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/*
* Copyright © 1999 NCSA
* All rights reserved.
*
* Programmer: Saurabh Bagchi (bagchi@uiuc.edu)
* Thursday, August 12 -Tuesday, August 17, 1999
*
* Purpose: This is the GASS I/O driver.
*
*/
#include "H5private.h" /*library functions */
#include "H5Eprivate.h" /*error handling */
#include "H5Fprivate.h" /*files */
#include "H5FDprivate.h" /*file driver */
#include "H5FDgass.h" /*core file driver */
#include "H5MMprivate.h" /*memory allocation */
#include "H5Pprivate.h" /*property lists */
#undef MAX
#define MAX(X,Y) ((X)>(Y)?(X):(Y))
/* The driver identification number, initialized at runtime */
static hid_t H5FD_GASS_g = 0;
#ifdef H5_HAVE_GASS
/* File operations */
#define OP_UNKNOWN 0
#define OP_READ 1
#define OP_WRITE 2
/*
* The description of a file belonging to this driver. The `eoa' and `eof'
* determine the amount of hdf5 address space in use and the high-water mark
* of the file (the current size of the underlying Unix file). The `pos'
* value is used to eliminate file position updates when they would be a
* no-op. Unfortunately we've found systems that use separate file position
* indicators for reading and writing so the lseek can only be eliminated if
* the current operation is the same as the previous operation. When opening
* a file the `eof' will be set to the current file size, `eoa' will be set
* to zero, `pos' will be set to H5F_ADDR_UNDEF (as it is when an error
* occurs), and `op' will be set to H5F_OP_UNKNOWN.
*/
typedef struct H5FD_gass_t {
H5FD_t pub; /*public stuff, must be first */
int fd; /*the unix file */
GASS_Info info; /*file information */
haddr_t eoa; /*end of allocated region */
haddr_t eof; /*end of file; current file size*/
haddr_t pos; /*current file I/O position */
int op; /*last operation */
} H5FD_gass_t;
/*
* These macros check for overflow of various quantities. These macros
* assume that file_offset_t is signed and haddr_t and size_t are unsigned.
*
* ADDR_OVERFLOW: Checks whether a file address of type `haddr_t'
* is too large to be represented by the second argument
* of the file seek function.
*
* SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too
* large to be represented by the `size_t' type.
*
* REGION_OVERFLOW: Checks whether an address and size pair describe data
* which can be addressed entirely by the second
* argument of the file seek function.
*/
#define MAXADDR (((haddr_t)1<<(8*sizeof(file_offset_t)-1))-1)
#define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || \
((A) & ~(haddr_t)MAXADDR))
#define SIZE_OVERFLOW(Z) ((Z) & ~(hsize_t)MAXADDR)
#define REGION_OVERFLOW(A,Z) (ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) || \
sizeof(file_offset_t)<sizeof(size_t) || \
HADDR_UNDEF==(A)+(Z) || \
(file_offset_t)((A)+(Z))<(file_offset_t)(A))
/* Prototypes */
static H5FD_t *H5FD_gass_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr);
static herr_t H5FD_gass_close(H5FD_t *_file);
static herr_t H5FD_gass_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_gass_get_eoa(H5FD_t *_file);
static herr_t H5FD_gass_set_eoa(H5FD_t *_file, haddr_t addr);
static haddr_t H5FD_gass_get_eof(H5FD_t *_file);
static herr_t H5FD_gass_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
hsize_t size, void *buf);
static herr_t H5FD_gass_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
hsize_t size, const void *buf);
/* GASS I/O-specific file access properties */
typedef struct H5FD_gass_fapl_t {
GASS_Info info; /* access property parameters */
} H5FD_gass_fapl_t;
/* The GASS IO driver information */
static const H5FD_class_t H5FD_gass_g = {
"gass", /*name */
MAXADDR, /*maxaddr */
NULL, /*sb_size */
NULL, /*sb_encode */
NULL, /*sb_decode */
sizeof(H5FD_gass_fapl_t), /*fapl_size */
NULL, /*fapl_get */
NULL, /*fapl_copy */
NULL, /*fapl_free */
0, /*dxpl_size */
NULL, /*dxpl_copy */
NULL, /*dxpl_free */
H5FD_gass_open, /*open */
H5FD_gass_close, /*close */
NULL, /*cmp */
H5FD_gass_query, /*query */
NULL, /*alloc */
NULL, /*free */
H5FD_gass_get_eoa, /*get_eoa */
H5FD_gass_set_eoa, /*set_eoa */
H5FD_gass_get_eof, /*get_eof */
H5FD_gass_read, /*read */
H5FD_gass_write, /*write */
NULL, /*flush */
H5FD_FLMAP_SINGLE, /*fl_map */
};
/* Interface initialization */
#define PABLO_MASK H5FD_gass_mask
#define INTERFACE_INIT H5FD_gass_init
static intn interface_initialize_g = 0;
/*-------------------------------------------------------------------------
* Function: H5FD_gass_init
*
* Purpose: Initialize this driver by registering the driver with the
* library.
