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(parent: 6f9bd3d) | patch
bpf: Add BPF_SOCK_OPS_RETRANS_CB
authorLawrence Brakmo <brakmo@fb.com>
Fri, 26 Jan 2018 00:14:14 +0000 (16:14 -0800)
committerAlexei Starovoitov <ast@kernel.org>
Fri, 26 Jan 2018 00:41:14 +0000 (16:41 -0800)
commita31ad29e6a30cb0b9084a9425b819cdcd97273ce
tree33ed37e633027ebf8b53a289eaddc687b1756368tree | snapshot
parent6f9bd3d731aac0d2ac21dd78a642af5df38fb5c5commit | diff
bpf: Add BPF_SOCK_OPS_RETRANS_CB

Adds support for calling sock_ops BPF program when there is a
retransmission. Three arguments are used; one for the sequence number,
another for the number of segments retransmitted, and the last one for
the return value of tcp_transmit_skb (0 => success).
Does not include syn-ack retransmissions.

New op: BPF_SOCK_OPS_RETRANS_CB.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
include/uapi/linux/bpf.h diff | blob | history
net/ipv4/tcp_output.c diff | blob | history
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