1 /* $NetBSD: ext2fs_vfsops.c,v 1.199 2016/08/14 11:44:54 jdolecek 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 1.199 2016/08/14 11:44:54 jdolecek 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; 216 217 extern u_long ext2gennumber; 218 219 void 220 ext2fs_init(void) 221 { 222 223 pool_init(&ext2fs_inode_pool, sizeof(struct inode), 0, 0, 0, 224 "ext2fsinopl", &pool_allocator_nointr, IPL_NONE); 225 ufs_init(); 226 } 227 228 void 229 ext2fs_reinit(void) 230 { 231 ufs_reinit(); 232 } 233 234 void 235 ext2fs_done(void) 236 { 237 238 ufs_done(); 239 pool_destroy(&ext2fs_inode_pool); 240 } 241 242 /* 243 * Called by main() when ext2fs is going to be mounted as root. 244 * 245 * Name is updated by mount(8) after booting. 246 */ 247 248 int 249 ext2fs_mountroot(void) 250 { 251 extern struct vnode *rootvp; 252 struct m_ext2fs *fs; 253 struct mount *mp; 254 struct ufsmount *ump; 255 int error; 256 257 if (device_class(root_device) != DV_DISK) 258 return ENODEV; 259 260 if ((error = vfs_rootmountalloc(MOUNT_EXT2FS, "root_device", &mp))) { 261 vrele(rootvp); 262 return error; 263 } 264 265 if ((error = ext2fs_mountfs(rootvp, mp)) != 0) { 266 vfs_unbusy(mp, false, NULL); 267 vfs_destroy(mp); 268 return error; 269 } 270 mountlist_append(mp); 271 ump = VFSTOUFS(mp); 272 fs = ump->um_e2fs; 273 memset(fs->e2fs_fsmnt, 0, sizeof(fs->e2fs_fsmnt)); 274 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 275 sizeof(fs->e2fs_fsmnt) - 1, 0); 276 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 277 memset(fs->e2fs.e2fs_fsmnt, 0, sizeof(fs->e2fs.e2fs_fsmnt)); 278 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 279 sizeof(fs->e2fs.e2fs_fsmnt) - 1, 0); 280 } 281 (void)ext2fs_statvfs(mp, &mp->mnt_stat); 282 vfs_unbusy(mp, false, NULL); 283 setrootfstime((time_t)fs->e2fs.e2fs_wtime); 284 return 0; 285 } 286 287 /* 288 * VFS Operations. 289 * 290 * mount system call 291 */ 292 int 293 ext2fs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 294 { 295 struct lwp *l = curlwp; 296 struct vnode *devvp; 297 struct ufs_args *args = data; 298 struct ufsmount *ump = NULL; 299 struct m_ext2fs *fs; 300 size_t size; 301 int error = 0, flags, update; 302 mode_t accessmode; 303 304 if (args == NULL) 305 return EINVAL; 306 if (*data_len < sizeof *args) 307 return EINVAL; 308 309 if (mp->mnt_flag & MNT_GETARGS) { 310 ump = VFSTOUFS(mp); 311 if (ump == NULL) 312 return EIO; 313 memset(args, 0, sizeof *args); 314 args->fspec = NULL; 315 *data_len = sizeof *args; 316 return 0; 317 } 318 319 update = mp->mnt_flag & MNT_UPDATE; 320 321 /* Check arguments */ 322 if (args->fspec != NULL) { 323 /* 324 * Look up the name and verify that it's sane. 325 */ 326 error = namei_simple_user(args->fspec, 327 NSM_FOLLOW_NOEMULROOT, &devvp); 328 if (error != 0) 329 return error; 330 331 if (!update) { 332 /* 333 * Be sure this is a valid block device 334 */ 335 if (devvp->v_type != VBLK) 336 error = ENOTBLK; 337 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 338 error = ENXIO; 339 } else { 340 /* 341 * Be sure we're still naming the same device 342 * used for our initial mount 343 */ 344 ump = VFSTOUFS(mp); 345 if (devvp != ump->um_devvp) { 346 if (devvp->v_rdev != ump->um_devvp->v_rdev) 347 error = EINVAL; 348 else { 349 vrele(devvp); 350 devvp = ump->um_devvp; 351 vref(devvp); 352 } 353 } 354 } 355 } else { 356 if (!update) { 357 /* New mounts must have a filename for the device */ 358 return EINVAL; 359 } else { 360 ump = VFSTOUFS(mp); 361 devvp = ump->um_devvp; 362 vref(devvp); 363 } 364 } 365 366 /* 367 * If mount by non-root, then verify that user has necessary 368 * permissions on the device. 