[PATCH v3 0/8] net: y2038-safe socket timestamps

[PATCH v3 0/8] net: y2038-safe socket timestamps

[Deepa Dinamani]

The series introduces new socket timestamps that are
y2038 safe.

The time data types used for the existing socket timestamp
options: SO_TIMESTAMP, SO_TIMESTAMPNS and SO_TIMESTAMPING
are not y2038 safe. The series introduces SO_TIMESTAMP_NEW,
SO_TIMESTAMPNS_NEW and SO_TIMESTAMPING_NEW to replace these.
These new timestamps can be used on all architectures.

The alternative considered was to extend the sys_setsockopt()
by using the flags. We did not receive any strong opinions about
either of the approaches. Hence, this was chosen, as glibc folks
preferred this.

The series does not deal with updating the internal kernel socket
calls like rxrpc to make them y2038 safe. This will be dealt
with separately.

Note that the timestamps behavior already does not match the
man page specific behavior:
SIOCGSTAMP
    This ioctl should only be used if the socket option SO_TIMESTAMP
	is not set on the socket. Otherwise, it returns the timestamp of
	the last packet that was received while SO_TIMESTAMP was not set,
	or it fails if no such packet has been received,
	(i.e., ioctl(2) returns -1 with errno set to ENOENT).
	
The recommendation is to update the man page to remove the above statement.

The overview of the series is as below:
1. Delete asm specific socket.h when possible.
2. Support SO/SCM_TIMESTAMP* options only in userspace.
3. Rename current SO/SCM_TIMESTAMP* to SO/SCM_TIMESTAMP*_OLD.
3. Alter socket options so that SOCK_RCVTSTAMPNS does
   not rely on SOCK_RCVTSTAMP.
4. Introduce y2038 safe types for socket timestamp.
5. Introduce new y2038 safe socket options SO/SCM_TIMESTAMP*_NEW.

Changes since v2:
* Removed extra functions to reduce diff churn as per code review

Changes since v1:
* Dropped the change to disentangle sock flags
* Renamed sock_timeval to __kernel_sock_timeval
* Updated a few comments
* Added documentation changes

Deepa Dinamani (8):
  arch: Use asm-generic/socket.h when possible
  sockopt: Rename SO_TIMESTAMP* to SO_TIMESTAMP*_OLD
  arch: sparc: Override struct __kernel_old_timeval
  socket: Use old_timeval types for socket timestamps
  socket: Add struct __kernel_sock_timeval
  socket: Add SO_TIMESTAMP[NS]_NEW
  socket: Add SO_TIMESTAMPING_NEW
  socket: Update timestamping Documentation

 Documentation/networking/timestamping.txt |  43 +++++++-
 arch/alpha/include/uapi/asm/socket.h      |  35 +++++--
 arch/ia64/include/uapi/asm/Kbuild         |   1 +
 arch/ia64/include/uapi/asm/socket.h       | 120 ---------------------
 arch/mips/include/uapi/asm/socket.h       |  34 ++++--
 arch/parisc/include/uapi/asm/socket.h     |  34 ++++--
 arch/s390/include/uapi/asm/Kbuild         |   1 +
 arch/s390/include/uapi/asm/socket.h       | 117 ---------------------
 arch/sparc/include/uapi/asm/posix_types.h |  10 ++
 arch/sparc/include/uapi/asm/socket.h      |  36 +++++--
 arch/x86/include/uapi/asm/Kbuild          |   1 +
 arch/x86/include/uapi/asm/socket.h        |   1 -
 arch/xtensa/include/asm/Kbuild            |   1 +
 arch/xtensa/include/uapi/asm/Kbuild       |   1 +
 arch/xtensa/include/uapi/asm/socket.h     | 122 ----------------------
 drivers/isdn/mISDN/socket.c               |   2 +-
 include/linux/skbuff.h                    |  24 ++++-
 include/linux/socket.h                    |   8 ++
 include/net/sock.h                        |   1 +
 include/uapi/asm-generic/socket.h         |  35 +++++--
 include/uapi/linux/errqueue.h             |   4 +
 include/uapi/linux/time.h                 |   7 ++
 net/bluetooth/hci_sock.c                  |   4 +-
 net/compat.c                              |  14 +--
 net/core/scm.c                            |  27 +++++
 net/core/sock.c                           |  43 ++++++--
 net/ipv4/tcp.c                            |  61 +++++++----
 net/rds/af_rds.c                          |  10 +-
 net/rds/recv.c                            |  18 +++-
 net/rxrpc/local_object.c                  |   2 +-
 net/smc/af_smc.c                          |   3 +-
 net/socket.c                              |  50 ++++++---
 32 files changed, 404 insertions(+), 466 deletions(-)
 delete mode 100644 arch/ia64/include/uapi/asm/socket.h
 delete mode 100644 arch/s390/include/uapi/asm/socket.h
 delete mode 100644 arch/x86/include/uapi/asm/socket.h
 delete mode 100644 arch/xtensa/include/uapi/asm/socket.h


base-commit: a4983672f9ca4c8393f26b6b80710e6c78886b8c
-- 
2.17.1

Cc: chris@zankel.net
Cc: deller@gmx.de
Cc: dhowells@redhat.com
Cc: fenghua.yu@intel.com
Cc: isdn@linux-pingi.de
Cc: jejb@parisc-linux.org
Cc: linux-afs@lists.infradead.org
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-rdma@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: netdev@vger.kernel.org
Cc: ralf@linux-mips.org
Cc: rth@twiddle.net
Cc: schwidefsky@de.ibm.com
Cc: sparclinux@vger.kernel.org
Cc: tglx@linutronix.de
Cc: ubraun@linux.ibm.com

[PATCH v3 1/8] arch: Use asm-generic/socket.h when possible

[Deepa Dinamani]

Many architectures maintain an arch specific copy of the
file even though there are no differences with the asm-generic
one. Allow these architectures to use the generic one instead.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: chris@zankel.net
Cc: fenghua.yu@intel.com
Cc: tglx@linutronix.de
Cc: schwidefsky@de.ibm.com
Cc: linux-ia64@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-s390@vger.kernel.org
---
 arch/ia64/include/uapi/asm/Kbuild     |   1 +
 arch/ia64/include/uapi/asm/socket.h   | 120 -------------------------
 arch/s390/include/uapi/asm/Kbuild     |   1 +
 arch/s390/include/uapi/asm/socket.h   | 117 ------------------------
 arch/x86/include/uapi/asm/Kbuild      |   1 +
 arch/x86/include/uapi/asm/socket.h    |   1 -
 arch/xtensa/include/asm/Kbuild        |   1 +
 arch/xtensa/include/uapi/asm/Kbuild   |   1 +
 arch/xtensa/include/uapi/asm/socket.h | 122 --------------------------
 9 files changed, 5 insertions(+), 360 deletions(-)
 delete mode 100644 arch/ia64/include/uapi/asm/socket.h
 delete mode 100644 arch/s390/include/uapi/asm/socket.h
 delete mode 100644 arch/x86/include/uapi/asm/socket.h
 delete mode 100644 arch/xtensa/include/uapi/asm/socket.h

