filecore_vfsops.c revision 1.5.2.11
1 /* $NetBSD: filecore_vfsops.c,v 1.5.2.11 2005/04/01 14:30:56 skrll 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 1.5.2.11 2005/04/01 14:30:56 skrll 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 VFS_ATTACH(filecore_vfsops); 128 129 struct genfs_ops filecore_genfsops = { 130 genfs_size, 131 }; 132 133 /* 134 * Called by vfs_mountroot when iso is going to be mounted as root. 135 * 136 * Name is updated by mount(8) after booting. 137 */ 138 139 static int filecore_mountfs __P((struct vnode *devvp, struct mount *mp, 140 struct lwp *l, struct filecore_args *argp)); 141 142 #if 0 143 int 144 filecore_mountroot() 145 { 146 struct mount *mp; 147 extern struct vnode *rootvp; 148 struct proc *p = curproc; /* XXX */ 149 int error; 150 struct filecore_args args; 151 152 if (root_device->dv_class != DV_DISK) 153 return (ENODEV); 154 155 /* 156 * Get vnodes for swapdev and rootdev. 157 */ 158 if (bdevvp(rootdev, &rootvp)) 159 panic("filecore_mountroot: can't setup rootvp"); 160 161 if ((error = vfs_rootmountalloc(MOUNT_FILECORE, "root_device", &mp)) != 0) 162 return (error); 163 164 args.flags = FILECOREMNT_ROOT; 165 if ((error = filecore_mountfs(rootvp, mp, p, &args)) != 0) { 166 mp->mnt_op->vfs_refcount--; 167 vfs_unbusy(mp); 168 free(mp, M_MOUNT); 169 return (error); 170 } 171 simple_lock(&mountlist_slock); 172 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 173 simple_unlock(&mountlist_slock); 174 (void)filecore_statvfs(mp, &mp->mnt_stat, p); 175 vfs_unbusy(mp); 176 return (0); 177 } 178 #endif 179 180 /* 181 * VFS Operations. 182 * 183 * mount system call 184 */ 185 int 186 filecore_mount(mp, path, data, ndp, l) 187 struct mount *mp; 188 const char *path; 189 void *data; 190 struct nameidata *ndp; 191 struct lwp *l; 192 { 193 struct vnode *devvp; 194 struct filecore_args args; 195 struct proc *p; 196 int error; 197 struct filecore_mnt *fcmp = NULL; 198 199 p = l->l_proc; 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 vfs_showexport(mp, &args.export, &fcmp->fc_export); 209 return copyout(&args, data, sizeof(args)); 210 } 211 error = copyin(data, &args, sizeof (struct filecore_args)); 212 if (error) 213 return (error); 214 215 if ((mp->mnt_flag & MNT_RDONLY) == 0) 216 return (EROFS); 217 218 /* 219 * If updating, check whether changing from read-only to 220 * read/write; if there is no device name, that's all we do. 221 */ 222 if (mp->mnt_flag & MNT_UPDATE) { 223 fcmp = VFSTOFILECORE(mp); 224 if (args.fspec == 0) 225 return (vfs_export(mp, &fcmp->fc_export, &args.export)); 226 } 227 /* 228 * Not an update, or updating the name: look up the name 229 * and verify that it refers to a sensible block device. 230 */ 231 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 232 if ((error = namei(ndp)) != 0) 233 return (error); 234 devvp = ndp->ni_vp; 235 236 if (devvp->v_type != VBLK) { 237 vrele(devvp); 238 return ENOTBLK; 239 } 240 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 241 vrele(devvp); 242 return ENXIO; 243 } 244 /* 245 * If mount by non-root, then verify that user has necessary 246 * permissions on the device. 