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AsyncMessenger.cc
685 lines (593 loc) · 18.8 KB
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AsyncMessenger.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2014 UnitedStack <haomai@unitedstack.com>
*
* Author: Haomai Wang <haomaiwang@gmail.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "acconfig.h"
#include <iostream>
#include <fstream>
#include "AsyncMessenger.h"
#include "common/config.h"
#include "common/Timer.h"
#include "common/errno.h"
#define dout_subsys ceph_subsys_ms
#undef dout_prefix
#define dout_prefix _prefix(_dout, this)
static ostream& _prefix(std::ostream *_dout, AsyncMessenger *m) {
return *_dout << "-- " << m->get_myaddr() << " ";
}
static ostream& _prefix(std::ostream *_dout, Processor *p) {
return *_dout << " Processor -- ";
}
/*******************
* Processor
*/
class Processor::C_processor_accept : public EventCallback {
Processor *pro;
public:
explicit C_processor_accept(Processor *p): pro(p) {}
void do_request(int id) {
pro->accept();
}
};
Processor::Processor(AsyncMessenger *r, Worker *w, CephContext *c, uint64_t n)
: msgr(r), net(c), worker(w), nonce(n),
listen_handler(new C_processor_accept(this)) {}
int Processor::bind(const entity_addr_t &bind_addr, const set<int>& avoid_ports)
{
const md_config_t *conf = msgr->cct->_conf;
// bind to a socket
ldout(msgr->cct, 10) << __func__ << dendl;
int family;
switch (bind_addr.get_family()) {
case AF_INET:
case AF_INET6:
family = bind_addr.get_family();
break;
default:
// bind_addr is empty
family = conf->ms_bind_ipv6 ? AF_INET6 : AF_INET;
}
SocketOptions opts;
opts.nodelay = msgr->cct->_conf->ms_tcp_nodelay;
opts.rcbuf_size = msgr->cct->_conf->ms_tcp_rcvbuf;
// use whatever user specified (if anything)
entity_addr_t listen_addr = bind_addr;
listen_addr.set_family(family);
/* bind to port */
int r = -1;
for (int i = 0; i < conf->ms_bind_retry_count; i++) {
if (i > 0) {
lderr(msgr->cct) << __func__ << " was unable to bind. Trying again in "
<< conf->ms_bind_retry_delay << " seconds " << dendl;
sleep(conf->ms_bind_retry_delay);
}
if (listen_addr.get_port()) {
worker->center.submit_to(worker->center.get_id(), [this, &listen_addr, &opts, &r]() {
r = worker->listen(listen_addr, opts, &listen_socket);
}, false);
if (r < 0) {
lderr(msgr->cct) << __func__ << " unable to bind to " << listen_addr
<< ": " << cpp_strerror(r) << dendl;
continue;
}
} else {
// try a range of ports
for (int port = msgr->cct->_conf->ms_bind_port_min; port <= msgr->cct->_conf->ms_bind_port_max; port++) {
if (avoid_ports.count(port))
continue;
listen_addr.set_port(port);
worker->center.submit_to(worker->center.get_id(), [this, &listen_addr, &opts, &r]() {
r = worker->listen(listen_addr, opts, &listen_socket);
}, false);
if (r == 0)
break;
}
if (r < 0) {
lderr(msgr->cct) << __func__ << " unable to bind to " << listen_addr
<< " on any port in range " << msgr->cct->_conf->ms_bind_port_min
<< "-" << msgr->cct->_conf->ms_bind_port_max << ": "
<< cpp_strerror(r) << dendl;
listen_addr.set_port(0); // Clear port before retry, otherwise we shall fail again.
