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 <string.h>
33
34 #include <f2fs_fs.h>
35 #include <f2fs_format_utils.h>
36
37 #include <sparse/sparse.h>
38
39 struct selabel_handle;
40
41 #include "make_f2fs.h"
42
43 extern void flush_sparse_buffs();
44
45 struct f2fs_configuration config;
46 struct sparse_file *f2fs_sparse_file;
47 extern int dlopenf2fs();
48
reset_f2fs_info()49 static 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
make_f2fs_sparse_fd(int fd,long long len,const char * mountpoint,struct selabel_handle * sehnd)60 int 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