1 /* $NetBSD: ext2fs_vfsops.c,v 1.193 2015/03/28 19:24:04 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1991, 1993, 1994 5 * The Regents of the University of California. 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 * @(#)ffs_vfsops.c 8.14 (Berkeley) 11/28/94 32 * Modified for ext2fs by Manuel Bouyer. 33 */ 34 35 /* 36 * Copyright (c) 1997 Manuel Bouyer. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 * 58 * @(#)ffs_vfsops.c 8.14 (Berkeley) 11/28/94 59 * Modified for ext2fs by Manuel Bouyer. 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: ext2fs_vfsops.c,v 1.193 2015/03/28 19:24:04 maxv Exp $"); 64 65 #if defined(_KERNEL_OPT) 66 #include "opt_compat_netbsd.h" 67 #endif 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/sysctl.h> 72 #include <sys/namei.h> 73 #include <sys/proc.h> 74 #include <sys/kernel.h> 75 #include <sys/vnode.h> 76 #include <sys/socket.h> 77 #include <sys/mount.h> 78 #include <sys/buf.h> 79 #include <sys/device.h> 80 #include <sys/mbuf.h> 81 #include <sys/file.h> 82 #include <sys/disklabel.h> 83 #include <sys/ioctl.h> 84 #include <sys/errno.h> 85 #include <sys/pool.h> 86 #include <sys/lock.h> 87 #include <sys/conf.h> 88 #include <sys/kauth.h> 89 #include <sys/module.h> 90 91 #include <miscfs/genfs/genfs.h> 92 #include <miscfs/specfs/specdev.h> 93 94 #include <ufs/ufs/quota.h> 95 #include <ufs/ufs/ufsmount.h> 96 #include <ufs/ufs/inode.h> 97 #include <ufs/ufs/dir.h> 98 #include <ufs/ufs/ufs_extern.h> 99 100 #include <ufs/ext2fs/ext2fs.h> 101 #include <ufs/ext2fs/ext2fs_dir.h> 102 #include <ufs/ext2fs/ext2fs_extern.h> 103 104 MODULE(MODULE_CLASS_VFS, ext2fs, "ffs"); 105 106 int ext2fs_sbupdate(struct ufsmount *, int); 107 static int ext2fs_sbfill(struct m_ext2fs *, int); 108 109 static struct sysctllog *ext2fs_sysctl_log; 110 111 extern const struct vnodeopv_desc ext2fs_vnodeop_opv_desc; 112 extern const struct vnodeopv_desc ext2fs_specop_opv_desc; 113 extern const struct vnodeopv_desc ext2fs_fifoop_opv_desc; 114 115 const struct vnodeopv_desc * const ext2fs_vnodeopv_descs[] = { 116 &ext2fs_vnodeop_opv_desc, 117 &ext2fs_specop_opv_desc, 118 &ext2fs_fifoop_opv_desc, 119 NULL, 120 }; 121 122 struct vfsops ext2fs_vfsops = { 123 .vfs_name = MOUNT_EXT2FS, 124 .vfs_min_mount_data = sizeof (struct ufs_args), 125 .vfs_mount = ext2fs_mount, 126 .vfs_start = ufs_start, 127 .vfs_unmount = ext2fs_unmount, 128 .vfs_root = ufs_root, 129 .vfs_quotactl = ufs_quotactl, 130 .vfs_statvfs = ext2fs_statvfs, 131 .vfs_sync = ext2fs_sync, 132 .vfs_vget = ufs_vget, 133 .vfs_loadvnode = ext2fs_loadvnode, 134 .vfs_fhtovp = ext2fs_fhtovp, 135 .vfs_vptofh = ext2fs_vptofh, 136 .vfs_init = ext2fs_init, 137 .vfs_reinit = ext2fs_reinit, 138 .vfs_done = ext2fs_done, 139 .vfs_mountroot = ext2fs_mountroot, 140 .vfs_snapshot = (void *)eopnotsupp, 141 .vfs_extattrctl = vfs_stdextattrctl, 142 .vfs_suspendctl = (void *)eopnotsupp, 143 .vfs_renamelock_enter = genfs_renamelock_enter, 144 .vfs_renamelock_exit = genfs_renamelock_exit, 145 .vfs_fsync = (void *)eopnotsupp, 146 .vfs_opv_descs = ext2fs_vnodeopv_descs 147 }; 148 149 static const struct genfs_ops ext2fs_genfsops = { 150 .gop_size = genfs_size, 151 .gop_alloc = ext2fs_gop_alloc, 152 .gop_write = genfs_gop_write, 153 .gop_markupdate = ufs_gop_markupdate, 154 }; 155 156 static const struct ufs_ops ext2fs_ufsops = { 157 .uo_itimes = ext2fs_itimes, 158 .uo_update = ext2fs_update, 159 .uo_bufrd = ext2fs_bufrd, 160 .uo_bufwr = ext2fs_bufwr, 161 }; 162 163 /* Fill in the inode uid/gid from ext2 halves. */ 164 void 165 ext2fs_set_inode_guid(struct inode *ip) 166 { 167 168 ip->i_gid = ip->i_e2fs_gid; 169 ip->i_uid = ip->i_e2fs_uid; 170 if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) { 171 ip->i_gid |= ip->i_e2fs_gid_high << 16; 172 ip->i_uid |= ip->i_e2fs_uid_high << 16; 173 } 174 } 175 176 static int 177 ext2fs_modcmd(modcmd_t cmd, void *arg) 178 { 179 int error; 180 181 switch (cmd) { 182 case MODULE_CMD_INIT: 183 error = vfs_attach(&ext2fs_vfsops); 184 if (error != 0) 185 break; 186 sysctl_createv(&ext2fs_sysctl_log, 