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/*
* Copyright (C) 1997 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, November 13, 1997
*
* Purpose: A driver that splits the meta data and raw data into two
* separate files. The high-order bit of the file address
* determines whether the address refers to the meta data file
* (high order bit is clear) or the raw data file (high order bit
* is set).
*/
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Fprivate.h>
#include <H5MFprivate.h>
#include <H5MMprivate.h>
/* Default file name extensions */
#define H5F_SPLIT_META_EXT ".meta"
#define H5F_SPLIT_RAW_EXT ".raw"
#define PABLO_MASK H5F_split
static hbool_t interface_initialize_g = FALSE;
#define INTERFACE_INIT NULL
static hbool_t H5F_split_access(const char *name,
const H5F_access_t *access_parms, int mode,
H5F_search_t *key/*out*/);
static H5F_low_t *H5F_split_open(const char *name,
const H5F_access_t *access_parms, uintn flags,
H5F_search_t *key/*out*/);
static herr_t H5F_split_close(H5F_low_t *lf, const H5F_access_t *access_parms);
static herr_t H5F_split_read(H5F_low_t *lf, const H5F_access_t *access_parms,
const H5D_transfer_t xfer_mode,
const haddr_t *addr, size_t size,
uint8 *buf/*out*/);
static herr_t H5F_split_write(H5F_low_t *lf, const H5F_access_t *access_parms,
const H5D_transfer_t xfer_mode,
const haddr_t *addr, size_t size,
const uint8 *buf);
static herr_t H5F_split_flush(H5F_low_t *lf, const H5F_access_t *access_parms);
static herr_t H5F_split_extend(H5F_low_t *lf, const H5F_access_t *access_parms,
intn op, hsize_t size, haddr_t *addr/*out*/);
const H5F_low_class_t H5F_LOW_SPLIT_g[1] = {{
H5F_split_access, /* access method */
H5F_split_open, /* open method */
H5F_split_close, /* close method */
H5F_split_read, /* read method */
H5F_split_write, /* write method */
H5F_split_flush, /* flush method */
H5F_split_extend, /* extend method */
}};
/*
* This is the bit that determines whether the address is part of the meta
* data file or part of the raw data file. Eventually we'll want to pass
* this kind of thing down to this function from above...
*/
#define H5F_SPLIT_MASK 0x80000000
/*-------------------------------------------------------------------------
* Function: H5F_split_open
*
* Purpose: Opens a split meta data/raw data family with the specified
* base name. The name of the meta data file will be created by
* appending `.h5' while the name of the raw data file will be
* created by appending `.raw'.
*
* Return: Success: Low-level file pointer
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static H5F_low_t *
H5F_split_open(const char *name, const H5F_access_t *access_parms,
uintn flags, H5F_search_t *key/*out*/)
{
H5F_low_t *lf = NULL, *ret_value = NULL;
char fullname[4096];
const char *ext; /*file name extension*/
const H5F_low_class_t *meta_type = NULL;
const H5F_low_class_t *raw_type = NULL;
FUNC_ENTER(H5F_split_open, NULL);
assert(name && *name);
assert (access_parms);
assert (H5F_LOW_SPLIT==access_parms->driver);
assert (access_parms->u.split.meta_access);
assert (access_parms->u.split.raw_access);
/* Get member types */
meta_type = H5F_low_class (access_parms->u.split.meta_access->driver);
raw_type = H5F_low_class (access_parms->u.split.raw_access->driver);
/* Create the file descriptor */
lf = H5MM_xcalloc(1, sizeof(H5F_low_t));
lf->u.split.name = H5MM_xstrdup(name);
lf->u.split.mask = H5F_SPLIT_MASK;
/* Open the meta data file */
ext = access_parms->u.split.meta_ext ?
access_parms->u.split.meta_ext : H5F_SPLIT_META_EXT;
if (strlen (name)+strlen (ext) >= sizeof fullname) {
HGOTO_ERROR (H5E_IO, H5E_CANTINIT, NULL, "file name is too long");
}
strcpy (fullname, name);
strcat (fullname, ext);
lf->u.split.meta = H5F_low_open(meta_type, fullname,
access_parms->u.split.meta_access,
flags, key/*out*/);
if (NULL == lf->u.split.meta) {
HGOTO_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "can't open meta file");
}
/* Open the raw data file */
ext = access_parms->u.split.raw_ext ?
