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, 1359 insertions, 0 deletions

diff --git a/src/cls/rbd/cls_rbd_types.cc b/src/cls/rbd/cls_rbd_types.cc
new file mode 100644
index 000000000..e47f22777
--- /dev/null
+++ b/src/cls/rbd/cls_rbd_types.cc
@@ -0,0 +1,1359 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <boost/variant.hpp>
+#include "cls/rbd/cls_rbd_types.h"
+#include "common/Formatter.h"
+
+namespace cls {
+namespace rbd {
+
+using std::istringstream;
+using std::ostringstream;
+using std::string;
+
+using ceph::bufferlist;
+using ceph::Formatter;
+
+std::ostream& operator<<(std::ostream& os,
+                         MirrorPeerDirection mirror_peer_direction) {
+  switch (mirror_peer_direction) {
+  case MIRROR_PEER_DIRECTION_RX:
+    os << "RX";
+    break;
+  case MIRROR_PEER_DIRECTION_TX:
+    os << "TX";
+    break;
+  case MIRROR_PEER_DIRECTION_RX_TX:
+    os << "RX/TX";
+    break;
+  default:
+    os << "unknown";
+    break;
+  }
+  return os;
+}
+
+void MirrorPeer::encode(bufferlist &bl) const {
+  ENCODE_START(2, 1, bl);
+  encode(uuid, bl);
+  encode(site_name, bl);
+  encode(client_name, bl);
+  int64_t pool_id = -1;
+  encode(pool_id, bl);
+
+  // v2
+  encode(static_cast<uint8_t>(mirror_peer_direction), bl);
+  encode(mirror_uuid, bl);
+  encode(last_seen, bl);
+  ENCODE_FINISH(bl);
+}
+
+void MirrorPeer::decode(bufferlist::const_iterator &it) {
+  DECODE_START(2, it);
+  decode(uuid, it);
+  decode(site_name, it);
+  decode(client_name, it);
+  int64_t pool_id;
+  decode(pool_id, it);
+
+  if (struct_v >= 2) {
+    uint8_t mpd;
+    decode(mpd, it);
+    mirror_peer_direction = static_cast<MirrorPeerDirection>(mpd);
+    decode(mirror_uuid, it);
+    decode(last_seen, it);
+  }
+
+  DECODE_FINISH(it);
+}
+
+void MirrorPeer::dump(Formatter *f) const {
+  f->dump_string("uuid", uuid);
+  f->dump_stream("direction") << mirror_peer_direction;
+  f->dump_string("site_name", site_name);
+  f->dump_string("mirror_uuid", mirror_uuid);
+  f->dump_string("client_name", client_name);
+  f->dump_stream("last_seen") << last_seen;
+}
+
+void MirrorPeer::generate_test_instances(std::list<MirrorPeer*> &o) {
+  o.push_back(new MirrorPeer());
+  o.push_back(new MirrorPeer("uuid-123", MIRROR_PEER_DIRECTION_RX, "site A",
+                             "client name", ""));
+  o.push_back(new MirrorPeer("uuid-234", MIRROR_PEER_DIRECTION_TX, "site B",
+                             "", "mirror_uuid"));
+  o.push_back(new MirrorPeer("uuid-345", MIRROR_PEER_DIRECTION_RX_TX, "site C",
+                             "client name", "mirror_uuid"));
+}
+
+bool MirrorPeer::operator==(const MirrorPeer &rhs) const {
+  return (uuid == rhs.uuid &&
+          mirror_peer_direction == rhs.mirror_peer_direction &&
+          site_name == rhs.site_name &&
+          client_name == rhs.client_name &&
+          mirror_uuid == rhs.mirror_uuid &&
+          last_seen == rhs.last_seen);
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorMode& mirror_mode) {
+  switch (mirror_mode) {
+  case MIRROR_MODE_DISABLED:
+    os << "disabled";
+    break;
+  case MIRROR_MODE_IMAGE:
+    os << "image";
+    break;
+  case MIRROR_MODE_POOL:
+    os << "pool";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(mirror_mode) << ")";
+    break;
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorPeer& peer) {
+  os << "["
+     << "uuid=" << peer.uuid << ", "
+     << "direction=" << peer.mirror_peer_direction << ", "
+     << "site_name=" << peer.site_name << ", "
+     << "client_name=" << peer.client_name << ", "
+     << "mirror_uuid=" << peer.mirror_uuid << ", "
+     << "last_seen=" << peer.last_seen
+     << "]";
+  return os;
+}
+
+void MirrorImage::encode(bufferlist &bl) const {
+  ENCODE_START(2, 1, bl);
+  encode(global_image_id, bl);
+  encode(static_cast<uint8_t>(state), bl);
+  encode(static_cast<uint8_t>(mode), bl);
+  ENCODE_FINISH(bl);
+}
+
+void MirrorImage::decode(bufferlist::const_iterator &it) {
+  uint8_t int_state;
+  DECODE_START(2, it);
+  decode(global_image_id, it);
+  decode(int_state, it);
+  state = static_cast<MirrorImageState>(int_state);
+  if (struct_v >= 2) {
+    uint8_t int_mode;
+    decode(int_mode, it);
+    mode = static_cast<MirrorImageMode>(int_mode);
+  }
+  DECODE_FINISH(it);
+}
+
+void MirrorImage::dump(Formatter *f) const {
+  f->dump_stream("mode") << mode;
+  f->dump_string("global_image_id", global_image_id);
+  f->dump_stream("state") << state;
+}
+
+void MirrorImage::generate_test_instances(std::list<MirrorImage*> &o) {
+  o.push_back(new MirrorImage());
+  o.push_back(new MirrorImage(MIRROR_IMAGE_MODE_JOURNAL, "uuid-123",
+                              MIRROR_IMAGE_STATE_ENABLED));
+  o.push_back(new MirrorImage(MIRROR_IMAGE_MODE_SNAPSHOT, "uuid-abc",
+                              MIRROR_IMAGE_STATE_DISABLING));
+}
+
+bool MirrorImage::operator==(const MirrorImage &rhs) const {
+  return mode == rhs.mode && global_image_id == rhs.global_image_id &&
+         state == rhs.state;
+}
+
+bool MirrorImage::operator<(const MirrorImage &rhs) const {
+  if (mode != rhs.mode) {
+    return mode < rhs.mode;
+  }
+  if (global_image_id != rhs.global_image_id) {
