1 /* $NetBSD: ext2fs_vfsops.c,v 1.171 2013/06/23 02:06:05 dholland 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 1.171 2013/06/23 02:06:05 dholland 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/malloc.h> 86 #include <sys/pool.h> 87 #include <sys/lock.h> 88 #include <sys/conf.h> 89 #include <sys/kauth.h> 90 #include <sys/module.h> 91 92 #include <miscfs/genfs/genfs.h> 93 #include <miscfs/specfs/specdev.h> 94 95 #include <ufs/ufs/quota.h> 96 #include <ufs/ufs/ufsmount.h> 97 #include <ufs/ufs/inode.h> 98 #include <ufs/ufs/dir.h> 99 #include <ufs/ufs/ufs_extern.h> 100 101 #include <ufs/ext2fs/ext2fs.h> 102 #include <ufs/ext2fs/ext2fs_dir.h> 103 #include <ufs/ext2fs/ext2fs_extern.h> 104 105 MODULE(MODULE_CLASS_VFS, ext2fs, "ffs"); 106 107 int ext2fs_sbupdate(struct ufsmount *, int); 108 static int ext2fs_checksb(struct ext2fs *, int); 109 110 static struct sysctllog *ext2fs_sysctl_log; 111 112 extern const struct vnodeopv_desc ext2fs_vnodeop_opv_desc; 113 extern const struct vnodeopv_desc ext2fs_specop_opv_desc; 114 extern const struct vnodeopv_desc ext2fs_fifoop_opv_desc; 115 116 const struct vnodeopv_desc * const ext2fs_vnodeopv_descs[] = { 117 &ext2fs_vnodeop_opv_desc, 118 &ext2fs_specop_opv_desc, 119 &ext2fs_fifoop_opv_desc, 120 NULL, 121 }; 122 123 struct vfsops ext2fs_vfsops = { 124 MOUNT_EXT2FS, 125 sizeof (struct ufs_args), 126 ext2fs_mount, 127 ufs_start, 128 ext2fs_unmount, 129 ufs_root, 130 ufs_quotactl, 131 ext2fs_statvfs, 132 ext2fs_sync, 133 ext2fs_vget, 134 ext2fs_fhtovp, 135 ext2fs_vptofh, 136 ext2fs_init, 137 ext2fs_reinit, 138 ext2fs_done, 139 ext2fs_mountroot, 140 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 141 vfs_stdextattrctl, 142 (void *)eopnotsupp, /* vfs_suspendctl */ 143 genfs_renamelock_enter, 144 genfs_renamelock_exit, 145 (void *)eopnotsupp, 146 ext2fs_vnodeopv_descs, 147 0, 148 { NULL, NULL }, 149 }; 150 151 static const struct genfs_ops ext2fs_genfsops = { 152 .gop_size = genfs_size, 153 .gop_alloc = ext2fs_gop_alloc, 154 .gop_write = genfs_gop_write, 155 .gop_markupdate = ufs_gop_markupdate, 156 }; 157 158 static const struct ufs_ops ext2fs_ufsops = { 159 .uo_itimes = ext2fs_itimes, 160 .uo_update = ext2fs_update, 161 .uo_vfree = ext2fs_vfree, 162 .uo_unmark_vnode = (void (*)(vnode_t *))nullop, 163 }; 164 165 /* Fill in the inode uid/gid from ext2 halves. */ 166 void 167 ext2fs_set_inode_guid(struct inode *ip) 168 { 169 170 ip->i_gid = ip->i_e2fs_gid; 171 ip->i_uid = ip->i_e2fs_uid; 172 if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) { 173 ip->i_gid |= ip->i_e2fs_gid_high << 16; 174 ip->i_uid |= ip->i_e2fs_uid_high << 16; 175 } 176 } 177 178 static int 179 ext2fs_modcmd(modcmd_t cmd, void *arg) 180 { 181 int error; 182 183 switch (cmd) { 184 case MODULE_CMD_INIT: 185 error = vfs_attach(&ext2fs_vfsops); 186 if (error != 0) 187 break; 188 sysctl_createv(&ext2fs_sysctl_log, 0, NULL, NULL, 189 CTLFLAG_PERMANENT, 190 CTLTYPE_NODE, "vfs", NULL, 191 NULL, 0, NULL, 0, 192 CTL_VFS, CTL_EOL); 193 sysctl_createv(&ext2fs_sysctl_log, 0, NULL, NULL, 194 CTLFLAG_PERMANENT, 195 CTLTYPE_NODE, "ext2fs", 196 SYSCTL_DESCR("Linux EXT2FS file system"), 197 NULL, 0, NULL, 0, 198 CTL_VFS, 17, CTL_EOL); 199 /* 200 * XXX the "17" above could be dynamic, thereby eliminating 201 * one more instance of the "number to vfs" mapping problem, 202 * but "17" is the order as taken from sys/mount.h 203 */ 204 break; 205 case MODULE_CMD_FINI: 206 error = vfs_detach(&ext2fs_vfsops); 207 if (error != 0) 208 break; 209 sysctl_teardown(&ext2fs_sysctl_log); 210 break; 211 default: 212 error = ENOTTY; 213 break; 214 } 215 216 return (error); 217 } 218 219 /* 220 * XXX Same structure as FFS inodes? Should we share a common pool? 221 */ 222 struct pool ext2fs_inode_pool; 223 struct pool ext2fs_dinode_pool; 224 225 extern u_long ext2gennumber; 226 227 void 228 ext2fs_init(void) 229 { 230 231 pool_init(&ext2fs_inode_pool, sizeof(struct inode), 0, 0, 0, 232 "ext2fsinopl", &pool_allocator_nointr, IPL_NONE); 233 pool_init(&ext2fs_dinode_pool, sizeof(struct ext2fs_dinode), 0, 0, 0, 234 "ext2dinopl", &pool_allocator_nointr, IPL_NONE); 235 ufs_init(); 236 } 237 238 void 239 ext2fs_reinit(void) 240 { 241 ufs_reinit(); 242 } 243 244 void 245 ext2fs_done(void) 246 { 247 248 ufs_done(); 249 pool_destroy(&ext2fs_inode_pool); 250 pool_destroy(&ext2fs_dinode_pool); 251 } 252 253 /* 254 * Called by main() when ext2fs is going to be mounted as root. 255 * 256 * Name is updated by mount(8) after booting. 