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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) 2004-2006 Sage Weil <sage@newdream.net>
*
* 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 "include/types.h"
#include "msg/Messenger.h"
#include "msg/Message.h"
#include "messages/MLog.h"
#include "messages/MLogAck.h"
#include "mon/MonMap.h"
#include <iostream>
#include <errno.h>
#include <sys/stat.h>
#include <syslog.h>
#ifdef DARWIN
#include <sys/param.h>
#include <sys/mount.h>
#endif // DARWIN
#include "common/LogClient.h"
#include "common/config.h"
#define dout_subsys ceph_subsys_monc
LogClient::LogClient(CephContext *cct, Messenger *m, MonMap *mm,
enum logclient_flag_t flags)
: cct(cct), messenger(m), monmap(mm), is_mon(flags & FLAG_MON),
log_lock("LogClient::log_lock"), last_log_sent(0), last_log(0)
{
}
LogClientTemp::LogClientTemp(clog_type type_, LogClient &parent_)
: type(type_), parent(parent_)
{
}
LogClientTemp::LogClientTemp(const LogClientTemp &rhs)
: type(rhs.type), parent(rhs.parent)
{
// don't want to-- nor can we-- copy the ostringstream
}
LogClientTemp::~LogClientTemp()
{
if (ss.peek() != EOF)
parent.do_log(type, ss);
}
void LogClient::do_log(clog_type type, std::stringstream& ss)
{
while (!ss.eof()) {
string s;
getline(ss, s);
if (!s.empty())
do_log(type, s);
}
}
void LogClient::do_log(clog_type type, const std::string& s)
{
Mutex::Locker l(log_lock);
ldout(cct,0) << "log " << type << " : " << s << dendl;
LogEntry e;
e.who = messenger->get_myinst();
e.stamp = ceph_clock_now(cct);
e.seq = ++last_log;
e.type = type;
e.msg = s;
// log to syslog?
if (cct->_conf->clog_to_syslog) {
ostringstream oss;
oss << e;
string str(oss.str());
syslog(clog_type_to_syslog_prio(e.type) | LOG_USER, "%s", str.c_str());
}
// log to monitor?
if (cct->_conf->clog_to_monitors) {
log_queue.push_back(e);
// if we are a monitor, queue for ourselves, synchronously
if (is_mon) {
assert(messenger->get_myname().is_mon());
ldout(cct,10) << "send_log to self" << dendl;
Message *log = _get_mon_log_message();
messenger->send_message(log, messenger->get_myinst());
}
}
}
void LogClient::reset_session()
{
Mutex::Locker l(log_lock);
last_log_sent = last_log - log_queue.size();
}
Message *LogClient::get_mon_log_message()
{
Mutex::Locker l(log_lock);
return _get_mon_log_message();
}
bool LogClient::are_pending()
{
Mutex::Locker l(log_lock);
return last_log > last_log_sent;
}
Message *LogClient::_get_mon_log_message()
{
if (log_queue.empty())
return NULL;
// only send entries that haven't been sent yet during this mon
// session! monclient needs to call reset_session() on mon session
// reset for this to work right.
if (last_log_sent == last_log)
return NULL;
// limit entries per message
unsigned num_unsent = last_log - last_log_sent;
unsigned num_send;
if (cct->_conf->mon_client_max_log_entries_per_message > 0)
num_send = MIN(num_unsent, (unsigned)cct->_conf->mon_client_max_log_entries_per_message);
else
num_send = num_unsent;
ldout(cct,10) << " log_queue is " << log_queue.size() << " last_log " << last_log << " sent " << last_log_sent
<< " num " << log_queue.size()
<< " unsent " << num_unsent
<< " sending " << num_send << dendl;
assert(num_unsent <= log_queue.size());
std::deque<LogEntry>::iterator p = log_queue.begin();
std::deque<LogEntry> o;
while (p->seq < last_log_sent) {
p++;
assert(p != log_queue.end());
}
while (num_send--) {
assert(p != log_queue.end());
o.push_back(*p);
last_log_sent = p->seq;
ldout(cct,10) << " will send " << *p << dendl;
p++;
}
MLog *log = new MLog(monmap->get_fsid());
log->entries.swap(o);
return log;
}
void LogClient::handle_log_ack(MLogAck *m)
{
Mutex::Locker l(log_lock);
ldout(cct,10) << "handle_log_ack " << *m << dendl;
version_t last = m->last;
deque<LogEntry>::iterator q = log_queue.begin();
while (q != log_queue.end()) {
const LogEntry &entry(*q);
if (entry.seq > last)
break;
ldout(cct,10) << " logged " << entry << dendl;
q = log_queue.erase(q);
}
m->put();
}
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