+    return global_image_id < rhs.global_image_id;
+  }
+  return state < rhs.state;
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorImageMode& mirror_mode) {
+  switch (mirror_mode) {
+  case MIRROR_IMAGE_MODE_JOURNAL:
+    os << "journal";
+    break;
+  case MIRROR_IMAGE_MODE_SNAPSHOT:
+    os << "snapshot";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(mirror_mode) << ")";
+    break;
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorImageState& mirror_state) {
+  switch (mirror_state) {
+  case MIRROR_IMAGE_STATE_DISABLING:
+    os << "disabling";
+    break;
+  case MIRROR_IMAGE_STATE_ENABLED:
+    os << "enabled";
+    break;
+  case MIRROR_IMAGE_STATE_DISABLED:
+    os << "disabled";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(mirror_state) << ")";
+    break;
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorImage& mirror_image) {
+  os << "["
+     << "mode=" << mirror_image.mode << ", "
+     << "global_image_id=" << mirror_image.global_image_id << ", "
+     << "state=" << mirror_image.state << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MirrorImageStatusState& state) {
+  switch (state) {
+  case MIRROR_IMAGE_STATUS_STATE_UNKNOWN:
+    os << "unknown";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_ERROR:
+    os << "error";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_SYNCING:
+    os << "syncing";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_STARTING_REPLAY:
+    os << "starting_replay";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_REPLAYING:
+    os << "replaying";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_STOPPING_REPLAY:
+    os << "stopping_replay";
+    break;
+  case MIRROR_IMAGE_STATUS_STATE_STOPPED:
+    os << "stopped";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(state) << ")";
+    break;
+  }
+  return os;
+}
+
+const std::string MirrorImageSiteStatus::LOCAL_MIRROR_UUID(""); // empty mirror uuid
+
+void MirrorImageSiteStatus::encode_meta(uint8_t version, bufferlist &bl) const {
+  if (version >= 2) {
+    ceph::encode(mirror_uuid, bl);
+  }
+  cls::rbd::encode(state, bl);
+  ceph::encode(description, bl);
+  ceph::encode(last_update, bl);
+  ceph::encode(up, bl);
+}
+
+void MirrorImageSiteStatus::decode_meta(uint8_t version,
+                                        bufferlist::const_iterator &it) {
+  if (version < 2) {
+    mirror_uuid = LOCAL_MIRROR_UUID;
+  } else {
+    ceph::decode(mirror_uuid, it);
+  }
+
+  cls::rbd::decode(state, it);
+  ceph::decode(description, it);
+  ::decode(last_update, it);
+  ceph::decode(up, it);
+}
+
+void MirrorImageSiteStatus::encode(bufferlist &bl) const {
+  // break compatibility when site-name is provided
+  uint8_t version = (mirror_uuid == LOCAL_MIRROR_UUID ? 1 : 2);
+  ENCODE_START(version, version, bl);
+  encode_meta(version, bl);
+  ENCODE_FINISH(bl);
+}
+
+void MirrorImageSiteStatus::decode(bufferlist::const_iterator &it) {
+  DECODE_START(2, it);
+  decode_meta(struct_v, it);
+  DECODE_FINISH(it);
+}
+
+void MirrorImageSiteStatus::dump(Formatter *f) const {
+  f->dump_string("state", state_to_string());
+  f->dump_string("description", description);
+  f->dump_stream("last_update") << last_update;
+}
+
+std::string MirrorImageSiteStatus::state_to_string() const {
+  std::stringstream ss;
+  ss << (up ? "up+" : "down+") << state;
+  return ss.str();
+}
+
+void MirrorImageSiteStatus::generate_test_instances(
+  std::list<MirrorImageSiteStatus*> &o) {
+  o.push_back(new MirrorImageSiteStatus());
+  o.push_back(new MirrorImageSiteStatus("", MIRROR_IMAGE_STATUS_STATE_REPLAYING,
+                                        ""));
+  o.push_back(new MirrorImageSiteStatus("", MIRROR_IMAGE_STATUS_STATE_ERROR,
+                                        "error"));
+  o.push_back(new MirrorImageSiteStatus("2fb68ca9-1ba0-43b3-8cdf-8c5a9db71e65",
+                                        MIRROR_IMAGE_STATUS_STATE_STOPPED, ""));
+}
+
+bool MirrorImageSiteStatus::operator==(const MirrorImageSiteStatus &rhs) const {
+  return state == rhs.state && description == rhs.description && up == rhs.up;
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MirrorImageSiteStatus& status) {
+  os << "{"
+     << "state=" << status.state_to_string() << ", "
+     << "description=" << status.description << ", "
+     << "last_update=" << status.last_update << "]}";
+  return os;
+}
+
+void MirrorImageSiteStatusOnDisk::encode_meta(bufferlist &bl,
+                                              uint64_t features) const {
+  ENCODE_START(1, 1, bl);
+  auto sanitized_origin = origin;
+  sanitize_entity_inst(&sanitized_origin);
+  encode(sanitized_origin, bl, features);
+  ENCODE_FINISH(bl);
+}
+
+void MirrorImageSiteStatusOnDisk::encode(bufferlist &bl,
+                                         uint64_t features) const {
+  encode_meta(bl, features);
+  cls::rbd::MirrorImageSiteStatus::encode(bl);
+}
+
+void MirrorImageSiteStatusOnDisk::decode_meta(bufferlist::const_iterator &it) {
+  DECODE_START(1, it);
+  decode(origin, it);
+  sanitize_entity_inst(&origin);
+  DECODE_FINISH(it);
+}
+
+void MirrorImageSiteStatusOnDisk::decode(bufferlist::const_iterator &it) {