369 * 370 * Permission to update a mount is checked higher, so here we presume 371 * updating the mount is okay (for example, as far as securelevel goes) 372 * which leaves us with the normal check. 373 */ 374 if (error == 0) { 375 accessmode = VREAD; 376 if (update ? 377 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 378 (mp->mnt_flag & MNT_RDONLY) == 0) 379 accessmode |= VWRITE; 380 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 381 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 382 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 383 KAUTH_ARG(accessmode)); 384 VOP_UNLOCK(devvp); 385 } 386 387 if (error) { 388 vrele(devvp); 389 return error; 390 } 391 392 if (!update) { 393 int xflags; 394 395 if (mp->mnt_flag & MNT_RDONLY) 396 xflags = FREAD; 397 else 398 xflags = FREAD|FWRITE; 399 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 400 error = VOP_OPEN(devvp, xflags, FSCRED); 401 VOP_UNLOCK(devvp); 402 if (error) 403 goto fail; 404 error = ext2fs_mountfs(devvp, mp); 405 if (error) { 406 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 407 (void)VOP_CLOSE(devvp, xflags, NOCRED); 408 VOP_UNLOCK(devvp); 409 goto fail; 410 } 411 412 ump = VFSTOUFS(mp); 413 fs = ump->um_e2fs; 414 } else { 415 /* 416 * Update the mount. 417 */ 418 419 /* 420 * The initial mount got a reference on this 421 * device, so drop the one obtained via 422 * namei(), above. 423 */ 424 vrele(devvp); 425 426 ump = VFSTOUFS(mp); 427 fs = ump->um_e2fs; 428 if (fs->e2fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 429 /* 430 * Changing from r/w to r/o 431 */ 432 flags = WRITECLOSE; 433 if (mp->mnt_flag & MNT_FORCE) 434 flags |= FORCECLOSE; 435 error = ext2fs_flushfiles(mp, flags); 436 if (error == 0 && 437 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 438 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 439 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 440 (void) ext2fs_sbupdate(ump, MNT_WAIT); 441 } 442 if (error) 443 return error; 444 fs->e2fs_ronly = 1; 445 } 446 447 if (mp->mnt_flag & MNT_RELOAD) { 448 error = ext2fs_reload(mp, l->l_cred, l); 449 if (error) 450 return error; 451 } 452 453 if (fs->e2fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 454 /* 455 * Changing from read-only to read/write 456 */ 457 fs->e2fs_ronly = 0; 458 if (fs->e2fs.e2fs_state == E2FS_ISCLEAN) 459 fs->e2fs.e2fs_state = 0; 460 else 461 fs->e2fs.e2fs_state = E2FS_ERRORS; 462 fs->e2fs_fmod = 1; 463 } 464 if (args->fspec == NULL) 465 return 0; 466 } 467 468 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 469 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 470 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 471 sizeof(fs->e2fs_fsmnt) - 1, &size); 472 memset(fs->e2fs_fsmnt + size, 0, sizeof(fs->e2fs_fsmnt) - size); 473 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 474 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 475 sizeof(fs->e2fs.e2fs_fsmnt) - 1, &size); 476 memset(fs->e2fs.e2fs_fsmnt, 0, 477 sizeof(fs->e2fs.e2fs_fsmnt) - size); 478 } 479 if (fs->e2fs_fmod != 0) { /* XXX */ 480 fs->e2fs_fmod = 0; 481 if (fs->e2fs.e2fs_state == 0) 482 fs->e2fs.e2fs_wtime = time_second; 483 else 484 printf("%s: file system not clean; please fsck(8)\n", 485 mp->mnt_stat.f_mntfromname); 486 (void) ext2fs_cgupdate(ump, MNT_WAIT); 487 } 488 return error; 489 490 fail: 491 vrele(devvp); 492 return error; 493 } 494 495 /* 496 * 497 */ 498 static int 499 ext2fs_loadvnode_content(struct