filecore_vfsops.c revision 1.18.2.1
1 /* $NetBSD: filecore_vfsops.c,v 1.18.2.1 2005/08/24 18:43:37 riz 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 1.18.2.1 2005/08/24 18:43:37 riz 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, 121 NULL, /* filecore_mountroot */ 122 filecore_checkexp, 123 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 124 vfs_stdextattrctl, 125 filecore_vnodeopv_descs, 126 }; 127 128 static const struct genfs_ops filecore_genfsops = { 129 .gop_size = genfs_size, 130 }; 131 132 /* 133 * Called by vfs_mountroot when iso is going to be mounted as root. 134 * 135 * Name is updated by mount(8) after booting. 136 */ 137 138 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 139 struct proc *p, struct filecore_args *argp)); 140 141 #if 0 142 int 143 filecore_mountroot() 144 { 145 struct mount *mp; 146 extern struct vnode *rootvp; 147 struct proc *p = curproc; /* XXX */ 148 int error; 149 struct filecore_args args; 150 151 if (root_device->dv_class != DV_DISK) 152 return (ENODEV); 153 154 /* 155 * Get vnodes for swapdev and rootdev. 156 */ 157 if (bdevvp(rootdev, &rootvp)) 158 panic("filecore_mountroot: can't setup rootvp"); 159 160 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 161 return (error); 162 163 args.flags = FILECOREMNT_ROOT; 164 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 165 mp->mnt_op->vfs_refcount--; 166 vfs_unbusy(mp); 167 free(mp, M_MOUNT); 168 return (error); 169 } 170 simple_lock(&mountlist_slock); 171 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 172 simple_unlock(&mountlist_slock); 173 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 174 vfs_unbusy(mp); 175 return (0); 176 } 177 #endif 178 179 /* 180 * VFS Operations. 181 * 182 * mount system call 183 */ 184 int 185 filecore_mount(mp, path, data, ndp, p) 186 struct mount *mp; 187 const char *path; 188 void *data; 189 struct nameidata *ndp; 190 struct proc *p; 191 { 192 struct vnode *devvp; 193 struct filecore_args args; 194 int error; 195 struct filecore_mnt *fcmp = NULL; 196 197 if (mp->mnt_flag & MNT_GETARGS) { 198 fcmp = VFSTOFILECORE(mp); 199 if (fcmp == NULL) 200 return EIO; 201 args.flags = fcmp->fc_mntflags; 202 args.uid = fcmp->fc_uid; 203 args.gid = fcmp->fc_gid; 204 args.fspec = NULL; 205 vfs_showexport(mp, &args.export, &fcmp->fc_export); 206 return copyout(&args, data, sizeof(args)); 207 } 208 error = copyin(data, &args, sizeof (struct filecore_args)); 209 if (error) 210 return (error); 211 212 if ((mp->mnt_flag & MNT_RDONLY) == 0) 213 return (EROFS); 214 215 /* 216 * If updating, check whether changing from read-only to 217 * read/write; if there is no device name, that's all we do. 218 */ 219 if (mp->mnt_flag & MNT_UPDATE) { 220 fcmp = VFSTOFILECORE(mp); 221 if (args.fspec == 0) 222 return (vfs_export(mp, &fcmp->fc_export, &args.export)); 223 } 224 /* 225 * Not an update, or updating the name: look up the name 226 * and verify that it refers to a sensible block device. 227 */ 228 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 229 if ((error = namei(ndp)) != 0) 230 return (error); 231 devvp = ndp->ni_vp; 232 233 if (devvp->v_type != VBLK) { 234 vrele(devvp); 235 return ENOTBLK; 236 } 237 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 238 vrele(devvp); 239 return ENXIO; 240 } 241 /* 242 * If mount by non-root, then verify that user has necessary 243 * permissions on the device. 