257 */ 258 #define ROOTNAME "root_device" 259 260 int 261 ext2fs_mountroot(void) 262 { 263 extern struct vnode *rootvp; 264 struct m_ext2fs *fs; 265 struct mount *mp; 266 struct ufsmount *ump; 267 int error; 268 269 if (device_class(root_device) != DV_DISK) 270 return (ENODEV); 271 272 if ((error = vfs_rootmountalloc(MOUNT_EXT2FS, "root_device", &mp))) { 273 vrele(rootvp); 274 return (error); 275 } 276 277 if ((error = ext2fs_mountfs(rootvp, mp)) != 0) { 278 vfs_unbusy(mp, false, NULL); 279 vfs_destroy(mp); 280 return (error); 281 } 282 mutex_enter(&mountlist_lock); 283 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 284 mutex_exit(&mountlist_lock); 285 ump = VFSTOUFS(mp); 286 fs = ump->um_e2fs; 287 memset(fs->e2fs_fsmnt, 0, sizeof(fs->e2fs_fsmnt)); 288 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 289 sizeof(fs->e2fs_fsmnt) - 1, 0); 290 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 291 memset(fs->e2fs.e2fs_fsmnt, 0, sizeof(fs->e2fs.e2fs_fsmnt)); 292 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 293 sizeof(fs->e2fs.e2fs_fsmnt) - 1, 0); 294 } 295 (void)ext2fs_statvfs(mp, &mp->mnt_stat); 296 vfs_unbusy(mp, false, NULL); 297 setrootfstime((time_t)fs->e2fs.e2fs_wtime); 298 return (0); 299 } 300 301 /* 302 * VFS Operations. 303 * 304 * mount system call 305 */ 306 int 307 ext2fs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) 308 { 309 struct lwp *l = curlwp; 310 struct vnode *devvp; 311 struct ufs_args *args = data; 312 struct ufsmount *ump = NULL; 313 struct m_ext2fs *fs; 314 size_t size; 315 int error = 0, flags, update; 316 mode_t accessmode; 317 318 if (*data_len < sizeof *args) 319 return EINVAL; 320 321 if (mp->mnt_flag & MNT_GETARGS) { 322 ump = VFSTOUFS(mp); 323 if (ump == NULL) 324 return EIO; 325 memset(args, 0, sizeof *args); 326 args->fspec = NULL; 327 *data_len = sizeof *args; 328 return 0; 329 } 330 331 update = mp->mnt_flag & MNT_UPDATE; 332 333 /* Check arguments */ 334 if (args->fspec != NULL) { 335 /* 336 * Look up the name and verify that it's sane. 337 */ 338 error = namei_simple_user(args->fspec, 339 NSM_FOLLOW_NOEMULROOT, &devvp); 340 if (error != 0) 341 return (error); 342 343 if (!update) { 344 /* 345 * Be sure this is a valid block device 346 */ 347 if (devvp->v_type != VBLK) 348 error = ENOTBLK; 349 else if (bdevsw_lookup(devvp->v_rdev) == NULL) 350 error = ENXIO; 351 } else { 352 /* 353 * Be sure we're still naming the same device 354 * used for our initial mount 355 */ 356 ump = VFSTOUFS(mp); 357 if (devvp != ump->um_devvp) { 358 if (devvp->v_rdev != ump->um_devvp->v_rdev) 359 error = EINVAL; 360 else { 361 vrele(devvp); 362 devvp = ump->um_devvp; 363 vref(devvp); 364 } 365 } 366 } 367 } else { 368 if (!update) { 369 /* New mounts must have a filename for the device */ 370 return (EINVAL); 371 } else { 372 ump = VFSTOUFS(mp); 373 devvp = ump->um_devvp; 374 vref(devvp); 375 } 376 } 377 378 /* 379 * If mount by non-root, then verify that user has necessary 380 * permissions on the device. 381 * 382 * Permission to update a mount is checked higher, so here we presume 383 * updating the mount is okay (for example, as far as securelevel goes) 384 * which leaves us with the normal check. 385 */ 386 if (error == 0) { 387 accessmode = VREAD; 388 if (update ? 