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H5VLdsetsplit.c
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H5VLdsetsplit.c
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/*Copyright 2021 Hewlett Packard Enterprise Development LP.*/
/*
* Purpose: "dset-split" VOL connector, creates datasets as seperate files,
* which are mounted as LINKS inside the main file. This is to enable versioning at a dataset level.
*/
/* Header files needed */
/* Do NOT include private HDF5 files here! */
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <sys/stat.h>
/* Public HDF5 file */
#include "hdf5.h"
/* This connector's header */
#include "H5VLdsetsplit.h"
#include "H5VLerror.h"
/**********/
/* Macros */
/**********/
/* Whether to display log messge when callback is invoked */
/* (Uncomment to enable) */
//#define DEBUG
//
/* Hack for missing va_copy() in old Visual Studio editions
* (from H5win2_defs.h - used on VS2012 and earlier)
*/
#if defined(_WIN32) && defined(_MSC_VER) && (_MSC_VER < 1800)
#define va_copy(D, S) ((D) = (S))
#endif
/* Version of external link format */
#define H5L_EXT_VERSION 0
/* Valid flags for external links */
#define H5L_EXT_FLAGS_ALL 0
/*Length of filename extention (.h5)*/
const uint8_t H5_EXT_LENGTH = 6;
const char FILE_EXTENTION[] = ".split";
const char ATTRIBUTE_NAME[] = "split_file";
/************/
/* Typedefs */
/************/
/* The dset_split VOL info object */
typedef struct H5VL_dset_split_t {
hid_t under_vol_id; /* ID for underlying VOL connector */
void *under_object; /* Info object for underlying VOL connector */
H5I_type_t type;
hid_t fid;
int set;
} H5VL_dset_split_t;
/* The dset_split VOL wrapper context */
typedef struct H5VL_dset_split_wrap_ctx_t {
hid_t under_vol_id; /* VOL ID for under VOL */
void *under_wrap_ctx; /* Object wrapping context for under VOL */
} H5VL_dset_split_wrap_ctx_t;
/********************* */
/* Function prototypes */
/********************* */
/* Helper routines */
static H5VL_dset_split_t *H5VL_dset_split_new_obj(void *under_obj, hid_t under_vol_id);
static herr_t H5VL_dset_split_free_obj(H5VL_dset_split_t *obj);
herr_t dset_split_create_attribute(hid_t file_id);
hid_t dset_split_file_create(const char* name, void* obj, H5I_type_t obj_type, hid_t connector_id);
hid_t get_parent_file_fapl(void* file_obj, hid_t connector_id);
/* Management callbacks */
static herr_t H5VL_dset_split_init(hid_t vipl_id);
static herr_t H5VL_dset_split_term(void);
/* VOL info callbacks */
static void * H5VL_dset_split_info_copy(const void *info);
static herr_t H5VL_dset_split_info_cmp(int *cmp_value, const void *info1, const void *info2);
static herr_t H5VL_dset_split_info_free(void *info);
static herr_t H5VL_dset_split_info_to_str(const void *info, char **str);
static herr_t H5VL_dset_split_str_to_info(const char *str, void **info);
/* VOL object wrap / retrieval callbacks */
static void * H5VL_dset_split_get_object(const void *obj);
static herr_t H5VL_dset_split_get_wrap_ctx(const void *obj, void **wrap_ctx);
static void * H5VL_dset_split_wrap_object(void *obj, H5I_type_t obj_type, void *wrap_ctx);
static void * H5VL_dset_split_unwrap_object(void *obj);
static herr_t H5VL_dset_split_free_wrap_ctx(void *obj);
/* Attribute callbacks */
static void * H5VL_dset_split_attr_create(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t type_id, hid_t space_id, hid_t acpl_id, hid_t aapl_id,
hid_t dxpl_id, void **req);
static void * H5VL_dset_split_attr_open(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t aapl_id, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_attr_read(void *attr, hid_t mem_type_id, void *buf, hid_t dxpl_id,
void **req);
static herr_t H5VL_dset_split_attr_write(void *attr, hid_t mem_type_id, const void *buf, hid_t dxpl_id,
void **req);
static herr_t H5VL_dset_split_attr_get(void *obj, H5VL_attr_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_attr_specific(void *obj, const H5VL_loc_params_t *loc_params,
