void copy_remote_files_impl(
::dsn::rpc_address remote,
const std::string& source_dir,
const std::vector<std::string>& files, // empty for all
const std::string& dest_dir,
bool overwrite,
dsn_task_t native_task
)
{
if (files.empty())
{
dsn_file_copy_remote_directory(remote.c_addr(), source_dir.c_str(), dest_dir.c_str(),
overwrite, native_task);
}
else
{
const char** ptr = (const char**)alloca(sizeof(const char*) * (files.size() + 1));
const char** ptr_base = ptr;
for (auto& f : files)
{
*ptr++ = f.c_str();
}
*ptr = nullptr;
dsn_file_copy_remote_files(
remote.c_addr(), source_dir.c_str(), ptr_base,
dest_dir.c_str(), overwrite, native_task
);
}
}
void replica::send_prepare_message(::dsn::rpc_address addr, partition_status status, mutation_ptr& mu, int timeout_milliseconds)
{
dsn_message_t msg = dsn_msg_create_request(RPC_PREPARE, timeout_milliseconds, gpid_to_hash(get_gpid()));
replica_configuration rconfig;
_primary_states.get_replica_config(status, rconfig);
{
rpc_write_stream writer(msg);
marshall(writer, get_gpid());
marshall(writer, rconfig);
mu->write_to(writer);
}
mu->remote_tasks()[addr] = rpc::call(addr, msg,
this,
std::bind(&replica::on_prepare_reply,
this,
std::make_pair(mu, rconfig.status),
std::placeholders::_1,
std::placeholders::_2,
std::placeholders::_3),
gpid_to_hash(get_gpid())
);
ddebug(
"%s: mutation %s send_prepare_message to %s as %s",
name(), mu->name(),
addr.to_string(),
enum_to_string(rconfig.status)
);
}
//ERR_OBJECT_NOT_FOUND not in cache.
//ERR_IO_PENDING in cache but invalid, remove from cache.
//ERR_OK in cache and valid
error_code replication_app_client_base::get_address(int pidx, bool is_write, /*out*/ dsn::rpc_address& addr, read_semantic_t semantic)
{
partition_configuration config;
{
zauto_read_lock l(_config_lock);
auto it = _config_cache.find(pidx);
if(it != _config_cache.end())
{
config = it->second;
addr = get_address(is_write, semantic, config);
if (addr.is_invalid())
{
return ERR_IO_PENDING;
}
else
{
return ERR_OK;
}
}
else
{
return ERR_OBJECT_NOT_FOUND;
}
}
}
void replica::send_prepare_message(
::dsn::rpc_address addr,
partition_status status,
mutation_ptr& mu,
int timeout_milliseconds,
int64_t learn_signature)
{
dsn_message_t msg = dsn_msg_create_request(RPC_PREPARE, timeout_milliseconds, gpid_to_hash(get_gpid()));
replica_configuration rconfig;
_primary_states.get_replica_config(status, rconfig, learn_signature);
{
rpc_write_stream writer(msg);
marshall(writer, get_gpid());
marshall(writer, rconfig);
mu->write_to(writer);
}
mu->remote_tasks()[addr] = rpc::call(addr, msg,
this,
[=](error_code err, dsn_message_t request, dsn_message_t reply)
{
on_prepare_reply(std::make_pair(mu, rconfig.status), err, request, reply);
},
gpid_to_hash(get_gpid())
);
ddebug(
"%s: mutation %s send_prepare_message to %s as %s",
name(), mu->name(),
addr.to_string(),
enum_to_string(rconfig.status)
);
}
virtual void send_beacon(::dsn::rpc_address node, uint64_t time) override
{
if (_send_ping_switch)
failure_detector::send_beacon(node, time);
else {
dinfo("ignore send beacon, to node[%s], time[%" PRId64 "]", node.to_string(), time);
}
}
void replication_app_client_base::call_with_address(dsn::rpc_address addr, request_context_ptr request)
{
auto& msg = request->request;
dbg_dassert(!addr.is_invalid(), "");
dbg_dassert(_app_id > 0, "");
if (request->header_pos != 0)
{
if (request->is_read)
{
request->read_header.gpid.app_id = _app_id;
request->read_header.gpid.pidx = request->partition_index;
blob buffer(request->header_pos, 0, sizeof(request->read_header));
binary_writer writer(buffer);
marshall(writer, request->read_header);
dsn_msg_options_t opts;
opts.timeout_ms = request->timeout_ms;
