From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/um/os-Linux/drivers/tuntap_kern.c | 86 ++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 arch/um/os-Linux/drivers/tuntap_kern.c (limited to 'arch/um/os-Linux/drivers/tuntap_kern.c') diff --git a/arch/um/os-Linux/drivers/tuntap_kern.c b/arch/um/os-Linux/drivers/tuntap_kern.c new file mode 100644 index 000000000..adcb6717b --- /dev/null +++ b/arch/um/os-Linux/drivers/tuntap_kern.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + */ + +#include +#include +#include +#include +#include +#include "tuntap.h" + +struct tuntap_init { + char *dev_name; + char *gate_addr; +}; + +static void tuntap_init(struct net_device *dev, void *data) +{ + struct uml_net_private *pri; + struct tuntap_data *tpri; + struct tuntap_init *init = data; + + pri = netdev_priv(dev); + tpri = (struct tuntap_data *) pri->user; + tpri->dev_name = init->dev_name; + tpri->fixed_config = (init->dev_name != NULL); + tpri->gate_addr = init->gate_addr; + tpri->fd = -1; + tpri->dev = dev; + + printk(KERN_INFO "TUN/TAP backend - "); + if (tpri->gate_addr != NULL) + printk(KERN_CONT "IP = %s", tpri->gate_addr); + printk(KERN_CONT "\n"); +} + +static int tuntap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + return net_read(fd, skb_mac_header(skb), + skb->dev->mtu + ETH_HEADER_OTHER); +} + +static int tuntap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + return net_write(fd, skb->data, skb->len); +} + +const struct net_kern_info tuntap_kern_info = { + .init = tuntap_init, + .protocol = eth_protocol, + .read = tuntap_read, + .write = tuntap_write, +}; + +int tuntap_setup(char *str, char **mac_out, void *data) +{ + struct tuntap_init *init = data; + + *init = ((struct tuntap_init) + { .dev_name = NULL, + .gate_addr = NULL }); + if (tap_setup_common(str, "tuntap", &init->dev_name, mac_out, + &init->gate_addr)) + return 0; + + return 1; +} + +static struct transport tuntap_transport = { + .list = LIST_HEAD_INIT(tuntap_transport.list), + .name = "tuntap", + .setup = tuntap_setup, + .user = &tuntap_user_info, + .kern = &tuntap_kern_info, + .private_size = sizeof(struct tuntap_data), + .setup_size = sizeof(struct tuntap_init), +}; + +static int register_tuntap(void) +{ + register_transport(&tuntap_transport); + return 0; +} + +late_initcall(register_tuntap); -- cgit v1.2.3