H5VL_attr_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_attr_optional(void *obj, H5VL_optional_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_attr_close(void *attr, hid_t dxpl_id, void **req);
/* Dataset callbacks */
static void * H5VL_dset_split_dataset_create(void *obj, const H5VL_loc_params_t *loc_params,
const char *name, hid_t lcpl_id, hid_t type_id, hid_t space_id,
hid_t dcpl_id, hid_t dapl_id, hid_t dxpl_id, void **req);
static void * H5VL_dset_split_dataset_open(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t dapl_id, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_dataset_read(void *dset, hid_t mem_type_id, hid_t mem_space_id,
hid_t file_space_id, hid_t plist_id, void *buf, void **req);
static herr_t H5VL_dset_split_dataset_write(void *dset, hid_t mem_type_id, hid_t mem_space_id,
hid_t file_space_id, hid_t plist_id, const void *buf,
void **req);
static herr_t H5VL_dset_split_dataset_get(void *dset, H5VL_dataset_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_dataset_specific(void *obj, H5VL_dataset_specific_args_t *args, hid_t dxpl_id,
void **req);
static herr_t H5VL_dset_split_dataset_optional(void *obj, H5VL_optional_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_dataset_close(void *dset, hid_t dxpl_id, void **req);
/* Datatype callbacks */
static void *H5VL_dset_split_datatype_commit(void *obj, const H5VL_loc_params_t *loc_params,
const char *name, hid_t type_id, hid_t lcpl_id, hid_t tcpl_id,
hid_t tapl_id, hid_t dxpl_id, void **req);
static void *H5VL_dset_split_datatype_open(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t tapl_id, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_datatype_get(void *dt, H5VL_datatype_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_datatype_specific(void *obj, H5VL_datatype_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_datatype_optional(void *obj, H5VL_optional_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_datatype_close(void *dt, hid_t dxpl_id, void **req);
/* File callbacks */
static void * H5VL_dset_split_file_create(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
hid_t dxpl_id, void **req);
static void * H5VL_dset_split_file_open(const char *name, unsigned flags, hid_t fapl_id, hid_t dxpl_id,
void **req);
static herr_t H5VL_dset_split_file_get(void *file, H5VL_file_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_file_specific(void *file, H5VL_file_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_file_optional(void *file, H5VL_optional_args_t *args, hid_t dxpl_id,
void **req);
static herr_t H5VL_dset_split_file_close(void *file, hid_t dxpl_id, void **req);
/* Group callbacks */
static void * H5VL_dset_split_group_create(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t lcpl_id, hid_t gcpl_id, hid_t gapl_id, hid_t dxpl_id,
void **req);
static void * H5VL_dset_split_group_open(void *obj, const H5VL_loc_params_t *loc_params, const char *name,
hid_t gapl_id, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_group_get(void *obj, H5VL_group_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_group_specific(void *obj, H5VL_group_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_group_optional(void *obj, H5VL_optional_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_group_close(void *grp, hid_t dxpl_id, void **req);
/* Link callbacks */
static herr_t H5VL_dset_split_link_create(H5VL_link_create_args_t *args, void *obj,
const H5VL_loc_params_t *loc_params, hid_t lcpl_id, hid_t lapl_id,
hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_link_copy(void *src_obj, const H5VL_loc_params_t *loc_params1, void *dst_obj,
const H5VL_loc_params_t *loc_params2, hid_t lcpl_id, hid_t lapl_id,
hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_link_move(void *src_obj, const H5VL_loc_params_t *loc_params1, void *dst_obj,
const H5VL_loc_params_t *loc_params2, hid_t lcpl_id, hid_t lapl_id,
hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_link_get(void *obj, const H5VL_loc_params_t *loc_params,