389 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 390 (mp->mnt_flag & MNT_RDONLY) == 0) 391 accessmode |= VWRITE; 392 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 393 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, 394 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, 395 KAUTH_ARG(accessmode)); 396 VOP_UNLOCK(devvp); 397 } 398 399 if (error) { 400 vrele(devvp); 401 return (error); 402 } 403 404 if (!update) { 405 int xflags; 406 407 if (mp->mnt_flag & MNT_RDONLY) 408 xflags = FREAD; 409 else 410 xflags = FREAD|FWRITE; 411 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 412 error = VOP_OPEN(devvp, xflags, FSCRED); 413 VOP_UNLOCK(devvp); 414 if (error) 415 goto fail; 416 error = ext2fs_mountfs(devvp, mp); 417 if (error) { 418 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 419 (void)VOP_CLOSE(devvp, xflags, NOCRED); 420 VOP_UNLOCK(devvp); 421 goto fail; 422 } 423 424 ump = VFSTOUFS(mp); 425 fs = ump->um_e2fs; 426 } else { 427 /* 428 * Update the mount. 429 */ 430 431 /* 432 * The initial mount got a reference on this 433 * device, so drop the one obtained via 434 * namei(), above. 435 */ 436 vrele(devvp); 437 438 ump = VFSTOUFS(mp); 439 fs = ump->um_e2fs; 440 if (fs->e2fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 441 /* 442 * Changing from r/w to r/o 443 */ 444 flags = WRITECLOSE; 445 if (mp->mnt_flag & MNT_FORCE) 446 flags |= FORCECLOSE; 447 error = ext2fs_flushfiles(mp, flags); 448 if (error == 0 && 449 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 450 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 451 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 452 (void) ext2fs_sbupdate(ump, MNT_WAIT); 453 } 454 if (error) 455 return (error); 456 fs->e2fs_ronly = 1; 457 } 458 459 if (mp->mnt_flag & MNT_RELOAD) { 460 error = ext2fs_reload(mp, l->l_cred, l); 461 if (error) 462 return (error); 463 } 464 465 if (fs->e2fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 466 /* 467 * Changing from read-only to read/write 468 */ 469 fs->e2fs_ronly = 0; 470 if (fs->e2fs.e2fs_state == E2FS_ISCLEAN) 471 fs->e2fs.e2fs_state = 0; 472 else 473 fs->e2fs.e2fs_state = E2FS_ERRORS; 474 fs->e2fs_fmod = 1; 475 } 476 if (args->fspec == NULL) 477 return 0; 478 } 479 480 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 481 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 482 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 483 sizeof(fs->e2fs_fsmnt) - 1, &size); 484 memset(fs->e2fs_fsmnt + size, 0, sizeof(fs->e2fs_fsmnt) - size); 485 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 486 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 487 sizeof(fs->e2fs.e2fs_fsmnt) - 1, &size); 488 memset(fs->e2fs.e2fs_fsmnt, 0, 489 sizeof(fs->e2fs.e2fs_fsmnt) - size); 490 } 491 if (fs->e2fs_fmod != 0) { /* XXX */ 492 fs->e2fs_fmod = 0; 493 if (fs->e2fs.e2fs_state == 0) 494 fs->e2fs.e2fs_wtime = time_second; 495 else 496 printf("%s: file system not clean; please fsck(8)\n", 497 mp->mnt_stat.f_mntfromname); 498 (void) ext2fs_cgupdate(ump, MNT_WAIT); 499 } 500 return (error); 501 502 fail: 503 vrele(devvp); 504 return (error); 505 } 506 507 /* 508 * Reload all incore data for a filesystem (used after running fsck on 509 * the root filesystem and finding things to fix). The filesystem must 510 * be mounted read-only. 511 * 512 * Things to do to update the mount: 513 * 1) invalidate all cached meta-data. 514 * 2) re-read superblock from disk. 515 * 3) re-read summary information from disk. 516 * 4) invalidate all inactive vnodes. 517 * 5) invalidate all cached file data. 518 * 6) re-read inode data for all active vnodes. 519 */ 520 int 521 ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 522 { 523 struct vnode *vp, *mvp, *devvp; 524 struct inode *ip; 525 struct buf *bp; 526 struct m_ext2fs *fs; 527 struct ext2fs *newfs; 528 int i, error; 529 void *cp; 530 struct ufsmount *ump; 531 532 if ((mp->mnt_flag & MNT_RDONLY) == 0) 533 return (EINVAL); 534 535 ump = VFSTOUFS(mp); 536 /* 537 * Step 1: invalidate all cached meta-data. 538 */ 539 devvp = ump->um_devvp; 540 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 541 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 542 VOP_UNLOCK(devvp); 543 if (error) 544 panic("ext2fs_reload: dirty1"); 545 /* 546 * Step 2: re-read superblock from disk. 547 */ 548 error = bread(devvp, SBLOCK, SBSIZE, NOCRED, 0, &bp); 549 if (error) { 550 return (error); 551 } 552 newfs = (struct ext2fs *)bp->b_data; 553 error = ext2fs_checksb(newfs, (mp->mnt_flag & MNT_RDONLY) != 0); 554 if (error) { 555 brelse(bp, 0); 556 return (error); 557 } 558 559 fs = ump->um_e2fs; 