Quelle  membarrier_test_impl.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#define _GNU_SOURCE
#include <linux/membarrier.h>
#include <syscall.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>

#include "../kselftest.h"

static int registrations;

static int sys_membarrier(int cmd, int flags)
{
 return syscall(__NR_membarrier, cmd, flags);
}

static int test_membarrier_get_registrations(int cmd)
{
 int ret, flags = 0;
 const char *test_name =
  "sys membarrier MEMBARRIER_CMD_GET_REGISTRATIONS";

 registrations |= cmd;

 ret = sys_membarrier(MEMBARRIER_CMD_GET_REGISTRATIONS, 0);
 if (ret < 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 } else if (ret != registrations) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, ret = %d, registrations = %d\n",
   test_name, flags, ret, registrations);
 }
 ksft_test_result_pass(
  "%s test: flags = %d, ret = %d, registrations = %d\n",
  test_name, flags, ret, registrations);

 return 0;
}

static int test_membarrier_cmd_fail(void)
{
 int cmd = -1, flags = 0;
 const char *test_name = "sys membarrier invalid command";

 if (sys_membarrier(cmd, flags) != -1) {
  ksft_exit_fail_msg(
   "%s test: command = %d, flags = %d. Should fail, but passed\n",
   test_name, cmd, flags);
 }
 if (errno != EINVAL) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
   test_name, flags, EINVAL, strerror(EINVAL),
   errno, strerror(errno));
 }

 ksft_test_result_pass(
  "%s test: command = %d, flags = %d, errno = %d. Failed as expected\n",
  test_name, cmd, flags, errno);
 return 0;
}

static int test_membarrier_flags_fail(void)
{
 int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_QUERY invalid flags";

 if (sys_membarrier(cmd, flags) != -1) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should fail, but passed\n",
   test_name, flags);
 }
 if (errno != EINVAL) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
   test_name, flags, EINVAL, strerror(EINVAL),
   errno, strerror(errno));
 }

 ksft_test_result_pass(
  "%s test: flags = %d, errno = %d. Failed as expected\n",
  test_name, flags, errno);
 return 0;
}

static int test_membarrier_global_success(void)
{
 int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n", test_name, flags);
 return 0;
}

static int test_membarrier_private_expedited_fail(void)
{
 int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED not registered failure";

 if (sys_membarrier(cmd, flags) != -1) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should fail, but passed\n",
   test_name, flags);
 }
 if (errno != EPERM) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
   test_name, flags, EPERM, strerror(EPERM),
   errno, strerror(errno));
 }

 ksft_test_result_pass(
  "%s test: flags = %d, errno = %d\n",
  test_name, flags, errno);
 return 0;
}

static int test_membarrier_register_private_expedited_success(void)
{
 int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);

 test_membarrier_get_registrations(cmd);
 return 0;
}

static int test_membarrier_private_expedited_success(void)
{
 int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);
 return 0;
}

static int test_membarrier_private_expedited_sync_core_fail(void)
{
 int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE not registered failure";

 if (sys_membarrier(cmd, flags) != -1) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should fail, but passed\n",
   test_name, flags);
 }
 if (errno != EPERM) {
  ksft_exit_fail_msg(
   "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
   test_name, flags, EPERM, strerror(EPERM),
   errno, strerror(errno));
 }

 ksft_test_result_pass(
  "%s test: flags = %d, errno = %d\n",
  test_name, flags, errno);
 return 0;
}

static int test_membarrier_register_private_expedited_sync_core_success(void)
{
 int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);

 test_membarrier_get_registrations(cmd);
 return 0;
}

static int test_membarrier_private_expedited_sync_core_success(void)
{
 int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);
 return 0;
}

static int test_membarrier_register_global_expedited_success(void)
{
 int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);

 test_membarrier_get_registrations(cmd);
 return 0;
}

static int test_membarrier_global_expedited_success(void)
{
 int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
 const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL_EXPEDITED";

 if (sys_membarrier(cmd, flags) != 0) {
  ksft_exit_fail_msg(
   "%s test: flags = %d, errno = %d\n",
   test_name, flags, errno);
 }

 ksft_test_result_pass(
  "%s test: flags = %d\n",
  test_name, flags);
 return 0;
}

static int test_membarrier_fail(void)
{
 int status;

 status = test_membarrier_cmd_fail();
 if (status)
  return status;
 status = test_membarrier_flags_fail();
 if (status)
  return status;
 status = test_membarrier_private_expedited_fail();
 if (status)
  return status;
 status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0);
 if (status < 0) {
  ksft_test_result_fail("sys_membarrier() failed\n");
  return status;
 }
 if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
  status = test_membarrier_private_expedited_sync_core_fail();
  if (status)
   return status;
 }
 return 0;
}

static int test_membarrier_success(void)
{
 int status;

 status = test_membarrier_global_success();
 if (status)
  return status;
 status = test_membarrier_register_private_expedited_success();
 if (status)
  return status;
 status = test_membarrier_private_expedited_success();
 if (status)
  return status;
 status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0);
 if (status < 0) {
  ksft_test_result_fail("sys_membarrier() failed\n");
  return status;
 }
 if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
  status = test_membarrier_register_private_expedited_sync_core_success();
  if (status)
   return status;
  status = test_membarrier_private_expedited_sync_core_success();
  if (status)
   return status;
 }
 /*
 * It is valid to send a global membarrier from a non-registered
 * process.
 */
 status = test_membarrier_global_expedited_success();
 if (status)
  return status;
 status = test_membarrier_register_global_expedited_success();
 if (status)
  return status;
 status = test_membarrier_global_expedited_success();
 if (status)
  return status;
 return 0;
}

static int test_membarrier_query(void)
{
 int flags = 0, ret;

 ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
 if (ret < 0) {
  if (errno == ENOSYS) {
   /*
 * It is valid to build a kernel with
 * CONFIG_MEMBARRIER=n. However, this skips the tests.
 */
   ksft_exit_skip(
    "sys membarrier (CONFIG_MEMBARRIER) is disabled.\n");
  }
  ksft_exit_fail_msg("sys_membarrier() failed\n");
 }
 if (!(ret & MEMBARRIER_CMD_GLOBAL))
  ksft_exit_skip(
   "sys_membarrier unsupported: CMD_GLOBAL not found.\n");

 ksft_test_result_pass("sys_membarrier available\n");
 return 0;
}