*
* Return: Success: The driver ID for the gass driver.
*
* Failure: Negative.
*
* Programmer: Saurabh Bagchi
* Friday, August 13, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
hid_t
H5FD_gass_init(void)
{
FUNC_ENTER(H5FD_gass_init, FAIL);
if (!H5FD_GASS_g)
H5FD_GASS_g = H5FDregister(&H5FD_gass_g);
globus_module_activate (GLOBUS_COMMON_MODULE);
globus_module_activate (GLOBUS_GASS_FILE_MODULE);
FUNC_LEAVE(H5FD_GASS_g);
}
/*-------------------------------------------------------------------------
* Function: H5Pset_fapl_gass
*
* Purpose: Store the user supplied GASS INFO in
* the file access property list FAPL_ID which can then be used
* to create and/or open the file.
*
* GASS info object to be used for file open using GASS.
* Any modification to info after
* this function call returns may have undetermined effect
* to the access property list. Users should call this
* function again to setup the property list.
*
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Saurabh Bagchi
* Friday, August 13, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_fapl_gass(hid_t fapl_id, GASS_Info info)
{
herr_t ret_value=FAIL;
H5FD_gass_fapl_t fa;
FUNC_ENTER(H5Pset_fapl_gass, FAIL);
/* Check arguments */
if (H5P_FILE_ACCESS!=H5Pget_class(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a fapl");
#ifdef LATER
#warning "We need to verify that INFO contain sensible information."
#endif
/* Initialize driver specific properties */
fa.info = info;
ret_value= H5Pset_driver(fapl_id, H5FD_GASS, &fa);
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5Pget_fapl_gass
*
* Purpose: If the file access property list is set to the H5FD_GASS
* driver then this function returns the GASS info object
* through the INFO pointer.
*
* Return: Success: Non-negative with the info object returned
* through the INFO arguments if non-null.
* The information is copied and it is therefore
* valid only until the file access property
* list is modified or closed.
*
* Failure: Negative
*
* Programmer: Saurabh Bagchi
* Friday, August 13, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_fapl_gass(hid_t fapl_id, GASS_Info *info/*out*/)
{
H5FD_gass_fapl_t *fa;
FUNC_ENTER(H5Pget_fapl_gass, FAIL);
H5TRACE2("e","ix",fapl_id,info);
if (H5P_FILE_ACCESS!=H5Pget_class(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a fapl");
if (H5FD_GASS!=H5P_get_driver(fapl_id))
HRETURN_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver");
if (NULL==(fa=H5Pget_driver_info(fapl_id)))
HRETURN_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info");
if (info)
*info = fa->info;
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_open
*
* Purpose: Opens a file with name NAME. The FLAGS are a bit field with
* purpose similar to the second argument of open(2) and which
* are defined in H5Fpublic.h. The file access property list
* FAPL_ID contains the driver properties and MAXADDR
* is the largest address which this file will be expected to
* access.
*
* Return: Success: A pointer to a new file data structure. The
* public fields will be initialized by the
* caller, which is always H5FD_open().
*
* Failure: NULL
*
* Programmer: Saurabh Bagchi
* Friday, August 13, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static H5FD_t *
H5FD_gass_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr)
{
int fd;
struct stat sb;
H5FD_gass_t *file=NULL;
const H5FD_gass_fapl_t *fa=NULL;
H5FD_gass_fapl_t _fa;
char *filename = (char *) H5MM_malloc(80 * sizeof(char));
FUNC_ENTER(H5FD_gass_open, NULL);
/* fprintf(stdout, "Entering H5FD_gass_open name=%s flags=0x%x\n", name, flags); */
/* Check arguments */
if (!name || !*name)
HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name");
if (0==maxaddr || HADDR_UNDEF==maxaddr)
HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr");
if (ADDR_OVERFLOW(maxaddr))
HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr");
strcpy (filename, name);
/* Obtain a pointer to gass-specific file access properties */
if (H5P_DEFAULT==fapl_id || H5FD_GASS!=H5P_get_driver(fapl_id)) {
GASS_INFO_NULL (_fa.info);
/* _fa.info = GASS_INFO_NULL; */
/* _fa.info = {0,0}; */ /*default*/
fa = &_fa;
} else {
fa = H5Pget_driver_info(fapl_id);
assert(fa);
}
/* When I come down here, the possible flag values and the correct
responses are given here :-
1. H5F_ACC_CREAT | H5F_ACC_RDWR | H5F_ACC_EXCL : The file is
a new one. Go ahead and open it in O_RDWR.
