move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / c_src / libbcachefs / btree_write_buffer.h

diff --git a/c_src/libbcachefs/btree_write_buffer.h b/c_src/libbcachefs/btree_write_buffer.h
new file mode 100644 (file)
index 0000000..eebcd2b
--- /dev/null
+++ b/c_src/libbcachefs/btree_write_buffer.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_BTREE_WRITE_BUFFER_H
+#define _BCACHEFS_BTREE_WRITE_BUFFER_H
+
+#include "bkey.h"
+
+static inline bool bch2_btree_write_buffer_should_flush(struct bch_fs *c)
+{
+       struct btree_write_buffer *wb = &c->btree_write_buffer;
+
+       return wb->inc.keys.nr + wb->flushing.keys.nr > wb->inc.keys.size / 4;
+}
+
+static inline bool bch2_btree_write_buffer_must_wait(struct bch_fs *c)
+{
+       struct btree_write_buffer *wb = &c->btree_write_buffer;
+
+       return wb->inc.keys.nr > wb->inc.keys.size * 3 / 4;
+}
+
+struct btree_trans;
+int bch2_btree_write_buffer_flush_sync(struct btree_trans *);
+int bch2_btree_write_buffer_flush_nocheck_rw(struct btree_trans *);
+int bch2_btree_write_buffer_tryflush(struct btree_trans *);
+
+struct journal_keys_to_wb {
+       struct btree_write_buffer_keys  *wb;
+       size_t                          room;
+       u64                             seq;
+};
+
+int bch2_journal_key_to_wb_slowpath(struct bch_fs *,
+                            struct journal_keys_to_wb *,
+                            enum btree_id, struct bkey_i *);
+
+static inline int bch2_journal_key_to_wb(struct bch_fs *c,
+                            struct journal_keys_to_wb *dst,
+                            enum btree_id btree, struct bkey_i *k)
+{
+       EBUG_ON(!dst->seq);
+
+       if (unlikely(!dst->room))
+               return bch2_journal_key_to_wb_slowpath(c, dst, btree, k);
+
+       struct btree_write_buffered_key *wb_k = &darray_top(dst->wb->keys);
+       wb_k->journal_seq       = dst->seq;
+       wb_k->btree             = btree;
+       bkey_copy(&wb_k->k, k);
+       dst->wb->keys.nr++;
+       dst->room--;
+       return 0;
+}
+
+void bch2_journal_keys_to_write_buffer_start(struct bch_fs *, struct journal_keys_to_wb *, u64);
+void bch2_journal_keys_to_write_buffer_end(struct bch_fs *, struct journal_keys_to_wb *);
+
+int bch2_btree_write_buffer_resize(struct bch_fs *, size_t);
+void bch2_fs_btree_write_buffer_exit(struct bch_fs *);
+int bch2_fs_btree_write_buffer_init(struct bch_fs *);
+
+#endif /* _BCACHEFS_BTREE_WRITE_BUFFER_H */