ceph/src/librbd/mirroring_watcher/Types.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "common/Formatter.h"
   5 #include "include/assert.h"
   6 #include "include/stringify.h"
   7 #include "librbd/mirroring_watcher/Types.h"
   8 #include "librbd/watcher/Utils.h"
   9
  10 namespace librbd {
  11 namespace mirroring_watcher {
  12
  13 namespace {
  14
  15 class DumpPayloadVisitor : public boost::static_visitor<void> {
  16 public:
  17   explicit DumpPayloadVisitor(Formatter *formatter) : m_formatter(formatter) {}
  18
  19   template <typename Payload>
  20   inline void operator()(const Payload &payload) const {
  21     NotifyOp notify_op = Payload::NOTIFY_OP;
  22     m_formatter->dump_string("notify_op", stringify(notify_op));
  23     payload.dump(m_formatter);
  24   }
  25
  26 private:
  27   ceph::Formatter *m_formatter;
  28 };
  29
  30 } // anonymous namespace
  31
  32 void ModeUpdatedPayload::encode(bufferlist &bl) const {
  33   ::encode(static_cast<uint32_t>(mirror_mode), bl);
  34 }
  35
  36 void ModeUpdatedPayload::decode(__u8 version, bufferlist::iterator &iter) {
  37   uint32_t mirror_mode_decode;
  38   ::decode(mirror_mode_decode, iter);
  39   mirror_mode = static_cast<cls::rbd::MirrorMode>(mirror_mode_decode);
  40 }
  41
  42 void ModeUpdatedPayload::dump(Formatter *f) const {
  43   f->dump_stream("mirror_mode") << mirror_mode;
  44 }
  45
  46 void ImageUpdatedPayload::encode(bufferlist &bl) const {
  47   ::encode(static_cast<uint32_t>(mirror_image_state), bl);
  48   ::encode(image_id, bl);
  49   ::encode(global_image_id, bl);
  50 }
  51
  52 void ImageUpdatedPayload::decode(__u8 version, bufferlist::iterator &iter) {
  53   uint32_t mirror_image_state_decode;
  54   ::decode(mirror_image_state_decode, iter);
  55   mirror_image_state = static_cast<cls::rbd::MirrorImageState>(
  56     mirror_image_state_decode);
  57   ::decode(image_id, iter);
  58   ::decode(global_image_id, iter);
  59 }
  60
  61 void ImageUpdatedPayload::dump(Formatter *f) const {
  62   f->dump_stream("mirror_image_state") << mirror_image_state;
  63   f->dump_string("image_id", image_id);
  64   f->dump_string("global_image_id", global_image_id);
  65 }
  66
  67 void UnknownPayload::encode(bufferlist &bl) const {
  68   assert(false);
  69 }
  70
  71 void UnknownPayload::decode(__u8 version, bufferlist::iterator &iter) {
  72 }
  73
  74 void UnknownPayload::dump(Formatter *f) const {
  75 }
  76
  77 void NotifyMessage::encode(bufferlist& bl) const {
  78   ENCODE_START(1, 1, bl);
  79   boost::apply_visitor(watcher::util::EncodePayloadVisitor(bl), payload);
  80   ENCODE_FINISH(bl);
  81 }
  82
  83 void NotifyMessage::decode(bufferlist::iterator& iter) {
  84   DECODE_START(1, iter);
  85
  86   uint32_t notify_op;
  87   ::decode(notify_op, iter);
  88
  89   // select the correct payload variant based upon the encoded op
  90   switch (notify_op) {
  91   case NOTIFY_OP_MODE_UPDATED:
  92     payload = ModeUpdatedPayload();
  93     break;
  94   case NOTIFY_OP_IMAGE_UPDATED:
  95     payload = ImageUpdatedPayload();
  96     break;
  97   default:
  98     payload = UnknownPayload();
  99     break;
 100   }
 101
 102   apply_visitor(watcher::util::DecodePayloadVisitor(struct_v, iter), payload);
 103   DECODE_FINISH(iter);
 104 }
 105
 106 void NotifyMessage::dump(Formatter *f) const {
 107   apply_visitor(DumpPayloadVisitor(f), payload);
 108 }
 109
 110 void NotifyMessage::generate_test_instances(std::list<NotifyMessage *> &o) {
 111   o.push_back(new NotifyMessage(ModeUpdatedPayload(cls::rbd::MIRROR_MODE_DISABLED)));
 112   o.push_back(new NotifyMessage(ImageUpdatedPayload(cls::rbd::MIRROR_IMAGE_STATE_DISABLING,
 113                                                     "image id", "global image id")));
 114 }
 115
 116 std::ostream &operator<<(std::ostream &out, const NotifyOp &op) {
 117   switch (op) {
 118   case NOTIFY_OP_MODE_UPDATED:
 119     out << "ModeUpdated";
 120     break;
 121   case NOTIFY_OP_IMAGE_UPDATED:
 122     out << "ImageUpdated";
 123     break;
 124   default:
 125     out << "Unknown (" << static_cast<uint32_t>(op) << ")";
 126     break;
 127   }
 128   return out;
 129 }
 130
 131 } // namespace mirroring_watcher
 132 } // namespace librbd