filecore_vfsops.c revision 1.43.4.1
1 /* $NetBSD: filecore_vfsops.c,v 1.43.4.1 2007/12/08 18:20:14 mjf 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 1.43.4.1 2007/12/08 18:20:14 mjf 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 #include <sys/kauth.h> 91 92 #include <fs/filecorefs/filecore.h> 93 #include <fs/filecorefs/filecore_extern.h> 94 #include <fs/filecorefs/filecore_node.h> 95 #include <fs/filecorefs/filecore_mount.h> 96 97 MALLOC_JUSTDEFINE(M_FILECOREMNT, 98 "filecore mount", "Filecore FS mount structures"); 99 MALLOC_JUSTDEFINE(M_FILECORETMP, 100 "filecore temp", "Filecore FS temporary structures"); 101 102 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 103 104 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 105 &filecore_vnodeop_opv_desc, 106 NULL, 107 }; 108 109 struct vfsops filecore_vfsops = { 110 MOUNT_FILECORE, 111 sizeof (struct filecore_args), 112 filecore_mount, 113 filecore_start, 114 filecore_unmount, 115 filecore_root, 116 (void *)eopnotsupp, /* vfs_quotactl */ 117 filecore_statvfs, 118 filecore_sync, 119 filecore_vget, 120 filecore_fhtovp, 121 filecore_vptofh, 122 filecore_init, 123 filecore_reinit, 124 filecore_done, 125 NULL, /* filecore_mountroot */ 126 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 127 vfs_stdextattrctl, 128 (void *)eopnotsupp, /* vfs_suspendctl */ 129 filecore_vnodeopv_descs, 130 0, 131 { NULL, NULL } 132 }; 133 VFS_ATTACH(filecore_vfsops); 134 135 static const struct genfs_ops filecore_genfsops = { 136 .gop_size = genfs_size, 137 }; 138 139 /* 140 * Called by vfs_mountroot when iso is going to be mounted as root. 141 * 142 * Name is updated by mount(8) after booting. 143 */ 144 145 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 146 struct lwp *l, struct filecore_args *argp)); 147 148 #if 0 149 int 150 filecore_mountroot() 151 { 152 struct mount *mp; 153 extern struct vnode *rootvp; 154 struct proc *p = curproc; /* XXX */ 155 int error; 156 struct filecore_args args; 157 158 if (device_class(root_device) != DV_DISK) 159 return (ENODEV); 160 161 /* 162 * Get vnodes for swapdev and rootdev. 163 */ 164 if (bdevvp(rootdev, &rootvp)) 165 panic("filecore_mountroot: can't setup rootvp"); 166 167 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 168 return (error); 169 170 args.flags = FILECOREMNT_ROOT; 171 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 172 mp->mnt_op->vfs_refcount--; 173 vfs_unbusy(mp); 174 vfs_destroy(mp); 175 return (error); 176 } 177 simple_lock(&mountlist_slock); 178 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 179 simple_unlock(&mountlist_slock); 180 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 181 vfs_unbusy(mp); 182 return (0); 183 } 184 #endif 185 186 /* 187 * VFS Operations. 188 * 189 * mount system call 190 */ 191 int 192 filecore_mount(mp, path, data, data_len) 193 struct mount *mp; 194 const char *path; 195 void *data; 196 size_t *data_len; 197 { 198 struct lwp *l = curlwp; 199 struct nameidata nd; 200 struct vnode *devvp; 201 struct filecore_args *args = data; 202 int error; 203 struct filecore_mnt *fcmp = NULL; 204 205 if (*data_len < sizeof *args) 206 return EINVAL; 207 208 if (mp->mnt_flag & MNT_GETARGS) { 209 fcmp = VFSTOFILECORE(mp); 210 if (fcmp == NULL) 211 return EIO; 212 args->flags = fcmp->fc_mntflags; 213 args->uid = fcmp->fc_uid; 214 args->gid = fcmp->fc_gid; 215 args->fspec = NULL; 216 *data_len = sizeof *args; 217 return 0; 218 } 219 220 if ((mp->mnt_flag & MNT_RDONLY) == 0) 221 return (EROFS); 222 223 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 224 return EINVAL; 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(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l); 231 if ((error = namei(&nd)) != 0) 232 return (error); 233 devvp = nd.