+  decode_meta(it);
+  cls::rbd::MirrorImageSiteStatus::decode(it);
+}
+
+void MirrorImageSiteStatusOnDisk::generate_test_instances(
+    std::list<MirrorImageSiteStatusOnDisk*> &o) {
+  o.push_back(new MirrorImageSiteStatusOnDisk());
+  o.push_back(new MirrorImageSiteStatusOnDisk(
+    {"", MIRROR_IMAGE_STATUS_STATE_ERROR, "error"}));
+  o.push_back(new MirrorImageSiteStatusOnDisk(
+    {"siteA", MIRROR_IMAGE_STATUS_STATE_STOPPED, ""}));
+}
+
+int MirrorImageStatus::get_local_mirror_image_site_status(
+    MirrorImageSiteStatus* status) const {
+  auto it = std::find_if(
+    mirror_image_site_statuses.begin(),
+    mirror_image_site_statuses.end(),
+    [](const MirrorImageSiteStatus& status) {
+      return status.mirror_uuid == MirrorImageSiteStatus::LOCAL_MIRROR_UUID;
+    });
+  if (it == mirror_image_site_statuses.end()) {
+    return -ENOENT;
+  }
+
+  *status = *it;
+  return 0;
+}
+
+void MirrorImageStatus::encode(bufferlist &bl) const {
+  // don't break compatibility for extra site statuses
+  ENCODE_START(2, 1, bl);
+
+  // local site status
+  MirrorImageSiteStatus local_status;
+  int r = get_local_mirror_image_site_status(&local_status);
+  local_status.encode_meta(1, bl);
+
+  bool local_status_valid = (r >= 0);
+  encode(local_status_valid, bl);
+
+  // remote site statuses
+  __u32 n = mirror_image_site_statuses.size();
+  if (local_status_valid) {
+    --n;
+  }
+  encode(n, bl);
+
+  for (auto& status : mirror_image_site_statuses) {
+    if (status.mirror_uuid == MirrorImageSiteStatus::LOCAL_MIRROR_UUID) {
+      continue;
+    }
+    status.encode_meta(2, bl);
+  }
+  ENCODE_FINISH(bl);
+}
+
+void MirrorImageStatus::decode(bufferlist::const_iterator &it) {
+  DECODE_START(2, it);
+
+  // local site status
+  MirrorImageSiteStatus local_status;
+  local_status.decode_meta(1, it);
+
+  if (struct_v < 2) {
+    mirror_image_site_statuses.push_back(local_status);
+  } else {
+    bool local_status_valid;
+    decode(local_status_valid, it);
+
+    __u32 n;
+    decode(n, it);
+    if (local_status_valid) {
+      ++n;
+    }
+
+    mirror_image_site_statuses.resize(n);
+    for (auto status_it = mirror_image_site_statuses.begin();
+         status_it != mirror_image_site_statuses.end(); ++status_it) {
+      if (local_status_valid &&
+          status_it == mirror_image_site_statuses.begin()) {
+        *status_it = local_status;
+        continue;
+      }
+
+      // remote site status
+      status_it->decode_meta(struct_v, it);
+    }
+  }
+  DECODE_FINISH(it);
+}
+
+void MirrorImageStatus::dump(Formatter *f) const {
+  MirrorImageSiteStatus local_status;
+  int r = get_local_mirror_image_site_status(&local_status);
+  if (r >= 0) {
+    local_status.dump(f);
+  }
+
+  f->open_array_section("remotes");
+  for (auto& status : mirror_image_site_statuses) {
+    if (status.mirror_uuid == MirrorImageSiteStatus::LOCAL_MIRROR_UUID) {
+      continue;
+    }
+
+    f->open_object_section("remote");
+    status.dump(f);
+    f->close_section();
+  }
+  f->close_section();
+}
+
+bool MirrorImageStatus::operator==(const MirrorImageStatus &rhs) const {
+  return (mirror_image_site_statuses == rhs.mirror_image_site_statuses);
+}
+
+void MirrorImageStatus::generate_test_instances(
+    std::list<MirrorImageStatus*> &o) {
+  o.push_back(new MirrorImageStatus());
+  o.push_back(new MirrorImageStatus({{"", MIRROR_IMAGE_STATUS_STATE_ERROR, ""}}));
+  o.push_back(new MirrorImageStatus({{"", MIRROR_IMAGE_STATUS_STATE_STOPPED, ""},
+                                     {"siteA", MIRROR_IMAGE_STATUS_STATE_REPLAYING, ""}}));
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MirrorImageStatus& status) {
+  os << "{";
+  MirrorImageSiteStatus local_status;
+  int r = status.get_local_mirror_image_site_status(&local_status);
+  if (r >= 0) {
+    os << "state=" << local_status.state_to_string() << ", "
+       << "description=" << local_status.description << ", "
+       << "last_update=" << local_status.last_update << ", ";
+  }
+
+  os << "remotes=[";
+  for (auto& remote_status : status.mirror_image_site_statuses) {
+    if (remote_status.mirror_uuid == MirrorImageSiteStatus::LOCAL_MIRROR_UUID) {
+      continue;
+    }
+
+    os << "{"
+       << "mirror_uuid=" << remote_status.mirror_uuid<< ", "
+       << "state=" << remote_status.state_to_string() << ", "
+       << "description=" << remote_status.description << ", "
+       << "last_update=" << remote_status.last_update
+       << "}";
+  }
+  os << "]}";
+  return os;
+}
+
+void ParentImageSpec::encode(bufferlist& bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(pool_id, bl);
+  encode(pool_namespace, bl);
+  encode(image_id, bl);
+  encode(snap_id, bl);
+  ENCODE_FINISH(bl);
+}
+
+void ParentImageSpec::decode(bufferlist::const_iterator& bl) {
+  DECODE_START(1, bl);
+  decode(pool_id, bl);
+  decode(pool_namespace, bl);
+  decode(image_id, bl);
+  decode(snap_id, bl);
+  DECODE_FINISH(bl);
+}
+
+void ParentImageSpec::dump(Formatter *f) const {
+  f->dump_int("pool_id", pool_id);
+  f->dump_string("pool_namespace", pool_namespace);
+  f->dump_string("image_id", image_id);