m_ext2fs *fs, ino_t ino, struct buf *bp, struct inode *ip) 500 { 501 struct ext2fs_dinode *din; 502 void *cp; 503 int error = 0; 504 505 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 506 din = kmem_alloc(EXT2_DINODE_SIZE(fs), KM_SLEEP); 507 e2fs_iload((struct ext2fs_dinode *)cp, din, EXT2_DINODE_SIZE(fs)); 508 509 /* sanity checks */ 510 if (EXT2_DINODE_FITS(din, e2di_extra_isize, EXT2_DINODE_SIZE(fs)) 511 && (EXT2_DINODE_SIZE(fs) - EXT2_REV0_DINODE_SIZE) < din->e2di_extra_isize) 512 { 513 printf("ext2fs: inode %"PRIu64" bad extra_isize %u", 514 ino, din->e2di_extra_isize); 515 error = EINVAL; 516 goto bad; 517 } 518 519 /* replace old dinode; assumes new dinode size is same as old one */ 520 if (ip->i_din.e2fs_din) 521 kmem_free(ip->i_din.e2fs_din, EXT2_DINODE_SIZE(fs)); 522 ip->i_din.e2fs_din = din; 523 524 ext2fs_set_inode_guid(ip); 525 return error; 526 527 bad: 528 kmem_free(din, EXT2_DINODE_SIZE(fs)); 529 return error; 530 } 531 532 /* 533 * Reload all incore data for a filesystem (used after running fsck on 534 * the root filesystem and finding things to fix). The filesystem must 535 * be mounted read-only. 536 * 537 * Things to do to update the mount: 538 * 1) invalidate all cached meta-data. 539 * 2) re-read superblock from disk. 540 * 3) re-read summary information from disk. 541 * 4) invalidate all inactive vnodes. 542 * 5) invalidate all cached file data. 543 * 6) re-read inode data for all active vnodes. 544 */ 545 int 546 ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 547 { 548 struct vnode *vp, *devvp; 549 struct inode *ip; 550 struct buf *bp; 551 struct m_ext2fs *fs; 552 struct ext2fs *newfs; 553 int i, error; 554 struct ufsmount *ump; 555 struct vnode_iterator *marker; 556 557 if ((mp->mnt_flag & MNT_RDONLY) == 0) 558 return EINVAL; 559 560 ump = VFSTOUFS(mp); 561 /* 562 * Step 1: invalidate all cached meta-data. 563 */ 564 devvp = ump->um_devvp; 565 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 566 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 567 VOP_UNLOCK(devvp); 568 if (error) 569 panic("ext2fs_reload: dirty1"); 570 571 fs = ump->um_e2fs; 572 /* 573 * Step 2: re-read superblock from disk. Copy in new superblock, and compute 574 * in-memory values. 575 */ 576 error = bread(devvp, SBLOCK, SBSIZE, 0, &bp); 577 if (error) 578 return error; 579 newfs = (struct ext2fs *)bp->b_data; 580 e2fs_sbload(newfs, &fs->e2fs); 581 582 brelse(bp, 0); 583 584 error = ext2fs_sbfill(fs, (mp->mnt_flag & MNT_RDONLY) != 0); 585 if (error) 586 return error; 587 588 /* 589 * Step 3: re-read summary information from disk. 590 */ 591 for (i = 0; i < fs->e2fs_ngdb; i++) { 592 error = bread(devvp , 593 EXT2_FSBTODB(fs, fs->e2fs.e2fs_first_dblock + 594 1 /* superblock */ + i), 595 fs->e2fs_bsize, 0, &bp); 596 if (error) { 597 return error; 598 } 599 e2fs_cgload((struct ext2_gd *)bp->b_data, 600 &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 601 fs->e2fs_bsize); 602 brelse(bp, 0); 603 } 604 605 vfs_vnode_iterator_init(mp, &marker); 606 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { 607 /* 608 * Step 4: invalidate all inactive vnodes. 609 */ 610 if (vrecycle(vp)) 611 continue; 612 /* 613 * Step 5: invalidate all cached file data. 614 */ 615 if (vn_lock(vp, LK_EXCLUSIVE)) { 616 vrele(vp); 617 continue; 618 } 619 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 620 panic("ext2fs_reload: dirty2"); 621 /* 622 * Step 6: re-read inode data for all active vnodes. 