diff --git a/arch/ia64/include/uapi/asm/Kbuild b/arch/ia64/include/uapi/asm/Kbuild
index ccce0ea65e05..37ea5ec1b94d 100644
--- a/arch/ia64/include/uapi/asm/Kbuild
+++ b/arch/ia64/include/uapi/asm/Kbuild
@@ -9,3 +9,4 @@ generic-y += msgbuf.h
 generic-y += poll.h
 generic-y += sembuf.h
 generic-y += shmbuf.h
+generic-y += socket.h
diff --git a/arch/ia64/include/uapi/asm/socket.h b/arch/ia64/include/uapi/asm/socket.h
deleted file mode 100644
index c872c4e6bafb..000000000000
--- a/arch/ia64/include/uapi/asm/socket.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _ASM_IA64_SOCKET_H
-#define _ASM_IA64_SOCKET_H
-
-/*
- * Socket related defines.
- *
- * Based on <asm-i386/socket.h>.
- *
- * Modified 1998-2000
- *	David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
- */
-
-#include <asm/sockios.h>
-
-/* For setsockopt(2) */
-#define SOL_SOCKET	1
-
-#define SO_DEBUG	1
-#define SO_REUSEADDR	2
-#define SO_TYPE		3
-#define SO_ERROR	4
-#define SO_DONTROUTE	5
-#define SO_BROADCAST	6
-#define SO_SNDBUF	7
-#define SO_RCVBUF	8
-#define SO_SNDBUFFORCE	32
-#define SO_RCVBUFFORCE	33
-#define SO_KEEPALIVE	9
-#define SO_OOBINLINE	10
-#define SO_NO_CHECK	11
-#define SO_PRIORITY	12
-#define SO_LINGER	13
-#define SO_BSDCOMPAT	14
-#define SO_REUSEPORT	15
-#define SO_PASSCRED	16
-#define SO_PEERCRED	17
-#define SO_RCVLOWAT	18
-#define SO_SNDLOWAT	19
-#define SO_RCVTIMEO	20
-#define SO_SNDTIMEO	21
-
-/* Security levels - as per NRL IPv6 - don't actually do anything */
-#define SO_SECURITY_AUTHENTICATION		22
-#define SO_SECURITY_ENCRYPTION_TRANSPORT	23
-#define SO_SECURITY_ENCRYPTION_NETWORK		24
-
-#define SO_BINDTODEVICE		25
-
-/* Socket filtering */
-#define SO_ATTACH_FILTER	26
-#define SO_DETACH_FILTER	27
-#define SO_GET_FILTER		SO_ATTACH_FILTER
-
-#define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
-
-#define SO_ACCEPTCONN		30
-
-#define SO_PEERSEC             31
-#define SO_PASSSEC		34
-#define SO_TIMESTAMPNS		35
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
-
-#define SO_MARK			36
-
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
-#define SO_PROTOCOL		38
-#define SO_DOMAIN		39
-
-#define SO_RXQ_OVFL             40
-
-#define SO_WIFI_STATUS		41
-#define SCM_WIFI_STATUS		SO_WIFI_STATUS
-#define SO_PEEK_OFF		42
-
-/* Instruct lower device to use last 4-bytes of skb data as FCS */
-#define SO_NOFCS		43
-
-#define SO_LOCK_FILTER		44
-
-#define SO_SELECT_ERR_QUEUE	45
-
-#define SO_BUSY_POLL		46
-
-#define SO_MAX_PACING_RATE	47
-
-#define SO_BPF_EXTENSIONS	48
-
-#define SO_INCOMING_CPU		49
-
-#define SO_ATTACH_BPF		50
-#define SO_DETACH_BPF		SO_DETACH_FILTER
-
-#define SO_ATTACH_REUSEPORT_CBPF	51
-#define SO_ATTACH_REUSEPORT_EBPF	52
-
-#define SO_CNX_ADVICE		53
-
-#define SCM_TIMESTAMPING_OPT_STATS	54
-
-#define SO_MEMINFO		55
-
-#define SO_INCOMING_NAPI_ID	56
-
-#define SO_COOKIE		57
-
-#define SCM_TIMESTAMPING_PKTINFO	58
-
-#define SO_PEERGROUPS		59
-
-#define SO_ZEROCOPY		60
-
-#define SO_TXTIME		61
-#define SCM_TXTIME		SO_TXTIME
-
-#endif /* _ASM_IA64_SOCKET_H */
diff --git a/arch/s390/include/uapi/asm/Kbuild b/arch/s390/include/uapi/asm/Kbuild
index dc38a90cf091..15bb61228b74 100644
--- a/arch/s390/include/uapi/asm/Kbuild
+++ b/arch/s390/include/uapi/asm/Kbuild
@@ -15,6 +15,7 @@ generic-y += poll.h
 generic-y += resource.h
 generic-y += sembuf.h
 generic-y += shmbuf.h
+generic-y += socket.h
 generic-y += sockios.h
 generic-y += swab.h
 generic-y += termbits.h
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h
deleted file mode 100644
index 39d901476ee5..000000000000
--- a/arch/s390/include/uapi/asm/socket.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- *  S390 version
- *
- *  Derived from "include/asm-i386/socket.h"
- */
-
-#ifndef _ASM_SOCKET_H
-#define _ASM_SOCKET_H
-
-#include <asm/sockios.h>
-
-/* For setsockopt(2) */
-#define SOL_SOCKET	1
-
-#define SO_DEBUG	1
-#define SO_REUSEADDR	2
-#define SO_TYPE		3
-#define SO_ERROR	4
-#define SO_DONTROUTE	5
-#define SO_BROADCAST	6
-#define SO_SNDBUF	7
-#define SO_RCVBUF	8
-#define SO_SNDBUFFORCE	32
-#define SO_RCVBUFFORCE	33
-#define SO_KEEPALIVE	9
-#define SO_OOBINLINE	10
-#define SO_NO_CHECK	11
-#define SO_PRIORITY	12
-#define SO_LINGER	13
-#define SO_BSDCOMPAT	14
-#define SO_REUSEPORT	15
-#define SO_PASSCRED	16
-#define SO_PEERCRED	17
-#define SO_RCVLOWAT	18
-#define SO_SNDLOWAT	19
-#define SO_RCVTIMEO	20
-#define SO_SNDTIMEO	21
-
-/* Security levels - as per NRL IPv6 - don't actually do anything */
-#define SO_SECURITY_AUTHENTICATION		22
-#define SO_SECURITY_ENCRYPTION_TRANSPORT	23
-#define SO_SECURITY_ENCRYPTION_NETWORK		24
-
-#define SO_BINDTODEVICE	25
-
-/* Socket filtering */
-#define SO_ATTACH_FILTER        26
-#define SO_DETACH_FILTER        27
-#define SO_GET_FILTER		SO_ATTACH_FILTER
-
-#define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
-
-#define SO_ACCEPTCONN		30
-
-#define SO_PEERSEC		31
-#define SO_PASSSEC		34
-#define SO_TIMESTAMPNS		35
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
-
-#define SO_MARK			36
-
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
-#define SO_PROTOCOL		38
-#define SO_DOMAIN		39
-
-#define SO_RXQ_OVFL             40
-
-#define SO_WIFI_STATUS		41
-#define SCM_WIFI_STATUS		SO_WIFI_STATUS
-#define SO_PEEK_OFF		42
-
-/* Instruct lower device to use last 4-bytes of skb data as FCS */
-#define SO_NOFCS		43
-
-#define SO_LOCK_FILTER		44
-
-#define SO_SELECT_ERR_QUEUE	45
-
-#define SO_BUSY_POLL		46
-
-#define SO_MAX_PACING_RATE	47
-
-#define SO_BPF_EXTENSIONS	48
-
-#define SO_INCOMING_CPU		49
-
-#define SO_ATTACH_BPF		50
-#define SO_DETACH_BPF		SO_DETACH_FILTER
-
-#define SO_ATTACH_REUSEPORT_CBPF	51
-#define SO_ATTACH_REUSEPORT_EBPF	52
-
-#define SO_CNX_ADVICE		53
-
-#define SCM_TIMESTAMPING_OPT_STATS	54
-
-#define	SO_MEMINFO		55
-
-#define SO_INCOMING_NAPI_ID	56
-
-#define SO_COOKIE		57
-
-#define SCM_TIMESTAMPING_PKTINFO	58
-
-#define SO_PEERGROUPS		59
-
-#define SO_ZEROCOPY		60
-
-#define SO_TXTIME		61
-#define SCM_TXTIME		SO_TXTIME
-
-#endif /* _ASM_SOCKET_H */
diff --git a/arch/x86/include/uapi/asm/Kbuild b/arch/x86/include/uapi/asm/Kbuild
index 322681622d1e..a400e71a13ce 100644
--- a/arch/x86/include/uapi/asm/Kbuild
+++ b/arch/x86/include/uapi/asm/Kbuild
@@ -6,3 +6,4 @@ generated-y += unistd_32.h
 generated-y += unistd_64.h
 generated-y += unistd_x32.h
 generic-y += poll.h
+generic-y += socket.h
diff --git a/arch/x86/include/uapi/asm/socket.h b/arch/x86/include/uapi/asm/socket.h
deleted file mode 100644
index 6b71384b9d8b..000000000000
--- a/arch/x86/include/uapi/asm/socket.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/socket.h>
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
index e255683cd520..809f39ce08c0 100644
--- a/arch/xtensa/include/asm/Kbuild
+++ b/arch/xtensa/include/asm/Kbuild
@@ -25,6 +25,7 @@ generic-y += percpu.h
 generic-y += preempt.h
 generic-y += rwsem.h
 generic-y += sections.h
+generic-y += socket.h
 generic-y += topology.h
 generic-y += trace_clock.h
 generic-y += vga.h
diff --git a/arch/xtensa/include/uapi/asm/Kbuild b/arch/xtensa/include/uapi/asm/Kbuild
index f95cad300369..fc2680dace55 100644
--- a/arch/xtensa/include/uapi/asm/Kbuild
+++ b/arch/xtensa/include/uapi/asm/Kbuild
@@ -10,5 +10,6 @@ generic-y += ioctl.h
 generic-y += kvm_para.h
 generic-y += resource.h
 generic-y += siginfo.h
+generic-y += socket.h
 generic-y += statfs.h
 generic-y += termios.h
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
deleted file mode 100644
index 1de07a7f7680..000000000000
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * include/asm-xtensa/socket.h
- *
- * Copied from i386.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#ifndef _XTENSA_SOCKET_H
-#define _XTENSA_SOCKET_H
-
-#include <asm/sockios.h>
-
-/* For setsockoptions(2) */
-#define SOL_SOCKET	1
-
-#define SO_DEBUG	1
-#define SO_REUSEADDR	2
-#define SO_TYPE		3
-#define SO_ERROR	4
-#define SO_DONTROUTE	5
-#define SO_BROADCAST	6
-#define SO_SNDBUF	7
-#define SO_RCVBUF	8
-#define SO_SNDBUFFORCE	32
-#define SO_RCVBUFFORCE	33
-#define SO_KEEPALIVE	9
-#define SO_OOBINLINE	10
-#define SO_NO_CHECK	11
-#define SO_PRIORITY	12
-#define SO_LINGER	13
-#define SO_BSDCOMPAT	14
-#define SO_REUSEPORT	15
-#define SO_PASSCRED	16
-#define SO_PEERCRED	17
-#define SO_RCVLOWAT	18
-#define SO_SNDLOWAT	19
-#define SO_RCVTIMEO	20
-#define SO_SNDTIMEO	21
-
-/* Security levels - as per NRL IPv6 - don't actually do anything */
-
-#define SO_SECURITY_AUTHENTICATION		22
-#define SO_SECURITY_ENCRYPTION_TRANSPORT	23
-#define SO_SECURITY_ENCRYPTION_NETWORK		24
-
-#define SO_BINDTODEVICE	25
-
-/* Socket filtering */
-
-#define SO_ATTACH_FILTER        26
-#define SO_DETACH_FILTER        27
-#define SO_GET_FILTER		SO_ATTACH_FILTER
-
-#define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
-
-#define SO_ACCEPTCONN		30
-#define SO_PEERSEC		31
-#define SO_PASSSEC		34
-#define SO_TIMESTAMPNS		35
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
-
-#define SO_MARK			36
-
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
-#define SO_PROTOCOL		38
-#define SO_DOMAIN		39
-
-#define SO_RXQ_OVFL             40
-
-#define SO_WIFI_STATUS		41
-#define SCM_WIFI_STATUS		SO_WIFI_STATUS
-#define SO_PEEK_OFF		42
-
-/* Instruct lower device to use last 4-bytes of skb data as FCS */
-#define SO_NOFCS		43
-
-#define SO_LOCK_FILTER		44
-
-#define SO_SELECT_ERR_QUEUE	45
-
-#define SO_BUSY_POLL		46
-
-#define SO_MAX_PACING_RATE	47
-
-#define SO_BPF_EXTENSIONS	48
-
-#define SO_INCOMING_CPU		49
-
-#define SO_ATTACH_BPF		50
-#define SO_DETACH_BPF		SO_DETACH_FILTER
-
-#define SO_ATTACH_REUSEPORT_CBPF	51
-#define SO_ATTACH_REUSEPORT_EBPF	52
-
-#define SO_CNX_ADVICE		53
-
-#define SCM_TIMESTAMPING_OPT_STATS	54
-
-#define SO_MEMINFO		55
-
-#define SO_INCOMING_NAPI_ID	56
-
-#define SO_COOKIE		57
-
-#define SCM_TIMESTAMPING_PKTINFO	58
-
-#define SO_PEERGROUPS		59
-
-#define SO_ZEROCOPY		60
-
-#define SO_TXTIME		61
-#define SCM_TXTIME		SO_TXTIME
-
-#endif	/* _XTENSA_SOCKET_H */
-- 
2.17.1

[PATCH v3 2/8] sockopt: Rename SO_TIMESTAMP* to SO_TIMESTAMP*_OLD

[Deepa Dinamani]

SO_TIMESTAMP, SO_TIMESTAMPNS and SO_TIMESTAMPING options, the
way they are currently defined, are not y2038 safe.
Subsequent patches in the series add new y2038 safe versions
of these options which provide 64 bit timestamps on all
architectures uniformly.
Hence, rename existing options with OLD tag suffixes.

