XRootD
XrdLinkXeq.cc
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1 /******************************************************************************/
2 /* */
3 /* X r d L i n k X e q . c c */
4 /* */
5 /* (c) 2018 by the Board of Trustees of the Leland Stanford, Jr., University */
6 /* Produced by Andrew Hanushevsky for Stanford University under contract */
7 /* DE-AC02-76-SFO0515 with the Department of Energy */
8 /* */
9 /* This file is part of the XRootD software suite. */
10 /* */
11 /* XRootD is free software: you can redistribute it and/or modify it under */
12 /* the terms of the GNU Lesser General Public License as published by the */
13 /* Free Software Foundation, either version 3 of the License, or (at your */
14 /* option) any later version. */
15 /* */
16 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
17 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
18 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
19 /* License for more details. */
20 /* */
21 /* You should have received a copy of the GNU Lesser General Public License */
22 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
23 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
24 /* */
25 /* The copyright holder's institutional names and contributor's names may not */
26 /* be used to endorse or promote products derived from this software without */
27 /* specific prior written permission of the institution or contributor. */
28 /******************************************************************************/
29 
30 #include <limits.h>
31 #include <poll.h>
32 #include <signal.h>
33 #include <cstdio>
34 #include <cstring>
35 #include <unistd.h>
36 #include <sys/types.h>
37 #include <sys/uio.h>
38 
39 #if defined(__linux__) || defined(__GNU__)
40 #include <netinet/tcp.h>
41 #if !defined(TCP_CORK)
42 #undef HAVE_SENDFILE
43 #endif
44 #endif
45 
46 #ifdef HAVE_SENDFILE
47 
48 #if defined(__solaris__) || defined(__linux__) || defined(__GNU__)
49 #include <sys/sendfile.h>
50 #endif
51 
52 #endif
53 
54 #include "XrdSys/XrdSysAtomics.hh"
55 #include "XrdSys/XrdSysError.hh"
56 #include "XrdSys/XrdSysFD.hh"
57 #include "XrdSys/XrdSysPlatform.hh"
58 
59 #include "Xrd/XrdBuffer.hh"
60 #include "Xrd/XrdLink.hh"
61 #include "Xrd/XrdLinkCtl.hh"
62 #include "Xrd/XrdLinkXeq.hh"
63 #include "Xrd/XrdPoll.hh"
64 #include "Xrd/XrdScheduler.hh"
65 #include "Xrd/XrdSendQ.hh"
66 #include "Xrd/XrdTcpMonPin.hh"
67 
68 #define TRACE_IDENT ID
69 #include "Xrd/XrdTrace.hh"
70 
71 /******************************************************************************/
72 /* G l o b a l s */
73 /******************************************************************************/
74 
75 namespace XrdGlobal
76 {
77 extern XrdSysError Log;
78 extern XrdScheduler Sched;
79 extern XrdTlsContext *tlsCtx;
81 extern int devNull;
82  const int maxIOV = XrdSys::getIovMax();
83 };
84 
85 using namespace XrdGlobal;
86 
87 /******************************************************************************/
88 /* S t a t i c s */
89 /******************************************************************************/
90 
91  const char *XrdLinkXeq::TraceID = "LinkXeq";
92 
93  long long XrdLinkXeq::LinkBytesIn = 0;
94  long long XrdLinkXeq::LinkBytesOut = 0;
95  long long XrdLinkXeq::LinkConTime = 0;
96  long long XrdLinkXeq::LinkCountTot = 0;
97  int XrdLinkXeq::LinkCount = 0;
100  int XrdLinkXeq::LinkStalls = 0;
101  int XrdLinkXeq::LinkSfIntr = 0;
103 
104 /******************************************************************************/
105 /* C o n s t r u c t o r */
106 /******************************************************************************/
107 
108 XrdLinkXeq::XrdLinkXeq() : XrdLink(*this), PollInfo((XrdLink &)*this)
109 {
111 }
112 
114 {
115  memcpy(Uname+sizeof(Uname)-7, "anon.0@", 7);
116  strcpy(Lname, "somewhere");
117  ID = &Uname[sizeof(Uname)-5];
118  Comment = ID;
119  sendQ = 0;
120  stallCnt = stallCntTot = 0;
121  tardyCnt = tardyCntTot = 0;
122  SfIntr = 0;
123  isIdle = 0;
125  LockReads= false;
126  KeepFD = false;
127  Protocol = 0;
128  ProtoAlt = 0;
129 
130  LinkInfo.Reset();
131  PollInfo.Zorch();
132  ResetLink();
133 }
134 
135 /******************************************************************************/
136 /* B a c k l o g */
137 /******************************************************************************/
138 
140 {
142 
143 // Return backlog information
144 //
145  return (sendQ ? sendQ->Backlog() : 0);
146 }
147 
148 /******************************************************************************/
149 /* C l i e n t */
150 /******************************************************************************/
151 
152 int XrdLinkXeq::Client(char *nbuf, int nbsz)
153 {
154  int ulen;
155 
156 // Generate full client name
157 //
158  if (nbsz <= 0) return 0;
159  ulen = (Lname - ID);
160  if ((ulen + HNlen) >= nbsz) ulen = 0;
161  else {strncpy(nbuf, ID, ulen);
162  strcpy(nbuf+ulen, HostName);
163  ulen += HNlen;
164  }
165  return ulen;
166 }
167 
168 /******************************************************************************/
169 /* C l o s e */
170 /******************************************************************************/
171 
172 int XrdLinkXeq::Close(bool defer)
174  int csec, fd, rc = 0;
175 
176 // If a defer close is requested, we can close the descriptor but we must
177 // keep the slot number to prevent a new client getting the same fd number.
178 // Linux is peculiar in that any in-progress operations will remain in that
179 // state even after the FD is closed unless there is some activity either on
180 // the connection or an event occurs that causes an operation restart. We
181 // portably solve this problem by issuing a shutdown() on the socket prior
182 // closing it. On most platforms, this informs readers that the connection is
183 // gone (though not on old (i.e. <= 2.3) versions of Linux, sigh). Also, if
184 // nonblocking mode is enabled, we need to do this in a separate thread as
185 // a shutdown may block for a pretty long time if lots\ of messages are queued.
186 // We will ask the SendQ object to schedule the shutdown for us before it
187 // commits suicide.
188 // Note that we can hold the opMutex while we also get the wrMutex.
189 //
190  if (defer)
191  {if (!sendQ) Shutdown(false);
192  else {TRACEI(DEBUG, "Shutdown FD " <<LinkInfo.FD<<" only via SendQ");
193  LinkInfo.InUse++;
194  LinkInfo.FD = -LinkInfo.FD; // Leave poll version untouched!
195  wrMutex.Lock();
196  sendQ->Terminate(this);
197  sendQ = 0;
198  wrMutex.UnLock();
199  }
200  return 0;
201  }
202 
203 // If we got here then this is not a deferred close so we just need to check
204 // if there is a sendq appendage we need to get rid of.
205 //
206  if (sendQ)
207  {wrMutex.Lock();
208  sendQ->Terminate();
209  sendQ = 0;
210  wrMutex.UnLock();
211  }
212 
213 // Multiple protocols may be bound to this link. If it is in use, defer the
214 // actual close until the use count drops to one.
