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XrdCmsProtocol.cc
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XrdCmsProtocol.cc
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/******************************************************************************/
/* */
/* X r d C m s P r o t o c o l . 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 <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <netinet/in.h>
#include <sys/param.h>
#include "XProtocol/YProtocol.hh"
#include "XrdVersion.hh"
#include "Xrd/XrdInet.hh"
#include "Xrd/XrdLink.hh"
#include "XrdCms/XrdCmsBaseFS.hh"
#include "XrdCms/XrdCmsCache.hh"
#include "XrdCms/XrdCmsCluster.hh"
#include "XrdCms/XrdCmsConfig.hh"
#include "XrdCms/XrdCmsJob.hh"
#include "XrdCms/XrdCmsLogin.hh"
#include "XrdCms/XrdCmsManager.hh"
#include "XrdCms/XrdCmsManTree.hh"
#include "XrdCms/XrdCmsMeter.hh"
#include "XrdCms/XrdCmsProtocol.hh"
#include "XrdCms/XrdCmsRole.hh"
#include "XrdCms/XrdCmsRouting.hh"
#include "XrdCms/XrdCmsRTable.hh"
#include "XrdCms/XrdCmsState.hh"
#include "XrdCms/XrdCmsTrace.hh"
#include "XrdOuc/XrdOucCRC.hh"
#include "XrdOuc/XrdOucEnv.hh"
#include "XrdOuc/XrdOucPup.hh"
#include "XrdOuc/XrdOucTokenizer.hh"
#include "XrdSys/XrdSysError.hh"
#include "XrdSys/XrdSysHeaders.hh"
#include "XrdSys/XrdSysTimer.hh"
using namespace XrdCms;
/******************************************************************************/
/* G l o b a l O b j e c t s */
/******************************************************************************/
XrdSysMutex XrdCmsProtocol::ProtMutex;
XrdCmsProtocol *XrdCmsProtocol::ProtStack = 0;
int XrdCmsProtocol::readWait = 1000;
XrdCmsParser XrdCmsProtocol::ProtArgs;
namespace XrdCms
{
extern XrdOucEnv theEnv;
};
/******************************************************************************/
/* P r o t o c o l L o a d e r */
/* X r d g e t P r o t o c o l */
/******************************************************************************/
// This protocol can live in a shared library. It can also be statically linked
// to provide a default protocol (which, for cms protocol we do). The interface
// below is used by Xrd to obtain a copy of the protocol object that can be
// used to decide whether or not a link is talking our particular protocol.
// Phase 1 initialization occured on the call to XrdgetProtocolPort(). At this
// point a network interface is defined and we can complete initialization.
//
XrdVERSIONINFO(XrdgetProtocol,cmsd);
extern "C"
{
XrdProtocol *XrdgetProtocol(const char *pname, char *parms,
XrdProtocol_Config *pi)
{
// If we failed in Phase 1 initialization, immediately fail Phase 2.
//
if (Config.doWait < 0) return (XrdProtocol *)0;
// Initialize the network interface and get the actual port number assigned
//
Config.PortTCP = pi->NetTCP->Port();
Config.NetTCP = pi->NetTCP;
// If we have a connection allow list, add it to the network object. Note that
// we clear the address because the object is lost in the add process.
//
if (Config.Police) {pi->NetTCP->Secure(Config.Police); Config.Police = 0;}
// Complete initialization and upon success return a protocol object
//
if (Config.Configure2()) return (XrdProtocol *)0;
// Return a new instance of this object
//
return (XrdProtocol *)new XrdCmsProtocol();
}
}
/******************************************************************************/
/* P r o t o c o l P o r t D e t e r m i n a t i o n */
/* X r d g e t P r o t o c o l P o r t */
/******************************************************************************/
// Because the dcm port numbers are determined dynamically based on the role the
// dcm plays, we need to process the configration file and return the right
// port number if it differs from the one provided by the protocol driver. Only
// one port instance of the cmsd protocol is allowed.
