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, 449 insertions, 0 deletions

diff --git a/net/lapb/lapb_iface.c b/net/lapb/lapb_iface.c
new file mode 100644
index 000000000000..aea6616cea3d
--- /dev/null
+++ b/net/lapb/lapb_iface.c
@@ -0,0 +1,449 @@
+/*
+ *      LAPB release 002
+ *
+ *      This code REQUIRES 2.1.15 or higher/ NET3.038
+ *
+ *      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
+ *      LAPB 001        Jonathan Naylor Started Coding
+ *      LAPB 002        Jonathan Naylor New timer architecture.
+ *      2000-10-29      Henner Eisen    lapb_data_indication() return status.
+ */
+ 
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/if_arp.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>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <net/lapb.h>
+
+static struct list_head lapb_list = LIST_HEAD_INIT(lapb_list);
+static DEFINE_RWLOCK(lapb_list_lock);
+
+/*
+ *      Free an allocated lapb control block. 
+ */
+static void lapb_free_cb(struct lapb_cb *lapb)
+{
+        kfree(lapb);
+}
+
+static __inline__ void lapb_hold(struct lapb_cb *lapb)
+{
+        atomic_inc(&lapb->refcnt);
+}
+
+static __inline__ void lapb_put(struct lapb_cb *lapb)
+{
+        if (atomic_dec_and_test(&lapb->refcnt))
+                lapb_free_cb(lapb);
+}
+
+/*
+ *      Socket removal during an interrupt is now safe.
+ */
+static void __lapb_remove_cb(struct lapb_cb *lapb)
+{
+        if (lapb->node.next) {
+                list_del(&lapb->node);
+                lapb_put(lapb);
+        }
+}
+
+/*
+ *      Add a socket to the bound sockets list.
+ */
+static void __lapb_insert_cb(struct lapb_cb *lapb)
+{
+        list_add(&lapb->node, &lapb_list);
+        lapb_hold(lapb);
+}
+
+static struct lapb_cb *__lapb_devtostruct(struct net_device *dev)
+{
+        struct list_head *entry;
+        struct lapb_cb *lapb, *use = NULL;
+
+        list_for_each(entry, &lapb_list) {
+                lapb = list_entry(entry, struct lapb_cb, node);
+                if (lapb->dev == dev) {
+                        use = lapb;
+                        break;
+                }
+        }
+
+        if (use)
+                lapb_hold(use);
+
+        return use;
+}
+
+static struct lapb_cb *lapb_devtostruct(struct net_device *dev)
+{
+        struct lapb_cb *rc;
+
+        read_lock_bh(&lapb_list_lock);
+        rc = __lapb_devtostruct(dev);
+        read_unlock_bh(&lapb_list_lock);
+
+        return rc;
+}
+/*
+ *      Create an empty LAPB control block.
+ */
+static struct lapb_cb *lapb_create_cb(void)
+{
+        struct lapb_cb *lapb = kmalloc(sizeof(*lapb), GFP_ATOMIC);
+
+
+        if (!lapb)
+                goto out;
+
+        memset(lapb, 0x00, sizeof(*lapb));
+
+        skb_queue_head_init(&lapb->write_queue);
+        skb_queue_head_init(&lapb->ack_queue);
+
+        init_timer(&lapb->t1timer);
+        init_timer(&lapb->t2timer);
+
+        lapb->t1      = LAPB_DEFAULT_T1;
+        lapb->t2      = LAPB_DEFAULT_T2;
+        lapb->n2      = LAPB_DEFAULT_N2;
+        lapb->mode    = LAPB_DEFAULT_MODE;
+        lapb->window  = LAPB_DEFAULT_WINDOW;
+        lapb->state   = LAPB_STATE_0;
+        atomic_set(&lapb->refcnt, 1);
+out:
+        return lapb;
+}
+
+int lapb_register(struct net_device *dev, struct lapb_register_struct *callbacks)
+{
+        struct lapb_cb *lapb;
+        int rc = LAPB_BADTOKEN;
+
+        write_lock_bh(&lapb_list_lock);
+
+        lapb = __lapb_devtostruct(dev);
+        if (lapb) {
+                lapb_put(lapb);
+                goto out;
+        }
+
+        lapb = lapb_create_cb();
+        rc = LAPB_NOMEM;
+        if (!lapb)
+                goto out;
+
+        lapb->dev       = dev;
+        lapb->callbacks = *callbacks;
+
+        __lapb_insert_cb(lapb);
+
