Linux-2.6.12-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!
diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c
new file mode 100644
index 0000000..6c5d375
--- /dev/null
+++ b/net/x25/x25_route.c
@@ -0,0 +1,221 @@
+/*
+ * X.25 Packet Layer release 002
+ *
+ * This is ALPHA test software. This code may break your machine,
+ * randomly fail to work with new releases, misbehave and/or generally
+ * screw up. It might even work.
+ *
+ * This code REQUIRES 2.1.15 or higher
+ *
+ * This module:
+ * This module 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.
+ *
+ * History
+ * X.25 001 Jonathan Naylor Started coding.
+ */
+
+#include <linux/config.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <net/x25.h>
+
+struct list_head x25_route_list = LIST_HEAD_INIT(x25_route_list);
+DEFINE_RWLOCK(x25_route_list_lock);
+
+/*
+ * Add a new route.
+ */
+static int x25_add_route(struct x25_address *address, unsigned int sigdigits,
+ struct net_device *dev)
+{
+ struct x25_route *rt;
+ struct list_head *entry;
+ int rc = -EINVAL;
+
+ write_lock_bh(&x25_route_list_lock);
+
+ list_for_each(entry, &x25_route_list) {
+ rt = list_entry(entry, struct x25_route, node);
+
+ if (!memcmp(&rt->address, address, sigdigits) &&
+ rt->sigdigits == sigdigits)
+ goto out;
+ }
+
+ rt = kmalloc(sizeof(*rt), GFP_ATOMIC);
+ rc = -ENOMEM;
+ if (!rt)
+ goto out;
+
+ strcpy(rt->address.x25_addr, "000000000000000");
+ memcpy(rt->address.x25_addr, address->x25_addr, sigdigits);
+
+ rt->sigdigits = sigdigits;
+ rt->dev = dev;
+ atomic_set(&rt->refcnt, 1);
+
+ list_add(&rt->node, &x25_route_list);
+ rc = 0;
+out:
+ write_unlock_bh(&x25_route_list_lock);
+ return rc;
+}
+
+/**
+ * __x25_remove_route - remove route from x25_route_list
+ * @rt - route to remove
+ *
+ * Remove route from x25_route_list. If it was there.
+ * Caller must hold x25_route_list_lock.
+ */
+static void __x25_remove_route(struct x25_route *rt)
+{
+ if (rt->node.next) {
+ list_del(&rt->node);
+ x25_route_put(rt);
+ }
+}
+
+static int x25_del_route(struct x25_address *address, unsigned int sigdigits,
+ struct net_device *dev)
+{
+ struct x25_route *rt;
+ struct list_head *entry;
+ int rc = -EINVAL;
+
+ write_lock_bh(&x25_route_list_lock);
+
+ list_for_each(entry, &x25_route_list) {
+ rt = list_entry(entry, struct x25_route, node);
+
+ if (!memcmp(&rt->address, address, sigdigits) &&
+ rt->sigdigits == sigdigits && rt->dev == dev) {
+ __x25_remove_route(rt);
+ rc = 0;
+ break;
+ }
+ }
+
+ write_unlock_bh(&x25_route_list_lock);
+ return rc;
+}
+
+/*
+ * A device has been removed, remove its routes.
+ */
+void x25_route_device_down(struct net_device *dev)
+{
+ struct x25_route *rt;
+ struct list_head *entry, *tmp;
+
+ write_lock_bh(&x25_route_list_lock);
+
+ list_for_each_safe(entry, tmp, &x25_route_list) {
+ rt = list_entry(entry, struct x25_route, node);
+
+ if (rt->dev == dev)
+ __x25_remove_route(rt);
+ }
+ write_unlock_bh(&x25_route_list_lock);
+}
+
+/*
+ * Check that the device given is a valid X.25 interface that is "up".
+ */
+struct net_device *x25_dev_get(char *devname)
+{
+ struct net_device *dev = dev_get_by_name(devname);
+
+ if (dev &&
+ (!(dev->flags & IFF_UP) || (dev->type != ARPHRD_X25
+#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
+ && dev->type != ARPHRD_ETHER
+#endif
+ )))
+ dev_put(dev);
+
+ return dev;
+}
+
+/**
+ * x25_get_route - Find a route given an X.25 address.
+ * @addr - address to find a route for
+ *
+ * Find a route given an X.25 address.
+ */
+struct x25_route *x25_get_route(struct x25_address *addr)
+{
+ struct x25_route *rt, *use = NULL;
+ struct list_head *entry;
+
+ read_lock_bh(&x25_route_list_lock);
+
+ list_for_each(entry, &x25_route_list) {
+ rt = list_entry(entry, struct x25_route, node);
+
+ if (!memcmp(&rt->address, addr, rt->sigdigits)) {
+ if (!use)
+ use = rt;
+ else if (rt->sigdigits > use->sigdigits)
+ use = rt;
+ }
+ }
+
+ if (use)
+ x25_route_hold(use);
+
+ read_unlock_bh(&x25_route_list_lock);
+ return use;
+}
+
+/*
+ * Handle the ioctls that control the routing functions.
+ */
+int x25_route_ioctl(unsigned int cmd, void __user *arg)
+{
+ struct x25_route_struct rt;
+ struct net_device *dev;
+ int rc = -EINVAL;
+
+ if (cmd != SIOCADDRT && cmd != SIOCDELRT)
+ goto out;
+
+ rc = -EFAULT;
+ if (copy_from_user(&rt, arg, sizeof(rt)))
+ goto out;
+
+ rc = -EINVAL;
+ if (rt.sigdigits < 0 || rt.sigdigits > 15)
+ goto out;
+
+ dev = x25_dev_get(rt.device);
+ if (!dev)
+ goto out;
+
+ if (cmd == SIOCADDRT)
+ rc = x25_add_route(&rt.address, rt.sigdigits, dev);
+ else
+ rc = x25_del_route(&rt.address, rt.sigdigits, dev);
+ dev_put(dev);
+out:
+ return rc;
+}
+
+/*
+ * Release all memory associated with X.25 routing structures.
+ */
+void __exit x25_route_free(void)
+{
+ struct x25_route *rt;
+ struct list_head *entry, *tmp;
+
+ write_lock_bh(&x25_route_list_lock);
+ list_for_each_safe(entry, tmp, &x25_route_list) {
+ rt = list_entry(entry, struct x25_route, node);
+ __x25_remove_route(rt);
+ }
+ write_unlock_bh(&x25_route_list_lock);
+}