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bpf: selftest: Test batching and bpf_(get|set)sockopt in bpf tcp iter

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This patch adds tests for the batching and bpf_(get|set)sockopt in
bpf tcp iter.

It first creates:
a) 1 non SO_REUSEPORT listener in lhash2.
b) 256 passive and active fds connected to the listener in (a).
c) 256 SO_REUSEPORT listeners in one of the lhash2 bucket.

The test sets all listeners and connections to bpf_cubic before
running the bpf iter.

The bpf iter then calls setsockopt(TCP_CONGESTION) to switch
each listener and connection from bpf_cubic to bpf_dctcp.

The bpf iter has a random_retry mode such that it can return EAGAIN
to the usespace in the middle of a batch.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210701200625.1036874-1-kafai@fb.com
This commit is contained in:
Martin KaFai Lau 2021-07-01 13:06:25 -07:00 • committed by Andrii Nakryiko
parent 3cee6fb8e6
commit eed92afdd1
5 changed files with 384 additions and 9 deletions
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6
tools/testing/selftests/bpf/progs/bpf_tracing_net.h
View file

@ -5,6 +5,10 @@
#define AF_INET 2
#define AF_INET6 10
#define SOL_TCP 6
#define TCP_CONGESTION 13
#define TCP_CA_NAME_MAX 16
#define ICSK_TIME_RETRANS 1
#define ICSK_TIME_PROBE0 3
#define ICSK_TIME_LOSS_PROBE 5
@ -32,6 +36,8 @@
#define ir_v6_rmt_addr req.__req_common.skc_v6_daddr
#define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr
#define sk_num __sk_common.skc_num
#define sk_dport __sk_common.skc_dport
#define sk_family __sk_common.skc_family
#define sk_rmem_alloc sk_backlog.rmem_alloc
#define sk_refcnt __sk_common.skc_refcnt