H5VL_link_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_link_specific(void *obj, const H5VL_loc_params_t *loc_params,
H5VL_link_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_link_optional(void *obj, const H5VL_loc_params_t *loc_params, H5VL_optional_args_t *args,
hid_t dxpl_id, void **req);
/* Object callbacks */
static void * H5VL_dset_split_object_open(void *obj, const H5VL_loc_params_t *loc_params,
H5I_type_t *opened_type, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_object_copy(void *src_obj, const H5VL_loc_params_t *src_loc_params,
const char *src_name, void *dst_obj,
const H5VL_loc_params_t *dst_loc_params, const char *dst_name,
hid_t ocpypl_id, hid_t lcpl_id, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_object_get(void *obj, const H5VL_loc_params_t *loc_params,
H5VL_object_get_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_object_specific(void *obj, const H5VL_loc_params_t *loc_params,
H5VL_object_specific_args_t *args, hid_t dxpl_id, void **req);
static herr_t H5VL_dset_split_object_optional(void *obj, const H5VL_loc_params_t *loc_params, H5VL_optional_args_t *args,
hid_t dxpl_id, void **req);
/* Container/connector introspection callbacks */
static herr_t H5VL_dset_split_introspect_get_conn_cls(void *obj, H5VL_get_conn_lvl_t lvl,
const H5VL_class_t **conn_cls);
static herr_t H5VL_dset_split_introspect_get_cap_flags(const void *info, unsigned *cap_flags);
static herr_t H5VL_dset_split_introspect_opt_query(void *obj, H5VL_subclass_t cls, int opt_type,
uint64_t *flags);
/* Async request callbacks */
static herr_t H5VL_dset_split_request_wait(void *req, uint64_t timeout, H5VL_request_status_t *status);
static herr_t H5VL_dset_split_request_notify(void *obj, H5VL_request_notify_t cb, void *ctx);
static herr_t H5VL_dset_split_request_cancel(void *req, H5VL_request_status_t *status);
static herr_t H5VL_dset_split_request_specific(void *req, H5VL_request_specific_args_t *args);
static herr_t H5VL_dset_split_request_optional(void *obj, H5VL_optional_args_t *args);
static herr_t H5VL_dset_split_request_free(void *req);
/* Blob callbacks */
static herr_t H5VL_dset_split_blob_put(void *obj, const void *buf, size_t size, void *blob_id, void *ctx);
static herr_t H5VL_dset_split_blob_get(void *obj, const void *blob_id, void *buf, size_t size, void *ctx);
static herr_t H5VL_dset_split_blob_specific(void *obj, void *blob_id, H5VL_blob_specific_args_t *args);
static herr_t H5VL_dset_split_blob_optional(void *obj, void *blob_id, H5VL_optional_args_t *args);
/* Token callbacks */
static herr_t H5VL_dset_split_token_cmp(void *obj, const H5O_token_t *token1, const H5O_token_t *token2,
int *cmp_value);
static herr_t H5VL_dset_split_token_to_str(void *obj, H5I_type_t obj_type, const H5O_token_t *token,
char **token_str);
static herr_t H5VL_dset_split_token_from_str(void *obj, H5I_type_t obj_type, const char *token_str,
H5O_token_t *token);
/* Generic optional callback */
static herr_t H5VL_dset_split_optional(void *obj, H5VL_optional_args_t *args, hid_t dxpl_id, void **req);
/*******************/
/* Local variables */
/*******************/
/* Split file VOL connector class struct */
static const H5VL_class_t H5VL_dset_split_g = {
H5VL_VERSION, /* VOL class struct version */
(H5VL_class_value_t)H5VL_DSET_SPLIT_VALUE, /* value */
H5VL_DSET_SPLIT_NAME, /* name */
H5VL_DSET_SPLIT_VERSION, /* connector version */
0, /* capability flags */
H5VL_dset_split_init, /* initialize */
H5VL_dset_split_term, /* terminate */
{
/* info_cls */
sizeof(H5VL_dset_split_info_t), /* size */
H5VL_dset_split_info_copy, /* copy */
H5VL_dset_split_info_cmp, /* compare */
H5VL_dset_split_info_free, /* free */
H5VL_dset_split_info_to_str, /* to_str */
H5VL_dset_split_str_to_info /* from_str */
},
{
/* wrap_cls */
H5VL_dset_split_get_object, /* get_object */
H5VL_dset_split_get_wrap_ctx, /* get_wrap_ctx */
H5VL_dset_split_wrap_object, /* wrap_object */
H5VL_dset_split_unwrap_object, /* unwrap_object */
H5VL_dset_split_free_wrap_ctx /* free_wrap_ctx */
},
{
/* attribute_cls */
H5VL_dset_split_attr_create, /* create */
