+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-#ifndef CEPH_INODE_BACKTRACE_H
-#define CEPH_INODE_BACKTRACE_H
-
-#include "mdstypes.h"
-
-namespace ceph {
- class Formatter;
-}
-
-/** metadata backpointers **/
-
-/*
- * - inode_backpointer_t is just the _pointer_ portion; it doesn't
- * tell us who we point _from_.
- *
- * - it _does_ include a version of the source object, so we can look
- * at two different pointers (from the same inode) and tell which is
- * newer.
- */
-struct inode_backpointer_t {
- inodeno_t dirino; // containing directory ino
- string dname; // linking dentry name
- version_t version; // child's version at time of backpointer creation
-
- inode_backpointer_t() : version(0) {}
- inode_backpointer_t(inodeno_t i, const string &d, version_t v) : dirino(i), dname(d), version(v) {}
-
- void encode(bufferlist& bl) const;
- void decode(bufferlist::iterator &bl);
- void decode_old(bufferlist::iterator &bl);
- void dump(Formatter *f) const;
- static void generate_test_instances(list<inode_backpointer_t*>& ls);
-};
-WRITE_CLASS_ENCODER(inode_backpointer_t)
-
-inline bool operator==(const inode_backpointer_t& l, const inode_backpointer_t& r) {
- return l.dirino == r.dirino && l.version == r.version && l.dname == r.dname;
-}
-
-inline ostream& operator<<(ostream& out, const inode_backpointer_t& ib) {
- return out << "<" << ib.dirino << "/" << ib.dname << " v" << ib.version << ">";
-}
-
-/*
- * inode_backtrace_t is a complete ancestor backtraces for a given inode.
- * we include who _we_ are, so that the backtrace can stand alone (as, say,
- * an xattr on an object).
- */
-struct inode_backtrace_t {
- inodeno_t ino; // my ino
- vector<inode_backpointer_t> ancestors;
- int64_t pool;
- // we use a set for old_pools to avoid duplicate entries, e.g. setlayout 0, 1, 0
- set<int64_t> old_pools;
-
- inode_backtrace_t() : pool(-1) {}
-
- void encode(bufferlist& bl) const;
- void decode(bufferlist::iterator &bl);
- void dump(Formatter *f) const;
- static void generate_test_instances(list<inode_backtrace_t*>& ls);
-
- /**
- * Compare two backtraces *for the same inode*.
- * @pre The backtraces are for the same inode
- *
- * @param other The backtrace to compare ourselves with
- * @param equivalent A bool pointer which will be set to true if
- * the other backtrace is equivalent to our own (has the same dentries)
- * @param divergent A bool pointer which will be set to true if
- * the backtraces have differing entries without versions supporting them
- *
- * @returns 1 if we are newer than the other, 0 if equal, -1 if older
- */
- int compare(const inode_backtrace_t& other,
- bool *equivalent, bool *divergent) const;
-};
-WRITE_CLASS_ENCODER(inode_backtrace_t)
-
-inline ostream& operator<<(ostream& out, const inode_backtrace_t& it) {
- return out << "(" << it.pool << ")" << it.ino << ":" << it.ancestors << "//" << it.old_pools;
-}
-
-inline bool operator==(const inode_backtrace_t& l,
- const inode_backtrace_t& r) {
- return l.ino == r.ino &&
- l.pool == r.pool &&
- l.old_pools == r.old_pools &&
- l.ancestors == r.ancestors;
-}
-
-#endif
-