1 /* $NetBSD: ext2fs_vfsops.c,v 1.161 2011/10/07 09:35:06 hannken 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 1.161 2011/10/07 09:35:06 hannken 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 mvp = vnalloc(mp); 596 /* 597 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 598 * and vclean() can be called indirectly 599 */ 600 mutex_enter(&mntvnode_lock); 601 loop: 602 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 603 vmark(mvp, vp); 604 if (vp->v_mount != mp || vismarker(vp)) 605 continue; 606 /* 607 * Step 4: invalidate all inactive vnodes. 608 */ 609 if (vrecycle(vp, &mntvnode_lock, l)) { 610 mutex_enter(&mntvnode_lock); 611 (void)vunmark(mvp); 612 goto loop; 613 } 614 /* 615 * Step 5: invalidate all cached file data. 616 */ 617 mutex_enter(vp->v_interlock); 618 mutex_exit(&mntvnode_lock); 619 if (vget(vp, LK_EXCLUSIVE)) { 620 mutex_enter(&mntvnode_lock); 621 (void)vunmark(mvp); 622 goto loop; 623 } 624 if (vinvalbuf(vp, 0, cred, l, 0, 0)) 625 panic("ext2fs_reload: dirty2"); 626 /* 627 * Step 6: re-read inode data for all active vnodes. 628 */ 629 ip = VTOI(vp); 630 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 631 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 632 if (error) { 633 vput(vp); 634 mutex_enter(&mntvnode_lock); 635 (void)vunmark(mvp); 636 break; 637 } 638 cp = (char *)bp->b_data + 639 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 640 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 641 ext2fs_set_inode_guid(ip); 642 brelse(bp, 0); 643 vput(vp); 644 mutex_enter(&mntvnode_lock); 645 } 646 mutex_exit(&mntvnode_lock); 647 vnfree(mvp); 648 return (error); 649 } 650 651 /* 652 * Common code for mount and mountroot 653 */ 654 int 655 ext2fs_mountfs(struct vnode *devvp, struct mount *mp) 656 { 657 struct lwp *l = curlwp; 658 struct ufsmount *ump; 659 struct buf *bp; 660 struct ext2fs *fs; 661 struct m_ext2fs *m_fs; 662 dev_t dev; 663 int error, i, ronly; 664 kauth_cred_t cred; 665 struct proc *p; 666 667 dev = devvp->v_rdev; 668 p = l ? l->l_proc : NULL; 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 = malloc(sizeof(*ump), M_UFSMNT, M_WAITOK); 694 memset(ump, 0, sizeof(*ump)); 695 ump->um_fstype = UFS1; 696 ump->um_ops = &ext2fs_ufsops; 697 ump->um_e2fs = malloc(sizeof(struct m_ext2fs), M_UFSMNT, M_WAITOK); 698 memset(ump->um_e2fs, 0, sizeof(struct m_ext2fs)); 699 e2fs_sbload((struct ext2fs *)bp->b_data, &ump->um_e2fs->e2fs); 700 brelse(bp, 0); 701 bp = NULL; 702 m_fs = ump->um_e2fs; 703 m_fs->e2fs_ronly = ronly; 704 705 #ifdef DEBUG_EXT2 706 printf("ext2 ino size %zu\n", EXT2_DINODE_SIZE(m_fs)); 707 #endif 708 if (ronly == 0) { 709 if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN) 710 m_fs->e2fs.e2fs_state = 0; 711 else 712 m_fs->e2fs.e2fs_state = E2FS_ERRORS; 713 m_fs->e2fs_fmod = 1; 714 } 715 716 /* compute dynamic sb infos */ 717 m_fs->e2fs_ncg = 718 howmany(m_fs->e2fs.e2fs_bcount - m_fs->e2fs.e2fs_first_dblock, 719 m_fs->e2fs.e2fs_bpg); 720 m_fs->e2fs_fsbtodb = m_fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT; 721 m_fs->e2fs_bsize = MINBSIZE << m_fs->e2fs.e2fs_log_bsize; 