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From: Lorenzo Bianconi <lorenzo@kernel.org>
To: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
	andrii@kernel.org, davem@davemloft.net, kuba@kernel.org,
	edumazet@google.com, pabeni@redhat.com, pablo@netfilter.org,
	fw@strlen.de, netfilter-devel@vger.kernel.org,
	lorenzo.bianconi@redhat.com, brouer@redhat.com, toke@redhat.com,
	memxor@gmail.com
Subject: [PATCH v3 bpf-next 5/5] selftests/bpf: add selftest for bpf_xdp_ct_add and bpf_ct_refresh_timeout kfunc
Date: Wed, 18 May 2022 12:43:38 +0200	[thread overview]
Message-ID: <e95abdd9c6fa1fa97f3ca60e8eb06799784e671a.1652870182.git.lorenzo@kernel.org> (raw)
In-Reply-To: <cover.1652870182.git.lorenzo@kernel.org>

Introduce selftests for the following kfunc helpers:
- bpf_xdp_ct_add
- bpf_skb_ct_add
- bpf_ct_refresh_timeout

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../testing/selftests/bpf/prog_tests/bpf_nf.c |  4 ++
 .../testing/selftests/bpf/progs/test_bpf_nf.c | 72 +++++++++++++++----
 2 files changed, 64 insertions(+), 12 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
index dd30b1e3a67c..be6c5650892f 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
@@ -39,6 +39,10 @@ void test_bpf_nf_ct(int mode)
 	ASSERT_EQ(skel->bss->test_enonet_netns_id, -ENONET, "Test ENONET for bad but valid netns_id");
 	ASSERT_EQ(skel->bss->test_enoent_lookup, -ENOENT, "Test ENOENT for failed lookup");
 	ASSERT_EQ(skel->bss->test_eafnosupport, -EAFNOSUPPORT, "Test EAFNOSUPPORT for invalid len__tuple");
+	ASSERT_EQ(skel->bss->test_add_entry, 0, "Test for adding new entry");
+	ASSERT_EQ(skel->bss->test_succ_lookup, 0, "Test for successful lookup");
+	ASSERT_TRUE(skel->bss->test_delta_timeout > 9 && skel->bss->test_delta_timeout <= 10,
+		    "Test for ct timeout update");
 end:
 	test_bpf_nf__destroy(skel);
 }
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf.c b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
index f00a9731930e..361430dde3f7 100644
--- a/tools/testing/selftests/bpf/progs/test_bpf_nf.c
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <vmlinux.h>
 #include <bpf/bpf_helpers.h>
+#include <bpf/bpf_endian.h>
 
 #define EAFNOSUPPORT 97
 #define EPROTO 71
@@ -8,6 +9,8 @@
 #define EINVAL 22
 #define ENOENT 2
 
+extern unsigned long CONFIG_HZ __kconfig;
+
 int test_einval_bpf_tuple = 0;
 int test_einval_reserved = 0;
 int test_einval_netns_id = 0;
@@ -16,6 +19,9 @@ int test_eproto_l4proto = 0;
 int test_enonet_netns_id = 0;
 int test_enoent_lookup = 0;
 int test_eafnosupport = 0;
+int test_add_entry = 0;
+int test_succ_lookup = 0;
+u32 test_delta_timeout = 0;
 
 struct nf_conn;
 
@@ -26,31 +32,40 @@ struct bpf_ct_opts___local {
 	u8 reserved[3];
 } __attribute__((preserve_access_index));
 
+struct nf_conn *bpf_xdp_ct_add(struct xdp_md *, struct bpf_sock_tuple *, u32,
+			       struct bpf_ct_opts___local *, u32) __ksym;
 struct nf_conn *bpf_xdp_ct_lookup(struct xdp_md *, struct bpf_sock_tuple *, u32,
 				  struct bpf_ct_opts___local *, u32) __ksym;
+struct nf_conn *bpf_skb_ct_add(struct __sk_buff *, struct bpf_sock_tuple *, u32,
+			       struct bpf_ct_opts___local *, u32) __ksym;
 struct nf_conn *bpf_skb_ct_lookup(struct __sk_buff *, struct bpf_sock_tuple *, u32,
 				  struct bpf_ct_opts___local *, u32) __ksym;
 void bpf_ct_release(struct nf_conn *) __ksym;
+void bpf_ct_refresh_timeout(struct nf_conn *, u32) __ksym;
 
 static __always_inline void
-nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
-				   struct bpf_ct_opts___local *, u32),
+nf_ct_test(struct nf_conn *(*look_fn)(void *, struct bpf_sock_tuple *, u32,
+				      struct bpf_ct_opts___local *, u32),
+	   struct nf_conn *(*add_fn)(void *, struct bpf_sock_tuple *, u32,
+				     struct bpf_ct_opts___local *, u32),
 	   void *ctx)
 {
 	struct bpf_ct_opts___local opts_def = { .l4proto = IPPROTO_TCP, .netns_id = -1 };
 	struct bpf_sock_tuple bpf_tuple;
 	struct nf_conn *ct;
+	int err;
 
