advfsops.c revision 1.49
1 /* $NetBSD: advfsops.c,v 1.49 2008/02/05 15:18:36 ad 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 1.49 2008/02/05 15:18:36 ad 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 <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> /* XXX */ 53 #include <sys/fcntl.h> 54 #include <sys/namei.h> 55 #include <sys/ioctl.h> 56 #include <sys/queue.h> 57 #include <sys/buf.h> 58 #include <sys/conf.h> 59 #include <sys/kauth.h> 60 #include <sys/simplelock.h> 61 #include <fs/adosfs/adosfs.h> 62 63 VFS_PROTOS(adosfs); 64 65 int adosfs_mountfs __P((struct vnode *, struct mount *, struct lwp *)); 66 int adosfs_loadbitmap __P((struct adosfsmount *)); 67 68 struct simplelock adosfs_hashlock; 69 70 struct pool adosfs_node_pool; 71 72 MALLOC_JUSTDEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 73 MALLOC_JUSTDEFINE(M_ANODE, "adosfs anode","adosfs anode structures and tables"); 74 MALLOC_JUSTDEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 75 76 static const struct genfs_ops adosfs_genfsops = { 77 .gop_size = genfs_size, 78 }; 79 80 int (**adosfs_vnodeop_p) __P((void *)); 81 82 int 83 adosfs_mount(mp, path, data, data_len) 84 struct mount *mp; 85 const char *path; 86 void *data; 87 size_t *data_len; 88 { 89 struct lwp *l = curlwp; 90 struct nameidata nd; 91 struct vnode *devvp; 92 struct adosfs_args *args = data; 93 struct adosfsmount *amp; 94 int error; 95 mode_t accessmode; 96 97 if (*data_len < sizeof *args) 98 return EINVAL; 99 100 if (mp->mnt_flag & MNT_GETARGS) { 101 amp = VFSTOADOSFS(mp); 102 if (amp == NULL) 103 return EIO; 104 args->uid = amp->uid; 105 args->gid = amp->gid; 106 args->mask = amp->mask; 107 args->fspec = NULL; 108 *data_len = sizeof *args; 109 return 0; 110 } 111 112 if ((mp->mnt_flag & MNT_RDONLY) == 0) 113 return (EROFS); 114 115 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 116 return EOPNOTSUPP; 117 118 /* 119 * Not an update, or updating the name: look up the name 120 * and verify that it refers to a sensible block device. 121 */ 122 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 123 if ((error = namei(&nd)) != 0) 124 return (error); 125 devvp = nd.ni_vp; 126 127 if (devvp->v_type != VBLK) { 128 vrele(devvp); 129 return (ENOTBLK); 130 } 131 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 132 vrele(devvp); 133 return (ENXIO); 134 } 135 /* 136 * If mount by non-root, then verify that user has necessary 137 * permissions on the device. 138 */ 139 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 140 accessmode = VREAD; 141 if ((mp->mnt_flag & MNT_RDONLY) == 0) 142 accessmode |= VWRITE; 143 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 144 error = VOP_ACCESS(devvp, accessmode, l->l_cred); 145 if (error) { 146 vput(devvp); 147 return (error); 148 } 149 VOP_UNLOCK(devvp, 0); 150 } 151 /* MNT_UPDATE? */ 152 if ((error = adosfs_mountfs(devvp, mp, l)) != 0) { 153 vrele(devvp); 154 return (error); 155 } 156 amp = VFSTOADOSFS(mp); 157 amp->uid = args->uid; 158 amp->gid = args->gid; 159 amp->mask = args->mask; 160 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 161 mp->mnt_op->vfs_name, mp, l); 162 } 163 164 int 165 adosfs_mountfs(devvp, mp, l) 166 struct vnode *devvp; 167 struct mount *mp; 168 struct lwp *l; 169 { 170 struct