1 /* $NetBSD: ext2fs_vfsops.c,v 1.163 2012/03/13 18:41:04 elad 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 1.163 2012/03/13 18:41:04 elad 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 brelse(bp, 0); 551 return (error); 552 } 553 newfs = (struct ext2fs *)bp->b_data; 554 error = ext2fs_checksb(newfs, (mp->mnt_flag & MNT_RDONLY) != 0); 555 if (error) { 556 brelse(bp, 0); 557 return (error); 558 } 559 560 fs = ump->um_e2fs; 561 /* 562 * copy in new superblock, and compute in-memory values 563 */ 564 e2fs_sbload(newfs, &fs->e2fs); 565 fs->e2fs_ncg = 566 howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, 567 fs->e2fs.e2fs_bpg); 568 fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 569 fs->e2fs_bsize = MINBSIZE << fs->e2fs.e2fs_log_bsize; 570 fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; 571 fs->e2fs_qbmask = fs->e2fs_bsize - 1; 572 fs->e2fs_bmask = ~fs->e2fs_qbmask; 573 fs->e2fs_ngdb = 574 howmany(fs->e2fs_ncg, fs->e2fs_bsize / sizeof(struct ext2_gd)); 575 fs->e2fs_ipb = fs->e2fs_bsize / EXT2_DINODE_SIZE(fs); 576 fs->e2fs_itpg = fs->e2fs.e2fs_ipg / fs->e2fs_ipb; 577 brelse(bp, 0); 578 579 /* 580 * Step 3: re-read summary information from disk. 581 */ 582 583 for (i = 0; i < fs->e2fs_ngdb; i++) { 584 error = bread(devvp , 585 fsbtodb(fs, fs->e2fs.e2fs_first_dblock + 586 1 /* superblock */ + i), 587 fs->e2fs_bsize, NOCRED, 0, &bp); 588 if (error) { 589 brelse(bp, 0); 590 return (error); 591 } 592 e2fs_cgload((struct ext2_gd *)bp->b_data, 593 &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 594 fs->e2fs_bsize); 595 brelse(bp, 0); 596 } 597 598 /* Allocate a marker vnode. */ 599 mvp = vnalloc(mp); 600 /* 601 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 602 * and vclean() can be called indirectly 603 */ 604 mutex_enter(&mntvnode_lock); 605 loop: 606 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 607 vmark(mvp, vp); 608 if (vp->v_mount != mp || vismarker(vp)) 609 continue; 610 /* 611 * Step 4: invalidate all inactive vnodes. 612 */ 613 if (vrecycle(vp, &mntvnode_lock, l)) { 614 mutex_enter(&mntvnode_lock); 615 (void)vunmark(mvp); 616 goto loop; 617 } 618 /* 619 * Step 5: invalidate all cached file data. 620 */ 621 mutex_enter(vp->v_interlock); 622 mutex_exit(&mntvnode_lock); 623 if (vget(vp, LK_EXCLUSIVE)) { 624 mutex_enter(&mntvnode_lock); 625 (void)vunmark(mvp); 626 goto loop; 627 } 628 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 629 panic("ext2fs_reload: dirty2"); 630 /* 631 * Step 6: re-read inode data for all active vnodes. 632 */ 633 ip = VTOI(vp); 634 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 635 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 636 if (error) { 637 vput(vp); 638 mutex_enter(&mntvnode_lock); 639 (void)vunmark(mvp); 640 break; 641 } 642 cp = (char *)bp->b_data + 643 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 644 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 645 ext2fs_set_inode_guid(ip); 646 brelse(bp, 0); 647 vput(vp); 648 mutex_enter(&mntvnode_lock); 649 } 650 mutex_exit(&mntvnode_lock); 651 vnfree(mvp); 652 return (error); 653 } 654 655 /* 656 * Common code for mount and mountroot 657 */ 658 int 659 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 660 { 661 struct lwp *l = curlwp; 662 struct ufsmount *ump; 663 struct buf *bp; 664 struct ext2fs *fs; 665 struct m_ext2fs *m_fs; 666 dev_t dev; 667 int error, i, ronly; 668 kauth_cred_t cred; 669 struct proc *p; 670 671 dev = devvp->v_rdev; 