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nwipe/src/temperature.c
Gerold Gruber de887ea6ee get better timing information for temperature retrieval
2023-10-12 22:15:18 +02:00

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/*
* temperature.c: functions that populate the drive temperature variables
* in each drives context structure.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
//#define _LARGEFILE64_SOURCE
//#define _FILE_OFFSET_BITS 64
#define _BSD_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <dirent.h>
#include <sys/time.h>
#include "nwipe.h"
#include "context.h"
#include "method.h"
#include "device.h"
#include "prng.h"
#include "options.h"
#include "device.h"
#include "logging.h"
#include "temperature.h"
#include "miscellaneous.h"
int nwipe_init_temperature( nwipe_context_t* c )
{
/* See header definition for description of function
*/
DIR* dir;
DIR* dir2;
const char dirpath[] = "/sys/class/hwmon";
char dirpath_tmp[256];
char dirpath_tmp2[256];
char dirpath_hwmonX[256];
char device[256];
char device_context_name[256];
// const char dirpath[] = "/home/nick/mouse/hwmon1";
struct dirent* dp;
struct dirent* dp2;
/* Why Initialise with 1000000 (defined as NO_TEMPERATURE_DATA)?
* Because the GUI needs to know whether data has been obtained
* so it can display appropriate information when a
* device is unable to provide temperature data */
c->templ_has_hwmon_data = 0;
c->temp1_crit = NO_TEMPERATURE_DATA;
c->temp1_highest = NO_TEMPERATURE_DATA;
c->temp1_input = NO_TEMPERATURE_DATA;
c->temp1_lcrit = NO_TEMPERATURE_DATA;
c->temp1_lowest = NO_TEMPERATURE_DATA;
c->temp1_max = NO_TEMPERATURE_DATA;
c->temp1_min = NO_TEMPERATURE_DATA;
c->temp1_monitored_wipe_max = NO_TEMPERATURE_DATA;
c->temp1_monitored_wipe_min = NO_TEMPERATURE_DATA;
c->temp1_monitored_wipe_avg = NO_TEMPERATURE_DATA;
c->temp1_flash_rate = 0;
c->temp1_flash_rate_counter = 0;
c->temp1_path[0] = 0;
c->temp1_time = 0;
/* Each hwmonX directory is processed in turn and once a hwmonX directory has been
* found that is a block device and the block device name matches the drive
* name in the current context then the path to ../hwmonX is constructed and written
* to the drive context structure '* c'. This path is used in the nwipe_update_temperature
* function to retrieve temperature data and store it in the device context
*/
if( ( dir = opendir( dirpath ) ) != NULL )
{
/* Process each hwmonX sub directory in turn */
while( ( dp = readdir( dir ) ) != NULL )
{
/* Does the directory start with 'hwmon' */
if( strstr( dp->d_name, "hwmon" ) != NULL )
{
if( nwipe_options.verbose )
{
/* print a empty line to separate the different hwmon sensors */
nwipe_log( NWIPE_LOG_DEBUG, "hwmon:" );
}
strcpy( dirpath_tmp, dirpath );
strcat( dirpath_tmp, "/" );
strcat( dirpath_tmp, dp->d_name );
strcpy( dirpath_hwmonX, dirpath_tmp );
strcat( dirpath_tmp, "/device/block" );
/* Depending on the class of block device, the device name may
* appear in different sub-directories. So we try to open each
* directory that are known to contain block devices. These are
* /sys/class/hwmon/hwmonX/device/block
* /sys/class/hwmon/hwmonX/device/nvme/nvme0
* /sys/class/hwmon/hwmonX/device/
*/
if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, trying next path", dirpath_tmp );
}
strcpy( dirpath_tmp2, dirpath_hwmonX );
strcat( dirpath_tmp2, "/device/nvme/nvme0" );
strcpy( dirpath_tmp, dirpath_tmp2 );
if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, trying next path", dirpath_tmp );
}
strcpy( dirpath_tmp2, dirpath_hwmonX );
strcat( dirpath_tmp2, "/device" );
strcpy( dirpath_tmp, dirpath_tmp2 );
if( ( dir2 = opendir( dirpath_tmp ) ) == NULL )
{
if( nwipe_options.verbose )
{
nwipe_log(
NWIPE_LOG_DEBUG, "hwmon: %s doesn't exist, no more paths to try", dirpath_tmp );
}
continue;
}
}
}
if( dir2 != NULL )
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_DEBUG, "hwmon: Found %s", dirpath_tmp );
