filecore_vfsops.c revision 1.50
1 /* $NetBSD: filecore_vfsops.c,v 1.50 2008/04/29 18:18:08 ad 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 1.50 2008/04/29 18:18:08 ad 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/genfs/genfs.h> 81 #include <miscfs/specfs/specdev.h> 82 #include <sys/mount.h> 83 #include <sys/buf.h> 84 #include <sys/file.h> 85 #include <sys/device.h> 86 #include <sys/errno.h> 87 #include <sys/malloc.h> 88 #include <sys/pool.h> 89 #include <sys/conf.h> 90 #include <sys/sysctl.h> 91 #include <sys/kauth.h> 92 93 #include <fs/filecorefs/filecore.h> 94 #include <fs/filecorefs/filecore_extern.h> 95 #include <fs/filecorefs/filecore_node.h> 96 #include <fs/filecorefs/filecore_mount.h> 97 98 MALLOC_JUSTDEFINE(M_FILECOREMNT, 99 "filecore mount", "Filecore FS mount structures"); 100 MALLOC_JUSTDEFINE(M_FILECORETMP, 101 "filecore temp", "Filecore FS temporary structures"); 102 103 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 104 105 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 106 &filecore_vnodeop_opv_desc, 107 NULL, 108 }; 109 110 struct vfsops filecore_vfsops = { 111 MOUNT_FILECORE, 112 sizeof (struct filecore_args), 113 filecore_mount, 114 filecore_start, 115 filecore_unmount, 116 filecore_root, 117 (void *)eopnotsupp, /* vfs_quotactl */ 118 filecore_statvfs, 119 filecore_sync, 120 filecore_vget, 121 filecore_fhtovp, 122 filecore_vptofh, 123 filecore_init, 124 filecore_reinit, 125 filecore_done, 126 NULL, /* filecore_mountroot */ 127 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 128 vfs_stdextattrctl, 129 (void *)eopnotsupp, /* vfs_suspendctl */ 130 genfs_renamelock_enter, 131 genfs_renamelock_exit, 132 (void *)eopnotsupp, 133 filecore_vnodeopv_descs, 134 0, 135 { NULL, NULL } 136 }; 137 VFS_ATTACH(filecore_vfsops); 138 139 static const struct genfs_ops filecore_genfsops = { 140 .gop_size = genfs_size, 141 }; 142 143 /* 144 * Called by vfs_mountroot when iso is going to be mounted as root. 145 * 146 * Name is updated by mount(8) after booting. 147 */ 148 149 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 150 struct lwp *l, struct filecore_args *argp)); 151 152 #if 0 153 int 154 filecore_mountroot() 155 { 156 struct mount *mp; 157 extern struct vnode *rootvp; 158 struct proc *p = curproc; /* XXX */ 159 int error; 160 struct filecore_args args; 161 162 if (device_class(root_device) != DV_DISK) 163 return (ENODEV); 164 165 /* 166 * Get vnodes for swapdev and rootdev. 167 */ 168 if (bdevvp(rootdev, &rootvp)) 169 panic("filecore_mountroot: can't setup rootvp"); 170 171 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 172 return (error); 173 174 args.flags = FILECOREMNT_ROOT; 175 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 176 vfs_unbusy(mp, false); 177 vfs_destroy(mp); 178 return (error); 179 } 180 simple_lock(&mountlist_slock); 181 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 182 simple_unlock(&mountlist_slock); 183 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 184 vfs_unbusy(mp, false); 185 return (0); 186 } 187 #endif 188 189 /* 190 * VFS Operations. 191 * 192 * mount system call 193 */ 194 int 195 filecore_mount(mp, path, data, data_len) 196 struct mount *mp; 197 const char *path; 198 void *data; 199 size_t *data_len; 200 { 201 struct lwp *l = curlwp; 202 struct nameidata nd; 203 struct vnode *devvp; 204 struct filecore_args *args = data; 205 int error; 206 struct filecore_mnt *fcmp = NULL; 207 208 if (*data_len < sizeof *args) 209 return EINVAL; 210 211 if (mp->mnt_flag & MNT_GETARGS) { 212 fcmp = VFSTOFILECORE(mp); 213 if (fcmp == NULL) 214 return EIO; 215 args->flags = fcmp->fc_mntflags; 216 args->uid = fcmp->fc_uid; 217 args->gid = fcmp->fc_gid; 218 args->fspec = NULL; 219 *data_len = sizeof *args; 220 return 0; 221 } 222 223 if ((mp->mnt_flag & MNT_RDONLY) == 0) 224 return (EROFS); 225 226 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 227 return EINVAL; 228 229 /* 230 * Not an update, or updating the name: look up the name 231 * and verify that it refers to a sensible block device. 