Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 126 insertions, 0 deletions

diff --git a/net/rose/rose_out.c b/net/rose/rose_out.c
new file mode 100644
index 000000000000..2965ffc83b9b
--- /dev/null
+++ b/net/rose/rose_out.c
@@ -0,0 +1,126 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <net/rose.h>
+
+/*
+ *      This procedure is passed a buffer descriptor for an iframe. It builds
+ *      the rest of the control part of the frame and then writes it out.
+ */
+static void rose_send_iframe(struct sock *sk, struct sk_buff *skb)
+{
+        struct rose_sock *rose = rose_sk(sk);
+
+        if (skb == NULL)
+                return;
+
+        skb->data[2] |= (rose->vr << 5) & 0xE0;
+        skb->data[2] |= (rose->vs << 1) & 0x0E;
+
+        rose_start_idletimer(sk);
+
+        rose_transmit_link(skb, rose->neighbour);
+}
+
+void rose_kick(struct sock *sk)
+{
+        struct rose_sock *rose = rose_sk(sk);
+        struct sk_buff *skb, *skbn;
+        unsigned short start, end;
+
+        if (rose->state != ROSE_STATE_3)
+                return;
+
+        if (rose->condition & ROSE_COND_PEER_RX_BUSY)
+                return;
+
+        if (!skb_peek(&sk->sk_write_queue))
+                return;
+
+        start = (skb_peek(&rose->ack_queue) == NULL) ? rose->va : rose->vs;
+        end   = (rose->va + sysctl_rose_window_size) % ROSE_MODULUS;
+
+        if (start == end)
+                return;
+
+        rose->vs = start;
+
+        /*
+         * Transmit data until either we're out of data to send or
+         * the window is full.
+         */
+
+        skb  = skb_dequeue(&sk->sk_write_queue);
+
+        do {
+                if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
+                        skb_queue_head(&sk->sk_write_queue, skb);
+                        break;
+                }
+
+                skb_set_owner_w(skbn, sk);
+
+                /*
+                 * Transmit the frame copy.
+                 */
+                rose_send_iframe(sk, skbn);
+
+                rose->vs = (rose->vs + 1) % ROSE_MODULUS;
+
+                /*
+                 * Requeue the original data frame.
+                 */
+                skb_queue_tail(&rose->ack_queue, skb);
+
+        } while (rose->vs != end &&
+                 (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
+
+        rose->vl         = rose->vr;
+        rose->condition &= ~ROSE_COND_ACK_PENDING;
+
+        rose_stop_timer(sk);
+}
+
+/*
+ * The following routines are taken from page 170 of the 7th ARRL Computer
+ * Networking Conference paper, as is the whole state machine.
+ */
+
+void rose_enquiry_response(struct sock *sk)
+{
+        struct rose_sock *rose = rose_sk(sk);
+
+        if (rose->condition & ROSE_COND_OWN_RX_BUSY)
+                rose_write_internal(sk, ROSE_RNR);
+        else
+                rose_write_internal(sk, ROSE_RR);
+
+        rose->vl         = rose->vr;
+        rose->condition &= ~ROSE_COND_ACK_PENDING;
+
+        rose_stop_timer(sk);
+}