Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / rose / rose_dev.c

diff --git a/kernel/net/rose/rose_dev.c b/kernel/net/rose/rose_dev.c
new file mode 100644 (file)
index 0000000..369ca81
--- /dev/null
+++ b/kernel/net/rose/rose_dev.c
@@ -0,0 +1,144 @@
+/*
+ * 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/module.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/sysctl.h>
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/if_ether.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+
+#include <net/ip.h>
+#include <net/arp.h>
+
+#include <net/ax25.h>
+#include <net/rose.h>
+
+static int rose_header(struct sk_buff *skb, struct net_device *dev,
+                      unsigned short type,
+                      const void *daddr, const void *saddr, unsigned int len)
+{
+       unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
+
+       if (daddr)
+               memcpy(buff + 7, daddr, dev->addr_len);
+
+       *buff++ = ROSE_GFI | ROSE_Q_BIT;
+       *buff++ = 0x00;
+       *buff++ = ROSE_DATA;
+       *buff++ = 0x7F;
+       *buff++ = AX25_P_IP;
+
+       if (daddr != NULL)
+               return 37;
+
+       return -37;
+}
+
+static int rose_set_mac_address(struct net_device *dev, void *addr)
+{
+       struct sockaddr *sa = addr;
+       int err;
+
+       if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
+               return 0;
+
+       if (dev->flags & IFF_UP) {
+               err = rose_add_loopback_node((rose_address *)sa->sa_data);
+               if (err)
+                       return err;
+
+               rose_del_loopback_node((rose_address *)dev->dev_addr);
+       }
+
+       memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+
+       return 0;
+}
+
+static int rose_open(struct net_device *dev)
+{
+       int err;
+
+       err = rose_add_loopback_node((rose_address *)dev->dev_addr);
+       if (err)
+               return err;
+
+       netif_start_queue(dev);
+
+       return 0;
+}
+
+static int rose_close(struct net_device *dev)
+{
+       netif_stop_queue(dev);
+       rose_del_loopback_node((rose_address *)dev->dev_addr);
+       return 0;
+}
+
+static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+       struct net_device_stats *stats = &dev->stats;
+       unsigned int len = skb->len;
+
+       if (!netif_running(dev)) {
+               printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
+               return NETDEV_TX_BUSY;
+       }
+
+       if (!rose_route_frame(skb, NULL)) {
+               dev_kfree_skb(skb);
+               stats->tx_errors++;
+               return NETDEV_TX_OK;
+       }
+
+       stats->tx_packets++;
+       stats->tx_bytes += len;
+       return NETDEV_TX_OK;
+}
+
+static const struct header_ops rose_header_ops = {
+       .create = rose_header,
+};
+
+static const struct net_device_ops rose_netdev_ops = {
+       .ndo_open               = rose_open,
+       .ndo_stop               = rose_close,
+       .ndo_start_xmit         = rose_xmit,
+       .ndo_set_mac_address    = rose_set_mac_address,
+};
+
+void rose_setup(struct net_device *dev)
+{
+       dev->mtu                = ROSE_MAX_PACKET_SIZE - 2;
+       dev->netdev_ops         = &rose_netdev_ops;
+
+       dev->header_ops         = &rose_header_ops;
+       dev->hard_header_len    = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
+       dev->addr_len           = ROSE_ADDR_LEN;
+       dev->type               = ARPHRD_ROSE;
+
+       /* New-style flags. */
+       dev->flags              = IFF_NOARP;
+}