247 */ 248 if (p->p_ucred->cr_uid != 0) { 249 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 250 error = VOP_ACCESS(devvp, VREAD, p->p_ucred, l); 251 VOP_UNLOCK(devvp, 0); 252 if (error) { 253 vrele(devvp); 254 return (error); 255 } 256 } 257 if ((mp->mnt_flag & MNT_UPDATE) == 0) 258 error = filecore_mountfs(devvp, mp, l, &args); 259 else { 260 if (devvp != fcmp->fc_devvp) 261 error = EINVAL; /* needs translation */ 262 else 263 vrele(devvp); 264 } 265 if (error) { 266 vrele(devvp); 267 return error; 268 } 269 fcmp = VFSTOFILECORE(mp); 270 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 271 mp, l); 272 } 273 274 /* 275 * Common code for mount and mountroot 276 */ 277 static int 278 filecore_mountfs(devvp, mp, l, argp) 279 struct vnode *devvp; 280 struct mount *mp; 281 struct lwp *l; 282 struct filecore_args *argp; 283 { 284 struct filecore_mnt *fcmp = (struct filecore_mnt *)0; 285 struct buf *bp = NULL; 286 dev_t dev = devvp->v_rdev; 287 int error = EINVAL; 288 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 289 extern struct vnode *rootvp; 290 struct filecore_disc_record *fcdr; 291 unsigned map; 292 unsigned log2secsize; 293 294 if (!ronly) 295 return EROFS; 296 297 /* 298 * Disallow multiple mounts of the same device. 299 * Disallow mounting of a device that is currently in use 300 * (except for root, which might share swap device for miniroot). 301 * Flush out any old buffers remaining from a previous use. 302 */ 303 if ((error = vfs_mountedon(devvp)) != 0) 304 return error; 305 if (vcount(devvp) > 1 && devvp != rootvp) 306 return EBUSY; 307 if ((error = vinvalbuf(devvp, V_SAVE, l->l_proc->p_ucred, l, 0, 0)) 308 != 0) 309 return (error); 310 311 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, l); 312 if (error) 313 return error; 314 315 /* Read the filecore boot block to check FS validity and to find the map */ 316 error = bread(devvp, FILECORE_BOOTBLOCK_BLKN, 317 FILECORE_BOOTBLOCK_SIZE, NOCRED, &bp); 318 #ifdef FILECORE_DEBUG_BR 319 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 320 FILECORE_BOOTBLOCK_BLKN, FILECORE_BOOTBLOCK_SIZE, 321 bp, error); 322 #endif 323 if (error != 0) 324 goto out; 325 if (filecore_bbchecksum(bp->b_data) != 0) { 326 error = EINVAL; 327 goto out; 328 } 329 fcdr = (struct filecore_disc_record *)(bp->b_data+FILECORE_BB_DISCREC); 330 map = ((((8 << fcdr->log2secsize) - fcdr->zone_spare) 331 * (fcdr->nzones / 2) - 8 * FILECORE_DISCREC_SIZE) 332 << fcdr->log2bpmb) >> fcdr->log2secsize; 333 log2secsize = fcdr->log2secsize; 334 bp->b_flags |= B_AGE; 335 #ifdef FILECORE_DEBUG_BR 336 printf("brelse(%p) vf1\n", bp); 337 #endif 338 brelse(bp); 339 bp = NULL; 340 341 /* Read the bootblock in the map */ 342 error = bread(devvp, map, 1 << log2secsize, NOCRED, &bp); 343 #ifdef FILECORE_DEBUG_BR 344 printf("bread(%p, %x, %d, CRED, %p)=%d\n", devvp, 345 map, 1 << log2secsize, bp, error); 346 #endif 347 if (error != 0) 348 goto out; 349 fcdr = (struct filecore_disc_record *)(bp->b_data + 4); 350 fcmp = malloc(sizeof *fcmp, M_FILECOREMNT, M_WAITOK); 351 memset(fcmp, 0, sizeof *fcmp); 352 if (fcdr->log2bpmb > fcdr->log2secsize) 353 fcmp->log2bsize = fcdr->log2bpmb; 354 else fcmp->log2bsize = fcdr->log2secsize; 355 fcmp->blksize = 1 << fcmp->log2bsize; 356 