diff options
| author |   Ping Gan <jacky_gam_2001@163.com> | 2022-04-06 09:09:56 +0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-04-07 20:33:15 -0700 |
| commit | 15fcdf6ae116d1e8da4ff76c6fd82514f5ea501b (patch) | |
| tree | 709ac2a8ddf746f2b21324869f87844b9b4e205f /net/ipv4/tcp_cong.c | |
| parent | net-core: rx_otherhost_dropped to core_stats (diff) | |
| download | linux-dev-15fcdf6ae116d1e8da4ff76c6fd82514f5ea501b.tar.xz linux-dev-15fcdf6ae116d1e8da4ff76c6fd82514f5ea501b.zip | |
tcp: Add tracepoint for tcp_set_ca_state
The congestion status of a tcp flow may be updated since there
is congestion between tcp sender and receiver. It makes sense to
add tracepoint for congestion status set function to summate cc
status duration and evaluate the performance of network
and congestion algorithm. the backgound of this patch is below.
Link: https://github.com/iovisor/bcc/pull/3899
Signed-off-by: Ping Gan <jacky_gam_2001@163.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220406010956.19656-1-jacky_gam_2001@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_cong.c')
| -rw-r--r-- | net/ipv4/tcp_cong.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index d854bcfb9906..d3cae40749e8 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -16,6 +16,7 @@ #include <linux/gfp.h> #include <linux/jhash.h> #include <net/tcp.h> +#include <trace/events/tcp.h> static DEFINE_SPINLOCK(tcp_cong_list_lock); static LIST_HEAD(tcp_cong_list); @@ -33,6 +34,17 @@ struct tcp_congestion_ops *tcp_ca_find(const char *name) return NULL; } +void tcp_set_ca_state(struct sock *sk, const u8 ca_state) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + + trace_tcp_cong_state_set(sk, ca_state); + + if (icsk->icsk_ca_ops->set_state) + icsk->icsk_ca_ops->set_state(sk, ca_state); + icsk->icsk_ca_state = ca_state; +} + /* Must be called with rcu lock held */ static struct tcp_congestion_ops *tcp_ca_find_autoload(struct net *net, const char *name) |