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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the 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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: H5Clog.c
+ * May 30 2016
+ * Quincey Koziol
+ *
+ * Purpose: Functions for generic cache logging in JSON format
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+#include "H5Cmodule.h" /* This source code file is part of the H5C module */
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h" /* Generic Functions */
+#ifdef H5_HAVE_PARALLEL
+#define H5AC_FRIEND /*suppress error about including H5ACpkg */
+#include "H5ACpkg.h" /* Metadata cache */
+#endif /* H5_HAVE_PARALLEL */
+#include "H5Cpkg.h" /* Metadata cache */
+#include "H5Eprivate.h" /* Error handling */
+#include "H5MMprivate.h" /* Memory management */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_set_up_logging
+ *
+ * Purpose: Setup for metadata cache logging.
+ *
+ * Metadata logging is enabled and disabled at two levels. This
+ * function and the associated tear_down function open and close
+ * the log file. the start_ and stop_logging functions are then
+ * used to switch logging on/off. Optionally, logging can begin
+ * as soon as the log file is opened (set via the start_immediately
+ * parameter to this function).
+ *
+ * The log functionality is split between the H5C and H5AC
+ * packages. Log state and direct log manipulation resides in
+ * H5C. Log messages are generated in H5AC and sent to
+ * the H5C_write_log_message function.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_set_up_logging(H5C_t *cache_ptr, const char log_location[],
+ hbool_t start_immediately)
+{
+#ifdef H5_HAVE_PARALLEL
+ H5AC_aux_t *aux_ptr = NULL;
+#endif /*H5_HAVE_PARALLEL*/
+ char *file_name = NULL;
+ size_t n_chars;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(cache_ptr->logging_enabled)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging already set up")
+ if(NULL == log_location)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL log location not allowed")
+
+ /* Possibly fix up the log file name.
+ * The extra 39 characters are for adding the rank to the file name
+ * under parallel HDF5. 39 characters allows > 2^127 processes which
+ * should be enough for anybody.
+ *
+ * allocation size = <path length> + dot + <rank # length> + \0
+ */
+ n_chars = HDstrlen(log_location) + 1 + 39 + 1;
+ if(NULL == (file_name = (char *)H5MM_calloc(n_chars * sizeof(char))))
+ HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't allocate memory for mdc log file name manipulation")
+
+#ifdef H5_HAVE_PARALLEL
+ /* Add the rank to the log file name when MPI is in use */
+ aux_ptr = (H5AC_aux_t *)(cache_ptr->aux_ptr);
+
+ if(NULL == aux_ptr)
+ HDsnprintf(file_name, n_chars, "%s", log_location);
+ else {
+ if(aux_ptr->magic != H5AC__H5AC_AUX_T_MAGIC)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "bad aux_ptr->magic")
+ HDsnprintf(file_name, n_chars, "%s.%d", log_location, aux_ptr->mpi_rank);
+ } /* end else */
+#else /* H5_HAVE_PARALLEL */
+ HDsnprintf(file_name, n_chars, "%s", log_location);
+#endif /* H5_HAVE_PARALLEL */
+
+ /* Open log file */
+ if(NULL == (cache_ptr->log_file_ptr = HDfopen(file_name, "w")))
+ HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "can't create mdc log file")
+
+ /* Set logging flags */
+ cache_ptr->logging_enabled = TRUE;
+ cache_ptr->currently_logging = start_immediately;
+
+ done:
+ if(file_name)
+ file_name = (char *)H5MM_xfree(file_name);
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_set_up_logging() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_tear_down_logging
+ *
+ * Purpose: Tear-down for metadata cache logging.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_tear_down_logging(H5C_t *cache_ptr)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(FALSE == cache_ptr->logging_enabled)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging not enabled")
+
+ /* Unset logging flags */
+ cache_ptr->logging_enabled = FALSE;
+ cache_ptr->currently_logging = FALSE;
+
+ /* Close log file */
+ if(EOF == HDfclose(cache_ptr->log_file_ptr))
+ HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problem closing mdc log file")
+ cache_ptr->log_file_ptr = NULL;
+
+ done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_tear_down_logging() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_start_logging
+ *
+ * Purpose: Start logging metadata cache operations.
+ *
+ * TODO: Add a function that dumps the current state of the
+ * metadata cache.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_start_logging(H5C_t *cache_ptr)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(FALSE == cache_ptr->logging_enabled)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging not enabled")
+ if(cache_ptr->currently_logging)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging already in progress")
+
+ /* Set logging flags */
+ cache_ptr->currently_logging = TRUE;
+
+ /* TODO - Dump cache state */
+
+ done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_start_logging() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_stop_logging
+ *
+ * Purpose: Stop logging metadata cache operations.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_stop_logging(H5C_t *cache_ptr)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(FALSE == cache_ptr->logging_enabled)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging not enabled")
+ if(FALSE == cache_ptr->currently_logging)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "logging not in progress")
+
+ /* Set logging flags */
+ cache_ptr->currently_logging = FALSE;
+
+ done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_stop_logging() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_get_logging_status
+ *
+ * Purpose: Determines if the cache is actively logging (via the OUT
+ * parameter).
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_get_logging_status(const H5C_t *cache_ptr, /*OUT*/ hbool_t *is_enabled,
+ /*OUT*/ hbool_t *is_currently_logging)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(NULL == is_enabled)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(NULL == is_currently_logging)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+
+ *is_enabled = cache_ptr->logging_enabled;
+ *is_currently_logging = cache_ptr->currently_logging;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_get_logging_status() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5C_write_log_message
+ *
+ * Purpose: Write a message to the log file and flush the file.
+ * The message string is neither modified nor freed.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Dana Robinson
+ * Sunday, March 16, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5C_write_log_message(const H5C_t *cache_ptr, const char message[])
+{
+ size_t n_chars;
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(FAIL)
+
+ /* Sanity checks */
+ if(NULL == cache_ptr)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache_ptr == NULL")
+ if(H5C__H5C_T_MAGIC != cache_ptr->magic)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "cache magic value incorrect")
+ if(FALSE == cache_ptr->currently_logging)
+ HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "not currently logging")
+ if(NULL == message)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL log message not allowed")
+
+ /* Write the log message and flush */
+ n_chars = HDstrlen(message);
+ if((int)n_chars != HDfprintf(cache_ptr->log_file_ptr, message))
+ HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error writing log message")
+ if(EOF == HDfflush(cache_ptr->log_file_ptr))
+ HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error flushing log message")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C_write_log_message() */
+
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