1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_ERRQUEUE_H
3#define _UAPI_LINUX_ERRQUEUE_H
4
5#include <linux/types.h>
6#include <linux/time_types.h>
7
8/* RFC 4884: return offset to extension struct + validation */
9struct sock_ee_data_rfc4884 {
10	__u16	len;
11	__u8	flags;
12	__u8	reserved;
13};
14
15struct sock_extended_err {
16	__u32	ee_errno;
17	__u8	ee_origin;
18	__u8	ee_type;
19	__u8	ee_code;
20	__u8	ee_pad;
21	__u32   ee_info;
22	union	{
23		__u32   ee_data;
24		struct sock_ee_data_rfc4884 ee_rfc4884;
25	};
26};
27
28#define SO_EE_ORIGIN_NONE	0
29#define SO_EE_ORIGIN_LOCAL	1
30#define SO_EE_ORIGIN_ICMP	2
31#define SO_EE_ORIGIN_ICMP6	3
32#define SO_EE_ORIGIN_TXSTATUS	4
33#define SO_EE_ORIGIN_ZEROCOPY	5
34#define SO_EE_ORIGIN_TXTIME	6
35#define SO_EE_ORIGIN_TIMESTAMPING SO_EE_ORIGIN_TXSTATUS
36
37#define SO_EE_OFFENDER(ee)	((struct sockaddr*)((ee)+1))
38
39#define SO_EE_CODE_ZEROCOPY_COPIED	1
40
41#define SO_EE_CODE_TXTIME_INVALID_PARAM	1
42#define SO_EE_CODE_TXTIME_MISSED	2
43
44#define SO_EE_RFC4884_FLAG_INVALID	1
45
46/**
47 *	struct scm_timestamping - timestamps exposed through cmsg
48 *
49 *	The timestamping interfaces SO_TIMESTAMPING, MSG_TSTAMP_*
50 *	communicate network timestamps by passing this struct in a cmsg with
51 *	recvmsg(). See Documentation/networking/timestamping.rst for details.
52 *	User space sees a timespec definition that matches either
53 *	__kernel_timespec or __kernel_old_timespec, in the kernel we
54 *	require two structure definitions to provide both.
55 */
56struct scm_timestamping {
57#ifdef __KERNEL__
58	struct __kernel_old_timespec ts[3];
59#else
60	struct timespec ts[3];
61#endif
62};
63
64struct scm_timestamping64 {
65	struct __kernel_timespec ts[3];
66};
67
68/* The type of scm_timestamping, passed in sock_extended_err ee_info.
69 * This defines the type of ts[0]. For SCM_TSTAMP_SND only, if ts[0]
70 * is zero, then this is a hardware timestamp and recorded in ts[2].
71 */
72enum {
73	SCM_TSTAMP_SND,		/* driver passed skb to NIC, or HW */
74	SCM_TSTAMP_SCHED,	/* data entered the packet scheduler */
75	SCM_TSTAMP_ACK,		/* data acknowledged by peer */
76};
77
78#endif /* _UAPI_LINUX_ERRQUEUE_H */
79