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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <iostream>
#include "LogOperation.h"
#include "librbd/cache/pwl/Types.h"
#define dout_subsys ceph_subsys_rbd_pwl
#undef dout_prefix
#define dout_prefix *_dout << "librbd::cache::pwl::LogOperation: " << this \
<< " " << __func__ << ": "
namespace librbd {
namespace cache {
namespace pwl {
GenericLogOperation::GenericLogOperation(utime_t dispatch_time,
PerfCounters *perfcounter)
: m_perfcounter(perfcounter), dispatch_time(dispatch_time) {
}
std::ostream& GenericLogOperation::format(std::ostream &os) const {
os << "dispatch_time=[" << dispatch_time
<< "], buf_persist_start_time=[" << buf_persist_start_time
<< "], buf_persist_comp_time=[" << buf_persist_comp_time
<< "], log_append_start_time=[" << log_append_start_time
<< "], log_append_comp_time=[" << log_append_comp_time << "]";
return os;
}
std::ostream &operator<<(std::ostream &os,
const GenericLogOperation &op) {
return op.format(os);
}
SyncPointLogOperation::SyncPointLogOperation(ceph::mutex &lock,
std::shared_ptr<SyncPoint> sync_point,
utime_t dispatch_time,
PerfCounters *perfcounter,
CephContext *cct)
: GenericLogOperation(dispatch_time, perfcounter), m_cct(cct), m_lock(lock),
sync_point(sync_point) {
}
SyncPointLogOperation::~SyncPointLogOperation() { }
std::ostream &SyncPointLogOperation::format(std::ostream &os) const {
os << "(Sync Point) ";
GenericLogOperation::format(os);
os << ", sync_point=[" << *sync_point << "]";
return os;
}
std::ostream &operator<<(std::ostream &os,
const SyncPointLogOperation &op) {
return op.format(os);
}
std::vector<Context*> SyncPointLogOperation::append_sync_point() {
std::vector<Context*> appending_contexts;
std::lock_guard locker(m_lock);
if (!sync_point->appending) {
sync_point->appending = true;
}
appending_contexts.swap(sync_point->on_sync_point_appending);
return appending_contexts;
}
void SyncPointLogOperation::clear_earlier_sync_point() {
std::lock_guard locker(m_lock);
ceph_assert(sync_point->later_sync_point);
ceph_assert(sync_point->later_sync_point->earlier_sync_point == sync_point);
sync_point->later_sync_point->earlier_sync_point = nullptr;
sync_point->later_sync_point = nullptr;
}
std::vector<Context*> SyncPointLogOperation::swap_on_sync_point_persisted() {
std::lock_guard locker(m_lock);
std::vector<Context*> persisted_contexts;
persisted_contexts.swap(sync_point->on_sync_point_persisted);
return persisted_contexts;
}
void SyncPointLogOperation::appending() {
ceph_assert(sync_point);
ldout(m_cct, 20) << "Sync point op=[" << *this
<< "] appending" << dendl;
auto appending_contexts = append_sync_point();
for (auto &ctx : appending_contexts) {
ctx->complete(0);
}
}
void SyncPointLogOperation::complete(int result) {
ceph_assert(sync_point);
ldout(m_cct, 20) << "Sync point op =[" << *this
<< "] completed" << dendl;
clear_earlier_sync_point();
/* Do append now in case completion occurred before the
* normal append callback executed, and to handle
* on_append work that was queued after the sync point
* entered the appending state. */
appending();
auto persisted_contexts = swap_on_sync_point_persisted();
for (auto &ctx : persisted_contexts) {
ctx->complete(result);
}
}
GenericWriteLogOperation::GenericWriteLogOperation(std::shared_ptr<SyncPoint> sync_point,
utime_t dispatch_time,
PerfCounters *perfcounter,
CephContext *cct)
: GenericLogOperation(dispatch_time, perfcounter),
m_lock(ceph::make_mutex(pwl::unique_lock_name(
"librbd::cache::pwl::GenericWriteLogOperation::m_lock", this))),
m_cct(cct),
sync_point(sync_point) {
}
GenericWriteLogOperation::~GenericWriteLogOperation() { }
std::ostream &GenericWriteLogOperation::format(std::ostream &os) const {
GenericLogOperation::format(os);
return os;
}
std::ostream &operator<<(std::ostream &os,
const GenericWriteLogOperation &op) {
return op.format(os);
}
/* Called when the write log operation is appending and its log position is guaranteed */
void GenericWriteLogOperation::appending() {
Context *on_append = nullptr;
ldout(m_cct, 20) << __func__ << " " << this << dendl;
{
std::lock_guard locker(m_lock);
on_append = on_write_append;
on_write_append = nullptr;
}
if (on_append) {
ldout(m_cct, 20) << __func__ << " " << this << " on_append=" << on_append << dendl;
on_append->complete(0);
}
}
/* Called when the write log operation is completed in all log replicas */
void GenericWriteLogOperation::complete(int result) {
appending();
Context *on_persist = nullptr;
ldout(m_cct, 20) << __func__ << " " << this << dendl;
{
std::lock_guard locker(m_lock);
on_persist = on_write_persist;
on_write_persist = nullptr;
}
if (on_persist) {
ldout(m_cct, 20) << __func__ << " " << this << " on_persist=" << on_persist
<< dendl;
on_persist->complete(result);