H5VL_dset_split_attr_open, /* open */
H5VL_dset_split_attr_read, /* read */
H5VL_dset_split_attr_write, /* write */
H5VL_dset_split_attr_get, /* get */
H5VL_dset_split_attr_specific, /* specific */
H5VL_dset_split_attr_optional, /* optional */
H5VL_dset_split_attr_close /* close */
},
{
/* dataset_cls */
H5VL_dset_split_dataset_create, /* create */
H5VL_dset_split_dataset_open, /* open */
H5VL_dset_split_dataset_read, /* read */
H5VL_dset_split_dataset_write, /* write */
H5VL_dset_split_dataset_get, /* get */
H5VL_dset_split_dataset_specific, /* specific */
H5VL_dset_split_dataset_optional, /* optional */
H5VL_dset_split_dataset_close /* close */
},
{
/* datatype_cls */
H5VL_dset_split_datatype_commit, /* commit */
H5VL_dset_split_datatype_open, /* open */
H5VL_dset_split_datatype_get, /* get_size */
H5VL_dset_split_datatype_specific, /* specific */
H5VL_dset_split_datatype_optional, /* optional */
H5VL_dset_split_datatype_close /* close */
},
{
/* file_cls */
H5VL_dset_split_file_create, /* create */
H5VL_dset_split_file_open, /* open */
H5VL_dset_split_file_get, /* get */
H5VL_dset_split_file_specific, /* specific */
H5VL_dset_split_file_optional, /* optional */
H5VL_dset_split_file_close /* close */
},
{
/* group_cls */
H5VL_dset_split_group_create, /* create */
H5VL_dset_split_group_open, /* open */
H5VL_dset_split_group_get, /* get */
H5VL_dset_split_group_specific, /* specific */
H5VL_dset_split_group_optional, /* optional */
H5VL_dset_split_group_close /* close */
},
{
/* link_cls */
H5VL_dset_split_link_create, /* create */
H5VL_dset_split_link_copy, /* copy */
H5VL_dset_split_link_move, /* move */
H5VL_dset_split_link_get, /* get */
H5VL_dset_split_link_specific, /* specific */
H5VL_dset_split_link_optional /* optional */
},
{
/* object_cls */
H5VL_dset_split_object_open, /* open */
H5VL_dset_split_object_copy, /* copy */
H5VL_dset_split_object_get, /* get */
H5VL_dset_split_object_specific, /* specific */
H5VL_dset_split_object_optional /* optional */
},
{
/* introspect_cls */
H5VL_dset_split_introspect_get_conn_cls, /* get_conn_cls */
H5VL_dset_split_introspect_get_cap_flags, /* get_cap_flags */
H5VL_dset_split_introspect_opt_query, /* opt_query */
},
{
/* request_cls */
H5VL_dset_split_request_wait, /* wait */
H5VL_dset_split_request_notify, /* notify */
H5VL_dset_split_request_cancel, /* cancel */
H5VL_dset_split_request_specific, /* specific */
H5VL_dset_split_request_optional, /* optional */
H5VL_dset_split_request_free /* free */
},
{
/* blob_cls */
H5VL_dset_split_blob_put, /* put */
H5VL_dset_split_blob_get, /* get */
H5VL_dset_split_blob_specific, /* specific */
H5VL_dset_split_blob_optional /* optional */
},
{
/* token_cls */
H5VL_dset_split_token_cmp, /* cmp */
H5VL_dset_split_token_to_str, /* to_str */
H5VL_dset_split_token_from_str /* from_str */
},
H5VL_dset_split_optional /* optional */
};
H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_VOL;}
const void *H5PLget_plugin_info(void) {return &H5VL_dset_split_g;}
/* The connector identification number, initialized at runtime */
static hid_t H5VL_DSET_SPLIT_g = H5I_INVALID_HID;
hid_t H5VL_ERR_STACK_g = H5I_INVALID_HID;
hid_t H5VL_ERR_CLS_g = H5I_INVALID_HID;
/****Helper Functions*****/
/*-------------------------------------------------------------------------
* Function: dset_split_extlink_create
*
* Purpose: Helper funtion to create the external link
*
* Return: Success: 0
* Failure: -1
*
*-------------------------------------------------------------------------
*/
static herr_t
dset_split_extlink_create(char* file_name,char* dsetname, const char* obj_name, const H5VL_loc_params_t *loc_params, void *vol_obj,
hid_t connector_id, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id, void* req)
{
herr_t ret_value;
size_t file_name_len;
size_t obj_name_len;
size_t buf_size;
void* ext_link_buf = NULL;
uint8_t *p;
H5VL_loc_params_t link_loc_params;
H5VL_link_create_args_t link_args;
file_name_len = strlen(file_name) + 1;