+        lapb_start_t1timer(lapb);
+
+        rc = LAPB_OK;
+out:
+        write_unlock_bh(&lapb_list_lock);
+        return rc;
+}
+
+int lapb_unregister(struct net_device *dev)
+{
+        struct lapb_cb *lapb;
+        int rc = LAPB_BADTOKEN;
+
+        write_lock_bh(&lapb_list_lock);
+        lapb = __lapb_devtostruct(dev);
+        if (!lapb)
+                goto out;
+
+        lapb_stop_t1timer(lapb);
+        lapb_stop_t2timer(lapb);
+
+        lapb_clear_queues(lapb);
+
+        __lapb_remove_cb(lapb);
+
+        lapb_put(lapb);
+        rc = LAPB_OK;
+out:
+        write_unlock_bh(&lapb_list_lock);
+        return rc;
+}
+
+int lapb_getparms(struct net_device *dev, struct lapb_parms_struct *parms)
+{
+        int rc = LAPB_BADTOKEN;
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+
+        if (!lapb)
+                goto out;
+
+        parms->t1      = lapb->t1 / HZ;
+        parms->t2      = lapb->t2 / HZ;
+        parms->n2      = lapb->n2;
+        parms->n2count = lapb->n2count;
+        parms->state   = lapb->state;
+        parms->window  = lapb->window;
+        parms->mode    = lapb->mode;
+
+        if (!timer_pending(&lapb->t1timer))
+                parms->t1timer = 0;
+        else
+                parms->t1timer = (lapb->t1timer.expires - jiffies) / HZ;
+
+        if (!timer_pending(&lapb->t2timer))
+                parms->t2timer = 0;
+        else
+                parms->t2timer = (lapb->t2timer.expires - jiffies) / HZ;
+
+        lapb_put(lapb);
+        rc = LAPB_OK;
+out:
+        return rc;
+}
+
+int lapb_setparms(struct net_device *dev, struct lapb_parms_struct *parms)
+{
+        int rc = LAPB_BADTOKEN;
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+
+        if (!lapb)
+                goto out;
+
+        rc = LAPB_INVALUE;
+        if (parms->t1 < 1 || parms->t2 < 1 || parms->n2 < 1)
+                goto out_put;
+
+        if (lapb->state == LAPB_STATE_0) {
+                if (((parms->mode & LAPB_EXTENDED) &&
+                     (parms->window < 1 || parms->window > 127)) ||
+                    (parms->window < 1 || parms->window > 7))
+                        goto out_put;
+
+                lapb->mode    = parms->mode;
+                lapb->window  = parms->window;
+        }
+
+        lapb->t1    = parms->t1 * HZ;
+        lapb->t2    = parms->t2 * HZ;
+        lapb->n2    = parms->n2;
+
+        rc = LAPB_OK;
+out_put:
+        lapb_put(lapb);
+out:
+        return rc;
+}
+
+int lapb_connect_request(struct net_device *dev)
+{
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+        int rc = LAPB_BADTOKEN;
+
+        if (!lapb)
+                goto out;
+
+        rc = LAPB_OK;
+        if (lapb->state == LAPB_STATE_1)
+                goto out_put;
+
+        rc = LAPB_CONNECTED;
+        if (lapb->state == LAPB_STATE_3 || lapb->state == LAPB_STATE_4)
+                goto out_put;
+
+        lapb_establish_data_link(lapb);
+
+#if LAPB_DEBUG > 0
+        printk(KERN_DEBUG "lapb: (%p) S0 -> S1\n", lapb->dev);
+#endif
+        lapb->state = LAPB_STATE_1;
+
+        rc = LAPB_OK;
+out_put:
+        lapb_put(lapb);
+out:
+        return rc;
+}
+
+int lapb_disconnect_request(struct net_device *dev)
+{
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+        int rc = LAPB_BADTOKEN;
+
+        if (!lapb)
+                goto out;
+
+        switch (lapb->state) {
+                case LAPB_STATE_0:
+                        rc = LAPB_NOTCONNECTED;
+                        goto out_put;
+
+                case LAPB_STATE_1:
+#if LAPB_DEBUG > 1
+                        printk(KERN_DEBUG "lapb: (%p) S1 TX DISC(1)\n", lapb->dev);
+#endif
+#if LAPB_DEBUG > 0
+                        printk(KERN_DEBUG "lapb: (%p) S1 -> S0\n", lapb->dev);
+#endif