215 //
216  while(LinkInfo.InUse > 1)
217  {opHelper.UnLock();
218  TRACEI(DEBUG, "Close FD "<<LinkInfo.FD <<" deferred, use count="
219  <<LinkInfo.InUse);
220  Serialize();
221  opHelper.Lock(&LinkInfo.opMutex);
222  }
223  LinkInfo.InUse--;
224  Instance = 0;
225 
226 // Add up the statistic for this link
227 //
228  syncStats(&csec);
229 
230 // Cleanup TLS if it is active
231 //
232  if (isTLS) tlsIO.Shutdown();
233 
234 // Clean this link up
235 //
236  if (Protocol) {Protocol->Recycle(this, csec, LinkInfo.Etext); Protocol = 0;}
237  if (ProtoAlt) {ProtoAlt->Recycle(this, csec, LinkInfo.Etext); ProtoAlt = 0;}
238  if (LinkInfo.Etext) {free(LinkInfo.Etext); LinkInfo.Etext = 0;}
239  LinkInfo.InUse = 0;
240 
241 // At this point we can have no lock conflicts, so if someone is waiting for
242 // us to terminate let them know about it. Note that we will get the condvar
243 // mutex while we hold the opMutex. This is the required order! We will also
244 // zero out the pointer to the condvar while holding the opmutex.
245 //
246  if (LinkInfo.KillcvP)
247  {LinkInfo.KillcvP->Lock();
250  LinkInfo.KillcvP = 0;
251  }
252 
253 // Remove ourselves from the poll table and then from the Link table. We may
254 // not hold on to the opMutex when we acquire the LTMutex. However, the link
255 // table needs to be cleaned up prior to actually closing the socket. So, we
256 // do some fancy footwork to prevent multiple closes of this link.
257 //
258  fd = abs(LinkInfo.FD);
259  if (PollInfo.FD > 0)
261  PollInfo.FD = -1;
262  opHelper.UnLock();
263  XrdLinkCtl::Unhook(fd);
264  } else opHelper.UnLock();
265 
266 // Invoke the TCP monitor if it was loaded.
267 //
268  if (TcpMonPin && fd > 2)
269  {XrdTcpMonPin::LinkInfo lnkInfo;
270  lnkInfo.tident = ID;
271  lnkInfo.fd = fd;
272  lnkInfo.consec = csec;
273  lnkInfo.bytesIn = BytesInTot;
274  lnkInfo.bytesOut = BytesOutTot;
275  TcpMonPin->Monitor(Addr, lnkInfo, sizeof(lnkInfo));
276  }
277 
278 // Close the file descriptor if it isn't being shared. Do it as the last
279 // thing because closes and accepts and not interlocked.
280 //
281  if (fd >= 2) {if (KeepFD) rc = 0;
282  else rc = (close(fd) < 0 ? errno : 0);
283  }
284  if (rc) Log.Emsg("Link", rc, "close", ID);
285  return rc;
286 }
287 
288 /******************************************************************************/
289 /* D o I t */
290 /******************************************************************************/
291 
293 {
294  int rc;
295 
296 // The Process() return code tells us what to do:
297 // < 0 -> Stop getting requests,
298 // -EINPROGRESS leave link disabled but otherwise all is well
299 // -n Error, disable and close the link
300 // = 0 -> OK, get next request, if allowed, o/w enable the link
301 // > 0 -> Slow link, stop getting requests and enable the link
302 //
303  if (Protocol)
304  do {rc = Protocol->Process(this);} while (!rc && Sched.canStick());
305  else {Log.Emsg("Link", "Dispatch on closed link", ID);
306  return;
307  }
308 
309 // Either re-enable the link and cycle back waiting for a new request, leave
310 // disabled, or terminate the connection.
311 //
312  if (rc >= 0)
314  else if (rc != -EINPROGRESS) Close();
315 }
316 
317 /******************************************************************************/
318 /* g e t P e e r C e r t s */
319 /******************************************************************************/
320 
322 {
323  return (isTLS ? tlsIO.getCerts(true) : 0);
324 }
325 
326 /******************************************************************************/
327 /* P e e k */
328 /******************************************************************************/
329 
330 int XrdLinkXeq::Peek(char *Buff, int Blen, int timeout)
331 {
332  XrdSysMutexHelper theMutex;
333  struct pollfd polltab = {PollInfo.FD, POLLIN|POLLRDNORM, 0};
334  ssize_t mlen;
335  int retc;
336 
337 // Lock the read mutex if we need to, the helper will unlock it upon exit
338 //
339  if (LockReads) theMutex.Lock(&rdMutex);
340 
341 // Wait until we can actually read something
342 //
343  isIdle = 0;
344  do {retc = poll(&polltab, 1, timeout);} while(retc < 0 && errno == EINTR);
345  if (retc != 1)
346  {if (retc == 0) return 0;
347  return Log.Emsg("Link", -errno, "poll", ID);
348  }
349 
350 // Verify it is safe to read now
351 //
352  if (!(polltab.revents & (POLLIN|POLLRDNORM)))
353  {Log.Emsg("Link", XrdPoll::Poll2Text(polltab.revents), "polling", ID);
354  return -1;
355  }
356 
357 // Do the peek.
358 //
359  do {mlen = recv(LinkInfo.FD, Buff, Blen, MSG_PEEK);}
360  while(mlen < 0 && errno == EINTR);
361 
362 // Return the result
363 //
364  if (mlen >= 0) return int(mlen);
365  Log.Emsg("Link", errno, "peek on", ID);
366  return -1;
367 }
368 
369 /******************************************************************************/
370 /* R e c v */
371 /******************************************************************************/
372 
373 int XrdLinkXeq::Recv(char *Buff, int Blen)
374 {
375  ssize_t rlen;
376 
377 // Note that we will read only as much as is queued. Use Recv() with a
378 // timeout to receive as much data as possible.
379 //
380  if (LockReads) rdMutex.Lock();
381  isIdle = 0;
382  do {rlen = read(LinkInfo.FD, Buff, Blen);} while(rlen < 0 && errno == EINTR);
383  if (rlen > 0) AtomicAdd(BytesIn, rlen);
384  if (LockReads) rdMutex.UnLock();
385 
386  if (rlen >= 0) return int(rlen);
387  if (LinkInfo.FD >= 0) Log.Emsg("Link", errno, "receive from", ID);
388  return -1;
389 }
390 
391 /******************************************************************************/
392 
393 int XrdLinkXeq::Recv(char *Buff, int Blen, int timeout)
394 {
395  XrdSysMutexHelper theMutex;
396  struct pollfd polltab = {PollInfo.FD, POLLIN|POLLRDNORM, 0};
397  ssize_t rlen, totlen = 0;
398  int retc;
399 
400 // Lock the read mutex if we need to, the helper will unlock it upon exit
401 //
402  if (LockReads) theMutex.Lock(&rdMutex);
403 
404 // Wait up to timeout milliseconds for data to arrive
405 //
406  isIdle = 0;
407  while(Blen > 0)
408  {do {retc = poll(&polltab,1,timeout);} while(retc < 0 && errno == EINTR);
409  if (retc != 1)
410  {if (retc == 0)
411  {tardyCnt++;
412  if (totlen)
413  {if ((++stallCnt & 0xff) == 1) TRACEI(DEBUG,"read timed out");
414  AtomicAdd(BytesIn, totlen);
415  }
416  return int(totlen);
417  }
418  return (LinkInfo.FD >= 0 ? Log.Emsg("Link",-errno,"poll",ID) : -1);
419  }
420 
421  // Verify it is safe to read now
422  //
423  if (!(polltab.revents & (POLLIN|POLLRDNORM)))
424  {Log.Emsg("Link", XrdPoll::Poll2Text(polltab.revents),
425  "polling", ID);
426  return -1;
427  }
428 
429  // Read as much data as you can. Note that we will force an error
430  // if we get a zero-length read after poll said it was OK.
