XrdCmsAdmin.cc

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/******************************************************************************/
/*                                                                            */
/*                        X r d C m s A d m i n . c c                         */
/*                                                                            */
/* (c) 2007 by the Board of Trustees of the Leland Stanford, Jr., University  */
/*                            All Rights Reserved                             */
/*   Produced by Andrew Hanushevsky for Stanford University under contract    */
/*              DE-AC02-76-SFO0515 with the Department of Energy              */
/*                                                                            */
/* This file is part of the XRootD software suite.                            */
/*                                                                            */
/* XRootD is free software: you can redistribute it and/or modify it under    */
/* the terms of the GNU Lesser General Public License as published by the     */
/* Free Software Foundation, either version 3 of the License, or (at your     */
/* option) any later version.                                                 */
/*                                                                            */
/* XRootD is distributed in the hope that it will be useful, but WITHOUT      */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or      */
/* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public       */
/* License for more details.                                                  */
/*                                                                            */
/* You should have received a copy of the GNU Lesser General Public License   */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file  */
/* COPYING (GPL license).  If not, see <http://www.gnu.org/licenses/>.        */
/*                                                                            */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without  */
/* specific prior written permission of the institution or contributor.       */
/******************************************************************************/
 
#include <cstdio>
#include <limits.h>
#include <string>
#include <unistd.h>
#include <cinttypes>
#include <netinet/in.h>
#include <sys/types.h>
 
#include "XProtocol/XProtocol.hh"
#include "XProtocol/YProtocol.hh"
 
#include "XrdCms/XrdCmsAdmin.hh"
#include "XrdCms/XrdCmsConfig.hh"
#include "XrdCms/XrdCmsManager.hh"
#include "XrdCms/XrdCmsMeter.hh"
#include "XrdCms/XrdCmsPrepare.hh"
#include "XrdCms/XrdCmsState.hh"
#include "XrdCms/XrdCmsTrace.hh"
#include "XrdNet/XrdNetSocket.hh"
#include "XrdOuc/XrdOuca2x.hh"
#include "XrdOuc/XrdOucName2Name.hh"
#include "XrdOuc/XrdOucTList.hh"
#include "XrdSys/XrdSysError.hh"
#include "XrdSys/XrdSysPlatform.hh"
#include "XrdSys/XrdSysTimer.hh"
 
using namespace XrdCms;
 
/******************************************************************************/
/*                         L o c a l   C l a s s e s                          */
/******************************************************************************/
  
namespace XrdCms
{
class AdminReq
{
public:
 
       AdminReq *Next;
const  char     *Req;
const  char     *Path;
       CmsRRHdr  Hdr;
       char     *Data;
       int       Dlen;
static int       numinQ;
static const int maxinQ = 1024;
 
static AdminReq *getReq() {AdminReq *arP;
                           do {QPresent.Wait();
                               QMutex.Lock();
                               if ((arP = First))
                                  {if (!(First = arP->Next)) Last = 0;
                                   numinQ--;
                                  }
                               QMutex.UnLock();
                              } while (!arP);
                           return arP;
                          }
 
       void      Requeue() {QMutex.Lock();
                            Next=First; First=this; QPresent.Post(); numinQ++;
                            QMutex.UnLock();
                           }
 
          AdminReq(const char *req, XrdCmsRRData &RRD) 
                  : Next(0), Req(req), Path(RRD.Path ? RRD.Path : ""),
                    Hdr(RRD.Request), Data(RRD.Buff), Dlen(RRD.Dlen)
                  {RRD.Buff = 0;
                   QMutex.Lock();
                   if (Last) {Last->Next = this; Last = this;}
                      else    First=Last = this;
                   QPresent.Post();
                   numinQ++;
                   QMutex.UnLock();
                  }
 
     ~AdminReq() {if (Data) free(Data);}
 
private:
 
static XrdSysSemaphore QPresent;
static XrdSysMutex     QMutex;
static AdminReq       *First;
static AdminReq       *Last;
};
 
extern XrdCmsMeter Meter;
};
 
