1 /* $NetBSD: ext2fs_vfsops.c,v 1.159 2010/07/27 05:15:56 jakllsch 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 1.159 2010/07/27 05:15:56 jakllsch 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 = genfs_can_mount(devvp, accessmode, l->l_cred); 394 VOP_UNLOCK(devvp); 395 } 396 397 if (error) { 398 vrele(devvp); 399 return (error); 400 } 401 402 if (!update) { 403 int xflags; 404 405 if (mp->mnt_flag & MNT_RDONLY) 406 xflags = FREAD; 407 else 408 xflags = FREAD|FWRITE; 409 error = VOP_OPEN(devvp, xflags, FSCRED); 410 if (error) 411 goto fail; 412 error = ext2fs_mountfs(devvp, mp); 413 if (error) { 414 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 415 (void)VOP_CLOSE(devvp, xflags, NOCRED); 416 VOP_UNLOCK(devvp); 417 goto fail; 418 } 419 420 ump = VFSTOUFS(mp); 421 fs = ump->um_e2fs; 422 } else { 423 /* 424 * Update the mount. 425 */ 426 427 /* 428 * The initial mount got a reference on this 429 * device, so drop the one obtained via 430 * namei(), above. 431 */ 432 vrele(devvp); 433 434 ump = VFSTOUFS(mp); 435 fs = ump->um_e2fs; 436 if (fs->e2fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 437 /* 438 * Changing from r/w to r/o 439 */ 440 flags = WRITECLOSE; 441 if (mp->mnt_flag & MNT_FORCE) 442 flags |= FORCECLOSE; 443 error = ext2fs_flushfiles(mp, flags); 444 if (error == 0 && 445 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 446 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 447 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 448 (void) ext2fs_sbupdate(ump, MNT_WAIT); 449 } 450 if (error) 451 return (error); 452 fs->e2fs_ronly = 1; 453 } 454 455 if (mp->mnt_flag & MNT_RELOAD) { 456 error = ext2fs_reload(mp, l->l_cred, l); 457 if (error) 458 return (error); 459 } 460 461 if (fs->e2fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { 462 /* 463 * Changing from read-only to read/write 464 */ 465 fs->e2fs_ronly = 0; 466 if (fs->e2fs.e2fs_state == E2FS_ISCLEAN) 467 fs->e2fs.e2fs_state = 0; 468 else 469 fs->e2fs.e2fs_state = E2FS_ERRORS; 470 fs->e2fs_fmod = 1; 471 } 472 if (args->fspec == NULL) 473 return 0; 474 } 475 476 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 477 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 478 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs_fsmnt, 479 sizeof(fs->e2fs_fsmnt) - 1, &size); 480 memset(fs->e2fs_fsmnt + size, 0, sizeof(fs->e2fs_fsmnt) - size); 481 if (fs->e2fs.e2fs_rev > E2FS_REV0) { 482 (void) copystr(mp->mnt_stat.f_mntonname, fs->e2fs.e2fs_fsmnt, 483 sizeof(fs->e2fs.e2fs_fsmnt) - 1, &size); 484 memset(fs->e2fs.e2fs_fsmnt, 0, 485 sizeof(fs->e2fs.e2fs_fsmnt) - size); 486 } 487 if (fs->e2fs_fmod != 0) { /* XXX */ 488 fs->e2fs_fmod = 0; 489 if (fs->e2fs.e2fs_state == 0) 490 fs->e2fs.e2fs_wtime = time_second; 491 else 492 printf("%s: file system not clean; please fsck(8)\n", 493 mp->mnt_stat.f_mntfromname); 494 (void) ext2fs_cgupdate(ump, MNT_WAIT); 495 } 496 return (error); 497 498 fail: 499 vrele(devvp); 500 return (error); 501 } 502 503 /* 504 * Reload all incore data for a filesystem (used after running fsck on 505 * the root filesystem and finding things to fix). The filesystem must 506 * be mounted read-only. 507 * 508 * Things to do to update the mount: 509 * 1) invalidate all cached meta-data. 510 * 2) re-read superblock from disk. 511 * 3) re-read summary information from disk. 512 * 4) invalidate all inactive vnodes. 513 * 5) invalidate all cached file data. 514 * 6) re-read inode data for all active vnodes. 