1 /* $NetBSD: advfsops.c,v 1.70 2014/04/16 18:55:18 maxv 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 1.70 2014/04/16 18:55:18 maxv 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 <sys/disk.h> 52 #include <miscfs/genfs/genfs.h> 53 #include <miscfs/specfs/specdev.h> /* XXX */ 54 #include <sys/fcntl.h> 55 #include <sys/namei.h> 56 #include <sys/ioctl.h> 57 #include <sys/queue.h> 58 #include <sys/buf.h> 59 #include <sys/conf.h> 60 #include <sys/kauth.h> 61 #include <sys/module.h> 62 #include <fs/adosfs/adosfs.h> 63 64 MODULE(MODULE_CLASS_VFS, adosfs, NULL); 65 66 VFS_PROTOS(adosfs); 67 68 static struct sysctllog *adosfs_sysctl_log; 69 70 int adosfs_mountfs(struct vnode *, struct mount *, struct lwp *); 71 int adosfs_loadbitmap(struct adosfsmount *); 72 73 kmutex_t adosfs_hashlock; 74 75 struct pool adosfs_node_pool; 76 77 MALLOC_JUSTDEFINE(M_ANODE, "adosfs anode","adosfs anode structures and tables"); 78 79 static const struct genfs_ops adosfs_genfsops = { 80 .gop_size = genfs_size, 81 }; 82 83 int (**adosfs_vnodeop_p)(void *); 84 85 int 86 adosfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 87 { 88 struct lwp *l = curlwp; 89 struct vnode *devvp; 90 struct adosfs_args *args = data; 91 struct adosfsmount *amp; 92 int error; 93 mode_t accessmode; 94 95 if (args == NULL) 96 return EINVAL; 97 if (*data_len < sizeof *args) 98 return EINVAL; 99 100 if (mp->mnt_flag & MNT_GETARGS) { 101 amp = VFSTOADOSFS(mp); 102 if (amp == NULL) 103 return EIO; 104 args->uid = amp->uid; 105 args->gid = amp->gid; 106 args->mask = amp->mask; 107 args->fspec = NULL; 108 *data_len = sizeof *args; 109 return 0; 110 } 111 112 if ((mp->mnt_flag & MNT_RDONLY) == 0) 113 return (EROFS); 114 115 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 116 return EOPNOTSUPP; 117 118 /* 119 * Not an update, or updating the name: look up the name 120 * and verify that it refers to a sensible block device. 121 */ 122 error = namei_simple_user(args->fspec, 123 NSM_FOLLOW_NOEMULROOT, &devvp); 124 if (error != 0) 125 return (error); 126 127 if (devvp->v_type != VBLK) { 128 vrele(devvp); 129 return (ENOTBLK); 130 } 131 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 132 vrele(devvp); 133 return (ENXIO); 134 } 135 /* 136 * If mount by non-root, then verify that user has necessary 137 * permissions on the device. 138 */ 139 accessmode = VREAD; 140 if ((mp->mnt_flag & MNT_RDONLY) == 0) 141 accessmode |= VWRITE; 142 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 143 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 144 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 145 VOP_UNLOCK(devvp); 146 if (error) { 147 vrele(devvp); 148 return (error); 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(struct vnode *devvp, struct mount *mp, struct lwp *l) 165 { 166 struct disklabel dl; 167 struct partition *parp; 168 struct adosfsmount *amp; 169 struct buf *bp; 170 struct vnode *rvp; 171 size_t bitmap_sz = 0; 172 int error, i; 173 uint64_t numsecs; 174 unsigned secsize; 175 unsigned long secsperblk, blksperdisk, resvblks; 176 177 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 boot and root block 184 */ 185 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 186 if ((error = VOP_OPEN(devvp, FREAD, NOCRED)) != 0) { 187 VOP_UNLOCK(devvp); 188 return (error); 189 } 190 191 