672 p = l ? l->l_proc : NULL; 673 cred = l ? l->l_cred : NOCRED; 674 675 /* Flush out any old buffers remaining from a previous use. */ 676 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 677 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 678 VOP_UNLOCK(devvp); 679 if (error) 680 return (error); 681 682 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 683 684 bp = NULL; 685 ump = NULL; 686 687 #ifdef DEBUG_EXT2 688 printf("ext2 sb size: %zu\n", sizeof(struct ext2fs)); 689 #endif 690 error = bread(devvp, SBLOCK, SBSIZE, cred, 0, &bp); 691 if (error) 692 goto out; 693 fs = (struct ext2fs *)bp->b_data; 694 error = ext2fs_checksb(fs, ronly); 695 if (error) 696 goto out; 697 ump = malloc(sizeof(*ump), M_UFSMNT, M_WAITOK); 698 memset(ump, 0, sizeof(*ump)); 699 ump->um_fstype = UFS1; 700 ump->um_ops = &ext2fs_ufsops; 701 ump->um_e2fs = malloc(sizeof(struct m_ext2fs), M_UFSMNT, M_WAITOK); 702 memset(ump->um_e2fs, 0, sizeof(struct m_ext2fs)); 703 e2fs_sbload((struct ext2fs *)bp->b_data, &ump->um_e2fs->e2fs); 704 brelse(bp, 0); 705 bp = NULL; 706 m_fs = ump->um_e2fs; 707 m_fs->e2fs_ronly = ronly; 708 709 #ifdef DEBUG_EXT2 710 printf("ext2 ino size %zu\n", EXT2_DINODE_SIZE(m_fs)); 711 #endif 712 if (ronly == 0) { 713 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 714 m_fs->e2fs.e2fs_state = 0; 715 else 716 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 717 m_fs->e2fs_fmod = 1; 718 } 719 720 /* compute dynamic sb infos */ 721 m_fs->e2fs_ncg = 722 howmany(m_fs->e2fs.e2fs_bcount - m_fs->e2fs.e2fs_first_dblock, 723 m_fs->e2fs.e2fs_bpg); 724 m_fs->e2fs_fsbtodb = m_fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 725 m_fs->e2fs_bsize = MINBSIZE << m_fs->e2fs.e2fs_log_bsize; 726 m_fs->e2fs_bshift = LOG_MINBSIZE + m_fs->e2fs.e2fs_log_bsize; 727 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 728 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 729 m_fs->e2fs_ngdb = 730 howmany(m_fs->e2fs_ncg, m_fs->e2fs_bsize / sizeof(struct ext2_gd)); 731 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 732 m_fs->e2fs_itpg = m_fs->e2fs.e2fs_ipg / m_fs->e2fs_ipb; 733 734 m_fs->e2fs_gd = malloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, 735 M_UFSMNT, M_WAITOK); 736 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 737 error = bread(devvp , 738 fsbtodb(m_fs, m_fs->e2fs.e2fs_first_dblock + 739 1 /* superblock */ + i), 740 m_fs->e2fs_bsize, NOCRED, 0, &bp); 741 if (error) { 742 free(m_fs->e2fs_gd, M_UFSMNT); 743 goto out; 744 } 745 e2fs_cgload((struct ext2_gd *)bp->b_data, 746 &m_fs->e2fs_gd[ 747 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 748 m_fs->e2fs_bsize); 749 brelse(bp, 0); 750 bp = NULL; 751 } 752 753 mp->mnt_data = ump; 754 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 755 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 756 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 757 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 758 mp->mnt_flag |= MNT_LOCAL; 759 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 760 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 761 mp->mnt_iflag |= IMNT_DTYPE; 762 ump->um_flags = 0; 763 ump->um_mountp = mp; 764 ump->um_dev = dev; 765 ump->um_devvp = devvp; 766 ump->um_nindir = NINDIR(m_fs); 767 ump->um_lognindir = ffs(NINDIR(m_fs)) - 1; 768 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 769 ump->um_seqinc = 1; /* no frags */ 770 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 771 