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[TCP]: Report congestion control algorithm in tcp_diag. 

Enhancement to the tcp_diag interface used by the iproute2 ss command
to report the tcp congestion control being used by a socket.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2005-06-23 12:21:28 -07:00 committed by David S. Miller
parent 7c99c909fa
commit 056ede6cfa
2 changed files with 7 additions and 2 deletions
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4
include/linux/tcp_diag.h
View File

@ -99,9 +99,10 @@ enum
TCPDIAG_MEMINFO,
TCPDIAG_INFO,
TCPDIAG_VEGASINFO,
TCPDIAG_CONG,
};
#define TCPDIAG_MAX TCPDIAG_VEGASINFO
#define TCPDIAG_MAX TCPDIAG_CONG
/* TCPDIAG_MEM */
@ -123,5 +124,4 @@ struct tcpvegas_info {
__u32 tcpv_minrtt;
};
#endif /* _TCP_DIAG_H_ */

5
net/ipv4/tcp_diag.c
View File

@ -65,6 +65,11 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
if (ext & (1<<(TCPDIAG_INFO-1)))
info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
if (ext & (1<<(TCPDIAG_CONG-1))) {
size_t len = strlen(tp->ca_ops->name);
strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),
tp->ca_ops->name);
}
}
r->tcpdiag_family = sk->sk_family;
r->tcpdiag_state = sk->sk_state;