ceph/src/mds/snap.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004- Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #include "snap.h"
  16
  17 #include "common/Formatter.h"
  18
  19 /*
  20  * SnapInfo
  21  */
  22
  23 void SnapInfo::encode(bufferlist& bl) const
  24 {
  25   ENCODE_START(2, 2, bl);
  26   ::encode(snapid, bl);
  27   ::encode(ino, bl);
  28   ::encode(stamp, bl);
  29   ::encode(name, bl);
  30   ENCODE_FINISH(bl);
  31 }
  32
  33 void SnapInfo::decode(bufferlist::iterator& bl)
  34 {
  35   DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
  36   ::decode(snapid, bl);
  37   ::decode(ino, bl);
  38   ::decode(stamp, bl);
  39   ::decode(name, bl);
  40   DECODE_FINISH(bl);
  41 }
  42
  43 void SnapInfo::dump(Formatter *f) const
  44 {
  45   f->dump_unsigned("snapid", snapid);
  46   f->dump_unsigned("ino", ino);
  47   f->dump_stream("stamp") << stamp;
  48   f->dump_string("name", name);
  49 }
  50
  51 void SnapInfo::generate_test_instances(list<SnapInfo*>& ls)
  52 {
  53   ls.push_back(new SnapInfo);
  54   ls.push_back(new SnapInfo);
  55   ls.back()->snapid = 1;
  56   ls.back()->ino = 2;
  57   ls.back()->stamp = utime_t(3, 4);
  58   ls.back()->name = "foo";
  59 }
  60
  61 ostream& operator<<(ostream& out, const SnapInfo &sn)
  62 {
  63   return out << "snap(" << sn.snapid
  64              << " " << sn.ino
  65              << " '" << sn.name
  66              << "' " << sn.stamp << ")";
  67 }
  68
  69 const string& SnapInfo::get_long_name()
  70 {
  71   if (long_name.length() == 0) {
  72     char nm[80];
  73     snprintf(nm, sizeof(nm), "_%s_%llu", name.c_str(), (unsigned long long)ino);
  74     long_name = nm;
  75   }
  76   return long_name;
  77 }
  78
  79 /*
  80  * snaplink_t
  81  */
  82
  83 void snaplink_t::encode(bufferlist& bl) const
  84 {
  85   ENCODE_START(2, 2, bl);
  86   ::encode(ino, bl);
  87   ::encode(first, bl);
  88   ENCODE_FINISH(bl);
  89 }
  90
  91 void snaplink_t::decode(bufferlist::iterator& bl)
  92 {
  93   DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
  94   ::decode(ino, bl);
  95   ::decode(first, bl);
  96   DECODE_FINISH(bl);
  97 }
  98
  99 void snaplink_t::dump(Formatter *f) const
 100 {
 101   f->dump_unsigned("ino", ino);
 102   f->dump_unsigned("first", first);
 103 }
 104
 105 void snaplink_t::generate_test_instances(list<snaplink_t*>& ls)
 106 {
 107   ls.push_back(new snaplink_t);
 108   ls.push_back(new snaplink_t);
 109   ls.back()->ino = 2;
 110   ls.back()->first = 123;
 111 }
 112
 113 ostream& operator<<(ostream& out, const snaplink_t &l)
 114 {
 115   return out << l.ino << "@" << l.first;
 116 }
 117
 118 /*
 119  * sr_t
 120  */
 121
 122 void sr_t::encode(bufferlist& bl) const
 123 {
 124   ENCODE_START(4, 4, bl);
 125   ::encode(seq, bl);
 126   ::encode(created, bl);
 127   ::encode(last_created, bl);
 128   ::encode(last_destroyed, bl);
 129   ::encode(current_parent_since, bl);
 130   ::encode(snaps, bl);
 131   ::encode(past_parents, bl);
 132   ENCODE_FINISH(bl);
 133 }
 134
 135 void sr_t::decode(bufferlist::iterator& p)
 136 {
 137   DECODE_START_LEGACY_COMPAT_LEN(4, 4, 4, p);
 138   if (struct_v == 2) {
 139     __u8 struct_v;
 140     ::decode(struct_v, p);  // yes, really: extra byte for v2 encoding only, see 6ee52e7d.
 141   }
 142   ::decode(seq, p);
 143   ::decode(created, p);
 144   ::decode(last_created, p);
 145   ::decode(last_destroyed, p);
 146   ::decode(current_parent_since, p);
 147   ::decode(snaps, p);
 148   ::decode(past_parents, p);
 149   DECODE_FINISH(p);
 150 }
 151
 152 void sr_t::dump(Formatter *f) const
 153 {
 154   f->dump_unsigned("seq", seq);
 155   f->dump_unsigned("created", created);
 156   f->dump_unsigned("last_created", last_created);
 157   f->dump_unsigned("last_destroyed", last_destroyed);
 158   f->dump_unsigned("current_parent_since", current_parent_since);
 159
 160   f->open_array_section("snaps");
 161   for (map<snapid_t,SnapInfo>::const_iterator p = snaps.begin(); p != snaps.end(); ++p) {
 162     f->open_object_section("snapinfo");
 163     f->dump_unsigned("last", p->first);
 164     p->second.dump(f);
 165     f->close_section();
 166   }
 167   f->close_section();
 168
 169   f->open_array_section("past_parents");
 170   for (map<snapid_t,snaplink_t>::const_iterator p = past_parents.begin(); p != past_parents.end(); ++p) {
 171     f->open_object_section("past_parent");
 172     f->dump_unsigned("last", p->first);
 173     p->second.dump(f);
 174     f->close_section();
 175   }
 176   f->close_section();
 177 }
 178
 179 void sr_t::generate_test_instances(list<sr_t*>& ls)
 180 {
 181   ls.push_back(new sr_t);
 182   ls.push_back(new sr_t);
 183   ls.back()->seq = 1;
 184   ls.back()->created = 2;
 185   ls.back()->last_created = 3;
 186   ls.back()->last_destroyed = 4;
 187   ls.back()->current_parent_since = 5;
 188   ls.back()->snaps[123].snapid = 7;
 189   ls.back()->snaps[123].ino = 8;
 190   ls.back()->snaps[123].stamp = utime_t(9, 10);
 191   ls.back()->snaps[123].name = "name1";
 192   ls.back()->past_parents[12].ino = 12;
 193   ls.back()->past_parents[12].first = 3;
 194 }
 195