623 */ 624 ip = VTOI(vp); 625 error = bread(devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)), 626 (int)fs->e2fs_bsize, 0, &bp); 627 if (error) { 628 vput(vp); 629 break; 630 } 631 error = ext2fs_loadvnode_content(fs, ip->i_number, bp, ip); 632 brelse(bp, 0); 633 if (error) { 634 vput(vp); 635 break; 636 } 637 638 vput(vp); 639 } 640 vfs_vnode_iterator_destroy(marker); 641 return error; 642 } 643 644 /* 645 * Common code for mount and mountroot 646 */ 647 int 648 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 649 { 650 struct lwp *l = curlwp; 651 struct ufsmount *ump; 652 struct buf *bp; 653 struct ext2fs *fs; 654 struct m_ext2fs *m_fs; 655 dev_t dev; 656 int error, i, ronly; 657 kauth_cred_t cred; 658 659 dev = devvp->v_rdev; 660 cred = l->l_cred; 661 662 /* Flush out any old buffers remaining from a previous use. */ 663 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 664 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 665 VOP_UNLOCK(devvp); 666 if (error) 667 return error; 668 669 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 670 671 bp = NULL; 672 ump = NULL; 673 674 /* Read the superblock from disk, and swap it directly. */ 675 error = bread(devvp, SBLOCK, SBSIZE, 0, &bp); 676 if (error) 677 goto out; 678 fs = (struct ext2fs *)bp->b_data; 679 m_fs = kmem_zalloc(sizeof(struct m_ext2fs), KM_SLEEP); 680 e2fs_sbload(fs, &m_fs->e2fs); 681 682 brelse(bp, 0); 683 bp = NULL; 684 685 /* Once swapped, validate and fill in the superblock. */ 686 error = ext2fs_sbfill(m_fs, ronly); 687 if (error) { 688 kmem_free(m_fs, sizeof(struct m_ext2fs)); 689 goto out; 690 } 691 m_fs->e2fs_ronly = ronly; 692 693 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 694 ump->um_fstype = UFS1; 695 ump->um_ops = &ext2fs_ufsops; 696 ump->um_e2fs = m_fs; 697 698 if (ronly == 0) { 699 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 700 m_fs->e2fs.e2fs_state = 0; 701 else 702 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 703 m_fs->e2fs_fmod = 1; 704 } 705 706 /* XXX: should be added in ext2fs_sbfill()? */ 707 m_fs->e2fs_gd = kmem_alloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, KM_SLEEP); 708 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 709 error = bread(devvp, 710 EXT2_FSBTODB(m_fs, m_fs->e2fs.e2fs_first_dblock + 711 1 /* superblock */ + i), 712 m_fs->e2fs_bsize, 0, &bp); 713 if (error) { 714 kmem_free(m_fs->e2fs_gd, 715 m_fs->e2fs_ngdb * m_fs->e2fs_bsize); 716 goto out; 717 } 718 e2fs_cgload((struct ext2_gd *)bp->b_data, 719 &m_fs->e2fs_gd[ 720 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 721 m_fs->e2fs_bsize); 722 brelse(bp, 0); 723 bp = NULL; 724 } 725 726 mp->mnt_data = ump; 727 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 728 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 729 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 730 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 731 mp->mnt_flag |= MNT_LOCAL; 732 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 733 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 734 mp->mnt_iflag |= IMNT_DTYPE; 735 ump->um_flags = 0; 736 ump->um_mountp = mp; 737 ump->um_dev = dev; 738 ump->um_devvp = devvp; 739 ump->um_nindir = EXT2_NINDIR(m_fs); 740 ump->um_lognindir = ffs(EXT2_NINDIR(m_fs)) - 1; 741 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 742 ump->um_seqinc = 1; /* no frags */ 743 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 744 ump->um_dirblksiz = m_fs->e2fs_bsize; 745 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 746 spec_node_setmountedfs(devvp, mp); 747 return 0; 748 749 out: 750 if (bp != NULL) 751 brelse(bp, 0); 752 