/******************************************************************************/
/*                     G l o b a l s   &   S t a t i c s                      */
/******************************************************************************/
 
 
       XrdSysSemaphore  AdminReq::QPresent(0);
       XrdSysMutex      AdminReq::QMutex;
       AdminReq        *AdminReq::First = 0;
       AdminReq        *AdminReq::Last  = 0;
       int              AdminReq::numinQ= 0;
 
       XrdOssStatInfo2_t  XrdCmsAdmin::areFunc  = 0;
       XrdOucTList       *XrdCmsAdmin::areFirst = 0;
       XrdOucTList       *XrdCmsAdmin::areLast  = 0;
       XrdSysMutex        XrdCmsAdmin::areMutex;
       XrdSysSemaphore    XrdCmsAdmin::areSem(0);
       bool               XrdCmsAdmin::arePost  = false;
 
       XrdSysMutex      XrdCmsAdmin::myMutex;
       XrdSysSemaphore *XrdCmsAdmin::SyncUp = 0;
       int              XrdCmsAdmin::POnline= 0;
 
/******************************************************************************/
/*            E x t e r n a l   T h r e a d   I n t e r f a c e s             */
/******************************************************************************/
  
namespace
{
void *AdminLogin(void *carg)
      {XrdCmsAdmin *Admin = new XrdCmsAdmin();
       Admin->Login(*(int *)carg);
       delete Admin;
       return (void *)0;
      }
  
void *AdminMonAds(void *carg)
      {XrdCmsAdmin *Admin = (XrdCmsAdmin *)carg;
       Admin->MonAds();
       return (void *)0;
      }
  
void *AdminMonARE(void *carg)
      {XrdCmsAdmin::RelayAREvent();
       return (void *)0;
      }
 
void *AdminSend(void *carg)
      {XrdCmsAdmin::Relay(0,0);
       return (void *)0;
      }
}
  
/******************************************************************************/
/*                          I n i t A R E v e n t s                           */
/******************************************************************************/
  
bool XrdCmsAdmin::InitAREvents(void *arFunc)
{
   pthread_t tid;
 
// Record the function we will be using
//
   areFunc = (XrdOssStatInfo2_t)arFunc;
 
// Start the event relay
//
   if (XrdSysThread::Run(&tid, AdminMonARE, (void *)0))
      {Say.Emsg("InitAREvents", errno, "start arevent relay");
       return false;
      }
 
// All done
//
   return true;
}
  
/******************************************************************************/
/*                                 L o g i n                                  */
/******************************************************************************/
  
void XrdCmsAdmin::Login(int socknum)
{
   const char *epname = "Admin_Login";
   const char *sMsg[2] = {"temporary suspend requested by",
                          "long-term suspend requested by"};
   char *request, *tp;
   int sPerm;
 
// Attach the socket FD to a stream
//
   Stream.Attach(socknum);
 
// The first request better be "login"
//
   if ((request = Stream.GetLine()))
      {DEBUG("initial request: '" <<request <<"'");
       if (!(tp = Stream.GetToken()) || strcmp("login", tp) || !do_Login())
          {Say.Emsg(epname, "Invalid admin login sequence");
           return;
          }
       } else {Say.Emsg(epname, "No admin login specified");
               return;
              }
 
// Start receiving requests on this stream
//
   while((request = Stream.GetLine()))
        {DEBUG("received request: '" <<request <<"'");
         if ((tp = Stream.GetToken()))
            {     if (!strcmp("resume",   tp))
                     {if ((tp = Stream.GetToken()) && *tp == 't') sPerm = 0;
                         else sPerm = 1;
                      CmsState.Update(XrdCmsState::Active, 1, sPerm);
                     }
             else if (!strcmp("rmdid",    tp)) do_RmDid();   // via lfn
             else if (!strcmp("newfn",    tp)) do_RmDud();   // via lfn
             else if (!strcmp("perf",     tp)) do_Perf();
             else if (!strcmp("PERF",     tp)) do_Perf(true);
             else if (!strcmp("suspend",  tp)) 
                     {if ((tp = Stream.GetToken()) && *tp == 't') sPerm = 0;
                         else sPerm = 1;
                      CmsState.Update(XrdCmsState::Active, 0, sPerm);
                      Say.Emsg("Login", sMsg[sPerm], Stype, Sname);
                     }
             else Say.Emsg(epname, "invalid admin request,", tp);
            }
        }
 
