Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / um / drivers / daemon_kern.c

diff --git a/kernel/arch/um/drivers/daemon_kern.c b/kernel/arch/um/drivers/daemon_kern.c
new file mode 100644 (file)
index 0000000..7568cc2
--- /dev/null
+++ b/kernel/arch/um/drivers/daemon_kern.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ * Licensed under the GPL.
+ */
+
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <net_kern.h>
+#include "daemon.h"
+
+struct daemon_init {
+       char *sock_type;
+       char *ctl_sock;
+};
+
+static void daemon_init(struct net_device *dev, void *data)
+{
+       struct uml_net_private *pri;
+       struct daemon_data *dpri;
+       struct daemon_init *init = data;
+
+       pri = netdev_priv(dev);
+       dpri = (struct daemon_data *) pri->user;
+       dpri->sock_type = init->sock_type;
+       dpri->ctl_sock = init->ctl_sock;
+       dpri->fd = -1;
+       dpri->control = -1;
+       dpri->dev = dev;
+       /* We will free this pointer. If it contains crap we're burned. */
+       dpri->ctl_addr = NULL;
+       dpri->data_addr = NULL;
+       dpri->local_addr = NULL;
+
+       printk("daemon backend (uml_switch version %d) - %s:%s",
+              SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
+       printk("\n");
+}
+
+static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+       return net_recvfrom(fd, skb_mac_header(skb),
+                           skb->dev->mtu + ETH_HEADER_OTHER);
+}
+
+static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+       return daemon_user_write(fd, skb->data, skb->len,
+                                (struct daemon_data *) &lp->user);
+}
+
+static const struct net_kern_info daemon_kern_info = {
+       .init                   = daemon_init,
+       .protocol               = eth_protocol,
+       .read                   = daemon_read,
+       .write                  = daemon_write,
+};
+
+static int daemon_setup(char *str, char **mac_out, void *data)
+{
+       struct daemon_init *init = data;
+       char *remain;
+
+       *init = ((struct daemon_init)
+               { .sock_type            = "unix",
+                 .ctl_sock             = "/tmp/uml.ctl" });
+
+       remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
+                              NULL);
+       if (remain != NULL)
+               printk(KERN_WARNING "daemon_setup : Ignoring data socket "
+                      "specification\n");
+
+       return 1;
+}
+
+static struct transport daemon_transport = {
+       .list           = LIST_HEAD_INIT(daemon_transport.list),
+       .name           = "daemon",
+       .setup          = daemon_setup,
+       .user           = &daemon_user_info,
+       .kern           = &daemon_kern_info,
+       .private_size   = sizeof(struct daemon_data),
+       .setup_size     = sizeof(struct daemon_init),
+};
+
+static int register_daemon(void)
+{
+       register_transport(&daemon_transport);
+       return 0;
+}
+
+late_initcall(register_daemon);