advfsops.c revision 1.67
1 /* $NetBSD: advfsops.c,v 1.67 2013/09/30 18:57:59 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 1.67 2013/09/30 18:57:59 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 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 (*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, i; 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 * init anode table. 266 */ 267 for (i = 0; i < ANODEHASHSZ; i++) 268 LIST_INIT(&->anodetab[i]); 269 270 /* 271 * get the root anode, if not a valid fs this will fail. 272 */ 273 if ((error = VFS_ROOT(mp, &rvp)) != 0) 274 goto fail; 275 /* allocate and load bitmap, set free space */ 276 bitmap_sz = ((amp->numblks + 31) / 32) * sizeof(*amp->bitmap); 277 amp->bitmap = kmem_alloc(bitmap_sz, KM_SLEEP); 278 if (amp->bitmap) 279 adosfs_loadbitmap(amp); 280 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 281 /* 282 * Don't need the bitmap any more if it's read-only. 283 */ 284 kmem_free(amp->bitmap, bitmap_sz); 285 amp->bitmap = NULL; 286 } 287 vput(rvp); 288 289 return(0); 290 291 fail: 292 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 293 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 294 VOP_UNLOCK(devvp); 295 if (amp && amp->bitmap) 296 kmem_free(amp->bitmap, bitmap_sz); 297 if (amp) 298 kmem_free(amp, sizeof(*amp)); 299 return (error); 300 } 301 302 int 303 adosfs_start(struct mount *mp, int flags) 304 { 305 306 return (0); 307 } 308 309 int 310 adosfs_unmount(struct mount *mp, int mntflags) 311 { 312 struct adosfsmount *amp; 313 int error, flags; 314 315 flags = 0; 316 if (mntflags & MNT_FORCE) 317 flags |= FORCECLOSE; 318 if ((error = vflush(mp, NULLVP, flags)) != 0) 319 return (error); 320 amp = VFSTOADOSFS(mp); 321 if (amp->devvp->v_type != VBAD) 322 spec_node_setmountedfs(amp->devvp, NULL); 323 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 324 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 325 vput(amp->devvp); 326 if (amp->bitmap) { 327 size_t bitmap_sz = ((amp->numblks + 31) / 32) * 328 sizeof(*amp->bitmap); 329 kmem_free(amp->bitmap, bitmap_sz); 330 } 331 kmem_free(amp, sizeof(*amp)); 332 mp->mnt_data = NULL; 333 mp->mnt_flag &= ~MNT_LOCAL; 334 return (error); 335 } 336 337 int 338 adosfs_root(struct mount *mp, struct vnode **vpp) 339 { 340 struct vnode *nvp; 341 int error; 342 343 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 344 return (error); 345 /* XXX verify it's a root block? */ 346 *vpp = nvp; 347 return (0); 348 } 349 350 int 351 adosfs_statvfs(struct mount *mp, struct statvfs *sbp) 352 { 353 struct adosfsmount *amp; 354 355 amp = VFSTOADOSFS(mp); 356 sbp->f_bsize = amp->bsize; 357 sbp->f_frsize = amp->bsize; 358 sbp->f_iosize = amp->dbsize; 359 sbp->f_blocks = amp->numblks; 360 sbp->f_bfree = amp->freeblks; 361 sbp->f_bavail = amp->freeblks; 362 sbp->f_bresvd = 0; 363 sbp->f_files = 0; /* who knows */ 364 sbp->f_ffree = 0; /* " " */ 365 sbp->f_favail = 0; /* " " */ 366 sbp->f_fresvd = 0; 367 copy_statvfs_info(sbp, mp); 368 return (0); 369 } 370 371 /* 372 * lookup an anode, check mount's hash table if not found, create 373 * return locked and referenced al la vget(vp, 1); 374 */ 375 int 376 adosfs_vget(struct mount *mp, ino_t an, struct vnode **vpp) 377 { 378 struct adosfsmount *amp; 379 struct vnode *vp; 380 struct anode *ap; 381 struct buf *bp; 382 char *nam, *tmp; 383 int namlen, error; 384 385 error = 0; 386 amp = VFSTOADOSFS(mp); 387 bp = NULL; 388 389 /* 390 * check hash table. we are done if found 391 */ 392 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 393 return (0); 394 395 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, NULL, &vp); 396 if (error) 397 return (error); 398 399 /* 400 * setup, insert in hash, and lock before io. 401 */ 402 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 403 memset(ap, 0, sizeof(struct anode)); 404 ap->vp = vp; 405 ap->amp = amp; 406 ap->block = an; 407 ap->nwords = amp->nwords; 408 genfs_node_init(vp, &adosfs_genfsops); 