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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">/* 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 &lt;patrick.ohly@intel.com&gt;
 *
 */

#ifndef _NET_TIMESTAMPING_H
#define _NET_TIMESTAMPING_H

#include &lt;linux/types.h&gt;
#include &lt;linux/socket.h&gt;   /* for SO_TIMESTAMPING */

/* SO_TIMESTAMPING gets an integer bit field comprised of these values */
enum {
	SOF_TIMESTAMPING_TX_HARDWARE = (1&lt;&lt;0),
	SOF_TIMESTAMPING_TX_SOFTWARE = (1&lt;&lt;1),
	SOF_TIMESTAMPING_RX_HARDWARE = (1&lt;&lt;2),
	SOF_TIMESTAMPING_RX_SOFTWARE = (1&lt;&lt;3),
	SOF_TIMESTAMPING_SOFTWARE = (1&lt;&lt;4),
	SOF_TIMESTAMPING_SYS_HARDWARE = (1&lt;&lt;5),
	SOF_TIMESTAMPING_RAW_HARDWARE = (1&lt;&lt;6),
	SOF_TIMESTAMPING_OPT_ID = (1&lt;&lt;7),
	SOF_TIMESTAMPING_TX_SCHED = (1&lt;&lt;8),
	SOF_TIMESTAMPING_TX_ACK = (1&lt;&lt;9),
	SOF_TIMESTAMPING_OPT_CMSG = (1&lt;&lt;10),
	SOF_TIMESTAMPING_OPT_TSONLY = (1&lt;&lt;11),
	SOF_TIMESTAMPING_OPT_STATS = (1&lt;&lt;12),
	SOF_TIMESTAMPING_OPT_PKTINFO = (1&lt;&lt;13),
	SOF_TIMESTAMPING_OPT_TX_SWHW = (1&lt;&lt;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:	one of HWTSTAMP_FLAG_*
 * @tx_type:	one of HWTSTAMP_TX_*
 * @rx_filter:	one of HWTSTAMP_FILTER_*
 *
 * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &amp;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-&gt;flags */
enum hwtstamp_flags {
	/*
	 * With this flag, the user could get bond active interface&#039;s
	 * PHC index. Note this PHC index is not stable as when there
	 * is a failover, the bond active interface will be changed, so
	 * will be the PHC index.
	 */
	HWTSTAMP_FLAG_BONDED_PHC_INDEX = (1&lt;&lt;0),
#define HWTSTAMP_FLAG_BONDED_PHC_INDEX	HWTSTAMP_FLAG_BONDED_PHC_INDEX

	HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_BONDED_PHC_INDEX,
	HWTSTAMP_FLAG_MASK = (HWTSTAMP_FLAG_LAST - 1) | HWTSTAMP_FLAG_LAST
};

/* possible values for hwtstamp_config-&gt;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,

	/*
	 * Same as HWTSTAMP_TX_ONESTEP_SYNC, but also enables time
	 * stamp insertion directly into PDelay_Resp packets. In this
	 * case, neither transmitted Sync nor PDelay_Resp packets will
	 * receive a time stamp via the socket error queue.
	 */
	HWTSTAMP_TX_ONESTEP_P2P,

	/* add new constants above here */
	__HWTSTAMP_TX_CNT
};

/* possible values for hwtstamp_config-&gt;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,

	/* add new constants above here */
	__HWTSTAMP_FILTER_CNT
};

/* SCM_TIMESTAMPING_PKTINFO control message */
struct scm_ts_pktinfo {
	__u32 if_index;
	__u32 pkt_length;
	__u32 reserved[2];
};

/*
 * SO_TXTIME gets a struct sock_txtime with flags being an integer bit
 * field comprised of these values.
 */
enum txtime_flags {
	SOF_TXTIME_DEADLINE_MODE = (1 &lt;&lt; 0),
	SOF_TXTIME_REPORT_ERRORS = (1 &lt;&lt; 1),

	SOF_TXTIME_FLAGS_LAST = SOF_TXTIME_REPORT_ERRORS,
	SOF_TXTIME_FLAGS_MASK = (SOF_TXTIME_FLAGS_LAST - 1) |
				 SOF_TXTIME_FLAGS_LAST
};

struct sock_txtime {
	__kernel_clockid_t	clockid;/* reference clockid */
	__u32			flags;	/* as defined by enum txtime_flags */
};

#endif /* _NET_TIMESTAMPING_H */
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