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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include "Xwarp.h"
const char *Xwarp::XWARP_BACKINGFILE = "/mnt/secure/asec/xwarp.img";
const char *Xwarp::XWARP_CFG = "/sys/fs/yaffs/mtd3/xwarp-backing-store";
const char *Xwarp::XWARP_READY = "/sys/fs/yaffs/mtd3/xwarp-ready";
const char *Xwarp::XWARP_MIRROR_STATUS = "/sys/fs/yaffs/mtd3/xwarp-mirror";
int Xwarp::enable() {
return doEnableDisable(true);
}
int Xwarp::disable() {
return doEnableDisable(false);
}
int Xwarp::status(bool *ready, unsigned *mirrorPos, unsigned *maxSize) {
FILE *fp;
*ready = false;
*mirrorPos = 0;
*maxSize = 0;
if (!(fp = fopen(XWARP_READY, "r"))) {
return -1;
}
fscanf(fp, "%d", (int *) ready);
fclose(fp);
if (!(fp = fopen(XWARP_MIRROR_STATUS, "r"))) {
return -1;
}
fscanf(fp, "%u %u", mirrorPos, maxSize);
fclose(fp);
return 0;
}
int Xwarp::doEnableDisable(bool enable) {
const char *tmp;
int fd = open(XWARP_CFG, O_WRONLY);
if (fd < 0)
return -1;
tmp = (enable ? XWARP_BACKINGFILE : "");
if (write(fd, tmp, strlen(tmp)+1) < 0) {
SLOGE("Failed to write xwarp cfg (%s)", strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
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