obj_name_len = strlen("/") + 1 + strlen(dsetname) + 1;
buf_size = 1 + file_name_len + obj_name_len;
ext_link_buf = calloc(buf_size, sizeof(char));
/* Encode the external link information */
p = (uint8_t *)ext_link_buf;
*p++ = (H5L_EXT_VERSION << 4) | H5L_EXT_FLAGS_ALL;/* External link version & flags */
strncpy((char *)p, file_name, buf_size-1); /* Name of file containing external link's object */
p += strlen(file_name) + 1;
strcpy((char *)p, "/");
p += strlen("/");
strncpy((char *)p, dsetname, strlen(dsetname));/* External link's object */
link_loc_params.type = H5VL_OBJECT_BY_NAME;
link_loc_params.loc_data.loc_by_name.name = obj_name;
link_loc_params.loc_data.loc_by_name.lapl_id = lapl_id;
link_loc_params.obj_type = loc_params->obj_type;
link_args.op_type = H5VL_LINK_CREATE_UD;
link_args.args.ud.type = H5L_TYPE_EXTERNAL;
link_args.args.ud.buf = ext_link_buf;
link_args.args.ud.buf_size = buf_size;
ret_value = H5VLlink_create(&link_args, vol_obj, &link_loc_params, connector_id, lcpl_id, lapl_id, dxpl_id, req);
#ifdef DEBUG
if (ret_value < 0)
printf("Link creation failed\n");
#endif
if (ext_link_buf)
free(ext_link_buf);
return ret_value;
}
/*-------------------------------------------------------------------------
* Function: get_dataset_name
*
* Purpose: Helper funtion to get dataset name
* Extracts the last token '/'
*
* Return: Success: return last token
* Failure:
*
*-------------------------------------------------------------------------
*/
char*
get_dataset_name(char* path)
{
char* p = strtok(path, "/");
char* temp = p;
while (p != NULL)
{
temp = p;
p = strtok(NULL, "/");
}
return temp;
}
/*-------------------------------------------------------------------------
* Function: get_parent_file_fapl
*
* Purpose: Helper funtion to get parent file access property list
*
* Return: Success: return property id
* Failure: H5I_INVALID_HID
*
*-------------------------------------------------------------------------
*/
hid_t
get_parent_file_fapl(void* file_obj, hid_t connector_id)
{
H5VL_file_get_args_t vol_cb_args;
hid_t ret_value = H5I_INVALID_HID;
FUNC_ENTER_VOL( hid_t, H5I_INVALID_HID)
vol_cb_args.op_type = H5VL_FILE_GET_FAPL;
vol_cb_args.args.get_fapl.fapl_id = H5I_INVALID_HID;
if (H5VLfile_get(file_obj, connector_id, &vol_cb_args, H5P_DATASET_XFER_DEFAULT, NULL) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get file access property list");
ret_value = vol_cb_args.args.get_fapl.fapl_id;
FUNC_RETURN_SET(ret_value);
done:
FUNC_LEAVE_VOL
}
/*-------------------------------------------------------------------------
* Function: get_parent_file_fcpl
*
* Purpose: Helper funtion to get parent file creation property list
*
*
* Return: Success: return property id
* Failure: H5I_INVALID_HID
*
*-------------------------------------------------------------------------
*/
hid_t
get_parent_file_fcpl(void* file_obj, hid_t connector_id)
{
hid_t ret_value = H5I_INVALID_HID;
H5VL_file_get_args_t vol_cb_args;
FUNC_ENTER_VOL( hid_t, H5I_INVALID_HID)
vol_cb_args.op_type = H5VL_FILE_GET_FCPL;
vol_cb_args.args.get_fcpl.fcpl_id = H5I_INVALID_HID;
if (H5VLfile_get(file_obj, connector_id, &vol_cb_args, H5P_DATASET_XFER_DEFAULT, NULL) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get file create property list");
ret_value = vol_cb_args.args.get_fcpl.fcpl_id;
FUNC_RETURN_SET(ret_value);
done:
FUNC_LEAVE_VOL
}
/*-------------------------------------------------------------------------
* Function: get_file_name
*
* Purpose: Helper funtion to get file name
*
*
* Return: Success: Filename length
* Failure: -1
*-------------------------------------------------------------------------
*/
size_t
get_file_name(void* obj, hid_t connector_id, H5I_type_t type, char* name, size_t size)
{
H5VL_file_get_args_t vol_cb_args;
size_t file_name_len = 0; /* Length of file name */
size_t ret_value = -1; /* Return value */
FUNC_ENTER_VOL( size_t, -1)
vol_cb_args.op_type = H5VL_FILE_GET_NAME;
vol_cb_args.args.get_name.type = type;
vol_cb_args.args.get_name.buf_size = size;
vol_cb_args.args.get_name.buf = name;
