-
Notifications
You must be signed in to change notification settings - Fork 149
/
XrdCmsProtocol.cc
1266 lines (1095 loc) · 46.1 KB
/
XrdCmsProtocol.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/******************************************************************************/
/* */
/* 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;
time_t ddmsg = time(0);
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 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;
loginData.envCGI = (kXR_char *)Config.envCGI;
// 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 (!Netopts && XrdNetAddr::DynDNS() && (time(0) - ddmsg) >= 90)
{Say.Emsg("Pander", "Is hostname", manp, "spelled correctly "
"or just not running?");
ddmsg = time(0);
}
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;
// Verify that this node has the real DNS name if it's IPv6
//
if (!(Link->AddrInfo()->isRegistered())
&& Link->AddrInfo()->isIPType(XrdNetAddrInfo::IPv6))
{char *oldName = strdup(Link->Host());
Say.Emsg("Protocol", oldName, "is missing an IPv6 ptr record; "
"attempting local registration as", manp);
if (!(Link->Register(manp)))
{Say.Emsg("Protocol", oldName,
"registration failed; address mismatch.");
} else {
Say.Emsg("Protocol", oldName,
"is now locally registered as", manp);
}
free(oldName);
}
// 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 */
/******************************************************************************/
namespace
{
char *getAltName(char *sid, char *buff, int blen)
{
char *atsign, *spacec, *retval = 0;
int n;
if (sid)
if ((atsign = index(sid, '@')))
{atsign++;
if ((spacec = index(atsign, ' ')))
{*spacec = 0;
n = strlen(atsign);
if (n > 3 && n < blen)
{strcpy(buff, atsign);
retval = buff;
}
*spacec = ' ';
}
}
return retval;
}
}
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;
// Construct environment for incomming node
//
XrdOucEnv cgiEnv((const char *)Data.envCGI);
// We have this problem hat many times the IPv6 address is missing the ptr
// record in DNS. If this node is IPv6 unregistered and the incomming node
// supplied it's host name then we can attempt to register it locally.
//
if (!(Link->AddrInfo()->isRegistered())
&& Link->AddrInfo()->isIPType(XrdNetAddrInfo::IPv6))
{const char *altName = cgiEnv.Get("myHN");
const char *altType = "stated mapping";
char hBF[256], *oldName = strdup(Link->Host());
if (!altName) {altName = getAltName((char *)Data.SID, hBF, sizeof(hBF));
altType = "inferred mapping";
}
Say.Emsg("Protocol", "DNS lookup for", oldName, "failed; "
"IPv6 ptr record missing!");
if (!altName)
{Say.Emsg("Protocol", oldName, "did not supply a fallback "
"mapping; using IPv6 address.");
} else {
char buff[512];
snprintf(buff, sizeof(buff), "%s -> %s", oldName, altName);
Say.Emsg("Protocol", "Attempting to use", altType, buff);
if (!(Link->Register(altName)))
{Say.Emsg("Protocol", buff, altType,"failed; address mismatch.");
} else {
Say.Emsg("Protocol", oldName,
"is now locally registered as", altName);
}
}
free(oldName);
}
// 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
//
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."));
if (Data.SID)
Say.Emsg("Protocol", myNode->Ident, "system ID:", (const char *)Data.SID);
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;