error = getdisksize(devvp, &numsecs, &secsize); 192 if (error) 193 goto fail; 194 195 amp = kmem_zalloc(sizeof(struct adosfsmount), KM_SLEEP); 196 197 /* 198 * compute filesystem parameters from disklabel 199 * on arch/amiga the disklabel is computed from the native 200 * partition tables 201 * - p_fsize is the filesystem block size 202 * - p_frag is the number of sectors per filesystem block 203 * - p_cpg is the number of reserved blocks (boot blocks) 204 * - p_psize is reduced by the number of preallocated blocks 205 * at the end of a partition 206 * 207 * XXX 208 * - bsize and secsperblk could be computed from the first sector 209 * of the root block 210 * - resvblks (the number of boot blocks) can only be guessed 211 * by scanning for the root block as its position moves 212 * with resvblks 213 */ 214 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED); 215 VOP_UNLOCK(devvp); 216 if (error) 217 goto fail; 218 parp = &dl.d_partitions[DISKPART(devvp->v_rdev)]; 219 if (dl.d_type == DTYPE_FLOPPY) { 220 amp->bsize = secsize; 221 secsperblk = 1; 222 resvblks = 2; 223 } else if (parp->p_fsize > 0 && parp->p_frag > 0) { 224 amp->bsize = parp->p_fsize * parp->p_frag; 225 secsperblk = parp->p_frag; 226 resvblks = parp->p_cpg; 227 } else { 228 error = EINVAL; 229 goto fail; 230 } 231 blksperdisk = numsecs / secsperblk; 232 233 234 /* The filesytem variant ('dostype') is stored in the boot block */ 235 bp = NULL; 236 if ((error = bread(devvp, (daddr_t)BBOFF, 237 amp->bsize, NOCRED, 0, &bp)) != 0) { 238 goto fail; 239 } 240 amp->dostype = adoswordn(bp, 0); 241 brelse(bp, 0); 242 243 /* basic sanity checks */ 244 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 245 error = EINVAL; 246 goto fail; 247 } 248 249 amp->rootb = (blksperdisk - 1 + resvblks) / 2; 250 amp->numblks = blksperdisk - resvblks; 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 amp->mp = mp; 257 mp->mnt_data = amp; 258 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 259 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 260 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 261 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 262 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 263 mp->mnt_dev_bshift = DEV_BSHIFT; 264 mp->mnt_flag |= MNT_LOCAL; 265 266 /* 267 * init anode table. 268 */ 269 for (i = 0; i < ANODEHASHSZ; i++) 270 LIST_INIT(&->anodetab[i]); 271 272 /* 273 * get the root anode, if not a valid fs this will fail. 274 */ 275 if ((error = VFS_ROOT(mp, &rvp)) != 0) 276 goto fail; 277 /* allocate and load bitmap, set free space */ 278 bitmap_sz = ((amp->numblks + 31) / 32) * sizeof(*amp->bitmap); 279 amp->bitmap = kmem_alloc(bitmap_sz, KM_SLEEP); 280 if (amp->bitmap) 281 adosfs_loadbitmap(amp); 282 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 283 /* 284 * Don't need the bitmap any more if it's read-only. 285 */ 286 kmem_free(amp->bitmap, bitmap_sz); 287 amp->bitmap = NULL; 288 } 289 vput(rvp); 290 291 return(0); 292 293 fail: 294 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 295 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 296 VOP_UNLOCK(devvp); 297 if (amp && amp->bitmap) 298 kmem_free(amp->bitmap, bitmap_sz); 299 if (amp) 300 kmem_free(amp, sizeof(*amp)); 301 return (error); 302 } 303 304 int 305 adosfs_start(struct mount *mp, int flags) 