722 m_fs->e2fs_bshift = LOG_MINBSIZE + m_fs->e2fs.e2fs_log_bsize; 723 m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1; 724 m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask; 725 m_fs->e2fs_ngdb = 726 howmany(m_fs->e2fs_ncg, m_fs->e2fs_bsize / sizeof(struct ext2_gd)); 727 m_fs->e2fs_ipb = m_fs->e2fs_bsize / EXT2_DINODE_SIZE(m_fs); 728 m_fs->e2fs_itpg = m_fs->e2fs.e2fs_ipg / m_fs->e2fs_ipb; 729 730 m_fs->e2fs_gd = malloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize, 731 M_UFSMNT, M_WAITOK); 732 for (i = 0; i < m_fs->e2fs_ngdb; i++) { 733 error = bread(devvp , 734 fsbtodb(m_fs, m_fs->e2fs.e2fs_first_dblock + 735 1 /* superblock */ + i), 736 m_fs->e2fs_bsize, NOCRED, 0, &bp); 737 if (error) { 738 free(m_fs->e2fs_gd, M_UFSMNT); 739 goto out; 740 } 741 e2fs_cgload((struct ext2_gd *)bp->b_data, 742 &m_fs->e2fs_gd[ 743 i * m_fs->e2fs_bsize / sizeof(struct ext2_gd)], 744 m_fs->e2fs_bsize); 745 brelse(bp, 0); 746 bp = NULL; 747 } 748 749 mp->mnt_data = ump; 750 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; 751 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_EXT2FS); 752 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 753 mp->mnt_stat.f_namemax = EXT2FS_MAXNAMLEN; 754 mp->mnt_flag |= MNT_LOCAL; 755 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */ 756 mp->mnt_fs_bshift = m_fs->e2fs_bshift; 757 mp->mnt_iflag |= IMNT_DTYPE; 758 ump->um_flags = 0; 759 ump->um_mountp = mp; 760 ump->um_dev = dev; 761 ump->um_devvp = devvp; 762 ump->um_nindir = NINDIR(m_fs); 763 ump->um_lognindir = ffs(NINDIR(m_fs)) - 1; 764 ump->um_bptrtodb = m_fs->e2fs_fsbtodb; 765 ump->um_seqinc = 1; /* no frags */ 766 ump->um_maxsymlinklen = EXT2_MAXSYMLINKLEN; 767 ump->um_dirblksiz = m_fs->e2fs_bsize; 768 ump->um_maxfilesize = ((uint64_t)0x80000000 * m_fs->e2fs_bsize - 1); 769 devvp->v_specmountpoint = mp; 770 return (0); 771 772 out: 773 KASSERT(bp != NULL); 774 brelse(bp, 0); 775 if (ump) { 776 free(ump->um_e2fs, M_UFSMNT); 777 free(ump, M_UFSMNT); 778 mp->mnt_data = NULL; 779 } 780 return (error); 781 } 782 783 /* 784 * unmount system call 785 */ 786 int 787 ext2fs_unmount(struct mount *mp, int mntflags) 788 { 789 struct ufsmount *ump; 790 struct m_ext2fs *fs; 791 int error, flags; 792 793 flags = 0; 794 if (mntflags & MNT_FORCE) 795 flags |= FORCECLOSE; 796 if ((error = ext2fs_flushfiles(mp, flags)) != 0) 797 return (error); 798 ump = VFSTOUFS(mp); 799 fs = ump->um_e2fs; 800 if (fs->e2fs_ronly == 0 && 801 ext2fs_cgupdate(ump, MNT_WAIT) == 0 && 802 (fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) { 803 fs->e2fs.e2fs_state = E2FS_ISCLEAN; 804 (void) ext2fs_sbupdate(ump, MNT_WAIT); 805 } 806 if (ump->um_devvp->v_type != VBAD) 807 ump->um_devvp->v_specmountpoint = NULL; 808 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 809 error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE, 810 NOCRED); 811 vput(ump->um_devvp); 812 free(fs->e2fs_gd, M_UFSMNT); 813 free(fs, M_UFSMNT); 814 free(ump, M_UFSMNT); 815 mp->mnt_data = NULL; 816 mp->mnt_flag &= ~MNT_LOCAL; 817 return (error); 818 } 819 820 /* 821 * Flush out all the files in a filesystem. 