0, NULL, NULL, 187 CTLFLAG_PERMANENT, 188 CTLTYPE_NODE, "ext2fs", 189 SYSCTL_DESCR("Linux EXT2FS file system"), 190 NULL, 0, NULL, 0, 191 CTL_VFS, 17, CTL_EOL); 192 /* 193 * XXX the "17" above could be dynamic, thereby eliminating 194 * one more instance of the "number to vfs" mapping problem, 195 * but "17" is the order as taken from sys/mount.h 196 */ 197 break; 198 case MODULE_CMD_FINI: 199 error = vfs_detach(&ext2fs_vfsops); 200 if (error != 0) 201 break; 202 sysctl_teardown(&ext2fs_sysctl_log); 203 break; 204 default: 205 error = ENOTTY; 206 break; 207 } 208 209 return (error); 210 } 211 212 /* 213 * XXX Same structure as FFS inodes? Should we share a common pool? 214 */ 215 struct pool ext2fs_inode_pool; 216 struct pool ext2fs_dinode_pool; 217 218 extern u_long ext2gennumber; 219 220 void 221 ext2fs_init(void) 222 { 223 224 pool_init(&ext2fs_inode_pool, sizeof(struct inode), 0, 0, 0, 225 "ext2fsinopl", &pool_allocator_nointr, IPL_NONE); 226 pool_init(&ext2fs_dinode_pool, sizeof(struct ext2fs_dinode), 0, 0, 0, 227 "ext2dinopl", &pool_allocator_nointr, IPL_NONE); 228 ufs_init(); 229 } 230 231 void 232 ext2fs_reinit(void) 233 { 234 ufs_reinit(); 235 } 236 237 void 238 ext2fs_done(void) 239 { 240 241 ufs_done(); 242 pool_destroy(&ext2fs_inode_pool); 243 pool_destroy(&ext2fs_dinode_pool); 244 } 245 246 /* 247 * Called by main() when ext2fs is going to be mounted as root. 248 * 249 * Name is updated by mount(8) after booting. 250 */ 251 252 int 253 ext2fs_mountroot(void) 254 { 255 extern struct vnode *rootvp; 256 struct m_ext2fs *fs; 257 struct mount *mp; 258 struct ufsmount *ump; 259 int error; 260 261 if (device_class(root_device) != DV_DISK) 262 return (ENODEV); 263 264 if ((error = vfs_rootmountalloc(MOUNT_EXT2FS, "root_device", &mp))) { 265 vrele(rootvp); 266 return (error); 267 } 268 269 if ((error = ext2fs_mountfs(rootvp, mp)) != 0) { 270 vfs_unbusy(mp, false, NULL); 271 vfs_destroy(mp); 272 return (error); 273 } 274 mountlist_append(mp); 275 ump = VFSTOUFS(mp); 276 fs = ump->um_e2fs; 277 memset(fs->e2fs_fsmnt, 0, sizeof(fs->e2fs_fsmnt)); 278 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 279 sizeof(fs->e2fs_fsmnt) - 1, 0); 280 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 281 memset(fs->e2fs.e2fs_fsmnt, 0, sizeof(fs->e2fs.e2fs_fsmnt)); 282 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 283 sizeof(fs->e2fs.e2fs_fsmnt) - 1, 0); 284 } 285 (void)ext2fs_statvfs(mp, &mp->mnt_stat); 286 vfs_unbusy(mp, false, NULL); 287 setrootfstime((time_t)fs->e2fs.e2fs_wtime); 288 return (0); 289 } 290 291 /* 292 * VFS Operations. 293 * 294 * mount system call 295 */ 296 int 297 ext2fs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 298 { 299 struct lwp *l = curlwp; 300 struct vnode *devvp; 301 struct ufs_args *args = data; 302 struct ufsmount *ump = NULL; 303 struct m_ext2fs *fs; 304 size_t size; 305 int error = 0, flags, update; 306 mode_t accessmode; 307 308 if (args == NULL) 309 return EINVAL; 310 if (*data_len < sizeof *args) 311 return EINVAL; 312 313 if (mp->mnt_flag & MNT_GETARGS) { 314 ump = VFSTOUFS(mp); 315 if (ump == NULL) 316 return EIO; 317 memset(args, 0, sizeof *args); 318 args->fspec = NULL; 319 *data_len = sizeof *args; 320 return 0; 321 } 322 323 update = mp->mnt_flag & MNT_UPDATE; 324 325 /* Check arguments */ 326 if (args->fspec != NULL) { 327 /* 328 * Look up the name and verify that it's sane. 329 */ 330 error = namei_simple_user(args->fspec, 331 NSM_FOLLOW_NOEMULROOT, &devvp); 332 if (error != 0) 333 return (error); 334 335 if (!update) { 336 /* 337 * Be sure this is a valid block device 338 */ 339 if (devvp->v_type != VBLK) 340 error = ENOTBLK; 341 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 342 error = ENXIO; 343 } else { 344 /* 345 * Be sure we're still naming the same device 346 * used for our initial mount 347 */ 348 ump = VFSTOUFS(mp); 349 if (devvp != ump->um_devvp) { 350 if (devvp->v_rdev != ump->um_devvp->v_rdev) 351 error = EINVAL; 352 else { 353 vrele(devvp); 354 devvp = ump->um_devvp; 355 vref(devvp); 356 } 357 } 358 } 359 } else { 360 if (!update) { 361 /* New mounts must have a filename for the device */ 362 return (EINVAL); 363 } else { 364 ump = VFSTOUFS(mp); 365 devvp = ump->um_devvp; 366 vref(devvp); 367 } 368 } 369 370 /* 371 * If mount by non-root, then verify that user has necessary 372 * permissions on the device. 