C++ (Cpp) btrfs_set_super_log_root_level Examples

Example #1

File: btrfs-zero-log.c Project: AnupBansod/assignments

int main(int ac, char **av)
{
	struct btrfs_root *root;
	struct btrfs_trans_handle *trans;
	int ret;

	if (ac != 2)
		print_usage();

	radix_tree_init();

	if((ret = check_mounted(av[1])) < 0) {
		fprintf(stderr, "Could not check mount status: %s\n", strerror(-ret));
		goto out;
	} else if(ret) {
		fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]);
		ret = -EBUSY;
		goto out;
	}

	root = open_ctree(av[1], 0, OPEN_CTREE_WRITES);

	if (root == NULL)
		return 1;

	trans = btrfs_start_transaction(root, 1);
	btrfs_set_super_log_root(root->fs_info->super_copy, 0);
	btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
	btrfs_commit_transaction(trans, root);
	close_ctree(root);
out:
	return !!ret;
}

Example #2

File: cmds-rescue.c Project: hhoffstaette/btrfs-progs

static int cmd_rescue_zero_log(int argc, char **argv)
{
	struct btrfs_root *root;
	struct btrfs_trans_handle *trans;
	struct btrfs_super_block *sb;
	char *devname;
	int ret;

	clean_args_no_options(argc, argv, cmd_rescue_zero_log_usage);

	if (check_argc_exact(argc, 2))
		usage(cmd_rescue_zero_log_usage);

	devname = argv[optind];
	ret = check_mounted(devname);
	if (ret < 0) {
		errno = -ret;
		error("could not check mount status: %m");
		goto out;
	} else if (ret) {
		error("%s is currently mounted", devname);
		ret = -EBUSY;
		goto out;
	}

	root = open_ctree(devname, 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
	if (!root) {
		error("could not open ctree");
		return 1;
	}

	sb = root->fs_info->super_copy;
	printf("Clearing log on %s, previous log_root %llu, level %u\n",
			devname,
			(unsigned long long)btrfs_super_log_root(sb),
			(unsigned)btrfs_super_log_root_level(sb));
	trans = btrfs_start_transaction(root, 1);
	BUG_ON(IS_ERR(trans));
	btrfs_set_super_log_root(sb, 0);
	btrfs_set_super_log_root_level(sb, 0);
	btrfs_commit_transaction(trans, root);
	close_ctree(root);

out:
	return !!ret;
}

Example #3

File: btrfs-zero-log.c Project: fougner/btrfs-progs

int main(int ac, char **av)
{
	struct btrfs_root *root;
	struct btrfs_trans_handle *trans;
	struct btrfs_super_block *sb;
	int ret;

	set_argv0(av);
	if (check_argc_exact(ac, 2))
		print_usage();

	radix_tree_init();

	printf("WARNING: this utility is deprecated, please use 'btrfs rescue zero-log'\n\n");

	if ((ret = check_mounted(av[1])) < 0) {
		fprintf(stderr, "ERROR: could not check mount status: %s\n", strerror(-ret));
		goto out;
	} else if (ret) {
		fprintf(stderr, "ERROR: %s is currently mounted\n", av[1]);
		ret = -EBUSY;
		goto out;
	}

	root = open_ctree(av[1], 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
	if (!root) {
		fprintf(stderr, "ERROR: cannot open ctree\n");
		return 1;
	}

	sb = root->fs_info->super_copy;
	printf("Clearing log on %s, previous log_root %llu, level %u\n",
			av[1],
			(unsigned long long)btrfs_super_log_root(sb),
			(unsigned)btrfs_super_log_root_level(sb));
	trans = btrfs_start_transaction(root, 1);
	btrfs_set_super_log_root(root->fs_info->super_copy, 0);
	btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
	btrfs_commit_transaction(trans, root);
	close_ctree(root);
out:
	return !!ret;
}