Also note that kernel will not use the untagged SO_TIMESTAMP*
and SCM_TIMESTAMP* options internally anymore.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: deller@gmx.de
Cc: dhowells@redhat.com
Cc: jejb@parisc-linux.org
Cc: ralf@linux-mips.org
Cc: rth@twiddle.net
Cc: linux-afs@lists.infradead.org
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-rdma@vger.kernel.org
Cc: sparclinux@vger.kernel.org
---
 arch/alpha/include/uapi/asm/socket.h  | 23 ++++++++++++++++-------
 arch/mips/include/uapi/asm/socket.h   | 23 ++++++++++++++++-------
 arch/parisc/include/uapi/asm/socket.h | 23 ++++++++++++++++-------
 arch/sparc/include/uapi/asm/socket.h  | 24 ++++++++++++++++--------
 include/uapi/asm-generic/socket.h     | 23 ++++++++++++++++-------
 net/compat.c                          |  6 +++---
 net/core/sock.c                       | 16 ++++++++--------
 net/ipv4/tcp.c                        |  6 +++---
 net/rds/af_rds.c                      |  2 +-
 net/rds/recv.c                        |  2 +-
 net/rxrpc/local_object.c              |  2 +-
 net/socket.c                          |  8 ++++----
 12 files changed, 101 insertions(+), 57 deletions(-)

diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 065fb372e355..00e45c80e574 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -51,13 +51,9 @@
 #define SO_GET_FILTER		SO_ATTACH_FILTER
 
 #define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
 
 #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
@@ -66,9 +62,6 @@
 
 #define SO_MARK			36
 
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
 #define SO_RXQ_OVFL             40
 
 #define SO_WIFI_STATUS		41
@@ -115,4 +108,20 @@
 #define SO_TXTIME		61
 #define SCM_TXTIME		SO_TXTIME
 
+#define SO_TIMESTAMP_OLD         29
+#define SO_TIMESTAMPNS_OLD       35
+#define SO_TIMESTAMPING_OLD      37
+
+#if !defined(__KERNEL__)
+
+#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
+
+#define SCM_TIMESTAMP          SO_TIMESTAMP
+#define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
+#define SCM_TIMESTAMPING       SO_TIMESTAMPING
+
+#endif
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index 71370fb3ceef..b9553f770346 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -65,21 +65,14 @@
 #define SO_GET_FILTER		SO_ATTACH_FILTER
 
 #define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
 
 #define SO_PEERSEC		30
 #define SO_SNDBUFFORCE		31
 #define SO_RCVBUFFORCE		33
 #define SO_PASSSEC		34
-#define SO_TIMESTAMPNS		35
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #define SO_MARK			36
 
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
 #define SO_RXQ_OVFL		40
 
 #define SO_WIFI_STATUS		41
@@ -126,4 +119,20 @@
 #define SO_TXTIME		61
 #define SCM_TXTIME		SO_TXTIME
 
+#define SO_TIMESTAMP_OLD         29
+#define SO_TIMESTAMPNS_OLD       35
+#define SO_TIMESTAMPING_OLD      37
+
+#if !defined(__KERNEL__)
+
+#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
+
+#define SCM_TIMESTAMP          SO_TIMESTAMP
+#define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
+#define SCM_TIMESTAMPING       SO_TIMESTAMPING
+
+#endif
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index 061b9cf2a779..37cdfe64bb27 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -34,10 +34,6 @@
 #define SO_BSDCOMPAT	0x400e
 #define SO_PASSCRED	0x4010
 #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
@@ -58,9 +54,6 @@
 
 #define SO_MARK			0x401f
 
-#define SO_TIMESTAMPING		0x4020
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
 #define SO_RXQ_OVFL             0x4021
 
 #define SO_WIFI_STATUS		0x4022
@@ -107,4 +100,20 @@
 #define SO_TXTIME		0x4036
 #define SCM_TXTIME		SO_TXTIME
 
+#define SO_TIMESTAMP_OLD         0x4012
+#define SO_TIMESTAMPNS_OLD       0x4013
+#define SO_TIMESTAMPING_OLD      0x4020
+
+#if !defined(__KERNEL__)
+
+#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
+
+#define SCM_TIMESTAMP          SO_TIMESTAMP
+#define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
+#define SCM_TIMESTAMPING       SO_TIMESTAMPING
+
+#endif
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index 7ea35e5601b6..ca573641fc6c 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -33,7 +33,6 @@
 #define SO_PROTOCOL	0x1028
 #define SO_DOMAIN	0x1029
 
-
 /* Linux specific, keep the same. */
 #define SO_NO_CHECK	0x000b
 #define SO_PRIORITY	0x000c
@@ -45,19 +44,12 @@
 #define SO_GET_FILTER		SO_ATTACH_FILTER
 
 #define SO_PEERNAME		0x001c
-#define SO_TIMESTAMP		0x001d
-#define SCM_TIMESTAMP		SO_TIMESTAMP
 
 #define SO_PEERSEC		0x001e
 #define SO_PASSSEC		0x001f
-#define SO_TIMESTAMPNS		0x0021
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #define SO_MARK			0x0022
 
-#define SO_TIMESTAMPING		0x0023
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
 #define SO_RXQ_OVFL             0x0024
 
 #define SO_WIFI_STATUS		0x0025
@@ -109,4 +101,20 @@
 #define SO_SECURITY_ENCRYPTION_TRANSPORT	0x5002
 #define SO_SECURITY_ENCRYPTION_NETWORK		0x5004
 
+#define SO_TIMESTAMP_OLD         0x001d
+#define SO_TIMESTAMPNS_OLD       0x0021
+#define SO_TIMESTAMPING_OLD      0x0023
+
+#if !defined(__KERNEL__)
+
+#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
+
+#define SCM_TIMESTAMP          SO_TIMESTAMP
+#define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
+#define SCM_TIMESTAMPING       SO_TIMESTAMPING
+
+#endif
+
 #endif /* _ASM_SOCKET_H */
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index a12692e5f7a8..dc704e41203d 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -46,21 +46,14 @@
 #define SO_GET_FILTER		SO_ATTACH_FILTER
 
 #define SO_PEERNAME		28
-#define SO_TIMESTAMP		29
-#define SCM_TIMESTAMP		SO_TIMESTAMP
 
 #define SO_ACCEPTCONN		30
 
 #define SO_PEERSEC		31
 #define SO_PASSSEC		34
-#define SO_TIMESTAMPNS		35
-#define SCM_TIMESTAMPNS		SO_TIMESTAMPNS
 
 #define SO_MARK			36
 
-#define SO_TIMESTAMPING		37
-#define SCM_TIMESTAMPING	SO_TIMESTAMPING
-
 #define SO_PROTOCOL		38
 #define SO_DOMAIN		39
 
@@ -110,4 +103,20 @@
 #define SO_TXTIME		61
 #define SCM_TXTIME		SO_TXTIME
 
+#define SO_TIMESTAMP_OLD         29
+#define SO_TIMESTAMPNS_OLD       35
+#define SO_TIMESTAMPING_OLD      37
+
+#if !defined(__KERNEL__)
+
+#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
+
+#define SCM_TIMESTAMP          SO_TIMESTAMP
+#define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
+#define SCM_TIMESTAMPING       SO_TIMESTAMPING
+
+#endif
+
 #endif /* __ASM_GENERIC_SOCKET_H */
diff --git a/net/compat.c b/net/compat.c
index c3a2f868e8af..ad24c1c0f0a1 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -219,7 +219,7 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
 	}
 
 	if (!COMPAT_USE_64BIT_TIME) {
-		if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
+		if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
 			struct timeval *tv = (struct timeval *)data;
 			ctv.tv_sec = tv->tv_sec;
 			ctv.tv_usec = tv->tv_usec;
@@ -227,8 +227,8 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
 			len = sizeof(ctv);
 		}
 		if (level == SOL_SOCKET &&
-		    (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
-			int count = type == SCM_TIMESTAMPNS ? 1 : 3;
+		    (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
+			int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
 			int i;
 			struct timespec *ts = (struct timespec *)data;
 			for (i = 0; i < count; i++) {
diff --git a/net/core/sock.c b/net/core/sock.c
index 6aa2e7e0b4fb..492a8407130a 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -815,10 +815,10 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 			clear_bit(SOCK_PASSCRED, &sock->flags);
 		break;
 
-	case SO_TIMESTAMP:
-	case SO_TIMESTAMPNS:
+	case SO_TIMESTAMP_OLD:
+	case SO_TIMESTAMPNS_OLD:
 		if (valbool)  {
-			if (optname == SO_TIMESTAMP)
+			if (optname == SO_TIMESTAMP_OLD)
 				sock_reset_flag(sk, SOCK_RCVTSTAMPNS);
 			else
 				sock_set_flag(sk, SOCK_RCVTSTAMPNS);
@@ -830,7 +830,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		}
 		break;
 
-	case SO_TIMESTAMPING:
+	case SO_TIMESTAMPING_OLD:
 		if (val & ~SOF_TIMESTAMPING_MASK) {
 			ret = -EINVAL;
 			break;
@@ -1186,16 +1186,16 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		sock_warn_obsolete_bsdism("getsockopt");
 		break;
 
-	case SO_TIMESTAMP:
+	case SO_TIMESTAMP_OLD:
 		v.val = sock_flag(sk, SOCK_RCVTSTAMP) &&
 				!sock_flag(sk, SOCK_RCVTSTAMPNS);
 		break;
 
-	case SO_TIMESTAMPNS:
+	case SO_TIMESTAMPNS_OLD:
 		v.val = sock_flag(sk, SOCK_RCVTSTAMPNS);
 		break;
 
-	case SO_TIMESTAMPING:
+	case SO_TIMESTAMPING_OLD:
 		v.val = sk->sk_tsflags;
 		break;
 
@@ -2122,7 +2122,7 @@ int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
 			return -EINVAL;
 		sockc->mark = *(u32 *)CMSG_DATA(cmsg);
 		break;
-	case SO_TIMESTAMPING:
+	case SO_TIMESTAMPING_OLD:
 		if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
 			return -EINVAL;
 
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 27e2f6837062..95eebe94ecf0 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1870,13 +1870,13 @@ static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 	if (tss->ts[0].tv_sec || tss->ts[0].tv_nsec) {
 		if (sock_flag(sk, SOCK_RCVTSTAMP)) {
 			if (sock_flag(sk, SOCK_RCVTSTAMPNS)) {
-				put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
 					 sizeof(tss->ts[0]), &tss->ts[0]);
 			} else {
 				tv.tv_sec = tss->ts[0].tv_sec;
 				tv.tv_usec = tss->ts[0].tv_nsec / 1000;
 
-				put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
 					 sizeof(tv), &tv);
 			}
 		}
@@ -1896,7 +1896,7 @@ static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 
 	if (has_timestamping) {
 		tss->ts[1] = (struct timespec) {0};
-		put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING,
+		put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_OLD,
 			 sizeof(*tss), tss);
 	}
 }
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 65387e1e6964..eeb4639adbe5 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -430,7 +430,7 @@ static int rds_setsockopt(struct socket *sock, int level, int optname,
 		ret = rds_set_transport(rs, optval, optlen);
 		release_sock(sock->sk);
 		break;
-	case SO_TIMESTAMP:
+	case SO_TIMESTAMP_OLD:
 		lock_sock(sock->sk);
 		ret = rds_enable_recvtstamp(sock->sk, optval, optlen);
 		release_sock(sock->sk);
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 727639dac8a7..04e30d63a159 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -550,7 +550,7 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
 	if ((inc->i_rx_tstamp != 0) &&
 	    sock_flag(rds_rs_to_sk(rs), SOCK_RCVTSTAMP)) {
 		struct timeval tv = ktime_to_timeval(inc->i_rx_tstamp);
-		ret = put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
+		ret = put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
 			       sizeof(tv), &tv);
 		if (ret)
 			goto out;
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 0906e51d3cfb..15cf42d5b53a 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -202,7 +202,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
 
