filecore_vfsops.c revision 1.35
1 /* $NetBSD: filecore_vfsops.c,v 1.35 2007/07/09 00:01:42 pooka 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 1.35 2007/07/09 00:01:42 pooka 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"); 99 100 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 101 102 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 103 &filecore_vnodeop_opv_desc, 104 NULL, 105 }; 106 107 struct vfsops filecore_vfsops = { 108 MOUNT_FILECORE, 109 filecore_mount, 110 filecore_start, 111 filecore_unmount, 112 filecore_root, 113 filecore_quotactl, 114 filecore_statvfs, 115 filecore_sync, 116 filecore_vget, 117 filecore_fhtovp, 118 filecore_vptofh, 119 filecore_init, 120 filecore_reinit, 121 filecore_done, 122 NULL, /* filecore_mountroot */ 123 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 124 vfs_stdextattrctl, 125 vfs_stdsuspendctl, 126 filecore_vnodeopv_descs, 127 0, 128 { NULL, NULL } 129 }; 130 VFS_ATTACH(filecore_vfsops); 131 132 static const struct genfs_ops filecore_genfsops = { 133 .gop_size = genfs_size, 134 }; 135 136 /* 137 * Called by vfs_mountroot when iso is going to be mounted as root. 138 * 139 * Name is updated by mount(8) after booting. 140 */ 141 142 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 143 struct lwp *l, struct filecore_args *argp)); 144 145 #if 0 146 int 147 filecore_mountroot() 148 { 149 struct mount *mp; 150 extern struct vnode *rootvp; 151 struct proc *p = curproc; /* XXX */ 152 int error; 153 struct filecore_args args; 154 155 if (device_class(root_device) != DV_DISK) 156 return (ENODEV); 157 158 /* 159 * Get vnodes for swapdev and rootdev. 160 */ 161 if (bdevvp(rootdev, &rootvp)) 162 panic("filecore_mountroot: can't setup rootvp"); 163 164 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 165 return (error); 166 167 args.flags = FILECOREMNT_ROOT; 168 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 169 mp->mnt_op->vfs_refcount--; 170 vfs_unbusy(mp); 171 free(mp, M_MOUNT); 172 return (error); 173 } 174 simple_lock(&mountlist_slock); 175 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 176 simple_unlock(&mountlist_slock); 177 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 178 vfs_unbusy(mp); 179 return (0); 180 } 181 #endif 182 183 /* 184 * VFS Operations. 185 * 186 * mount system call 187 */ 188 int 189 filecore_mount(mp, path, data, ndp, l) 190 struct mount *mp; 191 const char *path; 192 void *data; 193 struct nameidata *ndp; 194 struct lwp *l; 195 { 196 struct vnode *devvp; 197 struct filecore_args args; 198 int error; 199 struct filecore_mnt *fcmp = NULL; 200 201 if (mp->mnt_flag & MNT_GETARGS) { 202 fcmp = VFSTOFILECORE(mp); 203 if (fcmp == NULL) 204 return EIO; 205 args.flags = fcmp->fc_mntflags; 206 args.uid = fcmp->fc_uid; 207 args.gid = fcmp->fc_gid; 208 args.fspec = NULL; 209 return copyout(&args, data, sizeof(args)); 210 } 211 error = copyin(data, &args, sizeof (struct filecore_args)); 212 if (error) 213 return (error); 214 215 if ((mp->mnt_flag & MNT_RDONLY) == 0) 216 return (EROFS); 217 218 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 219 return EINVAL; 220 221 /* 222 * Not an update, or updating the name: look up the name 223 * and verify that it refers to a sensible block device. 224 */ 225 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 226 if ((error = namei(ndp)) != 0) 227 return (error); 228 devvp = ndp->ni_vp; 229 230 if (devvp->v_type != VBLK) { 231 vrele(devvp); 232 return ENOTBLK; 233 } 234 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 235 vrele(devvp); 236 return ENXIO; 237 } 238 /* 239 * If mount by non-root, then verify that user has necessary 240 * permissions on the device. 