1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_ERRQUEUE_H
3#define _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 struct timespec ts[3];
58};
59
60struct scm_timestamping64 {
61 struct __kernel_timespec ts[3];
62};
63
64/* The type of scm_timestamping, passed in sock_extended_err ee_info.
65 * This defines the type of ts[0]. For SCM_TSTAMP_SND only, if ts[0]
66 * is zero, then this is a hardware timestamp and recorded in ts[2].
67 */
68enum {
69 SCM_TSTAMP_SND, /* driver passed skb to NIC, or HW */
70 SCM_TSTAMP_SCHED, /* data entered the packet scheduler */
71 SCM_TSTAMP_ACK, /* data acknowledged by peer */
72 SCM_TSTAMP_COMPLETION, /* packet tx completion */
73};
74
75#endif /* _LINUX_ERRQUEUE_H */