summaryrefslogtreecommitdiffstats
path: root/src/H5FDfamily.c
blob: cc97a0f758c373948b205424305f53f96307cedc (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:	Robb Matzke <matzke@llnl.gov>
 *		Monday, November 10, 1997
 *
 * Purpose:	Implements a family of files that acts as a single hdf5
 *		file.  The purpose is to be able to split a huge file on a
 *		64-bit platform, transfer all the <2GB members to a 32-bit
 *		platform, and then access the entire huge file on the 32-bit
 *		platform.
 *
 *		All family members are logically the same size although their
 *		physical sizes may vary.  The logical member size is
 *		determined by looking at the physical size of the first member
 *		when the file is opened.  When creating a file family, the
 *		first member is created with a predefined physical size
 *		(actually, this happens when the file family is flushed, and
 *		can be quite time consuming on file systems that don't
 *		implement holes, like nfs).
 *
 */

#include "H5FDdrvr_module.h" /* This source code file is part of the H5FD driver module */


#include "H5private.h"		/* Generic Functions			*/
#include "H5CXprivate.h"        /* API Contexts                         */
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Fprivate.h"		/* File access				*/
#include "H5FDprivate.h"	/* File drivers				*/
#include "H5FDfamily.h"         /* Family file driver 			*/
#include "H5Iprivate.h"		/* IDs			  		*/
#include "H5MMprivate.h"	/* Memory management			*/
#include "H5Pprivate.h"		/* Property lists			*/

/* The size of the member name buffers */
#define H5FD_FAM_MEMB_NAME_BUF_SIZE 4096

/* The driver identification number, initialized at runtime */
static hid_t H5FD_FAMILY_g = 0;

/* The description of a file belonging to this driver. */
typedef struct H5FD_family_t {
    H5FD_t	pub;		/*public stuff, must be first		*/
    hid_t	memb_fapl_id;	/*file access property list for members	*/
    hsize_t	memb_size;	/*actual size of each member file	*/
    hsize_t	pmem_size;	/*member size passed in from property	*/
    unsigned	nmembs;		/*number of family members		*/
    unsigned	amembs;		/*number of member slots allocated	*/
    H5FD_t	**memb;		/*dynamic array of member pointers	*/
    haddr_t	eoa;		/*end of allocated addresses		*/
    char	*name;		/*name generator printf format		*/
    unsigned	flags;		/*flags for opening additional members	*/

    /* Information from properties set by 'h5repart' tool */
    hsize_t	mem_newsize;	/*new member size passed in as private
                                 * property. It's used only by h5repart */
    hbool_t     repart_members; /* Whether to mark the superblock dirty
                                 * when it is loaded, so that the family
                                 * member sizes can be re-encoded       */
} H5FD_family_t;

/* Driver-specific file access properties */
typedef struct H5FD_family_fapl_t {
    hsize_t	memb_size;	/*size of each member			*/
    hid_t	memb_fapl_id;	/*file access property list of each memb*/
} H5FD_family_fapl_t;

/* Callback prototypes */
static herr_t H5FD_family_term(void);
static void *H5FD_family_fapl_get(H5FD_t *_file);
static void *H5FD_family_fapl_copy(const void *_old_fa);
static herr_t H5FD_family_fapl_free(void *_fa);
static hsize_t H5FD_family_sb_size(H5FD_t *_file);
static herr_t H5FD_family_sb_encode(H5FD_t *_file, char *name/*out*/,
		     unsigned char *buf/*out*/);
static herr_t H5FD_family_sb_decode(H5FD_t *_file, const char *name,
                    const unsigned char *buf);
static H5FD_t *H5FD_family_open(const char *name, unsigned flags,
				hid_t fapl_id, haddr_t maxaddr);
static herr_t H5FD_family_close(H5FD_t *_file);
static int H5FD_family_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
static herr_t H5FD_family_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_family_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
static herr_t H5FD_family_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa);
static haddr_t H5FD_family_get_eof(const H5FD_t *_file, H5FD_mem_t type);
static herr_t  H5FD_family_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
static herr_t H5FD_family_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
			       size_t size, void *_buf/*out*/);
static herr_t H5FD_family_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
				size_t size, const void *_buf);
static herr_t H5FD_family_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
static herr_t H5FD_family_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
static herr_t H5FD_family_lock(H5FD_t *_file, hbool_t rw);
static herr_t H5FD_family_unlock(H5FD_t *_file);

