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-rw-r--r--src/mds/snap.cc228
1 files changed, 228 insertions, 0 deletions
diff --git a/src/mds/snap.cc b/src/mds/snap.cc
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+++ b/src/mds/snap.cc
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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) 2004- Sage Weil <sage@newdream.net>
+ *
+ * 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 <string_view>
+
+#include "snap.h"
+
+#include "common/Formatter.h"
+
+/*
+ * SnapInfo
+ */
+
+void SnapInfo::encode(bufferlist& bl) const
+{
+ ENCODE_START(3, 2, bl);
+ encode(snapid, bl);
+ encode(ino, bl);
+ encode(stamp, bl);
+ encode(name, bl);
+ encode(metadata, bl);
+ ENCODE_FINISH(bl);
+}
+
+void SnapInfo::decode(bufferlist::const_iterator& bl)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(3, 2, 2, bl);
+ decode(snapid, bl);
+ decode(ino, bl);
+ decode(stamp, bl);
+ decode(name, bl);
+ if (struct_v >= 3) {
+ decode(metadata, bl);
+ }
+ DECODE_FINISH(bl);
+}
+
+void SnapInfo::dump(Formatter *f) const
+{
+ f->dump_unsigned("snapid", snapid);
+ f->dump_unsigned("ino", ino);
+ f->dump_stream("stamp") << stamp;
+ f->dump_string("name", name);
+ f->open_object_section("metadata");
+ for (auto &[key, value] : metadata) {
+ f->dump_string(key, value);
+ }
+ f->close_section();
+}
+
+void SnapInfo::generate_test_instances(std::list<SnapInfo*>& ls)
+{
+ ls.push_back(new SnapInfo);
+ ls.push_back(new SnapInfo);
+ ls.back()->snapid = 1;
+ ls.back()->ino = 2;
+ ls.back()->stamp = utime_t(3, 4);
+ ls.back()->name = "foo";
+ ls.back()->metadata = {{"foo", "bar"}};
+}
+
+ostream& operator<<(ostream& out, const SnapInfo &sn)
+{
+ return out << "snap(" << sn.snapid
+ << " " << sn.ino
+ << " '" << sn.name
+ << "' " << sn.stamp << ")";
+}
+
+std::string_view SnapInfo::get_long_name() const
+{
+ if (long_name.empty() ||
+ long_name.compare(1, name.size(), name) ||
+ long_name.find_last_of("_") != name.size() + 1) {
+ char nm[80];
+ snprintf(nm, sizeof(nm), "_%s_%llu", name.c_str(), (unsigned long long)ino);
+ long_name = nm;
+ }
+ return long_name;
+}
+
+/*
+ * snaplink_t
+ */
+
+void snaplink_t::encode(bufferlist& bl) const
+{
+ ENCODE_START(2, 2, bl);
+ encode(ino, bl);
+ encode(first, bl);
+ ENCODE_FINISH(bl);
+}
+
+void snaplink_t::decode(bufferlist::const_iterator& bl)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
+ decode(ino, bl);
+ decode(first, bl);
+ DECODE_FINISH(bl);
+}
+
+void snaplink_t::dump(Formatter *f) const
+{
+ f->dump_unsigned("ino", ino);
+ f->dump_unsigned("first", first);
+}
+
+void snaplink_t::generate_test_instances(std::list<snaplink_t*>& ls)
+{
+ ls.push_back(new snaplink_t);
+ ls.push_back(new snaplink_t);
+ ls.back()->ino = 2;
+ ls.back()->first = 123;
+}
+
+ostream& operator<<(ostream& out, const snaplink_t &l)
+{
+ return out << l.ino << "@" << l.first;
+}
+
+/*
+ * sr_t
+ */
+
+void sr_t::encode(bufferlist& bl) const
+{
+ ENCODE_START(6, 4, bl);
+ encode(seq, bl);
+ encode(created, bl);
+ encode(last_created, bl);
+ encode(last_destroyed, bl);
+ encode(current_parent_since, bl);
+ encode(snaps, bl);
+ encode(past_parents, bl);
+ encode(past_parent_snaps, bl);
+ encode(flags, bl);
+ ENCODE_FINISH(bl);
+}
+
+void sr_t::decode(bufferlist::const_iterator& p)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(6, 4, 4, p);
+ if (struct_v == 2) {
+ __u8 struct_v;
+ decode(struct_v, p); // yes, really: extra byte for v2 encoding only, see 6ee52e7d.
+ }
+ decode(seq, p);
+ decode(created, p);
+ decode(last_created, p);
+ decode(last_destroyed, p);
+ decode(current_parent_since, p);
+ decode(snaps, p);
+ decode(past_parents, p);
+ if (struct_v >= 5)
+ decode(past_parent_snaps, p);
+ if (struct_v >= 6)
+ decode(flags, p);
+ else
+ flags = 0;
+ DECODE_FINISH(p);
+}
+
+void sr_t::dump(Formatter *f) const
+{
+ f->dump_unsigned("seq", seq);
+ f->dump_unsigned("created", created);
+ f->dump_unsigned("last_created", last_created);
+ f->dump_unsigned("last_destroyed", last_destroyed);
+ f->dump_unsigned("current_parent_since", current_parent_since);
+
+ f->open_array_section("snaps");
+ for (map<snapid_t,SnapInfo>::const_iterator p = snaps.begin(); p != snaps.end(); ++p) {
+ f->open_object_section("snapinfo");
+ f->dump_unsigned("last", p->first);
+ p->second.dump(f);
+ f->close_section();
+ }
+ f->close_section();
+
+ f->open_array_section("past_parents");
+ for (map<snapid_t,snaplink_t>::const_iterator p = past_parents.begin(); p != past_parents.end(); ++p) {
+ f->open_object_section("past_parent");
+ f->dump_unsigned("last", p->first);
+ p->second.dump(f);
+ f->close_section();
+ }
+ f->close_section();
+
+ f->open_array_section("past_parent_snaps");
+ for (auto p = past_parent_snaps.begin(); p != past_parent_snaps.end(); ++p) {
+ f->open_object_section("snapinfo");
+ f->dump_unsigned("snapid", *p);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+void sr_t::generate_test_instances(std::list<sr_t*>& ls)
+{
+ ls.push_back(new sr_t);
+ ls.push_back(new sr_t);
+ ls.back()->seq = 1;
+ ls.back()->created = 2;
+ ls.back()->last_created = 3;
+ ls.back()->last_destroyed = 4;
+ ls.back()->current_parent_since = 5;
+ ls.back()->snaps[123].snapid = 7;
+ ls.back()->snaps[123].ino = 8;
+ ls.back()->snaps[123].stamp = utime_t(9, 10);
+ ls.back()->snaps[123].name = "name1";
+ ls.back()->past_parents[12].ino = 12;
+ ls.back()->past_parents[12].first = 3;
+
+ ls.back()->past_parent_snaps.insert(5);
+ ls.back()->past_parent_snaps.insert(6);
+}
+