continue;
}
ldout(msgr->cct, 10) << __func__ << " bound on random port " << listen_addr << dendl;
}
if (r == 0)
break;
}
// It seems that binding completely failed, return with that exit status
if (r < 0) {
lderr(msgr->cct) << __func__ << " was unable to bind after " << conf->ms_bind_retry_count
<< " attempts: " << cpp_strerror(r) << dendl;
return r;
}
ldout(msgr->cct, 10) << __func__ << " bound to " << listen_addr << dendl;
msgr->set_myaddr(bind_addr);
if (bind_addr != entity_addr_t())
msgr->learned_addr(bind_addr);
if (msgr->get_myaddr().get_port() == 0) {
msgr->set_myaddr(listen_addr);
}
entity_addr_t addr = msgr->get_myaddr();
addr.nonce = nonce;
msgr->set_myaddr(addr);
msgr->init_local_connection();
ldout(msgr->cct,1) << __func__ << " bind my_inst.addr is " << msgr->get_myaddr() << dendl;
return 0;
}
int Processor::rebind(const set<int>& avoid_ports)
{
ldout(msgr->cct, 1) << __func__ << " rebind avoid " << avoid_ports << dendl;
entity_addr_t addr = msgr->get_myaddr();
set<int> new_avoid = avoid_ports;
new_avoid.insert(addr.get_port());
addr.set_port(0);
// adjust the nonce; we want our entity_addr_t to be truly unique.
nonce += 1000000;
msgr->my_inst.addr.nonce = nonce;
ldout(msgr->cct, 10) << __func__ << " new nonce " << nonce << " and inst " << msgr->my_inst << dendl;
ldout(msgr->cct, 10) << __func__ << " will try " << addr << " and avoid ports " << new_avoid << dendl;
return bind(addr, new_avoid);
}
void Processor::start()
{
ldout(msgr->cct, 1) << __func__ << dendl;
// start thread
if (listen_socket) {
worker->center.submit_to(worker->center.get_id(), [this]() {
worker->center.create_file_event(listen_socket.fd(), EVENT_READABLE, listen_handler); }, false);
}
}
void Processor::accept()
{
ldout(msgr->cct, 10) << __func__ << " listen_fd=" << listen_socket.fd() << dendl;
SocketOptions opts;
opts.nodelay = msgr->cct->_conf->ms_tcp_nodelay;
opts.rcbuf_size = msgr->cct->_conf->ms_tcp_rcvbuf;
opts.priority = msgr->get_socket_priority();
while (true) {
entity_addr_t addr;
ConnectedSocket cli_socket;
int r = listen_socket.accept(&cli_socket, opts, &addr);
if (r == 0) {
ldout(msgr->cct, 10) << __func__ << " accepted incoming on sd " << cli_socket.fd() << dendl;
msgr->add_accept(worker, std::move(cli_socket), addr);
continue;
} else {
if (r == -EINTR) {
continue;
} else if (r == -EAGAIN) {
break;
} else if (r == -EMFILE || r == -ENFILE) {
lderr(msgr->cct) << __func__ << " open file descriptions limit reached sd = " << listen_socket.fd()
<< " errno " << r << " " << cpp_strerror(r) << dendl;
break;
} else if (r == -ECONNABORTED) {
ldout(msgr->cct, 0) << __func__ << " it was closed because of rst arrived sd = " << listen_socket.fd()
<< " errno " << r << " " << cpp_strerror(r) << dendl;
continue;
} else {
lderr(msgr->cct) << __func__ << " no incoming connection?"
