filecore_vfsops.c revision 1.32
1 /* $NetBSD: filecore_vfsops.c,v 1.32 2007/03/04 21:18:08 jnemeth 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 1.32 2007/03/04 21:18:08 jnemeth 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_DEFINE(M_FILECOREMNT, "filecore mount", "Filecore FS mount structures"); 98 99 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 100 101 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 102 &filecore_vnodeop_opv_desc, 103 NULL, 104 }; 105 106 struct vfsops filecore_vfsops = { 107 MOUNT_FILECORE, 108 filecore_mount, 109 filecore_start, 110 filecore_unmount, 111 filecore_root, 112 filecore_quotactl, 113 filecore_statvfs, 114 filecore_sync, 115 filecore_vget, 116 filecore_fhtovp, 117 filecore_vptofh, 118 filecore_init, 119 filecore_reinit, 120 filecore_done, 121 NULL, /* filecore_mountroot */ 122 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 123 vfs_stdextattrctl, 124 vfs_stdsuspendctl, 125 filecore_vnodeopv_descs, 126 0, 127 { NULL, NULL } 128 }; 129 VFS_ATTACH(filecore_vfsops); 130 131 static const struct genfs_ops filecore_genfsops = { 132 .gop_size = genfs_size, 133 }; 134 135 /* 136 * Called by vfs_mountroot when iso is going to be mounted as root. 137 * 138 * Name is updated by mount(8) after booting. 139 */ 140 141 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 142 struct lwp *l, struct filecore_args *argp)); 143 144 #if 0 145 int 146 filecore_mountroot() 147 { 148 struct mount *mp; 149 extern struct vnode *rootvp; 150 struct proc *p = curproc; /* XXX */ 151 int error; 152 struct filecore_args args; 153 154 if (device_class(root_device) != DV_DISK) 155 return (ENODEV); 156 157 /* 158 * Get vnodes for swapdev and rootdev. 159 */ 160 if (bdevvp(rootdev, &rootvp)) 161 panic("filecore_mountroot: can't setup rootvp"); 162 163 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 164 return (error); 165 166 args.flags = FILECOREMNT_ROOT; 167 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 168 mp->mnt_op->vfs_refcount--; 169 vfs_unbusy(mp); 170 free(mp, M_MOUNT); 171 return (error); 172 } 173 simple_lock(&mountlist_slock); 174 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 175 simple_unlock(&mountlist_slock); 176 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 177 vfs_unbusy(mp); 178 return (0); 179 } 180 #endif 181 182 /* 183 * VFS Operations. 184 * 185 * mount system call 186 */ 187 int 188 filecore_mount(mp, path, data, ndp, l) 189 struct mount *mp; 190 const char *path; 191 void *data; 192 struct nameidata *ndp; 193 struct lwp *l; 194 { 195 struct vnode *devvp; 196 struct filecore_args args; 197 int error; 198 struct filecore_mnt *fcmp = NULL; 199 200 if (mp->mnt_flag & MNT_GETARGS) { 201 fcmp = VFSTOFILECORE(mp); 202 if (fcmp == NULL) 203 return EIO; 204 args.flags = fcmp->fc_mntflags; 205 args.uid = fcmp->fc_uid; 206 args.gid = fcmp->fc_gid; 207 args.fspec = NULL; 208 return copyout(&args, data, sizeof(args)); 209 } 210 error = copyin(data, &args, sizeof (struct filecore_args)); 211 if (error) 212 return (error); 213 214 if ((mp->mnt_flag & MNT_RDONLY) == 0) 215 return (EROFS); 216 217 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 218 return EINVAL; 219 220 /* 221 * Not an update, or updating the name: look up the name 222 * and verify that it refers to a sensible block device. 223 */ 224 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 225 if ((error = namei(ndp)) != 0) 226 return (error); 227 devvp = ndp->ni_vp; 228 229 if (devvp->v_type != VBLK) { 230 vrele(devvp); 231 return ENOTBLK; 232 } 233 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 234 vrele(devvp); 235 return ENXIO; 236 } 237 /* 238 * If mount by non-root, then verify that user has necessary 239 * permissions on the device. 