filecore_vfsops.c revision 1.5.2.6
1 /* $NetBSD: filecore_vfsops.c,v 1.5.2.6 2004/08/26 07:46:51 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * filecore_vfsops.c 1.1 1998/6/26 32 */ 33 34 /*- 35 * Copyright (c) 1998 Andrew McMurry 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * filecore_vfsops.c 1.1 1998/6/26 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: filecore_vfsops.c,v 1.5.2.6 2004/08/26 07:46:51 skrll Exp $"); 70 71 #if defined(_KERNEL_OPT) 72 #include "opt_compat_netbsd.h" 73 #endif 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/namei.h> 78 #include <sys/proc.h> 79 #include <sys/vnode.h> 80 #include <miscfs/specfs/specdev.h> 81 #include <sys/mount.h> 82 #include <sys/buf.h> 83 #include <sys/file.h> 84 #include <sys/device.h> 85 #include <sys/errno.h> 86 #include <sys/malloc.h> 87 #include <sys/pool.h> 88 #include <sys/conf.h> 89 #include <sys/sysctl.h> 90 91 #include <fs/filecorefs/filecore.h> 92 #include <fs/filecorefs/filecore_extern.h> 93 #include <fs/filecorefs/filecore_node.h> 94 #include <fs/filecorefs/filecore_mount.h> 95 96 MALLOC_DEFINE(M_FILECOREMNT, "filecore mount", "Filecore FS mount structures"); 97 98 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 99 100 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 101 &filecore_vnodeop_opv_desc, 102 NULL, 103 }; 104 105 struct vfsops filecore_vfsops = { 106 MOUNT_FILECORE, 107 filecore_mount, 108 filecore_start, 109 filecore_unmount, 110 filecore_root, 111 filecore_quotactl, 112 filecore_statvfs, 113 filecore_sync, 114 filecore_vget, 115 filecore_fhtovp, 116 filecore_vptofh, 117 filecore_init, 118 filecore_reinit, 119 filecore_done, 120 NULL, 121 NULL, /* filecore_mountroot */ 122 filecore_checkexp, 123 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 124 filecore_vnodeopv_descs, 125 }; 126 127 struct genfs_ops filecore_genfsops = { 128 genfs_size, 129 }; 130 131 /* 132 * Called by vfs_mountroot when iso is going to be mounted as root. 133 * 134 * Name is updated by mount(8) after booting. 135 */ 136 137 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 138 struct lwp *l, struct filecore_args *argp)); 139 140 #if 0 141 int 142 filecore_mountroot() 143 { 144 struct mount *mp; 145 extern struct vnode *rootvp; 146 struct proc *p = curproc; /* XXX */ 147 int error; 148 struct filecore_args args; 149 150 if (root_device->dv_class != DV_DISK) 151 return (ENODEV); 152 153 /* 154 * Get vnodes for swapdev and rootdev. 155 */ 156 if (bdevvp(rootdev, &rootvp)) 157 panic("filecore_mountroot: can't setup rootvp"); 158 159 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 160 return (error); 161 162 args.flags = FILECOREMNT_ROOT; 163 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 164 mp->mnt_op->vfs_refcount--; 165 vfs_unbusy(mp); 166 free(mp, M_MOUNT); 167 return (error); 168 } 169 simple_lock(&mountlist_slock); 170 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 171 simple_unlock(&mountlist_slock); 172 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 173 vfs_unbusy(mp); 174 return (0); 175 } 176 #endif 177 178 /* 179 * VFS Operations. 