Function update_role_mapping

sql/sql_acl.cc:5357–5383

Updates the acl_roles_mappings hash @param user user name of the grantee @param host host name of the grantee @param role role name to grant @param with_admin WITH ADMIN OPTION flag @param existing the entry in the acl_roles_mappings hash or NULL. it is never NULL if revoke_grant is true. it is NULL

  @param revoke_grant   true for REVOKE, false for GRANT
*/
static int
update_role_mapping(LEX_CSTRING *user, LEX_CSTRING *host, LEX_CSTRING *role,
                    bool with_admin, ROLE_GRANT_PAIR *existing, bool revoke_grant)
{
  if (revoke_grant)
  {
    if (with_admin)
    {
      existing->with_admin= false;
      return 0;
    }
    return my_hash_delete(&acl_roles_mappings, (uchar*)existing);
  }

  if (existing)
  {
    existing->with_admin|= with_admin;
    return 0;
  }

  mysql_mutex_assert_owner(&acl_cache->lock);
  /* allocate a new entry that will go in the hash */
  ROLE_GRANT_PAIR *hash_entry= new (&acl_memroot) ROLE_GRANT_PAIR;
  if (hash_entry->init(&acl_memroot, *user, *host, *role, with_admin))
    return 1;
  return my_hash_insert(&acl_roles_mappings, (uchar*) hash_entry);
}

static void
acl_update_proxy_user(ACL_PROXY_USER *new_value, bool is_revoke)