515 */ 516 int 517 ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l) 518 { 519 struct vnode *vp, *mvp, *devvp; 520 struct inode *ip; 521 struct buf *bp; 522 struct m_ext2fs *fs; 523 struct ext2fs *newfs; 524 int i, error; 525 void *cp; 526 struct ufsmount *ump; 527 528 if ((mp->mnt_flag & MNT_RDONLY) == 0) 529 return (EINVAL); 530 531 ump = VFSTOUFS(mp); 532 /* 533 * Step 1: invalidate all cached meta-data. 534 */ 535 devvp = ump->um_devvp; 536 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 537 error = vinvalbuf(devvp, 0, cred, l, 0, 0); 538 VOP_UNLOCK(devvp); 539 if (error) 540 panic("ext2fs_reload: dirty1"); 541 /* 542 * Step 2: re-read superblock from disk. 543 */ 544 error = bread(devvp, SBLOCK, SBSIZE, NOCRED, 0, &bp); 545 if (error) { 546 brelse(bp, 0); 547 return (error); 548 } 549 newfs = (struct ext2fs *)bp->b_data; 550 error = ext2fs_checksb(newfs, (mp->mnt_flag & MNT_RDONLY) != 0); 551 if (error) { 552 brelse(bp, 0); 553 return (error); 554 } 555 556 fs = ump->um_e2fs; 557 /* 558 * copy in new superblock, and compute in-memory values 559 */ 560 e2fs_sbload(newfs, &fs->e2fs); 561 fs->e2fs_ncg = 562 howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, 563 fs->e2fs.e2fs_bpg); 564 fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 565 fs->e2fs_bsize = MINBSIZE << fs->e2fs.e2fs_log_bsize; 566 fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; 567 fs->e2fs_qbmask = fs->e2fs_bsize - 1; 568 fs->e2fs_bmask = ~fs->e2fs_qbmask; 569 fs->e2fs_ngdb = 570 howmany(fs->e2fs_ncg, fs->e2fs_bsize / sizeof(struct ext2_gd)); 571 fs->e2fs_ipb = fs->e2fs_bsize / EXT2_DINODE_SIZE(fs); 572 fs->e2fs_itpg = fs->e2fs.e2fs_ipg / fs->e2fs_ipb; 573 brelse(bp, 0); 574 575 /* 576 * Step 3: re-read summary information from disk. 577 */ 578 579 for (i = 0; i < fs->e2fs_ngdb; i++) { 580 error = bread(devvp , 581 fsbtodb(fs, fs->e2fs.e2fs_first_dblock + 582 1 /* superblock */ + i), 583 fs->e2fs_bsize, NOCRED, 0, &bp); 584 if (error) { 585 brelse(bp, 0); 586 return (error); 587 } 588 e2fs_cgload((struct ext2_gd *)bp->b_data, 589 &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 590 fs->e2fs_bsize); 591 brelse(bp, 0); 592 } 593 594 /* Allocate a marker vnode. */ 595 if ((mvp = vnalloc(mp)) == NULL) 596 return ENOMEM; 597 /* 598 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 599 * and vclean() can be called indirectly 600 */ 601 mutex_enter(&mntvnode_lock); 602 loop: 603 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 604 vmark(mvp, vp); 605 if (vp->v_mount != mp || vismarker(vp)) 606 continue; 607 /* 608 * Step 4: invalidate all inactive vnodes. 609 */ 610 if (vrecycle(vp, &mntvnode_lock, l)) { 611 mutex_enter(&mntvnode_lock); 612 (void)vunmark(mvp); 613 goto loop; 614 } 615 /* 616 * Step 5: invalidate all cached file data. 617 */ 618 mutex_enter(&vp->v_interlock); 619 mutex_exit(&mntvnode_lock); 620 if (vget(vp, LK_EXCLUSIVE)) { 621 mutex_enter(&mntvnode_lock); 622 (void)vunmark(mvp); 623 goto loop; 624 } 625 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 626 panic("ext2fs_reload: dirty2"); 627 /* 628 * Step 6: re-read inode data for all active vnodes. 