/* The class struct */
static const H5FD_class_t H5FD_family_g = {
    "family",					/*name			*/
    HADDR_MAX,					/*maxaddr		*/
    H5F_CLOSE_WEAK,				/*fc_degree		*/
    H5FD_family_term,                           /*terminate             */
    H5FD_family_sb_size,			/*sb_size		*/
    H5FD_family_sb_encode,			/*sb_encode		*/
    H5FD_family_sb_decode,			/*sb_decode		*/
    sizeof(H5FD_family_fapl_t),			/*fapl_size		*/
    H5FD_family_fapl_get,			/*fapl_get		*/
    H5FD_family_fapl_copy,			/*fapl_copy		*/
    H5FD_family_fapl_free,			/*fapl_free		*/
    0,						/*dxpl_size		*/
    NULL,					/*dxpl_copy		*/
    NULL,					/*dxpl_free		*/
    H5FD_family_open,				/*open			*/
    H5FD_family_close,				/*close			*/
    H5FD_family_cmp,				/*cmp			*/
    H5FD_family_query,		                /*query			*/
    NULL,					/*get_type_map		*/
    NULL,					/*alloc			*/
    NULL,					/*free			*/
    H5FD_family_get_eoa,			/*get_eoa		*/
    H5FD_family_set_eoa,			/*set_eoa		*/
    H5FD_family_get_eof,			/*get_eof		*/
    H5FD_family_get_handle,                     /*get_handle            */
    H5FD_family_read,				/*read			*/
    H5FD_family_write,				/*write			*/
    H5FD_family_flush,				/*flush			*/
    H5FD_family_truncate,			/*truncate		*/
    H5FD_family_lock,                           /*lock                  */
    H5FD_family_unlock,                         /*unlock                */
    NULL,                                       /*dedup                 */
    H5FD_FLMAP_DICHOTOMY                        /*fl_map                */
};


/*--------------------------------------------------------------------------
NAME
   H5FD__init_package -- Initialize interface-specific information
USAGE
    herr_t H5FD__init_package()
RETURNS
    Non-negative on success/Negative on failure
DESCRIPTION
    Initializes any interface-specific data or routines.  (Just calls
    H5FD_family_init currently).

--------------------------------------------------------------------------*/
static herr_t
H5FD__init_package(void)
{
    herr_t ret_value = SUCCEED;

    FUNC_ENTER_STATIC

    if(H5FD_family_init() < 0)
        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "unable to initialize family VFD")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5FD__init_package() */


/*-------------------------------------------------------------------------
 * Function:    H5FD_family_init
 *
 * Purpose:     Initialize this driver by registering the driver with the
 *              library.
 *
 * Return:      Success:    The driver ID for the family driver
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:  Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5FD_family_init(void)
{
    hid_t ret_value = H5I_INVALID_HID;   /* Return value */

    FUNC_ENTER_NOAPI(H5I_INVALID_HID)

    if(H5I_VFL != H5I_get_type(H5FD_FAMILY_g))
        H5FD_FAMILY_g = H5FD_register(&H5FD_family_g, sizeof(H5FD_class_t), FALSE);

    /* Set return value */
    ret_value = H5FD_FAMILY_g;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5FD_family_init() */


/*---------------------------------------------------------------------------
 * Function:	H5FD_family_term
 *
 * Purpose:	Shut down the VFD
 *
 * Returns:     Non-negative on success or negative on failure
 *
 * Programmer:  Quincey Koziol
 *              Friday, Jan 30, 2004
 *
 *---------------------------------------------------------------------------
 */
static herr_t
H5FD_family_term(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Reset VFL ID */
    H5FD_FAMILY_g=0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_family_term() */


/*-------------------------------------------------------------------------
 * Function:	H5Pset_fapl_family
 *
 * Purpose:	Sets the file access property list FAPL_ID to use the family
 *		driver. The MEMB_SIZE is the size in bytes of each file
 *		member (used only when creating a new file) and the
 *		MEMB_FAPL_ID is a file access property list to be used for
 *		each family member.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *		Raymond Lu
 * 		Tuesday, Oct 23, 2001
 *		Changed the file access list to the new generic property
 *		list.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pset_fapl_family(hid_t fapl_id, hsize_t msize, hid_t memb_fapl_id)
{
    herr_t ret_value;
    H5FD_family_fapl_t	fa={0, -1};
    H5P_genplist_t *plist;      /* Property list pointer */

    FUNC_ENTER_API(FAIL)
    H5TRACE3("e", "ihi", fapl_id, msize, memb_fapl_id);

    /* Check arguments */
    if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
    if(H5P_DEFAULT == memb_fapl_id)
        memb_fapl_id = H5P_FILE_ACCESS_DEFAULT;
    else
        if(TRUE != H5P_isa_class(memb_fapl_id, H5P_FILE_ACCESS))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")