+  f->dump_unsigned("snap_id", snap_id);
+}
+
+void ParentImageSpec::generate_test_instances(std::list<ParentImageSpec*>& o) {
+  o.push_back(new ParentImageSpec{});
+  o.push_back(new ParentImageSpec{1, "", "foo", 3});
+  o.push_back(new ParentImageSpec{1, "ns", "foo", 3});
+}
+
+std::ostream& operator<<(std::ostream& os, const ParentImageSpec& rhs) {
+  os << "["
+     << "pool_id=" << rhs.pool_id << ", "
+     << "pool_namespace=" << rhs.pool_namespace << ", "
+     << "image_id=" << rhs.image_id << ", "
+     << "snap_id=" << rhs.snap_id
+     << "]";
+  return os;
+}
+
+void ChildImageSpec::encode(bufferlist &bl) const {
+  ENCODE_START(2, 1, bl);
+  encode(pool_id, bl);
+  encode(image_id, bl);
+  encode(pool_namespace, bl);
+  ENCODE_FINISH(bl);
+}
+
+void ChildImageSpec::decode(bufferlist::const_iterator &it) {
+  DECODE_START(2, it);
+  decode(pool_id, it);
+  decode(image_id, it);
+  if (struct_v >= 2) {
+    decode(pool_namespace, it);
+  }
+  DECODE_FINISH(it);
+}
+
+void ChildImageSpec::dump(Formatter *f) const {
+  f->dump_int("pool_id", pool_id);
+  f->dump_string("pool_namespace", pool_namespace);
+  f->dump_string("image_id", image_id);
+}
+
+void ChildImageSpec::generate_test_instances(std::list<ChildImageSpec*> &o) {
+  o.push_back(new ChildImageSpec());
+  o.push_back(new ChildImageSpec(123, "", "abc"));
+  o.push_back(new ChildImageSpec(123, "ns", "abc"));
+}
+
+std::ostream& operator<<(std::ostream& os, const ChildImageSpec& rhs) {
+  os << "["
+     << "pool_id=" << rhs.pool_id << ", "
+     << "pool_namespace=" << rhs.pool_namespace << ", "
+     << "image_id=" << rhs.image_id
+     << "]";
+  return os;
+}
+
+void GroupImageSpec::encode(bufferlist &bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(image_id, bl);
+  encode(pool_id, bl);
+  ENCODE_FINISH(bl);
+}
+
+void GroupImageSpec::decode(bufferlist::const_iterator &it) {
+  DECODE_START(1, it);
+  decode(image_id, it);
+  decode(pool_id, it);
+  DECODE_FINISH(it);
+}
+
+void GroupImageSpec::dump(Formatter *f) const {
+  f->dump_string("image_id", image_id);
+  f->dump_int("pool_id", pool_id);
+}
+
+int GroupImageSpec::from_key(const std::string &image_key,
+				    GroupImageSpec *spec) {
+  if (nullptr == spec) return -EINVAL;
+  int prefix_len = cls::rbd::RBD_GROUP_IMAGE_KEY_PREFIX.size();
+  std::string data_string = image_key.substr(prefix_len,
+					     image_key.size() - prefix_len);
+  size_t p = data_string.find("_");
+  if (std::string::npos == p) {
+    return -EIO;
+  }
+  data_string[p] = ' ';
+
+  istringstream iss(data_string);
+  uint64_t pool_id;
+  string image_id;
+  iss >> std::hex >> pool_id >> image_id;
+
+  spec->image_id = image_id;
+  spec->pool_id = pool_id;
+  return 0;
+}
+
+std::string GroupImageSpec::image_key() {
+  if (-1 == pool_id)
+    return "";
+  else {
+    ostringstream oss;
+    oss << RBD_GROUP_IMAGE_KEY_PREFIX << std::setw(16)
+	<< std::setfill('0') << std::hex << pool_id << "_" << image_id;
+    return oss.str();
+  }
+}
+
+void GroupImageSpec::generate_test_instances(std::list<GroupImageSpec*> &o) {
+  o.push_back(new GroupImageSpec("10152ae8944a", 0));
+  o.push_back(new GroupImageSpec("1018643c9869", 3));
+}
+
+void GroupImageStatus::encode(bufferlist &bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(spec, bl);
+  encode(state, bl);
+  ENCODE_FINISH(bl);
+}
+
+void GroupImageStatus::decode(bufferlist::const_iterator &it) {
+  DECODE_START(1, it);
+  decode(spec, it);
+  decode(state, it);
+  DECODE_FINISH(it);
+}
+
+std::string GroupImageStatus::state_to_string() const {
+  std::stringstream ss;
+  if (state == GROUP_IMAGE_LINK_STATE_INCOMPLETE) {
+    ss << "incomplete";
+  }
+  if (state == GROUP_IMAGE_LINK_STATE_ATTACHED) {
+    ss << "attached";
+  }
+  return ss.str();
+}
+
+void GroupImageStatus::dump(Formatter *f) const {
+  spec.dump(f);
+  f->dump_string("state", state_to_string());
+}
+
+void GroupImageStatus::generate_test_instances(std::list<GroupImageStatus*> &o) {
+  o.push_back(new GroupImageStatus(GroupImageSpec("10152ae8944a", 0), GROUP_IMAGE_LINK_STATE_ATTACHED));
+  o.push_back(new GroupImageStatus(GroupImageSpec("1018643c9869", 3), GROUP_IMAGE_LINK_STATE_ATTACHED));
+  o.push_back(new GroupImageStatus(GroupImageSpec("10152ae8944a", 0), GROUP_IMAGE_LINK_STATE_INCOMPLETE));
+  o.push_back(new GroupImageStatus(GroupImageSpec("1018643c9869", 3), GROUP_IMAGE_LINK_STATE_INCOMPLETE));
+}
+
+
+void GroupSpec::encode(bufferlist &bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(pool_id, bl);
+  encode(group_id, bl);
+  ENCODE_FINISH(bl);
+}
+
+void GroupSpec::decode(bufferlist::const_iterator &it) {
+  DECODE_START(1, it);
+  decode(pool_id, it);
+  decode(group_id, it);
+  DECODE_FINISH(it);
+}
+
+void GroupSpec::dump(Formatter *f) const {
+  f->dump_string("group_id", group_id);
+  f->dump_int("pool_id", pool_id);
+}
+
+bool GroupSpec::is_valid() const {
+  return (!group_id.empty()) && (pool_id != -1);
+}
+
+void GroupSpec::generate_test_instances(std::list<GroupSpec *> &o) {
+  o.push_back(new GroupSpec("10152ae8944a", 0));
+  o.push_back(new GroupSpec("1018643c9869", 3));
+}
+
+void GroupSnapshotNamespace::encode(bufferlist& bl) const {