ump->um_dirblksiz = m_fs->e2fs_bsize; 772 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 773 devvp->v_specmountpoint = mp; 774 return (0); 775 776 out: 777 KASSERT(bp != NULL); 778 brelse(bp, 0); 779 if (ump) { 780 free(ump->um_e2fs, M_UFSMNT); 781 free(ump, M_UFSMNT); 782 mp->mnt_data = NULL; 783 } 784 return (error); 785 } 786 787 /* 788 * unmount system call 789 */ 790 int 791 ext2fs_unmount(struct mount *mp, int mntflags) 792 { 793 struct ufsmount *ump; 794 struct m_ext2fs *fs; 795 int error, flags; 796 797 flags = 0; 798 if (mntflags & MNT_FORCE) 799 flags |= FORCECLOSE; 800 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 801 return (error); 802 ump = VFSTOUFS(mp); 803 fs = ump->um_e2fs; 804 if (fs->e2fs_ronly == 0 && 805 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 806 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 807 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 808 (void) ext2fs_sbupdate(ump, MNT_WAIT); 809 } 810 if (ump->um_devvp->v_type != VBAD) 811 ump->um_devvp->v_specmountpoint = NULL; 812 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 813 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 814 NOCRED); 815 vput(ump->um_devvp); 816 free(fs->e2fs_gd, M_UFSMNT); 817 free(fs, M_UFSMNT); 818 free(ump, M_UFSMNT); 819 mp->mnt_data = NULL; 820 mp->mnt_flag &= ~MNT_LOCAL; 821 return (error); 822 } 823 824 /* 825 * Flush out all the files in a filesystem. 826 */ 827 int 828 ext2fs_flushfiles(struct mount *mp, int flags) 829 { 830 extern int doforce; 831 int error; 832 833 if (!doforce) 834 flags &= ~FORCECLOSE; 835 error = vflush(mp, NULLVP, flags); 836 return (error); 837 } 838 839 /* 840 * Get file system statistics. 841 */ 842 int 843 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 844 { 845 struct ufsmount *ump; 846 struct m_ext2fs *fs; 847 uint32_t overhead, overhead_per_group, ngdb; 848 int i, ngroups; 849 850 ump = VFSTOUFS(mp); 851 fs = ump->um_e2fs; 852 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 853 panic("ext2fs_statvfs"); 854 855 /* 856 * Compute the overhead (FS structures) 857 */ 858 overhead_per_group = 859 1 /* block bitmap */ + 860 1 /* inode bitmap */ + 861 fs->e2fs_itpg; 862 overhead = fs->e2fs.e2fs_first_dblock + 863 fs->e2fs_ncg * overhead_per_group; 864 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 865 fs->e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 866 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 867 if (cg_has_sb(i)) 868 ngroups++; 869 } 870 } else { 871 ngroups = fs->e2fs_ncg; 872 } 873 ngdb = fs->e2fs_ngdb; 874 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 875 fs->e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) 876 ngdb += fs->e2fs.e2fs_reserved_ngdb; 877 overhead += ngroups * (1 /* superblock */ + ngdb); 878 879 sbp->f_bsize = fs->e2fs_bsize; 880 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 881 sbp->f_iosize = fs->e2fs_bsize; 882 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 883 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 884 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 885 if (sbp->f_bfree > sbp->f_bresvd) 886 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 887 else 888 sbp->f_bavail = 0; 889 sbp->f_files = fs->e2fs.e2fs_icount; 890 sbp->f_ffree = fs->e2fs.e2fs_ficount; 891 sbp->f_favail = fs->e2fs.e2fs_ficount; 892 sbp->f_fresvd = 0; 893 copy_statvfs_info(sbp, mp); 894 return (0); 895 } 896 897 /* 898 * Go through the disk queues to initiate sandbagged IO; 899 * go through the inodes to write those that have been modified; 900 * initiate the writing of the super block if it has been modified. 