//
XrdVERSIONINFO(XrdgetProtocolPort,cmsd);
extern "C"
{
int XrdgetProtocolPort(const char *pname, char *parms,
XrdProtocol_Config *pi)
{
static int thePort = -1;
char *cfn = pi->ConfigFN, buff[128];
// Check if we have been here before
//
if (thePort >= 0)
{if (pi->Port && pi->Port != thePort)
{sprintf(buff, "%d disallowed; only using port %d",pi->Port,thePort);
Say.Emsg("Config", "Alternate port", buff);
}
return thePort;
}
// Initialize the error message handler and some default values
//
Say.logger(pi->eDest->logger(0));
Config.myName = strdup(pi->myName);
Config.PortTCP = (pi->Port < 0 ? 0 : pi->Port);
Config.myInsName = strdup(pi->myInst);
Config.myProg = strdup(pi->myProg);
Sched = pi->Sched;
if (pi->DebugON) Trace.What = TRACE_ALL;
// Create an xrootd compatabile environment
//
XrdCms::theEnv.PutPtr("XrdScheduler*", Sched);
if (pi->theEnv) XrdCms::theEnv.PutPtr("xrdEnv*", pi->theEnv);
// The only parameter we accept is the name of an alternate config file
//
if (parms)
{while(*parms == ' ') parms++;
if (*parms)
{char *pp = parms;
while(*parms != ' ' && *parms) parms++;
cfn = pp;
}
}
// Put up the banner
//
Say.Say("Copr. 2007 Stanford University/SLAC cmsd.");
// Indicate failure if static init fails
//
if (cfn) cfn = strdup(cfn);
if (Config.Configure1(pi->argc, pi->argv, cfn))
{Config.doWait = -1; return 0;}
// Return the port number to be used
//
thePort = Config.PortTCP;
return thePort;
}
}
/******************************************************************************/
/* E x e c u t e */
/******************************************************************************/
int XrdCmsProtocol::Execute(XrdCmsRRData &Arg)
{
EPNAME("Execute");
static kXR_unt32 theDelay = htonl(Config.SUPDelay);
XrdCmsRouter::NodeMethod_t Method;
const char *etxt;
// Check if we can continue
//
if (CmsState.Suspended && Arg.Routing & XrdCmsRouting::Delayable)
{Reply_Delay(Arg, theDelay); return 0;}
// Validate request code and execute the request. If successful, forward the
// request to subscribers of this node if the request is forwardable.
//
if (!(Method = Router.getMethod(Arg.Request.rrCode)))
Say.Emsg("Protocol", "invalid request code from", myNode->Ident);
else if ((etxt = (myNode->*Method)(Arg)))
if (*etxt == '!')
{DEBUGR(etxt+1 <<" delayed " <<Arg.waitVal <<" seconds");
return -EINPROGRESS;
} else if (*etxt == '.') return -ECONNABORTED;
else Reply_Error(Arg, kYR_EINVAL, etxt);
else if (Arg.Routing & XrdCmsRouting::Forward && Cluster.NodeCnt
&& !(Arg.Request.modifier & kYR_dnf)) Reissue(Arg);
return 0;
}
/******************************************************************************/
/* M a t c h */
/******************************************************************************/
XrdProtocol *XrdCmsProtocol::Match(XrdLink *lp)
{
CmsRRHdr Hdr;
int dlen;
// Peek at the first few bytes of data (shouldb be all zeroes)
//
if ((dlen = lp->Peek((char *)&Hdr,sizeof(Hdr),readWait)) != sizeof(Hdr))
{if (dlen <= 0) lp->setEtext("login not received");
return (XrdProtocol *)0;
}
// Verify that this is our protocol and whether a version1 client is here
//
if (Hdr.streamid || Hdr.rrCode != kYR_login)
{if (!strncmp((char *)&Hdr, "login ", 6))
lp->setEtext("protocol version 1 unsupported");
return (XrdProtocol *)0;
}
// Return the protocol object
//
return (XrdProtocol *)XrdCmsProtocol::Alloc();
}
/******************************************************************************/
/* P a n d e r */
/******************************************************************************/
// Pander() handles all outgoing connections to a manager/supervisor
void XrdCmsProtocol::Pander(const char *manager, int mport)
{
EPNAME("Pander");
CmsLoginData Data, loginData;
unsigned int Mode, Role = 0;
int myShare = Config.P_gshr << CmsLoginData::kYR_shift;
int myTimeZ = Config.TimeZone<< CmsLoginData::kYR_shifttz;
int Lvl=0, Netopts=0, waits=6, tries=6, fails=0, xport=mport;
int rc, fsUtil, KickedOut, blRedir, myNID = Manager->ManTree->Register();
int chk4Suspend = XrdCmsState::All_Suspend, TimeOut = Config.AskPing*1000;
char envBuff[128], manbuff[264];
const char *Reason = 0, *manp = manager;
const int manblen = sizeof(manbuff);
bool terminate;
// Do some debugging
//
