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, 266 insertions, 0 deletions

diff --git a/net/ax25/ax25_iface.c b/net/ax25/ax25_iface.c
new file mode 100644
index 0000000..d68aff1
--- /dev/null
+++ b/net/ax25/ax25_iface.c
@@ -0,0 +1,266 @@
+/*
+ * 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/config.h>
+#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/spinlock.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/uaccess.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+
+static struct protocol_struct {
+	struct protocol_struct *next;
+	unsigned int pid;
+	int (*func)(struct sk_buff *, ax25_cb *);
+} *protocol_list = NULL;
+static DEFINE_RWLOCK(protocol_list_lock);
+
+static struct linkfail_struct {
+	struct linkfail_struct *next;
+	void (*func)(ax25_cb *, int);
+} *linkfail_list = NULL;
+static DEFINE_SPINLOCK(linkfail_lock);
+
+static struct listen_struct {
+	struct listen_struct *next;
+	ax25_address  callsign;
+	struct net_device *dev;
+} *listen_list = NULL;
+static DEFINE_SPINLOCK(listen_lock);
+
+int ax25_protocol_register(unsigned int pid,
+	int (*func)(struct sk_buff *, ax25_cb *))
+{
+	struct protocol_struct *protocol;
+
+	if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
+		return 0;
+#ifdef CONFIG_INET
+	if (pid == AX25_P_IP || pid == AX25_P_ARP)
+		return 0;
+#endif
+	if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	protocol->pid  = pid;
+	protocol->func = func;
+
+	write_lock(&protocol_list_lock);
+	protocol->next = protocol_list;
+	protocol_list  = protocol;
+	write_unlock(&protocol_list_lock);
+
+	return 1;
+}
+
+void ax25_protocol_release(unsigned int pid)
+{
+	struct protocol_struct *s, *protocol;
+
+	write_lock(&protocol_list_lock);
+	protocol = protocol_list;
+	if (protocol == NULL) {
+		write_unlock(&protocol_list_lock);
+		return;
+	}
+
+	if (protocol->pid == pid) {
+		protocol_list = protocol->next;
+		write_unlock(&protocol_list_lock);
+		kfree(protocol);
+		return;
+	}
+
+	while (protocol != NULL && protocol->next != NULL) {
+		if (protocol->next->pid == pid) {
+			s = protocol->next;
+			protocol->next = protocol->next->next;
+			write_unlock(&protocol_list_lock);
+			kfree(s);
+			return;
+		}
+
+		protocol = protocol->next;
+	}
+	write_unlock(&protocol_list_lock);
+}
+
+int ax25_linkfail_register(void (*func)(ax25_cb *, int))
+{
+	struct linkfail_struct *linkfail;
+
+	if ((linkfail = kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	linkfail->func = func;
+
+	spin_lock_bh(&linkfail_lock);
+	linkfail->next = linkfail_list;
+	linkfail_list  = linkfail;
+	spin_unlock_bh(&linkfail_lock);
+
+	return 1;
+}
+
+void ax25_linkfail_release(void (*func)(ax25_cb *, int))
+{
+	struct linkfail_struct *s, *linkfail;
+
+	spin_lock_bh(&linkfail_lock);
+	linkfail = linkfail_list;
+	if (linkfail == NULL) {
+		spin_unlock_bh(&linkfail_lock);
+		return;
+	}
+
+	if (linkfail->func == func) {
+		linkfail_list = linkfail->next;
+		spin_unlock_bh(&linkfail_lock);
+		kfree(linkfail);
+		return;
+	}
+
+	while (linkfail != NULL && linkfail->next != NULL) {
+		if (linkfail->next->func == func) {
+			s = linkfail->next;
+			linkfail->next = linkfail->next->next;
+			spin_unlock_bh(&linkfail_lock);
+			kfree(s);
+			return;
+		}
+
+		linkfail = linkfail->next;
+	}
+	spin_unlock_bh(&linkfail_lock);
+}
+
+int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
+{
+	struct listen_struct *listen;
+
+	if (ax25_listen_mine(callsign, dev))
+		return 0;
+
+	if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
+		return 0;
+
+	listen->callsign = *callsign;
+	listen->dev      = dev;
+
+	spin_lock_bh(&listen_lock);
+	listen->next = listen_list;
+	listen_list  = listen;
+	spin_unlock_bh(&listen_lock);
+
+	return 1;
+}
+
+void ax25_listen_release(ax25_address *callsign, struct net_device *dev)
+{
+	struct listen_struct *s, *listen;
+
+	spin_lock_bh(&listen_lock);
+	listen = listen_list;
+	if (listen == NULL) {
+		spin_unlock_bh(&listen_lock);
+		return;
+	}
+
+	if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
+		listen_list = listen->next;
+		spin_unlock_bh(&listen_lock);
+		kfree(listen);
+		return;
+	}
+
+	while (listen != NULL && listen->next != NULL) {
+		if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
+			s = listen->next;
+			listen->next = listen->next->next;
+			spin_unlock_bh(&listen_lock);
+			kfree(s);
+			return;
+		}
+
+		listen = listen->next;
+	}
+	spin_unlock_bh(&listen_lock);
+}
+
+int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
+{
+	int (*res)(struct sk_buff *, ax25_cb *) = NULL;
+	struct protocol_struct *protocol;
+
+	read_lock(&protocol_list_lock);
+	for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
+		if (protocol->pid == pid) {
+			res = protocol->func;
+			break;
+		}
+	read_unlock(&protocol_list_lock);
+
+	return res;
+}
+
+int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
+{
+	struct listen_struct *listen;
+
+	spin_lock_bh(&listen_lock);
+	for (listen = listen_list; listen != NULL; listen = listen->next)
+		if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL)) {
+			spin_unlock_bh(&listen_lock);
+			return 1;
+	}
+	spin_unlock_bh(&listen_lock);
+
+	return 0;
+}
+
+void ax25_link_failed(ax25_cb *ax25, int reason)
+{
+	struct linkfail_struct *linkfail;
+
+	spin_lock_bh(&linkfail_lock);
+	for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next)
+		(linkfail->func)(ax25, reason);
+	spin_unlock_bh(&linkfail_lock);
+}
+
+int ax25_protocol_is_registered(unsigned int pid)
+{
+	struct protocol_struct *protocol;
+	int res = 0;
+
+	read_lock(&protocol_list_lock);
+	for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
+		if (protocol->pid == pid) {
+			res = 1;
+			break;
+		}
+	read_unlock(&protocol_list_lock);
+
+	return res;
+}