<< " errno " << r << " " << cpp_strerror(r) << dendl;
break;
}
}
}
}
void Processor::stop()
{
ldout(msgr->cct,10) << __func__ << dendl;
if (listen_socket) {
worker->center.submit_to(worker->center.get_id(), [this]() {
worker->center.delete_file_event(listen_socket.fd(), EVENT_READABLE);
listen_socket.abort_accept();
}, false);
}
}
struct StackSingleton {
std::shared_ptr<NetworkStack> stack;
StackSingleton(CephContext *c) {
stack = NetworkStack::create(c, c->_conf->ms_async_transport_type);
}
~StackSingleton() {
stack->stop();
}
};
class C_handle_reap : public EventCallback {
AsyncMessenger *msgr;
public:
explicit C_handle_reap(AsyncMessenger *m): msgr(m) {}
void do_request(int id) {
// judge whether is a time event
msgr->reap_dead();
}
};
/*******************
* AsyncMessenger
*/
AsyncMessenger::AsyncMessenger(CephContext *cct, entity_name_t name,
string mname, uint64_t _nonce, uint64_t features)
: SimplePolicyMessenger(cct, name,mname, _nonce),
dispatch_queue(cct, this, mname),
lock("AsyncMessenger::lock"),
nonce(_nonce), need_addr(true), did_bind(false),
global_seq(0), deleted_lock("AsyncMessenger::deleted_lock"),
cluster_protocol(0), stopped(true)
{
ceph_spin_init(&global_seq_lock);
StackSingleton *single;
cct->lookup_or_create_singleton_object<StackSingleton>(single, "AsyncMessenger::NetworkStack");
stack = single->stack.get();
stack->start();
local_worker = stack->get_worker();
local_connection = new AsyncConnection(cct, this, &dispatch_queue, local_worker);
local_features = features;
init_local_connection();
reap_handler = new C_handle_reap(this);
unsigned processor_num = 1;
if (stack->support_local_listen_table())
processor_num = stack->get_num_worker();
for (unsigned i = 0; i < processor_num; ++i)
processors.push_back(new Processor(this, stack->get_worker(i), cct, _nonce));
}
/**
* Destroy the AsyncMessenger. Pretty simple since all the work is done
* elsewhere.
*/
AsyncMessenger::~AsyncMessenger()
{
delete reap_handler;
assert(!did_bind); // either we didn't bind or we shut down the Processor
local_connection->mark_down();
for (auto &&p : processors)
delete p;
}
void AsyncMessenger::ready()
{
ldout(cct,10) << __func__ << " " << get_myaddr() << dendl;
stack->start();
Mutex::Locker l(lock);
for (auto &&p : processors)
p->start();
dispatch_queue.start();
}
int AsyncMessenger::shutdown()
{
ldout(cct,10) << __func__ << " " << get_myaddr() << dendl;
// done! clean up.
for (auto &&p : processors)
p->stop();
mark_down_all();
// break ref cycles on the loopback connection
local_connection->set_priv(NULL);
did_bind = false;
lock.Lock();
stop_cond.Signal();
stopped = true;
lock.Unlock();
stack->drain();
return 0;
}
int AsyncMessenger::bind(const entity_addr_t &bind_addr)
{
lock.Lock();
if (started) {
ldout(cct,10) << __func__ << " already started" << dendl;
lock.Unlock();
return -1;
}
ldout(cct,10) << __func__ << " bind " << bind_addr << dendl;
lock.Unlock();
// bind to a socket
set<int> avoid_ports;
int r = 0;
unsigned i = 0;
for (auto &&p : processors) {
r = p->bind(bind_addr, avoid_ports);
if (r < 0) {
// Note: this is related to local tcp listen table problem.
// Posix(default kernel implementation) backend shares listen table
// in the kernel, so all threads can use the same listen table naturally
// and only one thread need to bind. But other backends(like dpdk) uses local
// listen table, we need to bind/listen tcp port for each worker. So if the
// first worker failed to bind, it could be think the normal error then handle
// it, like port is used case. But if the first worker successfully to bind
// but the second worker failed, it's not expected and we need to assert
// here
assert(i == 0);
break;
}
++i;
}
if (r >= 0)
did_bind = true;
return r;
}
int AsyncMessenger::rebind(const set<int>& avoid_ports)
{
ldout(cct,1) << __func__ << " rebind avoid " << avoid_ports << dendl;
assert(did_bind);
for (auto &&p : processors)
p->stop();
mark_down_all();
unsigned i = 0;
int r = 0;
for (auto &&p : processors) {
r = p->rebind(avoid_ports);
if (r == 0) {
p->start();
} else {
assert(i == 0);
break;
}
i++;
}
return r;
}
int AsyncMessenger::start()
{
lock.Lock();
ldout(cct,1) << __func__ << " start" << dendl;
// register at least one entity, first!