DEBUG(myRole <<" services to " <<manager <<':' <<mport);
// Prefill the login data
//
memset(&loginData, 0, sizeof(loginData));
loginData.SID = (kXR_char *)Config.mySID;
loginData.Paths = (kXR_char *)Config.myPaths;
loginData.sPort = Config.PortTCP;
loginData.fsNum = Meter.numFS();
loginData.tSpace= Meter.TotalSpace(loginData.mSpace);
loginData.Version = kYR_Version; // These to keep compiler happy
loginData.HoldTime= static_cast<int>(getpid());
loginData.Mode = 0;
loginData.Size = 0;
loginData.ifList = (kXR_char *)Config.ifList;
// Fill our the environment
//
if (!Config.mySite) loginData.envCGI = 0;
else {snprintf(envBuff, sizeof(envBuff), "site=%s", Config.mySite);
loginData.envCGI = (kXR_char *)envBuff;
}
// Establish request routing based on who we are
//
if (Config.SanList) {Routing= &supVOps;
Role = CmsLoginData::kYR_subman;
}
else if (Config.asManager()) Routing= (Config.asServer() ? &supVOps:&manVOps);
else Routing= (Config.asPeer() ? &supVOps:&srvVOps);
// Compute the Manager's status (this never changes for managers/supervisors)
//
if (Config.asPeer()) Role = CmsLoginData::kYR_peer;
else {if (Config.asManager()) Role |= CmsLoginData::kYR_manager;
if (Config.asServer()) Role |= CmsLoginData::kYR_server;
}
if (Config.asProxy()) Role |= CmsLoginData::kYR_proxy;
// If we are a simple server, permanently add the nostage option if we are
// not able to stage any files.
//
if (Role == CmsLoginData::kYR_server)
{if (!Config.DiskSS) Role |= CmsLoginData::kYR_nostage;}
else chk4Suspend = XrdCmsState::FES_Suspend;
// Keep connecting to our manager. If suspended, wait for a resumption first
//
do {if (Config.doWait && chk4Suspend)
while(CmsState.Suspended & chk4Suspend)
{if (!waits--)
{Say.Emsg("Pander", "Suspend state still active."); waits=6;}
XrdSysTimer::Snooze(12);
}
if (!(rc = Manager->ManTree->Trying(myNID, Lvl)) && Lvl)
{DEBUG("restarting at root node " <<manager <<':' <<mport);
manp = manager; xport = mport; Lvl = 0;
} else if (rc < 0) break;
DEBUG("trying to connect to lvl " <<Lvl <<' ' <<manp <<':' <<xport);
if (!(Link = Config.NetTCP->Connect(manp, xport, Netopts)))
{if (tries--) Netopts = XRDNET_NOEMSG;
else {tries = 6; Netopts = 0;}
if ((Lvl = Manager->myMans->Next(xport,manbuff,manblen)))
{XrdSysTimer::Snooze(3); manp = manbuff;}
else {if (manp != manager) fails++;
XrdSysTimer::Snooze(6); manp = manager; xport = mport;
}
continue;
}
Netopts = 0; tries = waits = 6;
// Obtain a new node object for this connection
//
if (!(myNode = Manager->Add(Link, Lvl+1, terminate)))
{Link->Close();
if (terminate) break;
Say.Emsg("Pander", "Unable to obtain node object.");
XrdSysTimer::Snooze(15); continue;
}
// Compute current login mode
//
Mode = Role
| (CmsState.Suspended ? int(CmsLoginData::kYR_suspend) : 0)
| (CmsState.NoStaging ? int(CmsLoginData::kYR_nostage) : 0);
if (fails >= 6 && manp == manager)
{fails = 0; Mode |= CmsLoginData::kYR_trying;}
// Login this node with the correct state
//
loginData.fSpace= Meter.FreeSpace(fsUtil);
loginData.fsUtil= static_cast<kXR_unt16>(fsUtil);
KickedOut = 0;
if (!(loginData.dPort = CmsState.Port())) loginData.dPort = 1094;
Data = loginData; Data.Mode = Mode | myShare | myTimeZ;
if (!(rc = XrdCmsLogin::Login(Link, Data, TimeOut)))
{if (!Manager->ManTree->Connect(myNID, myNode)) KickedOut = 1;
else {XrdOucEnv cgiEnv((const char *)Data.envCGI);
const char *sname = cgiEnv.Get("site");
Say.Emsg("Protocol", "Logged into", sname, Link->Name());
if (Data.SID)
Manager->Verify(Link, (const char *)Data.SID, sname);
Reason = Dispatch(isUp, TimeOut, 2);
rc = 0;
loginData.fSpace= Meter.FreeSpace(fsUtil);
loginData.fsUtil= static_cast<kXR_unt16>(fsUtil);
}
}
// Release any storage left over from the login
//
if (Data.SID) {free(Data.SID); Data.SID = 0;}
if (Data.envCGI) {free(Data.envCGI); Data.envCGI = 0;}
// Remove manager from the config
//
Manager->Remove(myNode, (rc == kYR_redirect ? "redirected"
: (Reason ? Reason : "lost connection")));
Manager->ManTree->Disc(myNID);
Link->Close();
// The Sync() will wait until all the threads we started complete. Then
// ask the manager to delete the node as it must synchronize with other
// threads relative to the manager object before being destroyed.