373 * 374 * Permission to update a mount is checked higher, so here we presume 375 * updating the mount is okay (for example, as far as securelevel goes) 376 * which leaves us with the normal check. 377 */ 378 if (error == 0) { 379 accessmode = VREAD; 380 if (update ? 381 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 382 (mp->mnt_flag & MNT_RDONLY) == 0) 383 accessmode |= VWRITE; 384 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 385 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 386 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 387 KAUTH_ARG(accessmode)); 388 VOP_UNLOCK(devvp); 389 } 390 391 if (error) { 392 vrele(devvp); 393 return (error); 394 } 395 396 if (!update) { 397 int xflags; 398 399 if (mp->mnt_flag & MNT_RDONLY) 400 xflags = FREAD; 401 else 402 xflags = FREAD|FWRITE; 403 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 404 error = VOP_OPEN(devvp, xflags, FSCRED); 405 VOP_UNLOCK(devvp); 406 if (error) 407 goto fail; 408 error = ext2fs_mountfs(devvp, mp); 409 if (error) { 410 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 411 (void)VOP_CLOSE(devvp, xflags, NOCRED); 412 VOP_UNLOCK(devvp); 413 goto fail; 414 } 415 416 ump = VFSTOUFS(mp); 417 fs = ump->um_e2fs; 418 } else { 419 /* 420 * Update the mount. 421 */ 422 423 /* 424 * The initial mount got a reference on this 425 * device, so drop the one obtained via 426 * namei(), above. 427 */ 428 vrele(devvp); 429 430 ump = VFSTOUFS(mp); 431 fs = ump->um_e2fs; 432 if (fs->e2fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 433 /* 434 * Changing from r/w to r/o 435 */ 436 flags = WRITECLOSE; 437 if (mp->mnt_flag & MNT_FORCE) 438 flags |= FORCECLOSE; 439 error = ext2fs_flushfiles(mp, flags); 440 if (error == 0 && 441 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 442 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 443 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 444 (void) ext2fs_sbupdate(ump, MNT_WAIT); 445 } 446 if (error) 447 return (error); 448 fs->e2fs_ronly = 1; 449 } 450 451 if (mp->mnt_flag & MNT_RELOAD) { 452 error = ext2fs_reload(mp, l->l_cred, l); 453 if (error) 454 return (error); 455 } 456 457 if (fs->e2fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 458 /* 459 * Changing from read-only to read/write 460 */ 461 fs->e2fs_ronly = 0; 462 if (fs->e2fs.e2fs_state == E2FS_ISCLEAN) 463 fs->e2fs.e2fs_state = 0; 464 else 465 fs->e2fs.e2fs_state = E2FS_ERRORS; 466 fs->e2fs_fmod = 1; 467 } 468 if (args->fspec == NULL) 469 return 0; 470 } 471 472 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 473 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 474 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 475 sizeof(fs->e2fs_fsmnt) - 1, &size); 476 memset(fs->e2fs_fsmnt + size, 0, sizeof(fs->e2fs_fsmnt) - size); 477 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 478 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 479 sizeof(fs->e2fs.e2fs_fsmnt) - 1, &size); 480 memset(fs->e2fs.e2fs_fsmnt, 0, 481 sizeof(fs->e2fs.e2fs_fsmnt) - size); 482 } 483 if (fs->e2fs_fmod != 0) { /* XXX */ 484 fs->e2fs_fmod = 0; 485 if (fs->e2fs.e2fs_state == 0) 486 fs->e2fs.e2fs_wtime = time_second; 487 else 488 printf("%s: file system not clean; please fsck(8)\n", 489 mp->mnt_stat.f_mntfromname); 490 (void) ext2fs_cgupdate(ump, MNT_WAIT); 491 } 492 return (error); 493 494 fail: 495 vrele(devvp); 496 return (error); 497 } 498 499 /* 500 * Reload all incore data for a filesystem (used after running fsck on 501 * the root filesystem and finding things to fix). The filesystem must 502 * be mounted read-only. 503 * 504 * Things to do to update the mount: 505 * 1) invalidate all cached meta-data. 506 * 2) re-read superblock from disk. 507 * 3) re-read summary information from disk. 508 * 4) invalidate all inactive vnodes. 