diff options
Diffstat (limited to 'src/mds/snap.cc')
| -rw-r--r-- | src/mds/snap.cc | 228 |
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); +} + |