//
Sync(); Manager->Delete(myNode); myNode = 0; Reason = 0;
// Check if we should process the redirection
//
if (rc == kYR_redirect)
{if (!(blRedir = Data.Mode & CmsLoginData::kYR_blredir))
Manager->myMans->Add(Link->NetAddr(), (char *)Data.Paths,
Config.PortTCP, Lvl+1);
else Manager->Rerun((char *)Data.Paths);
free(Data.Paths);
if (blRedir) break;
}
// Cycle on to the next manager if we have one or snooze and try over
//
if (!KickedOut && (Lvl = Manager->myMans->Next(xport,manbuff,manblen)))
{manp = manbuff; continue;}
XrdSysTimer::Snooze((rc < 0 ? 60 : 9)); Lvl = 0;
if (manp != manager) fails++;
manp = manager; xport = mport;
} while(1);
// This must have been a permanent redirect. Tell the manager we are done.
//
Manager->Finished(manager, mport);
// Recycle the protocol object
//
Recycle(0, 0, 0);
}
/******************************************************************************/
/* P r o c e s s */
/******************************************************************************/
// Process is called only when we get a new connection. We only return when
// the connection drops. At that point we immediately mark he node as offline
// to prohibit its selection in the future (it may have already been selected).
// Unfortunately, we need the global selection lock to do that.
//
int XrdCmsProtocol::Process(XrdLink *lp)
{
const char *Reason;
Bearing myWay;
int tOut;
// Now admit the login
//
Link = lp;
if ((Routing=Admit()))
{loggedIn = 1;
if (RSlot) {myWay = isLateral; tOut = -1;}
else {myWay = isDown; tOut = Config.AskPing*1000;}
myNode->UnLock();
if ((Reason = Dispatch(myWay, tOut, 2))) lp->setEtext(Reason);
Cluster.SLock(true); myNode->isOffline = 1; Cluster.SLock(false);
}
// Serialize all activity on the link before we proceed. This makes sure that
// there are no outstanding tasks initiated by this node. We don't need a node
// lock for this because we are no longer reading requests so no new tasks can
// be started. Since the node is marked bound, any attempt to reconnect will be
// rejected until we finish removing this node. We get the node lock afterwards.
//
lp->Serialize();
if (!myNode) return -1;
Sync();
myNode->Lock(false);
// Immediately terminate redirectors (they have an Rslot). The redirector node
// can be directly deleted as all references were serialized through the
// RTable and one we remove our node there can be no references left.
//
if (RSlot)
{RTable.Del(myNode); RSlot = 0;
myNode->UnLock(); delete myNode; myNode = 0;
return -1;
}
// We have a node that may or may not be in the cluster at this point, or may
// need to remain in the cluster as a shadow member. In any case, the node
// object lock will be released by Remove().
//
if (myNode)
{myNode->isConn = 0;
if (myNode->isBound) Cluster.Remove(0, myNode, !loggedIn);
else if (myNode->isGone) Cluster.Remove(myNode);
else myNode->UnLock();
}
// All done indicate the connection is dead
//
return -1;
}
/******************************************************************************/
/* R e c y c l e */
/******************************************************************************/
void XrdCmsProtocol::Recycle(XrdLink *lp, int consec, const char *reason)
{
bool isLoggedIn = loggedIn != 0;
ProtMutex.Lock();
ProtLink = ProtStack;
ProtStack = this;
ProtMutex.UnLock();
if (!lp) return;
if (isLoggedIn)
if (reason) Say.Emsg("Protocol", lp->ID, "logged out;", reason);
else Say.Emsg("Protocol", lp->ID, "logged out.");
else
if (reason) Say.Emsg("Protocol", lp->ID, "login failed;", reason);
}
/******************************************************************************/
/* S t a t s */
/******************************************************************************/
int XrdCmsProtocol::Stats(char *buff, int blen, int do_sync)
{
// All the statistics are handled by the cluster
//
// If we are a manager then we have different information
//
return (Config.asManager() ? Cluster.Statt(buff, blen)
: Cluster.Stats(buff, blen));
}
/******************************************************************************/
/* P r i v a t e M e t h o d s */
/******************************************************************************/
/******************************************************************************/
/* A d m i t */
/******************************************************************************/
XrdCmsRouting *XrdCmsProtocol::Admit()
{
EPNAME("Admit");
char *envP = 0, envBuff[256], myBuff[4096];
XrdCmsLogin Source(myBuff, sizeof(myBuff));
CmsLoginData Data;
XrdCmsRole::RoleID roleID = XrdCmsRole::noRole;
const char *Reason;
SMask_t newmask, servset(0);
int addedp = 0, Status = 0, isPeer = 0, isProxy = 0;
int isMan, isServ, isSubm, wasSuspended = 0, Share = 100, tZone = 0;
// Construct environment data
//
if (Config.mySite)
{snprintf(envBuff, sizeof(envBuff), "site=%s", Config.mySite);
envP = envBuff;
}
// Establish outgoing mode
//
Data.Mode = 0;
if (Trace.What & TRACE_Debug) Data.Mode |= CmsLoginData::kYR_debug;
if (CmsState.Suspended) {Data.Mode |= CmsLoginData::kYR_suspend;
wasSuspended = 1;
}
Data.HoldTime = Config.LUPHold;
// Do the login and get the data
//
if (!Source.Admit(Link, Data, Config.mySID, envP)) return 0;
// Handle Redirectors here (minimal stuff to do)
//
if (Data.Mode & CmsLoginData::kYR_director)
{Link->setID("redirector", Data.HoldTime);
return Admit_Redirector(wasSuspended);
}
// Disallow subscriptions we are are configured as a solo manager
//
if (Config.asSolo())
return Login_Failed("configuration disallows subscribers");
// Setup for role tests
//
isMan = Data.Mode & CmsLoginData::kYR_manager;
isServ = Data.Mode & CmsLoginData::kYR_server;
isSubm = Data.Mode & CmsLoginData::kYR_subman;
// Determine the role of this incomming login.
//
if (isMan)
{Status = (isServ ? CMS_isSuper|CMS_isMan : CMS_isMan);
if ((isPeer = Data.Mode & CmsLoginData::kYR_peer))
{Status |= CMS_isPeer; roleID = XrdCmsRole::PeerManager;}
else if (Data.Mode & CmsLoginData::kYR_proxy)
roleID = XrdCmsRole::ProxyManager;
else if (Config.asMetaMan() || isSubm)
roleID = XrdCmsRole::Manager;
else {roleID = XrdCmsRole::Supervisor;
Status|= CMS_isSuper;
}
}
else if ((isServ = Data.Mode & CmsLoginData::kYR_server))
{if ((isProxy= Data.Mode & CmsLoginData::kYR_proxy))
{Status = CMS_isProxy; roleID = XrdCmsRole::ProxyServer;}
else roleID = XrdCmsRole::Server;
}
else if ((isPeer = Data.Mode & CmsLoginData::kYR_peer))
{Status |= CMS_isPeer; roleID = XrdCmsRole::Peer;}
else return Login_Failed("invalid login role");
// Set the link identification
//
myRole = XrdCmsRole::Name(roleID);
Link->setID(myRole, Data.HoldTime);
// Make sure that our role is compatible with the incomming role
//
Reason = 0;
if (Config.asProxy()) {if (!isProxy || isPeer)
Reason = "configuration only allows proxies";
}
else if (isProxy) Reason = "configuration disallows proxies";
else if (Config.asServer() && isPeer)
Reason = "configuration disallows peers";
if (Reason) return Login_Failed(Reason);
// The server may specify nostage and suspend
//
if (Data.Mode & CmsLoginData::kYR_nostage) Status |= CMS_noStage;
if (Data.Mode & CmsLoginData::kYR_suspend) Status |= CMS_Suspend;
// The server may specify that it has been trying for a long time
//
if (Data.Mode & CmsLoginData::kYR_trying)
Say.Emsg("Protocol",Link->Name(),"has not yet found a cluster slot!");
// Add the node. The resulting node object will be locked and the caller will
// unlock it prior to dispatching.