+                        lapb_send_control(lapb, LAPB_DISC, LAPB_POLLON, LAPB_COMMAND);
+                        lapb->state = LAPB_STATE_0;
+                        lapb_start_t1timer(lapb);
+                        rc = LAPB_NOTCONNECTED;
+                        goto out_put;
+
+                case LAPB_STATE_2:
+                        rc = LAPB_OK;
+                        goto out_put;
+        }
+
+        lapb_clear_queues(lapb);
+        lapb->n2count = 0;
+        lapb_send_control(lapb, LAPB_DISC, LAPB_POLLON, LAPB_COMMAND);
+        lapb_start_t1timer(lapb);
+        lapb_stop_t2timer(lapb);
+        lapb->state = LAPB_STATE_2;
+
+#if LAPB_DEBUG > 1
+        printk(KERN_DEBUG "lapb: (%p) S3 DISC(1)\n", lapb->dev);
+#endif
+#if LAPB_DEBUG > 0
+        printk(KERN_DEBUG "lapb: (%p) S3 -> S2\n", lapb->dev);
+#endif
+
+        rc = LAPB_OK;
+out_put:
+        lapb_put(lapb);
+out:
+        return rc;
+}
+
+int lapb_data_request(struct net_device *dev, struct sk_buff *skb)
+{
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+        int rc = LAPB_BADTOKEN;
+
+        if (!lapb)
+                goto out;
+
+        rc = LAPB_NOTCONNECTED;
+        if (lapb->state != LAPB_STATE_3 && lapb->state != LAPB_STATE_4)
+                goto out_put;
+
+        skb_queue_tail(&lapb->write_queue, skb);
+        lapb_kick(lapb);
+        rc = LAPB_OK;
+out_put:
+        lapb_put(lapb);
+out:
+        return rc;
+}
+
+int lapb_data_received(struct net_device *dev, struct sk_buff *skb)
+{
+        struct lapb_cb *lapb = lapb_devtostruct(dev);
+        int rc = LAPB_BADTOKEN;
+
+        if (lapb) {
+                lapb_data_input(lapb, skb);
+                lapb_put(lapb);
+                rc = LAPB_OK;
+        }
+
+        return rc;
+}
+
+void lapb_connect_confirmation(struct lapb_cb *lapb, int reason)
+{
+        if (lapb->callbacks.connect_confirmation)
+                lapb->callbacks.connect_confirmation(lapb->dev, reason);
+}
+
+void lapb_connect_indication(struct lapb_cb *lapb, int reason)
+{
+        if (lapb->callbacks.connect_indication)
+                lapb->callbacks.connect_indication(lapb->dev, reason);
+}
+
+void lapb_disconnect_confirmation(struct lapb_cb *lapb, int reason)
+{
+        if (lapb->callbacks.disconnect_confirmation)
+                lapb->callbacks.disconnect_confirmation(lapb->dev, reason);
+}
+
+void lapb_disconnect_indication(struct lapb_cb *lapb, int reason)
+{
+        if (lapb->callbacks.disconnect_indication)
+                lapb->callbacks.disconnect_indication(lapb->dev, reason);
+}
+
+int lapb_data_indication(struct lapb_cb *lapb, struct sk_buff *skb)
+{
+        if (lapb->callbacks.data_indication)
+                return lapb->callbacks.data_indication(lapb->dev, skb);
+
+        kfree_skb(skb);
+        return NET_RX_CN_HIGH; /* For now; must be != NET_RX_DROP */ 
+}
+
+int lapb_data_transmit(struct lapb_cb *lapb, struct sk_buff *skb)
+{
+        int used = 0;
+
+        if (lapb->callbacks.data_transmit) {
+                lapb->callbacks.data_transmit(lapb->dev, skb);
+                used = 1;
+        }
+
+        return used;
+}
+
+EXPORT_SYMBOL(lapb_register);
+EXPORT_SYMBOL(lapb_unregister);
+EXPORT_SYMBOL(lapb_getparms);
+EXPORT_SYMBOL(lapb_setparms);
+EXPORT_SYMBOL(lapb_connect_request);
+EXPORT_SYMBOL(lapb_disconnect_request);
+EXPORT_SYMBOL(lapb_data_request);
+EXPORT_SYMBOL(lapb_data_received);
+
+static int __init lapb_init(void)
+{
+        return 0;
+}
+
+static void __exit lapb_exit(void)
+{
+        WARN_ON(!list_empty(&lapb_list));
+}
+
+MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
+MODULE_DESCRIPTION("The X.25 Link Access Procedure B link layer protocol");
+MODULE_LICENSE("GPL");
+
+module_init(lapb_init);
+module_exit(lapb_exit);