filecore_vfsops.c revision 1.31
1 /* $NetBSD: filecore_vfsops.c,v 1.31 2007/01/19 14:49:09 hannken 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 1.31 2007/01/19 14:49:09 hannken 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_DEFINE(M_FILECOREMNT, "filecore mount", "Filecore FS mount structures"); 98 99 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 100 101 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 102 &filecore_vnodeop_opv_desc, 103 NULL, 104 }; 105 106 struct vfsops filecore_vfsops = { 107 MOUNT_FILECORE, 108 filecore_mount, 109 filecore_start, 110 filecore_unmount, 111 filecore_root, 112 filecore_quotactl, 113 filecore_statvfs, 114 filecore_sync, 115 filecore_vget, 116 filecore_fhtovp, 117 filecore_vptofh, 118 filecore_init, 119 filecore_reinit, 120 filecore_done, 121 NULL, /* filecore_mountroot */ 122 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 123 vfs_stdextattrctl, 124 vfs_stdsuspendctl, 125 filecore_vnodeopv_descs, 126 0, 127 { NULL, NULL } 128 }; 129 VFS_ATTACH(filecore_vfsops); 130 131 static const struct genfs_ops filecore_genfsops = { 132 .gop_size = genfs_size, 133 }; 134 135 /* 136 * Called by vfs_mountroot when iso is going to be mounted as root. 137 * 138 * Name is updated by mount(8) after booting. 139 */ 140 141 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 142 struct lwp *l, struct filecore_args *argp)); 143 144 #if 0 145 int 146 filecore_mountroot() 147 { 148 struct mount *mp; 149 extern struct vnode *rootvp; 150 struct proc *p = curproc; /* XXX */ 151 int error; 152 struct filecore_args args; 153 154 if (device_class(root_device) != DV_DISK) 155 return (ENODEV); 156 157 /* 158 * Get vnodes for swapdev and rootdev. 159 */ 160 if (bdevvp(rootdev, &rootvp)) 161 panic("filecore_mountroot: can't setup rootvp"); 162 163 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 164 return (error); 165 166 args.flags = FILECOREMNT_ROOT; 167 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 168 mp->mnt_op->vfs_refcount--; 169 vfs_unbusy(mp); 170 free(mp, M_MOUNT); 171 return (error); 172 } 173 simple_lock(&mountlist_slock); 174 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 175 simple_unlock(&mountlist_slock); 176 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 177 vfs_unbusy(mp); 178 return (0); 179 } 180 #endif 181 182 /* 183 * VFS Operations. 184 * 185 * mount system call 186 */ 187 int 188 filecore_mount(mp, path, data, ndp, l) 189 struct mount *mp; 190 const char *path; 191 void *data; 192 struct nameidata *ndp; 193 struct lwp *l; 194 { 195 struct vnode *devvp; 196 struct filecore_args args; 197 int error; 198 struct filecore_mnt *fcmp = NULL; 199 200 if (mp->mnt_flag & MNT_GETARGS) { 201 fcmp = VFSTOFILECORE(mp); 202 if (fcmp == NULL) 203 return EIO; 204 args.flags = fcmp->fc_mntflags; 205 args.uid = fcmp->fc_uid; 206 args.gid = fcmp->fc_gid; 207 args.fspec = NULL; 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 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 218 return EINVAL; 219 220 /* 221 * Not an update, or updating the name: look up the name 222 * and verify that it refers to a sensible block device. 223 */ 224 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 225 if ((error = namei(ndp)) != 0) 226 return (error); 227 devvp = ndp->ni_vp; 228 229 if (devvp->v_type != VBLK) { 230 vrele(devvp); 231 return ENOTBLK; 232 } 233 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 234 vrele(devvp); 235 return ENXIO; 236 } 237 /* 238 * If mount by non-root, then verify that user has necessary 239 * permissions on the device. 