+  using ceph::encode;
+  encode(group_pool, bl);
+  encode(group_id, bl);
+  encode(group_snapshot_id, bl);
+}
+
+void GroupSnapshotNamespace::decode(bufferlist::const_iterator& it) {
+  using ceph::decode;
+  decode(group_pool, it);
+  decode(group_id, it);
+  decode(group_snapshot_id, it);
+}
+
+void GroupSnapshotNamespace::dump(Formatter *f) const {
+  f->dump_int("group_pool", group_pool);
+  f->dump_string("group_id", group_id);
+  f->dump_string("group_snapshot_id", group_snapshot_id);
+}
+
+void TrashSnapshotNamespace::encode(bufferlist& bl) const {
+  using ceph::encode;
+  encode(original_name, bl);
+  encode(static_cast<uint32_t>(original_snapshot_namespace_type), bl);
+}
+
+void TrashSnapshotNamespace::decode(bufferlist::const_iterator& it) {
+  using ceph::decode;
+  decode(original_name, it);
+  uint32_t snap_type;
+  decode(snap_type, it);
+  original_snapshot_namespace_type = static_cast<SnapshotNamespaceType>(
+    snap_type);
+}
+
+void TrashSnapshotNamespace::dump(Formatter *f) const {
+  f->dump_string("original_name", original_name);
+  f->dump_stream("original_snapshot_namespace")
+    << original_snapshot_namespace_type;
+}
+
+void MirrorSnapshotNamespace::encode(bufferlist& bl) const {
+  using ceph::encode;
+  encode(state, bl);
+  encode(complete, bl);
+  encode(mirror_peer_uuids, bl);
+  encode(primary_mirror_uuid, bl);
+  encode(primary_snap_id, bl);
+  encode(last_copied_object_number, bl);
+  encode(snap_seqs, bl);
+}
+
+void MirrorSnapshotNamespace::decode(bufferlist::const_iterator& it) {
+  using ceph::decode;
+  decode(state, it);
+  decode(complete, it);
+  decode(mirror_peer_uuids, it);
+  decode(primary_mirror_uuid, it);
+  decode(primary_snap_id, it);
+  decode(last_copied_object_number, it);
+  decode(snap_seqs, it);
+}
+
+void MirrorSnapshotNamespace::dump(Formatter *f) const {
+  f->dump_stream("state") << state;
+  f->dump_bool("complete", complete);
+  f->open_array_section("mirror_peer_uuids");
+  for (auto &peer : mirror_peer_uuids) {
+    f->dump_string("mirror_peer_uuid", peer);
+  }
+  f->close_section();
+  if (is_primary()) {
+    f->dump_unsigned("clean_since_snap_id", clean_since_snap_id);
+  } else {
+    f->dump_string("primary_mirror_uuid", primary_mirror_uuid);
+    f->dump_unsigned("primary_snap_id", primary_snap_id);
+    f->dump_unsigned("last_copied_object_number", last_copied_object_number);
+    f->dump_stream("snap_seqs") << snap_seqs;
+  }
+}
+
+class EncodeSnapshotNamespaceVisitor : public boost::static_visitor<void> {
+public:
+  explicit EncodeSnapshotNamespaceVisitor(bufferlist &bl) : m_bl(bl) {
+  }
+
+  template <typename T>
+  inline void operator()(const T& t) const {
+    using ceph::encode;
+    encode(static_cast<uint32_t>(T::SNAPSHOT_NAMESPACE_TYPE), m_bl);
+    t.encode(m_bl);
+  }
+
+private:
+  bufferlist &m_bl;
+};
+
+class DecodeSnapshotNamespaceVisitor : public boost::static_visitor<void> {
+public:
+  DecodeSnapshotNamespaceVisitor(bufferlist::const_iterator &iter)
+    : m_iter(iter) {
+  }
+
+  template <typename T>
+  inline void operator()(T& t) const {
+    t.decode(m_iter);
+  }
+private:
+  bufferlist::const_iterator &m_iter;
+};
+
+class DumpSnapshotNamespaceVisitor : public boost::static_visitor<void> {
+public:
+  explicit DumpSnapshotNamespaceVisitor(Formatter *formatter, const std::string &key)
+    : m_formatter(formatter), m_key(key) {}
+
+  template <typename T>
+  inline void operator()(const T& t) const {
+    auto type = T::SNAPSHOT_NAMESPACE_TYPE;
+    m_formatter->dump_string(m_key.c_str(), stringify(type));
+    t.dump(m_formatter);
+  }
+private:
+  ceph::Formatter *m_formatter;
+  std::string m_key;
+};
+
+class GetTypeVisitor : public boost::static_visitor<SnapshotNamespaceType> {
+public:
+  template <typename T>
+  inline SnapshotNamespaceType operator()(const T&) const {
+    return static_cast<SnapshotNamespaceType>(T::SNAPSHOT_NAMESPACE_TYPE);
+  }
+};
+
+SnapshotNamespaceType get_snap_namespace_type(
+    const SnapshotNamespace& snapshot_namespace) {
+  return static_cast<SnapshotNamespaceType>(boost::apply_visitor(
+    GetTypeVisitor(), snapshot_namespace));
+}
+
+void SnapshotInfo::encode(bufferlist& bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(id, bl);
+  encode(snapshot_namespace, bl);
+  encode(name, bl);
+  encode(image_size, bl);
+  encode(timestamp, bl);
+  encode(child_count, bl);
+  ENCODE_FINISH(bl);
+}
+
+void SnapshotInfo::decode(bufferlist::const_iterator& it) {
+  DECODE_START(1, it);
+  decode(id, it);
+  decode(snapshot_namespace, it);
+  decode(name, it);
+  decode(image_size, it);
+  decode(timestamp, it);
+  decode(child_count, it);
+  DECODE_FINISH(it);
+}
+
+void SnapshotInfo::dump(Formatter *f) const {
+  f->dump_unsigned("id", id);
+  f->open_object_section("namespace");
+  boost::apply_visitor(DumpSnapshotNamespaceVisitor(f, "type"),
+                       snapshot_namespace);
+  f->close_section();
+  f->dump_string("name", name);
+  f->dump_unsigned("image_size", image_size);
+  f->dump_stream("timestamp") << timestamp;
+}
+
+void SnapshotInfo::generate_test_instances(std::list<SnapshotInfo*> &o) {
