2 * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
18 #include <sys/mount.h>
19 #include <mtd/mtd-user.h>
30 #include <libubox/list.h>
31 #include <libubox/blob.h>
32 #include <libubox/md5.h>
34 #include "libfstools/libfstools.h"
35 #include "libfstools/volume.h"
36 #include "libfstools/snapshot.h"
39 config_write(int argc
, char **argv
)
41 struct volume
*v
= volume_find("rootfs_data");
47 ret
= volatile_write(v
, 0);
49 ret
= sentinel_write(v
, 0);
55 config_read(int argc
, char **argv
)
57 struct volume
*v
= volume_find("rootfs_data");
58 struct file_header conf
, sentinel
;
59 int next
, block
, ret
= 0;
65 block
= config_find(v
, &conf
, &sentinel
);
66 next
= snapshot_next_free(v
, &seq
);
67 if (is_config(&conf
) && conf
.seq
== seq
)
69 else if (!is_config(&sentinel
) || sentinel
.seq
!= seq
)
72 unlink("/tmp/config.tar.gz");
73 ret
= snapshot_read_file(v
, block
, "/tmp/config.tar.gz", CONF
);
76 fprintf(stderr
, "failed to read /tmp/config.tar.gz\n");
82 snapshot_write(int argc
, char **argv
)
84 struct volume
*v
= volume_find("rootfs_data");
91 block
= snapshot_next_free(v
, &seq
);
95 ret
= snapshot_write_file(v
, block
, "/tmp/snapshot.tar.gz", seq
+ 1, DATA
);
97 fprintf(stderr
, "failed to write /tmp/snapshot.tar.gz\n");
99 fprintf(stderr
, "wrote /tmp/snapshot.tar.gz\n");
105 snapshot_mark(int argc
, char **argv
)
107 __be32 owrt
= cpu_to_be32(OWRT
);
112 fprintf(stderr
, "This will remove all snapshot data stored on the system. Are you sure? [N/y]\n");
113 if (getchar() != 'y')
116 v
= volume_find("rootfs_data");
118 fprintf(stderr
, "no rootfs_data was found\n");
122 fd
= open(v
->blk
, O_WRONLY
);
123 fprintf(stderr
, "%s - marking with 0x%08x\n", v
->blk
, owrt
);
125 fprintf(stderr
, "opening %s failed\n", v
->blk
);
129 sz
= write(fd
, &owrt
, sizeof(owrt
));
133 fprintf(stderr
, "writing %s failed: %s\n", v
->blk
, strerror(errno
));
141 snapshot_read(int argc
, char **argv
)
143 struct volume
*v
= volume_find("rootfs_data");;
144 int block
= 0, ret
= 0;
151 block
= atoi(argv
[2]);
152 if (block
>= (v
->size
/ v
->block_size
)) {
153 fprintf(stderr
, "invalid block %d > %" PRIu64
"\n",
154 block
, (uint64_t) v
->size
/ v
->block_size
);
157 snprintf(file
, sizeof(file
), "/tmp/snapshot/block%d.tar.gz", block
);
159 ret
= snapshot_read_file(v
, block
, file
, DATA
);
164 snprintf(file
, sizeof(file
), "/tmp/snapshot/block%d.tar.gz", block
);
165 block
= snapshot_read_file(v
, block
, file
, DATA
);
175 struct volume
*v
= volume_find("rootfs_data");
176 struct file_header hdr
= { 0 }, conf
;
182 fprintf(stderr
, "sectors:\t%" PRIu64
", block_size:\t%dK\n",
183 (uint64_t) v
->size
/ v
->block_size
, v
->block_size
/ 1024);
185 if (volume_read(v
, &hdr
, block
* v
->block_size
, sizeof(struct file_header
))) {
186 fprintf(stderr
, "scanning for next free block failed\n");
192 if (hdr
.magic
!= OWRT
)
195 if (hdr
.type
== DATA
)
196 fprintf(stderr
, "block %d:\tsnapshot entry, size: %d, sectors: %d, sequence: %d\n", block
, hdr
.length
, pad_file_size(v
, hdr
.length
) / v
->block_size
, hdr
.seq
);
197 else if (hdr
.type
== CONF
)
198 fprintf(stderr
, "block %d:\tvolatile entry, size: %d, sectors: %d, sequence: %d\n", block
, hdr
.length
, pad_file_size(v
, hdr
.length
) / v
->block_size
, hdr
.seq
);
200 if (hdr
.type
== DATA
&& !valid_file_size(hdr
.length
))
201 block
+= pad_file_size(v
, hdr
.length
) / v
->block_size
;
202 } while (hdr
.type
== DATA
);
203 block
= config_find(v
, &conf
, &hdr
);
205 fprintf(stderr
, "block %d:\tsentinel entry, size: %d, sectors: %d, sequence: %d\n", block
, hdr
.length
, pad_file_size(v
, hdr
.length
) / v
->block_size
, hdr
.seq
);
210 int main(int argc
, char **argv
)
215 if (!strcmp(argv
[1], "config_read"))
216 return config_read(argc
, argv
);
217 if (!strcmp(argv
[1], "config_write"))
218 return config_write(argc
, argv
);
219 if (!strcmp(argv
[1], "read"))
220 return snapshot_read(argc
, argv
);
221 if (!strcmp(argv
[1], "write"))
222 return snapshot_write(argc
, argv
);
223 if (!strcmp(argv
[1], "mark"))
224 return snapshot_mark(argc
, argv
);
225 if (!strcmp(argv
[1], "info"))
226 return snapshot_info();