// The socket disconnected
//
   Say.Emsg("Login", Stype, Sname, "logged out");
 
// If this is a primary, we must suspend but do not record this event!
//
   if (Primary) 
      {CmsState.Update(XrdCmsState::FrontEnd, 0, -1);
       myMutex.Lock();
       POnline = 0;
       Relay(1,-1);
       myMutex.UnLock();
      }
   return;
}
 
/******************************************************************************/
/*                                M o n A d s                                 */
/******************************************************************************/
  
void XrdCmsAdmin::MonAds()
{
   const char *epname = "MonAds";
   int sFD, rc;
   char buff[256], pname[64];
 
// Indicate what we are doing
//
   sprintf(pname, "'altds@localhost:%d'.", Config.adsPort);
   Say.Emsg(epname, "Monitoring", pname);
 
// Create a socket and to connect to the alternate data server then monitor it
// draining any data that might be sent.
//
do{sFD = Con2Ads(pname);
 
   do {do {rc = read(sFD, buff, sizeof(buff));} while(rc > 0);
      } while(rc < 0 && errno == EINTR);
 
   if (rc < 0) Say.Emsg(epname, errno, "maintain contact with", pname);
      else     Say.Emsg(epname,"Lost contact with", pname);
 
   CmsState.Update(XrdCmsState::FrontEnd, 0, -1);
   close(sFD);
   XrdSysTimer::Snooze(15);
 
  } while(1);
}
  
/******************************************************************************/
/*                                 N o t e s                                  */
/******************************************************************************/
  
void *XrdCmsAdmin::Notes(XrdNetSocket *AnoteSock)
{
   const char *epname = "Notes";
   char *request, *tp;
   int rc;
 
// Bind the udp socket to a stream
//
   Stream.Attach(AnoteSock->Detach());
   Sname = strdup("anon");
 
// Accept notifications in an endless loop
//
   do {while((request = Stream.GetLine()))
            {DEBUG("received notification: '" <<request <<"'");
             if ((tp = Stream.GetToken()))
                {     if (!strcmp("gone",    tp)) do_RmDid(1); // via pfn
                 else if (!strcmp("rmdid",   tp)) do_RmDid(0); // via lfn
                 else if (!strcmp("have",    tp)) do_RmDud(1); // via pfn
                 else if (!strcmp("newfn",   tp)) do_RmDud(0); // via lfn
                 else if (!strcmp("nostage", tp))
                         {CmsState.Update(XrdCmsState::Stage, 0);
                          Say.Emsg("Notes","nostage requested by",Stype,Sname);
                         }
                 else if (!strcmp("stage",   tp))
                          CmsState.Update(XrdCmsState::Stage, 1);
                 else Say.Emsg(epname, "invalid notification,", tp);
                }
            }
       if ((rc = Stream.LastError())) break;
       rc = Stream.Detach(); Stream.Attach(rc);
      } while(1);
 
// We should never get here
//
   Say.Emsg(epname, rc, "accept notification");
   return (void *)0;
}
 
/******************************************************************************/
/*                                 R e l a y                                  */
/******************************************************************************/
  
void XrdCmsAdmin::Relay(int setSock, int newSock)
{
   const char            *epname = "Admin_Relay";
   static const int       HdrSz = sizeof(CmsRRHdr);
   static XrdSysMutex     SMutex;
   static XrdSysSemaphore SReady(0);
   static int             curSock = -1;
   AdminReq              *arP;
   int                    retc, mySock = -1;
 