409 adosfs_ainshash(amp, ap); 410 411 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 412 amp->bsize, NOCRED, 0, &bp)) != 0) { 413 vput(vp); 414 return (error); 415 } 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 brelse(bp, 0); 470 vput(vp); 471 return (EINVAL); 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 brelse(bp, 0); 490 vput(vp); 491 return (EINVAL); 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, NOCRED, 0, &bp); 532 if (error) { 533 vput(vp); 534 return (error); 535 } 536 ap->fsize = adoswordn(bp, ap->nwords - 47); 537 /* 538 * Should ap->block be set to the real file header block? 539 */ 540 ap->block = ap->linkto; 541 } 542 543 if (ap->type == AROOT) { 544 ap->adprot = 15; 545 ap->uid = amp->uid; 546 ap->gid = amp->gid; 547 } else { 548 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 549 /* 550 * ADOS directories do not have a `x' protection bit as 551 * it is known in VFS; this functionality is fulfilled 552 * by the ADOS `r' bit. 553 * 554 * To retain the ADOS behaviour, fake execute permissions 555 * in that case. 556 */ 557 if ((ap->type == ADIR || ap->type == ALDIR) && 558 (ap->adprot & 0x00000008) == 0) 559 ap->adprot &= ~0x00000002; 560 561 /* 562 * Get uid/gid from extensions in file header 563 * (really need to know if this is a muFS partition) 564 */ 565 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 566 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 567 if (ap->uid || ap->gid) { 568 if (ap->uid == 0xffff) 569 ap->uid = 0; 570 if (ap->gid == 0xffff) 571 ap->gid = 0; 572 ap->adprot |= 0x40000000; /* Kludge */ 573 } 574 else { 575 /* 576 * uid & gid extension don't exist, 577 * so use the mount-point uid/gid 578 */ 579 ap->uid = amp->uid; 580 ap->gid = amp->gid; 581 } 582 } 583 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 584 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 585 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 586 587 *vpp = vp; 588 brelse(bp, 0); 589 uvm_vnp_setsize(vp, ap->fsize); 590 return (0); 591 } 592 593 /* 594 * Load the bitmap into memory, and count the number of available 595 * blocks. 596 * The bitmap will be released if the filesystem is read-only; it's 597 * only needed to find the free space. 598 */ 599 int 600 adosfs_loadbitmap(struct adosfsmount *amp) 601 { 602 struct buf *bp, *mapbp; 603 u_long bn; 604 int blkix, endix, mapix; 605 int bmsize; 606 int error; 607 608 bp = mapbp = NULL; 609 bn = amp->rootb; 610 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 611 NOCRED, 0, &bp)) != 0) { 612 return (error); 613 } 614 blkix = amp->nwords - 49; 615 endix = amp->nwords - 24; 616 mapix = 0; 617 bmsize = (amp->numblks + 31) / 32; 618 while (mapix < bmsize) { 619 int n; 620 u_long bits; 621 622 if (adoswordn(bp, blkix) == 0) 623 break; 624 if (mapbp != NULL) 625 brelse(mapbp, 0); 626 if ((error = bread(amp->devvp, 627 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 628 NOCRED, 0, &mapbp)) != 0) 629 break; 630 if (adoscksum(mapbp, amp->nwords)) { 631 #ifdef DIAGNOSTIC 632 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 633 adoswordn(bp, blkix)); 634 #endif 635 /* XXX Force read-only? Set free space 0? */ 636 break; 637 } 638 n = 1; 639 while (n < amp->nwords && mapix < bmsize) { 640 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 641 ++n; 642 if (mapix == bmsize && amp->numblks & 31) 643 bits &= ~(0xffffffff << (amp->numblks & 31)); 644 while (bits) { 645 if (bits & 1) 646 ++amp->freeblks; 647 bits >>= 1; 648 } 649 } 650 ++blkix; 651 if (mapix < bmsize && blkix == endix) { 652 bn = adoswordn(bp, blkix); 653 brelse(bp, 0); 654 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 655 amp->bsize, NOCRED, 0, &bp)) != 0) 656 break; 657 /* 658 * Why is there no checksum on these blocks? 