memcpy(&fcmp->drec, fcdr, sizeof(*fcdr)); 357 fcmp->map = map; 358 fcmp->idspz = ((8 << fcdr->log2secsize) - fcdr->zone_spare) 359 / (fcdr->idlen + 1); 360 fcmp->mask = (1 << fcdr->idlen) - 1; 361 if (fcdr->big_flag & 1) { 362 fcmp->nblks = ((((u_int64_t)fcdr->disc_size_2) << 32) 363 + fcdr->disc_size) / fcmp->blksize; 364 } else { 365 fcmp->nblks=fcdr->disc_size / fcmp->blksize; 366 } 367 368 bp->b_flags |= B_AGE; 369 #ifdef FILECORE_DEBUG_BR 370 printf("brelse(%p) vf2\n", bp); 371 #endif 372 brelse(bp); 373 bp = NULL; 374 375 mp->mnt_data = fcmp; 376 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 377 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FILECORE); 378 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 379 mp->mnt_stat.f_namemax = 10; 380 mp->mnt_flag |= MNT_LOCAL; 381 mp->mnt_dev_bshift = fcdr->log2secsize; 382 mp->mnt_fs_bshift = fcmp->log2bsize; 383 384 fcmp->fc_mountp = mp; 385 fcmp->fc_dev = dev; 386 fcmp->fc_devvp = devvp; 387 fcmp->fc_mntflags = argp->flags; 388 if (argp->flags & FILECOREMNT_USEUID) { 389 fcmp->fc_uid = l->l_proc->p_cred->p_ruid; 390 fcmp->fc_gid = l->l_proc->p_cred->p_rgid; 391 } else { 392 fcmp->fc_uid = argp->uid; 393 fcmp->fc_gid = argp->gid; 394 } 395 396 return 0; 397 out: 398 if (bp) { 399 #ifdef FILECORE_DEBUG_BR 400 printf("brelse(%p) vf3\n", bp); 401 #endif 402 brelse(bp); 403 } 404 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 405 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, l); 406 VOP_UNLOCK(devvp, 0); 407 if (fcmp) { 408 free(fcmp, M_FILECOREMNT); 409 mp->mnt_data = NULL; 410 } 411 return error; 412 } 413 414 /* 415 * Make a filesystem operational. 416 * Nothing to do at the moment. 417 */ 418 /* ARGSUSED */ 419 int 420 filecore_start(mp, flags, l) 421 struct mount *mp; 422 int flags; 423 struct lwp *l; 424 { 425 return 0; 426 } 427 428 /* 429 * unmount system call 430 */ 431 int 432 filecore_unmount(mp, mntflags, l) 433 struct mount *mp; 434 int mntflags; 435 struct lwp *l; 436 { 437 struct filecore_mnt *fcmp; 438 int error, flags = 0; 439 440 if (mntflags & MNT_FORCE) 441 flags |= FORCECLOSE; 442 #if 0 443 mntflushbuf(mp, 0); 444 if (mntinvalbuf(mp)) 445 return EBUSY; 446 #endif 447 if ((error = vflush(mp, NULLVP, flags)) != 0) 448 return (error); 449 450 fcmp = VFSTOFILECORE(mp); 451 452 if (fcmp->fc_devvp->v_type != VBAD) 453 fcmp->fc_devvp->v_specmountpoint = NULL; 454 vn_lock(fcmp->fc_devvp, LK_EXCLUSIVE | LK_RETRY); 455 error = VOP_CLOSE(fcmp->fc_devvp, FREAD, NOCRED, l); 456 vput(fcmp->fc_devvp); 457 free(fcmp, M_FILECOREMNT); 458 mp->mnt_data = NULL; 459 mp->mnt_flag &= ~MNT_LOCAL; 460 return (error); 461 } 462 463 /* 464 * Return root of a filesystem 465 */ 466 int 467 filecore_root(mp, vpp) 468 struct mount *mp; 469 struct vnode **vpp; 470 { 471 struct vnode *nvp; 472 int error; 473 474 if ((error = VFS_VGET(mp, FILECORE_ROOTINO, &nvp)) != 0) 475 return (error); 476 *vpp = nvp; 477 return (0); 478 } 479 480 /* 481 * Do operations associated with quotas, not supported 482 */ 483 /* ARGSUSED */ 484 int 485 filecore_quotactl(mp, cmd, uid, arg, l) 486 struct mount *mp; 487 int cmd; 488 uid_t uid; 489 void *arg; 490 struct lwp *l; 491 { 492 493 return (EOPNOTSUPP); 494 } 495 496 /* 497 * Get file system statistics. 