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, 221 insertions, 0 deletions

diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c
new file mode 100644
index 000000000000..6c5d37517035
--- /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);
+}