2. H5F_ACC_CREAT | H5F_ACC_RDWR | H5F_ACC_TRUNC : Use
O_RDWR | O_TRUNC with gass_open.
3. H5F_ACC_RDWR | H5F_ACC_TRUNC : File already exists. Truncate it.
4. H5F_ACC_RDWR : Use O_RDWR with gass_open
5. H5F_ACC_RDWR is not set : Use O_RDONLY with gass_open
One reason why we cannot simply pass on the flags to gass_open
is that gass_open does not support many of them (e.g., O_CREAT)
*/
if ((flags & H5F_ACC_CREAT) && (flags & H5F_ACC_RDWR) && (flags & H5F_ACC_EXCL)) {
if ((fd = globus_gass_open (filename, O_RDWR|O_TRUNC)) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
}
else if ((flags & H5F_ACC_CREAT) && (flags & H5F_ACC_RDWR) && (flags & H5F_ACC_TRUNC)) {
if ((fd = globus_gass_open (filename, O_RDWR|O_TRUNC)) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
}
else if ((flags & H5F_ACC_RDWR) && (flags & H5F_ACC_TRUNC)) {
if ((fd = globus_gass_open (filename, O_RDWR|O_TRUNC)) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
}
else if (flags & H5F_ACC_RDWR) {
printf ("I'm here in H5FDgass_open going to call globus_gass_open with O_RDWR. \n");
printf ("Name of URL =%s \n", filename);
if ((fd = globus_gass_open (filename, O_RDWR)) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
}
else { /* This is case where H5F_ACC_RDWR is not set */
if ((fd = globus_gass_open (filename, O_RDONLY)) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL, "open failed");
}
if (fstat(fd, &sb)<0) {
close(fd);
HRETURN_ERROR(H5E_IO, H5E_BADFILE, NULL, "fstat failed");
}
/* Create the new file struct */
if (NULL==(file=H5MM_calloc(sizeof(H5FD_gass_t))))
HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "can't allocate file struct");
file->fd = fd;
file->eof = sb.st_size;
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
file->info = fa->info;
FUNC_LEAVE((H5FD_t*)file);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_close
*
* Purpose: Closes a GASS file.
*
* Return: Success: 0
*
* Failure: -1, file not closed.
*
* Programmer: Saurabh Bagchi
* Monday, August 16, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_gass_close (H5FD_t *_file)
{
H5FD_gass_t *file = (H5FD_gass_t *)_file;
FUNC_ENTER(H5FD_gass_close, FAIL);
if (file == NULL)
HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file handle");
if (globus_gass_close (file->fd) < 0)
HRETURN_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "can't close GASS file");
H5MM_xfree(file);
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_query
*
* Purpose: Set the flags that this VFL driver is capable of supporting.
* (listed in H5FDpublic.h)
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* Tuesday, September 26, 2000
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_gass_query(const UNUSED H5FD_t *_f, unsigned long *flags /* out */)
{
herr_t ret_value=SUCCEED;
FUNC_ENTER(H5FD_gass_query, FAIL);
/* Set the VFL feature flags that this driver supports */
if(flags) {
*flags = 0;
*flags|=H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */
}
FUNC_LEAVE(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_get_eoa
*
* Purpose: Gets the end-of-address marker for the file. The EOA marker
* is the first address past the last byte allocated in the
* format address space.
*
* Return: Success: The end-of-address marker.
*
* Failure: HADDR_UNDEF
*
* Programmer: Saurabh Bagchi
* Monday, August 16, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_gass_get_eoa(H5FD_t *_file)
{
H5FD_gass_t *file = (H5FD_gass_t *)_file;
FUNC_ENTER(H5FD_gass_get_eoa, HADDR_UNDEF);
FUNC_LEAVE(file->eoa);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_set_eoa
*
* Purpose: Set the end-of-address marker for the file. This function is
* called shortly after an existing HDF5 file is opened in order
* to tell the driver where the end of the HDF5 data is located.