access_parms->u.split.raw_ext : H5F_SPLIT_RAW_EXT;
if (strlen (name)+strlen (ext) >= sizeof fullname) {
HGOTO_ERROR (H5E_IO, H5E_CANTINIT, NULL, "file name is too long");
}
strcpy (fullname, name);
strcat (fullname, ext);
lf->u.split.raw = H5F_low_open(raw_type, fullname,
access_parms->u.split.raw_access,
flags, NULL);
if (NULL == lf->u.split.raw) {
HGOTO_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "can't open raw file");
}
/* Initialize the file size */
H5F_low_size(lf->u.split.raw, &(lf->eof));
lf->eof.offset |= lf->u.split.mask;
HRETURN(lf);
done:
if (!ret_value) {
if (lf) {
H5F_split_close(lf, access_parms);
H5MM_xfree(lf);
}
}
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_close
*
* Purpose: Closes a split file.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5F_split_close(H5F_low_t *lf, const H5F_access_t *access_parms)
{
FUNC_ENTER(H5F_split_close, FAIL);
assert(lf);
H5F_low_close(lf->u.split.meta, access_parms->u.split.meta_access);
H5F_low_close(lf->u.split.raw, access_parms->u.split.raw_access);
H5MM_xfree(lf->u.split.name);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_read
*
* Purpose: Reads a chunk of contiguous data from a split file. We
* assume that the data being read never crosses the meta
* data/raw data boundary. Reading past the end of a file
* returns zeros instead of failing.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
* June 2, 1998 Albert Cheng
* Added xfer_mode argument
*
*-------------------------------------------------------------------------
*/
static herr_t
H5F_split_read(H5F_low_t *lf, const H5F_access_t *access_parms,
const H5D_transfer_t xfer_mode,
const haddr_t *addr, size_t size, uint8 *buf/*out*/)
{
haddr_t tmp_addr;
H5F_low_t *sub = NULL;
herr_t status;
const H5F_access_t *sub_parms = NULL;
FUNC_ENTER(H5F_split_read, FAIL);
assert(lf);
assert(addr && H5F_addr_defined(addr));
assert(buf);
assert(xfer_mode != H5D_XFER_COLLECTIVE); /* no collective support */
/* Which file to we actually read from? */
if (addr->offset & lf->u.split.mask) {
sub = lf->u.split.raw;
sub_parms = access_parms->u.split.raw_access;
tmp_addr.offset = addr->offset & (lf->u.split.mask - 1);
} else {
sub = lf->u.split.meta;
sub_parms = access_parms->u.split.meta_access;
tmp_addr = *addr;
}
/* Read the data */
status = H5F_low_read(sub, sub_parms, xfer_mode, &tmp_addr, size, buf/*out*/);
FUNC_LEAVE(status);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_write
*
* Purpose: Writes BUF to either the meta data file or the raw data file.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
* June 2, 1998 Albert Cheng
* Added xfer_mode argument
*
*-------------------------------------------------------------------------
*/
static herr_t
H5F_split_write(H5F_low_t *lf, const H5F_access_t *access_parms,
const H5D_transfer_t xfer_mode,
const haddr_t *addr, size_t size, const uint8 *buf)
{
haddr_t tmp_addr;
H5F_low_t *sub = NULL;
herr_t status;
const H5F_access_t *sub_parms = NULL;
FUNC_ENTER(H5F_split_write, FAIL);
assert(lf);
assert(addr && H5F_addr_defined(addr));
assert(buf);
assert(xfer_mode != H5D_XFER_COLLECTIVE); /* no collective support */
/* Which file to we actually write to? */
if (addr->offset & lf->u.split.mask) {
sub = lf->u.split.raw;
sub_parms = access_parms->u.split.raw_access;
tmp_addr.offset = addr->offset & (lf->u.split.mask - 1);
} else {
sub = lf->u.split.meta;
sub_parms = access_parms->u.split.meta_access;
tmp_addr = *addr;
}
/* Write the data */
status = H5F_low_write(sub, sub_parms, xfer_mode, &tmp_addr, size, buf);
FUNC_LEAVE(status);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_flush
*
* Purpose: Flushes all data to disk.