498 */ 499 int 500 filecore_statvfs(mp, sbp, l) 501 struct mount *mp; 502 struct statvfs *sbp; 503 struct lwp *l; 504 { 505 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 506 507 sbp->f_bsize = fcmp->blksize; 508 sbp->f_frsize = sbp->f_bsize; /* XXX */ 509 sbp->f_iosize = sbp->f_bsize; /* XXX */ 510 sbp->f_blocks = fcmp->nblks; 511 sbp->f_bfree = 0; /* total free blocks */ 512 sbp->f_bavail = 0; /* blocks free for non superuser */ 513 sbp->f_bresvd = 0; /* reserved blocks */ 514 sbp->f_files = 0; /* total files */ 515 sbp->f_ffree = 0; /* free file nodes for non superuser */ 516 sbp->f_favail = 0; /* free file nodes */ 517 sbp->f_fresvd = 0; /* reserved file nodes */ 518 copy_statvfs_info(sbp, mp); 519 return 0; 520 } 521 522 /* ARGSUSED */ 523 int 524 filecore_sync(mp, waitfor, cred, l) 525 struct mount *mp; 526 int waitfor; 527 struct ucred *cred; 528 struct lwp *l; 529 { 530 return (0); 531 } 532 533 /* 534 * File handle to vnode 535 * 536 * Have to be really careful about stale file handles: 537 * - check that the inode number is in range 538 * - call iget() to get the locked inode 539 * - check for an unallocated inode (i_mode == 0) 540 * - check that the generation number matches 541 */ 542 543 struct ifid { 544 ushort ifid_len; 545 ushort ifid_pad; 546 u_int32_t ifid_ino; 547 }; 548 549 /* ARGSUSED */ 550 int 551 filecore_fhtovp(mp, fhp, vpp) 552 struct mount *mp; 553 struct fid *fhp; 554 struct vnode **vpp; 555 { 556 struct ifid *ifhp = (struct ifid *)fhp; 557 struct vnode *nvp; 558 struct filecore_node *ip; 559 int error; 560 561 if ((error = VFS_VGET(mp, ifhp->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 /* ARGSUSED */ 576 int 577 filecore_checkexp(mp, nam, exflagsp, credanonp) 578 struct mount *mp; 579 struct mbuf *nam; 580 int *exflagsp; 581 struct ucred **credanonp; 582 { 583 struct filecore_mnt *fcmp = VFSTOFILECORE(mp); 584 struct netcred *np; 585 586 /* 587 * Get the export permission structure for this <mp, client> tuple. 588 */ 589 np = vfs_export_lookup(mp, &fcmp->fc_export, nam); 590 if (np == NULL) 591 return (EACCES); 592 593 *exflagsp = np->netc_exflags; 594 *credanonp = &np->netc_anon; 595 return (0); 596 } 597 598 /* This looks complicated. Look at other vgets as well as the iso9660 one. 599 * 600 * The filecore inode number is made up of 1 byte directory entry index and 601 * 3 bytes of the internal disc address of the directory. On a read-only 602 * filesystem this is unique. For a read-write version we may not be able to 603 * do vget, see msdosfs. 604 */ 605 606 int 607 filecore_vget(mp, ino, vpp) 608 struct mount *mp; 609 ino_t ino; 610 struct vnode **vpp; 611 { 612 struct filecore_mnt *fcmp; 613 struct filecore_node *ip; 614 struct buf *bp; 615 struct vnode *vp; 616 dev_t dev; 617 int error; 618 619 fcmp = VFSTOFILECORE(mp); 620 dev = fcmp->fc_dev; 621 if ((*vpp = filecore_ihashget(dev, ino)) != NULLVP) 622 return (0); 623 624 /* Allocate a new vnode/filecore_node. */ 625 if ((error = getnewvnode(VT_FILECORE, mp, filecore_vnodeop_p, &vp)) 626 != 0) { 627 *vpp = NULLVP; 628 return (error); 629 } 630 ip = pool_get(&filecore_node_pool, PR_WAITOK); 