629 */ 630 ip = VTOI(vp); 631 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 632 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 633 if (error) { 634 vput(vp); 635 mutex_enter(&mntvnode_lock); 636 (void)vunmark(mvp); 637 break; 638 } 639 cp = (char *)bp->b_data + 640 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 641 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 642 ext2fs_set_inode_guid(ip); 643 brelse(bp, 0); 644 vput(vp); 645 mutex_enter(&mntvnode_lock); 646 } 647 mutex_exit(&mntvnode_lock); 648 vnfree(mvp); 649 return (error); 650 } 651 652 /* 653 * Common code for mount and mountroot 654 */ 655 int 656 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 657 { 658 struct lwp *l = curlwp; 659 struct ufsmount *ump; 660 struct buf *bp; 661 struct ext2fs *fs; 662 struct m_ext2fs *m_fs; 663 dev_t dev; 664 int error, i, ronly; 665 kauth_cred_t cred; 666 struct proc *p; 667 668 dev = devvp->v_rdev; 669 p = l ? l->l_proc : NULL; 670 cred = l ? l->l_cred : NOCRED; 671 672 /* Flush out any old buffers remaining from a previous use. */ 673 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 674 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 675 VOP_UNLOCK(devvp); 676 if (error) 677 return (error); 678 679 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 680 681 bp = NULL; 682 ump = NULL; 683 684 #ifdef DEBUG_EXT2 685 printf("ext2 sb size: %zu\n", sizeof(struct ext2fs)); 686 #endif 687 error = bread(devvp, SBLOCK, SBSIZE, cred, 0, &bp); 688 if (error) 689 goto out; 690 fs = (struct ext2fs *)bp->b_data; 691 error = ext2fs_checksb(fs, ronly); 692 if (error) 693 goto out; 694 ump = malloc(sizeof(*ump), M_UFSMNT, M_WAITOK); 695 memset(ump, 0, sizeof(*ump)); 696 ump->um_fstype = UFS1; 697 ump->um_ops = &ext2fs_ufsops; 698 ump->um_e2fs = malloc(sizeof(struct m_ext2fs), M_UFSMNT, M_WAITOK); 699 memset(ump->um_e2fs, 0, sizeof(struct m_ext2fs)); 700 e2fs_sbload((struct ext2fs *)bp->b_data, &ump->um_e2fs->e2fs); 701 brelse(bp, 0); 702 bp = NULL; 703 m_fs = ump->um_e2fs; 704 m_fs->e2fs_ronly = ronly; 705 706 #ifdef DEBUG_EXT2 707 printf("ext2 ino size %zu\n", EXT2_DINODE_SIZE(m_fs)); 708 #endif 709 if (ronly == 0) { 710 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 711 m_fs->e2fs.e2fs_state = 0; 712 else 713 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 714 m_fs->e2fs_fmod = 1; 715 } 716 717 /* compute dynamic sb infos */ 718 m_fs->e2fs_ncg = 719 howmany(m_fs->e2fs.e2fs_bcount - m_fs->e2fs.e2fs_first_dblock, 720 m_fs->e2fs.e2fs_bpg); 721 m_fs->e2fs_fsbtodb = m_fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 722 m_fs->e2fs_bsize = MINBSIZE << m_fs->e2fs.e2fs_log_bsize; 723 m_fs->e2fs_bshift = LOG_MINBSIZE + m_fs->e2fs.e2fs_log_bsize; 724 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 725 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 726 m_fs->e2fs_ngdb = 727 howmany(m_fs->e2fs_ncg, m_fs->e2fs_bsize / sizeof(struct ext2_gd)); 728 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 729 m_fs->e2fs_itpg = m_fs->e2fs.e2fs_ipg / m_fs->e2fs_ipb; 730 731 m_fs->e2fs_gd = malloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, 732 M_UFSMNT, M_WAITOK); 733 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 734 error = bread(devvp , 735 fsbtodb(m_fs, m_fs->e2fs.e2fs_first_dblock + 736 1 /* superblock */ + i), 737 m_fs->e2fs_bsize, NOCRED, 0, &bp); 738 if (error) { 739 free(m_fs->e2fs_gd, M_UFSMNT); 740 goto out; 741 } 742 e2fs_cgload((struct ext2_gd *)bp->b_data, 743 &m_fs->e2fs_gd[ 744 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 745 m_fs->e2fs_bsize); 746 brelse(bp, 0); 747 bp = NULL; 748 } 749 750 mp->mnt_data = ump; 751 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 752 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 753 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 754 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 755 mp->mnt_flag |= MNT_LOCAL; 756 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 757 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 758 mp->mnt_iflag |= IMNT_DTYPE; 759 