advfsops.c revision 1.9
1 /* $NetBSD: advfsops.c,v 1.9 2003/12/04 19:38:23 atatat 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 1.9 2003/12/04 19:38:23 atatat 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/specfs/specdev.h> /* XXX */ 52 #include <sys/fcntl.h> 53 #include <sys/namei.h> 54 #include <sys/ioctl.h> 55 #include <sys/queue.h> 56 #include <sys/buf.h> 57 #include <sys/conf.h> 58 #include <fs/adosfs/adosfs.h> 59 60 void adosfs_init __P((void)); 61 void adosfs_reinit __P((void)); 62 void adosfs_done __P((void)); 63 int adosfs_mount __P((struct mount *, const char *, void *, struct nameidata *, 64 struct proc *)); 65 int adosfs_start __P((struct mount *, int, struct proc *)); 66 int adosfs_unmount __P((struct mount *, int, struct proc *)); 67 int adosfs_root __P((struct mount *, struct vnode **)); 68 int adosfs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *)); 69 int adosfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 70 int adosfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 71 int adosfs_vget __P((struct mount *, ino_t, struct vnode **)); 72 int adosfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 73 int adosfs_checkexp __P((struct mount *, struct mbuf *, int *, 74 struct ucred **)); 75 int adosfs_vptofh __P((struct vnode *, struct fid *)); 76 77 int adosfs_mountfs __P((struct vnode *, struct mount *, struct proc *)); 78 int adosfs_loadbitmap __P((struct adosfsmount *)); 79 80 struct simplelock adosfs_hashlock; 81 82 struct pool adosfs_node_pool; 83 84 MALLOC_DEFINE(M_ADOSFSMNT, "adosfs mount", "adosfs mount structures"); 85 MALLOC_DEFINE(M_ANODE, "adosfs anode", "adosfs anode structures and tables"); 86 MALLOC_DEFINE(M_ADOSFSBITMAP, "adosfs bitmap", "adosfs bitmap"); 87 88 struct genfs_ops adosfs_genfsops = { 89 genfs_size, 90 }; 91 92 int (**adosfs_vnodeop_p) __P((void *)); 93 94 int 95 adosfs_mount(mp, path, data, ndp, p) 96 struct mount *mp; 97 const char *path; 98 void *data; 99 struct nameidata *ndp; 100 struct proc *p; 101 { 102 struct vnode *devvp; 103 struct adosfs_args args; 104 struct adosfsmount *amp; 105 int error; 106 mode_t accessmode; 107 108 if (mp->mnt_flag & MNT_GETARGS) { 109 amp = VFSTOADOSFS(mp); 110 if (amp == NULL) 111 return EIO; 112 args.uid = amp->uid; 113 args.gid = amp->gid; 114 args.mask = amp->mask; 115 args.fspec = NULL; 116 vfs_showexport(mp, &args.export, &->export); 117 return copyout(&args, data, sizeof(args)); 118 } 119 error = copyin(data, &args, sizeof(struct adosfs_args)); 120 if (error) 121 return(error); 122 123 if ((mp->mnt_flag & MNT_RDONLY) == 0) 124 return (EROFS); 125 /* 126 * If updating, check whether changing from read-only to 127 * read/write; if there is no device name, that's all we do. 128 */ 129 if (mp->mnt_flag & MNT_UPDATE) { 130 amp = VFSTOADOSFS(mp); 131 if (args.fspec == 0) 132 return (vfs_export(mp, &->export, &args.export)); 133 } 134 /* 135 * Not an update, or updating the name: look up the name 136 * and verify that it refers to a sensible block device. 