mirror of
https://github.com/torvalds/linux.git
synced 2026-07-27 17:47:41 +02:00
3432292fb9
Add a new test that creates 2000 LUO sessions before a kexec reboot and verifies their presence after the reboot. This ensures that the linked-block serialization mechanism works correctly for a large number of sessions. Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Link: https://patch.msgid.link/20260603154402.468928-13-pasha.tatashin@soleen.com Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
/*
|
|
* Copyright (c) 2026, Google LLC.
|
|
* Pasha Tatashin <pasha.tatashin@soleen.com>
|
|
*
|
|
* Validate that LUO can handle a large number of sessions across a kexec
|
|
* reboot.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include "luo_test_utils.h"
|
|
|
|
#define NUM_SESSIONS 2000
|
|
#define STATE_SESSION_NAME "kexec_many_state"
|
|
#define STATE_MEMFD_TOKEN 999
|
|
|
|
/* Stage 1: Executed before the kexec reboot. */
|
|
static void run_stage_1(int luo_fd)
|
|
{
|
|
int ret, i;
|
|
|
|
ksft_print_msg("[STAGE 1] Increasing ulimit for open files...\n");
|
|
ret = luo_ensure_nofile_limit(NUM_SESSIONS);
|
|
if (ret == -EPERM)
|
|
ksft_exit_skip("Insufficient privileges to set RLIMIT_NOFILE\n");
|
|
if (ret < 0)
|
|
ksft_exit_fail_msg("luo_ensure_nofile_limit failed: %s\n", strerror(-ret));
|
|
|
|
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 %d sessions...\n", NUM_SESSIONS);
|
|
|
|
for (i = 0; i < NUM_SESSIONS; i++) {
|
|
char name[LIVEUPDATE_SESSION_NAME_LENGTH];
|
|
int s_fd;
|
|
|
|
snprintf(name, sizeof(name), "many-test-%d", i);
|
|
s_fd = luo_create_session(luo_fd, name);
|
|
if (s_fd < 0) {
|
|
fail_exit("luo_create_session for '%s' at index %d",
|
|
name, i);
|
|
}
|
|
}
|
|
|
|
ksft_print_msg("[STAGE 1] Successfully created %d sessions.\n",
|
|
NUM_SESSIONS);
|
|
|
|
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 i, 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 and finishing %d sessions...\n",
|
|
NUM_SESSIONS);
|
|
|
|
for (i = 0; i < NUM_SESSIONS; i++) {
|
|
char name[LIVEUPDATE_SESSION_NAME_LENGTH];
|
|
int s_fd;
|
|
|
|
snprintf(name, sizeof(name), "many-test-%d", i);
|
|
s_fd = luo_retrieve_session(luo_fd, name);
|
|
if (s_fd < 0) {
|
|
fail_exit("luo_retrieve_session for '%s' at index %d",
|
|
name, i);
|
|
}
|
|
|
|
if (luo_session_finish(s_fd) < 0) {
|
|
fail_exit("luo_session_finish for '%s' at index %d",
|
|
name, i);
|
|
}
|
|
close(s_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--- MANY-SESSIONS KEXEC TEST PASSED (%d sessions) ---\n",
|
|
NUM_SESSIONS);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
return luo_test(argc, argv, STATE_SESSION_NAME,
|
|
run_stage_1, run_stage_2);
|
|
}
|