/
JournalMetadata.cc
1118 lines (923 loc) · 33.5 KB
/
JournalMetadata.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "journal/JournalMetadata.h"
#include "journal/Utils.h"
#include "common/errno.h"
#include "common/Timer.h"
#include "cls/journal/cls_journal_client.h"
#include <functional>
#include <set>
#define dout_subsys ceph_subsys_journaler
#undef dout_prefix
#define dout_prefix *_dout << "JournalMetadata: " << this << " "
namespace journal {
using namespace cls::journal;
namespace {
struct C_GetClient : public Context {
CephContext *cct;
librados::IoCtx &ioctx;
const std::string &oid;
AsyncOpTracker &async_op_tracker;
std::string client_id;
cls::journal::Client *client;
Context *on_finish;
bufferlist out_bl;
C_GetClient(CephContext *cct, librados::IoCtx &ioctx, const std::string &oid,
AsyncOpTracker &async_op_tracker, const std::string &client_id,
cls::journal::Client *client, Context *on_finish)
: cct(cct), ioctx(ioctx), oid(oid), async_op_tracker(async_op_tracker),
client_id(client_id), client(client), on_finish(on_finish) {
async_op_tracker.start_op();
}
virtual ~C_GetClient() {
async_op_tracker.finish_op();
}
virtual void send() {
send_get_client();
}
void send_get_client() {
ldout(cct, 20) << "C_GetClient: " << __func__ << dendl;
librados::ObjectReadOperation op;
client::get_client_start(&op, client_id);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_GetClient, &C_GetClient::handle_get_client>);
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_get_client(int r) {
ldout(cct, 20) << "C_GetClient: " << __func__ << ": r=" << r << dendl;
if (r == 0) {
bufferlist::iterator it = out_bl.begin();
r = client::get_client_finish(&it, client);
}
complete(r);
}
virtual void finish(int r) override {
on_finish->complete(r);
}
};
struct C_AllocateTag : public Context {
CephContext *cct;
librados::IoCtx &ioctx;
const std::string &oid;
AsyncOpTracker &async_op_tracker;
uint64_t tag_class;
Tag *tag;
Context *on_finish;
bufferlist out_bl;
C_AllocateTag(CephContext *cct, librados::IoCtx &ioctx,
const std::string &oid, AsyncOpTracker &async_op_tracker,
uint64_t tag_class, const bufferlist &data, Tag *tag,
Context *on_finish)
: cct(cct), ioctx(ioctx), oid(oid), async_op_tracker(async_op_tracker),
tag_class(tag_class), tag(tag), on_finish(on_finish) {
async_op_tracker.start_op();
tag->data = data;
}
virtual ~C_AllocateTag() {
async_op_tracker.finish_op();
}
void send() {
send_get_next_tag_tid();
}
void send_get_next_tag_tid() {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << dendl;
librados::ObjectReadOperation op;
client::get_next_tag_tid_start(&op);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_AllocateTag, &C_AllocateTag::handle_get_next_tag_tid>);
out_bl.clear();
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_get_next_tag_tid(int r) {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << ": r=" << r << dendl;
if (r == 0) {
bufferlist::iterator iter = out_bl.begin();
r = client::get_next_tag_tid_finish(&iter, &tag->tid);
}
if (r < 0) {
complete(r);
return;
}
send_tag_create();
}
void send_tag_create() {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << dendl;
librados::ObjectWriteOperation op;
client::tag_create(&op, tag->tid, tag_class, tag->data);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_AllocateTag, &C_AllocateTag::handle_tag_create>);
int r = ioctx.aio_operate(oid, comp, &op);
assert(r == 0);
comp->release();
}
void handle_tag_create(int r) {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << ": r=" << r << dendl;
if (r == -ESTALE) {
send_get_next_tag_tid();