241 */ 242 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 243 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 244 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 245 VOP_UNLOCK(devvp, 0); 246 if (error) { 247 vrele(devvp); 248 return (error); 249 } 250 } 251 if ((mp->mnt_flag & MNT_UPDATE) == 0) 252 error = filecore_mountfs(devvp, mp, l, &args); 253 else { 254 if (devvp != fcmp->fc_devvp) 255 error = EINVAL; /* needs translation */ 256 else 257 vrele(devvp); 258 } 259 if (error) { 260 vrele(devvp); 261 return error; 262 } 263 fcmp = VFSTOFILECORE(mp); 264 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 265 mp, l); 266 } 267 268 /* 269 * Common code for mount and mountroot 270 */ 271 static int 272 filecore_mountfs(devvp, mp, l, argp) 273 struct vnode *devvp; 274 struct mount *mp; 275 struct lwp *l; 276 struct filecore_args *argp; 277 { 278 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 279 struct buf *bp = NULL; 280 dev_t dev = devvp->v_rdev; 281 int error = EINVAL; 282 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 283 extern struct vnode *rootvp; 284 struct filecore_disc_record *fcdr; 285 unsigned map; 286 unsigned log2secsize; 287 288 if (!ronly) 289 return EROFS; 290 291 /* 292 * Disallow multiple mounts of the same device. 293 * Disallow mounting of a device that is currently in use 294 * (except for root, which might share swap device for miniroot). 295 * Flush out any old buffers remaining from a previous use. 296 */ 297 if ((error = vfs_mountedon(devvp)) != 0) 298 return error; 299 if (vcount(devvp) > 1 && devvp != rootvp) 300 return EBUSY; 301 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 302 != 0) 303 return (error); 304 305 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 306 if (error) 307 return error; 308 309 /* Read the filecore boot block to check FS validity and to find the map */ 310 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 311 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 312 #ifdef FILECORE_DEBUG_BR 313 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 314 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 315 bp, error); 316 #endif 317 if (error != 0) 318 goto out; 319 320 KASSERT(bp != NULL); 321 if (filecore_bbchecksum(bp->b_data) != 0) { 322 error = EINVAL; 323 goto out; 324 } 325 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 326 FILECORE_BB_DISCREC); 327 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 328 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 329 << fcdr->log2bpmb) >> fcdr->log2secsize; 330 log2secsize = fcdr->log2secsize; 331 bp->b_flags |= B_AGE; 332 #ifdef FILECORE_DEBUG_BR 333 printf("brelse(%p) vf1\n", bp); 334 #endif 335 brelse(bp); 336 bp = NULL; 337 338 /* Read the bootblock in the map */ 339 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 340 #ifdef FILECORE_DEBUG_BR 341 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 342 map, 1 << log2secsize, bp, error); 343 #endif 344 if (error != 0) 345 goto out; 346 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 347 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 348 memset(fcmp, 0, sizeof *fcmp); 349 if (fcdr->log2bpmb > fcdr->log2secsize) 350 fcmp->log2bsize = fcdr->log2bpmb; 351 else fcmp->log2bsize = fcdr->log2secsize; 352 fcmp->blksize = 1 << fcmp->log2bsize; 353 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 354 fcmp->map = map; 355 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 356 / (fcdr->idlen + 1); 357 fcmp->mask = (1 << fcdr->idlen) - 1; 358 if (fcdr->big_flag & 1) { 359 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 360 + fcdr->disc_size) / fcmp->blksize; 361 } else { 362 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 363 } 364 365 bp->b_flags |= B_AGE; 366 #ifdef FILECORE_DEBUG_BR 367 printf("brelse(%p) vf2\n", bp); 368 #endif 369 brelse(bp); 370 bp = NULL; 371 372 mp->mnt_data = fcmp; 373 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 374 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 375 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 376 mp->mnt_stat.f_namemax = 10; 377 mp->mnt_flag |= MNT_LOCAL; 378 mp->mnt_dev_bshift = fcdr->log2secsize; 379 mp->mnt_fs_bshift = fcmp->log2bsize; 380 381 fcmp->fc_mountp = mp; 382 fcmp->fc_dev = dev; 383 fcmp->fc_devvp = devvp; 384 fcmp->fc_mntflags = argp->flags; 385 if (argp->flags & FILECOREMNT_USEUID) { 386 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 387 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 388 } else { 389 fcmp->fc_uid = argp->uid; 390 fcmp->fc_gid = argp->gid; 391 } 392 393 return 0; 394 out: 395 if (bp) { 396 #ifdef FILECORE_DEBUG_BR 397 printf("brelse(%p) vf3\n", bp); 398 #endif 399 brelse(bp); 400 } 401 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 402 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 403 VOP_UNLOCK(devvp, 0); 404 return error; 405 } 406 407 /* 408 * Make a filesystem operational. 