180 * 181 * mount system call 182 */ 183 int 184 filecore_mount(mp, path, data, ndp, l) 185 struct mount *mp; 186 const char *path; 187 void *data; 188 struct nameidata *ndp; 189 struct lwp *l; 190 { 191 struct vnode *devvp; 192 struct filecore_args args; 193 struct proc *p; 194 int error; 195 struct filecore_mnt *fcmp = NULL; 196 197 p = l->l_proc; 198 if (mp->mnt_flag & MNT_GETARGS) { 199 fcmp = VFSTOFILECORE(mp); 200 if (fcmp == NULL) 201 return EIO; 202 args.flags = fcmp->fc_mntflags; 203 args.uid = fcmp->fc_uid; 204 args.gid = fcmp->fc_gid; 205 args.fspec = NULL; 206 vfs_showexport(mp, &args.export, &fcmp->fc_export); 207 return copyout(&args, data, sizeof(args)); 208 } 209 error = copyin(data, &args, sizeof (struct filecore_args)); 210 if (error) 211 return (error); 212 213 if ((mp->mnt_flag & MNT_RDONLY) == 0) 214 return (EROFS); 215 216 /* 217 * If updating, check whether changing from read-only to 218 * read/write; if there is no device name, that's all we do. 219 */ 220 if (mp->mnt_flag & MNT_UPDATE) { 221 fcmp = VFSTOFILECORE(mp); 222 if (args.fspec == 0) 223 return (vfs_export(mp, &fcmp->fc_export, &args.export)); 224 } 225 /* 226 * Not an update, or updating the name: look up the name 227 * and verify that it refers to a sensible block device. 228 */ 229 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 230 if ((error = namei(ndp)) != 0) 231 return (error); 232 devvp = ndp->ni_vp; 233 234 if (devvp->v_type != VBLK) { 235 vrele(devvp); 236 return ENOTBLK; 237 } 238 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 239 vrele(devvp); 240 return ENXIO; 241 } 242 /* 243 * If mount by non-root, then verify that user has necessary 244 * permissions on the device. 245 */ 246 if (p->p_ucred->cr_uid != 0) { 247 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 248 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, l); 249 VOP_UNLOCK(devvp, 0); 250 if (error) { 251 vrele(devvp); 252 return (error); 253 } 254 } 255 if ((mp->mnt_flag & MNT_UPDATE) == 0) 256 error = filecore_mountfs(devvp, mp, l, &args); 257 else { 258 if (devvp != fcmp->fc_devvp) 259 error = EINVAL; /* needs translation */ 260 else 261 vrele(devvp); 262 } 263 if (error) { 264 vrele(devvp); 265 return error; 266 } 267 fcmp = VFSTOFILECORE(mp); 268 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 269 mp, l); 270 } 271 272 /* 273 * Common code for mount and mountroot 274 */ 275 static int 276 filecore_mountfs(devvp, mp, l, argp) 277 struct vnode *devvp; 278 struct mount *mp; 279 struct lwp *l; 280 struct filecore_args *argp; 281 { 282 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 283 struct buf *bp = NULL; 284 dev_t dev = devvp->v_rdev; 285 int error = EINVAL; 286 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 287 extern struct vnode *rootvp; 288 struct filecore_disc_record *fcdr; 289 unsigned map; 290 unsigned log2secsize; 291 292 if (!ronly) 293 return EROFS; 294 295 /* 296 * Disallow multiple mounts of the same device. 297 * Disallow mounting of a device that is currently in use 298 * (except for root, which might share swap device for miniroot). 299 * Flush out any old buffers remaining from a previous use. 300 */ 301 if ((error = vfs_mountedon(devvp)) != 0) 302 return error; 303 if (vcount(devvp) > 1 && devvp != rootvp) 304 return EBUSY; 305 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_ucred, l, 0, 0)) 306 != 0) 307 return (error); 308 309 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 310 if (error) 311 return error; 312 313 /* Read the filecore boot block to check FS validity and to find the map */ 314 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 315 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 316 #ifdef FILECORE_DEBUG_BR 317 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 318 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 319 bp, error); 320 #endif 321 if (error != 0) 322 goto out; 323 if (filecore_bbchecksum(bp->b_data) != 0) { 324 error = EINVAL; 325 goto out; 326 } 327 