137 */ 138 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 139 if ((error = namei(ndp)) != 0) 140 return (error); 141 devvp = ndp->ni_vp; 142 143 if (devvp->v_type != VBLK) { 144 vrele(devvp); 145 return (ENOTBLK); 146 } 147 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 148 vrele(devvp); 149 return (ENXIO); 150 } 151 /* 152 * If mount by non-root, then verify that user has necessary 153 * permissions on the device. 154 */ 155 if (p->p_ucred->cr_uid != 0) { 156 accessmode = VREAD; 157 if ((mp->mnt_flag & MNT_RDONLY) == 0) 158 accessmode |= VWRITE; 159 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 160 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 161 if (error) { 162 vput(devvp); 163 return (error); 164 } 165 VOP_UNLOCK(devvp, 0); 166 } 167 /* MNT_UPDATE? */ 168 if ((error = adosfs_mountfs(devvp, mp, p)) != 0) { 169 vrele(devvp); 170 return (error); 171 } 172 amp = VFSTOADOSFS(mp); 173 amp->uid = args.uid; 174 amp->gid = args.gid; 175 amp->mask = args.mask; 176 return set_statfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 177 mp, p); 178 } 179 180 int 181 adosfs_mountfs(devvp, mp, p) 182 struct vnode *devvp; 183 struct mount *mp; 184 struct proc *p; 185 { 186 struct disklabel dl; 187 struct partition *parp; 188 struct adosfsmount *amp; 189 struct buf *bp; 190 struct vnode *rvp; 191 int error, part, i; 192 193 part = DISKPART(devvp->v_rdev); 194 amp = NULL; 195 196 /* 197 * Disallow multiple mounts of the same device. 198 * Disallow mounting of a device that is currently in use 199 * (except for root, which might share swap device for miniroot). 200 * Flush out any old buffers remaining from a previous use. 201 */ 202 if ((error = vfs_mountedon(devvp)) != 0) 203 return (error); 204 if (vcount(devvp) > 1 && devvp != rootvp) 205 return (EBUSY); 206 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 207 return (error); 208 209 /* 210 * open blkdev and read root block 211 */ 212 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, p)) != 0) 213 return (error); 214 error = VOP_IOCTL(devvp, DIOCGDINFO, &dl, FREAD, NOCRED, p); 215 if (error) 216 goto fail; 217 218 parp = &dl.d_partitions[part]; 219 amp = malloc(sizeof(struct adosfsmount), M_ADOSFSMNT, M_WAITOK); 220 memset((char *)amp, 0, (u_long)sizeof(struct adosfsmount)); 221 amp->mp = mp; 222 if (dl.d_type == DTYPE_FLOPPY) { 223 amp->bsize = dl.d_secsize; 224 amp->secsperblk = 1; 225 } 226 else { 227 amp->bsize = parp->p_fsize * parp->p_frag; 228 amp->secsperblk = parp->p_frag; 229 } 230 231 /* invalid fs ? */ 232 if (amp->secsperblk == 0) { 233 error = EINVAL; 234 goto fail; 235 } 236 237 bp = NULL; 238 if ((error = bread(devvp, (daddr_t)BBOFF, 239 amp->bsize, NOCRED, &bp)) != 0) { 240 brelse(bp); 241 goto fail; 242 } 243 amp->dostype = adoswordn(bp, 0); 244 brelse(bp); 245 246 /* basic sanity checks */ 247 if (amp->dostype < 0x444f5300 || amp->dostype > 0x444f5305) { 248 error = EINVAL; 249 goto fail; 250 } 251 252 amp->rootb = (parp->p_size / amp->secsperblk - 1 + parp->p_cpg) >> 1; 253 amp->numblks = parp->p_size / amp->secsperblk - parp->p_cpg; 254 255 amp->nwords = amp->bsize >> 2; 256 amp->dbsize = amp->bsize - (IS_FFS(amp) ? 