Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 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 |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 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. |
| 15 | */ |
| 16 | |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 17 | #if defined (TARGET_INJECT_FAULTS) |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 18 | #include <map> |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 19 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 20 | |
| 21 | #include <errno.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <stdio.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | #include "ota_io.h" |
| 28 | |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 29 | #if defined (TARGET_INJECT_FAULTS) |
| 30 | static std::map<int, const char*> FilenameCache; |
| 31 | static std::string FaultFileName = |
| 32 | #if defined (TARGET_READ_FAULT) |
| 33 | TARGET_READ_FAULT; |
| 34 | #elif defined (TARGET_WRITE_FAULT) |
| 35 | TARGET_WRITE_FAULT; |
| 36 | #elif defined (TARGET_FSYNC_FAULT) |
| 37 | TARGET_FSYNC_FAULT; |
| 38 | #endif // defined (TARGET_READ_FAULT) |
| 39 | #endif // defined (TARGET_INJECT_FAULTS) |
Jed Estep | f1fc48c | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 40 | |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 41 | bool have_eio_error = false; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 42 | |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 43 | int ota_open(const char* path, int oflags) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 44 | #if defined (TARGET_INJECT_FAULTS) |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 45 | // Let the caller handle errors; we do not care if open succeeds or fails |
| 46 | int fd = open(path, oflags); |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 47 | FilenameCache[fd] = path; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 48 | return fd; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 49 | #else |
| 50 | return open(path, oflags); |
| 51 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | int ota_open(const char* path, int oflags, mode_t mode) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 55 | #if defined (TARGET_INJECT_FAULTS) |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 56 | int fd = open(path, oflags, mode); |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 57 | FilenameCache[fd] = path; |
| 58 | return fd; |
| 59 | #else |
| 60 | return open(path, oflags, mode); |
| 61 | #endif |
| 62 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 63 | |
| 64 | FILE* ota_fopen(const char* path, const char* mode) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 65 | #if defined (TARGET_INJECT_FAULTS) |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 66 | FILE* fh = fopen(path, mode); |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 67 | FilenameCache[(intptr_t)fh] = path; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 68 | return fh; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 69 | #else |
| 70 | return fopen(path, mode); |
| 71 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | int ota_close(int fd) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 75 | #if defined (TARGET_INJECT_FAULTS) |
| 76 | // descriptors can be reused, so make sure not to leave them in the cahce |
| 77 | FilenameCache.erase(fd); |
| 78 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 79 | return close(fd); |
| 80 | } |
| 81 | |
| 82 | int ota_fclose(FILE* fh) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 83 | #if defined (TARGET_INJECT_FAULTS) |
| 84 | FilenameCache.erase((intptr_t)fh); |
| 85 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 86 | return fclose(fh); |
| 87 | } |
| 88 | |
| 89 | size_t ota_fread(void* ptr, size_t size, size_t nitems, FILE* stream) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 90 | #if defined (TARGET_READ_FAULT) |
| 91 | if (FilenameCache.find((intptr_t)stream) != FilenameCache.end() |
| 92 | && FilenameCache[(intptr_t)stream] == FaultFileName) { |
| 93 | FaultFileName = ""; |
| 94 | errno = EIO; |
| 95 | have_eio_error = true; |
| 96 | return 0; |
| 97 | } else { |
| 98 | size_t status = fread(ptr, size, nitems, stream); |
| 99 | // If I/O error occurs, set the retry-update flag. |
| 100 | if (status != nitems && errno == EIO) { |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 101 | have_eio_error = true; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 102 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 103 | return status; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 104 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 105 | #else |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 106 | size_t status = fread(ptr, size, nitems, stream); |
| 107 | // If I/O error occurs, set the retry-update flag. |
| 108 | if (status != nitems && errno == EIO) { |
| 109 | have_eio_error = true; |
| 110 | } |
| 111 | return status; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 112 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | ssize_t ota_read(int fd, void* buf, size_t nbyte) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 116 | #if defined (TARGET_READ_FAULT) |
| 117 | if (FilenameCache.find(fd) != FilenameCache.end() |
| 118 | && FilenameCache[fd] == FaultFileName) { |
| 119 | FaultFileName = ""; |
| 120 | errno = EIO; |
| 121 | have_eio_error = true; |
| 122 | return -1; |
| 123 | } else { |
| 124 | ssize_t status = read(fd, buf, nbyte); |
| 125 | if (status == -1 && errno == EIO) { |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 126 | have_eio_error = true; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 127 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 128 | return status; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 129 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 130 | #else |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 131 | ssize_t status = read(fd, buf, nbyte); |
| 132 | if (status == -1 && errno == EIO) { |
| 133 | have_eio_error = true; |
| 134 | } |
| 135 | return status; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 136 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | size_t ota_fwrite(const void* ptr, size_t size, size_t count, FILE* stream) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 140 | #if defined (TARGET_WRITE_FAULT) |
| 141 | if (FilenameCache.find((intptr_t)stream) != FilenameCache.end() |
| 142 | && FilenameCache[(intptr_t)stream] == FaultFileName) { |
| 143 | FaultFileName = ""; |
| 144 | errno = EIO; |
| 145 | have_eio_error = true; |
| 146 | return 0; |
| 147 | } else { |
| 148 | size_t status = fwrite(ptr, size, count, stream); |
| 149 | if (status != count && errno == EIO) { |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 150 | have_eio_error = true; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 151 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 152 | return status; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 153 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 154 | #else |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 155 | size_t status = fwrite(ptr, size, count, stream); |
| 156 | if (status != count && errno == EIO) { |
| 157 | have_eio_error = true; |
| 158 | } |
| 159 | return status; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 160 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | ssize_t ota_write(int fd, const void* buf, size_t nbyte) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 164 | #if defined (TARGET_WRITE_FAULT) |
| 165 | if (FilenameCache.find(fd) != FilenameCache.end() |
| 166 | && FilenameCache[fd] == FaultFileName) { |
| 167 | FaultFileName = ""; |
| 168 | errno = EIO; |
| 169 | have_eio_error = true; |
| 170 | return -1; |
| 171 | } else { |
| 172 | ssize_t status = write(fd, buf, nbyte); |
| 173 | if (status == -1 && errno == EIO) { |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 174 | have_eio_error = true; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 175 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 176 | return status; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 177 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 178 | #else |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 179 | ssize_t status = write(fd, buf, nbyte); |
| 180 | if (status == -1 && errno == EIO) { |
| 181 | have_eio_error = true; |
| 182 | } |
| 183 | return status; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 184 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | int ota_fsync(int fd) { |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 188 | #if defined (TARGET_FSYNC_FAULT) |
| 189 | if (FilenameCache.find(fd) != FilenameCache.end() |
| 190 | && FilenameCache[fd] == FaultFileName) { |
| 191 | FaultFileName = ""; |
| 192 | errno = EIO; |
| 193 | have_eio_error = true; |
| 194 | return -1; |
| 195 | } else { |
| 196 | int status = fsync(fd); |
| 197 | if (status == -1 && errno == EIO) { |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 198 | have_eio_error = true; |
Jed Estep | 39c1b5e | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 199 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 200 | return status; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 201 | } |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 202 | #else |
Tianjie Xu | 3c62b67 | 2016-02-05 18:25:58 -0800 | [diff] [blame] | 203 | int status = fsync(fd); |
| 204 | if (status == -1 && errno == EIO) { |
| 205 | have_eio_error = true; |
| 206 | } |
| 207 | return status; |
Tao Bao | ce58688 | 2016-03-17 22:29:23 +0000 | [diff] [blame] | 208 | #endif |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 209 | } |