tests: added test for single pre-dump support

Signed-off-by: Adrian Reber <areber@redhat.com>

test/others/libcriu/.gitignore

@@ -4,5 +4,6 @@ test_notify
 test_self
 test_sub
 test_join_ns
+test_pre_dump
 output/
 libcriu.so.*

test/others/libcriu/Makefile

@@ -6,6 +6,7 @@ TESTS += test_notify
 TESTS += test_iters
 TESTS += test_errno
 TESTS += test_join_ns
+TESTS += test_pre_dump
 
 all: $(TESTS)
 .PHONY: all

test/others/libcriu/lib.h

@@ -1,3 +1,5 @@
 void what_err_ret_mean(int ret);
 int chk_exit(int status, int want);
 int get_version(void);
+
+#define SUCC_ECODE 42

test/others/libcriu/run.sh

@@ -58,6 +58,7 @@ run_test test_notify
 if [ "$(uname -m)" = "x86_64" ]; then
 	# Skip this on aarch64 as aarch64 has no dirty page tracking
 	run_test test_iters
+	run_test test_pre_dump
 fi
 run_test test_errno
 run_test test_join_ns

test/others/libcriu/test_iters.c

@@ -46,8 +46,6 @@ static int next_iter(criu_predump_info pi)
 	return cur_iter < MAX_ITERS;
 }
 
-#define SUCC_ECODE 42
-
 int main(int argc, char **argv)
 {
 	int pid, ret, p[2];

test/others/libcriu/test_notify.c

@@ -10,8 +10,6 @@
 
 #include "lib.h"
 
-#define SUCC_ECODE 42
-
 static int actions_called = 0;
 static int notify(char *action, criu_notify_arg_t na)
 {

test/others/libcriu/test_pre_dump.c

@@ -0,0 +1,151 @@
+#include "criu.h"
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include "lib.h"
+
+static int wdir_fd, cur_imgdir = -1;
+
+static int stop = 0;
+static void sh(int sig)
+{
+	stop = 1;
+}
+
+static void open_imgdir(void)
+{
+	char p[10];
+	static int id = 0;
+
+	if (id > 0) {
+		sprintf(p, "../dir-%d", id);
+		criu_set_parent_images(p);
+	}
+	if (cur_imgdir != -1)
+		close(cur_imgdir);
+	sprintf(p, "dir-%d", ++id);
+	mkdirat(wdir_fd, p, 0700);
+	cur_imgdir = openat(wdir_fd, p, O_DIRECTORY);
+	criu_set_images_dir_fd(cur_imgdir);
+}
+
+int main(int argc, char **argv)
+{
+	int pid, ret, p[2];
+
+	wdir_fd = open(argv[2], O_DIRECTORY);
+	if (wdir_fd < 0) {
+		perror("Can't open wdir");
+		return 1;
+	}
+
+	printf("--- Start loop ---\n");
+	pipe(p);
+	pid = fork();
+	if (pid < 0) {
+		perror("Can't");
+		return -1;
+	}
+
+	if (!pid) {
+		printf("   `- loop: initializing\n");
+		if (setsid() < 0)
+			exit(1);
+		if (signal(SIGUSR1, sh) == SIG_ERR)
+			exit(1);
+
+		close(0);
+		close(1);
+		close(2);
+		close(p[0]);
+
+		ret = SUCC_ECODE;
+		write(p[1], &ret, sizeof(ret));
+		close(p[1]);
+
+		while (!stop)
+			sleep(1);
+		exit(SUCC_ECODE);
+	}
+
+	close(p[1]);
+
+	/* Wait for kid to start */
+	ret = -1;
+	read(p[0], &ret, sizeof(ret));
+	if (ret != SUCC_ECODE) {
+		printf("Error starting loop\n");
+		goto err;
+	}
+
+	/* Wait for pipe to get closed, then dump */
+	read(p[0], &ret, 1);
+	close(p[0]);
+
+	printf("--- Dump loop ---\n");
+	criu_init_opts();
+	criu_set_service_binary(argv[1]);
+	criu_set_pid(pid);
+	criu_set_log_file("dump.log");
+	criu_set_log_level(CRIU_LOG_DEBUG);
+	criu_set_track_mem(true);
+
+	open_imgdir();
+	ret = criu_pre_dump();
+	if (ret < 0) {
+		what_err_ret_mean(ret);
+		kill(pid, SIGKILL);
+		goto err;
+	}
+
+	printf("   `- Pre Dump 1 succeeded\n");
+
+	open_imgdir();
+	ret = criu_pre_dump();
+	if (ret < 0) {
+		what_err_ret_mean(ret);
+		kill(pid, SIGKILL);
+		goto err;
+	}
+
+	printf("   `- Pre Dump 2 succeeded\n");
+
+	open_imgdir();
+	ret = criu_dump();
+	if (ret < 0) {
+		what_err_ret_mean(ret);
+		kill(pid, SIGKILL);
+		goto err;
+	}
+
+	printf("   `- Final Dump succeeded\n");
+	waitpid(pid, NULL, 0);
+
+	printf("--- Restore ---\n");
+	criu_init_opts();
+	criu_set_log_level(CRIU_LOG_DEBUG);
+	criu_set_log_file("restore.log");
+	criu_set_images_dir_fd(cur_imgdir);
+
+	pid = criu_restore_child();
+	if (pid <= 0) {
+		what_err_ret_mean(pid);
+		return -1;
+	}
+
+	printf("   `- Restore returned pid %d\n", pid);
+	kill(pid, SIGUSR1);
+err:
+	if (waitpid(pid, &ret, 0) < 0) {
+		perror("   Can't wait kid");
+		return -1;
+	}
+
+	return chk_exit(ret, SUCC_ECODE);
+}

test/others/libcriu/test_sub.c

@@ -15,8 +15,6 @@ static void sh(int sig)
 	stop = 1;
 }
 
-#define SUCC_ECODE 42
-
 int main(int argc, char **argv)
 {
 	int pid, ret, fd, p[2];