+  o.push_back(new SnapshotInfo(1ULL, UserSnapshotNamespace{}, "snap1", 123,
+                               {123456, 0}, 12));
+  o.push_back(new SnapshotInfo(2ULL,
+                               GroupSnapshotNamespace{567, "group1", "snap1"},
+                               "snap1", 123, {123456, 0}, 987));
+  o.push_back(new SnapshotInfo(3ULL,
+                               TrashSnapshotNamespace{
+                                 SNAPSHOT_NAMESPACE_TYPE_USER, "snap1"},
+                               "12345", 123, {123456, 0}, 429));
+  o.push_back(new SnapshotInfo(1ULL,
+                               MirrorSnapshotNamespace{MIRROR_SNAPSHOT_STATE_PRIMARY,
+                                                       {"1", "2"}, "", CEPH_NOSNAP},
+                               "snap1", 123, {123456, 0}, 12));
+  o.push_back(new SnapshotInfo(1ULL,
+                               MirrorSnapshotNamespace{MIRROR_SNAPSHOT_STATE_NON_PRIMARY,
+                                                       {"1", "2"}, "uuid", 123},
+                               "snap1", 123, {123456, 0}, 12));
+}
+
+void SnapshotNamespace::encode(bufferlist& bl) const {
+  ENCODE_START(1, 1, bl);
+  boost::apply_visitor(EncodeSnapshotNamespaceVisitor(bl), *this);
+  ENCODE_FINISH(bl);
+}
+
+void SnapshotNamespace::decode(bufferlist::const_iterator &p)
+{
+  DECODE_START(1, p);
+  uint32_t snap_type;
+  decode(snap_type, p);
+  switch (snap_type) {
+    case cls::rbd::SNAPSHOT_NAMESPACE_TYPE_USER:
+      *this = UserSnapshotNamespace();
+      break;
+    case cls::rbd::SNAPSHOT_NAMESPACE_TYPE_GROUP:
+      *this = GroupSnapshotNamespace();
+      break;
+    case cls::rbd::SNAPSHOT_NAMESPACE_TYPE_TRASH:
+      *this = TrashSnapshotNamespace();
+      break;
+    case cls::rbd::SNAPSHOT_NAMESPACE_TYPE_MIRROR:
+      *this = MirrorSnapshotNamespace();
+      break;
+    default:
+      *this = UnknownSnapshotNamespace();
+      break;
+  }
+  boost::apply_visitor(DecodeSnapshotNamespaceVisitor(p), *this);
+  DECODE_FINISH(p);
+}
+
+void SnapshotNamespace::dump(Formatter *f) const {
+  boost::apply_visitor(
+    DumpSnapshotNamespaceVisitor(f, "snapshot_namespace_type"), *this);
+}
+
+void SnapshotNamespace::generate_test_instances(std::list<SnapshotNamespace*> &o) {
+  o.push_back(new SnapshotNamespace(UserSnapshotNamespace()));
+  o.push_back(new SnapshotNamespace(GroupSnapshotNamespace(0, "10152ae8944a",
+                                                           "2118643c9732")));
+  o.push_back(new SnapshotNamespace(GroupSnapshotNamespace(5, "1018643c9869",
+                                                           "33352be8933c")));
+  o.push_back(new SnapshotNamespace(TrashSnapshotNamespace()));
+  o.push_back(new SnapshotNamespace(MirrorSnapshotNamespace(MIRROR_SNAPSHOT_STATE_PRIMARY,
+                                                            {"peer uuid"},
+                                                            "", CEPH_NOSNAP)));
+  o.push_back(new SnapshotNamespace(MirrorSnapshotNamespace(MIRROR_SNAPSHOT_STATE_PRIMARY_DEMOTED,
+                                                            {"peer uuid"},
+                                                            "", CEPH_NOSNAP)));
+  o.push_back(new SnapshotNamespace(MirrorSnapshotNamespace(MIRROR_SNAPSHOT_STATE_NON_PRIMARY,
+                                                            {"peer uuid"},
+                                                            "uuid", 123)));
+  o.push_back(new SnapshotNamespace(MirrorSnapshotNamespace(MIRROR_SNAPSHOT_STATE_NON_PRIMARY_DEMOTED,
+                                                            {"peer uuid"},
+                                                            "uuid", 123)));
+}
+
+std::ostream& operator<<(std::ostream& os, const SnapshotNamespaceType& type) {
+  switch (type) {
+  case SNAPSHOT_NAMESPACE_TYPE_USER:
+    os << "user";
+    break;
+  case SNAPSHOT_NAMESPACE_TYPE_GROUP:
+    os << "group";
+    break;
+  case SNAPSHOT_NAMESPACE_TYPE_TRASH:
+    os << "trash";
+    break;
+  case SNAPSHOT_NAMESPACE_TYPE_MIRROR:
+    os << "mirror";
+    break;
+  default:
+    os << "unknown";
+    break;
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const UserSnapshotNamespace& ns) {
+  os << "[" << SNAPSHOT_NAMESPACE_TYPE_USER << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const GroupSnapshotNamespace& ns) {
+  os << "[" << SNAPSHOT_NAMESPACE_TYPE_GROUP << " "
+     << "group_pool=" << ns.group_pool << ", "
+     << "group_id=" << ns.group_id << ", "
+     << "group_snapshot_id=" << ns.group_snapshot_id << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const TrashSnapshotNamespace& ns) {
+  os << "[" << SNAPSHOT_NAMESPACE_TYPE_TRASH << " "
+     << "original_name=" << ns.original_name << ", "
+     << "original_snapshot_namespace=" << ns.original_snapshot_namespace_type
+     << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const MirrorSnapshotNamespace& ns) {
+  os << "[" << SNAPSHOT_NAMESPACE_TYPE_MIRROR << " "
+     << "state=" << ns.state << ", "
+     << "complete=" << ns.complete << ", "
+     << "mirror_peer_uuids=" << ns.mirror_peer_uuids << ", ";
+  if (ns.is_primary()) {
