: 477 brelse(bp); 478 vput(vp); 479 return (EINVAL); 480 } 481 482 /* 483 * Get appropriate data from this block; hard link needs 484 * to get other data from the "real" block. 485 */ 486 487 /* 488 * copy in name (from original block) 489 */ 490 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 491 namlen = *(u_char *)nam++; 492 if (namlen > 30) { 493 #ifdef DIAGNOSTIC 494 printf("adosfs: aget: name length too long blk %llu\n", 495 (unsigned long long)an); 496 #endif 497 brelse(bp); 498 vput(vp); 499 return (EINVAL); 500 } 501 memcpy(ap->name, nam, namlen); 502 ap->name[namlen] = 0; 503 504 /* 505 * if dir alloc hash table and copy it in 506 */ 507 if (vp->v_type == VDIR) { 508 int i; 509 510 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 511 ap->ntabent = ANODETABENT(ap); 512 ap->tabi = (int *)&ap->tab[ap->ntabent]; 513 memset(ap->tabi, 0, ANODETABSZ(ap)); 514 for (i = 0; i < ap->ntabent; i++) 515 ap->tab[i] = adoswordn(bp, i + 6); 516 } 517 518 /* 519 * misc. 520 */ 521 ap->pblock = adoswordn(bp, ap->nwords - 3); 522 ap->hashf = adoswordn(bp, ap->nwords - 4); 523 ap->linknext = adoswordn(bp, ap->nwords - 10); 524 ap->linkto = adoswordn(bp, ap->nwords - 11); 525 526 /* 527 * setup last indirect block cache. 528 */ 529 ap->lastlindblk = 0; 530 if (ap->type == AFILE) { 531 ap->lastindblk = ap->block; 532 if (adoswordn(bp, ap->nwords - 10)) 533 ap->linkto = ap->block; 534 } else if (ap->type == ALFILE) { 535 ap->lastindblk = ap->linkto; 536 brelse(bp); 537 bp = NULL; 538 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 539 amp->bsize, NOCRED, &bp); 540 if (error) { 541 brelse(bp); 542 vput(vp); 543 return (error); 544 } 545 ap->fsize = adoswordn(bp, ap->nwords - 47); 546 /* 547 * Should ap->block be set to the real file header block? 548 */ 549 ap->block = ap->linkto; 550 } 551 552 if (ap->type == AROOT) { 553 ap->adprot = 15; 554 ap->uid = amp->uid; 555 ap->gid = amp->gid; 556 } else { 557 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 558 /* 559 * ADOS directories do not have a `x' protection bit as 560 * it is known in VFS; this functionality is fulfilled 561 * by the ADOS `r' bit. 562 * 563 * To retain the ADOS behaviour, fake execute permissions 564 * in that case. 565 */ 566 if ((ap->type == ADIR || ap->type == ALDIR) && 567 (ap->adprot & 0x00000008) == 0) 568 ap->adprot &= ~0x00000002; 569 570 /* 571 * Get uid/gid from extensions in file header 572 * (really need to know if this is a muFS partition) 573 */ 574 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 575 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 576 if (ap->uid || ap->gid) { 577 if (ap->uid == 0xffff) 578 ap->uid = 0; 579 if (ap->gid == 0xffff) 580 ap->gid = 0; 581 ap->adprot |= 0x40000000; /* Kludge */ 582 } 583 else { 584 /* 585 * uid & gid extension don't exist, 586 * so use the mount-point uid/gid 587 */ 588 ap->uid = amp->uid; 589 ap->gid = amp->gid; 590 } 591 } 592 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 593 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 594 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 595 596 genfs_node_init(vp, &adosfs_genfsops); 597 *vpp = vp; 598 brelse(bp); 599 vp->v_size = ap->fsize; 600 return (0); 601 } 602 603 /* 604 * Load the bitmap into memory, and count the number of available 605 * blocks. 606 * The bitmap will be released if the filesystem is read-only; it's 607 * only needed to find the free space. 608 */ 609 int 610 adosfs_loadbitmap(amp) 611 struct adosfsmount *amp; 612 { 613 struct buf *bp, *mapbp; 614 u_long bn; 615 int blkix, endix, mapix; 616 int bmsize; 617 int error; 618 619 bp = mapbp = NULL; 620 bn = amp->rootb; 621 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 622 NOCRED, &bp)) != 0) { 623 brelse(bp); 624 return (error); 625 } 626 blkix = amp->nwords - 49; 627 endix = amp->nwords - 24; 628 mapix = 0; 629 bmsize = (amp->numblks + 31) / 32; 630 while (mapix < bmsize) { 631 int n; 632 u_long bits; 633 634 if (adoswordn(bp, blkix) == 0) 635 break; 636 if (mapbp != NULL) 637 brelse(mapbp); 638 if ((error = bread(amp->devvp, 639 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 640 NOCRED, &mapbp)) != 0) 641 break; 642 if (adoscksum(mapbp, amp->nwords)) { 643 #ifdef DIAGNOSTIC 644 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 645 adoswordn(bp, blkix)); 646 #endif 647 /* XXX Force read-only? Set free space 0? */ 648 break; 649 } 650 n = 1; 651 while (n < amp->nwords && mapix < bmsize) { 652 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 653 ++n; 654 if (mapix == bmsize && amp->numblks & 31) 655 bits &= ~(0xffffffff << (amp->numblks & 31)); 656 while (bits) { 657 if (bits & 1) 658 ++amp->freeblks; 659 bits >>= 1; 660 } 661 } 662 ++blkix; 663 if (mapix < bmsize && blkix == endix) { 664 bn = adoswordn(bp, blkix); 665 brelse(bp); 666 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 667 amp->bsize, NOCRED, &bp)) != 0) 668 break; 669 /* 670 * Why is there no checksum on these blocks? 