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codership/wsrep-lib#104 Error voting support

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- populate and pass real error description buffer to provider in case
   of applying error
 - return 0 from server_state::on_apply() if error voting confirmed
   consistency
 - remove fragments and rollback after fragment applying failure
 - always release streaming applier on commit or rollback
This commit is contained in:
Alexey Yurchenko
2019-04-30 19:00:48 +03:00
parent fd66bdef0b
commit 0f676bd893
22 changed files with 470 additions and 187 deletions
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22
dbsim/db_high_priority_service.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -47,7 +47,8 @@ int db::high_priority_service::adopt_transaction(const wsrep::transaction&)
int db::high_priority_service::apply_write_set(
const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::const_buffer&,
wsrep::mutable_buffer&)
{
client_.se_trx_.start(&client_);
client_.se_trx_.apply(client_.client_state().transaction());
@ -56,7 +57,8 @@ int db::high_priority_service::apply_write_set(
int db::high_priority_service::apply_toi(
const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::const_buffer&,
wsrep::mutable_buffer&)
{
throw wsrep::not_implemented_error();
}
@ -84,6 +86,11 @@ int db::high_priority_service::rollback(const wsrep::ws_handle& ws_handle,
return ret;
}
void db::high_priority_service::adopt_apply_error(wsrep::mutable_buffer& err)
{
client_.client_state_.adopt_apply_error(err);
}
void db::high_priority_service::after_apply()
{
client_.client_state_.after_applying();
@ -91,17 +98,22 @@ void db::high_priority_service::after_apply()
int db::high_priority_service::log_dummy_write_set(
const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
const wsrep::ws_meta& ws_meta,
wsrep::mutable_buffer& err)
{
int ret(client_.client_state_.start_transaction(ws_handle, ws_meta));
assert(ret == 0);
if (ws_meta.ordered())
{
client_.client_state_.adopt_apply_error(err);
client_.client_state_.prepare_for_ordering(ws_handle, ws_meta, true);
ret = client_.client_state_.before_commit();
assert(ret == 0);
ret = client_.client_state_.ordered_commit();
assert(ret == ret);
assert(ret == 0);
ret = client_.client_state_.after_commit();
assert(ret == 0);
}
client_.client_state_.after_applying();
return ret;
}

14
dbsim/db_high_priority_service.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -35,7 +35,8 @@ namespace db
const wsrep::transaction& transaction() const override;
int adopt_transaction(const wsrep::transaction&) override;
int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&) override;
const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
int append_fragment_and_commit(
const wsrep::ws_handle&,
const wsrep::ws_meta&, const wsrep::const_buffer&)
@ -45,14 +46,17 @@ namespace db
{ return 0; }
int commit(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int rollback(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&) override;
int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
void adopt_apply_error(wsrep::mutable_buffer&) override;
virtual void after_apply() override;
void store_globals() override { }
void reset_globals() override { }
void switch_execution_context(wsrep::high_priority_service&) override
{ }
int log_dummy_write_set(const wsrep::ws_handle&,
const wsrep::ws_meta&) override;
const wsrep::ws_meta&,
wsrep::mutable_buffer&) override;
virtual bool is_replaying() const override;
void debug_crash(const char*) override { }
private:
@ -71,7 +75,7 @@ namespace db
// After apply is empty for replayer to keep the transaction
// context available for the client session after replaying
// is over.
void after_apply() override { }
void after_apply() override {}
bool is_replaying() const override { return true; }
};

41
include/wsrep/buffer.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -38,13 +38,22 @@ namespace wsrep
, size_(size)
{ }
const_buffer(const const_buffer& b)
: ptr_(b.ptr())
, size_(b.size())
{ }
const void* ptr() const { return ptr_; }
const void* data() const { return ptr_; }
const char* data() const { return static_cast<const char*>(ptr_); }
size_t size() const { return size_; }
const_buffer& operator=(const const_buffer& b)
{
ptr_ = b.ptr();
size_ = b.size();
return *this;
}
private:
// const_buffer(const const_buffer&);
// const_buffer& operator=(const const_buffer&);
const void* ptr_;
size_t size_;
};
@ -57,16 +66,36 @@ namespace wsrep
: buffer_()
{ }
void resize(size_t s) { buffer_.resize(s); }
void clear()
{
// using swap to ensure deallocation
std::vector<char>().swap(buffer_);
}
void push_back(const char* begin, const char* end)
{
buffer_.insert(buffer_.end(), begin, end);
}
const char* data() const { return &buffer_[0]; }
template <class C> void push_back(const C& c)
{
std::copy(c.begin(), c.end(), std::back_inserter(buffer_));
}
size_t size() const { return buffer_.size(); }
char* data() { return &buffer_[0]; }
const char* data() const { return &buffer_[0]; }
mutable_buffer& operator= (const mutable_buffer& other)
{
buffer_ = other.buffer_;
return *this;
}
private:
std::vector<char> buffer_;
};
}
#endif // WSREP_BUFFER_HPP

4
include/wsrep/client_id.hpp
View File

@ -41,6 +41,10 @@ namespace wsrep
{
return (id_ < other.id_);
}
bool operator==(const client_id& other) const
{
return (id_ == other.id_);
}
private:
type id_;
};

