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-rw-r--r--src/H5FDsplitter.c1346
1 files changed, 1346 insertions, 0 deletions
diff --git a/src/H5FDsplitter.c b/src/H5FDsplitter.c
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+++ b/src/H5FDsplitter.c
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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://support.hdfgroup.org/ftp/HDF5/releases. *
+ * If you do not have access to either file, you may request a copy from *
+ * help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose: The Splitter VFD implements a file driver which relays all the
+ * VFD calls to an underlying VFD, and send all the write calls to
+ * another underlying VFD. Maintains two files simultaneously.
+ */
+
+/* This source code file is part of the H5FD driver module */
+#include "H5FDdrvr_module.h"
+
+#include "H5private.h" /* Generic Functions */
+#include "H5Eprivate.h" /* Error handling */
+#include "H5Fprivate.h" /* File access */
+#include "H5FDprivate.h" /* File drivers */
+#include "H5FDsplitter.h" /* Splitter file driver */
+#include "H5FLprivate.h" /* Free Lists */
+#include "H5Iprivate.h" /* IDs */
+#include "H5MMprivate.h" /* Memory management */
+#include "H5Pprivate.h" /* Property lists */
+
+/* The driver identification number, initialized at runtime */
+static hid_t H5FD_SPLITTER_g = 0;
+
+/* Driver-specific file access properties */
+typedef struct H5FD_splitter_fapl_t {
+ hid_t rw_fapl_id; /* fapl for the R/W channel */
+ hid_t wo_fapl_id; /* fapl for the W/O channel */
+ char wo_path[H5FD_SPLITTER_PATH_MAX + 1]; /* file name for the W/O channel */
+ char log_file_path[H5FD_SPLITTER_PATH_MAX + 1]; /* file to record errors reported by the W/O channel */
+ hbool_t ignore_wo_errs; /* TRUE to ignore errors on the W/O channel */
+} H5FD_splitter_fapl_t;
+
+/* The information of this splitter */
+typedef struct H5FD_splitter_t {
+ H5FD_t pub; /* public stuff, must be first */
+ unsigned version; /* version of the H5FD_splitter_vfd_config_t structure used */
+ H5FD_splitter_fapl_t fa; /* driver-specific file access properties */
+ H5FD_t *rw_file; /* pointer of R/W channel */
+ H5FD_t *wo_file; /* pointer of W/O channel */
+ FILE *logfp; /* Log file pointer */
+} H5FD_splitter_t;
+
+/*
+ * These macros check for overflow of various quantities. These macros
+ * assume that HDoff_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(HDoff_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) || \
+ HADDR_UNDEF==(A)+(Z) || \
+ (HDoff_t)((A)+(Z))<(HDoff_t)(A))
+
+/* This macro provides a wrapper for shared fail-log-ignore behavior
+ * for errors arising in the splitter's W/O channel.
+ * Logs an error entry in a log file, if the file exists.
+ * If not set to ignore errors, registers an error with the library.
+ */
+#define H5FD_SPLITTER_WO_ERROR(file, funcname, errmajor, errminor, ret, mesg) \
+{ \
+ H5FD__splitter_log_error((file), (funcname), (mesg)); \
+ if(FALSE == (file)->fa.ignore_wo_errs) \
+ HGOTO_ERROR((errmajor), (errminor), (ret), (mesg)) \
+}
+
+#define H5FD_SPLITTER_DEBUG_OP_CALLS 0 /* debugging print toggle; 0 disables */
+
+#if H5FD_SPLITTER_DEBUG_OP_CALLS
+#define H5FD_SPLITTER_LOG_CALL(name) do { \
+ HDprintf("called %s()\n", (name)); \
+ HDfflush(stdout); \
+} while (0)
+#else
+#define H5FD_SPLITTER_LOG_CALL(name) /* no-op */
+#endif /* H5FD_SPLITTER_DEBUG_OP_CALLS */
+
+/* Private functions */
+
+/* Print error messages from W/O channel to log file */
+static herr_t H5FD__splitter_log_error(const H5FD_splitter_t *file, const char *atfunc, const char *msg);
+static int H5FD__copy_plist(hid_t fapl_id, hid_t *id_out_ptr);
+
+/* Prototypes */
+static herr_t H5FD__splitter_term(void);
+static hsize_t H5FD__splitter_sb_size(H5FD_t *_file);
+static herr_t H5FD__splitter_sb_encode(H5FD_t *_file, char *name/*out*/, unsigned char *buf/*out*/);
+static herr_t H5FD__splitter_sb_decode(H5FD_t *_file, const char *name, const unsigned char *buf);
+static void *H5FD__splitter_fapl_get(H5FD_t *_file);
+static void *H5FD__splitter_fapl_copy(const void *_old_fa);
+static herr_t H5FD__splitter_fapl_free(void *_fapl);
+static H5FD_t *H5FD__splitter_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr);
+static herr_t H5FD__splitter_close(H5FD_t *_file);
+static int H5FD__splitter_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
