filecore_vfsops.c revision 1.52.2.2
1 /* $NetBSD: filecore_vfsops.c,v 1.52.2.2 2008/09/18 04:36:55 wrstuden 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 1.52.2.2 2008/09/18 04:36:55 wrstuden 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 static struct sysctllog *filecore_sysctl_log; 107 108 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 109 110 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 111 &filecore_vnodeop_opv_desc, 112 NULL, 113 }; 114 115 struct vfsops filecore_vfsops = { 116 MOUNT_FILECORE, 117 sizeof (struct filecore_args), 118 filecore_mount, 119 filecore_start, 120 filecore_unmount, 121 filecore_root, 122 (void *)eopnotsupp, /* vfs_quotactl */ 123 filecore_statvfs, 124 filecore_sync, 125 filecore_vget, 126 filecore_fhtovp, 127 filecore_vptofh, 128 filecore_init, 129 filecore_reinit, 130 filecore_done, 131 NULL, /* filecore_mountroot */ 132 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 133 vfs_stdextattrctl, 134 (void *)eopnotsupp, /* vfs_suspendctl */ 135 genfs_renamelock_enter, 136 genfs_renamelock_exit, 137 (void *)eopnotsupp, 138 filecore_vnodeopv_descs, 139 0, 140 { NULL, NULL } 141 }; 142 143 static const struct genfs_ops filecore_genfsops = { 144 .gop_size = genfs_size, 145 }; 146 147 static int 148 filecorefs_modcmd(modcmd_t cmd, void *arg) 149 { 150 int error; 151 152 switch (cmd) { 153 case MODULE_CMD_INIT: 154 error = vfs_attach(&filecore_vfsops); 155 if (error != 0) 156 break; 157 sysctl_createv(&filecore_sysctl_log, 0, NULL, NULL, 158 CTLFLAG_PERMANENT, 159 CTLTYPE_NODE, "vfs", NULL, 160 NULL, 0, NULL, 0, 161 CTL_VFS, CTL_EOL); 162 sysctl_createv(&filecore_sysctl_log, 0, NULL, NULL, 163 CTLFLAG_PERMANENT, 164 CTLTYPE_NODE, "filecore", 165 SYSCTL_DESCR("Acorn FILECORE file system"), 166 NULL, 0, NULL, 0, 167 CTL_VFS, 19, CTL_EOL); 168 /* 169 * XXX the "19" above could be dynamic, thereby eliminating 170 * one more instance of the "number to vfs" mapping problem, 171 * but "19" is the order as taken from sys/mount.h 172 */ 173 break; 174 case MODULE_CMD_FINI: 175 error = vfs_detach(&filecore_vfsops); 176 if (error != 0) 177 break; 178 sysctl_teardown(&filecore_sysctl_log); 179 break; 180 default: 181 error = ENOTTY; 182 break; 183 } 184 185 return (error); 186 } 187 188 /* 189 * Called by vfs_mountroot when iso is going to be mounted as root. 190 * 191 * Name is updated by mount(8) after booting. 192 */ 193 194 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 195 struct lwp *l, struct filecore_args *argp)); 196 197 #if 0 198 int 199 filecore_mountroot() 200 { 201 struct mount *mp; 202 extern struct vnode *rootvp; 203 struct proc *p = curproc; /* XXX */ 204 int error; 205 struct filecore_args args; 206 207 if (device_class(root_device) != DV_DISK) 208 return (ENODEV); 209 210 /* 211 * Get vnodes for swapdev and rootdev. 212 */ 213 if (bdevvp(rootdev, &rootvp)) 214 panic("filecore_mountroot: can't setup rootvp"); 215 216 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 217 return (error); 218 219 args.flags = FILECOREMNT_ROOT; 220 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 221 vfs_unbusy(mp, false, NULL); 222 vfs_destroy(mp); 223 return (error); 224 } 225 simple_lock(&mountlist_slock); 226 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 227 simple_unlock(&mountlist_slock); 228 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 229 vfs_unbusy(mp, false, NULL); 230 return (0); 231 } 232 #endif 233 234 /* 235 * VFS Operations. 236 * 237 * mount system call 238 */ 239 int 240 filecore_mount(mp, path, data, data_len) 241 struct mount *mp; 242 const char *path; 243 void *data; 244 size_t *data_len; 245 { 246 struct lwp *l = curlwp; 247 struct nameidata nd; 248 struct vnode *devvp; 249 struct filecore_args *args = data; 250 int error; 251 struct filecore_mnt *fcmp = NULL; 252 253 if (*data_len < sizeof *args) 254 return EINVAL; 255 256 if (mp->mnt_flag & MNT_GETARGS) { 257 fcmp = VFSTOFILECORE(mp); 258 if (fcmp == NULL) 259 return EIO; 260 args->flags = fcmp->fc_mntflags; 261 args->uid = fcmp->fc_uid; 262 args->gid = fcmp->fc_gid; 263 args->fspec = NULL; 264 *data_len = sizeof *args; 265 return 0; 266 } 267 268 if ((mp->mnt_flag & MNT_RDONLY) == 0) 269 return (EROFS); 270 271 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 272 return EINVAL; 273 274 /* 275 * Not an update, or updating the name: look up the name 276 * and verify that it refers to a sensible block device. 