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 328 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 329 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 330 << fcdr->log2bpmb) >> fcdr->log2secsize; 331 log2secsize = fcdr->log2secsize; 332 bp->b_flags |= B_AGE; 333 #ifdef FILECORE_DEBUG_BR 334 printf("brelse(%p) vf1\n", bp); 335 #endif 336 brelse(bp); 337 bp = NULL; 338 339 /* Read the bootblock in the map */ 340 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 341 #ifdef FILECORE_DEBUG_BR 342 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 343 map, 1 << log2secsize, bp, error); 344 #endif 345 if (error != 0) 346 goto out; 347 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 348 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 349 memset(fcmp, 0, sizeof *fcmp); 350 if (fcdr->log2bpmb > fcdr->log2secsize) 351 fcmp->log2bsize = fcdr->log2bpmb; 352 else fcmp->log2bsize = fcdr->log2secsize; 353 fcmp->blksize = 1 << fcmp->log2bsize; 354 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 355 fcmp->map = map; 356 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 357 / (fcdr->idlen + 1); 358 fcmp->mask = (1 << fcdr->idlen) - 1; 359 if (fcdr->big_flag & 1) { 360 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 361 + fcdr->disc_size) / fcmp->blksize; 362 } else { 363 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 364 } 365 366 bp->b_flags |= B_AGE; 367 #ifdef FILECORE_DEBUG_BR 368 printf("brelse(%p) vf2\n", bp); 369 #endif 370 brelse(bp); 371 bp = NULL; 372 373 mp->mnt_data = fcmp; 374 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 375 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 376 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 377 mp->mnt_flag |= MNT_LOCAL; 378 mp->mnt_dev_bshift = fcdr->log2secsize; 379 mp->mnt_fs_bshift = fcmp->log2bsize; 380 381 fcmp->fc_mountp = mp; 382 fcmp->fc_dev = dev; 383 fcmp->fc_devvp = devvp; 384 fcmp->fc_mntflags = argp->flags; 385 if (argp->flags & FILECOREMNT_USEUID) { 386 fcmp->fc_uid = l->l_proc->p_cred->p_ruid; 387 fcmp->fc_gid = l->l_proc->p_cred->p_rgid; 388 } else { 389 fcmp->fc_uid = argp->uid; 390 fcmp->fc_gid = argp->gid; 391 } 392 393 return 0; 394 out: 395 if (bp) { 396 #ifdef FILECORE_DEBUG_BR 397 printf("brelse(%p) vf3\n", bp); 398 #endif 399 brelse(bp); 400 } 401 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 402 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 403 VOP_UNLOCK(devvp, 0); 404 if (fcmp) { 405 free(fcmp, M_FILECOREMNT); 406 mp->mnt_data = NULL; 407 } 408 return error; 409 } 410 411 /* 412 * Make a filesystem operational. 413 * Nothing to do at the moment. 414 */ 415 /* ARGSUSED */ 416 int 417 filecore_start(mp, flags, l) 418 struct mount *mp; 419 int flags; 420 struct lwp *l; 421 { 422 return 0; 423 } 424 425 /* 426 * unmount system call 427 */ 428 int 429 filecore_unmount(mp, mntflags, l) 430 struct mount *mp; 431 int mntflags; 432 struct lwp *l; 433 { 434 struct filecore_mnt *fcmp; 435 int error, flags = 0; 436 437 if (mntflags & MNT_FORCE) 438 flags |= FORCECLOSE; 439 #if 0 440 mntflushbuf(mp, 0); 441 if (mntinvalbuf(mp)) 442 return EBUSY; 443 #endif 444 if ((error = vflush(mp, NULLVP, flags)) != 0) 445 return (error); 446 447 fcmp = VFSTOFILECORE(mp); 448 449 if (fcmp->fc_devvp->v_type != VBAD) 450 fcmp->fc_devvp->v_specmountpoint = NULL; 451 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 452 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 453 vput(fcmp->fc_devvp); 454 free(fcmp, M_FILECOREMNT); 455 mp->mnt_data = NULL; 456 mp->mnt_flag &= ~MNT_LOCAL; 