+static herr_t H5FD__splitter_query(const H5FD_t *_file, unsigned long *flags /* out */);
+static herr_t H5FD__splitter_get_type_map(const H5FD_t *_file, H5FD_mem_t *type_map);
+static haddr_t H5FD__splitter_alloc(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
+static herr_t H5FD__splitter_free(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size);
+static haddr_t H5FD__splitter_get_eoa(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type);
+static herr_t H5FD__splitter_set_eoa(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr);
+static haddr_t H5FD__splitter_get_eof(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type);
+static herr_t H5FD__splitter_get_handle(H5FD_t *_file, hid_t H5_ATTR_UNUSED fapl, void** file_handle);
+static herr_t H5FD__splitter_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size, void *buf);
+static herr_t H5FD__splitter_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size, const void *buf);
+static herr_t H5FD__splitter_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
+static herr_t H5FD__splitter_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
+static herr_t H5FD__splitter_lock(H5FD_t *_file, hbool_t rw);
+static herr_t H5FD__splitter_unlock(H5FD_t *_file);
+
+static const H5FD_class_t H5FD_splitter_g = {
+ "splitter", /* name */
+ MAXADDR, /* maxaddr */
+ H5F_CLOSE_WEAK, /* fc_degree */
+ H5FD__splitter_term, /* terminate */
+ H5FD__splitter_sb_size, /* sb_size */
+ H5FD__splitter_sb_encode, /* sb_encode */
+ H5FD__splitter_sb_decode, /* sb_decode */
+ sizeof(H5FD_splitter_fapl_t), /* fapl_size */
+ H5FD__splitter_fapl_get, /* fapl_get */
+ H5FD__splitter_fapl_copy, /* fapl_copy */
+ H5FD__splitter_fapl_free, /* fapl_free */
+ 0, /* dxpl_size */
+ NULL, /* dxpl_copy */
+ NULL, /* dxpl_free */
+ H5FD__splitter_open, /* open */
+ H5FD__splitter_close, /* close */
+ H5FD__splitter_cmp, /* cmp */
+ H5FD__splitter_query, /* query */
+ H5FD__splitter_get_type_map, /* get_type_map */
+ H5FD__splitter_alloc, /* alloc */
+ H5FD__splitter_free, /* free */
+ H5FD__splitter_get_eoa, /* get_eoa */
+ H5FD__splitter_set_eoa, /* set_eoa */
+ H5FD__splitter_get_eof, /* get_eof */
+ H5FD__splitter_get_handle, /* get_handle */
+ H5FD__splitter_read, /* read */
+ H5FD__splitter_write, /* write */
+ H5FD__splitter_flush, /* flush */
+ H5FD__splitter_truncate, /* truncate */
+ H5FD__splitter_lock, /* lock */
+ H5FD__splitter_unlock, /* unlock */
+ H5FD_FLMAP_DICHOTOMY /* fl_map */
+};
+
+/* Declare a free list to manage the H5FD_splitter_t struct */
+H5FL_DEFINE_STATIC(H5FD_splitter_t);
+
+/* Declare a free list to manage the H5FD_splitter_fapl_t struct */
+H5FL_DEFINE_STATIC(H5FD_splitter_fapl_t);
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__init_package
+ *
+ * Purpose: Initializes any interface-specific data or routines.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__init_package(void)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ if(H5FD_splitter_init() < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "unable to initialize splitter VFD")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5FD__init_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD_splitter_init
+ *
+ * Purpose: Initialize the splitter driver by registering it with the
+ * library.
+ *
+ * Return: Success: The driver ID for the splitter driver.
+ * Failure: Negative
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5FD_splitter_init(void)
+{
+ hid_t ret_value = H5I_INVALID_HID;
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ if(H5I_VFL != H5I_get_type(H5FD_SPLITTER_g))
+ H5FD_SPLITTER_g = H5FDregister(&H5FD_splitter_g);
+
+ ret_value = H5FD_SPLITTER_g;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_splitter_init() */
+
+
+/*---------------------------------------------------------------------------
+ * Function: H5FD__splitter_term
+ *
+ * Purpose: Shut down the splitter VFD.
+ *
+ * Returns: SUCCEED (Can't fail)
+ *---------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_term(void)
+{
+ FUNC_ENTER_STATIC_NOERR
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Reset VFL ID */
+ H5FD_SPLITTER_g = 0;
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5FD__splitter_term() */
+
+
+ /*-------------------------------------------------------------------------
+ * Function: H5FD__copy_plist
+ *
+ * Purpose: Sanity-wrapped H5P_copy_plist() for each channel.