disklabel dl; 171 struct partition *parp; 172 struct adosfsmount *amp; 173 struct buf *bp; 174 struct vnode *rvp; 175 int error, part, i; 176 177 part = DISKPART(devvp->v_rdev); 178 amp = NULL; 179 180 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 181 return (error); 182 183 /* 184 * open blkdev and read root block 185 */ 186 if ((error = VOP_OPEN(devvp, FREAD, NOCRED)) != 0) 187 return (error); 188 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED); 189 if (error) 190 goto fail; 191 192 parp = &dl.d_partitions[part]; 193 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 194 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 195 amp->mp = mp; 196 if (dl.d_type == DTYPE_FLOPPY) { 197 amp->bsize = dl.d_secsize; 198 amp->secsperblk = 1; 199 } 200 else { 201 amp->bsize = parp->p_fsize * parp->p_frag; 202 amp->secsperblk = parp->p_frag; 203 } 204 205 /* invalid fs ? */ 206 if (amp->secsperblk == 0) { 207 error = EINVAL; 208 goto fail; 209 } 210 211 bp = NULL; 212 if ((error = bread(devvp, (daddr_t)BBOFF, 213 amp->bsize, NOCRED, &bp)) != 0) { 214 brelse(bp, 0); 215 goto fail; 216 } 217 amp->dostype = adoswordn(bp, 0); 218 brelse(bp, 0); 219 220 /* basic sanity checks */ 221 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 222 error = EINVAL; 223 goto fail; 224 } 225 226 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 227 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 228 229 amp->nwords = amp->bsize >> 2; 230 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 231 amp->devvp = devvp; 232 233 mp->mnt_data = amp; 234 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 235 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_ADOSFS); 236 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 237 mp->mnt_stat.f_namemax = ADMAXNAMELEN; 238 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 239 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 240 mp->mnt_flag |= MNT_LOCAL; 241 242 /* 243 * init anode table. 244 */ 245 for (i = 0; i < ANODEHASHSZ; i++) 246 LIST_INIT(&->anodetab[i]); 247 248 /* 249 * get the root anode, if not a valid fs this will fail. 250 */ 251 if ((error = VFS_ROOT(mp, &rvp)) != 0) 252 goto fail; 253 /* allocate and load bitmap, set free space */ 254 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 255 M_ADOSFSBITMAP, M_WAITOK); 256 if (amp->bitmap) 257 adosfs_loadbitmap(amp); 258 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 259 /* 260 * Don't need the bitmap any more if it's read-only. 261 */ 262 free(amp->bitmap, M_ADOSFSBITMAP); 263 amp->bitmap = NULL; 264 } 265 vput(rvp); 266 267 return(0); 268 269 fail: 270 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 271 (void) VOP_CLOSE(devvp, FREAD, NOCRED); 272 VOP_UNLOCK(devvp, 0); 273 if (amp && amp->bitmap) 274 free(amp->bitmap, M_ADOSFSBITMAP); 275 if (amp) 276 free(amp, M_ADOSFSMNT); 277 return (error); 278 } 279 280 int 281 adosfs_start(mp, flags) 282 struct mount *mp; 283 int flags; 284 { 285 286 return (0); 287 } 288 289 int 290 adosfs_unmount(mp, mntflags) 291 struct mount *mp; 292 int mntflags; 293 { 294 struct adosfsmount *amp; 295 int error, flags; 296 297 flags = 0; 298 if (mntflags & MNT_FORCE) 299 flags |= FORCECLOSE; 300 if ((error = vflush(mp, NULLVP, flags)) != 0) 301 