    /* Initialize driver specific information. */
    fa.memb_size = msize;
    fa.memb_fapl_id = memb_fapl_id;

    if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
    ret_value = H5P_set_driver(plist, H5FD_FAMILY, &fa);

done:
    FUNC_LEAVE_API(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5Pget_fapl_family
 *
 * Purpose:	Returns information about the family file access property
 *		list though the function arguments.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *		Raymond Lu
 * 		Tuesday, Oct 23, 2001
 *		Changed the file access list to the new generic property
 *		list.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pget_fapl_family(hid_t fapl_id, hsize_t *msize/*out*/, hid_t *memb_fapl_id/*out*/)
{
    H5P_genplist_t *plist;      /* Property list pointer */
    const H5FD_family_fapl_t	*fa;
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE3("e", "ixx", fapl_id, msize, memb_fapl_id);

    if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")
    if(H5FD_FAMILY != H5P_peek_driver(plist))
        HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver")
    if(NULL == (fa = (const H5FD_family_fapl_t *)H5P_peek_driver_info(plist)))
        HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info")
    if(msize)
        *msize = fa->memb_size;
    if(memb_fapl_id) {
        if(NULL == (plist = (H5P_genplist_t *)H5I_object(fa->memb_fapl_id)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")
        *memb_fapl_id = H5P_copy_plist(plist, TRUE);
    } /* end if */

done:
    FUNC_LEAVE_API(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_fapl_get
 *
 * Purpose:	Gets a file access property list which could be used to
 *		create an identical file.
 *
 * Return:	Success:	Ptr to new file access property list.
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Friday, August 13, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5FD_family_fapl_get(H5FD_t *_file)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    H5FD_family_fapl_t	*fa = NULL;
    H5P_genplist_t *plist;      /* Property list pointer */
    void *ret_value = NULL;     /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    if(NULL == (fa = (H5FD_family_fapl_t *)H5MM_calloc(sizeof(H5FD_family_fapl_t))))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    fa->memb_size = file->memb_size;
    if(NULL == (plist = (H5P_genplist_t *)H5I_object(file->memb_fapl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
    fa->memb_fapl_id = H5P_copy_plist(plist, FALSE);

    /* Set return value */
    ret_value=fa;

done:
    if(ret_value==NULL) {
        if(fa!=NULL)
            H5MM_xfree(fa);
    } /* end if */
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_fapl_copy
 *
 * Purpose:	Copies the family-specific file access properties.
 *
 * Return:	Success:	Ptr to a new property list
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void *
H5FD_family_fapl_copy(const void *_old_fa)
{
    const H5FD_family_fapl_t *old_fa = (const H5FD_family_fapl_t*)_old_fa;
    H5FD_family_fapl_t *new_fa = NULL;
    H5P_genplist_t *plist;      /* Property list pointer */
    void *ret_value = NULL;     /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    if(NULL == (new_fa = (H5FD_family_fapl_t *)H5MM_malloc(sizeof(H5FD_family_fapl_t))))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Copy the fields of the structure */
    H5MM_memcpy(new_fa, old_fa, sizeof(H5FD_family_fapl_t));

    /* Deep copy the property list objects in the structure */
    if(old_fa->memb_fapl_id==H5P_FILE_ACCESS_DEFAULT) {
        if(H5I_inc_ref(new_fa->memb_fapl_id, FALSE)<0)
            HGOTO_ERROR(H5E_VFL, H5E_CANTINC, NULL, "unable to increment ref count on VFL driver")
    } /* end if */
    else {
        if(NULL == (plist = (H5P_genplist_t *)H5I_object(old_fa->memb_fapl_id)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
        new_fa->memb_fapl_id = H5P_copy_plist(plist, FALSE);
    } /* end else */

    /* Set return value */
    ret_value=new_fa;

done:
    if(ret_value==NULL) {
        if(new_fa!=NULL)
            H5MM_xfree(new_fa);
    } /* end if */
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_fapl_free
 *
 * Purpose:	Frees the family-specific file access properties.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_fapl_free(void *_fa)
{
    H5FD_family_fapl_t	*fa = (H5FD_family_fapl_t*)_fa;
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    if(H5I_dec_ref(fa->memb_fapl_id) < 0)
        HGOTO_ERROR(H5E_VFL, H5E_CANTDEC, FAIL, "can't close driver ID")
    H5MM_xfree(fa);

done:
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_sb_size
 *
 * Purpose:	Returns the size of the private information to be stored in
 *		the superblock.
 *
 * Return:	Success:	The super block driver data size.
 *
 *		Failure:	never fails
 *
 * Programmer:	Raymond Lu
 *              Tuesday, May 10, 2005
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static hsize_t
H5FD_family_sb_size(H5FD_t H5_ATTR_UNUSED *_file)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* 8 bytes field for the size of member file size field should be
     * enough for now. */
    FUNC_LEAVE_NOAPI(8)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_sb_encode
 *
 * Purpose:	Encode driver information for the superblock. The NAME
 *		argument is a nine-byte buffer which will be initialized with
 *		an eight-character name/version number and null termination.
 *
 *		The encoding is the member file size and name template.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Raymond Lu
 *              Tuesday, May 10, 2005
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_sb_encode(H5FD_t *_file, char *name/*out*/, unsigned char *buf/*out*/)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Name and version number */
    HDstrncpy(name, "NCSAfami", (size_t)9);
    name[8] = '\0';