306 { 307 308 return (0); 309 } 310 311 int 312 adosfs_unmount(struct mount *mp, int mntflags) 313 { 314 struct adosfsmount *amp; 315 int error, flags; 316 317 flags = 0; 318 if (mntflags & MNT_FORCE) 319 flags |= FORCECLOSE; 320 if ((error = vflush(mp, NULLVP, flags)) != 0) 321 return (error); 322 amp = VFSTOADOSFS(mp); 323 if (amp->devvp->v_type != VBAD) 324 spec_node_setmountedfs(amp->devvp, NULL); 325 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 326 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 327 vput(amp->devvp); 328 if (amp->bitmap) { 329 size_t bitmap_sz = ((amp->numblks + 31) / 32) * 330 sizeof(*amp->bitmap); 331 kmem_free(amp->bitmap, bitmap_sz); 332 } 333 kmem_free(amp, sizeof(*amp)); 334 mp->mnt_data = NULL; 335 mp->mnt_flag &= ~MNT_LOCAL; 336 return (error); 337 } 338 339 int 340 adosfs_root(struct mount *mp, 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(struct mount *mp, struct statvfs *sbp) 354 { 355 struct adosfsmount *amp; 356 357 amp = VFSTOADOSFS(mp); 358 sbp->f_bsize = amp->bsize; 359 sbp->f_frsize = amp->bsize; 360 sbp->f_iosize = amp->dbsize; 361 sbp->f_blocks = amp->numblks; 362 sbp->f_bfree = amp->freeblks; 363 sbp->f_bavail = amp->freeblks; 364 sbp->f_bresvd = 0; 365 sbp->f_files = 0; /* who knows */ 366 sbp->f_ffree = 0; /* " " */ 367 sbp->f_favail = 0; /* " " */ 368 sbp->f_fresvd = 0; 369 copy_statvfs_info(sbp, mp); 370 return (0); 371 } 372 373 /* 374 * lookup an anode, check mount's hash table if not found, create 375 * return locked and referenced al la vget(vp, 1); 376 */ 377 int 378 adosfs_vget(struct mount *mp, ino_t an, struct vnode **vpp) 379 { 380 struct adosfsmount *amp; 381 struct vnode *vp; 382 struct anode *ap; 383 struct buf *bp; 384 char *nam, *tmp; 385 int namlen, error; 386 387 error = 0; 388 amp = VFSTOADOSFS(mp); 389 bp = NULL; 390 391 /* 392 * check hash table. we are done if found 393 */ 394 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 395 return (0); 396 397 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, NULL, &vp); 398 if (error) 399 return (error); 400 401 /* 402 * setup, insert in hash, and lock before io. 403 */ 404 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 405 memset(ap, 0, sizeof(struct anode)); 406 ap->vp = vp; 407 ap->amp = amp; 408 ap->block = an; 409 ap->nwords = amp->nwords; 410 genfs_node_init(vp, &adosfs_genfsops); 411 adosfs_ainshash(amp, ap); 412 413 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 414 amp->bsize, NOCRED, 0, &bp)) != 0) { 415 vput(vp); 416 return (error); 417 } 418 419 /* 420 * get type and fill rest in based on that. 421 */ 422 switch (ap->type = adosfs_getblktype(amp, bp)) { 423 case AROOT: 424 vp->v_type = VDIR; 425 vp->v_vflag |= VV_ROOT; 426 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 427 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 428 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 429 ap->created.days = adoswordn(bp, ap->nwords - 7); 430 ap->created.mins = adoswordn(bp, ap->nwords - 6); 431 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 432 break; 433 case ALDIR: 434 case ADIR: 435 vp->v_type = VDIR; 436 break; 437 case ALFILE: 438 case AFILE: 439 vp->v_type = VREG; 440 ap->fsize = adoswordn(bp, ap->nwords - 47); 441 break; 442 case ASLINK: /* XXX soft link */ 443 vp->v_type = VLNK; 444 /* 445 * convert from BCPL string and 446 * from: "part:dir/file" to: "/part/dir/file" 447 */ 448 nam = (char *)bp->b_data + (6 * sizeof(long)); 449 namlen = strlen(nam); 450 tmp = nam; 451 while (*tmp && *tmp != ':') 452 tmp++; 453 if (*tmp == 0) { 454 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 455 memcpy(ap->slinkto, nam, namlen); 456 } else if (*nam == ':') { 457 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 458 memcpy(ap->slinkto, nam, namlen); 459 ap->slinkto[0] = '/'; 460 } else { 461 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 462 ap->slinkto[0] = '/'; 463 memcpy(&ap->slinkto[1], nam, namlen); 464 ap->slinkto[tmp - nam + 1] = '/'; 465 namlen++; 466 } 467 ap->slinkto[namlen] = 0; 468 ap->fsize = namlen; 469 break; 470 default: 471 brelse(bp, 0); 472 vput(vp); 473 return (EINVAL); 474 } 475 476 /* 477 * Get appropriate data from this block; hard link needs 478 * to get other data from the "real" block. 479 */ 480 481 /* 482 * copy in name (from original block) 483 */ 484 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 485 namlen = *(u_char *)nam++; 486 if (namlen > 30) { 487 #ifdef DIAGNOSTIC 488 printf("adosfs: aget: name length too long blk %llu\n", 489 (unsigned long long)an); 490 #endif 491 brelse(bp, 0); 492 vput(vp); 493 return (EINVAL); 494 } 495 memcpy(ap->name, nam, namlen); 496 ap->name[namlen] = 0; 497 498 /* 499 * if dir alloc hash table and copy it in 500 */ 501 if (vp->v_type == VDIR) { 502 int i; 503 504 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 505 ap->ntabent = ANODETABENT(ap); 506 ap->tabi = (int *)&ap->tab[ap->ntabent]; 507 memset(ap->tabi, 0, ANODETABSZ(ap)); 508 for (i = 0; i < ap->ntabent; i++) 509 ap->tab[i] = adoswordn(bp, i + 6); 510 } 511 512 /* 513 * misc. 514 */ 515 ap->pblock = adoswordn(bp, ap->nwords - 3); 516 ap->hashf = adoswordn(bp, ap->nwords - 4); 517 ap->linknext = adoswordn(bp, ap->nwords - 10); 518 ap->linkto = adoswordn(bp, ap->nwords - 11); 519 520 /* 521 * setup last indirect block cache. 522 */ 523 ap->lastlindblk = 0; 524 if (ap->type == AFILE) { 525 ap->lastindblk = ap->block; 526 if (adoswordn(bp, ap->nwords - 10)) 527 ap->linkto = ap->block; 528 } else if (ap->type == ALFILE) { 529 ap->lastindblk = ap->linkto; 530 brelse(bp, 0); 531 bp = NULL; 532 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 533 amp->bsize, NOCRED, 0, &bp); 534 if (error) { 535 vput(vp); 536 return (error); 537 } 538 ap->fsize = adoswordn(bp, ap->nwords - 47); 539 /* 540 * Should ap->block be set to the real file header block? 541 */ 542 ap->block = ap->linkto; 543 } 544 545 if (ap->type == AROOT) { 546 ap->adprot = 15; 547 ap->uid = amp->uid; 548 ap->gid = amp->gid; 549 } else { 550 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 551 /* 552 * ADOS directories do not have a `x' protection bit as 553 * it is known in VFS; this functionality is fulfilled 554 * by the ADOS `r' bit. 555 * 556 * To retain the ADOS behaviour, fake execute permissions 557 * in that case. 558 */ 559 if ((ap->type == ADIR || ap->type == ALDIR) && 560 (ap->adprot & 0x00000008) == 0) 561 ap->adprot &= ~0x00000002; 562 563 /* 564 * Get uid/gid from extensions in file header 565 * (really need to know if this is a muFS partition) 566 */ 567 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 568 