1 /* $NetBSD: advfsops.c,v 1.71 2014/08/05 08:50:54 hannken 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 1.71 2014/08/05 08:50:54 hannken 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 struct pool adosfs_node_pool; 74 75 MALLOC_JUSTDEFINE(M_ANODE, "adosfs anode","adosfs anode structures and tables"); 76 77 static const struct genfs_ops adosfs_genfsops = { 78 .gop_size = genfs_size, 79 }; 80 81 int (**adosfs_vnodeop_p)(void *); 82 83 int 84 adosfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 85 { 86 struct lwp *l = curlwp; 87 struct vnode *devvp; 88 struct adosfs_args *args = data; 89 struct adosfsmount *amp; 90 int error; 91 mode_t accessmode; 92 93 if (args == NULL) 94 return EINVAL; 95 if (*data_len < sizeof *args) 96 return EINVAL; 97 98 if (mp->mnt_flag & MNT_GETARGS) { 99 amp = VFSTOADOSFS(mp); 100 if (amp == NULL) 101 return EIO; 102 args->uid = amp->uid; 103 args->gid = amp->gid; 104 args->mask = amp->mask; 105 args->fspec = NULL; 106 *data_len = sizeof *args; 107 return 0; 108 } 109 110 if ((mp->mnt_flag & MNT_RDONLY) == 0) 111 return (EROFS); 112 113 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 114 return EOPNOTSUPP; 115 116 /* 117 * Not an update, or updating the name: look up the name 118 * and verify that it refers to a sensible block device. 119 */ 120 error = namei_simple_user(args->fspec, 121 NSM_FOLLOW_NOEMULROOT, &devvp); 122 if (error != 0) 123 return (error); 124 125 if (devvp->v_type != VBLK) { 126 vrele(devvp); 127 return (ENOTBLK); 128 } 129 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 130 vrele(devvp); 131 return (ENXIO); 132 } 133 /* 134 * If mount by non-root, then verify that user has necessary 135 * permissions on the device. 136 */ 137 accessmode = VREAD; 138 if ((mp->mnt_flag & MNT_RDONLY) == 0) 139 accessmode |= VWRITE; 140 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 141 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 142 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 143 VOP_UNLOCK(devvp); 144 if (error) { 145 vrele(devvp); 146 return (error); 147 } 148 /* MNT_UPDATE? */ 149 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 150 vrele(devvp); 151 return (error); 152 } 153 amp = VFSTOADOSFS(mp); 154 amp->uid = args->uid; 155 amp->gid = args->gid; 156 amp->mask = args->mask; 157 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 158 mp->mnt_op->vfs_name, mp, l); 159 } 160 161 int 162 adosfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 163 { 164 struct disklabel dl; 165 struct partition *parp; 166 struct adosfsmount *amp; 167 struct buf *bp; 168 struct vnode *rvp; 169 size_t bitmap_sz = 0; 170 int error; 171 uint64_t numsecs; 172 unsigned secsize; 173 unsigned long secsperblk, blksperdisk, resvblks; 174 175 amp = NULL; 176 177 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 178 return (error); 179 180 /* 181 * open blkdev and read boot and root block 182 */ 183 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 184 if ((error = VOP_OPEN(devvp, FREAD, NOCRED)) != 0) { 185 VOP_UNLOCK(devvp); 186 return (error); 187 } 188 189 error = getdisksize(devvp, &numsecs, &secsize); 190 if (error) 191 goto fail; 192 193 amp = kmem_zalloc(sizeof(struct adosfsmount), KM_SLEEP); 194 195 /* 196 * compute filesystem parameters