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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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
*
* 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, bool disable_shared, size_t H5_ATTR_UNUSED p_size, 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, bool 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_STATIC(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: Pointer to new message in native struct
* Failure: NULL
*-------------------------------------------------------------------------
*/
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 p_size, const uint8_t *p)
{
H5O_mdci_t *mesg = NULL; /* New cache image message */
const uint8_t *p_end = p + p_size - 1; /* End of the p buffer */
void *ret_value = NULL;
FUNC_ENTER_PACKAGE
assert(f);
assert(p);
/* Version of message */
if (H5_IS_BUFFER_OVERFLOW(p, 1, p_end))
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding");
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");
if (H5_IS_BUFFER_OVERFLOW(p, H5F_sizeof_addr(f), p_end))
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding");
H5F_addr_decode(f, &p, &(mesg->addr));
if (H5_IS_BUFFER_OVERFLOW(p, H5F_sizeof_size(f), p_end))
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding");
H5F_DECODE_LENGTH(f, p, mesg->size);
/* Set return value */
ret_value = (void *)mesg;
done:
if (!ret_value && mesg)
H5FL_FREE(H5O_mdci_t, mesg);
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
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__mdci_encode(H5F_t *f, bool H5_ATTR_UNUSED disable_shared, size_t H5_ATTR_UNUSED p_size, uint8_t *p,
const void *_mesg)
{
const H5O_mdci_t *mesg = (const H5O_mdci_t *)_mesg;
FUNC_ENTER_PACKAGE_NOERR
/* Sanity check */
assert(f);
assert(p);
assert(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
*
*-------------------------------------------------------------------------
*/
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 */
assert(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
*
*-------------------------------------------------------------------------
*/
static size_t
H5O__mdci_size(const H5F_t *f, bool 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
*
*-------------------------------------------------------------------------
*/
static herr_t
H5O__mdci_free(void *mesg)
{
FUNC_ENTER_PACKAGE_NOERR
assert(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
*
*-------------------------------------------------------------------------
*/
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 */
assert(f);
assert(mesg);
/* Free file space for cache image */
if (H5_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");
assert(H5_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
*
*-------------------------------------------------------------------------
*/
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 */
assert(f);
assert(mdci);
assert(stream);
assert(indent >= 0);
assert(fwidth >= 0);
fprintf(stream, "%*s%-*s %" PRIuHADDR "\n", indent, "", fwidth,
"Metadata Cache Image Block address:", mdci->addr);
fprintf(stream, "%*s%-*s %" PRIuHSIZE "\n", indent, "", fwidth,
"Metadata Cache Image Block size in bytes:", mdci->size);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5O__mdci_debug() */
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