[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support

Now that network timestamps use ktime_t infrastructure, we can add a new
SOL_SOCKET sockopt  SO_TIMESTAMPNS.

This command is similar to SO_TIMESTAMP, but permits transmission of
a 'timespec struct' instead of a 'timeval struct' control message.
(nanosecond resolution instead of microsecond)

Control message is labelled SCM_TIMESTAMPNS instead of SCM_TIMESTAMP

A socket cannot mix SO_TIMESTAMP and SO_TIMESTAMPNS : the two modes are
mutually exclusive.

sock_recv_timestamp() became too big to be fully inlined so I added a
__sock_recv_timestamp() helper function.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
CC: linux-arch@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

include/asm-alpha/socket.h

@@ -52,6 +52,8 @@
 
 #define SO_PEERSEC		30
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION		19

include/asm-arm/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-arm26/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-avr32/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* __ASM_AVR32_SOCKET_H */

include/asm-cris/socket.h

@@ -51,6 +51,8 @@
 
 #define SO_PEERSEC             31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */
 

include/asm-frv/socket.h

@@ -49,6 +49,8 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */
 

include/asm-h8300/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-i386/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-ia64/socket.h

@@ -58,5 +58,7 @@
 
 #define SO_PEERSEC             31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_IA64_SOCKET_H */

include/asm-m32r/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_M32R_SOCKET_H */

include/asm-m68k/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC             31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-mips/socket.h

@@ -70,6 +70,8 @@ To add: #define SO_REUSEPORT 0x0200	/* Allow local address and port reuse.  */
 #define SO_SNDBUFFORCE		31
 #define SO_RCVBUFFORCE		33
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #ifdef __KERNEL__
 

include/asm-parisc/socket.h

@@ -33,6 +33,8 @@
 #define SO_PEERCRED	0x4011
 #define SO_TIMESTAMP	0x4012
 #define SCM_TIMESTAMP	SO_TIMESTAMP
+#define SO_TIMESTAMPNS	0x4013
+#define SCM_TIMESTAMPNS	SO_TIMESTAMPNS
 
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION		0x4016

include/asm-powerpc/socket.h

@@ -56,5 +56,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif	/* _ASM_POWERPC_SOCKET_H */

include/asm-s390/socket.h

@@ -57,5 +57,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */

include/asm-sh/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* __ASM_SH_SOCKET_H */

include/asm-sparc/socket.h

@@ -49,6 +49,8 @@
 
 #define SO_PEERSEC		0x001e
 #define SO_PASSSEC		0x001f
+#define SO_TIMESTAMPNS		0x0021
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION		0x5001

include/asm-sparc64/socket.h

@@ -49,6 +49,8 @@
 
 #define SO_PEERSEC		0x001e
 #define SO_PASSSEC		0x001f
+#define SO_TIMESTAMPNS		0x0021
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION		0x5001

include/asm-v850/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* __V850_SOCKET_H__ */

include/asm-x86_64/socket.h

@@ -49,5 +49,7 @@
 
 #define SO_PEERSEC             31
 #define SO_PASSSEC		34
+#define SO_TIMESTAMPNS		35
+#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #endif /* _ASM_SOCKET_H */