0 : OFS_DATA_OFFSET); 257 amp->devvp = devvp; 258 259 mp->mnt_data = amp; 260 mp->mnt_stat.f_fsid.val[0] = (long)devvp->v_rdev; 261 mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_ADOSFS); 262 mp->mnt_fs_bshift = ffs(amp->bsize) - 1; 263 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 264 mp->mnt_flag |= MNT_LOCAL; 265 266 /* 267 * init anode table. 268 */ 269 for (i = 0; i < ANODEHASHSZ; i++) 270 LIST_INIT(&->anodetab[i]); 271 272 /* 273 * get the root anode, if not a valid fs this will fail. 274 */ 275 if ((error = VFS_ROOT(mp, &rvp)) != 0) 276 goto fail; 277 /* allocate and load bitmap, set free space */ 278 amp->bitmap = malloc(((amp->numblks + 31) / 32) * sizeof(*amp->bitmap), 279 M_ADOSFSBITMAP, M_WAITOK); 280 if (amp->bitmap) 281 adosfs_loadbitmap(amp); 282 if (mp->mnt_flag & MNT_RDONLY && amp->bitmap) { 283 /* 284 * Don't need the bitmap any more if it's read-only. 285 */ 286 free(amp->bitmap, M_ADOSFSBITMAP); 287 amp->bitmap = NULL; 288 } 289 vput(rvp); 290 291 return(0); 292 293 fail: 294 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 295 (void) VOP_CLOSE(devvp, FREAD, NOCRED, p); 296 VOP_UNLOCK(devvp, 0); 297 if (amp && amp->bitmap) 298 free(amp->bitmap, M_ADOSFSBITMAP); 299 if (amp) 300 free(amp, M_ADOSFSMNT); 301 return (error); 302 } 303 304 int 305 adosfs_start(mp, flags, p) 306 struct mount *mp; 307 int flags; 308 struct proc *p; 309 { 310 311 return (0); 312 } 313 314 int 315 adosfs_unmount(mp, mntflags, p) 316 struct mount *mp; 317 int mntflags; 318 struct proc *p; 319 { 320 struct adosfsmount *amp; 321 int error, flags; 322 323 flags = 0; 324 if (mntflags & MNT_FORCE) 325 flags |= FORCECLOSE; 326 if ((error = vflush(mp, NULLVP, flags)) != 0) 327 return (error); 328 amp = VFSTOADOSFS(mp); 329 if (amp->devvp->v_type != VBAD) 330 amp->devvp->v_specmountpoint = NULL; 331 vn_lock(amp->devvp, LK_EXCLUSIVE | LK_RETRY); 332 error = VOP_CLOSE(amp->devvp, FREAD, NOCRED, p); 333 vput(amp->devvp); 334 if (amp->bitmap) 335 free(amp->bitmap, M_ADOSFSBITMAP); 336 free(amp, M_ADOSFSMNT); 337 mp->mnt_data = NULL; 338 mp->mnt_flag &= ~MNT_LOCAL; 339 return (error); 340 } 341 342 int 343 adosfs_root(mp, vpp) 344 struct mount *mp; 345 struct vnode **vpp; 346 { 347 struct vnode *nvp; 348 int error; 349 350 if ((error = VFS_VGET(mp, (ino_t)VFSTOADOSFS(mp)->rootb, &nvp)) != 0) 351 return (error); 352 /* XXX verify it's a root block? */ 353 *vpp = nvp; 354 return (0); 355 } 356 357 int 358 adosfs_statfs(mp, sbp, p) 359 struct mount *mp; 360 struct statfs *sbp; 361 struct proc *p; 362 { 363 struct adosfsmount *amp; 364 365 amp = VFSTOADOSFS(mp); 366 #ifdef COMPAT_09 367 sbp->f_type = 16; 368 #else 369 sbp->f_type = 0; 370 #endif 371 sbp->f_bsize = amp->bsize; 372 sbp->f_iosize = amp->dbsize; 373 sbp->f_blocks = amp->numblks; 374 sbp->f_bfree = amp->freeblks; 375 sbp->f_bavail = amp->freeblks; 376 sbp->f_files = 0; /* who knows */ 377 sbp->f_ffree = 0; /* " " */ 378 copy_statfs_info(sbp, mp); 379 return (0); 380 } 381 382 /* 383 * lookup an anode, check mount's hash table if not found, create 384 * return locked and referenced al la vget(vp, 1); 385 */ 386 int 387 adosfs_vget(mp, an, vpp) 388 struct mount *mp; 389 ino_t an; 390 struct vnode **vpp; 391 { 392 struct adosfsmount *amp; 393 struct vnode *vp; 394 struct anode *ap; 395 struct buf *bp; 396 char *nam, *tmp; 397 int namlen, error; 398 399 error = 0; 400 amp = VFSTOADOSFS(mp); 401 bp = NULL; 402 403 /* 404 * check hash table. we are done if found 405 */ 406 if ((*vpp = adosfs_ahashget(mp, an)) != NULL) 407 return (0); 408 409 error = getnewvnode(VT_ADOSFS, mp, adosfs_vnodeop_p, &vp); 410 if (error) 411 return (error); 412 413 /* 414 * setup, insert in hash, and lock before io. 415 */ 416 vp->v_data = ap = pool_get(&adosfs_node_pool, PR_WAITOK); 417 memset(ap, 0, sizeof(struct anode)); 418 ap->vp = vp; 419 ap->amp = amp; 420 ap->block = an; 421 ap->nwords = amp->nwords; 422 adosfs_ainshash(amp, ap); 423 424 if ((error = bread(amp->devvp, an * amp->bsize / DEV_BSIZE, 425 amp->bsize, NOCRED, &bp)) != 0) { 426 brelse(bp); 427 vput(vp); 428 return (error); 429 } 430 431 /* 432 * get type and fill rest in based on that. 433 */ 434 switch (ap->type = adosfs_getblktype(amp, bp)) { 435 case AROOT: 436 vp->v_type = VDIR; 437 vp->v_flag |= VROOT; 438 ap->mtimev.days = adoswordn(bp, ap->nwords - 10); 439 ap->mtimev.mins = adoswordn(bp, ap->nwords - 9); 440 ap->mtimev.ticks = adoswordn(bp, ap->nwords - 8); 441 ap->created.days = adoswordn(bp, ap->nwords - 7); 442 ap->created.mins = adoswordn(bp, ap->nwords - 6); 443 ap->created.ticks = adoswordn(bp, ap->nwords - 5); 444 break; 445 case ALDIR: 446 case ADIR: 447 vp->v_type = VDIR; 448 break; 449 case ALFILE: 450 case AFILE: 451 vp->v_type = VREG; 452 ap->fsize = adoswordn(bp, ap->nwords - 47); 453 break; 454 case ASLINK: /* XXX soft link */ 455 vp->v_type = VLNK; 456 /* 457 * convert from BCPL string and 458 * from: "part:dir/file" to: "/part/dir/file" 459 */ 460 nam = bp->b_data + (6 * sizeof(long)); 461 namlen = strlen(nam); 462 tmp = nam; 463 while (*tmp && *tmp != ':') 464 tmp++; 465 if (*tmp == 0) { 466 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 467 memcpy(ap->slinkto, nam, namlen); 468 } else if (*nam == ':') { 469 ap->slinkto = malloc(namlen + 1, M_ANODE, M_WAITOK); 470 memcpy(ap->slinkto, nam, namlen); 471 ap->slinkto[0] = '/'; 472 } else { 473 ap->slinkto = malloc(namlen + 2, M_ANODE, M_WAITOK); 474 ap->slinkto[0] = '/'; 475 memcpy(&ap->slinkto[1], nam, namlen); 476 ap->slinkto[tmp - nam + 1] = '/'; 477 namlen++; 478 } 479 ap->slinkto[namlen] = 0; 480 ap->fsize = namlen; 481 break; 482 default: 483 brelse(bp); 484 vput(vp); 485 return (EINVAL); 486 } 487 488 /* 489 * Get appropriate data from this block; hard link needs 490 * to get other data from the "real" block. 