return;
} else if (r < 0) {
complete(r);
return;
}
send_get_tag();
}
void send_get_tag() {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << dendl;
librados::ObjectReadOperation op;
client::get_tag_start(&op, tag->tid);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_AllocateTag, &C_AllocateTag::handle_get_tag>);
out_bl.clear();
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_get_tag(int r) {
ldout(cct, 20) << "C_AllocateTag: " << __func__ << ": r=" << r << dendl;
if (r == 0) {
bufferlist::iterator iter = out_bl.begin();
cls::journal::Tag journal_tag;
r = client::get_tag_finish(&iter, &journal_tag);
if (r == 0) {
*tag = journal_tag;
}
}
complete(r);
}
virtual void finish(int r) override {
on_finish->complete(r);
}
};
struct C_GetTag : public Context {
CephContext *cct;
librados::IoCtx &ioctx;
const std::string &oid;
AsyncOpTracker &async_op_tracker;
uint64_t tag_tid;
JournalMetadata::Tag *tag;
Context *on_finish;
bufferlist out_bl;
C_GetTag(CephContext *cct, librados::IoCtx &ioctx, const std::string &oid,
AsyncOpTracker &async_op_tracker, uint64_t tag_tid,
JournalMetadata::Tag *tag, Context *on_finish)
: cct(cct), ioctx(ioctx), oid(oid), async_op_tracker(async_op_tracker),
tag_tid(tag_tid), tag(tag), on_finish(on_finish) {
async_op_tracker.start_op();
}
virtual ~C_GetTag() {
async_op_tracker.finish_op();
}
void send() {
send_get_tag();
}
void send_get_tag() {
librados::ObjectReadOperation op;
client::get_tag_start(&op, tag_tid);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_GetTag, &C_GetTag::handle_get_tag>);
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_get_tag(int r) {
if (r == 0) {
bufferlist::iterator iter = out_bl.begin();
r = client::get_tag_finish(&iter, tag);
}
complete(r);
}
virtual void finish(int r) override {
on_finish->complete(r);
}
};
struct C_GetTags : public Context {
CephContext *cct;
librados::IoCtx &ioctx;
const std::string &oid;
const std::string &client_id;
AsyncOpTracker &async_op_tracker;
uint64_t start_after_tag_tid;
boost::optional<uint64_t> tag_class;
JournalMetadata::Tags *tags;
Context *on_finish;
const uint64_t MAX_RETURN = 64;
bufferlist out_bl;
C_GetTags(CephContext *cct, librados::IoCtx &ioctx, const std::string &oid,
const std::string &client_id, AsyncOpTracker &async_op_tracker,
uint64_t start_after_tag_tid,
const boost::optional<uint64_t> &tag_class,
JournalMetadata::Tags *tags, Context *on_finish)
: cct(cct), ioctx(ioctx), oid(oid), client_id(client_id),
async_op_tracker(async_op_tracker),
start_after_tag_tid(start_after_tag_tid), tag_class(tag_class),
tags(tags), on_finish(on_finish) {
async_op_tracker.start_op();
}
virtual ~C_GetTags() {
async_op_tracker.finish_op();
}
void send() {
send_tag_list();
}
void send_tag_list() {
librados::ObjectReadOperation op;
client::tag_list_start(&op, start_after_tag_tid, MAX_RETURN, client_id,
tag_class);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_GetTags, &C_GetTags::handle_tag_list>);
out_bl.clear();
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_tag_list(int r) {
if (r == 0) {
std::set<cls::journal::Tag> journal_tags;
bufferlist::iterator iter = out_bl.begin();
r = client::tag_list_finish(&iter, &journal_tags);
if (r == 0) {
for (auto &journal_tag : journal_tags) {
tags->push_back(journal_tag);
start_after_tag_tid = journal_tag.tid;
}
if (journal_tags.size() == MAX_RETURN) {
send_tag_list();
return;
}
}
}
complete(r);
}
virtual void finish(int r) override {
on_finish->complete(r);
}
};
struct C_FlushCommitPosition : public Context {
Context *commit_position_ctx;
