2 * Copyright (C) 2011 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "ext4_utils.h"
22 #if defined(__linux__)
25 #include <sys/ioctl.h>
28 #define BLKDISCARD _IO(0x12,119)
32 #define BLKSECDISCARD _IO(0x12,125)
35 int wipe_block_device(int fd
, s64 len
)
40 if (!is_block_device_fd(fd
)) {
41 // Wiping only makes sense on a block device.
47 ret
= ioctl(fd
, BLKSECDISCARD
, &range
);
51 ret
= ioctl(fd
, BLKDISCARD
, &range
);
53 warn("Discard failed\n");
56 warn("Wipe via secure discard failed, used discard instead\n");
65 #error "Missing block device wiping implementation for this platform!"
68 #else /* WIPE_IS_SUPPORTED */
70 int wipe_block_device(int fd
, s64 len
)
72 /* Wiping is not supported on this platform. */
76 #endif /* WIPE_IS_SUPPORTED */