240 */ 241 if (kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 242 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 243 error = VOP_ACCESS(devvp, VREAD, l->l_cred, l); 244 VOP_UNLOCK(devvp, 0); 245 if (error) { 246 vrele(devvp); 247 return (error); 248 } 249 } 250 if ((mp->mnt_flag & MNT_UPDATE) == 0) 251 error = filecore_mountfs(devvp, mp, l, &args); 252 else { 253 if (devvp != fcmp->fc_devvp) 254 error = EINVAL; /* needs translation */ 255 else 256 vrele(devvp); 257 } 258 if (error) { 259 vrele(devvp); 260 return error; 261 } 262 fcmp = VFSTOFILECORE(mp); 263 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 264 mp, l); 265 } 266 267 /* 268 * Common code for mount and mountroot 269 */ 270 static int 271 filecore_mountfs(devvp, mp, l, argp) 272 struct vnode *devvp; 273 struct mount *mp; 274 struct lwp *l; 275 struct filecore_args *argp; 276 { 277 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 278 struct buf *bp = NULL; 279 dev_t dev = devvp->v_rdev; 280 int error = EINVAL; 281 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 282 extern struct vnode *rootvp; 283 struct filecore_disc_record *fcdr; 284 unsigned map; 285 unsigned log2secsize; 286 287 if (!ronly) 288 return EROFS; 289 290 /* 291 * Disallow multiple mounts of the same device. 292 * Disallow mounting of a device that is currently in use 293 * (except for root, which might share swap device for miniroot). 294 * Flush out any old buffers remaining from a previous use. 295 */ 296 if ((error = vfs_mountedon(devvp)) != 0) 297 return error; 298 if (vcount(devvp) > 1 && devvp != rootvp) 299 return EBUSY; 300 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) 301 != 0) 302 return (error); 303 304 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 305 if (error) 306 return error; 307 308 /* Read the filecore boot block to check FS validity and to find the map */ 309 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 310 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 311 #ifdef FILECORE_DEBUG_BR 312 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 313 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 314 bp, error); 315 #endif 316 if (error != 0) 317 goto out; 318 319 KASSERT(bp != NULL); 320 if (filecore_bbchecksum(bp->b_data) != 0) { 321 error = EINVAL; 322 goto out; 323 } 324 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 325 FILECORE_BB_DISCREC); 326 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 327 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 328 << fcdr->log2bpmb) >> fcdr->log2secsize; 329 log2secsize = fcdr->log2secsize; 330 bp->b_flags |= B_AGE; 331 #ifdef FILECORE_DEBUG_BR 332 printf("brelse(%p) vf1\n", bp); 333 #endif 334 brelse(bp); 335 bp = NULL; 336 337 /* Read the bootblock in the map */ 338 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 339 #ifdef FILECORE_DEBUG_BR 340 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 341 map, 1 << log2secsize, bp, error); 342 #endif 343 if (error != 0) 344 goto out; 345 fcdr = (struct filecore_disc_record *)((char *)(bp->b_data) + 4); 346 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 347 memset(fcmp, 0, sizeof *fcmp); 348 if (fcdr->log2bpmb > fcdr->log2secsize) 349 fcmp->log2bsize = fcdr->log2bpmb; 350 else fcmp->log2bsize = fcdr->log2secsize; 351 fcmp->blksize = 1 << fcmp->log2bsize; 352 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 353 fcmp->map = map; 354 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 355 / (fcdr->idlen + 1); 356 fcmp->mask = (1 << fcdr->idlen) - 1; 357 if (fcdr->big_flag & 1) { 358 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 359 + fcdr->disc_size) / fcmp->blksize; 360 } else { 361 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 362 } 363 364 bp->b_flags |= B_AGE; 365 #ifdef FILECORE_DEBUG_BR 366 printf("brelse(%p) vf2\n", bp); 367 #endif 368 brelse(bp); 369 bp = NULL; 370 371 mp->mnt_data = fcmp; 372 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 373 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 374 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 375 mp->mnt_stat.f_namemax = 10; 376 mp->mnt_flag |= MNT_LOCAL; 377 mp->mnt_dev_bshift = fcdr->log2secsize; 378 