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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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70
src/client_state.cpp
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@@ -299,10 +299,16 @@ 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,
const wsrep::const_buffer& buffer,
int flags)
int wsrep::client_state::enter_toi_local(const wsrep::key_array& keys,
const wsrep::const_buffer& buffer,
int flags)
{
assert(state_ == s_exec);
assert(mode_ == m_local);
@@ -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])
{