tools/testing/selftests/coredump/coredump_test.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __COREDUMP_TEST_H
#define __COREDUMP_TEST_H

#include <stdbool.h>
#include <sys/types.h>
#include <linux/coredump.h>

#include "../kselftest_harness.h"
#include "../pidfd/pidfd.h"

#ifndef PAGE_SIZE
#define PAGE_SIZE 4096
#endif

#define NUM_THREAD_SPAWN 128

/* Coredump fixture */
FIXTURE(coredump)
{
	char original_core_pattern[256];
	pid_t pid_coredump_server;
	int fd_tmpfs_detached;
};

/* Shared helper function declarations */
void *do_nothing(void *arg);
void crashing_child(void);
int create_detached_tmpfs(void);
int create_and_listen_unix_socket(const char *path);
bool set_core_pattern(const char *pattern);
int get_peer_pidfd(int fd);
bool get_pidfd_info(int fd_peer_pidfd, struct pidfd_info *info);

/* Inline helper that uses harness types */
static inline void wait_and_check_coredump_server(pid_t pid_coredump_server,
						   struct __test_metadata *const _metadata,
						   FIXTURE_DATA(coredump) *self)
{
	int status;
	waitpid(pid_coredump_server, &status, 0);
	self->pid_coredump_server = -ESRCH;
	ASSERT_TRUE(WIFEXITED(status));
	ASSERT_EQ(WEXITSTATUS(status), 0);
}

/* Protocol helper function declarations */
ssize_t recv_marker(int fd);
bool read_marker(int fd, enum coredump_mark mark);
bool read_coredump_req(int fd, struct coredump_req *req);
bool send_coredump_ack(int fd, const struct coredump_req *req,
		       __u64 mask, size_t size_ack);
bool check_coredump_req(const struct coredump_req *req, size_t min_size,
			__u64 required_mask);
int open_coredump_tmpfile(int fd_tmpfs_detached);
void process_coredump_worker(int fd_coredump, int fd_peer_pidfd, int fd_core_file);

#endif /* __COREDUMP_TEST_H */