advfsops.c revision 1.77
1 /* $NetBSD: advfsops.c,v 1.77 2017/06/01 02:45:12 chs 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 1.77 2017/06/01 02:45:12 chs 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 adosfs_loadbitmap(amp); 273 if (mp->mnt_flag & MNT_RDONLY) { 274 /* 275 * Don't need the bitmap any more if it's read-only. 276 */ 277 kmem_free(amp->bitmap, bitmap_sz); 278 amp->bitmap = NULL; 279 } 280 vput(rvp); 281 282 return(0); 283 284 fail: 285 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 286 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 287 VOP_UNLOCK(devvp); 288 if (amp && amp->bitmap) 289 kmem_free(amp->bitmap, bitmap_sz); 290 if (amp) 291 kmem_free(amp, sizeof(*amp)); 292 return (error); 293 } 294 295 int 296 adosfs_start(struct mount *mp, int flags) 297 { 298 299 return (0); 300 } 301 302 int 303 adosfs_unmount(struct mount *mp, int mntflags) 304 { 305 struct adosfsmount *amp; 306 int error, flags; 307 308 flags = 0; 309 if (mntflags & MNT_FORCE) 310 flags |= FORCECLOSE; 311 if ((error = vflush(mp, NULLVP, flags)) != 0) 312 return (error); 313 amp = VFSTOADOSFS(mp); 314 if (amp->devvp->v_type != VBAD) 315 spec_node_setmountedfs(amp->devvp, NULL); 316 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 317 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 318 vput(amp->devvp); 319 if (amp->bitmap) { 320 size_t bitmap_sz = ((amp->numblks + 31) / 32) * 321 sizeof(*amp->bitmap); 322 kmem_free(amp->bitmap, bitmap_sz); 323 } 324 kmem_free(amp, sizeof(*amp)); 325 mp->mnt_data = NULL; 326 mp->mnt_flag &= ~MNT_LOCAL; 327 return (error); 328 } 329 330 int 331 adosfs_root(struct mount *mp, struct vnode **vpp) 332 { 333 struct vnode *nvp; 334 int error; 335 336 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 337 return (error); 338 /* XXX verify it's a root block? */ 339 *vpp = nvp; 340 return (0); 341 } 342 343 int 344 adosfs_statvfs(struct mount *mp, struct statvfs *sbp) 345 { 346 struct adosfsmount *amp; 347 348 amp = VFSTOADOSFS(mp); 349 sbp->f_bsize = amp->bsize; 350 sbp->f_frsize = amp->bsize; 351 sbp->f_iosize = amp->dbsize; 352 sbp->f_blocks = amp->numblks; 353 sbp->f_bfree = amp->freeblks; 354 sbp->f_bavail = amp->freeblks; 355 sbp->f_bresvd = 0; 356 sbp->f_files = 0; /* who knows */ 357 sbp->f_ffree = 0; /* " " */ 358 sbp->f_favail = 0; /* " " */ 359 sbp->f_fresvd = 0; 360 copy_statvfs_info(sbp, mp); 361 return (0); 362 } 363 364 /* 365 * lookup an anode, if not found, create 366 * return locked and referenced 367 */ 368 int 369 adosfs_vget(struct mount *mp, ino_t an, struct vnode **vpp) 370 { 371 u_long block; 372 int error; 373 374 block = an; 375 KASSERT(block == an); 376 error = vcache_get(mp, &block, sizeof(block), vpp); 377 if (error) 378 return error; 379 error = vn_lock(*vpp, LK_EXCLUSIVE); 380 if (error) { 381 vrele(*vpp); 382 *vpp = NULL; 383 return error; 384 } 385 return 0; 386 } 387 388 /* 389 * Initialize this vnode / anode pair. 390 * Caller assures no other thread will try to load this inode. 391 */ 392 int 393 adosfs_loadvnode(struct mount *mp, struct vnode *vp, 394 const void *key, size_t key_len, const void **new_key) 395 { 396 struct adosfsmount *amp; 397 struct anode *ap; 398 struct buf *bp; 399 u_long an; 400 char *nam, *tmp; 401 int namlen, error; 402 403 KASSERT(key_len == sizeof(an)); 404 memcpy(&an, key, key_len); 405 amp = VFSTOADOSFS(mp); 406 407 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 408 amp->bsize, 0, &bp)) != 0) 409 return error; 410 411 ap = pool_get(&adosfs_node_pool, PR_WAITOK); 412 memset(ap, 0, sizeof(struct anode)); 413 ap->vp = vp; 414 ap->amp = amp; 415 ap->block = an; 416 ap->nwords = amp->nwords; 417 