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cpumf: Convert S390_CPUMSF_BUFFERSZ to util_path_sysfs()

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Use util_path_sysfs() to form a fully qualified sysfs file name
for file S390_CPUMSF_BUFFERSZ.
No functional change.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Thomas Richter
2025-04-07 14:39:13 +02:00
committed by Jan Höppner
parent 33fc534a81
commit 8c1ffd8989
3 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
cpumf/chcpumf.c
View File

@@ -16,11 +16,11 @@
#include <unistd.h>
#include <sys/stat.h>
#include "lib/util_opt.h"
#include "lib/util_prg.h"
#include "lib/util_base.h"
#include "lib/libcpumf.h"
#include "lib/util_base.h"
#include "lib/util_opt.h"
#include "lib/util_path.h"
#include "lib/util_prg.h"
static unsigned int verbose;
static unsigned long min_sdb, max_sdb;
@@ -88,21 +88,22 @@ static long parse_buffersize(char *string)
static int write_sfb(unsigned int min, unsigned int max)
{
int rc = EXIT_SUCCESS;
char text[64];
char text[64], *path;
size_t len;
FILE *fp;
fp = fopen(S390_CPUMSF_BUFFERSZ, "w");
path = util_path_sysfs(S390_CPUMSF_BUFFERSZ);
fp = fopen(path, "w");
if (!fp)
err(EXIT_FAILURE, S390_CPUMSF_BUFFERSZ);
err(EXIT_FAILURE, "%s", path);
snprintf(text, sizeof(text), "%u,%u", min, max);
len = strlen(text) + 1;
if (fwrite(text, 1, len, fp) != len) {
warn(S390_CPUMSF_BUFFERSZ);
warn("%s", path);
rc = EXIT_FAILURE;
}
if (fclose(fp)) {
warn(S390_CPUMSF_BUFFERSZ);
warn("%s", path);
rc = EXIT_FAILURE;
}
if (verbose && rc != EXIT_FAILURE)
@@ -110,6 +111,7 @@ static int write_sfb(unsigned int min, unsigned int max)
" Minimum:%7d sample-data-blocks\n"
" Maximum:%7d sample-data-blocks\n",
min, max);
free(path);
return rc;
}

2
include/lib/libcpumf.h
View File

@@ -14,7 +14,7 @@
#define S390_CPUMF_CFDIAG "/sys/devices/cpum_cf_diag/"
#define S390_CPUMF_SF "/sys/devices/cpum_sf/"
#define S390_CPUS_ONLINE "devices/system/cpu/online"
#define S390_CPUMSF_BUFFERSZ "/sys/module/kernel/parameters/cpum_sfb_size"
#define S390_CPUMSF_BUFFERSZ "module/kernel/parameters/cpum_sfb_size"
#define S390_SYSFS_PAI_CRYPTO "/sys/devices/pai_crypto/"
#define S390_SYSFS_PAI_EXT "/sys/devices/pai_ext/"
#define S390_SYSFS_PAI_NNPA S390_SYSFS_PAI_EXT "events/NNPA_ALL"

8
libcpumf/libcpumf_support.c
View File

@@ -13,6 +13,7 @@
#include <sys/stat.h>
#include "lib/libcpumf.h"
#include "lib/util_path.h"
#define SERVICELEVEL "/proc/service_levels"
@@ -129,14 +130,17 @@ bool libcpumf_have_sfb(void)
bool libcpumf_sfb_info(unsigned long *min, unsigned long *max)
{
int rc = false;
char *path;
FILE *fp;
fp = fopen(S390_CPUMSF_BUFFERSZ, "r");
path = util_path_sysfs(S390_CPUMSF_BUFFERSZ);
fp = fopen(path, "r");
if (!fp)
err(EXIT_FAILURE, "%s", S390_CPUMSF_BUFFERSZ);
err(EXIT_FAILURE, "%s", path);
if (fscanf(fp, "%lu,%lu", min, max) == 2)
rc = true;
fclose(fp);
free(path);
return rc;
}