bcachefs: thread_with_file: create ops structure for thread_with_stdio

Create an ops structure so we can add more file-based functionality in
the next few patches.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 10 insertions, 6 deletions

diff --git a/fs/bcachefs/thread_with_file.h b/fs/bcachefs/thread_with_file.h
index e20f2d17ee59..5361611edb4c 100644
--- a/fs/bcachefs/thread_with_file.h
+++ b/fs/bcachefs/thread_with_file.h
@@ -49,19 +49,23 @@ int bch2_run_thread_with_file(struct thread_with_file *,
 			      const struct file_operations *,
 			      int (*fn)(void *));
 
+struct thread_with_stdio;
+
+struct thread_with_stdio_ops {
+	void (*exit)(struct thread_with_stdio *);
+	void (*fn)(struct thread_with_stdio *);
+};
+
 struct thread_with_stdio {
 	struct thread_with_file	thr;
 	struct stdio_redirect	stdio;
-	void			(*exit)(struct thread_with_stdio *);
-	void			(*fn)(struct thread_with_stdio *);
+	const struct thread_with_stdio_ops	*ops;
 };
 
 int bch2_run_thread_with_stdio(struct thread_with_stdio *,
-			       void (*exit)(struct thread_with_stdio *),
-			       void (*fn)(struct thread_with_stdio *));
+			       const struct thread_with_stdio_ops *);
 int bch2_run_thread_with_stdout(struct thread_with_stdio *,
-				void (*exit)(struct thread_with_stdio *),
-				void (*fn)(struct thread_with_stdio *));
+				const struct thread_with_stdio_ops *);
 int bch2_stdio_redirect_read(struct stdio_redirect *, char *, size_t);
 int bch2_stdio_redirect_readline(struct stdio_redirect *, char *, size_t);