zdtm: Test that socket filter migrates well

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -46,6 +46,7 @@ static/cmdlinenv00
 static/socket_listen
 static/packet_sock
 static/socket_udp
+static/sock_filter
 static/socket6_udp
 static/socket_udplite
 static/selfexe00

test/zdtm/live/static/Makefile

@@ -27,6 +27,7 @@ TST_NOFILE	=				\
 		socket_udplite			\
 		socket_aio			\
 		packet_sock			\
+		sock_filter			\
 		msgque				\
 		inotify_system			\
 		inotify_system_nodel		\

test/zdtm/live/static/sock_filter.c

@@ -0,0 +1,115 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/filter.h>
+#include <linux/in.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check socket filter";
+const char *test_author	= "Pavel Emelyanov <xemul@parallels.com>";
+
+#ifndef SO_GET_FILTER
+#define SO_GET_FILTER           SO_ATTACH_FILTER
+#endif
+
+#define SFLEN	14
+
+int main(int argc, char **argv)
+{
+	int sk;
+	struct sock_fprog p;
+	struct sock_filter f[SFLEN] = {
+		{ 0x28, 0, 0, 0x0000000c },
+		{ 0x15, 0, 4, 0x00000800 },
+		{ 0x20, 0, 0, 0x0000001a },
+		{ 0x15, 8, 0, 0x7f000001 },
+		{ 0x20, 0, 0, 0x0000001e },
+		{ 0x15, 6, 7, 0x7f000001 },
+		{ 0x15, 1, 0, 0x00000806 },
+		{ 0x15, 0, 5, 0x00008035 },
+		{ 0x20, 0, 0, 0x0000001c },
+		{ 0x15, 2, 0, 0x7f000001 },
+		{ 0x20, 0, 0, 0x00000026 },
+		{ 0x15, 0, 1, 0x7f000001 },
+		{ 0x6,  0, 0, 0x0000ffff },
+		{ 0x6,  0, 0, 0x00000000 },
+	};
+	struct sock_filter f2[SFLEN], f3[SFLEN];
+	socklen_t len;
+
+	test_init(argc, argv);
+
+	sk = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if (sk < 0) {
+		err("No socket");
+		return 1;
+	}
+
+	p.len = SFLEN;
+	p.filter = f;
+
+	if (setsockopt(sk, SOL_SOCKET, SO_ATTACH_FILTER, &p, sizeof(p))) {
+		err("No filter");
+		return 1;
+	}
+
+	len = 0;
+	if (getsockopt(sk, SOL_SOCKET, SO_GET_FILTER, NULL, &len)) {
+		err("No len");
+		return 1;
+	}
+
+	if (len != SFLEN) {
+		err("Len mismatch");
+		return 1;
+	}
+
+	memset(f2, 0, sizeof(f2));
+	if (getsockopt(sk, SOL_SOCKET, SO_GET_FILTER, f2, &len)) {
+		perror("No filter");
+		return 1;
+	}
+
+	if (len != SFLEN) {
+		err("Len mismatch2");
+		return 1;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	len = 0;
+	if (getsockopt(sk, SOL_SOCKET, SO_GET_FILTER, NULL, &len)) {
+		fail("No len");
+		return 1;
+	}
+
+	if (len != SFLEN) {
+		fail("Len mismatch");
+		return 1;
+	}
+
+	memset(f3, 0, sizeof(f3));
+	if (getsockopt(sk, SOL_SOCKET, SO_GET_FILTER, f3, &len)) {
+		fail("No filter");
+		return 1;
+	}
+
+	if (len != SFLEN) {
+		fail("Len mismatch2");
+		return 1;
+	}
+
+	if (memcmp(f2, f3, sizeof(f2))) {
+		fail("Filters mismatch");
+		return 1;
+	}
+
+	pass();
+
+	return 0;
+}
+