From ce54fd9b995a5e28fbba462e5843c17ee58fea29 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Mon, 20 Nov 2017 09:30:50 -0600
Subject: [PATCH] os/bluestore: prevent mount if osd_max_object_size >= 4G

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit f284bbb0593eafc25013c01c8aa7b8bdfc39d906)
---
 src/os/bluestore/BlueStore.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 5fe5b98c5dd..5bb8dd0b2d5 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -4004,6 +4004,12 @@ int BlueStore::get_block_device_fsid(CephContext* cct, const string& path,
 
 int BlueStore::_open_path()
 {
+  // sanity check(s)
+  if (cct->_conf->get_val<uint64_t>("osd_max_object_size") >=
+      4*1024*1024*1024ull) {
+    derr << __func__ << " osd_max_object_size >= 4GB; BlueStore has hard limit of 4GB." << dendl;
+    return -EINVAL;
+  }
   assert(path_fd < 0);
   path_fd = TEMP_FAILURE_RETRY(::open(path.c_str(), O_DIRECTORY));
   if (path_fd < 0) {
-- 
2.47.3