1 /* $NetBSD: advfsops.c,v 1.79 2020/03/16 21:20:09 pgoyette 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 1.79 2020/03/16 21:20:09 pgoyette 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 int adosfs_mountfs(struct vnode *, struct mount *, struct lwp *); 69 int adosfs_loadbitmap(struct adosfsmount *); 70 71 struct pool adosfs_node_pool; 72 73 MALLOC_JUSTDEFINE(M_ANODE, "adosfs anode","adosfs anode structures and tables"); 74 75 static const struct genfs_ops adosfs_genfsops = { 76 .gop_size = genfs_size, 77 }; 78 79 int (**adosfs_vnodeop_p)(void *); 80 81 int 82 adosfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 83 { 84 struct lwp *l = curlwp; 85 struct vnode *devvp; 86 struct adosfs_args *args = data; 87 struct adosfsmount *amp; 88 int error; 89 mode_t accessmode; 90 91 if (args == NULL) 92 return EINVAL; 93 if (*data_len < sizeof *args) 94 return EINVAL; 95 96 if (mp->mnt_flag & MNT_GETARGS) { 97 amp = VFSTOADOSFS(mp); 98 if (amp == NULL) 99 return EIO; 100 args->uid = amp->uid; 101 args->gid = amp->gid; 102 args->mask = amp->mask; 103 args->fspec = NULL; 104 *data_len = sizeof *args; 105 return 0; 106 } 107 108 if ((mp->mnt_flag & MNT_RDONLY) == 0) 109 return (EROFS); 110 111 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 112 return EOPNOTSUPP; 113 114 /* 115 * Not an update, or updating the name: look up the name 116 * and verify that it refers to a sensible block device. 117 */ 118 error = namei_simple_user(args->fspec, 119 NSM_FOLLOW_NOEMULROOT, &devvp); 120 if (error != 0) 121 return (error); 122 123 if (devvp->v_type != VBLK) { 124 vrele(devvp); 125 return (ENOTBLK); 126 } 127 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 128 vrele(devvp); 129 return (ENXIO); 130 } 131 /* 132 * If mount by non-root, then verify that user has necessary 133 * permissions on the device. 134 */ 135 accessmode = VREAD; 136 if ((mp->mnt_flag & MNT_RDONLY) == 0) 137 accessmode |= VWRITE; 138 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 139 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 140 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode)); 141 VOP_UNLOCK(devvp); 142 if (error) { 143 vrele(devvp); 144 return (error); 145 } 146 /* MNT_UPDATE? */ 147 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 148 vrele(devvp); 149 return (error); 150 } 151 amp = VFSTOADOSFS(mp); 152 amp->uid = args->uid; 153 amp->gid = args->gid; 154 amp->mask = args->mask; 155 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 156 mp->mnt_op->vfs_name, mp, l); 157 } 158 159 int 160 adosfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 161 { 162 struct disklabel dl; 163 struct partition *parp; 164 struct adosfsmount *amp; 165 struct buf *bp; 166 struct vnode *rvp; 167 size_t bitmap_sz = 0; 168 int error; 169 uint64_t numsecs; 170 unsigned secsize; 171 unsigned long secsperblk, blksperdisk, resvblks; 172 173 amp = NULL; 174 175 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 176 return (error); 177 178 /* 179 * open blkdev and read boot and root block 180 */ 181 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 182 if ((error = VOP_OPEN(devvp, FREAD, NOCRED)) != 0) { 183 VOP_UNLOCK(devvp); 184 return (error); 185 } 186 187 error = getdisksize(devvp, &numsecs, &secsize); 188 if (error) 189 goto fail; 190 191 amp = kmem_zalloc(sizeof(struct adosfsmount), KM_SLEEP); 192 193 /* 194 * compute filesystem parameters from disklabel 195 * on arch/amiga the disklabel is computed from the