kernel/tools/testing/selftests/bpf/progs/bpf_flow.c, branch linux-6.2.y

bpf, selftests: Test BPF_FLOW_DISSECTOR_CONTINUE

2022-08-23T20:48:12Z

The dissector program returns BPF_FLOW_DISSECTOR_CONTINUE (and avoids setting skb->flow_keys or last_dissection map) in case it encounters IP packets whose (outer) source address is 127.0.0.127. Additional test is added to prog_tests/flow_dissector.c which sets this address as test's pkk.iph.saddr, with the expected retval of BPF_FLOW_DISSECTOR_CONTINUE. Also, legacy test_flow_dissector.sh was similarly augmented. Signed-off-by: Shmulik Ladkani Signed-off-by: Daniel Borkmann Reviewed-by: Stanislav Fomichev Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20220821113519.116765-5-shmulik.ladkani@gmail.com

selftests/bpf: Normalize all the rest SEC() uses

2021-09-28T20:51:19Z

Normalize all the other non-conforming SEC() usages across all selftests. This is in preparation for libbpf to start to enforce stricter SEC() rules in libbpf 1.0 mode. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: Dave Marchevsky Link: https://lore.kernel.org/bpf/20210928161946.2512801-5-andrii@kernel.org

selftest/bpf: Fix IPV6FR handling in flow dissector

2020-11-16T15:23:29Z

From second fragment on, IPV6FR program must stop the dissection of IPV6 fragmented packet. This is the same approach used for IPV4 fragmentation. This fixes the flow keys calculation for the upper-layer protocols. Note that according to RFC8200, the first fragment packet must include the upper-layer header. Signed-off-by: Santucci Pierpaolo Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Link: https://lore.kernel.org/bpf/X7JUzUj34ceE2wBm@santucci.pierpaolo

bpf, selftests: Use bpf_tail_call_static where appropriate

2020-09-30T18:50:35Z

For those locations where we use an immediate tail call map index use the newly added bpf_tail_call_static() helper. Signed-off-by: Daniel Borkmann Signed-off-by: Alexei Starovoitov Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/3cfb2b799a62d22c6e7ae5897c23940bdcc24cbc.1601477936.git.daniel@iogearbox.net

selftests/bpf: Convert test_flow_dissector to use BPF skeleton

2020-06-01T22:21:03Z

Switch flow dissector test setup from custom BPF object loader to BPF skeleton to save boilerplate and prepare for testing higher-level API for attaching flow dissector with bpf_link. To avoid depending on program order in the BPF object when populating the flow dissector PROG_ARRAY map, change the program section names to contain the program index into the map. This follows the example set by tailcall tests. Signed-off-by: Jakub Sitnicki Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200531082846.2117903-12-jakub@cloudflare.com

selftests: Use consistent include paths for libbpf

2020-01-21T00:37:45Z

Fix all selftests to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Also ensure that all includes of exported libbpf header files (those that are exported on 'make install' of the library) use bracketed includes instead of quoted. To not break the build, keep the old include path until everything has been changed to the new one; a subsequent patch will remove that. Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") Signed-off-by: Toke Høiland-Jørgensen Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/157952560568.1683545.9649335788846513446.stgit@toke.dk

selftests/bpf: fix race in flow dissector tests

2019-08-13T14:31:10Z

Since the "last_dissection" map holds only the flow keys for the most recent packet, there is a small race in the skb-less flow dissector tests if a new packet comes between transmitting the test packet, and reading its keys from the map. If this happens, the test packet keys will be overwritten and the test will fail. Changing the "last_dissection" map to a hash map, keyed on the source/dest port pair resolves this issue. Additionally, let's clear the last test results from the map between tests to prevent previous test cases from interfering with the following test cases. Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: Petar Penkov Signed-off-by: Daniel Borkmann

selftests/bpf: support BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP

2019-07-26T01:00:41Z

Exit as soon as we found that packet is encapped when BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP is passed. Add appropriate selftest cases. v2: * Subtract sizeof(struct iphdr) from .iph_inner.tot_len (Willem de Bruijn) Acked-by: Petar Penkov Acked-by: Willem de Bruijn Acked-by: Song Liu Cc: Song Liu Cc: Willem de Bruijn Cc: Petar Penkov Signed-off-by: Stanislav Fomichev Signed-off-by: Alexei Starovoitov

bpf/flow_dissector: support ipv6 flow_label and BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL

2019-07-26T01:00:41Z

Add support for exporting ipv6 flow label via bpf_flow_keys. Export flow label from bpf_flow.c and also return early when BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL is passed. Acked-by: Petar Penkov Acked-by: Willem de Bruijn Acked-by: Song Liu Cc: Song Liu Cc: Willem de Bruijn Cc: Petar Penkov Signed-off-by: Stanislav Fomichev Signed-off-by: Alexei Starovoitov

selftests/bpf: support BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG

2019-07-26T01:00:41Z

bpf_flow.c: exit early unless BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG is passed in flags. Also, set ip_proto earlier, this makes sure we have correct value with fragmented packets. Add selftest cases to test ipv4/ipv6 fragments and skip eth_get_headlen tests that don't have BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG flag. eth_get_headlen calls flow dissector with BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG flag so we can't run tests that have different set of input flags against it. v2: * sefltests -> selftests (Willem de Bruijn) * Reword a comment about eth_get_headlen flags (Song Liu) Acked-by: Petar Penkov Acked-by: Willem de Bruijn Acked-by: Song Liu Cc: Song Liu Cc: Willem de Bruijn Cc: Petar Penkov Signed-off-by: Stanislav Fomichev Signed-off-by: Alexei Starovoitov