| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | sysfs.c |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | This file contains tests for the sysfs file system. |
| 12 | |
| 13 | --*/ |
| 14 | |
| 15 | #include "lxtcommon.h" |
| 16 | #include "unittests.h" |
| 17 | #include <stdlib.h> |
| 18 | #include <stdio.h> |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <dirent.h> |
| 22 | #include <fcntl.h> |
| 23 | |
| 24 | #define LXT_NAME "SysFs" |
| 25 | |
| 26 | #define SYSFS_MNT "/sys" |
| 27 | |
| 28 | int SysFsClassNet(PLXT_ARGS Args); |
| 29 | |
| 30 | int SysFsDevicesSystemCpu(PLXT_ARGS Args); |
| 31 | |
| 32 | int SysFsDevicesVirtualNet(PLXT_ARGS Args); |
| 33 | |
| 34 | int SysFsKernelDebug(PLXT_ARGS Args); |
| 35 | |
| 36 | int SysFsRoot(PLXT_ARGS Args); |
| 37 | |
| 38 | // |
| 39 | // Global constants |
| 40 | // |
| 41 | |
| 42 | static const LXT_VARIATION g_LxtVariations[] = { |
| 43 | {"SysFs - /sys root", SysFsRoot}, |
| 44 | {"SysFs - /sys/class/net", SysFsClassNet}, |
| 45 | {"SysFs - /sys/devices/virtual/net", SysFsDevicesVirtualNet}, |
| 46 | {"SysFs - /sys/devices/system/cpu", SysFsDevicesSystemCpu}, |
| 47 | {"SysFs - /sys/kernel/debug", SysFsKernelDebug}, |
| 48 | }; |
| 49 | |
| 50 | static const LXT_CHILD_INFO g_SysFsRootChildren[] = { |
| 51 | {"block", DT_DIR}, |
| 52 | {"bus", DT_DIR}, |
| 53 | {"class", DT_DIR}, |
| 54 | {"dev", DT_DIR}, |
| 55 | {"devices", DT_DIR}, |
| 56 | {"firmware", DT_DIR}, |
| 57 | {"fs", DT_DIR}, |
| 58 | {"kernel", DT_DIR}, |
| 59 | {"module", DT_DIR}, |
| 60 | {"power", DT_DIR}}; |
| 61 | |
| 62 | static const LXT_CHILD_INFO g_SysFsClassNetChildren[] = {{"lo", DT_LNK}}; |
| 63 | |
| 64 | static const LXT_CHILD_INFO g_SysFsDevicesVirtualNetChildren[] = {{"lo", DT_DIR}}; |
| 65 | |
| 66 | static const LXT_CHILD_INFO g_SysFsDevicesVirtualNetDeviceChildren[] = { |
| 67 | {"address", DT_REG}, {"ifindex", DT_REG}, {"flags", DT_REG}, {"mtu", DT_REG}}; |
| 68 | |
| 69 | static const LXT_CHILD_INFO g_SysFsDevicesSystemCpuChildren[] = {{"cpu0", DT_DIR}, {"present", DT_REG}, {"possible", DT_REG}}; |
| 70 | |
| 71 | static const LXT_CHILD_INFO g_SysFsDevicesSystemCpuDeviceChildren[] = {{"topology", DT_DIR}}; |
| 72 | |
| 73 | static const LXT_CHILD_INFO g_SysFsDevicesSystemCpuDeviceCpuFreqChildren[] = {{"cpuinfo_max_freq", DT_REG}, {"scaling_max_freq", DT_REG}}; |
| 74 | |
| 75 | static const LXT_CHILD_INFO g_SysFsDevicesSystemCpuDeviceTopologyChildren[] = { |
| 76 | {"core_id", DT_REG}, |
| 77 | {"core_siblings", DT_REG}, |
| 78 | {"core_siblings_list", DT_REG}, |
| 79 | {"physical_package_id", DT_REG}, |
| 80 | {"thread_siblings", DT_REG}, |
| 81 | {"thread_siblings_list", DT_REG}}; |
| 82 | |
| 83 | static const LXT_CHILD_INFO g_SysFsKernelDebugChildren[] = {{"tracing", DT_DIR}, {"wakeup_sources", DT_REG}}; |
| 84 | |
| 85 | static const LXT_CHILD_INFO g_SysFsKernelDebugTracingChildren[] = {{"trace_marker", DT_REG}}; |
| 86 | |
| 87 | static const LXT_CHILD_INFO g_SysFsKernelIp4Children[] = { |
