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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2017-12-29 03:46:51 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-02 20:27:29 +0100 |
| commit | 103d750c88fe6b42dbe7abc4d204027f343ee125 (patch) | |
| tree | 6cc0c0413e16d6ae73f578f14ca3bff1e76e2e26 /net/sctp | |
| parent | net: tcp: Remove TCP probe module (diff) | |
| download | linux-103d750c88fe6b42dbe7abc4d204027f343ee125.tar.xz linux-103d750c88fe6b42dbe7abc4d204027f343ee125.zip | |
net: sctp: Add SCTP ACK tracking trace event
Add SCTP ACK tracking trace event to trace the changes of SCTP
association state in response to incoming packets.
It is used for debugging SCTP congestion control algorithms,
and will replace sctp_probe module.
Note that this event a bit tricky. Since this consists of 2
events (sctp_probe and sctp_probe_path) so you have to enable
both events as below.
# cd /sys/kernel/debug/tracing
# echo 1 > events/sctp/sctp_probe/enable
# echo 1 > events/sctp/sctp_probe_path/enable
Or, you can enable all the events under sctp.
# echo 1 > events/sctp/enable
Since sctp_probe_path event is always invoked from sctp_probe
event, you can not see any output if you only enable
sctp_probe_path.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 541f34735346..eb7905ffe5f2 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -59,6 +59,9 @@ #include <net/sctp/sm.h> #include <net/sctp/structs.h> +#define CREATE_TRACE_POINTS +#include <trace/events/sctp.h> + static struct sctp_packet *sctp_abort_pkt_new( struct net *net, const struct sctp_endpoint *ep, @@ -3219,6 +3222,8 @@ enum sctp_disposition sctp_sf_eat_sack_6_2(struct net *net, struct sctp_sackhdr *sackh; __u32 ctsn; + trace_sctp_probe(ep, asoc, chunk); + if (!sctp_vtag_verify(chunk, asoc)) return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands); |