491 */ 492 493 /* 494 * copy in name (from original block) 495 */ 496 nam = bp->b_data + (ap->nwords - 20) * sizeof(u_int32_t); 497 namlen = *(u_char *)nam++; 498 if (namlen > 30) { 499 #ifdef DIAGNOSTIC 500 printf("adosfs: aget: name length too long blk %d\n", an); 501 #endif 502 brelse(bp); 503 vput(vp); 504 return (EINVAL); 505 } 506 memcpy(ap->name, nam, namlen); 507 ap->name[namlen] = 0; 508 509 /* 510 * if dir alloc hash table and copy it in 511 */ 512 if (vp->v_type == VDIR) { 513 int i; 514 515 ap->tab = malloc(ANODETABSZ(ap) * 2, M_ANODE, M_WAITOK); 516 ap->ntabent = ANODETABENT(ap); 517 ap->tabi = (int *)&ap->tab[ap->ntabent]; 518 memset(ap->tabi, 0, ANODETABSZ(ap)); 519 for (i = 0; i < ap->ntabent; i++) 520 ap->tab[i] = adoswordn(bp, i + 6); 521 } 522 523 /* 524 * misc. 525 */ 526 ap->pblock = adoswordn(bp, ap->nwords - 3); 527 ap->hashf = adoswordn(bp, ap->nwords - 4); 528 ap->linknext = adoswordn(bp, ap->nwords - 10); 529 ap->linkto = adoswordn(bp, ap->nwords - 11); 530 531 /* 532 * setup last indirect block cache. 533 */ 534 ap->lastlindblk = 0; 535 if (ap->type == AFILE) { 536 ap->lastindblk = ap->block; 537 if (adoswordn(bp, ap->nwords - 10)) 538 ap->linkto = ap->block; 539 } else if (ap->type == ALFILE) { 540 ap->lastindblk = ap->linkto; 541 brelse(bp); 542 bp = NULL; 543 error = bread(amp->devvp, ap->linkto * amp->bsize / DEV_BSIZE, 544 amp->bsize, NOCRED, &bp); 545 if (error) { 546 brelse(bp); 547 vput(vp); 548 return (error); 549 } 550 ap->fsize = adoswordn(bp, ap->nwords - 47); 551 /* 552 * Should ap->block be set to the real file header block? 553 */ 554 ap->block = ap->linkto; 555 } 556 557 if (ap->type == AROOT) { 558 ap->adprot = 15; 559 ap->uid = amp->uid; 560 ap->gid = amp->gid; 561 } else { 562 ap->adprot = adoswordn(bp, ap->nwords - 48) ^ 15; 563 /* 564 * ADOS directories do not have a `x' protection bit as 565 * it is known in VFS; this functionality is fulfilled 566 * by the ADOS `r' bit. 567 * 568 * To retain the ADOS behaviour, fake execute permissions 569 * in that case. 570 */ 571 if ((ap->type == ADIR || ap->type == ALDIR) && 572 (ap->adprot & 0x00000008) == 0) 573 ap->adprot &= ~0x00000002; 574 575 /* 576 * Get uid/gid from extensions in file header 577 * (really need to know if this is a muFS partition) 578 */ 579 ap->uid = (adoswordn(bp, ap->nwords - 49) >> 16) & 0xffff; 580 ap->gid = adoswordn(bp, ap->nwords - 49) & 0xffff; 581 if (ap->uid || ap->gid) { 582 if (ap->uid == 0xffff) 583 ap->uid = 0; 584 if (ap->gid == 0xffff) 585 ap->gid = 0; 586 ap->adprot |= 0x40000000; /* Kludge */ 587 } 588 else { 589 /* 590 * uid & gid extension don't exist, 591 * so use the mount-point uid/gid 592 */ 593 ap->uid = amp->uid; 594 ap->gid = amp->gid; 595 } 596 } 597 ap->mtime.days = adoswordn(bp, ap->nwords - 23); 598 ap->mtime.mins = adoswordn(bp, ap->nwords - 22); 599 ap->mtime.ticks = adoswordn(bp, ap->nwords - 21); 600 601 genfs_node_init(vp, &adosfs_genfsops); 602 *vpp = vp; 603 brelse(bp); 604 vp->v_size = ap->fsize; 605 return (0); 606 } 607 608 /* 609 * Load the bitmap into memory, and count the number of available 610 * blocks. 