| 88 | {"tcp_rmem_min", DT_REG}, {"tcp_rmem_def", DT_REG}, {"tcp_rmem_max", DT_REG}, {"tcp_wmem_min", DT_REG}, {"tcp_wmem_def", DT_REG}, {"tcp_wmem_max", DT_REG}}; |
| 89 | |
| 90 | static const LXT_CHILD_INFO g_SysFsModuleLowmemorykillerChildren[] = {{"parameters", DT_DIR}}; |
| 91 | |
| 92 | static const LXT_CHILD_INFO g_SysFsModuleLowmemorykillerParametersChildren[] = {{"adj", DT_REG}, {"minfree", DT_REG}}; |
| 93 | |
| 94 | static const LXT_CHILD_INFO g_SysFsPowerChildren[] = {{"autosleep", DT_REG}}; |
| 95 | |
| 96 | int SysfsTestEntry(int Argc, char* Argv[]) |
| 97 | |
| 98 | /*++ |
| 99 | |
| 100 | Routine Description: |
| 101 | |
| 102 | This routine is the main entry point for the procfs tests. |
| 103 | |
| 104 | Arguments: |
| 105 | |
| 106 | Argc - Supplies the number of command line arguments. |
| 107 | |
| 108 | Argv - Supplies the command line arguments. |
| 109 | |
| 110 | Return Value: |
| 111 | |
| 112 | Returns 0 on success, -1 on failure. |
| 113 | |
| 114 | --*/ |
| 115 | |
| 116 | { |
| 117 | |
| 118 | LXT_ARGS Args; |
| 119 | int Result; |
| 120 | |
| 121 | LxtCheckResult(LxtInitialize(Argc, Argv, &Args, LXT_NAME)); |
| 122 | LxtCheckResult(LxtRunVariations(&Args, g_LxtVariations, LXT_COUNT_OF(g_LxtVariations))); |
| 123 | |
| 124 | ErrorExit: |
| 125 | LxtUninitialize(); |
| 126 | return !LXT_SUCCESS(Result); |
| 127 | } |
| 128 | |
| 129 | int SysFsClassNet(PLXT_ARGS Args) |
| 130 | |
| 131 | /*++ |
| 132 | |
| 133 | Description: |
| 134 | |
| 135 | This routine tests the sysfs network class directory (/sys/class/net). |
| 136 | |
| 137 | Arguments: |
| 138 | |
| 139 | Args - Supplies the command line arguments. |
| 140 | |
| 141 | Return Value: |
| 142 | |
| 143 | Returns 0 on success, -1 on failure. |
| 144 | |
| 145 | --*/ |
| 146 | |
| 147 | { |
| 148 | |
| 149 | int Result; |
| 150 | |
| 151 | // |
| 152 | // This test may fail on real Linux because the contents are not |
| 153 | // guaranteed to be the same on every system. |
| 154 | // |
| 155 | |
| 156 | LxtCheckResult(LxtCheckDirectoryContents(SYSFS_MNT "/class/net", g_SysFsClassNetChildren, LXT_COUNT_OF(g_SysFsClassNetChildren))); |
| 157 | |
| 158 | LxtCheckResult(LxtCheckLinkTarget(SYSFS_MNT "/class/net/lo", "../../devices/virtual/net/lo")); |
| 159 | |
| 160 | ErrorExit: |
| 161 | return Result; |
| 162 | } |
| 163 | |
| 164 | int SysFsDevicesSystemCpu(PLXT_ARGS Args) |
| 165 | |
| 166 | /*++ |
| 167 | |
| 168 | Description: |
| 169 | |
| 170 | This routine tests the cpu device directory (/sys/devices/system/cpu). |
| 171 | |
| 172 | Arguments: |
| 173 | |
| 174 | Args - Supplies the command line arguments. |
| 175 | |
| 176 | Return Value: |
| 177 | |
| 178 | Returns 0 on success, -1 on failure. |
| 179 | |
| 180 | --*/ |
| 181 | |
| 182 | { |
| 183 | |
| 184 | char Buffer[100]; |
| 185 | char ChildPath[256]; |
| 186 | int CpuInfoProcessorCount; |
| 187 | ssize_t BytesRead; |
| 188 | int Fd; |
| 189 | char* Line; |
| 190 | int ProcessorIndex; |