+     os << "clean_since_snap_id=" << ns.clean_since_snap_id;
+  } else {
+     os << "primary_mirror_uuid=" << ns.primary_mirror_uuid << ", "
+        << "primary_snap_id=" << ns.primary_snap_id << ", "
+        << "last_copied_object_number=" << ns.last_copied_object_number << ", "
+        << "snap_seqs=" << ns.snap_seqs;
+  }
+  os << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const UnknownSnapshotNamespace& ns) {
+  os << "[unknown]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, MirrorSnapshotState type) {
+  switch (type) {
+  case MIRROR_SNAPSHOT_STATE_PRIMARY:
+    os << "primary";
+    break;
+  case MIRROR_SNAPSHOT_STATE_PRIMARY_DEMOTED:
+    os << "primary (demoted)";
+    break;
+  case MIRROR_SNAPSHOT_STATE_NON_PRIMARY:
+    os << "non-primary";
+    break;
+  case MIRROR_SNAPSHOT_STATE_NON_PRIMARY_DEMOTED:
+    os << "non-primary (demoted)";
+    break;
+  default:
+    os << "unknown";
+    break;
+  }
+  return os;
+}
+
+void ImageSnapshotSpec::encode(bufferlist& bl) const {
+  using ceph::encode;
+  ENCODE_START(1, 1, bl);
+  encode(pool, bl);
+  encode(image_id, bl);
+  encode(snap_id, bl);
+  ENCODE_FINISH(bl);
+}
+
+void ImageSnapshotSpec::decode(bufferlist::const_iterator& it) {
+  using ceph::decode;
+  DECODE_START(1, it);
+  decode(pool, it);
+  decode(image_id, it);
+  decode(snap_id, it);
+  DECODE_FINISH(it);
+}
+
+void ImageSnapshotSpec::dump(Formatter *f) const {
+  f->dump_int("pool", pool);
+  f->dump_string("image_id", image_id);
+  f->dump_int("snap_id", snap_id);
+}
+
+void ImageSnapshotSpec::generate_test_instances(std::list<ImageSnapshotSpec *> &o) {
+  o.push_back(new ImageSnapshotSpec(0, "myimage", 2));
+  o.push_back(new ImageSnapshotSpec(1, "testimage", 7));
+}
+
+void GroupSnapshot::encode(bufferlist& bl) const {
+  using ceph::encode;
+  ENCODE_START(1, 1, bl);
+  encode(id, bl);
+  encode(name, bl);
+  encode(state, bl);
+  encode(snaps, bl);
+  ENCODE_FINISH(bl);
+}
+
+void GroupSnapshot::decode(bufferlist::const_iterator& it) {
+  using ceph::decode;
+  DECODE_START(1, it);
+  decode(id, it);
+  decode(name, it);
+  decode(state, it);
+  decode(snaps, it);
+  DECODE_FINISH(it);
+}
+
+void GroupSnapshot::dump(Formatter *f) const {
+  f->dump_string("id", id);
+  f->dump_string("name", name);
+  f->dump_int("state", state);
+}
+
+void GroupSnapshot::generate_test_instances(std::list<GroupSnapshot *> &o) {
+  o.push_back(new GroupSnapshot("10152ae8944a", "groupsnapshot1", GROUP_SNAPSHOT_STATE_INCOMPLETE));
+  o.push_back(new GroupSnapshot("1018643c9869", "groupsnapshot2", GROUP_SNAPSHOT_STATE_COMPLETE));
+}
+void TrashImageSpec::encode(bufferlist& bl) const {
+  ENCODE_START(2, 1, bl);
+  encode(source, bl);
+  encode(name, bl);
+  encode(deletion_time, bl);
+  encode(deferment_end_time, bl);
+  encode(state, bl);
+  ENCODE_FINISH(bl);
+}
+
+void TrashImageSpec::decode(bufferlist::const_iterator &it) {
+  DECODE_START(2, it);
+  decode(source, it);
+  decode(name, it);
+  decode(deletion_time, it);
+  decode(deferment_end_time, it);
+  if (struct_v >= 2) {
+    decode(state, it);
+  }
+  DECODE_FINISH(it);
+}
+
+void TrashImageSpec::dump(Formatter *f) const {
+  f->dump_stream("source") << source;
+  f->dump_string("name", name);
+  f->dump_unsigned("deletion_time", deletion_time);
+  f->dump_unsigned("deferment_end_time", deferment_end_time);
+}
+
+void MirrorImageMap::encode(bufferlist &bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(instance_id, bl);
+  encode(mapped_time, bl);
+  encode(data, bl);
+  ENCODE_FINISH(bl);
+}
+
+void MirrorImageMap::decode(bufferlist::const_iterator &it) {
+  DECODE_START(1, it);
+  decode(instance_id, it);
+  decode(mapped_time, it);
+  decode(data, it);
+  DECODE_FINISH(it);
+}
+
+void MirrorImageMap::dump(Formatter *f) const {
+  f->dump_string("instance_id", instance_id);
+  f->dump_stream("mapped_time") << mapped_time;
+
+  std::stringstream data_ss;
+  data.hexdump(data_ss);
+  f->dump_string("data", data_ss.str());
+}
+
+void MirrorImageMap::generate_test_instances(
+  std::list<MirrorImageMap*> &o) {
+  bufferlist data;
+  data.append(std::string(128, '1'));
+
+  o.push_back(new MirrorImageMap("uuid-123", utime_t(), data));
+  o.push_back(new MirrorImageMap("uuid-abc", utime_t(), data));
+}
+
+bool MirrorImageMap::operator==(const MirrorImageMap &rhs) const {
+  return instance_id == rhs.instance_id && mapped_time == rhs.mapped_time &&
+    data.contents_equal(rhs.data);
+}
+
+bool MirrorImageMap::operator<(const MirrorImageMap &rhs) const {
+  return instance_id < rhs.instance_id ||
+        (instance_id == rhs.instance_id && mapped_time < rhs.mapped_time);
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MirrorImageMap &image_map) {
+  return os << "[" << "instance_id=" << image_map.instance_id << ", mapped_time="
+            << image_map.mapped_time << "]";
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MigrationHeaderType& type) {
+  switch (type) {
+  case MIGRATION_HEADER_TYPE_SRC:
+    os << "source";
+    break;
+  case MIGRATION_HEADER_TYPE_DST:
+    os << "destination";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(type) << ")";
+    break;