37
include/wsrep/client_state.hpp
View File

@ -90,6 +90,8 @@ namespace wsrep
*/
enum mode
{
/** undefined mode */
m_undefined,
/** Locally operating client session. */
m_local,
/** High priority mode */
@ -247,6 +249,8 @@ namespace wsrep
/**
* Perform cleanup after applying a transaction.
*
* @param err Applying error (empty for no error)
*/
void after_applying()
{
@ -508,6 +512,15 @@ namespace wsrep
transaction_.adopt(transaction);
}
/**
* Adopt (store) transaction applying error for further processing.
*/
void adopt_apply_error(wsrep::mutable_buffer& err)
{
assert(mode_ == m_high_priority);
transaction_.adopt_apply_error(err);
}
/**
* Clone enough state from another transaction so that replaing will
* be possible with a transaction contained in this client state.
@ -546,15 +559,15 @@ namespace wsrep
*
* @return Zero on success, non-zero otherwise.
*/
int enter_toi(const wsrep::key_array& key_array,
int enter_toi_local(const wsrep::key_array& key_array,
const wsrep::const_buffer& buffer,
int flags);
/**
* Enter applying total order critical section.
* Enter applier TOI mode
*
* @param ws_meta Write set meta data
*/
int enter_toi(const wsrep::ws_meta& ws_meta);
void enter_toi_mode(const wsrep::ws_meta& ws_meta);
/**
* Return true if the client_state is under TOI operation.
@ -573,10 +586,20 @@ namespace wsrep
{
return toi_mode_;
}
/**
* Leave total order isolation critical section.
* (for local mode clients)
*
* @param err definition of the error that happened during the
* execution of TOI operation (empty for no error)
*/
int leave_toi();
int leave_toi_local(const wsrep::mutable_buffer& err);
/**
* Leave applier TOI mode.
*/
void leave_toi_mode();
/**
* Begin rolling schema upgrade operation.
@ -770,7 +793,7 @@ namespace wsrep
, client_service_(client_service)
, id_(id)
, mode_(mode)
, toi_mode_()
, toi_mode_(m_undefined)
, state_(s_none)
, state_hist_()
, transaction_(*this)
@ -804,6 +827,9 @@ namespace wsrep
enum wsrep::provider::status status =
wsrep::provider::success);
void enter_toi_common();
void leave_toi_common();
wsrep::thread::id owning_thread_id_;
wsrep::thread::id current_thread_id_;
bool has_rollbacker_;
@ -864,6 +890,7 @@ namespace wsrep
{
switch (mode)
{
case wsrep::client_state::m_undefined: return "undefined";
case wsrep::client_state::m_local: return "local";
case wsrep::client_state::m_high_priority: return "high priority";
case wsrep::client_state::m_toi: return "toi";

7
include/wsrep/gtid.hpp
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@ -48,6 +48,13 @@ namespace wsrep
{
return undefined_;
}
bool operator==(const gtid& other) const
{
return (
seqno_ == other.seqno_ &&
id_ == other.id_
);
}
private:
static const wsrep::gtid undefined_;
wsrep::id id_;

28
include/wsrep/high_priority_service.hpp
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@ -70,9 +70,13 @@ namespace wsrep
* new transaction before applying a write set and must
* either commit to make changes persistent or roll back.
*
* @params ws_meta Write set meta data
* @params ws Write set buffer
* @params err Buffer to store error data
*/
virtual int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&) = 0;
virtual int apply_write_set(const wsrep::ws_meta& ws_meta,
const wsrep::const_buffer& ws,
wsrep::mutable_buffer& err) = 0;
/**
* Append a fragment into fragment storage. This will be
@ -141,9 +145,14 @@ namespace wsrep
*
* TOI operation is a standalone operation and should not
* be executed as a part of a transaction.
*
* @params ws_meta Write set meta data
* @params ws Write set buffer
* @params err Buffer to store error data
*/
virtual int apply_toi(const wsrep::ws_meta&,
const wsrep::const_buffer&) = 0;
virtual int apply_toi(const wsrep::ws_meta& ws_meta,
const wsrep::const_buffer& ws,
wsrep::mutable_buffer& err) = 0;
/**
* Actions to take after applying a write set was completed.
@ -175,11 +184,19 @@ namespace wsrep
*
* @params ws_handle Write set handle
* @params ws_meta Write set meta data
* @params err Optional applying error data buffer, may be modified
*
* @return Zero in case of success, non-zero on failure
*/
virtual int log_dummy_write_set(const ws_handle& ws_handle,
const ws_meta& ws_meta) = 0;
const ws_meta& ws_meta,
wsrep::mutable_buffer& err) = 0;
/**
* Adopt (store) apply error description for further reporting
* to provider, source buffer may be modified.
*/
virtual void adopt_apply_error(wsrep::mutable_buffer& err) = 0;
virtual bool is_replaying() const = 0;
@ -189,6 +206,7 @@ namespace wsrep
* Debug facility to crash the server at given point.
*/
virtual void debug_crash(const char* crash_point) = 0;
protected:
wsrep::server_state& server_state_;
bool must_exit_;

