summaryrefslogtreecommitdiffstats
path: root/src/H5Ocache_image.c
blob: bd273ec6d72b759417466bc02842f0097ffa9ee5 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:     H5Ocache_image.c
 *              June 21, 2015
 *              John Mainzer
 *
 * Purpose:     A message indicating that a metadata cache image block
 *		of the indicated length exists at the specified offset
 *		in the HDF5 file.
 *
 * 		The mdci_msg only appears in the superblock extension.
 *
 *-------------------------------------------------------------------------
 */

#include "H5Omodule.h" /* This source code file is part of the H5O module */
#define H5F_FRIEND     /*suppress error about including H5Fpkg   */

#include "H5private.h"   /* Generic Functions                     */
#include "H5Eprivate.h"  /* Error handling                        */
#include "H5Fpkg.h"      /* Files                                 */
#include "H5FLprivate.h" /* Free Lists                            */
#include "H5Opkg.h"      /* Object headers                        */
#include "H5MFprivate.h" /* File space management                 */

/* Callbacks for message class */
static void *H5O__mdci_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags, unsigned *ioflags, size_t p_size,
                              const uint8_t *p);
static herr_t H5O__mdci_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
static void  *H5O__mdci_copy(const void *_mesg, void *_dest);
static size_t H5O__mdci_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
static herr_t H5O__mdci_free(void *mesg);
static herr_t H5O__mdci_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
static herr_t H5O__mdci_debug(H5F_t *f, const void *_mesg, FILE *stream, int indent, int fwidth);

/* This message derives from H5O message class */
const H5O_msg_class_t H5O_MSG_MDCI[1] = {{
    H5O_MDCI_MSG_ID,    /* message id number              */
    "mdci",             /* message name for debugging     */
    sizeof(H5O_mdci_t), /* native message size            */
    0,                  /* messages are shareable?         */
    H5O__mdci_decode,   /* decode message                 */
    H5O__mdci_encode,   /* encode message                 */
    H5O__mdci_copy,     /* copy method                    */
    H5O__mdci_size,     /* size of mdc image message      */
    NULL,               /* reset method                   */
    H5O__mdci_free,     /* free method                    */
    H5O__mdci_delete,   /* file delete method             */
    NULL,               /* link method                    */
    NULL,               /* set share method               */
    NULL,               /* can share method               */
    NULL,               /* pre copy native value to file  */
    NULL,               /* copy native value to file      */
    NULL,               /* post copy native value to file */
    NULL,               /* get creation index             */
    NULL,               /* set creation index             */
    H5O__mdci_debug     /* debugging                      */
}};

/* Only one version of the metadata cache image message at present */
#define H5O_MDCI_VERSION_0 0

/* Declare the free list for H5O_mdci_t's */
H5FL_DEFINE(H5O_mdci_t);

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_decode
 *
 * Purpose:     Decode a metadata cache image  message and return a
 * 		pointer to a newly allocated H5O_mdci_t struct.
 *
 * Return:      Success:        Ptr to new message in native struct.
 *              Failure:        NULL
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O__mdci_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
                 unsigned H5_ATTR_UNUSED *ioflags, size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
{
    H5O_mdci_t *mesg;             /* Native message        */
    void       *ret_value = NULL; /* Return value          */

    FUNC_ENTER_PACKAGE

    /* Sanity check */
    HDassert(f);
    HDassert(p);

    /* Version of message */
    if (*p++ != H5O_MDCI_VERSION_0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for message")

    /* Allocate space for message */
    if (NULL == (mesg = (H5O_mdci_t *)H5FL_MALLOC(H5O_mdci_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL,
                    "memory allocation failed for metadata cache image message")

    /* Decode */
    H5F_addr_decode(f, &p, &(mesg->addr));
    H5F_DECODE_LENGTH(f, p, mesg->size);

    /* Set return value */
    ret_value = (void *)mesg;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__mdci_decode() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_encode
 *
 * Purpose:     Encode metadata cache image message
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O__mdci_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, const void *_mesg)
{
    const H5O_mdci_t *mesg = (const H5O_mdci_t *)_mesg;

    FUNC_ENTER_PACKAGE_NOERR

    /* Sanity check */
    HDassert(f);
    HDassert(p);
    HDassert(mesg);

