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bpf: Add support for reading sk_state and more

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Add support for reading many more tcp_sock fields

  state,	same as sk->sk_state
  rtt_min	same as sk->rtt_min.s[0].v (current rtt_min)
  snd_ssthresh
  rcv_nxt
  snd_nxt
  snd_una
  mss_cache
  ecn_flags
  rate_delivered
  rate_interval_us
  packets_out
  retrans_out
  total_retrans
  segs_in
  data_segs_in
  segs_out
  data_segs_out
  lost_out
  sacked_out
  sk_txhash
  bytes_received (__u64)
  bytes_acked    (__u64)

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lawrence Brakmo
2018-01-25 16:14:12 -08:00
committed by Alexei Starovoitov
parent f89013f66d
commit 44f0e43037
2 changed files with 157 additions and 14 deletions
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22
include/uapi/linux/bpf.h
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@@ -979,6 +979,28 @@ struct bpf_sock_ops {
__u32 snd_cwnd;
__u32 srtt_us; /* Averaged RTT << 3 in usecs */
__u32 bpf_sock_ops_cb_flags; /* flags defined in uapi/linux/tcp.h */
__u32 state;
__u32 rtt_min;
__u32 snd_ssthresh;
__u32 rcv_nxt;
__u32 snd_nxt;
__u32 snd_una;
__u32 mss_cache;
__u32 ecn_flags;
__u32 rate_delivered;
__u32 rate_interval_us;
__u32 packets_out;
__u32 retrans_out;
__u32 total_retrans;
__u32 segs_in;
__u32 data_segs_in;
__u32 segs_out;
__u32 data_segs_out;
__u32 lost_out;
__u32 sacked_out;
__u32 sk_txhash;
__u64 bytes_received;
__u64 bytes_acked;
};
/* Definitions for bpf_sock_ops_cb_flags */