f24b9be595
Applications that request kernel tx timestamps with SO_TIMESTAMPING read timestamps as recvmsg() ancillary data. The response is defined implicitly as timespec[3]. 1) define struct scm_timestamping explicitly and 2) add support for new tstamp types. On tx, scm_timestamping always accompanies a sock_extended_err. Define previously unused field ee_info to signal the type of ts[0]. Introduce SCM_TSTAMP_SND to define the existing behavior. The reception path is not modified. On rx, no struct similar to sock_extended_err is passed along with SCM_TIMESTAMPING. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
#ifndef _UAPI_LINUX_ERRQUEUE_H
|
|
#define _UAPI_LINUX_ERRQUEUE_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct sock_extended_err {
|
|
__u32 ee_errno;
|
|
__u8 ee_origin;
|
|
__u8 ee_type;
|
|
__u8 ee_code;
|
|
__u8 ee_pad;
|
|
__u32 ee_info;
|
|
__u32 ee_data;
|
|
};
|
|
|
|
#define SO_EE_ORIGIN_NONE 0
|
|
#define SO_EE_ORIGIN_LOCAL 1
|
|
#define SO_EE_ORIGIN_ICMP 2
|
|
#define SO_EE_ORIGIN_ICMP6 3
|
|
#define SO_EE_ORIGIN_TXSTATUS 4
|
|
#define SO_EE_ORIGIN_TIMESTAMPING SO_EE_ORIGIN_TXSTATUS
|
|
|
|
#define SO_EE_OFFENDER(ee) ((struct sockaddr*)((ee)+1))
|
|
|
|
/**
|
|
* struct scm_timestamping - timestamps exposed through cmsg
|
|
*
|
|
* The timestamping interfaces SO_TIMESTAMPING, MSG_TSTAMP_*
|
|
* communicate network timestamps by passing this struct in a cmsg with
|
|
* recvmsg(). See Documentation/networking/timestamping.txt for details.
|
|
*/
|
|
struct scm_timestamping {
|
|
struct timespec ts[3];
|
|
};
|
|
|
|
/* The type of scm_timestamping, passed in sock_extended_err ee_info.
|
|
* This defines the type of ts[0]. For SCM_TSTAMP_SND only, if ts[0]
|
|
* is zero, then this is a hardware timestamp and recorded in ts[2].
|
|
*/
|
|
enum {
|
|
SCM_TSTAMP_SND, /* driver passed skb to NIC, or HW */
|
|
};
|
|
|
|
#endif /* _UAPI_LINUX_ERRQUEUE_H */
|