filecore_vfsops.c revision 1.41
1 /* $NetBSD: filecore_vfsops.c,v 1.41 2007/09/24 00:42:13 rumble 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 1.41 2007/09/24 00:42:13 rumble 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 MALLOC_JUSTDEFINE(M_FILECORETMP, 100 "filecore temp", "Filecore FS temporary structures"); 101 102 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 103 104 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 105 &filecore_vnodeop_opv_desc, 106 NULL, 107 }; 108 109 struct vfsops filecore_vfsops = { 110 MOUNT_FILECORE, 111 sizeof (struct filecore_args), 112 filecore_mount, 113 filecore_start, 114 filecore_unmount, 115 filecore_root, 116 filecore_quotactl, 117 filecore_statvfs, 118 filecore_sync, 119 filecore_vget, 120 filecore_fhtovp, 121 filecore_vptofh, 122 filecore_init, 123 filecore_reinit, 124 filecore_done, 125 NULL, /* filecore_mountroot */ 126 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 127 vfs_stdextattrctl, 128 (void *)eopnotsupp, /* vfs_suspendctl */ 129 filecore_vnodeopv_descs, 130 0, 131 { NULL, NULL } 132 }; 133 VFS_ATTACH(filecore_vfsops); 134 135 static const struct genfs_ops filecore_genfsops = { 136 .gop_size = genfs_size, 137 }; 138 139 /* 140 * Called by vfs_mountroot when iso is going to be mounted as root. 141 * 142 * Name is updated by mount(8) after booting. 143 */ 144 145 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 146 struct lwp *l, struct filecore_args *argp)); 147 148 #if 0 149 int 150 filecore_mountroot() 151 { 152 struct mount *mp; 153 extern struct vnode *rootvp; 154 struct proc *p = curproc; /* XXX */ 155 int error; 156 struct filecore_args args; 157 158 if (device_class(root_device) != DV_DISK) 159 return (ENODEV); 160 161 /* 162 * Get vnodes for swapdev and rootdev. 163 */ 164 if (bdevvp(rootdev, &rootvp)) 165 panic("filecore_mountroot: can't setup rootvp"); 166 167 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 168 return (error); 169 170 args.flags = FILECOREMNT_ROOT; 171 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 172 mp->mnt_op->vfs_refcount--; 173 vfs_unbusy(mp); 174 free(mp, M_MOUNT); 175 return (error); 176 } 177 simple_lock(&mountlist_slock); 178 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 179 simple_unlock(&mountlist_slock); 180 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 181 vfs_unbusy(mp); 182 return (0); 183 } 184 #endif 185 186 /* 187 * VFS Operations. 188 * 189 * mount system call 190 */ 191 int 192 filecore_mount(mp, path, data, data_len, l) 193 struct mount *mp; 194 const char *path; 195 void *data; 196 size_t *data_len; 197 struct lwp *l; 198 { 199 struct nameidata nd; 200 struct vnode *devvp; 201 struct filecore_args *args = data; 202 int error; 203 struct filecore_mnt *fcmp = NULL; 204 205 if (*data_len < sizeof *args) 206 return EINVAL; 207 208 if (mp->mnt_flag & MNT_GETARGS) { 209 fcmp = VFSTOFILECORE(mp); 210 if (fcmp == NULL) 211 return EIO; 212 args->flags = fcmp->fc_mntflags; 213 args->uid = fcmp->fc_uid; 214 args->gid = fcmp->fc_gid; 215 args->fspec = NULL; 216 *data_len = sizeof *args; 217 return 0; 218 } 219 220 if ((mp->mnt_flag & MNT_RDONLY) == 0) 221 return (EROFS); 222 223 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) 224 return EINVAL; 225 226 /* 227 * Not an update, or updating the name: look up the name 228 * and verify that it refers to a sensible block device. 229 */ 230 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l); 231 if ((error = namei(&nd)) != 0) 232 return (error); 233 devvp = nd.ni_vp; 234 235 if (devvp->v_type != VBLK) { 236 vrele(devvp); 237 return ENOTBLK; 238 } 239 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 240 vrele(devvp); 241 return ENXIO; 242 } 243 /* 244 * If mount by non-root, then verify that user has necessary 245 * permissions on the device. 