This puts a limit on transmit queue length and sends back EAGAIN if the
buffer is full.
Signed-off-by: Ian McDonald <ian.mcdonald@xxxxxxxxxxx>
---
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index b9d6e7e..4056308 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -634,6 +634,14 @@ int dccp_sendmsg(struct kiocb *iocb, str
return -EMSGSIZE;
lock_sock(sk);
+
+ if (sysctl_dccp_tx_qlen &&
+ (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) {
+ /* if sysctl_dccp_tx_qlen == 0 then unlimited tx queue */
+ rc = -EAGAIN;
+ goto out_release;
+ }
+
timeo = sock_sndtimeo(sk, noblock);
/*
-
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