    /* Store member file size.  Use the member file size from the property here.
     * This is to guarantee backward compatibility.  If a file is created with
     * v1.6 library and the driver info isn't saved in the superblock.  We open
     * it with v1.8, the FILE->MEMB_SIZE will be the actual size of the first
     * member file (see H5FD_family_open).  So it isn't safe to use FILE->MEMB_SIZE.
     * If the file is created with v1.8, the correctness of FILE->PMEM_SIZE is
     * checked in H5FD_family_sb_decode. SLU - 2009/3/21
     */
    UINT64ENCODE(buf, (uint64_t)file->pmem_size);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_family_sb_encode() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_sb_decode
 *
 * Purpose:	This function has 2 separate purpose.  One is to decodes the
 *              superblock information for this driver. The NAME argument is
 *              the eight-character (plus null termination) name stored in i
 *              the file.  The FILE argument is updated according to the
 *              information in the superblock.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Raymond Lu
 *              Tuesday, May 10, 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_sb_decode(H5FD_t *_file, const char H5_ATTR_UNUSED *name, const unsigned char *buf)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    uint64_t            msize;
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Read member file size. Skip name template for now although it's saved. */
    UINT64DECODE(buf, msize);

    /* For h5repart only. Private property of new member size is used to signal
     * h5repart is being used to change member file size.  h5repart will open
     * files for read and write.  When the files are closed, metadata will be
     * flushed to the files and updated to this new size */
    if(file->mem_newsize)
        file->memb_size = file->pmem_size = file->mem_newsize;
    else {
        /* Default - use the saved member size */
        if(file->pmem_size == H5F_FAMILY_DEFAULT)
           file->pmem_size = msize;

        /* Check if member size from file access property is correct */
        if(msize != file->pmem_size)
            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "Family member size should be %lu.  But the size from file access property is %lu", (unsigned long)msize, (unsigned long)file->pmem_size)

        /* Update member file size to the size saved in the superblock.
         * That's the size intended to be. */
        file->memb_size = msize;
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_sb_decode() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_open
 *
 * Purpose:	Creates and/or opens a family of files as an HDF5 file.
 *
 * Return:	Success:	A pointer to a new file dat structure. The
 *				public fields will be initialized by the
 *				caller, which is always H5FD_open().
 *
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
/* Disable warning for "format not a string literal" here -QAK */
/*
 *      This pragma only needs to surround the snprintf() calls with
 *      memb_name & temp in the code below, but early (4.4.7, at least) gcc only
 *      allows diagnostic pragmas to be toggled outside of functions.
 */
H5_GCC_DIAG_OFF(format-nonliteral)
static H5FD_t *
H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
		 haddr_t maxaddr)
{
    H5FD_family_t	*file = NULL;
    char		*memb_name = NULL, *temp = NULL;
    hsize_t		eof = HADDR_UNDEF;
    unsigned		t_flags = flags & ~H5F_ACC_CREAT;
    H5FD_t     		*ret_value = NULL;

    FUNC_ENTER_NOAPI_NOINIT

    /* Check arguments */
    if(!name || !*name)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name")
    if(0 == maxaddr || HADDR_UNDEF == maxaddr)
        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr")

    /* Initialize file from file access properties */
    if(NULL == (file = (H5FD_family_t *)H5MM_calloc(sizeof(H5FD_family_t))))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate file struct")
    if(H5P_FILE_ACCESS_DEFAULT == fapl_id) {
        file->memb_fapl_id = H5P_FILE_ACCESS_DEFAULT;
        if(H5I_inc_ref(file->memb_fapl_id, FALSE) < 0)
            HGOTO_ERROR(H5E_VFL, H5E_CANTINC, NULL, "unable to increment ref count on VFL driver")
        file->memb_size = 1024 * 1024 * 1024; /*1GB. Actual member size to be updated later */
        file->pmem_size = 1024 * 1024 * 1024; /*1GB. Member size passed in through property */
        file->mem_newsize = 0;            /*New member size used by h5repart only       */
    } /* end if */
    else {
        H5P_genplist_t      *plist;      /* Property list pointer */
        const H5FD_family_fapl_t *fa;

        if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
        if(NULL == (fa = (const H5FD_family_fapl_t *)H5P_peek_driver_info(plist)))
            HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, NULL, "bad VFL driver info")

        /* Check for new family file size. It's used by h5repart only. */
        if(H5P_exist_plist(plist, H5F_ACS_FAMILY_NEWSIZE_NAME) > 0) {
            /* Get the new family file size */
            if(H5P_get(plist, H5F_ACS_FAMILY_NEWSIZE_NAME, &file->mem_newsize) < 0)
                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get new family member size")