return (error); 302 amp = VFSTOADOSFS(mp); 303 if (amp->devvp->v_type != VBAD) 304 amp->devvp->v_specmountpoint = NULL; 305 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 306 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED); 307 vput(amp->devvp); 308 if (amp->bitmap) 309 free(amp->bitmap, M_ADOSFSBITMAP); 310 free(amp, M_ADOSFSMNT); 311 mp->mnt_data = NULL; 312 mp->mnt_flag &= ~MNT_LOCAL; 313 return (error); 314 } 315 316 int 317 adosfs_root(mp, vpp) 318 struct mount *mp; 319 struct vnode **vpp; 320 { 321 struct vnode *nvp; 322 int error; 323 324 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 325 return (error); 326 /* XXX verify it's a root block? */ 327 *vpp = nvp; 328 return (0); 329 } 330 331 int 332 adosfs_statvfs(mp, sbp) 333 struct mount *mp; 334 struct statvfs *sbp; 335 { 336 struct adosfsmount *amp; 337 338 amp = VFSTOADOSFS(mp); 339 sbp->f_bsize = amp->bsize; 340 sbp->f_frsize = amp->bsize; 341 sbp->f_iosize = amp->dbsize; 342 sbp->f_blocks = amp->numblks; 343 sbp->f_bfree = amp->freeblks; 344 sbp->f_bavail = amp->freeblks; 345 sbp->f_bresvd = 0; 346 sbp->f_files = 0; /* who knows */ 347 sbp->f_ffree = 0; /* " " */ 348 sbp->f_favail = 0; /* " " */ 349 sbp->f_fresvd = 0; 350 copy_statvfs_info(sbp, mp); 351 return (0); 352 } 353 354 /* 355 * lookup an anode, check mount's hash table if not found, create 356 * return locked and referenced al la vget(vp, 1); 357 */ 358 int 359 adosfs_vget(mp, an, vpp) 360 struct mount *mp; 361 ino_t an; 362 struct vnode **vpp; 363 { 364 struct adosfsmount *amp; 365 struct vnode *vp; 366 struct anode *ap; 367 struct buf *bp; 368 char *nam, *tmp; 369 int namlen, error; 370 371 error = 0; 372 amp = VFSTOADOSFS(mp); 373 bp = NULL; 374 375 /* 376 * check hash table. we are done if found 377 */ 378 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 379 return (0); 380 381 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 382 if (error) 383 return (error); 384 385 /* 386 * setup, insert in hash, and lock before io. 387 */ 388 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 389 memset(ap, 0, sizeof(struct anode)); 390 ap->vp = vp; 391 ap->amp = amp; 392 ap->block = an; 393 ap->nwords = amp->nwords; 394 genfs_node_init(vp, &adosfs_genfsops); 395 adosfs_ainshash(amp, ap); 396 397 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 398 amp->bsize, NOCRED, &bp)) != 0) { 399 brelse(bp, 0); 400 vput(vp); 401 return (error); 402 } 403 404 /* 405 * get type and fill rest in based on that. 406 */ 407 switch (ap->type = adosfs_getblktype(amp, bp)) { 408 case AROOT: 409 vp->v_type = VDIR; 410 vp->v_vflag |= VV_ROOT; 411 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 412 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 413 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 414 ap->created.days = adoswordn(bp, ap->nwords - 7); 415 ap->created.mins = adoswordn(bp, ap->nwords - 6); 416 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 417 break; 418 case ALDIR: 419 case ADIR: 420 vp->v_type = VDIR; 421 break; 422 case ALFILE: 423 case AFILE: 424 vp->v_type = VREG; 425 ap->fsize = adoswordn(bp, ap->nwords - 47); 426 break; 427 case ASLINK: /* XXX soft link */ 428 vp->v_type = VLNK; 429 /* 430 * convert from BCPL string and 431 * from: "part:dir/file" to: "/part/dir/file" 432 */ 433 nam = (char *)bp->b_data + (6 * sizeof(long)); 434 namlen = strlen(nam); 435 tmp = nam; 436 while (*tmp && *tmp != ':') 437 tmp++; 438 if (*tmp == 0) { 439 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 440 memcpy(ap->slinkto, nam, namlen); 441 } else if (*nam == ':') { 442 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 443 memcpy(ap->slinkto, nam, namlen); 444 ap->slinkto[0] = '/'; 445 } else { 446 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 447 ap->slinkto[0] = '/'; 448 memcpy(&ap->slinkto[1], nam, namlen); 449 ap->slinkto[tmp - nam + 1] = '/'; 450 namlen++; 451 } 452 ap->slinkto[namlen] = 0; 453 ap->fsize = namlen; 454 break; 455 default: 456 brelse(bp, 0); 457 vput(vp); 458 return (EINVAL); 459 } 460 461 /* 462 * Get appropriate data from this block; hard link needs 463 * to get other data from the "real" block. 464 */ 465 466 /* 467 * copy in name (from original block) 468 */ 469 nam = (char *)bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 470 namlen = *(u_char *)nam++; 471 if (namlen > 30) { 472 #ifdef DIAGNOSTIC 473 printf("adosfs: aget: name length too long blk %llu\n", 474 (unsigned long long)an); 475 #endif 476 brelse(bp, 0); 477 vput(vp); 478 return (EINVAL); 479 } 480 memcpy(ap->name, nam, namlen); 481 ap->name[namlen] = 0; 482 483 /* 484 * if dir alloc hash table and copy it in 485 */ 486 if (vp->v_type == VDIR) { 487 int i; 488 489 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 490 ap->ntabent = ANODETABENT(ap); 491 ap->tabi = (int *)&ap->tab[ap->ntabent]; 492 memset(ap->tabi, 0, ANODETABSZ(ap)); 493 for (i = 0; i < ap->ntabent; i++) 494 ap->tab[i] = adoswordn(bp, i + 6); 495 } 496 497 /* 498 * misc. 499 */ 500 ap->pblock = adoswordn(bp, ap->nwords - 3); 501 ap->hashf = adoswordn(bp, ap->nwords - 4); 502 ap->linknext = adoswordn(bp, ap->nwords - 10); 503 ap->linkto = adoswordn(bp, ap->nwords - 11); 504 505 /* 506 * setup last indirect block cache. 507 */ 508 ap->lastlindblk = 0; 509 if (ap->type == AFILE) { 510 ap->lastindblk = ap->block; 511 if (adoswordn(bp, ap->nwords - 10)) 512 ap->linkto = ap->block; 513 } else if (ap->type == ALFILE) { 514 ap->lastindblk = ap->linkto; 515 brelse(bp, 0); 516 bp = NULL; 517 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 518 amp->bsize, NOCRED, &bp); 519 if (error) { 520 brelse(bp, 0); 521 vput(vp); 522 return (error); 523 } 524 ap->fsize = adoswordn(bp, ap->nwords - 47); 525 /* 526 * Should ap->block be set to the real file header block? 527 */ 528 ap->block = ap->linkto; 529 } 530 531 if (ap->type == AROOT) { 532 ap->adprot = 15; 533 ap->uid = amp->uid; 534 ap->gid = amp->gid; 535 } else { 536 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 537 /* 538 * ADOS directories do not have a `x' protection bit as 539 * it is known in VFS; this functionality is fulfilled 540 * by the ADOS `r' bit. 541 * 542 * To retain the ADOS behaviour, fake execute permissions 543 * in that case. 544 */ 545 if ((ap->type == ADIR || ap->type == ALDIR) && 546 (ap->adprot & 0x00000008) == 0) 547 ap->adprot &= ~0x00000002; 548 549 /* 550 * Get uid/gid from extensions in file header 551 * (really need to know if this is a muFS partition) 552 */ 553 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 