Context *on_finish;
C_FlushCommitPosition(Context *commit_position_ctx, Context *on_finish)
: commit_position_ctx(commit_position_ctx), on_finish(on_finish) {
}
virtual void finish(int r) override {
if (commit_position_ctx != nullptr) {
commit_position_ctx->complete(r);
}
on_finish->complete(r);
}
};
struct C_AssertActiveTag : public Context {
CephContext *cct;
librados::IoCtx &ioctx;
const std::string &oid;
AsyncOpTracker &async_op_tracker;
std::string client_id;
uint64_t tag_tid;
Context *on_finish;
bufferlist out_bl;
C_AssertActiveTag(CephContext *cct, librados::IoCtx &ioctx,
const std::string &oid, AsyncOpTracker &async_op_tracker,
const std::string &client_id, uint64_t tag_tid,
Context *on_finish)
: cct(cct), ioctx(ioctx), oid(oid), async_op_tracker(async_op_tracker),
client_id(client_id), tag_tid(tag_tid), on_finish(on_finish) {
async_op_tracker.start_op();
}
virtual ~C_AssertActiveTag() {
async_op_tracker.finish_op();
}
void send() {
ldout(cct, 20) << "C_AssertActiveTag: " << __func__ << dendl;
librados::ObjectReadOperation op;
client::tag_list_start(&op, tag_tid, 2, client_id, boost::none);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
this, nullptr, &utils::rados_state_callback<
C_AssertActiveTag, &C_AssertActiveTag::handle_send>);
int r = ioctx.aio_operate(oid, comp, &op, &out_bl);
assert(r == 0);
comp->release();
}
void handle_send(int r) {
ldout(cct, 20) << "C_AssertActiveTag: " << __func__ << ": r=" << r << dendl;
std::set<cls::journal::Tag> tags;
if (r == 0) {
bufferlist::iterator it = out_bl.begin();
r = client::tag_list_finish(&it, &tags);
}
// NOTE: since 0 is treated as an uninitialized list filter, we need to
// load to entries and look at the last tid
if (r == 0 && !tags.empty() && tags.rbegin()->tid > tag_tid) {
r = -ESTALE;
}
complete(r);
}
virtual void finish(int r) {
on_finish->complete(r);
}
};
} // anonymous namespace
JournalMetadata::JournalMetadata(ContextWQ *work_queue, SafeTimer *timer,
Mutex *timer_lock, librados::IoCtx &ioctx,
const std::string &oid,
const std::string &client_id,
const Settings &settings)
: RefCountedObject(NULL, 0), m_cct(NULL), m_oid(oid),
m_client_id(client_id), m_settings(settings), m_order(0),
m_splay_width(0), m_pool_id(-1), m_initialized(false),
m_work_queue(work_queue), m_timer(timer), m_timer_lock(timer_lock),
m_lock("JournalMetadata::m_lock"), m_commit_tid(0), m_watch_ctx(this),
m_watch_handle(0), m_minimum_set(0), m_active_set(0),
m_update_notifications(0), m_commit_position_ctx(NULL),
m_commit_position_task_ctx(NULL) {
m_ioctx.dup(ioctx);
m_cct = reinterpret_cast<CephContext*>(m_ioctx.cct());
}
JournalMetadata::~JournalMetadata() {
Mutex::Locker locker(m_lock);
assert(!m_initialized);
}
void JournalMetadata::init(Context *on_finish) {
{
Mutex::Locker locker(m_lock);
assert(!m_initialized);
m_initialized = true;
}
// chain the init sequence (reverse order)
on_finish = utils::create_async_context_callback(
this, on_finish);
on_finish = new C_ImmutableMetadata(this, on_finish);
on_finish = new FunctionContext([this, on_finish](int r) {
if (r < 0) {
lderr(m_cct) << __func__ << ": failed to watch journal"
<< cpp_strerror(r) << dendl;
Mutex::Locker locker(m_lock);
m_watch_handle = 0;
on_finish->complete(r);
return;
}
get_immutable_metadata(&m_order, &m_splay_width, &m_pool_id, on_finish);
});
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
on_finish, nullptr, utils::rados_ctx_callback);
int r = m_ioctx.aio_watch(m_oid, comp, &m_watch_handle, &m_watch_ctx);
assert(r == 0);
comp->release();
}
void JournalMetadata::shut_down(Context *on_finish) {
