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383724e17a
linux_dsm_epyc7002/tools/testing/selftests/bpf
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Andrey Ignatov 383724e17a selftests/bpf: Add connect_fd_to_fd, connect_wait net helpers 
Add two new network helpers.

connect_fd_to_fd connects an already created client socket fd to address
of server fd. Sometimes it's useful to separate client socket creation
and connecting this socket to a server, e.g. if client socket has to be
created in a cgroup different from that of server cgroup.

Additionally connect_to_fd is now implemented using connect_fd_to_fd,
both helpers don't treat EINPROGRESS as an error and let caller decide
how to proceed with it.

connect_wait is a helper to work with non-blocking client sockets so
that if connect_to_fd or connect_fd_to_fd returned -1 with errno ==
EINPROGRESS, caller can wait for connect to finish or for connection
timeout. The helper returns -1 on error, 0 on timeout (1sec,
hard-coded), and positive number on success.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/1403fab72300f379ca97ead4820ae43eac4414ef.1589486450.git.rdna@fb.com
2020-05-14 18:41:08 -07:00
..
benchs selftest/bpf: Add BPF triggering benchmark 2020-05-13 12:19:38 -07:00
gnu
map_tests .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
prog_tests selftest/bpf: Fmod_ret prog and implement test_overhead as part of bench 2020-05-13 12:19:38 -07:00
progs selftest/bpf: Add BPF triggering benchmark 2020-05-13 12:19:38 -07:00
verifier selftests/bpf: Test allowed maps for bpf_sk_select_reuseport 2020-04-30 16:21:14 +02:00
.gitignore selftests/bpf: Add benchmark runner infrastructure 2020-05-13 12:19:38 -07:00
bench.c selftest/bpf: Fix spelling mistake "SIGALARM" -> "SIGALRM" 2020-05-14 18:39:06 -07:00
bench.h selftests/bpf: Add benchmark runner infrastructure 2020-05-13 12:19:38 -07:00
bpf_legacy.h selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.h 2019-10-08 23:16:03 +02:00
bpf_rand.h
bpf_rlimit.h
bpf_tcp_helpers.h libbpf: Merge selftests' bpf_trace_helpers.h into libbpf's bpf_tracing.h 2020-03-02 16:25:14 -08:00
bpf_util.h selftests: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
cgroup_helpers.c selftests/bpf: Correct path to include msg + path 2019-10-03 17:21:57 +02:00
cgroup_helpers.h
config selftests/bpf: Use reno instead of dctcp 2020-05-01 16:51:07 -07:00
flow_dissector_load.c
flow_dissector_load.h
get_cgroup_id_user.c
Makefile selftest/bpf: Add BPF triggering benchmark 2020-05-13 12:19:38 -07:00
netcnt_common.h
network_helpers.c selftests/bpf: Add connect_fd_to_fd, connect_wait net helpers 2020-05-14 18:41:08 -07:00
network_helpers.h selftests/bpf: Add connect_fd_to_fd, connect_wait net helpers 2020-05-14 18:41:08 -07:00
README.rst tools/bpf: selftests : Explain bpf_iter test failures with llvm 10.0.0 2020-05-13 12:30:49 -07:00
tcp_client.py
tcp_server.py
test_align.c selftests/bpf: fix test_align liveliness expectations 2019-07-06 00:16:56 +02:00
test_bpftool_build.sh selftests, bpftool: Skip the build test if not in tree 2019-11-24 16:58:45 -08:00
test_bpftool.py selftests/bpf: Add test for "bpftool feature" command 2020-02-26 18:34:34 +01:00
test_bpftool.sh selftests/bpf: Add test for "bpftool feature" command 2020-02-26 18:34:34 +01:00
test_btf.c selftests/bpf: Fix a couple of broken test_btf cases 2020-04-24 17:47:40 -07:00
test_btf.h
test_cgroup_storage.c selftests/bpf: fix test_cgroup_storage on s390 2019-08-21 16:55:01 +02:00
test_cpp.cpp selftests: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_current_pid_tgid_new_ns.c tools/testing/selftests/bpf: Add self-tests for new helper bpf_get_ns_current_pid_tgid. 2020-03-12 17:40:47 -07:00
test_dev_cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_flow_dissector.c
test_flow_dissector.sh selftests/bpf: Add test based on port range for BPF flow dissector 2020-01-27 11:25:07 +01:00
test_ftrace.sh selftests/bpf: Test function_graph tracer and bpf trampoline together 2019-12-11 15:19:29 -08:00
test_iptunnel_common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_kmod.sh
test_lirc_mode2_user.c
test_lirc_mode2.sh
test_lpm_map.c bpf: lpm_trie: check left child of last leftmost node for NULL 2019-06-11 13:52:37 +02:00
test_lru_map.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
test_lwt_ip_encap.sh selftests/bpf: More compatible nc options in test_lwt_ip_encap 2019-10-08 23:59:22 +02:00
test_lwt_seg6local.sh
test_maps.c bpf, sockmap: Allow inserting listening TCP sockets into sockmap 2020-02-21 22:29:45 +01:00
test_maps.h
test_netcnt.c
test_offload.py selftests: bpf: log direct file writes 2019-11-06 09:59:58 -08:00
test_progs.c selftests/bpf: Extract parse_num_list into generic testing_helpers.c 2020-05-13 12:19:38 -07:00
test_progs.h selftests/bpf: Extract parse_num_list into generic testing_helpers.c 2020-05-13 12:19:38 -07:00
test_select_reuseport_common.h
test_skb_cgroup_id_user.c selftests/bpf: Don't hard-code root cgroup id 2019-12-04 17:56:22 -08:00
test_skb_cgroup_id.sh
test_sock_addr.c selftests/bpf: Test narrow loads for bpf_sock_addr.user_port 2020-05-14 18:30:57 -07:00
test_sock_addr.sh
test_sock_fields.c selftests: bpf: enable hi32 randomization for all tests 2019-05-24 18:58:37 -07:00
test_sock.c selftests: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_socket_cookie.c selftests/bpf: convert socket_cookie test to sk storage 2019-06-15 01:21:59 +02:00
test_sockmap_kern.h selftests: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_sockmap.c selftests: bpf: Use a temporary file in test_sockmap 2020-01-24 22:12:13 +01:00
test_stub.c selftests/bpf: Integrate verbose verifier log into test_progs 2019-11-24 16:58:45 -08:00
test_sysctl.c selftests: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
test_tag.c
test_tc_edt.sh selftests/bpf: More compatible nc options in test_tc_edt 2019-10-18 22:33:57 +02:00
test_tc_tunnel.sh selftests, bpf: Fix test_tc_tunnel hanging 2019-11-18 21:31:49 +01:00
test_tcp_check_syncookie_user.c selftests/bpf: add test for bpf_tcp_gen_syncookie 2019-07-30 21:03:05 -07:00
test_tcp_check_syncookie.sh selftests/bpf: add test for bpf_tcp_gen_syncookie 2019-07-30 21:03:05 -07:00
test_tcpbpf_user.c selftests/bpf: De-flake test_tcpbpf 2019-12-04 18:01:05 -08:00
test_tcpbpf.h selftests/bpf: De-flake test_tcpbpf 2019-12-04 18:01:05 -08:00
test_tcpnotify_user.c selftests/bpf: switch test_tcpnotify to perf_buffer API 2019-07-23 16:05:42 -07:00
test_tcpnotify.h
test_tunnel.sh selftests/bpf: fail test_tunnel.sh if subtests fail 2019-05-28 11:08:57 +02:00
test_verifier_log.c
test_verifier.c selftests/bpf: Test allowed maps for bpf_sk_select_reuseport 2020-04-30 16:21:14 +02:00
test_xdp_meta.sh
test_xdp_redirect.sh
test_xdp_veth.sh selftests, bpf: Add test for veth native XDP 2019-06-24 18:18:30 -07:00
test_xdp_vlan_mode_generic.sh selftests/bpf: add wrapper scripts for test_xdp_vlan.sh 2019-08-05 11:17:40 -07:00
test_xdp_vlan_mode_native.sh selftests/bpf: add wrapper scripts for test_xdp_vlan.sh 2019-08-05 11:17:40 -07:00
test_xdp_vlan.sh selftests/bpf: reduce time to execute test_xdp_vlan.sh 2019-08-05 11:17:40 -07:00
test_xdping.sh selftests/bpf: measure RTT from xdp using xdping 2019-05-31 19:53:45 -07:00
testing_helpers.c selftests/bpf: Extract parse_num_list into generic testing_helpers.c 2020-05-13 12:19:38 -07:00
testing_helpers.h selftests/bpf: Extract parse_num_list into generic testing_helpers.c 2020-05-13 12:19:38 -07:00
trace_helpers.c samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
trace_helpers.h samples, bpf: Move read_trace_pipe to trace_helpers 2020-03-23 22:27:51 +01:00
urandom_read.c
with_addr.sh
with_tunnels.sh
xdping.c selftests: bpf: correct perror strings 2019-11-28 22:40:30 -08:00
xdping.h selftests/bpf: measure RTT from xdp using xdping 2019-05-31 19:53:45 -07:00

