From 71c0188055e25aa1c00d0226f0ca99ce323310a6 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Mon, 4 Sep 2023 14:49:49 +0200
Subject: block manager: skeleton for multi-hdd support

---
 src/block/layout.rs | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/block/layout.rs

(limited to 'src/block/layout.rs')

diff --git a/src/block/layout.rs b/src/block/layout.rs
new file mode 100644
index 00000000..cbc326d8
--- /dev/null
+++ b/src/block/layout.rs
@@ -0,0 +1,57 @@
+use std::path::PathBuf;
+
+use serde::{Deserialize, Serialize};
+
+use garage_util::config::DataDirEnum;
+use garage_util::data::Hash;
+use garage_util::migrate::*;
+
+pub const DRIVE_NPART: usize = 1024;
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub(crate) struct DataLayout {
+	pub(crate) data_dirs: Vec<DataDir>,
+	pub(crate) partitions: Vec<Partition>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub(crate) struct DataDir {
+	pub(crate) path: PathBuf,
+	pub(crate) state: DataDirState,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub(crate) enum DataDirState {
+	Active { capacity: u64 },
+	ReadOnly,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+pub(crate) struct Partition {
+	pub(crate) prim: usize,
+	pub(crate) sec: Vec<usize>,
+}
+
+impl DataLayout {
+	pub(crate) fn initialize(dirs: &DataDirEnum) -> Self {
+		todo!()
+	}
+
+	pub(crate) fn update(&mut self, dirs: &DataDirEnum) -> Self {
+		todo!()
+	}
+
+	pub(crate) fn data_dir(&self, hash: &Hash) -> PathBuf {
+		todo!()
+		/*
+		let mut path = self.data_dir.clone();
+		path.push(hex::encode(&hash.as_slice()[0..1]));
+		path.push(hex::encode(&hash.as_slice()[1..2]));
+		path
+		*/
+	}
+}
+
+impl InitialFormat for DataLayout {
+	const VERSION_MARKER: &'static [u8] = b"G09bmdl";
+}
-- 
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