}
/* Read the device name */
while( ( dp2 = readdir( dir2 ) ) != NULL )
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_DEBUG, "hwmon: dirpath_tmp=%s/%s", dirpath_tmp, &dp2->d_name[0] );
}
/* Skip the '.' and '..' directories */
if( dp2->d_name[0] == '.' )
{
continue;
}
strcpy( device, dp2->d_name );
/* Create a copy of the device name from the context but strip the path from it, right justify
* device name, prefix with spaces so length is 8. */
nwipe_strip_path( device_context_name, c->device_name );
/* Remove leading/training whitespace from a string and left justify result */
trim( device_context_name );
/* Does the hwmon device match the device for this drive context */
if( strcmp( device, device_context_name ) != 0 )
{
/* No, so try next hwmon device */
continue;
}
else
{
/* Match ! This hwmon device matches this context, so write the hwmonX path to the context
*/
nwipe_log( NWIPE_LOG_NOTICE, "hwmon: %s has temperature monitoring", device, dirpath_tmp );
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_DEBUG, "hwmon: %s found in %s", device, dirpath_tmp );
}
/* Copy the hwmon path to the drive context structure */
strcpy( c->temp1_path, dirpath_hwmonX );
c->templ_has_hwmon_data = 1;
}
}
closedir( dir2 );
}
}
}
closedir( dir );
}
/* if no hwmon data available try scsi access (SAS Disks are known to be not working in hwmon */
if( c->templ_has_hwmon_data == 0 && ( c->device_type == NWIPE_DEVICE_SAS || c->device_type == NWIPE_DEVICE_SCSI ) )
{
nwipe_log( NWIPE_LOG_NOTICE, "no hwmon data for %s, try to get SCSI data", c->device_name );
if( nwipe_init_scsi_temperature( c ) == 0 )
{
c->templ_has_scsitemp_data = 1;
nwipe_log( NWIPE_LOG_INFO, "got SCSI temperature data for %s", c->device_name );
}
else
{
c->templ_has_scsitemp_data = 0;
nwipe_log( NWIPE_LOG_INFO, "got no SCSI temperature data for %s", c->device_name );
}
}
return 0;
}
float timedifference_msec( struct timeval tv_start, struct timeval tv_end )
{
/* helper function for time measurement in msec */
return ( tv_end.tv_sec - tv_start.tv_sec ) * 1000.0f + ( tv_end.tv_usec - tv_start.tv_usec ) / 1000.0f;
}
void nwipe_update_temperature( nwipe_context_t* c )
{
/* For the given drive context obtain the path to it's hwmon temperature settings
* and read then write the temperature values back to the context. A numeric ascii to integer conversion is
* performed. The temperaures should be updated no more frequently than every 60 seconds
*/
char temperature_label[NUMBER_OF_FILES][20] = {
"temp1_crit", "temp1_highest", "temp1_input", "temp1_lcrit", "temp1_lowest", "temp1_max", "temp1_min" };
int* temperature_pcontext[NUMBER_OF_FILES] = {
&( c->temp1_crit ),
&( c->temp1_highest ),
&( c->temp1_input ),
&( c->temp1_lcrit ),
&( c->temp1_lowest ),
&( c->temp1_max ),
&( c->temp1_min ) };
char path[256];
char temperature[256];
FILE* fptr;
int idx;
int result;
struct timeval tv_start;
struct timeval tv_end;
float delta_t;
/* avoid being called more often than 1x per 60 seconds */
time_t nwipe_time_now = time( NULL );
if( nwipe_time_now - c->temp1_time < 60 )
{
return;
}
/* measure time it takes to get the temperatures */
gettimeofday( &tv_start, 0 );
/* try to get temperatures from hwmon, standard */
if( c->templ_has_hwmon_data == 1 )
{
for( idx = 0; idx < NUMBER_OF_FILES; idx++ )
{
/* Construct the full path including filename */
strcpy( path, c->temp1_path );
strcat( path, "/" );
strcat( path, &( temperature_label[idx][0] ) );
/* Open the file */
if( ( fptr = fopen( path, "r" ) ) != NULL )
{
/* Acquire data until we reach a newline */
result = fscanf( fptr, "%[^\n]", temperature );
/* Convert numeric ascii to binary integer */
*( temperature_pcontext[idx] ) = atoi( temperature );
/* Divide by 1000 to get degrees celsius */
*( temperature_pcontext[idx] ) = *( temperature_pcontext[idx] ) / 1000;