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 569 if (ap->uid || ap->gid) { 570 if (ap->uid == 0xffff) 571 ap->uid = 0; 572 if (ap->gid == 0xffff) 573 ap->gid = 0; 574 ap->adprot |= 0x40000000; /* Kludge */ 575 } 576 else { 577 /* 578 * uid & gid extension don't exist, 579 * so use the mount-point uid/gid 580 */ 581 ap->uid = amp->uid; 582 ap->gid = amp->gid; 583 } 584 } 585 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 586 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 587 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 588 589 *vpp = vp; 590 brelse(bp, 0); 591 uvm_vnp_setsize(vp, ap->fsize); 592 return (0); 593 } 594 595 /* 596 * Load the bitmap into memory, and count the number of available 597 * blocks. 598 * The bitmap will be released if the filesystem is read-only; it's 599 * only needed to find the free space. 600 */ 601 int 602 adosfs_loadbitmap(struct adosfsmount *amp) 603 { 604 struct buf *bp, *mapbp; 605 u_long bn; 606 int blkix, endix, mapix; 607 int bmsize; 608 int error; 609 610 bp = mapbp = NULL; 611 bn = amp->rootb; 612 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 613 NOCRED, 0, &bp)) != 0) { 614 return (error); 615 } 616 blkix = amp->nwords - 49; 617 endix = amp->nwords - 24; 618 mapix = 0; 619 bmsize = (amp->numblks + 31) / 32; 620 while (mapix < bmsize) { 621 int n; 622 u_long bits; 623 624 if (adoswordn(bp, blkix) == 0) 625 break; 626 if (mapbp != NULL) 627 brelse(mapbp, 0); 628 if ((error = bread(amp->devvp, 629 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 630 NOCRED, 0, &mapbp)) != 0) 631 break; 632 if (adoscksum(mapbp, amp->nwords)) { 633 #ifdef DIAGNOSTIC 634 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 635 adoswordn(bp, blkix)); 636 #endif 637 /* XXX Force read-only? Set free space 0? */ 638 break; 639 } 640 n = 1; 641 while (n < amp->nwords && mapix < bmsize) { 642 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 643 ++n; 644 if (mapix == bmsize && amp->numblks & 31) 645 bits &= ~(0xffffffff << (amp->numblks & 31)); 646 while (bits) { 647 if (bits & 1) 648 ++amp->freeblks; 649 bits >>= 1; 650 } 651 } 652 ++blkix; 653 if (mapix < bmsize && blkix == endix) { 654 bn = adoswordn(bp, blkix); 655 brelse(bp, 0); 656 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 657 amp->bsize, NOCRED, 0, &bp)) != 0) 658 break; 659 /* 660 * Why is there no checksum on these blocks? 661 */ 662 blkix = 0; 663 endix = amp->nwords - 1; 664 } 665 } 666 if (bp) 667 brelse(bp, 0); 668 if (mapbp) 669 brelse(mapbp, 0); 670 return (error); 671 } 672 673 674 /* 675 * File handle to vnode 676 * 677 * Have to be really careful about stale file handles: 678 * - check that the inode number is in range 679 * - call iget() to get the locked inode 680 * - check for an unallocated inode (i_mode == 0) 681 * - check that the generation number matches 682 */ 683 684 struct ifid { 685 ushort ifid_len; 686 ushort ifid_pad; 687 int ifid_ino; 688 long ifid_start; 689 }; 690 691 int 692 adosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 693 { 694 struct ifid ifh; 695 #if 0 696 struct anode *ap; 697 #endif 698 struct vnode *nvp; 699 int error; 700 701 if (fhp->fid_len != sizeof(struct ifid)) 702 return EINVAL; 703 704 #ifdef ADOSFS_DIAGNOSTIC 705 printf("adfhtovp(%p, %p, %p)\n", mp, fhp, vpp); 706 #endif 707 708 memcpy(&ifh, fhp, sizeof(ifh)); 