ldout(m_cct, 20) << __func__ << dendl;
uint64_t watch_handle = 0;
{
Mutex::Locker locker(m_lock);
m_initialized = false;
std::swap(watch_handle, m_watch_handle);
}
// chain the shut down sequence (reverse order)
on_finish = utils::create_async_context_callback(
this, on_finish);
on_finish = new FunctionContext([this, on_finish](int r) {
ldout(m_cct, 20) << "shut_down: waiting for ops" << dendl;
m_async_op_tracker.wait_for_ops(on_finish);
});
on_finish = new FunctionContext([this, on_finish](int r) {
ldout(m_cct, 20) << "shut_down: flushing watch" << dendl;
librados::Rados rados(m_ioctx);
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
on_finish, nullptr, utils::rados_ctx_callback);
r = rados.aio_watch_flush(comp);
assert(r == 0);
comp->release();
});
on_finish = new FunctionContext([this, on_finish](int r) {
flush_commit_position(on_finish);
});
if (watch_handle != 0) {
librados::AioCompletion *comp = librados::Rados::aio_create_completion(
on_finish, nullptr, utils::rados_ctx_callback);
int r = m_ioctx.aio_unwatch(watch_handle, comp);
assert(r == 0);
comp->release();
} else {
on_finish->complete(0);
}
}
void JournalMetadata::get_immutable_metadata(uint8_t *order,
uint8_t *splay_width,
int64_t *pool_id,
Context *on_finish) {
client::get_immutable_metadata(m_ioctx, m_oid, order, splay_width, pool_id,
on_finish);
}
void JournalMetadata::get_mutable_metadata(uint64_t *minimum_set,
uint64_t *active_set,
RegisteredClients *clients,
Context *on_finish) {
client::get_mutable_metadata(m_ioctx, m_oid, minimum_set, active_set, clients,
on_finish);
}
void JournalMetadata::register_client(const bufferlist &data,
Context *on_finish) {
ldout(m_cct, 10) << __func__ << ": " << m_client_id << dendl;
librados::ObjectWriteOperation op;
client::client_register(&op, m_client_id, data);
C_NotifyUpdate *ctx = new C_NotifyUpdate(this, on_finish);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
}
void JournalMetadata::update_client(const bufferlist &data,
Context *on_finish) {
ldout(m_cct, 10) << __func__ << ": " << m_client_id << dendl;
librados::ObjectWriteOperation op;
client::client_update_data(&op, m_client_id, data);
C_NotifyUpdate *ctx = new C_NotifyUpdate(this, on_finish);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
}
void JournalMetadata::unregister_client(Context *on_finish) {
assert(!m_client_id.empty());
ldout(m_cct, 10) << __func__ << ": " << m_client_id << dendl;
librados::ObjectWriteOperation op;
client::client_unregister(&op, m_client_id);
C_NotifyUpdate *ctx = new C_NotifyUpdate(this, on_finish);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
}
void JournalMetadata::allocate_tag(uint64_t tag_class, const bufferlist &data,
Tag *tag, Context *on_finish) {
on_finish = new C_NotifyUpdate(this, on_finish);
C_AllocateTag *ctx = new C_AllocateTag(m_cct, m_ioctx, m_oid,
m_async_op_tracker, tag_class,
data, tag, on_finish);
ctx->send();
}
void JournalMetadata::get_client(const std::string &client_id,
cls::journal::Client *client,
Context *on_finish) {
C_GetClient *ctx = new C_GetClient(m_cct, m_ioctx, m_oid, m_async_op_tracker,
client_id, client, on_finish);
ctx->send();
}
void JournalMetadata::get_tag(uint64_t tag_tid, Tag *tag, Context *on_finish) {
C_GetTag *ctx = new C_GetTag(m_cct, m_ioctx, m_oid, m_async_op_tracker,
tag_tid, tag, on_finish);
ctx->send();
}
void JournalMetadata::get_tags(uint64_t start_after_tag_tid,
const boost::optional<uint64_t> &tag_class,
Tags *tags, Context *on_finish) {
C_GetTags *ctx = new C_GetTags(m_cct, m_ioctx, m_oid, m_client_id,
