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
50 struct selabel_handle;
51
52 #include "make_f2fs.h"
53
54 #ifdef USE_MINGW
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
86 struct f2fs_configuration config;
87 struct sparse_file *f2fs_sparse_file;
88
89 struct buf_item {
90 void *buf;
91 size_t len;
92 struct buf_item *next;
93 };
94
95 struct buf_item *buf_list;
96
dev_write_fd(void * buf,__u64 offset,size_t len)97 static 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
flush_sparse_buffs()109 void 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
dev_write_sparse(void * buf,__u64 byte_offset,size_t byte_len)119 static 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
f2fs_finalize_device(struct f2fs_configuration * c)141 void f2fs_finalize_device(struct f2fs_configuration *c)
142 {
143 }
144
f2fs_trim_device()145 int f2fs_trim_device()
146 {
147 return 0;
148 }
149
150 /*
151 * IO interfaces
152 */
dev_read_version(void * buf,__u64 offset,size_t len)153 int dev_read_version(void *buf, __u64 offset, size_t len)
154 {
155 return 0;
156 }
157
dev_read(void * buf,__u64 offset,size_t len)158 int dev_read(void *buf, __u64 offset, size_t len)
159 {
160 return 0;
161 }
162
dev_write(void * buf,__u64 offset,size_t len)163 int 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
dev_fill(void * buf,__u64 offset,size_t len)173 int 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
dev_read_block(void * buf,__u64 blk_addr)184 int dev_read_block(void *buf, __u64 blk_addr)
185 {
186 assert(false); // Must not be invoked.
187 return 0;
188 }
189
dev_read_blocks(void * buf,__u64 addr,__u32 nr_blks)190 int dev_read_blocks(void *buf, __u64 addr, __u32 nr_blks)
191 {
192 assert(false); // Must not be invoked.
193 return 0;
194 }
195
196