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_NOTICE, "hwmon: %s %dC", path, *( temperature_pcontext[idx] ) );
}
fclose( fptr );
}
else
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_NOTICE, "hwmon: Unable to open %s", path );
}
}
}
}
else
{
/* alternative method to get temperature from SCSI/SAS disks */
if( c->device_type == NWIPE_DEVICE_SAS || c->device_type == NWIPE_DEVICE_SCSI )
{
if( c->templ_has_scsitemp_data == 1 )
{
if( nwipe_options.verbose )
{
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_crit %dC", c->device_name, c->temp1_crit );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_highest %dC", c->device_name, c->temp1_highest );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_input %dC", c->device_name, c->temp1_input );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_lcrit %dC", c->device_name, c->temp1_lcrit );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_lowest %dC", c->device_name, c->temp1_lowest );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_max %dC", c->device_name, c->temp1_max );
nwipe_log( NWIPE_LOG_NOTICE, "hddtemp: %s temp1_min %dC", c->device_name, c->temp1_min );
}
if( nwipe_get_scsi_temperature( c ) != 0 )
{
nwipe_log( NWIPE_LOG_ERROR, "get_scsi_temperature error" );
}
}
}
}
/* Update the time stamp that records when we checked the temperature,
* this is used by the GUI to check temperatures periodically, typically
* every 60 seconds */
c->temp1_time = time( NULL );
gettimeofday( &tv_end, 0 );
delta_t = timedifference_msec( tv_start, tv_end );
nwipe_log( NWIPE_LOG_NOTICE, "get temperature for %s took %f ms", c->device_name, delta_t );
return;
}
void nwipe_log_drives_temperature_limits( nwipe_context_t* c )
{
/* See header for description of function
*/
char temperature_limits_txt[500];
int idx = 0;
/*
* Initialise the character string, as we are building it a few
* characters at a time and it's important there it is populated
* with all zeros as we are using strlen() as we build the line up.
*/
memset( &temperature_limits_txt, 0, sizeof( temperature_limits_txt ) );
if( c->temp1_crit != NO_TEMPERATURE_DATA )
{
snprintf( temperature_limits_txt,
sizeof( temperature_limits_txt ),
"Temperature limits for %s, critical=%ic, ",
c->device_name,
c->temp1_crit );
}
else
{
snprintf( temperature_limits_txt,
sizeof( temperature_limits_txt ),
"Temperature limits for %s, critical=N/A, ",
c->device_name );
}
idx = strlen( temperature_limits_txt );
if( c->temp1_max != NO_TEMPERATURE_DATA )
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "max=%ic, ", c->temp1_max );
}
else
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "max=N/A, " );
}
idx = strlen( temperature_limits_txt );
if( c->temp1_highest != NO_TEMPERATURE_DATA )
{
snprintf( &temperature_limits_txt[idx],
( sizeof( temperature_limits_txt ) - idx ),
"highest=%ic, ",
c->temp1_highest );
}
else
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "highest=N/A, " );
}
idx = strlen( temperature_limits_txt );
if( c->temp1_lowest != NO_TEMPERATURE_DATA )
{
snprintf(
&temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "lowest=%ic, ", c->temp1_lowest );
}
else
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "lowest=N/A, " );
}
idx = strlen( temperature_limits_txt );
if( c->temp1_min != NO_TEMPERATURE_DATA )
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "min=%ic, ", c->temp1_min );
}
else
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "min=N/A, " );
}
idx = strlen( temperature_limits_txt );
if( c->temp1_lcrit != NO_TEMPERATURE_DATA )
{
snprintf( &temperature_limits_txt[idx],
( sizeof( temperature_limits_txt ) - idx ),
"low critical=%ic.",
c->temp1_lcrit );
}
else
{
snprintf( &temperature_limits_txt[idx], ( sizeof( temperature_limits_txt ) - idx ), "low critical=N/A. " );
}
nwipe_log( NWIPE_LOG_INFO, "%s", temperature_limits_txt );
return;
}
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