bcachefs: Pull out data_update.c

This is the start of reorganizing the data IO paths. The plan is to also
break apart io.c into data_read.c and data_write.c, and migrate_write
will be renamed to the data_update path.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 48 insertions, 0 deletions

diff --git a/fs/bcachefs/data_update.h b/fs/bcachefs/data_update.h
new file mode 100644
index 000000000000..03b4ca5a4ee8
--- /dev/null
+++ b/fs/bcachefs/data_update.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _BCACHEFS_DATA_UPDATE_H
+#define _BCACHEFS_DATA_UPDATE_H
+
+#include "io_types.h"
+
+enum data_cmd {
+	DATA_SKIP,
+	DATA_SCRUB,
+	DATA_ADD_REPLICAS,
+	DATA_REWRITE,
+	DATA_PROMOTE,
+};
+
+struct data_opts {
+	u16		target;
+	u8		rewrite_dev;
+	u8		nr_replicas;
+	int		btree_insert_flags;
+};
+
+struct data_update {
+	enum btree_id		btree_id;
+	enum data_cmd		data_cmd;
+	struct data_opts	data_opts;
+
+	unsigned		nr_ptrs_reserved;
+
+	struct moving_context	*ctxt;
+
+	/* what we read: */
+	struct bch_extent_ptr	ptr;
+	u64			offset;
+
+	struct bch_write_op	op;
+};
+
+int bch2_data_update_index_update(struct bch_write_op *);
+
+void bch2_data_update_read_done(struct data_update *, struct bch_read_bio *);
+int bch2_data_update_init(struct bch_fs *, struct data_update *,
+			  struct write_point_specifier,
+			  struct bch_io_opts,
+			  enum data_cmd, struct data_opts,
+			  enum btree_id, struct bkey_s_c);
+
+#endif /* _BCACHEFS_DATA_UPDATE_H */