filecore_vfsops.c revision 1.54
1 /* $NetBSD: filecore_vfsops.c,v 1.54 2008/05/16 09:21:59 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 1.54 2008/05/16 09:21:59 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/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 #include <sys/module.h> 93 94 #include <fs/filecorefs/filecore.h> 95 #include <fs/filecorefs/filecore_extern.h> 96 #include <fs/filecorefs/filecore_node.h> 97 #include <fs/filecorefs/filecore_mount.h> 98 99 MODULE(MODULE_CLASS_VFS, filecorefs, NULL); 100 101 MALLOC_JUSTDEFINE(M_FILECOREMNT, 102 "filecore mount", "Filecore FS mount structures"); 103 MALLOC_JUSTDEFINE(M_FILECORETMP, 104 "filecore temp", "Filecore FS temporary structures"); 105 106 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 107 108 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 109 &filecore_vnodeop_opv_desc, 110 NULL, 111 }; 112 113 struct vfsops filecore_vfsops = { 114 MOUNT_FILECORE, 115 sizeof (struct filecore_args), 116 filecore_mount, 117 filecore_start, 118 filecore_unmount, 119 filecore_root, 120 (void *)eopnotsupp, /* vfs_quotactl */ 121 filecore_statvfs, 122 filecore_sync, 123 filecore_vget, 124 filecore_fhtovp, 125 filecore_vptofh, 126 filecore_init, 127 filecore_reinit, 128 filecore_done, 129 NULL, /* filecore_mountroot */ 130 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 131 vfs_stdextattrctl, 132 (void *)eopnotsupp, /* vfs_suspendctl */ 133 genfs_renamelock_enter, 134 genfs_renamelock_exit, 135 (void *)eopnotsupp, 136 filecore_vnodeopv_descs, 137 0, 138 { NULL, NULL } 139 }; 140 141 static const struct genfs_ops filecore_genfsops = { 142 .gop_size = genfs_size, 143 }; 144 145 static int 146 filecorefs_modcmd(modcmd_t cmd, void *arg) 147 { 148 149 switch (cmd) { 150 case MODULE_CMD_INIT: 151 return vfs_attach(&filecore_vfsops); 152 case MODULE_CMD_FINI: 153 return vfs_detach(&filecore_vfsops); 154 default: 155 return ENOTTY; 156 } 157 } 158 159 /* 160 * Called by vfs_mountroot when iso is going to be mounted as root. 161 * 162 * Name is updated by mount(8) after booting. 163 */ 164 165 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 166 struct lwp *l, struct filecore_args *argp)); 167 168 #if 0 169 int 170 filecore_mountroot() 171 { 172 struct mount *mp; 173 extern struct vnode *rootvp; 174 struct proc *p = curproc; /* XXX */ 175 int error; 176 struct filecore_args args; 177 178 if (device_class(root_device) != DV_DISK) 179 return (ENODEV); 180 181 /* 182 * Get vnodes for swapdev and rootdev. 183 */ 184 if (bdevvp(rootdev, &rootvp)) 185 panic("filecore_mountroot: can't setup rootvp"); 186 187 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 188 return (error); 189 190 args.flags = FILECOREMNT_ROOT; 191 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 192 vfs_unbusy(mp, false, NULL); 193 vfs_destroy(mp); 194 return (error); 195 } 196 simple_lock(&mountlist_slock); 197 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 198 simple_unlock(&mountlist_slock); 199 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 200 vfs_unbusy(mp, false, NULL); 201 return (0); 202 } 203 #endif 204 205 /* 206 * VFS Operations. 207 * 208 * mount system call 209 */ 210 int 211 filecore_mount(mp, path, data, data_len) 212 struct mount *mp; 213 const char *path; 214 void *data; 215 size_t *data_len; 216 { 217 struct lwp *l = curlwp; 218 struct nameidata nd; 219 struct vnode *devvp; 220 struct filecore_args *args = data; 221 int error; 222 struct filecore_mnt *fcmp = NULL; 223 224 if (*data_len < sizeof *args) 225 return EINVAL; 226 227 if (mp->mnt_flag & MNT_GETARGS) { 228 fcmp = VFSTOFILECORE(mp); 229 if (fcmp == NULL) 230 return EIO; 231 args->flags = fcmp->fc_mntflags; 232 args->uid = fcmp->fc_uid; 233 args->gid = fcmp->fc_gid; 234 args->fspec = NULL; 235 *data_len = sizeof *args; 236 return 0; 237 } 238 239 if ((mp->mnt_flag & MNT_RDONLY) == 0) 240 return (EROFS); 241 242 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 243 return EINVAL; 244 245 /* 246 * Not an update, or updating the name: look up the name 247 * and verify that it refers to a sensible block device. 