filecore_vfsops.c revision 1.55.16.1
1 /* $NetBSD: filecore_vfsops.c,v 1.55.16.1 2014/04/28 16:03:14 sborrill 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 1.55.16.1 2014/04/28 16:03:14 sborrill 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 (args == NULL) 254 return EINVAL; 255 if (*data_len < sizeof *args) 256 return EINVAL; 257 258 if (mp->mnt_flag & MNT_GETARGS) { 259 fcmp = VFSTOFILECORE(mp); 260 if (fcmp == NULL) 261 return EIO; 262 args->flags = fcmp->fc_mntflags; 263 args->uid = fcmp->fc_uid; 264 args->gid = fcmp->fc_gid; 265 args->fspec = NULL; 266 *data_len = sizeof *args; 267 return 0; 268 } 269 270 if ((mp->mnt_flag & MNT_RDONLY) == 0) 271 return (EROFS); 272 273 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 274 return EINVAL; 275 276 /* 277 * Not an update, or updating the name: look up the name 278 * and verify that it refers to a sensible block device. 279 */ 280 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 281 if ((error = namei(&nd)) != 0) 282 return (error); 283 devvp = nd.ni_vp; 284 285 if (devvp->v_type != VBLK) { 286 vrele(devvp); 287 return ENOTBLK; 288 } 289 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 290 vrele(devvp); 291 return ENXIO; 292 } 293 /* 294 * If mount by non-root, then verify that user has necessary 295 * permissions on the device. 296 */ 297 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 298 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 299 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 300 VOP_UNLOCK(devvp, 0); 301 if (error) { 302 vrele(devvp); 303 return (error); 304 } 305 } 306 if ((mp->mnt_flag & MNT_UPDATE) == 0) 307 error = filecore_mountfs(devvp, mp, l, args); 308 else { 309 if (devvp != fcmp->fc_devvp) 310 error = EINVAL; /* needs translation */ 311 else 312 vrele(devvp); 313 } 314 if (error) { 315 vrele(devvp); 316 return error; 317 } 318 fcmp = VFSTOFILECORE(mp); 319 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 320 mp->mnt_op->vfs_name, mp, l); 321 } 322 323 /* 324 * Common code for mount and mountroot 325 */ 326 static int 327 filecore_mountfs(devvp, mp, l, argp) 328 struct vnode *devvp; 329 struct mount *mp; 330 struct lwp *l; 331 struct filecore_args *argp; 332 { 333 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 334 struct buf *bp = NULL; 335 dev_t dev = devvp->v_rdev; 336 int error = EINVAL; 337 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 338 struct filecore_disc_record *fcdr; 339 unsigned map; 340 unsigned log2secsize; 341 342 if (!ronly) 343 return EROFS; 344 345 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 346 return (error); 347 348 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 349 if (error) 350 return error; 351 352 /* Read the filecore boot block to check FS validity and to find the map */ 353 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 354 FILECORE_BOOTBLOCK_SIZE, NOCRED, 0, &bp); 355 #ifdef FILECORE_DEBUG_BR 356 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 357 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 358 bp, error); 359 #endif 360 if (error != 0) 361 goto out; 362 363 KASSERT(bp != NULL); 364 if (filecore_bbchecksum(bp->b_data) != 0) { 365 error = EINVAL; 366 goto out; 367 } 368 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 369 FILECORE_BB_DISCREC); 370 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 371 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 372 << fcdr->log2bpmb) >> fcdr->log2secsize; 373 log2secsize = fcdr->log2secsize; 374 #ifdef FILECORE_DEBUG_BR 375 printf("brelse(%p) vf1\n", bp); 376 #endif 377 brelse(bp, BC_AGE); 378 bp = NULL; 379 380 /* Read the bootblock in the map */ 381 error = bread(devvp, map, 1 << log2secsize, NOCRED, 0, &bp); 382 #ifdef FILECORE_DEBUG_BR 383 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 384 map, 1 << log2secsize, bp, error); 385 #endif 386 if (error != 0) 387 goto out; 388 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 389 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 390 memset(fcmp, 0, sizeof *fcmp); 391 if (fcdr->log2bpmb > fcdr->log2secsize) 392 fcmp->log2bsize = fcdr->log2bpmb; 393 else fcmp->log2bsize = fcdr->log2secsize; 394 