822 */ 823 int 824 ext2fs_flushfiles(struct mount *mp, int flags) 825 { 826 extern int doforce; 827 int error; 828 829 if (!doforce) 830 flags &= ~FORCECLOSE; 831 error = vflush(mp, NULLVP, flags); 832 return (error); 833 } 834 835 /* 836 * Get file system statistics. 837 */ 838 int 839 ext2fs_statvfs(struct mount *mp, struct statvfs *sbp) 840 { 841 struct ufsmount *ump; 842 struct m_ext2fs *fs; 843 uint32_t overhead, overhead_per_group, ngdb; 844 int i, ngroups; 845 846 ump = VFSTOUFS(mp); 847 fs = ump->um_e2fs; 848 if (fs->e2fs.e2fs_magic != E2FS_MAGIC) 849 panic("ext2fs_statvfs"); 850 851 /* 852 * Compute the overhead (FS structures) 853 */ 854 overhead_per_group = 855 1 /* block bitmap */ + 856 1 /* inode bitmap */ + 857 fs->e2fs_itpg; 858 overhead = fs->e2fs.e2fs_first_dblock + 859 fs->e2fs_ncg * overhead_per_group; 860 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 861 fs->e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 862 for (i = 0, ngroups = 0; i < fs->e2fs_ncg; i++) { 863 if (cg_has_sb(i)) 864 ngroups++; 865 } 866 } else { 867 ngroups = fs->e2fs_ncg; 868 } 869 ngdb = fs->e2fs_ngdb; 870 if (fs->e2fs.e2fs_rev > E2FS_REV0 && 871 fs->e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) 872 ngdb += fs->e2fs.e2fs_reserved_ngdb; 873 overhead += ngroups * (1 /* superblock */ + ngdb); 874 875 sbp->f_bsize = fs->e2fs_bsize; 876 sbp->f_frsize = MINBSIZE << fs->e2fs.e2fs_fsize; 877 sbp->f_iosize = fs->e2fs_bsize; 878 sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead; 879 sbp->f_bfree = fs->e2fs.e2fs_fbcount; 880 sbp->f_bresvd = fs->e2fs.e2fs_rbcount; 881 if (sbp->f_bfree > sbp->f_bresvd) 882 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; 883 else 884 sbp->f_bavail = 0; 885 sbp->f_files = fs->e2fs.e2fs_icount; 886 sbp->f_ffree = fs->e2fs.e2fs_ficount; 887 sbp->f_favail = fs->e2fs.e2fs_ficount; 888 sbp->f_fresvd = 0; 889 copy_statvfs_info(sbp, mp); 890 return (0); 891 } 892 893 /* 894 * Go through the disk queues to initiate sandbagged IO; 895 * go through the inodes to write those that have been modified; 896 * initiate the writing of the super block if it has been modified. 897 * 898 * Note: we are always called with the filesystem marked `MPBUSY'. 899 */ 900 int 901 ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) 902 { 903 struct vnode *vp, *mvp; 904 struct inode *ip; 905 struct ufsmount *ump = VFSTOUFS(mp); 906 struct m_ext2fs *fs; 907 int error, allerror = 0; 908 909 fs = ump->um_e2fs; 910 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */ 911 printf("fs = %s\n", fs->e2fs_fsmnt); 912 panic("update: rofs mod"); 913 } 914 915 /* Allocate a marker vnode. */ 916 mvp = vnalloc(mp); 917 918 /* 919 * Write back each (modified) inode. 