509 * 5) invalidate all cached file data. 510 * 6) re-read inode data for all active vnodes. 511 */ 512 int 513 ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 514 { 515 struct vnode *vp, *devvp; 516 struct inode *ip; 517 struct buf *bp; 518 struct m_ext2fs *fs; 519 struct ext2fs *newfs; 520 int i, error; 521 void *cp; 522 struct ufsmount *ump; 523 struct vnode_iterator *marker; 524 525 if ((mp->mnt_flag & MNT_RDONLY) == 0) 526 return (EINVAL); 527 528 ump = VFSTOUFS(mp); 529 /* 530 * Step 1: invalidate all cached meta-data. 531 */ 532 devvp = ump->um_devvp; 533 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 534 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 535 VOP_UNLOCK(devvp); 536 if (error) 537 panic("ext2fs_reload: dirty1"); 538 539 fs = ump->um_e2fs; 540 /* 541 * Step 2: re-read superblock from disk. Copy in new superblock, and compute 542 * in-memory values. 543 */ 544 error = bread(devvp, SBLOCK, SBSIZE, 0, &bp); 545 if (error) 546 return error; 547 newfs = (struct ext2fs *)bp->b_data; 548 e2fs_sbload(newfs, &fs->e2fs); 549 550 brelse(bp, 0); 551 552 error = ext2fs_sbfill(fs, (mp->mnt_flag & MNT_RDONLY) != 0); 553 if (error) 554 return error; 555 556 /* 557 * Step 3: re-read summary information from disk. 558 */ 559 for (i = 0; i < fs->e2fs_ngdb; i++) { 560 error = bread(devvp , 561 EXT2_FSBTODB(fs, fs->e2fs.e2fs_first_dblock + 562 1 /* superblock */ + i), 563 fs->e2fs_bsize, 0, &bp); 564 if (error) { 565 return (error); 566 } 567 e2fs_cgload((struct ext2_gd *)bp->b_data, 568 &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 569 fs->e2fs_bsize); 570 brelse(bp, 0); 571 } 572 573 vfs_vnode_iterator_init(mp, &marker); 574 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { 575 /* 576 * Step 4: invalidate all inactive vnodes. 577 */ 578 if (vrecycle(vp)) 579 continue; 580 /* 581 * Step 5: invalidate all cached file data. 582 */ 583 if (vn_lock(vp, LK_EXCLUSIVE)) { 584 vrele(vp); 585 continue; 586 } 587 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 588 panic("ext2fs_reload: dirty2"); 589 /* 590 * Step 6: re-read inode data for all active vnodes. 591 */ 592 ip = VTOI(vp); 593 error = bread(devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)), 594 (int)fs->e2fs_bsize, 0, &bp); 595 if (error) { 596 vput(vp); 597 break; 598 } 599 cp = (char *)bp->b_data + 600 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 601 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 602 ext2fs_set_inode_guid(ip); 603 brelse(bp, 0); 604 vput(vp); 605 } 606 vfs_vnode_iterator_destroy(marker); 607 return (error); 608 } 609 610 /* 611 * Common code for mount and mountroot 612 */ 613 int 614 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 615 { 616 struct lwp *l = curlwp; 617 struct ufsmount *ump; 618 struct buf *bp; 619 struct ext2fs *fs; 620 struct m_ext2fs *m_fs; 621 dev_t dev; 622 int error, i, ronly; 623 kauth_cred_t cred; 624 625 dev = devvp->v_rdev; 626 cred = l->l_cred; 627 628 /* Flush out any old buffers remaining from a previous use. */ 629 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 630 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 631 VOP_UNLOCK(devvp); 632 if (error) 633 return (error); 634 635 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 636 637 bp = NULL; 638 ump = NULL; 639 640 /* Read the superblock from disk, and swap it directly. */ 641 error = bread(devvp, SBLOCK, SBSIZE, 0, &bp); 642 if (error) 643 goto out; 644 fs = (struct ext2fs *)bp->b_data; 645 m_fs = kmem_zalloc(sizeof(struct m_ext2fs), KM_SLEEP); 646 e2fs_sbload(fs, &m_fs->e2fs); 647 648 brelse(bp, 0); 649 bp = NULL; 650 651 /* Once swapped, validate and fill in the superblock. */ 652 error = ext2fs_sbfill(m_fs, ronly); 653 if (error) { 654 kmem_free(m_fs, sizeof(struct m_ext2fs)); 655 goto out; 656 } 657 m_fs->e2fs_ronly = ronly; 658 659 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 660 ump->um_fstype = UFS1; 661 ump->um_ops = &ext2fs_ufsops; 662 ump->um_e2fs = m_fs; 663 664 if (ronly == 0) { 665 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 666 m_fs->e2fs.e2fs_state = 0; 667 else 668 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 669 m_fs->e2fs_fmod = 1; 670 } 671 672 /* XXX: should be added in ext2fs_sbfill()? */ 673 m_fs->e2fs_gd = kmem_alloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, KM_SLEEP); 674 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 675 error = bread(devvp, 676 EXT2_FSBTODB(m_fs, m_fs->e2fs.e2fs_first_dblock + 677 1 /* superblock */ + i), 678 m_fs->e2fs_bsize, 0, &bp); 679 if (error) { 680 kmem_free(m_fs->e2fs_gd, 681 m_fs->e2fs_ngdb * m_fs->e2fs_bsize); 682 goto out; 683 } 684 e2fs_cgload((struct ext2_gd *)bp->b_data, 685 &m_fs->e2fs_gd[ 686 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 687 m_fs->e2fs_bsize); 688 brelse(bp, 0); 689 bp = NULL; 690 } 691 692 mp->mnt_data = ump; 693 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 694 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 695 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 696 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 697 mp->mnt_flag |= MNT_LOCAL; 698 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 699 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 700 mp->mnt_iflag |= IMNT_DTYPE; 701 ump->um_flags = 0; 702 ump->um_mountp = mp; 703 ump->um_dev = dev; 704 ump->um_devvp = devvp; 705 ump->um_nindir = EXT2_NINDIR(m_fs); 706 ump->um_lognindir = ffs(EXT2_NINDIR(m_fs)) - 1; 707 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 708 ump->um_seqinc = 1; /* no frags */ 709 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 710 ump->um_dirblksiz = m_fs->e2fs_bsize; 711 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 712 spec_node_setmountedfs(devvp, mp); 713 return (0); 714 715 out: 716 if (bp != NULL) 717 brelse(bp, 0); 718 if (ump) { 719 kmem_free(ump->um_e2fs, sizeof(struct m_ext2fs)); 720 kmem_free(ump, sizeof(*ump)); 721 mp->mnt_data = NULL; 722 } 723 return (error); 724 } 725 726 /* 727 * unmount system call 728 */ 729 int 730 ext2fs_unmount(struct mount *mp, int mntflags) 731 { 732 struct ufsmount *ump; 733 struct m_ext2fs *fs; 734 int error, flags; 735 736 flags = 0; 737 if (mntflags & MNT_FORCE) 738 flags |= FORCECLOSE; 739 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 740 return (error); 741 ump = VFSTOUFS(mp); 742 fs = ump->um_e2fs; 743 if (fs->e2fs_ronly == 0 && 744 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 745 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 746 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 747 (void) ext2fs_sbupdate(ump, MNT_WAIT); 748 } 749 if (ump->um_devvp->v_type != VBAD) 750 spec_node_setmountedfs(ump->um_devvp, NULL); 751 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 752 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 753 NOCRED); 754 vput(ump->um_devvp); 755 kmem_free(fs->e2fs_gd, fs->e2fs_ngdb * fs->e2fs_bsize); 756 kmem_free(fs, sizeof(*fs)); 757 kmem_free(ump, sizeof(*ump)); 758 mp->mnt_data = NULL; 759 mp->mnt_flag &= ~MNT_LOCAL; 760 return (error); 761 } 762 763 /* 764 * Flush out all the files in a filesystem. 765 */ 766 int 767 ext2fs_flushfiles(struct mount *mp, int flags) 768 { 769 extern int doforce; 770 int error; 771 772 if (!doforce) 773 flags &= ~FORCECLOSE; 774 error = vflush(mp, NULLVP, flags); 775 return (error); 776 } 777 778 /* 779 * Get file system statistics. 