ump->um_flags = 0; 760 ump->um_mountp = mp; 761 ump->um_dev = dev; 762 ump->um_devvp = devvp; 763 ump->um_nindir = NINDIR(m_fs); 764 ump->um_lognindir = ffs(NINDIR(m_fs)) - 1; 765 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 766 ump->um_seqinc = 1; /* no frags */ 767 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 768 ump->um_dirblksiz = m_fs->e2fs_bsize; 769 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 770 devvp->v_specmountpoint = mp; 771 return (0); 772 773 out: 774 KASSERT(bp != NULL); 775 brelse(bp, 0); 776 if (ump) { 777 free(ump->um_e2fs, M_UFSMNT); 778 free(ump, M_UFSMNT); 779 mp->mnt_data = NULL; 780 } 781 return (error); 782 } 783 784 /* 785 * unmount system call 786 */ 787 int 788 ext2fs_unmount(struct mount *mp, int mntflags) 789 { 790 struct ufsmount *ump; 791 struct m_ext2fs *fs; 792 int error, flags; 793 794 flags = 0; 795 if (mntflags & MNT_FORCE) 796 flags |= FORCECLOSE; 797 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 798 return (error); 799 ump = VFSTOUFS(mp); 800 fs = ump->um_e2fs; 801 if (fs->e2fs_ronly == 0 && 802 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 803 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 804 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 805 (void) ext2fs_sbupdate(ump, MNT_WAIT); 806 } 807 if (ump->um_devvp->v_type != VBAD) 808 ump->um_devvp->v_specmountpoint = NULL; 809 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 810 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 811 NOCRED); 812 vput(ump->um_devvp); 813 free(fs->e2fs_gd, M_UFSMNT); 814 free(fs, M_UFSMNT); 815 free(ump, M_UFSMNT); 816 mp->mnt_data = NULL; 817 mp->mnt_flag &= ~MNT_LOCAL; 818 return (error); 819 } 820 821 /* 822 * Flush out all the files in a filesystem. 823 */ 824 int 825 ext2fs_flushfiles(struct mount *mp, int flags) 826 { 827 extern int doforce; 828 int error; 829 830 if (!doforce) 831 flags &= ~FORCECLOSE; 832 error = vflush(mp, NULLVP, flags); 833 return (error); 834 } 835 836 /* 837 * Get file system statistics. 838 */ 839 int 840 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 841 { 842 struct ufsmount *ump; 843 struct m_ext2fs *fs; 844 uint32_t overhead, overhead_per_group, ngdb; 845 int i, ngroups; 846 847 ump = VFSTOUFS(mp); 848 fs = ump->um_e2fs; 849 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 850 panic("ext2fs_statvfs"); 851 852 /* 853 * Compute the overhead (FS structures) 854 */ 855 overhead_per_group = 856 1 /* block bitmap */ + 857 1 /* inode bitmap */ + 858 fs->e2fs_itpg; 859 overhead = fs->e2fs.e2fs_first_dblock + 860 fs->e2fs_ncg * overhead_per_group; 861 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 862 fs->e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 863 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 864 if (cg_has_sb(i)) 865 ngroups++; 866 } 867 } else { 868 ngroups = fs->e2fs_ncg; 869 } 870 ngdb = fs->e2fs_ngdb; 871 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 872 fs->e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) 873 ngdb += fs->e2fs.e2fs_reserved_ngdb; 874 overhead += ngroups * (1 /* superblock */ + ngdb); 875 876 sbp->f_bsize = fs->e2fs_bsize; 877 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 878 sbp->f_iosize = fs->e2fs_bsize; 879 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 880 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 881 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 882 if (sbp->f_bfree > sbp->f_bresvd) 883 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 884 else 885 sbp->f_bavail = 0; 886 sbp->f_files = fs->e2fs.e2fs_icount; 887 sbp->f_ffree = fs->e2fs.e2fs_ficount; 888 sbp->f_favail = fs->e2fs.e2fs_ficount; 889 sbp->f_fresvd = 0; 890 copy_statvfs_info(sbp, mp); 891 return (0); 892 } 893 894 /* 895 * Go through the disk queues to initiate sandbagged IO; 896 * go through the inodes to write those that have been modified; 897 * initiate the writing of the super block if it has been modified. 