709 710 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 711 *vpp = NULLVP; 712 return (error); 713 } 714 #if 0 715 ap = VTOA(nvp); 716 if (ap->inode.iso_mode == 0) { 717 vput(nvp); 718 *vpp = NULLVP; 719 return (ESTALE); 720 } 721 #endif 722 *vpp = nvp; 723 return(0); 724 } 725 726 int 727 adosfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 728 { 729 struct anode *ap = VTOA(vp); 730 struct ifid ifh; 731 732 if (*fh_size < sizeof(struct ifid)) { 733 *fh_size = sizeof(struct ifid); 734 return E2BIG; 735 } 736 *fh_size = sizeof(struct ifid); 737 738 memset(&ifh, 0, sizeof(ifh)); 739 ifh.ifid_len = sizeof(struct ifid); 740 ifh.ifid_ino = ap->block; 741 ifh.ifid_start = ap->block; 742 memcpy(fhp, &ifh, sizeof(ifh)); 743 744 #ifdef ADOSFS_DIAGNOSTIC 745 printf("advptofh(%p, %p)\n", vp, fhp); 746 #endif 747 return(0); 748 } 749 750 int 751 adosfs_sync(struct mount *mp, int waitfor, kauth_cred_t uc) 752 { 753 #ifdef ADOSFS_DIAGNOSTIC 754 printf("ad_sync(%p, %d)\n", mp, waitfor); 755 #endif 756 return(0); 757 } 758 759 void 760 adosfs_init(void) 761 { 762 763 malloc_type_attach(M_ANODE); 764 mutex_init(&adosfs_hashlock, MUTEX_DEFAULT, IPL_NONE); 765 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 766 &pool_allocator_nointr, IPL_NONE); 767 } 768 769 void 770 adosfs_done(void) 771 { 772 773 pool_destroy(&adosfs_node_pool); 774 mutex_destroy(&adosfs_hashlock); 775 malloc_type_detach(M_ANODE); 776 } 777 778 /* 779 * vfs generic function call table 780 */ 781 782 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 783 784 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 785 &adosfs_vnodeop_opv_desc, 786 NULL, 787 }; 788 789 struct vfsops adosfs_vfsops = { 790 .vfs_name = MOUNT_ADOSFS, 791 .vfs_min_mount_data = sizeof (struct adosfs_args), 792 .vfs_mount = adosfs_mount, 793 .vfs_start = adosfs_start, 794 .vfs_unmount = adosfs_unmount, 795 .vfs_root = adosfs_root, 796 .vfs_quotactl = (void *)eopnotsupp, 797 .vfs_statvfs = adosfs_statvfs, 798 .vfs_sync = adosfs_sync, 799 .vfs_vget = adosfs_vget, 800 .vfs_fhtovp = adosfs_fhtovp, 801 .vfs_vptofh = adosfs_vptofh, 802 .vfs_init = adosfs_init, 803 .vfs_done = adosfs_done, 804 .vfs_snapshot = (void *)eopnotsupp, 805 .vfs_extattrctl = vfs_stdextattrctl, 806 .vfs_suspendctl = (void *)eopnotsupp, 807 .vfs_renamelock_enter = genfs_renamelock_enter, 808 .vfs_renamelock_exit = genfs_renamelock_exit, 809 .vfs_fsync = (void *)eopnotsupp, 810 .vfs_opv_descs = adosfs_vnodeopv_descs 811 }; 812 813 static int 814 adosfs_modcmd(modcmd_t cmd, void *arg) 815 { 816 int error; 817 818 switch (cmd) { 819 case MODULE_CMD_INIT: 820 error = vfs_attach(&adosfs_vfsops); 821 if (error != 0) 822 break; 823 sysctl_createv(&adosfs_sysctl_log, 0, NULL, NULL, 824 CTLFLAG_PERMANENT, 825 CTLTYPE_NODE, "adosfs", 826 SYSCTL_DESCR("AmigaDOS file system"), 827 NULL, 0, NULL, 0, 828 CTL_VFS, 16, CTL_EOL); 829 /* 830 * XXX the "16" above could be dynamic, thereby eliminating 831 * one more instance of the "number to vfs" mapping problem, 832 * but "16" is the order as taken from sys/mount.h 833 */ 834 break; 835 case MODULE_CMD_FINI: 836 error = vfs_detach(&adosfs_vfsops); 837 if (error != 0) 838 break; 839 sysctl_teardown(&adosfs_sysctl_log); 840 break; 841 default: 842 error = ENOTTY; 843 break; 844 } 845 846 return (error); 847 } 848