filecore_vfsops.c revision 1.27.6.2
1 /* $NetBSD: filecore_vfsops.c,v 1.27.6.2 2006/12/10 07:18:37 yamt 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 1.27.6.2 2006/12/10 07:18:37 yamt 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 filecore_vnodeopv_descs, 125 0, 126 { NULL, NULL } 127 }; 128 VFS_ATTACH(filecore_vfsops); 129 130 static const struct genfs_ops filecore_genfsops = { 131 .gop_size = genfs_size, 132 }; 133 134 /* 135 * Called by vfs_mountroot when iso is going to be mounted as root. 136 * 137 * Name is updated by mount(8) after booting. 138 */ 139 140 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 141 struct lwp *l, struct filecore_args *argp)); 142 143 #if 0 144 int 145 filecore_mountroot() 146 { 147 struct mount *mp; 148 extern struct vnode *rootvp; 149 struct proc *p = curproc; /* XXX */ 150 int error; 151 struct filecore_args args; 152 153 if (device_class(root_device) != DV_DISK) 154 return (ENODEV); 155 156 /* 157 * Get vnodes for swapdev and rootdev. 158 */ 159 if (bdevvp(rootdev, &rootvp)) 160 panic("filecore_mountroot: can't setup rootvp"); 161 162 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 163 return (error); 164 165 args.flags = FILECOREMNT_ROOT; 166 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 167 mp->mnt_op->vfs_refcount--; 168 vfs_unbusy(mp); 169 free(mp, M_MOUNT); 170 return (error); 171 } 172 simple_lock(&mountlist_slock); 173 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 174 simple_unlock(&mountlist_slock); 175 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 176 vfs_unbusy(mp); 177 return (0); 178 } 179 #endif 180 181 /* 182 * VFS Operations. 183 * 184 * mount system call 185 */ 186 int 187 filecore_mount(mp, path, data, ndp, l) 188 struct mount *mp; 189 const char *path; 190 void *data; 191 struct nameidata *ndp; 192 struct lwp *l; 193 { 194 struct vnode *devvp; 195 struct filecore_args args; 196 int error; 197 struct filecore_mnt *fcmp = NULL; 198 199 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 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 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 217 return EINVAL; 218 219 /* 220 * Not an update, or updating the name: look up the name 221 * and verify that it refers to a sensible block device. 222 */ 223 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 224 if ((error = namei(ndp)) != 0) 225 return (error); 226 devvp = ndp->ni_vp; 227 228 if (devvp->v_type != VBLK) { 229 vrele(devvp); 230 return ENOTBLK; 231 } 232 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 233 vrele(devvp); 234 return ENXIO; 235 } 236 /* 237 * If mount by non-root, then verify that user has necessary 238 * permissions on the device. 239 */ 240 if (kauth_cred_geteuid(l->l_cred) != 0) { 241 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 242 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 243 VOP_UNLOCK(devvp, 0); 244 if (error) { 245 vrele(devvp); 246 return (error); 247 } 248 } 249 if ((mp->mnt_flag & MNT_UPDATE) == 0) 250 error = filecore_mountfs(devvp, mp, l, &args); 251 else { 252 if (devvp != fcmp->fc_devvp) 253 error = EINVAL; /* needs translation */ 254 else 255 vrele(devvp); 256 } 257 if (error) { 258 vrele(devvp); 259 return error; 260 } 261 fcmp = VFSTOFILECORE(mp); 262 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 263 mp, l); 264 } 265 266 /* 267 * Common code for mount and mountroot 268 */ 269 static int 270 filecore_mountfs(devvp, mp, l, argp) 271 struct vnode *devvp; 272 struct mount *mp; 273 struct lwp *l; 274 struct filecore_args *argp; 275 { 276 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 277 struct buf *bp = NULL; 278 dev_t dev = devvp->v_rdev; 279 int error = EINVAL; 280 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 281 extern struct vnode *rootvp; 282 struct filecore_disc_record *fcdr; 283 unsigned map; 284 unsigned log2secsize; 285 286 if (!ronly) 287 return EROFS; 288 289 /* 290 * Disallow multiple mounts of the same device. 291 * Disallow mounting of a device that is currently in use 292 * (except for root, which might share swap device for miniroot). 293 * Flush out any old buffers remaining from a previous use. 294 */ 295 if ((error = vfs_mountedon(devvp)) != 0) 296 return error; 297 if (vcount(devvp) > 1 && devvp != rootvp) 298 return EBUSY; 299 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 300 != 0) 301 return (error); 302 303 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 304 if (error) 305 return error; 306 307 /* Read the filecore boot block to check FS validity and to find the map */ 308 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 309 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 310 #ifdef FILECORE_DEBUG_BR 311 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 312 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 313 bp, error); 314 #endif 315 if (error != 0) 316 goto out; 317 318 KASSERT(bp != NULL); 319 if (filecore_bbchecksum(bp->b_data) != 0) { 320 error = EINVAL; 321 goto out; 322 } 323 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 324 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 325 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 326 << fcdr->log2bpmb) >> fcdr->log2secsize; 327 log2secsize = fcdr->log2secsize; 328 bp->b_flags |= B_AGE; 329 #ifdef FILECORE_DEBUG_BR 330 printf("brelse(%p) vf1\n", bp); 331 #endif 332 brelse(bp); 333 bp = NULL; 334 335 /* Read the bootblock in the map */ 336 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 337 #ifdef FILECORE_DEBUG_BR 338 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 339 map, 1 << log2secsize, bp, error); 340 #endif 341 if (error != 0) 342 goto out; 343 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 344 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 345 memset(fcmp, 0, sizeof *fcmp); 346 if (fcdr->log2bpmb > fcdr->log2secsize) 347 fcmp->log2bsize = fcdr->log2bpmb; 348 else fcmp->log2bsize = fcdr->log2secsize; 349 fcmp->blksize = 1 << fcmp->log2bsize; 350 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 351 fcmp->map = map; 352 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 353 / (fcdr->idlen + 1); 354 fcmp->mask = (1 << fcdr->idlen) - 1; 355 if (fcdr->big_flag & 1) { 356 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 357 + fcdr->disc_size) / fcmp->blksize; 358 } else { 359 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 360 } 361 362 bp->b_flags |= B_AGE; 363 #ifdef FILECORE_DEBUG_BR 364 printf("brelse(%p) vf2\n", bp); 365 #endif 366 brelse(bp); 367 bp = NULL; 368 369 mp->mnt_data = fcmp; 370 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 371 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 372 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 373 mp->mnt_stat.f_namemax = 10; 374 mp->mnt_flag |= MNT_LOCAL; 375 mp->mnt_dev_bshift = fcdr->log2secsize; 376 mp->mnt_fs_bshift = fcmp->log2bsize; 377 378 fcmp->fc_mountp = mp; 379 fcmp->fc_dev = dev; 380 fcmp->fc_devvp = devvp; 381 fcmp->fc_mntflags = argp->flags; 382 if (argp->flags & FILECOREMNT_USEUID) { 383 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 384 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 385 } else { 386 fcmp->fc_uid = argp->uid; 387 fcmp->fc_gid = argp->gid; 388 } 389 390 return 0; 391 out: 392 if (bp) { 393 #ifdef FILECORE_DEBUG_BR 394 printf("brelse(%p) vf3\n", bp); 395 #endif 396 brelse(bp); 397 } 398 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 399 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 400 VOP_UNLOCK(devvp, 0); 401 if (fcmp) { 402 free(fcmp, M_FILECOREMNT); 403 mp->mnt_data = NULL; 404 } 405 return error; 406 } 407 408 /* 409 * Make a filesystem operational. 410 * Nothing to do at the moment. 