898 * 899 * Note: we are always called with the filesystem marked `MPBUSY'. 900 */ 901 int 902 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 903 { 904 struct vnode *vp, *mvp; 905 struct inode *ip; 906 struct ufsmount *ump = VFSTOUFS(mp); 907 struct m_ext2fs *fs; 908 int error, allerror = 0; 909 910 fs = ump->um_e2fs; 911 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 912 printf("fs = %s\n", fs->e2fs_fsmnt); 913 panic("update: rofs mod"); 914 } 915 916 /* Allocate a marker vnode. */ 917 if ((mvp = vnalloc(mp)) == NULL) 918 return (ENOMEM); 919 920 /* 921 * Write back each (modified) inode. 922 */ 923 mutex_enter(&mntvnode_lock); 924 loop: 925 /* 926 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 927 * and vclean() can be called indirectly 928 */ 929 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 930 vmark(mvp, vp); 931 if (vp->v_mount != mp || vismarker(vp)) 932 continue; 933 mutex_enter(&vp->v_interlock); 934 ip = VTOI(vp); 935 if (ip == NULL || (vp->v_iflag & (VI_XLOCK|VI_CLEAN)) != 0 || 936 vp->v_type == VNON || 937 ((ip->i_flag & 938 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 939 LIST_EMPTY(&vp->v_dirtyblkhd) && 940 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 941 { 942 mutex_exit(&vp->v_interlock); 943 continue; 944 } 945 mutex_exit(&mntvnode_lock); 946 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT); 947 if (error) { 948 mutex_enter(&mntvnode_lock); 949 if (error == ENOENT) { 950 mutex_enter(&mntvnode_lock); 951 (void)vunmark(mvp); 952 goto loop; 953 } 954 continue; 955 } 956 if (vp->v_type == VREG && waitfor == MNT_LAZY) 957 error = ext2fs_update(vp, NULL, NULL, 0); 958 else 959 error = VOP_FSYNC(vp, cred, 960 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 961 if (error) 962 allerror = error; 963 vput(vp); 964 mutex_enter(&mntvnode_lock); 965 } 966 mutex_exit(&mntvnode_lock); 967 vnfree(mvp); 968 /* 969 * Force stale file system control information to be flushed. 970 */ 971 if (waitfor != MNT_LAZY) { 972 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 973 if ((error = VOP_FSYNC(ump->um_devvp, cred, 974 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 975 allerror = error; 976 VOP_UNLOCK(ump->um_devvp); 977 } 978 /* 979 * Write back modified superblock. 980 */ 981 if (fs->e2fs_fmod != 0) { 982 fs->e2fs_fmod = 0; 983 fs->e2fs.e2fs_wtime = time_second; 984 if ((error = ext2fs_cgupdate(ump, waitfor))) 985 allerror = error; 986 } 987 return (allerror); 988 } 989 990 /* 991 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 992 * in from disk. If it is in core, wait for the lock bit to clear, then 993 * return the inode locked. Detection and handling of mount points must be 994 * done by the calling routine. 