initial code repo

[stor4nfv.git] / src / ceph / src / tools / cephfs / JournalTool.h

diff --git a/src/ceph/src/tools/cephfs/JournalTool.h b/src/ceph/src/tools/cephfs/JournalTool.h
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+// -*- 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.
+ */
+
+#include "MDSUtility.h"
+#include "RoleSelector.h"
+#include <vector>
+
+#include "mds/mdstypes.h"
+#include "mds/LogEvent.h"
+#include "mds/events/EMetaBlob.h"
+
+#include "include/rados/librados.hpp"
+
+#include "JournalFilter.h"
+
+class JournalScanner;
+
+
+/**
+ * Command line tool for investigating and repairing filesystems
+ * with damaged metadata logs
+ */
+class JournalTool : public MDSUtility
+{
+  private:
+    MDSRoleSelector role_selector;
+    // Bit hacky, use this `rank` member to control behaviour of the
+    // various main_ functions.
+    mds_rank_t rank;
+
+    // Entry points
+    int main_journal(std::vector<const char*> &argv);
+    int main_header(std::vector<const char*> &argv);
+    int main_event(std::vector<const char*> &argv);
+
+    // Shared functionality
+    int recover_journal();
+
+    // Journal operations
+    int journal_inspect();
+    int journal_export(std::string const &path, bool import);
+    int journal_reset(bool hard);
+
+    // Header operations
+    int header_set();
+
+    // I/O handles
+    librados::Rados rados;
+    librados::IoCtx input;
+    librados::IoCtx output;
+
+    bool other_pool;
+
+    // Metadata backing store manipulation
+    int read_lost_found(std::set<std::string> &lost);
+    int recover_dentries(
+        EMetaBlob const &metablob,
+        bool const dry_run,
+        std::set<inodeno_t> *consumed_inos);
+
+    // Splicing
+    int erase_region(JournalScanner const &jp, uint64_t const pos, uint64_t const length);
+
+    // Backing store helpers
+    void encode_fullbit_as_inode(
+        const EMetaBlob::fullbit &fb,
+        const bool bare,
+        bufferlist *out_bl);
+    int consume_inos(const std::set<inodeno_t> &inos);
+
+  public:
+    void usage();
+    JournalTool() :
+      rank(0), other_pool(false) {}
+    int main(std::vector<const char*> &argv);
+};
+