advfsops.c revision 1.47
1 /* $NetBSD: advfsops.c,v 1.47 2008/01/24 17:32:52 ad 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 1.47 2008/01/24 17:32:52 ad 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 <sys/simplelock.h> 60 #include <fs/adosfs/adosfs.h> 61 62 VFS_PROTOS(adosfs); 63 64 int adosfs_mountfs __P((struct vnode *, struct mount *, struct lwp *)); 65 int adosfs_loadbitmap __P((struct adosfsmount *)); 66 67 struct simplelock adosfs_hashlock; 68 69 struct pool adosfs_node_pool; 70 71 MALLOC_JUSTDEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 72 MALLOC_JUSTDEFINE(M_ANODE, "adosfs anode","adosfs anode structures and tables"); 73 MALLOC_JUSTDEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 74 75 static const struct genfs_ops adosfs_genfsops = { 76 .gop_size = genfs_size, 77 }; 78 79 int (**adosfs_vnodeop_p) __P((void *)); 80 81 int 82 adosfs_mount(mp, path, data, data_len) 83 struct mount *mp; 84 const char *path; 85 void *data; 86 size_t *data_len; 87 { 88 struct lwp *l = curlwp; 89 struct nameidata nd; 90 struct vnode *devvp; 91 struct adosfs_args *args = data; 92 struct adosfsmount *amp; 93 int error; 94 mode_t accessmode; 95 96 if (*data_len < sizeof *args) 97 return EINVAL; 98 99 if (mp->mnt_flag & MNT_GETARGS) { 100 amp = VFSTOADOSFS(mp); 101 if (amp == NULL) 102 return EIO; 103 args->uid = amp->uid; 104 args->gid = amp->gid; 105 args->mask = amp->mask; 106 args->fspec = NULL; 107 *data_len = sizeof *args; 108 return 0; 109 } 110 111 if ((mp->mnt_flag & MNT_RDONLY) == 0) 112 return (EROFS); 113 114 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 115 return EOPNOTSUPP; 116 117 /* 118 * Not an update, or updating the name: look up the name 119 * and verify that it refers to a sensible block device. 120 */ 121 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 122 if ((error = namei(&nd)) != 0) 123 return (error); 124 devvp = nd.ni_vp; 125 126 if (devvp->v_type != VBLK) { 127 vrele(devvp); 128 return (ENOTBLK); 129 } 130 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 131 vrele(devvp); 132 return (ENXIO); 133 } 134 /* 135 * If mount by non-root, then verify that user has necessary 136 * permissions on the device. 137 */ 138 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 139 accessmode = VREAD; 140 if ((mp->mnt_flag & MNT_RDONLY) == 0) 141 accessmode |= VWRITE; 142 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 143 error = VOP_ACCESS(devvp, accessmode, l->l_cred); 144 if (error) { 145 vput(devvp); 146 return (error); 147 } 148 VOP_UNLOCK(devvp, 0); 149 } 150 /* MNT_UPDATE? */ 151 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 152 vrele(devvp); 153 return (error); 154 } 155 amp = VFSTOADOSFS(mp); 156 amp->uid = args->uid; 157 amp->gid = args->gid; 158 amp->mask = args->mask; 159 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 160 mp->mnt_op->vfs_name, mp, l); 161 } 162 163 int 164 adosfs_mountfs(devvp, mp, l) 165 struct vnode *devvp; 166 struct mount *mp; 167 struct lwp *l; 168 { 169 struct disklabel dl; 170 struct partition *parp; 171 struct adosfsmount *amp; 172 struct buf *bp; 173 struct vnode *rvp; 174 int error, part, i; 175 176 part = DISKPART(devvp->v_rdev); 177 amp = NULL; 178 179 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 180 return (error); 181 182 /* 183 * open blkdev and read root block 184 */ 185 if ((error = VOP_OPEN(devvp, FREAD, NOCRED)) != 0) 186 return (error); 187 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED); 188 if (error) 189 goto fail; 190 191 parp = &dl.d_partitions[part]; 192 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 193 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 194 amp->mp = mp; 195 if (dl.d_type == DTYPE_FLOPPY) { 196 amp->bsize = dl.d_secsize; 197 amp->secsperblk = 1; 198 } 199 else { 200 amp->bsize = parp->p_fsize * parp->p_frag; 201 amp->secsperblk = parp->p_frag; 202 } 203 204 /* invalid fs ? */ 205 if (amp->secsperblk == 0) { 206 error = EINVAL; 207 goto fail; 208 } 209 210 bp = NULL; 211 if ((error = bread(devvp, (daddr_t)BBOFF, 212 amp->bsize, NOCRED, &bp)) != 0) { 213 brelse(bp, 0); 214 goto fail; 215 } 216 amp->dostype = adoswordn(bp, 0); 217 brelse(bp, 0); 218 219 /* basic sanity checks */ 220 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 221 error = EINVAL; 222 goto fail; 223 } 224 225 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 226 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 227 228 amp->nwords = amp->bsize >> 2; 229 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 230 amp->devvp = devvp; 231 232 mp->mnt_data = amp; 233 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 234 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 235 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 236 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 237 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 238 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 239 mp->mnt_flag |= MNT_LOCAL; 240 241 /* 242 * init anode table. 243 */ 244 for (i = 0; i < ANODEHASHSZ; i++) 245 LIST_INIT(&->anodetab[i]); 246 247 /* 248 * get the root anode, if not a valid fs this will fail. 249 */ 250 if ((error = VFS_ROOT(mp, &rvp)) != 0) 251 goto fail; 252 /* allocate and load bitmap, set free space */ 253 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 254 M_ADOSFSBITMAP, M_WAITOK); 255 if (amp->bitmap) 256 adosfs_loadbitmap(amp); 257 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 258 /* 259 * Don't need the bitmap any more if it's read-only. 260 */ 261 free(amp->bitmap, M_ADOSFSBITMAP); 262 amp->bitmap = NULL; 263 } 264 vput(rvp); 265 266 return(0); 267 268 fail: 269 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 270 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 271 VOP_UNLOCK(devvp, 0); 272 if (amp && amp->bitmap) 273 free(amp->bitmap, M_ADOSFSBITMAP); 274 if (amp) 275 free(amp, M_ADOSFSMNT); 276 return (error); 277 } 278 279 int 280 adosfs_start(mp, flags) 281 struct mount *mp; 282 int flags; 283 { 284 285 return (0); 286 } 287 288 int 289 adosfs_unmount(mp, mntflags) 290 struct mount *mp; 291 int mntflags; 292 { 293 struct adosfsmount *amp; 294 int error, flags; 295 296 flags = 0; 297 if (mntflags & MNT_FORCE) 298 flags |= FORCECLOSE; 299 if ((error = vflush(mp, NULLVP, flags)) != 0) 300 return (error); 301 amp = VFSTOADOSFS(mp); 302 if (amp->devvp->v_type != VBAD) 303 amp->devvp->v_specmountpoint = NULL; 304 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 305 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 306 vput(amp->devvp); 307 if (amp->bitmap) 308 free(amp->bitmap, M_ADOSFSBITMAP); 309 free(amp, M_ADOSFSMNT); 310 mp->mnt_data = NULL; 311 mp->mnt_flag &= ~MNT_LOCAL; 312 return (error); 313 } 314 315 int 316 adosfs_root(mp, vpp) 317 struct mount *mp; 318 struct vnode **vpp; 319 { 320 struct vnode *nvp; 321 int error; 322 323 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 324 return (error); 325 /* XXX verify it's a root block? */ 326 *vpp = nvp; 327 return (0); 328 } 329 330 int 331 adosfs_statvfs(mp, sbp) 332 struct mount *mp; 333 struct statvfs *sbp; 334 { 335 struct adosfsmount *amp; 336 337 amp = VFSTOADOSFS(mp); 338 sbp->f_bsize = amp->bsize; 339 sbp->f_frsize = amp->bsize; 340 sbp->f_iosize = amp->dbsize; 341 sbp->f_blocks = amp->numblks; 342 sbp->f_bfree = amp->freeblks; 343 sbp->f_bavail = amp->freeblks; 344 sbp->f_bresvd = 0; 345 sbp->f_files = 0; /* who knows */ 346 sbp->f_ffree = 0; /* " " */ 347 sbp->f_favail = 0; /* " " */ 348 sbp->f_fresvd = 0; 349 copy_statvfs_info(sbp, mp); 350 return (0); 351 } 352 353 /* 354 * lookup an anode, check mount's hash table if not found, create 355 * return locked and referenced al la vget(vp, 1); 356 */ 357 