 		/* We want receive timestamps. */
 		opt = 1;
-		ret = kernel_setsockopt(local->socket, SOL_SOCKET, SO_TIMESTAMPNS,
+		ret = kernel_setsockopt(local->socket, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
 					(char *)&opt, sizeof(opt));
 		if (ret < 0) {
 			_debug("setsockopt failed");
diff --git a/net/socket.c b/net/socket.c
index e89884e2197b..5087f9e40f3a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -669,7 +669,7 @@ static bool skb_is_err_queue(const struct sk_buff *skb)
  * before the software timestamp is received, a hardware TX timestamp may be
  * returned only if there is no software TX timestamp. Ignore false software
  * timestamps, which may be made in the __sock_recv_timestamp() call when the
- * option SO_TIMESTAMP(NS) is enabled on the socket, even when the skb has a
+ * option SO_TIMESTAMP_OLD(NS) is enabled on the socket, even when the skb has a
  * hardware timestamp.
  */
 static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp)
@@ -721,12 +721,12 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 		if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
 			struct timeval tv;
 			skb_get_timestamp(skb, &tv);
-			put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
+			put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
 				 sizeof(tv), &tv);
 		} else {
 			struct timespec ts;
 			skb_get_timestampns(skb, &ts);
-			put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
+			put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
 				 sizeof(ts), &ts);
 		}
 	}
@@ -746,7 +746,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 	}
 	if (!empty) {
 		put_cmsg(msg, SOL_SOCKET,
-			 SCM_TIMESTAMPING, sizeof(tss), &tss);
+			 SO_TIMESTAMPING_OLD, sizeof(tss), &tss);
 
 		if (skb_is_err_queue(skb) && skb->len &&
 		    SKB_EXT_ERR(skb)->opt_stats)
-- 
2.17.1

[PATCH v3 3/8] arch: sparc: Override struct __kernel_old_timeval

[Deepa Dinamani]

struct __kernel_old_timeval is supposed to have the same
layout as struct timeval. But, it was inadvarently missed
that __kernel_suseconds has a different definition for
sparc64.
Provide an asm-specific override that fixes it.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: sparclinux@vger.kernel.org
---
 arch/sparc/include/uapi/asm/posix_types.h | 10 ++++++++++
 include/uapi/linux/time.h                 |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/arch/sparc/include/uapi/asm/posix_types.h b/arch/sparc/include/uapi/asm/posix_types.h
index fec499d6efb7..f139e0048628 100644
--- a/arch/sparc/include/uapi/asm/posix_types.h
+++ b/arch/sparc/include/uapi/asm/posix_types.h
@@ -19,6 +19,16 @@ typedef unsigned short         __kernel_old_gid_t;
 typedef int		       __kernel_suseconds_t;
 #define __kernel_suseconds_t __kernel_suseconds_t
 
+typedef long		__kernel_long_t;
+typedef unsigned long	__kernel_ulong_t;
+#define __kernel_long_t __kernel_long_t
+
+struct __kernel_old_timeval {
+	__kernel_long_t tv_sec;
+	__kernel_suseconds_t tv_usec;
+};
+#define __kernel_old_timeval __kernel_old_timeval
+
 #else
 /* sparc 32 bit */
 
diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h
index 6b56a2208be7..04d5587f30d3 100644
--- a/include/uapi/linux/time.h
+++ b/include/uapi/linux/time.h
@@ -63,10 +63,12 @@ struct __kernel_itimerspec {
  * here, this is probably because it is not y2038 safe and needs to
  * be changed to use another interface.
  */
+#ifndef __kernel_old_timeval
 struct __kernel_old_timeval {
 	__kernel_long_t tv_sec;
 	__kernel_long_t tv_usec;
 };
+#endif
 
 /*
  * The IDs of the various system clocks (for POSIX.1b interval timers):
-- 
2.17.1

[PATCH v3 4/8] socket: Use old_timeval types for socket timestamps

[Deepa Dinamani]

As part of y2038 solution, all internal uses of
struct timeval are replaced by struct __kernel_old_timeval
and struct compat_timeval by struct old_timeval32.
Make socket timestamps use these new types.

This is mainly to be able to verify that the kernel build
is y2038 safe when such non y2038 safe types are not
supported anymore.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: isdn@linux-pingi.de
---
 drivers/isdn/mISDN/socket.c | 2 +-
 include/linux/skbuff.h      | 6 +++---
 net/bluetooth/hci_sock.c    | 4 ++--
 net/compat.c                | 8 ++++----
 net/ipv4/tcp.c              | 2 +-
 net/rds/recv.c              | 2 +-
 net/socket.c                | 2 +-
 7 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 15d3ca37669a..4ab8b1b6608f 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -103,7 +103,7 @@ mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
 static inline void
 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
 {
-	struct timeval	tv;
+	struct __kernel_old_timeval	tv;
 
 	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
 		skb_get_timestamp(skb, &tv);
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 93f56fddd92a..85f6226d106f 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3480,16 +3480,16 @@ static inline ktime_t skb_get_ktime(const struct sk_buff *skb)
 /**
  *	skb_get_timestamp - get timestamp from a skb
  *	@skb: skb to get stamp from
- *	@stamp: pointer to struct timeval to store stamp in
+ *	@stamp: pointer to struct __kernel_old_timeval to store stamp in
  *
  *	Timestamps are stored in the skb as offsets to a base timestamp.
  *	This function converts the offset back to a struct timeval and stores
  *	it in stamp.
  */
 static inline void skb_get_timestamp(const struct sk_buff *skb,
-				     struct timeval *stamp)
+				     struct __kernel_old_timeval *stamp)
 {
-	*stamp = ktime_to_timeval(skb->tstamp);
+	*stamp = ns_to_kernel_old_timeval(skb->tstamp);
 }
 
 static inline void skb_get_timestampns(const struct sk_buff *skb,
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1506e1632394..65228bfa4487 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -1383,9 +1383,9 @@ static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
 
 	if (mask & HCI_CMSG_TSTAMP) {
 #ifdef CONFIG_COMPAT
-		struct compat_timeval ctv;
+		struct old_timeval32 ctv;
 #endif
-		struct timeval tv;
+		struct __kernel_old_timeval tv;
 		void *data;
 		int len;
 
diff --git a/net/compat.c b/net/compat.c
index ad24c1c0f0a1..b6ff0899e424 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -209,8 +209,8 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
 {
 	struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
 	struct compat_cmsghdr cmhdr;
-	struct compat_timeval ctv;
-	struct compat_timespec cts[3];
+	struct old_timeval32 ctv;
+	struct old_timespec32 cts[3];
 	int cmlen;
 
 	if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
@@ -220,7 +220,7 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
 
 	if (!COMPAT_USE_64BIT_TIME) {
 		if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
-			struct timeval *tv = (struct timeval *)data;
+			struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
 			ctv.tv_sec = tv->tv_sec;
 			ctv.tv_usec = tv->tv_usec;
 			data = &ctv;
@@ -425,7 +425,7 @@ static int do_get_sock_timeout(struct socket *sock, int level, int optname,
 	mm_segment_t old_fs;
 	int len, err;
 
-	up = (struct compat_timeval __user *) optval;
+	up = (struct compat_timeval __user *)optval;
 	if (get_user(len, optlen))
 		return -EFAULT;
 	if (len < sizeof(*up))
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 95eebe94ecf0..e6e2ea0ac0f4 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1864,7 +1864,7 @@ static void tcp_update_recv_tstamps(struct sk_buff *skb,
 static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 			       struct scm_timestamping *tss)
 {
-	struct timeval tv;
+	struct __kernel_old_timeval tv;
 	bool has_timestamping = false;
 
 	if (tss->ts[0].tv_sec || tss->ts[0].tv_nsec) {
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 04e30d63a159..435bf2320cd3 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -549,7 +549,7 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
 
 	if ((inc->i_rx_tstamp != 0) &&
 	    sock_flag(rds_rs_to_sk(rs), SOCK_RCVTSTAMP)) {
-		struct timeval tv = ktime_to_timeval(inc->i_rx_tstamp);
+		struct __kernel_old_timeval tv = ns_to_kernel_old_timeval(inc->i_rx_tstamp);
 		ret = put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
 			       sizeof(tv), &tv);
 		if (ret)
diff --git a/net/socket.c b/net/socket.c
index 5087f9e40f3a..9cc281cdb9d9 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -719,7 +719,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 
 	if (need_software_tstamp) {
 		if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
-			struct timeval tv;
+			struct __kernel_old_timeval tv;
 			skb_get_timestamp(skb, &tv);
 			put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
 				 sizeof(tv), &tv);
-- 
2.17.1

[PATCH v3 5/8] socket: Add struct __kernel_sock_timeval

[Deepa Dinamani]

The new type is meant to be used as a y2038 safe structure
to be used as part of cmsg data.
Presently the SO_TIMESTAMP socket option uses struct timeval
for timestamps. This is not y2038 safe.
Subsequent patches in the series add new y2038 safe socket
option to be used in the place of SO_TIMESTAMP_OLD.
struct __kernel_sock_timeval will be used as the timestamp
format at that time.

struct __kernel_sock_timeval also maintains the same layout
across 32 bit and 64 bit ABIs.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
---
 include/uapi/linux/time.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h
index 04d5587f30d3..b8ad1b86b942 100644
--- a/include/uapi/linux/time.h
+++ b/include/uapi/linux/time.h
@@ -70,6 +70,11 @@ struct __kernel_old_timeval {
 };
 #endif
 
+struct __kernel_sock_timeval {
+	__s64 tv_sec;
+	__s64 tv_usec;
+};
+
 /*
  * The IDs of the various system clocks (for POSIX.1b interval timers):
  */
-- 
2.17.1

[PATCH v3 6/8] socket: Add SO_TIMESTAMP[NS]_NEW

[Deepa Dinamani]

Add SO_TIMESTAMP_NEW and SO_TIMESTAMPNS_NEW variants of
socket timestamp options.
These are the y2038 safe versions of the SO_TIMESTAMP_OLD
and SO_TIMESTAMPNS_OLD for all architectures.

