forked from mirrors/linux
596b5ef458
This provides a minor performance boost by virtue of inlining instead of cross module function calls. Test: builds Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200819010710.3959310-2-zenczykowski@gmail.com
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Universal TUN/TAP device driver.
|
|
* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
|
|
*/
|
|
#ifndef __IF_TUN_H
|
|
#define __IF_TUN_H
|
|
|
|
#include <uapi/linux/if_tun.h>
|
|
#include <uapi/linux/virtio_net.h>
|
|
|
|
#define TUN_XDP_FLAG 0x1UL
|
|
|
|
#define TUN_MSG_UBUF 1
|
|
#define TUN_MSG_PTR 2
|
|
struct tun_msg_ctl {
|
|
unsigned short type;
|
|
unsigned short num;
|
|
void *ptr;
|
|
};
|
|
|
|
struct tun_xdp_hdr {
|
|
int buflen;
|
|
struct virtio_net_hdr gso;
|
|
};
|
|
|
|
#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);
|
|
static inline bool tun_is_xdp_frame(void *ptr)
|
|
{
|
|
return (unsigned long)ptr & TUN_XDP_FLAG;
|
|
}
|
|
static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp)
|
|
{
|
|
return (void *)((unsigned long)xdp | TUN_XDP_FLAG);
|
|
}
|
|
static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr)
|
|
{
|
|
return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG);
|
|
}
|
|
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(struct xdp_frame *xdp)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void tun_ptr_free(void *ptr)
|
|
{
|
|
}
|
|
#endif /* CONFIG_TUN */
|
|
#endif /* __IF_TUN_H */
|