int 358 adosfs_vget(mp, an, vpp) 359 struct mount *mp; 360 ino_t an; 361 struct vnode **vpp; 362 { 363 struct adosfsmount *amp; 364 struct vnode *vp; 365 struct anode *ap; 366 struct buf *bp; 367 char *nam, *tmp; 368 int namlen, error; 369 370 error = 0; 371 amp = VFSTOADOSFS(mp); 372 bp = NULL; 373 374 /* 375 * check hash table. we are done if found 376 */ 377 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 378 return (0); 379 380 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 381 if (error) 382 return (error); 383 384 /* 385 * setup, insert in hash, and lock before io. 386 */ 387 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 388 memset(ap, 0, sizeof(struct anode)); 389 ap->vp = vp; 390 ap->amp = amp; 391 ap->block = an; 392 ap->nwords = amp->nwords; 393 adosfs_ainshash(amp, ap); 394 395 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 396 amp->bsize, NOCRED, &bp)) != 0) { 397 brelse(bp, 0); 398 vput(vp); 399 return (error); 400 } 401 402 /* 403 * get type and fill rest in based on that. 404 */ 405 switch (ap->type = adosfs_getblktype(amp, bp)) { 406 case AROOT: 407 vp->v_type = VDIR; 408 vp->v_vflag |= VV_ROOT; 409 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 410 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 411 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 412 ap->created.days = adoswordn(bp, ap->nwords - 7); 413 ap->created.mins = adoswordn(bp, ap->nwords - 6); 414 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 415 break; 416 case ALDIR: 417 case ADIR: 418 vp->v_type = VDIR; 419 break; 420 case ALFILE: 421 case AFILE: 422 vp->v_type = VREG; 423 ap->fsize = adoswordn(bp, ap->nwords - 47); 424 break; 425 case ASLINK: /* XXX soft link */ 426 vp->v_type = VLNK; 427 /* 428 * convert from BCPL string and 429 * from: "part:dir/file" to: "/part/dir/file" 430 */ 431 nam = (char *)bp->b_data + (6 * sizeof(long)); 432 namlen = strlen(nam); 433 tmp = nam; 434 while (*tmp && *tmp != ':') 435 tmp++; 436 if (*tmp == 0) { 437 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 438 memcpy(ap->slinkto, nam, namlen); 439 } else if (*nam == ':') { 440 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 441 memcpy(ap->slinkto, nam, namlen); 442 ap->slinkto[0] = '/'; 443 } else { 444 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 445 ap->slinkto[0] = '/'; 446 memcpy(&ap->slinkto[1], nam, namlen); 447 ap->slinkto[tmp - nam + 1] = '/'; 448 namlen++; 449 } 450 ap->slinkto[namlen] = 0; 451 ap->fsize = namlen; 452 break; 453 default: 454 brelse(bp, 0); 455 vput(vp); 456 return (EINVAL); 457 } 458 459 /* 460 * Get appropriate data from this block; hard link needs 461 * to get other data from the "real" block. 462 */ 463 464 /* 465 * copy in name (from original block) 466 */ 467 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 468 namlen = *(u_char *)nam++; 469 if (namlen > 30) { 470 #ifdef DIAGNOSTIC 471 printf("adosfs: aget: name length too long blk %llu\n", 472 (unsigned long long)an); 473 #endif 474 brelse(bp, 0); 475 vput(vp); 476 return (EINVAL); 477 } 478 memcpy(ap->name, nam, namlen); 479 ap->name[namlen] = 0; 480 481 /* 482 * if dir alloc hash table and copy it in 483 */ 484 if (vp->v_type == VDIR) { 485 int i; 486 487 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 488 ap->ntabent = ANODETABENT(ap); 489 ap->tabi = (int *)&ap->tab[ap->ntabent]; 490 memset(ap->tabi, 0, ANODETABSZ(ap)); 491 for (i = 0; i < ap->ntabent; i++) 492 ap->tab[i] = adoswordn(bp, i + 6); 493 } 494 495 /* 496 * misc. 497 */ 498 ap->pblock = adoswordn(bp, ap->nwords - 3); 499 ap->hashf = adoswordn(bp, ap->nwords - 4); 500 ap->linknext = adoswordn(bp, ap->nwords - 10); 501 ap->linkto = adoswordn(bp, ap->nwords - 11); 502 503 /* 504 * setup last indirect block cache. 