Note that the format of scm_timestamping.ts[0] is not changed
in this patch.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: jejb@parisc-linux.org
Cc: ralf@linux-mips.org
Cc: rth@twiddle.net
Cc: linux-alpha@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-rdma@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: sparclinux@vger.kernel.org
---
 arch/alpha/include/uapi/asm/socket.h  | 15 ++++++++++--
 arch/mips/include/uapi/asm/socket.h   | 14 +++++++++--
 arch/parisc/include/uapi/asm/socket.h | 14 +++++++++--
 arch/sparc/include/uapi/asm/socket.h  | 14 +++++++++--
 include/linux/skbuff.h                | 18 ++++++++++++++
 include/net/sock.h                    |  1 +
 include/uapi/asm-generic/socket.h     | 15 ++++++++++--
 net/core/sock.c                       | 21 ++++++++++++++--
 net/ipv4/tcp.c                        | 35 +++++++++++++++++++++------
 net/rds/af_rds.c                      |  8 ++++--
 net/rds/recv.c                        | 16 ++++++++++--
 net/socket.c                          | 35 +++++++++++++++++++++------
 12 files changed, 174 insertions(+), 32 deletions(-)

diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 00e45c80e574..352e3dc0b3d9 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -3,6 +3,7 @@
 #define _UAPI_ASM_SOCKET_H
 
 #include <asm/sockios.h>
+#include <asm/bitsperlong.h>
 
 /* For setsockopt(2) */
 /*
@@ -110,12 +111,22 @@
 
 #define SO_TIMESTAMP_OLD         29
 #define SO_TIMESTAMPNS_OLD       35
+
 #define SO_TIMESTAMPING_OLD      37
 
+#define SO_TIMESTAMP_NEW         62
+#define SO_TIMESTAMPNS_NEW       63
+
 #if !defined(__KERNEL__)
 
-#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
-#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#if __BITS_PER_LONG == 64
+#define SO_TIMESTAMP		SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#else
+#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
+#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#endif
+
 #define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index b9553f770346..d1752e3f1248 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -11,6 +11,7 @@
 #define _UAPI_ASM_SOCKET_H
 
 #include <asm/sockios.h>
+#include <asm/bitsperlong.h>
 
 /*
  * For setsockopt(2)
@@ -123,10 +124,19 @@
 #define SO_TIMESTAMPNS_OLD       35
 #define SO_TIMESTAMPING_OLD      37
 
+#define SO_TIMESTAMP_NEW         62
+#define SO_TIMESTAMPNS_NEW       63
+
 #if !defined(__KERNEL__)
 
-#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
-#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#if __BITS_PER_LONG == 64
+#define SO_TIMESTAMP		SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#else
+#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
+#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#endif
+
 #define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index 37cdfe64bb27..0a45b668abd1 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -3,6 +3,7 @@
 #define _UAPI_ASM_SOCKET_H
 
 #include <asm/sockios.h>
+#include <asm/bitsperlong.h>
 
 /* For setsockopt(2) */
 #define SOL_SOCKET	0xffff
@@ -104,10 +105,19 @@
 #define SO_TIMESTAMPNS_OLD       0x4013
 #define SO_TIMESTAMPING_OLD      0x4020
 
+#define SO_TIMESTAMP_NEW         0x4037
+#define SO_TIMESTAMPNS_NEW       0x4038
+
 #if !defined(__KERNEL__)
 
-#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
-#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#if __BITS_PER_LONG == 64
+#define SO_TIMESTAMP		SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#else
+#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
+#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#endif
+
 #define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index ca573641fc6c..dc8527cae5a7 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -3,6 +3,7 @@
 #define _ASM_SOCKET_H
 
 #include <asm/sockios.h>
+#include <asm/bitsperlong.h>
 
 /* For setsockopt(2) */
 #define SOL_SOCKET	0xffff
@@ -105,10 +106,19 @@
 #define SO_TIMESTAMPNS_OLD       0x0021
 #define SO_TIMESTAMPING_OLD      0x0023
 
+#define SO_TIMESTAMP_NEW         0x0040
+#define SO_TIMESTAMPNS_NEW       0x0041
+
 #if !defined(__KERNEL__)
 
-#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
-#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#if __BITS_PER_LONG == 64
+#define SO_TIMESTAMP		SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#else
+#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
+#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#endif
+
 #define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 85f6226d106f..31c45d4f3896 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3492,12 +3492,30 @@ static inline void skb_get_timestamp(const struct sk_buff *skb,
 	*stamp = ns_to_kernel_old_timeval(skb->tstamp);
 }
 
+static inline void skb_get_new_timestamp(const struct sk_buff *skb,
+					 struct __kernel_sock_timeval *stamp)
+{
+	struct timespec64 ts = ktime_to_timespec64(skb->tstamp);
+
+	stamp->tv_sec = ts.tv_sec;
+	stamp->tv_usec = ts.tv_nsec / 1000;
+}
+
 static inline void skb_get_timestampns(const struct sk_buff *skb,
 				       struct timespec *stamp)
 {
 	*stamp = ktime_to_timespec(skb->tstamp);
 }
 
+static inline void skb_get_new_timestampns(const struct sk_buff *skb,
+					   struct __kernel_timespec *stamp)
+{
+	struct timespec64 ts = ktime_to_timespec64(skb->tstamp);
+
+	stamp->tv_sec = ts.tv_sec;
+	stamp->tv_nsec = ts.tv_nsec;
+}
+
 static inline void __net_timestamp(struct sk_buff *skb)
 {
 	skb->tstamp = ktime_get_real();
diff --git a/include/net/sock.h b/include/net/sock.h
index 2b229f7be8eb..6679f3c120b0 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -805,6 +805,7 @@ enum sock_flags {
 	SOCK_RCU_FREE, /* wait rcu grace period in sk_destruct() */
 	SOCK_TXTIME,
 	SOCK_XDP, /* XDP is attached */
+	SOCK_TSTAMP_NEW, /* Indicates 64 bit timestamps always */
 };
 
 #define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index dc704e41203d..0b0fae6b57a9 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -3,6 +3,7 @@
 #define __ASM_GENERIC_SOCKET_H
 
 #include <asm/sockios.h>
+#include <asm/bitsperlong.h>
 
 /* For setsockopt(2) */
 #define SOL_SOCKET	1
@@ -107,10 +108,20 @@
 #define SO_TIMESTAMPNS_OLD       35
 #define SO_TIMESTAMPING_OLD      37
 
+#define SO_TIMESTAMP_NEW         62
+#define SO_TIMESTAMPNS_NEW       63
+
 #if !defined(__KERNEL__)
 
-#define SO_TIMESTAMP           SO_TIMESTAMP_OLD
-#define SO_TIMESTAMPNS         SO_TIMESTAMPNS_OLD
+#if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__))
+/* on 64-bit and x32, avoid the ?: operator */
+#define SO_TIMESTAMP		SO_TIMESTAMP_OLD
+#define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#else
+#define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
+#define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#endif
+
 #define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
diff --git a/net/core/sock.c b/net/core/sock.c
index 492a8407130a..35c7cd9b2793 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -816,9 +816,16 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_TIMESTAMP_OLD:
+	case SO_TIMESTAMP_NEW:
 	case SO_TIMESTAMPNS_OLD:
+	case SO_TIMESTAMPNS_NEW:
 		if (valbool)  {
-			if (optname == SO_TIMESTAMP_OLD)
+			if (optname == SO_TIMESTAMP_NEW || optname == SO_TIMESTAMPNS_NEW)
+				sock_set_flag(sk, SOCK_TSTAMP_NEW);
+			else
+				sock_reset_flag(sk, SOCK_TSTAMP_NEW);
+
+			if (optname == SO_TIMESTAMP_OLD || optname == SO_TIMESTAMP_NEW)
 				sock_reset_flag(sk, SOCK_RCVTSTAMPNS);
 			else
 				sock_set_flag(sk, SOCK_RCVTSTAMPNS);
@@ -827,6 +834,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		} else {
 			sock_reset_flag(sk, SOCK_RCVTSTAMP);
 			sock_reset_flag(sk, SOCK_RCVTSTAMPNS);
+			sock_reset_flag(sk, SOCK_TSTAMP_NEW);
 		}
 		break;
 
@@ -1188,11 +1196,20 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 
 	case SO_TIMESTAMP_OLD:
 		v.val = sock_flag(sk, SOCK_RCVTSTAMP) &&
+				!sock_flag(sk, SOCK_TSTAMP_NEW) &&
 				!sock_flag(sk, SOCK_RCVTSTAMPNS);
 		break;
 
 	case SO_TIMESTAMPNS_OLD:
-		v.val = sock_flag(sk, SOCK_RCVTSTAMPNS);
+		v.val = sock_flag(sk, SOCK_RCVTSTAMPNS) && !sock_flag(sk, SOCK_TSTAMP_NEW);
+		break;
+
+	case SO_TIMESTAMP_NEW:
+		v.val = sock_flag(sk, SOCK_RCVTSTAMP) && sock_flag(sk, SOCK_TSTAMP_NEW);
+		break;
+
+	case SO_TIMESTAMPNS_NEW:
+		v.val = sock_flag(sk, SOCK_RCVTSTAMPNS) && sock_flag(sk, SOCK_TSTAMP_NEW);
 		break;
 
 	case SO_TIMESTAMPING_OLD:
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index e6e2ea0ac0f4..44fe307af09c 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1864,20 +1864,39 @@ static void tcp_update_recv_tstamps(struct sk_buff *skb,
 static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 			       struct scm_timestamping *tss)
 {
-	struct __kernel_old_timeval tv;
 	bool has_timestamping = false;
+	int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
 
 	if (tss->ts[0].tv_sec || tss->ts[0].tv_nsec) {
 		if (sock_flag(sk, SOCK_RCVTSTAMP)) {
 			if (sock_flag(sk, SOCK_RCVTSTAMPNS)) {
-				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
-					 sizeof(tss->ts[0]), &tss->ts[0]);
-			} else {
-				tv.tv_sec = tss->ts[0].tv_sec;
-				tv.tv_usec = tss->ts[0].tv_nsec / 1000;
+				if (new_tstamp) {
+					struct __kernel_timespec kts = {tss->ts[0].tv_sec, tss->ts[0].tv_nsec};
+
+					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW,
+						 sizeof(kts), &kts);
+				} else {
+					struct timespec ts_old = tss->ts[0];
 
-				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
-					 sizeof(tv), &tv);
+					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
+						 sizeof(ts_old), &ts_old);
+				}
+			} else {
+				if (new_tstamp) {
+					struct __kernel_sock_timeval stv;
+
+					stv.tv_sec = tss->ts[0].tv_sec;
+					stv.tv_usec = tss->ts[0].tv_nsec / 1000;
+					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW,
+						 sizeof(stv), &stv);
+				} else {
+					struct __kernel_old_timeval tv;
+
+					tv.tv_sec = tss->ts[0].tv_sec;
+					tv.tv_usec = tss->ts[0].tv_nsec / 1000;
+					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
+						 sizeof(tv), &tv);
+				}
 			}
 		}
 
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index eeb4639adbe5..65571a6273c3 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -348,7 +348,7 @@ static int rds_set_transport(struct rds_sock *rs, char __user *optval,
 }
 
 static int rds_enable_recvtstamp(struct sock *sk, char __user *optval,
-				 int optlen)
+				 int optlen, int optname)
 {
 	int val, valbool;
 
@@ -360,6 +360,9 @@ static int rds_enable_recvtstamp(struct sock *sk, char __user *optval,
 
 	valbool = val ? 1 : 0;
 