431  //
432  do {rlen = recv(LinkInfo.FD, Buff, Blen, 0);}
433  while(rlen < 0 && errno == EINTR);
434  if (rlen <= 0)
435  {if (!rlen) return -ENOMSG;
436  if (LinkInfo.FD > 0) Log.Emsg("Link", -errno, "receive from", ID);
437  return -1;
438  }
439  totlen += rlen; Blen -= rlen; Buff += rlen;
440  }
441 
442  AtomicAdd(BytesIn, totlen);
443  return int(totlen);
444 }
445 
446 /******************************************************************************/
447 
448 int XrdLinkXeq::Recv(const struct iovec *iov, int iocnt, int timeout)
449 {
450  XrdSysMutexHelper theMutex;
451  struct pollfd polltab = {PollInfo.FD, POLLIN|POLLRDNORM, 0};
452  int retc, rlen;
453 
454 // Lock the read mutex if we need to, the helper will unlock it upon exit
455 //
456  if (LockReads) theMutex.Lock(&rdMutex);
457 
458 // Wait up to timeout milliseconds for data to arrive
459 //
460  isIdle = 0;
461  do {retc = poll(&polltab,1,timeout);} while(retc < 0 && errno == EINTR);
462  if (retc != 1)
463  {if (retc == 0)
464  {tardyCnt++;
465  return 0;
466  }
467  return (LinkInfo.FD >= 0 ? Log.Emsg("Link",-errno,"poll",ID) : -1);
468  }
469 
470 // Verify it is safe to read now
471 //
472  if (!(polltab.revents & (POLLIN|POLLRDNORM)))
473  {Log.Emsg("Link", XrdPoll::Poll2Text(polltab.revents), "polling", ID);
474  return -1;
475  }
476 
477 // If the iocnt is within limits then just go ahead and read once.
478 //
479  if (iocnt <= maxIOV)
480  {rlen = RecvIOV(iov, iocnt);
481  if (rlen > 0) {AtomicAdd(BytesIn, rlen);}
482  return rlen;
483  }
484 
485 // We will have to break this up into allowable segments and we need to add up
486 // the bytes in each segment so that we know when to stop reading.
487 //
488  int seglen, segcnt = maxIOV, totlen = 0;
489  do {seglen = 0;
490  for (int i = 0; i < segcnt; i++) seglen += iov[i].iov_len;
491  if ((rlen = RecvIOV(iov, segcnt)) < 0) return rlen;
492  totlen += rlen;
493  if (rlen < seglen) break;
494  iov += segcnt;
495  iocnt -= segcnt;
496  if (iocnt <= maxIOV) segcnt = iocnt;
497  } while(iocnt > 0);
498 
499 // All done
500 //
501  AtomicAdd(BytesIn, totlen);
502  return totlen;
503 }
504 
505 /******************************************************************************/
506 /* R e c v A l l */
507 /******************************************************************************/
508 
509 int XrdLinkXeq::RecvAll(char *Buff, int Blen, int timeout)
510 {
511  struct pollfd polltab = {PollInfo.FD, POLLIN|POLLRDNORM, 0};
512  ssize_t rlen;
513  int retc;
514 
515 // Check if timeout specified. Notice that the timeout is the max we will
516 // for some data. We will wait forever for all the data. Yeah, it's weird.
517 //
518  if (timeout >= 0)
519  {do {retc = poll(&polltab,1,timeout);} while(retc < 0 && errno == EINTR);
520  if (retc != 1)
521  {if (!retc) return -ETIMEDOUT;
522  Log.Emsg("Link",errno,"poll",ID);
523  return -1;
524  }
525  if (!(polltab.revents & (POLLIN|POLLRDNORM)))
526  {Log.Emsg("Link",XrdPoll::Poll2Text(polltab.revents),"polling",ID);
527  return -1;
528  }
529  }
530 
531 // Note that we will block until we receive all he bytes.
532 //
533  if (LockReads) rdMutex.Lock();
534  isIdle = 0;
535  do {rlen = recv(LinkInfo.FD, Buff, Blen, MSG_WAITALL);}
536  while(rlen < 0 && errno == EINTR);
537  if (rlen > 0) AtomicAdd(BytesIn, rlen);
538  if (LockReads) rdMutex.UnLock();
539 
540  if (int(rlen) == Blen) return Blen;
541  if (!rlen) {TRACEI(DEBUG, "No RecvAll() data; errno=" <<errno);}
542  else if (rlen > 0) Log.Emsg("RecvAll", "Premature end from", ID);
543  else if (LinkInfo.FD >= 0) Log.Emsg("Link", errno, "receive from", ID);
544  return -1;
545 }
546 
547 /******************************************************************************/
548 /* Protected: R e c v I O V */
549 /******************************************************************************/
550 
551 int XrdLinkXeq::RecvIOV(const struct iovec *iov, int iocnt)
552 {
553  ssize_t retc = 0;
554 
555 // Read the data in. On some version of Unix (e.g., Linux) a readv() may
556 // end at any time without reading all the bytes when directed to a socket.
557 // We always return the number bytes read (or an error). The caller needs to
558 // restart the read at the appropriate place in the iovec when more data arrives.
559 //
560  do {retc = readv(LinkInfo.FD, iov, iocnt);}
561  while(retc < 0 && errno == EINTR);
562 
563 // Check how we completed
564 //
565  if (retc < 0) Log.Emsg("Link", errno, "receive from", ID);
566  return retc;
567 }
568 
569 /******************************************************************************/
570 /* R e g i s t e r */
571 /******************************************************************************/
572 
573 bool XrdLinkXeq::Register(const char *hName)
574 {
575 
576 // Make appropriate changes here
577 //
578  if (HostName) free(HostName);
579  HostName = strdup(hName);
580  strlcpy(Lname, hName, sizeof(Lname));
581  return true;
582 }
583 
584 /******************************************************************************/
585 /* S e n d */
586 /******************************************************************************/
587 
588 int XrdLinkXeq::Send(const char *Buff, int Blen)
589 {
590  ssize_t retc = 0, bytesleft = Blen;
591 
592 // Get a lock
593 //
594  wrMutex.Lock();
595  isIdle = 0;
596  AtomicAdd(BytesOut, Blen);
597 
598 // Do non-blocking writes if we are setup to do so.
599 //
600  if (sendQ)
601  {retc = sendQ->Send(Buff, Blen);
602  wrMutex.UnLock();
603  return retc;
604  }
605 
606 // Write the data out
607 //
608  while(bytesleft)
609  {if ((retc = write(LinkInfo.FD, Buff, bytesleft)) < 0)
610  {if (errno == EINTR) continue;
611  else break;
612  }
613  bytesleft -= retc; Buff += retc;
614  }
615 
616 // All done
617 //
618  wrMutex.UnLock();
619  if (retc >= 0) return Blen;
620  Log.Emsg("Link", errno, "send to", ID);
621  return -1;
622 }
623 
624 /******************************************************************************/
625 
626 int XrdLinkXeq::Send(const struct iovec *iov, int iocnt, int bytes)
627 {
628  int retc;
629 
630 // Get a lock and assume we will be successful (statistically we are)
631 //
632  wrMutex.Lock();
633  isIdle = 0;
634  AtomicAdd(BytesOut, bytes);
635 
636 // Do non-blocking writes if we are setup to do so.