    /* encode */
    *p++ = H5O_MDCI_VERSION_0;
    H5F_addr_encode(f, &p, mesg->addr);
    H5F_ENCODE_LENGTH(f, p, mesg->size);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__mdci_encode() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_copy
 *
 * Purpose:     Copies a message from _MESG to _DEST, allocating _DEST if
 *              necessary.
 *
 * Return:      Success:        Ptr to _DEST
 *              Failure:        NULL
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static void *
H5O__mdci_copy(const void *_mesg, void *_dest)
{
    const H5O_mdci_t *mesg      = (const H5O_mdci_t *)_mesg;
    H5O_mdci_t       *dest      = (H5O_mdci_t *)_dest;
    void             *ret_value = NULL; /* Return value */

    FUNC_ENTER_PACKAGE

    /* check args */
    HDassert(mesg);
    if (!dest && NULL == (dest = H5FL_MALLOC(H5O_mdci_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* copy */
    *dest = *mesg;

    /* Set return value */
    ret_value = dest;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O_mdci__copy() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_size
 *
 * Purpose:     Returns the size of the raw message in bytes not counting
 *              the message type or size fields, but only the data fields.
 *              This function doesn't take into account alignment.
 *
 * Return:      Success:        Message data size in bytes without alignment.
 *
 *              Failure:        zero
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static size_t
H5O__mdci_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void H5_ATTR_UNUSED *_mesg)
{
    size_t ret_value = 0; /* Return value */

    FUNC_ENTER_PACKAGE_NOERR

    /* Set return value */
    ret_value = (size_t)(1 +                  /* Version number           */
                         H5F_SIZEOF_ADDR(f) + /* addr of metadata cache   */
                                              /* image block              */
                         H5F_SIZEOF_SIZE(f)); /* length of metadata cache */
                                              /* image block              */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__mdci_size() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_free
 *
 * Purpose:     Free the message
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O__mdci_free(void *mesg)
{
    FUNC_ENTER_PACKAGE_NOERR

    HDassert(mesg);

    mesg = H5FL_FREE(H5O_mdci_t, mesg);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__mdci_free() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_delete
 *
 * Purpose:     Free file space referenced by message
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Quincey Koziol
 *              Wednesday, March 19, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O__mdci_delete(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
{
    H5O_mdci_t *mesg = (H5O_mdci_t *)_mesg;
    haddr_t     final_eoa;           /* For sanity check */
    herr_t      ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* check args */
    HDassert(f);
    HDassert(mesg);

    /* Free file space for cache image */
    if (H5F_addr_defined(mesg->addr)) {
        /* The space for the cache image block was allocated directly
         * from the VFD layer at the end of file.  As this was the
         * last file space allocation before shutdown, the cache image
         * should still be the last item in the file.
         */
        if (f->shared->closing) {
            /* Get the eoa, and verify that it has the expected value */
            if (HADDR_UNDEF == (final_eoa = H5FD_get_eoa(f->shared->lf, H5FD_MEM_DEFAULT)))
                HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "unable to get file size")

            HDassert(H5F_addr_eq(final_eoa, mesg->addr + mesg->size));

            if (H5FD_free(f->shared->lf, H5FD_MEM_SUPER, f, mesg->addr, mesg->size) < 0)
                HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "can't free MDC image")
        }
        else if (H5MF_xfree(f, H5FD_MEM_SUPER, mesg->addr, mesg->size) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free file space for cache image block")
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__mdci_delete() */

/*-------------------------------------------------------------------------
 * Function:    H5O__mdci_debug
 *
 * Purpose:     Prints debugging info.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  John Mainzer
 *              6/22/15
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5O__mdci_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream, int indent, int fwidth)
{
    const H5O_mdci_t *mdci = (const H5O_mdci_t *)_mesg;

    FUNC_ENTER_PACKAGE_NOERR

    /* check args */
    HDassert(f);
    HDassert(mdci);
    HDassert(stream);
    HDassert(indent >= 0);
    HDassert(fwidth >= 0);

    HDfprintf(stream, "%*s%-*s %" PRIuHADDR "\n", indent, "", fwidth,
              "Metadata Cache Image Block address:", mdci->addr);

    HDfprintf(stream, "%*s%-*s %" PRIuHSIZE "\n", indent, "", fwidth,
              "Metadata Cache Image Block size in bytes:", mdci->size);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__mdci_debug() */