            /* Set flag for later */
            file->repart_members = TRUE;
        } /* end if */

        if(fa->memb_fapl_id == H5P_FILE_ACCESS_DEFAULT) {
            if(H5I_inc_ref(fa->memb_fapl_id, FALSE) < 0)
                HGOTO_ERROR(H5E_VFL, H5E_CANTINC, NULL, "unable to increment ref count on VFL driver")
            file->memb_fapl_id = fa->memb_fapl_id;
        } /* end if */
        else {
            if(NULL == (plist = (H5P_genplist_t *)H5I_object(fa->memb_fapl_id)))
                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
            file->memb_fapl_id = H5P_copy_plist(plist, FALSE);
        } /* end else */
        file->memb_size = fa->memb_size; /* Actual member size to be updated later */
        file->pmem_size = fa->memb_size; /* Member size passed in through property */
    } /* end else */
    file->name = H5MM_strdup(name);
    file->flags = flags;

    /* Allocate space for the string buffers */
    if(NULL == (memb_name = (char *)H5MM_malloc(H5FD_FAM_MEMB_NAME_BUF_SIZE)))
        HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, NULL, "unable to allocate member name")
    if(NULL == (temp = (char *)H5MM_malloc(H5FD_FAM_MEMB_NAME_BUF_SIZE)))
        HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, NULL, "unable to allocate temporary member name")

    /* Check that names are unique */
    HDsnprintf(memb_name, H5FD_FAM_MEMB_NAME_BUF_SIZE, name, 0);
    HDsnprintf(temp, H5FD_FAM_MEMB_NAME_BUF_SIZE, name, 1);
    if(!HDstrcmp(memb_name, temp))
        HGOTO_ERROR(H5E_FILE, H5E_FILEEXISTS, NULL, "file names not unique")

    /* Open all the family members */
    while(1) {
        HDsnprintf(memb_name, H5FD_FAM_MEMB_NAME_BUF_SIZE, name, file->nmembs);

        /* Enlarge member array */
        if(file->nmembs >= file->amembs) {
            unsigned n = MAX(64, 2 * file->amembs);
            H5FD_t **x;

            HDassert(n > 0);
            if(NULL == (x = (H5FD_t **)H5MM_realloc(file->memb, n * sizeof(H5FD_t *))))
                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to reallocate members")
            file->amembs = n;
            file->memb = x;
        } /* end if */

        /*
         * Attempt to open file. If the first file cannot be opened then fail;
         * otherwise an open failure means that we've reached the last member.
         * Allow H5F_ACC_CREAT only on the first family member.
         */
        H5E_BEGIN_TRY {
            file->memb[file->nmembs] = H5FDopen(memb_name,
                (0==file->nmembs ? flags : t_flags), file->memb_fapl_id, HADDR_UNDEF);
        } H5E_END_TRY;
        if (!file->memb[file->nmembs]) {
            if (0 == file->nmembs)
                HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open member file")
            H5E_clear_stack(NULL);
            break;
        }
        file->nmembs++;
    }

    /* If the file is reopened and there's only one member file existing, this file may be
     * smaller than the size specified through H5Pset_fapl_family().  Update the actual
     * member size.
     */
    if ((eof=H5FDget_eof(file->memb[0], H5FD_MEM_DEFAULT))) file->memb_size = eof;

    ret_value=(H5FD_t *)file;

done:
    /* Release resources */
    if(memb_name)
        H5MM_xfree(memb_name);
    if(temp)
        H5MM_xfree(temp);

    /* Cleanup and fail */
    if(ret_value == NULL && file != NULL) {
        unsigned nerrors = 0;   /* Number of errors closing member files */
        unsigned u;             /* Local index variable */

        /* Close as many members as possible. Use private function here to avoid clearing
         * the error stack. We need the error message to indicate wrong member file size. */
        for(u = 0; u < file->nmembs; u++)
            if(file->memb[u])
                if(H5FD_close(file->memb[u]) < 0)
                    nerrors++;
        if(nerrors)
            HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, NULL, "unable to close member files")

        if(file->memb)
            H5MM_xfree(file->memb);
        if(H5I_dec_ref(file->memb_fapl_id) < 0)
            HDONE_ERROR(H5E_VFL, H5E_CANTDEC, NULL, "can't close driver ID")
        if(file->name)
            H5MM_xfree(file->name);
        H5MM_xfree(file);
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_open() */
H5_GCC_DIAG_ON(format-nonliteral)