| 191 | int ProcessorCount; |
| 192 | int Result; |
| 193 | size_t Size; |
| 194 | FILE* Stream; |
| 195 | |
| 196 | // |
| 197 | // First check always present contents. |
| 198 | // |
| 199 | |
| 200 | Fd = 0; |
| 201 | Stream = NULL; |
| 202 | Line = NULL; |
| 203 | LxtCheckResult(LxtCheckDirectoryContents( |
| 204 | SYSFS_MNT "/devices/system/cpu", g_SysFsDevicesSystemCpuChildren, LXT_COUNT_OF(g_SysFsDevicesSystemCpuChildren))); |
| 205 | |
| 206 | // |
| 207 | // Determine the number of CPUs. |
| 208 | // |
| 209 | |
| 210 | LxtCheckErrno(Fd = open(SYSFS_MNT "/devices/system/cpu/present", O_RDONLY)); |
| 211 | LxtCheckErrno(BytesRead = read(Fd, Buffer, sizeof(Buffer))); |
| 212 | LxtCheckEqual(Buffer[0], '0', "%c"); |
| 213 | ProcessorCount = 1; |
| 214 | if (Buffer[1] != '\n') |
| 215 | { |
| 216 | LxtCheckEqual(Buffer[1], '-', "%c"); |
| 217 | ProcessorCount = strtol(&Buffer[2], NULL, 10); |
| 218 | LxtCheckGreater(ProcessorCount, 0, "%d"); |
| 219 | ProcessorCount += 1; |
| 220 | } |
| 221 | |
| 222 | LxtCheckErrnoZeroSuccess(close(Fd)); |
| 223 | |
| 224 | // |
| 225 | // Check CPU directory for each CPU. |
| 226 | // |
| 227 | |
| 228 | for (ProcessorIndex = 0; ProcessorIndex < ProcessorCount; ProcessorIndex += 1) |
| 229 | { |
| 230 | |
| 231 | snprintf(ChildPath, sizeof(ChildPath), SYSFS_MNT "/devices/system/cpu/cpu%d", ProcessorIndex); |
| 232 | |
| 233 | LxtCheckResult(LxtCheckDirectoryContents( |
| 234 | ChildPath, g_SysFsDevicesSystemCpuDeviceChildren, LXT_COUNT_OF(g_SysFsDevicesSystemCpuDeviceChildren))); |
| 235 | |
| 236 | snprintf(ChildPath, sizeof(ChildPath), SYSFS_MNT "/devices/system/cpu/cpu%d/topology", ProcessorIndex); |
| 237 | |
| 238 | LxtCheckResult(LxtCheckDirectoryContents( |
| 239 | ChildPath, g_SysFsDevicesSystemCpuDeviceTopologyChildren, LXT_COUNT_OF(g_SysFsDevicesSystemCpuDeviceTopologyChildren))); |
| 240 | } |
| 241 | |
| 242 | // |
| 243 | // No more directories should exist. |
| 244 | // |
| 245 | |
| 246 | snprintf(ChildPath, sizeof(ChildPath), SYSFS_MNT "/devices/system/cpu/cpu%d", ProcessorCount); |
| 247 | |
| 248 | LxtCheckErrnoFailure(open(ChildPath, O_RDONLY | O_DIRECTORY), ENOENT); |
| 249 | |
| 250 | // |
| 251 | // Check if the number of CPUs matches /proc/cpuinfo. |
| 252 | // |
| 253 | |
| 254 | Stream = fopen("/proc/cpuinfo", "r"); |
| 255 | if (Stream == NULL) |
| 256 | { |
| 257 | LxtLogError("fopen failed, errno: %d", errno); |
| 258 | Result = LXT_RESULT_FAILURE; |
| 259 | goto ErrorExit; |
| 260 | } |
| 261 | |
| 262 | Size = 0; |
| 263 | CpuInfoProcessorCount = 0; |
| 264 | while (getline(&Line, &Size, Stream) != -1) |
| 265 | { |
| 266 | if (strstr(Line, "processor") == Line) |
| 267 | { |
| 268 | CpuInfoProcessorCount += 1; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | LxtCheckEqual(ProcessorCount, CpuInfoProcessorCount, "%d"); |
| 273 | |
| 274 | ErrorExit: |
| 275 | if (Line != NULL) |
| 276 | { |
| 277 | free(Line); |
| 278 | } |
| 279 | |
| 280 | if (Stream != NULL) |
