Merge branch 'sendmsg_recvmsg_iocb_removal'

Ying Xue says:

====================
net: Remove iocb argument from sendmsg and recvmsg

Currently there is only one user - TIPC whose sendmsg() instances
using iocb argument. Meanwhile, there is no user using iocb argument
in its recvmsg() instance. Therefore, if we eliminate the werid usage
of iobc argument from TIPC, the iocb argument can be removed from
all sendmsg() and recvmsg() instances of the whole networking stack.

Reference:
https://patchwork.ozlabs.org/patch/433960/

Changes:

v2:
 * Fix compile errors of DCCP module pointed by David
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

8 files changed, 27 insertions, 35 deletions

diff --git a/include/linux/net.h b/include/linux/net.h
index 17d83393afcc..e74114bcca68 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -120,7 +120,6 @@ struct socket {
 
 struct vm_area_struct;
 struct page;
-struct kiocb;
 struct sockaddr;
 struct msghdr;
 struct module;
@@ -162,8 +161,8 @@ struct proto_ops {
 	int		(*compat_getsockopt)(struct socket *sock, int level,
 				      int optname, char __user *optval, int __user *optlen);
 #endif
-	int		(*sendmsg)   (struct kiocb *iocb, struct socket *sock,
-				      struct msghdr *m, size_t total_len);
+	int		(*sendmsg)   (struct socket *sock, struct msghdr *m,
+				      size_t total_len);
 	/* Notes for implementing recvmsg:
 	 * ===============================
 	 * msg->msg_namelen should get updated by the recvmsg handlers
@@ -172,9 +171,8 @@ struct proto_ops {
 	 * handlers can assume that msg.msg_name is either NULL or has
 	 * a minimum size of sizeof(struct sockaddr_storage).
 	 */
-	int		(*recvmsg)   (struct kiocb *iocb, struct socket *sock,
-				      struct msghdr *m, size_t total_len,
-				      int flags);
+	int		(*recvmsg)   (struct socket *sock, struct msghdr *m,
+				      size_t total_len, int flags);
 	int		(*mmap)	     (struct file *file, struct socket *sock,
 				      struct vm_area_struct * vma);
 	ssize_t		(*sendpage)  (struct socket *sock, struct page *page,
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 0d87674fb775..172632dd9930 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -100,8 +100,8 @@ struct vsock_transport {
 
 	/* DGRAM. */
 	int (*dgram_bind)(struct vsock_sock *, struct sockaddr_vm *);
-	int (*dgram_dequeue)(struct kiocb *kiocb, struct vsock_sock *vsk,
-			     struct msghdr *msg, size_t len, int flags);
+	int (*dgram_dequeue)(struct vsock_sock *vsk, struct msghdr *msg,
+			     size_t len, int flags);
 	int (*dgram_enqueue)(struct vsock_sock *, struct sockaddr_vm *,
 			     struct msghdr *, size_t len);
 	bool (*dgram_allow)(u32 cid, u32 port);
diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 4500bf88ff55..6bb97df16d2d 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -245,10 +245,10 @@ int  bt_sock_register(int proto, const struct net_proto_family *ops);
 void bt_sock_unregister(int proto);
 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
-int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
-				struct msghdr *msg, size_t len, int flags);
-int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
-			struct msghdr *msg, size_t len, int flags);
+int  bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+		     int flags);
+int  bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len, int flags);
 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index b2828a06a5a6..4a92423eefa5 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -21,12 +21,11 @@ int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
 int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
 		       int addr_len, int flags);
 int inet_accept(struct socket *sock, struct socket *newsock, int flags);
-int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
-		 size_t size);
+int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size);
 ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
 		      size_t size, int flags);
-int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
-		 size_t size, int flags);
+int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+		 int flags);
 int inet_shutdown(struct socket *sock, int how);
 int inet_listen(struct socket *sock, int backlog);
 void inet_sock_destruct(struct sock *sk);
diff --git a/include/net/ping.h b/include/net/ping.h
index cc16d413f681..ac80cb45e630 100644
--- a/include/net/ping.h
+++ b/include/net/ping.h
@@ -75,12 +75,11 @@ void ping_err(struct sk_buff *skb, int offset, u32 info);
 int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
 		  struct sk_buff *);
 
-int  ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		  size_t len, int noblock, int flags, int *addr_len);
+int  ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
+		  int flags, int *addr_len);
 int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
 			 void *user_icmph, size_t icmph_len);
-int  ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		     size_t len);
+int  ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len);
 int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 bool ping_rcv(struct sk_buff *skb);
 
diff --git a/include/net/sock.h b/include/net/sock.h
index 38369d3580a1..250822cc1e02 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -958,10 +958,9 @@ struct proto {
 	int			(*compat_ioctl)(struct sock *sk,
 					unsigned int cmd, unsigned long arg);
 #endif
-	int			(*sendmsg)(struct kiocb *iocb, struct sock *sk,
-					   struct msghdr *msg, size_t len);
-	int			(*recvmsg)(struct kiocb *iocb, struct sock *sk,
-					   struct msghdr *msg,
+	int			(*sendmsg)(struct sock *sk, struct msghdr *msg,
+					   size_t len);
+	int			(*recvmsg)(struct sock *sk, struct msghdr *msg,
 					   size_t len, int noblock, int flags,
 					   int *addr_len);
 	int			(*sendpage)(struct sock *sk, struct page *page,
@@ -1562,9 +1561,8 @@ int sock_no_listen(struct socket *, int);
 int sock_no_shutdown(struct socket *, int);
 int sock_no_getsockopt(struct socket *, int , int, char __user *, int __user *);
 int sock_no_setsockopt(struct socket *, int, int, char __user *, unsigned int);
-int sock_no_sendmsg(struct kiocb *, struct socket *, struct msghdr *, size_t);
-int sock_no_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t,
-		    int);
+int sock_no_sendmsg(struct socket *, struct msghdr *, size_t);
+int sock_no_recvmsg(struct socket *, struct msghdr *, size_t, int);
 int sock_no_mmap(struct file *file, struct socket *sock,
 		 struct vm_area_struct *vma);
 ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
@@ -1576,8 +1574,8 @@ ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
  */
 int sock_common_getsockopt(struct socket *sock, int level, int optname,
 				  char __user *optval, int __user *optlen);
-int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
-			       struct msghdr *msg, size_t size, int flags);
+int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+			int flags);
 int sock_common_setsockopt(struct socket *sock, int level, int optname,
 				  char __user *optval, unsigned int optlen);
 int compat_sock_common_getsockopt(struct socket *sock, int level,
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 8d6b983d5099..f87599d5af82 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -349,8 +349,7 @@ void tcp_v4_early_demux(struct sk_buff *skb);
 int tcp_v4_rcv(struct sk_buff *skb);
 
 int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
-int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		size_t size);
+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);
 void tcp_release_cb(struct sock *sk);
@@ -430,8 +429,8 @@ int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
 			  char __user *optval, unsigned int optlen);
 void tcp_set_keepalive(struct sock *sk, int val);
 void tcp_syn_ack_timeout(struct sock *sk, struct request_sock *req);
-int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		size_t len, int nonblock, int flags, int *addr_len);
+int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
+		int flags, int *addr_len);
 void tcp_parse_options(const struct sk_buff *skb,
 		       struct tcp_options_received *opt_rx,
 		       int estab, struct tcp_fastopen_cookie *foc);
diff --git a/include/net/udp.h b/include/net/udp.h
index 32d8d9f07f76..6d4ed18e1427 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -238,8 +238,7 @@ int udp_get_port(struct sock *sk, unsigned short snum,
 		 int (*saddr_cmp)(const struct sock *,
 				  const struct sock *));
 void udp_err(struct sk_buff *, u32);
-int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		size_t len);
+int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len);
 int udp_push_pending_frames(struct sock *sk);
 void udp_flush_pending_frames(struct sock *sk);
 void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst);