From: Cong Wang <xiyou.wangcong@gmail.com>
To: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org, Cong Wang <cong.wang@bytedance.com>,
John Fastabend <john.fastabend@gmail.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Jakub Sitnicki <jakub@cloudflare.com>,
Lorenz Bauer <lmb@cloudflare.com>
Subject: [Patch bpf v3 2/4] skmsg: extract and reuse sk_msg_is_readable()
Date: Fri, 1 Oct 2021 17:37:04 -0700 [thread overview]
Message-ID: <20211002003706.11237-3-xiyou.wangcong@gmail.com> (raw)
In-Reply-To: <20211002003706.11237-1-xiyou.wangcong@gmail.com>
From: Cong Wang <cong.wang@bytedance.com>
tcp_bpf_sock_is_readable() is pretty much generic,
we can extract it and reuse it for non-TCP sockets.
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
---
include/linux/skmsg.h | 1 +
net/core/skmsg.c | 14 ++++++++++++++
net/ipv4/tcp_bpf.c | 15 +--------------
3 files changed, 16 insertions(+), 14 deletions(-)
diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h
index 14ab0c0bc924..1ce9a9eb223b 100644
--- a/include/linux/skmsg.h
+++ b/include/linux/skmsg.h
@@ -128,6 +128,7 @@ int sk_msg_memcopy_from_iter(struct sock *sk, struct iov_iter *from,
struct sk_msg *msg, u32 bytes);
int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg,
int len, int flags);
+bool sk_msg_is_readable(struct sock *sk);
static inline void sk_msg_check_to_free(struct sk_msg *msg, u32 i, u32 bytes)
{
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 2d6249b28928..a86ef7e844f8 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -474,6 +474,20 @@ int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg,
}
EXPORT_SYMBOL_GPL(sk_msg_recvmsg);
+bool sk_msg_is_readable(struct sock *sk)
+{
+ struct sk_psock *psock;
+ bool empty = true;
+
+ rcu_read_lock();
+ psock = sk_psock(sk);
+ if (likely(psock))
+ empty = list_empty(&psock->ingress_msg);
+ rcu_read_unlock();
+ return !empty;
+}
+EXPORT_SYMBOL_GPL(sk_msg_is_readable);
+
static struct sk_msg *sk_psock_create_ingress_msg(struct sock *sk,
struct sk_buff *skb)
{
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 0175dbcb7722..dabbc93e31b6 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -150,19 +150,6 @@ int tcp_bpf_sendmsg_redir(struct sock *sk, struct sk_msg *msg,
EXPORT_SYMBOL_GPL(tcp_bpf_sendmsg_redir);
#ifdef CONFIG_BPF_SYSCALL
-static bool tcp_bpf_sock_is_readable(struct sock *sk)
-{
- struct sk_psock *psock;
- bool empty = true;
-
- rcu_read_lock();
- psock = sk_psock(sk);
- if (likely(psock))
- empty = list_empty(&psock->ingress_msg);
- rcu_read_unlock();
- return !empty;
-}
-
static int tcp_msg_wait_data(struct sock *sk, struct sk_psock *psock,
long timeo)
{
@@ -479,7 +466,7 @@ static void tcp_bpf_rebuild_protos(struct proto prot[TCP_BPF_NUM_CFGS],
prot[TCP_BPF_BASE].unhash = sock_map_unhash;
prot[TCP_BPF_BASE].close = sock_map_close;
prot[TCP_BPF_BASE].recvmsg = tcp_bpf_recvmsg;
- prot[TCP_BPF_BASE].sock_is_readable = tcp_bpf_sock_is_readable;
+ prot[TCP_BPF_BASE].sock_is_readable = sk_msg_is_readable;
prot[TCP_BPF_TX] = prot[TCP_BPF_BASE];
prot[TCP_BPF_TX].sendmsg = tcp_bpf_sendmsg;
--
2.30.2
next prev parent reply other threads:[~2021-10-02 0:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-02 0:37 [Patch bpf v3 0/4] sock_map: fix ->poll() and update selftests Cong Wang
2021-10-02 0:37 ` [Patch bpf v3 1/4] net: rename ->stream_memory_read to ->sock_is_readable Cong Wang
2021-10-02 0:37 ` Cong Wang [this message]
2021-10-02 0:37 ` [Patch bpf v3 3/4] net: implement ->sock_is_readable() for UDP and AF_UNIX Cong Wang
2021-10-07 20:00 ` Daniel Borkmann
2021-10-07 20:53 ` Cong Wang
2021-10-08 15:26 ` John Fastabend
2021-10-02 0:37 ` [Patch bpf v3 4/4] selftests/bpf: use recv_timeout() instead of retries Cong Wang
2021-10-06 15:24 ` [Patch bpf v3 0/4] sock_map: fix ->poll() and update selftests John Fastabend
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