1ffcbc8537
The tuntap driver invented it's own driver specific way of queuing XDP packets, by storing the xdp_buff information in the top of the XDP frame data. Convert it over to use the more generic xdp_frame structure. The main problem with the in-driver method is that the xdp_rxq_info pointer cannot be trused/used when dequeueing the frame. V3: Remove check based on feedback from Jason Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
|
|
* Universal TUN/TAP device driver.
|
|
* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
#ifndef __IF_TUN_H
|
|
#define __IF_TUN_H
|
|
|
|
#include <uapi/linux/if_tun.h>
|
|
|
|
#define TUN_XDP_FLAG 0x1UL
|
|
|
|
#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
|
|
struct socket *tun_get_socket(struct file *);
|
|
struct ptr_ring *tun_get_tx_ring(struct file *file);
|
|
bool tun_is_xdp_frame(void *ptr);
|
|
void *tun_xdp_to_ptr(void *ptr);
|
|
void *tun_ptr_to_xdp(void *ptr);
|
|
void tun_ptr_free(void *ptr);
|
|
#else
|
|
#include <linux/err.h>
|
|
#include <linux/errno.h>
|
|
struct file;
|
|
struct socket;
|
|
static inline struct socket *tun_get_socket(struct file *f)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
static inline bool tun_is_xdp_frame(void *ptr)
|
|
{
|
|
return false;
|
|
}
|
|
static inline void *tun_xdp_to_ptr(void *ptr)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void *tun_ptr_to_xdp(void *ptr)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void tun_ptr_free(void *ptr)
|
|
{
|
|
}
|
|
#endif /* CONFIG_TUN */
|
|
#endif /* __IF_TUN_H */
|