33
include/wsrep/provider.hpp
View File

@ -56,6 +56,14 @@ namespace wsrep
wsrep::transaction_id transaction_id() const
{ return transaction_id_; }
wsrep::client_id client_id() const { return client_id_; }
bool operator==(const stid& other) const
{
return (
server_id_ == other.server_id_ &&
transaction_id_ == other.transaction_id_ &&
client_id_ == other.client_id_
);
}
private:
wsrep::id server_id_;
wsrep::transaction_id transaction_id_;
@ -84,6 +92,13 @@ namespace wsrep
void* opaque() const { return opaque_; }
bool operator==(const ws_handle& other) const
{
return (
transaction_id_ == other.transaction_id_ &&
opaque_ == other.opaque_
);
}
private:
wsrep::transaction_id transaction_id_;
void* opaque_;
@ -134,9 +149,21 @@ namespace wsrep
return stid_.transaction_id();
}
bool ordered() const { return !gtid_.is_undefined(); }
wsrep::seqno depends_on() const { return depends_on_; }
int flags() const { return flags_; }
bool operator==(const ws_meta& other) const
{
return (
gtid_ == other.gtid_ &&
stid_ == other.stid_ &&
depends_on_ == other.depends_on_ &&
flags_ == other.flags_
);
}
private:
wsrep::gtid gtid_;
wsrep::stid stid_;
@ -300,7 +327,8 @@ namespace wsrep
virtual enum status commit_order_enter(const wsrep::ws_handle&,
const wsrep::ws_meta&) = 0;
virtual int commit_order_leave(const wsrep::ws_handle&,
const wsrep::ws_meta&) = 0;
const wsrep::ws_meta&,
const wsrep::mutable_buffer& err) = 0;
virtual int release(wsrep::ws_handle&) = 0;
/**
@ -325,7 +353,8 @@ namespace wsrep
/**
* Leave total order isolation critical section
*/
virtual enum status leave_toi(wsrep::client_id) = 0;
virtual enum status leave_toi(wsrep::client_id,
const wsrep::mutable_buffer& err) = 0;
/**
* Perform a causal read on cluster.

9
include/wsrep/transaction.hpp
View File

@ -27,6 +27,7 @@
#include "streaming_context.hpp"
#include "lock.hpp"
#include "sr_key_set.hpp"
#include "buffer.hpp"
#include <cassert>
#include <vector>
@ -198,6 +199,12 @@ namespace wsrep
{ return streaming_context_; }
wsrep::streaming_context& streaming_context()
{ return streaming_context_; }
void adopt_apply_error(wsrep::mutable_buffer& buf)
{
apply_error_buf_ = std::move(buf);
}
const wsrep::mutable_buffer& apply_error() const
{ return apply_error_buf_; }
private:
transaction(const transaction&);
transaction operator=(const transaction&);
@ -214,6 +221,7 @@ namespace wsrep
int certify_fragment(wsrep::unique_lock<wsrep::mutex>&);
int certify_commit(wsrep::unique_lock<wsrep::mutex>&);
int append_sr_keys_for_commit();
int release_commit_order(wsrep::unique_lock<wsrep::mutex>&);
void streaming_rollback(wsrep::unique_lock<wsrep::mutex>&);
void clear_fragments();
void cleanup();
@ -240,6 +248,7 @@ namespace wsrep
size_t fragments_certified_for_statement_;
wsrep::streaming_context streaming_context_;
wsrep::sr_key_set sr_keys_;
wsrep::mutable_buffer apply_error_buf_;
};
static inline const char* to_c_string(enum wsrep::transaction::state state)

66
src/client_state.cpp
View File

@ -299,8 +299,14 @@ void wsrep::client_state::disable_streaming()
// TOI //
//////////////////////////////////////////////////////////////////////////////
void wsrep::client_state::enter_toi_common()
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
toi_mode_ = mode_;
mode(lock, m_toi);
}
int wsrep::client_state::enter_toi(const wsrep::key_array& keys,
int wsrep::client_state::enter_toi_local(const wsrep::key_array& keys,
const wsrep::const_buffer& buffer,
int flags)
{
@ -311,9 +317,7 @@ int wsrep::client_state::enter_toi(const wsrep::key_array& keys,
{
case wsrep::provider::success:
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
toi_mode_ = mode_;
mode(lock, m_toi);
enter_toi_common();
ret = 0;
break;
}
@ -326,43 +330,37 @@ int wsrep::client_state::enter_toi(const wsrep::key_array& keys,
return ret;
}
int wsrep::client_state::enter_toi(const wsrep::ws_meta& ws_meta)
void wsrep::client_state::enter_toi_mode(const wsrep::ws_meta& ws_meta)
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
assert(mode_ == m_high_priority);
toi_mode_ = mode_;
mode(lock, m_toi);
enter_toi_common();
toi_meta_ = ws_meta;
return 0;
}
int wsrep::client_state::leave_toi()
void wsrep::client_state::leave_toi_common()
{
int ret(0);
if (toi_mode_ == m_local)
{
switch (provider().leave_toi(id_))
{
case wsrep::provider::success:
break;
default:
assert(0);
override_error(wsrep::e_error_during_commit,
wsrep::provider::error_unknown);
ret = 1;
break;
}
}
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
mode(lock, toi_mode_);
toi_mode_ = m_local;
toi_mode_ = m_undefined;
if (toi_meta_.gtid().is_undefined() == false)
{
update_last_written_gtid(toi_meta_.gtid());
}
toi_meta_ = wsrep::ws_meta();
}
return ret;
int wsrep::client_state::leave_toi_local(const wsrep::mutable_buffer& err)
{
assert(toi_mode_ == m_local);
leave_toi_common();
return (provider().leave_toi(id_, err) == provider::success ? 0 : 1);
}
void wsrep::client_state::leave_toi_mode()
{
assert(toi_mode_ == m_high_priority);
leave_toi_common();
}
///////////////////////////////////////////////////////////////////////////////
@ -449,7 +447,7 @@ void wsrep::client_state::update_last_written_gtid(const wsrep::gtid& gtid)
{
assert(last_written_gtid_.is_undefined() ||
(last_written_gtid_.id() == gtid.id() &&
last_written_gtid_.seqno() < gtid.seqno()));
!(last_written_gtid_.seqno() > gtid.seqno())));
last_written_gtid_ = gtid;
}
@ -513,12 +511,14 @@ void wsrep::client_state::mode(
enum mode mode)
{
assert(lock.owns_lock());
static const char allowed[n_modes_][n_modes_] =
{ /* l h t r */
{ 0, 1, 1, 1 }, /* local */
{ 1, 0, 1, 0 }, /* high prio */
{ 1, 1, 0, 0 }, /* toi */
{ 1, 0, 0, 0 } /* rsu */
{ /* u l h t r */
{ 0, 0, 0, 0, 0 }, /* undefined */
{ 0, 0, 1, 1, 1 }, /* local */
{ 0, 1, 0, 1, 0 }, /* high prio */
{ 0, 1, 1, 0, 0 }, /* toi */
{ 0, 1, 0, 0, 0 } /* rsu */
};
if (!allowed[mode_][mode])
{

211
src/server_state.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -60,25 +60,86 @@ static void log_adopt_error(const wsrep::transaction& transaction)
<< "which may need to be removed manually.";
}
static int apply_fragment(wsrep::high_priority_service& high_priority_service,
wsrep::high_priority_service& streaming_applier,
// resolve which of the two errors return to caller
static inline int resolve_return_error(bool const vote,
int const vote_err,
int const apply_err)
{
if (vote) return vote_err;
return vote_err != 0 ? vote_err : apply_err;
}
static void
discard_streaming_applier(wsrep::server_state& server_state,
wsrep::high_priority_service* streaming_applier,
const wsrep::ws_meta& ws_meta)
{
server_state.stop_streaming_applier(
ws_meta.server_id(), ws_meta.transaction_id());
server_state.server_service().release_high_priority_service(
streaming_applier);
}
static int apply_fragment(wsrep::server_state& server_state,
wsrep::high_priority_service& high_priority_service,
wsrep::high_priority_service* streaming_applier,
const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta,
const wsrep::const_buffer& data)
{
int ret;
int ret(0);
int apply_err;
wsrep::mutable_buffer err;
{
wsrep::high_priority_switch sw(high_priority_service,
streaming_applier);
ret = streaming_applier.apply_write_set(ws_meta, data);
streaming_applier.after_apply();
*streaming_applier);
apply_err = streaming_applier->apply_write_set(ws_meta, data, err);
if (!apply_err)
{
assert(err.size() == 0);
streaming_applier->after_apply();
}
else
{
bool const remove_fragments(streaming_applier->transaction(
).streaming_context().fragments().size() > 0);
ret = streaming_applier->rollback(ws_handle, ws_meta);
ret = ret || (streaming_applier->after_apply(), 0);
if (remove_fragments)
{
ret = ret || streaming_applier->start_transaction(ws_handle,
ws_meta);
ret = ret || (streaming_applier->adopt_apply_error(err), 0);
ret = ret || streaming_applier->remove_fragments(ws_meta);
ret = ret || streaming_applier->commit(ws_handle, ws_meta);
ret = ret || (streaming_applier->after_apply(), 0);
}
else
{
ret = streaming_applier->log_dummy_write_set(ws_handle,
ws_meta, err);
}
}
}
if (!ret)
{
if (!apply_err)
{
high_priority_service.debug_crash("crash_apply_cb_before_append_frag");
ret = ret || high_priority_service.append_fragment_and_commit(
ret = high_priority_service.append_fragment_and_commit(
ws_handle, ws_meta, data);
high_priority_service.debug_crash("crash_apply_cb_after_append_frag");
high_priority_service.after_apply();
ret = ret || (high_priority_service.after_apply(), 0);
}
else
{
discard_streaming_applier(server_state, streaming_applier,ws_meta);
ret = resolve_return_error(err.size() > 0, ret, apply_err);
}
}
return ret;
}
@ -90,13 +151,27 @@ static int commit_fragment(wsrep::server_state& server_state,
const wsrep::ws_meta& ws_meta,
const wsrep::const_buffer& data)
{
int ret;
// Make high priority switch to go out of scope
// before the streaming applier is released.
int ret(0);
{
wsrep::high_priority_switch sw(
high_priority_service, *streaming_applier);
ret = streaming_applier->apply_write_set(ws_meta, data);
wsrep::mutable_buffer err;
int const apply_err(
streaming_applier->apply_write_set(ws_meta, data, err));
if (apply_err)
{
assert(streaming_applier->transaction(
).streaming_context().fragments().size() > 0);
ret = streaming_applier->rollback(ws_handle, ws_meta);
ret = ret || (streaming_applier->after_apply(), 0);
ret = ret || streaming_applier->start_transaction(
ws_handle, ws_meta);
ret = ret || (streaming_applier->adopt_apply_error(err),0);
}
else
{
assert(err.size() == 0);
}
streaming_applier->debug_crash(
"crash_apply_cb_before_fragment_removal");
ret = ret || streaming_applier->remove_fragments(ws_meta);
@ -107,15 +182,15 @@ static int commit_fragment(wsrep::server_state& server_state,
ret = ret || streaming_applier->commit(ws_handle, ws_meta);
streaming_applier->debug_crash(
"crash_commit_cb_last_fragment_commit_success");
streaming_applier->after_apply();
ret = ret || (streaming_applier->after_apply(), 0);
ret = resolve_return_error(err.size() > 0, ret, apply_err);
}
if (ret == 0)
if (!ret)
{
server_state.stop_streaming_applier(
ws_meta.server_id(), ws_meta.transaction_id());
server_state.server_service().release_high_priority_service(
streaming_applier);
discard_streaming_applier(server_state, streaming_applier, ws_meta);
}
return ret;
}
@ -129,6 +204,7 @@ static int rollback_fragment(wsrep::server_state& server_state,
// Adopts transaction state and starts a transaction for
// high priority service
int adopt_error;
bool remove_fragments(false);
if ((adopt_error = high_priority_service.adopt_transaction(
streaming_applier->transaction())))
{
@ -137,25 +213,41 @@ static int rollback_fragment(wsrep::server_state& server_state,
// Even if the adopt above fails we roll back the streaming transaction.
// Adopt failure will leave stale entries in streaming log which can
// be removed manually.
wsrep::const_buffer no_error;
{
wsrep::high_priority_switch ws(
high_priority_service, *streaming_applier);
// Streaming applier rolls back out of order. Fragment
// removal grabs commit order below.
streaming_applier->rollback(wsrep::ws_handle(), wsrep::ws_meta());
streaming_applier->after_apply();
remove_fragments = streaming_applier->transaction().
streaming_context().fragments().size() > 0;
ret = streaming_applier->rollback(wsrep::ws_handle(), wsrep::ws_meta());
ret = ret || (streaming_applier->after_apply(), 0);
}
server_state.stop_streaming_applier(
ws_meta.server_id(), ws_meta.transaction_id());
server_state.server_service().release_high_priority_service(
streaming_applier);
if (!ret)
{
discard_streaming_applier(server_state, streaming_applier, ws_meta);
if (adopt_error == 0)
{
high_priority_service.remove_fragments(ws_meta);
high_priority_service.commit(ws_handle, ws_meta);
if (remove_fragments)
{
ret = high_priority_service.remove_fragments(ws_meta);
ret = ret || high_priority_service.commit(ws_handle, ws_meta);
ret = ret || (high_priority_service.after_apply(), 0);
}
else
{
if (ws_meta.ordered())
{
wsrep::mutable_buffer no_error;
ret = high_priority_service.log_dummy_write_set(
ws_handle, ws_meta, no_error);
}
}
}
}
high_priority_service.after_apply();
return ret;
}
@ -166,14 +258,14 @@ static int apply_write_set(wsrep::server_state& server_state,
const wsrep::const_buffer& data)
{
int ret(0);
// wsrep::log_info() << "apply_write_set: " << ws_meta;
if (wsrep::rolls_back_transaction(ws_meta.flags()))
{
wsrep::mutable_buffer no_error;
if (wsrep::starts_transaction(ws_meta.flags()))
{
// No transaction existed before, log a dummy write set
ret = high_priority_service.log_dummy_write_set(
ws_handle, ws_meta);
ws_handle, ws_meta, no_error);
}
else
{
@ -196,7 +288,7 @@ static int apply_write_set(wsrep::server_state& server_state,
<< ws_meta.server_id()
<< ": " << ws_meta.transaction_id());
ret = high_priority_service.log_dummy_write_set(
ws_handle, ws_meta);
ws_handle, ws_meta, no_error);
}
else
{
@ -212,14 +304,27 @@ static int apply_write_set(wsrep::server_state& server_state,
else if (wsrep::starts_transaction(ws_meta.flags()) &&
wsrep::commits_transaction(ws_meta.flags()))
{
ret = high_priority_service.start_transaction(ws_handle, ws_meta) ||
high_priority_service.apply_write_set(ws_meta, data) ||
high_priority_service.commit(ws_handle, ws_meta);
if (ret)
ret = high_priority_service.start_transaction(ws_handle, ws_meta);
if (!ret)
{
high_priority_service.rollback(ws_handle, ws_meta);
wsrep::mutable_buffer err;
int const apply_err(high_priority_service.apply_write_set(
ws_meta, data, err));
if (!apply_err)
{
assert(err.size() == 0);
ret = high_priority_service.commit(ws_handle, ws_meta);
ret = ret || (high_priority_service.after_apply(), 0);
}
else
{
ret = high_priority_service.rollback(ws_handle, ws_meta);
ret = ret || (high_priority_service.after_apply(), 0);
ret = ret || high_priority_service.log_dummy_write_set(
ws_handle, ws_meta, err);
ret = resolve_return_error(err.size() > 0, ret, apply_err);
}
}
high_priority_service.after_apply();
}
else if (wsrep::starts_transaction(ws_meta.flags()))
{
@ -231,8 +336,9 @@ static int apply_write_set(wsrep::server_state& server_state,
server_state.start_streaming_applier(
ws_meta.server_id(), ws_meta.transaction_id(), sa);
sa->start_transaction(ws_handle, ws_meta);
ret = apply_fragment(high_priority_service,
*sa,
ret = apply_fragment(server_state,
high_priority_service,
sa,
ws_handle,
ws_meta,
data);
@ -252,13 +358,15 @@ static int apply_write_set(wsrep::server_state& server_state,
wsrep::log_warning() << "Could not find applier context for "
<< ws_meta.server_id()
<< ": " << ws_meta.transaction_id();
wsrep::mutable_buffer no_error;
ret = high_priority_service.log_dummy_write_set(
ws_handle, ws_meta);
ws_handle, ws_meta, no_error);
}
else
{
ret = apply_fragment(high_priority_service,
*sa,
ret = apply_fragment(server_state,
high_priority_service,
sa,
ws_handle,
ws_meta,
data);
@ -268,9 +376,10 @@ static int apply_write_set(wsrep::server_state& server_state,
{
if (high_priority_service.is_replaying())
{
wsrep::mutable_buffer unused;
ret = high_priority_service.start_transaction(
ws_handle, ws_meta) ||
high_priority_service.apply_write_set(ws_meta, data) ||
high_priority_service.apply_write_set(ws_meta, data, unused) ||
high_priority_service.commit(ws_handle, ws_meta);
}
else
@ -289,8 +398,9 @@ static int apply_write_set(wsrep::server_state& server_state,
<< "Could not find applier context for "
<< ws_meta.server_id()
<< ": " << ws_meta.transaction_id();
wsrep::mutable_buffer no_error;
ret = high_priority_service.log_dummy_write_set(
ws_handle, ws_meta);
ws_handle, ws_meta, no_error);
}
else
{
@ -327,14 +437,11 @@ static int apply_toi(wsrep::provider& provider,
//
// Regular TOI.
//
// Note that we ignore error returned by apply_toi
// call here. This must be revised after the error
// voting is added.
//
provider.commit_order_enter(ws_handle, ws_meta);
(void)high_priority_service.apply_toi(ws_meta, data);
provider.commit_order_leave(ws_handle, ws_meta);
return 0;
wsrep::mutable_buffer err;
int const apply_err(high_priority_service.apply_toi(ws_meta,data,err));
int const vote_err(provider.commit_order_leave(ws_handle, ws_meta,err));
return resolve_return_error(err.size() > 0, vote_err, apply_err);
}
else if (wsrep::starts_transaction(ws_meta.flags()))
{

