Method handle_command

src/mon/Monitor.cc:3453–4180

}

void Monitor::handle_command(MonOpRequestRef op)
{
  ceph_assert(op->is_type_command());
  auto m = op->get_req<MMonCommand>();
  if (m->fsid != monmap->fsid) {
    dout(0) << "handle_command on fsid " << m->fsid << " != " << monmap->fsid
	    << dendl;
    reply_command(op, -EPERM, "wrong fsid", 0);
    return;
  }

  MonSession *session = op->get_session();
  if (!session) {
    dout(5) << __func__ << " dropping stray message " << *m << dendl;
    return;
  }

  if (m->cmd.empty()) {
    reply_command(op, -EINVAL, "no command specified", 0);
    return;
  }

  string prefix;
  vector<string> fullcmd;
  cmdmap_t cmdmap;
  stringstream ss, ds;
  bufferlist rdata;
  string rs;
  int r = -EINVAL;
  rs = "unrecognized command";

  if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
    // ss has reason for failure
    r = -EINVAL;
    rs = ss.str();
    if (!m->get_source().is_mon())  // don't reply to mon->mon commands
      reply_command(op, r, rs, 0);
    return;
  }

  // check return value. If no prefix parameter provided,
  // return value will be false, then return error info.
  if (!cmd_getval(cmdmap, "prefix", prefix)) {
    reply_command(op, -EINVAL, "command prefix not found", 0);
    return;
  }

  // check prefix is empty
  if (prefix.empty()) {
    reply_command(op, -EINVAL, "command prefix must not be empty", 0);
    return;
  }

  if (prefix == "get_command_descriptions") {
    bufferlist rdata;
    Formatter *f = Formatter::create("json");

    std::vector<MonCommand> commands = static_cast<MgrMonitor*>(