-
Notifications
You must be signed in to change notification settings - Fork 149
/
XrdClFileStateHandler.hh
585 lines (525 loc) · 27.8 KB
/
XrdClFileStateHandler.hh
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
//------------------------------------------------------------------------------
// Copyright (c) 2011-2014 by European Organization for Nuclear Research (CERN)
// Author: Lukasz Janyst <ljanyst@cern.ch>
//------------------------------------------------------------------------------
// 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 General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with XRootD. If not, see <http://www.gnu.org/licenses/>.
//
// In applying this licence, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
//------------------------------------------------------------------------------
#ifndef __XRD_CL_FILE_STATE_HANDLER_HH__
#define __XRD_CL_FILE_STATE_HANDLER_HH__
#include "XrdCl/XrdClXRootDResponses.hh"
#include "XrdCl/XrdClPostMasterInterfaces.hh"
#include "XrdCl/XrdClFileSystem.hh"
#include "XrdCl/XrdClMessageUtils.hh"
#include "XrdSys/XrdSysPthread.hh"
#include "XrdCl/XrdClLocalFileHandler.hh"
#include <list>
#include <set>
#include <vector>
#include <sys/uio.h>
namespace XrdCl
{
class ResponseHandlerHolder;
class Message;
//----------------------------------------------------------------------------
//! Handle the stateful operations
//----------------------------------------------------------------------------
class FileStateHandler
{
public:
//------------------------------------------------------------------------
//! State of the file
//------------------------------------------------------------------------
enum FileStatus
{
Closed, //!< The file is closed
Opened, //!< Opening has succeeded
Error, //!< Opening has failed
Recovering, //!< Recovering from an error
OpenInProgress, //!< Opening is in progress
CloseInProgress //!< Closing operation is in progress
};
//------------------------------------------------------------------------
//! Constructor
//------------------------------------------------------------------------
FileStateHandler();
//------------------------------------------------------------------------
//! Constructor
//!
//! @param useVirtRedirector if true Metalink files will be treated
//! as a VirtualRedirectors
//------------------------------------------------------------------------
FileStateHandler( bool useVirtRedirector );
//------------------------------------------------------------------------
//! Destructor
//------------------------------------------------------------------------
~FileStateHandler();
//------------------------------------------------------------------------
//! Open the file pointed to by the given URL
//!
//! @param url url of the file to be opened
//! @param flags OpenFlags::Flags
//! @param mode Access::Mode for new files, 0 otherwise
//! @param handler handler to be notified about the status of the operation
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Open( const std::string &url,
uint16_t flags,
uint16_t mode,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Close the file object
//!
//! @param handler handler to be notified about the status of the operation
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Close( ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Obtain status information for this file - async
//!
//! @param force do not use the cached information, force re-stating
//! @param handler handler to be notified when the response arrives,
//! the response parameter will hold a StatInfo object
//! if the procedure is successful
//! @param timeout timeout value, if 0 the environment default will
//! be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Stat( bool force,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Read a data chunk at a given offset - sync
//!
//! @param offset offset from the beginning of the file
//! @param size number of bytes to be read
//! @param buffer a pointer to a buffer big enough to hold the data
//! or 0 if the buffer should be allocated by the system
//! @param handler handler to be notified when the response arrives,
//! the response parameter will hold a buffer object if
//! the procedure was successful, if a preallocated
//! buffer was specified then the buffer object will
//! "wrap" this buffer
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Read( uint64_t offset,
uint32_t size,
void *buffer,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Write a data chunk at a given offset - async
//!
//! @param offset offset from the beginning of the file
//! @param size number of bytes to be written
//! @param buffer a pointer to the buffer holding the data to be written
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Write( uint64_t offset,
uint32_t size,
const void *buffer,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Commit all pending disk writes - async
//!
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Sync( ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Truncate the file to a particular size - async
//!
//! @param size desired size of the file
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 the environment default will be
//! used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Truncate( uint64_t size,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Read scattered data chunks in one operation - async
//!
//! @param chunks list of the chunks to be read
//! @param buffer a pointer to a buffer big enough to hold the data
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 then the environment default
//! will be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus VectorRead( const ChunkList &chunks,
void *buffer,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Write scattered data chunks in one operation - async
//!
//! @param chunks list of the chunks to be read
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 then the environment default
//! will be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus VectorWrite( const ChunkList &chunks,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Write scattered buffers in one operation - async
//!
//! @param offset offset from the beginning of the file
//! @param iov list of the buffers to be written
//! @param iovcnt number of buffers
//! @param handler handler to be notified when the response arrives
//! @param timeout timeout value, if 0 then the environment default
//! will be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus WriteV( uint64_t offset,
const struct iovec *iov,
int iovcnt,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Performs a custom operation on an open file, server implementation
//! dependent - async
//!