995 */ 996 int 997 ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 998 { 999 struct m_ext2fs *fs; 1000 struct inode *ip; 1001 struct ufsmount *ump; 1002 struct buf *bp; 1003 struct vnode *vp; 1004 dev_t dev; 1005 int error; 1006 void *cp; 1007 1008 ump = VFSTOUFS(mp); 1009 dev = ump->um_dev; 1010 retry: 1011 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1012 return (0); 1013 1014 /* Allocate a new vnode/inode. */ 1015 if ((error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, &vp)) != 0) { 1016 *vpp = NULL; 1017 return (error); 1018 } 1019 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 1020 1021 mutex_enter(&ufs_hashlock); 1022 if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) { 1023 mutex_exit(&ufs_hashlock); 1024 ungetnewvnode(vp); 1025 pool_put(&ext2fs_inode_pool, ip); 1026 goto retry; 1027 } 1028 1029 vp->v_vflag |= VV_LOCKSWORK; 1030 1031 memset(ip, 0, sizeof(struct inode)); 1032 vp->v_data = ip; 1033 ip->i_vnode = vp; 1034 ip->i_ump = ump; 1035 ip->i_e2fs = fs = ump->um_e2fs; 1036 ip->i_dev = dev; 1037 ip->i_number = ino; 1038 ip->i_e2fs_last_lblk = 0; 1039 ip->i_e2fs_last_blk = 0; 1040 genfs_node_init(vp, &ext2fs_genfsops); 1041 1042 /* 1043 * Put it onto its hash chain and lock it so that other requests for 1044 * this inode will block if they arrive while we are sleeping waiting 1045 * for old data structures to be purged or for the contents of the 1046 * disk portion of this inode to be read. 1047 */ 1048 1049 ufs_ihashins(ip); 1050 mutex_exit(&ufs_hashlock); 1051 1052 /* Read in the disk contents for the inode, copy into the inode. */ 1053 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1054 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 1055 if (error) { 1056 1057 /* 1058 * The inode does not contain anything useful, so it would 1059 * be misleading to leave it on its hash chain. With mode 1060 * still zero, it will be unlinked and returned to the free 1061 * list by vput(). 1062 */ 1063 1064 vput(vp); 1065 brelse(bp, 0); 1066 *vpp = NULL; 1067 return (error); 1068 } 1069 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 1070 ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK); 1071 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 1072 ext2fs_set_inode_guid(ip); 1073 brelse(bp, 0); 1074 1075 /* If the inode was deleted, reset all fields */ 1076 if (ip->i_e2fs_dtime != 0) { 1077 ip->i_e2fs_mode = ip->i_e2fs_nblock = 0; 1078 (void)ext2fs_setsize(ip, 0); 1079 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 1080 } 1081 1082 /* 1083 * Initialize the vnode from the inode, check for aliases. 1084 */ 1085 1086 error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 1087 if (error) { 1088 vput(vp); 1089 *vpp = NULL; 1090 return (error); 1091 } 1092 /* 1093 * Finish inode initialization now that aliasing has been resolved. 1094 */ 1095 1096 ip->i_devvp = ump->um_devvp; 1097 vref(ip->i_devvp); 1098 1099 /* 1100 * Set up a generation number for this inode if it does not 1101 * already have one. This should only happen on old filesystems. 1102 */ 1103 1104 if (ip->i_e2fs_gen == 0) { 1105 if (++ext2gennumber < (u_long)time_second) 1106 ext2gennumber = time_second; 1107 ip->i_e2fs_gen = ext2gennumber; 1108 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1109 ip->i_flag |= IN_MODIFIED; 1110 } 1111 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1112 *vpp = vp; 1113 return (0); 1114 } 1115 1116 /* 1117 * File handle to vnode 1118 * 1119 * Have to be really careful about stale file handles: 1120 * - check that the inode number is valid 1121 * - call ext2fs_vget() to get the locked inode 1122 * - check for an unallocated inode (i_mode == 0) 1123 */ 1124 int 1125 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1126 { 1127 struct inode *ip; 1128 struct vnode *nvp; 1129 int error; 1130 struct ufid ufh; 1131 struct m_ext2fs *fs; 1132 1133 if (fhp->fid_len != sizeof(struct ufid)) 1134 return EINVAL; 1135 1136 memcpy(&ufh, fhp, sizeof(struct ufid)); 