671 */ 672 blkix = 0; 673 endix = amp->nwords - 1; 674 } 675 } 676 if (bp) 677 brelse(bp); 678 if (mapbp) 679 brelse(mapbp); 680 return (error); 681 } 682 683 684 /* 685 * File handle to vnode 686 * 687 * Have to be really careful about stale file handles: 688 * - check that the inode number is in range 689 * - call iget() to get the locked inode 690 * - check for an unallocated inode (i_mode == 0) 691 * - check that the generation number matches 692 */ 693 694 struct ifid { 695 ushort ifid_len; 696 ushort ifid_pad; 697 int ifid_ino; 698 long ifid_start; 699 }; 700 701 int 702 adosfs_fhtovp(mp, fhp, vpp) 703 struct mount *mp; 704 struct fid *fhp; 705 struct vnode **vpp; 706 { 707 struct ifid *ifhp = (struct ifid *)fhp; 708 #if 0 709 struct anode *ap; 710 #endif 711 struct vnode *nvp; 712 int error; 713 714 #ifdef ADOSFS_DIAGNOSTIC 715 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 716 #endif 717 718 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 719 *vpp = NULLVP; 720 return (error); 721 } 722 #if 0 723 ap = VTOA(nvp); 724 if (ap->inode.iso_mode == 0) { 725 vput(nvp); 726 *vpp = NULLVP; 727 return (ESTALE); 728 } 729 #endif 730 *vpp = nvp; 731 return(0); 732 } 733 734 int 735 adosfs_vptofh(vp, fhp) 736 struct vnode *vp; 737 struct fid *fhp; 738 { 739 struct anode *ap = VTOA(vp); 740 struct ifid *ifhp; 741 742 ifhp = (struct ifid *)fhp; 743 ifhp->ifid_len = sizeof(struct ifid); 744 745 ifhp->ifid_ino = ap->block; 746 ifhp->ifid_start = ap->block; 747 748 #ifdef ADOSFS_DIAGNOSTIC 749 printf("advptofh(%x, %x)\n", vp, fhp); 750 #endif 751 return(0); 752 } 753 754 int 755 adosfs_quotactl(mp, cmds, uid, arg, p) 756 struct mount *mp; 757 int cmds; 758 uid_t uid; 759 void *arg; 760 struct proc *p; 761 { 762 return(EOPNOTSUPP); 763 } 764 765 int 766 adosfs_sync(mp, waitfor, uc, p) 767 struct mount *mp; 768 int waitfor; 769 struct ucred *uc; 770 struct proc *p; 771 { 772 #ifdef ADOSFS_DIAGNOSTIC 773 printf("ad_sync(%x, %x)\n", mp, waitfor); 774 #endif 775 return(0); 776 } 777 778 void 779 adosfs_init() 780 { 781 #ifdef _LKM 782 malloc_type_attach(M_ADOSFSMNT); 783 malloc_type_attach(M_ANODE); 784 malloc_type_attach(M_ADOSFSBITMAP); 785 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 786 &pool_allocator_nointr); 787 #endif 788 simple_lock_init(&adosfs_hashlock); 789 } 790 791 void 792 adosfs_done() 793 { 794 #ifdef _LKM 795 pool_destroy(&adosfs_node_pool); 796 malloc_type_detach(M_ADOSFSBITMAP); 797 malloc_type_detach(M_ANODE); 798 malloc_type_detach(M_ADOSFSMNT); 799 #endif 800 } 801 802 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 803 { 804 805 sysctl_createv(clog, 0, NULL, NULL, 806 CTLFLAG_PERMANENT, 807 CTLTYPE_NODE, "vfs", NULL, 808 NULL, 0, NULL, 0, 809 CTL_VFS, CTL_EOL); 810 sysctl_createv(clog, 0, NULL, NULL, 811 CTLFLAG_PERMANENT, 812 CTLTYPE_NODE, "adosfs", 813 SYSCTL_DESCR("AmigaDOS file system"), 814 NULL, 0, NULL, 0, 815 CTL_VFS, 16, CTL_EOL); 816 /* 817 * XXX the "16" above could be dynamic, thereby eliminating 818 * one more instance of the "number to vfs" mapping problem, 819 * but "16" is the order as taken from sys/mount.h 820 */ 821 } 822 823 /* 824 * vfs generic function call table 825 */ 826 827 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 828 829 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 830 &adosfs_vnodeop_opv_desc, 831 NULL, 832 }; 833 834 struct vfsops adosfs_vfsops = { 835 MOUNT_ADOSFS, 836 adosfs_mount, 837 adosfs_start, 838 adosfs_unmount, 839 adosfs_root, 840 adosfs_quotactl, 841 adosfs_statvfs, 842 adosfs_sync, 843 adosfs_vget, 844 adosfs_fhtovp, 845 adosfs_vptofh, 846 adosfs_init, 847 NULL, 848 adosfs_done, 849 NULL, /* vfs_mountroot */ 850 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 851 vfs_stdextattrctl, 852 adosfs_vnodeopv_descs, 853 }; 854 VFS_ATTACH(adosfs_vfsops); 855
Indexes created Fri Sep 26 08:10:20 GMT 2025