From 138e13071be37d873344cd03e316c87ff8057ea0 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Thu, 9 Jun 2022 14:55:20 +0200
Subject: Fix garage_db build on 32-bit systems

---
 src/db/bin/convert.rs  |  9 +--------
 src/db/lmdb_adapter.rs | 14 ++++++++++++++
 src/garage/server.rs   |  7 +------
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/src/db/bin/convert.rs b/src/db/bin/convert.rs
index 9e45e61f..bbde2048 100644
--- a/src/db/bin/convert.rs
+++ b/src/db/bin/convert.rs
@@ -55,14 +55,7 @@ fn open_db(path: PathBuf, engine: String) -> Result<Db> {
 				Error(format!("Unable to create LMDB data directory: {}", e).into())
 			})?;
 
-			let map_size = if u32::MAX as usize == usize::MAX {
-				eprintln!(
-					"LMDB is not recommended on 32-bit systems, database size will be limited"
-				);
-				1usize << 30 // 1GB for 32-bit systems
-			} else {
-				1usize << 40 // 1TB for 64-bit systems
-			};
+			let map_size = lmdb_adapter::recommended_map_size();
 
 			let db = lmdb_adapter::heed::EnvOpenOptions::new()
 				.max_dbs(100)
diff --git a/src/db/lmdb_adapter.rs b/src/db/lmdb_adapter.rs
index 74622919..62fcc3e6 100644
--- a/src/db/lmdb_adapter.rs
+++ b/src/db/lmdb_adapter.rs
@@ -327,3 +327,17 @@ where
 		}
 	}
 }
+
+// ----
+
+#[cfg(target_pointer_width = "64")]
+pub fn recommended_map_size() -> usize {
+	1usize << 40
+}
+
+#[cfg(target_pointer_width = "32")]
+pub fn recommended_map_size() -> usize {
+	use log::warn;
+	warn!("LMDB is not recommended on 32-bit systems, database size will be limited");
+	1usize << 30
+}
diff --git a/src/garage/server.rs b/src/garage/server.rs
index 697d3358..7aa6185f 100644
--- a/src/garage/server.rs
+++ b/src/garage/server.rs
@@ -57,12 +57,7 @@ pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
 			db_path.push("db.lmdb");
 			info!("Opening LMDB database at: {}", db_path.display());
 			std::fs::create_dir_all(&db_path).expect("Unable to create LMDB data directory");
-			let map_size = if u32::MAX as usize == usize::MAX {
-				warn!("LMDB is not recommended on 32-bit systems, database size will be limited");
-				1usize << 30 // 1GB for 32-bit systems
-			} else {
-				1usize << 40 // 1TB for 64-bit systems
-			};
+			let map_size = garage_db::lmdb_adapter::recommended_map_size();
 
 			let db = db::lmdb_adapter::heed::EnvOpenOptions::new()
 				.max_dbs(100)
-- 
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