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diff --git a/storage/perfschema/pfs_account.h b/storage/perfschema/pfs_account.h
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+/* Copyright (c) 2010, 2023, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is also distributed with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have included with MySQL.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License, version 2.0, for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#ifndef PFS_ACCOUNT_H
+#define PFS_ACCOUNT_H
+
+/**
+  @file storage/perfschema/pfs_account.h
+  Performance schema account (declarations).
+*/
+
+#include "pfs_lock.h"
+#include "lf.h"
+#include "pfs_con_slice.h"
+#include "mysql_com.h" /* USERNAME_LENGTH */
+
+struct PFS_global_param;
+struct PFS_user;
+struct PFS_host;
+struct PFS_thread;
+struct PFS_memory_stat_delta;
+
+/**
+  @addtogroup Performance_schema_buffers
+  @{
+*/
+
+/** Hash key for an account. */
+struct PFS_account_key
+{
+  /**
+    Hash search key.
+    This has to be a string for LF_HASH,
+    the format is "<username><0x00><hostname><0x00>"
+  */
+  char m_hash_key[USERNAME_LENGTH + 1 + HOSTNAME_LENGTH + 1];
+  uint m_key_length;
+};
+
+/** Per account statistics. */
+struct PFS_ALIGNED PFS_account : PFS_connection_slice
+{
+public:
+  inline void init_refcount(void)
+  {
+    PFS_atomic::store_32(& m_refcount, 1);
+  }
+
+  inline int get_refcount(void)
+  {
+    return PFS_atomic::load_32(& m_refcount);
+  }
+
+  inline void inc_refcount(void)
+  {
+    PFS_atomic::add_32(& m_refcount, 1);
+  }
+
+  inline void dec_refcount(void)
+  {
+    PFS_atomic::add_32(& m_refcount, -1);
+  }
+
+  void aggregate(bool alive, PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_waits(PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_stages(PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_statements(PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_transactions(PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_memory(bool alive, PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_status(PFS_user *safe_user, PFS_host *safe_host);
+  void aggregate_stats(PFS_user *safe_user, PFS_host *safe_host);
+  void release(void);
+
+  void carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index);
+
+  /** Internal lock. */
+  pfs_lock m_lock;
+  PFS_account_key m_key;
+  /** True if this account is enabled, per rules in table SETUP_ACTORS. */
+  bool m_enabled;
+  /** True if this account has history enabled, per rules in table SETUP_ACTORS. */
+  bool m_history;
+  const char *m_username;
+  uint m_username_length;
+  const char *m_hostname;
+  uint m_hostname_length;
+  PFS_user *m_user;
+  PFS_host *m_host;
+
+  ulonglong m_disconnected_count;
+
+private:
+  int m_refcount;
+};
+
+int init_account(const PFS_global_param *param);
+void cleanup_account(void);
+int init_account_hash(const PFS_global_param *param);
+void cleanup_account_hash(void);
+
+PFS_account *
+find_or_create_account(PFS_thread *thread,
+                         const char *username, uint username_length,
+                         const char *hostname, uint hostname_length);
+
+PFS_account *sanitize_account(PFS_account *unsafe);
+void purge_all_account(void);
+
+void update_accounts_derived_flags(PFS_thread *thread);
+
+/* For show status. */
+
+extern LF_HASH account_hash;
+
+/** @} */
+#endif
+