240 */ 241 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 242 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 243 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 244 VOP_UNLOCK(devvp, 0); 245 if (error) { 246 vrele(devvp); 247 return (error); 248 } 249 } 250 if ((mp->mnt_flag & MNT_UPDATE) == 0) 251 error = filecore_mountfs(devvp, mp, l, &args); 252 else { 253 if (devvp != fcmp->fc_devvp) 254 error = EINVAL; /* needs translation */ 255 else 256 vrele(devvp); 257 } 258 if (error) { 259 vrele(devvp); 260 return error; 261 } 262 fcmp = VFSTOFILECORE(mp); 263 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 264 mp, l); 265 } 266 267 /* 268 * Common code for mount and mountroot 269 */ 270 static int 271 filecore_mountfs(devvp, mp, l, argp) 272 struct vnode *devvp; 273 struct mount *mp; 274 struct lwp *l; 275 struct filecore_args *argp; 276 { 277 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 278 struct buf *bp = NULL; 279 dev_t dev = devvp->v_rdev; 280 int error = EINVAL; 281 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 282 extern struct vnode *rootvp; 283 struct filecore_disc_record *fcdr; 284 unsigned map; 285 unsigned log2secsize; 286 287 if (!ronly) 288 return EROFS; 289 290 /* 291 * Disallow multiple mounts of the same device. 292 * Disallow mounting of a device that is currently in use 293 * (except for root, which might share swap device for miniroot). 294 * Flush out any old buffers remaining from a previous use. 295 */ 296 if ((error = vfs_mountedon(devvp)) != 0) 297 return error; 298 if (vcount(devvp) > 1 && devvp != rootvp) 299 return EBUSY; 300 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 301 != 0) 302 return (error); 303 304 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 305 if (error) 306 return error; 307 308 /* Read the filecore boot block to check FS validity and to find the map */ 309 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 310 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 311 #ifdef FILECORE_DEBUG_BR 312 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 313 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 314 bp, error); 315 #endif 316 if (error != 0) 317 goto out; 318 319 KASSERT(bp != NULL); 320 if (filecore_bbchecksum(bp->b_data) != 0) { 321 error = EINVAL; 322 goto out; 323 } 324 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 325 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 326 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 327 << fcdr->log2bpmb) >> fcdr->log2secsize; 328 log2secsize = fcdr->log2secsize; 329 bp->b_flags |= B_AGE; 330 #ifdef FILECORE_DEBUG_BR 331 printf("brelse(%p) vf1\n", bp); 332 #endif 333 brelse(bp); 334 bp = NULL; 335 336 /* Read the bootblock in the map */ 337 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 338 #ifdef FILECORE_DEBUG_BR 339 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 340 map, 1 << log2secsize, bp, error); 341 #endif 342 if (error != 0) 343 goto out; 344 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 345 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 346 memset(fcmp, 0, sizeof *fcmp); 347 if (fcdr->log2bpmb > fcdr->log2secsize) 348 fcmp->log2bsize = fcdr->log2bpmb; 349 else fcmp->log2bsize = fcdr->log2secsize; 350 fcmp->blksize = 1 << fcmp->log2bsize; 351 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 352 fcmp->map = map; 353 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 354 / (fcdr->idlen + 1); 355 fcmp->mask = (1 << fcdr->idlen) - 1; 356 if (fcdr->big_flag & 1) { 357 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 358 + fcdr->disc_size) / fcmp->blksize; 359 } else { 360 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 361 } 362 363 bp->b_flags |= B_AGE; 364 #ifdef FILECORE_DEBUG_BR 365 printf("brelse(%p) vf2\n", bp); 366 #endif 367 brelse(bp); 368 bp = NULL; 369 370 mp->mnt_data = fcmp; 371 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 372 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 373 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 374 mp->mnt_stat.f_namemax = 10; 375 mp->mnt_flag |= MNT_LOCAL; 376 mp->mnt_dev_bshift = fcdr->log2secsize; 377 mp->mnt_fs_bshift = fcmp->log2bsize; 378 379 fcmp->fc_mountp = mp; 380 fcmp->fc_dev = dev; 381 fcmp->fc_devvp = devvp; 382 fcmp->fc_mntflags = argp->flags; 383 if (argp->flags & FILECOREMNT_USEUID) { 384 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 385 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 386 } else { 387 fcmp->fc_uid = argp->uid; 388 fcmp->fc_gid = argp->gid; 389 } 390 391 return 0; 392 out: 393 if (bp) { 394 #ifdef FILECORE_DEBUG_BR 395 printf("brelse(%p) vf3\n", bp); 396 #endif 397 brelse(bp); 398 } 399 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 400 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 401 VOP_UNLOCK(devvp, 0); 402 if (fcmp) { 403 free(fcmp, M_FILECOREMNT); 404 mp->mnt_data = NULL; 405 } 406 return error; 407 } 408 409 /* 410 * Make a filesystem operational. 