XRootD
XrdTlsFlush Namespace Reference

Functions

void * Flusher (void *parg)
 
bool Setup_Flusher (XrdTlsContextImpl *pImpl, int flushT)
 

Function Documentation

◆ Flusher()

void* XrdTlsFlush::Flusher ( void *  parg)

Definition at line 181 of file XrdTlsContext.cc.

182 {
183  EPNAME("Flusher");
184  time_t tStart, tWaited;
185  int flushT, waitT, hits, miss, sesn, tmos;
186  long tNow;
187 
188 // Get the implementation details
189 //
190  XrdTlsContextImpl *ctxImpl = static_cast<XrdTlsContextImpl*>(parg);
191 
192 // Get the interval as it may change as we are running
193 //
194  ctxImpl->crlMutex.ReadLock();
195  waitT = flushT = ctxImpl->flushT;
196  ctxImpl->crlMutex.UnLock();
197 
198 // Indicate we have started in the trace record
199 //
200  DBG_CTX("Cache flusher started; interval="<<flushT<<" seconds.");
201 
202 // Do this forever
203 //
204 do{tStart = time(0);
205  ctxImpl->flsCVar->Wait(waitT);
206  tWaited= time(0) - tStart;
207 
208 // Check if this context is still alive. Generally, it never gets deleted.
209 //
210  ctxImpl->crlMutex.ReadLock();
211  if (!ctxImpl->owner) break;
212 
213 // If the interval changed, see if we should wait a bit longer
214 //
215  if (flushT != ctxImpl->flushT && tWaited < ctxImpl->flushT-1)
216  {waitT = ctxImpl->flushT - tWaited;
217  ctxImpl->crlMutex.UnLock();
218  continue;
219  }
220 
221 // Get the new values and drop the lock
222 //
223  waitT = flushT = ctxImpl->flushT;
224  ctxImpl->crlMutex.UnLock();
225 
226 // Get some relevant statistics
227 //
228  sesn = SSL_CTX_sess_number(ctxImpl->ctx);
229  hits = SSL_CTX_sess_hits(ctxImpl->ctx);
230  miss = SSL_CTX_sess_misses(ctxImpl->ctx);
231  tmos = SSL_CTX_sess_timeouts(ctxImpl->ctx);
232 
233 // Flush the cache
234 //
235  tNow = time(0);
236  SSL_CTX_flush_sessions(ctxImpl->ctx, tNow);
237 
238 // Print some stuff should debugging be on
239 //
240  if (TRACING(XrdTls::dbgCTX))
241  {char mBuff[512];
242  snprintf(mBuff, sizeof(mBuff), "sess=%d hits=%d miss=%d timeouts=%d",
243  sesn, hits, miss, tmos);
244  DBG_CTX("Cache flushed; " <<mBuff);
245  }
246  } while(true);
247 
248 // If we are here the context that started us has gone away and we are done
249 //
250  bool keepctx = ctxImpl->crlRunning;
251  ctxImpl->flsRunning = false;
252  ctxImpl->crlMutex.UnLock();
253  if (!keepctx) delete ctxImpl;
254  return (void *)0;
255 }
#define EPNAME(x)
Definition: XrdBwmTrace.hh:56
#define DBG_CTX(y)
Definition: XrdTlsTrace.hh:39
#define TRACING(x)
Definition: XrdTrace.hh:70
static const int dbgCTX
Turn debugging in for context operations.
Definition: XrdTls.hh:100
XrdTlsContext * owner
XrdSysCondVar * flsCVar
XrdSysRWLock crlMutex

References XrdTlsContextImpl::crlMutex, XrdTlsContextImpl::crlRunning, XrdTlsContextImpl::ctx, DBG_CTX, XrdTls::dbgCTX, EPNAME, XrdTlsContextImpl::flsCVar, XrdTlsContextImpl::flsRunning, XrdTlsContextImpl::flushT, XrdTlsContextImpl::owner, XrdSysRWLock::ReadLock(), TRACING, XrdSysRWLock::UnLock(), and XrdSysCondVar::Wait().

Referenced by Setup_Flusher().

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◆ Setup_Flusher()

bool XrdTlsFlush::Setup_Flusher ( XrdTlsContextImpl pImpl,
int  flushT 
)

Definition at line 261 of file XrdTlsContext.cc.

262 {
263  pthread_t tid;
264  int rc;
265 
266 // Set the new flush interval
267 //
268  pImpl->crlMutex.WriteLock();
269  pImpl->flushT = flushT;
270  pImpl->crlMutex.UnLock();
271 
272 // If the flush thread is already running, then wake it up to get the new value
273 //
274  if (pImpl->flsRunning)
275  {pImpl->flsCVar->Signal();
276  return true;
277  }
278 
279 // Start the flusher thread
280 //
281  pImpl->flsCVar = new XrdSysCondVar();
282  if ((rc = XrdSysThread::Run(&tid, XrdTlsFlush::Flusher, (void *)pImpl,
283  0, "Cache Flusher")))
284  {char eBuff[512];
285  snprintf(eBuff, sizeof(eBuff),
286  "Unable to start cache flusher thread; rc=%d", rc);
287  XrdTls::Emsg("SessCache:", eBuff, false);
288  return false;
289  }
290 
291 // Finish up
292 //
293  pImpl->flsRunning = true;
294  SSL_CTX_set_session_cache_mode(pImpl->ctx, SSL_SESS_CACHE_NO_AUTO_CLEAR);
295  return true;
296 }
static int Run(pthread_t *, void *(*proc)(void *), void *arg, int opts=0, const char *desc=0)
static void Emsg(const char *tid, const char *msg=0, bool flush=true)
Definition: XrdTls.cc:104
void * Flusher(void *parg)

References XrdTlsContextImpl::crlMutex, XrdTlsContextImpl::ctx, XrdTls::Emsg(), XrdTlsContextImpl::flsCVar, XrdTlsContextImpl::flsRunning, Flusher(), XrdTlsContextImpl::flushT, XrdSysThread::Run(), XrdSysCondVar::Signal(), XrdSysRWLock::UnLock(), and XrdSysRWLock::WriteLock().

Referenced by XrdTlsContext::SessionCache().

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