示例#1
0
void check_mount(const char *device, int force, const char *type)
{
	errcode_t	retval;
	int		mount_flags;

	retval = ext2fs_check_if_mounted(device, &mount_flags);
	if (retval) {
		com_err("ext2fs_check_if_mount", retval,
			_("while determining whether %s is mounted."),
			device);
		return;
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		fprintf(stderr, _("%s is mounted; "), device);
		if (force >= 2) {
			fputs(_("mke2fs forced anyway.  Hope /etc/mtab is "
				"incorrect.\n"), stderr);
			return;
		}
	abort_mke2fs:
		fprintf(stderr, _("will not make a %s here!\n"), type);
		exit(1);
	}
	if (mount_flags & EXT2_MF_BUSY) {
		fprintf(stderr, _("%s is apparently in use by the system; "),
			device);
		if (force >= 2) {
			fputs(_("mke2fs forced anyway.\n"), stderr);
			return;
		}
		goto abort_mke2fs;
	}
}
示例#2
0
文件: util.c 项目: Ayyayay/busybox
void check_mount(const char *device, int force, const char *type)
{
	errcode_t retval;
	int mount_flags;

	retval = ext2fs_check_if_mounted(device, &mount_flags);
	if (retval) {
		bb_error_msg("can't determine if %s is mounted", device);
		return;
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		bb_error_msg("%s is mounted !", device);
force_check:
		if (force)
			bb_error_msg("badblocks forced anyways");
		else
			bb_error_msg_and_die("it's not safe to run badblocks!");
	}

	if (mount_flags & EXT2_MF_BUSY) {
		bb_error_msg("%s is apparently in use by the system", device);
		goto force_check;
	}

}
static void check_mount(e2fsck_t ctx)
{
	errcode_t	retval;
	int		cont;

	retval = ext2fs_check_if_mounted(ctx->filesystem_name,
					 &ctx->mount_flags);
	if (retval) {
		com_err("ext2fs_check_if_mount", retval,
			_("while determining whether %s is mounted."),
			ctx->filesystem_name);
		return;
	}

	/*
	 * If the filesystem isn't mounted, or it's the root
	 * filesystem and it's mounted read-only, and we're not doing
	 * a read/write check, then everything's fine.
	 */
	if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
	    ((ctx->mount_flags & EXT2_MF_ISROOT) &&
	     (ctx->mount_flags & EXT2_MF_READONLY) &&
	     !(ctx->options & E2F_OPT_WRITECHECK)))
		return;

	if ((ctx->options & E2F_OPT_READONLY) &&
	    !(ctx->options & E2F_OPT_WRITECHECK)) {
		printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
		return;
	}

	printf(_("%s is mounted.  "), ctx->filesystem_name);
	if (!ctx->interactive)
		fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
	printf(_("\n\n\007\007\007\007WARNING!!!  "
	       "The filesystem is mounted.   If you continue you ***WILL***\n"
	       "cause ***SEVERE*** filesystem damage.\007\007\007\n\n"));
	cont = ask_yn(_("Do you really want to continue"), -1);
	if (!cont) {
		printf (_("check aborted.\n"));
		exit (0);
	}
	return;
}
示例#4
0
void e2fsck_move_ext3_journal(e2fsck_t ctx)
{
	struct ext2_super_block *sb = ctx->fs->super;
	struct problem_context	pctx;
	struct ext2_inode 	inode;
	ext2_filsys		fs = ctx->fs;
	ext2_ino_t		ino;
	errcode_t		retval;
	const char * const *	cpp;
	int			group, mount_flags;
	
	clear_problem_context(&pctx);

	/*
	 * If the filesystem is opened read-only, or there is no
	 * journal, then do nothing.
	 */
	if ((ctx->options & E2F_OPT_READONLY) ||
	    (sb->s_journal_inum == 0) ||
	    !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
		return;

	/*
	 * Read in the journal inode
	 */
	if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0)
		return;

	/*
	 * If it's necessary to backup the journal inode, do so.
	 */
	if ((sb->s_jnl_backup_type == 0) ||
	    ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) &&
	     memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) {
		if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) {
			memcpy(sb->s_jnl_blocks, inode.i_block,
			       EXT2_N_BLOCKS*4);
			sb->s_jnl_blocks[16] = inode.i_size;
			sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
			ext2fs_mark_super_dirty(fs);
			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
		}
	}