fcmp->blksize = 1 << fcmp->log2bsize; 395 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 396 fcmp->map = map; 397 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 398 / (fcdr->idlen + 1); 399 fcmp->mask = (1 << fcdr->idlen) - 1; 400 if (fcdr->big_flag & 1) { 401 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 402 + fcdr->disc_size) / fcmp->blksize; 403 } else { 404 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 405 } 406 407 #ifdef FILECORE_DEBUG_BR 408 printf("brelse(%p) vf2\n", bp); 409 #endif 410 brelse(bp, BC_AGE); 411 bp = NULL; 412 413 mp->mnt_data = fcmp; 414 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 415 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 416 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 417 mp->mnt_stat.f_namemax = 10; 418 mp->mnt_flag |= MNT_LOCAL; 419 mp->mnt_dev_bshift = fcdr->log2secsize; 420 mp->mnt_fs_bshift = fcmp->log2bsize; 421 422 fcmp->fc_mountp = mp; 423 fcmp->fc_dev = dev; 424 fcmp->fc_devvp = devvp; 425 fcmp->fc_mntflags = argp->flags; 426 if (argp->flags & FILECOREMNT_USEUID) { 427 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 428 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 429 } else { 430 fcmp->fc_uid = argp->uid; 431 fcmp->fc_gid = argp->gid; 432 } 433 434 return 0; 435 out: 436 if (bp) { 437 #ifdef FILECORE_DEBUG_BR 438 printf("brelse(%p) vf3\n", bp); 439 #endif 440 brelse(bp, 0); 441 } 442 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 443 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 444 VOP_UNLOCK(devvp, 0); 445 return error; 446 } 447 448 /* 449 * Make a filesystem operational. 450 * Nothing to do at the moment. 451 */ 452 /* ARGSUSED */ 453 int 454 filecore_start(mp, flags) 455 struct mount *mp; 456 int flags; 457 { 458 return 0; 459 } 460 461 /* 462 * unmount system call 463 */ 464 int 465 filecore_unmount(mp, mntflags) 466 struct mount *mp; 467 int mntflags; 468 { 469 struct filecore_mnt *fcmp; 470 int error, flags = 0; 471 472 if (mntflags & MNT_FORCE) 473 flags |= FORCECLOSE; 474 if ((error = vflush(mp, NULLVP, flags)) != 0) 475 return (error); 476 477 fcmp = VFSTOFILECORE(mp); 478 479 if (fcmp->fc_devvp->v_type != VBAD) 480 fcmp->fc_devvp->v_specmountpoint = NULL; 481 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 482 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 483 vput(fcmp->fc_devvp); 484 free(fcmp, M_FILECOREMNT); 485 mp->mnt_data = NULL; 486 mp->mnt_flag &= ~MNT_LOCAL; 487 return (error); 488 } 489 490 /* 491 * Return root of a filesystem 492 */ 493 int 494 filecore_root(mp, vpp) 495 struct mount *mp; 496 struct vnode **vpp; 497 { 498 struct vnode *nvp; 499 int error; 500 501 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 502 return (error); 503 *vpp = nvp; 504 return (0); 505 } 506 507 /* 508 * Get file system statistics. 509 */ 510 int 511 filecore_statvfs(mp, sbp) 512 struct mount *mp; 513 struct statvfs *sbp; 514 { 515 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 516 517 sbp->f_bsize = fcmp->blksize; 518 sbp->f_frsize = sbp->f_bsize; /* XXX */ 519 sbp->f_iosize = sbp->f_bsize; /* XXX */ 520 sbp->f_blocks = fcmp->nblks; 521 sbp->f_bfree = 0; /* total free blocks */ 522 sbp->f_bavail = 0; /* blocks free for non superuser */ 523 sbp->f_bresvd = 0; /* reserved blocks */ 524 sbp->f_files = 0; /* total files */ 525 sbp->f_ffree = 0; /* free file nodes for non superuser */ 526 sbp->f_favail = 0; /* free file nodes */ 527 sbp->f_fresvd = 0; /* reserved file nodes */ 528 copy_statvfs_info(sbp, mp); 529 return 0; 530 } 531 532 /* ARGSUSED */ 533 int 534 filecore_sync(mp, waitfor, cred) 535 struct mount *mp; 536 int waitfor; 537 kauth_cred_t cred; 538 { 539 return (0); 540 } 541 542 /* 543 * File handle to vnode 544 * 545 * Have to be really careful about stale file handles: 546 * - check that the inode number is in range 547 * - call iget() to get the locked inode 548 * - check for an unallocated inode (i_mode == 0) 549 * - check that the generation number matches 550 */ 551 552 struct ifid { 553 ushort ifid_len; 554 ushort ifid_pad; 555 u_int32_t ifid_ino; 556 }; 557 558 /* ARGSUSED */ 559 int 560 filecore_fhtovp(mp, fhp, vpp) 561 struct mount *mp; 562 struct