 	__builtin_memset(&bpf_tuple, 0, sizeof(bpf_tuple.ipv4));
 
-	ct = func(ctx, NULL, 0, &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, NULL, 0, &opts_def, sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_bpf_tuple = opts_def.error;
 
 	opts_def.reserved[0] = 1;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def));
 	opts_def.reserved[0] = 0;
 	opts_def.l4proto = IPPROTO_TCP;
 	if (ct)
@@ -59,21 +74,24 @@ nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
 		test_einval_reserved = opts_def.error;
 
 	opts_def.netns_id = -2;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def));
 	opts_def.netns_id = -1;
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_netns_id = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def) - 1);
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def) - 1);
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_einval_len_opts = opts_def.error;
 
 	opts_def.l4proto = IPPROTO_ICMP;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def));
 	opts_def.l4proto = IPPROTO_TCP;
 	if (ct)
 		bpf_ct_release(ct);
@@ -81,37 +99,67 @@ nf_ct_test(struct nf_conn *(*func)(void *, struct bpf_sock_tuple *, u32,
 		test_eproto_l4proto = opts_def.error;
 
 	opts_def.netns_id = 0xf00f;
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def));
 	opts_def.netns_id = -1;
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_enonet_netns_id = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		     sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_enoent_lookup = opts_def.error;
 
-	ct = func(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4) - 1, &opts_def, sizeof(opts_def));
+	ct = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4) - 1, &opts_def,
+		     sizeof(opts_def));
 	if (ct)
 		bpf_ct_release(ct);
 	else
 		test_eafnosupport = opts_def.error;
+
+	bpf_tuple.ipv4.saddr = bpf_get_prandom_u32(); /* src IP */
+	bpf_tuple.ipv4.daddr = bpf_get_prandom_u32(); /* dst IP */
+	bpf_tuple.ipv4.sport = bpf_htons(bpf_get_prandom_u32()); /* src port */
+	bpf_tuple.ipv4.dport = bpf_htons(bpf_get_prandom_u32()); /* dst port */
+
+	ct = add_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		    sizeof(opts_def));
+	if (ct) {
+		struct nf_conn *ct_lk;
+
+		ct_lk = look_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4),
+				&opts_def, sizeof(opts_def));
+		if (ct_lk) {
+			/* update ct entry timeout */
+			bpf_ct_refresh_timeout(ct_lk, 10000);
+			test_delta_timeout = ct_lk->timeout - bpf_jiffies64();
+			test_delta_timeout /= CONFIG_HZ;
+			bpf_ct_release(ct_lk);
+		} else {
+			test_succ_lookup = opts_def.error;
+		}
+		bpf_ct_release(ct);
+	} else {
+		test_add_entry = opts_def.error;
+		test_succ_lookup = opts_def.error;
+	}
 }
 
 SEC("xdp")
 int nf_xdp_ct_test(struct xdp_md *ctx)
 {
-	nf_ct_test((void *)bpf_xdp_ct_lookup, ctx);
+	nf_ct_test((void *)bpf_xdp_ct_lookup, (void *)bpf_xdp_ct_add, ctx);
 	return 0;
 }
 
 SEC("tc")
 int nf_skb_ct_test(struct __sk_buff *ctx)
 {
-	nf_ct_test((void *)bpf_skb_ct_lookup, ctx);
+	nf_ct_test((void *)bpf_skb_ct_lookup, (void *)bpf_skb_ct_add, ctx);
 	return 0;
 }
 
-- 
2.35.3


  parent reply	other threads:[~2022-05-18 10:44 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-18 10:43 [PATCH v3 bpf-next 0/5] net: netfilter: add kfunc helper to update ct timeout Lorenzo Bianconi
2022-05-18 10:43 ` [PATCH v3 bpf-next 1/5] bpf: Add support for forcing kfunc args to be referenced Lorenzo Bianconi
2022-05-18 17:58   ` Yonghong Song
2022-05-18 18:06     ` Kumar Kartikeya Dwivedi
2022-05-18 18:23       ` Yonghong Song
2022-05-18 10:43 ` [PATCH v3 bpf-next 2/5] selftests/bpf: Add verifier selftests for forced kfunc ref args Lorenzo Bianconi
2022-05-18 18:25   ` Yonghong Song
2022-05-18 10:43 ` [PATCH v3 bpf-next 3/5] net: netfilter: add kfunc helper to update ct timeout Lorenzo Bianconi
2022-05-18 20:42   ` Toke Høiland-Jørgensen
2022-05-18 10:43 ` [PATCH v3 bpf-next 4/5] net: netfilter: add kfunc helper to add a new ct entry Lorenzo Bianconi
2022-05-18 20:47   ` Toke Høiland-Jørgensen
2022-05-18 21:08     ` Lorenzo Bianconi
2022-05-18 22:14       ` Alexei Starovoitov
2022-05-18 22:43         ` Kumar Kartikeya Dwivedi
2022-05-19 10:45           ` Toke Høiland-Jørgensen
2022-05-19 11:23             ` Kumar Kartikeya Dwivedi
2022-05-19 17:00               ` Yonghong Song
2022-05-19 17:10                 ` Kumar Kartikeya Dwivedi
2022-05-19  2:06   ` kernel test robot
2022-05-18 10:43 ` Lorenzo Bianconi [this message]
2022-05-18 18:55   ` [PATCH v3 bpf-next 5/5] selftests/bpf: add selftest for bpf_xdp_ct_add and bpf_ct_refresh_timeout kfunc Yonghong Song
2022-05-18 20:38     ` Lorenzo Bianconi
2022-05-20 22:04   ` Andrii Nakryiko
2022-05-21  9:56     ` Lorenzo Bianconi

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