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 <assert.h>
32#include <asm/types.h>
33#include <dlfcn.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <linux/fs.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>  /* memset() */
40#include <sys/param.h>
41#include <sys/stat.h>
42#include <sys/types.h>
43#include <unistd.h>
44
45#include <f2fs_fs.h>
46#include <f2fs_format_utils.h>
47
48#include <sparse/sparse.h>
49
50struct selabel_handle;
51
52#include "make_f2fs.h"
53
54#ifdef _WIN32
55
56#include <winsock2.h>
57
58/* These match the Linux definitions of these flags.
59   L_xx is defined to avoid conflicting with the win32 versions.
60*/
61#define L_S_IRUSR 00400
62#define L_S_IWUSR 00200
63#define L_S_IXUSR 00100
64#define S_IRWXU (L_S_IRUSR | L_S_IWUSR | L_S_IXUSR)
65#define S_IRGRP 00040
66#define S_IWGRP 00020
67#define S_IXGRP 00010
68#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
69#define S_IROTH 00004
70#define S_IWOTH 00002
71#define S_IXOTH 00001
72#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
73#define S_ISUID 0004000
74#define S_ISGID 0002000
75#define S_ISVTX 0001000
76
77#else
78
79#include <selinux/selinux.h>
80#include <selinux/label.h>
81
82#define O_BINARY 0
83
84#endif
85
86struct f2fs_configuration config;
87struct sparse_file *f2fs_sparse_file;
88
89struct buf_item {
90	void *buf;
91	size_t len;
92	struct buf_item *next;
93};
94
95struct buf_item *buf_list;
96
97static int dev_write_fd(void *buf, __u64 offset, size_t len)
98{
99	if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
100		return -1;
101	ssize_t written = write(config.fd, buf, len);
102	if (written == -1)
103		return -1;
104	if ((size_t)written != len)
105		return -1;
106	return 0;
107}
108
109void flush_sparse_buffs()
110{
111	while (buf_list) {
112		struct buf_item *bi = buf_list;
113		buf_list = buf_list->next;
114		free(bi->buf);
115		free(bi);
116	}
117}
118
119static int dev_write_sparse(void *buf, __u64 byte_offset, size_t byte_len)
120{
121	struct buf_item *bi = calloc(1, sizeof(struct buf_item));
122
123	if (bi == NULL) {
124		return -ENOMEM;
125	}
126	bi->buf = malloc(byte_len);
127	if (bi->buf == NULL) {
128		free(bi);
129		return -ENOMEM;
130	}
131
132	bi->len = byte_len;
133	memcpy(bi->buf, buf, byte_len);
134	bi->next = buf_list;
135	buf_list = bi;
136
137	sparse_file_add_data(f2fs_sparse_file, bi->buf, byte_len, byte_offset/F2FS_BLKSIZE);
138	return 0;
139}
140
141void f2fs_finalize_device(struct f2fs_configuration *c)
142{
143}
144
145int f2fs_trim_device()
146{
147	return 0;
148}
149
150/*
151 * IO interfaces
152 */
153int dev_read_version(void *buf, __u64 offset, size_t len)
154{
155        return 0;
156}
157
158int dev_read(void  *buf, __u64 offset, size_t len)
159{
160	return 0;
161}
162
163int dev_write(void *buf, __u64 offset, size_t len)
164{
165	if (config.fd >= 0) {
166		return dev_write_fd(buf, offset, len);
167	} else {
168		return dev_write_sparse(buf, offset, len);
169	}
170}
171
172
173int dev_fill(void *buf, __u64 offset, size_t len)
174{
175	int ret;
176	if (config.fd >= 0) {
177		return dev_write_fd(buf, offset, len);
178	}
179        // sparse file fills with zero by default.
180	// return sparse_file_add_fill(f2fs_sparse_file, ((__u8*)(bi->buf))[0], byte_len, byte_offset/F2FS_BLKSIZE);
181	return 0;
182}
183
184int dev_read_block(void *buf, __u64 blk_addr)
185{
186	assert(false); // Must not be invoked.
187	return 0;
188}
189
190int dev_read_blocks(void *buf, __u64 addr, __u32 nr_blks)
191{
192	assert(false); // Must not be invoked.
193	return 0;
194}
195
196