fid *fhp; 563 struct vnode **vpp; 564 { 565 struct ifid ifh; 566 struct vnode *nvp; 567 struct filecore_node *ip; 568 int error; 569 570 if (fhp->fid_len != sizeof(struct ifid)) 571 return EINVAL; 572 573 memcpy(&ifh, fhp, sizeof(ifh)); 574 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 575 *vpp = NULLVP; 576 return (error); 577 } 578 ip = VTOI(nvp); 579 if (filecore_staleinode(ip)) { 580 vput(nvp); 581 *vpp = NULLVP; 582 return (ESTALE); 583 } 584 *vpp = nvp; 585 return (0); 586 } 587 588 /* This looks complicated. Look at other vgets as well as the iso9660 one. 589 * 590 * The filecore inode number is made up of 1 byte directory entry index and 591 * 3 bytes of the internal disc address of the directory. On a read-only 592 * filesystem this is unique. For a read-write version we may not be able to 593 * do vget, see msdosfs. 594 */ 595 596 int 597 filecore_vget(mp, ino, vpp) 598 struct mount *mp; 599 ino_t ino; 600 struct vnode **vpp; 601 { 602 struct filecore_mnt *fcmp; 603 struct filecore_node *ip; 604 struct buf *bp; 605 struct vnode *vp; 606 dev_t dev; 607 int error; 608 609 fcmp = VFSTOFILECORE(mp); 610 dev = fcmp->fc_dev; 611 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 612 return (0); 613 614 /* Allocate a new vnode/filecore_node. */ 615 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 616 != 0) { 617 *vpp = NULLVP; 618 return (error); 619 } 620 ip = pool_get(&filecore_node_pool, PR_WAITOK); 621 memset(ip, 0, sizeof(struct filecore_node)); 622 vp->v_data = ip; 623 ip->i_vnode = vp; 624 ip->i_dev = dev; 625 ip->i_number = ino; 626 ip->i_block = -1; 627 ip->i_parent = -2; 628 genfs_node_init(vp, &filecore_genfsops); 629 630 /* 631 * Put it onto its hash chain and lock it so that other requests for 632 * this inode will block if they arrive while we are sleeping waiting 633 * for old data structures to be purged or for the contents of the 634 * disk portion of this inode to be read. 635 */ 636 filecore_ihashins(ip); 637 638 if (ino == FILECORE_ROOTINO) { 639 /* Here we need to construct a root directory inode */ 640 memcpy(ip->i_dirent.name, "root", 4); 641 ip->i_dirent.load = 0; 642 ip->i_dirent.exec = 0; 643 ip->i_dirent.len = FILECORE_DIR_SIZE; 644 ip->i_dirent.addr = fcmp->drec.root; 645 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 646 647 } else { 648 /* Read in Data from Directory Entry */ 649 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 650 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 651 vput(vp); 652 #ifdef FILECORE_DEBUG_BR 653 printf("brelse(%p) vf4\n", bp); 654 #endif 655 brelse(bp, 0); 656 *vpp = NULL; 657 return (error); 658 } 659 660 memcpy(&ip->i_dirent, 661 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 662 sizeof(struct filecore_direntry)); 663 #ifdef FILECORE_DEBUG_BR 664 printf("brelse(%p) vf5\n", bp); 665 #endif 666 brelse(bp, 0); 667 } 668 669 ip->i_mnt = fcmp; 670 ip->i_devvp = fcmp->fc_devvp; 671 ip->i_diroff = 0; 672 VREF(ip->i_devvp); 673 674 /* 675 * Setup type 676 */ 677 vp->v_type = VREG; 678 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 679 vp->v_type = VDIR; 680 681 /* 682 * Initialize the associated vnode 683 */ 684 switch (vp->v_type) { 685 case VFIFO: 686 case VCHR: 687 case VBLK: 688 /* 689 * Devices not supported. 690 */ 691 vput(vp); 692 return (EOPNOTSUPP); 693 case VLNK: 694 case VNON: 695 case VSOCK: 696 case VDIR: 697 case VBAD: 698 case VREG: 699 break; 700 } 701 702 if (ino == FILECORE_ROOTINO) 703 vp->v_vflag |= VV_ROOT; 704 705 /* 706 * XXX need generation number? 707 */ 708 709 uvm_vnp_setsize(vp, ip->i_size); 710 *vpp = vp; 711 return (0); 712 } 713 714 /* 715 * Vnode pointer to File handle 716 */ 717 /* ARGSUSED */ 718 int 719 filecore_vptofh(vp, fhp, fh_size) 720 struct vnode *vp; 721 struct fid *fhp; 722 size_t *fh_size; 723 { 724 struct filecore_node *ip = VTOI(vp); 725 struct ifid ifh; 726 727 if (*fh_size < sizeof(struct ifid)) { 728 *fh_size = sizeof(struct ifid); 729 return E2BIG; 730 } 731 memset(&ifh, 0, sizeof(ifh)); 732 ifh.ifid_len = sizeof(struct ifid); 733 ifh.ifid_ino = ip->i_number; 734 memcpy(fhp, &ifh, sizeof(ifh)); 735 return 0; 736 } 737
Indexes created Wed Oct 01 12:09:54 GMT 2025