filecore_vfsops.c revision 1.57
1 /* $NetBSD: filecore_vfsops.c,v 1.57 2009/03/14 15:36:21 dsl 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 1.57 2009/03/14 15:36:21 dsl 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(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(struct mount *mp, const char *path, void *data, size_t *data_len) 241 { 242 struct lwp *l = curlwp; 243 struct nameidata nd; 244 struct vnode *devvp; 245 struct filecore_args *args = data; 246 int error; 247 struct filecore_mnt *fcmp = NULL; 248 249 if (*data_len < sizeof *args) 250 return EINVAL; 251 252 if (mp->mnt_flag & MNT_GETARGS) { 253 fcmp = VFSTOFILECORE(mp); 254 if (fcmp == NULL) 255 return EIO; 256 args->flags = fcmp->fc_mntflags; 257 args->uid = fcmp->fc_uid; 258 args->gid = fcmp->fc_gid; 259 args->fspec = NULL; 260 *data_len = sizeof *args; 261 return 0; 262 } 263 264 if ((mp->mnt_flag & MNT_RDONLY) == 0) 265 return (EROFS); 266 267 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 268 return EINVAL; 269 270 /* 271 * Not an update, or updating the name: look up the name 272 * and verify that it refers to a sensible block device. 273 */ 274 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec); 275 if ((error = namei(&nd)) != 0) 276 return (error); 277 devvp = nd.ni_vp; 278 279 if (devvp->v_type != VBLK) { 280 vrele(devvp); 281 return ENOTBLK; 282 } 283 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 284 vrele(devvp); 285 return ENXIO; 286 } 287 /* 288 * If mount by non-root, then verify that user has necessary 289 * permissions on the device. 290 */ 291 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 292 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 293 error = VOP_ACCESS(devvp, VREAD, l->l_cred); 294 VOP_UNLOCK(devvp, 0); 295 if (error) { 296 vrele(devvp); 297 return (error); 298 } 299 } 300 if ((mp->mnt_flag & MNT_UPDATE) == 0) 301 error = filecore_mountfs(devvp, mp, l, args); 302 else { 303 if (devvp != fcmp->fc_devvp) 304 error = EINVAL; /* needs translation */ 305 else 306 vrele(devvp); 307 } 308 if (error) { 309 vrele(devvp); 310 return error; 311 } 312 fcmp = VFSTOFILECORE(mp); 313 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 314 mp->mnt_op->vfs_name, mp, l); 315 } 316 317 /* 318 * Common code for mount and mountroot 319 */ 320 static int 321 filecore_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, struct filecore_args *argp) 322 { 323 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 324 struct buf *bp = NULL; 325 dev_t dev = devvp->v_rdev; 326 int error = EINVAL; 327 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 328 struct filecore_disc_record *fcdr; 329 unsigned map; 330 unsigned log2secsize; 331 332 if (!ronly) 333 return EROFS; 334 335 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) 336 return (error); 337 338 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED); 339 if (error) 340 return error; 341 342 /* Read the filecore boot block to check FS validity and to find the map */ 343 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 344 FILECORE_BOOTBLOCK_SIZE, NOCRED, 0, &bp); 345 #ifdef FILECORE_DEBUG_BR 346 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 347 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 348 bp, error); 349 #endif 350 if (error != 0) 351 goto out; 352 353 KASSERT(bp != NULL); 354 if (filecore_bbchecksum(bp->b_data) != 0) { 355 error = EINVAL; 356 goto out; 357 } 358 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 359 FILECORE_BB_DISCREC); 360 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 361 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 362 << fcdr->log2bpmb) >> fcdr->log2secsize; 363 log2secsize = fcdr->log2secsize; 364 #ifdef FILECORE_DEBUG_BR 365 printf("brelse(%p) vf1\n", bp); 366 #endif 367 brelse(bp, BC_AGE); 368 bp = NULL; 369 370 /* Read the bootblock in the map */ 371 error = bread(devvp, map, 1 << log2secsize, NOCRED, 0, &bp); 372 #ifdef FILECORE_DEBUG_BR 373 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 374 map, 1 << log2secsize, bp, error); 