filecore_vfsops.c revision 1.5.2.9
1 /* $NetBSD: filecore_vfsops.c,v 1.5.2.9 2005/01/17 19:32:12 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 1.5.2.9 2005/01/17 19:32:12 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 vfs_stdextattrctl, 125 filecore_vnodeopv_descs, 126 }; 127 128 struct genfs_ops filecore_genfsops = { 129 genfs_size, 130 }; 131 132 /* 133 * Called by vfs_mountroot when iso is going to be mounted as root. 134 * 135 * Name is updated by mount(8) after booting. 136 */ 137 138 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 139 struct lwp *l, struct filecore_args *argp)); 140 141 #if 0 142 int 143 filecore_mountroot() 144 { 145 struct mount *mp; 146 extern struct vnode *rootvp; 147 struct proc *p = curproc; /* XXX */ 148 int error; 149 struct filecore_args args; 150 151 if (root_device->dv_class != DV_DISK) 152 return (ENODEV); 153 154 /* 155 * Get vnodes for swapdev and rootdev. 156 */ 157 if (bdevvp(rootdev, &rootvp)) 158 panic("filecore_mountroot: can't setup rootvp"); 159 160 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 161 return (error); 162 163 args.flags = FILECOREMNT_ROOT; 164 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 165 mp->mnt_op->vfs_refcount--; 166 vfs_unbusy(mp); 167 free(mp, M_MOUNT); 168 return (error); 169 } 170 simple_lock(&mountlist_slock); 171 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 172 simple_unlock(&mountlist_slock); 173 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 174 vfs_unbusy(mp); 175 return (0); 176 } 177 #endif 178 179 /* 180 * VFS Operations. 181 * 182 * mount system call 183 */ 184 int 185 filecore_mount(mp, path, data, ndp, l) 186 struct mount *mp; 187 const char *path; 188 void *data; 189 struct nameidata *ndp; 190 struct lwp *l; 191 { 192 struct vnode *devvp; 193 struct filecore_args args; 194 struct proc *p; 195 int error; 196 struct filecore_mnt *fcmp = NULL; 197 198 p = l->l_proc; 199 if (mp->mnt_flag & MNT_GETARGS) { 200 fcmp = VFSTOFILECORE(mp); 201 if (fcmp == NULL) 202 return EIO; 203 args.flags = fcmp->fc_mntflags; 204 args.uid = fcmp->fc_uid; 205 args.gid = fcmp->fc_gid; 206 args.fspec = NULL; 207 vfs_showexport(mp, &args.export, &fcmp->fc_export); 208 return copyout(&args, data, sizeof(args)); 209 } 210 error = copyin(data, &args, sizeof (struct filecore_args)); 211 if (error) 212 return (error); 213 214 if ((mp->mnt_flag & MNT_RDONLY) == 0) 215 return (EROFS); 216 217 /* 218 * If updating, check whether changing from read-only to 219 * read/write; if there is no device name, that's all we do. 220 */ 221 if (mp->mnt_flag & MNT_UPDATE) { 222 fcmp = VFSTOFILECORE(mp); 223 if (args.fspec == 0) 224 return (vfs_export(mp, &fcmp->fc_export, &args.export)); 225 } 226 /* 227 * Not an update, or updating the name: look up the name 228 * and verify that it refers to a sensible block device. 229 */ 230 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 231 if ((error = namei(ndp)) != 0) 232 return (error); 233 devvp = ndp->ni_vp; 234 235 if (devvp->v_type != VBLK) { 236 vrele(devvp); 237 return ENOTBLK; 238 } 239 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 240 vrele(devvp); 241 return ENXIO; 242 } 243 /* 244 * If mount by non-root, then verify that user has necessary 245 * permissions on the device. 246 */ 247 if (p->p_ucred->cr_uid != 0) { 248 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 249 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, l); 250 VOP_UNLOCK(devvp, 0); 251 if (error) { 252 vrele(devvp); 253 return (error); 254 } 255 } 256 if ((mp->mnt_flag & MNT_UPDATE) == 0) 257 error = filecore_mountfs(devvp, mp, l, &args); 258 else { 259 if (devvp != fcmp->fc_devvp) 260 error = EINVAL; /* needs translation */ 261 else 262 vrele(devvp); 263 } 264 if (error) { 265 vrele(devvp); 266 return error; 267 } 268 fcmp = VFSTOFILECORE(mp); 269 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 270 mp, l); 271 } 272 273 /* 274 * Common code for mount and mountroot 275 */ 276 static int 277 filecore_mountfs(devvp, mp, l, argp) 278 struct vnode *devvp; 279 struct mount *mp; 280 struct lwp *l; 281 struct filecore_args *argp; 282 { 283 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 284 struct buf *bp = NULL; 285 dev_t dev = devvp->v_rdev; 286 int error = EINVAL; 287 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 288 extern struct vnode *rootvp; 289 struct filecore_disc_record *fcdr; 290 unsigned map; 291 unsigned log2secsize; 292 293 if (!ronly) 294 return EROFS; 295 296 /* 297 * Disallow multiple mounts of the same device. 298 * Disallow mounting of a device that is currently in use 299 * (except for root, which might share swap device for miniroot). 300 * Flush out any old buffers remaining from a previous use. 301 */ 302 if ((error = vfs_mountedon(devvp)) != 0) 303 return error; 304 if (vcount(devvp) > 1 && devvp != rootvp) 305 return EBUSY; 306 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_ucred, l, 0, 0)) 307 != 0) 308 return (error); 309 310 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 311 if (error) 312 return error; 313 314 /* Read the filecore boot block to check FS validity and to find the map */ 315 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 316 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 317 #ifdef FILECORE_DEBUG_BR 318 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 319 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 320 bp, error); 321 #endif 322 if (error != 0) 323 goto out; 324 if (filecore_bbchecksum(bp->b_data) != 0) { 325 error = EINVAL; 326 goto out; 327 } 328 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 329 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 330 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 331 << fcdr->log2bpmb) >> fcdr->log2secsize; 332 log2secsize = fcdr->log2secsize; 333 bp->b_flags |= B_AGE; 334 #ifdef FILECORE_DEBUG_BR 335 printf("brelse(%p) vf1\n", bp); 336 #endif 337 brelse(bp); 338 bp = NULL; 339 340 /* Read the bootblock in the map */ 341 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 342 #ifdef FILECORE_DEBUG_BR 343 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 344 map, 1 << log2secsize, bp, error); 345 #endif 346 if (error != 0) 347 goto out; 348 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 349 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 350 memset(fcmp, 0, sizeof *fcmp); 351 if (fcdr->log2bpmb > fcdr->log2secsize) 352 fcmp->log2bsize = fcdr->log2bpmb; 353 else fcmp->log2bsize = fcdr->log2secsize; 354 fcmp->blksize = 1 << fcmp->log2bsize; 355 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 356 fcmp->map = map; 357 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 358 / (fcdr->idlen + 1); 359 fcmp->mask = (1 << fcdr->idlen) - 1; 360 if (fcdr->big_flag & 1) { 361 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 362 + fcdr->disc_size) / fcmp->blksize; 363 } else { 364 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 365 } 366 367 bp->b_flags |= B_AGE; 368 #ifdef FILECORE_DEBUG_BR 369 printf("brelse(%p) vf2\n", bp); 370 #endif 371 brelse(bp); 372 bp = NULL; 373 374 mp->mnt_data = fcmp; 375 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 376 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 377 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 378 mp->mnt_stat.f_namemax = 10; 379 mp->mnt_flag |= MNT_LOCAL; 380 mp->mnt_dev_bshift = fcdr->log2secsize; 381 mp->mnt_fs_bshift = fcmp->log2bsize; 382 383 fcmp->fc_mountp = mp; 384 fcmp->fc_dev = dev; 385 fcmp->fc_devvp = devvp; 386 fcmp->fc_mntflags = argp->flags; 387 if (argp->flags & FILECOREMNT_USEUID) { 388 fcmp->fc_uid = l->l_proc->p_cred->p_ruid; 389 fcmp->fc_gid = l->l_proc->p_cred->p_rgid; 390 } else { 391 fcmp->fc_uid = argp->uid; 392 fcmp->fc_gid = argp->gid; 393 } 394 395 return 0; 396 out: 397 if (bp) { 398 #ifdef FILECORE_DEBUG_BR 399 printf("brelse(%p) vf3\n", bp); 400 #endif 401 brelse(bp); 402 } 403 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 404 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 405 VOP_UNLOCK(devvp, 0); 406 if (fcmp) { 407 free(fcmp, M_FILECOREMNT); 408 mp->mnt_data = NULL; 409 } 410 return error; 411 } 412 413 /* 414 * Make a filesystem operational. 