Commit | Line | Data |
---|---|---|
c942fddf | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * Universal TUN/TAP device driver. | |
4 | * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com> | |
1da177e4 | 5 | */ |
1da177e4 LT |
6 | #ifndef __IF_TUN_H |
7 | #define __IF_TUN_H | |
8 | ||
607ca46e | 9 | #include <uapi/linux/if_tun.h> |
fe8dd45b | 10 | #include <uapi/linux/virtio_net.h> |
1da177e4 | 11 | |
fc72d1d5 JW |
12 | #define TUN_XDP_FLAG 0x1UL |
13 | ||
fe8dd45b JW |
14 | #define TUN_MSG_UBUF 1 |
15 | #define TUN_MSG_PTR 2 | |
16 | struct tun_msg_ctl { | |
17 | unsigned short type; | |
18 | unsigned short num; | |
19 | void *ptr; | |
20 | }; | |
21 | ||
22 | struct tun_xdp_hdr { | |
23 | int buflen; | |
24 | struct virtio_net_hdr gso; | |
25 | }; | |
26 | ||
05c2828c MT |
27 | #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE) |
28 | struct socket *tun_get_socket(struct file *); | |
5990a305 | 29 | struct ptr_ring *tun_get_tx_ring(struct file *file); |
596b5ef4 MŻ |
30 | static inline bool tun_is_xdp_frame(void *ptr) |
31 | { | |
32 | return (unsigned long)ptr & TUN_XDP_FLAG; | |
33 | } | |
34 | static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp) | |
35 | { | |
36 | return (void *)((unsigned long)xdp | TUN_XDP_FLAG); | |
37 | } | |
38 | static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr) | |
39 | { | |
40 | return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG); | |
41 | } | |
3a403076 | 42 | void tun_ptr_free(void *ptr); |
05c2828c MT |
43 | #else |
44 | #include <linux/err.h> | |
45 | #include <linux/errno.h> | |
46 | struct file; | |
47 | struct socket; | |
48 | static inline struct socket *tun_get_socket(struct file *f) | |
49 | { | |
50 | return ERR_PTR(-EINVAL); | |
51 | } | |
5990a305 | 52 | static inline struct ptr_ring *tun_get_tx_ring(struct file *f) |
83339c6b JW |
53 | { |
54 | return ERR_PTR(-EINVAL); | |
55 | } | |
1ffcbc85 | 56 | static inline bool tun_is_xdp_frame(void *ptr) |
fc72d1d5 JW |
57 | { |
58 | return false; | |
59 | } | |
b558b6c2 | 60 | static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp) |
fc72d1d5 JW |
61 | { |
62 | return NULL; | |
63 | } | |
b558b6c2 | 64 | static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr) |
fc72d1d5 JW |
65 | { |
66 | return NULL; | |
67 | } | |
3a403076 JW |
68 | static inline void tun_ptr_free(void *ptr) |
69 | { | |
70 | } | |
05c2828c | 71 | #endif /* CONFIG_TUN */ |
1da177e4 | 72 | #endif /* __IF_TUN_H */ |