| 281 | { |
| 282 | fclose(Stream); |
| 283 | } |
| 284 | |
| 285 | if (Fd > 0) |
| 286 | { |
| 287 | close(Fd); |
| 288 | } |
| 289 | |
| 290 | return Result; |
| 291 | } |
| 292 | |
| 293 | int SysFsDevicesVirtualNet(PLXT_ARGS Args) |
| 294 | |
| 295 | /*++ |
| 296 | |
| 297 | Description: |
| 298 | |
| 299 | This routine tests the sysfs network device directory |
| 300 | (/sys/devices/virtual/net). |
| 301 | |
| 302 | Arguments: |
| 303 | |
| 304 | Args - Supplies the command line arguments. |
| 305 | |
| 306 | Return Value: |
| 307 | |
| 308 | Returns 0 on success, -1 on failure. |
| 309 | |
| 310 | --*/ |
| 311 | |
| 312 | { |
| 313 | |
| 314 | int Result; |
| 315 | |
| 316 | // |
| 317 | // This test may fail on real Linux because the contents are not |
| 318 | // guaranteed to be the same on every system. |
| 319 | // |
| 320 | |
| 321 | LxtCheckResult(LxtCheckDirectoryContents( |
| 322 | SYSFS_MNT "/devices/virtual/net", g_SysFsDevicesVirtualNetChildren, LXT_COUNT_OF(g_SysFsDevicesVirtualNetChildren))); |
| 323 | |
| 324 | LxtCheckResult(LxtCheckDirectoryContents( |
| 325 | SYSFS_MNT "/devices/virtual/net/lo", g_SysFsDevicesVirtualNetDeviceChildren, LXT_COUNT_OF(g_SysFsDevicesVirtualNetDeviceChildren))); |
| 326 | |
| 327 | ErrorExit: |
| 328 | return Result; |
| 329 | } |
| 330 | |
| 331 | int SysFsKernelDebug(PLXT_ARGS Args) |
| 332 | |
| 333 | /*++ |
| 334 | |
| 335 | Description: |
| 336 | |
| 337 | This routine tests the debug directory (/sys/kernel/debug). |
| 338 | |
| 339 | Arguments: |
| 340 | |
| 341 | Args - Supplies the command line arguments. |
| 342 | |
| 343 | Return Value: |
| 344 | |
| 345 | Returns 0 on success, -1 on failure. |
| 346 | |
| 347 | --*/ |
| 348 | |
| 349 | { |
| 350 | |
| 351 | int Result; |
| 352 | |
| 353 | LxtCheckResult(LxtCheckDirectoryContents(SYSFS_MNT "/kernel/debug", g_SysFsKernelDebugChildren, LXT_COUNT_OF(g_SysFsKernelDebugChildren))); |
| 354 | |
| 355 | LxtCheckResult(LxtCheckDirectoryContents( |
| 356 | SYSFS_MNT "/kernel/debug/tracing", g_SysFsKernelDebugTracingChildren, LXT_COUNT_OF(g_SysFsKernelDebugTracingChildren))); |
| 357 | |
| 358 | LxtCheckResult(LxtCheckWrite(SYSFS_MNT "/kernel/debug/tracing/trace_marker", "bogus")); |
| 359 | |
| 360 | ErrorExit: |
| 361 | return Result; |
| 362 | } |
| 363 | |
| 364 | int SysFsRoot(PLXT_ARGS Args) |
| 365 | |
| 366 | /*++ |
| 367 | |
| 368 | Description: |
| 369 | |
| 370 | This routine tests the sysfs root directory (/sys). |
| 371 | |
| 372 | Arguments: |
| 373 | |
| 374 | Args - Supplies the command line arguments. |
| 375 | |
| 376 | Return Value: |
| 377 | |
| 378 | Returns 0 on success, -1 on failure. |
| 379 | |
| 380 | --*/ |
| 381 | |
| 382 | { |
| 383 | |
| 384 | int Result; |
| 385 | |
| 386 | LxtCheckResult(LxtCheckStat(SYSFS_MNT, 1, DT_DIR)); |
| 387 | LxtCheckResult(LxtCheckDirectoryContents(SYSFS_MNT, g_SysFsRootChildren, LXT_COUNT_OF(g_SysFsRootChildren))); |
| 388 | |
| 389 | ErrorExit: |
| 390 | return Result; |
| 391 | } |