[RFC PATCH v4 04/16] io_uring: separate header for exported net bits

[David Wei <dw@davidwei.uk>]

From: Pavel Begunkov <asml.silence@gmail.com>

We're exporting some io_uring bits to networking, e.g. for implementing
a net callback for io_uring cmds, but we don't want to expose more than
needed. Add a separate header for networking.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: David Wei <dw@davidwei.uk>
---
 include/linux/io_uring.h     |  6 ------
 include/linux/io_uring/net.h | 18 ++++++++++++++++++
 io_uring/uring_cmd.c         |  1 +
 net/socket.c                 |  2 +-
 4 files changed, 20 insertions(+), 7 deletions(-)
 create mode 100644 include/linux/io_uring/net.h

diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 68ed6697fece..e123d5e17b52 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -11,7 +11,6 @@ void __io_uring_cancel(bool cancel_all);
 void __io_uring_free(struct task_struct *tsk);
 void io_uring_unreg_ringfd(void);
 const char *io_uring_get_opcode(u8 opcode);
-int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags);
 bool io_is_uring_fops(struct file *file);
 
 static inline void io_uring_files_cancel(void)
@@ -45,11 +44,6 @@ static inline const char *io_uring_get_opcode(u8 opcode)
 {
 	return "";
 }
-static inline int io_uring_cmd_sock(struct io_uring_cmd *cmd,
-				    unsigned int issue_flags)
-{
-	return -EOPNOTSUPP;
-}
 static inline bool io_is_uring_fops(struct file *file)
 {
 	return false;
diff --git a/include/linux/io_uring/net.h b/include/linux/io_uring/net.h
new file mode 100644
index 000000000000..b58f39fed4d5
--- /dev/null
+++ b/include/linux/io_uring/net.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _LINUX_IO_URING_NET_H
+#define _LINUX_IO_URING_NET_H
+
+struct io_uring_cmd;
+
+#if defined(CONFIG_IO_URING)
+int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags);
+
+#else
+static inline int io_uring_cmd_sock(struct io_uring_cmd *cmd,
+				    unsigned int issue_flags)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+#endif
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index 42f63adfa54a..0b504b33806c 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -3,6 +3,7 @@
 #include <linux/errno.h>
 #include <linux/file.h>
 #include <linux/io_uring/cmd.h>
+#include <linux/io_uring/net.h>
 #include <linux/security.h>
 #include <linux/nospec.h>
 #include <net/sock.h>
diff --git a/net/socket.c b/net/socket.c
index ed3df2f749bf..c69cd0e652b8 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -88,7 +88,7 @@
 #include <linux/xattr.h>
 #include <linux/nospec.h>
 #include <linux/indirect_call_wrapper.h>
-#include <linux/io_uring.h>
+#include <linux/io_uring/net.h>
 
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
-- 
2.43.0