244 */ 245 if (p->p_ucred->cr_uid != 0) { 246 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 247 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p); 248 VOP_UNLOCK(devvp, 0); 249 if (error) { 250 vrele(devvp); 251 return (error); 252 } 253 } 254 if ((mp->mnt_flag & MNT_UPDATE) == 0) 255 error = filecore_mountfs(devvp, mp, p, &args); 256 else { 257 if (devvp != fcmp->fc_devvp) 258 error = EINVAL; /* needs translation */ 259 else 260 vrele(devvp); 261 } 262 if (error) { 263 vrele(devvp); 264 return error; 265 } 266 fcmp = VFSTOFILECORE(mp); 267 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 268 mp, p); 269 } 270 271 /* 272 * Common code for mount and mountroot 273 */ 274 static int 275 filecore_mountfs(devvp, mp, p, argp) 276 struct vnode *devvp; 277 struct mount *mp; 278 struct proc *p; 279 struct filecore_args *argp; 280 { 281 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 282 struct buf *bp = NULL; 283 dev_t dev = devvp->v_rdev; 284 int error = EINVAL; 285 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 286 extern struct vnode *rootvp; 287 struct filecore_disc_record *fcdr; 288 unsigned map; 289 unsigned log2secsize; 290 291 if (!ronly) 292 return EROFS; 293 294 /* 295 * Disallow multiple mounts of the same device. 296 * Disallow mounting of a device that is currently in use 297 * (except for root, which might share swap device for miniroot). 298 * Flush out any old buffers remaining from a previous use. 299 */ 300 if ((error = vfs_mountedon(devvp)) != 0) 301 return error; 302 if (vcount(devvp) > 1 && devvp != rootvp) 303 return EBUSY; 304 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) 305 return (error); 306 307 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 308 if (error) 309 return error; 310 311 /* Read the filecore boot block to check FS validity and to find the map */ 312 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 313 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 314 #ifdef FILECORE_DEBUG_BR 315 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 316 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 317 bp, error); 318 #endif 319 if (error != 0) 320 goto out; 321 if (filecore_bbchecksum(bp->b_data) != 0) { 322 error = EINVAL; 323 goto out; 324 } 325 fcdr = (struct filecore_disc_record *)(bp->b_data+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 *)(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 = p->p_cred->p_ruid; 386 fcmp->fc_gid = p->p_cred->p_rgid; 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, p); 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, p) 417 struct mount *mp; 418 int flags; 419 struct proc *p; 420 { 421 return 0; 422 } 423 424 /* 425 * unmount system call 426 */ 427 int 428 filecore_unmount(mp, mntflags, p) 429 struct mount *mp; 430 int mntflags; 431 struct proc *p; 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, p); 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, p) 482 struct mount *mp; 483 int cmd; 484 uid_t uid; 485 void *arg; 486 struct proc *p; 487 { 488 489 return (EOPNOTSUPP); 490 } 491 492 /* 493 * Get file system statistics. 494 */ 495 int 496 filecore_statvfs(mp, sbp, p) 497 struct mount *mp; 498 struct statvfs *sbp; 499 struct proc *p; 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, p) 521 struct mount *mp; 522 int waitfor; 523 struct ucred *cred; 524 struct proc *p; 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 *ifhp = (struct ifid *)fhp; 553 struct vnode *nvp; 554 struct filecore_node *ip; 555 int error; 556 557 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) { 558 *vpp = NULLVP; 559 return (error); 560 } 561 ip = VTOI(nvp); 562 if (filecore_staleinode(ip)) { 563 vput(nvp); 564 *vpp = NULLVP; 565 return (ESTALE); 566 } 567 *vpp = nvp; 568 return (0); 569 } 570 571 /* ARGSUSED */ 572 int 573 filecore_checkexp(mp, nam, exflagsp, credanonp) 574 struct mount *mp; 575 struct mbuf *nam; 576 int *exflagsp; 577 struct ucred **credanonp; 578 { 579 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 580 struct netcred *np; 581 582 /* 583 * Get the export permission structure for this <mp, client> tuple. 584 */ 585 np = vfs_export_lookup(mp, &fcmp->fc_export, nam); 586 if (np == NULL) 587 return (EACCES); 588 589 *exflagsp = np->netc_exflags; 590 *credanonp = &np->netc_anon; 591 return (0); 592 } 593 594 /* This looks complicated. Look at other vgets as well as the iso9660 one. 595 * 596 * The filecore inode number is made up of 1 byte directory entry index and 597 * 3 bytes of the internal disc address of the directory. On a read-only 598 * filesystem this is unique. For a read-write version we may not be able to 599 * do vget, see msdosfs. 600 */ 601 602 int 603 filecore_vget(mp, ino, vpp) 604 struct mount *mp; 605 ino_t ino; 606 struct vnode **vpp; 607 { 608 struct filecore_mnt *fcmp; 609 struct filecore_node *ip; 610 struct buf *bp; 611 struct vnode *vp; 612 dev_t dev; 613 int error; 614 615 fcmp = VFSTOFILECORE(mp); 616 dev = fcmp->fc_dev; 617 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 618 return (0); 619 620 /* Allocate a new vnode/filecore_node. */ 621 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 622 != 0) { 623 *vpp = NULLVP; 624 return (error); 625 } 626 ip = pool_get(&filecore_node_pool, PR_WAITOK); 627 memset(ip, 0, sizeof(struct filecore_node)); 628 vp->v_data = ip; 629 ip->i_vnode = vp; 630 ip->i_dev = dev; 631 ip->i_number = ino; 632 ip->i_block = -1; 633 ip->i_parent = -2; 634 635 /* 636 * Put it onto its hash chain and lock it so that other requests for 637 * this inode will block if they arrive while we are sleeping waiting 638 * for old data structures to be purged or for the contents of the 639 * disk portion of this inode to be read. 640 */ 641 filecore_ihashins(ip); 642 643 if (ino == FILECORE_ROOTINO) { 644 /* Here we need to construct a root directory inode */ 645 memcpy(ip->i_dirent.name, "root", 4); 646 ip->i_dirent.load = 0; 647 ip->i_dirent.exec = 0; 648 ip->i_dirent.len = FILECORE_DIR_SIZE; 649 ip->i_dirent.addr = fcmp->drec.root; 650 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 651 652 } else { 653 /* Read in Data from Directory Entry */ 654 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 655 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 656 vput(vp); 657 #ifdef FILECORE_DEBUG_BR 658 printf("brelse(%p) vf4\n", bp); 659 #endif 660 brelse(bp); 661 *vpp = NULL; 662 return (error); 663 } 664 665 memcpy(&ip->i_dirent, 666 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 667 sizeof(struct filecore_direntry)); 668 #ifdef FILECORE_DEBUG_BR 669 printf("brelse(%p) vf5\n", bp); 670 #endif 671 brelse(bp); 672 } 673 674 ip->i_mnt = fcmp; 675 ip->i_devvp = fcmp->fc_devvp; 676 ip->i_diroff = 0; 677 VREF(ip->i_devvp); 678 679 /* 680 * Setup type 681 */ 682 vp->v_type = VREG; 683 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 684 vp->v_type = VDIR; 685 686 /* 687 * Initialize the associated vnode 688 */ 689 switch (vp->v_type) { 690 case VFIFO: 691 case VCHR: 692 case VBLK: 693 /* 694 * Devices not supported. 695 */ 696 vput(vp); 697 return (EOPNOTSUPP); 698 case VLNK: 699 case VNON: 700 case VSOCK: 701 case VDIR: 702 case VBAD: 703 case VREG: 704 break; 705 } 706 707 if (ino == FILECORE_ROOTINO) 708 vp->v_flag |= VROOT; 709 710 /* 711 * XXX need generation number? 712 */ 713 714 genfs_node_init(vp, &filecore_genfsops); 715 vp->v_size = ip->i_size; 716 *vpp = vp; 717 return (0); 718 } 719 720 /* 721 * Vnode pointer to File handle 722 */ 723 /* ARGSUSED */ 724 int 725 filecore_vptofh(vp, fhp) 726 struct vnode *vp; 727 struct fid *fhp; 728 { 729 struct filecore_node *ip = VTOI(vp); 730 struct ifid *ifhp; 731 732 ifhp = (struct ifid *)fhp; 733 ifhp->ifid_len = sizeof(struct ifid); 734 ifhp->ifid_ino = ip->i_number; 735 return 0; 736 } 737 738 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 739 { 740 741 sysctl_createv(clog, 0, NULL, NULL, 742 CTLFLAG_PERMANENT, 743 CTLTYPE_NODE, "vfs", NULL, 744 NULL, 0, NULL, 0, 745 CTL_VFS, CTL_EOL); 746 sysctl_createv(clog, 0, NULL, NULL, 747 CTLFLAG_PERMANENT, 748 CTLTYPE_NODE, "filecore", 749 SYSCTL_DESCR("Acorn FILECORE file system"), 750 NULL, 0, NULL, 0, 751 CTL_VFS, 19, CTL_EOL); 752 /* 753 * XXX the "19" above could be dynamic, thereby eliminating 754 * one more instance of the "number to vfs" mapping problem, 755 * but "19" is the order as taken from sys/mount.h 756 */ 757 } 758
Indexes created Wed Oct 01 12:09:54 GMT 2025