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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_CLIENT_SNAPREALM_H
#define CEPH_CLIENT_SNAPREALM_H
#include "include/types.h"
#include "include/xlist.h"
#include "common/snap_types.h"
class Inode;
struct SnapRealm {
inodeno_t ino;
int nref;
snapid_t created;
snapid_t seq;
inodeno_t parent;
snapid_t parent_since;
vector<snapid_t> prior_parent_snaps; // snaps prior to parent_since
vector<snapid_t> my_snaps;
SnapRealm *pparent;
set<SnapRealm*> pchildren;
private:
SnapContext cached_snap_context; // my_snaps + parent snaps + past_parent_snaps
friend ostream& operator<<(ostream& out, const SnapRealm& r);
public:
xlist<Inode*> inodes_with_caps;
SnapRealm(inodeno_t i) :
ino(i), nref(0), created(0), seq(0),
pparent(NULL) { }
void build_snap_context();
void invalidate_cache() {
cached_snap_context.clear();
}
const SnapContext& get_snap_context() {
if (cached_snap_context.seq == 0)
build_snap_context();
return cached_snap_context;
}
void dump(Formatter *f) const;
};
inline ostream& operator<<(ostream& out, const SnapRealm& r) {
return out << "snaprealm(" << r.ino << " nref=" << r.nref << " c=" << r.created << " seq=" << r.seq
<< " parent=" << r.parent
<< " my_snaps=" << r.my_snaps
<< " cached_snapc=" << r.cached_snap_context
<< ")";
}
#endif
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