From 6de4a9c430b57c6ebbccd2a1725f42e9be75f592 Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Wed, 22 Jan 2020 15:36:58 -0800 Subject: bpf: tcp: Add bpf_cubic example This patch adds a bpf_cubic example. Some highlights: 1. CONFIG_HZ .kconfig map is used. 2. In bictcp_update(), calculation is changed to use usec resolution (i.e. USEC_PER_JIFFY) instead of using jiffies. Thus, usecs_to_jiffies() is not used in the bpf_cubic.c. 3. In bitctcp_update() [under tcp_friendliness], the original "while (ca->ack_cnt > delta)" loop is changed to the equivalent "ca->ack_cnt / delta" operation. Signed-off-by: Martin KaFai Lau Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200122233658.903774-1-kafai@fb.com --- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'tools/testing/selftests/bpf/bpf_tcp_helpers.h') diff --git a/tools/testing/selftests/bpf/bpf_tcp_helpers.h b/tools/testing/selftests/bpf/bpf_tcp_helpers.h index 6fee732f0297..8f21965ffc6c 100644 --- a/tools/testing/selftests/bpf/bpf_tcp_helpers.h +++ b/tools/testing/selftests/bpf/bpf_tcp_helpers.h @@ -6,13 +6,28 @@ #include #include #include +#include "bpf_trace_helpers.h" + +#define BPF_STRUCT_OPS(name, args...) \ +SEC("struct_ops/"#name) \ +BPF_PROG(name, args) + +#define tcp_jiffies32 ((__u32)bpf_jiffies64()) struct sock_common { unsigned char skc_state; } __attribute__((preserve_access_index)); +enum sk_pacing { + SK_PACING_NONE = 0, + SK_PACING_NEEDED = 1, + SK_PACING_FQ = 2, +}; + struct sock { struct sock_common __sk_common; + unsigned long sk_pacing_rate; + __u32 sk_pacing_status; /* see enum sk_pacing */ } __attribute__((preserve_access_index)); struct inet_sock { @@ -54,6 +69,7 @@ struct tcp_sock { __u32 max_packets_out; __u32 lsndtime; __u32 prior_cwnd; + __u64 tcp_mstamp; /* most recent packet received/sent */ } __attribute__((preserve_access_index)); static __always_inline struct inet_connection_sock *inet_csk(const struct sock *sk) -- cgit v1.2.3