375 #endif 376 if (error != 0) 377 goto out; 378 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 379 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 380 memset(fcmp, 0, sizeof *fcmp); 381 if (fcdr->log2bpmb > fcdr->log2secsize) 382 fcmp->log2bsize = fcdr->log2bpmb; 383 else fcmp->log2bsize = fcdr->log2secsize; 384 fcmp->blksize = 1 << fcmp->log2bsize; 385 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 386 fcmp->map = map; 387 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 388 / (fcdr->idlen + 1); 389 fcmp->mask = (1 << fcdr->idlen) - 1; 390 if (fcdr->big_flag & 1) { 391 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 392 + fcdr->disc_size) / fcmp->blksize; 393 } else { 394 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 395 } 396 397 #ifdef FILECORE_DEBUG_BR 398 printf("brelse(%p) vf2\n", bp); 399 #endif 400 brelse(bp, BC_AGE); 401 bp = NULL; 402 403 mp->mnt_data = fcmp; 404 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 405 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 406 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 407 mp->mnt_stat.f_namemax = 10; 408 mp->mnt_flag |= MNT_LOCAL; 409 mp->mnt_dev_bshift = fcdr->log2secsize; 410 mp->mnt_fs_bshift = fcmp->log2bsize; 411 412 fcmp->fc_mountp = mp; 413 fcmp->fc_dev = dev; 414 fcmp->fc_devvp = devvp; 415 fcmp->fc_mntflags = argp->flags; 416 if (argp->flags & FILECOREMNT_USEUID) { 417 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 418 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 419 } else { 420 fcmp->fc_uid = argp->uid; 421 fcmp->fc_gid = argp->gid; 422 } 423 424 return 0; 425 out: 426 if (bp) { 427 #ifdef FILECORE_DEBUG_BR 428 printf("brelse(%p) vf3\n", bp); 429 #endif 430 brelse(bp, 0); 431 } 432 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 433 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED); 434 VOP_UNLOCK(devvp, 0); 435 return error; 436 } 437 438 /* 439 * Make a filesystem operational. 440 * Nothing to do at the moment. 441 */ 442 /* ARGSUSED */ 443 int 444 filecore_start(struct mount *mp, int flags) 445 { 446 return 0; 447 } 448 449 /* 450 * unmount system call 451 */ 452 int 453 filecore_unmount(struct mount *mp, int mntflags) 454 { 455 struct filecore_mnt *fcmp; 456 int error, flags = 0; 457 458 if (mntflags & MNT_FORCE) 459 flags |= FORCECLOSE; 460 if ((error = vflush(mp, NULLVP, flags)) != 0) 461 return (error); 462 463 fcmp = VFSTOFILECORE(mp); 464 465 if (fcmp->fc_devvp->v_type != VBAD) 466 fcmp->fc_devvp->v_specmountpoint = NULL; 467 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 468 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED); 469 vput(fcmp->fc_devvp); 470 free(fcmp, M_FILECOREMNT); 471 mp->mnt_data = NULL; 472 mp->mnt_flag &= ~MNT_LOCAL; 473 return (error); 474 } 475 476 /* 477 * Return root of a filesystem 478 */ 479 int 480 filecore_root(struct mount *mp, struct vnode **vpp) 481 { 482 struct vnode *nvp; 483 int error; 484 485 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 486 return (error); 487 *vpp = nvp; 488 return (0); 489 } 490 491 /* 492 * Get file system statistics. 493 */ 494 int 495 filecore_statvfs(struct mount *mp, struct statvfs *sbp) 496 { 497 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 498 499 sbp->f_bsize = fcmp->blksize; 500 sbp->f_frsize = sbp->f_bsize; /* XXX */ 501 sbp->f_iosize = sbp->f_bsize; /* XXX */ 502 sbp->f_blocks = fcmp->nblks; 503 sbp->f_bfree = 0; /* total free blocks */ 504 sbp->f_bavail = 0; /* blocks free for non superuser */ 505 sbp->f_bresvd = 0; /* reserved blocks */ 506 sbp->f_files = 0; /* total files */ 507 sbp->f_ffree = 0; /* free file nodes for non superuser */ 508 sbp->f_favail = 0; /* free file nodes */ 509 sbp->f_fresvd = 0; /* reserved file nodes */ 510 copy_statvfs_info(sbp, mp); 511 return 0; 512 } 513 514 /* ARGSUSED */ 515 int 516 filecore_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 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(struct mount *mp, struct fid *fhp, struct vnode **vpp) 540 { 541 struct ifid ifh; 542 struct