m_async_op_tracker, start_after_tag_tid,
tag_class, tags, on_finish);
ctx->send();
}
void JournalMetadata::add_listener(JournalMetadataListener *listener) {
Mutex::Locker locker(m_lock);
while (m_update_notifications > 0) {
m_update_cond.Wait(m_lock);
}
m_listeners.push_back(listener);
}
void JournalMetadata::remove_listener(JournalMetadataListener *listener) {
Mutex::Locker locker(m_lock);
while (m_update_notifications > 0) {
m_update_cond.Wait(m_lock);
}
m_listeners.remove(listener);
}
void JournalMetadata::set_minimum_set(uint64_t object_set) {
Mutex::Locker locker(m_lock);
ldout(m_cct, 20) << __func__ << ": current=" << m_minimum_set
<< ", new=" << object_set << dendl;
if (m_minimum_set >= object_set) {
return;
}
librados::ObjectWriteOperation op;
client::set_minimum_set(&op, object_set);
C_NotifyUpdate *ctx = new C_NotifyUpdate(this);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
m_minimum_set = object_set;
}
int JournalMetadata::set_active_set(uint64_t object_set) {
C_SaferCond ctx;
set_active_set(object_set, &ctx);
return ctx.wait();
}
void JournalMetadata::set_active_set(uint64_t object_set, Context *on_finish) {
Mutex::Locker locker(m_lock);
ldout(m_cct, 20) << __func__ << ": current=" << m_active_set
<< ", new=" << object_set << dendl;
if (m_active_set >= object_set) {
m_work_queue->queue(on_finish, 0);
return;
}
librados::ObjectWriteOperation op;
client::set_active_set(&op, object_set);
C_NotifyUpdate *ctx = new C_NotifyUpdate(this, on_finish);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
m_active_set = object_set;
}
void JournalMetadata::assert_active_tag(uint64_t tag_tid, Context *on_finish) {
Mutex::Locker locker(m_lock);
C_AssertActiveTag *ctx = new C_AssertActiveTag(m_cct, m_ioctx, m_oid,
m_async_op_tracker,
m_client_id, tag_tid,
on_finish);
ctx->send();
}
void JournalMetadata::flush_commit_position() {
ldout(m_cct, 20) << __func__ << dendl;
Mutex::Locker timer_locker(*m_timer_lock);
Mutex::Locker locker(m_lock);
if (m_commit_position_ctx == nullptr) {
return;
}
cancel_commit_task();
handle_commit_position_task();
}
void JournalMetadata::flush_commit_position(Context *on_safe) {
ldout(m_cct, 20) << __func__ << dendl;
Mutex::Locker timer_locker(*m_timer_lock);
Mutex::Locker locker(m_lock);
if (m_commit_position_ctx == nullptr) {
// nothing to flush
if (on_safe != nullptr) {
m_work_queue->queue(on_safe, 0);
}
return;
}
if (on_safe != nullptr) {
m_commit_position_ctx = new C_FlushCommitPosition(
m_commit_position_ctx, on_safe);
}
cancel_commit_task();
handle_commit_position_task();
}
void JournalMetadata::reserve_entry_tid(uint64_t tag_tid, uint64_t entry_tid) {
Mutex::Locker locker(m_lock);
uint64_t &allocated_entry_tid = m_allocated_entry_tids[tag_tid];
if (allocated_entry_tid <= entry_tid) {
allocated_entry_tid = entry_tid + 1;
}
}
bool JournalMetadata::get_last_allocated_entry_tid(uint64_t tag_tid,
uint64_t *entry_tid) const {
Mutex::Locker locker(m_lock);
AllocatedEntryTids::const_iterator it = m_allocated_entry_tids.find(tag_tid);
if (it == m_allocated_entry_tids.end()) {
return false;
}
assert(it->second > 0);
*entry_tid = it->second - 1;
return true;
}
void JournalMetadata::handle_immutable_metadata(int r, Context *on_init) {
if (r < 0) {
lderr(m_cct) << "failed to initialize immutable metadata: "
<< cpp_strerror(r) << dendl;
on_init->complete(r);
return;
}
ldout(m_cct, 10) << "initialized immutable metadata" << dendl;
refresh(on_init);
}
void JournalMetadata::refresh(Context *on_complete) {
ldout(m_cct, 10) << "refreshing mutable metadata" << dendl;