418 /* 419 * get type and fill rest in based on that. 420 */ 421 switch (ap->type = adosfs_getblktype(amp, bp)) { 422 case AROOT: 423 vp->v_type = VDIR; 424 vp->v_vflag |= VV_ROOT; 425 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 426 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 427 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 428 ap->created.days = adoswordn(bp, ap->nwords - 7); 429 ap->created.mins = adoswordn(bp, ap->nwords - 6); 430 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 431 break; 432 case ALDIR: 433 case ADIR: 434 vp->v_type = VDIR; 435 break; 436 case ALFILE: 437 case AFILE: 438 vp->v_type = VREG; 439 ap->fsize = adoswordn(bp, ap->nwords - 47); 440 break; 441 case ASLINK: /* XXX soft link */ 442 vp->v_type = VLNK; 443 /* 444 * convert from BCPL string and 445 * from: "part:dir/file" to: "/part/dir/file" 446 */ 447 nam = (char *)bp->b_data + (6 * sizeof(long)); 448 namlen = strlen(nam); 449 tmp = nam; 450 while (*tmp && *tmp != ':') 451 tmp++; 452 if (*tmp == 0) { 453 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 454 memcpy(ap->slinkto, nam, namlen); 455 } else if (*nam == ':') { 456 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 457 memcpy(ap->slinkto, nam, namlen); 458 ap->slinkto[0] = '/'; 459 } else { 460 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 461 ap->slinkto[0] = '/'; 462 memcpy(&ap->slinkto[1], nam, namlen); 463 ap->slinkto[tmp - nam + 1] = '/'; 464 namlen++; 465 } 466 ap->slinkto[namlen] = 0; 467 ap->fsize = namlen; 468 break; 469 default: 470 error = EINVAL; 471 goto bad; 472 } 473 474 /* 475 * Get appropriate data from this block; hard link needs 476 * to get other data from the "real" block. 477 */ 478 479 /* 480 * copy in name (from original block) 481 */ 482 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 483 namlen = *(u_char *)nam++; 484 if (namlen > 30) { 485 #ifdef DIAGNOSTIC 486 printf("adosfs: aget: name length too long blk %llu\n", 487 (unsigned long long)an); 488 #endif 489 error = EINVAL; 490 goto bad; 491 } 492 memcpy(ap->name, nam, namlen); 493 ap->name[namlen] = 0; 494 495 /* 496 * if dir alloc hash table and copy it in 497 */ 498 if (vp->v_type == VDIR) { 499 int i; 500 501 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 502 ap->ntabent = ANODETABENT(ap); 503 ap->tabi = (int *)&ap->tab[ap->ntabent]; 504 memset(ap->tabi, 0, ANODETABSZ(ap)); 505 for (i = 0; i < ap->ntabent; i++) 506 ap->tab[i] = adoswordn(bp, i + 6); 507 } 508 509 /* 510 * misc. 511 */ 512 ap->pblock = adoswordn(bp, ap->nwords - 3); 513 ap->hashf = adoswordn(bp, ap->nwords - 4); 514 ap->linknext = adoswordn(bp, ap->nwords - 10); 515 ap->linkto = adoswordn(bp, ap->nwords - 11); 516 517 /* 518 * setup last indirect block cache. 519 */ 520 ap->lastlindblk = 0; 521 if (ap->type == AFILE) { 522 ap->lastindblk = ap->block; 523 if (adoswordn(bp, ap->nwords - 10)) 524 ap->linkto = ap->block; 525 } else if (ap->type == ALFILE) { 526 ap->lastindblk = ap->linkto; 527 brelse(bp, 0); 528 bp = NULL; 529 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 530 amp->bsize, 0, &bp); 531 if (error) 532 goto bad; 533 ap->fsize = adoswordn(bp, ap->nwords - 47); 534 } 535 536 if (ap->type == AROOT) { 537 ap->adprot = 15; 538 ap->uid = amp->uid; 539 ap->gid = amp->gid; 540 } else { 541 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 542 /* 543 * ADOS directories do not have a `x' protection bit as 544 * it is known in VFS; this functionality is fulfilled 545 * by the ADOS `r' bit. 546 * 547 * To retain the ADOS behaviour, fake execute permissions 548 * in that case. 549 */ 550 if ((ap->type == ADIR || ap->type == ALDIR) && 551 (ap->adprot & 0x00000008) == 