1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#define _LARGEFILE64_SOURCE
30
31#include <fcntl.h>
32#include <dlfcn.h>
33
34#include <f2fs_fs.h>
35#include <f2fs_format_utils.h>
36
37#include <sparse/sparse.h>
38
39struct selabel_handle;
40
41#include "make_f2fs.h"
42
43extern void flush_sparse_buffs();
44
45struct f2fs_configuration config;
46struct sparse_file *f2fs_sparse_file;
47extern int dlopenf2fs();
48
49static void reset_f2fs_info() {
50	// Reset all the global data structures used by make_f2fs so it
51	// can be called again.
52	memset(&config, 0, sizeof(config));
53	config.fd = -1;
54	if (f2fs_sparse_file) {
55		sparse_file_destroy(f2fs_sparse_file);
56		f2fs_sparse_file = NULL;
57	}
58}
59
60int make_f2fs_sparse_fd(int fd, long long len,
61		const char *mountpoint, struct selabel_handle *sehnd)
62{
63	if (dlopenf2fs() < 0) {
64		return -1;
65	}
66	reset_f2fs_info();
67	f2fs_init_configuration(&config);
68	len &= ~((__u64)F2FS_BLKSIZE);
69	config.total_sectors = len / config.sector_size;
70	config.start_sector = 0;
71	f2fs_sparse_file = sparse_file_new(F2FS_BLKSIZE, len);
72	f2fs_format_device();
73	sparse_file_write(f2fs_sparse_file, fd, /*gzip*/0, /*sparse*/1, /*crc*/0);
74	sparse_file_destroy(f2fs_sparse_file);
75	flush_sparse_buffs();
76	f2fs_sparse_file = NULL;
77	return 0;
78}
79