659 */ 660 blkix = 0; 661 endix = amp->nwords - 1; 662 } 663 } 664 if (bp) 665 brelse(bp, 0); 666 if (mapbp) 667 brelse(mapbp, 0); 668 return (error); 669 } 670 671 672 /* 673 * File handle to vnode 674 * 675 * Have to be really careful about stale file handles: 676 * - check that the inode number is in range 677 * - call iget() to get the locked inode 678 * - check for an unallocated inode (i_mode == 0) 679 * - check that the generation number matches 680 */ 681 682 struct ifid { 683 ushort ifid_len; 684 ushort ifid_pad; 685 int ifid_ino; 686 long ifid_start; 687 }; 688 689 int 690 adosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 691 { 692 struct ifid ifh; 693 #if 0 694 struct anode *ap; 695 #endif 696 struct vnode *nvp; 697 int error; 698 699 if (fhp->fid_len != sizeof(struct ifid)) 700 return EINVAL; 701 702 #ifdef ADOSFS_DIAGNOSTIC 703 printf("adfhtovp(%p, %p, %p)\n", mp, fhp, vpp); 704 #endif 705 706 memcpy(&ifh, fhp, sizeof(ifh)); 707 708 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 709 *vpp = NULLVP; 710 return (error); 711 } 712 #if 0 713 ap = VTOA(nvp); 714 if (ap->inode.iso_mode == 0) { 715 vput(nvp); 716 *vpp = NULLVP; 717 return (ESTALE); 718 } 719 #endif 720 *vpp = nvp; 721 return(0); 722 } 723 724 int 725 adosfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 726 { 727 struct anode *ap = VTOA(vp); 728 struct ifid ifh; 729 730 if (*fh_size < sizeof(struct ifid)) { 731 *fh_size = sizeof(struct ifid); 732 return E2BIG; 733 } 734 *fh_size = sizeof(struct ifid); 735 736 memset(&ifh, 0, sizeof(ifh)); 737 ifh.ifid_len = sizeof(struct ifid); 738 ifh.ifid_ino = ap->block; 739 ifh.ifid_start = ap->block; 740 memcpy(fhp, &ifh, sizeof(ifh)); 741 742 #ifdef ADOSFS_DIAGNOSTIC 743 printf("advptofh(%p, %p)\n", vp, fhp); 744 #endif 745 return(0); 746 } 747 748 int 749 adosfs_sync(struct mount *mp, int waitfor, kauth_cred_t uc) 750 { 751 #ifdef ADOSFS_DIAGNOSTIC 752 printf("ad_sync(%p, %d)\n", mp, waitfor); 753 #endif 754 return(0); 755 } 756 757 void 758 adosfs_init(void) 759 { 760 761 malloc_type_attach(M_ANODE); 762 mutex_init(&adosfs_hashlock, MUTEX_DEFAULT, IPL_NONE); 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 mutex_destroy(&adosfs_hashlock); 773 malloc_type_detach(M_ANODE); 774 } 775 776 /* 777 * vfs generic function call table 778 */ 779 780 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 781 782 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 783 &adosfs_vnodeop_opv_desc, 784 NULL, 785 }; 786 787 struct vfsops adosfs_vfsops = { 788 MOUNT_ADOSFS, 789 sizeof (struct adosfs_args), 790 adosfs_mount, 791 adosfs_start, 792 adosfs_unmount, 793 adosfs_root, 794 (void *)eopnotsupp, /* vfs_quotactl */ 795 adosfs_statvfs, 796 adosfs_sync, 797 adosfs_vget, 798 adosfs_fhtovp, 799 adosfs_vptofh, 800 adosfs_init, 801 NULL, 802 adosfs_done, 803 NULL, /* vfs_mountroot */ 804 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 805 vfs_stdextattrctl, 806 (void *)eopnotsupp, /* vfs_suspendctl */ 807 genfs_renamelock_enter, 808 genfs_renamelock_exit, 809 (void *)eopnotsupp, 810 adosfs_vnodeopv_descs, 811 0, 812 { NULL, NULL }, 813 }; 814 815 static int 816 adosfs_modcmd(modcmd_t cmd, void *arg) 817 { 818 int error; 819 820 switch (cmd) { 821 case MODULE_CMD_INIT: 822 error = vfs_attach(&adosfs_vfsops); 823 if (error != 0) 824 break; 825 sysctl_createv(&adosfs_sysctl_log, 0, NULL, NULL, 826 CTLFLAG_PERMANENT, 827 CTLTYPE_NODE, "vfs", NULL, 828 NULL, 0, NULL, 0, 829 CTL_VFS, CTL_EOL); 830 sysctl_createv(&adosfs_sysctl_log, 0, NULL, NULL, 831 CTLFLAG_PERMANENT, 832 CTLTYPE_NODE, "adosfs", 833 SYSCTL_DESCR("AmigaDOS file system"), 834 NULL, 0, NULL, 0, 835 CTL_VFS, 16, CTL_EOL); 836 /* 837 * XXX the "16" above could be dynamic, thereby eliminating 838 * one more instance of the "number to vfs" mapping problem, 839 * but "16" is the order as taken from sys/mount.h 840 */ 841 break; 842 case MODULE_CMD_FINI: 843 error = vfs_detach(&adosfs_vfsops); 844 if (error != 0) 845 break; 846 sysctl_teardown(&adosfs_sysctl_log); 847 break; 848 default: 849 error = ENOTTY; 850 break; 851 } 852 853 return (error); 854 } 855
Indexes created Wed Sep 24 05:09:52 GMT 2025