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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2025, Google LLC.
* Pasha Tatashin <pasha.tatashin@soleen.com>
*
* A simple selftest to validate the end-to-end lifecycle of a LUO session
* across a single kexec reboot.
*/
#include "luo_test_utils.h"
#define TEST_SESSION_NAME "test-session"
#define TEST_MEMFD_TOKEN 0x1A
#define TEST_MEMFD_DATA "hello kexec world"
/* Constants for the state-tracking mechanism, specific to this test file. */
#define STATE_SESSION_NAME "kexec_simple_state"
#define STATE_MEMFD_TOKEN 999
/* Stage 1: Executed before the kexec reboot. */
static void run_stage_1(int luo_fd)
{
int session_fd;
ksft_print_msg("[STAGE 1] Starting pre-kexec setup...\n");
ksft_print_msg("[STAGE 1] Creating state file for next stage (2)...\n");
create_state_file(luo_fd, STATE_SESSION_NAME, STATE_MEMFD_TOKEN, 2);
ksft_print_msg("[STAGE 1] Creating session '%s' and preserving memfd...\n",
TEST_SESSION_NAME);
session_fd = luo_create_session(luo_fd, TEST_SESSION_NAME);
if (session_fd < 0)
fail_exit("luo_create_session for '%s'", TEST_SESSION_NAME);
if (create_and_preserve_memfd(session_fd, TEST_MEMFD_TOKEN,
TEST_MEMFD_DATA) < 0) {
fail_exit("create_and_preserve_memfd for token %#x",
TEST_MEMFD_TOKEN);
}
close(luo_fd);
daemonize_and_wait();
}
/* Stage 2: Executed after the kexec reboot. */
static void run_stage_2(int luo_fd, int state_session_fd)
{
int session_fd, mfd, stage;
ksft_print_msg("[STAGE 2] Starting post-kexec verification...\n");
restore_and_read_stage(state_session_fd, STATE_MEMFD_TOKEN, &stage);
if (stage != 2)
fail_exit("Expected stage 2, but state file contains %d", stage);
ksft_print_msg("[STAGE 2] Retrieving session '%s'...\n", TEST_SESSION_NAME);
session_fd = luo_retrieve_session(luo_fd, TEST_SESSION_NAME);
if (session_fd < 0)
fail_exit("luo_retrieve_session for '%s'", TEST_SESSION_NAME);
ksft_print_msg("[STAGE 2] Restoring and verifying memfd (token %#x)...\n",
TEST_MEMFD_TOKEN);
mfd = restore_and_verify_memfd(session_fd, TEST_MEMFD_TOKEN,
TEST_MEMFD_DATA);
if (mfd < 0)
fail_exit("restore_and_verify_memfd for token %#x", TEST_MEMFD_TOKEN);
close(mfd);
ksft_print_msg("[STAGE 2] Test data verified successfully.\n");
ksft_print_msg("[STAGE 2] Finalizing test session...\n");
if (luo_session_finish(session_fd) < 0)
fail_exit("luo_session_finish for test session");
close(session_fd);
ksft_print_msg("[STAGE 2] Finalizing state session...\n");
if (luo_session_finish(state_session_fd) < 0)
fail_exit("luo_session_finish for state session");
close(state_session_fd);
ksft_print_msg("\n--- SIMPLE KEXEC TEST PASSED ---\n");
}
int main(int argc, char *argv[])
{
return luo_test(argc, argv, STATE_SESSION_NAME,
run_stage_1, run_stage_2);
}
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