if (ump) { 753 kmem_free(ump->um_e2fs, sizeof(struct m_ext2fs)); 754 kmem_free(ump, sizeof(*ump)); 755 mp->mnt_data = NULL; 756 } 757 return error; 758 } 759 760 /* 761 * unmount system call 762 */ 763 int 764 ext2fs_unmount(struct mount *mp, int mntflags) 765 { 766 struct ufsmount *ump; 767 struct m_ext2fs *fs; 768 int error, flags; 769 770 flags = 0; 771 if (mntflags & MNT_FORCE) 772 flags |= FORCECLOSE; 773 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 774 return error; 775 ump = VFSTOUFS(mp); 776 fs = ump->um_e2fs; 777 if (fs->e2fs_ronly == 0 && 778 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 779 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 780 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 781 (void) ext2fs_sbupdate(ump, MNT_WAIT); 782 } 783 if (ump->um_devvp->v_type != VBAD) 784 spec_node_setmountedfs(ump->um_devvp, NULL); 785 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 786 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 787 NOCRED); 788 vput(ump->um_devvp); 789 kmem_free(fs->e2fs_gd, fs->e2fs_ngdb * fs->e2fs_bsize); 790 kmem_free(fs, sizeof(*fs)); 791 kmem_free(ump, sizeof(*ump)); 792 mp->mnt_data = NULL; 793 mp->mnt_flag &= ~MNT_LOCAL; 794 return error; 795 } 796 797 /* 798 * Flush out all the files in a filesystem. 799 */ 800 int 801 ext2fs_flushfiles(struct mount *mp, int flags) 802 { 803 extern int doforce; 804 int error; 805 806 if (!doforce) 807 flags &= ~FORCECLOSE; 808 error = vflush(mp, NULLVP, flags); 809 return error; 810 } 811 812 /* 813 * Get file system statistics. 814 */ 815 int 816 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 817 { 818 struct ufsmount *ump; 819 struct m_ext2fs *fs; 820 uint32_t overhead, overhead_per_group, ngdb; 821 int i, ngroups; 822 823 ump = VFSTOUFS(mp); 824 fs = ump->um_e2fs; 825 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 826 panic("ext2fs_statvfs"); 827 828 /* 829 * Compute the overhead (FS structures) 830 */ 831 overhead_per_group = 832 1 /* block bitmap */ + 833 1 /* inode bitmap */ + 834 fs->e2fs_itpg; 835 overhead = fs->e2fs.e2fs_first_dblock + 836 fs->e2fs_ncg * overhead_per_group; 837 if (EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_SPARSESUPER)) { 838 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 839 if (cg_has_sb(i)) 840 ngroups++; 841 } 842 } else { 843 ngroups = fs->e2fs_ncg; 844 } 845 ngdb = fs->e2fs_ngdb; 846 if (EXT2F_HAS_COMPAT_FEATURE(fs, EXT2F_COMPAT_RESIZE)) 847 ngdb += fs->e2fs.e2fs_reserved_ngdb; 848 overhead += ngroups * (1 /* superblock */ + ngdb); 849 850 sbp->f_bsize = fs->e2fs_bsize; 851 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 852 sbp->f_iosize = fs->e2fs_bsize; 853 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 854 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 855 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 856 if (sbp->f_bfree > sbp->f_bresvd) 857 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 858 else 859 sbp->f_bavail = 0; 860 sbp->f_files = fs->e2fs.e2fs_icount; 861 sbp->f_ffree = fs->e2fs.e2fs_ficount; 862 sbp->f_favail = fs->e2fs.e2fs_ficount; 863 sbp->f_fresvd = 0; 864 copy_statvfs_info(sbp, mp); 865 return 0; 866 } 867 868 static bool 869 ext2fs_sync_selector(void *cl, struct vnode *vp) 870 { 871 struct inode *ip; 872 873 ip = VTOI(vp); 874 /* 875 * Skip the vnode/inode if inaccessible. 