411 * Nothing to do at the moment. 412 */ 413 /* ARGSUSED */ 414 int 415 filecore_start(mp, flags, l) 416 struct mount *mp; 417 int flags; 418 struct lwp *l; 419 { 420 return 0; 421 } 422 423 /* 424 * unmount system call 425 */ 426 int 427 filecore_unmount(mp, mntflags, l) 428 struct mount *mp; 429 int mntflags; 430 struct lwp *l; 431 { 432 struct filecore_mnt *fcmp; 433 int error, flags = 0; 434 435 if (mntflags & MNT_FORCE) 436 flags |= FORCECLOSE; 437 #if 0 438 mntflushbuf(mp, 0); 439 if (mntinvalbuf(mp)) 440 return EBUSY; 441 #endif 442 if ((error = vflush(mp, NULLVP, flags)) != 0) 443 return (error); 444 445 fcmp = VFSTOFILECORE(mp); 446 447 if (fcmp->fc_devvp->v_type != VBAD) 448 fcmp->fc_devvp->v_specmountpoint = NULL; 449 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 450 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 451 vput(fcmp->fc_devvp); 452 free(fcmp, M_FILECOREMNT); 453 mp->mnt_data = NULL; 454 mp->mnt_flag &= ~MNT_LOCAL; 455 return (error); 456 } 457 458 /* 459 * Return root of a filesystem 460 */ 461 int 462 filecore_root(mp, vpp) 463 struct mount *mp; 464 struct vnode **vpp; 465 { 466 struct vnode *nvp; 467 int error; 468 469 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 470 return (error); 471 *vpp = nvp; 472 return (0); 473 } 474 475 /* 476 * Do operations associated with quotas, not supported 477 */ 478 /* ARGSUSED */ 479 int 480 filecore_quotactl(mp, cmd, uid, arg, l) 481 struct mount *mp; 482 int cmd; 483 uid_t uid; 484 void *arg; 485 struct lwp *l; 486 { 487 488 return (EOPNOTSUPP); 489 } 490 491 /* 492 * Get file system statistics. 493 */ 494 int 495 filecore_statvfs(mp, sbp, l) 496 struct mount *mp; 497 struct statvfs *sbp; 498 struct lwp *l; 499 { 500 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 501 502 sbp->f_bsize = fcmp->blksize; 503 sbp->f_frsize = sbp->f_bsize; /* XXX */ 504 sbp->f_iosize = sbp->f_bsize; /* XXX */ 505 sbp->f_blocks = fcmp->nblks; 506 sbp->f_bfree = 0; /* total free blocks */ 507 sbp->f_bavail = 0; /* blocks free for non superuser */ 508 sbp->f_bresvd = 0; /* reserved blocks */ 509 sbp->f_files = 0; /* total files */ 510 sbp->f_ffree = 0; /* free file nodes for non superuser */ 511 sbp->f_favail = 0; /* free file nodes */ 512 sbp->f_fresvd = 0; /* reserved file nodes */ 513 copy_statvfs_info(sbp, mp); 514 return 0; 515 } 516 517 /* ARGSUSED */ 518 int 519 filecore_sync(mp, waitfor, cred, l) 520 struct mount *mp; 521 int waitfor; 522 kauth_cred_t cred; 523 struct lwp *l; 524 { 525 return (0); 526 } 527 528 /* 529 * File handle to vnode 530 * 531 * Have to be really careful about stale file handles: 532 * - check that the inode number is in range 533 * - call iget() to get the locked inode 534 * - check for an unallocated inode (i_mode == 0) 535 * - check that the generation number matches 536 */ 537 538 struct ifid { 539 ushort ifid_len; 540 ushort ifid_pad; 541 u_int32_t ifid_ino; 542 }; 543 544 /* ARGSUSED */ 545 int 546 filecore_fhtovp(mp, fhp, vpp) 547 struct mount *mp; 548 struct fid *fhp; 549 struct vnode **vpp; 550 { 551 struct ifid ifh; 552 struct vnode *nvp; 553 struct filecore_node *ip; 554 int error; 555 556 if (fhp->fid_len != sizeof(struct ifid)) 557 return EINVAL; 558 559 memcpy(&ifh, fhp, sizeof(ifh)); 560 if ((error = VFS_VGET(mp, ifh.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 /* This looks complicated. Look at other vgets as well as the iso9660 one. 575 * 576 * The filecore inode number is made up of 1 byte directory entry index and 577 * 3 bytes of the internal disc address of the directory. On a read-only 578 * filesystem this is unique. For a read-write version we may not be able to 579 * do vget, see msdosfs. 