248 */ 249 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 250 if ((error = namei(&nd)) != 0) 251 return (error); 252 devvp = nd.ni_vp; 253 254 if (devvp->v_type != VBLK) { 255 vrele(devvp); 256 return ENOTBLK; 257 } 258 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 259 vrele(devvp); 260 return ENXIO; 261 } 262 /* 263 * If mount by non-root, then verify that user has necessary 264 * permissions on the device. 265 */ 266 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 267 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 268 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 269 VOP_UNLOCK(devvp, 0); 270 if (error) { 271 vrele(devvp); 272 return (error); 273 } 274 } 275 if ((mp->mnt_flag & MNT_UPDATE) == 0) 276 error = filecore_mountfs(devvp, mp, l, args); 277 else { 278 if (devvp != fcmp->fc_devvp) 279 error = EINVAL; /* needs translation */ 280 else 281 vrele(devvp); 282 } 283 if (error) { 284 vrele(devvp); 285 return error; 286 } 287 fcmp = VFSTOFILECORE(mp); 288 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 289 mp->mnt_op->vfs_name, mp, l); 290 } 291 292 /* 293 * Common code for mount and mountroot 294 */ 295 static int 296 filecore_mountfs(devvp, mp, l, argp) 297 struct vnode *devvp; 298 struct mount *mp; 299 struct lwp *l; 300 struct filecore_args *argp; 301 { 302 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 303 struct buf *bp = NULL; 304 dev_t dev = devvp->v_rdev; 305 int error = EINVAL; 306 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 307 struct filecore_disc_record *fcdr; 308 unsigned map; 309 unsigned log2secsize; 310 311 if (!ronly) 312 return EROFS; 313 314 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 315 return (error); 316 317 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 318 if (error) 319 return error; 320 321 /* Read the filecore boot block to check FS validity and to find the map */ 322 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 323 FILECORE_BOOTBLOCK_SIZE, NOCRED, 0, &bp); 324 #ifdef FILECORE_DEBUG_BR 325 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 326 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 327 bp, error); 328 #endif 329 if (error != 0) 330 goto out; 331 332 KASSERT(bp != NULL); 333 if (filecore_bbchecksum(bp->b_data) != 0) { 334 error = EINVAL; 335 goto out; 336 } 337 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 338 FILECORE_BB_DISCREC); 339 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 340 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 341 << fcdr->log2bpmb) >> fcdr->log2secsize; 342 log2secsize = fcdr->log2secsize; 343 #ifdef FILECORE_DEBUG_BR 344 printf("brelse(%p) vf1\n", bp); 345 #endif 346 brelse(bp, BC_AGE); 347 bp = NULL; 348 349 /* Read the bootblock in the map */ 350 error = bread(devvp, map, 1 << log2secsize, NOCRED, 0, &bp); 351 #ifdef FILECORE_DEBUG_BR 352 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 353 map, 1 << log2secsize, bp, error); 354 #endif 355 if (error != 0) 356 goto out; 357 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 358 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 359 memset(fcmp, 0, sizeof *fcmp); 360 if (fcdr->log2bpmb > fcdr->log2secsize) 361 fcmp->log2bsize = fcdr->log2bpmb; 362 else fcmp->log2bsize = fcdr->log2secsize; 363 fcmp->blksize = 1 << fcmp->log2bsize; 364 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 365 fcmp->map = map; 366 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 367 / (fcdr->idlen + 1); 368 fcmp->mask = (1 << fcdr->idlen) - 1; 369 if (fcdr->big_flag & 1) { 370 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 371 + fcdr->disc_size) / fcmp->blksize; 372 } else { 373 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 374 } 375 376 #ifdef FILECORE_DEBUG_BR 377 printf("brelse(%p) vf2\n", bp); 378 #endif 379 brelse(bp, BC_AGE); 380 bp = NULL; 381 382 mp->mnt_data = fcmp; 383 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 384 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 385 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 386 mp->mnt_stat.f_namemax = 10; 387 mp->mnt_flag |= MNT_LOCAL; 388 mp->mnt_dev_bshift = fcdr->log2secsize; 389 mp->mnt_fs_bshift = fcmp->log2bsize; 390 391 fcmp->fc_mountp = mp; 392 fcmp->fc_dev = dev; 393 fcmp->fc_devvp = devvp; 394 fcmp->fc_mntflags = argp->flags; 395 if (argp->flags & FILECOREMNT_USEUID) { 396 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 397 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 398 } else { 399 fcmp->fc_uid = argp->uid; 400 fcmp->fc_gid = argp->gid; 401 } 402 403 return 0; 404 out: 405 if (bp) { 406 #ifdef FILECORE_DEBUG_BR 407 printf("brelse(%p) vf3\n", bp); 408 #endif 409 brelse(bp, 0); 410 } 411 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 412 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 413 VOP_UNLOCK(devvp, 0); 414 return error; 415 } 416 417 /* 418 * Make a filesystem operational. 419 * Nothing to do at the moment. 420 */ 421 /* ARGSUSED */ 422 int 423 filecore_start(mp, flags) 424 struct mount *mp; 425 int flags; 426 { 427 return 0; 428 } 429 430 /* 431 * unmount system call 432 */ 433 int 434 filecore_unmount(mp, mntflags) 435 struct mount *mp; 436 int mntflags; 437 { 438 struct filecore_mnt *fcmp; 439 int error, flags = 0; 440 441 if (mntflags & MNT_FORCE) 442 flags |= FORCECLOSE; 443 if ((error = vflush(mp, NULLVP, flags)) != 0) 444 return (error); 445 446 fcmp = VFSTOFILECORE(mp); 447 448 if (fcmp->fc_devvp->v_type != VBAD) 449 fcmp->fc_devvp->v_specmountpoint = NULL; 450 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 451 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 452 vput(fcmp->fc_devvp); 453 free(fcmp, M_FILECOREMNT); 454 mp->mnt_data = NULL; 455 mp->mnt_flag &= ~MNT_LOCAL; 456 return (error); 457 } 458 459 /* 460 * Return root of a filesystem 461 */ 462 int 463 filecore_root(mp, vpp) 464 struct mount *mp; 465 struct vnode **vpp; 466 { 467 struct vnode *nvp; 468 int error; 469 470 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 471 return (error); 472 *vpp = nvp; 473 return (0); 474 } 475 476 /* 477 * Get file system statistics. 478 */ 479 int 480 filecore_statvfs(mp, sbp) 481 struct mount *mp; 482 struct statvfs *sbp; 483 { 484 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 485 486 sbp->f_bsize = fcmp->blksize; 487 sbp->f_frsize = sbp->f_bsize; /* XXX */ 488 sbp->f_iosize = sbp->f_bsize; /* XXX */ 489 sbp->f_blocks = fcmp->nblks; 490 sbp->f_bfree = 0; /* total free blocks */ 491 sbp->f_bavail = 0; /* blocks free for non superuser */ 492 sbp->f_bresvd = 0; /* reserved blocks */ 493 sbp->f_files = 0; /* total files */ 494 sbp->f_ffree = 0; /* free file nodes for non superuser */ 495 sbp->f_favail = 0; /* free file nodes */ 496 sbp->f_fresvd = 0; /* reserved file nodes */ 497 copy_statvfs_info(sbp, mp); 498 return 0; 499 } 500 501 /* ARGSUSED */ 502 int 503 filecore_sync(mp, waitfor, cred) 504 struct mount *mp; 505 int waitfor; 506 kauth_cred_t cred; 507 { 508 return (0); 509 } 510 511 /* 512 * File handle to vnode 513 * 514 * Have to be really careful about stale file handles: 515 * - check that the inode number is in range 516 * - call iget() to get the locked inode 517 * - check for an unallocated inode (i_mode == 0) 518 * - check that the generation number matches 519 */ 520 521 struct ifid { 522 ushort ifid_len; 523 ushort ifid_pad; 524 u_int32_t ifid_ino; 525 }; 526 527 /* ARGSUSED */ 528 int 529 filecore_fhtovp(mp, fhp, vpp) 530 struct mount *mp; 531 struct fid *fhp; 532 struct vnode **vpp; 533 { 534 struct ifid ifh; 535 struct vnode *nvp; 536 struct filecore_node *ip; 537 int error; 538 539 if (fhp->fid_len != sizeof(struct ifid)) 540 return EINVAL; 541 542 memcpy(&ifh, fhp, sizeof(ifh)); 543 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 544 *vpp = NULLVP; 545 return (error); 546 } 547 ip = VTOI(nvp); 548 if (filecore_staleinode(ip)) { 549 vput(nvp); 550 *vpp = NULLVP; 551 return (ESTALE); 552 } 553 *vpp = nvp; 554 return (0); 555 } 556 557 /* This looks complicated. Look at other vgets as well as the iso9660 one. 558 * 559 * The filecore inode number is made up of 1 byte directory entry index and 560 * 3 bytes of the internal disc address of the directory. On a read-only 561 * filesystem this is unique. For a read-write version we may not be able to 562 * do vget, see msdosfs. 563 */ 564 565 int 566 filecore_vget(mp, ino, vpp) 567 struct mount *mp; 568 ino_t ino; 569 struct vnode **vpp; 570 { 571 struct filecore_mnt *fcmp; 572 struct filecore_node *ip; 573 struct buf *bp; 574 struct vnode *vp; 575 dev_t dev; 576 int error; 577 578 fcmp = VFSTOFILECORE(mp); 579 dev = fcmp->fc_dev; 580 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 581 return (0); 582 583 /* Allocate a new vnode/filecore_node. */ 584 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 585 != 0) { 586 *vpp = NULLVP; 587 return (error); 588 } 589 ip = pool_get(&filecore_node_pool, PR_WAITOK); 590 memset(ip, 0, sizeof(struct filecore_node)); 591 vp->v_data = ip; 592 ip->i_vnode = vp; 593 ip->i_dev = dev; 594 ip->i_number = ino; 595 ip->i_block = -1; 596 ip->i_parent = -2; 597 genfs_node_init(vp, &filecore_genfsops); 598 599 /* 600 * Put it onto its hash chain and lock it so that other requests for 601 * this inode will block if they arrive while we are sleeping waiting 602 * for old data structures to be purged or for the contents of the 603 * disk portion of this inode to be read. 604 */ 605 filecore_ihashins(ip); 606 607 if (ino == FILECORE_ROOTINO) { 608 /* Here we need to construct a root directory inode */ 609 memcpy(ip->i_dirent.name, "root", 4); 610 ip->i_dirent.load = 0; 611 ip->i_dirent.exec = 0; 612 ip->i_dirent.len = FILECORE_DIR_SIZE; 613 ip->i_dirent.addr = fcmp->drec.root; 614 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 615 616 } else { 617 /* Read in Data from Directory Entry */ 618 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 619 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 620 vput(vp); 621 #ifdef FILECORE_DEBUG_BR 622 printf("brelse(%p) vf4\n", bp); 623 #endif 624 brelse(bp, 0); 625 *vpp = NULL; 626 return (error); 627 } 628 629 memcpy(&ip->i_dirent, 630 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 631 sizeof(struct filecore_direntry)); 632 #ifdef FILECORE_DEBUG_BR 633 printf("brelse(%p) vf5\n", bp); 634 #endif 635 brelse(bp, 0); 636 } 637 638 ip->i_mnt = fcmp; 639 ip->i_devvp = fcmp->fc_devvp; 640 ip->i_diroff = 0; 641 VREF(ip->i_devvp); 642 643 /* 644 * Setup type 645 */ 646 vp->v_type = VREG; 647 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 648 vp->v_type = VDIR; 649 650 /* 651 * Initialize the associated vnode 652 */ 653 switch (vp->v_type) { 654 case VFIFO: 655 case VCHR: 656 case VBLK: 657 /* 658 * Devices not supported. 659 */ 660 vput(vp); 661 return (EOPNOTSUPP); 662 case VLNK: 663 case VNON: 664 case VSOCK: 665 case VDIR: 666 case VBAD: 667 case VREG: 668 break; 669 } 670 671 if (ino == FILECORE_ROOTINO) 672 vp->v_vflag |= VV_ROOT; 673 674 /* 675 * XXX need generation number? 676 */ 677 678 uvm_vnp_setsize(vp, ip->i_size); 679 *vpp = vp; 680 return (0); 681 } 682 683 /* 684 * Vnode pointer to File handle 685 */ 686 /* ARGSUSED */ 687 int 688 filecore_vptofh(vp, fhp, fh_size) 689 struct vnode *vp; 690 struct fid *fhp; 691 size_t *fh_size; 692 { 693 struct filecore_node *ip = VTOI(vp); 694 struct ifid ifh; 695 696 if (*fh_size < sizeof(struct ifid)) { 697 *fh_size = sizeof(struct ifid); 698 return E2BIG; 699 } 700 memset(&ifh, 0, sizeof(ifh)); 701 ifh.ifid_len = sizeof(struct ifid); 702 ifh.ifid_ino = ip->i_number; 703 memcpy(fhp, &ifh, sizeof(ifh)); 704 return 0; 705 } 706 707 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 708 { 709 710 sysctl_createv(clog, 0, NULL, NULL, 711 CTLFLAG_PERMANENT, 712 CTLTYPE_NODE, "vfs", NULL, 713 NULL, 0, NULL, 0, 714 CTL_VFS, CTL_EOL); 715 sysctl_createv(clog, 0, NULL, NULL, 716 CTLFLAG_PERMANENT, 717 CTLTYPE_NODE, "filecore", 718 SYSCTL_DESCR("Acorn FILECORE file system"), 719 NULL, 0, NULL, 0, 720 CTL_VFS, 19, CTL_EOL); 721 /* 722 * XXX the "19" above could be dynamic, thereby eliminating 723 * one more instance of the "number to vfs" mapping problem, 724 * but "19" is the order as taken from sys/mount.h 725 */ 726 } 727
Indexes created Wed Oct 01 12:09:54 GMT 2025