*
* Return: Success: 0
*
* Programmer: Saurabh Bagchi
* Monday, August 16, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_gass_set_eoa(H5FD_t *_file, haddr_t addr)
{
H5FD_gass_t *file = (H5FD_gass_t *)_file;
FUNC_ENTER(H5FD_gass_set_eoa, FAIL);
file->eoa = addr;
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_get_eof
*
* Purpose: Returns the end-of-file marker, which is the greater of
* either the Unix end-of-file or the HDF5 end-of-address
* markers.
*
* Return: Success: End of file address, the first address past
* the end of the "file", either the Unix file
* or the HDF5 file.
*
* Failure: HADDR_UNDEF
*
* Programmer: Saurabh Bagchi
* Monday, August 16, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_gass_get_eof(H5FD_t *_file)
{
H5FD_gass_t *file = (H5FD_gass_t*)_file;
FUNC_ENTER(H5FD_gass_get_eof, HADDR_UNDEF);
FUNC_LEAVE(MAX(file->eof, file->eoa));
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_read
*
* Purpose: Reads SIZE bytes of data from FILE beginning at address ADDR
* into buffer BUF.
*
* Return: Success: Zero. Result is stored in caller-supplied
* buffer BUF.
*
* Failure: -1, Contents of buffer BUF are undefined.
*
* Programmer: Saurabh Bagchi
* Monday, August 16, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_gass_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t dxpl_id/*unused*/, haddr_t addr,
hsize_t size, void *buf/*out*/)
{
H5FD_gass_t *file = (H5FD_gass_t*)_file;
ssize_t nbytes;
FUNC_ENTER(H5FD_gass_read, FAIL);
assert(file && file->pub.cls);
assert(buf);
/* Check for overflow conditions */
if (HADDR_UNDEF==addr)
HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "addr undefined");
if (REGION_OVERFLOW(addr, size))
HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large");
if (addr+size>file->eoa)
HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large");
/* Seek to the correct location */
if ((addr!=file->pos || OP_READ!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0) {
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "gass file seek failed");
}
/*
* Read data, being careful of interrupted system calls, partial results,
* and the end of the file.
*/
while (size>0) {
do
nbytes = read(file->fd, buf, size);
while (-1==nbytes && EINTR==errno);
if (-1==nbytes) {
/* error */
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
HRETURN_ERROR(H5E_IO, H5E_READERROR, FAIL, "gass file read failed");
}
if (0==nbytes) {
/* end of file but not end of format address space */
memset(buf, 0, size);
size = 0;
}
assert(nbytes>=0);
assert((hsize_t)nbytes<=size);
size -= (hsize_t)nbytes;
addr += (haddr_t)nbytes;
buf = (char*)buf + nbytes;
}
/* Update current position */
file->pos = addr;
file->op = OP_READ;
FUNC_LEAVE(SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5FD_gass_write
*
* Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR
* from buffer BUF.
*
* Return: Success: Zero
*
* Failure: -1
*
* Programmer: Saurabh Bagchi
* Tuesday, August 17, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_gass_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id/*unused*/, haddr_t addr,
hsize_t size, const void *buf)
{
H5FD_gass_t *file = (H5FD_gass_t*)_file;
ssize_t nbytes;
FUNC_ENTER(H5FD_gass_write, FAIL);
assert(file && file->pub.cls);
assert(buf);
/* Check for overflow conditions */
if (HADDR_UNDEF==addr)
HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "addr undefined");
if (REGION_OVERFLOW(addr, size))
HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large");
if (addr+size>file->eoa)
HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large");
/* Seek to the correct location */
if ((addr!=file->pos || OP_WRITE!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0) {
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "gass file seek failed");
}
/*
* Write the data, being careful of interrupted system calls and partial
* results
*/
while (size>0) {
do
nbytes = write(file->fd, buf, size);
while (-1==nbytes && EINTR==errno);
if (-1==nbytes) {
/* error */
file->pos = HADDR_UNDEF;
file->op = OP_UNKNOWN;
HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "gass file write failed");
}
assert(nbytes>0);
assert((hsize_t)nbytes<=size);
size -= (hsize_t)nbytes;
addr += (haddr_t)nbytes;
buf = (const char*)buf + nbytes;
}
/* Update current position and eof */
file->pos = addr;
file->op = OP_WRITE;
if (file->pos>file->eof)
file->eof = file->pos;
FUNC_LEAVE(SUCCEED);
}
#endif /* H5_HAVE_GASS */
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