580 */ 581 582 int 583 filecore_vget(mp, ino, vpp) 584 struct mount *mp; 585 ino_t ino; 586 struct vnode **vpp; 587 { 588 struct filecore_mnt *fcmp; 589 struct filecore_node *ip; 590 struct buf *bp; 591 struct vnode *vp; 592 dev_t dev; 593 int error; 594 595 fcmp = VFSTOFILECORE(mp); 596 dev = fcmp->fc_dev; 597 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 598 return (0); 599 600 /* Allocate a new vnode/filecore_node. */ 601 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 602 != 0) { 603 *vpp = NULLVP; 604 return (error); 605 } 606 ip = pool_get(&filecore_node_pool, PR_WAITOK); 607 memset(ip, 0, sizeof(struct filecore_node)); 608 vp->v_data = ip; 609 ip->i_vnode = vp; 610 ip->i_dev = dev; 611 ip->i_number = ino; 612 ip->i_block = -1; 613 ip->i_parent = -2; 614 615 /* 616 * Put it onto its hash chain and lock it so that other requests for 617 * this inode will block if they arrive while we are sleeping waiting 618 * for old data structures to be purged or for the contents of the 619 * disk portion of this inode to be read. 620 */ 621 filecore_ihashins(ip); 622 623 if (ino == FILECORE_ROOTINO) { 624 /* Here we need to construct a root directory inode */ 625 memcpy(ip->i_dirent.name, "root", 4); 626 ip->i_dirent.load = 0; 627 ip->i_dirent.exec = 0; 628 ip->i_dirent.len = FILECORE_DIR_SIZE; 629 ip->i_dirent.addr = fcmp->drec.root; 630 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 631 632 } else { 633 /* Read in Data from Directory Entry */ 634 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 635 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 636 vput(vp); 637 #ifdef FILECORE_DEBUG_BR 638 printf("brelse(%p) vf4\n", bp); 639 #endif 640 brelse(bp); 641 *vpp = NULL; 642 return (error); 643 } 644 645 memcpy(&ip->i_dirent, 646 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 647 sizeof(struct filecore_direntry)); 648 #ifdef FILECORE_DEBUG_BR 649 printf("brelse(%p) vf5\n", bp); 650 #endif 651 brelse(bp); 652 } 653 654 ip->i_mnt = fcmp; 655 ip->i_devvp = fcmp->fc_devvp; 656 ip->i_diroff = 0; 657 VREF(ip->i_devvp); 658 659 /* 660 * Setup type 661 */ 662 vp->v_type = VREG; 663 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 664 vp->v_type = VDIR; 665 666 /* 667 * Initialize the associated vnode 668 */ 669 switch (vp->v_type) { 670 case VFIFO: 671 case VCHR: 672 case VBLK: 673 /* 674 * Devices not supported. 675 */ 676 vput(vp); 677 return (EOPNOTSUPP); 678 case VLNK: 679 case VNON: 680 case VSOCK: 681 case VDIR: 682 case VBAD: 683 case VREG: 684 break; 685 } 686 687 if (ino == FILECORE_ROOTINO) 688 vp->v_flag |= VROOT; 689 690 /* 691 * XXX need generation number? 692 */ 693 694 genfs_node_init(vp, &filecore_genfsops); 695 vp->v_size = ip->i_size; 696 *vpp = vp; 697 return (0); 698 } 699 700 /* 701 * Vnode pointer to File handle 702 */ 703 /* ARGSUSED */ 704 int 705 filecore_vptofh(vp, fhp, fh_size) 706 struct vnode *vp; 707 struct fid *fhp; 708 size_t *fh_size; 709 { 710 struct filecore_node *ip = VTOI(vp); 711 struct ifid ifh; 712 713 if (*fh_size < sizeof(struct ifid)) { 714 *fh_size = sizeof(struct ifid); 715 return E2BIG; 716 } 717 memset(&ifh, 0, sizeof(ifh)); 718 ifh.ifid_len = sizeof(struct ifid); 719 ifh.ifid_ino = ip->i_number; 720 memcpy(fhp, &ifh, sizeof(ifh)); 721 return 0; 722 } 723 724 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 725 { 726 727 sysctl_createv(clog, 0, NULL, NULL, 728 CTLFLAG_PERMANENT, 729 CTLTYPE_NODE, "vfs", NULL, 730 NULL, 0, NULL, 0, 731 CTL_VFS, CTL_EOL); 732 sysctl_createv(clog, 0, NULL, NULL, 733 CTLFLAG_PERMANENT, 734 CTLTYPE_NODE, "filecore", 735 SYSCTL_DESCR("Acorn FILECORE file system"), 736 NULL, 0, NULL, 0, 737 CTL_VFS, 19, CTL_EOL); 738 /* 739 * XXX the "19" above could be dynamic, thereby eliminating 740 * one more instance of the "number to vfs" mapping problem, 741 * but "19" is the order as taken from sys/mount.h 742 */ 743 } 744
Indexes created Wed Oct 01 12:09:54 GMT 2025