from disklabel 197 * on arch/amiga the disklabel is computed from the native 198 * partition tables 199 * - p_fsize is the filesystem block size 200 * - p_frag is the number of sectors per filesystem block 201 * - p_cpg is the number of reserved blocks (boot blocks) 202 * - p_psize is reduced by the number of preallocated blocks 203 * at the end of a partition 204 * 205 * XXX 206 * - bsize and secsperblk could be computed from the first sector 207 * of the root block 208 * - resvblks (the number of boot blocks) can only be guessed 209 * by scanning for the root block as its position moves 210 * with resvblks 211 */ 212 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED); 213 VOP_UNLOCK(devvp); 214 if (error) 215 goto fail; 216 parp = &dl.d_partitions[DISKPART(devvp->v_rdev)]; 217 if (dl.d_type == DTYPE_FLOPPY) { 218 amp->bsize = secsize; 219 secsperblk = 1; 220 resvblks = 2; 221 } else if (parp->p_fsize > 0 && parp->p_frag > 0) { 222 amp->bsize = parp->p_fsize * parp->p_frag; 223 secsperblk = parp->p_frag; 224 resvblks = parp->p_cpg; 225 } else { 226 error = EINVAL; 227 goto fail; 228 } 229 blksperdisk = numsecs / secsperblk; 230 231 232 /* The filesytem variant ('dostype') is stored in the boot block */ 233 bp = NULL; 234 if ((error = bread(devvp, (daddr_t)BBOFF, 235 amp->bsize, NOCRED, 0, &bp)) != 0) { 236 goto fail; 237 } 238 amp->dostype = adoswordn(bp, 0); 239 brelse(bp, 0); 240 241 /* basic sanity checks */ 242 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 243 error = EINVAL; 244 goto fail; 245 } 246 247 amp->rootb = (blksperdisk - 1 + resvblks) / 2; 248 amp->numblks = blksperdisk - resvblks; 249 250 amp->nwords = amp->bsize >> 2; 251 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 252 amp->devvp = devvp; 253 254 amp->mp = mp; 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; 262 mp->mnt_flag |= MNT_LOCAL; 263 264 /* 265 * get the root anode, if not a valid fs this will fail. 266 */ 267 if ((error = VFS_ROOT(mp, &rvp)) != 0) 268 goto fail; 269 /* allocate and load bitmap, set free space */ 270 bitmap_sz = ((amp->numblks + 31) / 32) * sizeof(*amp->bitmap); 271 amp->bitmap = kmem_alloc(bitmap_sz, KM_SLEEP); 272 if (amp->bitmap) 273 adosfs_loadbitmap(amp); 274 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 275 /* 276 * Don't need the bitmap any more if it's read-only. 277 */ 278 kmem_free(amp->bitmap, bitmap_sz); 279 amp->bitmap = NULL; 280 } 281 vput(rvp); 282 283 return(0); 284 285 fail: 286 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 287 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 288 VOP_UNLOCK(devvp); 289 if (amp && amp->bitmap) 290 kmem_free(amp->bitmap, bitmap_sz); 291 if (amp) 292 kmem_free(amp, sizeof(*amp)); 293 return (error); 294 } 295 296 int 297 adosfs_start(struct mount *mp, int flags) 298 { 299 300 return (0); 301 } 302 303 int 304 adosfs_unmount(struct mount *mp, int mntflags) 305 { 306 struct adosfsmount *amp; 307 int error, flags; 308 309 flags = 0; 310 if (mntflags & MNT_FORCE) 311 flags |= FORCECLOSE; 312 if ((error = vflush(mp, NULLVP, flags)) != 0) 313 return (error); 314 amp = VFSTOADOSFS(mp); 315 if (amp->devvp->v_type != VBAD) 316 spec_node_setmountedfs(amp->devvp, NULL); 317 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 318 