selftests/bpf: Move existing common networking parts into network_helpers

1. Move pkt_v4 and pkt_v6 into network_helpers and adjust the users.
2. Copy-paste spin_lock_thread into two tests that use it.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Andrey Ignatov <rdna@fb.com>
Link: https://lore.kernel.org/bpf/20200508174611.228805-3-sdf@google.com

tools/testing/selftests/bpf/network_helpers.c

@@ -14,6 +14,23 @@
 #define log_err(MSG, ...) fprintf(stderr, "(%s:%d: errno: %s) " MSG "\n", \
 	__FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
 
+struct ipv4_packet pkt_v4 = {
+	.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
+	.iph.ihl = 5,
+	.iph.protocol = IPPROTO_TCP,
+	.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
+	.tcp.urg_ptr = 123,
+	.tcp.doff = 5,
+};
+
+struct ipv6_packet pkt_v6 = {
+	.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
+	.iph.nexthdr = IPPROTO_TCP,
+	.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
+	.tcp.urg_ptr = 123,
+	.tcp.doff = 5,
+};
+
 int start_server(int family, int type)
 {
 	struct sockaddr_storage addr = {};

tools/testing/selftests/bpf/network_helpers.h

@@ -3,6 +3,35 @@
 #define __NETWORK_HELPERS_H
 #include <sys/socket.h>
 #include <sys/types.h>
+#include <linux/types.h>
+typedef __u16 __sum16;
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <netinet/tcp.h>
+#include <bpf/bpf_endian.h>
+
+#define MAGIC_VAL 0x1234
+#define NUM_ITER 100000
+#define VIP_NUM 5
+#define MAGIC_BYTES 123
+
+/* ipv4 test vector */
+struct ipv4_packet {
+	struct ethhdr eth;
+	struct iphdr iph;
+	struct tcphdr tcp;
+} __packed;
+extern struct ipv4_packet pkt_v4;
+
+/* ipv6 test vector */
+struct ipv6_packet {
+	struct ethhdr eth;
+	struct ipv6hdr iph;
+	struct tcphdr tcp;
+} __packed;
+extern struct ipv6_packet pkt_v6;
 
 int start_server(int family, int type);
 int connect_to_fd(int family, int type, int server_fd);

tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (c) 2019 Facebook */
 #include <test_progs.h>
+#include <network_helpers.h>
 
 static void test_fexit_bpf2bpf_common(const char *obj_file,
 				      const char *target_obj_file,

tools/testing/selftests/bpf/prog_tests/flow_dissector.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 #include <error.h>
 #include <linux/if.h>
 #include <linux/if_tun.h>

tools/testing/selftests/bpf/prog_tests/flow_dissector_load_bytes.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_flow_dissector_load_bytes(void)
 {

tools/testing/selftests/bpf/prog_tests/global_data.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 static void test_global_data_number(struct bpf_object *obj, __u32 duration)
 {

tools/testing/selftests/bpf/prog_tests/kfree_skb.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 struct meta {
 	int ifindex;

tools/testing/selftests/bpf/prog_tests/l4lb_all.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 static void test_l4lb(const char *file)
 {

tools/testing/selftests/bpf/prog_tests/map_lock.c

@@ -1,5 +1,19 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
+
+static void *spin_lock_thread(void *arg)
+{
+	__u32 duration, retval;
+	int err, prog_fd = *(u32 *) arg;
+
+	err = bpf_prog_test_run(prog_fd, 10000, &pkt_v4, sizeof(pkt_v4),
+				NULL, NULL, &retval, &duration);
+	CHECK(err || retval, "",
+	      "err %d errno %d retval %d duration %d\n",
+	      err, errno, retval, duration);
+	pthread_exit(arg);
+}
 
 static void *parallel_map_access(void *arg)
 {

tools/testing/selftests/bpf/prog_tests/pkt_access.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_pkt_access(void)
 {

tools/testing/selftests/bpf/prog_tests/pkt_md_access.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_pkt_md_access(void)
 {

tools/testing/selftests/bpf/prog_tests/prog_run_xattr.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_prog_run_xattr(void)
 {

tools/testing/selftests/bpf/prog_tests/queue_stack_map.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 enum {
 	QUEUE,

tools/testing/selftests/bpf/prog_tests/signal_pending.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 static void sigalrm_handler(int s) {}
 static struct sigaction sigalrm_action = {