	/*
	 * If the journal is already the hidden inode, then do nothing
	 */
	if (sb->s_journal_inum == EXT2_JOURNAL_INO)
		return;
	
	/*
	 * The journal inode had better have only one link and not be readable.
	 */
	if (inode.i_links_count != 1)
		return;

	/*
	 * If the filesystem is mounted, or we can't tell whether
	 * or not it's mounted, do nothing.
	 */
	retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags);
	if (retval || (mount_flags & EXT2_MF_MOUNTED))
		return;

	/*
	 * If we can't find the name of the journal inode, then do
	 * nothing.
	 */
	for (cpp = journal_names; *cpp; cpp++) {
		retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp,
				       strlen(*cpp), 0, &ino);
		if ((retval == 0) && (ino == sb->s_journal_inum))
			break;
	}
	if (*cpp == 0)
		return;

	/* We need the inode bitmap to be loaded */
	retval = ext2fs_read_bitmaps(fs);
	if (retval)
		return;

	pctx.str = *cpp;
	if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx))
		return;
		
	/*
	 * OK, we've done all the checks, let's actually move the
	 * journal inode.  Errors at this point mean we need to force
	 * an ext2 filesystem check.
	 */
	if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0)
		goto err_out;
	if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0)
		goto err_out;
	sb->s_journal_inum = EXT2_JOURNAL_INO;
	ext2fs_mark_super_dirty(fs);
	fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
	inode.i_links_count = 0;
	inode.i_dtime = ctx->now;
	if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0)
		goto err_out;

	group = ext2fs_group_of_ino(fs, ino);
	ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
	ext2fs_mark_ib_dirty(fs);
	fs->group_desc[group].bg_free_inodes_count++;
	fs->super->s_free_inodes_count++;
	return;

err_out:
	pctx.errcode = retval;
	fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx);
	fs->super->s_state &= ~EXT2_VALID_FS;
	ext2fs_mark_super_dirty(fs);
	return;
}
示例#5
0
int main(int argc, char *argv[])
{
	int c,force = 0;
	TDB_CONTEXT *tdb;
	TDB_DATA key, data;
	io_channel channel;
	errcode_t retval;
	int  mount_flags;
	blk64_t  blk_num;
	char *device_name, *tdb_file;
	io_manager manager = unix_io_manager;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif
	add_error_table(&et_ext2_error_table);

	prg_name = argv[0];
	while((c = getopt(argc, argv, "f")) != EOF) {
		switch (c) {
			case 'f':
				force = 1;
				break;
			default:
				usage(prg_name);
		}
	}

	if (argc != optind+2)
		usage(prg_name);

	tdb_file = argv[optind];
	device_name = argv[optind+1];

	tdb = tdb_open(tdb_file, 0, 0, O_RDONLY, 0600);

	if (!tdb) {
		com_err(prg_name, errno,
				_("Failed tdb_open %s\n"), tdb_file);
		exit(1);
	}

	retval = ext2fs_check_if_mounted(device_name, &mount_flags);
	if (retval) {
		com_err(prg_name, retval, _("Error while determining whether "
				"%s is mounted.\n"), device_name);
		exit(1);
	}

	if (mount_flags & EXT2_MF_MOUNTED) {
		com_err(prg_name, retval, _("e2undo should only be run on "
				"unmounted file system\n"));
		exit(1);
	}

	retval = manager->open(device_name,
				IO_FLAG_EXCLUSIVE | IO_FLAG_RW,  &channel);
	if (retval) {
		com_err(prg_name, retval,
				_("Failed to open %s\n"), device_name);
		exit(1);
	}

	if (!force && check_filesystem(tdb, channel)) {
		exit(1);
	}

	if (set_blk_size(tdb, channel)) {
		exit(1);
	}

	for (key = tdb_firstkey(tdb); key.dptr; key = tdb_nextkey(tdb, key)) {
		if (!strcmp((char *) key.dptr, (char *) mtime_key) ||
		    !strcmp((char *) key.dptr, (char *) uuid_key) ||
		    !strcmp((char *) key.dptr, (char *) blksize_key)) {
			continue;
		}