//
if (!(myNode = Cluster.Add(Link, Data.dPort, Status, Data.sPort,
(const char *)Data.SID, (const char *)Data.ifList)))
return (XrdCmsRouting *)0;
myNode->RoleID = static_cast<char>(roleID);
myNode->setVersion(Data.Version);
// Calculate the share as the reference mininum if we are a meta-manager
//
if (Config.asMetaMan())
{Share = (Data.Mode & CmsLoginData::kYR_share)>>CmsLoginData::kYR_shift;
if (Share <= 0 || Share > 100) Share = Config.P_gsdf;
if (Share > 0) myNode->setShare(Share);
}
// Set the node's timezone
//
tZone = (Data.Mode & CmsLoginData::kYR_tzone)>>CmsLoginData::kYR_shifttz;
tZone = myNode->setTZone(tZone);
// Record the status of the server's filesystem
//
DEBUG(Link->Name() <<" TSpace=" <<Data.tSpace <<"GB NumFS=" <<Data.fsNum
<<" FSpace=" <<Data.fSpace <<"MB MinFR=" <<Data.mSpace
<<" MB Util=" <<Data.fsUtil <<" Share=" <<Share
<<" TZone=" <<tZone);
myNode->DiskTotal = Data.tSpace;
myNode->DiskMinF = Data.mSpace;
myNode->DiskFree = Data.fSpace;
myNode->DiskNums = Data.fsNum;
myNode->DiskUtil = Data.fsUtil;
Meter.setVirtUpdt();
// Check for any configuration changes and then process all of the paths.
//
if (Data.Paths && *Data.Paths)
{XrdOucTokenizer thePaths((char *)Data.Paths);
char *tp, *pp;
ConfigCheck(Data.Paths);
while((tp = thePaths.GetLine()))
{DEBUG(Link->Name() <<" adding path: " <<tp);
if (!(tp = thePaths.GetToken())
|| !(pp = thePaths.GetToken())) break;
if (!(newmask = AddPath(myNode, tp, pp)))
return Login_Failed("invalid exported path");
servset |= newmask;
addedp= 1;
}
}
// Check if we have any special paths. If none, then add the default path.
//
if (!addedp)
{XrdCmsPInfo pinfo;
ConfigCheck(0);
pinfo.rovec = myNode->Mask();
if (myNode->isPeer) pinfo.ssvec = myNode->Mask();
servset = Cache.Paths.Insert("/", &pinfo);
Say.Emsg("Protocol", myNode->Ident, "defaulted r /");
}
// Set the reference counts for intersecting nodes to be the same.
// Additionally, indicate cache refresh will be needed because we have a new
// node that may have files the we already reported on. Note that setting
// isBad may be subject to a concurrency race, but that is still OK here.
//
Cluster.ResetRef(servset);
if (Config.asManager()) {Manager->Reset(); myNode->SyncSpace();}
myNode->isBad &= ~XrdCmsNode::isDisabled;
// At this point we can switch to nonblocking sendq for this node
//
if (Config.nbSQ && (Config.nbSQ > 1 || !myNode->inDomain()))
isNBSQ = Link->setNB();
// Document the login
//
XrdOucEnv cgiEnv((const char *)Data.envCGI);
const char *sname = cgiEnv.Get("site");
const char *lfmt = (myNode->isMan > 1 ? "Standby%s%s" : "Primary%s%s");
snprintf(envBuff,sizeof(envBuff),lfmt,(sname ? " ":""),(sname ? sname : ""));
Say.Emsg("Protocol", envBuff, myNode->Ident,
(myNode->isBad & XrdCmsNode::isSuspend ? "logged in suspended."
