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| author | Mattia Meleleo <mattia.meleleo@coralogix.com> | 2026-07-08 18:55:01 +0200 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-07-15 11:10:14 +0200 |
| commit | a42f05cc4c1d49e27bbc6f65415aa76274ef7736 (patch) | |
| tree | c75b615f723900f318e176c03ff260947a79ce65 /tools/testing | |
| parent | 04af4efde58a4a4ef4feab7360c46af9ec0b83a0 (diff) | |
selftests/bpf: Test FIONREAD on a sockmap socket without a verdict program
Add a test validating that FIONREAD on a TCP socket in a sockmap
without a verdict program reports data pending in sk_receive_queue.
Signed-off-by: Mattia Meleleo <mattia.meleleo@coralogix.com>
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20260708-fionread-no-verdict-v3-2-b4ee31b3af53@coralogix.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c index 2d22a9058a8e..e5fc038d747b 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c @@ -1373,6 +1373,43 @@ end: test_sockmap_pass_prog__destroy(skel); } +/* A socket in a sockmap without a verdict program keeps its ingress data + * in sk_receive_queue: FIONREAD must account for it. + */ +static void test_sockmap_no_verdict_fionread(void) +{ + int err, map, zero = 0, sent, avail; + int c0 = -1, c1 = -1, p0 = -1, p1 = -1; + struct test_sockmap_pass_prog *skel; + char buf[256] = "0123456789"; + + skel = test_sockmap_pass_prog__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + return; + map = bpf_map__fd(skel->maps.sock_map_rx); + + err = create_socket_pairs(AF_INET, SOCK_STREAM, &c0, &c1, &p0, &p1); + if (!ASSERT_OK(err, "create_socket_pairs()")) + goto out; + + err = bpf_map_update_elem(map, &zero, &c1, BPF_NOEXIST); + if (!ASSERT_OK(err, "bpf_map_update_elem(c1)")) + goto out_close; + + sent = xsend(p1, &buf, sizeof(buf), 0); + ASSERT_EQ(sent, sizeof(buf), "xsend(p1)"); + avail = wait_for_fionread(c1, sizeof(buf), IO_TIMEOUT_SEC); + ASSERT_EQ(avail, sizeof(buf), "ioctl(FIONREAD)"); + +out_close: + close(c0); + close(p0); + close(c1); + close(p1); +out: + test_sockmap_pass_prog__destroy(skel); +} + void test_sockmap_basic(void) { if (test__start_subtest("sockmap create_update_free")) @@ -1415,6 +1452,8 @@ void test_sockmap_basic(void) test_sockmap_skb_verdict_shutdown(); if (test__start_subtest("sockmap skb_verdict fionread")) test_sockmap_skb_verdict_fionread(true); + if (test__start_subtest("sockmap no_verdict fionread")) + test_sockmap_no_verdict_fionread(); if (test__start_subtest("sockmap skb_verdict fionread on drop")) test_sockmap_skb_verdict_fionread(false); if (test__start_subtest("sockmap skb_verdict change tail")) |