native 196 * partition tables 197 * - p_fsize is the filesystem block size 198 * - p_frag is the number of sectors per filesystem block 199 * - p_cpg is the number of reserved blocks (boot blocks) 200 * - p_psize is reduced by the number of preallocated blocks 201 * at the end of a partition 202 * 203 * XXX 204 * - bsize and secsperblk could be computed from the first sector 205 * of the root block 206 * - resvblks (the number of boot blocks) can only be guessed 207 * by scanning for the root block as its position moves 208 * with resvblks 209 */ 210 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED); 211 VOP_UNLOCK(devvp); 212 if (error) 213 goto fail; 214 parp = &dl.d_partitions[DISKPART(devvp->v_rdev)]; 215 if (dl.d_type == DKTYPE_FLOPPY) { 216 amp->bsize = secsize; 217 secsperblk = 1; 218 resvblks = 2; 219 } else if (parp->p_fsize > 0 && parp->p_frag > 0) { 220 amp->bsize = parp->p_fsize * parp->p_frag; 221 secsperblk = parp->p_frag; 222 resvblks = parp->p_cpg; 223 } else { 224 error = EINVAL; 225 goto fail; 226 } 227 blksperdisk = numsecs / secsperblk; 228 229 230 /* The filesytem variant ('dostype') is stored in the boot block */ 231 bp = NULL; 232 if ((error = bread(devvp, (daddr_t)BBOFF, 233 amp->bsize, 0, &bp)) != 0) { 234 goto fail; 235 } 236 amp->dostype = adoswordn(bp, 0); 237 brelse(bp, 0); 238 239 /* basic sanity checks */ 240 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 241 error = EINVAL; 242 goto fail; 243 } 244 245 amp->rootb = (blksperdisk - 1 + resvblks) / 2; 246 amp->numblks = blksperdisk - resvblks; 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 amp->mp = mp; 253 mp->mnt_data = amp; 254 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 255 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 256 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 257 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 258 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 259 mp->mnt_dev_bshift = DEV_BSHIFT; 260 mp->mnt_flag |= MNT_LOCAL; 261 262 /* 263 * get the root anode, if not a valid fs this will fail. 264 */ 265 if ((error = VFS_ROOT(mp, LK_EXCLUSIVE, &rvp)) != 0) 266 goto fail; 267 /* allocate and load bitmap, set free space */ 268 bitmap_sz = ((amp->numblks + 31) / 32) * sizeof(*amp->bitmap); 269 amp->bitmap = kmem_alloc(bitmap_sz, KM_SLEEP); 270 adosfs_loadbitmap(amp); 271 if (mp->mnt_flag & MNT_RDONLY) { 272 /* 273 * Don't need the bitmap any more if it's read-only. 274 */ 275 kmem_free(amp->bitmap, bitmap_sz); 276 amp->bitmap = NULL; 277 } 278 vput(rvp); 279 280 return(0); 281 282 fail: 283 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 284 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 285 VOP_UNLOCK(devvp); 286 if (amp && amp->bitmap) 287 kmem_free(amp->bitmap, bitmap_sz); 288 if (amp) 289 kmem_free(amp, sizeof(*amp)); 290 return (error); 291 } 292 293 int 294 adosfs_start(struct mount *mp, int flags) 295 { 296 297 return (0); 298 } 299 300 int 301 adosfs_unmount(struct mount *mp, int mntflags) 302 { 303 struct adosfsmount *amp; 304 int error, flags; 305 306 flags = 0; 307 if (mntflags & MNT_FORCE) 308 flags |= FORCECLOSE; 309 if ((error = vflush(mp, NULLVP, flags)) != 0) 310 return (error); 311 amp = VFSTOADOSFS(mp); 312 if (amp->devvp->v_type != VBAD) 313 spec_node_setmountedfs(amp->devvp, NULL); 314 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 315 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 316 vput(amp->devvp); 317 if (amp->bitmap) { 318 size_t bitmap_sz = ((amp->numblks + 31) / 32) * 319 sizeof(*amp->bitmap); 320 kmem_free(amp->bitmap, bitmap_sz); 321 } 322 kmem_free(amp, sizeof(*amp)); 323 mp->mnt_data = NULL; 324 mp->mnt_flag &= ~MNT_LOCAL; 325 return (error); 326 } 327 328 int 329 adosfs_root(struct mount *mp, int lktype, struct vnode **vpp) 330 { 331 struct vnode *nvp; 332 int error; 333 334 error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, lktype, &nvp); 335 if (error != 0) 336 return (error); 337 /* XXX verify it's a root block? */ 338 *vpp = nvp; 339 return (0); 340 } 341 342 int 343 adosfs_statvfs(struct mount *mp, struct statvfs *sbp) 344 { 345 struct adosfsmount *amp; 346 347 amp = VFSTOADOSFS(mp); 348 sbp->f_bsize = amp->bsize; 349 sbp->f_frsize = amp->bsize; 350 sbp->f_iosize = amp->dbsize; 351 sbp->f_blocks = amp->numblks; 352 sbp->f_bfree = amp->freeblks; 353 sbp->f_bavail = amp->freeblks; 354 sbp->f_bresvd = 0; 355 sbp->f_files = 0; /* who knows */ 356 sbp->f_ffree = 0; /* " " */ 357 sbp->f_favail = 0; /* " " */ 358 sbp->f_fresvd = 0; 359 copy_statvfs_info(sbp, mp); 360 return (0); 361 } 362 363 /* 364 * lookup an anode, if not found, create 365 * return locked and referenced 366 */ 367 int 368 adosfs_vget(struct mount *mp, ino_t an, int lktype, struct vnode **vpp) 369 { 370 u_long block; 371 int error; 372 373 block = an; 374 KASSERT(block == an); 375 error = vcache_get(mp, &block, sizeof(block), vpp); 376 if (error) 377 return error; 378 error = vn_lock(*vpp, lktype); 379 if (error) { 380 vrele(*vpp); 381 *vpp = NULL; 382 return error; 383 } 384 return 0; 385 } 386 387 /* 388 * Initialize this vnode / anode pair. 389 * Caller assures no other thread will try to load this inode. 390 */ 391 int 392 adosfs_loadvnode(struct mount *mp, struct vnode *vp, 393 const void *key, size_t key_len, const void **new_key) 394 { 395 struct adosfsmount *amp; 396 struct anode *ap; 397 struct buf *bp; 398 u_long an; 399 char *nam, *tmp; 400 int namlen, error; 401 402 KASSERT(key_len == sizeof(an)); 403 memcpy(&an, key, key_len); 404 amp = VFSTOADOSFS(mp); 405 406 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 407 amp->bsize, 0, &bp)) != 0) 408 return error; 409 410 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; 416 417 /* 418 * get type and fill rest in based on that. 419 */ 420 switch (ap->type = adosfs_getblktype(amp, bp)) { 421 case AROOT: 422 vp->v_type = VDIR; 423 vp->v_vflag |= VV_ROOT; 424 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 425 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 426 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 427 ap->created.days = adoswordn(bp, ap->nwords - 7); 428 ap->created.mins = adoswordn(bp, ap->nwords - 6); 429 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 430 break; 431 case ALDIR: 432 case ADIR: 433 vp->v_type = VDIR; 434 break; 435 case ALFILE: 436 case AFILE: 437 vp->v_type = VREG; 438 ap->fsize = adoswordn(bp, ap->nwords - 47); 439 break; 440 case ASLINK: /* XXX soft link */ 441 vp->v_type = VLNK; 442 /* 443 * convert from BCPL string and 444 * from: "part:dir/file" to: "/part/dir/file" 445 */ 446 nam = (char *)bp->b_data + (6 * sizeof(long)); 447 namlen = strlen(nam); 448 tmp = nam; 449 while (*tmp && *tmp != ':') 450 tmp++; 451 if (*tmp == 0) { 452 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 453 memcpy(ap->slinkto, nam, namlen); 454 } else if (*nam == ':') { 455 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 456 memcpy(ap->slinkto, nam, namlen); 457 ap->slinkto[0] = '/'; 458 } else { 459 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 460 ap->slinkto[0] = '/'; 461 memcpy(&ap->slinkto[1], nam, namlen); 462 ap->slinkto[tmp - nam + 1] = '/'; 463 namlen++; 464 } 465 ap->slinkto[namlen] = 0; 466 ap->fsize = namlen; 467 break; 468 default: 469 error = EINVAL; 470 goto bad; 471 } 472 473 /* 474 * Get appropriate data from this block; hard link needs 475 * to get other data from the "real" block. 