net: ipv4: Hook into time based transmission

Add a transmit_time field to struct inet_cork, then copy the
timestamp from the CMSG cookie at ip_setup_cork() so we can
safely copy it into the skb later during __ip_make_skb().

For the raw fast path, just perform the copy at raw_send_hdrinc().

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 83d5b3c..314be48 100644 (file)
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -148,6 +148,7 @@ struct inet_cork {
        __s16                   tos;
        char                    priority;
        __u16                   gso_size;
+       u64                     transmit_time;
 };
 
 struct inet_cork_full {

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 1617604..937239a 100644 (file)
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -437,6 +437,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
        ipc.tx_flags = 0;
        ipc.ttl = 0;
        ipc.tos = -1;
+       ipc.sockc.transmit_time = 0;
 
        if (icmp_param->replyopts.opt.opt.optlen) {
                ipc.opt = &icmp_param->replyopts.opt;
@@ -715,6 +716,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
        ipc.tx_flags = 0;
        ipc.ttl = 0;
        ipc.tos = -1;
+       ipc.sockc.transmit_time = 0;
 
        rt = icmp_route_lookup(net, &fl4, skb_in, iph, saddr, tos, mark,
                               type, code, &icmp_param);

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 188cc58..570e3eb 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1154,6 +1154,7 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
        cork->tos = ipc->tos;
        cork->priority = ipc->priority;
        cork->tx_flags = ipc->tx_flags;
+       cork->transmit_time = ipc->sockc.transmit_time;
 
        return 0;
 }
@@ -1414,6 +1415,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
 
        skb->priority = (cork->tos != -1) ? cork->priority: sk->sk_priority;
        skb->mark = sk->sk_mark;
+       skb->tstamp = cork->transmit_time;
        /*
         * Steal rt from cork.dst to avoid a pair of atomic_inc/atomic_dec
         * on dst refcount
@@ -1551,6 +1553,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
        ipc.tx_flags = 0;
        ipc.ttl = 0;
        ipc.tos = -1;
+       ipc.sockc.transmit_time = 0;
 
        if (replyopts.opt.opt.optlen) {
                ipc.opt = &replyopts.opt;

diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 2ed64bc..b474922 100644 (file)
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -746,6 +746,7 @@ static int ping_v4_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
        ipc.tx_flags = 0;
        ipc.ttl = 0;
        ipc.tos = -1;
+       ipc.sockc.transmit_time = 0;
 
        if (msg->msg_controllen) {
                err = ip_cmsg_send(sk, msg, &ipc, false);

diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index abb3c94..446af7b 100644 (file)
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -381,6 +381,7 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
 
        skb->priority = sk->sk_priority;
        skb->mark = sk->sk_mark;
+       skb->tstamp = sockc->transmit_time;
        skb_dst_set(skb, &rt->dst);
        *rtp = NULL;
 
@@ -562,6 +563,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
        }
 
        ipc.sockc.tsflags = sk->sk_tsflags;
+       ipc.sockc.transmit_time = 0;
        ipc.addr = inet->inet_saddr;
        ipc.opt = NULL;
        ipc.tx_flags = 0;

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 24e116d..5c76ba0 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -930,6 +930,7 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
        ipc.tx_flags = 0;
        ipc.ttl = 0;
        ipc.tos = -1;
+       ipc.sockc.transmit_time = 0;
 
        getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;