+ * Utility function for operation in multiple locations.
+ *
+ * Return: 0 on success, -1 on error.
+ *-------------------------------------------------------------------------
+ */
+static int
+H5FD__copy_plist(hid_t fapl_id,
+ hid_t *id_out_ptr)
+{
+ int ret_value = 0;
+ H5P_genplist_t *plist_ptr = NULL;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(id_out_ptr != NULL);
+
+ if(FALSE == H5P_isa_class(fapl_id, H5P_FILE_ACCESS))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, -1, "not a file access property list");
+
+ plist_ptr = (H5P_genplist_t *)H5I_object(fapl_id);
+ if(NULL == plist_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, -1, "unable to get property list");
+
+ *id_out_ptr = H5P_copy_plist(plist_ptr, FALSE);
+ if(H5I_INVALID_HID == *id_out_ptr)
+ HGOTO_ERROR(H5E_VFL, H5E_BADTYPE, -1, "unable to copy file access property list");
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5FD__copy_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5Pset_fapl_splitter
+ *
+ * Purpose: Sets the file access property list to use the
+ * splitter driver.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Pset_fapl_splitter(hid_t fapl_id, H5FD_splitter_vfd_config_t *vfd_config)
+{
+ H5FD_splitter_fapl_t *info = NULL;
+ H5P_genplist_t *plist_ptr = NULL;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_API(FAIL)
+ H5TRACE2("e", "i*Dr", fapl_id, vfd_config);
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ if(H5FD_SPLITTER_MAGIC != vfd_config->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid configuration (magic number mismatch)")
+ if(H5FD_CURR_SPLITTER_VFD_CONFIG_VERSION != vfd_config->version)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid config (version number mismatch)")
+ if(NULL == (plist_ptr = (H5P_genplist_t *)H5I_object(fapl_id)))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a valid property list")
+
+ /* Make sure that the W/O channel supports write-only capability.
+ * Some drivers (e.g. family or multi) do revision of the superblock
+ * in-memory, causing problems in that channel.
+ * Uses the feature flag H5FD_FEAT_DEFAULT_VFD_COMPATIBLE as the
+ * determining attribute.
+ */
+ if(H5P_DEFAULT != vfd_config->wo_fapl_id) {
+ H5FD_class_t *wo_driver = NULL;
+ H5FD_driver_prop_t wo_driver_prop;
+ H5P_genplist_t *wo_plist_ptr = NULL;
+ unsigned long wo_driver_flags = 0;
+
+ wo_plist_ptr = (H5P_genplist_t *)H5I_object(vfd_config->wo_fapl_id);
+ if(NULL == wo_plist_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
+ if(H5P_peek(wo_plist_ptr, H5F_ACS_FILE_DRV_NAME, &wo_driver_prop) < 0)
+ HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get driver ID & info")
+ wo_driver = (H5FD_class_t *)H5I_object(wo_driver_prop.driver_id);
+ if(NULL == wo_driver)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "invalid driver ID in file access property list")
+ if(H5FD_driver_query(wo_driver, &wo_driver_flags) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "can't query VFD flags")
+ if(0 == (H5FD_FEAT_DEFAULT_VFD_COMPATIBLE & wo_driver_flags))
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "unsuitable W/O driver")
+ } /* end if W/O VFD is non-default */
+
+ info = H5FL_CALLOC(H5FD_splitter_fapl_t);
+ if(NULL == info)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTALLOC, FAIL, "unable to allocate file access property list struct")
+
+ info->ignore_wo_errs = vfd_config->ignore_wo_errs;
+ HDstrncpy(info->wo_path, vfd_config->wo_path, H5FD_SPLITTER_PATH_MAX);
+ HDstrncpy(info->log_file_path, vfd_config->log_file_path, H5FD_SPLITTER_PATH_MAX);
+ info->rw_fapl_id = H5P_FILE_ACCESS_DEFAULT; /* pre-set value */
+ info->wo_fapl_id = H5P_FILE_ACCESS_DEFAULT; /* pre-set value */
+
+ /* Set non-default channel FAPL IDs in splitter configuration info */
+ if(H5P_DEFAULT != vfd_config->rw_fapl_id) {
+ if(FALSE == H5P_isa_class(vfd_config->rw_fapl_id, H5P_FILE_ACCESS))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")
+ info->rw_fapl_id = vfd_config->rw_fapl_id;
+ }
+ if(H5P_DEFAULT != vfd_config->wo_fapl_id) {
+ if(FALSE == H5P_isa_class(vfd_config->wo_fapl_id, H5P_FILE_ACCESS))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")
+ info->wo_fapl_id = vfd_config->wo_fapl_id;
+ }
+
+ ret_value = H5P_set_driver(plist_ptr, H5FD_SPLITTER, info);
+
+done:
+ if(info)
+ info = H5FL_FREE(H5FD_splitter_fapl_t, info);
+
+ FUNC_LEAVE_API(ret_value)
+} /* end H5Pset_fapl_splitter() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5Pget_fapl_splitter
+ *
+ * Purpose: Returns information about the splitter file access property
+ * list through the structure config_out.
