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-rw-r--r--arch/um/drivers/vde_kern.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/um/drivers/vde_kern.c b/arch/um/drivers/vde_kern.c
new file mode 100644
index 000000000..bc6f22cbf
--- /dev/null
+++ b/arch/um/drivers/vde_kern.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
+ *
+ * Transport usage:
+ * ethN=vde,<vde_switch>,<mac addr>,<port>,<group>,<mode>,<description>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <net_kern.h>
+#include <net_user.h>
+#include "vde.h"
+
+static void vde_init(struct net_device *dev, void *data)
+{
+ struct vde_init *init = data;
+ struct uml_net_private *pri;
+ struct vde_data *vpri;
+
+ pri = netdev_priv(dev);
+ vpri = (struct vde_data *) pri->user;
+
+ vpri->vde_switch = init->vde_switch;
+ vpri->descr = init->descr ? init->descr : "UML vde_transport";
+ vpri->args = NULL;
+ vpri->conn = NULL;
+ vpri->dev = dev;
+
+ printk("vde backend - %s, ", vpri->vde_switch ?
+ vpri->vde_switch : "(default socket)");
+
+ vde_init_libstuff(vpri, init);
+
+ printk("\n");
+}
+
+static int vde_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ struct vde_data *pri = (struct vde_data *) &lp->user;
+
+ if (pri->conn != NULL)
+ return vde_user_read(pri->conn, skb_mac_header(skb),
+ skb->dev->mtu + ETH_HEADER_OTHER);
+
+ printk(KERN_ERR "vde_read - we have no VDECONN to read from");
+ return -EBADF;
+}
+
+static int vde_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ struct vde_data *pri = (struct vde_data *) &lp->user;
+
+ if (pri->conn != NULL)
+ return vde_user_write((void *)pri->conn, skb->data,
+ skb->len);
+
+ printk(KERN_ERR "vde_write - we have no VDECONN to write to");
+ return -EBADF;
+}
+
+static const struct net_kern_info vde_kern_info = {
+ .init = vde_init,
+ .protocol = eth_protocol,
+ .read = vde_read,
+ .write = vde_write,
+};
+
+static int vde_setup(char *str, char **mac_out, void *data)
+{
+ struct vde_init *init = data;
+ char *remain, *port_str = NULL, *mode_str = NULL, *last;
+
+ *init = ((struct vde_init)
+ { .vde_switch = NULL,
+ .descr = NULL,
+ .port = 0,
+ .group = NULL,
+ .mode = 0 });
+
+ remain = split_if_spec(str, &init->vde_switch, mac_out, &port_str,
+ &init->group, &mode_str, &init->descr, NULL);
+
+ if (remain != NULL)
+ printk(KERN_WARNING "vde_setup - Ignoring extra data :"
+ "'%s'\n", remain);
+
+ if (port_str != NULL) {
+ init->port = simple_strtoul(port_str, &last, 10);
+ if ((*last != '\0') || (last == port_str)) {
+ printk(KERN_ERR "vde_setup - Bad port : '%s'\n",
+ port_str);
+ return 0;
+ }
+ }
+
+ if (mode_str != NULL) {
+ init->mode = simple_strtoul(mode_str, &last, 8);
+ if ((*last != '\0') || (last == mode_str)) {
+ printk(KERN_ERR "vde_setup - Bad mode : '%s'\n",
+ mode_str);
+ return 0;
+ }
+ }
+
+ printk(KERN_INFO "Configured vde device: %s\n", init->vde_switch ?
+ init->vde_switch : "(default socket)");
+
+ return 1;
+}
+
+static struct transport vde_transport = {
+ .list = LIST_HEAD_INIT(vde_transport.list),
+ .name = "vde",
+ .setup = vde_setup,
+ .user = &vde_user_info,
+ .kern = &vde_kern_info,
+ .private_size = sizeof(struct vde_data),
+ .setup_size = sizeof(struct vde_init),
+};
+
+static int register_vde(void)
+{
+ register_transport(&vde_transport);
+ return 0;
+}
+
+late_initcall(register_vde);