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// -*- 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) 2014 Adam Crume <adamcrume@gmail.com>
*
* 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 "actions.hpp"
#include <boost/foreach.hpp>
#include <cstdlib>
#include "PendingIO.hpp"
#include "rbd_replay_debug.hpp"
#define dout_context g_ceph_context
using namespace rbd_replay;
namespace {
std::string create_fake_data() {
char data[1 << 20]; // 1 MB
for (unsigned int i = 0; i < sizeof(data); i++) {
data[i] = (char) i;
}
return std::string(data, sizeof(data));
}
struct ConstructVisitor : public boost::static_visitor<Action::ptr> {
inline Action::ptr operator()(const action::StartThreadAction &action) const {
return Action::ptr(new StartThreadAction(action));
}
inline Action::ptr operator()(const action::StopThreadAction &action) const{
return Action::ptr(new StopThreadAction(action));
}
inline Action::ptr operator()(const action::ReadAction &action) const {
return Action::ptr(new ReadAction(action));
}
inline Action::ptr operator()(const action::AioReadAction &action) const {
return Action::ptr(new AioReadAction(action));
}
inline Action::ptr operator()(const action::WriteAction &action) const {
return Action::ptr(new WriteAction(action));
}
inline Action::ptr operator()(const action::AioWriteAction &action) const {
return Action::ptr(new AioWriteAction(action));
}
inline Action::ptr operator()(const action::DiscardAction &action) const {
return Action::ptr(new DiscardAction(action));
}
inline Action::ptr operator()(const action::AioDiscardAction &action) const {
return Action::ptr(new AioDiscardAction(action));
}
inline Action::ptr operator()(const action::OpenImageAction &action) const {
return Action::ptr(new OpenImageAction(action));
}
inline Action::ptr operator()(const action::CloseImageAction &action) const {
return Action::ptr(new CloseImageAction(action));
}
inline Action::ptr operator()(const action::AioOpenImageAction &action) const {
return Action::ptr(new AioOpenImageAction(action));
}
inline Action::ptr operator()(const action::AioCloseImageAction &action) const {
return Action::ptr(new AioCloseImageAction(action));
}
inline Action::ptr operator()(const action::UnknownAction &action) const {
return Action::ptr();
}
};
} // anonymous namespace
std::ostream& rbd_replay::operator<<(std::ostream& o, const Action& a) {
return a.dump(o);
}
Action::ptr Action::construct(const action::ActionEntry &action_entry) {
return boost::apply_visitor(ConstructVisitor(), action_entry.action);
}
void StartThreadAction::perform(ActionCtx &ctx) {
cerr << "StartThreadAction should never actually be performed" << std::endl;
exit(1);
}
void StopThreadAction::perform(ActionCtx &ctx) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
ctx.stop();
}
void AioReadAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
ceph_assert(image);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
int r = image->aio_read(m_action.offset, m_action.length, io->bufferlist(), &io->completion());
assertf(r >= 0, "id = %d, r = %d", id(), r);
}
void ReadAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
ssize_t r = image->read(m_action.offset, m_action.length, io->bufferlist());
assertf(r >= 0, "id = %d, r = %d", id(), r);
worker.remove_pending(io);
}
void AioWriteAction::perform(ActionCtx &worker) {
static const std::string fake_data(create_fake_data());
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
uint64_t remaining = m_action.length;
while (remaining > 0) {
uint64_t n = std::min(remaining, (uint64_t)fake_data.length());
io->bufferlist().append(fake_data.data(), n);
remaining -= n;
}
worker.add_pending(io);
if (worker.readonly()) {
worker.remove_pending(io);
} else {
int r = image->aio_write(m_action.offset, m_action.length, io->bufferlist(), &io->completion());
assertf(r >= 0, "id = %d, r = %d", id(), r);
}
}
void WriteAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
io->bufferlist().append_zero(m_action.length);
if (!worker.readonly()) {
ssize_t r = image->write(m_action.offset, m_action.length, io->bufferlist());
assertf(r >= 0, "id = %d, r = %d", id(), r);
}
worker.remove_pending(io);
}
void AioDiscardAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
if (worker.readonly()) {
worker.remove_pending(io);
} else {
int r = image->aio_discard(m_action.offset, m_action.length, &io->completion());
assertf(r >= 0, "id = %d, r = %d", id(), r);
}
}
void DiscardAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
librbd::Image *image = worker.get_image(m_action.imagectx_id);
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
if (!worker.readonly()) {
ssize_t r = image->discard(m_action.offset, m_action.length);
assertf(r >= 0, "id = %d, r = %d", id(), r);
}
worker.remove_pending(io);
}
void OpenImageAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
librbd::Image *image = new librbd::Image();
librbd::RBD *rbd = worker.rbd();
rbd_loc name(worker.map_image_name(m_action.name, m_action.snap_name));
int r;
if (m_action.read_only || worker.readonly()) {
r = rbd->open_read_only(*worker.ioctx(), *image, name.image.c_str(), name.snap.c_str());
} else {
r = rbd->open(*worker.ioctx(), *image, name.image.c_str(), name.snap.c_str());
}
if (r) {
cerr << "Unable to open image '" << m_action.name
<< "' with snap '" << m_action.snap_name
<< "' (mapped to '" << name.str()
<< "') and readonly " << m_action.read_only
<< ": (" << -r << ") " << strerror(-r) << std::endl;
exit(1);
}
worker.put_image(m_action.imagectx_id, image);
worker.remove_pending(io);
}
void CloseImageAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
worker.erase_image(m_action.imagectx_id);
worker.set_action_complete(pending_io_id());
}
void AioOpenImageAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
// TODO: Make it async
PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
worker.add_pending(io);
librbd::Image *image = new librbd::Image();
librbd::RBD *rbd = worker.rbd();
rbd_loc name(worker.map_image_name(m_action.name, m_action.snap_name));
int r;
if (m_action.read_only || worker.readonly()) {
r = rbd->open_read_only(*worker.ioctx(), *image, name.image.c_str(), name.snap.c_str());
} else {
r = rbd->open(*worker.ioctx(), *image, name.image.c_str(), name.snap.c_str());
}
if (r) {
cerr << "Unable to open image '" << m_action.name
<< "' with snap '" << m_action.snap_name
<< "' (mapped to '" << name.str()
<< "') and readonly " << m_action.read_only
<< ": (" << -r << ") " << strerror(-r) << std::endl;
exit(1);
}
worker.put_image(m_action.imagectx_id, image);
worker.remove_pending(io);
}
void AioCloseImageAction::perform(ActionCtx &worker) {
dout(ACTION_LEVEL) << "Performing " << *this << dendl;
// TODO: Make it async
worker.erase_image(m_action.imagectx_id);
worker.set_action_complete(pending_io_id());
}
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