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_close
 *
 * Purpose:	Closes a family of files.
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative with as many members closed as
 *				possible. The only subsequent operation
 *				permitted on the file is a close operation.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_close(H5FD_t *_file)
{
    H5FD_family_t *file = (H5FD_family_t*)_file;
    unsigned	nerrors = 0;    /* Number of errors while closing member files */
    unsigned	u;              /* Local index variable */
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Close as many members as possible. Use private function here to avoid clearing
     * the error stack. We need the error message to indicate wrong member file size. */
    for(u = 0; u < file->nmembs; u++) {
        if(file->memb[u]) {
            if(H5FD_close(file->memb[u]) < 0)
                nerrors++;
            else
                file->memb[u] = NULL;
        } /* end if */
    } /* end for */
    if(nerrors)
        /* Push error, but keep going*/
        HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "unable to close member files")

    /* Clean up other stuff */
    if(H5I_dec_ref(file->memb_fapl_id) < 0)
        /* Push error, but keep going*/
        HDONE_ERROR(H5E_VFL, H5E_CANTDEC, FAIL, "can't close driver ID")
    H5MM_xfree(file->memb);
    H5MM_xfree(file->name);
    H5MM_xfree(file);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_close() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_cmp
 *
 * Purpose:	Compares two file families to see if they are the same. It
 *		does this by comparing the first member of the two families.
 *
 * Return:	Success:	like strcmp()
 *
 *		Failure:	never fails (arguments were checked by the
 *				caller).
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static int
H5FD_family_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
{
    const H5FD_family_t	*f1 = (const H5FD_family_t*)_f1;
    const H5FD_family_t	*f2 = (const H5FD_family_t*)_f2;
    int ret_value = 0;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    HDassert(f1->nmembs >= 1 && f1->memb[0]);
    HDassert(f2->nmembs >= 1 && f2->memb[0]);

    ret_value = H5FDcmp(f1->memb[0], f2->memb[0]);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_cmp() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_query
 *
 * Purpose:	Set the flags that this VFL driver is capable of supporting.
 *              (listed in H5FDpublic.h)
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 * Programmer:	Quincey Koziol
 *              Friday, August 25, 2000
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_query(const H5FD_t * _file, unsigned long *flags /* out */)
{
    const H5FD_family_t	*file = (const H5FD_family_t*)_file;    /* Family VFD info */

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Set the VFL feature flags that this driver supports */
    if(flags) {
        *flags = 0;
        *flags |= H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
        *flags |= H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes. */
        *flags |= H5FD_FEAT_DATA_SIEVE;       /* OK to perform data sieving for faster raw data reads & writes */
        *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */

        /* Check for flags that are set by h5repart */
        if(file && file->repart_members)
            *flags |= H5FD_FEAT_DIRTY_DRVRINFO_LOAD; /* Mark the superblock dirty when it is loaded (so the family member sizes are rewritten) */
    } /* end if */

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_family_query() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_get_eoa
 *
 * Purpose:	Returns the end-of-address marker for the file. The EOA
 *		marker is the first address past the last byte allocated in
 *		the format address space.
 *
 * Return:	Success:	The end-of-address-marker
 *
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *              Raymond Lu
 *              21 Dec. 2006
 *              Added the parameter TYPE.  It's only used for MULTI driver.
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_family_get_eoa(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type)
{
    const H5FD_family_t	*file = (const H5FD_family_t*)_file;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    FUNC_LEAVE_NOAPI(file->eoa)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_set_eoa
 *
 * Purpose:	Set the end-of-address marker for the file.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *              Raymond Lu
 *              21 Dec. 2006
 *              Added the parameter TYPE.  It's only used for MULTI driver.
 *
 *-------------------------------------------------------------------------
 */
/* Disable warning for "format not a string literal" here -QAK */
/*
 *      This pragma only needs to surround the snprintf() call with
 *      memb_name in the code below, but early (4.4.7, at least) gcc only
 *      allows diagnostic pragmas to be toggled outside of functions.
 */
H5_GCC_DIAG_OFF(format-nonliteral)
static herr_t
H5FD_family_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t abs_eoa)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    haddr_t		addr = abs_eoa;
    char		*memb_name = NULL;
    unsigned		u;                      /* Local index variable */
    herr_t              ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Allocate space for the member name buffer */
    if(NULL == (memb_name = (char *)H5MM_malloc(H5FD_FAM_MEMB_NAME_BUF_SIZE)))
        HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, FAIL, "unable to allocate member name")

    for(u = 0; addr || u < file->nmembs; u++) {

        /* Enlarge member array */
        if(u >= file->amembs) {
            unsigned n = MAX(64, 2 * file->amembs);
            H5FD_t **x = (H5FD_t **)H5MM_realloc(file->memb, n * sizeof(H5FD_t *));

            if(!x)
                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate memory block")
            file->amembs = n;
            file->memb = x;
            file->nmembs = u;
        } /* end if */