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 (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 248 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 249 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 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->mnt_op->vfs_name, 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_cred, l, 0, 0)) 307 != 0) 308 return (error); 309 310 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 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; 324 325 KASSERT(bp != NULL); 326 if (filecore_bbchecksum(bp->b_data) != 0) { 327 error = EINVAL; 328 goto out; 329 } 330 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 331 FILECORE_BB_DISCREC); 332 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 333 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 334 << fcdr->log2bpmb) >> fcdr->log2secsize; 335 log2secsize = fcdr->log2secsize; 336 #ifdef FILECORE_DEBUG_BR 337 printf("brelse(%p) vf1\n", bp); 338 #endif 339 brelse(bp, BC_AGE); 340 bp = NULL; 341 342 /* Read the bootblock in the map */ 343 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 344 #ifdef FILECORE_DEBUG_BR 345 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 346 map, 1 << log2secsize, bp, error); 347 #endif 348 if (error != 0) 349 goto out; 350 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 351 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 352 memset(fcmp, 0, sizeof *fcmp); 353 if (fcdr->log2bpmb > fcdr->log2secsize) 354 fcmp->log2bsize = fcdr->log2bpmb; 355 else fcmp->log2bsize = fcdr->log2secsize; 356 fcmp->blksize = 1 << fcmp->log2bsize; 357 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 358 fcmp->map = map; 359 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 360 / (fcdr->idlen + 1); 361 fcmp->mask = (1 << fcdr->idlen) - 1; 362 if (fcdr->big_flag & 1) { 363 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 364 + fcdr->disc_size) / fcmp->blksize; 365 } else { 366 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 367 } 368 369 #ifdef FILECORE_DEBUG_BR 370 printf("brelse(%p) vf2\n", bp); 371 #endif 372 brelse(bp, BC_AGE); 373 bp = NULL; 374 375 mp->mnt_data = fcmp; 376 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 377 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 378 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 379 mp->mnt_stat.f_namemax = 10; 380 mp->mnt_flag |= MNT_LOCAL; 381 mp->mnt_dev_bshift = fcdr->log2secsize; 382 mp->mnt_fs_bshift = fcmp->log2bsize; 383 384 fcmp->fc_mountp = mp; 385 fcmp->fc_dev = dev; 386 fcmp->fc_devvp = devvp; 387 fcmp->fc_mntflags = argp->flags; 388 if (argp->flags & FILECOREMNT_USEUID) { 389 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 390 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 391 } else { 392 fcmp->fc_uid = argp->uid; 393 fcmp->fc_gid = argp->gid; 394 } 395 396 return 0; 397 out: 398 if (bp) { 399 #ifdef FILECORE_DEBUG_BR 400 printf("brelse(%p) vf3\n", bp); 401 #endif 402 brelse(bp, 0); 403 } 404 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 405 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 406 VOP_UNLOCK(devvp, 0); 407 return error; 408 } 409 410 /* 411 * Make a filesystem operational. 412 * Nothing to do at the moment. 