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 319 vput(amp->devvp); 320 if (amp->bitmap) { 321 size_t bitmap_sz = ((amp->numblks + 31) / 32) * 322 sizeof(*amp->bitmap); 323 kmem_free(amp->bitmap, bitmap_sz); 324 } 325 kmem_free(amp, sizeof(*amp)); 326 mp->mnt_data = NULL; 327 mp->mnt_flag &= ~MNT_LOCAL; 328 return (error); 329 } 330 331 int 332 adosfs_root(struct mount *mp, struct vnode **vpp) 333 { 334 struct vnode *nvp; 335 int error; 336 337 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 338 return (error); 339 /* XXX verify it's a root block? */ 340 *vpp = nvp; 341 return (0); 342 } 343 344 int 345 adosfs_statvfs(struct mount *mp, struct statvfs *sbp) 346 { 347 struct adosfsmount *amp; 348 349 amp = VFSTOADOSFS(mp); 350 sbp->f_bsize = amp->bsize; 351 sbp->f_frsize = amp->bsize; 352 sbp->f_iosize = amp->dbsize; 353 sbp->f_blocks = amp->numblks; 354 sbp->f_bfree = amp->freeblks; 355 sbp->f_bavail = amp->freeblks; 356 sbp->f_bresvd = 0; 357 sbp->f_files = 0; /* who knows */ 358 sbp->f_ffree = 0; /* " " */ 359 sbp->f_favail = 0; /* " " */ 360 sbp->f_fresvd = 0; 361 copy_statvfs_info(sbp, mp); 362 return (0); 363 } 364 365 /* 366 * lookup an anode, if not found, create 367 * return locked and referenced al la vget(vp, LK_EXCLUSIVE); 368 */ 369 int 370 adosfs_vget(struct mount *mp, ino_t an, struct vnode **vpp) 371 { 372 int error; 373 374 error = vcache_get(mp, &an, sizeof(an), vpp); 375 if (error) 376 return error; 377 error = vn_lock(*vpp, LK_EXCLUSIVE); 378 if (error) { 379 vrele(*vpp); 380 *vpp = NULL; 381 return error; 382 } 383 return 0; 384 } 385 386 /* 387 * Initialize this vnode / anode pair. 388 * Caller assures no other thread will try to load this inode. 389 */ 390 int 391 adosfs_loadvnode(struct mount *mp, struct vnode *vp, 392 const void *key, size_t key_len, const void **new_key) 393 { 394 struct adosfsmount *amp; 395 struct anode *ap; 396 struct buf *bp; 397 ino_t an; 398 char *nam, *tmp; 399 int namlen, error; 400 401 KASSERT(key_len == sizeof(an)); 402 memcpy(&an, key, key_len); 403 amp = VFSTOADOSFS(mp); 404 405 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 406 amp->bsize, NOCRED, 0, &bp)) != 0) 407 return error; 408 409 ap = pool_get(&adosfs_node_pool, PR_WAITOK); 410 memset(ap, 0, sizeof(struct anode)); 411 ap->vp = vp; 412 ap->amp = amp; 413 ap->block = an; 414 ap->nwords = amp->nwords; 415 416 /* 417 * get type and fill rest in based on that. 418 */ 419 switch (ap->type = adosfs_getblktype(amp, bp)) { 420 case AROOT: 421 vp->v_type = VDIR; 422 vp->v_vflag |= VV_ROOT; 423 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 424 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 425 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 426 ap->created.days = adoswordn(bp, ap->nwords - 7); 427 ap->created.mins = adoswordn(bp, ap->nwords - 6); 428 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 429 break; 430 case ALDIR: 431 case ADIR: 432 vp->v_type = VDIR; 433 break; 434 case ALFILE: 435 case AFILE: 436 vp->v_type = VREG; 437 ap->fsize = adoswordn(bp, ap->nwords - 47); 438 break; 439 case ASLINK: /* XXX soft link */ 440 vp->v_type = VLNK; 441 /* 442 * convert from BCPL string and 443 * from: "part:dir/file" to: "/part/dir/file" 444 */ 445 nam = (char *)bp->b_data + (6 * sizeof(long)); 