876 */ 877 if (ip == NULL || vp->v_type == VNON) 878 return false; 879 880 if (((ip->i_flag & 881 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 882 LIST_EMPTY(&vp->v_dirtyblkhd) && 883 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 884 return false; 885 return true; 886 } 887 888 /* 889 * Go through the disk queues to initiate sandbagged IO; 890 * go through the inodes to write those that have been modified; 891 * initiate the writing of the super block if it has been modified. 892 * 893 * Note: we are always called with the filesystem marked `MPBUSY'. 894 */ 895 int 896 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 897 { 898 struct vnode *vp; 899 struct ufsmount *ump = VFSTOUFS(mp); 900 struct m_ext2fs *fs; 901 struct vnode_iterator *marker; 902 int error, allerror = 0; 903 904 fs = ump->um_e2fs; 905 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 906 printf("fs = %s\n", fs->e2fs_fsmnt); 907 panic("update: rofs mod"); 908 } 909 910 /* 911 * Write back each (modified) inode. 912 */ 913 vfs_vnode_iterator_init(mp, &marker); 914 while ((vp = vfs_vnode_iterator_next(marker, ext2fs_sync_selector, 915 NULL))) 916 { 917 error = vn_lock(vp, LK_EXCLUSIVE); 918 if (error) { 919 vrele(vp); 920 continue; 921 } 922 if (vp->v_type == VREG && waitfor == MNT_LAZY) 923 error = ext2fs_update(vp, NULL, NULL, 0); 924 else 925 error = VOP_FSYNC(vp, cred, 926 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 927 if (error) 928 allerror = error; 929 vput(vp); 930 } 931 vfs_vnode_iterator_destroy(marker); 932 /* 933 * Force stale file system control information to be flushed. 934 */ 935 if (waitfor != MNT_LAZY) { 936 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 937 if ((error = VOP_FSYNC(ump->um_devvp, cred, 938 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 939 allerror = error; 940 VOP_UNLOCK(ump->um_devvp); 941 } 942 /* 943 * Write back modified superblock. 944 */ 945 if (fs->e2fs_fmod != 0) { 946 fs->e2fs_fmod = 0; 947 fs->e2fs.e2fs_wtime = time_second; 948 if ((error = ext2fs_cgupdate(ump, waitfor))) 949 allerror = error; 950 } 951 return allerror; 952 } 953 954 /* 955 * Read an inode from disk and initialize this vnode / inode pair. 956 * Caller assures no other thread will try to load this inode. 957 */ 958 int 959 ext2fs_loadvnode(struct mount *mp, struct vnode *vp, 960 const void *key, size_t key_len, const void **new_key) 961 { 962 ino_t ino; 963 struct m_ext2fs *fs; 964 struct inode *ip; 965 struct ufsmount *ump; 966 struct buf *bp; 967 dev_t dev; 968 int error; 969 970 KASSERT(key_len == sizeof(ino)); 971 memcpy(&ino, key, key_len); 972 ump = VFSTOUFS(mp); 973 dev = ump->um_dev; 974 fs = ump->um_e2fs; 975 976 /* Read in the disk contents for the inode, copy into the inode. */ 977 error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)), 978 (int)fs->e2fs_bsize, 0, &bp); 979 if (error) 980 return error; 981 982 /* Allocate and initialize inode. */ 983 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 984 memset(ip, 0, sizeof(struct inode)); 985 vp->v_tag = VT_EXT2FS; 986 vp->v_op = ext2fs_vnodeop_p; 987 vp->v_vflag |= VV_LOCKSWORK; 988 vp->v_data = ip; 989 ip->i_vnode = vp; 990 ip->i_ump = ump; 991 ip->i_e2fs = fs; 992 ip->i_dev = dev; 993 ip->i_number = ino; 994 ip->i_e2fs_last_lblk = 0; 995 ip->i_e2fs_last_blk = 0; 996 997 /* Initialize genfs node. */ 998 genfs_node_init(vp, &ext2fs_genfsops); 999 1000 error = ext2fs_loadvnode_content(fs, ino, bp, ip); 1001 brelse(bp, 0); 1002 if (error) 1003 return error; 1004 1005 /* If the inode was deleted, reset all fields */ 1006 if (ip->i_e2fs_dtime != 0) { 1007 ip->i_e2fs_mode = 0; 1008 (void)ext2fs_setsize(ip, 0); 1009 (void)ext2fs_setnblock(ip, 0); 1010 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 1011 } 1012 1013 /* Initialize the vnode from the inode. */ 1014 ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 1015 1016 /* Finish inode initialization. */ 1017 ip->i_devvp = ump->um_devvp; 1018 vref(ip->i_devvp); 1019 1020 /* 1021 * Set up a generation number for this inode if it does not 1022 * already have one. This should only happen on old filesystems. 1023 */ 1024 1025 if (ip->i_e2fs_gen == 0) { 1026 if (++ext2gennumber < (u_long)time_second) 1027 ext2gennumber = time_second; 1028 ip->i_e2fs_gen = ext2gennumber; 1029 if ((mp->mnt_flag & MNT_RDONLY) == 0) 1030 ip->i_flag |= IN_MODIFIED; 1031 } 1032 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1033 *new_key = &ip->i_number; 1034 return 0; 1035 } 1036 1037 /* 1038 * File handle to vnode 1039 * 1040 * Have to be really careful about stale file handles: 1041 * - check that the inode number is valid 1042 * - call ext2fs_vget() to get the locked inode 1043 * - check for an unallocated inode (i_mode == 0) 1044 */ 1045 int 1046 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1047 { 1048 struct inode *ip; 1049 struct vnode *nvp; 1050 int error; 1051 struct ufid ufh; 1052 struct m_ext2fs *fs; 1053 1054 if (fhp->fid_len != sizeof(struct ufid)) 1055 return EINVAL; 1056 1057 memcpy(&ufh, fhp, sizeof(struct ufid)); 1058 fs = VFSTOUFS(mp)->um_e2fs; 1059 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1060 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1061 return ESTALE; 1062 1063 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1064 *vpp = NULLVP; 1065 return error; 1066 } 1067 ip = VTOI(nvp); 1068 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1069 ip->i_e2fs_gen != ufh.ufid_gen) { 1070 vput(nvp); 1071 *vpp = NULLVP; 1072 return ESTALE; 1073 } 1074 *vpp = nvp; 1075 return 0; 1076 } 1077 1078 /* 1079 * Vnode pointer to File handle 1080 */ 1081 /* ARGSUSED */ 1082 int 1083 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1084 { 1085 struct inode *ip; 1086 struct ufid ufh; 1087 1088 if (*fh_size < sizeof(struct ufid)) { 1089 *fh_size = sizeof(struct ufid); 1090 return E2BIG; 1091 } 1092 *fh_size = sizeof(struct ufid); 1093 1094 ip = VTOI(vp); 1095 memset(&ufh, 0, sizeof(ufh)); 1096 ufh.ufid_len = sizeof(struct ufid); 1097 ufh.ufid_ino = ip->i_number; 1098 ufh.ufid_gen = ip->i_e2fs_gen; 1099 memcpy(fhp, &ufh, sizeof(ufh)); 1100 return 0; 1101 } 1102 1103 /* 1104 * Write a superblock and associated information back to disk. 1105 */ 1106 int 1107 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1108 { 1109 struct m_ext2fs *fs = mp->um_e2fs; 1110 struct buf *bp; 1111 int error = 0; 1112 1113 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1114 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1115 if (waitfor == MNT_WAIT) 1116 error = bwrite(bp); 1117 else 1118 bawrite(bp); 1119 return error; 1120 } 1121 1122 int 1123 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1124 { 1125 struct m_ext2fs *fs = mp->um_e2fs; 1126 struct buf *bp; 1127 int i, error = 0, allerror = 0; 1128 1129 allerror = ext2fs_sbupdate(mp, waitfor); 1130 for (i = 0; i < fs->e2fs_ngdb; i++) { 1131 bp = getblk(mp->um_devvp, EXT2_FSBTODB(fs, 1132 fs->e2fs.e2fs_first_dblock + 1133 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1134 e2fs_cgsave(&fs->e2fs_gd[ 1135 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1136 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1137 if (waitfor == MNT_WAIT) 1138 error = bwrite(bp); 1139 else 1140 bawrite(bp); 1141 } 1142 1143 if (!allerror && error) 1144 allerror = error; 1145 return allerror; 1146 } 1147 1148 /* 1149 * Fill in the m_fs structure, and validate the fields of the superblock. 