611 * The bitmap will be released if the filesystem is read-only; it's 612 * only needed to find the free space. 613 */ 614 int 615 adosfs_loadbitmap(amp) 616 struct adosfsmount *amp; 617 { 618 struct buf *bp, *mapbp; 619 u_long bn; 620 int blkix, endix, mapix; 621 int bmsize; 622 int error; 623 624 bp = mapbp = NULL; 625 bn = amp->rootb; 626 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, amp->bsize, 627 NOCRED, &bp)) != 0) { 628 brelse(bp); 629 return (error); 630 } 631 blkix = amp->nwords - 49; 632 endix = amp->nwords - 24; 633 mapix = 0; 634 bmsize = (amp->numblks + 31) / 32; 635 while (mapix < bmsize) { 636 int n; 637 u_long bits; 638 639 if (adoswordn(bp, blkix) == 0) 640 break; 641 if (mapbp != NULL) 642 brelse(mapbp); 643 if ((error = bread(amp->devvp, 644 adoswordn(bp, blkix) * amp->bsize / DEV_BSIZE, amp->bsize, 645 NOCRED, &mapbp)) != 0) 646 break; 647 if (adoscksum(mapbp, amp->nwords)) { 648 #ifdef DIAGNOSTIC 649 printf("adosfs: loadbitmap - cksum of blk %d failed\n", 650 adoswordn(bp, blkix)); 651 #endif 652 /* XXX Force read-only? Set free space 0? */ 653 break; 654 } 655 n = 1; 656 while (n < amp->nwords && mapix < bmsize) { 657 amp->bitmap[mapix++] = bits = adoswordn(mapbp, n); 658 ++n; 659 if (mapix == bmsize && amp->numblks & 31) 660 bits &= ~(0xffffffff << (amp->numblks & 31)); 661 while (bits) { 662 if (bits & 1) 663 ++amp->freeblks; 664 bits >>= 1; 665 } 666 } 667 ++blkix; 668 if (mapix < bmsize && blkix == endix) { 669 bn = adoswordn(bp, blkix); 670 brelse(bp); 671 if ((error = bread(amp->devvp, bn * amp->bsize / DEV_BSIZE, 672 amp->bsize, NOCRED, &bp)) != 0) 673 break; 674 /* 675 * Why is there no checksum on these blocks? 676 */ 677 blkix = 0; 678 endix = amp->nwords - 1; 679 } 680 } 681 if (bp) 682 brelse(bp); 683 if (mapbp) 684 brelse(mapbp); 685 return (error); 686 } 687 688 689 /* 690 * File handle to vnode 691 * 692 * Have to be really careful about stale file handles: 693 * - check that the inode number is in range 694 * - call iget() to get the locked inode 695 * - check for an unallocated inode (i_mode == 0) 696 * - check that the generation number matches 697 */ 698 699 struct ifid { 700 ushort ifid_len; 701 ushort ifid_pad; 702 int ifid_ino; 703 long ifid_start; 704 }; 705 706 int 707 adosfs_fhtovp(mp, fhp, vpp) 708 struct mount *mp; 709 struct fid *fhp; 710 struct vnode **vpp; 711 { 712 struct ifid *ifhp = (struct ifid *)fhp; 713 #if 0 714 struct anode *ap; 715 #endif 716 struct vnode *nvp; 717 int error; 718 719 #ifdef ADOSFS_DIAGNOSTIC 720 printf("adfhtovp(%x, %x, %x)\n", mp, fhp, vpp); 721 #endif 722 723 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 724 *vpp = NULLVP; 725 return (error); 726 } 727 #if 0 728 ap = VTOA(nvp); 729 if (ap->inode.iso_mode == 0) { 730 vput(nvp); 731 *vpp = NULLVP; 732 return (ESTALE); 