		data = tdb_fetch(tdb, key);
		if (!data.dptr) {
			com_err(prg_name, 0,
				_("Failed tdb_fetch %s\n"), tdb_errorstr(tdb));
			exit(1);
		}
		blk_num = *(unsigned long *)key.dptr;
		printf(_("Replayed transaction of size %zd at location %llu\n"),
							data.dsize, blk_num);
		retval = io_channel_write_blk64(channel, blk_num,
						-data.dsize, data.dptr);
		if (retval == -1) {
			com_err(prg_name, retval,
					_("Failed write %s\n"),
					strerror(errno));
			exit(1);
		}
	}
	io_channel_close(channel);
	tdb_close(tdb);

	return 0;
}
示例#6
0
int main(int argc, char *argv[])
{
	int c, force = 0, dry_run = 0, verbose = 0, dump = 0;
	io_channel channel;
	errcode_t retval;
	int mount_flags, csum_error = 0, io_error = 0;
	size_t i, keys_per_block;
	char *device_name, *tdb_file;
	io_manager manager = unix_io_manager;
	struct undo_context undo_ctx;
	char *buf;
	struct undo_key_block *keyb;
	struct undo_key *dkey;
	struct undo_key_info *ikey;
	__u32 key_crc, blk_crc, hdr_crc;
	blk64_t lblk;
	ext2_filsys fs;
	__u64 offset = 0;
	char opt_offset_string[40] = { 0 };

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
	set_com_err_gettext(gettext);
#endif
	add_error_table(&et_ext2_error_table);

	prg_name = argv[0];
	while ((c = getopt(argc, argv, "fhno:vz:")) != EOF) {
		switch (c) {
		case 'f':
			force = 1;
			break;
		case 'h':
			dump = 1;
			break;
		case 'n':
			dry_run = 1;
			break;
		case 'o':
			offset = strtoull(optarg, &buf, 0);
			if (*buf) {
				com_err(prg_name, 0,
						_("illegal offset - %s"), optarg);
				exit(1);
			}
			/* used to indicate that an offset was specified */
			opt_offset_string[0] = 1;
			break;
		case 'v':
			verbose = 1;
			break;
		case 'z':
			undo_file = optarg;
			break;
		default:
			usage();
		}
	}

	if (argc != optind + 2)
		usage();

	tdb_file = argv[optind];
	device_name = argv[optind+1];

	if (undo_file && strcmp(tdb_file, undo_file) == 0) {
		printf(_("Will not write to an undo file while replaying it.\n"));
		exit(1);
	}

	/* Interpret the undo file */
	retval = manager->open(tdb_file, IO_FLAG_EXCLUSIVE,
			       &undo_ctx.undo_file);
	if (retval) {
		com_err(prg_name, errno,
				_("while opening undo file `%s'\n"), tdb_file);
		exit(1);
	}
	retval = io_channel_read_blk64(undo_ctx.undo_file, 0,
				       -(int)sizeof(undo_ctx.hdr),
				       &undo_ctx.hdr);
	if (retval) {
		com_err(prg_name, retval, _("while reading undo file"));
		exit(1);
	}
	if (memcmp(undo_ctx.hdr.magic, E2UNDO_MAGIC,
		    sizeof(undo_ctx.hdr.magic))) {
		fprintf(stderr, _("%s: Not an undo file.\n"), tdb_file);
		exit(1);
	}
	if (dump) {
		dump_header(&undo_ctx.hdr);
		exit(1);
	}
	hdr_crc = ext2fs_crc32c_le(~0, (unsigned char *)&undo_ctx.hdr,
				   sizeof(struct undo_header) -
				   sizeof(__u32));
	if (!force && ext2fs_le32_to_cpu(undo_ctx.hdr.header_crc) != hdr_crc) {
		fprintf(stderr, _("%s: Header checksum doesn't match.\n"),
			tdb_file);
		exit(1);
	}
	undo_ctx.blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.block_size);
	undo_ctx.fs_blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.fs_block_size);
	if (undo_ctx.blocksize == 0 || undo_ctx.fs_blocksize == 0) {
		fprintf(stderr, _("%s: Corrupt undo file header.\n"), tdb_file);
		exit(1);
	}
	if (!force && undo_ctx.blocksize > E2UNDO_MAX_BLOCK_SIZE) {
		fprintf(stderr, _("%s: Undo block size too large.\n"),
			tdb_file);
		exit(1);
	}
	if (!force && undo_ctx.blocksize < E2UNDO_MIN_BLOCK_SIZE) {
		fprintf(stderr, _("%s: Undo block size too small.\n"),
			tdb_file);
		exit(1);
	}
	undo_ctx.super_block = ext2fs_le64_to_cpu(undo_ctx.hdr.super_offset);
	undo_ctx.num_keys = ext2fs_le64_to_cpu(undo_ctx.hdr.num_keys);
	io_channel_set_blksize(undo_ctx.undo_file, undo_ctx.blocksize);
	/*
	 * Do not compare undo_ctx.hdr.f_compat with the available compatible
	 * features set, because a "missing" compatible feature should
	 * not cause any problems.
	 */
	if (!force && (undo_ctx.hdr.f_incompat || undo_ctx.hdr.f_rocompat)) {
		fprintf(stderr, _("%s: Unknown undo file feature set.\n"),
			tdb_file);
		exit(1);
	}

