From f00c698696f6424d205ce98dd9bfc0e3f0a7cf6e Mon Sep 17 00:00:00 2001
From: hanabi1224 <harlowmoo@gmail.com>
Date: Tue, 2 May 2023 13:12:09 +0800
Subject: [PATCH] fix: create tmp file at the same mount point during snapshot
 export

---
 node/rpc/src/chain_api.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/node/rpc/src/chain_api.rs b/node/rpc/src/chain_api.rs
index a8fdbaec4a2b..119ce72e019c 100644
--- a/node/rpc/src/chain_api.rs
+++ b/node/rpc/src/chain_api.rs
@@ -85,7 +85,11 @@ where
         ))?;
     }
 
-    let tmp_file = NamedTempFile::new()?;
+    let output_dir = output_path.parent().ok_or_else(|| JsonRpcError::Provided {
+        code: http::StatusCode::INTERNAL_SERVER_ERROR.as_u16() as _,
+        message: "Failed to determine snapshot export directory",
+    })?;
+    let tmp_file = NamedTempFile::new_in(output_dir)?;
     let head = data.chain_store.tipset_from_keys(&tsk)?;
     let start_ts = data.chain_store.tipset_by_height(epoch, head, true)?;