42
src/transaction.cpp
View File

@ -107,6 +107,7 @@ wsrep::transaction::transaction(
, fragments_certified_for_statement_()
, streaming_context_()
, sr_keys_()
, apply_error_buf_()
{ }
@ -469,7 +470,8 @@ int wsrep::transaction::ordered_commit()
assert(state() == s_committing);
assert(ordered());
client_service_.debug_sync("wsrep_before_commit_order_leave");
int ret(provider().commit_order_leave(ws_handle_, ws_meta_));
int ret(provider().commit_order_leave(ws_handle_, ws_meta_,
apply_error_buf_));
client_service_.debug_sync("wsrep_after_commit_order_leave");
// Should always succeed:
// 1) If before commit before succeeds, the transaction handle
@ -670,6 +672,16 @@ int wsrep::transaction::after_rollback()
return 0;
}
int wsrep::transaction::release_commit_order(
wsrep::unique_lock<wsrep::mutex>& lock)
{
lock.unlock();
int ret(provider().commit_order_enter(ws_handle_, ws_meta_));
lock.lock();
return ret || provider().commit_order_leave(ws_handle_, ws_meta_,
apply_error_buf_);
}
int wsrep::transaction::after_statement()
{
int ret(0);
@ -767,13 +779,7 @@ int wsrep::transaction::after_statement()
{
if (ordered())
{
lock.unlock();
ret = provider().commit_order_enter(ws_handle_, ws_meta_);
lock.lock();
if (ret == 0)
{
provider().commit_order_leave(ws_handle_, ws_meta_);
}
ret = release_commit_order(lock);
}
provider().release(ws_handle_);
}
@ -795,25 +801,6 @@ void wsrep::transaction::after_applying()
assert(state_ == s_executing ||
state_ == s_committed ||
state_ == s_aborted);
// We may enter here from either high priority applier or
// from fragment storage service. High priority applier
// should always have set up meta data for ordering, but
// fragment storage service operation may be rolled back
// before the fragment is ordered and certified.
// Therefore we need to check separately if the ordering has
// been done.
if (state_ == s_aborted && ordered())
{
lock.unlock();
int ret(provider().commit_order_enter(ws_handle_, ws_meta_));
lock.lock();
if (ret == 0)
{
provider().commit_order_leave(ws_handle_, ws_meta_);
}
}
if (state_ != s_executing)
{
cleanup();
@ -1581,6 +1568,7 @@ void wsrep::transaction::cleanup()
sr_keys_.clear();
streaming_context_.cleanup();
client_service_.cleanup_transaction();
apply_error_buf_.clear();
debug_log_state("cleanup_leave");
}

17
src/wsrep_provider_v26.cpp
View File

@ -788,13 +788,18 @@ wsrep::wsrep_provider_v26::commit_order_enter(
wsrep_->commit_order_enter(wsrep_, cwsh.native(), cwsm.native()));
}
int wsrep::wsrep_provider_v26::commit_order_leave(
int
wsrep::wsrep_provider_v26::commit_order_leave(
const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
const wsrep::ws_meta& ws_meta,
const wsrep::mutable_buffer& err)
{
const_ws_handle cwsh(ws_handle);
const_ws_meta cwsm(ws_meta);
return (wsrep_->commit_order_leave(wsrep_, cwsh.native(), cwsm.native(), 0) != WSREP_OK);
wsrep_buf_t const err_buf = { err.data(), err.size() };
int ret(wsrep_->commit_order_leave(
wsrep_, cwsh.native(), cwsm.native(), &err_buf) != WSREP_OK);
return ret;
}
int wsrep::wsrep_provider_v26::release(wsrep::ws_handle& ws_handle)
@ -851,10 +856,12 @@ wsrep::wsrep_provider_v26::enter_toi(
}
enum wsrep::provider::status
wsrep::wsrep_provider_v26::leave_toi(wsrep::client_id client_id)
wsrep::wsrep_provider_v26::leave_toi(wsrep::client_id client_id,
const wsrep::mutable_buffer& err)
{
const wsrep_buf_t err_buf = { err.data(), err.size() };
return map_return_value(wsrep_->to_execute_end(
wsrep_, client_id.get(), 0));
wsrep_, client_id.get(), &err_buf));
}
std::pair<wsrep::gtid, enum wsrep::provider::status>

6
src/wsrep_provider_v26.hpp
View File

@ -64,7 +64,8 @@ namespace wsrep
commit_order_enter(const wsrep::ws_handle&,
const wsrep::ws_meta&);
int commit_order_leave(const wsrep::ws_handle&,
const wsrep::ws_meta&);
const wsrep::ws_meta&,
const wsrep::mutable_buffer&);
int release(wsrep::ws_handle&);
enum wsrep::provider::status replay(const wsrep::ws_handle&,
wsrep::high_priority_service*);
@ -73,7 +74,8 @@ namespace wsrep
const wsrep::const_buffer&,
wsrep::ws_meta&,
int);
enum wsrep::provider::status leave_toi(wsrep::client_id);
enum wsrep::provider::status leave_toi(wsrep::client_id,
const wsrep::mutable_buffer&);
std::pair<wsrep::gtid, enum wsrep::provider::status>
causal_read(int) const;
enum wsrep::provider::status wait_for_gtid(const wsrep::gtid&, int) const;

38
test/mock_high_priority_service.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -19,6 +19,7 @@
#include "mock_high_priority_service.hpp"
#include "mock_server_state.hpp"
#include <sstream>
int wsrep::mock_high_priority_service::start_transaction(
const wsrep::ws_handle& ws_handle, const wsrep::ws_meta& ws_meta)
@ -34,13 +35,25 @@ int wsrep::mock_high_priority_service::adopt_transaction(
}
int wsrep::mock_high_priority_service::apply_write_set(
const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::ws_meta& meta,
const wsrep::const_buffer&,
wsrep::mutable_buffer& err)
{
assert(client_state_->toi_meta().seqno().is_undefined());
assert(client_state_->transaction().state() == wsrep::transaction::s_executing ||
client_state_->transaction().state() == wsrep::transaction::s_replaying);
return (fail_next_applying_ ? 1 : 0);
if (fail_next_applying_)
{
std::ostringstream os;
os << "failed " << meta;
err.push_back(os.str());
assert(err.size() > 0);
return 1;
}
else
{
return 0;
};
}
int wsrep::mock_high_priority_service::commit(
@ -69,14 +82,29 @@ int wsrep::mock_high_priority_service::rollback(
}
int wsrep::mock_high_priority_service::apply_toi(const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::const_buffer&,
wsrep::mutable_buffer&)
{
assert(client_state_->transaction().active() == false);
assert(client_state_->toi_meta().seqno().is_undefined() == false);
return (fail_next_toi_ ? 1 : 0);
}
void wsrep::mock_high_priority_service::adopt_apply_error(
wsrep::mutable_buffer& err)
{
client_state_->adopt_apply_error(err);
}
void wsrep::mock_high_priority_service::after_apply()
{
client_state_->after_applying();
}
int wsrep::mock_high_priority_service::log_dummy_write_set(
const wsrep::ws_handle&,
const wsrep::ws_meta&,
wsrep::mutable_buffer& err)
{
return err.size() > 0;
}