505 */ 506 ap->lastlindblk = 0; 507 if (ap->type == AFILE) { 508 ap->lastindblk = ap->block; 509 if (adoswordn(bp, ap->nwords - 10)) 510 ap->linkto = ap->block; 511 } else if (ap->type == ALFILE) { 512 ap->lastindblk = ap->linkto; 513 brelse(bp, 0); 514 bp = NULL; 515 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 516 amp->bsize, NOCRED, &bp); 517 if (error) { 518 brelse(bp, 0); 519 vput(vp); 520 return (error); 521 } 522 ap->fsize = adoswordn(bp, ap->nwords - 47); 523 /* 524 * Should ap->block be set to the real file header block? 525 */ 526 ap->block = ap->linkto; 527 } 528 529 if (ap->type == AROOT) { 530 ap->adprot = 15; 531 ap->uid = amp->uid; 532 ap->gid = amp->gid; 533 } else { 534 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 535 /* 536 * ADOS directories do not have a `x' protection bit as 537 * it is known in VFS; this functionality is fulfilled 538 * by the ADOS `r' bit. 539 * 540 * To retain the ADOS behaviour, fake execute permissions 541 * in that case. 542 */ 543 if ((ap->type == ADIR || ap->type == ALDIR) && 544 (ap->adprot & 0x00000008) == 0) 545 ap->adprot &= ~0x00000002; 546 547 /* 548 * Get uid/gid from extensions in file header 549 * (really need to know if this is a muFS partition) 550 */ 551 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 552 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 553 if (ap->uid || ap->gid) { 554 if (ap->uid == 0xffff) 555 ap->uid = 0; 556 if (ap->gid == 0xffff) 557 ap->gid = 0; 558 ap->adprot |= 0x40000000; /* Kludge */ 559 } 560 else { 561 /* 562 * uid & gid extension don't exist, 563 * so use the mount-point uid/gid 564 */ 565 ap->uid = amp->uid; 566 ap->gid = amp->gid; 567 } 568 } 569 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 570 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 571 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 572 573 genfs_node_init(vp, &adosfs_genfsops); 574 *vpp = vp; 575 brelse(bp, 0); 576 uvm_vnp_setsize(vp, ap->fsize); 577 return (0); 578 } 579 580 /* 581 * Load the bitmap into memory, and count the number of available 582 * blocks. 583 * The bitmap will be released if the filesystem is read-only; it's 584 * only needed to find the free space. 585 */ 586 int 587 adosfs_loadbitmap(amp) 588 struct adosfsmount *amp; 589 { 590 struct buf *bp, *mapbp; 591 u_long bn; 592 int blkix, endix, mapix; 593 int bmsize; 594 int error; 595 596 bp = mapbp = NULL; 597 bn = amp->rootb; 598 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 599 NOCRED, &bp)) != 0) { 600 brelse(bp, 0); 601 return (error); 602 } 603 blkix = amp->nwords - 49; 604 endix = amp->nwords - 24; 605 mapix = 0; 606 bmsize = (amp->numblks + 31) / 32; 607 while (mapix < bmsize) { 608 int n; 609 u_long bits; 610 611 if (adoswordn(bp, blkix) == 0) 612 break; 613 if (mapbp != NULL) 614 brelse(mapbp, 0); 615 if ((error = bread(amp->devvp, 616 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 617 NOCRED, &mapbp)) != 0) 618 break; 619 if (adoscksum(mapbp, amp->nwords)) { 620 #ifdef DIAGNOSTIC 621 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 622 adoswordn(bp, blkix)); 623 #endif 624 /* XXX Force read-only? Set free space 0? */ 625 break; 626 } 627 n = 1; 628 while (n < amp->nwords && mapix < bmsize) { 629 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 630 ++n; 631 if (mapix == bmsize && amp->numblks & 31) 632 bits &= ~(0xffffffff << (amp->numblks & 31)); 633 while (bits) { 634 if (bits & 1) 635 ++amp->freeblks; 636 bits >>= 1; 637 } 638 } 639 ++blkix; 640 if (mapix < bmsize && blkix == endix) { 641 bn = adoswordn(bp, blkix); 642 brelse(bp, 0); 643 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 644 amp->bsize, NOCRED, &bp)) != 0) 645 break; 646 /* 647 * Why is there no checksum on these blocks? 