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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) 2011 New Dream Network
*
* 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.
*
*/
#ifndef CEPH_COMMON_ADMIN_SOCKET_H
#define CEPH_COMMON_ADMIN_SOCKET_H
#include "common/Thread.h"
#include "common/Mutex.h"
#include <string>
#include <map>
#include "include/buffer.h"
class AdminSocket;
class CephContext;
#define CEPH_ADMIN_SOCK_VERSION "2"
class AdminSocketHook {
public:
virtual bool call(std::string command, std::string args, bufferlist& out) = 0;
virtual ~AdminSocketHook() {};
};
class AdminSocket : public Thread
{
public:
AdminSocket(CephContext *cct);
virtual ~AdminSocket();
/**
* register an admin socket command
*
* The command is registered under a command string. Incoming
* commands are split by space and matched against the longest
* registered command. For example, if 'foo' and 'foo bar' are
* registered, and an incoming command is 'foo bar baz', it is
* matched with 'foo bar', while 'foo fud' will match 'foo'.
*
* The entire incoming command string is passed to the registred
* hook.
*
* @param command command string
* @param hook implementaiton
* @param help help text. if empty, command will not be included in 'help' output.
*
* @return 0 for success, -EEXIST if command already registered.
*/
int register_command(std::string command, AdminSocketHook *hook, std::string help);
/**
* unregister an admin socket command
*
* @param command command string
* @return 0 on succest, -ENOENT if command dne.
*/
int unregister_command(std::string command);
bool init(const std::string &path);
private:
AdminSocket(const AdminSocket& rhs);
AdminSocket& operator=(const AdminSocket &rhs);
void shutdown();
std::string create_shutdown_pipe(int *pipe_rd, int *pipe_wr);
std::string bind_and_listen(const std::string &sock_path, int *fd);
void *entry();
bool do_accept();
CephContext *m_cct;
std::string m_path;
int m_sock_fd;
int m_shutdown_rd_fd;
int m_shutdown_wr_fd;
Mutex m_lock; // protects m_hooks, m_help
AdminSocketHook *m_version_hook, *m_help_hook;
std::map<std::string,AdminSocketHook*> m_hooks;
std::map<std::string,std::string> m_help;
friend class AdminSocketTest;
friend class HelpHook;
};
#endif
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