mp->mnt_fs_bshift = fcmp->log2bsize; 379 380 fcmp->fc_mountp = mp; 381 fcmp->fc_dev = dev; 382 fcmp->fc_devvp = devvp; 383 fcmp->fc_mntflags = argp->flags; 384 if (argp->flags & FILECOREMNT_USEUID) { 385 fcmp->fc_uid = kauth_cred_getuid(l->l_cred); 386 fcmp->fc_gid = kauth_cred_getgid(l->l_cred); 387 } else { 388 fcmp->fc_uid = argp->uid; 389 fcmp->fc_gid = argp->gid; 390 } 391 392 return 0; 393 out: 394 if (bp) { 395 #ifdef FILECORE_DEBUG_BR 396 printf("brelse(%p) vf3\n", bp); 397 #endif 398 brelse(bp); 399 } 400 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 401 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 402 VOP_UNLOCK(devvp, 0); 403 if (fcmp) { 404 free(fcmp, M_FILECOREMNT); 405 mp->mnt_data = NULL; 406 } 407 return error; 408 } 409 410 /* 411 * Make a filesystem operational. 412 * Nothing to do at the moment. 413 */ 414 /* ARGSUSED */ 415 int 416 filecore_start(mp, flags, l) 417 struct mount *mp; 418 int flags; 419 struct lwp *l; 420 { 421 return 0; 422 } 423 424 /* 425 * unmount system call 426 */ 427 int 428 filecore_unmount(mp, mntflags, l) 429 struct mount *mp; 430 int mntflags; 431 struct lwp *l; 432 { 433 struct filecore_mnt *fcmp; 434 int error, flags = 0; 435 436 if (mntflags & MNT_FORCE) 437 flags |= FORCECLOSE; 438 #if 0 439 mntflushbuf(mp, 0); 440 if (mntinvalbuf(mp)) 441 return EBUSY; 442 #endif 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, l); 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 * Do operations associated with quotas, not supported 478 */ 479 /* ARGSUSED */ 480 int 481 filecore_quotactl(mp, cmd, uid, arg, l) 482 struct mount *mp; 483 int cmd; 484 uid_t uid; 485 void *arg; 486 struct lwp *l; 487 { 488 489 return (EOPNOTSUPP); 490 } 491 492 /* 493 * Get file system statistics. 494 */ 495 int 496 filecore_statvfs(mp, sbp, l) 497 struct mount *mp; 498 struct statvfs *sbp; 499 struct lwp *l; 500 { 501 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 502 503 sbp->f_bsize = fcmp->blksize; 504 sbp->f_frsize = sbp->f_bsize; /* XXX */ 505 sbp->f_iosize = sbp->f_bsize; /* XXX */ 506 sbp->f_blocks = fcmp->nblks; 507 sbp->f_bfree = 0; /* total free blocks */ 508 sbp->f_bavail = 0; /* blocks free for non superuser */ 509 sbp->f_bresvd = 0; /* reserved blocks */ 510 sbp->f_files = 0; /* total files */ 511 sbp->f_ffree = 0; /* free file nodes for non superuser */ 512 sbp->f_favail = 0; /* free file nodes */ 513 sbp->f_fresvd = 0; /* reserved file nodes */ 514 copy_statvfs_info(sbp, mp); 515 return 0; 516 } 517 518 /* ARGSUSED */ 519 int 520 filecore_sync(mp, waitfor, cred, l) 521 struct mount *mp; 522 int waitfor; 523 kauth_cred_t cred; 524 struct lwp *l; 525 { 526 return (0); 527 } 528 529 /* 530 * File handle to vnode 531 * 532 * Have to be really careful about stale file handles: 533 * - check that the inode number is in range 534 * - call iget() to get the locked inode 535 * - check for an unallocated inode (i_mode == 0) 536 * - check that the generation number matches 537 */ 538 539 struct ifid { 540 ushort ifid_len; 541 ushort ifid_pad; 542 u_int32_t ifid_ino; 543 }; 544 545 /* ARGSUSED */ 546 int 547 filecore_fhtovp(mp, fhp, vpp) 548 struct mount *mp; 549 struct fid *fhp; 550 struct vnode **vpp; 551 { 552 struct ifid ifh; 553 struct vnode *nvp; 554 struct filecore_node *ip; 555 int error; 556 557 if (fhp->fid_len != sizeof(struct ifid)) 558 return EINVAL; 559 560 memcpy(&ifh, fhp, sizeof(ifh)); 561 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { 562 *vpp = NULLVP; 563 return (error); 564 } 565 ip = VTOI(nvp); 566 if (filecore_staleinode(ip)) { 567 vput(nvp); 568 *vpp = NULLVP; 569 return (ESTALE); 570 } 571 *vpp = nvp; 572 return (0); 573 } 574 575 /* This looks complicated. Look at other vgets as well as the iso9660 one. 576 * 577 * The filecore inode number is made up of 1 byte directory entry index and 578 * 3 bytes of the internal disc address of the directory. On a read-only 579 * filesystem this is unique. For a read-write version we may not be able to 580 * do vget, see msdosfs. 