opts.thread_hash = gpid_to_hash(request->read_header.gpid);
opts.vnid = *(uint64_t*)(&request->read_header.gpid);
dsn_msg_set_options(request->request, &opts, DSN_MSGM_HASH | DSN_MSGM_TIMEOUT); // TODO: not supported yet DSN_MSGM_VNID);
}
else
{
request->write_header.gpid.app_id = _app_id;
request->write_header.gpid.pidx = request->partition_index;
blob buffer(request->header_pos, 0, sizeof(request->write_header));
binary_writer writer(buffer);
marshall(writer, request->write_header);
dsn_msg_options_t opts;
opts.timeout_ms = request->timeout_ms;
opts.thread_hash = gpid_to_hash(request->write_header.gpid);
opts.vnid = *(uint64_t*)(&request->write_header.gpid);
dsn_msg_set_options(request->request, &opts, DSN_MSGM_HASH | DSN_MSGM_TIMEOUT); // TODO: not supported yet DSN_MSGM_VNID | DSN_MSGM_CONTEXT);
}
request->header_pos = 0;
}
{
zauto_lock l(request->lock);
rpc::call(
addr,
msg,
this,
std::bind(
&replication_app_client_base::replica_rw_reply,
this,
std::placeholders::_1,
std::placeholders::_2,
std::placeholders::_3,
request
)
);
}
}
bool failure_detector::unregister_master(::dsn::rpc_address node)
{
zauto_lock l(_lock);
auto it = _masters.find(node);
if (it != _masters.end())
{
it->second.send_beacon_timer->cancel(true);
_masters.erase(it);
dinfo("unregister master[%s] successfully", node.to_string());
return true;
}
else
{
ddebug("unregister master[%s] failed, cannot find it in FD", node.to_string());
return false;
}
}
void failure_detector::register_worker( ::dsn::rpc_address target, bool is_connected)
{
uint64_t now = now_ms();
/*
* callers should use the fd::_lock necessarily
*/
worker_record record(target, now);
record.is_alive = is_connected ? true : false;
auto ret = _workers.insert(std::make_pair(target, record));
if ( ret.second )
{
dinfo("register worker[%s] successfully", target.to_string());
}
else
{
dinfo("worker[%s] already registered", target.to_string());
}
}
void replication_failure_detector::on_master_connected(::dsn::rpc_address node)
{
bool is_primary = false;
{
zauto_lock l(_meta_lock);
is_primary = dsn_group_is_leader(_meta_servers.group_handle(), node.c_addr());
}
if (is_primary)
{
_stub->on_meta_server_connected();
}
}
void failure_detector::register_master(::dsn::rpc_address target)
{
bool setup_timer = false;
uint64_t now = now_ms();
zauto_lock l(_lock);
master_record record(target, now);
auto ret = _masters.insert(std::make_pair(target, record));
if (ret.second)
{
dinfo("register master[%s] successfully", target.to_string());
setup_timer = true;
}
else
{
// active the beacon again in case previously local node is not in target's allow list
if (ret.first->second.rejected)
{
ret.first->second.rejected = false;
setup_timer = true;
}
dinfo("master[%s] already registered", target.to_string());
}
if (setup_timer)
{
ret.first->second.send_beacon_timer = tasking::enqueue_timer(LPC_BEACON_SEND, this,
[this, target]()
{
this->send_beacon(target, now_ms());
},
std::chrono::milliseconds(_beacon_interval_milliseconds)
);
}
}
::dsn::rpc_address replication_failure_detector::find_next_meta_server(::dsn::rpc_address current)
{
if (current.is_invalid())
return _meta_servers[random32(0, 100) % _meta_servers.size()];
else
{
auto it = std::find(_meta_servers.begin(), _meta_servers.end(), current);
dassert (it != _meta_servers.end(), "");
it++;
if (it != _meta_servers.end())
return *it;
else
return _meta_servers.at(0);
}
}
void replica::upgrade_to_secondary_on_primary(::dsn::rpc_address node)
{
ddebug(
"%s: upgrade potential secondary %s to secondary",
name(),
node.to_string()
);
partition_configuration newConfig = _primary_states.membership;
// add secondary
newConfig.secondaries.push_back(node);
