Szymon Starzycki | b6c5f28 | 2013-07-24 17:08:04 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2009-2013, Google Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * * Neither the name of Google, Inc. nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this |
| 16 | * software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 22 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 25 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 26 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 27 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 28 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <unistd.h> |
| 34 | #include <stdio.h> |
| 35 | #include <sys/ioctl.h> |
| 36 | #include <linux/fs.h> |
| 37 | |
| 38 | #include "utils.h" |
| 39 | #include "debug.h" |
| 40 | |
| 41 | #ifndef BLKDISCARD |
| 42 | #define BLKDISCARD _IO(0x12,119) |
| 43 | #endif |
| 44 | |
| 45 | #ifndef BLKSECDISCARD |
| 46 | #define BLKSECDISCARD _IO(0x12,125) |
| 47 | #endif |
| 48 | |
| 49 | |
| 50 | int get_stream_size(FILE *stream) { |
| 51 | int size; |
| 52 | fseek(stream, 0, SEEK_END); |
| 53 | size = ftell(stream); |
| 54 | fseek(stream, 0, SEEK_SET); |
| 55 | return size; |
| 56 | } |
| 57 | |
| 58 | uint64_t get_block_device_size(int fd) |
| 59 | { |
| 60 | uint64_t size = 0; |
| 61 | int ret; |
| 62 | |
| 63 | ret = ioctl(fd, BLKGETSIZE64, &size); |
| 64 | |
| 65 | if (ret) |
| 66 | return 0; |
| 67 | |
| 68 | return size; |
| 69 | } |
| 70 | |
| 71 | uint64_t get_file_size(int fd) |
| 72 | { |
| 73 | struct stat buf; |
| 74 | int ret; |
| 75 | int64_t computed_size; |
| 76 | |
| 77 | ret = fstat(fd, &buf); |
| 78 | if (ret) |
| 79 | return 0; |
| 80 | |
| 81 | if (S_ISREG(buf.st_mode)) |
| 82 | computed_size = buf.st_size; |
| 83 | else if (S_ISBLK(buf.st_mode)) |
| 84 | computed_size = get_block_device_size(fd); |
| 85 | else |
| 86 | computed_size = 0; |
| 87 | |
| 88 | return computed_size; |
| 89 | } |
| 90 | |
| 91 | uint64_t get_file_size64(int fd) |
| 92 | { |
| 93 | struct stat64 buf; |
| 94 | int ret; |
| 95 | uint64_t computed_size; |
| 96 | |
| 97 | ret = fstat64(fd, &buf); |
| 98 | if (ret) |
| 99 | return 0; |
| 100 | |
| 101 | if (S_ISREG(buf.st_mode)) |
| 102 | computed_size = buf.st_size; |
| 103 | else if (S_ISBLK(buf.st_mode)) |
| 104 | computed_size = get_block_device_size(fd); |
| 105 | else |
| 106 | computed_size = 0; |
| 107 | |
| 108 | return computed_size; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | char *strip(char *str) |
| 113 | { |
| 114 | int n; |
| 115 | |
| 116 | n = strspn(str, " \t"); |
| 117 | str += n; |
| 118 | n = strcspn(str, " \t"); |
| 119 | str[n] = '\0'; |
| 120 | |
| 121 | return str; |
| 122 | } |
| 123 | |
| 124 | int wipe_block_device(int fd, int64_t len) |
| 125 | { |
| 126 | uint64_t range[2]; |
| 127 | int ret; |
| 128 | |
| 129 | range[0] = 0; |
| 130 | range[1] = len; |
| 131 | ret = ioctl(fd, BLKSECDISCARD, &range); |
| 132 | if (ret < 0) { |
| 133 | range[0] = 0; |
| 134 | range[1] = len; |
| 135 | ret = ioctl(fd, BLKDISCARD, &range); |
| 136 | if (ret < 0) { |
| 137 | D(WARN, "Discard failed\n"); |
| 138 | return 1; |
| 139 | } else { |
| 140 | D(WARN, "Wipe via secure discard failed, used discard instead\n"); |
| 141 | return 0; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | |