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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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: H5Fio.c
* Jan 10 2008
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: File I/O routines.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5F_block_read
*
* Purpose: Reads some data from a file/server/etc into a buffer.
* The data is contiguous. The address is relative to the base
* address for the file.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_block_read(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
hid_t dxpl_id, void *buf/*out*/)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
HDassert(f);
HDassert(f->shared);
HDassert(buf);
HDassert(H5F_addr_defined(addr));
/* Check for attempting I/O on 'temporary' file address */
if(H5F_addr_le(f->shared->tmp_addr, (addr + size)))
HGOTO_ERROR(H5E_IO, H5E_BADRANGE, FAIL, "attempting I/O in temporary file space")
/* Pass through metadata accumulator layer */
if(H5F_accum_read(f, dxpl_id, type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "read through metadata accumulator failed")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_block_read() */
/*-------------------------------------------------------------------------
* Function: H5F_block_write
*
* Purpose: Writes some data from memory to a file/server/etc. The
* data is contiguous. The address is relative to the base
* address.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 10 1997
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_block_write(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
hid_t dxpl_id, const void *buf)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
#ifdef QAK
HDfprintf(stderr, "%s: write to addr = %a, size = %Zu\n", FUNC, addr, size);
#endif /* QAK */
HDassert(f);
HDassert(f->shared);
HDassert(f->intent & H5F_ACC_RDWR);
HDassert(buf);
HDassert(H5F_addr_defined(addr));
/* Check for attempting I/O on 'temporary' file address */
if(H5F_addr_le(f->shared->tmp_addr, (addr + size)))
HGOTO_ERROR(H5E_IO, H5E_BADRANGE, FAIL, "attempting I/O in temporary file space")
/* Pass through metadata accumulator layer */
if(H5F_accum_write(f, dxpl_id, type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "write through metadata accumulator failed")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_block_write() */
/*-------------------------------------------------------------------------
* Function: H5F_flush_tagged_metadata
*
* Purpose: Flushes metadata with specified tag in the metadata cache
* to disk.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Mike McGreevy
* September 9, 2010
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_flush_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI(FAIL)
/* Use tag to search for and flush associated metadata */
if(H5AC_flush_tagged_metadata(f, tag, dxpl_id)<0)
HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
/* Flush out the metadata accumulator */
if(H5F_accum_flush(f, dxpl_id) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush metadata accumulator")
/* Flush file buffers to disk. */
if(H5FD_flush(f->shared->lf, dxpl_id, FALSE) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "low level flush failed")
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5F_flush_tagged_metadata */
/*-------------------------------------------------------------------------
* Function: H5F_evict_tagged_metadata
*
* Purpose: Evicts metadata from the cache with specified tag.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Mike McGreevy
* September 9, 2010
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_evict_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI(FAIL)
/* Unpin the superblock, as this will be marked for eviction and it can't
be pinned. */
if(H5AC_unpin_entry(f->shared->sblock) < 0)
HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "unable to unpin superblock")
f->shared->sblock = NULL;
/* Evict the object's metadata */
if(H5AC_evict_tagged_metadata(f, tag, dxpl_id)<0)
HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "unable to evict tagged metadata")
/* Re-read the superblock. */
if (H5F_super_read(f, dxpl_id) < 0)
HGOTO_ERROR(H5E_FILE, H5E_READERROR, FAIL, "unable to read superblock")
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5F_evict_tagged_metadata */
/*-------------------------------------------------------------------------
* Function: H5F_get_checksums
*
* Purpose: Decode checksum stored in the buffer
* Calculate checksum for the data in the buffer
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi; Sept 2013
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_get_checksums(uint8_t *buf, size_t chk_size, uint32_t *s_chksum/*out*/, uint32_t *c_chksum/*out*/)
{
uint32_t stored_chksum; /* Stored metadata checksum value */
uint32_t computed_chksum; /* Computed metadata checksum value */
const uint8_t *chk_p; /* Pointer into raw data buffer */
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* Check arguments */
HDassert(buf);
HDassert(chk_size);
/* Compute checksum for the buffer */
computed_chksum = H5_checksum_metadata(buf, chk_size - H5_SIZEOF_CHKSUM, 0);
/* Offset to the checksum in the buffer */
chk_p = buf + chk_size - H5_SIZEOF_CHKSUM;
/* Decode the checksum stored in the buffer */
UINT32DECODE(chk_p, stored_chksum);
/* Return the stored checksum */
if(s_chksum)
*s_chksum = stored_chksum;
/* Return the computed checksum */
if(c_chksum)
*c_chksum = computed_chksum;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5F_get_chksums() */
/*-------------------------------------------------------------------------
* Function: H5F_read_check_meatadata
*
* Purpose: Attempts to read and validate a piece of meatadata that has
* checksum as follows:
* a) read the piece of metadata
* b) calculate checksum for the buffer of metadata
* c) decode the checksum stored in the buffer of metadata
* d) compare the computed checksum with its stored checksum
* The library will perform (a) to (d) above for "f->read_attempts"
* times or until the checksum comparison in (d) passes.
* This routine also tracks the # of retries via
* H5F_track_metadata_read_retries()
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi; Sept 2013
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_read_check_metadata(H5F_t *f, H5FD_mem_t type, H5AC_type_t actype, haddr_t addr, size_t read_size, size_t chk_size,
hid_t dxpl_id, uint8_t *buf/*out*/, uint32_t *chksum/*out*/)
{
size_t tries, max_tries; /* The # of read attempts */
size_t retries; /* The # of retries */
uint32_t stored_chksum; /* Stored metadata checksum value */
uint32_t computed_chksum; /* Computed metadata checksum value */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Get the # of read attempts */
max_tries = tries = f->read_attempts;
do {
/* Read header from disk */
if(H5F_block_read(f, type, addr, read_size, dxpl_id, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "unable to read metadata")
/* Get stored and computed checksums */
H5F_get_checksums(buf, chk_size, &stored_chksum, &computed_chksum);
/* Verify checksum */
if(stored_chksum == computed_chksum)
break;
} while(--tries);
if(tries == 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "incorrect metadatda checksum after all read attempts (%u) for %u bytes:c_chksum=%u, s_chkum=%u",
max_tries, chk_size, computed_chksum, stored_chksum)
/* Calculate and track the # of retries */
retries = max_tries - tries;
if(retries) { /* Does not track 0 retry */
HDfprintf(stderr, "%s: SUCCESS after %u retries; actype=%u\n", FUNC, retries, actype);
if(H5F_track_metadata_read_retries(f, actype, retries) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "cannot track read tries = %u ", retries)
}
/* Return the computed checksum */
if(chksum)
*chksum = computed_chksum;
done:
FUNC_LEAVE_NOAPI(ret_value);
} /* end H5F_read_check_metadata */
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