mirror of
https://git.openwrt.org/project/make_ext4fs.git
synced 2024-11-12 08:06:10 -05:00
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2011 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 "ext4_utils.h"
|
|
#include "wipe.h"
|
|
|
|
#if WIPE_IS_SUPPORTED
|
|
|
|
#if defined(__linux__)
|
|
|
|
#include <linux/fs.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#ifndef BLKDISCARD
|
|
#define BLKDISCARD _IO(0x12,119)
|
|
#endif
|
|
|
|
#ifndef BLKSECDISCARD
|
|
#define BLKSECDISCARD _IO(0x12,125)
|
|
#endif
|
|
|
|
int wipe_block_device(int fd, s64 len)
|
|
{
|
|
u64 range[2];
|
|
int ret;
|
|
|
|
if (!is_block_device_fd(fd)) {
|
|
// Wiping only makes sense on a block device.
|
|
return 0;
|
|
}
|
|
|
|
range[0] = 0;
|
|
range[1] = len;
|
|
ret = ioctl(fd, BLKSECDISCARD, &range);
|
|
if (ret < 0) {
|
|
range[0] = 0;
|
|
range[1] = len;
|
|
ret = ioctl(fd, BLKDISCARD, &range);
|
|
if (ret < 0) {
|
|
warn("Discard failed\n");
|
|
return 1;
|
|
} else {
|
|
warn("Wipe via secure discard failed, used discard instead\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else /* __linux__ */
|
|
#error "Missing block device wiping implementation for this platform!"
|
|
#endif
|
|
|
|
#else /* WIPE_IS_SUPPORTED */
|
|
|
|
int wipe_block_device(int fd, s64 len)
|
|
{
|
|
/* Wiping is not supported on this platform. */
|
|
return 1;
|
|
}
|
|
|
|
#endif /* WIPE_IS_SUPPORTED */
|