perf tools: Propagate get_cpuid() error

For consistency, propagate the exact cause for get_cpuid() to have
failed.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-9ig269f7ktnhh99g4l15vpu2@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 6bdfd9f1
// SPDX-License-Identifier: GPL-2.0
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
......@@ -30,7 +31,7 @@ get_cpuid(char *buffer, size_t sz)
buffer[nb-1] = '\0';
return 0;
}
return -1;
return ENOBUFS;
}
char *
......
......@@ -8,6 +8,7 @@
*/
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
......@@ -54,7 +55,7 @@ int get_cpuid(char *buffer, size_t sz)
sysinfo = fopen(SYSINFO, "r");
if (sysinfo == NULL)
return -1;
return errno;
while ((read = getline(&line, &line_sz, sysinfo)) != -1) {
if (!strncmp(line, SYSINFO_MANU, strlen(SYSINFO_MANU))) {
......@@ -89,7 +90,7 @@ int get_cpuid(char *buffer, size_t sz)
/* Missing manufacturer, type or model information should not happen */
if (!manufacturer[0] || !type[0] || !model[0])
return -1;
return EINVAL;
/*
* Scan /proc/service_levels and return the CPU-MF counter facility
......@@ -133,14 +134,14 @@ int get_cpuid(char *buffer, size_t sz)
else
nbytes = snprintf(buffer, sz, "%s,%s,%s", manufacturer, type,
model);
return (nbytes >= sz) ? -1 : 0;
return (nbytes >= sz) ? ENOBUFS : 0;
}
char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
{
char *buf = malloc(128);
if (buf && get_cpuid(buf, 128) < 0)
if (buf && get_cpuid(buf, 128))
zfree(&buf);
return buf;
}
// SPDX-License-Identifier: GPL-2.0
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
......@@ -58,7 +59,7 @@ __get_cpuid(char *buffer, size_t sz, const char *fmt)
buffer[nb-1] = '\0';
return 0;
}
return -1;
return ENOBUFS;
}
int
......
......@@ -705,14 +705,15 @@ static int process_sample_event(struct perf_tool *tool,
static int cpu_isa_config(struct perf_kvm_stat *kvm)
{
char buf[64], *cpuid;
char buf[128], *cpuid;
int err;
if (kvm->live) {
err = get_cpuid(buf, sizeof(buf));
if (err != 0) {
pr_err("Failed to look up CPU type\n");
return err;
pr_err("Failed to look up CPU type: %s\n",
str_error_r(err, buf, sizeof(buf)));
return -err;
}
cpuid = buf;
} else
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment