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/*
* Copyright (C) 2015 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 <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <errno.h>
#include <cutils/partition_utils.h>
#include <sys/mount.h>
#include "ext4_utils.h"
#include "ext4.h"
#include "make_ext4fs.h"
#include "fs_mgr_priv.h"
extern struct fs_info info; /* magic global from ext4_utils */
extern void reset_ext4fs_info();
static int format_ext4(char *fs_blkdev, char *fs_mnt_point, long long fs_length)
{
uint64_t dev_sz;
int fd, rc = 0;
if ((fd = open(fs_blkdev, O_WRONLY, 0644)) < 0) {
ERROR("Cannot open block device. %s\n", strerror(errno));
return -1;
}
if ((ioctl(fd, BLKGETSIZE64, &dev_sz)) == -1) {
ERROR("Cannot get block device size. %s\n", strerror(errno));
close(fd);
return -1;
}
/* Format the partition using the calculated length */
reset_ext4fs_info();
info.len = (off64_t)dev_sz;
if (fs_length > 0) {
info.len = fs_length;
} else if (fs_length < 0) {
info.len += fs_length;
}
/* Use make_ext4fs_internal to avoid wiping an already-wiped partition. */
rc = make_ext4fs_internal(fd, NULL, NULL, fs_mnt_point, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL);
if (rc) {
ERROR("make_ext4fs returned %d.\n", rc);
}
close(fd);
return rc;
}
static int format_f2fs(char *fs_blkdev, long long fs_length)
{
char * args[5];
int pid;
int rc = 0;
char buff[65];
args[0] = (char *)"/system/bin/mkfs.f2fs";
if (fs_length >= 0) {
snprintf(buff, sizeof(buff), "%lld", fs_length / 512);
args[1] = fs_blkdev;
args[2] = buff;
args[3] = (char *)0;
} else if (fs_length < 0) {
snprintf(buff, sizeof(buff), "%lld", -fs_length);
args[1] = "-r";
args[2] = buff;
args[3] = fs_blkdev;
args[4] = (char *)0;
}
pid = fork();
if (pid < 0) {
return pid;
}
if (!pid) {
/* This doesn't return */
execv("/system/bin/mkfs.f2fs", args);
exit(1);
}
for(;;) {
pid_t p = waitpid(pid, &rc, 0);
if (p != pid) {
ERROR("Error waiting for child process - %d\n", p);
rc = -1;
break;
}
if (WIFEXITED(rc)) {
rc = WEXITSTATUS(rc);
INFO("%s done, status %d\n", args[0], rc);
if (rc) {
rc = -1;
}
break;
}
ERROR("Still waiting for %s...\n", args[0]);
}
return rc;
}
int fs_mgr_do_format(struct fstab_rec *fstab)
{
int rc = -EINVAL;
ERROR("%s: Format %s as '%s'.\n", __func__, fstab->blk_device, fstab->fs_type);
if (!strncmp(fstab->fs_type, "f2fs", 4)) {
rc = format_f2fs(fstab->blk_device, fstab->length);
} else if (!strncmp(fstab->fs_type, "ext4", 4)) {
rc = format_ext4(fstab->blk_device, fstab->mount_point, fstab->length);
} else {
ERROR("File system type '%s' is not supported\n", fstab->fs_type);
}
return rc;
}
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