446 namlen = strlen(nam); 447 tmp = nam; 448 while (*tmp && *tmp != ':') 449 tmp++; 450 if (*tmp == 0) { 451 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 452 memcpy(ap->slinkto, nam, namlen); 453 } else if (*nam == ':') { 454 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 455 memcpy(ap->slinkto, nam, namlen); 456 ap->slinkto[0] = '/'; 457 } else { 458 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 459 ap->slinkto[0] = '/'; 460 memcpy(&ap->slinkto[1], nam, namlen); 461 ap->slinkto[tmp - nam + 1] = '/'; 462 namlen++; 463 } 464 ap->slinkto[namlen] = 0; 465 ap->fsize = namlen; 466 break; 467 default: 468 error = EINVAL; 469 goto bad; 470 } 471 472 /* 473 * Get appropriate data from this block; hard link needs 474 * to get other data from the "real" block. 475 */ 476 477 /* 478 * copy in name (from original block) 479 */ 480 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 481 namlen = *(u_char *)nam++; 482 if (namlen > 30) { 483 #ifdef DIAGNOSTIC 484 printf("adosfs: aget: name length too long blk %llu\n", 485 (unsigned long long)an); 486 #endif 487 error = EINVAL; 488 goto bad; 489 } 490 memcpy(ap->name, nam, namlen); 491 ap->name[namlen] = 0; 492 493 /* 494 * if dir alloc hash table and copy it in 495 */ 496 if (vp->v_type == VDIR) { 497 int i; 498 499 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 500 ap->ntabent = ANODETABENT(ap); 501 ap->tabi = (int *)&ap->tab[ap->ntabent]; 502 memset(ap->tabi, 0, ANODETABSZ(ap)); 503 for (i = 0; i < ap->ntabent; i++) 504 ap->tab[i] = adoswordn(bp, i + 6); 505 } 506 507 /* 508 * misc. 509 */ 510 ap->pblock = adoswordn(bp, ap->nwords - 3); 511 ap->hashf = adoswordn(bp, ap->nwords - 4); 512 ap->linknext = adoswordn(bp, ap->nwords - 10); 513 ap->linkto = adoswordn(bp, ap->nwords - 11); 514 515 /* 516 * setup last indirect block cache. 517 */ 518 ap->lastlindblk = 0; 519 if (ap->type == AFILE) { 520 ap->lastindblk = ap->block; 521 if (adoswordn(bp, ap->nwords - 10)) 522 ap->linkto = ap->block; 523 } else if (ap->type == ALFILE) { 524 ap->lastindblk = ap->linkto; 525 brelse(bp, 0); 526 bp = NULL; 527 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 528 amp->bsize, NOCRED, 0, &bp); 529 if (error) 530 goto bad; 531 ap->fsize = adoswordn(bp, ap->nwords - 47); 532 } 533 534 if (ap->type == AROOT) { 535 ap->adprot = 15; 536 ap->uid = amp->uid; 537 ap->gid = amp->gid; 538 } else { 539 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 540 /* 541 * ADOS directories do not have a `x' protection bit as 542 * it is known in VFS; this functionality is fulfilled 543 * by the ADOS `r' bit. 544 * 545 * To retain the ADOS behaviour, fake execute permissions 546 * in that case. 547 */ 548 if ((ap->type == ADIR || ap->type == ALDIR) && 549 (ap->adprot & 0x00000008) == 0) 550 ap->adprot &= ~0x00000002; 551 552 /* 553 * Get uid/gid from extensions in file header 554 * (really need to know if this is a muFS partition) 555 */ 556 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 557 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 558 if (ap->uid || ap->gid) { 559 if (ap->uid == 0xffff) 560 ap->uid = 0; 561 if (ap->gid == 0xffff) 562 ap->gid = 0; 563 ap->adprot |= 0x40000000; /* Kludge */ 564 } 565 else { 566 /* 567 * uid & gid extension don't exist, 568 * so use the mount-point uid/gid 569 */ 570 ap->uid = amp->uid; 571 ap->gid = amp->gid; 572 } 573 } 574 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 575 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 576 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 577 578 brelse(bp, 0); 579 vp->v_tag = VT_ADOSFS; 580 vp->v_op = adosfs_vnodeop_p; 581 vp->v_data = ap; 582 genfs_node_init(vp, &adosfs_genfsops); 583 uvm_vnp_setsize(vp, ap->fsize); 584 *new_key = &ap->block; 585 return 0; 586 587 bad: 588 if (bp) 589 brelse(bp, 0); 590 pool_put(&adosfs_node_pool, ap); 591 return error; 592 } 593 594 /* 595 * Load the bitmap into memory, and count the number of available 596 * blocks. 597 * The bitmap will be released if the filesystem is read-only; it's 598 * only needed to find the free space. 599 */ 600 int 601 adosfs_loadbitmap(struct adosfsmount *amp) 602 { 603 struct buf *bp, *mapbp; 604 u_long bn; 605 int blkix, endix, mapix; 606 int bmsize; 607 int error; 608 609 bp = mapbp = NULL; 610 bn = amp->rootb; 611 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 612 NOCRED, 0, &bp)) != 0) { 613 return (error); 614 } 615 blkix = amp->nwords - 49; 616 endix = amp->nwords - 24; 617 mapix = 0; 618 bmsize = (amp->numblks + 31) / 32; 619 while (mapix < bmsize) { 620 int n; 621 u_long bits; 622 623 if (adoswordn(bp, blkix) == 0) 624 break; 625 if (mapbp != NULL) 626 brelse(mapbp, 0); 627 if ((error = bread(amp->devvp, 628 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 629 NOCRED, 0, &mapbp)) != 0) 630 break; 631 if (adoscksum(mapbp, amp->nwords)) { 632 #ifdef DIAGNOSTIC 633 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 634 adoswordn(bp, blkix)); 635 #endif 636 /* XXX Force read-only? Set free space 0? */ 637 break; 638 } 639 n = 1; 640 while (n < amp->nwords && mapix < bmsize) { 641 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 642 ++n; 643 if (mapix == bmsize && amp->numblks & 31) 644 bits &= ~(0xffffffff << (amp->numblks & 31)); 645 while (bits) { 646 if (bits & 1) 647 ++amp->freeblks; 648 bits >>= 1; 649 } 650 } 651 ++blkix; 652 if (mapix < bmsize && blkix == endix) { 653 bn = adoswordn(bp, blkix); 654 brelse(bp, 0); 655 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 656 amp->bsize, NOCRED, 0, &bp)) != 0) 657 break; 658 /* 659 * Why is there no checksum on these blocks? 660 */ 661 blkix = 0; 662 endix = amp->nwords - 1; 663 } 664 } 665 if (bp) 666 brelse(bp, 0); 667 if (mapbp) 668 brelse(mapbp, 0); 669 return (error); 670 } 671 672 673 /* 674 * File handle to vnode 675 * 676 * Have to be really careful about stale file handles: 677 * - check that the inode number is in range 678 * - call iget() to get the locked inode 679 * - check for an unallocated inode (i_mode == 0) 680 * - check that the generation number matches 681 */ 682 683 struct ifid { 684 ushort ifid_len; 685 ushort ifid_pad; 686 int ifid_ino; 687 long ifid_start; 688 }; 689 690 int 691 adosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 692 { 693 struct ifid ifh; 694 #if 0 695 struct anode *ap; 696 #endif 697 struct vnode *nvp; 698 int error; 699 700 if (fhp->fid_len != sizeof(struct ifid)) 701 return EINVAL; 702 703 #ifdef ADOSFS_DIAGNOSTIC 704 printf("adfhtovp(%p, %p, %p)\n", mp, fhp, vpp); 705 #endif 706 707 