[PATCH bpf-next v1 1/7] net: add splice_read to struct proto and set it in tcp_prot/tcpv6_prot

[Jiayuan Chen <jiayuan.chen@linux.dev>]

Add a splice_read function pointer to struct proto between recvmsg and
splice_eof. Set it to tcp_splice_read in both tcp_prot and tcpv6_prot.

Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
---
 include/net/sock.h  | 3 +++
 net/ipv4/tcp_ipv4.c | 1 +
 net/ipv6/tcp_ipv6.c | 1 +
 3 files changed, 5 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index 6c9a83016e95..de28af168ec4 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1317,6 +1317,9 @@ struct proto {
 					   size_t len);
 	int			(*recvmsg)(struct sock *sk, struct msghdr *msg,
 					   size_t len, int flags, int *addr_len);
+	ssize_t			(*splice_read)(struct socket *sock, loff_t *ppos,
+					       struct pipe_inode_info *pipe, size_t len,
+					       unsigned int flags);
 	void			(*splice_eof)(struct socket *sock);
 	int			(*bind)(struct sock *sk,
 					struct sockaddr_unsized *addr, int addr_len);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d53d39be291a..fa445f20b427 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3433,6 +3433,7 @@ struct proto tcp_prot = {
 	.keepalive		= tcp_set_keepalive,
 	.recvmsg		= tcp_recvmsg,
 	.sendmsg		= tcp_sendmsg,
+	.splice_read		= tcp_splice_read,
 	.splice_eof		= tcp_splice_eof,
 	.backlog_rcv		= tcp_v4_do_rcv,
 	.release_cb		= tcp_release_cb,
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index e46a0efae012..277b954c524d 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2295,6 +2295,7 @@ struct proto tcpv6_prot = {
 	.keepalive		= tcp_set_keepalive,
 	.recvmsg		= tcp_recvmsg,
 	.sendmsg		= tcp_sendmsg,
+	.splice_read		= tcp_splice_read,
 	.splice_eof		= tcp_splice_eof,
 	.backlog_rcv		= tcp_v6_do_rcv,
 	.release_cb		= tcp_release_cb,
-- 
2.43.0