920 */ 921 mutex_enter(&mntvnode_lock); 922 loop: 923 /* 924 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone() 925 * and vclean() can be called indirectly 926 */ 927 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) { 928 vmark(mvp, vp); 929 if (vp->v_mount != mp || vismarker(vp)) 930 continue; 931 mutex_enter(vp->v_interlock); 932 ip = VTOI(vp); 933 if (ip == NULL || (vp->v_iflag & (VI_XLOCK|VI_CLEAN)) != 0 || 934 vp->v_type == VNON || 935 ((ip->i_flag & 936 (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 937 LIST_EMPTY(&vp->v_dirtyblkhd) && 938 UVM_OBJ_IS_CLEAN(&vp->v_uobj))) 939 { 940 mutex_exit(vp->v_interlock); 941 continue; 942 } 943 mutex_exit(&mntvnode_lock); 944 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT); 945 if (error) { 946 mutex_enter(&mntvnode_lock); 947 if (error == ENOENT) { 948 mutex_enter(&mntvnode_lock); 949 (void)vunmark(mvp); 950 goto loop; 951 } 952 continue; 953 } 954 if (vp->v_type == VREG && waitfor == MNT_LAZY) 955 error = ext2fs_update(vp, NULL, NULL, 0); 956 else 957 error = VOP_FSYNC(vp, cred, 958 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0); 959 if (error) 960 allerror = error; 961 vput(vp); 962 mutex_enter(&mntvnode_lock); 963 } 964 mutex_exit(&mntvnode_lock); 965 vnfree(mvp); 966 /* 967 * Force stale file system control information to be flushed. 968 */ 969 if (waitfor != MNT_LAZY) { 970 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); 971 if ((error = VOP_FSYNC(ump->um_devvp, cred, 972 waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0) 973 allerror = error; 974 VOP_UNLOCK(ump->um_devvp); 975 } 976 /* 977 * Write back modified superblock. 978 */ 979 if (fs->e2fs_fmod != 0) { 980 fs->e2fs_fmod = 0; 981 fs->e2fs.e2fs_wtime = time_second; 982 if ((error = ext2fs_cgupdate(ump, waitfor))) 983 allerror = error; 984 } 985 return (allerror); 986 } 987 988 /* 989 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 990 * in from disk. If it is in core, wait for the lock bit to clear, then 991 * return the inode locked. Detection and handling of mount points must be 992 * done by the calling routine. 993 */ 994 int 995 ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 996 { 997 struct m_ext2fs *fs; 998 struct inode *ip; 999 struct ufsmount *ump; 1000 struct buf *bp; 1001 struct vnode *vp; 1002 dev_t dev; 1003 int error; 1004 void *cp; 1005 1006 ump = VFSTOUFS(mp); 1007 dev = ump->um_dev; 1008 retry: 1009 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) 1010 return (0); 1011 1012 /* Allocate a new vnode/inode. */ 1013 error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, NULL, &vp); 1014 if (error) { 1015 *vpp = NULL; 1016 return (error); 1017 } 1018 ip = pool_get(&ext2fs_inode_pool, PR_WAITOK); 1019 1020 mutex_enter(&ufs_hashlock); 1021 if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) { 1022 mutex_exit(&ufs_hashlock); 1023 ungetnewvnode(vp); 1024 pool_put(&ext2fs_inode_pool, ip); 1025 goto retry; 1026 } 1027 1028 vp->v_vflag |= VV_LOCKSWORK; 1029 1030 memset(ip, 0, sizeof(struct inode)); 1031 vp->v_data = ip; 1032 ip->i_vnode = vp; 1033 ip->i_ump = ump; 1034 ip->i_e2fs = fs = ump->um_e2fs; 1035 ip->i_dev = dev; 1036 ip->i_number = ino; 1037 ip->i_e2fs_last_lblk = 0; 1038 ip->i_e2fs_last_blk = 0; 1039 genfs_node_init(vp, &ext2fs_genfsops); 1040 1041 /* 1042 * Put it onto its hash chain and lock it so that other requests for 1043 * this inode will block if they arrive while we are sleeping waiting 1044 * for old data structures