277 */ 278 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 279 if ((error = namei(&nd)) != 0) 280 return (error); 281 devvp = nd.ni_vp; 282 283 if (devvp->v_type != VBLK) { 284 vrele(devvp); 285 return ENOTBLK; 286 } 287 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 288 vrele(devvp); 289 return ENXIO; 290 } 291 /* 292 * If mount by non-root, then verify that user has necessary 293 * permissions on the device. 294 */ 295 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 296 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 297 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 298 VOP_UNLOCK(devvp, 0); 299 if (error) { 300 vrele(devvp); 301 return (error); 302 } 303 } 304 if ((mp->mnt_flag & MNT_UPDATE) == 0) 305 error = filecore_mountfs(devvp, mp, l, args); 306 else { 307 if (devvp != fcmp->fc_devvp) 308 error = EINVAL; /* needs translation */ 309 else 310 vrele(devvp); 311 } 312 if (error) { 313 vrele(devvp); 314 return error; 315 } 316 fcmp = VFSTOFILECORE(mp); 317 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 318 mp->mnt_op->vfs_name, mp, l); 319 } 320 321 /* 322 * Common code for mount and mountroot 323 */ 324 static int 325 filecore_mountfs(devvp, mp, l, argp) 326 struct vnode *devvp; 327 struct mount *mp; 328 struct lwp *l; 329 struct filecore_args *argp; 330 { 331 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 332 struct buf *bp = NULL; 333 dev_t dev = devvp->v_rdev; 334 int error = EINVAL; 335 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 336 struct filecore_disc_record *fcdr; 337 unsigned map; 338 unsigned log2secsize; 339 340 if (!ronly) 341 return EROFS; 342 343 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 344 return (error); 345 346 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 347 if (error) 348 return error; 349 350 /* Read the filecore boot block to check FS validity and to find the map */ 351 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 352 FILECORE_BOOTBLOCK_SIZE, NOCRED, 0, &bp); 353 #ifdef FILECORE_DEBUG_BR 354 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 355 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 356 bp, error); 357 #endif 358 if (error != 0) 359 goto out; 360 361 KASSERT(bp != NULL); 362 if (filecore_bbchecksum(bp->b_data) != 0) { 363 error = EINVAL; 364 goto out; 365 } 366 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 367 FILECORE_BB_DISCREC); 368 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 369 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 370 << fcdr->log2bpmb) >> fcdr->log2secsize; 371 log2secsize = fcdr->log2secsize; 372 #ifdef FILECORE_DEBUG_BR 373 printf("brelse(%p) vf1\n", bp); 374 #endif 375 brelse(bp, BC_AGE); 376 bp = NULL; 377 378 /* Read the bootblock in the map */ 379 error = bread(devvp, map, 1 << log2secsize, NOCRED, 0, &bp); 380 #ifdef FILECORE_DEBUG_BR 381 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 382 map, 1 << log2secsize, bp, error); 383 #endif 384 if (error != 0) 385 goto out; 386 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 387 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 388 memset(fcmp, 0, sizeof *fcmp); 389 if (fcdr->log2bpmb > fcdr->log2secsize) 390 fcmp->log2bsize = fcdr->log2bpmb; 391 else fcmp->log2bsize = fcdr->log2secsize; 392 fcmp->blksize = 1 << fcmp->log2bsize; 393 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 394 fcmp->map = map; 395 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 396 / (fcdr->idlen + 1); 397 fcmp->mask = (1 << fcdr->idlen) - 1; 398 if (fcdr->big_flag & 1) { 399 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 400 + fcdr->disc_size) / fcmp->blksize; 401 } else { 402 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 403 } 404 405 #ifdef FILECORE_DEBUG_BR 406 printf("brelse(%p) vf2\n", bp); 407 #endif 408 brelse(bp, BC_AGE); 409 bp = NULL; 410 411 mp->mnt_data = fcmp; 412 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 413 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 414 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 415 mp->mnt_stat.f_namemax = 10; 416 mp->mnt_flag |= MNT_LOCAL; 417 mp->mnt_dev_bshift = fcdr->log2secsize; 418 mp->mnt_fs_bshift = fcmp->log2bsize; 419 420 fcmp->fc_mountp = mp; 421 fcmp->fc_dev = dev; 422 fcmp->fc_devvp = devvp; 423 fcmp->fc_mntflags = argp->flags; 424 if (argp->flags & FILECOREMNT_USEUID) { 425 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 426 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 427 } else { 428 fcmp->fc_uid = argp->uid; 429 fcmp->fc_gid = argp->gid; 430 } 431 432 return 0; 433 out: 434 if (bp) { 435 #ifdef FILECORE_DEBUG_BR 436 printf("brelse(%p) vf3\n", bp); 437 #endif 438 brelse(bp, 0); 439 } 440 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 441 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 442 VOP_UNLOCK(devvp, 0); 443 return error; 444 } 445 446 /* 447 * Make a filesystem operational. 448 * Nothing to do at the moment. 449 */ 450 /* ARGSUSED */ 451 int 452 filecore_start(mp, flags) 453 struct mount *mp; 454 int flags; 455 { 456 return 0; 457 } 458 459 /* 460 * unmount system call 461 */ 462 int 463 filecore_unmount(mp, mntflags) 464 struct mount *mp; 465 int mntflags; 466 { 467 struct filecore_mnt *fcmp; 468 int error, flags = 0; 469 470 if (mntflags & MNT_FORCE) 471 flags |= FORCECLOSE; 472 if ((error = vflush(mp, NULLVP, flags)) != 0) 473 return (error); 474 475 fcmp = VFSTOFILECORE(mp); 476 477 if (fcmp->fc_devvp->v_type != VBAD) 478 fcmp->fc_devvp->v_specmountpoint = NULL; 479 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 480 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 481 vput(fcmp->fc_devvp); 482 free(fcmp, M_FILECOREMNT); 483 mp->mnt_data = NULL; 484 mp->mnt_flag &= ~MNT_LOCAL; 485 return (error); 486 } 487 488 /* 489 * Return root of a filesystem 490 */ 491 int 492 filecore_root(mp, vpp) 493 struct mount *mp; 494 struct vnode **vpp; 495 { 496 struct vnode *nvp; 497 int error; 498 499 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 500 return (error); 501 *vpp = nvp; 502 return (0); 503 } 504 505 /* 506 * Get file system statistics. 507 */ 508 int 509 filecore_statvfs(mp, sbp) 510 struct mount *mp; 511 struct statvfs *sbp; 512 { 513 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 514 515 sbp->f_bsize = fcmp->blksize; 516 sbp->f_frsize = sbp->f_bsize; /* XXX */ 517 sbp->f_iosize = sbp->f_bsize; /* XXX */ 518 sbp->f_blocks = fcmp->nblks; 519 sbp->f_bfree = 0; /* total free blocks */ 520 sbp->f_bavail = 0; /* blocks free for non superuser */ 521 sbp->f_bresvd = 0; /* reserved blocks */ 522 sbp->f_files = 0; /* total files */ 523 sbp->f_ffree = 0; /* free file nodes for non superuser */ 524 sbp->f_favail = 0; /* free file nodes */ 525 sbp->f_fresvd = 0; /* reserved file nodes */ 526 copy_statvfs_info(sbp, mp); 527 return 0; 528 } 529 530 /* ARGSUSED */ 531 int 532 filecore_sync(mp, waitfor, cred) 533 struct mount *mp; 534 int waitfor; 535 kauth_cred_t cred; 536 { 537 return (0); 538 } 539 540 /* 541 * File handle to vnode 542 * 543 * Have to be really careful about stale file handles: 544 * - check that the inode number is in range 545 * - call iget() to get the locked inode 546 * - check for an unallocated inode (i_mode == 0) 547 * - check that the generation number matches 548 */ 549 550 struct ifid { 551 ushort ifid_len; 552 ushort ifid_pad; 553 u_int32_t ifid_ino; 554 }; 555 556 /* ARGSUSED */ 557 int 558 filecore_fhtovp(mp, fhp, vpp) 559 struct mount *mp; 560 struct fid *fhp; 561 struct vnode **vpp; 562 { 563 struct ifid ifh; 564 struct vnode *nvp; 565 struct filecore_node *ip; 566 int error; 567 568 if (fhp->fid_len != sizeof(struct