assert(my_inst.name.type() >= 0);
assert(!started);
started = true;
stopped = false;
if (!did_bind) {
my_inst.addr.nonce = nonce;
_init_local_connection();
}
lock.Unlock();
return 0;
}
void AsyncMessenger::wait()
{
lock.Lock();
if (!started) {
lock.Unlock();
return;
}
if (!stopped)
stop_cond.Wait(lock);
lock.Unlock();
dispatch_queue.shutdown();
if (dispatch_queue.is_started()) {
ldout(cct, 10) << __func__ << ": waiting for dispatch queue" << dendl;
dispatch_queue.wait();
dispatch_queue.discard_local();
ldout(cct, 10) << __func__ << ": dispatch queue is stopped" << dendl;
}
// close all connections
shutdown_connections(false);
stack->drain();
ldout(cct, 10) << __func__ << ": done." << dendl;
ldout(cct, 1) << __func__ << " complete." << dendl;
started = false;
}
AsyncConnectionRef AsyncMessenger::add_accept(Worker *w, ConnectedSocket cli_socket, entity_addr_t &addr)
{
lock.Lock();
if (!stack->support_local_listen_table())
w = stack->get_worker();
AsyncConnectionRef conn = new AsyncConnection(cct, this, &dispatch_queue, w);
conn->accept(std::move(cli_socket), addr);
accepting_conns.insert(conn);
lock.Unlock();
return conn;
}
AsyncConnectionRef AsyncMessenger::create_connect(const entity_addr_t& addr, int type)
{
assert(lock.is_locked());
assert(addr != my_inst.addr);
ldout(cct, 10) << __func__ << " " << addr
<< ", creating connection and registering" << dendl;
// create connection
Worker *w = stack->get_worker();
AsyncConnectionRef conn = new AsyncConnection(cct, this, &dispatch_queue, w);
conn->connect(addr, type);
assert(!conns.count(addr));
conns[addr] = conn;
w->get_perf_counter()->inc(l_msgr_active_connections);
return conn;
}
ConnectionRef AsyncMessenger::get_connection(const entity_inst_t& dest)
{
Mutex::Locker l(lock);
if (my_inst.addr == dest.addr) {
// local
return local_connection;
}
AsyncConnectionRef conn = _lookup_conn(dest.addr);
if (conn) {
ldout(cct, 10) << __func__ << " " << dest << " existing " << conn << dendl;
} else {
conn = create_connect(dest.addr, dest.name.type());
ldout(cct, 10) << __func__ << " " << dest << " new " << conn << dendl;
}
return conn;
}
ConnectionRef AsyncMessenger::get_loopback_connection()
{
return local_connection;
}
int AsyncMessenger::_send_message(Message *m, const entity_inst_t& dest)
{
ldout(cct, 1) << __func__ << "--> " << dest.name << " "
<< dest.addr << " -- " << *m << " -- ?+"
<< m->get_data().length() << " " << m << dendl;
if (dest.addr == entity_addr_t()) {
ldout(cct,0) << __func__ << " message " << *m
<< " with empty dest " << dest.addr << dendl;
m->put();
return -EINVAL;
}
AsyncConnectionRef conn = _lookup_conn(dest.addr);
submit_message(m, conn, dest.addr, dest.name.type());
return 0;
}
void AsyncMessenger::submit_message(Message *m, AsyncConnectionRef con,
const entity_addr_t& dest_addr, int dest_type)
{
if (cct->_conf->ms_dump_on_send) {
m->encode(-1, MSG_CRC_ALL);
ldout(cct, 0) << __func__ << "submit_message " << *m << "\n";
m->get_payload().hexdump(*_dout);
if (m->get_data().length() > 0) {
*_dout << " data:\n";
m->get_data().hexdump(*_dout);
}
*_dout << dendl;
m->clear_payload();
}
// existing connection?
if (con) {
con->send_message(m);
return ;
}
// local?
if (my_inst.addr == dest_addr) {
// local
local_connection->send_message(m);
return ;
}
// remote, no existing connection.
const Policy& policy = get_policy(dest_type);
if (policy.server) {
ldout(cct, 20) << __func__ << " " << *m << " remote, " << dest_addr
<< ", lossy server for target type "
<< ceph_entity_type_name(dest_type) << ", no session, dropping." << dendl;
m->put();
} else {
ldout(cct,20) << __func__ << " " << *m << " remote, " << dest_addr << ", new connection." << dendl;
con = create_connect(dest_addr, dest_type);
con->send_message(m);
}
}
/**
* If my_inst.addr doesn't have an IP set, this function
* will fill it in from the passed addr. Otherwise it does nothing and returns.
