io_uring: Add io_uring command support for sockets
Enable io_uring commands on network sockets. Create two new
SOCKET_URING_OP commands that will operate on sockets.
In order to call ioctl on sockets, use the file_operations->io_uring_cmd
callbacks, and map it to a uring socket function, which handles the
SOCKET_URING_OP accordingly, and calls socket ioctls.
This patches was tested by creating a new test case in liburing.
Link: https://github.com/leitao/liburing/tree/io_uring_cmd
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230627134424.2784797-1-leitao@debian.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/net/socket.c b/net/socket.c
index 2b0e54b..1dc23f5 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -88,6 +88,7 @@
#include <linux/xattr.h>
#include <linux/nospec.h>
#include <linux/indirect_call_wrapper.h>
+#include <linux/io_uring.h>
#include <linux/uaccess.h>
#include <asm/unistd.h>
@@ -159,6 +160,7 @@ static const struct file_operations socket_file_ops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_sock_ioctl,
#endif
+ .uring_cmd = io_uring_cmd_sock,
.mmap = sock_mmap,
.release = sock_close,
.fasync = sock_fasync,