415 * Nothing to do at the moment. 416 */ 417 /* ARGSUSED */ 418 int 419 filecore_start(mp, flags, l) 420 struct mount *mp; 421 int flags; 422 struct lwp *l; 423 { 424 return 0; 425 } 426 427 /* 428 * unmount system call 429 */ 430 int 431 filecore_unmount(mp, mntflags, l) 432 struct mount *mp; 433 int mntflags; 434 struct lwp *l; 435 { 436 struct filecore_mnt *fcmp; 437 int error, flags = 0; 438 439 if (mntflags & MNT_FORCE) 440 flags |= FORCECLOSE; 441 #if 0 442 mntflushbuf(mp, 0); 443 if (mntinvalbuf(mp)) 444 return EBUSY; 445 #endif 446 if ((error = vflush(mp, NULLVP, flags)) != 0) 447 return (error); 448 449 fcmp = VFSTOFILECORE(mp); 450 451 if (fcmp->fc_devvp->v_type != VBAD) 452 fcmp->fc_devvp->v_specmountpoint = NULL; 453 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 454 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 455 vput(fcmp->fc_devvp); 456 free(fcmp, M_FILECOREMNT); 457 mp->mnt_data = NULL; 458 mp->mnt_flag &= ~MNT_LOCAL; 459 return (error); 460 } 461 462 /* 463 * Return root of a filesystem 464 */ 465 int 466 filecore_root(mp, vpp) 467 struct mount *mp; 468 struct vnode **vpp; 469 { 470 struct vnode *nvp; 471 int error; 472 473 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 474 return (error); 475 *vpp = nvp; 476 return (0); 477 } 478 479 /* 480 * Do operations associated with quotas, not supported 481 */ 482 /* ARGSUSED */ 483 int 484 filecore_quotactl(mp, cmd, uid, arg, l) 485 struct mount *mp; 486 int cmd; 487 uid_t uid; 488 void *arg; 489 struct lwp *l; 490 { 491 492 return (EOPNOTSUPP); 493 } 494 495 /* 496 * Get file system statistics. 497 */ 498 int 499 filecore_statvfs(mp, sbp, l) 500 struct mount *mp; 501 struct statvfs *sbp; 502 struct lwp *l; 503 { 504 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 505 506 sbp->f_bsize = fcmp->blksize; 507 sbp->f_frsize = sbp->f_bsize; /* XXX */ 508 sbp->f_iosize = sbp->f_bsize; /* XXX */ 509 sbp->f_blocks = fcmp->nblks; 510 sbp->f_bfree = 0; /* total free blocks */ 511 sbp->f_bavail = 0; /* blocks free for non superuser */ 512 sbp->f_bresvd = 0; /* reserved blocks */ 513 sbp->f_files = 0; /* total files */ 514 sbp->f_ffree = 0; /* free file nodes for non superuser */ 515 sbp->f_favail = 0; /* free file nodes */ 516 sbp->f_fresvd = 0; /* reserved file nodes */ 517 copy_statvfs_info(sbp, mp); 518 return 0; 519 } 520 521 /* ARGSUSED */ 522 int 523 filecore_sync(mp, waitfor, cred, l) 524 struct mount *mp; 525 int waitfor; 526 struct ucred *cred; 527 struct lwp *l; 528 { 529 return (0); 530 } 531 532 /* 533 * File handle to vnode 534 * 535 * Have to be really careful about stale file handles: 536 * - check that the inode number is in range 537 * - call iget() to get the locked inode 538 * - check for an unallocated inode (i_mode == 0) 539 * - check that the generation number matches 540 */ 541 542 struct ifid { 543 ushort ifid_len; 544 ushort ifid_pad; 545 u_int32_t ifid_ino; 546 }; 547 548 /* ARGSUSED */ 549 int 550 filecore_fhtovp(mp, fhp, vpp) 551 struct mount *mp; 552 struct fid *fhp; 553 struct vnode **vpp; 554 { 555 struct ifid *ifhp = (struct ifid *)fhp; 556 struct vnode *nvp; 557 struct filecore_node *ip; 558 int error; 559 560 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 561 *vpp = NULLVP; 562 return (error); 563 } 564 ip = VTOI(nvp); 565 if (filecore_staleinode(ip)) { 566 vput(nvp); 567 *vpp = NULLVP; 568 return (ESTALE); 569 } 570 *vpp = nvp; 571 return (0); 572 } 573 574 /* ARGSUSED */ 575 int 576 filecore_checkexp(mp, nam, exflagsp, credanonp) 577 struct mount *mp; 578 struct mbuf *nam; 579 int *exflagsp; 580 struct ucred **credanonp; 581 { 582 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 583 struct netcred *np; 584 585 /* 586 * Get the export permission structure for this <mp, client> tuple. 