summaryrefslogtreecommitdiffstats
path: root/src/H5B2hdr.c
blob: 702854bd3f2dad77b33818ac3e4003c1bdf87239 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5B2int.c
 *			Feb 27 2006
 *			Quincey Koziol <koziol@ncsa.uiuc.edu>
 *
 * Purpose:		Internal routines for managing v2 B-trees.
 *
 *-------------------------------------------------------------------------
 */

/****************/
/* Module Setup */
/****************/

#define H5B2_PACKAGE		/*suppress error about including H5B2pkg  */

/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5B2pkg.h"		/* v2 B-trees				*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5MFprivate.h"	/* File memory management		*/
#include "H5VMprivate.h"		/* Vectors and arrays 			*/

/****************/
/* Local Macros */
/****************/

/* Number of records that fit into leaf node */
#define H5B2_NUM_LEAF_REC(n, r) \
    (((n) - H5B2_LEAF_PREFIX_SIZE) / (r))

/* Uncomment this macro to enable extra sanity checking */
/* #define H5B2_DEBUG */

/******************/
/* Local Typedefs */
/******************/


/********************/
/* Package Typedefs */
/********************/


/********************/
/* Local Prototypes */
/********************/


/*********************/
/* Package Variables */
/*********************/


/*****************************/
/* Library Private Variables */
/*****************************/


/*******************/
/* Local Variables */
/*******************/

/* Declare a free list to manage the H5B2_hdr_t struct */
H5FL_DEFINE_STATIC(H5B2_hdr_t);

/* Declare a free list to manage B-tree node pages to/from disk */
H5FL_BLK_DEFINE_STATIC(node_page);

/* Declare a free list to manage the 'size_t' sequence information */
H5FL_SEQ_DEFINE_STATIC(size_t);

/* Declare a free list to manage the 'H5B2_node_info_t' sequence information */
H5FL_SEQ_DEFINE(H5B2_node_info_t);



/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_init
 *
 * Purpose:	Allocate & initialize B-tree header info
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_init(H5B2_hdr_t *hdr, const H5B2_create_t *cparam, void *ctx_udata,
    void *parent, unsigned depth)
{
    size_t sz_max_nrec;                 /* Temporary variable for range checking */
    unsigned u_max_nrec_size;           /* Temporary variable for range checking */
    unsigned u;                         /* Local index variable */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /*
     * Check arguments.
     */
    HDassert(hdr);
    HDassert(cparam);
    HDassert(cparam->cls);
    HDassert((cparam->cls->crt_context && cparam->cls->dst_context) ||
        (NULL == cparam->cls->crt_context && NULL == cparam->cls->dst_context));
    HDassert(cparam->node_size > 0);
    HDassert(cparam->rrec_size > 0);
    HDassert(cparam->merge_percent > 0 && cparam->merge_percent <= 100);
    HDassert(cparam->split_percent > 0 && cparam->split_percent <= 100);
    HDassert(cparam->merge_percent < (cparam->split_percent / 2));

    /* Initialize basic information */
    hdr->parent = parent;
    hdr->rc = 0;
    hdr->pending_delete = FALSE;

    /* Assign dynamic information */
    hdr->depth = (uint16_t)depth;

    /* Assign user's information */
    hdr->split_percent = cparam->split_percent;
    hdr->merge_percent = cparam->merge_percent;
    hdr->node_size = cparam->node_size;
    hdr->rrec_size = cparam->rrec_size;

    /* Assign common type information */
    hdr->cls = cparam->cls;

    /* Allocate "page" for node I/O */
    if(NULL == (hdr->page = H5FL_BLK_MALLOC(node_page, hdr->node_size)))
        HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed")
#ifdef H5_CLEAR_MEMORY
HDmemset(hdr->page, 0, hdr->node_size);
#endif /* H5_CLEAR_MEMORY */

    /* Allocate array of node info structs */
    if(NULL == (hdr->node_info = H5FL_SEQ_MALLOC(H5B2_node_info_t, (size_t)(hdr->depth + 1))))
        HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed")

