--- /dev/null
+// -*- mode:c++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * ceph - scalable distributed file system
+ *
+ * copyright (c) 2014 john spray <john.spray@inktank.com>
+ *
+ * this is free software; you can redistribute it and/or
+ * modify it under the terms of the gnu lesser general public
+ * license version 2.1, as published by the free software
+ * foundation. see file copying.
+ */
+
+
+#ifndef JOURNAL_FILTER_H
+#define JOURNAL_FILTER_H
+
+#include "mds/mdstypes.h"
+#include "mds/LogEvent.h"
+
+/**
+ * A set of conditions for narrowing down a search through the journal
+ */
+class JournalFilter
+{
+ private:
+
+ /* Filtering by journal offset range */
+ uint64_t range_start;
+ uint64_t range_end;
+ static const std::string range_separator;
+
+ /* Filtering by file (sub) path */
+ std::string path_expr;
+
+ /* Filtering by inode */
+ inodeno_t inode;
+
+ /* Filtering by type */
+ LogEvent::EventType event_type;
+
+ /* Filtering by dirfrag */
+ dirfrag_t frag;
+ std::string frag_dentry; //< optional, filter dentry name within fragment
+
+ /* Filtering by metablob client name */
+ entity_name_t client_name;
+
+ public:
+ JournalFilter() :
+ range_start(0),
+ range_end(-1),
+ inode(0),
+ event_type(0) {}
+
+ bool get_range(uint64_t &start, uint64_t &end) const;
+ bool apply(uint64_t pos, LogEvent &le) const;
+ int parse_args(
+ std::vector<const char*> &argv,
+ std::vector<const char*>::iterator &arg);
+};
+
+#endif // JOURNAL_FILTER_H
+