filecore_vfsops.c revision 1.21
1 /* $NetBSD: filecore_vfsops.c,v 1.21 2005/09/23 12:10:32 jmmv 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 1.21 2005/09/23 12:10:32 jmmv 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 91 #include <fs/filecorefs/filecore.h> 92 #include <fs/filecorefs/filecore_extern.h> 93 #include <fs/filecorefs/filecore_node.h> 94 #include <fs/filecorefs/filecore_mount.h> 95 96 MALLOC_DEFINE(M_FILECOREMNT, "filecore mount", "Filecore FS mount structures"); 97 98 extern const struct vnodeopv_desc filecore_vnodeop_opv_desc; 99 100 const struct vnodeopv_desc * const filecore_vnodeopv_descs[] = { 101 &filecore_vnodeop_opv_desc, 102 NULL, 103 }; 104 105 struct vfsops filecore_vfsops = { 106 MOUNT_FILECORE, 107 filecore_mount, 108 filecore_start, 109 filecore_unmount, 110 filecore_root, 111 filecore_quotactl, 112 filecore_statvfs, 113 filecore_sync, 114 filecore_vget, 115 filecore_fhtovp, 116 filecore_vptofh, 117 filecore_init, 118 filecore_reinit, 119 filecore_done, 120 NULL, /* filecore_mountroot */ 121 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 122 vfs_stdextattrctl, 123 filecore_vnodeopv_descs, 124 }; 125 VFS_ATTACH(filecore_vfsops); 126 127 static const struct genfs_ops filecore_genfsops = { 128 .gop_size = genfs_size, 129 }; 130 131 /* 132 * Called by vfs_mountroot when iso is going to be mounted as root. 133 * 134 * Name is updated by mount(8) after booting. 135 */ 136 137 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 138 struct proc *p, struct filecore_args *argp)); 139 140 #if 0 141 int 142 filecore_mountroot() 143 { 144 struct mount *mp; 145 extern struct vnode *rootvp; 146 struct proc *p = curproc; /* XXX */ 147 int error; 148 struct filecore_args args; 149 150 if (root_device->dv_class != DV_DISK) 151 return (ENODEV); 152 153 /* 154 * Get vnodes for swapdev and rootdev. 155 */ 156 if (bdevvp(rootdev, &rootvp)) 157 panic("filecore_mountroot: can't setup rootvp"); 158 159 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 160 return (error); 161 162 args.flags = FILECOREMNT_ROOT; 163 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 164 mp->mnt_op->vfs_refcount--; 165 vfs_unbusy(mp); 166 free(mp, M_MOUNT); 167 return (error); 168 } 169 simple_lock(&mountlist_slock); 170 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 171 simple_unlock(&mountlist_slock); 172 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 173 vfs_unbusy(mp); 174 return (0); 175 } 176 #endif 177 178 /* 179 * VFS Operations. 180 * 181 * mount system call 182 */ 183 int 184 filecore_mount(mp, path, data, ndp, p) 185 struct mount *mp; 186 const char *path; 187 void *data; 188 struct nameidata *ndp; 189 struct proc *p; 190 { 191 struct vnode *devvp; 192 struct filecore_args args; 193 int error; 194 struct filecore_mnt *fcmp = NULL; 195 196 if (mp->mnt_flag & MNT_GETARGS) { 197 fcmp = VFSTOFILECORE(mp); 198 if (fcmp == NULL) 199 return EIO; 200 args.flags = fcmp->fc_mntflags; 201 args.uid = fcmp->fc_uid; 202 args.gid = fcmp->fc_gid; 203 args.fspec = NULL; 204 return copyout(&args, data, sizeof(args)); 205 } 206 error = copyin(data, &args, sizeof (struct filecore_args)); 207 if (error) 208 return (error); 209 210 if ((mp->mnt_flag & MNT_RDONLY) == 0) 211 return (EROFS); 212 213 if ((mp->mnt_flag & MNT_UPDATE) && args.fspec == NULL) 214 return EINVAL; 215 216 /* 217 * Not an update, or updating the name: look up the name 218 * and verify that it refers to a sensible block device. 219 */ 220 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 221 if ((error = namei(ndp)) != 0) 222 return (error); 223 devvp = ndp->ni_vp; 224 225 if (devvp->v_type != VBLK) { 226 vrele(devvp); 227 return ENOTBLK; 228 } 229 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 230 vrele(devvp); 231 return ENXIO; 232 } 233 /* 234 * If mount by non-root, then verify that user has necessary 235 * permissions on the device. 