: "logged in."));
myNode->ShowIF();
// All done
//
return &rspVOps;
}
/******************************************************************************/
/* A d m i t _ R e d i r e c t o r */
/******************************************************************************/
XrdCmsRouting *XrdCmsProtocol::Admit_Redirector(int wasSuspended)
{
EPNAME("Admit_Redirector");
static CmsStatusRequest newState
= {{0, kYR_status, CmsStatusRequest::kYR_Resume, 0}};
// Indicate what role I have
//
myRole = "redirector";
// Director logins have no additional parameters. We return with the node object
// locked to be consistent with the way server/suprvisors nodes are returned.
//
myNode = new XrdCmsNode(Link); myNode->Lock(false);
if (!(RSlot = RTable.Add(myNode)))
{myNode->UnLock();
delete myNode;
myNode = 0;
Say.Emsg("Protocol",myNode->Ident,"login failed; too many redirectors.");
return 0;
} else myNode->setSlot(RSlot);
// If we told the redirector we were suspended then we must check if that is no
// longer true and generate a reume event as the redirector may have missed it
//
if (wasSuspended && !CmsState.Suspended)
myNode->Send((char *)&newState, sizeof(newState));
// Login succeeded
//
Say.Emsg("Protocol", myNode->Ident, "logged in.");
DEBUG(myNode->Ident <<" assigned slot " <<RSlot);
return &rdrVOps;
}
/******************************************************************************/
/* A d d P a t h */
/******************************************************************************/
SMask_t XrdCmsProtocol::AddPath(XrdCmsNode *nP,
const char *pType, const char *Path)
{
XrdCmsPInfo pinfo;
// Process: addpath {r | w | rw}[s] path
//
while(*pType)
{ if ('r' == *pType) pinfo.rovec = nP->Mask();
else if ('w' == *pType) pinfo.rovec = pinfo.rwvec = nP->Mask();
else if ('s' == *pType) pinfo.rovec = pinfo.ssvec = nP->Mask();
else return 0;
pType++;
}
// Set node options
//
nP->isRW = (pinfo.rwvec ? XrdCmsNode::allowsRW : 0)
| (pinfo.ssvec ? XrdCmsNode::allowsSS : 0);
// Add the path to the known path list
//
return Cache.Paths.Insert(Path, &pinfo);
}
/******************************************************************************/
/* A l l o c */
/******************************************************************************/
XrdCmsProtocol *XrdCmsProtocol::Alloc(const char *theRole, XrdCmsManager *uMan,
const char *theMan,
int thePort)
{
XrdCmsProtocol *xp;
// Grab a protocol object and, if none, return a new one
//
ProtMutex.Lock();
if ((xp = ProtStack)) ProtStack = xp->ProtLink;
else xp = new XrdCmsProtocol();
ProtMutex.UnLock();
// Initialize the object if we actually got one
//
if (!xp) Say.Emsg("Protocol","No more protocol objects.");
else xp->Init(theRole, uMan, theMan, thePort);
// All done
//
return xp;
}
/******************************************************************************/
/* C o n f i g C h e c k */
/******************************************************************************/
void XrdCmsProtocol::ConfigCheck(unsigned char *theConfig)
{
unsigned int ConfigID;
int tmp;
// Compute the new configuration ID
//
if (!theConfig) ConfigID = 1;
else ConfigID = XrdOucCRC::CRC32(theConfig, strlen((char *)theConfig));
// If the configuration chaged or a new node, then we must bounce this node
//
if (ConfigID != myNode->ConfigID)
{if (myNode->ConfigID) Say.Emsg("Protocol",Link->Name(),"reconfigured.");
Cache.Paths.Remove(myNode->Mask());
Cache.Bounce(myNode->Mask(), myNode->ID(tmp));
myNode->ConfigID = ConfigID;
}
}
/******************************************************************************/
/* D i s p a t c h */
/******************************************************************************/
// Dispatch is provided with three key pieces of information:
// 1) The connection bearing (isUp, isDown, isLateral) the determines how
// timeouts are to be handled.
// 2) The maximum amount to wait for data to arrive.
