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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182/* 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 2struct tun_msg_ctl { unsigned short type; unsigned short num; void *ptr;};
#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);/* Callers must hold the consumer_lock of the ring of file */void tun_wake_queue(struct file *file, int consumed);
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 void tun_wake_queue(struct file *f, int consumed) {}
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 */