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linux-next/include/uapi/linux/net_tstamp.h
Greg Kroah-Hartman 6f52b16c5b License cleanup: add SPDX license identifier to uapi header files with no license 
Many user space API headers are missing licensing information, which
makes it hard for compliance tools to determine the correct license.

By default are files without license information under the default
license of the kernel, which is GPLV2.  Marking them GPLV2 would exclude
them from being included in non GPLV2 code, which is obviously not
intended. The user space API headers fall under the syscall exception
which is in the kernels COPYING file:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

otherwise syscall usage would not be possible.

Update the files which contain no license information with an SPDX
license identifier.  The chosen identifier is 'GPL-2.0 WITH
Linux-syscall-note' which is the officially assigned identifier for the
Linux syscall exception.  SPDX license identifiers are a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:19:54 +01:00

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Userspace API for hardware time stamping of network packets
*
* Copyright (C) 2008,2009 Intel Corporation
* Author: Patrick Ohly <patrick.ohly@intel.com>
*
*/
#ifndef _NET_TIMESTAMPING_H
#define _NET_TIMESTAMPING_H
#include <linux/types.h>
#include <linux/socket.h> /* for SO_TIMESTAMPING */
/* SO_TIMESTAMPING gets an integer bit field comprised of these values */
enum {
SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
SOF_TIMESTAMPING_TX_SOFTWARE = (1<<1),
SOF_TIMESTAMPING_RX_HARDWARE = (1<<2),
SOF_TIMESTAMPING_RX_SOFTWARE = (1<<3),
SOF_TIMESTAMPING_SOFTWARE = (1<<4),
SOF_TIMESTAMPING_SYS_HARDWARE = (1<<5),
SOF_TIMESTAMPING_RAW_HARDWARE = (1<<6),
SOF_TIMESTAMPING_OPT_ID = (1<<7),
SOF_TIMESTAMPING_TX_SCHED = (1<<8),
SOF_TIMESTAMPING_TX_ACK = (1<<9),
SOF_TIMESTAMPING_OPT_CMSG = (1<<10),
SOF_TIMESTAMPING_OPT_TSONLY = (1<<11),
SOF_TIMESTAMPING_OPT_STATS = (1<<12),
SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13),
SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14),
SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TX_SWHW,
SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
SOF_TIMESTAMPING_LAST
};
/*
* SO_TIMESTAMPING flags are either for recording a packet timestamp or for
* reporting the timestamp to user space.
* Recording flags can be set both via socket options and control messages.
*/
#define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \
SOF_TIMESTAMPING_TX_SOFTWARE | \
SOF_TIMESTAMPING_TX_SCHED | \
SOF_TIMESTAMPING_TX_ACK)
/**
* struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
*
* @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
* @tx_type: one of HWTSTAMP_TX_*
* @rx_filter: one of HWTSTAMP_FILTER_*
*
* %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
* ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
* driver or hardware does not support the requested @rx_filter value,
* the driver may use a more general filter mode. In this case
* @rx_filter will indicate the actual mode on return.
*/
struct hwtstamp_config {
int flags;
int tx_type;
int rx_filter;
};
/* possible values for hwtstamp_config->tx_type */
enum hwtstamp_tx_types {
/*
* No outgoing packet will need hardware time stamping;
* should a packet arrive which asks for it, no hardware
* time stamping will be done.
*/
HWTSTAMP_TX_OFF,
/*
* Enables hardware time stamping for outgoing packets;
* the sender of the packet decides which are to be
* time stamped by setting %SOF_TIMESTAMPING_TX_SOFTWARE
* before sending the packet.
*/
HWTSTAMP_TX_ON,
/*
* Enables time stamping for outgoing packets just as
* HWTSTAMP_TX_ON does, but also enables time stamp insertion
* directly into Sync packets. In this case, transmitted Sync
* packets will not received a time stamp via the socket error
* queue.
*/
HWTSTAMP_TX_ONESTEP_SYNC,
};
/* possible values for hwtstamp_config->rx_filter */
enum hwtstamp_rx_filters {
/* time stamp no incoming packet at all */
HWTSTAMP_FILTER_NONE,
/* time stamp any incoming packet */
HWTSTAMP_FILTER_ALL,
/* return value: time stamp all packets requested plus some others */
HWTSTAMP_FILTER_SOME,
/* PTP v1, UDP, any kind of event packet */
HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
/* PTP v1, UDP, Sync packet */
HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
/* PTP v1, UDP, Delay_req packet */
HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
/* PTP v2, UDP, any kind of event packet */
HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
/* PTP v2, UDP, Sync packet */
HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
/* PTP v2, UDP, Delay_req packet */
HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
/* 802.AS1, Ethernet, any kind of event packet */
HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
/* 802.AS1, Ethernet, Sync packet */
HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
/* 802.AS1, Ethernet, Delay_req packet */
HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
/* PTP v2/802.AS1, any layer, any kind of event packet */
HWTSTAMP_FILTER_PTP_V2_EVENT,
/* PTP v2/802.AS1, any layer, Sync packet */
HWTSTAMP_FILTER_PTP_V2_SYNC,
/* PTP v2/802.AS1, any layer, Delay_req packet */
HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
/* NTP, UDP, all versions and packet modes */
HWTSTAMP_FILTER_NTP_ALL,
};
/* SCM_TIMESTAMPING_PKTINFO control message */
struct scm_ts_pktinfo {
__u32 if_index;
__u32 pkt_length;
__u32 reserved[2];
};
#endif /* _NET_TIMESTAMPING_H */
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