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/*
* Copyright (C) 2014 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <mtd/mtd-user.h>
#include <glob.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <libgen.h>
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include <libubox/list.h>
#include <libubox/blob.h>
#include <libubox/md5.h>
#include <libubox/ulog.h>
#include "libfstools/libfstools.h"
#include "libfstools/volume.h"
#include "libfstools/snapshot.h"
static int
config_write(int argc, char **argv)
{
struct volume *v = volume_find("rootfs_data");
int ret;
if (!v)
return -1;
volume_init(v);
ret = volatile_write(v, 0);
if (!ret)
ret = sentinel_write(v, 0);
return ret;
}
static int
config_read(int argc, char **argv)
{
struct volume *v = volume_find("rootfs_data");
struct file_header conf, sentinel;
int next, block, ret = 0;
uint32_t seq;
if (!v)
return -1;
volume_init(v);
block = config_find(v, &conf, &sentinel);
next = snapshot_next_free(v, &seq);
if (is_config(&conf) && conf.seq == seq)
block = next;
else if (!is_config(&sentinel) || sentinel.seq != seq)
return -1;
unlink("/tmp/config.tar.gz");
ret = snapshot_read_file(v, block, "/tmp/config.tar.gz", CONF);
if (ret < 1)
ULOG_ERR("failed to read /tmp/config.tar.gz\n");
return ret;
}
static int
snapshot_write(int argc, char **argv)
{
struct volume *v = volume_find("rootfs_data");
int block, ret;
uint32_t seq;
if (!v)
return -1;
volume_init(v);
block = snapshot_next_free(v, &seq);
if (block < 0)
block = 0;
ret = snapshot_write_file(v, block, "/tmp/snapshot.tar.gz", seq + 1, DATA);
if (ret)
ULOG_ERR("failed to write /tmp/snapshot.tar.gz\n");
else
ULOG_INFO("wrote /tmp/snapshot.tar.gz\n");
return ret;
}
static int
snapshot_mark(int argc, char **argv)
{
__be32 owrt = cpu_to_be32(OWRT);
struct volume *v;
size_t sz;
int fd;
ULOG_WARN("This will remove all snapshot data stored on the system. Are you sure? [N/y]\n");
if (getchar() != 'y')
return -1;
v = volume_find("rootfs_data");
if (!v) {
ULOG_ERR("MTD partition 'rootfs_data' not found\n");
return -1;
}
volume_init(v);
fd = open(v->blk, O_WRONLY);
ULOG_INFO("%s - marking with 0x%08x\n", v->blk, owrt);
if (fd < 0) {
ULOG_ERR("opening %s failed\n", v->blk);
return -1;
}
sz = write(fd, &owrt, sizeof(owrt));
close(fd);
if (sz != 1) {
ULOG_ERR("writing %s failed: %m\n", v->blk);
return -1;
}
return 0;
}
static int
snapshot_read(int argc, char **argv)
{
struct volume *v = volume_find("rootfs_data");;
int block = 0, ret = 0;
char file[64];
if (!v)
return -1;
volume_init(v);
if (argc > 2) {
block = atoi(argv[2]);
if (block >= (v->size / v->block_size)) {
ULOG_ERR("invalid block %d > %" PRIu64 "\n",
block, (uint64_t) v->size / v->block_size);
goto out;
}
snprintf(file, sizeof(file), "/tmp/snapshot/block%d.tar.gz", block);
ret = snapshot_read_file(v, block, file, DATA);
goto out;
}
do {
snprintf(file, sizeof(file), "/tmp/snapshot/block%d.tar.gz", block);
block = snapshot_read_file(v, block, file, DATA);
} while (block > 0);
out:
return ret;
}
static int
snapshot_info(void)
{
struct volume *v = volume_find("rootfs_data");
struct file_header hdr = { 0 }, conf;
int block = 0;
if (!v)
return -1;
volume_init(v);
ULOG_INFO("sectors:\t%" PRIu64 ", block_size:\t%dK\n",
(uint64_t) v->size / v->block_size, v->block_size / 1024);
do {
if (volume_read(v, &hdr, block * v->block_size, sizeof(struct file_header))) {
ULOG_ERR("scanning for next free block failed\n");
return 0;
}
be32_to_hdr(&hdr);
if (hdr.magic != OWRT)
break;
if (hdr.type == DATA)
ULOG_INFO("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);
else if (hdr.type == CONF)
ULOG_INFO("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);
if (hdr.type == DATA && !valid_file_size(hdr.length))
block += pad_file_size(v, hdr.length) / v->block_size;
} while (hdr.type == DATA);
block = config_find(v, &conf, &hdr);
if (block > 0)
ULOG_INFO("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);
return 0;
}
int main(int argc, char **argv)
{
if (argc < 2)
return -1;
if (!strcmp(argv[1], "config_read"))
return config_read(argc, argv);
if (!strcmp(argv[1], "config_write"))
return config_write(argc, argv);
if (!strcmp(argv[1], "read"))
return snapshot_read(argc, argv);
if (!strcmp(argv[1], "write"))
return snapshot_write(argc, argv);
if (!strcmp(argv[1], "mark"))
return snapshot_mark(argc, argv);
if (!strcmp(argv[1], "info"))
return snapshot_info();
return -1;
}
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