1137 fs = VFSTOUFS(mp)->um_e2fs; 1138 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1139 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1140 return (ESTALE); 1141 1142 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1143 *vpp = NULLVP; 1144 return (error); 1145 } 1146 ip = VTOI(nvp); 1147 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1148 ip->i_e2fs_gen != ufh.ufid_gen) { 1149 vput(nvp); 1150 *vpp = NULLVP; 1151 return (ESTALE); 1152 } 1153 *vpp = nvp; 1154 return (0); 1155 } 1156 1157 /* 1158 * Vnode pointer to File handle 1159 */ 1160 /* ARGSUSED */ 1161 int 1162 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1163 { 1164 struct inode *ip; 1165 struct ufid ufh; 1166 1167 if (*fh_size < sizeof(struct ufid)) { 1168 *fh_size = sizeof(struct ufid); 1169 return E2BIG; 1170 } 1171 *fh_size = sizeof(struct ufid); 1172 1173 ip = VTOI(vp); 1174 memset(&ufh, 0, sizeof(ufh)); 1175 ufh.ufid_len = sizeof(struct ufid); 1176 ufh.ufid_ino = ip->i_number; 1177 ufh.ufid_gen = ip->i_e2fs_gen; 1178 memcpy(fhp, &ufh, sizeof(ufh)); 1179 return (0); 1180 } 1181 1182 /* 1183 * Write a superblock and associated information back to disk. 1184 */ 1185 int 1186 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1187 { 1188 struct m_ext2fs *fs = mp->um_e2fs; 1189 struct buf *bp; 1190 int error = 0; 1191 1192 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1193 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1194 if (waitfor == MNT_WAIT) 1195 error = bwrite(bp); 1196 else 1197 bawrite(bp); 1198 return (error); 1199 } 1200 1201 int 1202 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1203 { 1204 struct m_ext2fs *fs = mp->um_e2fs; 1205 struct buf *bp; 1206 int i, error = 0, allerror = 0; 1207 1208 allerror = ext2fs_sbupdate(mp, waitfor); 1209 for (i = 0; i < fs->e2fs_ngdb; i++) { 1210 bp = getblk(mp->um_devvp, fsbtodb(fs, 1211 fs->e2fs.e2fs_first_dblock + 1212 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1213 e2fs_cgsave(&fs->e2fs_gd[ 1214 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1215 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1216 if (waitfor == MNT_WAIT) 1217 error = bwrite(bp); 1218 else 1219 bawrite(bp); 1220 } 1221 1222 if (!allerror && error) 1223 allerror = error; 1224 return (allerror); 1225 } 1226 1227 static int 1228 ext2fs_checksb(struct ext2fs *fs, int ronly) 1229 { 1230 1231 if (fs2h16(fs->e2fs_magic) != E2FS_MAGIC) { 1232 return (EINVAL); /* XXX needs translation */ 1233 } 1234 if (fs2h32(fs->e2fs_rev) > E2FS_REV1) { 1235 #ifdef DIAGNOSTIC 1236 printf("Ext2 fs: unsupported revision number: %x\n", 1237 fs2h32(fs->e2fs_rev)); 1238 #endif 1239 return (EINVAL); /* XXX needs translation */ 1240 } 1241 if (fs2h32(fs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */ 1242 #ifdef DIAGNOSTIC 1243 printf("Ext2 fs: bad block size: %d " 1244 "(expected <= 2 for ext2 fs)\n", 1245 fs2h32(fs->e2fs_log_bsize)); 1246 #endif 1247 return (EINVAL); /* XXX needs translation */ 1248 } 1249 if (fs2h32(fs->e2fs_rev) > E2FS_REV0) { 1250 if (fs2h32(fs->e2fs_first_ino) != EXT2_FIRSTINO) { 1251 printf("Ext2 fs: unsupported first inode position\n"); 1252 return (EINVAL); /* XXX needs translation */ 1253 } 1254 if (fs2h32(fs->e2fs_features_incompat) & 1255 ~EXT2F_INCOMPAT_SUPP) { 1256 printf("Ext2 fs: unsupported optional feature\n"); 1257 return (EINVAL); /* XXX needs translation */ 1258 } 1259 if (!ronly && fs2h32(fs->e2fs_features_rocompat) & 1260 ~EXT2F_ROCOMPAT_SUPP) { 1261 return (EROFS); /* XXX needs translation */ 1262 } 1263 } 1264 return (0); 1265 } 1266