net: add a limit parameter to sk_add_backlog()

sk_add_backlog() & sk_rcvqueues_full() hard coded sk_rcvbuf as the
memory limit. We need to make this limit a parameter for TCP use.

No functional change expected in this patch, all callers still using the
old sk_rcvbuf limit.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Cc: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index 80f71af71384..80564fe03024 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -342,7 +342,7 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
                 sctp_bh_lock_sock(sk);
 
                 if (sock_owned_by_user(sk)) {
-                        if (sk_add_backlog(sk, skb))
+                        if (sk_add_backlog(sk, skb, sk->sk_rcvbuf))
                                 sctp_chunk_free(chunk);
                         else
                                 backloged = 1;
@@ -376,7 +376,7 @@ static int sctp_add_backlog(struct sock *sk, struct sk_buff *skb)
         struct sctp_ep_common *rcvr = chunk->rcvr;
         int ret;
 
-        ret = sk_add_backlog(sk, skb);
+        ret = sk_add_backlog(sk, skb, sk->sk_rcvbuf);
         if (!ret) {
                 /* Hold the assoc/ep while hanging on the backlog queue.
                  * This way, we know structures we need will not disappear