Remove old ioring log device (#158)

* Delete obsolete files.

* Add more metrics to IoRingLogDevice2 and verify them in the sim test.

src/llfs/confirm.hpp

@@ -10,13 +10,20 @@
 #ifndef LLFS_CONFIRM_HPP
 #define LLFS_CONFIRM_HPP
 
+#include <ostream>
+
 namespace llfs {
 
 enum struct ConfirmThisWillEraseAllMyData : bool {
   kNo = false,
   kYes = true,
 };
 
+inline std::ostream& operator<<(std::ostream& out, const ConfirmThisWillEraseAllMyData& t)
+{
+  return out << (bool)t;
+}
+
 }  // namespace llfs
 
 #endif  // LLFS_CONFIRM_HPP

src/llfs/ioring_log_config2.cpp

@@ -11,6 +11,9 @@
 
 #include <llfs/log_device_config2.hpp>
 
+#include <batteries/checked_cast.hpp>
+#include <batteries/math.hpp>
+
 namespace llfs {
 
 //==#==========+==+=+=++=+++++++++++-+-+--+----- --- -- -  -  -   -
@@ -27,4 +30,24 @@ namespace llfs {
   };
 }
 
+//==#==========+==+=+=++=+++++++++++-+-+--+----- --- -- -  -  -   -
+//
+/*static*/ IoRingLogConfig2 IoRingLogConfig2::from_logical_size(u64 logical_size,
+                                                                Optional<u64> opt_device_page_size,
+                                                                Optional<u64> opt_data_alignment)
+{
+  const u64 device_page_size = opt_device_page_size.value_or(Self::kDefaultDevicePageSize);
+  const u64 data_alignment = opt_data_alignment.value_or(Self::kDefaultDataAlignment);
+
+  const i32 device_page_size_log2 = batt::log2_ceil(device_page_size);
+  const i32 data_alignment_log2 = batt::log2_ceil(data_alignment);
+
+  return IoRingLogConfig2{
+      .control_block_offset = 0,
+      .log_capacity = batt::round_up_bits(data_alignment_log2, logical_size),
+      .device_page_size_log2 = BATT_CHECKED_CAST(u16, device_page_size_log2),
+      .data_alignment_log2 = BATT_CHECKED_CAST(u16, data_alignment_log2),
+  };
+}
+
 }  //namespace llfs

src/llfs/ioring_log_config2.hpp

@@ -15,16 +15,35 @@
 
 #include <llfs/file_offset_ptr.hpp>
 #include <llfs/int_types.hpp>
-#include <llfs/ioring_log_config2.hpp>
+#include <llfs/interval.hpp>
 
 namespace llfs {
 
 struct PackedLogDeviceConfig2;
 
 struct IoRingLogConfig2 {
+  using Self = IoRingLogConfig2;
+
+  //+++++++++++-+-+--+----- --- -- -  -  -   -
+
+  static constexpr usize kDefaultDevicePageSize = 512;
+  static constexpr usize kDefaultDataAlignment = 4096;
+
+  static constexpr u16 kDefaultDevicePageSizeLog2 = 9 /*=log2(512)*/;
+  static constexpr u16 kDefaultDataAlignmentLog2 = 12 /*=log2(4096)*/;
+
+  static_assert((usize{1} << Self::kDefaultDevicePageSizeLog2) == Self::kDefaultDevicePageSize);
+  static_assert((usize{1} << Self::kDefaultDataAlignmentLog2) == Self::kDefaultDataAlignment);
+
+  //+++++++++++-+-+--+----- --- -- -  -  -   -
+
   static IoRingLogConfig2 from_packed(
       const FileOffsetPtr<const PackedLogDeviceConfig2&>& packed_config);
 
+  static IoRingLogConfig2 from_logical_size(u64 logical_size,
+                                            Optional<u64> opt_device_page_size = None,
+                                            Optional<u64> opt_data_alignment = None);
+
   //+++++++++++-+-+--+----- --- -- -  -  -   -
 
   i64 control_block_offset;
@@ -38,6 +57,15 @@ struct IoRingLogConfig2 {
   {
     return i64{1} << this->data_alignment_log2;
   }
+
+  Interval<i64> offset_range() const noexcept
+  {
+    return Interval<i64>{
+        .lower_bound = this->control_block_offset,
+        .upper_bound = this->control_block_offset + this->control_block_size() +
+                       static_cast<i64>(this->log_capacity),
+    };
+  }
 };
 
 }  //namespace llfs