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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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include "net_handler.h"
#include "common/debug.h"
#include "common/errno.h"
#include "include/compat.h"
#include "include/sock_compat.h"
#define dout_subsys ceph_subsys_ms
#undef dout_prefix
#define dout_prefix *_dout << "NetHandler "
namespace ceph{
int NetHandler::create_socket(int domain, bool reuse_addr)
{
int s;
int r = 0;
if ((s = socket_cloexec(domain, SOCK_STREAM, 0)) == -1) {
r = errno;
lderr(cct) << __func__ << " couldn't create socket " << cpp_strerror(r) << dendl;
return -r;
}
#if !defined(__FreeBSD__)
/* Make sure connection-intensive things like the benchmark
* will be able to close/open sockets a zillion of times */
if (reuse_addr) {
int on = 1;
if (::setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
r = errno;
lderr(cct) << __func__ << " setsockopt SO_REUSEADDR failed: "
<< strerror(r) << dendl;
close(s);
return -r;
}
}
#endif
return s;
}
int NetHandler::set_nonblock(int sd)
{
int flags;
int r = 0;
/* Set the socket nonblocking.
* Note that fcntl(2) for F_GETFL and F_SETFL can't be
* interrupted by a signal. */
if ((flags = fcntl(sd, F_GETFL)) < 0 ) {
r = errno;
lderr(cct) << __func__ << " fcntl(F_GETFL) failed: " << cpp_strerror(r) << dendl;
return -r;
}
if (fcntl(sd, F_SETFL, flags | O_NONBLOCK) < 0) {
r = errno;
lderr(cct) << __func__ << " fcntl(F_SETFL,O_NONBLOCK): " << cpp_strerror(r) << dendl;
return -r;
}
return 0;
}
int NetHandler::set_socket_options(int sd, bool nodelay, int size)
{
int r = 0;
// disable Nagle algorithm?
if (nodelay) {
int flag = 1;
r = ::setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char*)&flag, sizeof(flag));
if (r < 0) {
r = errno;
ldout(cct, 0) << "couldn't set TCP_NODELAY: " << cpp_strerror(r) << dendl;
}
}
if (size) {
r = ::setsockopt(sd, SOL_SOCKET, SO_RCVBUF, (void*)&size, sizeof(size));
if (r < 0) {
r = errno;
ldout(cct, 0) << "couldn't set SO_RCVBUF to " << size << ": " << cpp_strerror(r) << dendl;
}
}
// block ESIGPIPE
#ifdef CEPH_USE_SO_NOSIGPIPE
int val = 1;
r = ::setsockopt(sd, SOL_SOCKET, SO_NOSIGPIPE, (void*)&val, sizeof(val));
if (r) {
r = errno;
ldout(cct,0) << "couldn't set SO_NOSIGPIPE: " << cpp_strerror(r) << dendl;
}
#endif
return -r;
}
void NetHandler::set_priority(int sd, int prio, int domain)
{
#ifdef SO_PRIORITY
if (prio < 0) {
return;
}
int r = -1;
#ifdef IPTOS_CLASS_CS6
int iptos = IPTOS_CLASS_CS6;
switch (domain) {
case AF_INET:
r = ::setsockopt(sd, IPPROTO_IP, IP_TOS, &iptos, sizeof(iptos));
break;
case AF_INET6:
r = ::setsockopt(sd, IPPROTO_IPV6, IPV6_TCLASS, &iptos, sizeof(iptos));
break;
default:
lderr(cct) << "couldn't set ToS of unknown family (" << domain << ")"
<< " to " << iptos << dendl;
return;
}
if (r < 0) {
r = errno;
ldout(cct,0) << "couldn't set TOS to " << iptos
<< ": " << cpp_strerror(r) << dendl;
}
#endif // IPTOS_CLASS_CS6
// setsockopt(IPTOS_CLASS_CS6) sets the priority of the socket as 0.
// See http://goo.gl/QWhvsD and http://goo.gl/laTbjT
// We need to call setsockopt(SO_PRIORITY) after it.
r = ::setsockopt(sd, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio));
if (r < 0) {
r = errno;
ldout(cct, 0) << __func__ << " couldn't set SO_PRIORITY to " << prio
<< ": " << cpp_strerror(r) << dendl;
}
#else
return;
#endif // SO_PRIORITY
}
int NetHandler::generic_connect(const entity_addr_t& addr, const entity_addr_t &bind_addr, bool nonblock)
{
int ret;
int s = create_socket(addr.get_family());
if (s < 0)
return s;
if (nonblock) {
ret = set_nonblock(s);
if (ret < 0) {
close(s);
return ret;
}
}
set_socket_options(s, cct->_conf->ms_tcp_nodelay, cct->_conf->ms_tcp_rcvbuf);
{
entity_addr_t addr = bind_addr;
if (cct->_conf->ms_bind_before_connect && (!addr.is_blank_ip())) {
addr.set_port(0);
ret = ::bind(s, addr.get_sockaddr(), addr.get_sockaddr_len());
if (ret < 0) {
ret = errno;
ldout(cct, 2) << __func__ << " client bind error " << ", " << cpp_strerror(ret) << dendl;
close(s);
return -ret;
}
}
}
ret = ::connect(s, addr.get_sockaddr(), addr.get_sockaddr_len());
if (ret < 0) {
ret = errno;
if (errno == EINPROGRESS && nonblock)
return s;
ldout(cct, 10) << __func__ << " connect: " << cpp_strerror(ret) << dendl;
close(s);
return -ret;
}
return s;
}
int NetHandler::reconnect(const entity_addr_t &addr, int sd)
{
int r = 0;
int ret = ::connect(sd, addr.get_sockaddr(), addr.get_sockaddr_len());
if (ret < 0 && errno != EISCONN) {
r = errno;
ldout(cct, 10) << __func__ << " reconnect: " << strerror(r) << dendl;
if (r == EINPROGRESS || r == EALREADY)
return 1;
return -r;
}
return 0;
}
int NetHandler::connect(const entity_addr_t &addr, const entity_addr_t& bind_addr)
{
return generic_connect(addr, bind_addr, false);
}
int NetHandler::nonblock_connect(const entity_addr_t &addr, const entity_addr_t& bind_addr)
{
return generic_connect(addr, bind_addr, true);
}
}
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