// 3) The number of successive timeouts we can have before we give up.
const char *XrdCmsProtocol::Dispatch(Bearing cDir, int maxWait, int maxTries)
{
EPNAME("Dispatch");
static const int ReqSize = sizeof(CmsRRHdr);
XrdCmsRRData *Data = XrdCmsRRData::Objectify();
XrdCmsJob *jp;
const char *toRC = (cDir == isUp ? "manager not active"
: "server not responding");
const char *myArgs, *myArgt;
char buff[8];
int rc, toLeft = maxTries, lastPing = Config.PingTick;
// Dispatch runs with the current thread bound to the link.
//
// Link->Bind(XrdSysThread::ID());
// Read in the request header
//
do{if ((rc = Link->RecvAll((char *)&Data->Request, ReqSize, maxWait)) < 0)
{if (rc != -ETIMEDOUT) return (myNode->isBad & XrdCmsNode::isBlisted ?
"blacklisted" : "request read failed");
if (!toLeft--) return toRC;
if (cDir == isDown)
{if (myNode->isBad & XrdCmsNode::isDoomed)
return "server blacklisted w/ redirect";
if (!SendPing()) return "server unreachable";
lastPing = Config.PingTick;
}
continue;
}
// Check if we need to ping as non-response activity may cause ping misses
//
if (cDir == isDown && lastPing != Config.PingTick)
{if (myNode->isBad & XrdCmsNode::isDoomed)
return "server blacklisted w/ redirect";
if (!SendPing()) return "server unreachable";
lastPing = Config.PingTick;
}
// Decode the length and get the rest of the data
//
toLeft = maxTries;
Data->Dlen = static_cast<int>(ntohs(Data->Request.datalen));
if ((QTRACE(Debug))
&& Data->Request.rrCode != kYR_ping && Data->Request.rrCode != kYR_pong)
DEBUG(myNode->Ident <<" for " <<Router.getName(Data->Request.rrCode)
<<" dlen=" <<Data->Dlen);
if (!(Data->Dlen)) {myArgs = myArgt = 0;}
else {if (Data->Dlen > maxReqSize)
{Say.Emsg("Protocol","Request args too long from",Link->Name());
return "protocol error";
}
if ((!Data->Buff || Data->Blen < Data->Dlen)
&& !Data->getBuff(Data->Dlen))
{Say.Emsg("Protocol", "No buffers to serve", Link->Name());
return "insufficient buffers";
}
if ((rc = Link->RecvAll(Data->Buff, Data->Dlen, maxWait)) < 0)
return (rc == -ETIMEDOUT ? "read timed out" : "read failed");
myArgs = Data->Buff; myArgt = Data->Buff + Data->Dlen;
}
// Check if request is actually valid
//
if (!(Data->Routing = Routing->getRoute(int(Data->Request.rrCode))))
{sprintf(buff, "%d", Data->Request.rrCode);
Say.Emsg("Protocol",Link->Name(),"sent an invalid request -", buff);
continue;
}
// Parse the arguments (we do this in the main thread to avoid overruns)
//
if (!(Data->Routing & XrdCmsRouting::noArgs))
{if (Data->Request.modifier & kYR_raw)
{Data->Path = Data->Buff; Data->PathLen = Data->Dlen;}
else if (!myArgs
|| !ProtArgs.Parse(int(Data->Request.rrCode),myArgs,myArgt,Data))
{Reply_Error(*Data, kYR_EINVAL, "badly formed request");
continue;
}
}
// Insert correct identification
//
if (!(Data->Ident) || !(*Data->Ident)) Data->Ident = myNode->Ident;
// Schedule this request if async. Otherwise, do this inline. Note that
// synchrnous requests are allowed to return status changes (e.g., redirect)
//
if (Data->Routing & XrdCmsRouting::isSync)
{if ((rc = Execute(*Data)) && rc == -ECONNABORTED) return "disconnected";}
else if ((jp = XrdCmsJob::Alloc(this, Data)))
{Ref(1);
Sched->Schedule((XrdJob *)jp);
Data = XrdCmsRRData::Objectify();
}
else Say.Emsg("Protocol", "No jobs to serve", Link->Name());
} while(1);
// We should never get here
//
return "logic error";
}
/******************************************************************************/
/* D o I t */
/******************************************************************************/
// Determine how we should proceed here
//
void XrdCmsProtocol::DoIt()
{
// If we have a role, then we should simply pander it
//
if (myRole) Pander(myMan, myManPort);
}