581 */ 582 583 int 584 filecore_vget(mp, ino, vpp) 585 struct mount *mp; 586 ino_t ino; 587 struct vnode **vpp; 588 { 589 struct filecore_mnt *fcmp; 590 struct filecore_node *ip; 591 struct buf *bp; 592 struct vnode *vp; 593 dev_t dev; 594 int error; 595 596 fcmp = VFSTOFILECORE(mp); 597 dev = fcmp->fc_dev; 598 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 599 return (0); 600 601 /* Allocate a new vnode/filecore_node. */ 602 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 603 != 0) { 604 *vpp = NULLVP; 605 return (error); 606 } 607 ip = pool_get(&filecore_node_pool, PR_WAITOK); 608 memset(ip, 0, sizeof(struct filecore_node)); 609 vp->v_data = ip; 610 ip->i_vnode = vp; 611 ip->i_dev = dev; 612 ip->i_number = ino; 613 ip->i_block = -1; 614 ip->i_parent = -2; 615 616 /* 617 * Put it onto its hash chain and lock it so that other requests for 618 * this inode will block if they arrive while we are sleeping waiting 619 * for old data structures to be purged or for the contents of the 620 * disk portion of this inode to be read. 621 */ 622 filecore_ihashins(ip); 623 624 if (ino == FILECORE_ROOTINO) { 625 /* Here we need to construct a root directory inode */ 626 memcpy(ip->i_dirent.name, "root", 4); 627 ip->i_dirent.load = 0; 628 ip->i_dirent.exec = 0; 629 ip->i_dirent.len = FILECORE_DIR_SIZE; 630 ip->i_dirent.addr = fcmp->drec.root; 631 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 632 633 } else { 634 /* Read in Data from Directory Entry */ 635 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 636 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 637 vput(vp); 638 #ifdef FILECORE_DEBUG_BR 639 printf("brelse(%p) vf4\n", bp); 640 #endif 641 brelse(bp); 642 *vpp = NULL; 643 return (error); 644 } 645 646 memcpy(&ip->i_dirent, 647 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 648 sizeof(struct filecore_direntry)); 649 #ifdef FILECORE_DEBUG_BR 650 printf("brelse(%p) vf5\n", bp); 651 #endif 652 brelse(bp); 653 } 654 655 ip->i_mnt = fcmp; 656 ip->i_devvp = fcmp->fc_devvp; 657 ip->i_diroff = 0; 658 VREF(ip->i_devvp); 659 660 /* 661 * Setup type 662 */ 663 vp->v_type = VREG; 664 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 665 vp->v_type = VDIR; 666 667 /* 668 * Initialize the associated vnode 669 */ 670 switch (vp->v_type) { 671 case VFIFO: 672 case VCHR: 673 case VBLK: 674 /* 675 * Devices not supported. 676 */ 677 vput(vp); 678 return (EOPNOTSUPP); 679 case VLNK: 680 case VNON: 681 case VSOCK: 682 case VDIR: 683 case VBAD: 684 case VREG: 685 break; 686 } 687 688 if (ino == FILECORE_ROOTINO) 689 vp->v_flag |= VROOT; 690 691 /* 692 * XXX need generation number? 693 */ 694 695 genfs_node_init(vp, &filecore_genfsops); 696 vp->v_size = ip->i_size; 697 *vpp = vp; 698 return (0); 699 } 700 701 /* 702 * Vnode pointer to File handle 703 */ 704 /* ARGSUSED */ 705 int 706 filecore_vptofh(vp, fhp, fh_size) 707 struct vnode *vp; 708 struct fid *fhp; 709 size_t *fh_size; 710 { 711 struct filecore_node *ip = VTOI(vp); 712 struct ifid ifh; 713 714 if (*fh_size < sizeof(struct ifid)) { 715 *fh_size = sizeof(struct ifid); 716 return E2BIG; 717 } 718 memset(&ifh, 0, sizeof(ifh)); 719 ifh.ifid_len = sizeof(struct ifid); 720 ifh.ifid_ino = ip->i_number; 721 memcpy(fhp, &ifh, sizeof(ifh)); 722 return 0; 723 } 724 725 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 726 { 727 728 sysctl_createv(clog, 0, NULL, NULL, 729 CTLFLAG_PERMANENT, 730 CTLTYPE_NODE, "vfs", NULL, 731 NULL, 0, NULL, 0, 732 CTL_VFS, CTL_EOL); 733 sysctl_createv(clog, 0, NULL, NULL, 734 CTLFLAG_PERMANENT, 735 CTLTYPE_NODE, "filecore", 736 SYSCTL_DESCR("Acorn FILECORE file system"), 737 NULL, 0, NULL, 0, 738 CTL_VFS, 19, CTL_EOL); 739 /* 740 * XXX the "19" above could be dynamic, thereby eliminating 741 * one more instance of the "number to vfs" mapping problem, 742 * but "19" is the order as taken from sys/mount.h 743 */ 744 } 745
Indexes created Wed Oct 01 12:09:54 GMT 2025