*/
void AsyncMessenger::set_addr_unknowns(const entity_addr_t &addr)
{
Mutex::Locker l(lock);
if (my_inst.addr.is_blank_ip()) {
int port = my_inst.addr.get_port();
my_inst.addr.u = addr.u;
my_inst.addr.set_port(port);
_init_local_connection();
}
}
int AsyncMessenger::send_keepalive(Connection *con)
{
con->send_keepalive();
return 0;
}
void AsyncMessenger::shutdown_connections(bool queue_reset)
{
ldout(cct,1) << __func__ << " " << dendl;
lock.Lock();
for (set<AsyncConnectionRef>::iterator q = accepting_conns.begin();
q != accepting_conns.end(); ++q) {
AsyncConnectionRef p = *q;
ldout(cct, 5) << __func__ << " accepting_conn " << p.get() << dendl;
p->stop(queue_reset);
}
accepting_conns.clear();
while (!conns.empty()) {
ceph::unordered_map<entity_addr_t, AsyncConnectionRef>::iterator it = conns.begin();
AsyncConnectionRef p = it->second;
ldout(cct, 5) << __func__ << " mark down " << it->first << " " << p << dendl;
conns.erase(it);
p->get_perf_counter()->dec(l_msgr_active_connections);
p->stop(queue_reset);
}
{
Mutex::Locker l(deleted_lock);
while (!deleted_conns.empty()) {
set<AsyncConnectionRef>::iterator it = deleted_conns.begin();
AsyncConnectionRef p = *it;
ldout(cct, 5) << __func__ << " delete " << p << dendl;
deleted_conns.erase(it);
}
}
lock.Unlock();
}
void AsyncMessenger::mark_down(const entity_addr_t& addr)
{
lock.Lock();
AsyncConnectionRef p = _lookup_conn(addr);
if (p) {
ldout(cct, 1) << __func__ << " " << addr << " -- " << p << dendl;
p->stop(true);
} else {
ldout(cct, 1) << __func__ << " " << addr << " -- connection dne" << dendl;
}
lock.Unlock();
}
int AsyncMessenger::get_proto_version(int peer_type, bool connect) const
{
int my_type = my_inst.name.type();
// set reply protocol version
if (peer_type == my_type) {
// internal
return cluster_protocol;
} else {
// public
switch (connect ? peer_type : my_type) {
case CEPH_ENTITY_TYPE_OSD: return CEPH_OSDC_PROTOCOL;
case CEPH_ENTITY_TYPE_MDS: return CEPH_MDSC_PROTOCOL;
case CEPH_ENTITY_TYPE_MON: return CEPH_MONC_PROTOCOL;
}
}
return 0;
}
void AsyncMessenger::learned_addr(const entity_addr_t &peer_addr_for_me)
{
// be careful here: multiple threads may block here, and readers of
// my_inst.addr do NOT hold any lock.
// this always goes from true -> false under the protection of the
// mutex. if it is already false, we need not retake the mutex at
// all.
if (!need_addr)
return ;
lock.Lock();
if (need_addr) {
need_addr = false;
entity_addr_t t = peer_addr_for_me;
t.set_port(my_inst.addr.get_port());
my_inst.addr.u = t.u;
ldout(cct, 1) << __func__ << " learned my addr " << my_inst.addr << dendl;
_init_local_connection();
}
lock.Unlock();
}
int AsyncMessenger::reap_dead()
{
ldout(cct, 1) << __func__ << " start" << dendl;
int num = 0;
Mutex::Locker l1(lock);
Mutex::Locker l2(deleted_lock);
while (!deleted_conns.empty()) {
auto it = deleted_conns.begin();
AsyncConnectionRef p = *it;
ldout(cct, 5) << __func__ << " delete " << p << dendl;
auto conns_it = conns.find(p->peer_addr);
if (conns_it != conns.end() && conns_it->second == p)
conns.erase(conns_it);
accepting_conns.erase(p);
deleted_conns.erase(it);
++num;
}
return num;
}