413 */ 414 /* ARGSUSED */ 415 int 416 filecore_start(mp, flags) 417 struct mount *mp; 418 int flags; 419 { 420 return 0; 421 } 422 423 /* 424 * unmount system call 425 */ 426 int 427 filecore_unmount(mp, mntflags) 428 struct mount *mp; 429 int mntflags; 430 { 431 struct filecore_mnt *fcmp; 432 int error, flags = 0; 433 434 if (mntflags & MNT_FORCE) 435 flags |= FORCECLOSE; 436 if ((error = vflush(mp, NULLVP, flags)) != 0) 437 return (error); 438 439 fcmp = VFSTOFILECORE(mp); 440 441 if (fcmp->fc_devvp->v_type != VBAD) 442 fcmp->fc_devvp->v_specmountpoint = NULL; 443 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 444 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 445 vput(fcmp->fc_devvp); 446 free(fcmp, M_FILECOREMNT); 447 mp->mnt_data = NULL; 448 mp->mnt_flag &= ~MNT_LOCAL; 449 return (error); 450 } 451 452 /* 453 * Return root of a filesystem 454 */ 455 int 456 filecore_root(mp, vpp) 457 struct mount *mp; 458 struct vnode **vpp; 459 { 460 struct vnode *nvp; 461 int error; 462 463 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 464 return (error); 465 *vpp = nvp; 466 return (0); 467 } 468 469 /* 470 * Get file system statistics. 471 */ 472 int 473 filecore_statvfs(mp, sbp) 474 struct mount *mp; 475 struct statvfs *sbp; 476 { 477 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 478 479 sbp->f_bsize = fcmp->blksize; 480 sbp->f_frsize = sbp->f_bsize; /* XXX */ 481 sbp->f_iosize = sbp->f_bsize; /* XXX */ 482 sbp->f_blocks = fcmp->nblks; 483 sbp->f_bfree = 0; /* total free blocks */ 484 sbp->f_bavail = 0; /* blocks free for non superuser */ 485 sbp->f_bresvd = 0; /* reserved blocks */ 486 sbp->f_files = 0; /* total files */ 487 sbp->f_ffree = 0; /* free file nodes for non superuser */ 488 sbp->f_favail = 0; /* free file nodes */ 489 sbp->f_fresvd = 0; /* reserved file nodes */ 490 copy_statvfs_info(sbp, mp); 491 return 0; 492 } 493 494 /* ARGSUSED */ 495 int 496 filecore_sync(mp, waitfor, cred) 497 struct mount *mp; 498 int waitfor; 499 kauth_cred_t cred; 500 { 501 return (0); 502 } 503 504 /* 505 * File handle to vnode 506 * 507 * Have to be really careful about stale file handles: 508 * - check that the inode number is in range 509 * - call iget() to get the locked inode 510 * - check for an unallocated inode (i_mode == 0) 511 * - check that the generation number matches 512 */ 513 514 struct ifid { 515 ushort ifid_len; 516 ushort ifid_pad; 517 u_int32_t ifid_ino; 518 }; 519 520 /* ARGSUSED */ 521 int 522 filecore_fhtovp(mp, fhp, vpp) 523 struct mount *mp; 524 struct fid *fhp; 525 struct vnode **vpp; 526 { 527 struct ifid ifh; 528 struct vnode *nvp; 529 struct filecore_node *ip; 530 int error; 531 532 if (fhp->fid_len != sizeof(struct ifid)) 533 return EINVAL; 534 535 memcpy(&ifh, fhp, sizeof(ifh)); 536 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 537 *vpp = NULLVP; 538 return (error); 539 } 540 ip = VTOI(nvp); 541 if (filecore_staleinode(ip)) { 542 vput(nvp); 543 *vpp = NULLVP; 544 return (ESTALE); 545 } 546 *vpp = nvp; 547 return (0); 548 } 549 550 /* This looks complicated. Look at other vgets as well as the iso9660 one. 551 * 552 * The filecore inode number is made up of 1 byte directory entry index and 553 * 3 bytes of the internal disc address of the directory. On a read-only 554 * filesystem this is unique. For a read-write version we may not be able to 555 * do vget, see msdosfs. 