C_Refresh *refresh = new C_Refresh(this, on_complete);
get_mutable_metadata(&refresh->minimum_set, &refresh->active_set,
&refresh->registered_clients, refresh);
}
void JournalMetadata::handle_refresh_complete(C_Refresh *refresh, int r) {
ldout(m_cct, 10) << "refreshed mutable metadata: r=" << r << dendl;
if (r == 0) {
Mutex::Locker locker(m_lock);
Client client(m_client_id, bufferlist());
RegisteredClients::iterator it = refresh->registered_clients.find(client);
if (it != refresh->registered_clients.end()) {
if (it->state == cls::journal::CLIENT_STATE_DISCONNECTED) {
ldout(m_cct, 0) << "client flagged disconnected: " << m_client_id
<< dendl;
}
m_minimum_set = MAX(m_minimum_set, refresh->minimum_set);
m_active_set = MAX(m_active_set, refresh->active_set);
m_registered_clients = refresh->registered_clients;
m_client = *it;
++m_update_notifications;
m_lock.Unlock();
for (Listeners::iterator it = m_listeners.begin();
it != m_listeners.end(); ++it) {
(*it)->handle_update(this);
}
m_lock.Lock();
if (--m_update_notifications == 0) {
m_update_cond.Signal();
}
} else {
lderr(m_cct) << "failed to locate client: " << m_client_id << dendl;
r = -ENOENT;
}
}
if (refresh->on_finish != NULL) {
refresh->on_finish->complete(r);
}
}
void JournalMetadata::cancel_commit_task() {
ldout(m_cct, 20) << __func__ << dendl;
assert(m_timer_lock->is_locked());
assert(m_lock.is_locked());
assert(m_commit_position_ctx != nullptr);
assert(m_commit_position_task_ctx != nullptr);
m_timer->cancel_event(m_commit_position_task_ctx);
m_commit_position_task_ctx = NULL;
}
void JournalMetadata::schedule_commit_task() {
ldout(m_cct, 20) << __func__ << dendl;
assert(m_timer_lock->is_locked());
assert(m_lock.is_locked());
assert(m_commit_position_ctx != nullptr);
if (m_commit_position_task_ctx == NULL) {
m_commit_position_task_ctx = new C_CommitPositionTask(this);
m_timer->add_event_after(m_settings.commit_interval,
m_commit_position_task_ctx);
}
}
void JournalMetadata::handle_commit_position_task() {
assert(m_timer_lock->is_locked());
assert(m_lock.is_locked());
ldout(m_cct, 20) << __func__ << ": "
<< "client_id=" << m_client_id << ", "
<< "commit_position=" << m_commit_position << dendl;
librados::ObjectWriteOperation op;
client::client_commit(&op, m_client_id, m_commit_position);
Context *ctx = new C_NotifyUpdate(this, m_commit_position_ctx);
m_commit_position_ctx = NULL;
ctx = schedule_laggy_clients_disconnect(ctx);
librados::AioCompletion *comp =
librados::Rados::aio_create_completion(ctx, NULL,
utils::rados_ctx_callback);
int r = m_ioctx.aio_operate(m_oid, comp, &op);
assert(r == 0);
comp->release();
m_commit_position_task_ctx = NULL;
}
void JournalMetadata::schedule_watch_reset() {
assert(m_timer_lock->is_locked());
m_timer->add_event_after(1, new C_WatchReset(this));
}
void JournalMetadata::handle_watch_reset() {
assert(m_timer_lock->is_locked());
if (!m_initialized) {
return;
}
int r = m_ioctx.watch2(m_oid, &m_watch_handle, &m_watch_ctx);
if (r < 0) {
if (r == -ENOENT) {
ldout(m_cct, 5) << __func__ << ": journal header not found" << dendl;
} else {
lderr(m_cct) << __func__ << ": failed to watch journal: "
<< cpp_strerror(r) << dendl;
}
schedule_watch_reset();
} else {
ldout(m_cct, 10) << __func__ << ": reset journal watch" << dendl;
refresh(NULL);
}
}
void JournalMetadata::handle_watch_notify(uint64_t notify_id, uint64_t cookie) {
ldout(m_cct, 10) << "journal header updated" << dendl;
bufferlist bl;
m_ioctx.notify_ack(m_oid, notify_id, cookie, bl);
refresh(NULL);
}
void JournalMetadata::handle_watch_error(int err) {
if (err == -ENOTCONN) {
