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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* This file is part of libnvme.
* Copyright (C) 2021 SUSE LLC
*
* Authors: Hannes Reinecke <hare@suse.de>
*
* This file implements basic logging functionality.
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <syslog.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#define LOG_FUNCNAME 1
#include "private.h"
#include "log.h"
#include "cleanup.h"
#ifndef LOG_CLOCK
#define LOG_CLOCK CLOCK_MONOTONIC
#endif
static struct nvme_log def_log = {
.fd = STDERR_FILENO,
.level = DEFAULT_LOGLEVEL,
.pid = false,
.timestamp = false,
};
void __attribute__((format(printf, 4, 5)))
__nvme_msg(nvme_root_t r, int level,
const char *func, const char *format, ...)
{
struct nvme_log *l;
va_list ap;
char pidbuf[16];
char timebuf[32];
static const char *const formats[] = {
"%s%s%s",
"%s%s%s: ",
"%s<%s>%s ",
"%s<%s> %s: ",
"[%s] %s%s ",
"[%s]%s %s: ",
"[%s] <%s>%s ",
"[%s] <%s> %s: ",
};
_cleanup_free_ char *header = NULL;
_cleanup_free_ char *message = NULL;
int idx = 0;
if (r)
l = &r->log;
else
l = &def_log;
if (level > l->level)
return;
if (l->timestamp) {
struct timespec now;
clock_gettime(LOG_CLOCK, &now);
snprintf(timebuf, sizeof(timebuf), "%6ld.%06ld",
(long)now.tv_sec, now.tv_nsec / 1000);
idx |= 1 << 2;
} else
*timebuf = '\0';
if (l->pid) {
snprintf(pidbuf, sizeof(pidbuf), "%ld", (long)getpid());
idx |= 1 << 1;
} else
*pidbuf = '\0';
if (func)
idx |= 1 << 0;
if (asprintf(&header, formats[idx],
timebuf, pidbuf, func ? func : "") == -1)
header = NULL;
va_start(ap, format);
if (vasprintf(&message, format, ap) == -1)
message = NULL;
va_end(ap);
dprintf(l->fd, "%s%s",
header ? header : "<error>",
message ? message : "<error>");
}
void nvme_init_logging(nvme_root_t r, int lvl, bool log_pid, bool log_tstamp)
{
r->log.level = lvl;
r->log.pid = log_pid;
r->log.timestamp = log_tstamp;
}
int nvme_get_logging_level(nvme_root_t r, bool *log_pid, bool *log_tstamp)
{
struct nvme_log *l;
if (r)
l = &r->log;
else
l = &def_log;
if (log_pid)
*log_pid = l->pid;
if (log_tstamp)
*log_tstamp = l->timestamp;
return l->level;
}
void nvme_init_default_logging(FILE *fp, int level, bool log_pid, bool log_tstamp)
{
def_log.fd = fileno(fp);
def_log.level = level;
def_log.pid = log_pid;
def_log.timestamp = log_tstamp;
}
void nvme_set_root(nvme_root_t r)
{
def_log.fd = r->log.fd;
def_log.level = r->log.level;
def_log.pid = r->log.pid;
def_log.timestamp = r->log.timestamp;
}
void nvme_set_debug(bool debug)
{
def_log.level = debug ? LOG_DEBUG : DEFAULT_LOGLEVEL;
}
bool nvme_get_debug(void)
{
return def_log.level == LOG_DEBUG;
}
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