[PATCH 3/8] fs: add file_operations->uring_cmd()

[Jens Axboe <axboe@kernel.dk>]

This is a file private handler, similar to ioctls but hopefully a lot
more sane and useful.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c      |  5 -----
 include/linux/fs.h | 11 +++++++++++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index a4699b066172..fecf10e0625f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -188,11 +188,6 @@ struct io_rings {
 	struct io_uring_cqe	cqes[] ____cacheline_aligned_in_smp;
 };
 
-enum io_uring_cmd_flags {
-	IO_URING_F_NONBLOCK		= 1,
-	IO_URING_F_COMPLETE_DEFER	= 2,
-};
-
 struct io_mapped_ubuf {
 	u64		ubuf;
 	size_t		len;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ec8f3ddf4a6a..009abc668987 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1884,6 +1884,15 @@ struct dir_context {
 #define REMAP_FILE_ADVISORY		(REMAP_FILE_CAN_SHORTEN)
 
 struct iov_iter;
+struct io_uring_cmd;
+
+/*
+ * f_op->uring_cmd() issue flags
+ */
+enum io_uring_cmd_flags {
+	IO_URING_F_NONBLOCK		= 1,
+	IO_URING_F_COMPLETE_DEFER	= 2,
+};
 
 struct file_operations {
 	struct module *owner;
@@ -1925,6 +1934,8 @@ struct file_operations {
 				   struct file *file_out, loff_t pos_out,
 				   loff_t len, unsigned int remap_flags);
 	int (*fadvise)(struct file *, loff_t, loff_t, int);
+
+	int (*uring_cmd)(struct io_uring_cmd *, enum io_uring_cmd_flags);
 } __randomize_layout;
 
 struct inode_operations {
-- 
2.31.0