1 /* $NetBSD: advfsops.c,v 1.75 2015/11/18 22:06:25 phx 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 1.75 2015/11/18 22:06:25 phx 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 == DKTYPE_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, 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 368 */ 369 int 370 adosfs_vget(struct mount *mp, ino_t an, struct vnode **vpp) 371 { 372 u_long block; 373 int error; 374 375 block = an; 376 KASSERT(block == an); 377 error = vcache_get(mp, &block, sizeof(block), vpp); 378 if (error) 379 return error; 380 error = vn_lock(*vpp, LK_EXCLUSIVE); 381 if (error) { 382 vrele(*vpp); 383 *vpp = NULL; 384 return error; 385 } 386 return 0; 387 } 388 389 /* 390 * Initialize this vnode / anode pair. 391 * Caller assures no other thread will try to load this inode. 392 */ 393 int 394 adosfs_loadvnode(struct mount *mp, struct vnode *vp, 395 const void *key, size_t key_len, const void **new_key) 396 { 397 struct adosfsmount *amp; 398 struct anode *ap; 399 struct buf *bp; 400 u_long an; 401 char *nam, *tmp; 402 int namlen, error; 403 404 KASSERT(key_len == sizeof(an)); 405 memcpy(&an, key, key_len); 406 amp = VFSTOADOSFS(mp); 407 408 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 409 amp->bsize, 0, &bp)) != 0) 410 return error; 411 412 ap = pool_get(&adosfs_node_pool, PR_WAITOK); 413 memset(ap, 0, sizeof(struct anode)); 414 ap->vp = vp; 415 ap->amp = amp; 416 ap->block = an; 417 ap->nwords = amp->nwords; 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 error = EINVAL; 472 goto bad; 473 } 474 475 /* 476 * Get appropriate data from this block; hard link needs 477 * to get other data from the "real" block. 478 */ 479 480 /* 481 * copy in name (from original block) 482 */ 483 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 484 namlen = *(u_char *)nam++; 485 if (namlen > 30) { 486 #ifdef DIAGNOSTIC 487 printf("adosfs: aget: name length too long blk %llu\n", 488 (unsigned long long)an); 489 #endif 490 error = EINVAL; 491 goto bad; 492 } 493 memcpy(ap->name, nam, namlen); 494 ap->name[namlen] = 0; 495 496 /* 497 * if dir alloc hash table and copy it in 498 */ 499 if (vp->v_type == VDIR) { 500 int i; 501 502 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 503 ap->ntabent = ANODETABENT(ap); 504 ap->tabi = (int *)&ap->tab[ap->ntabent]; 505 memset(ap->tabi, 0, ANODETABSZ(ap)); 506 for (i = 0; i < ap->ntabent; i++) 507 ap->tab[i] = adoswordn(bp, i + 6); 508 } 509 510 /* 511 * misc. 512 */ 513 ap->pblock = adoswordn(bp, ap->nwords - 3); 514 ap->hashf = adoswordn(bp, ap->nwords - 4); 515 ap->linknext = adoswordn(bp, ap->nwords - 10); 516 ap->linkto = adoswordn(bp, ap->nwords - 11); 517 518 /* 519 * setup last indirect block cache. 520 */ 521 ap->lastlindblk = 0; 522 if (ap->type == AFILE) { 523 ap->lastindblk = ap->block; 524 if (adoswordn(bp, ap->nwords - 10)) 525 ap->linkto = ap->block; 526 } else if (ap->type == ALFILE) { 527 ap->lastindblk = ap->linkto; 528 brelse(bp, 0); 529 bp = NULL; 530 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 531 amp->bsize, 0, &bp); 532 if (error) 533 goto bad; 534 ap->fsize = adoswordn(bp, ap->nwords - 47); 535 } 536 537 if (ap->type == AROOT) { 538 ap->adprot = 15; 539 ap->uid = amp->uid; 540 ap->gid = amp->gid; 541 } else { 542 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 543 /* 544 * ADOS directories do not have a `x' protection bit as 545 * it is known in VFS; this functionality is fulfilled 546 * by the ADOS `r' bit. 547 * 548 * To retain the ADOS behaviour, fake execute permissions 549 * in that case. 550 */ 551 if ((ap->type == ADIR || ap->type == ALDIR) && 552 (ap->adprot & 0x00000008) == 0) 553 ap->adprot &= ~0x00000002; 554 555 /* 556 * Get uid/gid from extensions in file header 557 * (really need to know if this is a muFS partition) 558 */ 559 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 560 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 561 if (ap->uid || ap->gid) { 562 if (ap->uid == 0xffff) 563 ap->uid = 0; 564 if (ap->gid == 0xffff) 565 ap->gid = 0; 566 ap->adprot |= 0x40000000; /* Kludge */ 567 } 568 else { 569 /* 570 * uid & gid extension don't exist, 571 * so use the mount-point uid/gid 572 */ 573 ap->uid = amp->uid; 574 ap->gid = amp->gid; 575 } 576 } 577 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 578 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 579 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 580 581 brelse(bp, 0); 582 vp->v_tag = VT_ADOSFS; 583 vp->v_op = adosfs_vnodeop_p; 584 vp->v_data = ap; 585 genfs_node_init(vp, &adosfs_genfsops); 586 uvm_vnp_setsize(vp, ap->fsize); 587 *new_key = &ap->block; 588 return 0; 589 590 bad: 591 if (bp) 592 brelse(bp, 0); 593 pool_put(&adosfs_node_pool, ap); 594 return error; 595 } 596 597 /* 598 * Load the bitmap into memory, and count the number of available 599 * blocks. 600 * The bitmap will be released if the filesystem is read-only; it's 601 * only needed to find the free space. 602 */ 603 int 604 adosfs_loadbitmap(struct adosfsmount *amp) 605 { 606 struct buf *bp, *mapbp; 607 u_long bn; 608 int blkix, endix, mapix; 609 int bmsize; 610 int error; 611 612 bp = mapbp = NULL; 613 bn = amp->rootb; 614 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 615 0, &bp)) != 0) { 616 return (error); 617 } 618 blkix = amp->nwords - 49; 619 endix = amp->nwords - 24; 620 mapix = 0; 621 bmsize = (amp->numblks + 31) / 32; 622 while (mapix < bmsize) { 623 int n; 624 u_long bits; 625 626 if (adoswordn(bp, blkix) == 0) 627 break; 628 if (mapbp != NULL) 629 brelse(mapbp, 0); 630 if ((error = bread(amp->devvp, 631 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 632 0, &mapbp)) != 0) 633 break; 634 if (adoscksum(mapbp, amp->nwords)) { 635 #ifdef DIAGNOSTIC 636 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 637 adoswordn(bp, blkix)); 638 #endif 639 /* XXX Force read-only? Set free space 0? */ 640 break; 641 } 642 n = 1; 643 while (n < amp->nwords && mapix < bmsize) { 644 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 645 ++n; 646 if (mapix == bmsize && amp->numblks & 31) 647 bits &= ~(0xffffffff << (amp->numblks & 31)); 648 while (bits) { 649 if (bits & 1) 650 ++amp->freeblks; 651 bits >>= 1; 652 } 653 } 654 ++blkix; 655 if (mapix < bmsize && blkix == endix) { 656 bn = adoswordn(bp, blkix); 657 brelse(bp, 0); 658 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 659 amp->bsize, 0, &bp)) != 0) 660 break; 661 /* 662 * Why is there no checksum on these blocks? 