901 * 902 * Note: we are always called with the filesystem marked `MPBUSY'. 903 */ 904 int 905 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 906 { 907 struct vnode *vp, *mvp; 908 struct inode *ip; 909 struct ufsmount *ump = VFSTOUFS(mp); 910 struct m_ext2fs *fs; 911 int error, allerror = 0; 912 913 fs = ump->um_e2fs; 914 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 915 printf("fs = %s\n", fs->e2fs_fsmnt); 916 panic("update: rofs mod"); 917 } 918 919 /* Allocate a marker vnode. */ 920 mvp = vnalloc(mp); 921 922 /* 923 * Write back each (modified) inode. 924 */ 925 mutex_enter(&mntvnode_lock); 926 loop: 927 /* 928 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 929 * and vclean() can be called indirectly 930 */ 931 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 932 vmark(mvp, vp); 933 if (vp->v_mount != mp || vismarker(vp)) 934 continue; 935 mutex_enter(vp->v_interlock); 936 ip = VTOI(vp); 937 if (ip == NULL || (vp->v_iflag & (VI_XLOCK|VI_CLEAN)) != 0 || 938 vp->v_type == VNON || 939 ((ip->i_flag & 940 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 941 LIST_EMPTY(&vp->v_dirtyblkhd) && 942 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 943 { 944 mutex_exit(vp->v_interlock); 945 continue; 946 } 947 mutex_exit(&mntvnode_lock); 948 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT); 949 if (error) { 950 mutex_enter(&mntvnode_lock); 951 if (error == ENOENT) { 952 mutex_enter(&mntvnode_lock); 953 (void)vunmark(mvp); 954 goto loop; 955 } 956 continue; 957 } 958 if (vp->v_type == VREG && waitfor == MNT_LAZY) 959 error = ext2fs_update(vp, NULL, NULL, 0); 960 else 961 error = VOP_FSYNC(vp, cred, 962 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 963 if (error) 964 allerror = error; 965 vput(vp); 966 mutex_enter(&mntvnode_lock); 967 } 968 mutex_exit(&mntvnode_lock); 969 vnfree(mvp); 970 /* 971 * Force stale file system control information to be flushed. 972 */ 973 if (waitfor != MNT_LAZY) { 974 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 975 if ((error = VOP_FSYNC(ump->um_devvp, cred, 976 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 977 allerror = error; 978 VOP_UNLOCK(ump->um_devvp); 979 } 980 /* 981 * Write back modified superblock. 982 */ 983 if (fs->e2fs_fmod != 0) { 984 fs->e2fs_fmod = 0; 985 fs->e2fs.e2fs_wtime = time_second; 986 if ((error = ext2fs_cgupdate(ump, waitfor))) 987 allerror = error; 988 } 989 return (allerror); 990 } 991 992 /* 993 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 994 * in from disk. If it is in core, wait for the lock bit to clear, then 995 * return the inode locked. Detection and handling of mount points must be 996 * done by the calling routine. 997 */ 998 int 999 ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1000 { 1001 struct m_ext2fs *fs; 1002 struct inode *ip; 1003 struct ufsmount *ump; 1004 struct buf *bp; 1005 struct vnode *vp; 1006 dev_t dev; 1007 int error; 1008 void *cp; 1009 1010 ump = VFSTOUFS(mp); 1011 dev = ump->um_dev; 1012 retry: 1013 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1014 return (0); 1015 1016 /* Allocate a new vnode/inode. */ 1017 error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, NULL, &vp); 1018 if (error) { 1019 *vpp = NULL; 1020 return (error); 1021 } 1022 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 