From cd0163da154367f5437ae1423bc97c450d74adf7 Mon Sep 17 00:00:00 2001
From: Chuyan Zhang <me@zcy.moe>
Date: Sat, 18 Nov 2023 02:15:11 -0800
Subject: I hate cache!

---
 src/disk/data_block.rs | 89 ++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 82 insertions(+), 7 deletions(-)

(limited to 'src/disk/data_block.rs')

diff --git a/src/disk/data_block.rs b/src/disk/data_block.rs
index 2160b91..9c8cc26 100644
--- a/src/disk/data_block.rs
+++ b/src/disk/data_block.rs
@@ -1,12 +1,54 @@
-pub trait Block: Default {}
+use crate::disk::inode::Inode;
+use libc::pathconf;
+
+pub trait Block: Default + Clone {}
+
+#[derive(Clone)]
+pub struct DataBlock(pub(crate) [u8; 4096]);
+
+impl Default for DataBlock {
+    fn default() -> Self {
+        Self([0; 4096])
+    }
+}
 
-#[derive(Default)]
-pub struct DataBlock([u8; 4096]);
 impl Block for DataBlock {}
 
+#[derive(Clone)]
+pub struct InodeBlock {
+    pub(crate) inodes: [Inode; 16],
+}
+
+impl Default for InodeBlock {
+    fn default() -> Self {
+        Self {
+            inodes: [
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+            ],
+        }
+    }
+}
+
+impl Block for InodeBlock {}
+
 const FULL_MAP: u32 = 0b111_111_111_111_111;
 
-#[derive(Default)]
+#[derive(Clone)]
 pub struct DirectoryBlock {
     entries: [[u8; 256]; 15],
     inode_ids: [usize; 15],
@@ -14,6 +56,17 @@ pub struct DirectoryBlock {
     reserved: [u8; 132],
 }
 
+impl Default for DirectoryBlock {
+    fn default() -> Self {
+        Self {
+            entries: [[0; 256]; 15],
+            inode_ids: [0; 15],
+            occupancy_map: 0,
+            reserved: [0xFF; 132],
+        }
+    }
+}
+
 impl Block for DirectoryBlock {}
 
 impl DirectoryBlock {
@@ -42,11 +95,17 @@ impl DirectoryBlock {
     }
 }
 
-#[derive(Default)]
+#[derive(Clone)]
 pub struct IndirectBlock {
     pub entries: [u32; 1024],
 }
 
+impl Default for IndirectBlock {
+    fn default() -> Self {
+        Self { entries: [0; 1024] }
+    }
+}
+
 impl Block for IndirectBlock {}
 
 impl IndirectBlock {
@@ -59,11 +118,19 @@ impl IndirectBlock {
     }
 }
 
-#[derive(Default)]
+#[derive(Clone)]
 pub struct DoubleIndirectBlock {
     pub indirect: [u32; 1024],
 }
 
+impl Default for DoubleIndirectBlock {
+    fn default() -> Self {
+        Self {
+            indirect: [0; 1024],
+        }
+    }
+}
+
 impl Block for DoubleIndirectBlock {}
 
 impl DoubleIndirectBlock {
@@ -76,11 +143,19 @@ impl DoubleIndirectBlock {
     }
 }
 
-#[derive(Default)]
+#[derive(Clone)]
 pub struct TripleIndirectBlock {
     pub double_indirect: [u32; 1024],
 }
 
+impl Default for TripleIndirectBlock {
+    fn default() -> Self {
+        Self {
+            double_indirect: [0; 1024],
+        }
+    }
+}
+
 impl Block for TripleIndirectBlock {}
 
 impl TripleIndirectBlock {
-- 
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