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bpf, selftests: Add three new sockmap tests for verdict only programs

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Here we add three new tests for sockmap to test having a verdict program
without setting the parser program.

The first test covers the most simply case,

   sender         proxy_recv proxy_send      recv
     |                |                       |
     |              verdict -----+            |
     |                |          |            |
     +----------------+          +------------+

We load the verdict program on the proxy_recv socket without a
parser program. It then does a redirect into the send path of the
proxy_send socket using sendpage_locked().

Next we test the drop case to ensure if we kfree_skb as a result of
the verdict program everything behaves as expected.

Next we test the same configuration above, but with ktls and a
redirect into socket ingress queue. Shown here

   tls                                       tls
   sender         proxy_recv proxy_send      recv
     |                |                       |
     |              verdict ------------------+
     |                |      redirect_ingress
     +----------------+

Also to set up ping/pong test

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/160239302638.8495.17125996694402793471.stgit@john-Precision-5820-Tower
This commit is contained in:
John Fastabend 2020-10-10 22:10:26 -07:00 committed by Alexei Starovoitov
parent cdf43c4bfa
commit a24fb420a5
1 changed files with 18 additions and 1 deletions
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19
tools/testing/selftests/bpf/test_sockmap.c
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@ -1472,12 +1472,29 @@ static void test_txmsg_skb(int cgrp, struct sockmap_options *opt)
txmsg_ktls_skb_drop = 0;
txmsg_ktls_skb_redir = 1;
test_exec(cgrp, opt);
txmsg_ktls_skb_redir = 0;
/* Tests that omit skb_parser */
txmsg_omit_skb_parser = 1;
ktls = 0;
txmsg_ktls_skb = 0;
test_exec(cgrp, opt);
txmsg_ktls_skb_drop = 1;
test_exec(cgrp, opt);
txmsg_ktls_skb_drop = 0;
txmsg_ktls_skb_redir = 1;
test_exec(cgrp, opt);
ktls = 1;
test_exec(cgrp, opt);
txmsg_omit_skb_parser = 0;
opt->data_test = data;
ktls = k;
}
/* Test cork with hung data. This tests poor usage patterns where
* cork can leave data on the ring if user program is buggy and
* doesn't flush them somehow. They do take some time however