17
test/mock_high_priority_service.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -47,7 +47,8 @@ namespace wsrep
{ return client_state_->transaction(); }
int adopt_transaction(const wsrep::transaction&) WSREP_OVERRIDE;
int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&) WSREP_OVERRIDE;
const wsrep::const_buffer&,
wsrep::mutable_buffer&) WSREP_OVERRIDE;
int append_fragment_and_commit(
const wsrep::ws_handle&,
const wsrep::ws_meta&,
@ -59,21 +60,23 @@ namespace wsrep
WSREP_OVERRIDE;
int rollback(const wsrep::ws_handle&, const wsrep::ws_meta&) WSREP_OVERRIDE;
int apply_toi(const wsrep::ws_meta&,
const wsrep::const_buffer&) WSREP_OVERRIDE;
const wsrep::const_buffer&,
wsrep::mutable_buffer&) WSREP_OVERRIDE;
void adopt_apply_error(wsrep::mutable_buffer& err) WSREP_OVERRIDE;
void after_apply() WSREP_OVERRIDE;
void store_globals() WSREP_OVERRIDE { }
void reset_globals() WSREP_OVERRIDE { }
void switch_execution_context(wsrep::high_priority_service&)
WSREP_OVERRIDE { }
int log_dummy_write_set(const wsrep::ws_handle&,
const wsrep::ws_meta&)
WSREP_OVERRIDE { return 0; }
const wsrep::ws_meta&,
wsrep::mutable_buffer&) WSREP_OVERRIDE;
bool is_replaying() const WSREP_OVERRIDE { return replaying_; }
void debug_crash(const char*) WSREP_OVERRIDE { /* Not in unit tests*/}
wsrep::mock_client_state* client_state()
wsrep::client_state& client_state()
{
return client_state_;
return *client_state_;
}
bool do_2pc_;
bool fail_next_applying_;

15
test/mock_provider.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -172,12 +172,15 @@ namespace wsrep
}
int commit_order_leave(const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
const wsrep::ws_meta& ws_meta,
const wsrep::mutable_buffer& err)
WSREP_OVERRIDE
{
BOOST_REQUIRE(ws_handle.opaque());
BOOST_REQUIRE(ws_meta.seqno().is_undefined() == false);
return commit_order_leave_result_;
return err.size() > 0 ?
wsrep::provider::error_fatal :
commit_order_leave_result_;
}
int release(wsrep::ws_handle& )
@ -195,7 +198,8 @@ namespace wsrep
wsrep::mock_high_priority_service& high_priority_service(
*static_cast<wsrep::mock_high_priority_service*>(hps));
wsrep::mock_client_state& cc(
*high_priority_service.client_state());
static_cast<wsrep::mock_client_state&>(
high_priority_service.client_state()));
wsrep::high_priority_context high_priority_context(cc);
const wsrep::transaction& tc(cc.transaction());
wsrep::ws_meta ws_meta;
@ -238,7 +242,8 @@ namespace wsrep
int)
WSREP_OVERRIDE
{ return wsrep::provider::success; }
enum wsrep::provider::status leave_toi(wsrep::client_id)
enum wsrep::provider::status leave_toi(wsrep::client_id,
const wsrep::mutable_buffer&)
WSREP_OVERRIDE
{ return wsrep::provider::success; }

4
test/mock_server_state.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -102,7 +102,7 @@ namespace wsrep
{
mock_high_priority_service* mhps(
static_cast<mock_high_priority_service*>(high_priority_service));
wsrep::mock_client* cs(static_cast<wsrep::mock_client*>(
wsrep::mock_client* cs(&static_cast<wsrep::mock_client&>(
mhps->client_state()));
cs->after_command_before_result();
cs->after_command_after_result();

2
test/mock_storage_service.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*

6
test/server_context_test.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -239,6 +239,8 @@ BOOST_FIXTURE_TEST_CASE(server_state_applying_2pc,
BOOST_FIXTURE_TEST_CASE(server_state_applying_1pc_rollback,
applying_server_fixture)
{
/* make sure default success result is flipped to error_fatal */
ss.provider().commit_order_leave_result_ = wsrep::provider::success;
hps.fail_next_applying_ = true;
char buf[1] = { 1 };
BOOST_REQUIRE(ss.on_apply(hps, ws_handle, ws_meta,
@ -252,6 +254,8 @@ BOOST_FIXTURE_TEST_CASE(server_state_applying_1pc_rollback,
BOOST_FIXTURE_TEST_CASE(server_state_applying_2pc_rollback,
applying_server_fixture)
{
/* make sure default success result is flipped to error_fatal */
ss.provider().commit_order_leave_result_ = wsrep::provider::success;
hps.do_2pc_ = true;
hps.fail_next_applying_ = true;
char buf[1] = { 1 };

2
test/transaction_test.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*

2
test/transaction_test_2pc.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*