232 */ 233 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 234 if ((error = namei(&nd)) != 0) 235 return (error); 236 devvp = nd.ni_vp; 237 238 if (devvp->v_type != VBLK) { 239 vrele(devvp); 240 return ENOTBLK; 241 } 242 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 243 vrele(devvp); 244 return ENXIO; 245 } 246 /* 247 * If mount by non-root, then verify that user has necessary 248 * permissions on the device. 249 */ 250 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 251 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 252 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 253 VOP_UNLOCK(devvp, 0); 254 if (error) { 255 vrele(devvp); 256 return (error); 257 } 258 } 259 if ((mp->mnt_flag & MNT_UPDATE) == 0) 260 error = filecore_mountfs(devvp, mp, l, args); 261 else { 262 if (devvp != fcmp->fc_devvp) 263 error = EINVAL; /* needs translation */ 264 else 265 vrele(devvp); 266 } 267 if (error) { 268 vrele(devvp); 269 return error; 270 } 271 fcmp = VFSTOFILECORE(mp); 272 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 273 mp->mnt_op->vfs_name, mp, l); 274 } 275 276 /* 277 * Common code for mount and mountroot 278 */ 279 static int 280 filecore_mountfs(devvp, mp, l, argp) 281 struct vnode *devvp; 282 struct mount *mp; 283 struct lwp *l; 284 struct filecore_args *argp; 285 { 286 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 287 struct buf *bp = NULL; 288 dev_t dev = devvp->v_rdev; 289 int error = EINVAL; 290 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 291 struct filecore_disc_record *fcdr; 292 unsigned map; 293 unsigned log2secsize; 294 295 if (!ronly) 296 return EROFS; 297 298 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 299 return (error); 300 301 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 302 if (error) 303 return error; 304 305 /* Read the filecore boot block to check FS validity and to find the map */ 306 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 307 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 308 #ifdef FILECORE_DEBUG_BR 309 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 310 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 311 bp, error); 312 #endif 313 if (error != 0) 314 goto out; 315 316 KASSERT(bp != NULL); 317 if (filecore_bbchecksum(bp->b_data) != 0) { 318 error = EINVAL; 319 goto out; 320 } 321 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 322 FILECORE_BB_DISCREC); 323 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 324 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 325 << fcdr->log2bpmb) >> fcdr->log2secsize; 326 log2secsize = fcdr->log2secsize; 327 #ifdef FILECORE_DEBUG_BR 328 printf("brelse(%p) vf1\n", bp); 329 #endif 330 brelse(bp, BC_AGE); 331 bp = NULL; 332 333 /* Read the bootblock in the map */ 334 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 335 #ifdef FILECORE_DEBUG_BR 336 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 337 map, 1 << log2secsize, bp, error); 338 #endif 339 if (error != 0) 340 goto out; 341 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 342 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 343 memset(fcmp, 0, sizeof *fcmp); 344 if (fcdr->log2bpmb > fcdr->log2secsize) 345 fcmp->log2bsize = fcdr->log2bpmb; 346 else fcmp->log2bsize = fcdr->log2secsize; 347 fcmp->blksize = 1 << fcmp->log2bsize; 348 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 349 fcmp->map = map; 350 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 351 / (fcdr->idlen + 1); 352 fcmp->mask = (1 << fcdr->idlen) - 1; 353 if (fcdr->big_flag & 1) { 354 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 355 + fcdr->disc_size) / fcmp->blksize; 356 } else { 357 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 358 } 359 360 #ifdef FILECORE_DEBUG_BR 361 printf("brelse(%p) vf2\n", bp); 362 #endif 363 brelse(bp, BC_AGE); 364 bp = NULL; 365 366 mp->mnt_data = fcmp; 367 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 368 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 369 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 370 mp->mnt_stat.f_namemax = 10; 371 mp->mnt_flag |= MNT_LOCAL; 372 mp->mnt_dev_bshift = fcdr->log2secsize; 373 mp->mnt_fs_bshift = fcmp->log2bsize; 374 375 fcmp->fc_mountp = mp; 376 fcmp->fc_dev = dev; 377 fcmp->fc_devvp = devvp; 378 fcmp->fc_mntflags = argp->flags; 379 if (argp->flags & FILECOREMNT_USEUID) { 380 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 381 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 382 } else { 383 fcmp->fc_uid = argp->uid; 384 fcmp->fc_gid = argp->gid; 385 } 386 387 return 0; 388 out: 389 if (bp) { 390 #ifdef FILECORE_DEBUG_BR 391 printf("brelse(%p) vf3\n", bp); 392 #endif 393 brelse(bp, 0); 394 } 395 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 396 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 397 VOP_UNLOCK(devvp, 0); 398 return error; 399 } 400 401 /* 402 * Make a filesystem operational. 403 * Nothing to do at the moment. 404 */ 405 /* ARGSUSED */ 406 int 407 filecore_start(mp, flags) 408 struct mount *mp; 409 int flags; 410 { 411 return 0; 412 } 413 414 /* 415 * unmount system call 416 */ 417 int 418 filecore_unmount(mp, mntflags) 419 struct mount *mp; 420 int mntflags; 421 { 422 struct filecore_mnt *fcmp; 423 int error, flags = 0; 424 425 if (mntflags & MNT_FORCE) 426 flags |= FORCECLOSE; 427 if ((error = vflush(mp, NULLVP, flags)) != 0) 428 return (error); 429 430 fcmp = VFSTOFILECORE(mp); 431 432 if (fcmp->fc_devvp->v_type != VBAD) 433 fcmp->fc_devvp->v_specmountpoint = NULL; 434 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 435 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 436 vput(fcmp->fc_devvp); 437 free(fcmp, M_FILECOREMNT); 438 mp->mnt_data = NULL; 439 mp->mnt_flag &= ~MNT_LOCAL; 440 return (error); 441 } 442 443 /* 444 * Return root of a filesystem 445 */ 446 int 447 filecore_root(mp, vpp) 448 struct mount *mp; 449 struct vnode **vpp; 450 { 451 struct vnode *nvp; 452 int error; 453 454 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 455 return (error); 456 *vpp = nvp; 457 return (0); 458 } 459 460 /* 461 * Get file system statistics. 462 */ 463 int 464 filecore_statvfs(mp, sbp) 465 struct mount *mp; 466 struct statvfs *sbp; 467 { 468 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 469 470 sbp->f_bsize = fcmp->blksize; 471 sbp->f_frsize = sbp->f_bsize; /* XXX */ 472 sbp->f_iosize = sbp->f_bsize; /* XXX */ 473 sbp->f_blocks = fcmp->nblks; 474 sbp->f_bfree = 0; /* total free blocks */ 475 sbp->f_bavail = 0; /* blocks free for non superuser */ 476 sbp->f_bresvd = 0; /* reserved blocks */ 477 sbp->f_files = 0; /* total files */ 478 sbp->f_ffree = 0; /* free file nodes for non superuser */ 479 sbp->f_favail = 0; /* free file nodes */ 480 sbp->f_fresvd = 0; /* reserved file nodes */ 481 copy_statvfs_info(sbp, mp); 482 return 0; 483 } 484 485 /* ARGSUSED */ 486 int 487 filecore_sync(mp, waitfor, cred) 488 struct mount *mp; 489 int waitfor; 490 kauth_cred_t cred; 491 { 492 return (0); 493 } 494 495 /* 496 * File handle to vnode 497 * 498 * Have to be really careful about stale file handles: 499 * - check that the inode number is in range 500 * - call iget() to get the locked inode 501 * - check for an unallocated inode (i_mode == 0) 502 * - check that the generation number matches 503 */ 504 505 struct ifid { 506 ushort ifid_len; 507 ushort ifid_pad; 508 u_int32_t ifid_ino; 509 }; 510 511 /* ARGSUSED */ 512 int 513 filecore_fhtovp(mp, fhp, vpp) 514 struct mount *mp; 515 struct fid *fhp; 516 struct vnode **vpp; 517 { 518 struct ifid ifh; 519 struct vnode *nvp; 520 struct filecore_node *ip; 521 int error; 522 523 if (fhp->fid_len != sizeof(struct ifid)) 524 return EINVAL; 525 526 memcpy(&ifh, fhp, sizeof(ifh)); 527 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 528 *vpp = NULLVP; 529 return (error); 530 } 531 ip = VTOI(nvp); 532 if (filecore_staleinode(ip)) { 533 vput(nvp); 534 *vpp = NULLVP; 535 return (ESTALE); 536 } 537 *vpp = nvp; 538 return (0); 539 } 540 541 /* This looks complicated. Look at other vgets as well as the iso9660 one. 542 * 543 * The filecore inode number is made up of 1 byte directory entry index and 544 * 3 bytes of the internal disc address of the directory. On a read-only 545 * filesystem this is unique. For a read-write version we may not be able to 546 * do vget, see msdosfs. 