Re: [PATCH net-next 2/4] tcp: export do_tcp_sendpages and tcp_rate_check_app_limited functions

[David Miller]

From: Dave Watson 
Date: Wed, 24 May 2017 09:26:57 -0700

> Export do_tcp_sendpages and tcp_rate_check_app_limited, since tls will need to
> sendpages while the socket is already locked.
> 
> tcp_sendpage is exported, but requires the socket lock to not be held already.
> 
> Signed-off-by: Aviad Yehezkel 
> Signed-off-by: Ilya Lesokhin 
> Signed-off-by: Boris Pismenny 
> Signed-off-by: Dave Watson 
 ...
> +EXPORT_SYMBOL(do_tcp_sendpages);
 ...
> +EXPORT_SYMBOL(tcp_rate_check_app_limited);

These need to both be EXPORT_SYMBOL_GPL().

[PATCH net-next 2/4] tcp: export do_tcp_sendpages and tcp_rate_check_app_limited functions

[Dave Watson]

Export do_tcp_sendpages and tcp_rate_check_app_limited, since tls will need to
sendpages while the socket is already locked.

tcp_sendpage is exported, but requires the socket lock to not be held already.

Signed-off-by: Aviad Yehezkel 
Signed-off-by: Ilya Lesokhin 
Signed-off-by: Boris Pismenny 
Signed-off-by: Dave Watson 
---
 include/net/tcp.h   | 2 ++
 net/ipv4/tcp.c  | 5 +++--
 net/ipv4/tcp_rate.c | 1 +
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index fcc39f8..2b35100 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -353,6 +353,8 @@ int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
 int tcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
 int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
 int flags);
+ssize_t do_tcp_sendpages(struct sock *sk, struct page *page, int offset,
+size_t size, int flags);
 void tcp_release_cb(struct sock *sk);
 void tcp_wfree(struct sk_buff *skb);
 void tcp_write_timer_handler(struct sock *sk);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 9f06faa..08a8ef4 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -882,8 +882,8 @@ static int tcp_send_mss(struct sock *sk, int *size_goal, 
int flags)
return mss_now;
 }
 
-static ssize_t do_tcp_sendpages(struct sock *sk, struct page *page, int offset,
-   size_t size, int flags)
+ssize_t do_tcp_sendpages(struct sock *sk, struct page *page, int offset,
+size_t size, int flags)
 {
struct tcp_sock *tp = tcp_sk(sk);
int mss_now, size_goal;
@@ -1013,6 +1013,7 @@ static ssize_t do_tcp_sendpages(struct sock *sk, struct 
page *page, int offset,
}
return sk_stream_error(sk, flags, err);
 }
+EXPORT_SYMBOL(do_tcp_sendpages);
 
 int tcp_sendpage(struct sock *sk, struct page *page, int offset,
 size_t size, int flags)
diff --git a/net/ipv4/tcp_rate.c b/net/ipv4/tcp_rate.c
index ad99569..62876e4 100644
--- a/net/ipv4/tcp_rate.c
+++ b/net/ipv4/tcp_rate.c
@@ -185,3 +185,4 @@ void tcp_rate_check_app_limited(struct sock *sk)
tp->app_limited =
(tp->delivered + tcp_packets_in_flight(tp)) ? : 1;
 }
+EXPORT_SYMBOL(tcp_rate_check_app_limited);
-- 
2.9.3