457 return (error); 458 } 459 460 /* 461 * Return root of a filesystem 462 */ 463 int 464 filecore_root(mp, vpp) 465 struct mount *mp; 466 struct vnode **vpp; 467 { 468 struct vnode *nvp; 469 int error; 470 471 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 472 return (error); 473 *vpp = nvp; 474 return (0); 475 } 476 477 /* 478 * Do operations associated with quotas, not supported 479 */ 480 /* ARGSUSED */ 481 int 482 filecore_quotactl(mp, cmd, uid, arg, l) 483 struct mount *mp; 484 int cmd; 485 uid_t uid; 486 void *arg; 487 struct lwp *l; 488 { 489 490 return (EOPNOTSUPP); 491 } 492 493 /* 494 * Get file system statistics. 495 */ 496 int 497 filecore_statvfs(mp, sbp, l) 498 struct mount *mp; 499 struct statvfs *sbp; 500 struct lwp *l; 501 { 502 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 503 504 sbp->f_bsize = fcmp->blksize; 505 sbp->f_frsize = sbp->f_bsize; /* XXX */ 506 sbp->f_iosize = sbp->f_bsize; /* XXX */ 507 sbp->f_blocks = fcmp->nblks; 508 sbp->f_bfree = 0; /* total free blocks */ 509 sbp->f_bavail = 0; /* blocks free for non superuser */ 510 sbp->f_bresvd = 0; /* reserved blocks */ 511 sbp->f_files = 0; /* total files */ 512 sbp->f_ffree = 0; /* free file nodes for non superuser */ 513 sbp->f_favail = 0; /* free file nodes */ 514 sbp->f_fresvd = 0; /* reserved file nodes */ 515 copy_statvfs_info(sbp, mp); 516 return 0; 517 } 518 519 /* ARGSUSED */ 520 int 521 filecore_sync(mp, waitfor, cred, l) 522 struct mount *mp; 523 int waitfor; 524 struct ucred *cred; 525 struct lwp *l; 526 { 527 return (0); 528 } 529 530 /* 531 * File handle to vnode 532 * 533 * Have to be really careful about stale file handles: 534 * - check that the inode number is in range 535 * - call iget() to get the locked inode 536 * - check for an unallocated inode (i_mode == 0) 537 * - check that the generation number matches 538 */ 539 540 struct ifid { 541 ushort ifid_len; 542 ushort ifid_pad; 543 u_int32_t ifid_ino; 544 }; 545 546 /* ARGSUSED */ 547 int 548 filecore_fhtovp(mp, fhp, vpp) 549 struct mount *mp; 550 struct fid *fhp; 551 struct vnode **vpp; 552 { 553 struct ifid *ifhp = (struct ifid *)fhp; 554 struct vnode *nvp; 555 struct filecore_node *ip; 556 int error; 557 558 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 559 *vpp = NULLVP; 560 return (error); 561 } 562 ip = VTOI(nvp); 563 if (filecore_staleinode(ip)) { 564 vput(nvp); 565 *vpp = NULLVP; 566 return (ESTALE); 567 } 568 *vpp = nvp; 569 return (0); 570 } 571 572 /* ARGSUSED */ 573 int 574 filecore_checkexp(mp, nam, exflagsp, credanonp) 575 struct mount *mp; 576 struct mbuf *nam; 577 int *exflagsp; 578 struct ucred **credanonp; 579 { 580 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 581 struct netcred *np; 582 583 /* 584 * Get the export permission structure for this <mp, client> tuple. 585 */ 586 np = vfs_export_lookup(mp, &fcmp->fc_export, nam); 587 if (np == NULL) 588 return (EACCES); 589 590 *exflagsp = np->netc_exflags; 591 *credanonp = &np->netc_anon; 592 return (0); 593 } 594 595 /* This looks complicated. Look at other vgets as well as the iso9660 one. 596 * 597 * The filecore inode number is made up of 1 byte directory entry index and 598 * 3 bytes of the internal disc address of the directory. On a read-only 599 * filesystem this is unique. For a read-write version we may not be able to 600 * do vget, see msdosfs. 