    /* Initialize leaf node info */
    sz_max_nrec = H5B2_NUM_LEAF_REC(hdr->node_size, hdr->rrec_size);
    H5_ASSIGN_OVERFLOW(/* To: */ hdr->node_info[0].max_nrec, /* From: */ sz_max_nrec, /* From: */ size_t, /* To: */ unsigned)
    hdr->node_info[0].split_nrec = (hdr->node_info[0].max_nrec * hdr->split_percent) / 100;
    hdr->node_info[0].merge_nrec = (hdr->node_info[0].max_nrec * hdr->merge_percent) / 100;
    hdr->node_info[0].cum_max_nrec = hdr->node_info[0].max_nrec;
    hdr->node_info[0].cum_max_nrec_size = 0;
    if(NULL == (hdr->node_info[0].nat_rec_fac = H5FL_fac_init(hdr->cls->nrec_size * hdr->node_info[0].max_nrec)))
        HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create node native key block factory")
    hdr->node_info[0].node_ptr_fac = NULL;

    /* Allocate array of pointers to internal node native keys */
    /* (uses leaf # of records because its the largest) */
    if(NULL == (hdr->nat_off = H5FL_SEQ_MALLOC(size_t, (size_t)hdr->node_info[0].max_nrec)))
        HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed")

    /* Initialize offsets in native key block */
    /* (uses leaf # of records because its the largest) */
    for(u = 0; u < hdr->node_info[0].max_nrec; u++)
        hdr->nat_off[u] = hdr->cls->nrec_size * u;

    /* Compute size to store # of records in each node */
    /* (uses leaf # of records because its the largest) */
    u_max_nrec_size = H5VM_limit_enc_size((uint64_t)hdr->node_info[0].max_nrec);
    H5_ASSIGN_OVERFLOW(/* To: */ hdr->max_nrec_size, /* From: */ u_max_nrec_size, /* From: */ unsigned, /* To: */ uint8_t)
    HDassert(hdr->max_nrec_size <= H5B2_SIZEOF_RECORDS_PER_NODE);

    /* Initialize internal node info */
    if(depth > 0) {
        for(u = 1; u < (unsigned)(depth + 1); u++) {
            sz_max_nrec = H5B2_NUM_INT_REC(hdr, u);
            H5_ASSIGN_OVERFLOW(/* To: */ hdr->node_info[u].max_nrec, /* From: */ sz_max_nrec, /* From: */ size_t, /* To: */ unsigned)
            HDassert(hdr->node_info[u].max_nrec <= hdr->node_info[u - 1].max_nrec);

            hdr->node_info[u].split_nrec = (hdr->node_info[u].max_nrec * hdr->split_percent) / 100;
            hdr->node_info[u].merge_nrec = (hdr->node_info[u].max_nrec * hdr->merge_percent) / 100;

            hdr->node_info[u].cum_max_nrec = ((hdr->node_info[u].max_nrec + 1) *
                hdr->node_info[u - 1].cum_max_nrec) + hdr->node_info[u].max_nrec;
            u_max_nrec_size = H5VM_limit_enc_size((uint64_t)hdr->node_info[u].cum_max_nrec);
            H5_ASSIGN_OVERFLOW(/* To: */ hdr->node_info[u].cum_max_nrec_size, /* From: */ u_max_nrec_size, /* From: */ unsigned, /* To: */ uint8_t)

            if(NULL == (hdr->node_info[u].nat_rec_fac = H5FL_fac_init(hdr->cls->nrec_size * hdr->node_info[u].max_nrec)))
                HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create node native key block factory")
            if(NULL == (hdr->node_info[u].node_ptr_fac = H5FL_fac_init(sizeof(H5B2_node_ptr_t) * (hdr->node_info[u].max_nrec + 1))))
                HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create internal 'branch' node node pointer block factory")
        } /* end for */
    } /* end if */

    /* Determine if we are doing SWMR writes.  Only enable for data chunks for
     * now. */
    hdr->swmr_write = (H5F_INTENT(hdr->f) & H5F_ACC_SWMR_WRITE) > 0
            && (hdr->cls->id == H5B2_CDSET_ID
            || hdr->cls->id == H5B2_CDSET_FILT_ID);

    /* Clear the shadowed list pointers */
    hdr->shadowed_leaf = NULL;
    hdr->shadowed_internal = NULL;