// Set socket for writing (called from admin thread when pimary logs on)
   if (setSock)
      {SMutex.Lock();
       if (curSock >= 0) close(curSock);
          else if (newSock >= 0) SReady.Post();
       if (newSock < 0) curSock = -1;
          else {curSock = dup(newSock); XrdNetSocket::setOpts(curSock, 0);}
       SMutex.UnLock();
       return;
      }
 
// This is just an endless loop
//
   do {while(mySock < 0)
            {SMutex.Lock();
             if (curSock < 0) {SMutex.UnLock(); SReady.Wait(); SMutex.Lock();}
             mySock = curSock; curSock = -1;
             SMutex.UnLock();
            }
 
       do {arP = AdminReq::getReq();
 
           if ((retc = write(mySock, &arP->Hdr, HdrSz))     != HdrSz
           ||  (retc = write(mySock, arP->Data, arP->Dlen)) != arP->Dlen)
              retc = (retc < 0 ? errno : ECANCELED);
              else {DEBUG("sent " <<arP->Req <<' ' <<arP->Path);
                    delete arP; retc = 0;
                   }
          } while(retc == 0);
 
       if (retc) Say.Emsg("AdminRelay", retc, "relay", arP->Req);
       arP->Requeue();
       close(mySock);
       mySock = -1;
      } while(1);
}
 
/******************************************************************************/
/*                          R e l a y A R E v e n t                           */
/******************************************************************************/
 
void XrdCmsAdmin::RelayAREvent()
{
   EPNAME("RelayAREvent");
   const char *evWhat;
   XrdOucTList *evP;
   int evType, mod;
 
// Endless loop relaying events
//
do{areMutex.Lock();
   while((evP = areFirst))
        {if (evP == areLast) areFirst = areLast = 0;
            else areFirst = evP->next;
         areMutex.UnLock();
         XrdCms::CmsReqCode reqCode = static_cast<CmsReqCode>(evP->ival[0]);
         mod = evP->ival[1];
         if (reqCode == kYR_have)
            {if (mod & CmsHaveRequest::Pending)
                {evType = XrdOssStatEvent::PendAdded;
                 evWhat = "pend ";
                } else {
                 evType = XrdOssStatEvent::FileAdded;
                 evWhat = "have ";
                }
            } else {
             evType = XrdOssStatEvent::FileRemoved;
             evWhat = "gone ";
            }
         (*areFunc)(evP->text, 0, evType, 0, evP->text);
         DEBUG("sending managers " <<evWhat <<evP->text);
         XrdCmsManager::Inform(reqCode, mod, evP->text, strlen(evP->text)+1);
         delete evP;
         areMutex.Lock();
        }
   arePost = true;
   areMutex.UnLock();
   areSem.Wait();
  } while(true);
}
  
/******************************************************************************/
/*                                  S e n d                                   */
/******************************************************************************/
  
void XrdCmsAdmin::Send(const char *Req, XrdCmsRRData &Data)
{
// AdminReq *arP;
 
   if (AdminReq::numinQ < AdminReq::maxinQ) new AdminReq(Req, Data);
      else Say.Emsg("Send", "Queue full; ignoring", Req, Data.Path);
}
 
/******************************************************************************/
/*                                 S t a r t                                  */
/******************************************************************************/
  
void *XrdCmsAdmin::Start(XrdNetSocket *AdminSock)
{
   const char *epname = "Start";
   int InSock;
   pthread_t tid;
 
// Start the relay thread
//
   if (XrdSysThread::Run(&tid, AdminSend, (void *)0))
      Say.Emsg(epname, errno, "start admin relay");
 
// If we are in independent mode then let the caller continue
//
   if (Config.doWait)
      {if (Config.adsPort) BegAds();
          {char dest[512];
           AdminSock->SockName(dest, sizeof(dest));
           Say.Emsg(epname, "Waiting for primary server to login via", dest);
          }
      }
       else if (SyncUp) {SyncUp->Post(); SyncUp = 0;}
 