	/* open the fs */
	retval = ext2fs_check_if_mounted(device_name, &mount_flags);
	if (retval) {
		com_err(prg_name, retval, _("Error while determining whether "
				"%s is mounted."), device_name);
		exit(1);
	}

	if (mount_flags & EXT2_MF_MOUNTED) {
		com_err(prg_name, retval, "%s", _("e2undo should only be run "
						"on unmounted filesystems"));
		exit(1);
	}

	if (undo_file) {
		retval = e2undo_setup_tdb(device_name, &manager);
		if (retval)
			exit(1);
	}

	retval = manager->open(device_name,
			       IO_FLAG_EXCLUSIVE | (dry_run ? 0 : IO_FLAG_RW),
			       &channel);
	if (retval) {
		com_err(prg_name, retval,
				_("while opening `%s'"), device_name);
		exit(1);
	}

	if (*opt_offset_string || e2undo_has_feature_fs_offset(&undo_ctx.hdr)) {
		if (!*opt_offset_string)
			offset = ext2fs_le64_to_cpu(undo_ctx.hdr.fs_offset);
		retval = snprintf(opt_offset_string, sizeof(opt_offset_string),
						  "offset=%llu", offset);
		if ((size_t) retval >= sizeof(opt_offset_string)) {
			/* should not happen... */
			com_err(prg_name, 0, _("specified offset is too large"));
			exit(1);
		}
		io_channel_set_options(channel, opt_offset_string);
	}

	if (!force && check_filesystem(&undo_ctx, channel))
		exit(1);

	/* prepare to read keys */
	retval = ext2fs_get_mem(sizeof(struct undo_key_info) * undo_ctx.num_keys,
				&undo_ctx.keys);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}
	ikey = undo_ctx.keys;
	retval = ext2fs_get_mem(undo_ctx.blocksize, &keyb);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}
	retval = ext2fs_get_mem(E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize,
				&buf);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}

	/* load keys */
	keys_per_block = KEYS_PER_BLOCK(&undo_ctx);
	lblk = ext2fs_le64_to_cpu(undo_ctx.hdr.key_offset);
	dbg_printf("nr_keys=%lu, kpb=%zu, blksz=%u\n",
		   undo_ctx.num_keys, keys_per_block, undo_ctx.blocksize);
	for (i = 0; i < undo_ctx.num_keys; i += keys_per_block) {
		size_t j, max_j;
		__le32 crc;

		retval = io_channel_read_blk64(undo_ctx.undo_file,
					       lblk, 1, keyb);
		if (retval) {
			com_err(prg_name, retval, "%s", _("while reading keys"));
			if (force) {
				io_error = 1;
				undo_ctx.num_keys = i - 1;
				break;
			}
			exit(1);
		}

		/* check keys */
		if (!force &&
		    ext2fs_le32_to_cpu(keyb->magic) != KEYBLOCK_MAGIC) {
			fprintf(stderr, _("%s: wrong key magic at %llu\n"),
				tdb_file, lblk);
			exit(1);
		}
		crc = keyb->crc;
		keyb->crc = 0;
		key_crc = ext2fs_crc32c_le(~0, (unsigned char *)keyb,
					   undo_ctx.blocksize);
		if (!force && ext2fs_le32_to_cpu(crc) != key_crc) {
			fprintf(stderr,
				_("%s: key block checksum error at %llu.\n"),
				tdb_file, lblk);
			exit(1);
		}

		/* load keys from key block */
		lblk++;
		max_j = undo_ctx.num_keys - i;
		if (max_j > keys_per_block)
			max_j = keys_per_block;
		for (j = 0, dkey = keyb->keys;
		     j < max_j;
		     j++, ikey++, dkey++) {
			ikey->fsblk = ext2fs_le64_to_cpu(dkey->fsblk);
			ikey->fileblk = lblk;
			ikey->blk_crc = ext2fs_le32_to_cpu(dkey->blk_crc);
			ikey->size = ext2fs_le32_to_cpu(dkey->size);
			lblk += (ikey->size + undo_ctx.blocksize - 1) /
				undo_ctx.blocksize;

			if (E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize <
			    ikey->size) {
				com_err(prg_name, retval,
					_("%s: block %llu is too long."),
					tdb_file, ikey->fsblk);
				exit(1);
			}

			/* check each block's crc */
			retval = io_channel_read_blk64(undo_ctx.undo_file,
						       ikey->fileblk,
						       -(int)ikey->size,
						       buf);
			if (retval) {
				com_err(prg_name, retval,
					_("while fetching block %llu."),
					ikey->fileblk);
				if (!force)
					exit(1);
				io_error = 1;
				continue;
			}

			blk_crc = ext2fs_crc32c_le(~0, (unsigned char *)buf,
						   ikey->size);
			if (blk_crc != ikey->blk_crc) {
				fprintf(stderr,
					_("checksum error in filesystem block "
					  "%llu (undo blk %llu)\n"),
					ikey->fsblk, ikey->fileblk);
				if (!force)
					exit(1);
				csum_error = 1;
			}
		}
	}
	ext2fs_free_mem(&keyb);

	/* sort keys in fs block order */
	qsort(undo_ctx.keys, undo_ctx.num_keys, sizeof(struct undo_key_info),
	      key_compare);

	/* replay */
	io_channel_set_blksize(channel, undo_ctx.fs_blocksize);
	for (i = 0, ikey = undo_ctx.keys; i < undo_ctx.num_keys; i++, ikey++) {
		retval = io_channel_read_blk64(undo_ctx.undo_file,
					       ikey->fileblk,
					       -(int)ikey->size,
					       buf);
		if (retval) {
			com_err(prg_name, retval,
				_("while fetching block %llu."),
				ikey->fileblk);
			io_error = 1;
			continue;
		}

		if (verbose)
			printf("Replayed block of size %u from %llu to %llu\n",
				ikey->size, ikey->fileblk, ikey->fsblk);
		if (dry_run)
			continue;
		retval = io_channel_write_blk64(channel, ikey->fsblk,
						-(int)ikey->size, buf);
		if (retval) {
			com_err(prg_name, retval,
				_("while writing block %llu."), ikey->fsblk);
			io_error = 1;
		}
	}

	if (csum_error)
		fprintf(stderr, _("Undo file corruption; run e2fsck NOW!\n"));
	if (io_error)
		fprintf(stderr, _("IO error during replay; run e2fsck NOW!\n"));
	if (!(ext2fs_le32_to_cpu(undo_ctx.hdr.state) & E2UNDO_STATE_FINISHED)) {
		force = 1;
		fprintf(stderr, _("Incomplete undo record; run e2fsck.\n"));
	}
	ext2fs_free_mem(&buf);
	ext2fs_free_mem(&undo_ctx.keys);
	io_channel_close(channel);

	/* If there were problems, try to force a fsck */
	if (!dry_run && (force || csum_error || io_error)) {
		retval = ext2fs_open2(device_name, NULL,
				   EXT2_FLAG_RW | EXT2_FLAG_64BITS, 0, 0,
				   manager, &fs);
		if (retval)
			goto out;
		fs->super->s_state &= ~EXT2_VALID_FS;
		if (csum_error || io_error)
			fs->super->s_state |= EXT2_ERROR_FS;
		ext2fs_mark_super_dirty(fs);
		ext2fs_close_free(&fs);
	}

out:
	io_channel_close(undo_ctx.undo_file);

	return csum_error;
}