        /* Create another file if necessary */
        if(u >= file->nmembs || !file->memb[u]) {
            file->nmembs = MAX(file->nmembs, u+1);
            HDsnprintf(memb_name, H5FD_FAM_MEMB_NAME_BUF_SIZE, file->name, u);
            H5E_BEGIN_TRY {
                H5_CHECK_OVERFLOW(file->memb_size, hsize_t, haddr_t);
                file->memb[u] = H5FDopen(memb_name, file->flags | H5F_ACC_CREAT,
                             file->memb_fapl_id, (haddr_t)file->memb_size);
            } H5E_END_TRY;
            if(NULL == file->memb[u])
                HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to open member file")
        } /* end if */

        /* Set the EOA marker for the member */
        /* (Note compensating for base address addition in internal routine) */
        H5_CHECK_OVERFLOW(file->memb_size, hsize_t, haddr_t);
        if(addr > (haddr_t)file->memb_size) {
            if(H5FD_set_eoa(file->memb[u], type, ((haddr_t)file->memb_size - file->pub.base_addr)) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to set file eoa")
            addr -= file->memb_size;
        } /* end if */
        else {
            if(H5FD_set_eoa(file->memb[u], type, (addr - file->pub.base_addr)) < 0)
                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to set file eoa")
            addr = 0;
        } /* end else */
    } /* end for */

    file->eoa = abs_eoa;

done:
    /* Release resources */
    if(memb_name)
        H5MM_xfree(memb_name);

    FUNC_LEAVE_NOAPI(ret_value)
}
H5_GCC_DIAG_ON(format-nonliteral)


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_get_eof
 *
 * Purpose:	Returns the end-of-file marker, which is the greater of
 *		either the total family size or the current EOA marker.
 *
 * Return:	Success:	End of file address, the first address past
 *				the end of the family of files or the current
 *				EOA, whichever is larger.
 *
 *		Failure:      	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_family_get_eof(const H5FD_t *_file, H5FD_mem_t type)
{
    const H5FD_family_t	*file = (const H5FD_family_t*)_file;
    haddr_t		eof=0;
    int			i;      /* Local index variable */
    haddr_t ret_value = HADDR_UNDEF;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /*
     * Find the last member that has a non-zero EOF and break out of the loop
     * with `i' equal to that member. If all members have zero EOF then exit
     * loop with i==0.
     */
    HDassert(file->nmembs > 0);
    for(i = (int)file->nmembs - 1; i >= 0; --i) {
        if((eof = H5FD_get_eof(file->memb[i], type)) != 0)
            break;
        if(0 == i)
            break;
    } /* end for */

    /* Adjust for base address for file */
    eof += file->pub.base_addr;

    /*
     * The file size is the number of members before the i'th member plus the
     * size of the i'th member.
     */
    eof += ((unsigned)i)*file->memb_size;

    /* Set return value */
    ret_value = eof;

    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:       H5FD_family_get_handle
 *
 * Purpose:        Returns the file handle of FAMILY file driver.
 *
 * Returns:        Non-negative if succeed or negative if fails.
 *
 * Programmer:     Raymond Lu
 *                 Sept. 16, 2002
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle)
{
    H5FD_family_t       *file = (H5FD_family_t *)_file;
    H5P_genplist_t      *plist;
    hsize_t             offset;
    int                 memb;
    herr_t              ret_value = FAIL;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Get the plist structure and family offset */
    if(NULL == (plist = H5P_object_verify(fapl, H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
    if(H5P_get(plist, H5F_ACS_FAMILY_OFFSET_NAME, &offset) < 0)
        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get offset for family driver")

    if(offset > (file->memb_size * file->nmembs))
        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "offset is bigger than file size")
    memb = (int)(offset/file->memb_size);

    ret_value = H5FD_get_vfd_handle(file->memb[memb], fapl, file_handle);

done:
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_read
 *
 * Purpose:	Reads SIZE bytes of data from FILE beginning at address ADDR
 *		into buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero. Result is stored in caller-supplied
 *				buffer BUF.
 *
 *		Failure:	-1, contents of buffer BUF are undefined.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
		 void *_buf/*out*/)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    unsigned char	*buf = (unsigned char*)_buf;
    haddr_t		sub;
    size_t		req;
    hsize_t             tempreq;
    unsigned		u;              /* Local index variable */
    H5P_genplist_t      *plist;      /* Property list pointer */
    herr_t              ret_value=SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /*
     * Get the member data transfer property list. If the transfer property
     * list does not belong to this driver then assume defaults
     */
    if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")

    /* Read from each member */
    while(size > 0) {
        H5_CHECKED_ASSIGN(u, unsigned, addr / file->memb_size, hsize_t);

        sub = addr % file->memb_size;

	/* This check is for mainly for IA32 architecture whose size_t's size
	 * is 4 bytes, to prevent overflow when user application is trying to
	 * write files bigger than 4GB. */
        tempreq = file->memb_size-sub;
  	if(tempreq > SIZET_MAX)
	    tempreq = SIZET_MAX;
        req = MIN(size, (size_t)tempreq);