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MigrationState& migration_state) {
+  switch (migration_state) {
+  case MIGRATION_STATE_ERROR:
+    os << "error";
+    break;
+  case MIGRATION_STATE_PREPARING:
+    os << "preparing";
+    break;
+  case MIGRATION_STATE_PREPARED:
+    os << "prepared";
+    break;
+  case MIGRATION_STATE_EXECUTING:
+    os << "executing";
+    break;
+  case MIGRATION_STATE_EXECUTED:
+    os << "executed";
+    break;
+  case MIGRATION_STATE_ABORTING:
+    os << "aborting";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(migration_state) << ")";
+    break;
+  }
+  return os;
+}
+
+void MigrationSpec::encode(bufferlist& bl) const {
+  uint8_t min_version = 1;
+  if (!source_spec.empty()) {
+    min_version = 3;
+  }
+
+  ENCODE_START(3, min_version, bl);
+  encode(header_type, bl);
+  encode(pool_id, bl);
+  encode(pool_namespace, bl);
+  encode(image_name, bl);
+  encode(image_id, bl);
+  encode(snap_seqs, bl);
+  encode(overlap, bl);
+  encode(flatten, bl);
+  encode(mirroring, bl);
+  encode(state, bl);
+  encode(state_description, bl);
+  encode(static_cast<uint8_t>(mirror_image_mode), bl);
+  encode(source_spec, bl);
+  ENCODE_FINISH(bl);
+}
+
+void MigrationSpec::decode(bufferlist::const_iterator& bl) {
+  DECODE_START(3, bl);
+  decode(header_type, bl);
+  decode(pool_id, bl);
+  decode(pool_namespace, bl);
+  decode(image_name, bl);
+  decode(image_id, bl);
+  decode(snap_seqs, bl);
+  decode(overlap, bl);
+  decode(flatten, bl);
+  decode(mirroring, bl);
+  decode(state, bl);
+  decode(state_description, bl);
+  if (struct_v >= 2) {
+    uint8_t int_mode;
+    decode(int_mode, bl);
+    mirror_image_mode = static_cast<MirrorImageMode>(int_mode);
+  }
+  if (struct_v >= 3) {
+    decode(source_spec, bl);
+  }
+  DECODE_FINISH(bl);
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const std::map<uint64_t, uint64_t>& snap_seqs) {
+  os << "{";
+  size_t count = 0;
+  for (auto &it : snap_seqs) {
+    os << (count++ > 0 ? ", " : "") << "(" << it.first << ", " << it.second
+       << ")";
+  }
+  os << "}";
+  return os;
+}
+
+void MigrationSpec::dump(Formatter *f) const {
+  f->dump_stream("header_type") << header_type;
+  if (header_type == MIGRATION_HEADER_TYPE_SRC ||
+      source_spec.empty()) {
+    f->dump_int("pool_id", pool_id);
+    f->dump_string("pool_namespace", pool_namespace);
+    f->dump_string("image_name", image_name);
+    f->dump_string("image_id", image_id);
+  } else {
+    f->dump_string("source_spec", source_spec);
+  }
+  f->dump_stream("snap_seqs") << snap_seqs;
+  f->dump_unsigned("overlap", overlap);
+  f->dump_bool("mirroring", mirroring);
+  f->dump_stream("mirror_image_mode") << mirror_image_mode;
+}
+
+void MigrationSpec::generate_test_instances(std::list<MigrationSpec*> &o) {
+  o.push_back(new MigrationSpec());
+  o.push_back(new MigrationSpec(MIGRATION_HEADER_TYPE_SRC, 1, "ns",
+                                "image_name", "image_id", "", {{1, 2}}, 123,
+                                true, MIRROR_IMAGE_MODE_SNAPSHOT, true,
+                                MIGRATION_STATE_PREPARED, "description"));
+  o.push_back(new MigrationSpec(MIGRATION_HEADER_TYPE_DST, -1, "", "", "",
+                                "{\"format\": \"raw\"}", {{1, 2}}, 123,
+                                true, MIRROR_IMAGE_MODE_SNAPSHOT, true,
+                                MIGRATION_STATE_PREPARED, "description"));
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const MigrationSpec& migration_spec) {
+  os << "["
+     << "header_type=" << migration_spec.header_type << ", ";
+  if (migration_spec.header_type == MIGRATION_HEADER_TYPE_SRC ||
+      migration_spec.source_spec.empty()) {
+    os << "pool_id=" << migration_spec.pool_id << ", "
+       << "pool_namespace=" << migration_spec.pool_namespace << ", "
+       << "image_name=" << migration_spec.image_name << ", "
+       << "image_id=" << migration_spec.image_id << ", ";
+  } else {
+     os << "source_spec=" << migration_spec.source_spec << ", ";
+  }
+  os << "snap_seqs=" << migration_spec.snap_seqs << ", "
+     << "overlap=" << migration_spec.overlap << ", "
+     << "flatten=" << migration_spec.flatten << ", "
+     << "mirroring=" << migration_spec.mirroring << ", "
+     << "mirror_image_mode=" << migration_spec.mirror_image_mode << ", "
+     << "state=" << migration_spec.state << ", "
+     << "state_description=" << migration_spec.state_description << "]";
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, const AssertSnapcSeqState& state) {
+  switch (state) {
+  case ASSERT_SNAPC_SEQ_GT_SNAPSET_SEQ:
+    os << "gt";
+    break;
+  case ASSERT_SNAPC_SEQ_LE_SNAPSET_SEQ:
+    os << "le";
+    break;
+  default:
+    os << "unknown (" << static_cast<uint32_t>(state) << ")";
+    break;
+  }
+  return os;
+}
+
+void sanitize_entity_inst(entity_inst_t* entity_inst) {
+  // make all addrs of type ANY because the type isn't what uniquely
+  // identifies them and clients and on-disk formats can be encoded
+  // with different backwards compatibility settings.
+  entity_inst->addr.set_type(entity_addr_t::TYPE_ANY);
+}
+
+} // namespace rbd
+} // namespace cls