//! @param arg query argument
//! @param handler handler to be notified when the response arrives,
//! the response parameter will hold a Buffer object
//! if the procedure is successful
//! @param timeout timeout value, if 0 the environment default will
//! be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Fcntl( const Buffer &arg,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Get access token to a file - async
//!
//! @param handler handler to be notified when the response arrives,
//! the response parameter will hold a Buffer object
//! if the procedure is successful
//! @param timeout timeout value, if 0 the environment default will
//! be used
//! @return status of the operation
//------------------------------------------------------------------------
XRootDStatus Visa( ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Set extended attributes - async
//!
//! @param attrs : list of extended attributes to set
//! @param handler : handler to be notified when the response arrives,
//! the response parameter will hold a std::vector of
//! XAttrStatus objects
//! @param timeout : timeout value, if 0 the environment default will
//! be used
//!
//! @return : status of the operation
//------------------------------------------------------------------------
XRootDStatus SetXAttr( const std::vector<xattr_t> &attrs,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Get extended attributes - async
//!
//! @param attrs : list of extended attributes to get
//! @param handler : handler to be notified when the response arrives,
//! the response parameter will hold a std::vector of
//! XAttr objects
//! @param timeout : timeout value, if 0 the environment default will
//! be used
//!
//! @return : status of the operation
//------------------------------------------------------------------------
XRootDStatus GetXAttr( const std::vector<std::string> &attrs,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Delete extended attributes - async
//!
//! @param attrs : list of extended attributes to set
//! @param handler : handler to be notified when the response arrives,
//! the response parameter will hold a std::vector of
//! XAttrStatus objects
//! @param timeout : timeout value, if 0 the environment default will
//! be used
//!
//! @return : status of the operation
//------------------------------------------------------------------------
XRootDStatus DelXAttr( const std::vector<std::string> &attrs,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! List extended attributes - async
//!
//! @param handler : handler to be notified when the response arrives,
//! the response parameter will hold a std::vector of
//! XAttr objects
//! @param timeout : timeout value, if 0 the environment default will
//! be used
//!
//! @return : status of the operation
//------------------------------------------------------------------------
XRootDStatus ListXAttr( ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Process the results of the opening operation
//------------------------------------------------------------------------
void OnOpen( const XRootDStatus *status,
const OpenInfo *openInfo,
const HostList *hostList );
//------------------------------------------------------------------------
//! Process the results of the closing operation
//------------------------------------------------------------------------
void OnClose( const XRootDStatus *status );
//------------------------------------------------------------------------
//! Handle an error while sending a stateful message
//------------------------------------------------------------------------
void OnStateError( XRootDStatus *status,
Message *message,
ResponseHandler *userHandler,
MessageSendParams &sendParams );
//------------------------------------------------------------------------
//! Handle stateful redirect
//------------------------------------------------------------------------
void OnStateRedirection( const std::string &redirectUrl,
Message *message,
ResponseHandler *userHandler,
MessageSendParams &sendParams );
//------------------------------------------------------------------------
//! Handle stateful response
//------------------------------------------------------------------------
void OnStateResponse( XRootDStatus *status,
Message *message,
AnyObject *response,
HostList *hostList );
//------------------------------------------------------------------------
//! Check if the file is open
//------------------------------------------------------------------------
bool IsOpen() const;
//------------------------------------------------------------------------
//! Set file property
//!
//! @see File::GetProperty for propert list
//------------------------------------------------------------------------
bool SetProperty( const std::string &name, const std::string &value );
//------------------------------------------------------------------------
//! Get file property
//!
//! @see File::SetProperty for property list
//------------------------------------------------------------------------
bool GetProperty( const std::string &name, std::string &value ) const;
//------------------------------------------------------------------------
//! Lock the internal lock
//------------------------------------------------------------------------
void Lock()
{
pMutex.Lock();
}
//------------------------------------------------------------------------
//! Unlock the internal lock
//------------------------------------------------------------------------
void UnLock()
{
pMutex.UnLock();
}
//------------------------------------------------------------------------
//! Tick
//------------------------------------------------------------------------
void Tick( time_t now );
//------------------------------------------------------------------------
//! Declare timeout on requests being recovered
//------------------------------------------------------------------------
void TimeOutRequests( time_t now );
//------------------------------------------------------------------------
//! Called in the child process after the fork
//------------------------------------------------------------------------
void AfterForkChild();
private:
//------------------------------------------------------------------------
// Helper for queuing messages
//------------------------------------------------------------------------
struct RequestData
{
RequestData(): request(0), handler(0) {}
RequestData( Message *r, ResponseHandler *h,
const MessageSendParams &p ):
request(r), handler(h), params(p) {}
Message *request;
ResponseHandler *handler;
MessageSendParams params;
};
typedef std::list<RequestData> RequestList;
//------------------------------------------------------------------------
//! Generic implementation of xattr operation
//!