236 */ 237 if (p->p_ucred->cr_uid != 0) { 238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 239 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 240 VOP_UNLOCK(devvp, 0); 241 if (error) { 242 vrele(devvp); 243 return (error); 244 } 245 } 246 if ((mp->mnt_flag & MNT_UPDATE) == 0) 247 error = filecore_mountfs(devvp, mp, p, &args); 248 else { 249 if (devvp != fcmp->fc_devvp) 250 error = EINVAL; /* needs translation */ 251 else 252 vrele(devvp); 253 } 254 if (error) { 255 vrele(devvp); 256 return error; 257 } 258 fcmp = VFSTOFILECORE(mp); 259 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 260 mp, p); 261 } 262 263 /* 264 * Common code for mount and mountroot 265 */ 266 static int 267 filecore_mountfs(devvp, mp, p, argp) 268 struct vnode *devvp; 269 struct mount *mp; 270 struct proc *p; 271 struct filecore_args *argp; 272 { 273 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 274 struct buf *bp = NULL; 275 dev_t dev = devvp->v_rdev; 276 int error = EINVAL; 277 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 278 extern struct vnode *rootvp; 279 struct filecore_disc_record *fcdr; 280 unsigned map; 281 unsigned log2secsize; 282 283 if (!ronly) 284 return EROFS; 285 286 /* 287 * Disallow multiple mounts of the same device. 288 * Disallow mounting of a device that is currently in use 289 * (except for root, which might share swap device for miniroot). 290 * Flush out any old buffers remaining from a previous use. 291 */ 292 if ((error = vfs_mountedon(devvp)) != 0) 293 return error; 294 if (vcount(devvp) > 1 && devvp != rootvp) 295 return EBUSY; 296 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 297 return (error); 298 299 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 300 if (error) 301 return error; 302 303 /* Read the filecore boot block to check FS validity and to find the map */ 304 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 305 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 306 #ifdef FILECORE_DEBUG_BR 307 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 308 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 309 bp, error); 310 #endif 311 if (error != 0) 312 goto out; 313 if (filecore_bbchecksum(bp->b_data) != 0) { 314 error = EINVAL; 315 goto out; 316 } 317 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 318 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 319 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 320 << fcdr->log2bpmb) >> fcdr->log2secsize; 321 log2secsize = fcdr->log2secsize; 322 bp->b_flags |= B_AGE; 323 #ifdef FILECORE_DEBUG_BR 324 printf("brelse(%p) vf1\n", bp); 325 #endif 326 brelse(bp); 327 bp = NULL; 328 329 /* Read the bootblock in the map */ 330 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 331 #ifdef FILECORE_DEBUG_BR 332 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 333 map, 1 << log2secsize, bp, error); 334 #endif 335 if (error != 0) 336 goto out; 337 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 338 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 339 memset(fcmp, 0, sizeof *fcmp); 340 if (fcdr->log2bpmb > fcdr->log2secsize) 341 fcmp->log2bsize = fcdr->log2bpmb; 342 else fcmp->log2bsize = fcdr->log2secsize; 343 fcmp->blksize = 1 << fcmp->log2bsize; 344 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 345 fcmp->map = map; 346 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 347 / (fcdr->idlen + 1); 348 fcmp->mask = (1 << fcdr->idlen) - 1; 349 if (fcdr->big_flag & 1) { 350 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 351 + fcdr->disc_size) / fcmp->blksize; 352 } else { 353 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 354 } 355 356 bp->b_flags |= B_AGE; 357 #ifdef FILECORE_DEBUG_BR 358 printf("brelse(%p) vf2\n", bp); 359 #endif 360 brelse(bp); 361 bp = NULL; 362 363 mp->mnt_data = fcmp; 364 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 365 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 366 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 367 mp->mnt_stat.f_namemax = 10; 368 mp->mnt_flag |= MNT_LOCAL; 369 mp->mnt_dev_bshift = fcdr->log2secsize; 370 mp->mnt_fs_bshift = fcmp->log2bsize; 371 372 fcmp->fc_mountp = mp; 373 fcmp->fc_dev = dev; 374 fcmp->fc_devvp = devvp; 375 fcmp->fc_mntflags = argp->flags; 376 if (argp->flags & FILECOREMNT_USEUID) { 377 fcmp->fc_uid = p->p_cred->p_ruid; 378 fcmp->fc_gid = p->p_cred->p_rgid; 379 } else { 380 fcmp->fc_uid = argp->uid; 381 fcmp->fc_gid = argp->gid; 382 } 383 384 return 0; 385 out: 386 if (bp) { 387 #ifdef FILECORE_DEBUG_BR 388 printf("brelse(%p) vf3\n", bp); 389 #endif 390 brelse(bp); 391 } 392 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 393 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 394 VOP_UNLOCK(devvp, 0); 395 if (fcmp) { 396 free(fcmp, M_FILECOREMNT); 397 mp->mnt_data = NULL; 398 } 399 return error; 400 } 401 402 /* 403 * Make a filesystem operational. 404 * Nothing to do at the moment. 405 */ 406 /* ARGSUSED */ 407 int 408 filecore_start(mp, flags, p) 409 struct mount *mp; 410 int flags; 411 struct proc *p; 412 { 413 return 0; 414 } 415 416 /* 417 * unmount system call 418 */ 419 int 420 filecore_unmount(mp, mntflags, p) 421 struct mount *mp; 422 int mntflags; 423 struct proc *p; 424 { 425 struct filecore_mnt *fcmp; 426 int error, flags = 0; 427 428 if (mntflags & MNT_FORCE) 429 flags |= FORCECLOSE; 430 #if 0 431 mntflushbuf(mp, 0); 432 if (mntinvalbuf(mp)) 433 return EBUSY; 434 #endif 435 if ((error = vflush(mp, NULLVP, flags)) != 0) 436 return (error); 437 438 fcmp = VFSTOFILECORE(mp); 439 440 if (fcmp->fc_devvp->v_type != VBAD) 441 fcmp->fc_devvp->v_specmountpoint = NULL; 442 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 443 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, p); 444 vput(fcmp->fc_devvp); 445 free(fcmp, M_FILECOREMNT); 446 mp->mnt_data = NULL; 447 mp->mnt_flag &= ~MNT_LOCAL; 448 return (error); 449 } 450 451 /* 452 * Return root of a filesystem 453 */ 454 int 455 filecore_root(mp, vpp) 456 struct mount *mp; 457 struct vnode **vpp; 458 { 459 struct vnode *nvp; 460 int error; 461 462 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 463 return (error); 464 *vpp = nvp; 465 return (0); 466 } 467 468 /* 469 * Do operations associated with quotas, not supported 470 */ 471 /* ARGSUSED */ 472 int 473 filecore_quotactl(mp, cmd, uid, arg, p) 474 struct mount *mp; 475 int cmd; 476 uid_t uid; 477 void *arg; 478 struct proc *p; 479 { 480 481 return (EOPNOTSUPP); 482 } 483 484 /* 485 * Get file system statistics. 486 */ 487 int 488 filecore_statvfs(mp, sbp, p) 489 struct mount *mp; 490 struct statvfs *sbp; 491 struct proc *p; 492 { 493 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 494 495 sbp->f_bsize = fcmp->blksize; 496 sbp->f_frsize = sbp->f_bsize; /* XXX */ 497 sbp->f_iosize = sbp->f_bsize; /* XXX */ 498 sbp->f_blocks = fcmp->nblks; 499 sbp->f_bfree = 0; /* total free blocks */ 500 sbp->f_bavail = 0; /* blocks free for non superuser */ 501 sbp->f_bresvd = 0; /* reserved blocks */ 502 sbp->f_files = 0; /* total files */ 503 sbp->f_ffree = 0; /* free file nodes for non superuser */ 504 sbp->f_favail = 0; /* free file nodes */ 505 sbp->f_fresvd = 0; /* reserved file nodes */ 506 copy_statvfs_info(sbp, mp); 507 return 0; 508 } 509 510 /* ARGSUSED */ 511 int 512 filecore_sync(mp, waitfor, cred, p) 513 struct mount *mp; 514 int waitfor; 515 struct ucred *cred; 516 struct proc *p; 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(mp, fhp, vpp) 540 struct mount *mp; 541 struct fid *fhp; 542 struct vnode **vpp; 543 { 544 struct ifid *ifhp = (struct ifid *)fhp; 545 struct vnode *nvp; 546 struct filecore_node *ip; 547 int error; 548 549 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 550 *vpp = NULLVP; 551 return (error); 552 } 553 ip = VTOI(nvp); 554 if (filecore_staleinode(ip)) { 555 vput(nvp); 556 *vpp = NULLVP; 557 return (ESTALE); 558 } 559 *vpp = nvp; 560 return (0); 561 } 562 563 /* This looks complicated. Look at other vgets as well as the iso9660 one. 564 * 565 * The filecore inode number is made up of 1 byte directory entry index and 566 * 3 bytes of the internal disc address of the directory. On a read-only 567 * filesystem this is unique. For a read-write version we may not be able to 568 * do vget, see msdosfs. 