1 files changed, 89 insertions, 0 deletions

diff --git a/net/rxrpc/misc.c b/net/rxrpc/misc.c
new file mode 100644
index 000000000000..1afe9876e79f
--- /dev/null
+++ b/net/rxrpc/misc.c
@@ -0,0 +1,89 @@
+/* Miscellaneous bits
+ *
+ * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+/*
+ * How long to wait before scheduling ACK generation after seeing a
+ * packet with RXRPC_REQUEST_ACK set (in jiffies).
+ */
+unsigned int rxrpc_requested_ack_delay = 1;
+
+/*
+ * How long to wait before scheduling an ACK with subtype DELAY (in jiffies).
+ *
+ * We use this when we've received new data packets.  If those packets aren't
+ * all consumed within this time we will send a DELAY ACK if an ACK was not
+ * requested to let the sender know it doesn't need to resend.
+ */
+unsigned int rxrpc_soft_ack_delay = 1 * HZ;
+
+/*
+ * How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
+ *
+ * We use this when we've consumed some previously soft-ACK'd packets when
+ * further packets aren't immediately received to decide when to send an IDLE
+ * ACK let the other end know that it can free up its Tx buffer space.
+ */
+unsigned int 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 int 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 int 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 int rxrpc_rx_jumbo_max = 4;
+
+const char *const rxrpc_pkts[] = {
+        "?00",
+        "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG",
+        "?09", "?10", "?11", "?12", "VERSION", "?14", "?15"
+};
+
+const s8 rxrpc_ack_priority[] = {
+        [0]                             = 0,
+        [RXRPC_ACK_DELAY]               = 1,
+        [RXRPC_ACK_REQUESTED]           = 2,
+        [RXRPC_ACK_IDLE]                = 3,
+        [RXRPC_ACK_PING_RESPONSE]       = 4,
+        [RXRPC_ACK_DUPLICATE]           = 5,
+        [RXRPC_ACK_OUT_OF_SEQUENCE]     = 6,
+        [RXRPC_ACK_EXCEEDS_WINDOW]      = 7,
+        [RXRPC_ACK_NOSPACE]             = 8,
+};
+
+const char *rxrpc_acks(u8 reason)
+{
+        static const char *const str[] = {
+                "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
+                "IDL", "-?-"
+        };
+
+        if (reason >= ARRAY_SIZE(str))
+                reason = ARRAY_SIZE(str) - 1;
+        return str[reason];
+}