560 /* 561 * copy in new superblock, and compute in-memory values 562 */ 563 e2fs_sbload(newfs, &fs->e2fs); 564 fs->e2fs_ncg = 565 howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, 566 fs->e2fs.e2fs_bpg); 567 fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 568 fs->e2fs_bsize = MINBSIZE << fs->e2fs.e2fs_log_bsize; 569 fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; 570 fs->e2fs_qbmask = fs->e2fs_bsize - 1; 571 fs->e2fs_bmask = ~fs->e2fs_qbmask; 572 fs->e2fs_ngdb = 573 howmany(fs->e2fs_ncg, fs->e2fs_bsize / sizeof(struct ext2_gd)); 574 fs->e2fs_ipb = fs->e2fs_bsize / EXT2_DINODE_SIZE(fs); 575 fs->e2fs_itpg = fs->e2fs.e2fs_ipg / fs->e2fs_ipb; 576 brelse(bp, 0); 577 578 /* 579 * Step 3: re-read summary information from disk. 580 */ 581 582 for (i = 0; i < fs->e2fs_ngdb; i++) { 583 error = bread(devvp , 584 EXT2_FSBTODB(fs, fs->e2fs.e2fs_first_dblock + 585 1 /* superblock */ + i), 586 fs->e2fs_bsize, NOCRED, 0, &bp); 587 if (error) { 588 return (error); 589 } 590 e2fs_cgload((struct ext2_gd *)bp->b_data, 591 &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 592 fs->e2fs_bsize); 593 brelse(bp, 0); 594 } 595 596 /* Allocate a marker vnode. */ 597 mvp = vnalloc(mp); 598 /* 599 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 600 * and vclean() can be called indirectly 601 */ 602 mutex_enter(&mntvnode_lock); 603 loop: 604 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 605 vmark(mvp, vp); 606 if (vp->v_mount != mp || vismarker(vp)) 607 continue; 608 /* 609 * Step 4: invalidate all inactive vnodes. 610 */ 611 if (vrecycle(vp, &mntvnode_lock, l)) { 612 mutex_enter(&mntvnode_lock); 613 (void)vunmark(mvp); 614 goto loop; 615 } 616 /* 617 * Step 5: invalidate all cached file data. 618 */ 619 mutex_enter(vp->v_interlock); 620 mutex_exit(&mntvnode_lock); 621 if (vget(vp, LK_EXCLUSIVE)) { 622 mutex_enter(&mntvnode_lock); 623 (void)vunmark(mvp); 624 goto loop; 625 } 626 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 627 panic("ext2fs_reload: dirty2"); 628 /* 629 * Step 6: re-read inode data for all active vnodes. 630 */ 631 ip = VTOI(vp); 632 error = bread(devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)), 633 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 634 if (error) { 635 vput(vp); 636 mutex_enter(&mntvnode_lock); 637 (void)vunmark(mvp); 638 break; 639 } 640 cp = (char *)bp->b_data + 641 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 642 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 643 ext2fs_set_inode_guid(ip); 644 brelse(bp, 0); 645 vput(vp); 646 mutex_enter(&mntvnode_lock); 647 } 648 mutex_exit(&mntvnode_lock); 649 vnfree(mvp); 650 return (error); 651 } 652 653 /* 654 * Common code for mount and mountroot 655 */ 656 int 657 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 658 { 659 struct lwp *l = curlwp; 660 struct ufsmount *ump; 661 struct buf *bp; 662 struct ext2fs *fs; 663 struct m_ext2fs *m_fs; 664 dev_t dev; 665 int error, i, ronly; 666 kauth_cred_t cred; 667 668 dev = devvp->v_rdev; 669 cred = l ? l->l_cred : NOCRED; 670 671 /* Flush out any old buffers remaining from a previous use. */ 672 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 673 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 674 VOP_UNLOCK(devvp); 675 if (error) 676 return (error); 677 678 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 679 680 bp = NULL; 681 ump = NULL; 682 683 #ifdef DEBUG_EXT2 684 printf("ext2 sb size: %zu\n", sizeof(struct ext2fs)); 685 #endif 686 error = bread(devvp, SBLOCK, SBSIZE, cred, 0, &bp); 687 if (error) 688 goto out; 689 fs = (struct ext2fs *)bp->b_data; 690 error = ext2fs_checksb(fs, ronly); 691 if (error) 692 goto out; 693 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); 694 ump->um_fstype = UFS1; 695 ump->um_ops = &ext2fs_ufsops; 696 ump->um_e2fs = kmem_zalloc(sizeof(struct m_ext2fs), KM_SLEEP); 697 e2fs_sbload((struct ext2fs *)bp->b_data, &ump->um_e2fs->e2fs); 698 brelse(bp, 0); 699 bp = NULL; 700 m_fs = ump->um_e2fs; 701 m_fs->e2fs_ronly = ronly; 702 703 #ifdef DEBUG_EXT2 704 printf("ext2 ino size %zu\n", EXT2_DINODE_SIZE(m_fs)); 705 #endif 706 if (ronly == 0) { 707 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 708 m_fs->e2fs.e2fs_state = 0; 709 else 710 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 711 m_fs->e2fs_fmod = 1; 712 } 713 714 /* compute dynamic sb infos */ 715 m_fs->e2fs_ncg = 716 howmany(m_fs->e2fs.e2fs_bcount - m_fs->e2fs.e2fs_first_dblock, 717 m_fs->e2fs.e2fs_bpg); 718 m_fs->e2fs_fsbtodb = m_fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 719 m_fs->e2fs_bsize = MINBSIZE << m_fs->e2fs.e2fs_log_bsize; 720 m_fs->e2fs_bshift = LOG_MINBSIZE + m_fs->e2fs.e2fs_log_bsize; 721 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 722 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 723 m_fs->e2fs_ngdb = 724 howmany(m_fs->e2fs_ncg, m_fs->e2fs_bsize / sizeof(struct ext2_gd)); 725 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 726 m_fs->e2fs_itpg = m_fs->e2fs.e2fs_ipg / m_fs->e2fs_ipb; 727 728 m_fs->e2fs_gd = kmem_alloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, KM_SLEEP); 729 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 730 error = bread(devvp , 731 EXT2_FSBTODB(m_fs, m_fs->e2fs.e2fs_first_dblock + 732 1 /* superblock */ + i), 733 m_fs->e2fs_bsize, NOCRED, 0, &bp); 734 if (error) { 735 kmem_free(m_fs->e2fs_gd, 736 m_fs->e2fs_ngdb * m_fs->e2fs_bsize); 737 goto out; 738 } 739 e2fs_cgload((struct ext2_gd *)bp->b_data, 740 &m_fs->e2fs_gd[ 741 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 742 m_fs->e2fs_bsize); 743 brelse(bp, 0); 744 bp = NULL; 745 } 746 747 mp->mnt_data = ump; 748 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 749 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 750 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 751 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 752 mp->mnt_flag |= MNT_LOCAL; 753 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 754 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 755 mp->mnt_iflag |= IMNT_DTYPE; 756 ump->um_flags = 0; 757 ump->um_mountp = mp; 758 ump->um_dev = dev; 759 ump->um_devvp = devvp; 760 ump->um_nindir = EXT2_NINDIR(m_fs); 761 ump->um_lognindir = ffs(EXT2_NINDIR(m_fs)) - 1; 762 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 763 ump->um_seqinc = 1; /* no frags */ 764 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 765 ump->um_dirblksiz = m_fs->e2fs_bsize; 766 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 767 devvp->v_specmountpoint = mp; 768 return (0); 769 770 out: 771 if (bp != NULL) 772 brelse(bp, 0); 773 if (ump) { 774 kmem_free(ump->um_e2fs, sizeof(struct m_ext2fs)); 775 kmem_free(ump, sizeof(*ump)); 776 mp->mnt_data = NULL; 777 } 778 return (error); 779 } 780 781 /* 782 * unmount system call 783 */ 784 int 785 ext2fs_unmount(struct mount *mp, int mntflags) 786 { 787 struct ufsmount *ump; 788 struct m_ext2fs *fs; 789 int error, flags; 790 791 flags = 0; 792 if (mntflags & MNT_FORCE) 793 flags |= FORCECLOSE; 794 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 795 return (error); 796 ump = VFSTOUFS(mp); 797 fs = ump->um_e2fs; 798 if (fs->e2fs_ronly == 0 && 799 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 800 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 801 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 802 (void) ext2fs_sbupdate(ump, MNT_WAIT); 803 } 804 if (ump->um_devvp->v_type != VBAD) 805 ump->um_devvp->v_specmountpoint = NULL; 806 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 807 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 808 NOCRED); 809 vput(ump->um_devvp); 810 kmem_free(fs->e2fs_gd, fs->e2fs_ngdb * fs->e2fs_bsize); 811 kmem_free(fs, sizeof(*fs)); 812 kmem_free(ump, sizeof(*ump)); 813 mp->mnt_data = NULL; 814 mp->mnt_flag &= ~MNT_LOCAL; 815 return (error); 816 } 817 818 /* 819 * Flush out all the files in a filesystem. 820 */ 821 int 822 ext2fs_flushfiles(struct mount *mp, int flags) 823 { 824 extern int doforce; 825 int error; 826 827 if (!doforce) 828 flags &= ~FORCECLOSE; 829 error = vflush(mp, NULLVP, flags); 830 return (error); 831 } 832 833 /* 834 * Get file system statistics. 