        HDassert(u<file->nmembs);

        if (H5FDread(file->memb[u], type, dxpl_id, sub, req, buf)<0)
            HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "member file read failed")

        addr += req;
        buf += req;
        size -= req;
    }

done:
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_write
 *
 * Purpose:	Writes SIZE bytes of data to FILE beginning at address ADDR
 *		from buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
		  const void *_buf)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    const unsigned char	*buf = (const unsigned char*)_buf;
    haddr_t		sub;
    size_t		req;
    hsize_t             tempreq;
    unsigned		u;      /* Local index variable */
    H5P_genplist_t *plist;      /* Property list pointer */
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /*
     * Get the member data transfer property list. If the transfer property
     * list does not belong to this driver then assume defaults.
     */
    if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")

    /* Write to each member */
    while (size>0) {
        H5_CHECKED_ASSIGN(u, unsigned, addr / file->memb_size, hsize_t);

        sub = addr % file->memb_size;

        /* This check is for mainly for IA32 architecture whose size_t's size
         * is 4 bytes, to prevent overflow when user application is trying to
         * write files bigger than 4GB. */
        tempreq = file->memb_size-sub;
	if(tempreq > SIZET_MAX)
	    tempreq = SIZET_MAX;
        req = MIN(size, (size_t)tempreq);

        HDassert(u<file->nmembs);

        if (H5FDwrite(file->memb[u], type, dxpl_id, sub, req, buf)<0)
            HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "member file write failed")

        addr += req;
        buf += req;
        size -= req;
    }

done:
    FUNC_LEAVE_NOAPI(ret_value)
}


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_flush
 *
 * Purpose:	Flushes all family members.
 *
 * Return:	Success:	0
 *		Failure:	-1, as many files flushed as possible.
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_flush(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    unsigned		u, nerrors = 0;
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    for(u = 0; u < file->nmembs; u++)
        if(file->memb[u] && H5FD_flush(file->memb[u], closing) < 0)
            nerrors++;

    if(nerrors)
        HGOTO_ERROR(H5E_IO, H5E_BADVALUE, FAIL, "unable to flush member files")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_flush() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_family_truncate
 *
 * Purpose:	Truncates all family members.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1, as many files truncated as possible.
 *
 * Programmer:	Quincey Koziol
 *              Saturday, February 23, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
{
    H5FD_family_t	*file = (H5FD_family_t*)_file;
    unsigned		u, nerrors = 0;
    herr_t      	ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    for(u = 0; u < file->nmembs; u++)
        if(file->memb[u] && H5FD_truncate(file->memb[u], closing) < 0)
            nerrors++;

    if(nerrors)
        HGOTO_ERROR(H5E_IO, H5E_BADVALUE, FAIL, "unable to flush member files")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_truncate() */


/*-------------------------------------------------------------------------
 * Function:    H5FD_family_lock
 *
 * Purpose:     To place an advisory lock on a file.
 *              The lock type to apply depends on the parameter "rw":
 *                      TRUE--opens for write: an exclusive lock
 *                      FALSE--opens for read: a shared lock
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:  Vailin Choi; May 2013
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_lock(H5FD_t *_file, hbool_t rw)
{
    H5FD_family_t *file = (H5FD_family_t *)_file;   /* VFD file struct */
    unsigned u;                         /* Local index variable */
    herr_t ret_value = SUCCEED;	        /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Place the lock on all the member files */
    for(u = 0; u < file->nmembs; u++)
        if(file->memb[u])
            if(H5FD_lock(file->memb[u], rw) < 0)
                break;

    /* If one of the locks failed, try to unlock the locked member files
     * in an attempt to return to a fully unlocked state.
     */
    if(u < file->nmembs) {
        unsigned v;                         /* Local index variable */

        for(v = 0; v < u; v++) {
            if(H5FD_unlock(file->memb[v]) < 0)
                /* Push error, but keep going */
                HDONE_ERROR(H5E_IO, H5E_CANTUNLOCK, FAIL, "unable to unlock member files")
        } /* end for */
        HGOTO_ERROR(H5E_IO, H5E_CANTLOCK, FAIL, "unable to lock member files")
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_lock() */


/*-------------------------------------------------------------------------
 * Function:    H5FD_family_unlock
 *
 * Purpose:     To remove the existing lock on the file
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:  Vailin Choi; May 2013
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_family_unlock(H5FD_t *_file)
{
    H5FD_family_t *file = (H5FD_family_t *)_file;   	/* VFD file struct */
    unsigned	u;                                      /* Local index variable */
    herr_t ret_value = SUCCEED;                         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Remove the lock on the member files */
    for(u = 0; u < file->nmembs; u++)
        if(file->memb[u])
            if(H5FD_unlock(file->memb[u]) < 0)
                HGOTO_ERROR(H5E_IO, H5E_CANTUNLOCK, FAIL, "unable to unlock member files")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_family_unlock() */