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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/MirroringWatcher.h"
#include "include/rbd_types.h"
#include "include/rados/librados.hpp"
#include "common/errno.h"
#include "common/Cond.h"
#include "librbd/Utils.h"
#include "librbd/watcher/Utils.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::MirroringWatcher: "
namespace librbd {
using namespace mirroring_watcher;
using namespace watcher;
using librbd::util::create_rados_callback;
namespace {
static const uint64_t NOTIFY_TIMEOUT_MS = 5000;
} // anonymous namespace
template <typename I>
MirroringWatcher<I>::MirroringWatcher(librados::IoCtx &io_ctx,
ContextWQ *work_queue)
: Watcher(io_ctx, work_queue, RBD_MIRRORING) {
}
template <typename I>
int MirroringWatcher<I>::notify_mode_updated(librados::IoCtx &io_ctx,
cls::rbd::MirrorMode mirror_mode) {
C_SaferCond ctx;
notify_mode_updated(io_ctx, mirror_mode, &ctx);
return ctx.wait();
}
template <typename I>
void MirroringWatcher<I>::notify_mode_updated(librados::IoCtx &io_ctx,
cls::rbd::MirrorMode mirror_mode,
Context *on_finish) {
CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
ldout(cct, 20) << dendl;
bufferlist bl;
encode(NotifyMessage{ModeUpdatedPayload{mirror_mode}}, bl);
librados::AioCompletion *comp = create_rados_callback(on_finish);
int r = io_ctx.aio_notify(RBD_MIRRORING, comp, bl, NOTIFY_TIMEOUT_MS,
nullptr);
ceph_assert(r == 0);
comp->release();
}
template <typename I>
int MirroringWatcher<I>::notify_image_updated(
librados::IoCtx &io_ctx, cls::rbd::MirrorImageState mirror_image_state,
const std::string &image_id, const std::string &global_image_id) {
C_SaferCond ctx;
notify_image_updated(io_ctx, mirror_image_state, image_id, global_image_id,
&ctx);
return ctx.wait();
}
template <typename I>
void MirroringWatcher<I>::notify_image_updated(
librados::IoCtx &io_ctx, cls::rbd::MirrorImageState mirror_image_state,
const std::string &image_id, const std::string &global_image_id,
Context *on_finish) {
CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
ldout(cct, 20) << dendl;
bufferlist bl;
encode(NotifyMessage{ImageUpdatedPayload{
mirror_image_state, image_id, global_image_id}}, bl);
librados::AioCompletion *comp = create_rados_callback(on_finish);
int r = io_ctx.aio_notify(RBD_MIRRORING, comp, bl, NOTIFY_TIMEOUT_MS,
nullptr);
ceph_assert(r == 0);
comp->release();
}
template <typename I>
void MirroringWatcher<I>::handle_notify(uint64_t notify_id, uint64_t handle,
uint64_t notifier_id, bufferlist &bl) {
CephContext *cct = this->m_cct;
ldout(cct, 15) << ": notify_id=" << notify_id << ", "
<< "handle=" << handle << dendl;
NotifyMessage notify_message;
try {
auto iter = bl.cbegin();
decode(notify_message, iter);
} catch (const buffer::error &err) {
lderr(cct) << ": error decoding image notification: " << err.what()
<< dendl;
Context *ctx = new C_NotifyAck(this, notify_id, handle);
ctx->complete(0);
return;
}
apply_visitor(watcher::util::HandlePayloadVisitor<MirroringWatcher<I>>(
this, notify_id, handle), notify_message.payload);
}
template <typename I>
bool MirroringWatcher<I>::handle_payload(const ModeUpdatedPayload &payload,
Context *on_notify_ack) {
CephContext *cct = this->m_cct;
ldout(cct, 20) << ": mode updated: " << payload.mirror_mode << dendl;
handle_mode_updated(payload.mirror_mode);
return true;
}
template <typename I>
bool MirroringWatcher<I>::handle_payload(const ImageUpdatedPayload &payload,
Context *on_notify_ack) {
CephContext *cct = this->m_cct;
ldout(cct, 20) << ": image state updated" << dendl;
handle_image_updated(payload.mirror_image_state, payload.image_id,
payload.global_image_id);
return true;
}
template <typename I>
bool MirroringWatcher<I>::handle_payload(const UnknownPayload &payload,
Context *on_notify_ack) {
return true;
}
} // namespace librbd
template class librbd::MirroringWatcher<librbd::ImageCtx>;
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