835 */ 836 int 837 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 838 { 839 struct ufsmount *ump; 840 struct m_ext2fs *fs; 841 uint32_t overhead, overhead_per_group, ngdb; 842 int i, ngroups; 843 844 ump = VFSTOUFS(mp); 845 fs = ump->um_e2fs; 846 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 847 panic("ext2fs_statvfs"); 848 849 /* 850 * Compute the overhead (FS structures) 851 */ 852 overhead_per_group = 853 1 /* block bitmap */ + 854 1 /* inode bitmap */ + 855 fs->e2fs_itpg; 856 overhead = fs->e2fs.e2fs_first_dblock + 857 fs->e2fs_ncg * overhead_per_group; 858 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 859 fs->e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 860 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 861 if (cg_has_sb(i)) 862 ngroups++; 863 } 864 } else { 865 ngroups = fs->e2fs_ncg; 866 } 867 ngdb = fs->e2fs_ngdb; 868 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 869 fs->e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) 870 ngdb += fs->e2fs.e2fs_reserved_ngdb; 871 overhead += ngroups * (1 /* superblock */ + ngdb); 872 873 sbp->f_bsize = fs->e2fs_bsize; 874 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 875 sbp->f_iosize = fs->e2fs_bsize; 876 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 877 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 878 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 879 if (sbp->f_bfree > sbp->f_bresvd) 880 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 881 else 882 sbp->f_bavail = 0; 883 sbp->f_files = fs->e2fs.e2fs_icount; 884 sbp->f_ffree = fs->e2fs.e2fs_ficount; 885 sbp->f_favail = fs->e2fs.e2fs_ficount; 886 sbp->f_fresvd = 0; 887 copy_statvfs_info(sbp, mp); 888 return (0); 889 } 890 891 /* 892 * Go through the disk queues to initiate sandbagged IO; 893 * go through the inodes to write those that have been modified; 894 * initiate the writing of the super block if it has been modified. 895 * 896 * Note: we are always called with the filesystem marked `MPBUSY'. 897 */ 898 int 899 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 900 { 901 struct vnode *vp, *mvp; 902 struct inode *ip; 903 struct ufsmount *ump = VFSTOUFS(mp); 904 struct m_ext2fs *fs; 905 int error, allerror = 0; 906 907 fs = ump->um_e2fs; 908 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 909 printf("fs = %s\n", fs->e2fs_fsmnt); 910 panic("update: rofs mod"); 911 } 912 913 /* Allocate a marker vnode. */ 914 mvp = vnalloc(mp); 915 916 /* 917 * Write back each (modified) inode. 918 */ 919 mutex_enter(&mntvnode_lock); 920 loop: 921 /* 922 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 923 * and vclean() can be called indirectly 924 */ 925 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 926 vmark(mvp, vp); 927 if (vp->v_mount != mp || vismarker(vp)) 928 continue; 929 mutex_enter(vp->v_interlock); 930 ip = VTOI(vp); 931 if (ip == NULL || (vp->v_iflag & (VI_XLOCK|VI_CLEAN)) != 0 || 932 vp->v_type == VNON || 933 ((ip->i_flag & 934 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 935 LIST_EMPTY(&vp->v_dirtyblkhd) && 936 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 937 { 938 mutex_exit(vp->v_interlock); 939 continue; 940 } 941 mutex_exit(&mntvnode_lock); 942 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT); 943 if (error) { 944 mutex_enter(&mntvnode_lock); 945 if (error == ENOENT) { 946 mutex_enter(&mntvnode_lock); 947 (void)vunmark(mvp); 948 goto loop; 949 } 950 continue; 951 } 952 if (vp->v_type == VREG && waitfor == MNT_LAZY) 953 error = ext2fs_update(vp, NULL, NULL, 0); 954 else 955 error = VOP_FSYNC(vp, cred, 956 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 957 if (error) 958 allerror = error; 959 vput(vp); 960 mutex_enter(&mntvnode_lock); 961 } 962 mutex_exit(&mntvnode_lock); 963 vnfree(mvp); 964 /* 965 * Force stale file system control information to be flushed. 966 */ 967 if (waitfor != MNT_LAZY) { 968 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 969 if ((error = VOP_FSYNC(ump->um_devvp, cred, 970 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 971 allerror = error; 972 VOP_UNLOCK(ump->um_devvp); 973 } 974 /* 975 * Write back modified superblock. 