From dcf823cf62a2671704aea71f18eeede3abb6ca12 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 28 May 2020 07:12:14 +0200 Subject: [PATCH] net: add sock_enable_timestamps Add a helper to directly enable timestamps instead of setting the SO_TIMESTAMP* sockopts from kernel space and going through a fake uaccess. Signed-off-by: Christoph Hellwig Signed-off-by: David S. Miller --- include/net/sock.h | 1 + net/core/sock.c | 47 +++++++++++++++++++++++++--------------- net/rxrpc/local_object.c | 8 +------ 3 files changed, 31 insertions(+), 25 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index cdec7bc055d5b..99ef43508d2b5 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2689,6 +2689,7 @@ static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif) void sock_def_readable(struct sock *sk); int sock_bindtoindex(struct sock *sk, int ifindex); +void sock_enable_timestamps(struct sock *sk); void sock_no_linger(struct sock *sk); void sock_set_priority(struct sock *sk, u32 priority); void sock_set_reuseaddr(struct sock *sk); diff --git a/net/core/sock.c b/net/core/sock.c index 23f80880fbb2c..e4a4dd2b3d8b3 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -757,6 +757,28 @@ void sock_set_sndtimeo(struct sock *sk, s64 secs) } EXPORT_SYMBOL(sock_set_sndtimeo); +static void __sock_set_timestamps(struct sock *sk, bool val, bool new, bool ns) +{ + if (val) { + sock_valbool_flag(sk, SOCK_TSTAMP_NEW, new); + sock_valbool_flag(sk, SOCK_RCVTSTAMPNS, ns); + sock_set_flag(sk, SOCK_RCVTSTAMP); + sock_enable_timestamp(sk, SOCK_TIMESTAMP); + } else { + sock_reset_flag(sk, SOCK_RCVTSTAMP); + sock_reset_flag(sk, SOCK_RCVTSTAMPNS); + sock_reset_flag(sk, SOCK_TSTAMP_NEW); + } +} + +void sock_enable_timestamps(struct sock *sk) +{ + lock_sock(sk); + __sock_set_timestamps(sk, true, false, true); + release_sock(sk); +} +EXPORT_SYMBOL(sock_enable_timestamps); + /* * This is meant for all protocols to use and covers goings on * at the socket level. Everything here is generic. @@ -948,28 +970,17 @@ set_rcvbuf: break; case SO_TIMESTAMP_OLD: + __sock_set_timestamps(sk, valbool, false, false); + break; case SO_TIMESTAMP_NEW: + __sock_set_timestamps(sk, valbool, true, false); + break; case SO_TIMESTAMPNS_OLD: + __sock_set_timestamps(sk, valbool, false, true); + break; case SO_TIMESTAMPNS_NEW: - if (valbool) { - 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); - sock_set_flag(sk, SOCK_RCVTSTAMP); - sock_enable_timestamp(sk, SOCK_TIMESTAMP); - } else { - sock_reset_flag(sk, SOCK_RCVTSTAMP); - sock_reset_flag(sk, SOCK_RCVTSTAMPNS); - sock_reset_flag(sk, SOCK_TSTAMP_NEW); - } + __sock_set_timestamps(sk, valbool, true, true); break; - case SO_TIMESTAMPING_NEW: sock_set_flag(sk, SOCK_TSTAMP_NEW); /* fall through */ diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 01135e54d95d2..5ea2bd01fdd59 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -189,13 +189,7 @@ 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_OLD, - (char *)&opt, sizeof(opt)); - if (ret < 0) { - _debug("setsockopt failed"); - goto error; - } + sock_enable_timestamps(local->socket->sk); break; default: -- 2.39.5