150 lines
4 KiB
C
150 lines
4 KiB
C
/*
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* Implementation of get_cpuid().
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*
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* Copyright IBM Corp. 2014, 2018
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* Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
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* Thomas Richter <tmricht@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "../../util/header.h"
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#include "../../util/util.h"
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#define SYSINFO_MANU "Manufacturer:"
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#define SYSINFO_TYPE "Type:"
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#define SYSINFO_MODEL "Model:"
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#define SRVLVL_CPUMF "CPU-MF:"
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#define SRVLVL_VERSION "version="
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#define SRVLVL_AUTHORIZATION "authorization="
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#define SYSINFO "/proc/sysinfo"
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#define SRVLVL "/proc/service_levels"
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int get_cpuid(char *buffer, size_t sz)
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{
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char *cp, *line = NULL, *line2;
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char type[8], model[33], version[8], manufacturer[32], authorization[8];
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int tpsize = 0, mdsize = 0, vssize = 0, mfsize = 0, atsize = 0;
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int read;
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unsigned long line_sz;
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size_t nbytes;
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FILE *sysinfo;
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/*
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* Scan /proc/sysinfo line by line and read out values for
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* Manufacturer:, Type: and Model:, for example:
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* Manufacturer: IBM
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* Type: 2964
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* Model: 702 N96
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* The first word is the Model Capacity and the second word is
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* Model (can be omitted). Both words have a maximum size of 16
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* bytes.
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*/
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memset(manufacturer, 0, sizeof(manufacturer));
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memset(type, 0, sizeof(type));
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memset(model, 0, sizeof(model));
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memset(version, 0, sizeof(version));
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memset(authorization, 0, sizeof(authorization));
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sysinfo = fopen(SYSINFO, "r");
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if (sysinfo == NULL)
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return errno;
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while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
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if (!strncmp(line, SYSINFO_MANU, strlen(SYSINFO_MANU))) {
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line2 = line + strlen(SYSINFO_MANU);
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while ((cp = strtok_r(line2, "\n ", &line2))) {
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mfsize += scnprintf(manufacturer + mfsize,
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sizeof(manufacturer) - mfsize, "%s", cp);
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}
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}
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if (!strncmp(line, SYSINFO_TYPE, strlen(SYSINFO_TYPE))) {
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line2 = line + strlen(SYSINFO_TYPE);
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while ((cp = strtok_r(line2, "\n ", &line2))) {
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tpsize += scnprintf(type + tpsize,
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sizeof(type) - tpsize, "%s", cp);
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}
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}
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if (!strncmp(line, SYSINFO_MODEL, strlen(SYSINFO_MODEL))) {
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line2 = line + strlen(SYSINFO_MODEL);
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while ((cp = strtok_r(line2, "\n ", &line2))) {
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mdsize += scnprintf(model + mdsize, sizeof(model) - mdsize,
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"%s%s", model[0] ? "," : "", cp);
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}
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break;
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}
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}
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fclose(sysinfo);
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/* Missing manufacturer, type or model information should not happen */
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if (!manufacturer[0] || !type[0] || !model[0])
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return EINVAL;
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/*
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* Scan /proc/service_levels and return the CPU-MF counter facility
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* version number and authorization level.
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* Optional, does not exist on z/VM guests.
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*/
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sysinfo = fopen(SRVLVL, "r");
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if (sysinfo == NULL)
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goto skip_sysinfo;
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while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
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if (strncmp(line, SRVLVL_CPUMF, strlen(SRVLVL_CPUMF)))
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continue;
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line2 = line + strlen(SRVLVL_CPUMF);
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while ((cp = strtok_r(line2, "\n ", &line2))) {
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if (!strncmp(cp, SRVLVL_VERSION,
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strlen(SRVLVL_VERSION))) {
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char *sep = strchr(cp, '=');
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vssize += scnprintf(version + vssize,
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sizeof(version) - vssize, "%s", sep + 1);
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}
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if (!strncmp(cp, SRVLVL_AUTHORIZATION,
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strlen(SRVLVL_AUTHORIZATION))) {
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char *sep = strchr(cp, '=');
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atsize += scnprintf(authorization + atsize,
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sizeof(authorization) - atsize, "%s", sep + 1);
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}
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}
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}
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fclose(sysinfo);
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skip_sysinfo:
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free(line);
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if (version[0] && authorization[0] )
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nbytes = snprintf(buffer, sz, "%s,%s,%s,%s,%s",
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manufacturer, type, model, version,
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authorization);
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else
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nbytes = snprintf(buffer, sz, "%s,%s,%s", manufacturer, type,
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model);
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return (nbytes >= sz) ? ENOBUFS : 0;
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}
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char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
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{
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char *buf = malloc(128);
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if (buf && get_cpuid(buf, 128))
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zfree(&buf);
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return buf;
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}
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