+	if (optname == SO_TIMESTAMP_NEW)
+		sock_set_flag(sk, SOCK_TSTAMP_NEW);
+
 	if (valbool)
 		sock_set_flag(sk, SOCK_RCVTSTAMP);
 	else
@@ -431,8 +434,9 @@ static int rds_setsockopt(struct socket *sock, int level, int optname,
 		release_sock(sock->sk);
 		break;
 	case SO_TIMESTAMP_OLD:
+	case SO_TIMESTAMP_NEW:
 		lock_sock(sock->sk);
-		ret = rds_enable_recvtstamp(sock->sk, optval, optlen);
+		ret = rds_enable_recvtstamp(sock->sk, optval, optlen, optname);
 		release_sock(sock->sk);
 		break;
 	case SO_RDS_MSG_RXPATH_LATENCY:
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 435bf2320cd3..6bb6b16ca270 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -550,8 +550,20 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
 	if ((inc->i_rx_tstamp != 0) &&
 	    sock_flag(rds_rs_to_sk(rs), SOCK_RCVTSTAMP)) {
 		struct __kernel_old_timeval tv = ns_to_kernel_old_timeval(inc->i_rx_tstamp);
-		ret = put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
-			       sizeof(tv), &tv);
+
+		if (!sock_flag(rds_rs_to_sk(rs), SOCK_TSTAMP_NEW)) {
+			ret = put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
+				       sizeof(tv), &tv);
+		} else {
+			struct __kernel_sock_timeval sk_tv;
+
+			sk_tv.tv_sec = tv.tv_sec;
+			sk_tv.tv_usec = tv.tv_usec;
+
+			ret = put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW,
+				       sizeof(sk_tv), &sk_tv);
+		}
+
 		if (ret)
 			goto out;
 	}
diff --git a/net/socket.c b/net/socket.c
index 9cc281cdb9d9..1de96abd78d3 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -705,6 +705,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 	struct sk_buff *skb)
 {
 	int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
+	int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
 	struct scm_timestamping tss;
 	int empty = 1, false_tstamp = 0;
 	struct skb_shared_hwtstamps *shhwtstamps =
@@ -719,15 +720,33 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 
 	if (need_software_tstamp) {
 		if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
-			struct __kernel_old_timeval tv;
-			skb_get_timestamp(skb, &tv);
-			put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
-				 sizeof(tv), &tv);
+			if (new_tstamp) {
+				struct __kernel_sock_timeval tv;
+
+				skb_get_new_timestamp(skb, &tv);
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_NEW,
+					 sizeof(tv), &tv);
+			} else {
+				struct __kernel_old_timeval tv;
+
+				skb_get_timestamp(skb, &tv);
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMP_OLD,
+					 sizeof(tv), &tv);
+			}
 		} else {
-			struct timespec ts;
-			skb_get_timestampns(skb, &ts);
-			put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
-				 sizeof(ts), &ts);
+			if (new_tstamp) {
+				struct __kernel_timespec ts;
+
+				skb_get_new_timestampns(skb, &ts);
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW,
+					 sizeof(ts), &ts);
+			} else {
+				struct timespec ts;
+
+				skb_get_timestampns(skb, &ts);
+				put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
+					 sizeof(ts), &ts);
+			}
 		}
 	}
 
-- 
2.17.1

[PATCH v3 7/8] socket: Add SO_TIMESTAMPING_NEW

[Deepa Dinamani]

Add SO_TIMESTAMPING_NEW variant of socket timestamp options.
This is the y2038 safe versions of the SO_TIMESTAMPING_OLD
for all architectures.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: chris@zankel.net
Cc: fenghua.yu@intel.com
Cc: rth@twiddle.net
Cc: tglx@linutronix.de
Cc: ubraun@linux.ibm.com
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-s390@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: sparclinux@vger.kernel.org
---
 arch/alpha/include/uapi/asm/socket.h  |  5 +++--
 arch/mips/include/uapi/asm/socket.h   |  5 +++--
 arch/parisc/include/uapi/asm/socket.h |  5 +++--
 arch/sparc/include/uapi/asm/socket.h  |  8 +++++---
 include/linux/socket.h                |  8 ++++++++
 include/uapi/asm-generic/socket.h     |  5 +++--
 include/uapi/linux/errqueue.h         |  4 ++++
 net/core/scm.c                        | 27 ++++++++++++++++++++++++++
 net/core/sock.c                       |  8 +++++++-
 net/ipv4/tcp.c                        | 28 ++++++++++++++-------------
 net/smc/af_smc.c                      |  3 ++-
 net/socket.c                          | 13 ++++++++-----
 12 files changed, 88 insertions(+), 31 deletions(-)

diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 352e3dc0b3d9..da08412bd49f 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -116,19 +116,20 @@
 
 #define SO_TIMESTAMP_NEW         62
 #define SO_TIMESTAMPNS_NEW       63
+#define SO_TIMESTAMPING_NEW      64
 
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64
 #define SO_TIMESTAMP		SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING	SO_TIMESTAMPING_OLD
 #else
 #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
 #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
 #endif
 
-#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
-
 #define SCM_TIMESTAMP          SO_TIMESTAMP
 #define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
 #define SCM_TIMESTAMPING       SO_TIMESTAMPING
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index d1752e3f1248..1e48f67f1052 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -126,19 +126,20 @@
 
 #define SO_TIMESTAMP_NEW         62
 #define SO_TIMESTAMPNS_NEW       63
+#define SO_TIMESTAMPING_NEW      64
 
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64
 #define SO_TIMESTAMP		SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING	SO_TIMESTAMPING_OLD
 #else
 #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
 #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
 #endif
 
-#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
-
 #define SCM_TIMESTAMP          SO_TIMESTAMP
 #define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
 #define SCM_TIMESTAMPING       SO_TIMESTAMPING
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index 0a45b668abd1..e8d6cf20f9a4 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -107,19 +107,20 @@
 
 #define SO_TIMESTAMP_NEW         0x4037
 #define SO_TIMESTAMPNS_NEW       0x4038
+#define SO_TIMESTAMPING_NEW      0x4039
 
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64
 #define SO_TIMESTAMP		SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING	SO_TIMESTAMPING_OLD
 #else
 #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
 #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
 #endif
 
-#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
-
 #define SCM_TIMESTAMP          SO_TIMESTAMP
 #define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
 #define SCM_TIMESTAMPING       SO_TIMESTAMPING
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index dc8527cae5a7..fc65bf6b6440 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -106,20 +106,22 @@
 #define SO_TIMESTAMPNS_OLD       0x0021
 #define SO_TIMESTAMPING_OLD      0x0023
 
-#define SO_TIMESTAMP_NEW         0x0040
-#define SO_TIMESTAMPNS_NEW       0x0041
+#define SO_TIMESTAMP_NEW         0x0041
+#define SO_TIMESTAMPNS_NEW       0x0042
+#define SO_TIMESTAMPING_NEW      0x0043
 
 #if !defined(__KERNEL__)
 
 #if __BITS_PER_LONG == 64
 #define SO_TIMESTAMP		SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING	SO_TIMESTAMPING_OLD
 #else
 #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
 #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
 #endif
 
-#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
 
 #define SCM_TIMESTAMP          SO_TIMESTAMP
 #define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
diff --git a/include/linux/socket.h b/include/linux/socket.h
index ab2041a00e01..a47e60a1cfdf 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -351,6 +351,14 @@ extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
 
 struct __kernel_timespec;
 struct old_timespec32;
+struct timespec64;
+
+struct scm_timestamping_internal {
+	struct timespec64 ts[3];
+};
+
+extern void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss);
+extern void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss);
 
 /* The __sys_...msg variants allow MSG_CMSG_COMPAT iff
  * forbid_cmsg_compat==false
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index 0b0fae6b57a9..94e618a4a43f 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -110,6 +110,7 @@
 
 #define SO_TIMESTAMP_NEW         62
 #define SO_TIMESTAMPNS_NEW       63
+#define SO_TIMESTAMPING_NEW      64
 
 #if !defined(__KERNEL__)
 
@@ -117,13 +118,13 @@
 /* on 64-bit and x32, avoid the ?: operator */
 #define SO_TIMESTAMP		SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS		SO_TIMESTAMPNS_OLD
+#define SO_TIMESTAMPING	SO_TIMESTAMPING_OLD
 #else
 #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW)
 #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW)
+#define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW)
 #endif
 
-#define SO_TIMESTAMPING        SO_TIMESTAMPING_OLD
-
 #define SCM_TIMESTAMP          SO_TIMESTAMP
 #define SCM_TIMESTAMPNS        SO_TIMESTAMPNS
 #define SCM_TIMESTAMPING       SO_TIMESTAMPING
diff --git a/include/uapi/linux/errqueue.h b/include/uapi/linux/errqueue.h
index c0151200f7d1..d955b9e32288 100644
--- a/include/uapi/linux/errqueue.h
+++ b/include/uapi/linux/errqueue.h
@@ -41,6 +41,10 @@ struct scm_timestamping {
 	struct timespec ts[3];
 };
 
+struct scm_timestamping64 {
+	struct __kernel_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].
diff --git a/net/core/scm.c b/net/core/scm.c
index b1ff8a441748..52ef219cf6df 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -29,6 +29,7 @@
 #include <linux/pid.h>
 #include <linux/nsproxy.h>
 #include <linux/slab.h>
+#include <linux/errqueue.h>
 
 #include <linux/uaccess.h>
 
@@ -252,6 +253,32 @@ int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)
 }
 EXPORT_SYMBOL(put_cmsg);
 
+void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss_internal)
+{
+	struct scm_timestamping64 tss;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tss.ts); i++) {
+		tss.ts[i].tv_sec = tss_internal->ts[i].tv_sec;
+		tss.ts[i].tv_nsec = tss_internal->ts[i].tv_nsec;
+	}
+
+	put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_NEW, sizeof(tss), &tss);
+}
+EXPORT_SYMBOL(put_cmsg_scm_timestamping64);
+
+void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss_internal)
+{
+	struct scm_timestamping tss;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(tss.ts); i++)
+		tss.ts[i] = timespec64_to_timespec(tss_internal->ts[i]);
+
+	put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_OLD, sizeof(tss), &tss);
+}
+EXPORT_SYMBOL(put_cmsg_scm_timestamping);
+
 void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
 {
 	struct cmsghdr __user *cm
diff --git a/net/core/sock.c b/net/core/sock.c
index 35c7cd9b2793..78df5228ffbd 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -838,6 +838,8 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		}
 		break;
 
+	case SO_TIMESTAMPING_NEW:
+		sock_set_flag(sk, SOCK_TSTAMP_NEW);
 	case SO_TIMESTAMPING_OLD:
 		if (val & ~SOF_TIMESTAMPING_MASK) {
 			ret = -EINVAL;
@@ -869,9 +871,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		if (val & SOF_TIMESTAMPING_RX_SOFTWARE)
 			sock_enable_timestamp(sk,
 					      SOCK_TIMESTAMPING_RX_SOFTWARE);
-		else
+		else {
+			if (optname == SO_TIMESTAMPING_NEW)
+				sock_reset_flag(sk, SOCK_TSTAMP_NEW);
+
 			sock_disable_timestamp(sk,
 					       (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE));
+		}
 		break;
 
 	case SO_RCVLOWAT:
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 44fe307af09c..9cdd3d72aecd 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1847,22 +1847,22 @@ static int tcp_zerocopy_receive(struct sock *sk,
 #endif
 
 static void tcp_update_recv_tstamps(struct sk_buff *skb,
-				    struct scm_timestamping *tss)
+				    struct scm_timestamping_internal *tss)
 {
 	if (skb->tstamp)
-		tss->ts[0] = ktime_to_timespec(skb->tstamp);
+		tss->ts[0] = ktime_to_timespec64(skb->tstamp);
 	else
-		tss->ts[0] = (struct timespec) {0};
+		tss->ts[0] = (struct timespec64) {0};
 
 	if (skb_hwtstamps(skb)->hwtstamp)
-		tss->ts[2] = ktime_to_timespec(skb_hwtstamps(skb)->hwtstamp);
+		tss->ts[2] = ktime_to_timespec64(skb_hwtstamps(skb)->hwtstamp);
 	else
-		tss->ts[2] = (struct timespec) {0};
+		tss->ts[2] = (struct timespec64) {0};
 }
 
