From: Dhairya Parmar <dparmar@redhat.com>
Date: Wed, 20 May 2026 21:18:15 +0000 (+0530)
Subject: mds: persist session auth_name in ESession journal event
X-Git-Tag: v21.0.1~87^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=4b059084d33023d7b220739509551c830926b05d;p=ceph.git

mds: persist session auth_name in ESession journal event

So that it can be applied to the freshly creation session which happens
while recreating session in ESession::replay when the OMAP version fell
behind the ESession cmapv and the newly creation session would be
rejected as target when a client tries to reclaim this session.

Fixes: https://tracker.ceph.com/issues/76728
Signed-off-by: Dhairya Parmar <dparmar@redhat.com>
---

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 8a36adf7c53..688c21d3364 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -816,7 +816,8 @@ void Server::handle_client_session(const cref_t<MClientSession> &m)
         ceph_assert(r == 0);
         log_session_status("ACCEPTED", "");
       });
-      mdlog->submit_entry(new ESession(m->get_source_inst(), true, pv, client_metadata),
+      mdlog->submit_entry(new ESession(m->get_source_inst(), true, pv,
+      client_metadata, session->info.auth_name),
 				new C_MDS_session_finish(this, session, sseq, true, pv, fin));
       mdlog->flush();
     }
@@ -1536,7 +1537,8 @@ void Server::journal_close_session(Session *session, int state, Context *on_safe
   } else
     piv = 0;
   
-  auto le = new ESession(session->info.inst, false, pv, inos_to_free, piv, session->delegated_inos);
+  auto le = new ESession(session->info.inst, false, pv, inos_to_free, piv,
+    session->delegated_inos, session->info.auth_name);
   auto fin = new C_MDS_session_finish(this, session, sseq, false, pv, inos_to_free, piv,
 				      session->delegated_inos, mdlog->get_current_segment(), on_safe);
   mdlog->submit_entry(le, fin);
diff --git a/src/mds/events/ESession.h b/src/mds/events/ESession.h
index ae9e7747148..58f6decb870 100644
--- a/src/mds/events/ESession.h
+++ b/src/mds/events/ESession.h
@@ -35,18 +35,22 @@ class ESession : public LogEvent {
   // Client metadata stored during open
   client_metadata_t client_metadata;
 
+  // persist auth_name to allow journal recreated session to be reclaimed
+  EntityName auth_name;
+
  public:
   ESession() : LogEvent(EVENT_SESSION), open(false) { }
   ESession(const entity_inst_t& inst, bool o, version_t v,
-	   const client_metadata_t& cm) :
+	   const client_metadata_t& cm, EntityName auth_name_) :
     LogEvent(EVENT_SESSION),
     client_inst(inst), open(o), cmapv(v), inotablev(0),
-    client_metadata(cm) { }
+    client_metadata(cm), auth_name(auth_name_) { }
   ESession(const entity_inst_t& inst, bool o, version_t v,
 	   const interval_set<inodeno_t>& to_free, version_t iv,
-	   const interval_set<inodeno_t>& to_purge) :
+	   const interval_set<inodeno_t>& to_purge, EntityName auth_name_) :
     LogEvent(EVENT_SESSION), client_inst(inst), open(o), cmapv(v),
-    inos_to_free(to_free), inotablev(iv), inos_to_purge(to_purge) {}
+    inos_to_free(to_free), inotablev(iv), inos_to_purge(to_purge),
+    auth_name(auth_name_) {}
 
   void encode(bufferlist& bl, uint64_t features) const override;
   void decode(bufferlist::const_iterator& bl) override;
diff --git a/src/mds/journal.cc b/src/mds/journal.cc
index 3b82337f00d..5891f37e5ad 100644
--- a/src/mds/journal.cc
+++ b/src/mds/journal.cc
@@ -1894,6 +1894,9 @@ void ESession::replay(MDSRank *mds)
       session = mds->sessionmap.get_or_add_session(client_inst);
       mds->sessionmap.set_state(session, Session::STATE_OPEN);
       session->set_client_metadata(client_metadata);
+      if (session->info.auth_name.to_str().empty()) {
+        session->info.auth_name = auth_name;
+      }
       dout(10) << " opened session " << session->info.inst << dendl;
     } else {
       session = mds->sessionmap.get_session(client_inst.name);
@@ -1943,7 +1946,7 @@ void ESession::replay(MDSRank *mds)
 
 void ESession::encode(bufferlist &bl, uint64_t features) const
 {
-  ENCODE_START(6, 5, bl);
+  ENCODE_START(7, 5, bl);
   encode(stamp, bl);
   encode(client_inst, bl, features);
   encode(open, bl);
@@ -1952,12 +1955,13 @@ void ESession::encode(bufferlist &bl, uint64_t features) const
   encode(inotablev, bl);
   encode(client_metadata, bl);
   encode(inos_to_purge, bl);
+  encode(auth_name, bl);
   ENCODE_FINISH(bl);
 }
 
 void ESession::decode(bufferlist::const_iterator &bl)
 {
-  DECODE_START_LEGACY_COMPAT_LEN(6, 3, 3, bl);
+  DECODE_START_LEGACY_COMPAT_LEN(7, 3, 3, bl);
   if (struct_v >= 2)
     decode(stamp, bl);
   decode(client_inst, bl);
@@ -1973,6 +1977,9 @@ void ESession::decode(bufferlist::const_iterator &bl)
   if (struct_v >= 6){
     decode(inos_to_purge, bl);
   }
+  if (struct_v >= 7) {
+    decode(auth_name, bl);
+  }
     
   DECODE_FINISH(bl);
 }