1 files changed, 23 insertions, 3 deletions

diff --git a/net/rxrpc/ar-ack.c b/net/rxrpc/ar-ack.c
index 1a490d976e7e..c6be17a959a6 100644
--- a/net/rxrpc/ar-ack.c
+++ b/net/rxrpc/ar-ack.c
@@ -43,6 +43,26 @@ unsigned rxrpc_soft_ack_delay = 1 * HZ;
  */
 unsigned rxrpc_idle_ack_delay = 0.5 * HZ;
 
+/*
+ * Receive window size in packets.  This indicates the maximum number of
+ * unconsumed received packets we're willing to retain in memory.  Once this
+ * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
+ * packets.
+ */
+unsigned rxrpc_rx_window_size = 32;
+
+/*
+ * Maximum Rx MTU size.  This indicates to the sender the size of jumbo packet
+ * made by gluing normal packets together that we're willing to handle.
+ */
+unsigned rxrpc_rx_mtu = 5692;
+
+/*
+ * The maximum number of fragments in a received jumbo packet that we tell the
+ * sender that we're willing to handle.
+ */
+unsigned rxrpc_rx_jumbo_max = 4;
+
 static const char *rxrpc_acks(u8 reason)
 {
         static const char *const str[] = {
@@ -1195,11 +1215,11 @@ send_ACK:
         mtu = call->conn->trans->peer->if_mtu;
         mtu -= call->conn->trans->peer->hdrsize;
         ackinfo.maxMTU  = htonl(mtu);
-        ackinfo.rwind   = htonl(32);
+        ackinfo.rwind   = htonl(rxrpc_rx_window_size);
 
         /* permit the peer to send us jumbo packets if it wants to */
-        ackinfo.rxMTU   = htonl(5692);
-        ackinfo.jumbo_max = htonl(4);
+        ackinfo.rxMTU   = htonl(rxrpc_rx_mtu);
+        ackinfo.jumbo_max = htonl(rxrpc_rx_jumbo_max);
 
         hdr.serial = htonl(atomic_inc_return(&call->conn->serial));
         _proto("Tx ACK %%%u { m=%hu f=#%u p=#%u s=%%%u r=%s n=%u }",