631 memset(ip, 0, sizeof(struct filecore_node)); 632 vp->v_data = ip; 633 ip->i_vnode = vp; 634 ip->i_dev = dev; 635 ip->i_number = ino; 636 ip->i_block = -1; 637 ip->i_parent = -2; 638 639 /* 640 * Put it onto its hash chain and lock it so that other requests for 641 * this inode will block if they arrive while we are sleeping waiting 642 * for old data structures to be purged or for the contents of the 643 * disk portion of this inode to be read. 644 */ 645 filecore_ihashins(ip); 646 647 if (ino == FILECORE_ROOTINO) { 648 /* Here we need to construct a root directory inode */ 649 memcpy(ip->i_dirent.name, "root", 4); 650 ip->i_dirent.load = 0; 651 ip->i_dirent.exec = 0; 652 ip->i_dirent.len = FILECORE_DIR_SIZE; 653 ip->i_dirent.addr = fcmp->drec.root; 654 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 655 656 } else { 657 /* Read in Data from Directory Entry */ 658 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 659 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 660 vput(vp); 661 #ifdef FILECORE_DEBUG_BR 662 printf("brelse(%p) vf4\n", bp); 663 #endif 664 brelse(bp); 665 *vpp = NULL; 666 return (error); 667 } 668 669 memcpy(&ip->i_dirent, 670 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 671 sizeof(struct filecore_direntry)); 672 #ifdef FILECORE_DEBUG_BR 673 printf("brelse(%p) vf5\n", bp); 674 #endif 675 brelse(bp); 676 } 677 678 ip->i_mnt = fcmp; 679 ip->i_devvp = fcmp->fc_devvp; 680 ip->i_diroff = 0; 681 VREF(ip->i_devvp); 682 683 /* 684 * Setup type 685 */ 686 vp->v_type = VREG; 687 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 688 vp->v_type = VDIR; 689 690 /* 691 * Initialize the associated vnode 692 */ 693 switch (vp->v_type) { 694 case VFIFO: 695 case VCHR: 696 case VBLK: 697 /* 698 * Devices not supported. 699 */ 700 vput(vp); 701 return (EOPNOTSUPP); 702 case VLNK: 703 case VNON: 704 case VSOCK: 705 case VDIR: 706 case VBAD: 707 case VREG: 708 break; 709 } 710 711 if (ino == FILECORE_ROOTINO) 712 vp->v_flag |= VROOT; 713 714 /* 715 * XXX need generation number? 716 */ 717 718 genfs_node_init(vp, &filecore_genfsops); 719 vp->v_size = ip->i_size; 720 *vpp = vp; 721 return (0); 722 } 723 724 /* 725 * Vnode pointer to File handle 726 */ 727 /* ARGSUSED */ 728 int 729 filecore_vptofh(vp, fhp) 730 struct vnode *vp; 731 struct fid *fhp; 732 { 733 struct filecore_node *ip = VTOI(vp); 734 struct ifid *ifhp; 735 736 ifhp = (struct ifid *)fhp; 737 ifhp->ifid_len = sizeof(struct ifid); 738 ifhp->ifid_ino = ip->i_number; 739 return 0; 740 } 741 742 SYSCTL_SETUP(sysctl_vfs_filecore_setup, "sysctl vfs.filecore subtree setup") 743 { 744 745 sysctl_createv(clog, 0, NULL, NULL, 746 CTLFLAG_PERMANENT, 747 CTLTYPE_NODE, "vfs", NULL, 748 NULL, 0, NULL, 0, 749 CTL_VFS, CTL_EOL); 750 sysctl_createv(clog, 0, NULL, NULL, 751 CTLFLAG_PERMANENT, 752 CTLTYPE_NODE, "filecore", 753 SYSCTL_DESCR("Acorn FILECORE file system"), 754 NULL, 0, NULL, 0, 755 CTL_VFS, 19, CTL_EOL); 756 /* 757 * XXX the "19" above could be dynamic, thereby eliminating 758 * one more instance of the "number to vfs" mapping problem, 759 * but "19" is the order as taken from sys/mount.h 760 */ 761 } 762
Indexes created Wed Oct 01 12:09:54 GMT 2025