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Message-ID: <20200320023426.60684-3-yuehaibing@huawei.com>
Date: Fri, 20 Mar 2020 10:34:26 +0800
From: YueHaibing <yuehaibing@...wei.com>
To: <lmb@...udflare.com>, <daniel@...earbox.net>,
<jakub@...udflare.com>, <john.fastabend@...il.com>
CC: <davem@...emloft.net>, <netdev@...r.kernel.org>,
<bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<andrii.nakryiko@...il.com>, YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH bpf-next 2/2] bpf: tcp: Make tcp_bpf_recvmsg static
After commit f747632b608f ("bpf: sockmap: Move generic sockmap
hooks from BPF TCP"), tcp_bpf_recvmsg() is not used out of
tcp_bpf.c, so make it static and remove it from tcp.h. Also move
it to BPF_STREAM_PARSER #ifdef to fix unused function warnings.
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
include/net/tcp.h | 2 -
net/ipv4/tcp_bpf.c | 124 ++++++++++++++++++++++-----------------------
2 files changed, 62 insertions(+), 64 deletions(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 43fa07a36fa6..5fa9eacd965a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -2207,8 +2207,6 @@ static inline void tcp_bpf_clone(const struct sock *sk, struct sock *newsk)
#ifdef CONFIG_NET_SOCK_MSG
int tcp_bpf_sendmsg_redir(struct sock *sk, struct sk_msg *msg, u32 bytes,
int flags);
-int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len);
int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
struct msghdr *msg, int len, int flags);
#endif /* CONFIG_NET_SOCK_MSG */
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 37c91f25cae3..5a05327f97c1 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -10,25 +10,6 @@
#include <net/inet_common.h>
#include <net/tls.h>
-static int tcp_bpf_wait_data(struct sock *sk, struct sk_psock *psock,
- int flags, long timeo, int *err)
-{
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int ret = 0;
-
- if (!timeo)
- return ret;
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- ret = sk_wait_event(sk, &timeo,
- !list_empty(&psock->ingress_msg) ||
- !skb_queue_empty(&sk->sk_receive_queue), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- return ret;
-}
-
int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
struct msghdr *msg, int len, int flags)
{
@@ -102,49 +83,6 @@ int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
}
EXPORT_SYMBOL_GPL(__tcp_bpf_recvmsg);
-int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len)
-{
- struct sk_psock *psock;
- int copied, ret;
-
- psock = sk_psock_get(sk);
- if (unlikely(!psock))
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
- if (unlikely(flags & MSG_ERRQUEUE))
- return inet_recv_error(sk, msg, len, addr_len);
- if (!skb_queue_empty(&sk->sk_receive_queue) &&
- sk_psock_queue_empty(psock))
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
- lock_sock(sk);
-msg_bytes_ready:
- copied = __tcp_bpf_recvmsg(sk, psock, msg, len, flags);
- if (!copied) {
- int data, err = 0;
- long timeo;
-
- timeo = sock_rcvtimeo(sk, nonblock);
- data = tcp_bpf_wait_data(sk, psock, flags, timeo, &err);
- if (data) {
- if (!sk_psock_queue_empty(psock))
- goto msg_bytes_ready;
- release_sock(sk);
- sk_psock_put(sk, psock);
- return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
- }
- if (err) {
- ret = err;
- goto out;
- }
- copied = -EAGAIN;
- }
- ret = copied;
-out:
- release_sock(sk);
- sk_psock_put(sk, psock);
- return ret;
-}
-
static int bpf_tcp_ingress(struct sock *sk, struct sk_psock *psock,
struct sk_msg *msg, u32 apply_bytes, int flags)
{
@@ -299,6 +237,68 @@ static bool tcp_bpf_stream_read(const struct sock *sk)
return !empty;
}
+static int tcp_bpf_wait_data(struct sock *sk, struct sk_psock *psock,
+ int flags, long timeo, int *err)
+{
+ DEFINE_WAIT_FUNC(wait, woken_wake_function);
+ int ret = 0;
+
+ if (!timeo)
+ return ret;
+
+ add_wait_queue(sk_sleep(sk), &wait);
+ sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
+ ret = sk_wait_event(sk, &timeo,
+ !list_empty(&psock->ingress_msg) ||
+ !skb_queue_empty(&sk->sk_receive_queue), &wait);
+ sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
+ remove_wait_queue(sk_sleep(sk), &wait);
+ return ret;
+}
+
+static int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ int nonblock, int flags, int *addr_len)
+{
+ struct sk_psock *psock;
+ int copied, ret;
+
+ psock = sk_psock_get(sk);
+ if (unlikely(!psock))
+ return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ if (unlikely(flags & MSG_ERRQUEUE))
+ return inet_recv_error(sk, msg, len, addr_len);
+ if (!skb_queue_empty(&sk->sk_receive_queue) &&
+ sk_psock_queue_empty(psock))
+ return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ lock_sock(sk);
+msg_bytes_ready:
+ copied = __tcp_bpf_recvmsg(sk, psock, msg, len, flags);
+ if (!copied) {
+ int data, err = 0;
+ long timeo;
+
+ timeo = sock_rcvtimeo(sk, nonblock);
+ data = tcp_bpf_wait_data(sk, psock, flags, timeo, &err);
+ if (data) {
+ if (!sk_psock_queue_empty(psock))
+ goto msg_bytes_ready;
+ release_sock(sk);
+ sk_psock_put(sk, psock);
+ return tcp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ }
+ if (err) {
+ ret = err;
+ goto out;
+ }
+ copied = -EAGAIN;
+ }
+ ret = copied;
+out:
+ release_sock(sk);
+ sk_psock_put(sk, psock);
+ return ret;
+}
+
static int tcp_bpf_send_verdict(struct sock *sk, struct sk_psock *psock,
struct sk_msg *msg, int *copied, int flags)
{
--
2.17.1
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