637 //
638  if (sendQ)
639  {retc = sendQ->Send(iov, iocnt, bytes);
640  wrMutex.UnLock();
641  return retc;
642  }
643 
644 // If the iocnt is within limits then just go ahead and write this out
645 //
646  if (iocnt <= maxIOV)
647  {retc = SendIOV(iov, iocnt, bytes);
648  wrMutex.UnLock();
649  return retc;
650  }
651 
652 // We will have to break this up into allowable segments
653 //
654  int seglen, segcnt = maxIOV, iolen = 0;
655  do {seglen = 0;
656  for (int i = 0; i < segcnt; i++) seglen += iov[i].iov_len;
657  if ((retc = SendIOV(iov, segcnt, seglen)) < 0)
658  {wrMutex.UnLock();
659  return retc;
660  }
661  iolen += retc;
662  iov += segcnt;
663  iocnt -= segcnt;
664  if (iocnt <= maxIOV) segcnt = iocnt;
665  } while(iocnt > 0);
666 
667 // All done
668 //
669  wrMutex.UnLock();
670  return iolen;
671 }
672 
673 /******************************************************************************/
674 
675 int XrdLinkXeq::Send(const sfVec *sfP, int sfN)
676 {
677 #if !defined(HAVE_SENDFILE)
678 
679  return -1;
680 
681 #elif defined(__solaris__)
682 
683  sendfilevec_t vecSF[XrdOucSFVec::sfMax], *vecSFP = vecSF;
684  size_t xframt, totamt, bytes = 0;
685  ssize_t retc;
686  int i = 0;
687 
688 // Construct the sendfilev() vector
689 //
690  for (i = 0; i < sfN; sfP++, i++)
691  {if (sfP->fdnum < 0)
692  {vecSF[i].sfv_fd = SFV_FD_SELF;
693  vecSF[i].sfv_off = (off_t)sfP->buffer;
694  } else {
695  vecSF[i].sfv_fd = sfP->fdnum;
696  vecSF[i].sfv_off = sfP->offset;
697  }
698  vecSF[i].sfv_flag = 0;
699  vecSF[i].sfv_len = sfP->sendsz;
700  bytes += sfP->sendsz;
701  }
702  totamt = bytes;
703 
704 // Lock the link, issue sendfilev(), and unlock the link. The documentation
705 // is very spotty and inconsistent. We can only retry this operation under
706 // very limited conditions.
707 //
708  wrMutex.Lock();
709  isIdle = 0;
710 do{retc = sendfilev(LinkInfo.FD, vecSFP, sfN, &xframt);
711 
712 // Check if all went well and return if so (usual case)
713 //
714  if (xframt == bytes)
715  {AtomicAdd(BytesOut, bytes);
716  wrMutex.UnLock();
717  return totamt;
718  }
719 
720 // The only one we will recover from is EINTR. We cannot legally get EAGAIN.
721 //
722  if (retc < 0 && errno != EINTR) break;
723 
724 // Try to resume the transfer
725 //
726  if (xframt > 0)
727  {AtomicAdd(BytesOut, xframt); bytes -= xframt; SfIntr++;
728  while(xframt > 0 && sfN)
729  {if ((ssize_t)xframt < (ssize_t)vecSFP->sfv_len)
730  {vecSFP->sfv_off += xframt; vecSFP->sfv_len -= xframt; break;}
731  xframt -= vecSFP->sfv_len; vecSFP++; sfN--;
732  }
733  }
734  } while(sfN > 0);
735 
736 // See if we can recover without destroying the connection
737 //
738  retc = (retc < 0 ? errno : ECANCELED);
739  wrMutex.UnLock();
740  Log.Emsg("Link", retc, "send file to", ID);
741  return -1;
742 
743 #elif defined(__linux__) || defined(__GNU__)
744 
745  static const int setON = 1, setOFF = 0;
746  ssize_t retc = 0, bytesleft;
747  off_t myOffset;
748  int i, xfrbytes = 0, uncork = 1, xIntr = 0;
749 
750 // lock the link
751 //
752  wrMutex.Lock();
753  isIdle = 0;
754 
755 // In linux we need to cork the socket. On permanent errors we do not uncork
756 // the socket because it will be closed in short order.
757 //
758  if (setsockopt(PollInfo.FD, SOL_TCP, TCP_CORK, &setON, sizeof(setON)) < 0)
759  {Log.Emsg("Link", errno, "cork socket for", ID);
760  uncork = 0; sfOK = 0;
761  }
762 
763 // Send the header first
764 //
765  for (i = 0; i < sfN; sfP++, i++)
766  {if (sfP->fdnum < 0) retc = sendData(sfP->buffer, sfP->sendsz);
767  else {myOffset = sfP->offset; bytesleft = sfP->sendsz;
768  while(bytesleft
769  && (retc=sendfile(LinkInfo.FD,sfP->fdnum,&myOffset,bytesleft)) > 0)
770  {bytesleft -= retc; xIntr++;}
771  }
772  if (retc < 0 && errno == EINTR) continue;
773  if (retc <= 0) break;
774  xfrbytes += sfP->sendsz;
775  }
776 
777 // Diagnose any sendfile errors
778 //
779  if (retc <= 0)
780  {if (retc == 0) errno = ECANCELED;
781  wrMutex.UnLock();
782  Log.Emsg("Link", errno, "send file to", ID);
783  return -1;
784  }
785 
786 // Now uncork the socket
787 //
788  if (uncork
789  && setsockopt(PollInfo.FD, SOL_TCP, TCP_CORK, &setOFF, sizeof(setOFF)) < 0)
790  Log.Emsg("Link", errno, "uncork socket for", ID);
791 
792 // All done
793 //
794  if (xIntr > sfN) SfIntr += (xIntr - sfN);
795  AtomicAdd(BytesOut, xfrbytes);
796  wrMutex.UnLock();
797  return xfrbytes;
798 
799 #else
800 
801  return -1;
802 
803 #endif
804 }
805 
806 /******************************************************************************/
807 /* Protected: s e n d D a t a */
808 /******************************************************************************/
809 
810 int XrdLinkXeq::sendData(const char *Buff, int Blen)
811 {
812  ssize_t retc = 0, bytesleft = Blen;
813 
814 // Write the data out
815 //
816  while(bytesleft)
817  {if ((retc = write(LinkInfo.FD, Buff, bytesleft)) < 0)
818  {if (errno == EINTR) continue;
819  else break;
820  }
821  bytesleft -= retc; Buff += retc;
822  }
823 
824 // All done
825 //
826  return retc;
827 }
828 
829 /******************************************************************************/
830 /* Protected: S e n d I O V */
831 /******************************************************************************/
832 
833 int XrdLinkXeq::SendIOV(const struct iovec *iov, int iocnt, int bytes)
834 {
835  ssize_t bytesleft, n, retc = 0;
836  const char *Buff;
837 
838 // Write the data out. On some version of Unix (e.g., Linux) a writev() may
839 // end at any time without writing all the bytes when directed to a socket.
840 // So, we attempt to resume the writev() using a combination of write() and
841 // a writev() continuation. This approach slowly converts a writev() to a
842 // series of writes if need be. We must do this inline because we must hold
843 // the lock until all the bytes are written or an error occurs.