780 */ 781 int 782 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 783 { 784 struct ufsmount *ump; 785 struct m_ext2fs *fs; 786 uint32_t overhead, overhead_per_group, ngdb; 787 int i, ngroups; 788 789 ump = VFSTOUFS(mp); 790 fs = ump->um_e2fs; 791 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 792 panic("ext2fs_statvfs"); 793 794 /* 795 * Compute the overhead (FS structures) 796 */ 797 overhead_per_group = 798 1 /* block bitmap */ + 799 1 /* inode bitmap */ + 800 fs->e2fs_itpg; 801 overhead = fs->e2fs.e2fs_first_dblock + 802 fs->e2fs_ncg * overhead_per_group; 803 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 804 fs->e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 805 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 806 if (cg_has_sb(i)) 807 ngroups++; 808 } 809 } else { 810 ngroups = fs->e2fs_ncg; 811 } 812 ngdb = fs->e2fs_ngdb; 813 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 814 fs->e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) 815 ngdb += fs->e2fs.e2fs_reserved_ngdb; 816 overhead += ngroups * (1 /* superblock */ + ngdb); 817 818 sbp->f_bsize = fs->e2fs_bsize; 819 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 820 sbp->f_iosize = fs->e2fs_bsize; 821 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 822 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 823 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 824 if (sbp->f_bfree > sbp->f_bresvd) 825 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 826 else 827 sbp->f_bavail = 0; 828 sbp->f_files = fs->e2fs.e2fs_icount; 829 sbp->f_ffree = fs->e2fs.e2fs_ficount; 830 sbp->f_favail = fs->e2fs.e2fs_ficount; 831 sbp->f_fresvd = 0; 832 copy_statvfs_info(sbp, mp); 833 return (0); 834 } 835 836 static bool 837 ext2fs_sync_selector(void *cl, struct vnode *vp) 838 { 839 struct inode *ip; 840 841 ip = VTOI(vp); 842 /* 843 * Skip the vnode/inode if inaccessible. 844 */ 845 if (ip == NULL || vp->v_type == VNON) 846 return false; 847 848 if (((ip->i_flag & 849 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 850 LIST_EMPTY(&vp->v_dirtyblkhd) && 851 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 852 return false; 853 return true; 854 } 855 856 /* 857 * Go through the disk queues to initiate sandbagged IO; 858 * go through the inodes to write those that have been modified; 859 * initiate the writing of the super block if it has been modified. 860 * 861 * Note: we are always called with the filesystem marked `MPBUSY'. 862 */ 863 int 864 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 865 { 866 struct vnode *vp; 867 struct ufsmount *ump = VFSTOUFS(mp); 868 struct m_ext2fs *fs; 869 struct vnode_iterator *marker; 870 int error, allerror = 0; 871 872 fs = ump->um_e2fs; 873 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 874 printf("fs = %s\n", fs->e2fs_fsmnt); 875 panic("update: rofs mod"); 876 } 877 878 /* 879 * Write back each (modified) inode. 880 */ 881 vfs_vnode_iterator_init(mp, &marker); 882 while ((vp = vfs_vnode_iterator_next(marker, ext2fs_sync_selector, 883 NULL))) 884 { 885 error = vn_lock(vp, LK_EXCLUSIVE); 886 if (error) { 887 vrele(vp); 888 continue; 889 } 890 if (vp->v_type == VREG && waitfor == MNT_LAZY) 891 error = ext2fs_update(vp, NULL, NULL, 0); 892 else 893 error = VOP_FSYNC(vp, cred, 894 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 895 if (error) 896 allerror = error; 897 vput(vp); 898 } 899 vfs_vnode_iterator_destroy(marker); 900 /* 901 * Force stale file system control information to be flushed. 902 */ 903 if (waitfor != MNT_LAZY) { 904 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 905 if ((error = VOP_FSYNC(ump->um_devvp, cred, 906 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 907 allerror = error; 908 VOP_UNLOCK(ump->um_devvp); 909 } 910 /* 911 * Write back modified superblock. 912 */ 913 if (fs->e2fs_fmod != 0) { 914 fs->e2fs_fmod = 0; 915 fs->e2fs.e2fs_wtime = time_second; 916 if ((error = ext2fs_cgupdate(ump, waitfor))) 917 allerror = error; 918 } 919 return (allerror); 920 } 921 922 /* 923 * Read an inode from disk and initialize this vnode / inode pair. 924 * Caller assures no other thread will try to load this inode. 