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Date: Fri, 16 Feb 2024 16:19:20 +0800
From: Jeremy Kerr <jk@...econstruct.com.au>
To: netdev@...r.kernel.org
Cc: Matt Johnston <matt@...econstruct.com.au>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Simon Horman <horms@...nel.org>,
David Howells <dhowells@...hat.com>,
Alexander Lobakin <aleksander.lobakin@...el.com>,
Liang Chen <liangchen.linux@...il.com>,
Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH net-next 10/11] net: mctp: tests: Test that outgoing skbs have flow data populated
When CONFIG_MCTP_FLOWS is enabled, outgoing skbs should have their
SKB_EXT_MCTP extension set for drivers to consume.
Add two tests for local-to-output routing that check for the flow
extensions: one for the simple single-packet case, and one for
fragmentation.
Signed-off-by: Jeremy Kerr <jk@...econstruct.com.au>
---
net/mctp/test/route-test.c | 136 +++++++++++++++++++++++++++++++++++++
1 file changed, 136 insertions(+)
diff --git a/net/mctp/test/route-test.c b/net/mctp/test/route-test.c
index bad084525f17..eb7e9ac95612 100644
--- a/net/mctp/test/route-test.c
+++ b/net/mctp/test/route-test.c
@@ -837,6 +837,140 @@ static void mctp_test_route_input_multiple_nets_key(struct kunit *test)
mctp_test_route_input_multiple_nets_key_fini(test, &t2);
}
+#if IS_ENABLED(CONFIG_MCTP_FLOWS)
+
+static void mctp_test_flow_init(struct kunit *test,
+ struct mctp_test_dev **devp,
+ struct mctp_test_route **rtp,
+ struct socket **sock,
+ struct sk_buff **skbp,
+ unsigned int len)
+{
+ struct mctp_test_route *rt;
+ struct mctp_test_dev *dev;
+ struct sk_buff *skb;
+
+ /* we have a slightly odd routing setup here; the test route
+ * is for EID 8, which is our local EID. We don't do a routing
+ * lookup, so that's fine - all we require is a path through
+ * mctp_local_output, which will call rt->output on whatever
+ * route we provide
+ */
+ __mctp_route_test_init(test, &dev, &rt, sock, MCTP_NET_ANY);
+
+ /* Assign a single EID. ->addrs is freed on mctp netdev release */
+ dev->mdev->addrs = kmalloc(sizeof(u8), GFP_KERNEL);
+ dev->mdev->num_addrs = 1;
+ dev->mdev->addrs[0] = 8;
+
+ skb = alloc_skb(len + sizeof(struct mctp_hdr) + 1, GFP_KERNEL);
+ KUNIT_ASSERT_TRUE(test, skb);
+ __mctp_cb(skb);
+ skb_reserve(skb, sizeof(struct mctp_hdr) + 1);
+ memset(skb_put(skb, len), 0, len);
+
+ /* take a ref for the route, we'll decrement in local output */
+ refcount_inc(&rt->rt.refs);
+
+ *devp = dev;
+ *rtp = rt;
+ *skbp = skb;
+}
+
+static void mctp_test_flow_fini(struct kunit *test,
+ struct mctp_test_dev *dev,
+ struct mctp_test_route *rt,
+ struct socket *sock)
+{
+ __mctp_route_test_fini(test, dev, rt, sock);
+}
+
+/* test that an outgoing skb has the correct MCTP extension data set */
+static void mctp_test_packet_flow(struct kunit *test)
+{
+ struct sk_buff *skb, *skb2;
+ struct mctp_test_route *rt;
+ struct mctp_test_dev *dev;
+ struct mctp_flow *flow;
+ struct socket *sock;
+ u8 dst = 8;
+ int n, rc;
+
+ mctp_test_flow_init(test, &dev, &rt, &sock, &skb, 30);
+
+ rc = mctp_local_output(sock->sk, &rt->rt, skb, dst, MCTP_TAG_OWNER);
+ KUNIT_ASSERT_EQ(test, rc, 0);
+
+ n = rt->pkts.qlen;
+ KUNIT_ASSERT_EQ(test, n, 1);
+
+ skb2 = skb_dequeue(&rt->pkts);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb2);
+
+ flow = skb_ext_find(skb2, SKB_EXT_MCTP);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, flow);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, flow->key);
+ KUNIT_ASSERT_PTR_EQ(test, flow->key->sk, sock->sk);
+
+ kfree_skb(skb2);
+ mctp_test_flow_fini(test, dev, rt, sock);
+}
+
+/* test that outgoing skbs, after fragmentation, all have the correct MCTP
+ * extension data set.
+ */
+static void mctp_test_fragment_flow(struct kunit *test)
+{
+ struct mctp_flow *flows[2];
+ struct sk_buff *tx_skbs[2];
+ struct mctp_test_route *rt;
+ struct mctp_test_dev *dev;
+ struct sk_buff *skb;
+ struct socket *sock;
+ u8 dst = 8;
+ int n, rc;
+
+ mctp_test_flow_init(test, &dev, &rt, &sock, &skb, 100);
+
+ rc = mctp_local_output(sock->sk, &rt->rt, skb, dst, MCTP_TAG_OWNER);
+ KUNIT_ASSERT_EQ(test, rc, 0);
+
+ n = rt->pkts.qlen;
+ KUNIT_ASSERT_EQ(test, n, 2);
+
+ /* both resulting packets should have the same flow data */
+ tx_skbs[0] = skb_dequeue(&rt->pkts);
+ tx_skbs[1] = skb_dequeue(&rt->pkts);
+
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, tx_skbs[0]);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, tx_skbs[1]);
+
+ flows[0] = skb_ext_find(tx_skbs[0], SKB_EXT_MCTP);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, flows[0]);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, flows[0]->key);
+ KUNIT_ASSERT_PTR_EQ(test, flows[0]->key->sk, sock->sk);
+
+ flows[1] = skb_ext_find(tx_skbs[1], SKB_EXT_MCTP);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, flows[1]);
+ KUNIT_ASSERT_PTR_EQ(test, flows[1]->key, flows[0]->key);
+
+ kfree_skb(tx_skbs[0]);
+ kfree_skb(tx_skbs[1]);
+ mctp_test_flow_fini(test, dev, rt, sock);
+}
+
+#else
+static void mctp_test_packet_flow(struct kunit *test)
+{
+ kunit_skip(test, "Requires CONFIG_MCTP_FLOWS=y");
+}
+
+static void mctp_test_fragment_flow(struct kunit *test)
+{
+ kunit_skip(test, "Requires CONFIG_MCTP_FLOWS=y");
+}
+#endif
+
static struct kunit_case mctp_test_cases[] = {
KUNIT_CASE_PARAM(mctp_test_fragment, mctp_frag_gen_params),
KUNIT_CASE_PARAM(mctp_test_rx_input, mctp_rx_input_gen_params),
@@ -847,6 +981,8 @@ static struct kunit_case mctp_test_cases[] = {
mctp_route_input_sk_keys_gen_params),
KUNIT_CASE(mctp_test_route_input_multiple_nets_bind),
KUNIT_CASE(mctp_test_route_input_multiple_nets_key),
+ KUNIT_CASE(mctp_test_packet_flow),
+ KUNIT_CASE(mctp_test_fragment_flow),
{}
};
--
2.39.2
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