844 //
845  bytesleft = static_cast<ssize_t>(bytes);
846  while(bytesleft)
847  {do {retc = writev(LinkInfo.FD, iov, iocnt);}
848  while(retc < 0 && errno == EINTR);
849  if (retc >= bytesleft || retc < 0) break;
850  bytesleft -= retc;
851  while(retc >= (n = static_cast<ssize_t>(iov->iov_len)))
852  {retc -= n; iov++; iocnt--;}
853  Buff = (const char *)iov->iov_base + retc; n -= retc; iov++; iocnt--;
854  while(n) {if ((retc = write(LinkInfo.FD, Buff, n)) < 0)
855  {if (errno == EINTR) continue;
856  else break;
857  }
858  n -= retc; Buff += retc; bytesleft -= retc;
859  }
860  if (retc < 0 || iocnt < 1) break;
861  }
862 
863 // All done
864 //
865  if (retc >= 0) return bytes;
866  Log.Emsg("Link", errno, "send to", ID);
867  return -1;
868 }
869 
870 /******************************************************************************/
871 /* s e t I D */
872 /******************************************************************************/
873 
874 void XrdLinkXeq::setID(const char *userid, int procid)
875 {
876  char buff[sizeof(Uname)], *bp, *sp;
877  int ulen;
878 
879  snprintf(buff, sizeof(buff), "%s.%d:%d", userid, procid, PollInfo.FD);
880  ulen = strlen(buff);
881  sp = buff + ulen - 1;
882  bp = &Uname[sizeof(Uname)-1];
883  if (ulen > (int)sizeof(Uname)) ulen = sizeof(Uname);
884  *bp = '@'; bp--;
885  while(ulen--) {*bp = *sp; bp--; sp--;}
886  ID = bp+1;
887  Comment = (const char *)ID;
888 
889 // Update the ID in the TLS socket if enabled
890 //
891  if (isTLS) tlsIO.SetTraceID(ID);
892 }
893 
894 /******************************************************************************/
895 /* s e t N B */
896 /******************************************************************************/
897 
899 {
900 // We don't support non-blocking output except for Linux at the moment
901 //
902 #if !defined(__linux__)
903  return false;
904 #else
905 // Trace this request
906 //
907  TRACEI(DEBUG,"enabling non-blocking output");
908 
909 // If we don't already have a sendQ object get one. This is a one-time call
910 // so to optimize checking if this object exists we also get the opMutex.'
911 //
913  if (!sendQ)
914  {wrMutex.Lock();
915  sendQ = new XrdSendQ(*this, wrMutex);
916  wrMutex.UnLock();
917  }
919  return true;
920 #endif
921 }
922 
923 /******************************************************************************/
924 /* s e t P r o t o c o l */
925 /******************************************************************************/
926 
928 {
929 
930 // Set new protocol.
931 //
933  XrdProtocol *op = Protocol;
934  if (push) ProtoAlt = Protocol;
935  Protocol = pp;
937  return op;
938 }
939 
940 /******************************************************************************/
941 /* s e t P r o t N a m e */
942 /******************************************************************************/
943 
944 void XrdLinkXeq::setProtName(const char *name)
945 {
946 
947 // Set the protocol name.
948 //
950  Addr.SetDialect(name);
952 }
953 
954 /******************************************************************************/
955 /* s e t T L S */
956 /******************************************************************************/
957 
958 bool XrdLinkXeq::setTLS(bool enable, XrdTlsContext *ctx)
959 { //???
960 // static const XrdTlsConnection::RW_Mode rwMode=XrdTlsConnection::TLS_RNB_WBL;
963  const char *eNote;
964  XrdTls::RC rc;
965 
966 // If we are already in a compatible mode, we are done
967 //
968 
969  if (isTLS == enable) return true;
970 
971 // If this is a shutdown, then do it now.
972 //
973  if (!enable)
974  {tlsIO.Shutdown();
975  isTLS = enable;
976  Addr.SetTLS(enable);
977  return true;
978  }
979 // We want to initialize TLS, do so now.
980 //
981  if (!ctx) ctx = tlsCtx;
982  eNote = tlsIO.Init(*ctx, PollInfo.FD, rwMode, hsMode, false, false, ID);
983 
984 // Check for errors
985 //
986  if (eNote)
987  {char buff[1024];
988  snprintf(buff, sizeof(buff), "Unable to enable tls for %s;", ID);
989  Log.Emsg("LinkXeq", buff, eNote);
990  return false;
991  }
992 
993 // Now we need to accept this TLS connection
994 //
995  std::string eMsg;
996  rc = tlsIO.Accept(&eMsg);
997 
998 // Diagnose return state
999 //
1000  if (rc != XrdTls::TLS_AOK) Log.Emsg("LinkXeq", eMsg.c_str());
1001  else {isTLS = enable;
1002  Addr.SetTLS(enable);
1003  Log.Emsg("LinkXeq", ID, "connection upgraded to", verTLS());
1004  }
1005  return rc == XrdTls::TLS_AOK;
1006 }
1007 
1008 /******************************************************************************/
1009 /* S F E r r o r */
1010 /******************************************************************************/
1011 
1013 {
1014  Log.Emsg("TLS", rc, "send file to", ID);
1015  return -1;
1016 }
1017 
1018 /******************************************************************************/
1019 /* S h u t d o w n */
1020 /******************************************************************************/
1021 
1022 void XrdLinkXeq::Shutdown(bool getLock)
1023 {
1024  int temp;
1025 
1026 // Trace the entry
1027 //
1028  TRACEI(DEBUG, (getLock ? "Async" : "Sync") <<" link shutdown in progress");
1029 
1030 // Get the lock if we need too (external entry via another thread)
1031 //
1032  if (getLock) LinkInfo.opMutex.Lock();
1033 
1034 // If there is something to do, do it now
1035 //
1036  temp = Instance; Instance = 0;
1037  if (!KeepFD)
1038  {shutdown(PollInfo.FD, SHUT_RDWR);
1039  if (dup2(devNull, PollInfo.FD) < 0)
1040  {Instance = temp;
1041  Log.Emsg("Link", errno, "shutdown FD for", ID);
1042  }
1043  }
1044 
1045 // All done
1046 //
1047  if (getLock) LinkInfo.opMutex.UnLock();
1048 }
1049 
1050 /******************************************************************************/
1051 /* S t a t s */
1052 /******************************************************************************/
1053 
1054 int XrdLinkXeq::Stats(char *buff, int blen, bool do_sync)
1055 {
1056  static const char statfmt[] = "<stats id=\"link\"><num>%d</num>"
1057  "<maxn>%d</maxn><tot>%lld</tot><in>%lld</in><out>%lld</out>"
1058  "<ctime>%lld</ctime><tmo>%d</tmo><stall>%d</stall>"
1059  "<sfps>%d</sfps></stats>";
1060  int i;
1061 
1062 // Check if actual length wanted
1063 //
1064  if (!buff) return sizeof(statfmt)+17*6;
1065 
1066 // We must synchronize the statistical counters
1067 //
1068  if (do_sync) XrdLinkCtl::SyncAll();
1069 
1070 // Obtain lock on the stats area and format it
1071 //
1073  i = snprintf(buff, blen, statfmt, AtomicGet(LinkCount),
1083  return i;
1084 }
1085 
1086 /******************************************************************************/
1087 /* s y n c S t a t s */
1088 /******************************************************************************/
1089 
1090 void XrdLinkXeq::syncStats(int *ctime)
1091 {
1092  long long tmpLL;
1093  int tmpI4;
1094 
1095 // If this is dynamic, get the opMutex lock
1096 //
1097  if (!ctime) LinkInfo.opMutex.Lock();
1098 
1099 // Either the caller has the opMutex or this is called out of close. In either
1100 // case, we need to get the read and write mutexes; each followed by the stats
1101 // mutex. This order is important because we should not hold the stats mutex
1102 // for very long and the r/w mutexes may take a long time to acquire. If we
1103 // must maintain the link count we need to actually acquire the stats mutex as
1104 // we will be doing compound operations. Atomics are still used to keep other
1105 // threads from seeing partial results.