 /* Similar to __sock_recv_timestamp, but does not require an skb */
 static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
-			       struct scm_timestamping *tss)
+			       struct scm_timestamping_internal *tss)
 {
 	bool has_timestamping = false;
 	int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
@@ -1876,7 +1876,7 @@ static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW,
 						 sizeof(kts), &kts);
 				} else {
-					struct timespec ts_old = tss->ts[0];
+					struct timespec ts_old = timespec64_to_timespec(tss->ts[0]);
 
 					put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
 						 sizeof(ts_old), &ts_old);
@@ -1903,20 +1903,22 @@ static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
 		if (sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE)
 			has_timestamping = true;
 		else
-			tss->ts[0] = (struct timespec) {0};
+			tss->ts[0] = (struct timespec64) {0};
 	}
 
 	if (tss->ts[2].tv_sec || tss->ts[2].tv_nsec) {
 		if (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE)
 			has_timestamping = true;
 		else
-			tss->ts[2] = (struct timespec) {0};
+			tss->ts[2] = (struct timespec64) {0};
 	}
 
 	if (has_timestamping) {
-		tss->ts[1] = (struct timespec) {0};
-		put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_OLD,
-			 sizeof(*tss), tss);
+		tss->ts[1] = (struct timespec64) {0};
+		if (sock_flag(sk, SOCK_TSTAMP_NEW))
+			put_cmsg_scm_timestamping64(msg, tss);
+		else
+			put_cmsg_scm_timestamping(msg, tss);
 	}
 }
 
@@ -1957,7 +1959,7 @@ int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
 	long timeo;
 	struct sk_buff *skb, *last;
 	u32 urg_hole = 0;
-	struct scm_timestamping tss;
+	struct scm_timestamping_internal tss;
 	bool has_tss = false;
 	bool has_cmsg;
 
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index c4da4a78d369..c1ce35d36eef 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -289,7 +289,8 @@ static void smc_copy_sock_settings(struct sock *nsk, struct sock *osk,
 			     (1UL << SOCK_RXQ_OVFL) | \
 			     (1UL << SOCK_WIFI_STATUS) | \
 			     (1UL << SOCK_NOFCS) | \
-			     (1UL << SOCK_FILTER_LOCKED))
+			     (1UL << SOCK_FILTER_LOCKED) | \
+			     (1UL << SOCK_TSTAMP_NEW))
 /* copy only relevant settings and flags of SOL_SOCKET level from smc to
  * clc socket (since smc is not called for these options from net/core)
  */
diff --git a/net/socket.c b/net/socket.c
index 1de96abd78d3..d51930689b98 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -706,7 +706,8 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 {
 	int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
 	int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
-	struct scm_timestamping tss;
+	struct scm_timestamping_internal tss;
+
 	int empty = 1, false_tstamp = 0;
 	struct skb_shared_hwtstamps *shhwtstamps =
 		skb_hwtstamps(skb);
@@ -752,20 +753,22 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
 
 	memset(&tss, 0, sizeof(tss));
 	if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) &&
-	    ktime_to_timespec_cond(skb->tstamp, tss.ts + 0))
+	    ktime_to_timespec64_cond(skb->tstamp, tss.ts + 0))
 		empty = 0;
 	if (shhwtstamps &&
 	    (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) &&
 	    !skb_is_swtx_tstamp(skb, false_tstamp) &&
-	    ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) {
+	    ktime_to_timespec64_cond(shhwtstamps->hwtstamp, tss.ts + 2)) {
 		empty = 0;
 		if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) &&
 		    !skb_is_err_queue(skb))
 			put_ts_pktinfo(msg, skb);
 	}
 	if (!empty) {
-		put_cmsg(msg, SOL_SOCKET,
-			 SO_TIMESTAMPING_OLD, sizeof(tss), &tss);
+		if (sock_flag(sk, SOCK_TSTAMP_NEW))
+			put_cmsg_scm_timestamping64(msg, &tss);
+		else
+			put_cmsg_scm_timestamping(msg, &tss);
 
 		if (skb_is_err_queue(skb) && skb->len &&
 		    SKB_EXT_ERR(skb)->opt_stats)
-- 
2.17.1

[PATCH v3 8/8] socket: Update timestamping Documentation

[Deepa Dinamani]

With the new y2038 safe timestamping options added, update the
documentation to reflect the changes.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
---
 Documentation/networking/timestamping.txt | 43 ++++++++++++++++++++---
 1 file changed, 38 insertions(+), 5 deletions(-)

diff --git a/Documentation/networking/timestamping.txt b/Documentation/networking/timestamping.txt
index 1be0b6f9e0cb..67e4ab3cdb86 100644
--- a/Documentation/networking/timestamping.txt
+++ b/Documentation/networking/timestamping.txt
@@ -6,11 +6,21 @@ The interfaces for receiving network packages timestamps are:
 * SO_TIMESTAMP
   Generates a timestamp for each incoming packet in (not necessarily
   monotonic) system time. Reports the timestamp via recvmsg() in a
-  control message as struct timeval (usec resolution).
+  control message in usec resolution.
+  SO_TIMESTAMP is defined as SO_TIMESTAMP_NEW or SO_TIMESTAMP_OLD
+  based on the architecture type and time_t representation of libc.
+  Control message format is in struct __kernel_old_timeval for
+  SO_TIMESTAMP_OLD and in struct __kernel_sock_timeval for
+  SO_TIMESTAMP_NEW options respectively.
 
 * SO_TIMESTAMPNS
   Same timestamping mechanism as SO_TIMESTAMP, but reports the
-  timestamp as struct timespec (nsec resolution).
+  timestamp as struct timespec in nsec resolution.
+  SO_TIMESTAMPNS is defined as SO_TIMESTAMPNS_NEW or SO_TIMESTAMPNS_OLD
+  based on the architecture type and time_t representation of libc.
+  Control message format is in struct timespec for SO_TIMESTAMPNS_OLD
+  and in struct __kernel_timespec for SO_TIMESTAMPNS_NEW options
+  respectively.
 
 * IP_MULTICAST_LOOP + SO_TIMESTAMP[NS]
   Only for multicast:approximate transmit timestamp obtained by
@@ -22,7 +32,7 @@ The interfaces for receiving network packages timestamps are:
   timestamps for stream sockets.
 
 
-1.1 SO_TIMESTAMP:
+1.1 SO_TIMESTAMP (also SO_TIMESTAMP_OLD and SO_TIMESTAMP_NEW):
 
 This socket option enables timestamping of datagrams on the reception
 path. Because the destination socket, if any, is not known early in
@@ -31,15 +41,25 @@ same is true for all early receive timestamp options.
 
 For interface details, see `man 7 socket`.
 
+Always use SO_TIMESTAMP_NEW timestamp to always get timestamp in
+struct __kernel_sock_timeval format.
 
-1.2 SO_TIMESTAMPNS:
+SO_TIMESTAMP_OLD returns incorrect timestamps after the year 2038
+on 32 bit machines.
+
+1.2 SO_TIMESTAMPNS (also SO_TIMESTAMPNS_OLD and SO_TIMESTAMPNS_NEW):
 
 This option is identical to SO_TIMESTAMP except for the returned data type.
 Its struct timespec allows for higher resolution (ns) timestamps than the
 timeval of SO_TIMESTAMP (ms).
 
+Always use SO_TIMESTAMPNS_NEW timestamp to always get timestamp in
+struct __kernel_timespec format.
+
+SO_TIMESTAMPNS_OLD returns incorrect timestamps after the year 2038
+on 32 bit machines.
 
-1.3 SO_TIMESTAMPING:
+1.3 SO_TIMESTAMPING (also SO_TIMESTAMPING_OLD and SO_TIMESTAMPING_NEW):
 
 Supports multiple types of timestamp requests. As a result, this
 socket option takes a bitmap of flags, not a boolean. In
@@ -323,10 +343,23 @@ SO_TIMESTAMP and SO_TIMESTAMPNS records can be retrieved.
 These timestamps are returned in a control message with cmsg_level
 SOL_SOCKET, cmsg_type SCM_TIMESTAMPING, and payload of type
 
+For SO_TIMESTAMPING_OLD:
+
 struct scm_timestamping {
 	struct timespec ts[3];
 };
 
+For SO_TIMESTAMPING_NEW:
+
+struct scm_timestamping64 {
+	struct __kernel_timespec ts[3];
+
+Always use SO_TIMESTAMPING_NEW timestamp to always get timestamp in
+struct scm_timestamping64 format.
+
+SO_TIMESTAMPING_OLD returns incorrect timestamps after the year 2038
+on 32 bit machines.
+
 The structure can return up to three timestamps. This is a legacy
 feature. At least one field is non-zero at any time. Most timestamps
 are passed in ts[0]. Hardware timestamps are passed in ts[2].
-- 
2.17.1

Re: [PATCH v3 1/8] arch: Use asm-generic/socket.h when possible

[Max Filippov]

On Mon, Jan 7, 2019 at 7:28 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
>
> Many architectures maintain an arch specific copy of the
> file even though there are no differences with the asm-generic
> one. Allow these architectures to use the generic one instead.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> Cc: chris@zankel.net
> Cc: fenghua.yu@intel.com
> Cc: tglx@linutronix.de
> Cc: schwidefsky@de.ibm.com
> Cc: linux-ia64@vger.kernel.org
> Cc: linux-xtensa@linux-xtensa.org
> Cc: linux-s390@vger.kernel.org
> ---
>  arch/ia64/include/uapi/asm/Kbuild     |   1 +
>  arch/ia64/include/uapi/asm/socket.h   | 120 -------------------------
>  arch/s390/include/uapi/asm/Kbuild     |   1 +
>  arch/s390/include/uapi/asm/socket.h   | 117 ------------------------
>  arch/x86/include/uapi/asm/Kbuild      |   1 +
>  arch/x86/include/uapi/asm/socket.h    |   1 -
>  arch/xtensa/include/asm/Kbuild        |   1 +
>  arch/xtensa/include/uapi/asm/Kbuild   |   1 +
>  arch/xtensa/include/uapi/asm/socket.h | 122 --------------------------
>  9 files changed, 5 insertions(+), 360 deletions(-)
>  delete mode 100644 arch/ia64/include/uapi/asm/socket.h
>  delete mode 100644 arch/s390/include/uapi/asm/socket.h
>  delete mode 100644 arch/x86/include/uapi/asm/socket.h
>  delete mode 100644 arch/xtensa/include/uapi/asm/socket.h

For xtensa:
Acked-by: Max Filippov <jcmvbkbc@gmail.com>

-- 
Thanks.
-- Max

Re: [PATCH v3 1/8] arch: Use asm-generic/socket.h when possible

[Heiko Carstens]

On Mon, Jan 07, 2019 at 07:26:50PM -0800, Deepa Dinamani wrote:
> Many architectures maintain an arch specific copy of the
> file even though there are no differences with the asm-generic
> one. Allow these architectures to use the generic one instead.
> 
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> ---
>  arch/s390/include/uapi/asm/Kbuild     |   1 +
>  arch/s390/include/uapi/asm/socket.h   | 117 ------------------------