vol_cb_args.args.get_name.file_name_len = &file_name_len;
if (H5VLfile_get(obj, connector_id, &vol_cb_args, H5P_DATASET_XFER_DEFAULT, NULL) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTGET, (-1), "unable to get file name");
/* Set the return value */
ret_value = (size_t)file_name_len;
FUNC_RETURN_SET(ret_value);
done:
FUNC_LEAVE_VOL
}
/*-------------------------------------------------------------------------
* Function: dset_split_file_create
*
* Purpose: Helper funtion to create file
*
*
* Return: Success: 0
* Failure: -1
*
*-------------------------------------------------------------------------
*/
hid_t
dset_split_file_create(const char* name, void* obj, H5I_type_t obj_type, hid_t connector_id)
{
hid_t file_id = -1;
void * vol_obj_file = NULL;
H5VL_object_get_args_t vol_cb_args;
H5VL_loc_params_t loc_params;
FUNC_ENTER_VOL( hid_t, H5I_INVALID_HID)
loc_params.type = H5VL_OBJECT_BY_SELF;
loc_params.obj_type = obj_type;
vol_cb_args.op_type = H5VL_OBJECT_GET_FILE;
vol_cb_args.args.get_file.file = &vol_obj_file;
if (H5VLobject_get(obj, &loc_params, connector_id, &vol_cb_args, H5P_DATASET_XFER_DEFAULT, NULL) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't retrieve file from object");
hid_t pfcpl_id = get_parent_file_fcpl(vol_obj_file, connector_id);
hid_t fcpl_id = H5Pcopy(pfcpl_id);
hid_t pfapl_id = get_parent_file_fapl(vol_obj_file, connector_id);
hid_t fapl_id = H5Pcopy(pfapl_id);
file_id = H5Fcreate(name, H5F_ACC_EXCL, fcpl_id, fapl_id);
H5Pclose(fapl_id);
H5Pclose(pfapl_id);
H5Pclose(fcpl_id);
H5Pclose(pfcpl_id);
#ifdef DEBUG
if( file_id < 0 )
printf("Failed to create the splite file %s\n", name);
#endif
FUNC_RETURN_SET(file_id);
done:
FUNC_LEAVE_VOL
}
/*-------------------------------------------------------------------------
* Function: dset_split_create_attribute
*
* Purpose: Creates a attribute named 'split_file' to identify the
* file as split file
*
* Return: Success: 0
* Failure: -1
*
*-------------------------------------------------------------------------
*/
herr_t
dset_split_create_attribute(hid_t file_id)
{
int value = 1;
hid_t intType = H5Tcopy(H5T_NATIVE_INT32);
hid_t valueSpace= H5Screate(H5S_SCALAR);
hid_t attr= H5Acreate(file_id, ATTRIBUTE_NAME, intType, valueSpace,
H5P_DEFAULT, H5P_DEFAULT);
herr_t status= H5Awrite(attr, intType, &value);
H5Sclose(valueSpace);
H5Aclose(attr);
return status;
}
/*-------------------------------------------------------------------------
* Function: H5VL__dset_split_new_obj
*
* Purpose: Create a new dset_split object for an underlying object
*
* Return: Success: Pointer to the new dset_split object
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
static H5VL_dset_split_t *
H5VL_dset_split_new_dataset_obj(void *under_obj, hid_t under_vol_id, hid_t fid, H5I_type_t type)
{
H5VL_dset_split_t *new_obj;
new_obj = (H5VL_dset_split_t *)calloc(1, sizeof(H5VL_dset_split_t));
new_obj->under_object = under_obj;
new_obj->under_vol_id = under_vol_id;
new_obj->fid = fid;
new_obj->type = type;
new_obj->set = 1;
H5Iinc_ref(new_obj->under_vol_id);
return new_obj;
} /* end H5VL__dset_split_new_obj() */
/*-------------------------------------------------------------------------
* Function: H5VL__dset_split_new_obj
*
* Purpose: Create a new dset_split object for an underlying object
*
* Return: Success: Pointer to the new dset_split object
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
static H5VL_dset_split_t *
H5VL_dset_split_new_obj(void *under_obj, hid_t under_vol_id)
{
H5VL_dset_split_t *new_obj;
new_obj = (H5VL_dset_split_t *)calloc(1, sizeof(H5VL_dset_split_t));
new_obj->under_object = under_obj;
new_obj->under_vol_id = under_vol_id;
H5Iinc_ref(new_obj->under_vol_id);
return new_obj;
} /* end H5VL__dset_split_new_obj() */
/*-------------------------------------------------------------------------
* Function: H5VL__dset_split_free_obj
*
* Purpose: Release a dset_split object
*
* Note: Take care to preserve the current HDF5 error stack
* when calling HDF5 API calls.