1106 //
1107  AtomicBeg(rdMutex);
1108 
1109  if (ctime)
1110  {*ctime = time(0) - LinkInfo.conTime;
1111  AtomicAdd(LinkConTime, *ctime);
1112  statsMutex.Lock();
1113  if (LinkCount > 0) AtomicDec(LinkCount);
1114  statsMutex.UnLock();
1115  }
1116 
1118 
1119  tmpLL = AtomicFAZ(BytesIn);
1120  AtomicAdd(LinkBytesIn, tmpLL); AtomicAdd(BytesInTot, tmpLL);
1121  tmpI4 = AtomicFAZ(tardyCnt);
1122  AtomicAdd(LinkTimeOuts, tmpI4); AtomicAdd(tardyCntTot, tmpI4);
1123  tmpI4 = AtomicFAZ(stallCnt);
1124  AtomicAdd(LinkStalls, tmpI4); AtomicAdd(stallCntTot, tmpI4);
1126 
1128  tmpLL = AtomicFAZ(BytesOut);
1129  AtomicAdd(LinkBytesOut, tmpLL); AtomicAdd(BytesOutTot, tmpLL);
1130  tmpI4 = AtomicFAZ(SfIntr);
1131  AtomicAdd(LinkSfIntr, tmpI4);
1133 
1134 // Make sure the protocol updates it's statistics as well
1135 //
1136  if (Protocol) Protocol->Stats(0, 0, 1);
1137 
1138 // All done
1139 //
1140  if (!ctime) LinkInfo.opMutex.UnLock();
1141 }
1142 
1143 /******************************************************************************/
1144 /* Protected: T L S _ E r r o r */
1145 /******************************************************************************/
1146 
1147 int XrdLinkXeq::TLS_Error(const char *act, XrdTls::RC rc)
1148 {
1149  std::string reason = XrdTls::RC2Text(rc);
1150  char msg[512];
1151 
1152  snprintf(msg, sizeof(msg), "Unable to %s %s;", act, ID);
1153  Log.Emsg("TLS", msg, reason.c_str());
1154  return -1;
1155 }
1156 
1157 /******************************************************************************/
1158 /* T L S _ P e e k */
1159 /******************************************************************************/
1160 
1161 int XrdLinkXeq::TLS_Peek(char *Buff, int Blen, int timeout)
1162 {
1163  XrdSysMutexHelper theMutex;
1164  XrdTls::RC retc;
1165  int rc, rlen;
1166 
1167 // Lock the read mutex if we need to, the helper will unlock it upon exit
1168 //
1169  if (LockReads) theMutex.Lock(&rdMutex);
1170 
1171 // Wait until we can actually read something
1172 //
1173  isIdle = 0;
1174  if (timeout)
1175  {rc = Wait4Data(timeout);
1176  if (rc < 1) return rc;
1177  }
1178 
1179 // Do the peek and if sucessful, the number of bytes available.
1180 //
1181  retc = tlsIO.Peek(Buff, Blen, rlen);
1182  if (retc == XrdTls::TLS_AOK) return rlen;
1183 
1184 // Dianose the TLS error and return failure
1185 //
1186  return TLS_Error("peek on", retc);
1187 }
1188 
1189 /******************************************************************************/
1190 /* T L S _ R e c v */
1191 /******************************************************************************/
1192 
1193 int XrdLinkXeq::TLS_Recv(char *Buff, int Blen)
1194 {
1195  XrdSysMutexHelper theMutex;
1196  XrdTls::RC retc;
1197  int rlen;
1198 
1199 // Lock the read mutex if we need to, the helper will unlock it upon exit
1200 //
1201  if (LockReads) theMutex.Lock(&rdMutex);
1202 
1203 // Note that we will read only as much as is queued. Use Recv() with a
1204 // timeout to receive as much data as possible.
1205 //
1206  isIdle = 0;
1207  retc = tlsIO.Read(Buff, Blen, rlen);
1208  if (retc != XrdTls::TLS_AOK) return TLS_Error("receive from", retc);
1209  if (rlen > 0) AtomicAdd(BytesIn, rlen);
1210  return rlen;
1211 }
1212 
1213 /******************************************************************************/
1214 
1215 int XrdLinkXeq::TLS_Recv(char *Buff, int Blen, int timeout, bool havelock)
1216 {
1217  XrdSysMutexHelper theMutex;
1218  XrdTls::RC retc;
1219  int pend, rlen, totlen = 0;
1220 
1221 // Lock the read mutex if we need to, the helper will unlock it upon exit
1222 //
1223  if (LockReads && !havelock) theMutex.Lock(&rdMutex);
1224 
1225 // Wait up to timeout milliseconds for data to arrive
1226 //
1227  isIdle = 0;
1228  while(Blen > 0)
1229  {pend = tlsIO.Pending(true);
1230  if (!pend) pend = Wait4Data(timeout);
1231  if (pend < 1)
1232  {if (pend < 0) return -1;
1233  tardyCnt++;
1234  if (totlen)
1235  {if ((++stallCnt & 0xff) == 1) TRACEI(DEBUG,"read timed out");
1236  AtomicAdd(BytesIn, totlen);
1237  }
1238  return totlen;
1239  }
1240 
1241  // Read as much data as you can. Note that we will force an error
1242  // if we get a zero-length read after poll said it was OK. However,
1243  // if we never read anything, then we simply return -ENOMSG to avoid
1244  // generating a "read link error" as clearly there was a hangup.
1245  //
1246  retc = tlsIO.Read(Buff, Blen, rlen);
1247  if (retc != XrdTls::TLS_AOK)
1248  {if (!totlen) return -ENOMSG;
1249  AtomicAdd(BytesIn, totlen);
1250  return TLS_Error("receive from", retc);
1251  }
1252  if (rlen <= 0) break;
1253  totlen += rlen; Blen -= rlen; Buff += rlen;
1254  }
1255 
1256  AtomicAdd(BytesIn, totlen);
1257  return totlen;
1258 }
1259 
1260 /******************************************************************************/
1261 
1262 int XrdLinkXeq::TLS_Recv(const struct iovec *iov, int iocnt, int timeout)
1263 {
1264  XrdSysMutexHelper theMutex;
1265  char *Buff;
1266  int Blen, rlen, totlen = 0;
1267 
1268 // Lock the read mutex if we need to, the helper will unlock it upon exit
1269 //
1270  if (LockReads) theMutex.Lock(&rdMutex);
1271 
1272 // Individually process each element until we can't read any more
1273 //
1274  isIdle = 0;
1275  for (int i = 0; i < iocnt; i++)
1276  {Buff = (char *)iov[i].iov_base;
1277  Blen = iov[i].iov_len;
1278  rlen = TLS_Recv(Buff, Blen, timeout, true);
1279  if (rlen <= 0) break;
1280  totlen += rlen;
1281  if (rlen < Blen) break;
1282  }
1283 
1284  if (totlen) {AtomicAdd(BytesIn, totlen);}
1285  return totlen;
1286 }
1287 
1288 /******************************************************************************/
1289 /* T L S _ R e c v A l l */
1290 /******************************************************************************/
1291 
1292 int XrdLinkXeq::TLS_RecvAll(char *Buff, int Blen, int timeout)
1293 {
1294  int retc;
1295 
1296 // Check if timeout specified. Notice that the timeout is the max we will
1297 // wait for some data. We will wait forever for all the data. Yeah, it's weird.