925 */ 926 int 927 ext2fs_loadvnode(struct mount *mp, struct vnode *vp, 928 const void *key, size_t key_len, const void **new_key) 929 { 930 ino_t ino; 931 struct m_ext2fs *fs; 932 struct inode *ip; 933 struct ufsmount *ump; 934 struct buf *bp; 935 dev_t dev; 936 int error; 937 void *cp; 938 939 KASSERT(key_len == sizeof(ino)); 940 memcpy(&ino, key, key_len); 941 ump = VFSTOUFS(mp); 942 dev = ump->um_dev; 943 fs = ump->um_e2fs; 944 945 /* Read in the disk contents for the inode, copy into the inode. */ 946 error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)), 947 (int)fs->e2fs_bsize, 0, &bp); 948 if (error) 949 return error; 950 951 /* Allocate and initialize inode. */ 952 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 953 memset(ip, 0, sizeof(struct inode)); 954 vp->v_tag = VT_EXT2FS; 955 vp->v_op = ext2fs_vnodeop_p; 956 vp->v_vflag |= VV_LOCKSWORK; 957 vp->v_data = ip; 958 ip->i_vnode = vp; 959 ip->i_ump = ump; 960 ip->i_e2fs = fs; 961 ip->i_dev = dev; 962 ip->i_number = ino; 963 ip->i_e2fs_last_lblk = 0; 964 ip->i_e2fs_last_blk = 0; 965 966 /* Initialize genfs node. */ 967 genfs_node_init(vp, &ext2fs_genfsops); 968 969 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 970 ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK); 971 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 972 ext2fs_set_inode_guid(ip); 973 brelse(bp, 0); 974 975 /* If the inode was deleted, reset all fields */ 976 if (ip->i_e2fs_dtime != 0) { 977 ip->i_e2fs_mode = 0; 978 (void)ext2fs_setsize(ip, 0); 979 (void)ext2fs_setnblock(ip, 0); 980 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 981 } 982 983 /* Initialize the vnode from the inode. */ 984 ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 985 986 /* Finish inode initialization. */ 987 ip->i_devvp = ump->um_devvp; 988 vref(ip->i_devvp); 989 990 /* 991 * Set up a generation number for this inode if it does not 992 * already have one. This should only happen on old filesystems. 993 */ 994 995 if (ip->i_e2fs_gen == 0) { 996 if (++ext2gennumber < (u_long)time_second) 997 ext2gennumber = time_second; 998 ip->i_e2fs_gen = ext2gennumber; 999 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1000 ip->i_flag |= IN_MODIFIED; 1001 } 1002 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1003 *new_key = &ip->i_number; 1004 return 0; 1005 } 1006 1007 /* 1008 * File handle to vnode 1009 * 1010 * Have to be really careful about stale file handles: 1011 * - check that the inode number is valid 1012 * - call ext2fs_vget() to get the locked inode 1013 * - check for an unallocated inode (i_mode == 0) 1014 */ 1015 int 1016 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1017 { 1018 struct inode *ip; 1019 struct vnode *nvp; 1020 int error; 1021 struct ufid ufh; 1022 struct m_ext2fs *fs; 1023 1024 if (fhp->fid_len != sizeof(struct ufid)) 1025 return EINVAL; 1026 1027 memcpy(&ufh, fhp, sizeof(struct ufid)); 1028 fs = VFSTOUFS(mp)->um_e2fs; 1029 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1030 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1031 return (ESTALE); 1032 1033 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1034 *vpp = NULLVP; 1035 return (error); 1036 } 1037 ip = VTOI(nvp); 1038 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1039 ip->i_e2fs_gen != ufh.ufid_gen) { 1040 vput(nvp); 1041 *vpp = NULLVP; 1042 return (ESTALE); 1043 } 1044 *vpp = nvp; 1045 return (0); 1046 } 1047 1048 /* 1049 * Vnode pointer to File handle 1050 */ 1051 /* ARGSUSED */ 1052 int 1053 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1054 { 1055 struct inode *ip; 1056 struct ufid ufh; 1057 1058 if (*fh_size < sizeof(struct ufid)) { 1059 *fh_size = sizeof(struct ufid); 1060 return E2BIG; 1061 } 1062 *fh_size = sizeof(struct ufid); 1063 1064 ip = VTOI(vp); 1065 memset(&ufh, 0, sizeof(ufh)); 1066 ufh.ufid_len = sizeof(struct ufid); 1067 ufh.ufid_ino = ip->i_number; 1068 ufh.ufid_gen = ip->i_e2fs_gen; 1069 memcpy(fhp, &ufh, sizeof(ufh)); 1070 return (0); 1071 } 1072 1073 /* 1074 * Write a superblock and associated information back to disk. 1075 */ 1076 int 1077 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1078 { 1079 struct m_ext2fs *fs = mp->um_e2fs; 1080 struct buf *bp; 1081 int error = 0; 1082 1083 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1084 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1085 if (waitfor == MNT_WAIT) 1086 error = bwrite(bp); 1087 else 1088 bawrite(bp); 1089 return (error); 1090 } 1091 1092 int 1093 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1094 { 1095 struct m_ext2fs *fs = mp->um_e2fs; 1096 struct buf *bp; 1097 int i, error = 0, allerror = 0; 1098 1099 allerror = ext2fs_sbupdate(mp, waitfor); 1100 for (i = 0; i < fs->e2fs_ngdb; i++) { 1101 bp = getblk(mp->um_devvp, EXT2_FSBTODB(fs, 1102 fs->e2fs.e2fs_first_dblock + 1103 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1104 e2fs_cgsave(&fs->e2fs_gd[ 1105 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1106 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1107 if (waitfor == MNT_WAIT) 1108 error = bwrite(bp); 1109 else 1110 bawrite(bp); 1111 } 1112 1113 if (!allerror && error) 1114 allerror = error; 1115 return (allerror); 1116 } 1117 1118 /* 1119 * Fill in the m_fs structure, and validate the fields of the superblock. 1120 * NOTE: here, the superblock is already swapped. 1121 */ 1122 static int 1123 ext2fs_sbfill(struct m_ext2fs *m_fs, int ronly) 1124 { 1125 uint32_t u32; 1126 struct ext2fs *fs = &m_fs->e2fs; 1127 1128 /* 1129 * General sanity checks 1130 */ 1131 if (fs->e2fs_magic != E2FS_MAGIC) 1132 return EINVAL; 1133 if (fs->e2fs_rev > E2FS_REV1) { 1134 printf("ext2fs: unsupported revision number: %x\n", fs->e2fs_rev); 1135 return EINVAL; 1136 } 1137 if (fs->e2fs_log_bsize > 2) { 1138 /* block size = 1024|2048|4096 */ 1139 printf("ext2fs: bad block size: %d\n", fs->e2fs_log_bsize); 1140 return EINVAL; 1141 } 1142 if (fs->e2fs_bpg == 0) { 1143 printf("ext2fs: zero blocks per group\n"); 1144 return EINVAL; 1145 } 1146 if (fs->e2fs_ipg == 0) { 1147 printf("ext2fs: zero inodes per group\n"); 1148 return EINVAL; 1149 } 1150 1151 if (fs->e2fs_first_dblock >= fs->e2fs_bcount) { 1152 printf("ext2fs: invalid first data block\n"); 1153 return EINVAL; 1154 } 1155 if (fs->e2fs_rbcount > fs->e2fs_bcount || 1156 fs->e2fs_fbcount > fs->e2fs_bcount) { 1157 printf("ext2fs: invalid block count\n"); 1158 return EINVAL; 1159 } 1160 1161 /* 1162 * Revision-specific checks 1163 */ 1164 if (fs->e2fs_rev > E2FS_REV0) { 1165 char buf[256]; 1166 if (fs->e2fs_first_ino != EXT2_FIRSTINO) { 1167 printf("ext2fs: unsupported first inode position\n"); 1168 return EINVAL; 1169 } 1170 u32 = fs->e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP; 1171 if (u32) { 1172 snprintb(buf, sizeof(buf), EXT2F_INCOMPAT_BITS, u32); 1173 printf("ext2fs: unsupported incompat features: %s\n", buf); 1174 return EINVAL; 1175 } 1176 u32 = fs->e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP; 1177 if (!ronly && u32) { 1178 snprintb(buf, sizeof(buf), EXT2F_ROCOMPAT_BITS, u32); 1179 printf("ext2fs: unsupported ro-incompat features: %s\n", 1180 buf); 1181 return EROFS; 1182 } 1183 if (fs->e2fs_inode_size == 0 || !powerof2(fs->e2fs_inode_size)) { 1184 printf("ext2fs: bad inode size\n"); 1185 return EINVAL; 1186 } 1187 } 1188 1189 /* 1190 * Compute the fields of the superblock 1191 */ 1192 u32 = fs->e2fs_bcount - fs->e2fs_first_dblock; /* > 0 */ 1193 m_fs->e2fs_ncg = howmany(u32, fs->e2fs_bpg); 1194 if (m_fs->e2fs_ncg == 0) { 1195 printf("ext2fs: invalid number of cylinder groups\n"); 1196 return EINVAL; 1197 } 1198 1199 m_fs->e2fs_fsbtodb = fs->e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 1200 m_fs->e2fs_bsize = MINBSIZE << fs->e2fs_log_bsize; 1201 m_fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs_log_bsize; 1202 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 1203 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 1204 1205 if ((u32 = m_fs->e2fs_bsize / sizeof(struct ext2_gd)) == 0) { 1206 /* Unlikely to happen */ 1207 printf("ext2fs: invalid block size\n"); 1208 return EINVAL; 1209 } 1210 m_fs->e2fs_ngdb = howmany(m_fs->e2fs_ncg, u32); 1211 if (m_fs->e2fs_ngdb == 0) { 1212 printf("ext2fs: invalid number of group descriptor blocks\n"); 1213 return EINVAL; 1214 } 1215 1216 if (m_fs->e2fs_bsize < EXT2_DINODE_SIZE(m_fs)) { 1217 printf("ext2fs: invalid inode size\n"); 1218 return EINVAL; 1219 } 1220 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 1221 1222 m_fs->e2fs_itpg = fs->e2fs_ipg / m_fs->e2fs_ipb; 1223 1224 return 0; 1225 } 1226