}
}
WriteLogOperation::WriteLogOperation(
WriteLogOperationSet &set, uint64_t image_offset_bytes,
uint64_t write_bytes, CephContext *cct,
std::shared_ptr<WriteLogEntry> write_log_entry)
: GenericWriteLogOperation(set.sync_point, set.dispatch_time,
set.perfcounter, cct),
log_entry(write_log_entry) {
on_write_append = set.extent_ops_appending->new_sub();
on_write_persist = set.extent_ops_persist->new_sub();
log_entry->sync_point_entry->writes++;
log_entry->sync_point_entry->bytes += write_bytes;
}
WriteLogOperation::WriteLogOperation(WriteLogOperationSet &set,
uint64_t image_offset_bytes,
uint64_t write_bytes,
uint32_t data_len,
CephContext *cct,
std::shared_ptr<WriteLogEntry> writesame_log_entry)
: WriteLogOperation(set, image_offset_bytes, write_bytes, cct,
writesame_log_entry) {
is_writesame = true;
}
WriteLogOperation::~WriteLogOperation() { }
void WriteLogOperation::init(bool has_data, std::vector<WriteBufferAllocation>::iterator allocation,
uint64_t current_sync_gen,
uint64_t last_op_sequence_num,
bufferlist &write_req_bl, uint64_t buffer_offset,
bool persist_on_flush) {
log_entry->init(has_data, current_sync_gen, last_op_sequence_num,
persist_on_flush);
buffer_alloc = &(*allocation);
bl.substr_of(write_req_bl, buffer_offset, log_entry->write_bytes());
log_entry->init_cache_bl(write_req_bl, buffer_offset,
log_entry->write_bytes());
}
std::ostream &WriteLogOperation::format(std::ostream &os) const {
std::string op_name = is_writesame ? "(Write Same) " : "(Write) ";
os << op_name;
GenericWriteLogOperation::format(os);
if (log_entry) {
os << ", log_entry=[" << *log_entry << "]";
} else {
os << ", log_entry=nullptr";
}
os << ", bl=[" << bl << "], buffer_alloc=" << buffer_alloc;
return os;
}
std::ostream &operator<<(std::ostream &os,
const WriteLogOperation &op) {
return op.format(os);
}
void WriteLogOperation::complete(int result) {
GenericWriteLogOperation::complete(result);
m_perfcounter->tinc(l_librbd_pwl_log_op_dis_to_buf_t,
buf_persist_start_time - dispatch_time);
utime_t buf_persist_lat = buf_persist_comp_time - buf_persist_start_time;
m_perfcounter->tinc(l_librbd_pwl_log_op_buf_to_bufc_t, buf_persist_lat);
m_perfcounter->hinc(l_librbd_pwl_log_op_buf_to_bufc_t_hist,
buf_persist_lat.to_nsec(),
log_entry->ram_entry.write_bytes);
m_perfcounter->tinc(l_librbd_pwl_log_op_buf_to_app_t,
log_append_start_time - buf_persist_start_time);
}
WriteLogOperationSet::WriteLogOperationSet(utime_t dispatched, PerfCounters *perfcounter, std::shared_ptr<SyncPoint> sync_point,
bool persist_on_flush, CephContext *cct, Context *on_finish)
: m_cct(cct), m_on_finish(on_finish),
persist_on_flush(persist_on_flush),
dispatch_time(dispatched),
perfcounter(perfcounter),
sync_point(sync_point) {
on_ops_appending = sync_point->prior_persisted_gather_new_sub();
on_ops_persist = nullptr;
extent_ops_persist =
new C_Gather(m_cct,
new LambdaContext( [this](int r) {
ldout(this->m_cct,20) << __func__ << " " << this << " m_extent_ops_persist completed" << dendl;
if (on_ops_persist) {
on_ops_persist->complete(r);
}
m_on_finish->complete(r);
}));
auto appending_persist_sub = extent_ops_persist->new_sub();
extent_ops_appending =
new C_Gather(m_cct,
new LambdaContext( [this, appending_persist_sub](int r) {
ldout(this->m_cct, 20) << __func__ << " " << this << " m_extent_ops_appending completed" << dendl;
on_ops_appending->complete(r);
appending_persist_sub->complete(r);
}));
}
WriteLogOperationSet::~WriteLogOperationSet() { }
std::ostream &operator<<(std::ostream &os,
const WriteLogOperationSet &s) {
os << "cell=" << (void*)s.cell
<< ", extent_ops_appending=" << s.extent_ops_appending
<< ", extent_ops_persist=" << s.extent_ops_persist;
return os;
}
DiscardLogOperation::DiscardLogOperation(std::shared_ptr<SyncPoint> sync_point,
uint64_t image_offset_bytes,
uint64_t write_bytes,
uint32_t discard_granularity_bytes,
utime_t dispatch_time,
PerfCounters *perfcounter,
CephContext *cct)
: GenericWriteLogOperation(sync_point, dispatch_time, perfcounter, cct),
log_entry(std::make_shared<DiscardLogEntry>(sync_point->log_entry,
image_offset_bytes,
write_bytes,
discard_granularity_bytes)) {
on_write_persist = nullptr;
log_entry->sync_point_entry->writes++;
log_entry->sync_point_entry->bytes += write_bytes;
}
DiscardLogOperation::~DiscardLogOperation() { }
std::ostream &DiscardLogOperation::format(std::ostream &os) const {
os << "(Discard) ";
GenericWriteLogOperation::format(os);
if (log_entry) {
os << ", log_entry=[" << *log_entry << "]";
} else {
os << ", log_entry=nullptr";
}
return os;
}
std::ostream &operator<<(std::ostream &os,
const DiscardLogOperation &op) {
return op.format(os);
}
} // namespace pwl
} // namespace cache
} // namespace librbd
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