569 */ 570 571 int 572 filecore_vget(mp, ino, vpp) 573 struct mount *mp; 574 ino_t ino; 575 struct vnode **vpp; 576 { 577 struct filecore_mnt *fcmp; 578 struct filecore_node *ip; 579 struct buf *bp; 580 struct vnode *vp; 581 dev_t dev; 582 int error; 583 584 fcmp = VFSTOFILECORE(mp); 585 dev = fcmp->fc_dev; 586 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 587 return (0); 588 589 /* Allocate a new vnode/filecore_node. */ 590 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 591 != 0) { 592 *vpp = NULLVP; 593 return (error); 594 } 595 ip = pool_get(&filecore_node_pool, PR_WAITOK); 596 memset(ip, 0, sizeof(struct filecore_node)); 597 vp->v_data = ip; 598 ip->i_vnode = vp; 599 ip->i_dev = dev; 600 ip->i_number = ino; 601 ip->i_block = -1; 602 ip->i_parent = -2; 603 604 /* 605 * Put it onto its hash chain and lock it so that other requests for 606 * this inode will block if they arrive while we are sleeping waiting 607 * for old data structures to be purged or for the contents of the 608 * disk portion of this inode to be read. 609 */ 610 filecore_ihashins(ip); 611 612 if (ino == FILECORE_ROOTINO) { 613 /* Here we need to construct a root directory inode */ 614 memcpy(ip->i_dirent.name, "root", 4); 615 ip->i_dirent.load = 0; 616 ip->i_dirent.exec = 0; 617 ip->i_dirent.len = FILECORE_DIR_SIZE; 618 ip->i_dirent.addr = fcmp->drec.root; 619 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 620 621 } else { 622 /* Read in Data from Directory Entry */ 623 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 624 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 625 vput(vp); 626 #ifdef FILECORE_DEBUG_BR 627 printf("brelse(%p) vf4\n", bp); 628 #endif 629 brelse(bp); 630 *vpp = NULL; 631 return (error); 632 } 633 634 memcpy(&ip->i_dirent, 635 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 636 sizeof(struct filecore_direntry)); 637 #ifdef FILECORE_DEBUG_BR 638 printf("brelse(%p) vf5\n", bp); 639 #endif 640 brelse(bp); 641 } 642 643 ip->i_mnt = fcmp; 644 ip->i_devvp = fcmp->fc_devvp; 645 ip->i_diroff = 0; 646 VREF(ip->i_devvp); 647 648 /* 649 * Setup type 650 */ 651 vp->v_type = VREG; 652 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 653 vp->v_type = VDIR; 654 655 /* 656 * Initialize the associated vnode 657 */ 658 switch (vp->v_type) { 659 case VFIFO: 660 case VCHR: 661 case VBLK: 662 /* 663 * Devices not supported. 664 */ 665 vput(vp); 666 return (EOPNOTSUPP); 667 case VLNK: 668 case VNON: 669 case VSOCK: 670 case VDIR: 671 case VBAD: 672 case VREG: 673 break; 674 } 675 676 if (ino == FILECORE_ROOTINO) 677 vp->v_flag |= VROOT; 678 679 /* 680 * XXX need generation number? 681 */ 682 683 genfs_node_init(vp, &filecore_genfsops); 684 vp->v_size = ip->i_size; 685 *vpp = vp; 686 return (0); 687 } 688 689 /* 690 * Vnode pointer to File handle 691 */ 692 /* ARGSUSED */ 693 int 694 filecore_vptofh(vp, fhp) 695 struct vnode *vp; 696 struct fid *fhp; 697 { 698 struct filecore_node *ip = VTOI(vp); 699 struct ifid *ifhp; 700 701 ifhp = (struct ifid *)fhp; 702 ifhp->ifid_len = sizeof(struct ifid); 703 ifhp->ifid_ino = ip->i_number; 704 return 0; 705 } 706 707 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 708 { 709 710 sysctl_createv(clog, 0, NULL, NULL, 711 CTLFLAG_PERMANENT, 712 CTLTYPE_NODE, "vfs", NULL, 713 NULL, 0, NULL, 0, 714 CTL_VFS, CTL_EOL); 715 sysctl_createv(clog, 0, NULL, NULL, 716 CTLFLAG_PERMANENT, 717 CTLTYPE_NODE, "filecore", 718 SYSCTL_DESCR("Acorn FILECORE file system"), 719 NULL, 0, NULL, 0, 720 CTL_VFS, 19, CTL_EOL); 721 /* 722 * XXX the "19" above could be dynamic, thereby eliminating 723 * one more instance of the "number to vfs" mapping problem, 724 * but "19" is the order as taken from sys/mount.h 725 */ 726 } 727
Indexes created Wed Oct 01 12:09:54 GMT 2025