246 */ 247 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 248 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 249 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 250 VOP_UNLOCK(devvp, 0); 251 if (error) { 252 vrele(devvp); 253 return (error); 254 } 255 } 256 if ((mp->mnt_flag & MNT_UPDATE) == 0) 257 error = filecore_mountfs(devvp, mp, l, args); 258 else { 259 if (devvp != fcmp->fc_devvp) 260 error = EINVAL; /* needs translation */ 261 else 262 vrele(devvp); 263 } 264 if (error) { 265 vrele(devvp); 266 return error; 267 } 268 fcmp = VFSTOFILECORE(mp); 269 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 270 mp->mnt_op->vfs_name, mp, l); 271 } 272 273 /* 274 * Common code for mount and mountroot 275 */ 276 static int 277 filecore_mountfs(devvp, mp, l, argp) 278 struct vnode *devvp; 279 struct mount *mp; 280 struct lwp *l; 281 struct filecore_args *argp; 282 { 283 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 284 struct buf *bp = NULL; 285 dev_t dev = devvp->v_rdev; 286 int error = EINVAL; 287 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 288 extern struct vnode *rootvp; 289 struct filecore_disc_record *fcdr; 290 unsigned map; 291 unsigned log2secsize; 292 293 if (!ronly) 294 return EROFS; 295 296 /* 297 * Disallow multiple mounts of the same device. 298 * Disallow mounting of a device that is currently in use 299 * (except for root, which might share swap device for miniroot). 300 * Flush out any old buffers remaining from a previous use. 301 */ 302 if ((error = vfs_mountedon(devvp)) != 0) 303 return error; 304 if (vcount(devvp) > 1 && devvp != rootvp) 305 return EBUSY; 306 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 307 != 0) 308 return (error); 309 310 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 311 if (error) 312 return error; 313 314 /* Read the filecore boot block to check FS validity and to find the map */ 315 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 316 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 317 #ifdef FILECORE_DEBUG_BR 318 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 319 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 320 bp, error); 321 #endif 322 if (error != 0) 323 goto out; 324 325 KASSERT(bp != NULL); 326 if (filecore_bbchecksum(bp->b_data) != 0) { 327 error = EINVAL; 328 goto out; 329 } 330 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 331 FILECORE_BB_DISCREC); 332 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 333 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 334 << fcdr->log2bpmb) >> fcdr->log2secsize; 335 log2secsize = fcdr->log2secsize; 336 bp->b_flags |= B_AGE; 337 #ifdef FILECORE_DEBUG_BR 338 printf("brelse(%p) vf1\n", bp); 339 #endif 340 brelse(bp); 341 bp = NULL; 342 343 /* Read the bootblock in the map */ 344 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 345 #ifdef FILECORE_DEBUG_BR 346 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 347 map, 1 << log2secsize, bp, error); 348 #endif 349 if (error != 0) 350 goto out; 351 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 352 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 353 memset(fcmp, 0, sizeof *fcmp); 354 if (fcdr->log2bpmb > fcdr->log2secsize) 355 fcmp->log2bsize = fcdr->log2bpmb; 356 else fcmp->log2bsize = fcdr->log2secsize; 357 fcmp->blksize = 1 << fcmp->log2bsize; 358 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 359 fcmp->map = map; 360 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 361 / (fcdr->idlen + 1); 362 fcmp->mask = (1 << fcdr->idlen) - 1; 363 if (fcdr->big_flag & 1) { 364 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 365 + fcdr->disc_size) / fcmp->blksize; 366 } else { 367 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 368 } 369 370 bp->b_flags |= B_AGE; 371 #ifdef FILECORE_DEBUG_BR 372 printf("brelse(%p) vf2\n", bp); 373 #endif 374 brelse(bp); 375 bp = NULL; 376 377 mp->mnt_data = fcmp; 378 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 379 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 380 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 381 mp->mnt_stat.f_namemax = 10; 382 mp->mnt_flag |= MNT_LOCAL; 383 mp->mnt_dev_bshift = fcdr->log2secsize; 384 mp->mnt_fs_bshift = fcmp->log2bsize; 385 386 fcmp->fc_mountp = mp; 387 fcmp->fc_dev = dev; 388 fcmp->fc_devvp = devvp; 389 fcmp->fc_mntflags = argp->flags; 390 if (argp->flags & FILECOREMNT_USEUID) { 391 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 392 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 393 } else { 394 fcmp->fc_uid = argp->uid; 395 fcmp->fc_gid = argp->gid; 396 } 397 398 return 0; 399 out: 400 if (bp) { 401 #ifdef FILECORE_DEBUG_BR 402 printf("brelse(%p) vf3\n", bp); 403 #endif 404 brelse(bp); 405 } 406 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 407 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 408 VOP_UNLOCK(devvp, 0); 409 return error; 410 } 411 412 /* 413 * Make a filesystem operational. 