476 */ 477 478 /* 479 * copy in name (from original block) 480 */ 481 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 482 namlen = *(u_char *)nam++; 483 if (namlen > 30) { 484 #ifdef DIAGNOSTIC 485 printf("adosfs: aget: name length too long blk %llu\n", 486 (unsigned long long)an); 487 #endif 488 error = EINVAL; 489 goto bad; 490 } 491 memcpy(ap->name, nam, namlen); 492 ap->name[namlen] = 0; 493 494 /* 495 * if dir alloc hash table and copy it in 496 */ 497 if (vp->v_type == VDIR) { 498 int i; 499 500 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 501 ap->ntabent = ANODETABENT(ap); 502 ap->tabi = (int *)&ap->tab[ap->ntabent]; 503 memset(ap->tabi, 0, ANODETABSZ(ap)); 504 for (i = 0; i < ap->ntabent; i++) 505 ap->tab[i] = adoswordn(bp, i + 6); 506 } 507 508 /* 509 * misc. 510 */ 511 ap->pblock = adoswordn(bp, ap->nwords - 3); 512 ap->hashf = adoswordn(bp, ap->nwords - 4); 513 ap->linknext = adoswordn(bp, ap->nwords - 10); 514 ap->linkto = adoswordn(bp, ap->nwords - 11); 515 516 /* 517 * setup last indirect block cache. 518 */ 519 ap->lastlindblk = 0; 520 if (ap->type == AFILE) { 521 ap->lastindblk = ap->block; 522 if (adoswordn(bp, ap->nwords - 10)) 523 ap->linkto = ap->block; 524 } else if (ap->type == ALFILE) { 525 ap->lastindblk = ap->linkto; 526 brelse(bp, 0); 527 bp = NULL; 528 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 529 amp->bsize, 0, &bp); 530 if (error) 531 goto bad; 532 ap->fsize = adoswordn(bp, ap->nwords - 47); 533 } 534 535 if (ap->type == AROOT) { 536 ap->adprot = 15; 537 ap->uid = amp->uid; 538 ap->gid = amp->gid; 539 } else { 540 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 541 /* 542 * ADOS directories do not have a `x' protection bit as 543 * it is known in VFS; this functionality is fulfilled 544 * by the ADOS `r' bit. 545 * 546 * To retain the ADOS behaviour, fake execute permissions 547 * in that case. 548 */ 549 if ((ap->type == ADIR || ap->type == ALDIR) && 550 (ap->adprot & 0x00000008) == 0) 551 ap->adprot &= ~0x00000002; 552 553 /* 554 * Get uid/gid from extensions in file header 555 * (really need to know if this is a muFS partition) 556 */ 557 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 558 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 559 if (ap->uid || ap->gid) { 560 if (ap->uid == 0xffff) 561 ap->uid = 0; 562 if (ap->gid == 0xffff) 563 ap->gid = 0; 564 ap->adprot |= 0x40000000; /* Kludge */ 565 } 566 else { 567 /* 568 * uid & gid extension don't exist, 569 * so use the mount-point uid/gid 570 */ 571 ap->uid = amp->uid; 572 ap->gid = amp->gid; 573 } 574 } 575 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 576 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 577 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 578 579 brelse(bp, 0); 580 vp->v_tag = VT_ADOSFS; 581 vp->v_op = adosfs_vnodeop_p; 582 vp->v_data = ap; 583 genfs_node_init(vp, &adosfs_genfsops); 584 uvm_vnp_setsize(vp, ap->fsize); 585 *new_key = &ap->block; 586 return 0; 587 588 bad: 