1298 //
1299  if (timeout >= 0)
1300  {retc = tlsIO.Pending(true);
1301  if (!retc) retc = Wait4Data(timeout);
1302  if (retc < 1) return (retc ? -1 : -ETIMEDOUT);
1303  }
1304 
1305 // Note that we will block until we receive all the bytes.
1306 //
1307  return TLS_Recv(Buff, Blen, -1);
1308 }
1309 
1310 /******************************************************************************/
1311 /* T L S _ S e n d */
1312 /******************************************************************************/
1313 
1314 int XrdLinkXeq::TLS_Send(const char *Buff, int Blen)
1315 {
1317  ssize_t bytesleft = Blen;
1318  XrdTls::RC retc;
1319  int byteswritten;
1320 
1321 // Prepare to send
1322 //
1323  isIdle = 0;
1324  AtomicAdd(BytesOut, Blen);
1325 
1326 // Do non-blocking writes if we are setup to do so.
1327 //
1328  if (sendQ) return sendQ->Send(Buff, Blen);
1329 
1330 // Write the data out
1331 //
1332  while(bytesleft)
1333  {retc = tlsIO.Write(Buff, bytesleft, byteswritten);
1334  if (retc != XrdTls::TLS_AOK) return TLS_Error("send to", retc);
1335  bytesleft -= byteswritten; Buff += byteswritten;
1336  }
1337 
1338 // All done
1339 //
1340  return Blen;
1341 }
1342 
1343 /******************************************************************************/
1344 
1345 int XrdLinkXeq::TLS_Send(const struct iovec *iov, int iocnt, int bytes)
1346 {
1348  XrdTls::RC retc;
1349  int byteswritten;
1350 
1351 // Get a lock and assume we will be successful (statistically we are). Note
1352 // that the calling interface gauranteed bytes are not zero.
1353 //
1354  isIdle = 0;
1355  AtomicAdd(BytesOut, bytes);
1356 
1357 // Do non-blocking writes if we are setup to do so.
1358 //
1359  if (sendQ) return sendQ->Send(iov, iocnt, bytes);
1360 
1361 // Write the data out.
1362 //
1363  for (int i = 0; i < iocnt; i++)
1364  {ssize_t bytesleft = iov[i].iov_len;
1365  char *Buff = (char *)iov[i].iov_base;
1366  while(bytesleft)
1367  {retc = tlsIO.Write(Buff, bytesleft, byteswritten);
1368  if (retc != XrdTls::TLS_AOK) return TLS_Error("send to", retc);
1369  bytesleft -= byteswritten; Buff += byteswritten;
1370  }
1371  }
1372 
1373 // All done
1374 //
1375  return bytes;
1376 }
1377 
1378 /******************************************************************************/
1379 
1380 int XrdLinkXeq::TLS_Send(const sfVec *sfP, int sfN)
1381 {
1383  int bytes, buffsz, fileFD, retc;
1384  off_t offset;
1385  ssize_t totamt = 0;
1386  char myBuff[65536];
1387 
1388 // Convert the sendfile to a regular send. The conversion is not particularly
1389 // fast and caller are advised to avoid using sendfile on TLS connections.
1390 //
1391  isIdle = 0;
1392  for (int i = 0; i < sfN; sfP++, i++)
1393  {if (!(bytes = sfP->sendsz)) continue;
1394  totamt += bytes;
1395  if (sfP->fdnum < 0)
1396  {if (!TLS_Write(sfP->buffer, bytes)) return -1;
1397  continue;
1398  }
1399  offset = sfP->offset;
1400  fileFD = sfP->fdnum;
1401  buffsz = (bytes < (int)sizeof(myBuff) ? bytes : sizeof(myBuff));
1402  do {do {retc = pread(fileFD, myBuff, buffsz, offset);}
1403  while(retc < 0 && errno == EINTR);
1404  if (retc < 0) return SFError(errno);
1405  if (!retc) break;
1406  if (!TLS_Write(myBuff, buffsz)) return -1;
1407  offset += buffsz; bytes -= buffsz; totamt += retc;
1408  } while(bytes > 0);
1409  }
1410 
1411 // We are done
1412 //
1413  AtomicAdd(BytesOut, totamt);
1414  return totamt;
1415 }
1416 
1417 /******************************************************************************/
1418 /* Protected: T L S _ W r i t e */
1419 /******************************************************************************/
1420 
1421 bool XrdLinkXeq::TLS_Write(const char *Buff, int Blen)
1422 {
1423  XrdTls::RC retc;
1424  int byteswritten;
1425 
1426 // Write the data out
1427 //
1428  while(Blen)
1429  {retc = tlsIO.Write(Buff, Blen, byteswritten);
1430  if (retc != XrdTls::TLS_AOK)
1431  {TLS_Error("write to", retc);
1432  return false;
1433  }
1434  Blen -= byteswritten; Buff += byteswritten;
1435  }
1436 
1437 // All done
1438 //
1439  return true;
1440 }
1441 
1442 /******************************************************************************/
1443 /* v e r T L S */
1444 /******************************************************************************/
1445 
1446 const char *XrdLinkXeq::verTLS()
1447 {
1448  return tlsIO.Version();
1449 }
#define DEBUG(x)
Definition: XrdBwmTrace.hh:54
ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset)
ssize_t readv(int fildes, const struct iovec *iov, int iovcnt)
ssize_t write(int fildes, const void *buf, size_t nbyte)
ssize_t writev(int fildes, const struct iovec *iov, int iovcnt)
ssize_t read(int fildes, void *buf, size_t nbyte)
#define close(a)
Definition: XrdPosix.hh:43
#define eMsg(x)
#define AtomicFAZ(x)
#define AtomicBeg(Mtx)
#define AtomicDec(x)
#define AtomicGet(x)
#define AtomicEnd(Mtx)
#define AtomicAdd(x, y)
size_t strlcpy(char *dst, const char *src, size_t sz)
#define TRACEI(act, x)
Definition: XrdTrace.hh:66
const char * Comment
Definition: XrdJob.hh:47
static void SyncAll()
Synchronize statustics for ll links.
Definition: XrdLinkCtl.cc:374
static void Unhook(int fd)
Unhook a link from the active table of links.