554 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 555 if (ap->uid || ap->gid) { 556 if (ap->uid == 0xffff) 557 ap->uid = 0; 558 if (ap->gid == 0xffff) 559 ap->gid = 0; 560 ap->adprot |= 0x40000000; /* Kludge */ 561 } 562 else { 563 /* 564 * uid & gid extension don't exist, 565 * so use the mount-point uid/gid 566 */ 567 ap->uid = amp->uid; 568 ap->gid = amp->gid; 569 } 570 } 571 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 572 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 573 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 574 575 *vpp = vp; 576 brelse(bp, 0); 577 uvm_vnp_setsize(vp, ap->fsize); 578 return (0); 579 } 580 581 /* 582 * Load the bitmap into memory, and count the number of available 583 * blocks. 584 * The bitmap will be released if the filesystem is read-only; it's 585 * only needed to find the free space. 586 */ 587 int 588 adosfs_loadbitmap(amp) 589 struct adosfsmount *amp; 590 { 591 struct buf *bp, *mapbp; 592 u_long bn; 593 int blkix, endix, mapix; 594 int bmsize; 595 int error; 596 597 bp = mapbp = NULL; 598 bn = amp->rootb; 599 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 600 NOCRED, &bp)) != 0) { 601 brelse(bp, 0); 602 return (error); 603 } 604 blkix = amp->nwords - 49; 605 endix = amp->nwords - 24; 606 mapix = 0; 607 bmsize = (amp->numblks + 31) / 32; 608 while (mapix < bmsize) { 609 int n; 610 u_long bits; 611 612 if (adoswordn(bp, blkix) == 0) 613 break; 614 if (mapbp != NULL) 615 brelse(mapbp, 0); 616 if ((error = bread(amp->devvp, 617 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 618 NOCRED, &mapbp)) != 0) 619 break; 620 if (adoscksum(mapbp, amp->nwords)) { 621 #ifdef DIAGNOSTIC 622 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 623 adoswordn(bp, blkix)); 624 #endif 625 /* XXX Force read-only? Set free space 0? */ 626 break; 627 } 628 n = 1; 629 while (n < amp->nwords && mapix < bmsize) { 630 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 631 ++n; 632 if (mapix == bmsize && amp->numblks & 31) 633 bits &= ~(0xffffffff << (amp->numblks & 31)); 634 while (bits) { 635 if (bits & 1) 636 ++amp->freeblks; 637 bits >>= 1; 638 } 639 } 640 ++blkix; 641 if (mapix < bmsize && blkix == endix) { 642 bn = adoswordn(bp, blkix); 643 brelse(bp, 0); 644 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 645 amp->bsize, NOCRED, &bp)) != 0) 646 break; 647 /* 648 * Why is there no checksum on these blocks? 649 */ 650 blkix = 0; 651 endix = amp->nwords - 1; 652 } 653 } 654 if (bp) 655 brelse(bp, 0); 656 if (mapbp) 657 brelse(mapbp, 0); 658 return (error); 659 } 660 661 662 /* 663 * File handle to vnode 664 * 665 * Have to be really careful about stale file handles: 666 * - check that the inode number is in range 667 * - call iget() to get the locked inode 668 * - check for an unallocated inode (i_mode == 0) 669 * - check that the generation number matches 670 */ 671 672 struct ifid { 673 ushort ifid_len; 674 ushort ifid_pad; 675 int ifid_ino; 676 long ifid_start; 677 }; 678 679 int 680 adosfs_fhtovp(mp, fhp, vpp) 681 struct mount *mp; 682 struct fid *fhp; 683 struct vnode **vpp; 684 { 685 struct ifid ifh; 686 #if 0 687 struct anode *ap; 688 #endif 689 struct vnode *nvp; 690 int error; 691 692 if (fhp->fid_len != sizeof(struct ifid)) 693 