+ *
+ * Will fail if config_out is received without pre-set valid
+ * magic and version information.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Pget_fapl_splitter(hid_t fapl_id, H5FD_splitter_vfd_config_t *config_out)
+{
+ const H5FD_splitter_fapl_t *fapl_ptr = NULL;
+ H5P_genplist_t *plist_ptr = NULL;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_API(FAIL)
+ H5TRACE2("e", "i*Dr", fapl_id, config_out);
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
+ if(config_out == NULL)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "config_out pointer is null")
+ if(H5FD_SPLITTER_MAGIC != config_out->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "info-out pointer invalid (magic number mismatch)")
+ if(H5FD_CURR_SPLITTER_VFD_CONFIG_VERSION != config_out->version)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "info-out pointer invalid (version unsafe)")
+
+ /* Pre-set out FAPL IDs with intent to replace these values */
+ config_out->rw_fapl_id = H5I_INVALID_HID;
+ config_out->wo_fapl_id = H5I_INVALID_HID;
+
+ /* Check and get the splitter fapl */
+ if(NULL == (plist_ptr = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
+ if(H5FD_SPLITTER != H5P_peek_driver(plist_ptr))
+ HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver")
+ if(NULL == (fapl_ptr = (const H5FD_splitter_fapl_t *)H5P_peek_driver_info(plist_ptr)))
+ HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "unable to get specific-driver info")
+
+ HDstrncpy(config_out->wo_path, fapl_ptr->wo_path, H5FD_SPLITTER_PATH_MAX);
+ HDstrncpy(config_out->log_file_path, fapl_ptr->log_file_path, H5FD_SPLITTER_PATH_MAX);
+ config_out->ignore_wo_errs = fapl_ptr->ignore_wo_errs;
+
+ /* Copy R/W and W/O FAPLs */
+ if(H5FD__copy_plist(fapl_ptr->rw_fapl_id, &(config_out->rw_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "can't copy R/W FAPL");
+ if(H5FD__copy_plist(fapl_ptr->wo_fapl_id, &(config_out->wo_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "can't copy W/O FAPL");
+
+done:
+ FUNC_LEAVE_API(ret_value)
+} /* end H5Pget_fapl_splitter() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_flush
+ *
+ * Purpose: Flushes all data to disk for both channels.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_flush(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Public API for dxpl "context" */
+ if(H5FDflush(file->rw_file, dxpl_id, closing) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTFLUSH, FAIL, "unable to flush R/W file")
+ if(H5FDflush(file->wo_file, dxpl_id, closing) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTFLUSH, FAIL, "unable to flush W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_read
+ *
+ * Purpose: Reads SIZE bytes of data from the R/W channel, beginning at
+ * address ADDR into buffer BUF according to data transfer
+ * properties in DXPL_ID.
+ *
+ * Return: Success: SUCCEED
+ * The read result is written into the BUF buffer
+ * which should be allocated by the caller.
+ * Failure: FAIL
+ * The contents of BUF are undefined.
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type,
+ hid_t H5_ATTR_UNUSED dxpl_id, haddr_t addr, size_t size, void *buf)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(file && file->pub.cls);
+ HDassert(buf);
+
+ /* Check for overflow conditions */
+ if(!H5F_addr_defined(addr))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined, addr = %llu", (unsigned long long)addr)
+ if(REGION_OVERFLOW(addr, size))
+ HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu", (unsigned long long)addr)
+
+ /* Only read from R/W channel */
+ /* Public API for dxpl "context" */
+ if(H5FDread(file->rw_file, type, dxpl_id, addr, size, buf) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "Reading from R/W channel failed")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_write
+ *
+ * Purpose: Writes SIZE bytes of data to R/W and W/O channels, beginning
+ * at address ADDR from buffer BUF according to data transfer
+ * properties in DXPL_ID.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id,
+ haddr_t addr, size_t size, const void *buf)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ H5P_genplist_t *plist_ptr = NULL;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ if(NULL == (plist_ptr = (H5P_genplist_t *)H5I_object(dxpl_id)))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
+
+ /* Write to each file */
+ /* Public API for dxpl "context" */
+ if(H5FDwrite(file->rw_file, type, dxpl_id, addr, size, buf) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "R/W file write failed")
+ if(H5FDwrite(file->wo_file, type, dxpl_id, addr, size, buf) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_WRITEERROR, FAIL, "unable to write W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_write() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_fapl_get
+ *
+ * Purpose: Returns a file access property list which indicates how the
+ * specified file is being accessed. The return list could be
+ * used to access another file the same way.
+ *
+ * Return: Success: Ptr to new file access property list with all
+ * members copied from the file struct.
+ * Failure: NULL
+ *-------------------------------------------------------------------------
+ */
+static void *
+H5FD__splitter_fapl_get(H5FD_t *_file)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ void *ret_value = NULL;
+
+ FUNC_ENTER_STATIC_NOERR
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ ret_value = H5FD__splitter_fapl_copy(&(file->fa));
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_fapl_get() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_fapl_copy
+ *
+ * Purpose: Copies the file access properties.
+ *
+ * Return: Success: Pointer to a new property list info structure.
+ * Failure: NULL
+ *-------------------------------------------------------------------------
+ */
+static void *
+H5FD__splitter_fapl_copy(const void *_old_fa)
+{
+ const H5FD_splitter_fapl_t *old_fa_ptr = (const H5FD_splitter_fapl_t *)_old_fa;
+ H5FD_splitter_fapl_t *new_fa_ptr = NULL;
+ void *ret_value = NULL;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(old_fa_ptr);
+
+ new_fa_ptr = H5FL_CALLOC(H5FD_splitter_fapl_t);
+ if(NULL == new_fa_ptr)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTALLOC, NULL, "unable to allocate log file FAPL")
+
+ HDmemcpy(new_fa_ptr, old_fa_ptr, sizeof(H5FD_splitter_fapl_t));
+ HDstrncpy(new_fa_ptr->wo_path, old_fa_ptr->wo_path, H5FD_SPLITTER_PATH_MAX);
+ HDstrncpy(new_fa_ptr->log_file_path, old_fa_ptr->log_file_path, H5FD_SPLITTER_PATH_MAX);
+
+ /* Copy R/W and W/O FAPLs */
+ if(H5FD__copy_plist(old_fa_ptr->rw_fapl_id, &(new_fa_ptr->rw_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "can't copy R/W FAPL");
+ if(H5FD__copy_plist(old_fa_ptr->wo_fapl_id, &(new_fa_ptr->wo_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "can't copy W/O FAPL");
+
+ ret_value = (void *)new_fa_ptr;
+
+done:
+ if(NULL == ret_value)
+ if(new_fa_ptr)
+ new_fa_ptr = H5FL_FREE(H5FD_splitter_fapl_t, new_fa_ptr);
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_fapl_copy() */
+
+
+/*--------------------------------------------------------------------------
+ * Function: H5FD__splitter_fapl_free
+ *
+ * Purpose: Releases the file access lists
+ *
+ * Return: SUCCEED/FAIL
+ *--------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_fapl_free(void *_fapl)
+{
+ H5FD_splitter_fapl_t *fapl = (H5FD_splitter_fapl_t*)_fapl;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(fapl);
+
+ if(H5I_dec_ref(fapl->rw_fapl_id) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTDEC, FAIL, "can't close R/W FAPL ID")
+ if(H5I_dec_ref(fapl->wo_fapl_id) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTDEC, FAIL, "can't close W/O FAPL ID")
+
+ /* Free the property list */
+ fapl = H5FL_FREE(H5FD_splitter_fapl_t, fapl);
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_fapl_free() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_open
+ *
+ * Purpose: Create and/or opens a file as an HDF5 file.
+ *
+ * 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
+ *-------------------------------------------------------------------------
+ */
+static H5FD_t *
+H5FD__splitter_open(const char *name, unsigned flags, hid_t splitter_fapl_id, haddr_t maxaddr)
+{
+ H5FD_splitter_t *file_ptr = NULL; /* Splitter VFD info */
+ const H5FD_splitter_fapl_t *fapl_ptr = NULL; /* Driver-specific property list */
+ H5P_genplist_t *plist_ptr = NULL;
+ H5FD_t *ret_value = NULL;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ if(!name || !*name)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name")
+ if(0 == maxaddr || HADDR_UNDEF == maxaddr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr")
+ if(ADDR_OVERFLOW(maxaddr))
+ HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, NULL, "bogus maxaddr")
+ if((H5P_FILE_ACCESS_DEFAULT == splitter_fapl_id) ||
+ (H5FD_SPLITTER != H5Pget_driver(splitter_fapl_id)) )
+ /* presupposes that H5P_FILE_ACCESS_DEFAULT is not a splitter */
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "driver is not splitter")
+
+ file_ptr = (H5FD_splitter_t *)H5FL_CALLOC(H5FD_splitter_t);
+ if(NULL == file_ptr)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTALLOC, NULL, "unable to allocate file struct")
+ file_ptr->fa.rw_fapl_id = H5I_INVALID_HID;
+ file_ptr->fa.wo_fapl_id = H5I_INVALID_HID;
+
+ /* Get the driver-specific file access properties */
+ plist_ptr = (H5P_genplist_t *)H5I_object(splitter_fapl_id);
+ if(NULL == plist_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
+ fapl_ptr = (const H5FD_splitter_fapl_t *)H5P_peek_driver_info(plist_ptr);
+ if(NULL == fapl_ptr)
+ HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "unable to get VFL driver info")
+
+ /* Copy simpler info */
+ HDstrncpy(file_ptr->fa.wo_path, fapl_ptr->wo_path, H5FD_SPLITTER_PATH_MAX);
+ HDstrncpy(file_ptr->fa.log_file_path, fapl_ptr->log_file_path, H5FD_SPLITTER_PATH_MAX);
+ file_ptr->fa.ignore_wo_errs = fapl_ptr->ignore_wo_errs;
+
+ /* Copy R/W and W/O channel FAPLs. */
+ if(H5FD__copy_plist(fapl_ptr->rw_fapl_id, &(file_ptr->fa.rw_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "can't copy R/W FAPL");
+ if(H5FD__copy_plist(fapl_ptr->wo_fapl_id, &(file_ptr->fa.wo_fapl_id)) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "can't copy W/O FAPL");
+
+ /* Prepare log file if necessary.
+ * If application wants to ignore the errors from W/O channel and
+ * provided a name for the log file, then open it
+ */
+ if(!file_ptr->logfp) {
+ if(file_ptr->fa.log_file_path[0] != '\0') {
+ file_ptr->logfp = HDfopen(file_ptr->fa.log_file_path, "w");
+ if(file_ptr->logfp == NULL)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTOPENFILE, NULL, "unable to open log file")
+ } /* end if logfile path given */
+ } /* end if logfile pointer/handle does not exist */
+
+ file_ptr->rw_file = H5FD_open(name, flags, fapl_ptr->rw_fapl_id, HADDR_UNDEF);
+ if(!file_ptr->rw_file)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTOPENFILE, NULL, "unable to open R/W file")
+
+ file_ptr->wo_file = H5FD_open(fapl_ptr->wo_path, flags, fapl_ptr->wo_fapl_id, HADDR_UNDEF);
+ if(!file_ptr->wo_file)
+ H5FD_SPLITTER_WO_ERROR(file_ptr, FUNC, H5E_VFL, H5E_CANTOPENFILE, NULL, "unable to open W/O file")
+
+ ret_value = (H5FD_t*)file_ptr;
+
+done:
+ if(NULL == ret_value) {
+ if(file_ptr) {
+ if(H5I_INVALID_HID != file_ptr->fa.rw_fapl_id)
+ H5I_dec_ref(file_ptr->fa.rw_fapl_id);
+ if(H5I_INVALID_HID != file_ptr->fa.wo_fapl_id)
+ H5I_dec_ref(file_ptr->fa.wo_fapl_id);
+ if(file_ptr->rw_file)
+ H5FD_close(file_ptr->rw_file);
+ if(file_ptr->wo_file)
+ H5FD_close(file_ptr->wo_file);
+ if(file_ptr->logfp)
+ HDfclose(file_ptr->logfp);
+ H5FL_FREE(H5FD_splitter_t, file_ptr);
+ }
+ } /* end if error */
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_close
+ *
+ * Purpose: Closes files on both read-write and write-only channels.
+ *
+ * Return: Success: SUCCEED
+ * Failure: FAIL, file not closed.
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_close(H5FD_t *_file)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+
+ if(H5I_dec_ref(file->fa.rw_fapl_id) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_ARGS, FAIL, "can't close R/W FAPL")
+ if(H5I_dec_ref(file->fa.wo_fapl_id) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_ARGS, FAIL, "can't close W/O FAPL")
+
+ if(file->rw_file)
+ if(H5FD_close(file->rw_file) == FAIL)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTCLOSEFILE, FAIL, "unable to close R/W file")
+ if(file->wo_file)
+ if(H5FD_close(file->wo_file) == FAIL)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTCLOSEFILE, FAIL, "unable to close W/O file")
+
+ if(file->logfp) {
+ HDfclose(file->logfp);
+ file->logfp = NULL;
+ }
+
+ /* Release the file info */
+ file = H5FL_FREE(H5FD_splitter_t, file);
+ file = NULL;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_get_eoa
+ *
+ * Purpose: Returns 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
+ *-------------------------------------------------------------------------
+ */
+static haddr_t
+H5FD__splitter_get_eoa(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type)
+{
+ const H5FD_splitter_t *file = (const H5FD_splitter_t *)_file;
+ haddr_t ret_value = HADDR_UNDEF;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if((ret_value = H5FD_get_eoa(file->rw_file, type)) == HADDR_UNDEF)
+ HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, HADDR_UNDEF, "unable to get eoa")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_get_eoa */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_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: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_set_eoa(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC)
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+ HDassert(file->wo_file);
+
+ if(H5FD_set_eoa(file->rw_file, type, addr) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTSET, FAIL, "H5FDset_eoa failed for R/W file")
+
+ if(H5FD_set_eoa(file->wo_file, type, addr) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTSET, FAIL, "unable to set EOA for W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_set_eoa() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_get_eof
+ *
+ * Purpose: Returns 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
+ *-------------------------------------------------------------------------
+ */
+static haddr_t
+H5FD__splitter_get_eof(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type)
+{
+ const H5FD_splitter_t *file = (const H5FD_splitter_t *)_file;
+ haddr_t ret_value = HADDR_UNDEF; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(HADDR_UNDEF == (ret_value = H5FD_get_eof(file->rw_file, type)))
+ HGOTO_ERROR(H5E_VFL, H5E_CANTGET, HADDR_UNDEF, "unable to get eof")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_get_eof */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_truncate
+ *
+ * Purpose: Notify driver to truncate the file back to the allocated size.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(file);
+ HDassert(file->rw_file);
+ HDassert(file->wo_file);
+
+ if(H5FDtruncate(file->rw_file, dxpl_id, closing) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTUPDATE, FAIL, "unable to truncate R/W file")
+
+ if(H5FDtruncate(file->wo_file, dxpl_id, closing) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTUPDATE, FAIL, "unable to truncate W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_truncate */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_sb_size
+ *
+ * Purpose: Obtains the number of bytes required to store the driver file
+ * access data in the HDF5 superblock.
+ *
+ * Return: Success: Number of bytes required.
+ *
+ * Failure: 0 if an error occurs or if the driver has no
+ * data to store in the superblock.
+ *
+ * NOTE: no public API for H5FD_sb_size, it needs to be added
+ *-------------------------------------------------------------------------
+ */
+static hsize_t
+H5FD__splitter_sb_size(H5FD_t *_file)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ hsize_t ret_value = 0;
+
+ FUNC_ENTER_STATIC_NOERR
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(file->rw_file)
+ ret_value = H5FD_sb_size(file->rw_file);
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_sb_size */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_sb_encode
+ *
+ * Purpose: Encode driver-specific data into the output arguments.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_sb_encode(H5FD_t *_file, char *name/*out*/, unsigned char *buf/*out*/)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(file->rw_file && H5FD_sb_encode(file->rw_file, name, buf) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTENCODE, FAIL, "unable to encode the superblock in R/W file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_sb_encode */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_sb_decode
+ *
+ * Purpose: Decodes the driver information block.
+ *
+ * Return: SUCCEED/FAIL
+ *
+ * NOTE: no public API for H5FD_sb_size, need to add
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_sb_decode(H5FD_t *_file, const char *name, const unsigned char *buf)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Sanity check */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(H5FD_sb_load(file->rw_file, name, buf) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTDECODE, FAIL, "unable to decode the superblock in R/W file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_sb_decode */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_cmp
+ *
+ * Purpose: Compare the keys of two files.
+ *
+ * Return: Success: A value like strcmp()
+ * Failure: Must never fail
+ *-------------------------------------------------------------------------
+ */
+static int
+H5FD__splitter_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
+{
+ const H5FD_splitter_t *f1 = (const H5FD_splitter_t *)_f1;
+ const H5FD_splitter_t *f2 = (const H5FD_splitter_t *)_f2;
+ herr_t ret_value = 0; /* Return value */
+
+ FUNC_ENTER_STATIC_NOERR
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(f1);
+ HDassert(f2);
+
+ ret_value = H5FD_cmp(f1->rw_file, f2->rw_file);
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_cmp */
+
+
+/*--------------------------------------------------------------------------
+ * Function: H5FD__splitter_get_handle
+ *
+ * Purpose: Returns a pointer to the file handle of low-level virtual
+ * file driver.
+ *
+ * Return: SUCCEED/FAIL
+ *--------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_get_handle(H5FD_t *_file, hid_t H5_ATTR_UNUSED fapl,
+ void **file_handle)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t*)_file;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(file->rw_file);
+ HDassert(file_handle);
+
+ /* Only do for R/W channel */
+ if(H5FD_get_vfd_handle(file->rw_file, file->fa.rw_fapl_id, file_handle) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "unable to get handle of R/W file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_get_handle */
+
+
+/*--------------------------------------------------------------------------
+ * Function: H5FD__splitter_lock
+ *
+ * Purpose: Sets a file lock.
+ *
+ * Return: SUCCEED/FAIL
+ *--------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_lock(H5FD_t *_file, hbool_t rw)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file; /* VFD file struct */
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ /* Place the lock on each file */
+ if(H5FD_lock(file->rw_file, rw) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTLOCKFILE, FAIL, "unable to lock R/W file")
+
+ if(file->wo_file != NULL)
+ if(H5FD_lock(file->wo_file, rw) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTLOCKFILE, FAIL, "unable to lock W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_lock */
+
+
+/*--------------------------------------------------------------------------
+ * Function: H5FD__splitter_unlock
+ *
+ * Purpose: Removes a file lock.
+ *
+ * Return: SUCCEED/FAIL
+ *--------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_unlock(H5FD_t *_file)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file; /* VFD file struct */
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ /* Remove the lock on each file */
+ if(H5FD_unlock(file->rw_file) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTUNLOCKFILE, FAIL, "unable to unlock R/W file")
+
+ if(file->wo_file != NULL)
+ if(H5FD_unlock(file->wo_file) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTUNLOCKFILE, FAIL, "unable to unlock W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_unlock */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_query
+ *
+ * Purpose: Set the flags that this VFL driver is capable of supporting.
+ * (listed in H5FDpublic.h)
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_query(const H5FD_t *_file, unsigned long *flags /* out */)
+{
+ const H5FD_splitter_t *file = (const H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ if(file) {
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(H5FDquery(file->rw_file, flags) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTLOCK, FAIL, "unable to query R/W file");
+ }
+ else {
+ /* There is no file. Because this is a pure passthrough VFD,
+ * it has no features of its own.
+ */
+ if(flags)
+ *flags = 0;
+ }
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_query() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_alloc
+ *
+ * Purpose: Allocate file memory.
+ *
+ * Return: Address of allocated space (HADDR_UNDEF if error).
+ *-------------------------------------------------------------------------
+ */
+static haddr_t
+H5FD__splitter_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file; /* VFD file struct */
+ haddr_t ret_value = HADDR_UNDEF; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ /* Allocate memory for each file, only return the return value for R/W file. */
+ if((ret_value = H5FDalloc(file->rw_file, type, dxpl_id, size)) == HADDR_UNDEF)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "unable to allocate for R/W file")
+
+ if(H5FDalloc(file->wo_file, type, dxpl_id, size) == HADDR_UNDEF)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "unable to alloc for W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_alloc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_get_type_map
+ *
+ * Purpose: Retrieve the memory type mapping for this file
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_get_type_map(const H5FD_t *_file, H5FD_mem_t *type_map)
+{
+ const H5FD_splitter_t *file = (const H5FD_splitter_t *)_file;
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ /* Retrieve memory type mapping for R/W channel only */
+ if(H5FD_get_fs_type_map(file->rw_file, type_map) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "unable to allocate for R/W file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_get_type_map() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_free
+ *
+ * Purpose: Free the resources for the splitter VFD.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_free(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size)
+{
+ H5FD_splitter_t *file = (H5FD_splitter_t *)_file; /* VFD file struct */
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_STATIC
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(file->rw_file);
+
+ if(H5FDfree(file->rw_file, type, dxpl_id, addr, size) < 0)
+ HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "unable to free for R/W file")
+
+ if(H5FDfree(file->wo_file, type, dxpl_id, addr, size) < 0)
+ H5FD_SPLITTER_WO_ERROR(file, FUNC, H5E_VFL, H5E_CANTINIT, FAIL, "unable to free for W/O file")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_free() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5FD__splitter_log_error
+ *
+ * Purpose: Log an error from the W/O channel appropriately.
+ *
+ * Return: SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD__splitter_log_error(const H5FD_splitter_t *file, const char *atfunc, const char *msg)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_STATIC_NOERR
+
+ H5FD_SPLITTER_LOG_CALL(FUNC);
+
+ /* Check arguments */
+ HDassert(file);
+ HDassert(atfunc && *atfunc);
+ HDassert(msg && *msg);
+
+ if(file->logfp != NULL) {
+ size_t size;
+ char *s;
+
+ size = HDstrlen(atfunc) + HDstrlen(msg) + 3; /* ':', ' ', '\n' */
+ s = (char *)HDmalloc(sizeof(char) * (size + 1));
+ if(NULL == s)
+ ret_value = FAIL;
+ else if(size < (size_t)HDsnprintf(s, size+1, "%s: %s\n", atfunc, msg))
+ ret_value = FAIL;
+ else if(size != HDfwrite(s, 1, size, file->logfp))
+ ret_value = FAIL;
+ HDfree(s);
+ }
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD__splitter_log_error() */
+