// Accept connections in an endless loop
//
   while(1) if ((InSock = AdminSock->Accept()) >= 0)
               {XrdNetSocket::setOpts(InSock, 0);
                if (XrdSysThread::Run(&tid, AdminLogin, (void *)&InSock))
                   {Say.Emsg(epname, errno, "start admin");
                    close(InSock);
                   }
               } else Say.Emsg(epname, errno, "accept connection");
   return (void *)0;
}
 
/******************************************************************************/
/*                       P r i v a t e   M e t h o d s                        */
/******************************************************************************/
/******************************************************************************/
/*                              A d d E v e n t                               */
/******************************************************************************/
 
void XrdCmsAdmin::AddEvent(const char *path, XrdCms::CmsReqCode req, int mods)
{
   int info[2] = {(int)req, mods};
   XrdOucTList *evP = new XrdOucTList(path, info);
 
// Add the event to he queue
//
   areMutex.Lock();
   if (areLast) areLast->next = evP;
      else      areFirst      = evP;
   areLast = evP;
   if (arePost) {areSem.Post(); arePost = false;}
   areMutex.UnLock();
}
 
/******************************************************************************/
/*                                B e g A d s                                 */
/******************************************************************************/
 
void XrdCmsAdmin::BegAds()
{
   const char *epname = "BegAds";
   pthread_t tid;
 
// If we don't need to monitor he alternate data server then we are all set
//
   if (!Config.adsMon)
      {Say.Emsg(epname, "Assuming alternate data server is functional.");
       CmsState.Update(XrdCmsState::FrontEnd, 1, Config.adsPort);
       if (SyncUp) {SyncUp->Post(); SyncUp = 0;}
       return;
      }
 
// Start the connection/ping thread for the alternate data server
//
   if (XrdSysThread::Run(&tid, AdminMonAds, (void *)this))
      Say.Emsg(epname, errno, "start alternate data server monitor");
}
  
/******************************************************************************/
/*                             C h e c k V N i d                              */
/******************************************************************************/
 
bool XrdCmsAdmin::CheckVNid(const char *xNid)
{
 
// Check if we have a vnid but the server is supplying one or is not the same
//
   if (Config.myVNID)
      {if (!xNid)
          {Say.Emsg("do_Login", "Warning! No xrootd vnid specified; "
                                "proceeding only with cmsd vnid.");
           return true;
          }
       if (!strcmp(xNid, Config.myVNID)) return true;
       std::string msg("xrootd vnid '");
       msg += xNid; msg += "' does not match cmsd vnid '";
       msg += Config.myVNID; msg += "'.";
       Say.Emsg("do_Login", msg.c_str());
       return false;
      }
 
// We don't have a vnid, check if one is present
//
   if (xNid) Say.Emsg("do_Login", "Warning! xrootd has a vnid but cmsd does "
                                  "not; proceeding without a vnid!");
   return true;
}
  
/******************************************************************************/
/*                               C o n 2 A d s                                */
/******************************************************************************/
  
int XrdCmsAdmin::Con2Ads(const char *pname)
{
   const char *epname = "Con2Ads";
   static ClientInitHandShake hsVal = {0, 0, 0, (int)htonl(4), (int)htonl(2012)};
   static ClientLoginRequest loginReq = {{0, 0},
                                         (kXR_unt16)htons(kXR_login),
                                         (kXR_int32)htonl(getpid()),
                                         {'c', 'm', 's', 'd', 0, 0, 0, 0},
                                         0, 0, {0}, 0, 0};
   struct {kXR_int32 siHS[4];} hsRsp;
   XrdNetSocket adsSocket;
   int ecode, snum;
   char ecnt = 10;
 
// Create a socket and to connect to the alternate data server
//
do{while((snum = adsSocket.Open("localhost", Config.adsPort)) < 0)
        {if (ecnt >= 10)
            {ecode = adsSocket.LastError();
             Say.Emsg(epname, ecode, "connect to", pname);
             ecnt = 1;
            } else ecnt++;
         XrdSysTimer::Snooze(3);
        }
 
// Write the handshake to make sure the connection went fine
//
   if (write(snum, &hsVal, sizeof(hsVal)) < 0)
      {Say.Emsg(epname, errno, "send handshake to", pname);
       close(snum); continue;
      }
 
