From 6d8c7738f3552a4d4f2820d8bd90f65838b9ab3d Mon Sep 17 00:00:00 2001
From: Mehran Kholdi <semekh@hamravesh.com>
Date: Thu, 1 Jul 2021 21:53:00 +0430
Subject: [PATCH] Do not create volumes smaller than 16MiB

XFS fails in formatting the volume with the following error:

```
agsize (2560 blocks) too small, need at least 4096 blocks
```
---
 rawfile_servicer.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rawfile_servicer.py b/rawfile_servicer.py
index 11a88d2..0f28f3d 100644
--- a/rawfile_servicer.py
+++ b/rawfile_servicer.py
@@ -166,7 +166,8 @@ class RawFileControllerServicer(csi_pb2_grpc.ControllerServicer):
         #         "PANIC! This should be handled by bd2fs!",
         #     )
 
-        size = request.capacity_range.required_bytes
+        MIN_SIZE = 16 * 1024 * 1024  # 16MiB: can't format xfs with smaller volumes
+        size = max(MIN_SIZE, request.capacity_range.required_bytes)
 
         try:
             node_name = request.accessibility_requirements.preferred[0].segments[