For the s390 bits:

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>

Re: [PATCH v3 0/8] net: y2038-safe socket timestamps

[Willem de Bruijn]

On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
>
> The series introduces new socket timestamps that are
> y2038 safe.
>
> The time data types used for the existing socket timestamp
> options: SO_TIMESTAMP, SO_TIMESTAMPNS and SO_TIMESTAMPING
> are not y2038 safe. The series introduces SO_TIMESTAMP_NEW,
> SO_TIMESTAMPNS_NEW and SO_TIMESTAMPING_NEW to replace these.
> These new timestamps can be used on all architectures.
>
> The alternative considered was to extend the sys_setsockopt()
> by using the flags. We did not receive any strong opinions about
> either of the approaches. Hence, this was chosen, as glibc folks
> preferred this.
>
> The series does not deal with updating the internal kernel socket
> calls like rxrpc to make them y2038 safe. This will be dealt
> with separately.
>
> Note that the timestamps behavior already does not match the
> man page specific behavior:
> SIOCGSTAMP
>     This ioctl should only be used if the socket option SO_TIMESTAMP
>         is not set on the socket. Otherwise, it returns the timestamp of
>         the last packet that was received while SO_TIMESTAMP was not set,
>         or it fails if no such packet has been received,
>         (i.e., ioctl(2) returns -1 with errno set to ENOENT).
>
> The recommendation is to update the man page to remove the above statement.
>
> The overview of the series is as below:
> 1. Delete asm specific socket.h when possible.
> 2. Support SO/SCM_TIMESTAMP* options only in userspace.
> 3. Rename current SO/SCM_TIMESTAMP* to SO/SCM_TIMESTAMP*_OLD.
> 3. Alter socket options so that SOCK_RCVTSTAMPNS does
>    not rely on SOCK_RCVTSTAMP.
> 4. Introduce y2038 safe types for socket timestamp.
> 5. Introduce new y2038 safe socket options SO/SCM_TIMESTAMP*_NEW.
>
> Changes since v2:
> * Removed extra functions to reduce diff churn as per code review

Thanks, Deepa. This set looks great to me.

One issue, it does not apply cleanly to current davem-net-next/master
for me. A conflict on patch 7. It does apply cleanly on davem-net
master. Please rebase and also send with [PATCH net-next].

Perhaps also run the selftests in
tools/testing/selftests/networking/timestamping/txtimestamp.sh, just
to be sure.

Since you have a to resend anyway, a few minor nits inline, as well.

Re: [PATCH v3 7/8] socket: Add SO_TIMESTAMPING_NEW

[Willem de Bruijn]

On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
>
> Add SO_TIMESTAMPING_NEW variant of socket timestamp options.
> This is the y2038 safe versions of the SO_TIMESTAMPING_OLD
> for all architectures.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> Cc: chris@zankel.net
> Cc: fenghua.yu@intel.com
> Cc: rth@twiddle.net
> Cc: tglx@linutronix.de
> Cc: ubraun@linux.ibm.com
> Cc: linux-alpha@vger.kernel.org
> Cc: linux-arch@vger.kernel.org
> Cc: linux-ia64@vger.kernel.org
> Cc: linux-mips@linux-mips.org
> Cc: linux-s390@vger.kernel.org
> Cc: linux-xtensa@linux-xtensa.org
> Cc: sparclinux@vger.kernel.org
> ---

> --- a/arch/sparc/include/uapi/asm/socket.h
> +++ b/arch/sparc/include/uapi/asm/socket.h
> @@ -106,20 +106,22 @@
>  #define SO_TIMESTAMPNS_OLD       0x0021
>  #define SO_TIMESTAMPING_OLD      0x0023
>
> -#define SO_TIMESTAMP_NEW         0x0040
> -#define SO_TIMESTAMPNS_NEW       0x0041
> +#define SO_TIMESTAMP_NEW         0x0041
> +#define SO_TIMESTAMPNS_NEW       0x0042
> +#define SO_TIMESTAMPING_NEW      0x0043

nit: unnecessary? perhaps need to get indentation consistent
immediately in the previous patch in this series that introduces
SO_TIMESTAMP_NEW

Re: [PATCH v3 6/8] socket: Add SO_TIMESTAMP[NS]_NEW

[Willem de Bruijn]

On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
>
> Add SO_TIMESTAMP_NEW and SO_TIMESTAMPNS_NEW variants of
> socket timestamp options.
> These are the y2038 safe versions of the SO_TIMESTAMP_OLD
> and SO_TIMESTAMPNS_OLD for all architectures.
>
> Note that the format of scm_timestamping.ts[0] is not changed
> in this patch.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> Cc: jejb@parisc-linux.org
> Cc: ralf@linux-mips.org
> Cc: rth@twiddle.net
> Cc: linux-alpha@vger.kernel.org
> Cc: linux-mips@linux-mips.org
> Cc: linux-parisc@vger.kernel.org
> Cc: linux-rdma@vger.kernel.org
> Cc: netdev@vger.kernel.org
> Cc: sparclinux@vger.kernel.org

> diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
> index 00e45c80e574..352e3dc0b3d9 100644
> --- a/arch/alpha/include/uapi/asm/socket.h
> +++ b/arch/alpha/include/uapi/asm/socket.h
> @@ -3,6 +3,7 @@
>  #define _UAPI_ASM_SOCKET_H
>
>  #include <asm/sockios.h>
> +#include <asm/bitsperlong.h>
>
>  /* For setsockopt(2) */
>  /*
> @@ -110,12 +111,22 @@
>
>  #define SO_TIMESTAMP_OLD         29
>  #define SO_TIMESTAMPNS_OLD       35
> +

nit: unnecessary whitespace line

> @@ -1864,20 +1864,39 @@ static void tcp_update_recv_tstamps(struct sk_buff *skb,
>  static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
>                                struct scm_timestamping *tss)
>  {
> -       struct __kernel_old_timeval tv;
>         bool has_timestamping = false;
> +       int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
>
>         if (tss->ts[0].tv_sec || tss->ts[0].tv_nsec) {
>                 if (sock_flag(sk, SOCK_RCVTSTAMP)) {
>                         if (sock_flag(sk, SOCK_RCVTSTAMPNS)) {
> -                               put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_OLD,
> -                                        sizeof(tss->ts[0]), &tss->ts[0]);
> -                       } else {
> -                               tv.tv_sec = tss->ts[0].tv_sec;
> -                               tv.tv_usec = tss->ts[0].tv_nsec / 1000;
> +                               if (new_tstamp) {
> +                                       struct __kernel_timespec kts = {tss->ts[0].tv_sec, tss->ts[0].tv_nsec};
> +
> +                                       put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPNS_NEW,
> +                                                sizeof(kts), &kts);
> +                               } else {
> +                                       struct timespec ts_old = tss->ts[0];

nit: intermediate variable not needed as tss->ts[0] is also of type
struct timespec.

Re: [PATCH v3 0/8] net: y2038-safe socket timestamps

[Willem de Bruijn]

On Tue, Jan 8, 2019 at 8:37 AM Willem de Bruijn
<willemdebruijn.kernel@gmail.com> wrote:
>
> On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
> >
> > The series introduces new socket timestamps that are
> > y2038 safe.
> >
> > The time data types used for the existing socket timestamp
> > options: SO_TIMESTAMP, SO_TIMESTAMPNS and SO_TIMESTAMPING
> > are not y2038 safe. The series introduces SO_TIMESTAMP_NEW,
> > SO_TIMESTAMPNS_NEW and SO_TIMESTAMPING_NEW to replace these.
> > These new timestamps can be used on all architectures.
> >
> > The alternative considered was to extend the sys_setsockopt()
> > by using the flags. We did not receive any strong opinions about
> > either of the approaches. Hence, this was chosen, as glibc folks
> > preferred this.
> >
> > The series does not deal with updating the internal kernel socket
> > calls like rxrpc to make them y2038 safe. This will be dealt
> > with separately.
> >
> > Note that the timestamps behavior already does not match the
> > man page specific behavior:
> > SIOCGSTAMP
> >     This ioctl should only be used if the socket option SO_TIMESTAMP
> >         is not set on the socket. Otherwise, it returns the timestamp of
> >         the last packet that was received while SO_TIMESTAMP was not set,
> >         or it fails if no such packet has been received,
> >         (i.e., ioctl(2) returns -1 with errno set to ENOENT).
> >
> > The recommendation is to update the man page to remove the above statement.
> >
> > The overview of the series is as below:
> > 1. Delete asm specific socket.h when possible.
> > 2. Support SO/SCM_TIMESTAMP* options only in userspace.
> > 3. Rename current SO/SCM_TIMESTAMP* to SO/SCM_TIMESTAMP*_OLD.
> > 3. Alter socket options so that SOCK_RCVTSTAMPNS does
> >    not rely on SOCK_RCVTSTAMP.
> > 4. Introduce y2038 safe types for socket timestamp.
> > 5. Introduce new y2038 safe socket options SO/SCM_TIMESTAMP*_NEW.
> >
> > Changes since v2:
> > * Removed extra functions to reduce diff churn as per code review
>
> Thanks, Deepa. This set looks great to me.
>
> One issue, it does not apply cleanly to current davem-net-next/master
> for me. A conflict on patch 7. It does apply cleanly on davem-net
> master. Please rebase and also send with [PATCH net-next].

to be clear, with the version, so this will be [PATCH net-next v4].

Re: [PATCH v3 6/8] socket: Add SO_TIMESTAMP[NS]_NEW

[Willem de Bruijn]

On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@gmail.com> wrote:
>
> Add SO_TIMESTAMP_NEW and SO_TIMESTAMPNS_NEW variants of
> socket timestamp options.
> These are the y2038 safe versions of the SO_TIMESTAMP_OLD
> and SO_TIMESTAMPNS_OLD for all architectures.
>
> Note that the format of scm_timestamping.ts[0] is not changed
> in this patch.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> Cc: jejb@parisc-linux.org
> Cc: ralf@linux-mips.org
> Cc: rth@twiddle.net
> Cc: linux-alpha@vger.kernel.org
> Cc: linux-mips@linux-mips.org
> Cc: linux-parisc@vger.kernel.org
> Cc: linux-rdma@vger.kernel.org
> Cc: netdev@vger.kernel.org
> Cc: sparclinux@vger.kernel.org

> @@ -1864,20 +1864,39 @@ static void tcp_update_recv_tstamps(struct sk_buff *skb,
>  static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
>                                struct scm_timestamping *tss)
>  {
> -       struct __kernel_old_timeval tv;
>         bool has_timestamping = false;
> +       int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);

nit: move above has_timestamping to maintain reverse christmas tree ordering

Re: [PATCH v3 0/8] net: y2038-safe socket timestamps

[David Miller]

From: Deepa Dinamani <deepa.kernel@gmail.com>
Date: Mon,  7 Jan 2019 19:26:49 -0800

> The series introduces new socket timestamps that are
> y2038 safe.

Great discussion, but this is definitely net-next material and the net-next
tree is not open at this time.