bcachefs: Initial commit

Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write
filesystem with every feature you could possibly want.

Website: https://bcachefs.org

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

1 files changed, 63 insertions, 0 deletions

diff --git a/fs/bcachefs/move.h b/fs/bcachefs/move.h
new file mode 100644
index 000000000000..3f7e31cc8f6e
--- /dev/null
+++ b/fs/bcachefs/move.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_MOVE_H
+#define _BCACHEFS_MOVE_H
+
+#include "btree_iter.h"
+#include "buckets.h"
+#include "io_types.h"
+#include "move_types.h"
+
+struct bch_read_bio;
+struct moving_context;
+
+enum data_cmd {
+	DATA_SKIP,
+	DATA_SCRUB,
+	DATA_ADD_REPLICAS,
+	DATA_REWRITE,
+	DATA_PROMOTE,
+};
+
+struct data_opts {
+	u16		target;
+	unsigned	rewrite_dev;
+	int		btree_insert_flags;
+};
+
+struct migrate_write {
+	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;
+};
+
+void bch2_migrate_read_done(struct migrate_write *, struct bch_read_bio *);
+int bch2_migrate_write_init(struct bch_fs *, struct migrate_write *,
+			    struct write_point_specifier,
+			    struct bch_io_opts,
+			    enum data_cmd, struct data_opts,
+			    struct bkey_s_c);
+
+typedef enum data_cmd (*move_pred_fn)(struct bch_fs *, void *,
+				enum bkey_type, struct bkey_s_c_extent,
+				struct bch_io_opts *, struct data_opts *);
+
+int bch2_move_data(struct bch_fs *, struct bch_ratelimit *,
+		   struct write_point_specifier,
+		   struct bpos, struct bpos,
+		   move_pred_fn, void *,
+		   struct bch_move_stats *);
+
+int bch2_data_job(struct bch_fs *,
+		  struct bch_move_stats *,
+		  struct bch_ioctl_data);
+
+#endif /* _BCACHEFS_MOVE_H */