ifid)) 569 return EINVAL; 570 571 memcpy(&ifh, fhp, sizeof(ifh)); 572 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 573 *vpp = NULLVP; 574 return (error); 575 } 576 ip = VTOI(nvp); 577 if (filecore_staleinode(ip)) { 578 vput(nvp); 579 *vpp = NULLVP; 580 return (ESTALE); 581 } 582 *vpp = nvp; 583 return (0); 584 } 585 586 /* This looks complicated. Look at other vgets as well as the iso9660 one. 587 * 588 * The filecore inode number is made up of 1 byte directory entry index and 589 * 3 bytes of the internal disc address of the directory. On a read-only 590 * filesystem this is unique. For a read-write version we may not be able to 591 * do vget, see msdosfs. 592 */ 593 594 int 595 filecore_vget(mp, ino, vpp) 596 struct mount *mp; 597 ino_t ino; 598 struct vnode **vpp; 599 { 600 struct filecore_mnt *fcmp; 601 struct filecore_node *ip; 602 struct buf *bp; 603 struct vnode *vp; 604 dev_t dev; 605 int error; 606 607 fcmp = VFSTOFILECORE(mp); 608 dev = fcmp->fc_dev; 609 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 610 return (0); 611 612 /* Allocate a new vnode/filecore_node. */ 613 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 614 != 0) { 615 *vpp = NULLVP; 616 return (error); 617 } 618 ip = pool_get(&filecore_node_pool, PR_WAITOK); 619 memset(ip, 0, sizeof(struct filecore_node)); 620 vp->v_data = ip; 621 ip->i_vnode = vp; 622 ip->i_dev = dev; 623 ip->i_number = ino; 624 ip->i_block = -1; 625 ip->i_parent = -2; 626 genfs_node_init(vp, &filecore_genfsops); 627 628 /* 629 * Put it onto its hash chain and lock it so that other requests for 630 * this inode will block if they arrive while we are sleeping waiting 631 * for old data structures to be purged or for the contents of the 632 * disk portion of this inode to be read. 633 */ 634 filecore_ihashins(ip); 635 636 if (ino == FILECORE_ROOTINO) { 637 /* Here we need to construct a root directory inode */ 638 memcpy(ip->i_dirent.name, "root", 4); 639 ip->i_dirent.load = 0; 640 ip->i_dirent.exec = 0; 641 ip->i_dirent.len = FILECORE_DIR_SIZE; 642 ip->i_dirent.addr = fcmp->drec.root; 643 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 644 645 } else { 646 /* Read in Data from Directory Entry */ 647 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 648 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 649 vput(vp); 650 #ifdef FILECORE_DEBUG_BR 651 printf("brelse(%p) vf4\n", bp); 652 #endif 653 brelse(bp, 0); 654 *vpp = NULL; 655 return (error); 656 } 657 658 memcpy(&ip->i_dirent, 659 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 660 sizeof(struct filecore_direntry)); 661 #ifdef FILECORE_DEBUG_BR 662 printf("brelse(%p) vf5\n", bp); 663 #endif 664 brelse(bp, 0); 665 } 666 667 ip->i_mnt = fcmp; 668 ip->i_devvp = fcmp->fc_devvp; 669 ip->i_diroff = 0; 670 VREF(ip->i_devvp); 671 672 /* 673 * Setup type 674 */ 675 vp->v_type = VREG; 676 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 677 vp->v_type = VDIR; 678 679 /* 680 * Initialize the associated vnode 681 */ 682 switch (vp->v_type) { 683 case VFIFO: 684 case VCHR: 685 case VBLK: 686 /* 687 * Devices not supported. 688 */ 689 vput(vp); 690 return (EOPNOTSUPP); 691 case VLNK: 692 case VNON: 693 case VSOCK: 694 case VDIR: 695 case VBAD: 696 case VREG: 697 break; 698 } 699 700 if (ino == FILECORE_ROOTINO) 701 vp->v_vflag |= VV_ROOT; 702 703 /* 704 * XXX need generation number? 705 */ 706 707 uvm_vnp_setsize(vp, ip->i_size); 708 *vpp = vp; 709 return (0); 710 } 711 712 /* 713 * Vnode pointer to File handle 714 */ 715 /* ARGSUSED */ 716 int 717 filecore_vptofh(vp, fhp, fh_size) 718 struct vnode *vp; 719 struct fid *fhp; 720 size_t *fh_size; 721 { 722 struct filecore_node *ip = VTOI(vp); 723 struct ifid ifh; 724 725 if (*fh_size < sizeof(struct ifid)) { 726 *fh_size = sizeof(struct ifid); 727 return E2BIG; 728 } 729 memset(&ifh, 0, sizeof(ifh)); 730 ifh.ifid_len = sizeof(struct ifid); 731 ifh.ifid_ino = ip->i_number; 732 memcpy(fhp, &ifh, sizeof(ifh)); 733 return 0; 734 } 735
Indexes created Wed Oct 01 12:09:54 GMT 2025