414 * Nothing to do at the moment. 415 */ 416 /* ARGSUSED */ 417 int 418 filecore_start(mp, flags, l) 419 struct mount *mp; 420 int flags; 421 struct lwp *l; 422 { 423 return 0; 424 } 425 426 /* 427 * unmount system call 428 */ 429 int 430 filecore_unmount(mp, mntflags, l) 431 struct mount *mp; 432 int mntflags; 433 struct lwp *l; 434 { 435 struct filecore_mnt *fcmp; 436 int error, flags = 0; 437 438 if (mntflags & MNT_FORCE) 439 flags |= FORCECLOSE; 440 if ((error = vflush(mp, NULLVP, flags)) != 0) 441 return (error); 442 443 fcmp = VFSTOFILECORE(mp); 444 445 if (fcmp->fc_devvp->v_type != VBAD) 446 fcmp->fc_devvp->v_specmountpoint = NULL; 447 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 448 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 449 vput(fcmp->fc_devvp); 450 free(fcmp, M_FILECOREMNT); 451 mp->mnt_data = NULL; 452 mp->mnt_flag &= ~MNT_LOCAL; 453 return (error); 454 } 455 456 /* 457 * Return root of a filesystem 458 */ 459 int 460 filecore_root(mp, vpp) 461 struct mount *mp; 462 struct vnode **vpp; 463 { 464 struct vnode *nvp; 465 int error; 466 467 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 468 return (error); 469 *vpp = nvp; 470 return (0); 471 } 472 473 /* 474 * Do operations associated with quotas, not supported 475 */ 476 /* ARGSUSED */ 477 int 478 filecore_quotactl(mp, cmd, uid, arg, l) 479 struct mount *mp; 480 int cmd; 481 uid_t uid; 482 void *arg; 483 struct lwp *l; 484 { 485 486 return (EOPNOTSUPP); 487 } 488 489 /* 490 * Get file system statistics. 491 */ 492 int 493 filecore_statvfs(mp, sbp, l) 494 struct mount *mp; 495 struct statvfs *sbp; 496 struct lwp *l; 497 { 498 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 499 500 sbp->f_bsize = fcmp->blksize; 501 sbp->f_frsize = sbp->f_bsize; /* XXX */ 502 sbp->f_iosize = sbp->f_bsize; /* XXX */ 503 sbp->f_blocks = fcmp->nblks; 504 sbp->f_bfree = 0; /* total free blocks */ 505 sbp->f_bavail = 0; /* blocks free for non superuser */ 506 sbp->f_bresvd = 0; /* reserved blocks */ 507 sbp->f_files = 0; /* total files */ 508 sbp->f_ffree = 0; /* free file nodes for non superuser */ 509 sbp->f_favail = 0; /* free file nodes */ 510 sbp->f_fresvd = 0; /* reserved file nodes */ 511 copy_statvfs_info(sbp, mp); 512 return 0; 513 } 514 515 /* ARGSUSED */ 516 int 517 filecore_sync(mp, waitfor, cred, l) 518 struct mount *mp; 519 int waitfor; 520 kauth_cred_t cred; 521 struct lwp *l; 522 { 523 return (0); 524 } 525 526 /* 527 * File handle to vnode 528 * 529 * Have to be really careful about stale file handles: 530 * - check that the inode number is in range 531 * - call iget() to get the locked inode 532 * - check for an unallocated inode (i_mode == 0) 533 * - check that the generation number matches 534 */ 535 536 struct ifid { 537 ushort ifid_len; 538 ushort ifid_pad; 539 u_int32_t ifid_ino; 540 }; 541 542 /* ARGSUSED */ 543 int 544 filecore_fhtovp(mp, fhp, vpp) 545 struct mount *mp; 546 struct fid *fhp; 547 struct vnode **vpp; 548 { 549 struct ifid ifh; 550 struct vnode *nvp; 551 struct filecore_node *ip; 552 int error; 553 554 if (fhp->fid_len != sizeof(struct ifid)) 555 return EINVAL; 556 557 memcpy(&ifh, fhp, sizeof(ifh)); 558 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 559 *vpp = NULLVP; 560 return (error); 561 } 562 ip = VTOI(nvp); 563 if (filecore_staleinode(ip)) { 564 vput(nvp); 565 *vpp = NULLVP; 566 return (ESTALE); 567 } 568 *vpp = nvp; 569 return (0); 570 } 571 572 /* This looks complicated. Look at other vgets as well as the iso9660 one. 573 * 574 * The filecore inode number is made up of 1 byte directory entry index and 575 * 3 bytes of the internal disc address of the directory. On a read-only 576 * filesystem this is unique. For a read-write version we may not be able to 577 * do vget, see msdosfs. 