to be purged or for the contents of the 1045 * disk portion of this inode to be read. 1046 */ 1047 1048 ufs_ihashins(ip); 1049 mutex_exit(&ufs_hashlock); 1050 1051 /* Read in the disk contents for the inode, copy into the inode. */ 1052 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 1053 (int)fs->e2fs_bsize, NOCRED, 0, &bp); 1054 if (error) { 1055 1056 /* 1057 * The inode does not contain anything useful, so it would 1058 * be misleading to leave it on its hash chain. With mode 1059 * still zero, it will be unlinked and returned to the free 1060 * list by vput(). 1061 */ 1062 1063 vput(vp); 1064 brelse(bp, 0); 1065 *vpp = NULL; 1066 return (error); 1067 } 1068 cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)); 1069 ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK); 1070 e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din); 1071 ext2fs_set_inode_guid(ip); 1072 brelse(bp, 0); 1073 1074 /* If the inode was deleted, reset all fields */ 1075 if (ip->i_e2fs_dtime != 0) { 1076 ip->i_e2fs_mode = ip->i_e2fs_nblock = 0; 1077 (void)ext2fs_setsize(ip, 0); 1078 memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks)); 1079 } 1080 1081 /* 1082 * Initialize the vnode from the inode, check for aliases. 1083 */ 1084 1085 error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp); 1086 if (error) { 1087 vput(vp); 1088 *vpp = NULL; 1089 return (error); 1090 } 1091 /* 1092 * Finish inode initialization now that aliasing has been resolved. 1093 */ 1094 1095 ip->i_devvp = ump->um_devvp; 1096 vref(ip->i_devvp); 1097 1098 /* 1099 * Set up a generation number for this inode if it does not 1100 * already have one. This should only happen on old filesystems. 1101 */ 1102 1103 if (ip->i_e2fs_gen == 0) { 1104 if (++ext2gennumber < (u_long)time_second) 1105 ext2gennumber = time_second; 1106 ip->i_e2fs_gen = ext2gennumber; 1107 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 1108 ip->i_flag |= IN_MODIFIED; 1109 } 1110 uvm_vnp_setsize(vp, ext2fs_size(ip)); 1111 *vpp = vp; 1112 return (0); 1113 } 1114 1115 /* 1116 * File handle to vnode 1117 * 1118 * Have to be really careful about stale file handles: 1119 * - check that the inode number is valid 1120 * - call ext2fs_vget() to get the locked inode 1121 * - check for an unallocated inode (i_mode == 0) 1122 */ 1123 int 1124 ext2fs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 1125 { 1126 struct inode *ip; 1127 struct vnode *nvp; 1128 int error; 1129 struct ufid ufh; 1130 struct m_ext2fs *fs; 1131 1132 if (fhp->fid_len != sizeof(struct ufid)) 1133 return EINVAL; 1134 1135 memcpy(&ufh, fhp, sizeof(struct ufid)); 1136 fs = VFSTOUFS(mp)->um_e2fs; 1137 if ((ufh.ufid_ino < EXT2_FIRSTINO && ufh.ufid_ino != EXT2_ROOTINO) || 1138 ufh.ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg) 1139 return (ESTALE); 1140 1141 if ((error = VFS_VGET(mp, ufh.ufid_ino, &nvp)) != 0) { 1142 *vpp = NULLVP; 1143 return (error); 1144 } 1145 ip = VTOI(nvp); 1146 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 || 1147 ip->i_e2fs_gen != ufh.ufid_gen) { 1148 vput(nvp); 1149 *vpp = NULLVP; 1150 return (ESTALE); 1151 } 1152 *vpp = nvp; 1153 return (0); 1154 } 1155 1156 /* 1157 * Vnode pointer to File handle 1158 */ 1159 /* ARGSUSED */ 1160 int 1161 ext2fs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) 1162 { 1163 struct inode *ip; 1164 struct ufid ufh; 1165 1166 if (*fh_size < sizeof(struct ufid)) { 1167 *fh_size = sizeof(struct ufid); 1168 return E2BIG; 1169 } 1170 *fh_size = sizeof(struct ufid); 1171 1172 ip = VTOI(vp); 1173 memset(&ufh, 0, sizeof(ufh)); 1174 ufh.ufid_len = sizeof(struct ufid); 1175 ufh.ufid_ino = ip->i_number; 1176 ufh.ufid_gen = ip->i_e2fs_gen; 1177 memcpy(fhp, &ufh, sizeof(ufh)); 1178 return (0); 1179 } 1180 1181 /* 1182 * Write a superblock and associated information back to disk. 1183 */ 1184 int 1185 ext2fs_sbupdate(struct ufsmount *mp, int waitfor) 1186 { 1187 struct m_ext2fs *fs = mp->um_e2fs; 1188 struct buf *bp; 1189 int error = 0; 1190 1191 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 1192 e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data); 1193 if (waitfor == MNT_WAIT) 1194 error = bwrite(bp); 1195 else 1196 bawrite(bp); 1197 return (error); 1198 } 1199 1200 int 1201 ext2fs_cgupdate(struct ufsmount *mp, int waitfor) 1202 { 1203 struct m_ext2fs *fs = mp->um_e2fs; 1204 struct buf *bp; 1205 int i, error = 0, allerror = 0; 1206 1207 allerror = ext2fs_sbupdate(mp, waitfor); 1208 for (i = 0; i < fs->e2fs_ngdb; i++) { 1209 bp = getblk(mp->um_devvp, fsbtodb(fs, 1210 fs->e2fs.e2fs_first_dblock + 1211 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0); 1212 e2fs_cgsave(&fs->e2fs_gd[ 1213 i * fs->e2fs_bsize / sizeof(struct ext2_gd)], 1214 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize); 1215 if (waitfor == MNT_WAIT) 1216 error = bwrite(bp); 1217 else 1218 bawrite(bp); 1219 } 1220 1221 if (!allerror && error) 1222 allerror = error; 1223 return (allerror); 1224 } 1225 1226 static int 1227 ext2fs_checksb(struct ext2fs *fs, int ronly) 1228 { 1229 1230 if (fs2h16(fs->e2fs_magic) != E2FS_MAGIC) { 1231 return (EINVAL); /* XXX needs translation */ 1232 } 1233 if (fs2h32(fs->e2fs_rev) > E2FS_REV1) { 1234 #ifdef DIAGNOSTIC 1235 printf("Ext2 fs: unsupported revision number: %x\n", 1236 fs2h32(fs->e2fs_rev)); 1237 #endif 1238 return (EINVAL); /* XXX needs translation */ 1239 } 1240 if (fs2h32(fs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */ 1241 #ifdef DIAGNOSTIC 1242 printf("Ext2 fs: bad block size: %d " 1243 "(expected <= 2 for ext2 fs)\n", 1244 fs2h32(fs->e2fs_log_bsize)); 1245 #endif 1246 return (EINVAL); /* XXX needs translation */ 1247 } 1248 if (fs2h32(fs->e2fs_rev) > E2FS_REV0) { 1249 if (fs2h32(fs->e2fs_first_ino) != EXT2_FIRSTINO) { 1250 printf("Ext2 fs: unsupported first inode position\n"); 1251 return (EINVAL); /* XXX needs translation */ 1252 } 1253 if (fs2h32(fs->e2fs_features_incompat) & 1254 ~EXT2F_INCOMPAT_SUPP) { 1255 printf("Ext2 fs: unsupported optional feature\n"); 1256 return (EINVAL); /* XXX needs translation */ 1257 } 1258 if (!ronly && fs2h32(fs->e2fs_features_rocompat) & 1259 ~EXT2F_ROCOMPAT_SUPP) { 1260 return (EROFS); /* XXX needs translation */ 1261 } 1262 } 1263 return (0); 1264 } 1265