From e6c6f52e548f50a497f5177ea8af14f528c796f3 Mon Sep 17 00:00:00 2001
From: Kotresh HR <khiremat@redhat.com>
Date: Tue, 25 Feb 2025 18:01:34 +0530
Subject: [PATCH] multi-mds/unlink: Handle rollback of referent_inodes list

The referent_inodes list needs to be rolled back if the
unlink operation involving multi-mds fails due to mds
going down. This patch takes care of the same.

Fixes: https://tracker.ceph.com/issues/54205
Signed-off-by: Kotresh HR <khiremat@redhat.com>
---
 src/mds/Server.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 5307cbfef3900..0901f7cff2d65 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -8355,6 +8355,11 @@ void Server::do_link_rollback(bufferlist &rbl, mds_rank_t leader, const MDReques
     }
   } else {
     pi.inode->nlink++;
+    if (rollback.referent_ino) {
+      pi.inode->add_referent_ino(rollback.referent_ino);
+      dout(10) << __func__ << " referent_inodes " << std::hex << pi.inode->get_referent_inodes()
+               << " referent ino added " << rollback.referent_ino << dendl;
+    }
   }
 
   map<client_t,ref_t<MClientSnap>> splits;
-- 
2.39.5