vnode *nvp; 543 struct filecore_node *ip; 544 int error; 545 546 if (fhp->fid_len != sizeof(struct ifid)) 547 return EINVAL; 548 549 memcpy(&ifh, fhp, sizeof(ifh)); 550 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 551 *vpp = NULLVP; 552 return (error); 553 } 554 ip = VTOI(nvp); 555 if (filecore_staleinode(ip)) { 556 vput(nvp); 557 *vpp = NULLVP; 558 return (ESTALE); 559 } 560 *vpp = nvp; 561 return (0); 562 } 563 564 /* This looks complicated. Look at other vgets as well as the iso9660 one. 565 * 566 * The filecore inode number is made up of 1 byte directory entry index and 567 * 3 bytes of the internal disc address of the directory. On a read-only 568 * filesystem this is unique. For a read-write version we may not be able to 569 * do vget, see msdosfs. 570 */ 571 572 int 573 filecore_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 574 { 575 struct filecore_mnt *fcmp; 576 struct filecore_node *ip; 577 struct buf *bp; 578 struct vnode *vp; 579 dev_t dev; 580 int error; 581 582 fcmp = VFSTOFILECORE(mp); 583 dev = fcmp->fc_dev; 584 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 585 return (0); 586 587 /* Allocate a new vnode/filecore_node. */ 588 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 589 != 0) { 590 *vpp = NULLVP; 591 return (error); 592 } 593 ip = pool_get(&filecore_node_pool, PR_WAITOK); 594 memset(ip, 0, sizeof(struct filecore_node)); 595 vp->v_data = ip; 596 ip->i_vnode = vp; 597 ip->i_dev = dev; 598 ip->i_number = ino; 599 ip->i_block = -1; 600 ip->i_parent = -2; 601 genfs_node_init(vp, &filecore_genfsops); 602 603 /* 604 * Put it onto its hash chain and lock it so that other requests for 605 * this inode will block if they arrive while we are sleeping waiting 606 * for old data structures to be purged or for the contents of the 607 * disk portion of this inode to be read. 608 */ 609 filecore_ihashins(ip); 610 611 if (ino == FILECORE_ROOTINO) { 612 /* Here we need to construct a root directory inode */ 613 memcpy(ip->i_dirent.name, "root", 4); 614 ip->i_dirent.load = 0; 615 ip->i_dirent.exec = 0; 616 ip->i_dirent.len = FILECORE_DIR_SIZE; 617 ip->i_dirent.addr = fcmp->drec.root; 618 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 619 620 } else { 621 /* Read in Data from Directory Entry */ 622 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 623 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 624 vput(vp); 625 #ifdef FILECORE_DEBUG_BR 626 printf("brelse(%p) vf4\n", bp); 627 #endif 628 brelse(bp, 0); 629 *vpp = NULL; 630 return (error); 631 } 632 633 memcpy(&ip->i_dirent, 634 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 635 sizeof(struct filecore_direntry)); 636 #ifdef FILECORE_DEBUG_BR 637 printf("brelse(%p) vf5\n", bp); 638 #endif 639 brelse(bp, 0); 640 } 641 642 ip->i_mnt = fcmp; 643 ip->i_devvp = fcmp->fc_devvp; 644 ip->i_diroff = 0; 645 VREF(ip->i_devvp); 646 647 /* 648 * Setup type 649 */ 650 vp->v_type = VREG; 651 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 652 vp->v_type = VDIR; 653 654 /* 655 * Initialize the associated vnode 656 */ 657 switch (vp->v_type) { 658 case VFIFO: 659 case VCHR: 660 case VBLK: 661 /* 662 * Devices not supported. 663 */ 664 vput(vp); 665 return (EOPNOTSUPP); 666 case VLNK: 667 case VNON: 668 case VSOCK: 669 case VDIR: 670 case VBAD: 671 case VREG: 672 break; 673 } 674 675 if (ino == FILECORE_ROOTINO) 676 vp->v_vflag |= VV_ROOT; 677 678 /* 679 * XXX need generation number? 680 */ 681 682 uvm_vnp_setsize(vp, ip->i_size); 683 *vpp = vp; 684 return (0); 685 } 686 687 /* 688 * Vnode pointer to File handle 689 */ 690 /* ARGSUSED */ 691 int 692 filecore_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 693 { 694 struct filecore_node *ip = VTOI(vp); 695 struct ifid ifh; 696 697 if (*fh_size < sizeof(struct ifid)) { 698 *fh_size = sizeof(struct ifid); 699 return E2BIG; 700 } 701 memset(&ifh, 0, sizeof(ifh)); 702 ifh.ifid_len = sizeof(struct ifid); 703 ifh.ifid_ino = ip->i_number; 704 memcpy(fhp, &ifh, sizeof(ifh)); 705 return 0; 706 } 707
Indexes created Wed Oct 01 12:09:54 GMT 2025