*
* Return: Success: SUCCEED
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5F_split_flush(H5F_low_t *lf, const H5F_access_t *access_parms)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER(H5F_split_flush, FAIL);
assert(lf);
ret_value = (H5F_low_flush(lf->u.split.meta,
access_parms->u.split.meta_access) >= 0 &&
H5F_low_flush(lf->u.split.raw,
access_parms->u.split.raw_access) >= 0);
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_access
*
* Purpose: Determines if both members of the split data file family can
* be accessed and returns the key for the first member of the
* family.
*
* Return: Success: TRUE or FALSE
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Monday, November 13, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static hbool_t
H5F_split_access(const char *name, const H5F_access_t *access_parms,
int mode, H5F_search_t *key/*out*/)
{
char fullname[4096];
hbool_t status;
const char *ext; /*file extension*/
const H5F_low_class_t *meta_type = NULL;
const H5F_low_class_t *raw_type = NULL;
FUNC_ENTER(H5F_split_access, FAIL);
assert(name && *name);
assert (access_parms);
assert (H5F_LOW_SPLIT==access_parms->driver);
assert (access_parms->u.split.meta_access);
assert (access_parms->u.split.raw_access);
/* The meta data member */
meta_type = H5F_low_class (access_parms->u.split.meta_access->driver);
ext = access_parms->u.split.meta_ext ?
access_parms->u.split.meta_ext : H5F_SPLIT_META_EXT;
if (strlen (name)+strlen (ext) >= sizeof fullname) {
HRETURN_ERROR (H5E_IO, H5E_CANTINIT, FAIL, "file name is too long");
}
strcpy (fullname, name);
strcat (fullname, ext);
status = H5F_low_access(meta_type, fullname,
access_parms->u.split.meta_access,
mode, key/*out*/);
if (status < 0) {
HRETURN_ERROR(H5E_IO, H5E_CANTINIT, FAIL,
"access call failed for meta data member");
}
if (!status) HRETURN(FALSE);
/* The raw data member */
raw_type = H5F_low_class (access_parms->u.split.raw_access->driver);
ext = access_parms->u.split.raw_ext ?
access_parms->u.split.raw_ext : H5F_SPLIT_RAW_EXT;
if (strlen (name)+strlen (ext) >= sizeof fullname) {
HRETURN_ERROR (H5E_IO, H5E_CANTINIT, FAIL, "file name is too long");
}
strcpy (fullname, name);
strcat (fullname, ext);
status = H5F_low_access(raw_type, fullname,
access_parms->u.split.raw_access,
mode, NULL/*out*/);
if (status < 0) {
HRETURN_ERROR(H5E_IO, H5E_CANTINIT, FAIL,
"access call failed for raw data member");
}
FUNC_LEAVE(status);
}
/*-------------------------------------------------------------------------
* Function: H5F_split_extend
*
* Purpose: Allocates memory from the end of the meta data file or raw
* data file.
*
* Return: Success: SUCCEED with the address of the allocated
* memory returned through the ADDR argument.
*
* Failure: FAIL
*
* Programmer: Robb Matzke
* Thursday, November 13, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5F_split_extend(H5F_low_t *lf, const H5F_access_t *access_parms, intn op,
hsize_t size, haddr_t *addr/*out*/)
{
FUNC_ENTER(H5F_split_extend, FAIL);
assert(lf);
assert(H5MF_META == op || H5MF_RAW == op);
assert(size > 0);
assert(addr);
if (H5MF_META == op) {
if (H5F_low_extend(lf->u.split.meta, access_parms->u.split.meta_access,
op, size, addr/*out*/)<0) {
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"meta data allocation failed");
}
if (addr->offset + size > lf->eof.offset) {
lf->eof.offset = addr->offset + size;
}
} else {
if (H5F_low_extend(lf->u.split.raw, access_parms->u.split.raw_access,
op, size, addr/*out*/)<0) {
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"raw data allocation failed");
}
addr->offset |= lf->u.split.mask;
lf->eof = lf->u.split.raw->eof;
lf->eof.offset |= lf->u.split.mask;
}
FUNC_LEAVE(SUCCEED);
}
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