//! @param subcode : xattr operation code
//! @param attrs : operation argument
//! @param handler : operation handler
//! @param timeout : operation timeout
//------------------------------------------------------------------------
template<typename T>
Status XAttrOperationImpl( kXR_char subcode,
kXR_char options,
const std::vector<T> &attrs,
ResponseHandler *handler,
uint16_t timeout = 0 );
//------------------------------------------------------------------------
//! Send a message to a host or put it in the recovery queue
//------------------------------------------------------------------------
Status SendOrQueue( const URL &url,
Message *msg,
ResponseHandler *handler,
MessageSendParams &sendParams );
//------------------------------------------------------------------------
//! Check if the stateful error is recoverable
//------------------------------------------------------------------------
bool IsRecoverable( const XRootDStatus &stataus ) const;
//------------------------------------------------------------------------
//! Recover a message
//!
//! @param rd request data associated with the message
//! @param callbackOnFailure should the current handler be called back
//! if the recovery procedure fails
//------------------------------------------------------------------------
Status RecoverMessage( RequestData rd, bool callbackOnFailure = true );
//------------------------------------------------------------------------
//! Run the recovery procedure if appropriate
//------------------------------------------------------------------------
Status RunRecovery();
//------------------------------------------------------------------------
// Send a close and ignore the response
//------------------------------------------------------------------------
Status SendClose( uint16_t timeout );
//------------------------------------------------------------------------
//! Check if the file is open for read only
//------------------------------------------------------------------------
bool IsReadOnly() const;
//------------------------------------------------------------------------
//! Re-open the current file at a given server
//------------------------------------------------------------------------
Status ReOpenFileAtServer( const URL &url, uint16_t timeout );
//------------------------------------------------------------------------
//! Fail a message
//------------------------------------------------------------------------
void FailMessage( RequestData rd, XRootDStatus status );
//------------------------------------------------------------------------
//! Fail queued messages
//------------------------------------------------------------------------
void FailQueuedMessages( XRootDStatus status );
//------------------------------------------------------------------------
//! Re-send queued messages
//------------------------------------------------------------------------
void ReSendQueuedMessages();
//------------------------------------------------------------------------
//! Re-write file handle
//------------------------------------------------------------------------
void ReWriteFileHandle( Message *msg );
//------------------------------------------------------------------------
//! Reset monitoring vars
//------------------------------------------------------------------------
void ResetMonitoringVars()
{
pOpenTime.tv_sec = 0; pOpenTime.tv_usec = 0;
pRBytes = 0;
pVRBytes = 0;
pWBytes = 0;
pVSegs = 0;
pRCount = 0;
pVRCount = 0;
pWCount = 0;
pCloseReason = Status();
}
//------------------------------------------------------------------------
//! Dispatch monitoring information on close
//------------------------------------------------------------------------
void MonitorClose( const XRootDStatus *status );
//------------------------------------------------------------------------
//! Issues request:
//! - if the request is for a Metalink a redirect is generated
//! - if the request is for a local file, it will be passed to
//! LocalFileHandler
//! - otherwise vanilla XRootD request will be sent
//------------------------------------------------------------------------
XRootDStatus IssueRequest( const URL &url,
Message *msg,
ResponseHandler *handler,
MessageSendParams &sendParams );
mutable XrdSysMutex pMutex;
FileStatus pFileState;
XRootDStatus pStatus;
StatInfo *pStatInfo;
URL *pFileUrl;
URL *pDataServer;
URL *pLoadBalancer;
URL *pStateRedirect;
uint8_t *pFileHandle;
uint16_t pOpenMode;
uint16_t pOpenFlags;
RequestList pToBeRecovered;
std::set<Message*> pInTheFly;
uint64_t pSessionId;
bool pDoRecoverRead;
bool pDoRecoverWrite;
bool pFollowRedirects;
bool pUseVirtRedirector;
//------------------------------------------------------------------------
// Monitoring variables
//------------------------------------------------------------------------
timeval pOpenTime;
uint64_t pRBytes;
uint64_t pVRBytes;
uint64_t pWBytes;
uint64_t pVWBytes;
uint64_t pVSegs;
uint64_t pRCount;
uint64_t pVRCount;
uint64_t pWCount;
uint64_t pVWCount;
XRootDStatus pCloseReason;
//------------------------------------------------------------------------
// Holds the OpenHanlder used to issue reopen
// (there is only only OpenHandler reopening a file at a time)
//------------------------------------------------------------------------
ResponseHandlerHolder *pReOpenHandler;
//------------------------------------------------------------------------
// Responsible for file:// operations on the local filesystem
//------------------------------------------------------------------------
LocalFileHandler *pLFileHandler;
};
}
#endif // __XRD_CL_FILE_STATE_HANDLER_HH__