556 */ 557 558 int 559 filecore_vget(mp, ino, vpp) 560 struct mount *mp; 561 ino_t ino; 562 struct vnode **vpp; 563 { 564 struct filecore_mnt *fcmp; 565 struct filecore_node *ip; 566 struct buf *bp; 567 struct vnode *vp; 568 dev_t dev; 569 int error; 570 571 fcmp = VFSTOFILECORE(mp); 572 dev = fcmp->fc_dev; 573 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 574 return (0); 575 576 /* Allocate a new vnode/filecore_node. */ 577 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 578 != 0) { 579 *vpp = NULLVP; 580 return (error); 581 } 582 ip = pool_get(&filecore_node_pool, PR_WAITOK); 583 memset(ip, 0, sizeof(struct filecore_node)); 584 vp->v_data = ip; 585 ip->i_vnode = vp; 586 ip->i_dev = dev; 587 ip->i_number = ino; 588 ip->i_block = -1; 589 ip->i_parent = -2; 590 591 /* 592 * Put it onto its hash chain and lock it so that other requests for 593 * this inode will block if they arrive while we are sleeping waiting 594 * for old data structures to be purged or for the contents of the 595 * disk portion of this inode to be read. 596 */ 597 filecore_ihashins(ip); 598 599 if (ino == FILECORE_ROOTINO) { 600 /* Here we need to construct a root directory inode */ 601 memcpy(ip->i_dirent.name, "root", 4); 602 ip->i_dirent.load = 0; 603 ip->i_dirent.exec = 0; 604 ip->i_dirent.len = FILECORE_DIR_SIZE; 605 ip->i_dirent.addr = fcmp->drec.root; 606 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 607 608 } else { 609 /* Read in Data from Directory Entry */ 610 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 611 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 612 vput(vp); 613 #ifdef FILECORE_DEBUG_BR 614 printf("brelse(%p) vf4\n", bp); 615 #endif 616 brelse(bp, 0); 617 *vpp = NULL; 618 return (error); 619 } 620 621 memcpy(&ip->i_dirent, 622 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 623 sizeof(struct filecore_direntry)); 624 #ifdef FILECORE_DEBUG_BR 625 printf("brelse(%p) vf5\n", bp); 626 #endif 627 brelse(bp, 0); 628 } 629 630 ip->i_mnt = fcmp; 631 ip->i_devvp = fcmp->fc_devvp; 632 ip->i_diroff = 0; 633 VREF(ip->i_devvp); 634 635 /* 636 * Setup type 637 */ 638 vp->v_type = VREG; 639 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 640 vp->v_type = VDIR; 641 642 /* 643 * Initialize the associated vnode 644 */ 645 switch (vp->v_type) { 646 case VFIFO: 647 case VCHR: 648 case VBLK: 649 /* 650 * Devices not supported. 651 */ 652 vput(vp); 653 return (EOPNOTSUPP); 654 case VLNK: 655 case VNON: 656 case VSOCK: 657 case VDIR: 658 case VBAD: 659 case VREG: 660 break; 661 } 662 663 if (ino == FILECORE_ROOTINO) 664 vp->v_vflag |= VV_ROOT; 665 666 /* 667 * XXX need generation number? 668 */ 669 670 genfs_node_init(vp, &filecore_genfsops); 671 uvm_vnp_setsize(vp, ip->i_size); 672 *vpp = vp; 673 return (0); 674 } 675 676 /* 677 * Vnode pointer to File handle 678 */ 679 /* ARGSUSED */ 680 int 681 filecore_vptofh(vp, fhp, fh_size) 682 struct vnode *vp; 683 struct fid *fhp; 684 size_t *fh_size; 685 { 686 struct filecore_node *ip = VTOI(vp); 687 struct ifid ifh; 688 689 if (*fh_size < sizeof(struct ifid)) { 690 *fh_size = sizeof(struct ifid); 691 return E2BIG; 692 } 693 memset(&ifh, 0, sizeof(ifh)); 694 ifh.ifid_len = sizeof(struct ifid); 695 ifh.ifid_ino = ip->i_number; 696 memcpy(fhp, &ifh, sizeof(ifh)); 697 return 0; 698 } 699 700 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 701 { 702 703 sysctl_createv(clog, 0, NULL, NULL, 704 CTLFLAG_PERMANENT, 705 CTLTYPE_NODE, "vfs", NULL, 706 NULL, 0, NULL, 0, 707 CTL_VFS, CTL_EOL); 708 sysctl_createv(clog, 0, NULL, NULL, 709 CTLFLAG_PERMANENT, 710 CTLTYPE_NODE, "filecore", 711 SYSCTL_DESCR("Acorn FILECORE file system"), 712 NULL, 0, NULL, 0, 713 CTL_VFS, 19, CTL_EOL); 714 /* 715 * XXX the "19" above could be dynamic, thereby eliminating 716 * one more instance of the "number to vfs" mapping problem, 717 * but "19" is the order as taken from sys/mount.h 718 */ 719 } 720
Indexes created Wed Oct 01 12:09:54 GMT 2025