io_uring: unify getting ctx from passed in file descriptor

io_uring_enter() and io_uring_register() end up having duplicated code
for getting a ctx from a passed in file descriptor, for either a
registered ring descriptor or a normal file descriptor. Move the
io_uring_register_get_file() into io_uring.c and name it a bit more
generically, and use it from both callsites rather than have that logic
and handling duplicated.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 0 deletions

diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 91cf67b5d85b..e43995682c8b 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -173,6 +173,7 @@ void io_req_track_inflight(struct io_kiocb *req);
 struct file *io_file_get_normal(struct io_kiocb *req, int fd);
 struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
 			       unsigned issue_flags);
+struct file *io_uring_ctx_get_file(unsigned int fd, bool registered);
 
 void io_req_task_queue(struct io_kiocb *req);
 void io_req_task_complete(struct io_tw_req tw_req, io_tw_token_t tw);