409 * Nothing to do at the moment. 410 */ 411 /* ARGSUSED */ 412 int 413 filecore_start(mp, flags, l) 414 struct mount *mp; 415 int flags; 416 struct lwp *l; 417 { 418 return 0; 419 } 420 421 /* 422 * unmount system call 423 */ 424 int 425 filecore_unmount(mp, mntflags, l) 426 struct mount *mp; 427 int mntflags; 428 struct lwp *l; 429 { 430 struct filecore_mnt *fcmp; 431 int error, flags = 0; 432 433 if (mntflags & MNT_FORCE) 434 flags |= FORCECLOSE; 435 if ((error = vflush(mp, NULLVP, flags)) != 0) 436 return (error); 437 438 fcmp = VFSTOFILECORE(mp); 439 440 if (fcmp->fc_devvp->v_type != VBAD) 441 fcmp->fc_devvp->v_specmountpoint = NULL; 442 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 443 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 444 vput(fcmp->fc_devvp); 445 free(fcmp, M_FILECOREMNT); 446 mp->mnt_data = NULL; 447 mp->mnt_flag &= ~MNT_LOCAL; 448 return (error); 449 } 450 451 /* 452 * Return root of a filesystem 453 */ 454 int 455 filecore_root(mp, vpp) 456 struct mount *mp; 457 struct vnode **vpp; 458 { 459 struct vnode *nvp; 460 int error; 461 462 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 463 return (error); 464 *vpp = nvp; 465 return (0); 466 } 467 468 /* 469 * Do operations associated with quotas, not supported 470 */ 471 /* ARGSUSED */ 472 int 473 filecore_quotactl(mp, cmd, uid, arg, l) 474 struct mount *mp; 475 int cmd; 476 uid_t uid; 477 void *arg; 478 struct lwp *l; 479 { 480 481 return (EOPNOTSUPP); 482 } 483 484 /* 485 * Get file system statistics. 486 */ 487 int 488 filecore_statvfs(mp, sbp, l) 489 struct mount *mp; 490 struct statvfs *sbp; 491 struct lwp *l; 492 { 493 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 494 495 sbp->f_bsize = fcmp->blksize; 496 sbp->f_frsize = sbp->f_bsize; /* XXX */ 497 sbp->f_iosize = sbp->f_bsize; /* XXX */ 498 sbp->f_blocks = fcmp->nblks; 499 sbp->f_bfree = 0; /* total free blocks */ 500 sbp->f_bavail = 0; /* blocks free for non superuser */ 501 sbp->f_bresvd = 0; /* reserved blocks */ 502 sbp->f_files = 0; /* total files */ 503 sbp->f_ffree = 0; /* free file nodes for non superuser */ 504 sbp->f_favail = 0; /* free file nodes */ 505 sbp->f_fresvd = 0; /* reserved file nodes */ 506 copy_statvfs_info(sbp, mp); 507 return 0; 508 } 509 510 /* ARGSUSED */ 511 int 512 filecore_sync(mp, waitfor, cred, l) 513 struct mount *mp; 514 int waitfor; 515 kauth_cred_t cred; 516 struct lwp *l; 517 { 518 return (0); 519 } 520 521 /* 522 * File handle to vnode 523 * 524 * Have to be really careful about stale file handles: 525 * - check that the inode number is in range 526 * - call iget() to get the locked inode 527 * - check for an unallocated inode (i_mode == 0) 528 * - check that the generation number matches 529 */ 530 531 struct ifid { 532 ushort ifid_len; 533 ushort ifid_pad; 534 u_int32_t ifid_ino; 535 }; 536 537 /* ARGSUSED */ 538 int 539 filecore_fhtovp(mp, fhp, vpp) 540 struct mount *mp; 541 struct fid *fhp; 542 struct vnode **vpp; 543 { 544 struct ifid ifh; 545 struct vnode *nvp; 546 struct filecore_node *ip; 547 int error; 548 549 if (fhp->fid_len != sizeof(struct ifid)) 550 return EINVAL; 551 552 memcpy(&ifh, fhp, sizeof(ifh)); 553 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 554 *vpp = NULLVP; 555 return (error); 556 } 557 ip = VTOI(nvp); 558 if (filecore_staleinode(ip)) { 559 vput(nvp); 560 *vpp = NULLVP; 561 return (ESTALE); 562 } 563 *vpp = nvp; 564 return (0); 565 } 566 567 /* This looks complicated. Look at other vgets as well as the iso9660 one. 568 * 569 * The filecore inode number is made up of 1 byte directory entry index and 570 * 3 bytes of the internal disc address of the directory. On a read-only 571 * filesystem this is unique. For a read-write version we may not be able to 572 * do vget, see msdosfs. 