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46429a15a6
Add a new luo_stress_files kexec test that verifies preserving and retrieving 500 files across a kexec reboot. Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Link: https://patch.msgid.link/20260603154402.468928-14-pasha.tatashin@soleen.com Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2026, Google LLC.
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* Pasha Tatashin <pasha.tatashin@soleen.com>
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*
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* Validate that LUO can handle a large number of files per session across
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* a kexec reboot.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include "luo_test_utils.h"
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#define NUM_FILES 500
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#define STATE_SESSION_NAME "kexec_many_files_state"
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#define STATE_MEMFD_TOKEN 9999
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#define TEST_SESSION_NAME "many_files_session"
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/* Stage 1: Executed before the kexec reboot. */
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static void run_stage_1(int luo_fd)
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{
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int session_fd, i;
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ksft_print_msg("[STAGE 1] Creating state file for next stage (2)...\n");
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create_state_file(luo_fd, STATE_SESSION_NAME, STATE_MEMFD_TOKEN, 2);
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ksft_print_msg("[STAGE 1] Creating test session '%s'...\n", TEST_SESSION_NAME);
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session_fd = luo_create_session(luo_fd, TEST_SESSION_NAME);
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if (session_fd < 0)
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fail_exit("luo_create_session");
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ksft_print_msg("[STAGE 1] Preserving %d files...\n", NUM_FILES);
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for (i = 0; i < NUM_FILES; i++) {
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char data[64];
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snprintf(data, sizeof(data), "file-data-%d", i);
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if (create_and_preserve_memfd(session_fd, i, data) < 0)
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fail_exit("create_and_preserve_memfd for index %d", i);
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}
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ksft_print_msg("[STAGE 1] Successfully preserved %d files.\n", NUM_FILES);
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close(luo_fd);
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daemonize_and_wait();
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}
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/* Stage 2: Executed after the kexec reboot. */
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static void run_stage_2(int luo_fd, int state_session_fd)
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{
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int session_fd;
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int i, stage;
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ksft_print_msg("[STAGE 2] Starting post-kexec verification...\n");
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restore_and_read_stage(state_session_fd, STATE_MEMFD_TOKEN, &stage);
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if (stage != 2) {
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fail_exit("Expected stage 2, but state file contains %d",
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stage);
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}
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ksft_print_msg("[STAGE 2] Retrieving test session '%s'...\n", TEST_SESSION_NAME);
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session_fd = luo_retrieve_session(luo_fd, TEST_SESSION_NAME);
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if (session_fd < 0)
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fail_exit("luo_retrieve_session");
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ksft_print_msg("[STAGE 2] Verifying %d files...\n", NUM_FILES);
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for (i = 0; i < NUM_FILES; i++) {
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char data[64];
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int fd;
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snprintf(data, sizeof(data), "file-data-%d", i);
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fd = restore_and_verify_memfd(session_fd, i, data);
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if (fd < 0)
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fail_exit("restore_and_verify_memfd for index %d", i);
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close(fd);
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}
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ksft_print_msg("[STAGE 2] Finishing test session...\n");
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if (luo_session_finish(session_fd) < 0)
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fail_exit("luo_session_finish for test session");
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close(session_fd);
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ksft_print_msg("[STAGE 2] Finalizing state session...\n");
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if (luo_session_finish(state_session_fd) < 0)
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fail_exit("luo_session_finish for state session");
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close(state_session_fd);
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ksft_print_msg("\n--- MANY-FILES KEXEC TEST PASSED (%d files) ---\n",
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NUM_FILES);
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}
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int main(int argc, char *argv[])
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{
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return luo_test(argc, argv, STATE_SESSION_NAME,
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run_stage_1, run_stage_2);
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}
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