976 */ 977 if (fs->e2fs_fmod != 0) { 978 fs->e2fs_fmod = 0; 979 fs->e2fs.e2fs_wtime = time_second; 980 if ((error = ext2fs_cgupdate(ump, waitfor))) 981 allerror = error; 982 } 983 return (allerror); 984 } 985 986 /* 987 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 988 * in from disk. If it is in core, wait for the lock bit to clear, then 989 * return the inode locked. Detection and handling of mount points must be 990 * done by the calling routine. 991 */ 992 int 993 ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 994 { 995 struct m_ext2fs *fs; 996 struct inode *ip; 997 struct ufsmount *ump; 998 struct buf *bp; 999 struct vnode *vp; 1000 dev_t dev; 1001 int error; 1002 void *cp; 1003 1004 ump = VFSTOUFS(mp); 1005 dev = ump->um_dev; 1006 retry: 1007 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1008 return (0); 1009 1010 /* Allocate a new vnode/inode. */ 1011 error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, NULL, &vp); 1012 if (error) { 1013 *vpp = NULL; 1014 return (error); 1015 } 1016 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 1017 1018 mutex_enter(&ufs_hashlock); 1019 if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) { 1020 mutex_exit(&ufs_hashlock); 1021 ungetnewvnode(vp); 1022 pool_put(&ext2fs_inode_pool, ip); 1023 goto retry; 1024 } 1025 1026 vp->v_vflag |= VV_LOCKSWORK; 1027 1028 memset(ip, 0, sizeof(struct inode)); 1029 vp->v_data = ip; 1030 ip->i_vnode = vp; 1031 ip->i_ump = ump; 1032 ip->i_e2fs = fs = ump->um_e2fs; 1033 ip->i_dev = dev; 1034 ip->i_number = ino; 1035 ip->i_e2fs_last_lblk = 0; 1036 ip->i_e2fs_last_blk = 0; 1037 genfs_node_init(vp, &ext2fs_genfsops); 1038 1039 /* 1040 * Put it onto its hash chain and lock it so that other requests for 1041 * this inode will block if they arrive while we are sleeping waiting 1042 * for old data structures to be purged or for the contents of the 1043 * disk portion of this inode to be read. 1044 */ 1045 1046 ufs_ihashins(ip); 1047 mutex_exit(&ufs_hashlock); 1048 1049 /* Read in the disk contents for the inode, copy into the inode. */ 1050 error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)), 1051 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 1052 if (error) { 1053 1054 /* 1055 * The inode does not contain anything useful, so it would 1056 * be misleading to leave it on its hash chain. With mode 1057 * still zero, it will be unlinked and returned to the free 1058 * list by vput(). 1059 */ 1060 1061 vput(vp); 1062 *vpp = NULL; 1063 return (error); 1064 } 1065 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 1066 ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK); 1067 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 1068 ext2fs_set_inode_guid(ip); 1069 brelse(bp, 0); 1070 1071 /* If the inode was deleted, reset all fields */ 1072 if (ip->i_e2fs_dtime != 0) { 1073 ip->i_e2fs_mode = 0; 1074 (void)ext2fs_setsize(ip, 0); 1075 (void)ext2fs_setnblock(ip, 0); 1076 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 1077 } 1078 1079 /* 1080 * Initialize the vnode from the inode, check for aliases. 1081 */ 1082 1083 error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 1084 if (error) { 1085 vput(vp); 1086 *vpp = NULL; 1087 return (error); 1088 } 1089 /* 1090 * Finish inode initialization now that aliasing has been resolved. 1091 */ 1092 1093 ip->i_devvp = ump->um_devvp; 1094 vref(ip->i_devvp); 1095 1096 /* 1097 * Set up a generation number for this inode if it does not 1098 * already have one. This should only happen on old filesystems. 1099 */ 1100 1101 if (ip->i_e2fs_gen == 0) { 1102 if (++ext2gennumber < (u_long)time_second) 1103 ext2gennumber = time_second; 1104 ip->i_e2fs_gen = ext2gennumber; 1105 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1106 ip->i_flag |= IN_MODIFIED; 1107 } 1108 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1109 *vpp = vp; 1110 return (0); 1111 } 1112 1113 /* 1114 * File handle to vnode 1115 * 1116 * Have to be really careful about stale file handles: 1117 * - check that the inode number is valid 1118 * - call ext2fs_vget() to get the locked inode 1119 * - check for an unallocated inode (i_mode == 0) 1120 */ 1121 