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-rw-r--r--net/rxrpc/ar-ack.c26
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 }",