663 */ 664 blkix = 0; 665 endix = amp->nwords - 1; 666 } 667 } 668 if (bp) 669 brelse(bp, 0); 670 if (mapbp) 671 brelse(mapbp, 0); 672 return (error); 673 } 674 675 676 /* 677 * File handle to vnode 678 * 679 * Have to be really careful about stale file handles: 680 * - check that the inode number is in range 681 * - call iget() to get the locked inode 682 * - check for an unallocated inode (i_mode == 0) 683 * - check that the generation number matches 684 */ 685 686 struct ifid { 687 ushort ifid_len; 688 ushort ifid_pad; 689 int ifid_ino; 690 long ifid_start; 691 }; 692 693 int 694 adosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 695 { 696 struct ifid ifh; 697 #if 0 698 struct anode *ap; 699 #endif 700 struct vnode *nvp; 701 int error; 702 703 if (fhp->fid_len != sizeof(struct ifid)) 704 return EINVAL; 705 706 #ifdef ADOSFS_DIAGNOSTIC 707 printf("adfhtovp(%p, %p, %p)\n", mp, fhp, vpp); 708 #endif 709 710 memcpy(&ifh, fhp, sizeof(ifh)); 711 712 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 713 *vpp = NULLVP; 714 return (error); 715 } 716 #if 0 717 ap = VTOA(nvp); 718 if (ap->inode.iso_mode == 0) { 719 vput(nvp); 720 *vpp = NULLVP; 721 return (ESTALE); 722 } 723 #endif 724 *vpp = nvp; 725 return(0); 726 } 727 728 int 729 adosfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 730 { 731 struct anode *ap = VTOA(vp); 732 struct ifid ifh; 733 734 if (*fh_size < sizeof(struct ifid)) { 735 *fh_size = sizeof(struct ifid); 736 return E2BIG; 737 } 738 *fh_size = sizeof(struct ifid); 739 740 memset(&ifh, 0, sizeof(ifh)); 741 ifh.ifid_len = sizeof(struct ifid); 742 ifh.ifid_ino = ap->block; 743 ifh.ifid_start = ap->block; 744 memcpy(fhp, &ifh, sizeof(ifh)); 745 746 #ifdef ADOSFS_DIAGNOSTIC 747 printf("advptofh(%p, %p)\n", vp, fhp); 748 #endif 749 return(0); 750 } 751 752 int 753 adosfs_sync(struct mount *mp, int waitfor, kauth_cred_t uc) 754 { 755 #ifdef ADOSFS_DIAGNOSTIC 756 printf("ad_sync(%p, %d)\n", mp, waitfor); 757 #endif 758 return(0); 759 } 760 761 void 762 adosfs_init(void) 763 { 764 765 malloc_type_attach(M_ANODE); 766 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 767 &pool_allocator_nointr, IPL_NONE); 768 } 769 770 void 771 adosfs_done(void) 772 { 773 774 pool_destroy(&adosfs_node_pool); 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_loadvnode = adosfs_loadvnode, 801 .vfs_fhtovp = adosfs_fhtovp, 802 .vfs_vptofh = adosfs_vptofh, 803 .vfs_init = adosfs_init, 804 .vfs_done = adosfs_done, 805 .vfs_snapshot = (void *)eopnotsupp, 806 .vfs_extattrctl = vfs_stdextattrctl, 807 .vfs_suspendctl = (void *)eopnotsupp, 808 .vfs_renamelock_enter = genfs_renamelock_enter, 809 .vfs_renamelock_exit = genfs_renamelock_exit, 810 .vfs_fsync = (void *)eopnotsupp, 811 .vfs_opv_descs = adosfs_vnodeopv_descs 812 }; 813 814 static int 815 adosfs_modcmd(modcmd_t cmd, void *arg) 816 { 817 int error; 818 819 switch (cmd) { 820 case MODULE_CMD_INIT: 821 error = vfs_attach(&adosfs_vfsops); 822 if (error != 0) 823 break; 824 sysctl_createv(&adosfs_sysctl_log, 0, NULL, NULL, 825 CTLFLAG_PERMANENT, 826 CTLTYPE_NODE, "adosfs", 827 SYSCTL_DESCR("AmigaDOS file system"), 828 NULL, 0, NULL, 0, 829 CTL_VFS, 16, CTL_EOL); 830 /* 831 * XXX the "16" above could be dynamic, thereby eliminating 832 * one more instance of the "number to vfs" mapping problem, 833 * but "16" is the order as taken from sys/mount.h 834 */ 835 break; 836 case MODULE_CMD_FINI: 837 error = vfs_detach(&adosfs_vfsops); 838 if (error != 0) 839 break; 840 sysctl_teardown(&adosfs_sysctl_log); 841 break; 842 default: 843 error = ENOTTY; 844 break; 845 } 846 847 return (error); 848 } 849