587 */ 588 np = vfs_export_lookup(mp, &fcmp->fc_export, nam); 589 if (np == NULL) 590 return (EACCES); 591 592 *exflagsp = np->netc_exflags; 593 *credanonp = &np->netc_anon; 594 return (0); 595 } 596 597 /* This looks complicated. Look at other vgets as well as the iso9660 one. 598 * 599 * The filecore inode number is made up of 1 byte directory entry index and 600 * 3 bytes of the internal disc address of the directory. On a read-only 601 * filesystem this is unique. For a read-write version we may not be able to 602 * do vget, see msdosfs. 603 */ 604 605 int 606 filecore_vget(mp, ino, vpp) 607 struct mount *mp; 608 ino_t ino; 609 struct vnode **vpp; 610 { 611 struct filecore_mnt *fcmp; 612 struct filecore_node *ip; 613 struct buf *bp; 614 struct vnode *vp; 615 dev_t dev; 616 int error; 617 618 fcmp = VFSTOFILECORE(mp); 619 dev = fcmp->fc_dev; 620 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 621 return (0); 622 623 /* Allocate a new vnode/filecore_node. */ 624 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 625 != 0) { 626 *vpp = NULLVP; 627 return (error); 628 } 629 ip = pool_get(&filecore_node_pool, PR_WAITOK); 630 memset(ip, 0, sizeof(struct filecore_node)); 631 vp->v_data = ip; 632 ip->i_vnode = vp; 633 ip->i_dev = dev; 634 ip->i_number = ino; 635 ip->i_block = -1; 636 ip->i_parent = -2; 637 638 /* 639 * Put it onto its hash chain and lock it so that other requests for 640 * this inode will block if they arrive while we are sleeping waiting 641 * for old data structures to be purged or for the contents of the 642 * disk portion of this inode to be read. 643 */ 644 filecore_ihashins(ip); 645 646 if (ino == FILECORE_ROOTINO) { 647 /* Here we need to construct a root directory inode */ 648 memcpy(ip->i_dirent.name, "root", 4); 649 ip->i_dirent.load = 0; 650 ip->i_dirent.exec = 0; 651 ip->i_dirent.len = FILECORE_DIR_SIZE; 652 ip->i_dirent.addr = fcmp->drec.root; 653 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 654 655 } else { 656 /* Read in Data from Directory Entry */ 657 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 658 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 659 vput(vp); 660 #ifdef FILECORE_DEBUG_BR 661 printf("brelse(%p) vf4\n", bp); 662 #endif 663 brelse(bp); 664 *vpp = NULL; 665 return (error); 666 } 667 668 memcpy(&ip->i_dirent, 669 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 670 sizeof(struct filecore_direntry)); 671 #ifdef FILECORE_DEBUG_BR 672 printf("brelse(%p) vf5\n", bp); 673 #endif 674 brelse(bp); 675 } 676 677 ip->i_mnt = fcmp; 678 ip->i_devvp = fcmp->fc_devvp; 679 ip->i_diroff = 0; 680 VREF(ip->i_devvp); 681 682 /* 683 * Setup type 684 */ 685 vp->v_type = VREG; 686 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 687 vp->v_type = VDIR; 688 689 /* 690 * Initialize the associated vnode 691 */ 692 switch (vp->v_type) { 693 case VFIFO: 694 case VCHR: 695 case VBLK: 696 /* 697 * Devices not supported. 698 */ 699 vput(vp); 700 return (EOPNOTSUPP); 701 case VLNK: 702 case VNON: 703 case VSOCK: 704 case VDIR: 705 case VBAD: 706 case VREG: 707 break; 708 } 709 710 if (ino == FILECORE_ROOTINO) 711 vp->v_flag |= VROOT; 712 713 /* 714 * XXX need generation number? 715 */ 716 717 genfs_node_init(vp, &filecore_genfsops); 718 vp->v_size = ip->i_size; 719 *vpp = vp; 720 return (0); 721 } 722 723 /* 724 * Vnode pointer to File handle 725 */ 726 /* ARGSUSED */ 727 int 728 filecore_vptofh(vp, fhp) 729 struct vnode *vp; 730 struct fid *fhp; 731 { 732 struct filecore_node *ip = VTOI(vp); 733 struct ifid *ifhp; 734 735 ifhp = (struct ifid *)fhp; 736 ifhp->ifid_len = sizeof(struct ifid); 737 ifhp->ifid_ino = ip->i_number; 738 return 0; 739 } 740 741 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 742 { 743 744 sysctl_createv(clog, 0, NULL, NULL, 745 CTLFLAG_PERMANENT, 746 CTLTYPE_NODE, "vfs", NULL, 747 NULL, 0, NULL, 0, 748 CTL_VFS, CTL_EOL); 749 sysctl_createv(clog, 0, NULL, NULL, 750 CTLFLAG_PERMANENT, 751 CTLTYPE_NODE, "filecore", 752 SYSCTL_DESCR("Acorn FILECORE file system"), 753 NULL, 0, NULL, 0, 754 CTL_VFS, 19, CTL_EOL); 755 /* 756 * XXX the "19" above could be dynamic, thereby eliminating 757 * one more instance of the "number to vfs" mapping problem, 758 * but "19" is the order as taken from sys/mount.h 759 */ 760 } 761
Indexes created Wed Oct 01 12:09:54 GMT 2025