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User space can request hardware and/or software time stamping. Reporting of the result(s) via a new control message is enabled separately for each field in the message because some of the fields may require additional computation and thus cause overhead. User space can tell the different kinds of time stamps apart and choose what suits its needs. When a TX timestamp operation is requested, the TX skb will be cloned and the clone will be time stamped (in hardware or software) and added to the socket error queue of the skb, if the skb has a socket associated with it. The actual TX timestamp will reach userspace as a RX timestamp on the cloned packet. If timestamping is requested and no timestamping is done in the device driver (potentially this may use hardware timestamping), it will be done in software after the device's start_hard_xmit routine. Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#ifndef _ASM_X86_SOCKET_H
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#define _ASM_X86_SOCKET_H
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#include <asm/sockios.h>
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/* For setsockopt(2) */
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#define SOL_SOCKET 1
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#define SO_DEBUG 1
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#define SO_REUSEADDR 2
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#define SO_TYPE 3
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#define SO_ERROR 4
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#define SO_DONTROUTE 5
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#define SO_BROADCAST 6
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#define SO_SNDBUF 7
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#define SO_RCVBUF 8
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#define SO_SNDBUFFORCE 32
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#define SO_RCVBUFFORCE 33
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#define SO_KEEPALIVE 9
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#define SO_OOBINLINE 10
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#define SO_NO_CHECK 11
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#define SO_PRIORITY 12
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#define SO_LINGER 13
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#define SO_BSDCOMPAT 14
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/* To add :#define SO_REUSEPORT 15 */
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#define SO_PASSCRED 16
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#define SO_PEERCRED 17
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#define SO_RCVLOWAT 18
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#define SO_SNDLOWAT 19
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#define SO_RCVTIMEO 20
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#define SO_SNDTIMEO 21
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/* Security levels - as per NRL IPv6 - don't actually do anything */
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#define SO_SECURITY_AUTHENTICATION 22
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 23
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#define SO_SECURITY_ENCRYPTION_NETWORK 24
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#define SO_BINDTODEVICE 25
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/* Socket filtering */
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#define SO_ATTACH_FILTER 26
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#define SO_DETACH_FILTER 27
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#define SO_PEERNAME 28
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#define SO_TIMESTAMP 29
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#define SCM_TIMESTAMP SO_TIMESTAMP
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#define SO_ACCEPTCONN 30
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#define SO_PEERSEC 31
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#define SO_PASSSEC 34
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#define SO_TIMESTAMPING 37
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#define SCM_TIMESTAMPING SO_TIMESTAMPING
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#endif /* _ASM_X86_SOCKET_H */
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