547 */ 548 549 int 550 filecore_vget(mp, ino, vpp) 551 struct mount *mp; 552 ino_t ino; 553 struct vnode **vpp; 554 { 555 struct filecore_mnt *fcmp; 556 struct filecore_node *ip; 557 struct buf *bp; 558 struct vnode *vp; 559 dev_t dev; 560 int error; 561 562 fcmp = VFSTOFILECORE(mp); 563 dev = fcmp->fc_dev; 564 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 565 return (0); 566 567 /* Allocate a new vnode/filecore_node. */ 568 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 569 != 0) { 570 *vpp = NULLVP; 571 return (error); 572 } 573 ip = pool_get(&filecore_node_pool, PR_WAITOK); 574 memset(ip, 0, sizeof(struct filecore_node)); 575 vp->v_data = ip; 576 ip->i_vnode = vp; 577 ip->i_dev = dev; 578 ip->i_number = ino; 579 ip->i_block = -1; 580 ip->i_parent = -2; 581 genfs_node_init(vp, &filecore_genfsops); 582 583 /* 584 * Put it onto its hash chain and lock it so that other requests for 585 * this inode will block if they arrive while we are sleeping waiting 586 * for old data structures to be purged or for the contents of the 587 * disk portion of this inode to be read. 588 */ 589 filecore_ihashins(ip); 590 591 if (ino == FILECORE_ROOTINO) { 592 /* Here we need to construct a root directory inode */ 593 memcpy(ip->i_dirent.name, "root", 4); 594 ip->i_dirent.load = 0; 595 ip->i_dirent.exec = 0; 596 ip->i_dirent.len = FILECORE_DIR_SIZE; 597 ip->i_dirent.addr = fcmp->drec.root; 598 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 599 600 } else { 601 /* Read in Data from Directory Entry */ 602 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 603 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 604 vput(vp); 605 #ifdef FILECORE_DEBUG_BR 606 printf("brelse(%p) vf4\n", bp); 607 #endif 608 brelse(bp, 0); 609 *vpp = NULL; 610 return (error); 611 } 612 613 memcpy(&ip->i_dirent, 614 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 615 sizeof(struct filecore_direntry)); 616 #ifdef FILECORE_DEBUG_BR 617 printf("brelse(%p) vf5\n", bp); 618 #endif 619 brelse(bp, 0); 620 } 621 622 ip->i_mnt = fcmp; 623 ip->i_devvp = fcmp->fc_devvp; 624 ip->i_diroff = 0; 625 VREF(ip->i_devvp); 626 627 /* 628 * Setup type 629 */ 630 vp->v_type = VREG; 631 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 632 vp->v_type = VDIR; 633 634 /* 635 * Initialize the associated vnode 636 */ 637 switch (vp->v_type) { 638 case VFIFO: 639 case VCHR: 640 case VBLK: 641 /* 642 * Devices not supported. 643 */ 644 vput(vp); 645 return (EOPNOTSUPP); 646 case VLNK: 647 case VNON: 648 case VSOCK: 649 case VDIR: 650 case VBAD: 651 case VREG: 652 break; 653 } 654 655 if (ino == FILECORE_ROOTINO) 656 vp->v_vflag |= VV_ROOT; 657 658 /* 659 * XXX need generation number? 660 */ 661 662 uvm_vnp_setsize(vp, ip->i_size); 663 *vpp = vp; 664 return (0); 665 } 666 667 /* 668 * Vnode pointer to File handle 669 */ 670 /* ARGSUSED */ 671 int 672 filecore_vptofh(vp, fhp, fh_size) 673 struct vnode *vp; 674 struct fid *fhp; 675 size_t *fh_size; 676 { 677 struct filecore_node *ip = VTOI(vp); 678 struct ifid ifh; 679 680 if (*fh_size < sizeof(struct ifid)) { 681 *fh_size = sizeof(struct ifid); 682 return E2BIG; 683 } 684 memset(&ifh, 0, sizeof(ifh)); 685 ifh.ifid_len = sizeof(struct ifid); 686 ifh.ifid_ino = ip->i_number; 687 memcpy(fhp, &ifh, sizeof(ifh)); 688 return 0; 689 } 690 691 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 692 { 693 694 sysctl_createv(clog, 0, NULL, NULL, 695 CTLFLAG_PERMANENT, 696 CTLTYPE_NODE, "vfs", NULL, 697 NULL, 0, NULL, 0, 698 CTL_VFS, CTL_EOL); 699 sysctl_createv(clog, 0, NULL, NULL, 700 CTLFLAG_PERMANENT, 701 CTLTYPE_NODE, "filecore", 702 SYSCTL_DESCR("Acorn FILECORE file system"), 703 NULL, 0, NULL, 0, 704 CTL_VFS, 19, CTL_EOL); 705 /* 706 * XXX the "19" above could be dynamic, thereby eliminating 707 * one more instance of the "number to vfs" mapping problem, 708 * but "19" is the order as taken from sys/mount.h 709 */ 710 } 711
Indexes created Wed Oct 01 12:09:54 GMT 2025