[PATCH 8/8] socket: Add SO_TIMESTAMPING_NEW

From: Deepa Dinamani
Date: Fri Nov 23 2018 - 21:22:22 EST

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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@xxxxxxxxx>
Cc: chris@xxxxxxxxxx
Cc: fenghua.yu@xxxxxxxxx
Cc: rth@xxxxxxxxxxx
Cc: tglx@xxxxxxxxxxxxx
Cc: ubraun@xxxxxxxxxxxxx
Cc: linux-alpha@xxxxxxxxxxxxxxx
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-s390@xxxxxxxxxxxxxxx
Cc: linux-xtensa@xxxxxxxxxxxxxxxx
Cc: sparclinux@xxxxxxxxxxxxxxx
---
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 | 7 +++
include/uapi/asm-generic/socket.h | 5 +-
include/uapi/linux/errqueue.h | 4 ++
net/core/scm.c | 27 ++++++++++
net/core/sock.c | 73 +++++++++++++++------------
net/ipv4/tcp.c | 29 ++++++-----
net/smc/af_smc.c | 3 +-
net/socket.c | 16 +++---
12 files changed, 122 insertions(+), 65 deletions(-)

diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 352e3dc0b3d9..8b9f6f7f8087 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..9fc80c5d54e4 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..82f1c9447d6b 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..5bdbb25c28d2 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 8b571e9b9f76..372fd77698a2 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -350,6 +350,13 @@ extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);

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..2fdfb6126246 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 7b485dfaa400..29cc1f0f0071 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -677,6 +677,45 @@ static void setsockopt_timestamp(struct sock *sk, int type, int val)
sock_enable_timestamp(sk, SOCK_TIMESTAMP);
}

+static int setsockopt_timestamping(struct sock *sk, int type, int val)
+{
+ if (type == SO_TIMESTAMPING_NEW)
+ sock_set_flag(sk, SOCK_TSTAMP_NEW);
+
+ if (val & ~SOF_TIMESTAMPING_MASK)
+ return -EINVAL;
+
+ if (val & SOF_TIMESTAMPING_OPT_ID &&
+ !(sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID)) {
+ if (sk->sk_protocol == IPPROTO_TCP &&
+ sk->sk_type == SOCK_STREAM) {
+ if ((1 << sk->sk_state) &
+ (TCPF_CLOSE | TCPF_LISTEN))
+ return -EINVAL;
+ sk->sk_tskey = tcp_sk(sk)->snd_una;
+ } else {
+ sk->sk_tskey = 0;
+ }
+ }
+
+ if (val & SOF_TIMESTAMPING_OPT_STATS &&
+ !(val & SOF_TIMESTAMPING_OPT_TSONLY))
+ return -EINVAL;
+
+ sk->sk_tsflags = val;
+ if (val & SOF_TIMESTAMPING_RX_SOFTWARE) {
+ sock_enable_timestamp(sk,
+ SOCK_TIMESTAMPING_RX_SOFTWARE);
+ } else {
+ if (type == SO_TIMESTAMPING_NEW)
+ sock_reset_flag(sk, SOCK_TSTAMP_NEW);
+ sock_disable_timestamp(sk,
+ (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE));
+ }
+
+ return 0;
+}
+
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.
@@ -852,39 +891,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
break;

case SO_TIMESTAMPING_OLD:
- if (val & ~SOF_TIMESTAMPING_MASK) {
- ret = -EINVAL;
- break;
- }
-
- if (val & SOF_TIMESTAMPING_OPT_ID &&
- !(sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID)) {
- if (sk->sk_protocol == IPPROTO_TCP &&
- sk->sk_type == SOCK_STREAM) {
- if ((1 << sk->sk_state) &
- (TCPF_CLOSE | TCPF_LISTEN)) {
- ret = -EINVAL;
- break;
- }
- sk->sk_tskey = tcp_sk(sk)->snd_una;
- } else {
- sk->sk_tskey = 0;
- }
- }
-
- if (val & SOF_TIMESTAMPING_OPT_STATS &&
- !(val & SOF_TIMESTAMPING_OPT_TSONLY)) {
- ret = -EINVAL;
- break;
- }
-
- sk->sk_tsflags = val;
- if (val & SOF_TIMESTAMPING_RX_SOFTWARE)
- sock_enable_timestamp(sk,
- SOCK_TIMESTAMPING_RX_SOFTWARE);
- else
- sock_disable_timestamp(sk,
- (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE));
+ ret = setsockopt_timestamping(sk, optname, val);
break;

case SO_RCVLOWAT:
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index b470f470343a..09ef0d8141fb 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1847,17 +1847,17 @@ 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};
}

static void tcp_recv_sw_timestamp(struct msghdr *msg, const struct sock *sk, struct timespec64 *ts)
@@ -1900,29 +1900,30 @@ static void tcp_recv_sw_timestamp(struct msghdr *msg, const struct sock *sk, str

/* 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;
- struct timespec64 ts = timespec_to_timespec64(tss->ts[0]);

- tcp_recv_sw_timestamp(msg, sk, &ts);
+ tcp_recv_sw_timestamp(msg, sk, &tss->ts[0]);

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);
}
}

@@ -1963,7 +1964,7 @@ 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 80e2119f1c70..e588305e9cf4 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -280,7 +280,8 @@ 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 9abeb6bc9cfe..14fa6febfc3d 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -731,6 +731,7 @@ static void sock_recv_sw_timestamp(struct msghdr *msg, struct sock *sk,
sizeof(ts), &ts);
}
}
+
/*
* called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
* or sock_flag(sk, SOCK_RCVTSTAMPNS)
@@ -739,8 +740,8 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP) || sock_flag(sk, SOCK_RCVTSTAMPNS);
- struct scm_timestamping tss;
- int empty = 1, false_tstamp = 0;
+ struct scm_timestamping_internal tss;
+ int empty = 1, false_tstamp = 0, new_tstamp = 0;
struct skb_shared_hwtstamps *shhwtstamps =
skb_hwtstamps(skb);

@@ -756,20 +757,23 @@ 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);
+ new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
+ if (new_tstamp)
+ 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

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