return EINVAL; 694 695 #ifdef ADOSFS_DIAGNOSTIC 696 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 697 #endif 698 699 memcpy(&ifh, fhp, sizeof(ifh)); 700 701 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 702 *vpp = NULLVP; 703 return (error); 704 } 705 #if 0 706 ap = VTOA(nvp); 707 if (ap->inode.iso_mode == 0) { 708 vput(nvp); 709 *vpp = NULLVP; 710 return (ESTALE); 711 } 712 #endif 713 *vpp = nvp; 714 return(0); 715 } 716 717 int 718 adosfs_vptofh(vp, fhp, fh_size) 719 struct vnode *vp; 720 struct fid *fhp; 721 size_t *fh_size; 722 { 723 struct anode *ap = VTOA(vp); 724 struct ifid ifh; 725 726 if (*fh_size < sizeof(struct ifid)) { 727 *fh_size = sizeof(struct ifid); 728 return E2BIG; 729 } 730 *fh_size = sizeof(struct ifid); 731 732 memset(&ifh, 0, sizeof(ifh)); 733 ifh.ifid_len = sizeof(struct ifid); 734 ifh.ifid_ino = ap->block; 735 ifh.ifid_start = ap->block; 736 memcpy(fhp, &ifh, sizeof(ifh)); 737 738 #ifdef ADOSFS_DIAGNOSTIC 739 printf("advptofh(%x, %x)\n", vp, fhp); 740 #endif 741 return(0); 742 } 743 744 int 745 adosfs_sync(mp, waitfor, uc) 746 struct mount *mp; 747 int waitfor; 748 kauth_cred_t uc; 749 { 750 #ifdef ADOSFS_DIAGNOSTIC 751 printf("ad_sync(%x, %x)\n", mp, waitfor); 752 #endif 753 return(0); 754 } 755 756 void 757 adosfs_init() 758 { 759 760 malloc_type_attach(M_ADOSFSMNT); 761 malloc_type_attach(M_ANODE); 762 malloc_type_attach(M_ADOSFSBITMAP); 763 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, "adosndpl", 764 &pool_allocator_nointr, IPL_NONE); 765 simple_lock_init(&adosfs_hashlock); 766 } 767 768 void 769 adosfs_done() 770 { 771 772 pool_destroy(&adosfs_node_pool); 773 malloc_type_detach(M_ADOSFSBITMAP); 774 malloc_type_detach(M_ANODE); 775 malloc_type_detach(M_ADOSFSMNT); 776 } 777 778 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 779 { 780 781 sysctl_createv(clog, 0, NULL, NULL, 782 CTLFLAG_PERMANENT, 783 CTLTYPE_NODE, "vfs", NULL, 784 NULL, 0, NULL, 0, 785 CTL_VFS, CTL_EOL); 786 sysctl_createv(clog, 0, NULL, NULL, 787 CTLFLAG_PERMANENT, 788 CTLTYPE_NODE, "adosfs", 789 SYSCTL_DESCR("AmigaDOS file system"), 790 NULL, 0, NULL, 0, 791 CTL_VFS, 16, CTL_EOL); 792 /* 793 * XXX the "16" above could be dynamic, thereby eliminating 794 * one more instance of the "number to vfs" mapping problem, 795 * but "16" is the order as taken from sys/mount.h 796 */ 797 } 798 799 /* 800 * vfs generic function call table 801 */ 802 803 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 804 805 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 806 &adosfs_vnodeop_opv_desc, 807 NULL, 808 }; 809 810 struct vfsops adosfs_vfsops = { 811 MOUNT_ADOSFS, 812 sizeof (struct adosfs_args), 813 adosfs_mount, 814 adosfs_start, 815 adosfs_unmount, 816 adosfs_root, 817 (void *)eopnotsupp, /* vfs_quotactl */ 818 adosfs_statvfs, 819 adosfs_sync, 820 adosfs_vget, 821 adosfs_fhtovp, 822 adosfs_vptofh, 823 adosfs_init, 824 NULL, 825 adosfs_done, 826 NULL, /* vfs_mountroot */ 827 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 828 vfs_stdextattrctl, 829 (void *)eopnotsupp, /* vfs_suspendctl */ 830 genfs_renamelock_enter, 831 genfs_renamelock_exit, 832 adosfs_vnodeopv_descs, 833 0, 834 { NULL, NULL }, 835 }; 836 VFS_ATTACH(adosfs_vfsops); 837
Indexes created Tue Sep 23 23:09:58 GMT 2025