1023 1024 mutex_enter(&ufs_hashlock); 1025 if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) { 1026 mutex_exit(&ufs_hashlock); 1027 ungetnewvnode(vp); 1028 pool_put(&ext2fs_inode_pool, ip); 1029 goto retry; 1030 } 1031 1032 vp->v_vflag |= VV_LOCKSWORK; 1033 1034 memset(ip, 0, sizeof(struct inode)); 1035 vp->v_data = ip; 1036 ip->i_vnode = vp; 1037 ip->i_ump = ump; 1038 ip->i_e2fs = fs = ump->um_e2fs; 1039 ip->i_dev = dev; 1040 ip->i_number = ino; 1041 ip->i_e2fs_last_lblk = 0; 1042 ip->i_e2fs_last_blk = 0; 1043 genfs_node_init(vp, &ext2fs_genfsops); 1044 1045 /* 1046 * Put it onto its hash chain and lock it so that other requests for 1047 * this inode will block if they arrive while we are sleeping waiting 1048 * for old data structures to be purged or for the contents of the 1049 * disk portion of this inode to be read. 1050 */ 1051 1052 ufs_ihashins(ip); 1053 mutex_exit(&ufs_hashlock); 1054 1055 /* Read in the disk contents for the inode, copy into the inode. */ 1056 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1057 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 1058 if (error) { 1059 1060 /* 1061 * The inode does not contain anything useful, so it would 1062 * be misleading to leave it on its hash chain. With mode 1063 * still zero, it will be unlinked and returned to the free 1064 * list by vput(). 1065 */ 1066 1067 vput(vp); 1068 brelse(bp, 0); 1069 *vpp = NULL; 1070 return (error); 1071 } 1072 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 1073 ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK); 1074 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 1075 ext2fs_set_inode_guid(ip); 1076 brelse(bp, 0); 1077 1078 /* If the inode was deleted, reset all fields */ 1079 if (ip->i_e2fs_dtime != 0) { 1080 ip->i_e2fs_mode = ip->i_e2fs_nblock = 0; 1081 (void)ext2fs_setsize(ip, 0); 1082 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 1083 } 1084 1085 /* 1086 * Initialize the vnode from the inode, check for aliases. 1087 */ 1088 1089 error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 1090 if (error) { 1091 vput(vp); 1092 *vpp = NULL; 1093 return (error); 1094 } 1095 /* 1096 * Finish inode initialization now that aliasing has been resolved. 1097 */ 1098 1099 ip->i_devvp = ump->um_devvp; 1100 vref(ip->i_devvp); 1101 1102 /* 1103 * Set up a generation number for this inode if it does not 1104 * already have one. This should only happen on old filesystems. 1105 */ 1106 1107 if (ip->i_e2fs_gen == 0) { 1108 if (++ext2gennumber < (u_long)time_second) 1109 ext2gennumber = time_second; 1110 ip->i_e2fs_gen = ext2gennumber; 1111 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1112 ip->i_flag |= IN_MODIFIED; 1113 } 1114 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1115 *vpp = vp; 1116 return (0); 1117 } 1118 1119 /* 1120 * File handle to vnode 1121 * 1122 * Have to be really careful about stale file handles: 1123 * - check that the inode number is valid 1124 * - call ext2fs_vget() to get the locked inode 1125 * - check for an unallocated inode (i_mode == 0) 1126 */ 1127 int 1128 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1129 { 1130 struct inode *ip; 1131 struct vnode *nvp; 1132 int error; 1133 struct ufid ufh; 1134 struct m_ext2fs *fs; 1135 1136 if (fhp->fid_len != sizeof(struct ufid)) 1137 return EINVAL; 1138 1139 memcpy(&ufh, fhp, sizeof(struct ufid)); 1140 fs = VFSTOUFS(mp)->um_e2fs; 1141 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1142 