0) 552 ap->adprot &= ~0x00000002; 553 554 /* 555 * Get uid/gid from extensions in file header 556 * (really need to know if this is a muFS partition) 557 */ 558 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 559 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 560 if (ap->uid || ap->gid) { 561 if (ap->uid == 0xffff) 562 ap->uid = 0; 563 if (ap->gid == 0xffff) 564 ap->gid = 0; 565 ap->adprot |= 0x40000000; /* Kludge */ 566 } 567 else { 568 /* 569 * uid & gid extension don't exist, 570 * so use the mount-point uid/gid 571 */ 572 ap->uid = amp->uid; 573 ap->gid = amp->gid; 574 } 575 } 576 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 577 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 578 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 579 580 brelse(bp, 0); 581 vp->v_tag = VT_ADOSFS; 582 vp->v_op = adosfs_vnodeop_p; 583 vp->v_data = ap; 584 genfs_node_init(vp, &adosfs_genfsops); 585 uvm_vnp_setsize(vp, ap->fsize); 586 *new_key = &ap->block; 587 return 0; 588 589 bad: 590 if (bp) 591 brelse(bp, 0); 592 pool_put(&adosfs_node_pool, ap); 593 return error; 594 } 595 596 /* 597 * Load the bitmap into memory, and count the number of available 598 * blocks. 599 * The bitmap will be released if the filesystem is read-only; it's 600 * only needed to find the free space. 601 */ 602 int 603 adosfs_loadbitmap(struct adosfsmount *amp) 604 { 605 struct buf *bp, *mapbp; 606 u_long bn; 607 int blkix, endix, mapix; 608 int bmsize; 609 int error; 610 611 bp = mapbp = NULL; 612 bn = amp->rootb; 613 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 614 0, &bp)) != 0) { 615 return (error); 616 } 617 blkix = amp->nwords - 49; 618 endix = amp->nwords - 24; 619 mapix = 0; 620 bmsize = (amp->numblks + 31) / 32; 621 while (mapix < bmsize) { 622 int n; 623 u_long bits; 624 625 if (adoswordn(bp, blkix) == 0) 626 break; 627 if (mapbp != NULL) 628 brelse(mapbp, 0); 629 if ((error = bread(amp->devvp, 630 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 631 0, &mapbp)) != 0) 632 break; 633 if (adoscksum(mapbp, amp->nwords)) { 634 #ifdef DIAGNOSTIC 635 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 636 adoswordn(bp, blkix)); 637 #endif 638 /* XXX Force read-only? Set free space 0? */ 639 break; 640 } 641 n = 1; 642 while (n < amp->nwords && mapix < bmsize) { 643 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 644 ++n; 645 if (mapix == bmsize && amp->numblks & 31) 646 bits &= ~(0xffffffff << (amp->numblks & 31)); 647 while (bits) { 648 if (bits & 1) 649 ++amp->freeblks; 650 bits >>= 1; 651 } 652 } 653 ++blkix; 654 if (mapix < bmsize && blkix == endix) { 655 bn = adoswordn(bp, blkix); 656 brelse(bp, 0); 657 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 658 amp->bsize, 0, &bp)) != 0) 659 break; 660 /* 661 * Why is there no checksum on these blocks? 662 */ 663 blkix = 0; 664 endix = amp->nwords - 1; 665 } 666 } 667 if (bp) 668 brelse(bp, 0); 669 if (mapbp) 670 brelse(mapbp, 0); 671 return (error); 672 } 673 674 675 /* 676 * File handle to vnode 677 * 678 * Have to be really careful about stale file handles: 679 * - check that the inode number is in range 680 * - call iget() to get the locked inode 681 * - check for an unallocated inode (i_mode == 0) 682 * - check that the generation number matches 683 */ 684 685 struct ifid { 686 ushort ifid_len; 687 ushort ifid_pad; 688 int ifid_ino; 689 long ifid_start; 690 }; 691 692 int 693 adosfs_fhtovp(struct mount *mp, struct fid *fhp, 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, &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 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
Indexes created Mon Sep 29 18:09:42 GMT 2025