Changes from v1: Fix build error (with ipv6 as ko) by adding EXPORT_TRACEPOINT_SYMBOL_GPL for trace_tcp_send_reset.
These patches add the following tracepoints to tcp stack. tcp_send_reset tcp_receive_reset tcp_destroy_sock tcp_set_state These tracepoints can be used to track TCP state changes. Such state changes include but are not limited to: connection establish, connection termination, tx and rx of RST, various retransmits. Currently, we use the following kprobes to trace these events: int kprobe__tcp_validate_incoming int kprobe__tcp_send_active_reset int kprobe__tcp_v4_send_reset int kprobe__tcp_v6_send_reset int kprobe__tcp_v4_destroy_sock int kprobe__tcp_set_state int kprobe__tcp_retransmit_skb These tracepoints will help us simplify this work. Thanks, Song Song Liu (6): tcp: add trace event class tcp_event_sk_skb tcp: mark trace event arguments sk and skb as const tcp: add tracepoint trace_tcp_send_reset tcp: add tracepoint trace_tcp_receive_reset tcp: add tracepoint trace_tcp_destroy_sock tcp: add tracepoint trace_tcp_set_state() include/trace/events/tcp.h | 181 ++++++++++++++++++++++++++++++++++++++++++++- net/core/net-traces.c | 2 + net/ipv4/tcp.c | 4 + net/ipv4/tcp_input.c | 3 + net/ipv4/tcp_ipv4.c | 8 +- net/ipv4/tcp_output.c | 5 ++ net/ipv6/tcp_ipv6.c | 10 ++- 7 files changed, 206 insertions(+), 7 deletions(-) -- 2.9.5