// Read the mandatory response
//
   if (recv(snum, &hsRsp, sizeof(hsRsp), MSG_WAITALL) < 0)
      {Say.Emsg(epname, errno, "recv handshake from", pname);
       close(snum); continue;
      }
 
// Now we need to send the login request
//
   if (write(snum, &loginReq, sizeof(loginReq)) < 0)
      {Say.Emsg(epname, errno, "send login to", pname);
       close(snum); continue;
      } else break;
 
  } while(1);
 
// Indicate what we just did
//
   Say.Emsg(epname, "Logged into", pname);
 
// We connected, so we indicate that the alternate is ok
//
   myMutex.Lock();
   CmsState.Update(XrdCmsState::FrontEnd, 1, Config.adsPort);
   if (SyncUp) {SyncUp->Post(); SyncUp = 0;}
   myMutex.UnLock();
 
// All done
//
   return adsSocket.Detach();
}
  
/******************************************************************************/
/*                              d o _ L o g i n                               */
/******************************************************************************/
  
int XrdCmsAdmin::do_Login()
{
   std::string vnidVal;
   const char *emsg;
   char buff[64], *tp, Ltype = 0;
   int Port = 0;
 
// Process: login {p | P | s | u} <name> [port <port>] [nid <nid>]
//
   if (!(tp = Stream.GetToken()))
      {Say.Emsg("do_Login", "login type not specified");
       return 0;
      }
 
   Ltype = *tp;
   if (*(tp+1) == '\0')
      switch (*tp)
             {case 'p': Stype = "Primary server"; break;
              case 'P': Stype = "Proxy server";   break;
              case 's': Stype = "Server";         break;
              case 'u': Stype = "Admin";          break;
              default:  Ltype = 0;                break;
             }
 
   if (!Ltype)
      {Say.Emsg("do_Login", "Invalid login type,", tp);
       return 0;
      } else Ltype = *tp;
 
   if (Config.adsPort && Ltype != 'u')
      {Say.Emsg("do_login", Stype, " login rejected; configured for an "
                                   "alternate data server.");
       return 0;
      }
 
   if (!(tp = Stream.GetToken()))
      {Say.Emsg("do_Login", "login name not specified");
       return 0;
      } else Sname = strdup(tp);
 
// Get any additional options
//
   while((tp = Stream.GetToken()))
        {     if (!strcmp(tp, "port"))
                 {if (!(tp = Stream.GetToken()))
                     {Say.Emsg("do_Login", "login port not specified");
                      return 0;
                     }
                  if (XrdOuca2x::a2i(Say,"login port",tp,&Port,0))
                     return 0;
                 }
         else if (!strcmp(tp, "vnid"))
                 {if (!(tp = Stream.GetToken()))
                     {Say.Emsg("do_Login", "vnid value not specified");
                      return 0;
                     }
                  vnidVal = tp;
                 }
         else    {Say.Emsg("do_Login", "invalid login option -", tp);
                  return 0;
                 }
        }
 
// If this is not a primary, we are done. Otherwise there is much more. We
// must make sure we are compatible with the login. Note that for alternate
// data servers we already screened out primary logins, so we will return.
//
   if (Ltype != 'p' && Ltype != 'P') return 1;
        if (Ltype == 'p' &&  Config.asProxy()) emsg = "only accepts proxies";
   else if (Ltype == 'P' && !Config.asProxy()) emsg = "does not accept proxies";
   else                                        emsg = 0;
   if (emsg) 
      {Say.Emsg("do_login", "Server login rejected; configured role", emsg);
       return 0;
      }
 
// Verify virtual networking
//
   if ((vnidVal.length() || Config.myVNID)
   && !CheckVNid(vnidVal.length() ? vnidVal.c_str() : 0))
      {Say.Emsg("do_login", "Server login rejected; virtual networking error.");
       return 0;
      }
 