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1143 return (ESTALE); 1144 1145 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1146 *vpp = NULLVP; 1147 return (error); 1148 } 1149 ip = VTOI(nvp); 1150 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1151 ip->i_e2fs_gen != ufh.ufid_gen) { 1152 vput(nvp); 1153 *vpp = NULLVP; 1154 return (ESTALE); 1155 } 1156 *vpp = nvp; 1157 return (0); 1158 } 1159 1160 /* 1161 * Vnode pointer to File handle 1162 */ 1163 /* ARGSUSED */ 1164 int 1165 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1166 { 1167 struct inode *ip; 1168 struct ufid ufh; 1169 1170 if (*fh_size < sizeof(struct ufid)) { 1171 *fh_size = sizeof(struct ufid); 1172 return E2BIG; 1173 } 1174 *fh_size = sizeof(struct ufid); 1175 1176 ip = VTOI(vp); 1177 memset(&ufh, 0, sizeof(ufh)); 1178 ufh.ufid_len = sizeof(struct ufid); 1179 ufh.ufid_ino = ip->i_number; 1180 ufh.ufid_gen = ip->i_e2fs_gen; 1181 memcpy(fhp, &ufh, sizeof(ufh)); 1182 return (0); 1183 } 1184 1185 /* 1186 * Write a superblock and associated information back to disk. 1187 */ 1188 int 1189 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1190 { 1191 struct m_ext2fs *fs = mp->um_e2fs; 1192 struct buf *bp; 1193 int error = 0; 1194 1195 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1196 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1197 if (waitfor == MNT_WAIT) 1198 error = bwrite(bp); 1199 else 1200 bawrite(bp); 1201 return (error); 1202 } 1203 1204 int 1205 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1206 { 1207 struct m_ext2fs *fs = mp->um_e2fs; 1208 struct buf *bp; 1209 int i, error = 0, allerror = 0; 1210 1211 allerror = ext2fs_sbupdate(mp, waitfor); 1212 for (i = 0; i < fs->e2fs_ngdb; i++) { 1213 bp = getblk(mp->um_devvp, fsbtodb(fs, 1214 fs->e2fs.e2fs_first_dblock + 1215 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1216 e2fs_cgsave(&fs->e2fs_gd[ 1217 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1218 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1219 if (waitfor == MNT_WAIT) 1220 error = bwrite(bp); 1221 else 1222 bawrite(bp); 1223 } 1224 1225 if (!allerror && error) 1226 allerror = error; 1227 return (allerror); 1228 } 1229 1230 static int 1231 ext2fs_checksb(struct ext2fs *fs, int ronly) 1232 { 1233 1234 if (fs2h16(fs->e2fs_magic) != E2FS_MAGIC) { 1235 return (EINVAL); /* XXX needs translation */ 1236 } 1237 if (fs2h32(fs->e2fs_rev) > E2FS_REV1) { 1238 #ifdef DIAGNOSTIC 1239 printf("Ext2 fs: unsupported revision number: %x\n", 1240 fs2h32(fs->e2fs_rev)); 1241 #endif 1242 return (EINVAL); /* XXX needs translation */ 1243 } 1244 if (fs2h32(fs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */ 1245 #ifdef DIAGNOSTIC 1246 printf("Ext2 fs: bad block size: %d " 1247 "(expected <= 2 for ext2 fs)\n", 1248 fs2h32(fs->e2fs_log_bsize)); 1249 #endif 1250 return (EINVAL); /* XXX needs translation */ 1251 } 1252 if (fs2h32(fs->e2fs_rev) > E2FS_REV0) { 1253 if (fs2h32(fs->e2fs_first_ino) != EXT2_FIRSTINO) { 1254 printf("Ext2 fs: unsupported first inode position\n"); 1255 return (EINVAL); /* XXX needs translation */ 1256 } 1257 if (fs2h32(fs->e2fs_features_incompat) & 1258 ~EXT2F_INCOMPAT_SUPP) { 1259 printf("Ext2 fs: unsupported optional feature\n"); 1260 return (EINVAL); /* XXX needs translation */ 1261 } 1262 if (!ronly && fs2h32(fs->e2fs_features_rocompat) & 1263 ~EXT2F_ROCOMPAT_SUPP) { 1264 return (EROFS); /* XXX needs translation */ 1265 } 1266 } 1267 return (0); 1268 } 1269