Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 228 insertions, 0 deletions

diff --git a/src/mds/snap.cc b/src/mds/snap.cc
new file mode 100644
index 000000000..f988ca513
--- /dev/null
+++ b/src/mds/snap.cc
@@ -0,0 +1,228 @@
+// -*- 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);
+}
+