601 */ 602 603 int 604 filecore_vget(mp, ino, vpp) 605 struct mount *mp; 606 ino_t ino; 607 struct vnode **vpp; 608 { 609 struct filecore_mnt *fcmp; 610 struct filecore_node *ip; 611 struct buf *bp; 612 struct vnode *vp; 613 dev_t dev; 614 int error; 615 616 fcmp = VFSTOFILECORE(mp); 617 dev = fcmp->fc_dev; 618 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 619 return (0); 620 621 /* Allocate a new vnode/filecore_node. */ 622 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 623 != 0) { 624 *vpp = NULLVP; 625 return (error); 626 } 627 ip = pool_get(&filecore_node_pool, PR_WAITOK); 628 memset(ip, 0, sizeof(struct filecore_node)); 629 vp->v_data = ip; 630 ip->i_vnode = vp; 631 ip->i_dev = dev; 632 ip->i_number = ino; 633 ip->i_block = -1; 634 ip->i_parent = -2; 635 636 /* 637 * Put it onto its hash chain and lock it so that other requests for 638 * this inode will block if they arrive while we are sleeping waiting 639 * for old data structures to be purged or for the contents of the 640 * disk portion of this inode to be read. 641 */ 642 filecore_ihashins(ip); 643 644 if (ino == FILECORE_ROOTINO) { 645 /* Here we need to construct a root directory inode */ 646 memcpy(ip->i_dirent.name, "root", 4); 647 ip->i_dirent.load = 0; 648 ip->i_dirent.exec = 0; 649 ip->i_dirent.len = FILECORE_DIR_SIZE; 650 ip->i_dirent.addr = fcmp->drec.root; 651 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 652 653 } else { 654 /* Read in Data from Directory Entry */ 655 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 656 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 657 vput(vp); 658 #ifdef FILECORE_DEBUG_BR 659 printf("brelse(%p) vf4\n", bp); 660 #endif 661 brelse(bp); 662 *vpp = NULL; 663 return (error); 664 } 665 666 memcpy(&ip->i_dirent, 667 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 668 sizeof(struct filecore_direntry)); 669 #ifdef FILECORE_DEBUG_BR 670 printf("brelse(%p) vf5\n", bp); 671 #endif 672 brelse(bp); 673 } 674 675 ip->i_mnt = fcmp; 676 ip->i_devvp = fcmp->fc_devvp; 677 ip->i_diroff = 0; 678 VREF(ip->i_devvp); 679 680 /* 681 * Setup type 682 */ 683 vp->v_type = VREG; 684 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 685 vp->v_type = VDIR; 686 687 /* 688 * Initialize the associated vnode 689 */ 690 switch (vp->v_type) { 691 case VFIFO: 692 case VCHR: 693 case VBLK: 694 /* 695 * Devices not supported. 696 */ 697 vput(vp); 698 return (EOPNOTSUPP); 699 case VLNK: 700 case VNON: 701 case VSOCK: 702 case VDIR: 703 case VBAD: 704 case VREG: 705 break; 706 } 707 708 if (ino == FILECORE_ROOTINO) 709 vp->v_flag |= VROOT; 710 711 /* 712 * XXX need generation number? 713 */ 714 715 genfs_node_init(vp, &filecore_genfsops); 716 vp->v_size = ip->i_size; 717 *vpp = vp; 718 return (0); 719 } 720 721 /* 722 * Vnode pointer to File handle 723 */ 724 /* ARGSUSED */ 725 int 726 filecore_vptofh(vp, fhp) 727 struct vnode *vp; 728 struct fid *fhp; 729 { 730 struct filecore_node *ip = VTOI(vp); 731 struct ifid *ifhp; 732 733 ifhp = (struct ifid *)fhp; 734 ifhp->ifid_len = sizeof(struct ifid); 735 ifhp->ifid_ino = ip->i_number; 736 return 0; 737 } 738 739 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 740 { 741 742 sysctl_createv(clog, 0, NULL, NULL, 743 CTLFLAG_PERMANENT, 744 CTLTYPE_NODE, "vfs", NULL, 745 NULL, 0, NULL, 0, 746 CTL_VFS, CTL_EOL); 747 sysctl_createv(clog, 0, NULL, NULL, 748 CTLFLAG_PERMANENT, 749 CTLTYPE_NODE, "filecore", 750 SYSCTL_DESCR("Acorn FILECORE file system"), 751 NULL, 0, NULL, 0, 752 CTL_VFS, 19, CTL_EOL); 753 /* 754 * XXX the "19" above could be dynamic, thereby eliminating 755 * one more instance of the "number to vfs" mapping problem, 756 * but "19" is the order as taken from sys/mount.h 757 */ 758 } 759
Indexes created Wed Oct 01 12:09:54 GMT 2025