    /* Create the callback context, if the callback exists */
    if(hdr->cls->crt_context) {
        if(NULL == (hdr->cb_ctx = (*hdr->cls->crt_context)(ctx_udata)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTCREATE, FAIL, "unable to create v2 B-tree client callback context")
    } /* end if */

done:
    if(ret_value < 0)
        if(H5B2_hdr_free(hdr) < 0)
            HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to free shared v2 B-tree info")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_init() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_alloc
 *
 * Purpose:	Allocate B-tree header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Oct 27 2009
 *
 *-------------------------------------------------------------------------
 */
H5B2_hdr_t *
H5B2_hdr_alloc(H5F_t *f)
{
    H5B2_hdr_t *hdr = NULL;             /* v2 B-tree header */
    H5B2_hdr_t *ret_value;              /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /*
     * Check arguments.
     */
    HDassert(f);

    /* Allocate space for the shared information */
    if(NULL == (hdr = H5FL_CALLOC(H5B2_hdr_t)))
        HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "memory allocation failed for B-tree header")

    /* Assign non-zero information */
    hdr->f = f;
    hdr->sizeof_addr = H5F_SIZEOF_ADDR(f);
    hdr->sizeof_size = H5F_SIZEOF_SIZE(f);
    hdr->hdr_size = H5B2_HEADER_SIZE(hdr);
    hdr->root.addr = HADDR_UNDEF;

    /* Set return value */
    ret_value = hdr;

done:

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_alloc() */


/*-------------------------------------------------------------------------
 * Function:	H5HF_hdr_create
 *
 * Purpose:	Create new fractal heap header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Mar 21 2006
 *
 *-------------------------------------------------------------------------
 */
haddr_t
H5B2_hdr_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam,
    void *ctx_udata, void *parent)
{
    H5B2_hdr_t *hdr = NULL;     /* The new v2 B-tree header information */
    haddr_t ret_value;          /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /*
     * Check arguments.
     */
    HDassert(f);
    HDassert(cparam);

    /* Allocate v2 B-tree header */
    if(NULL == (hdr = H5B2_hdr_alloc(f)))
        HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, HADDR_UNDEF, "allocation failed for B-tree header")

    /* Initialize shared B-tree info */
    if(H5B2_hdr_init(hdr, cparam, ctx_udata, parent, (unsigned)0) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, HADDR_UNDEF, "can't create shared B-tree info")

    /* Allocate space for the header on disk */
    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->hdr_size)))
        HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, HADDR_UNDEF, "file allocation failed for B-tree header")

    /* Cache the new B-tree node */
    if(H5AC_insert_entry(f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, HADDR_UNDEF, "can't add B-tree header to cache")

    /* Set address of v2 B-tree header to return */
    ret_value = hdr->addr;

done:
    if(!H5F_addr_defined(ret_value) && hdr)
        if(H5B2_hdr_free(hdr) < 0)
            HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, HADDR_UNDEF, "unable to release v2 B-tree header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_create() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_incr
 *
 * Purpose:	Increment reference count on B-tree header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Oct 13 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_incr(H5B2_hdr_t *hdr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity checks */
    HDassert(hdr);

    /* Mark header as un-evictable when a B-tree node is depending on it */
    if(hdr->rc == 0)
        if(H5AC_pin_protected_entry(hdr) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_CANTPIN, FAIL, "unable to pin v2 B-tree header")

    /* Increment reference count on B-tree header */
    hdr->rc++;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_incr_hdr() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_decr
 *
 * Purpose:	Decrement reference count on B-tree header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Oct 13 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_decr(H5B2_hdr_t *hdr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->rc > 0);

    /* Decrement reference count on B-tree header */
    hdr->rc--;

    /* Mark header as evictable again when no nodes depend on it */
    if(hdr->rc == 0)
        if(H5AC_unpin_entry(hdr) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPIN, FAIL, "unable to unpin v2 B-tree header")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_decr() */


/*-------------------------------------------------------------------------
 * Function:    H5B2_hdr_fuse_incr
 *
 * Purpose:     Increment file reference count on shared v2 B-tree header
 *
 * Return:      SUCCEED (Can't fail)
 *
 * Programmer:  Quincey Koziol
 *              koziol@hdfgroup.org
 *              Oct 27 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_fuse_incr(H5B2_hdr_t *hdr)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Sanity check */
    HDassert(hdr);