ldout(m_cct, 5) << "journal watch error: header removed" << dendl;
} else {
lderr(m_cct) << "journal watch error: " << cpp_strerror(err) << dendl;
}
Mutex::Locker timer_locker(*m_timer_lock);
Mutex::Locker locker(m_lock);
// release old watch on error
if (m_watch_handle != 0) {
m_ioctx.unwatch2(m_watch_handle);
m_watch_handle = 0;
}
if (m_initialized && err != -ENOENT) {
schedule_watch_reset();
}
}
uint64_t JournalMetadata::allocate_commit_tid(uint64_t object_num,
uint64_t tag_tid,
uint64_t entry_tid) {
Mutex::Locker locker(m_lock);
uint64_t commit_tid = ++m_commit_tid;
m_pending_commit_tids[commit_tid] = CommitEntry(object_num, tag_tid,
entry_tid);
ldout(m_cct, 20) << "allocated commit tid: commit_tid=" << commit_tid << " ["
<< "object_num=" << object_num << ", "
<< "tag_tid=" << tag_tid << ", "
<< "entry_tid=" << entry_tid << "]"
<< dendl;
return commit_tid;
}
void JournalMetadata::overflow_commit_tid(uint64_t commit_tid,
uint64_t object_num) {
Mutex::Locker locker(m_lock);
auto it = m_pending_commit_tids.find(commit_tid);
assert(it != m_pending_commit_tids.end());
assert(it->second.object_num < object_num);
ldout(m_cct, 20) << __func__ << ": "
<< "commit_tid=" << commit_tid << ", "
<< "old_object_num=" << it->second.object_num << ", "
<< "new_object_num=" << object_num << dendl;
it->second.object_num = object_num;
}
void JournalMetadata::get_commit_entry(uint64_t commit_tid,
uint64_t *object_num,
uint64_t *tag_tid, uint64_t *entry_tid) {
Mutex::Locker locker(m_lock);
auto it = m_pending_commit_tids.find(commit_tid);
assert(it != m_pending_commit_tids.end());
*object_num = it->second.object_num;
*tag_tid = it->second.tag_tid;
*entry_tid = it->second.entry_tid;
}
void JournalMetadata::committed(uint64_t commit_tid,
const CreateContext &create_context) {
ldout(m_cct, 20) << "committed tid=" << commit_tid << dendl;
ObjectSetPosition commit_position;
Context *stale_ctx = nullptr;
{
Mutex::Locker timer_locker(*m_timer_lock);
Mutex::Locker locker(m_lock);
assert(commit_tid > m_commit_position_tid);
if (!m_commit_position.object_positions.empty()) {
// in-flight commit position update
commit_position = m_commit_position;
} else {
// safe commit position
commit_position = m_client.commit_position;
}
CommitTids::iterator it = m_pending_commit_tids.find(commit_tid);
assert(it != m_pending_commit_tids.end());
CommitEntry &commit_entry = it->second;
commit_entry.committed = true;
bool update_commit_position = false;
while (!m_pending_commit_tids.empty()) {
CommitTids::iterator it = m_pending_commit_tids.begin();
CommitEntry &commit_entry = it->second;
if (!commit_entry.committed) {
break;
}
commit_position.object_positions.emplace_front(
commit_entry.object_num, commit_entry.tag_tid,
commit_entry.entry_tid);
m_pending_commit_tids.erase(it);
update_commit_position = true;
}
if (!update_commit_position) {
return;
}
// prune the position to have one position per splay offset
std::set<uint8_t> in_use_splay_offsets;
ObjectPositions::iterator ob_it = commit_position.object_positions.begin();
while (ob_it != commit_position.object_positions.end()) {
uint8_t splay_offset = ob_it->object_number % m_splay_width;
if (!in_use_splay_offsets.insert(splay_offset).second) {
ob_it = commit_position.object_positions.erase(ob_it);
} else {
++ob_it;
}
}
stale_ctx = m_commit_position_ctx;
m_commit_position_ctx = create_context();
m_commit_position = commit_position;
m_commit_position_tid = commit_tid;
ldout(m_cct, 20) << "updated commit position: " << commit_position << ", "
<< "on_safe=" << m_commit_position_ctx << dendl;
schedule_commit_task();
}