diff options
| -rw-r--r-- | net/dccp/dccp.h | 1 | ||||
| -rw-r--r-- | net/dccp/proto.c | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index 33d86f53138..3a94625a1af 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -87,6 +87,7 @@ extern int sysctl_dccp_feat_tx_ccid; extern int sysctl_dccp_feat_ack_ratio; extern int sysctl_dccp_feat_send_ack_vector; extern int sysctl_dccp_feat_send_ndp_count; +extern int sysctl_dccp_tx_qlen; /* is seq1 < seq2 ? */ static inline int before48(const u64 seq1, const u64 seq2) diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 0225bdacd3b..a7f345c8d0d 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -52,6 +52,9 @@ struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { EXPORT_SYMBOL_GPL(dccp_hashinfo); +/* the maximum queue length for tx in packets. 0 is no limit */ +int sysctl_dccp_tx_qlen __read_mostly = 5; + void dccp_set_state(struct sock *sk, const int state) { const int oldstate = sk->sk_state; @@ -645,6 +648,13 @@ int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, return -EMSGSIZE; lock_sock(sk); + + if (sysctl_dccp_tx_qlen && + (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) { + rc = -EAGAIN; + goto out_release; + } + timeo = sock_sndtimeo(sk, noblock); /* |