733 } 734 #endif 735 *vpp = nvp; 736 return(0); 737 } 738 739 int 740 adosfs_checkexp(mp, nam, exflagsp, credanonp) 741 struct mount *mp; 742 struct mbuf *nam; 743 int *exflagsp; 744 struct ucred **credanonp; 745 { 746 struct adosfsmount *amp = VFSTOADOSFS(mp); 747 #if 0 748 struct anode *ap; 749 #endif 750 struct netcred *np; 751 752 #ifdef ADOSFS_DIAGNOSTIC 753 printf("adcheckexp(%x, %x, %x)\n", mp, nam, exflagsp); 754 #endif 755 756 /* 757 * Get the export permission structure for this <mp, client> tuple. 758 */ 759 np = vfs_export_lookup(mp, &->export, nam); 760 if (np == NULL) 761 return (EACCES); 762 763 *exflagsp = np->netc_exflags; 764 *credanonp = &np->netc_anon; 765 return(0); 766 } 767 768 int 769 adosfs_vptofh(vp, fhp) 770 struct vnode *vp; 771 struct fid *fhp; 772 { 773 struct anode *ap = VTOA(vp); 774 struct ifid *ifhp; 775 776 ifhp = (struct ifid *)fhp; 777 ifhp->ifid_len = sizeof(struct ifid); 778 779 ifhp->ifid_ino = ap->block; 780 ifhp->ifid_start = ap->block; 781 782 #ifdef ADOSFS_DIAGNOSTIC 783 printf("advptofh(%x, %x)\n", vp, fhp); 784 #endif 785 return(0); 786 } 787 788 int 789 adosfs_quotactl(mp, cmds, uid, arg, p) 790 struct mount *mp; 791 int cmds; 792 uid_t uid; 793 caddr_t arg; 794 struct proc *p; 795 { 796 return(EOPNOTSUPP); 797 } 798 799 int 800 adosfs_sync(mp, waitfor, uc, p) 801 struct mount *mp; 802 int waitfor; 803 struct ucred *uc; 804 struct proc *p; 805 { 806 #ifdef ADOSFS_DIAGNOSTIC 807 printf("ad_sync(%x, %x)\n", mp, waitfor); 808 #endif 809 return(0); 810 } 811 812 void 813 adosfs_init() 814 { 815 simple_lock_init(&adosfs_hashlock); 816 817 pool_init(&adosfs_node_pool, sizeof(struct anode), 0, 0, 0, 818 "adosndpl", &pool_allocator_nointr); 819 } 820 821 void 822 adosfs_done() 823 { 824 pool_destroy(&adosfs_node_pool); 825 } 826 827 SYSCTL_SETUP(sysctl_vfs_adosfs_setup, "sysctl vfs.adosfs subtree setup") 828 { 829 830 sysctl_createv(SYSCTL_PERMANENT, 831 CTLTYPE_NODE, "vfs", NULL, 832 NULL, 0, NULL, 0, 833 CTL_VFS, CTL_EOL); 834 sysctl_createv(SYSCTL_PERMANENT, 835 CTLTYPE_NODE, "adosfs", NULL, 836 NULL, 0, NULL, 0, 837 CTL_VFS, 16, CTL_EOL); 838 /* 839 * XXX the "16" above could be dynamic, thereby eliminating 840 * one more instance of the "number to vfs" mapping problem, 841 * but "16" is the order as taken from sys/mount.h 842 */ 843 } 844 845 /* 846 * vfs generic function call table 847 */ 848 849 extern const struct vnodeopv_desc adosfs_vnodeop_opv_desc; 850 851 const struct vnodeopv_desc *adosfs_vnodeopv_descs[] = { 852 &adosfs_vnodeop_opv_desc, 853 NULL, 854 }; 855 856 struct vfsops adosfs_vfsops = { 857 MOUNT_ADOSFS, 858 adosfs_mount, 859 adosfs_start, 860 adosfs_unmount, 861 adosfs_root, 862 adosfs_quotactl, 863 adosfs_statfs, 864 adosfs_sync, 865 adosfs_vget, 866 adosfs_fhtovp, 867 adosfs_vptofh, 868 adosfs_init, 869 NULL, 870 adosfs_done, 871 NULL, 872 NULL, /* vfs_mountroot */ 873 adosfs_checkexp, 874 adosfs_vnodeopv_descs, 875 }; 876
Indexes created Mon Sep 22 13:09:51 GMT 2025