    /* Increment file reference count on shared header */
    hdr->file_rc++;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5B2_hdr_fuse_incr() */


/*-------------------------------------------------------------------------
 * Function:    H5B2_hdr_fuse_decr
 *
 * Purpose:     Decrement file reference count on shared v2 B-tree header
 *
 * Return:      The file's reference count after the decrement. (Can't fail)
 *
 * Programmer:  Quincey Koziol
 *              koziol@hdfgroup.org
 *              Oct 27 2009
 *
 *-------------------------------------------------------------------------
 */
size_t
H5B2_hdr_fuse_decr(H5B2_hdr_t *hdr)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->file_rc);

    /* Decrement file reference count on shared header */
    hdr->file_rc--;

    FUNC_LEAVE_NOAPI(hdr->file_rc)
} /* end H5B2_hdr_fuse_decr() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_dirty
 *
 * Purpose:	Mark B-tree header as dirty
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Oct 13 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_dirty(H5B2_hdr_t *hdr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(hdr);

    /* Mark B-tree header as dirty in cache */
    if(H5AC_mark_entry_dirty(hdr) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTMARKDIRTY, FAIL, "unable to mark v2 B-tree header as dirty")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_dirty() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_free
 *
 * Purpose:	Free B-tree header info
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_free(H5B2_hdr_t *hdr)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(hdr);

    /* Destroy the callback context */
    if(hdr->cb_ctx) {
        if((*hdr->cls->dst_context)(hdr->cb_ctx) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy v2 B-tree client callback context")
        hdr->cb_ctx = NULL;
    } /* end if */

    /* Free the B-tree node buffer */
    if(hdr->page)
        hdr->page = H5FL_BLK_FREE(node_page, hdr->page);

    /* Free the array of offsets into the native key block */
    if(hdr->nat_off)
        hdr->nat_off = H5FL_SEQ_FREE(size_t, hdr->nat_off);

    /* Release the node info */
    if(hdr->node_info) {
        unsigned u;             /* Local index variable */

        /* Destroy free list factories */
        for(u = 0; u < (unsigned)(hdr->depth + 1); u++) {
            if(hdr->node_info[u].nat_rec_fac)
                if(H5FL_fac_term(hdr->node_info[u].nat_rec_fac) < 0)
                    HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy node's native record block factory")
            if(hdr->node_info[u].node_ptr_fac)
                if(H5FL_fac_term(hdr->node_info[u].node_ptr_fac) < 0)
                    HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy node's node pointer block factory")
        } /* end for */

        /* Free the array of node info structs */
        hdr->node_info = H5FL_SEQ_FREE(H5B2_node_info_t, hdr->node_info);
    } /* end if */

    /* Free B-tree header info */
    hdr = H5FL_FREE(H5B2_hdr_t, hdr);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_free() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_hdr_delete
 *
 * Purpose:	Delete a v2 B-tree, starting with the header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Oct 15 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id)
{
    unsigned cache_flags = H5AC__NO_FLAGS_SET;  /* Flags for unprotecting v2 B-tree header */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(FAIL)

    /* Sanity check */
    HDassert(hdr);

#ifndef NDEBUG
{
    unsigned hdr_status = 0;         /* v2 B-tree header's status in the metadata cache */

    /* Check the v2 B-tree header's status in the metadata cache */
    if(H5AC_get_entry_status(hdr->f, hdr->addr, &hdr_status) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "unable to check metadata cache status for v2 B-tree header")

    /* Sanity checks on v2 B-tree header */
    HDassert(hdr_status & H5AC_ES__IN_CACHE);
    HDassert(hdr_status & H5AC_ES__IS_PROTECTED);
} /* end block */
#endif /* NDEBUG */

    /* Delete all nodes in B-tree */
    if(H5F_addr_defined(hdr->root.addr))
        if(H5B2_delete_node(hdr, dxpl_id, hdr->depth, &hdr->root, hdr, hdr->remove_op, hdr->remove_op_data) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to delete B-tree nodes")

    /* Indicate that the heap header should be deleted & file space freed */
    cache_flags |= H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;

done:
    /* Unprotect the header with appropriate flags */
    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, cache_flags) < 0)
        HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree header")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_hdr_delete() */