memcpy(&ifh, fhp, sizeof(ifh)); 708 709 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 710 *vpp = NULLVP; 711 return (error); 712 } 713 #if 0 714 ap = VTOA(nvp); 715 if (ap->inode.iso_mode == 0) { 716 vput(nvp); 717 *vpp = NULLVP; 718 return (ESTALE); 719 } 720 #endif 721 *vpp = nvp; 722 return(0); 723 } 724 725 int 726 adosfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 727 { 728 struct anode *ap = VTOA(vp); 729 struct ifid ifh; 730 731 if (*fh_size < sizeof(struct ifid)) { 732 *fh_size = sizeof(struct ifid); 733 return E2BIG; 734 } 735 *fh_size = sizeof(struct ifid); 736 737 memset(&ifh, 0, sizeof(ifh)); 738 ifh.ifid_len = sizeof(struct ifid); 739 ifh.ifid_ino = ap->block; 740 ifh.ifid_start = ap->block; 741 memcpy(fhp, &ifh, sizeof(ifh)); 742 743 #ifdef ADOSFS_DIAGNOSTIC 744 printf("advptofh(%p, %p)\n", vp, fhp); 745 #endif 746 return(0); 747 } 748 749 int 750 adosfs_sync(struct mount *mp, int waitfor, kauth_cred_t uc) 751 { 752 #ifdef ADOSFS_DIAGNOSTIC 753 printf("ad_sync(%p, %d)\n", mp, waitfor); 754 #endif 755 return(0); 756 } 757 758 void 759 adosfs_init(void) 760 { 761 762 malloc_type_attach(M_ANODE); 763 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 764 &pool_allocator_nointr, IPL_NONE); 765 } 766 767 void 768 adosfs_done(void) 769 { 770 771 pool_destroy(&adosfs_node_pool); 772 malloc_type_detach(M_ANODE); 773 } 774 775 /* 776 * vfs generic function call table 777 */ 778 779 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 780 781 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 782 &adosfs_vnodeop_opv_desc, 783 NULL, 784 }; 785 786 struct vfsops adosfs_vfsops = { 787 .vfs_name = MOUNT_ADOSFS, 788 .vfs_min_mount_data = sizeof (struct adosfs_args), 789 .vfs_mount = adosfs_mount, 790 .vfs_start = adosfs_start, 791 .vfs_unmount = adosfs_unmount, 792 .vfs_root = adosfs_root, 793 .vfs_quotactl = (void *)eopnotsupp, 794 .vfs_statvfs = adosfs_statvfs, 795 .vfs_sync = adosfs_sync, 796 .vfs_vget = adosfs_vget, 797 .vfs_loadvnode = adosfs_loadvnode, 798 .vfs_fhtovp = adosfs_fhtovp, 799 .vfs_vptofh = adosfs_vptofh, 800 .vfs_init = adosfs_init, 801 .vfs_done = adosfs_done, 802 .vfs_snapshot = (void *)eopnotsupp, 803 .vfs_extattrctl = vfs_stdextattrctl, 804 .vfs_suspendctl = (void *)eopnotsupp, 805 .vfs_renamelock_enter = genfs_renamelock_enter, 806 .vfs_renamelock_exit = genfs_renamelock_exit, 807 .vfs_fsync = (void *)eopnotsupp, 808 .vfs_opv_descs = adosfs_vnodeopv_descs 809 }; 810 811 static int 812 adosfs_modcmd(modcmd_t cmd, void *arg) 813 { 814 int error; 815 816 switch (cmd) { 817 case MODULE_CMD_INIT: 818 error = vfs_attach(&adosfs_vfsops); 819 if (error != 0) 820 break; 821 sysctl_createv(&adosfs_sysctl_log, 0, NULL, NULL, 822 CTLFLAG_PERMANENT, 823 CTLTYPE_NODE, "adosfs", 824 SYSCTL_DESCR("AmigaDOS file system"), 825 NULL, 0, NULL, 0, 826 CTL_VFS, 16, CTL_EOL); 827 /* 828 * XXX the "16" above could be dynamic, thereby eliminating 829 * one more instance of the "number to vfs" mapping problem, 830 * but "16" is the order as taken from sys/mount.h 831 */ 832 break; 833 case MODULE_CMD_FINI: 834 error = vfs_detach(&adosfs_vfsops); 835 if (error != 0) 836 break; 837 sysctl_teardown(&adosfs_sysctl_log); 838 break; 839 default: 840 error = ENOTTY; 841 break; 842 } 843 844 return (error); 845 } 846