update_configuration_on_meta_server(CT_UPGRADE_TO_SECONDARY, node, newConfig);
}
void server_state::remove_meta_node(const ::dsn::rpc_address& node)
{
zauto_write_lock l(_meta_lock);
int i = -1;
for (auto it = _meta_servers.begin(); it != _meta_servers.end(); it++)
{
i++;
if (*it == node)
{
_meta_servers.erase(it);
if (_meta_servers.size() == 0)
_leader_index = -1;
else if (i == _leader_index)
{
_leader_index = dsn_random32(0, (uint32_t)_meta_servers.size() - 1);
}
return;
}
}
dassert (false, "cannot find node '%s:%hu' in server state", node.name(), node.port());
}
void meta_server_failure_detector::on_worker_connected(::dsn::rpc_address node)
{
if (!is_primary())
{
return;
}
node_states states;
states.push_back(std::make_pair(node, true));
dwarn("Client reconnected",
"Client %s", node.to_string());
_state->set_node_state(states, nullptr);
}
void replica::handle_remote_failure(partition_status st, ::dsn::rpc_address node, error_code error)
{
derror(
"%s: handle remote failure error %s, status = %s, node = %s",
name(),
error.to_string(),
enum_to_string(st),
node.to_string()
);
error.end_tracking();
dassert (status() == PS_PRIMARY, "");
dassert (node != _stub->_primary_address, "");
switch (st)
{
case PS_SECONDARY:
dassert (_primary_states.check_exist(node, PS_SECONDARY), "");
{
configuration_update_request request;
request.node = node;
request.type = CT_DOWNGRADE_TO_INACTIVE;
request.config = _primary_states.membership;
downgrade_to_inactive_on_primary(request);
}
break;
case PS_POTENTIAL_SECONDARY:
// potential secondary failure does not lead to ballot change
// therefore, it is possible to have multiple exec here
_primary_states.learners.erase(node);
_primary_states.statuses.erase(node);
break;
case PS_INACTIVE:
case PS_ERROR:
break;
default:
dassert (false, "");
break;
}
}
bool failure_detector::unregister_worker(::dsn::rpc_address node)
{
/*
* callers should use the fd::_lock necessarily
*/
bool ret;
size_t count = _workers.erase(node);
if ( count == 0 )
{
ret = false;
}
else
{
ret = true;
}
dinfo("unregister worker[%s] successfully, removed entry count is %u",
node.to_string(), (uint32_t)count);
return ret;
}
bool failure_detector::switch_master(::dsn::rpc_address from, ::dsn::rpc_address to, uint32_t delay_milliseconds)
{
/* the caller of switch master shoud lock necessarily to protect _masters */
auto it = _masters.find(from);
auto it2 = _masters.find(to);
if (it != _masters.end())
{
if (it2 != _masters.end())
{
dwarn("switch master failed as both are already registered, from[%s], to[%s]",
from.to_string(), to.to_string());
return false;
}
it->second.node = to;
it->second.rejected = false;
it->second.send_beacon_timer->cancel(true);
it->second.send_beacon_timer = tasking::enqueue_timer(LPC_BEACON_SEND, this,
[this, to]()
{
this->send_beacon(to, now_ms());
},
std::chrono::milliseconds(_beacon_interval_milliseconds),
0,
std::chrono::milliseconds(delay_milliseconds)
);
_masters.insert(std::make_pair(to, it->second));
_masters.erase(from);
dinfo("switch master successfully, from[%s], to[%s]",
from.to_string(), to.to_string());
}
else
{
dwarn("switch master failed as from node is not registered yet, from[%s], to[%s]",
from.to_string(), to.to_string());
return false;
}
return true;
}
static void destroy_group(::dsn::rpc_address group) {
dsn_group_destroy(group.group_handle());
}
void failure_detector::report(::dsn::rpc_address node, bool is_master, bool is_connected)
{
ddebug("%s[%s] %sconnected", is_master ? "master":"worker", node.to_string(), is_connected ? "" : "dis");
}
void send_message(const dsn::rpc_address &target, dsn::message_ex *request)
{
ddebug("send request to %s", target.to_string());
request->add_ref();
request->release_ref();
}