int 1122 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1123 { 1124 struct inode *ip; 1125 struct vnode *nvp; 1126 int error; 1127 struct ufid ufh; 1128 struct m_ext2fs *fs; 1129 1130 if (fhp->fid_len != sizeof(struct ufid)) 1131 return EINVAL; 1132 1133 memcpy(&ufh, fhp, sizeof(struct ufid)); 1134 fs = VFSTOUFS(mp)->um_e2fs; 1135 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1136 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1137 return (ESTALE); 1138 1139 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1140 *vpp = NULLVP; 1141 return (error); 1142 } 1143 ip = VTOI(nvp); 1144 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1145 ip->i_e2fs_gen != ufh.ufid_gen) { 1146 vput(nvp); 1147 *vpp = NULLVP; 1148 return (ESTALE); 1149 } 1150 *vpp = nvp; 1151 return (0); 1152 } 1153 1154 /* 1155 * Vnode pointer to File handle 1156 */ 1157 /* ARGSUSED */ 1158 int 1159 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1160 { 1161 struct inode *ip; 1162 struct ufid ufh; 1163 1164 if (*fh_size < sizeof(struct ufid)) { 1165 *fh_size = sizeof(struct ufid); 1166 return E2BIG; 1167 } 1168 *fh_size = sizeof(struct ufid); 1169 1170 ip = VTOI(vp); 1171 memset(&ufh, 0, sizeof(ufh)); 1172 ufh.ufid_len = sizeof(struct ufid); 1173 ufh.ufid_ino = ip->i_number; 1174 ufh.ufid_gen = ip->i_e2fs_gen; 1175 memcpy(fhp, &ufh, sizeof(ufh)); 1176 return (0); 1177 } 1178 1179 /* 1180 * Write a superblock and associated information back to disk. 1181 */ 1182 int 1183 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1184 { 1185 struct m_ext2fs *fs = mp->um_e2fs; 1186 struct buf *bp; 1187 int error = 0; 1188 1189 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1190 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1191 if (waitfor == MNT_WAIT) 1192 error = bwrite(bp); 1193 else 1194 bawrite(bp); 1195 return (error); 1196 } 1197 1198 int 1199 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1200 { 1201 struct m_ext2fs *fs = mp->um_e2fs; 1202 struct buf *bp; 1203 int i, error = 0, allerror = 0; 1204 1205 allerror = ext2fs_sbupdate(mp, waitfor); 1206 for (i = 0; i < fs->e2fs_ngdb; i++) { 1207 bp = getblk(mp->um_devvp, EXT2_FSBTODB(fs, 1208 fs->e2fs.e2fs_first_dblock + 1209 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1210 e2fs_cgsave(&fs->e2fs_gd[ 1211 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1212 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1213 if (waitfor == MNT_WAIT) 1214 error = bwrite(bp); 1215 else 1216 bawrite(bp); 1217 } 1218 1219 if (!allerror && error) 1220 allerror = error; 1221 return (allerror); 1222 } 1223 1224 static int 1225 ext2fs_checksb(struct ext2fs *fs, int ronly) 1226 { 1227 uint32_t u32; 1228 1229 if (fs2h16(fs->e2fs_magic) != E2FS_MAGIC) { 1230 return (EINVAL); /* XXX needs translation */ 1231 } 1232 if (fs2h32(fs->e2fs_rev) > E2FS_REV1) { 1233 #ifdef DIAGNOSTIC 1234 printf("ext2fs: unsupported revision number: %x\n", 1235 fs2h32(fs->e2fs_rev)); 1236 #endif 1237 return (EINVAL); /* XXX needs translation */ 1238 } 1239 if (fs2h32(fs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */ 1240 #ifdef DIAGNOSTIC 1241 printf("ext2fs: bad block size: %d " 1242 "(expected <= 2 for ext2 fs)\n", 1243 fs2h32(fs->e2fs_log_bsize)); 1244 #endif 1245 return (EINVAL); /* XXX needs translation */ 1246 } 1247 if (fs2h32(fs->e2fs_rev) > E2FS_REV0) { 1248 char buf[256]; 1249 if (fs2h32(fs->e2fs_first_ino) != EXT2_FIRSTINO) { 1250 printf("ext2fs: unsupported first inode position\n"); 1251 return (EINVAL); /* XXX needs translation */ 1252 } 1253 u32 = fs2h32(fs->e2fs_features_incompat) & ~EXT2F_INCOMPAT_SUPP; 1254 if (u32) { 1255 snprintb(buf, sizeof(buf), EXT2F_INCOMPAT_BITS, u32); 1256 printf("ext2fs: unsupported incompat features: %s\n", 1257 buf); 1258 return EINVAL; /* XXX needs translation */ 1259 } 1260 u32 = fs2h32(fs->e2fs_features_rocompat) & ~EXT2F_ROCOMPAT_SUPP; 1261 if (!ronly && u32) { 1262 snprintb(buf, sizeof(buf), EXT2F_ROCOMPAT_BITS, u32); 1263 printf("ext2fs: unsupported ro-incompat features: %s\n", 1264 buf); 1265 return EROFS; /* XXX needs translation */ 1266 } 1267 } 1268 return (0); 1269 } 1270