411 */ 412 /* ARGSUSED */ 413 int 414 filecore_start(mp, flags, l) 415 struct mount *mp; 416 int flags; 417 struct lwp *l; 418 { 419 return 0; 420 } 421 422 /* 423 * unmount system call 424 */ 425 int 426 filecore_unmount(mp, mntflags, l) 427 struct mount *mp; 428 int mntflags; 429 struct lwp *l; 430 { 431 struct filecore_mnt *fcmp; 432 int error, flags = 0; 433 434 if (mntflags & MNT_FORCE) 435 flags |= FORCECLOSE; 436 #if 0 437 mntflushbuf(mp, 0); 438 if (mntinvalbuf(mp)) 439 return EBUSY; 440 #endif 441 if ((error = vflush(mp, NULLVP, flags)) != 0) 442 return (error); 443 444 fcmp = VFSTOFILECORE(mp); 445 446 if (fcmp->fc_devvp->v_type != VBAD) 447 fcmp->fc_devvp->v_specmountpoint = NULL; 448 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 449 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 450 vput(fcmp->fc_devvp); 451 free(fcmp, M_FILECOREMNT); 452 mp->mnt_data = NULL; 453 mp->mnt_flag &= ~MNT_LOCAL; 454 return (error); 455 } 456 457 /* 458 * Return root of a filesystem 459 */ 460 int 461 filecore_root(mp, vpp) 462 struct mount *mp; 463 struct vnode **vpp; 464 { 465 struct vnode *nvp; 466 int error; 467 468 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 469 return (error); 470 *vpp = nvp; 471 return (0); 472 } 473 474 /* 475 * Do operations associated with quotas, not supported 476 */ 477 /* ARGSUSED */ 478 int 479 filecore_quotactl(mp, cmd, uid, arg, l) 480 struct mount *mp; 481 int cmd; 482 uid_t uid; 483 void *arg; 484 struct lwp *l; 485 { 486 487 return (EOPNOTSUPP); 488 } 489 490 /* 491 * Get file system statistics. 492 */ 493 int 494 filecore_statvfs(mp, sbp, l) 495 struct mount *mp; 496 struct statvfs *sbp; 497 struct lwp *l; 498 { 499 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 500 501 sbp->f_bsize = fcmp->blksize; 502 sbp->f_frsize = sbp->f_bsize; /* XXX */ 503 sbp->f_iosize = sbp->f_bsize; /* XXX */ 504 sbp->f_blocks = fcmp->nblks; 505 sbp->f_bfree = 0; /* total free blocks */ 506 sbp->f_bavail = 0; /* blocks free for non superuser */ 507 sbp->f_bresvd = 0; /* reserved blocks */ 508 sbp->f_files = 0; /* total files */ 509 sbp->f_ffree = 0; /* free file nodes for non superuser */ 510 sbp->f_favail = 0; /* free file nodes */ 511 sbp->f_fresvd = 0; /* reserved file nodes */ 512 copy_statvfs_info(sbp, mp); 513 return 0; 514 } 515 516 /* ARGSUSED */ 517 int 518 filecore_sync(mp, waitfor, cred, l) 519 struct mount *mp; 520 int waitfor; 521 kauth_cred_t cred; 522 struct lwp *l; 523 { 524 return (0); 525 } 526 527 /* 528 * File handle to vnode 529 * 530 * Have to be really careful about stale file handles: 531 * - check that the inode number is in range 532 * - call iget() to get the locked inode 533 * - check for an unallocated inode (i_mode == 0) 534 * - check that the generation number matches 535 */ 536 537 struct ifid { 538 ushort ifid_len; 539 ushort ifid_pad; 540 u_int32_t ifid_ino; 541 }; 542 543 /* ARGSUSED */ 544 int 545 filecore_fhtovp(mp, fhp, vpp) 546 struct mount *mp; 547 struct fid *fhp; 548 struct vnode **vpp; 549 { 550 struct ifid ifh; 551 struct vnode *nvp; 552 struct filecore_node *ip; 553 int error; 554 555 if (fhp->fid_len != sizeof(struct ifid)) 556 return EINVAL; 557 558 memcpy(&ifh, fhp, sizeof(ifh)); 559 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 560 *vpp = NULLVP; 561 return (error); 562 } 563 ip = VTOI(nvp); 564 if (filecore_staleinode(ip)) { 565 vput(nvp); 566 *vpp = NULLVP; 567 return (ESTALE); 568 } 569 *vpp = nvp; 570 return (0); 571 } 572 573 /* This looks complicated. Look at other vgets as well as the iso9660 one. 574 * 575 * The filecore inode number is made up of 1 byte directory entry index and 576 * 3 bytes of the internal disc address of the directory. On a read-only 577 * filesystem this is unique. For a read-write version we may not be able to 578 * do vget, see msdosfs. 