578 */ 579 580 int 581 filecore_vget(mp, ino, vpp) 582 struct mount *mp; 583 ino_t ino; 584 struct vnode **vpp; 585 { 586 struct filecore_mnt *fcmp; 587 struct filecore_node *ip; 588 struct buf *bp; 589 struct vnode *vp; 590 dev_t dev; 591 int error; 592 593 fcmp = VFSTOFILECORE(mp); 594 dev = fcmp->fc_dev; 595 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 596 return (0); 597 598 /* Allocate a new vnode/filecore_node. */ 599 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 600 != 0) { 601 *vpp = NULLVP; 602 return (error); 603 } 604 ip = pool_get(&filecore_node_pool, PR_WAITOK); 605 memset(ip, 0, sizeof(struct filecore_node)); 606 vp->v_data = ip; 607 ip->i_vnode = vp; 608 ip->i_dev = dev; 609 ip->i_number = ino; 610 ip->i_block = -1; 611 ip->i_parent = -2; 612 613 /* 614 * Put it onto its hash chain and lock it so that other requests for 615 * this inode will block if they arrive while we are sleeping waiting 616 * for old data structures to be purged or for the contents of the 617 * disk portion of this inode to be read. 618 */ 619 filecore_ihashins(ip); 620 621 if (ino == FILECORE_ROOTINO) { 622 /* Here we need to construct a root directory inode */ 623 memcpy(ip->i_dirent.name, "root", 4); 624 ip->i_dirent.load = 0; 625 ip->i_dirent.exec = 0; 626 ip->i_dirent.len = FILECORE_DIR_SIZE; 627 ip->i_dirent.addr = fcmp->drec.root; 628 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 629 630 } else { 631 /* Read in Data from Directory Entry */ 632 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 633 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 634 vput(vp); 635 #ifdef FILECORE_DEBUG_BR 636 printf("brelse(%p) vf4\n", bp); 637 #endif 638 brelse(bp); 639 *vpp = NULL; 640 return (error); 641 } 642 643 memcpy(&ip->i_dirent, 644 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 645 sizeof(struct filecore_direntry)); 646 #ifdef FILECORE_DEBUG_BR 647 printf("brelse(%p) vf5\n", bp); 648 #endif 649 brelse(bp); 650 } 651 652 ip->i_mnt = fcmp; 653 ip->i_devvp = fcmp->fc_devvp; 654 ip->i_diroff = 0; 655 VREF(ip->i_devvp); 656 657 /* 658 * Setup type 659 */ 660 vp->v_type = VREG; 661 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 662 vp->v_type = VDIR; 663 664 /* 665 * Initialize the associated vnode 666 */ 667 switch (vp->v_type) { 668 case VFIFO: 669 case VCHR: 670 case VBLK: 671 /* 672 * Devices not supported. 673 */ 674 vput(vp); 675 return (EOPNOTSUPP); 676 case VLNK: 677 case VNON: 678 case VSOCK: 679 case VDIR: 680 case VBAD: 681 case VREG: 682 break; 683 } 684 685 if (ino == FILECORE_ROOTINO) 686 vp->v_flag |= VROOT; 687 688 /* 689 * XXX need generation number? 690 */ 691 692 genfs_node_init(vp, &filecore_genfsops); 693 uvm_vnp_setsize(vp, ip->i_size); 694 *vpp = vp; 695 return (0); 696 } 697 698 /* 699 * Vnode pointer to File handle 700 */ 701 /* ARGSUSED */ 702 int 703 filecore_vptofh(vp, fhp, fh_size) 704 struct vnode *vp; 705 struct fid *fhp; 706 size_t *fh_size; 707 { 708 struct filecore_node *ip = VTOI(vp); 709 struct ifid ifh; 710 711 if (*fh_size < sizeof(struct ifid)) { 712 *fh_size = sizeof(struct ifid); 713 return E2BIG; 714 } 715 memset(&ifh, 0, sizeof(ifh)); 716 ifh.ifid_len = sizeof(struct ifid); 717 ifh.ifid_ino = ip->i_number; 718 memcpy(fhp, &ifh, sizeof(ifh)); 719 return 0; 720 } 721 722 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 723 { 724 725 sysctl_createv(clog, 0, NULL, NULL, 726 CTLFLAG_PERMANENT, 727 CTLTYPE_NODE, "vfs", NULL, 728 NULL, 0, NULL, 0, 729 CTL_VFS, CTL_EOL); 730 sysctl_createv(clog, 0, NULL, NULL, 731 CTLFLAG_PERMANENT, 732 CTLTYPE_NODE, "filecore", 733 SYSCTL_DESCR("Acorn FILECORE file system"), 734 NULL, 0, NULL, 0, 735 CTL_VFS, 19, CTL_EOL); 736 /* 737 * XXX the "19" above could be dynamic, thereby eliminating 738 * one more instance of the "number to vfs" mapping problem, 739 * but "19" is the order as taken from sys/mount.h 740 */ 741 } 742
Indexes created Wed Oct 01 12:09:54 GMT 2025