[SCTP]: Include ulpevents in socket receive buffer accounting.
Also introduces a sysctl option to configure the receive buffer
accounting policy to be either at socket or association level.
Default is all the associations on the same socket share the
receive buffer.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 5f07ddb..dec68a6 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -177,10 +177,10 @@
* RFC 6 - A SCTP receiver MUST be able to receive a minimum of
* 1500 bytes in one SCTP packet.
*/
- if (sk->sk_rcvbuf < SCTP_DEFAULT_MINWINDOW)
+ if ((sk->sk_rcvbuf/2) < SCTP_DEFAULT_MINWINDOW)
asoc->rwnd = SCTP_DEFAULT_MINWINDOW;
else
- asoc->rwnd = sk->sk_rcvbuf;
+ asoc->rwnd = sk->sk_rcvbuf/2;
asoc->a_rwnd = asoc->rwnd;
@@ -192,6 +192,9 @@
/* Set the sndbuf size for transmit. */
asoc->sndbuf_used = 0;
+ /* Initialize the receive memory counter */
+ atomic_set(&asoc->rmem_alloc, 0);
+
init_waitqueue_head(&asoc->wait);
asoc->c.my_vtag = sctp_generate_tag(ep);
@@ -400,6 +403,8 @@
spin_unlock_bh(&sctp_assocs_id_lock);
}
+ BUG_TRAP(!atomic_read(&asoc->rmem_alloc));
+
if (asoc->base.malloced) {
kfree(asoc);
SCTP_DBG_OBJCNT_DEC(assoc);