579 */ 580 581 int 582 filecore_vget(mp, ino, vpp) 583 struct mount *mp; 584 ino_t ino; 585 struct vnode **vpp; 586 { 587 struct filecore_mnt *fcmp; 588 struct filecore_node *ip; 589 struct buf *bp; 590 struct vnode *vp; 591 dev_t dev; 592 int error; 593 594 fcmp = VFSTOFILECORE(mp); 595 dev = fcmp->fc_dev; 596 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 597 return (0); 598 599 /* Allocate a new vnode/filecore_node. */ 600 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 601 != 0) { 602 *vpp = NULLVP; 603 return (error); 604 } 605 ip = pool_get(&filecore_node_pool, PR_WAITOK); 606 memset(ip, 0, sizeof(struct filecore_node)); 607 vp->v_data = ip; 608 ip->i_vnode = vp; 609 ip->i_dev = dev; 610 ip->i_number = ino; 611 ip->i_block = -1; 612 ip->i_parent = -2; 613 614 /* 615 * Put it onto its hash chain and lock it so that other requests for 616 * this inode will block if they arrive while we are sleeping waiting 617 * for old data structures to be purged or for the contents of the 618 * disk portion of this inode to be read. 619 */ 620 filecore_ihashins(ip); 621 622 if (ino == FILECORE_ROOTINO) { 623 /* Here we need to construct a root directory inode */ 624 memcpy(ip->i_dirent.name, "root", 4); 625 ip->i_dirent.load = 0; 626 ip->i_dirent.exec = 0; 627 ip->i_dirent.len = FILECORE_DIR_SIZE; 628 ip->i_dirent.addr = fcmp->drec.root; 629 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 630 631 } else { 632 /* Read in Data from Directory Entry */ 633 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 634 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 635 vput(vp); 636 #ifdef FILECORE_DEBUG_BR 637 printf("brelse(%p) vf4\n", bp); 638 #endif 639 brelse(bp); 640 *vpp = NULL; 641 return (error); 642 } 643 644 memcpy(&ip->i_dirent, 645 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 646 sizeof(struct filecore_direntry)); 647 #ifdef FILECORE_DEBUG_BR 648 printf("brelse(%p) vf5\n", bp); 649 #endif 650 brelse(bp); 651 } 652 653 ip->i_mnt = fcmp; 654 ip->i_devvp = fcmp->fc_devvp; 655 ip->i_diroff = 0; 656 VREF(ip->i_devvp); 657 658 /* 659 * Setup type 660 */ 661 vp->v_type = VREG; 662 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 663 vp->v_type = VDIR; 664 665 /* 666 * Initialize the associated vnode 667 */ 668 switch (vp->v_type) { 669 case VFIFO: 670 case VCHR: 671 case VBLK: 672 /* 673 * Devices not supported. 674 */ 675 vput(vp); 676 return (EOPNOTSUPP); 677 case VLNK: 678 case VNON: 679 case VSOCK: 680 case VDIR: 681 case VBAD: 682 case VREG: 683 break; 684 } 685 686 if (ino == FILECORE_ROOTINO) 687 vp->v_flag |= VROOT; 688 689 /* 690 * XXX need generation number? 691 */ 692 693 genfs_node_init(vp, &filecore_genfsops); 694 vp->v_size = ip->i_size; 695 *vpp = vp; 696 return (0); 697 } 698 699 /* 700 * Vnode pointer to File handle 701 */ 702 /* ARGSUSED */ 703 int 704 filecore_vptofh(vp, fhp, fh_size) 705 struct vnode *vp; 706 struct fid *fhp; 707 size_t *fh_size; 708 { 709 struct filecore_node *ip = VTOI(vp); 710 struct ifid ifh; 711 712 if (*fh_size < sizeof(struct ifid)) { 713 *fh_size = sizeof(struct ifid); 714 return E2BIG; 715 } 716 memset(&ifh, 0, sizeof(ifh)); 717 ifh.ifid_len = sizeof(struct ifid); 718 ifh.ifid_ino = ip->i_number; 719 memcpy(fhp, &ifh, sizeof(ifh)); 720 return 0; 721 } 722 723 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 724 { 725 726 sysctl_createv(clog, 0, NULL, NULL, 727 CTLFLAG_PERMANENT, 728 CTLTYPE_NODE, "vfs", NULL, 729 NULL, 0, NULL, 0, 730 CTL_VFS, CTL_EOL); 731 sysctl_createv(clog, 0, NULL, NULL, 732 CTLFLAG_PERMANENT, 733 CTLTYPE_NODE, "filecore", 734 SYSCTL_DESCR("Acorn FILECORE file system"), 735 NULL, 0, NULL, 0, 736 CTL_VFS, 19, CTL_EOL); 737 /* 738 * XXX the "19" above could be dynamic, thereby eliminating 739 * one more instance of the "number to vfs" mapping problem, 740 * but "19" is the order as taken from sys/mount.h 741 */ 742 } 743
Indexes created Wed Oct 01 12:09:54 GMT 2025