README.rst 

==================
BPF Selftest Notes
==================

Additional information about selftest failures are
documented here.

bpf_iter test failures with clang/llvm 10.0.0
=============================================

With clang/llvm 10.0.0, the following two bpf_iter tests failed:
  * ``bpf_iter/ipv6_route``
  * ``bpf_iter/netlink``

The symptom for ``bpf_iter/ipv6_route`` looks like

.. code-block:: c

  2: (79) r8 = *(u64 *)(r1 +8)
  ...
  14: (bf) r2 = r8
  15: (0f) r2 += r1
  ; BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen);
  16: (7b) *(u64 *)(r8 +64) = r2
  only read is supported

The symptom for ``bpf_iter/netlink`` looks like

.. code-block:: c

  ; struct netlink_sock *nlk = ctx->sk;
  2: (79) r7 = *(u64 *)(r1 +8)
  ...
  15: (bf) r2 = r7
  16: (0f) r2 += r1
  ; BPF_SEQ_PRINTF(seq, "%pK %-3d ", s, s->sk_protocol);
  17: (7b) *(u64 *)(r7 +0) = r2
  only read is supported

This is due to a llvm BPF backend bug. The fix 
  https://reviews.llvm.org/D78466
has been pushed to llvm 10.x release branch and will be
available in 10.0.1. The fix is available in llvm 11.0.0 trunk.