*
* Return: Success: 0
* Failure: -1
*
*-------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_free_obj(H5VL_dset_split_t *obj)
{
hid_t err_id;
err_id = H5Eget_current_stack();
H5Idec_ref(obj->under_vol_id);
H5Eset_current_stack(err_id);
free(obj);
return 0;
} /* end H5VL__dset_split_free_obj() */
/*-------------------------------------------------------------------------
* Function: H5VL_dset_split_register
*
* Purpose: Register the dset_split VOL connector and retrieve an ID
* for it.
*
* Return: Success: The ID for the dset_split VOL connector
* Failure: -1
*
*-------------------------------------------------------------------------
*/
hid_t
H5VL_dset_split_register(void)
{
/* Singleton register the dset_split VOL connector ID */
if (H5VL_DSET_SPLIT_g < 0)
H5VL_DSET_SPLIT_g = H5VLregister_connector(&H5VL_dset_split_g, H5P_DEFAULT);
return H5VL_DSET_SPLIT_g;
} /* end H5VL_dset_split_register() */
/*-------------------------------------------------------------------------
* Function: H5VL_dset_split_init
*
* Purpose: Initialize this VOL connector, performing any necessary
* operations for the connector that will apply to all containers
* accessed with the connector.
*
* Return: Success: 0
* Failure: -1
*
*-------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_init(hid_t vipl_id)
{
#ifdef DEBUG
printf("DSET-SPLIT VOL INIT\n");
#endif
/* Shut compiler up about unused parameter */
(void)vipl_id;
return 0;
} /* end H5VL_dset_split_init() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_term
*
* Purpose: Terminate this VOL connector, performing any necessary
* operations for the connector that release connector-wide
* resources (usually created / initialized with the 'init'
* callback).
*
* Return: Success: 0
* Failure: (Can't fail)
*
*---------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_term(void)
{
#ifdef DEBUG
printf("DSET-SPLIT VOL TERM\n");
#endif
/* Reset VOL ID */
H5VL_DSET_SPLIT_g = H5I_INVALID_HID;
return 0;
} /* end H5VL_dset_split_term() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_info_copy
*
* Purpose: Duplicate the connector's info object.
*
* Returns: Success: New connector info object
* Failure: NULL
*
*---------------------------------------------------------------------------
*/
static void *
H5VL_dset_split_info_copy(const void *_info)
{
const H5VL_dset_split_info_t *info = (const H5VL_dset_split_info_t *)_info;
H5VL_dset_split_info_t * new_info;
#ifdef DEBUG
printf("DSET-SPLIT VOL INFO Copy\n");
#endif
/* Allocate new VOL info struct for the dset_split connector */
new_info = (H5VL_dset_split_info_t *)calloc(1, sizeof(H5VL_dset_split_info_t));
/* Increment reference count on underlying VOL ID, and copy the VOL info */
new_info->under_vol_id = info->under_vol_id;
H5Iinc_ref(new_info->under_vol_id);
if (info->under_vol_info)
H5VLcopy_connector_info(new_info->under_vol_id, &(new_info->under_vol_info), info->under_vol_info);
return new_info;
} /* end H5VL_dset_split_info_copy() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_info_cmp
*
* Purpose: Compare two of the connector's info objects, setting *cmp_value,
* following the same rules as strcmp().
*
* Return: Success: 0
* Failure: -1
*
*---------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_info_cmp(int *cmp_value, const void *_info1, const void *_info2)
{
const H5VL_dset_split_info_t *info1 = (const H5VL_dset_split_info_t *)_info1;
const H5VL_dset_split_info_t *info2 = (const H5VL_dset_split_info_t *)_info2;
#ifdef DEBUG
printf("DSET-SPLIT VOL INFO Compare\n");
#endif
/* Sanity checks */
assert(info1);
assert(info2);
/* Initialize comparison value */
*cmp_value = 0;
/* Compare under VOL connector classes */
H5VLcmp_connector_cls(cmp_value, info1->under_vol_id, info2->under_vol_id);
if (*cmp_value != 0)
return 0;
/* Compare under VOL connector info objects */
H5VLcmp_connector_info(cmp_value, info1->under_vol_id, info1->under_vol_info, info2->under_vol_info);
if (*cmp_value != 0)
return 0;
return 0;
} /* end H5VL_dset_split_info_cmp() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_info_free
*
* Purpose: Release an info object for the connector.
*
* Note: Take care to preserve the current HDF5 error stack
* when calling HDF5 API calls.
*
* Return: Success: 0
* Failure: -1
*
*---------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_info_free(void *_info)
{
H5VL_dset_split_info_t *info = (H5VL_dset_split_info_t *)_info;
hid_t err_id;
#ifdef DEBUG
printf("DSET-SPLIT VOL INFO Free\n");
#endif
err_id = H5Eget_current_stack();
/* Release underlying VOL ID and info */
if (info->under_vol_info)
H5VLfree_connector_info(info->under_vol_id, info->under_vol_info);
H5Idec_ref(info->under_vol_id);
H5Eset_current_stack(err_id);
/* Free dset_split info object itself */
free(info);
return 0;
} /* end H5VL_dset_split_info_free() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_info_to_str
*
* Purpose: Serialize an info object for this connector into a string
*
* Return: Success: 0
* Failure: -1
*
*---------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_info_to_str(const void *_info, char **str)
{
const H5VL_dset_split_info_t *info = (const H5VL_dset_split_info_t *)_info;
H5VL_class_value_t under_value = (H5VL_class_value_t)-1;
char * under_vol_string = NULL;
size_t under_vol_str_len = 0;
#ifdef DEBUG
printf("DSET-SPLIT VOL INFO To String\n");
#endif
/* Get value and string for underlying VOL connector */
H5VLget_value(info->under_vol_id, &under_value);
H5VLconnector_info_to_str(info->under_vol_info, info->under_vol_id, &under_vol_string);
/* Determine length of underlying VOL info string */
if (under_vol_string)
under_vol_str_len = strlen(under_vol_string);
/* Allocate space for our info */
*str = (char *)H5allocate_memory(32 + under_vol_str_len, (hbool_t)0);
assert(*str);
/* Encode our info
* Normally we'd use snprintf() here for a little extra safety, but that
* call had problems on Windows until recently. So, to be as platform-independent
* as we can, we're using sprintf() instead.
*/
sprintf(*str, "under_vol=%u;under_info={%s}", (unsigned)under_value,
(under_vol_string ? under_vol_string : ""));
return 0;
} /* end H5VL_dset_split_info_to_str() */
/*---------------------------------------------------------------------------
* Function: H5VL_dset_split_str_to_info
*
* Purpose: Deserialize a string into an info object for this connector.
*
* Return: Success: 0
* Failure: -1
*
*---------------------------------------------------------------------------
*/
static herr_t
H5VL_dset_split_str_to_info(const char *str, void **_info)
{
H5VL_dset_split_info_t *info;
unsigned under_vol_value;
const char * under_vol_info_start, *under_vol_info_end;
hid_t under_vol_id;
void * under_vol_info = NULL;
#ifdef DEBUG
printf("DSET-SPLIT VOL INFO String To Info\n");
#endif
/* Retrieve the underlying VOL connector value and info */
sscanf(str, "under_vol=%u;", &under_vol_value);
under_vol_id = H5VLregister_connector_by_value((H5VL_class_value_t)under_vol_value, H5P_DEFAULT);
under_vol_info_start = strchr(str, '{');
under_vol_info_end = strrchr(str, '}');
assert(under_vol_info_end > under_vol_info_start);
if (under_vol_info_end != (under_vol_info_start + 1)) {
char *under_vol_info_str;
under_vol_info_str = (char *)malloc((size_t)(under_vol_info_end - under_vol_info_start));
memcpy(under_vol_info_str, under_vol_info_start + 1,
(size_t)((under_vol_info_end - under_vol_info_start) - 1));
*(under_vol_info_str + (under_vol_info_end - under_vol_info_start)) = '\0';
H5VLconnector_str_to_info(under_vol_info_str, under_vol_id, &under_vol_info);
free(under_vol_info_str);
} /* end else */
/* Allocate new dset_split VOL connector info and set its fields */
info = (H5VL_dset_split_info_t *)calloc(1, sizeof(H5VL_dset_split_info_t));
info->under_vol_id = under_vol_id;
info->under_vol_info = under_vol_info;
/* Set return value */
*_info = info;
return 0;
} /* end H5VL_dset_split_str_to_info() */