573 */ 574 575 int 576 filecore_vget(mp, ino, vpp) 577 struct mount *mp; 578 ino_t ino; 579 struct vnode **vpp; 580 { 581 struct filecore_mnt *fcmp; 582 struct filecore_node *ip; 583 struct buf *bp; 584 struct vnode *vp; 585 dev_t dev; 586 int error; 587 588 fcmp = VFSTOFILECORE(mp); 589 dev = fcmp->fc_dev; 590 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 591 return (0); 592 593 /* Allocate a new vnode/filecore_node. */ 594 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 595 != 0) { 596 *vpp = NULLVP; 597 return (error); 598 } 599 ip = pool_get(&filecore_node_pool, PR_WAITOK); 600 memset(ip, 0, sizeof(struct filecore_node)); 601 vp->v_data = ip; 602 ip->i_vnode = vp; 603 ip->i_dev = dev; 604 ip->i_number = ino; 605 ip->i_block = -1; 606 ip->i_parent = -2; 607 608 /* 609 * Put it onto its hash chain and lock it so that other requests for 610 * this inode will block if they arrive while we are sleeping waiting 611 * for old data structures to be purged or for the contents of the 612 * disk portion of this inode to be read. 613 */ 614 filecore_ihashins(ip); 615 616 if (ino == FILECORE_ROOTINO) { 617 /* Here we need to construct a root directory inode */ 618 memcpy(ip->i_dirent.name, "root", 4); 619 ip->i_dirent.load = 0; 620 ip->i_dirent.exec = 0; 621 ip->i_dirent.len = FILECORE_DIR_SIZE; 622 ip->i_dirent.addr = fcmp->drec.root; 623 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 624 625 } else { 626 /* Read in Data from Directory Entry */ 627 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 628 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 629 vput(vp); 630 #ifdef FILECORE_DEBUG_BR 631 printf("brelse(%p) vf4\n", bp); 632 #endif 633 brelse(bp); 634 *vpp = NULL; 635 return (error); 636 } 637 638 memcpy(&ip->i_dirent, 639 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 640 sizeof(struct filecore_direntry)); 641 #ifdef FILECORE_DEBUG_BR 642 printf("brelse(%p) vf5\n", bp); 643 #endif 644 brelse(bp); 645 } 646 647 ip->i_mnt = fcmp; 648 ip->i_devvp = fcmp->fc_devvp; 649 ip->i_diroff = 0; 650 VREF(ip->i_devvp); 651 652 /* 653 * Setup type 654 */ 655 vp->v_type = VREG; 656 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 657 vp->v_type = VDIR; 658 659 /* 660 * Initialize the associated vnode 661 */ 662 switch (vp->v_type) { 663 case VFIFO: 664 case VCHR: 665 case VBLK: 666 /* 667 * Devices not supported. 668 */ 669 vput(vp); 670 return (EOPNOTSUPP); 671 case VLNK: 672 case VNON: 673 case VSOCK: 674 case VDIR: 675 case VBAD: 676 case VREG: 677 break; 678 } 679 680 if (ino == FILECORE_ROOTINO) 681 vp->v_flag |= VROOT; 682 683 /* 684 * XXX need generation number? 685 */ 686 687 genfs_node_init(vp, &filecore_genfsops); 688 vp->v_size = ip->i_size; 689 *vpp = vp; 690 return (0); 691 } 692 693 /* 694 * Vnode pointer to File handle 695 */ 696 /* ARGSUSED */ 697 int 698 filecore_vptofh(vp, fhp, fh_size) 699 struct vnode *vp; 700 struct fid *fhp; 701 size_t *fh_size; 702 { 703 struct filecore_node *ip = VTOI(vp); 704 struct ifid ifh; 705 706 if (*fh_size < sizeof(struct ifid)) { 707 *fh_size = sizeof(struct ifid); 708 return E2BIG; 709 } 710 memset(&ifh, 0, sizeof(ifh)); 711 ifh.ifid_len = sizeof(struct ifid); 712 ifh.ifid_ino = ip->i_number; 713 memcpy(fhp, &ifh, sizeof(ifh)); 714 return 0; 715 } 716 717 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 718 { 719 720 sysctl_createv(clog, 0, NULL, NULL, 721 CTLFLAG_PERMANENT, 722 CTLTYPE_NODE, "vfs", NULL, 723 NULL, 0, NULL, 0, 724 CTL_VFS, CTL_EOL); 725 sysctl_createv(clog, 0, NULL, NULL, 726 CTLFLAG_PERMANENT, 727 CTLTYPE_NODE, "filecore", 728 SYSCTL_DESCR("Acorn FILECORE file system"), 729 NULL, 0, NULL, 0, 730 CTL_VFS, 19, CTL_EOL); 731 /* 732 * XXX the "19" above could be dynamic, thereby eliminating 733 * one more instance of the "number to vfs" mapping problem, 734 * but "19" is the order as taken from sys/mount.h 735 */ 736 } 737
Indexes created Wed Oct 01 12:09:54 GMT 2025