1150 * NOTE: here, the superblock is already swapped. 1151 */ 1152 static int 1153 ext2fs_sbfill(struct m_ext2fs *m_fs, int ronly) 1154 { 1155 uint32_t u32; 1156 struct ext2fs *fs = &m_fs->e2fs; 1157 1158 /* 1159 * General sanity checks 1160 */ 1161 if (fs->e2fs_magic != E2FS_MAGIC) 1162 return EINVAL; 1163 if (fs->e2fs_rev > E2FS_REV1) { 1164 printf("ext2fs: unsupported revision number: %x\n", fs->e2fs_rev); 1165 return EINVAL; 1166 } 1167 if (fs->e2fs_log_bsize > 2) { 1168 /* block size = 1024|2048|4096 */ 1169 printf("ext2fs: bad block size: %d\n", fs->e2fs_log_bsize); 1170 return EINVAL; 1171 } 1172 if (fs->e2fs_bpg == 0) { 1173 printf("ext2fs: zero blocks per group\n"); 1174 return EINVAL; 1175 } 1176 if (fs->e2fs_ipg == 0) { 1177 printf("ext2fs: zero inodes per group\n"); 1178 return EINVAL; 1179 } 1180 1181 if (fs->e2fs_first_dblock >= fs->e2fs_bcount) { 1182 printf("ext2fs: invalid first data block\n"); 1183 return EINVAL; 1184 } 1185 if (fs->e2fs_rbcount > fs->e2fs_bcount || 1186 fs->e2fs_fbcount > fs->e2fs_bcount) { 1187 printf("ext2fs: invalid block count\n"); 1188 return EINVAL; 1189 } 1190 1191 /* 1192 * Compute the fields of the superblock 1193 */ 1194 u32 = fs->e2fs_bcount - fs->e2fs_first_dblock; /* > 0 */ 1195 m_fs->e2fs_ncg = howmany(u32, fs->e2fs_bpg); 1196 if (m_fs->e2fs_ncg == 0) { 1197 printf("ext2fs: invalid number of cylinder groups\n"); 1198 return EINVAL; 1199 } 1200 1201 m_fs->e2fs_fsbtodb = fs->e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 1202 m_fs->e2fs_bsize = MINBSIZE << fs->e2fs_log_bsize; 1203 m_fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs_log_bsize; 1204 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 1205 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 1206 1207 if ((u32 = m_fs->e2fs_bsize / sizeof(struct ext2_gd)) == 0) { 1208 /* Unlikely to happen */ 1209 printf("ext2fs: invalid block size\n"); 1210 return EINVAL; 1211 } 1212 m_fs->e2fs_ngdb = howmany(m_fs->e2fs_ncg, u32); 1213 if (m_fs->e2fs_ngdb == 0) { 1214 printf("ext2fs: invalid number of group descriptor blocks\n"); 1215 return EINVAL; 1216 } 1217 1218 if (m_fs->e2fs_bsize < EXT2_DINODE_SIZE(m_fs)) { 1219 printf("ext2fs: invalid inode size\n"); 1220 return EINVAL; 1221 } 1222 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 1223 1224 m_fs->e2fs_itpg = fs->e2fs_ipg / m_fs->e2fs_ipb; 1225 1226 /* 1227 * Revision-specific checks 1228 */ 1229 if (fs->e2fs_rev > E2FS_REV0) { 1230 char buf[256]; 1231 if (fs->e2fs_first_ino != EXT2_FIRSTINO) { 1232 printf("ext2fs: unsupported first inode position\n"); 1233 return EINVAL; 1234 } 1235 u32 = fs->e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP; 1236 if (u32) { 1237 snprintb(buf, sizeof(buf), EXT2F_INCOMPAT_BITS, u32); 1238 printf("ext2fs: unsupported incompat features: %s\n", buf); 1239 #ifndef EXT2_IGNORE_INCOMPAT_FEATURES 1240 return EINVAL; 1241 #endif 1242 } 1243 u32 = fs->e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP; 1244 if (!ronly && u32) { 1245 snprintb(buf, sizeof(buf), EXT2F_ROCOMPAT_BITS, u32); 1246 printf("ext2fs: unsupported ro-incompat features: %s\n", 1247 buf); 1248 #ifndef EXT2_IGNORE_ROCOMPAT_FEATURES 1249 return EROFS; 1250 #endif 1251 } 1252 if (fs->e2fs_inode_size == 0 || !powerof2(fs->e2fs_inode_size) || fs->e2fs_inode_size > m_fs->e2fs_bsize) { 1253 printf("ext2fs: bad inode size\n"); 1254 return EINVAL; 1255 } 1256 } 1257 1258 return 0; 1259 } 1260