tools/testing/selftests/bpf/prog_tests/skb_ctx.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_skb_ctx(void)
 {

tools/testing/selftests/bpf/prog_tests/spinlock.c

@@ -1,5 +1,19 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
+
+static void *spin_lock_thread(void *arg)
+{
+	__u32 duration, retval;
+	int err, prog_fd = *(u32 *) arg;
+
+	err = bpf_prog_test_run(prog_fd, 10000, &pkt_v4, sizeof(pkt_v4),
+				NULL, NULL, &retval, &duration);
+	CHECK(err || retval, "",
+	      "err %d errno %d retval %d duration %d\n",
+	      err, errno, retval, duration);
+	pthread_exit(arg);
+}
 
 void test_spinlock(void)
 {

tools/testing/selftests/bpf/prog_tests/xdp.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_xdp(void)
 {

tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_xdp_adjust_tail(void)
 {

tools/testing/selftests/bpf/prog_tests/xdp_bpf2bpf.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 #include <net/if.h>
 #include "test_xdp.skel.h"
 #include "test_xdp_bpf2bpf.skel.h"

tools/testing/selftests/bpf/prog_tests/xdp_noinline.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include <network_helpers.h>
 
 void test_xdp_noinline(void)
 {

tools/testing/selftests/bpf/test_progs.c

@@ -222,23 +222,6 @@ int test__join_cgroup(const char *path)
 	return fd;
 }
 
-struct ipv4_packet pkt_v4 = {
-	.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
-	.iph.ihl = 5,
-	.iph.protocol = IPPROTO_TCP,
-	.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
-	.tcp.urg_ptr = 123,
-	.tcp.doff = 5,
-};
-
-struct ipv6_packet pkt_v6 = {
-	.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
-	.iph.nexthdr = IPPROTO_TCP,
-	.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
-	.tcp.urg_ptr = 123,
-	.tcp.doff = 5,
-};
-
 int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
 {
 	struct bpf_map *map;
@@ -358,19 +341,6 @@ err:
 	return -1;
 }
 
-void *spin_lock_thread(void *arg)
-{
-	__u32 duration, retval;
-	int err, prog_fd = *(u32 *) arg;
-
-	err = bpf_prog_test_run(prog_fd, 10000, &pkt_v4, sizeof(pkt_v4),
-				NULL, NULL, &retval, &duration);
-	CHECK(err || retval, "",
-	      "err %d errno %d retval %d duration %d\n",
-	      err, errno, retval, duration);
-	pthread_exit(arg);
-}
-
 /* extern declarations for test funcs */
 #define DEFINE_TEST(name) extern void test_##name(void);
 #include <prog_tests/tests.h>

tools/testing/selftests/bpf/test_progs.h

@@ -87,24 +87,6 @@ extern void test__skip(void);
 extern void test__fail(void);
 extern int test__join_cgroup(const char *path);
 
-#define MAGIC_BYTES 123
-
-/* ipv4 test vector */
-struct ipv4_packet {
-	struct ethhdr eth;
-	struct iphdr iph;
-	struct tcphdr tcp;
-} __packed;
-extern struct ipv4_packet pkt_v4;
-
-/* ipv6 test vector */
-struct ipv6_packet {
-	struct ethhdr eth;
-	struct ipv6hdr iph;
-	struct tcphdr tcp;
-} __packed;
-extern struct ipv6_packet pkt_v6;
-
 #define PRINT_FAIL(format...)                                                  \
 	({                                                                     \
 		test__fail();                                                  \
@@ -143,10 +125,6 @@ extern struct ipv6_packet pkt_v6;
 #define CHECK_ATTR(condition, tag, format...) \
 	_CHECK(condition, tag, tattr.duration, format)
 
-#define MAGIC_VAL 0x1234
-#define NUM_ITER 100000
-#define VIP_NUM 5
-
 static inline __u64 ptr_to_u64(const void *ptr)
 {
 	return (__u64) (unsigned long) ptr;
@@ -156,7 +134,6 @@ int bpf_find_map(const char *test, struct bpf_object *obj, const char *name);
 int compare_map_keys(int map1_fd, int map2_fd);
 int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len);
 int extract_build_id(char *build_id, size_t size);
-void *spin_lock_thread(void *arg);
 
 #ifdef __x86_64__
 #define SYS_NANOSLEEP_KPROBE_NAME "__x64_sys_nanosleep"