// Discard login if this is a duplicate primary server
//
   myMutex.Lock();
   if (POnline)
      {myMutex.UnLock();
       Say.Emsg("do_Login", "Primary server already logged in; login of", 
                                   tp, "rejected.");
       return 0;
      }
 
// Indicate we have a primary
//
   Primary = 1;
   POnline = 1;
   Relay(1, Stream.FDNum());
   CmsState.Update(XrdCmsState::FrontEnd, 1, Port);
 
// Check if this is the first primary login and resume if we must
//
   if (SyncUp) {SyncUp->Post(); SyncUp = 0;}
   myMutex.UnLock();
 
// Document the login
//
   sprintf(buff, "logged in; data port is %d", Port);
   Say.Emsg("do_Login:", Stype, Sname, buff);
   return 1;
}
 
/******************************************************************************/
/*                               d o _ P e r f                                */
/******************************************************************************/
  
void XrdCmsAdmin::do_Perf(bool alert)
{
   const char *epname = "do_Perf";
   char  buff[256];
 
   if (!Stream.GetRest(buff, sizeof(buff)))
      Say.Emsg(epname,"performance data is too long.");
      else if (!Meter.Update(buff, alert))
              Say.Emsg(epname,"performance data is invalid.");
}
  
/******************************************************************************/
/*                              d o _ R m D i d                               */
/******************************************************************************/
  
void XrdCmsAdmin::do_RmDid(int isPfn)
{
   const char *epname = "do_RmDid";
   char  *tp, *thePath, apath[XrdCmsMAX_PATH_LEN];
   int   rc;
 
   if (!(tp = Stream.GetToken()))
      {Say.Emsg(epname,"removed path not specified by",Stype,Sname);
       return;
      }
 
// Handle prepare queue removal
//
   if (PrepQ.isOK())
      {if (!isPfn && Config.lcl_N2N)
          if ((rc = Config.lcl_N2N->lfn2pfn(tp, apath, sizeof(apath))))
             {Say.Emsg(epname, rc, "determine pfn for removed path", tp);
              thePath = 0;
             } else thePath = apath;
          else thePath = tp;
       if (thePath) PrepQ.Gone(thePath);
      }
 
// If we have a pfn then we must get the lfn to inform our manager about the file
//
   if (isPfn && Config.lcl_N2N)
      {if ((rc = Config.lcl_N2N->pfn2lfn(tp, apath, sizeof(apath))))
          {Say.Emsg(epname, rc, "determine lfn for removed path", tp);
           return;
          } else tp = apath;
      }
 
// Check if we are relaying remove events and, if so, vector through that.
//
   if (areFunc) AddEvent(tp, kYR_gone, kYR_raw);
      else {DEBUG("sending managers gone " <<tp);
            XrdCmsManager::Inform(kYR_gone, kYR_raw, tp, strlen(tp)+1);
           }
}
 
/******************************************************************************/
/*                              d o _ R m D u d                               */
/******************************************************************************/
  
void XrdCmsAdmin::do_RmDud(int isPfn)
{
   const char *epname = "do_RmDud";
   char *tp, *pp, apath[XrdCmsMAX_PATH_LEN];
   int   rc, Mods = kYR_raw;
 
   if (!(tp = Stream.GetToken()))
      {Say.Emsg(epname,"added path not specified by",Stype,Sname);
       return;
      }
 
   if ((pp = Stream.GetToken()) && *pp == 'p') Mods |= CmsHaveRequest::Pending;
      else Mods |= CmsHaveRequest::Online;
 
   if (isPfn && Config.lcl_N2N)
      {if ((rc = Config.lcl_N2N->pfn2lfn(tp, apath, sizeof(apath))))
          {Say.Emsg(epname, rc, "determine lfn for added path", tp);
           return;
          } else tp = apath;
      }
 
// Check if we are relaying remove events and, if so, vector through that.
//
   if (areFunc) AddEvent(tp, kYR_have, Mods);
      else {DEBUG("sending managers have online " <<tp);
            XrdCmsManager::Inform(kYR_have, Mods, tp, strlen(tp)+1);
           }
}