648 */ 649 blkix = 0; 650 endix = amp->nwords - 1; 651 } 652 } 653 if (bp) 654 brelse(bp, 0); 655 if (mapbp) 656 brelse(mapbp, 0); 657 return (error); 658 } 659 660 661 /* 662 * File handle to vnode 663 * 664 * Have to be really careful about stale file handles: 665 * - check that the inode number is in range 666 * - call iget() to get the locked inode 667 * - check for an unallocated inode (i_mode == 0) 668 * - check that the generation number matches 669 */ 670 671 struct ifid { 672 ushort ifid_len; 673 ushort ifid_pad; 674 int ifid_ino; 675 long ifid_start; 676 }; 677 678 int 679 adosfs_fhtovp(mp, fhp, vpp) 680 struct mount *mp; 681 struct fid *fhp; 682 struct vnode **vpp; 683 { 684 struct ifid ifh; 685 #if 0 686 struct anode *ap; 687 #endif 688 struct vnode *nvp; 689 int error; 690 691 if (fhp->fid_len != sizeof(struct ifid)) 692 return EINVAL; 693 694 #ifdef ADOSFS_DIAGNOSTIC 695 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 696 #endif 697 698 memcpy(&ifh, fhp, sizeof(ifh)); 699 700 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 701 *vpp = NULLVP; 702 return (error); 703 } 704 #if 0 705 ap = VTOA(nvp); 706 if (ap->inode.iso_mode == 0) { 707 vput(nvp); 708 *vpp = NULLVP; 709 return (ESTALE); 710 } 711 #endif 712 *vpp = nvp; 713 return(0); 714 } 715 716 int 717 adosfs_vptofh(vp, fhp, fh_size) 718 struct vnode *vp; 719 struct fid *fhp; 720 size_t *fh_size; 721 { 722 struct anode *ap = VTOA(vp); 723 struct ifid ifh; 724 725 if (*fh_size < sizeof(struct ifid)) { 726 *fh_size = sizeof(struct ifid); 727 return E2BIG; 728 } 729 *fh_size = sizeof(struct ifid); 730 731 memset(&ifh, 0, sizeof(ifh)); 732 ifh.ifid_len = sizeof(struct ifid); 733 ifh.ifid_ino = ap->block; 734 ifh.ifid_start = ap->block; 735 memcpy(fhp, &ifh, sizeof(ifh)); 736 737 #ifdef ADOSFS_DIAGNOSTIC 738 printf("advptofh(%x, %x)\n", vp, fhp); 739 #endif 740 return(0); 741 } 742 743 int 744 adosfs_sync(mp, waitfor, uc) 745 struct mount *mp; 746 int waitfor; 747 kauth_cred_t uc; 748 { 749 #ifdef ADOSFS_DIAGNOSTIC 750 printf("ad_sync(%x, %x)\n", mp, waitfor); 751 #endif 752 return(0); 753 } 754 755 void 756 adosfs_init() 757 { 758 759 malloc_type_attach(M_ADOSFSMNT); 760 malloc_type_attach(M_ANODE); 761 malloc_type_attach(M_ADOSFSBITMAP); 762 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 763 &pool_allocator_nointr, IPL_NONE); 764 simple_lock_init(&adosfs_hashlock); 765 } 766 767 void 768 adosfs_done() 769 { 770 771 pool_destroy(&adosfs_node_pool); 772 malloc_type_detach(M_ADOSFSBITMAP); 773 malloc_type_detach(M_ANODE); 774 malloc_type_detach(M_ADOSFSMNT); 775 } 776 777 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 778 { 779 780 sysctl_createv(clog, 0, NULL, NULL, 781 CTLFLAG_PERMANENT, 782 CTLTYPE_NODE, "vfs", NULL, 783 NULL, 0, NULL, 0, 784 CTL_VFS, CTL_EOL); 785 sysctl_createv(clog, 0, NULL, NULL, 786 CTLFLAG_PERMANENT, 787 CTLTYPE_NODE, "adosfs", 788 SYSCTL_DESCR("AmigaDOS file system"), 789 NULL, 0, NULL, 0, 790 CTL_VFS, 16, CTL_EOL); 791 /* 792 * XXX the "16" above could be dynamic, thereby eliminating 793 * one more instance of the "number to vfs" mapping problem, 794 * but "16" is the order as taken from sys/mount.h 795 */ 796 } 797 798 /* 799 * vfs generic function call table 800 */ 801 802 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 803 804 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 805 &adosfs_vnodeop_opv_desc, 806 NULL, 807 }; 808 809 struct vfsops adosfs_vfsops = { 810 MOUNT_ADOSFS, 811 sizeof (struct adosfs_args), 812 adosfs_mount, 813 adosfs_start, 814 adosfs_unmount, 815 adosfs_root, 816 (void *)eopnotsupp, /* vfs_quotactl */ 817 adosfs_statvfs, 818 adosfs_sync, 819 adosfs_vget, 820 adosfs_fhtovp, 821 adosfs_vptofh, 822 adosfs_init, 823 NULL, 824 adosfs_done, 825 NULL, /* vfs_mountroot */ 826 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 827 vfs_stdextattrctl, 828 (void *)eopnotsupp, /* vfs_suspendctl */ 829 adosfs_vnodeopv_descs, 830 0, 831 { NULL, NULL }, 832 }; 833 VFS_ATTACH(adosfs_vfsops); 834
Indexes created Fri Sep 26 20:09:58 GMT 2025