diff --git a/include/dwarfs/block_cache.h b/include/dwarfs/block_cache.h
index 225512f2..30f8350d 100644
--- a/include/dwarfs/block_cache.h
+++ b/include/dwarfs/block_cache.h
@@ -28,6 +28,7 @@
 #include <memory>
 
 #include "dwarfs/block_compressor.h"
+#include "dwarfs/block_range.h"
 #include "dwarfs/fstypes.h"
 
 namespace dwarfs {
@@ -35,7 +36,6 @@ namespace dwarfs {
 struct block_cache_options;
 struct cache_tidy_config;
 
-class block_range;
 class fs_section;
 class logger;
 class mmif;
diff --git a/include/dwarfs/block_range.h b/include/dwarfs/block_range.h
new file mode 100644
index 00000000..9316c694
--- /dev/null
+++ b/include/dwarfs/block_range.h
@@ -0,0 +1,48 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/**
+ * \author     Marcus Holland-Moritz (github@mhxnet.de)
+ * \copyright  Copyright (c) Marcus Holland-Moritz
+ *
+ * This file is part of dwarfs.
+ *
+ * dwarfs is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * dwarfs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with dwarfs.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <memory>
+
+namespace dwarfs {
+
+class cached_block;
+
+class block_range {
+ public:
+  block_range(uint8_t const* data, size_t offset, size_t size);
+  block_range(std::shared_ptr<cached_block const> block, size_t offset,
+              size_t size);
+
+  uint8_t const* data() const { return begin_; }
+  uint8_t const* begin() const { return begin_; }
+  uint8_t const* end() const { return end_; }
+  size_t size() const { return end_ - begin_; }
+
+ private:
+  uint8_t const* const begin_;
+  uint8_t const* const end_;
+  std::shared_ptr<cached_block const> block_;
+};
+
+} // namespace dwarfs
diff --git a/include/dwarfs/filesystem_v2.h b/include/dwarfs/filesystem_v2.h
index 17701812..fa8a854c 100644
--- a/include/dwarfs/filesystem_v2.h
+++ b/include/dwarfs/filesystem_v2.h
@@ -35,6 +35,7 @@
 #include <folly/Expected.h>
 #include <folly/dynamic.h>
 
+#include "dwarfs/block_range.h"
 #include "dwarfs/fstypes.h"
 #include "dwarfs/metadata_types.h"
 #include "dwarfs/types.h"
diff --git a/include/dwarfs/fstypes.h b/include/dwarfs/fstypes.h
index 6eb7e8c7..d589b6da 100644
--- a/include/dwarfs/fstypes.h
+++ b/include/dwarfs/fstypes.h
@@ -24,46 +24,13 @@
 #include <cstddef>
 #include <cstdint>
 #include <iosfwd>
-#include <memory>
 #include <string>
 
-#include <folly/portability/IOVec.h>
-#include <folly/small_vector.h>
-
 #include "dwarfs/block_compressor.h" // TODO: or the other way round?
 #include "dwarfs/checksum.h"
 
 namespace dwarfs {
 
-class cached_block;
-
-// TODO: move elsewhere
-class block_range {
- public:
-  block_range(uint8_t const* data, size_t offset, size_t size);
-  block_range(std::shared_ptr<cached_block const> block, size_t offset,
-              size_t size);
-
-  uint8_t const* data() const { return begin_; }
-  uint8_t const* begin() const { return begin_; }
-  uint8_t const* end() const { return end_; }
-  size_t size() const { return end_ - begin_; }
-
- private:
-  uint8_t const* const begin_;
-  uint8_t const* const end_;
-  std::shared_ptr<cached_block const> block_;
-};
-
-// TODO: move elsewhere
-struct iovec_read_buf {
-  // This covers more than 95% of reads
-  static constexpr size_t inline_storage = 16;
-
-  folly::small_vector<struct ::iovec, inline_storage> buf;
-  folly::small_vector<block_range, inline_storage> ranges;
-};
-
 constexpr uint8_t MAJOR_VERSION = 2;
 constexpr uint8_t MINOR_VERSION = 5;
 
diff --git a/include/dwarfs/inode_reader_v2.h b/include/dwarfs/inode_reader_v2.h
index 07a77254..5ac3125d 100644
--- a/include/dwarfs/inode_reader_v2.h
+++ b/include/dwarfs/inode_reader_v2.h
@@ -28,6 +28,7 @@
 
 #include <folly/Expected.h>
 
+#include "dwarfs/block_range.h"
 #include "dwarfs/metadata_types.h"
 #include "dwarfs/types.h"
 
diff --git a/include/dwarfs/iovec_read_buf.h b/include/dwarfs/iovec_read_buf.h
new file mode 100644
index 00000000..c9fee6fb
--- /dev/null
+++ b/include/dwarfs/iovec_read_buf.h
@@ -0,0 +1,39 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/**
+ * \author     Marcus Holland-Moritz (github@mhxnet.de)
+ * \copyright  Copyright (c) Marcus Holland-Moritz
+ *
+ * This file is part of dwarfs.
+ *
+ * dwarfs is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * dwarfs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with dwarfs.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <folly/portability/IOVec.h>
+#include <folly/small_vector.h>
+
+#include "dwarfs/block_range.h"
+
+namespace dwarfs {
+
+struct iovec_read_buf {
+  // This covers more than 95% of reads
+  static constexpr size_t inline_storage = 16;
+
+  folly::small_vector<struct ::iovec, inline_storage> buf;
+  folly::small_vector<block_range, inline_storage> ranges;
+};
+
+} // namespace dwarfs
diff --git a/src/dwarfs/inode_reader_v2.cpp b/src/dwarfs/inode_reader_v2.cpp
index ac29a4a0..0d8e86f9 100644
--- a/src/dwarfs/inode_reader_v2.cpp
+++ b/src/dwarfs/inode_reader_v2.cpp
@@ -36,6 +36,7 @@
 #include "dwarfs/block_cache.h"
 #include "dwarfs/fstypes.h"
 #include "dwarfs/inode_reader_v2.h"
+#include "dwarfs/iovec_read_buf.h"
 #include "dwarfs/logger.h"
 #include "dwarfs/offset_cache.h"
 #include "dwarfs/performance_monitor.h"
diff --git a/src/dwarfs_main.cpp b/src/dwarfs_main.cpp
index f6a4a5f4..f54695d7 100644
--- a/src/dwarfs_main.cpp
+++ b/src/dwarfs_main.cpp
@@ -66,6 +66,7 @@
 #include "dwarfs/file_stat.h"
 #include "dwarfs/filesystem_v2.h"
 #include "dwarfs/fstypes.h"
+#include "dwarfs/iovec_read_buf.h"
 #include "dwarfs/logger.h"
 #include "dwarfs/metadata_v2.h"
 #include "dwarfs/mmap.h"
diff --git a/test/dwarfs_benchmark.cpp b/test/dwarfs_benchmark.cpp
index 824be44d..7aa9464c 100644
--- a/test/dwarfs_benchmark.cpp
+++ b/test/dwarfs_benchmark.cpp
@@ -31,6 +31,7 @@
 #include "dwarfs/file_stat.h"
 #include "dwarfs/filesystem_v2.h"
 #include "dwarfs/filesystem_writer.h"
+#include "dwarfs/iovec_read_buf.h"
 #include "dwarfs/logger.h"
 #include "dwarfs/options.h"
 #include "dwarfs/progress.h"