From: Kotresh HR <khiremat@redhat.com>
Date: Mon, 24 Feb 2025 21:22:42 +0000 (+0530)
Subject: multimds: Consistent view of referent inode list
X-Git-Tag: v20.3.0~377^2~26
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=0ed8c2a2b1c106754fb7a1ddb35d39b7c48bcd28;p=ceph.git

multimds: Consistent view of referent inode list

Encode/Decode referent inode list with CEPH_LOCK_ILINK
lock along with ctime and nlink. This solves the consistent
view of the referent inode list to all it's inode replica mdses.

Fixes: https://tracker.ceph.com/issues/54205
Signed-off-by: Kotresh HR <khiremat@redhat.com>
---

diff --git a/src/mds/CInode.cc b/src/mds/CInode.cc
index 37892fabca2c9..e45219d87f2b6 100644
--- a/src/mds/CInode.cc
+++ b/src/mds/CInode.cc
@@ -1749,10 +1749,11 @@ void CInode::decode_lock_iauth(bufferlist::const_iterator& p)
 
 void CInode::encode_lock_ilink(bufferlist& bl)
 {
-  ENCODE_START(1, 1, bl);
+  ENCODE_START(2, 1, bl);
   encode(get_inode()->version, bl);
   encode(get_inode()->ctime, bl);
   encode(get_inode()->nlink, bl);
+  encode(get_inode()->referent_inodes, bl);
   ENCODE_FINISH(bl);
 }
 
@@ -1766,6 +1767,8 @@ void CInode::decode_lock_ilink(bufferlist::const_iterator& p)
   decode(tm, p);
   if (_inode->ctime < tm) _inode->ctime = tm;
   decode(_inode->nlink, p);
+  if (struct_v >= 2)
+    decode(_inode->referent_inodes, p);
   DECODE_FINISH(p);
   reset_inode(std::move(_inode));
 }