Definition: XrdLinkCtl.cc:392
time_t conTime
Definition: XrdLinkInfo.hh:44
void Reset()
Definition: XrdLinkInfo.hh:52
char * Etext
Definition: XrdLinkInfo.hh:45
XrdSysRecMutex opMutex
Definition: XrdLinkInfo.hh:46
XrdSysCondVar * KillcvP
Definition: XrdLinkInfo.hh:42
static const char * TraceID
Definition: XrdLinkXeq.hh:157
int TLS_Send(const char *Buff, int Blen)
Definition: XrdLinkXeq.cc:1314
long long BytesOut
Definition: XrdLinkXeq.hh:172
int TLS_Error(const char *act, XrdTls::RC rc)
Definition: XrdLinkXeq.cc:1147
int TLS_Peek(char *Buff, int Blen, int timeout)
Definition: XrdLinkXeq.cc:1161
int stallCntTot
Definition: XrdLinkXeq.hh:175
int Client(char *buff, int blen)
Definition: XrdLinkXeq.cc:152
char Uname[24]
Definition: XrdLinkXeq.hh:200
XrdTlsPeerCerts * getPeerCerts()
Definition: XrdLinkXeq.cc:321
static int LinkCountMax
Definition: XrdLinkXeq.hh:166
XrdLinkInfo LinkInfo
Definition: XrdLinkXeq.hh:144
XrdProtocol * ProtoAlt
Definition: XrdLinkXeq.hh:184
int Close(bool defer=false)
Definition: XrdLinkXeq.cc:172
XrdNetAddr Addr
Definition: XrdLinkXeq.hh:192
int TLS_Recv(char *Buff, int Blen)
Definition: XrdLinkXeq.cc:1193
int sendData(const char *Buff, int Blen)
Definition: XrdLinkXeq.cc:810
long long BytesInTot
Definition: XrdLinkXeq.hh:171
bool TLS_Write(const char *Buff, int Blen)
Definition: XrdLinkXeq.cc:1421
int SendIOV(const struct iovec *iov, int iocnt, int bytes)
Definition: XrdLinkXeq.cc:833
XrdProtocol * setProtocol(XrdProtocol *pp, bool push)
Definition: XrdLinkXeq.cc:927
static long long LinkCountTot
Definition: XrdLinkXeq.hh:164
long long BytesOutTot
Definition: XrdLinkXeq.hh:173
void Shutdown(bool getLock)
Definition: XrdLinkXeq.cc:1022
int Peek(char *buff, int blen, int timeout=-1)
Definition: XrdLinkXeq.cc:330
static int LinkCount
Definition: XrdLinkXeq.hh:165
void Reset()
Definition: XrdLinkXeq.cc:113
int Backlog()
Definition: XrdLinkXeq.cc:139
XrdSysMutex wrMutex
Definition: XrdLinkXeq.hh:194
static int Stats(char *buff, int blen, bool do_sync=false)
Definition: XrdLinkXeq.cc:1054
XrdSendQ * sendQ
Definition: XrdLinkXeq.hh:195
XrdPollInfo PollInfo
Definition: XrdLinkXeq.hh:145
void setID(const char *userid, int procid)
Definition: XrdLinkXeq.cc:874
bool LockReads
Definition: XrdLinkXeq.hh:197
int Recv(char *buff, int blen)
Definition: XrdLinkXeq.cc:373
static long long LinkBytesIn
Definition: XrdLinkXeq.hh:161
int TLS_RecvAll(char *Buff, int Blen, int timeout)
Definition: XrdLinkXeq.cc:1292
int SFError(int rc)
Definition: XrdLinkXeq.cc:1012
long long BytesIn
Definition: XrdLinkXeq.hh:170
int tardyCntTot
Definition: XrdLinkXeq.hh:177
int Send(const char *buff, int blen)
Definition: XrdLinkXeq.cc:588
XrdSysMutex rdMutex
Definition: XrdLinkXeq.hh:193
const char * verTLS()
Definition: XrdLinkXeq.cc:1446
bool setNB()
Definition: XrdLinkXeq.cc:898
int RecvIOV(const struct iovec *iov, int iocnt)
Definition: XrdLinkXeq.cc:551
char Lname[256]
Definition: XrdLinkXeq.hh:201
static long long LinkConTime
Definition: XrdLinkXeq.hh:163
static int LinkSfIntr
Definition: XrdLinkXeq.hh:169
XrdTlsSocket tlsIO
Definition: XrdLinkXeq.hh:188
void DoIt()
Definition: XrdLinkXeq.cc:292
int RecvAll(char *buff, int blen, int timeout=-1)
Definition: XrdLinkXeq.cc:509
XrdProtocol * Protocol
Definition: XrdLinkXeq.hh:183
bool Register(const char *hName)
Definition: XrdLinkXeq.cc:573
static XrdSysMutex statsMutex
Definition: XrdLinkXeq.hh:179
void setProtName(const char *name)
Definition: XrdLinkXeq.cc:944
static int LinkStalls
Definition: XrdLinkXeq.hh:168
static long long LinkBytesOut
Definition: XrdLinkXeq.hh:162
void syncStats(int *ctime=0)
Definition: XrdLinkXeq.cc:1090
bool setTLS(bool enable, XrdTlsContext *ctx=0)
Definition: XrdLinkXeq.cc:958
static int LinkTimeOuts
Definition: XrdLinkXeq.hh:167
void SetDialect(const char *dP)
Definition: XrdNetAddr.hh:205
void SetTLS(bool val)
Definition: XrdNetAddr.cc:590
void Zorch()
Definition: XrdPollInfo.hh:49
XrdPoll * Poller
Definition: XrdPollInfo.hh:43
virtual int Enable(XrdPollInfo &pInfo)=0
static char * Poll2Text(short events)
Definition: XrdPoll.cc:272
static void Detach(XrdPollInfo &pInfo)
Definition: XrdPoll.cc:177
virtual void Recycle(XrdLink *lp=0, int consec=0, const char *reason=0)=0
virtual int Stats(char *buff, int blen, int do_sync=0)=0
virtual int Process(XrdLink *lp)=0
void Terminate(XrdLink *lP=0)
Definition: XrdSendQ.cc:396
int Send(const char *buff, int blen)
Definition: XrdSendQ.cc:230
unsigned int Backlog()
Definition: XrdSendQ.hh:46
int Emsg(const char *esfx, int ecode, const char *text1, const char *text2=0)
Definition: XrdSysError.cc:95
void Lock(XrdSysMutex *Mutex)
int fd
Socket file descriptor.
Definition: XrdTcpMonPin.hh:61
long long bytesOut
Bytes written to the socket.
Definition: XrdTcpMonPin.hh:64
int consec
Seconds connected.
Definition: XrdTcpMonPin.hh:62
virtual void Monitor(XrdNetAddrInfo &netInfo, LinkInfo &lnkInfo, int liLen)=0
long long bytesIn
Bytes read from the socket.
Definition: XrdTcpMonPin.hh:63
const char * tident
Pointer to the client's trace identifier.
Definition: XrdTcpMonPin.hh:60
@ TLS_HS_BLOCK
Always block during handshake.
Definition: XrdTlsSocket.hh:53
XrdTls::RC Accept(std::string *eMsg=0)
void Shutdown(SDType=sdImmed)
@ TLS_RBL_WBL
blocking read blocking write
Definition: XrdTlsSocket.hh:48
XrdTls::RC Write(const char *buffer, size_t size, int &bytesOut)
const char * Version()
XrdTls::RC Read(char *buffer, size_t size, int &bytesRead)
Read from the TLS connection. If necessary, a handshake will be done.
const char * Init(XrdTlsContext &ctx, int sfd, RW_Mode rwm, HS_Mode hsm, bool isClient, bool serial=true, const char *tid="")
void SetTraceID(const char *tid)
int Pending(bool any=true)
XrdTls::RC Peek(char *buffer, size_t size, int &bytesPeek)
XrdTlsPeerCerts * getCerts(bool ver=true)
static std::string RC2Text(XrdTls::RC rc, bool dbg=false)
Definition: XrdTls.cc:127
@ TLS_AOK
All went well, will always be zero.
Definition: XrdTls.hh:40
XrdTlsContext * tlsCtx
Definition: XrdGlobals.cc:52
XrdTcpMonPin * TcpMonPin
Definition: XrdLinkXeq.cc:80
const int maxIOV
Definition: XrdLinkXeq.cc:82
XrdSysError Log
Definition: XrdConfig.cc:112
XrdScheduler Sched
Definition: XrdLinkCtl.cc:54
int devNull
Definition: XrdGlobals.cc:55
int getIovMax()
int fdnum
File descriptor for data.
Definition: XrdOucSFVec.hh:47
int sendsz
Length of data at offset.
Definition: XrdOucSFVec.hh:46