589 if (bp) 590 brelse(bp, 0); 591 pool_put(&adosfs_node_pool, ap); 592 return error; 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 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 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, 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, int lktype, 693 struct vnode **vpp) 694 { 695 struct ifid ifh; 696 #if 0 697 struct anode *ap; 698 #endif 699 struct vnode *nvp; 700 int error; 701 702 if (fhp->fid_len != sizeof(struct ifid)) 703 return EINVAL; 704 705 #ifdef ADOSFS_DIAGNOSTIC 706 printf("adfhtovp(%p, %p, %p)\n", mp, fhp, vpp); 707 #endif 708 709 memcpy(&ifh, fhp, sizeof(ifh)); 710 711 if ((error = VFS_VGET(mp, ifh.ifid_ino, lktype, &nvp)) != 0) { 712 *vpp = NULLVP; 713 return (error); 714 } 715 #if 0 716 ap = VTOA(nvp); 717 if (ap->inode.iso_mode == 0) { 718 vput(nvp); 719 *vpp = NULLVP; 720 return (ESTALE); 721 } 722 #endif 723 *vpp = nvp; 724 return(0); 725 } 726 727 int 728 adosfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 729 { 730 struct anode *ap = VTOA(vp); 731 struct ifid ifh; 732 733 if (*fh_size < sizeof(struct ifid)) { 734 *fh_size = sizeof(struct ifid); 735 return E2BIG; 736 } 737 *fh_size = sizeof(struct ifid); 738 739 memset(&ifh, 0, sizeof(ifh)); 740 ifh.ifid_len = sizeof(struct ifid); 741 ifh.ifid_ino = ap->block; 742 ifh.ifid_start = ap->block; 743 memcpy(fhp, &ifh, sizeof(ifh)); 744 745 #ifdef ADOSFS_DIAGNOSTIC 746 printf("advptofh(%p, %p)\n", vp, fhp); 747 #endif 748 return(0); 749 } 750 751 int 752 adosfs_sync(struct mount *mp, int waitfor, kauth_cred_t uc) 753 { 754 #ifdef ADOSFS_DIAGNOSTIC 755 printf("ad_sync(%p, %d)\n", mp, waitfor); 756 #endif 757 return(0); 758 } 759 760 void 761 adosfs_init(void) 762 { 763 764 malloc_type_attach(M_ANODE); 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 malloc_type_detach(M_ANODE); 775 } 776 777 /* 778 * vfs generic function call table 779 */ 780 781 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 782 783 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 784 &adosfs_vnodeop_opv_desc, 785 NULL, 786 }; 787 788 struct vfsops adosfs_vfsops = { 789 .vfs_name = MOUNT_ADOSFS, 790 .vfs_min_mount_data = sizeof (struct adosfs_args), 791 .vfs_mount = adosfs_mount, 792 .vfs_start = adosfs_start, 793 .vfs_unmount = adosfs_unmount, 794 .vfs_root = adosfs_root, 795 .vfs_quotactl = (void *)eopnotsupp, 796 .vfs_statvfs = adosfs_statvfs, 797 .vfs_sync = adosfs_sync, 798 .vfs_vget = adosfs_vget, 799 .vfs_loadvnode = adosfs_loadvnode, 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 = genfs_suspendctl, 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 SYSCTL_SETUP(adosfs_sysctl_setup, "adosfs sysctl") 814 { sysctl_createv(clog, 0, NULL, NULL, 815 CTLFLAG_PERMANENT, 816 CTLTYPE_NODE, "adosfs", 817 SYSCTL_DESCR("AmigaDOS file system"), 818 NULL, 0, NULL, 0, 819 CTL_VFS, 16, CTL_EOL); 820 } 821 822 static int 823 adosfs_modcmd(modcmd_t cmd, void *arg) 824 { 825 int error; 826 827 switch (cmd) { 828 case MODULE_CMD_INIT: 829 error = vfs_attach(&adosfs_vfsops); 830 if (error != 0) 831 break; 832 /* 833 * XXX the "16" above could be dynamic, thereby eliminating 834 * one more instance of the "number to vfs" mapping problem, 835 * but "16" is the order as taken from sys/mount.h 836 */ 837 break; 838 case MODULE_CMD_FINI: 839 error = vfs_detach(&adosfs_vfsops); 840 if (error != 0) 841 break; 842 break; 843 default: 844 error = ENOTTY; 845 break; 846 } 847 848 return (error); 849 } 850