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3 commits

Author SHA1 Message Date
Martin KaFai Lau
edc2d66ad1 bpf: selftest: Use bpf_skc_to_tcp_sock() in the sock_fields test
This test uses bpf_skc_to_tcp_sock() to get a kernel tcp_sock ptr "ktp".
Access the ktp->lsndtime and also pass ktp to bpf_sk_storage_get().

It also exercises the bpf_sk_cgroup_id() and bpf_sk_ancestor_cgroup_id()
with the "ktp".  To do that, a parent cgroup and a child cgroup are
created.  The bpf prog is attached to the child cgroup.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200925000446.3858975-1-kafai@fb.com
2020-09-25 13:58:02 -07:00
Martin KaFai Lau
b18c1f0aa4 bpf: selftest: Adapt sock_fields test to use skel and global variables
skel is used.

Global variables are used to store the result from bpf prog.
addr_map, sock_result_map, and tcp_sock_result_map are gone.
Instead, global variables listen_tp, srv_sa6, cli_tp,, srv_tp,
listen_sk, srv_sk, and cli_sk are added.
Because of that, bpf_addr_array_idx and bpf_result_array_idx are also
no longer needed.

CHECK() macro from test_progs.h is reused and bail as soon as
a CHECK failure.

shutdown() is used to ensure the previous data-ack is received.
The bytes_acked, bytes_received, and the pkt_out_cnt checks are
using "<" to accommodate the final ack may not have been received/sent.
It is enough since it is not the focus of this test.

The sk local storage is all initialized to 0xeB9F now, so the
check_sk_pkt_out_cnt() always checks with the 0xeB9F base.  It is to
keep things simple.

The next patch will reuse helpers from network_helpers.h to simplify
things further.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200925000434.3858204-1-kafai@fb.com
2020-09-25 13:58:02 -07:00
Martin KaFai Lau
6f521a2bd2 bpf: selftest: Move sock_fields test into test_progs
This is a mechanical change to
1. move test_sock_fields.c to prog_tests/sock_fields.c
2. rename progs/test_sock_fields_kern.c to progs/test_sock_fields.c

Minimal change is made to the code itself.  Next patch will make
changes to use new ways of writing test, e.g. use skel and global
variables.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200925000427.3857814-1-kafai@fb.com
2020-09-25 13:58:02 -07:00
Renamed from tools/testing/selftests/bpf/progs/test_sock_fields_kern.c (Browse further)