test: check a pipe with a custom size

CRIU doesn't handle correctly pipes with sizes which are bigger than a
default one.
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm/static/Makefile

@@ -192,6 +192,7 @@ TST_NOFILE	:=				\
 		s390x_mmap_high			\
 		uffd-events			\
 		thread_different_uid_gid	\
+		pipe03				\
 #		jobctl00			\
 
 include ../Makefile.inc

test/zdtm/static/pipe03.c

+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check that pipes with a non-default size can be c/r-ed";
+const char *test_author	= "Andrei Vagin <avagin@gmail.com>";
+
+#define DATA_SIZE (1 << 20)
+#define BUF_SIZE (4096)
+
+int main(int argc, char **argv)
+{
+	int p[2], i;
+	uint8_t buf[BUF_SIZE];
+	uint32_t crc;
+
+	test_init(argc, argv);
+
+	if (pipe2(p, O_NONBLOCK)) {
+		pr_perror("pipe");
+		return 1;
+	}
+
+	if (fcntl(p[1], F_SETPIPE_SZ, DATA_SIZE) == -1) {
+		pr_perror("Unable to change a pipe size");
+		return 1;
+	}
+
+	crc = ~0;
+	datagen(buf, BUF_SIZE, &crc);
+
+	for (i = 0; i < DATA_SIZE / BUF_SIZE; i++) {
+		if (write(p[1], buf, BUF_SIZE) != BUF_SIZE) {
+			pr_perror("write");
+			return 1;
+		}
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	for (i = 0; i < DATA_SIZE / BUF_SIZE; i++) {
+		if (read(p[0], buf, BUF_SIZE) != BUF_SIZE) {
+			pr_perror("read");
+			return 1;
+		}
+	}
+
+	pass();
+	return 0;
+}