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logsys.c
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logsys.c

/*
* Copyright (c) 2002-2004 MontaVista Software, Inc.
* Copyright (c) 2006-2010 Red Hat, Inc.
*
* Author: Steven Dake (sdake@redhat.com)
* Author: Lon Hohberger (lhh@redhat.com)
* Author: Fabio M. Di Nitto (fdinitto@redhat.com)
*
* All rights reserved.
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the MontaVista Software, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <stdint.h>
#include <ctype.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <qb/qbdefs.h>
#include <qb/qbutil.h>
#include <qb/qblog.h>
#include <corosync/list.h>
#include <corosync/engine/logsys.h>
/*
* syslog prioritynames, facility names to value mapping
* Some C libraries build this in to their headers, but it is non-portable
* so logsys supplies its own version.
*/
struct syslog_names {
const char *c_name;
int c_val;
};
static struct syslog_names prioritynames[] =
{
{ "alert", LOG_ALERT },
{ "crit", LOG_CRIT },
{ "debug", LOG_DEBUG },
{ "emerg", LOG_EMERG },
{ "err", LOG_ERR },
{ "error", LOG_ERR },
{ "info", LOG_INFO },
{ "notice", LOG_NOTICE },
{ "warning", LOG_WARNING },
{ NULL, -1 }
};
#define MAX_FILES_PER_SUBSYS 16
#ifdef HAVE_SMALL_MEMORY_FOOTPRINT
#define IPC_LOGSYS_SIZE 8192*64
#else
#define IPC_LOGSYS_SIZE 8192*1024
#endif
/*
* need unlogical order to preserve 64bit alignment
*/
struct logsys_logger {
char subsys[LOGSYS_MAX_SUBSYS_NAMELEN]; /* subsystem name */
char *logfile; /* log to file */
unsigned int mode; /* subsystem mode */
unsigned int debug; /* debug on|off */
int syslog_priority; /* priority */
int logfile_priority; /* priority to file */
int init_status; /* internal field to handle init queues
for subsystems */
int32_t target_id;
char *files[MAX_FILES_PER_SUBSYS];
int32_t file_idx;
int32_t dirty;
};
/* values for logsys_logger init_status */
#define LOGSYS_LOGGER_INIT_DONE 0
#define LOGSYS_LOGGER_NEEDS_INIT 1
static int logsys_system_needs_init = LOGSYS_LOGGER_NEEDS_INIT;
static struct logsys_logger logsys_loggers[LOGSYS_MAX_SUBSYS_COUNT + 1];
static pthread_mutex_t logsys_config_mutex = PTHREAD_MUTEX_INITIALIZER;
static int32_t _logsys_config_mode_set_unlocked(int32_t subsysid, uint32_t new_mode);
static void _logsys_config_apply_per_file(int32_t s, const char *filename);
static void _logsys_config_apply_per_subsys(int32_t s);
static char *format_buffer=NULL;
static int _logsys_config_subsys_get_unlocked (const char *subsys)
{
unsigned int i;
if (!subsys) {
return LOGSYS_MAX_SUBSYS_COUNT;
}
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
if (strcmp (logsys_loggers[i].subsys, subsys) == 0) {
return i;
}
}
return (-1);
}
/*
* we need a version that can work when somebody else is already
* holding a config mutex lock or we will never get out of here
*/
static int logsys_config_file_set_unlocked (
int subsysid,
const char **error_string,
const char *file)
{
static char error_string_response[512];
int i;
if (logsys_loggers[subsysid].target_id > 0) {
/* TODO close file
logsys_filter_apply(subsysid,
QB_LOG_FILTER_REMOVE,
logsys_loggers[subsysid].target_id);
*/
}
logsys_loggers[subsysid].dirty = QB_TRUE;
if (file == NULL) {
return (0);
}
if (strlen(file) >= PATH_MAX) {
snprintf (error_string_response,
sizeof(error_string_response),
"%s: logfile name exceed maximum system filename lenght\n",
logsys_loggers[subsysid].subsys);
*error_string = error_string_response;
return (-1);
}
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
if ((logsys_loggers[i].logfile != NULL) &&
(strcmp (logsys_loggers[i].logfile, file) == 0) &&
(i != subsysid)) {
/* we have found another subsys with this config file
* so add a filter
*/
logsys_loggers[subsysid].target_id = logsys_loggers[i].target_id;
return (0);
}
}
logsys_loggers[subsysid].logfile = strdup(file);
if (logsys_loggers[subsysid].logfile == NULL) {
snprintf (error_string_response,
sizeof(error_string_response),
"Unable to allocate memory for logfile '%s'\n",
file);
*error_string = error_string_response;
return (-1);
}
if (logsys_loggers[subsysid].target_id > 0) {
/* no one else is using this close it */
qb_log_file_close(logsys_loggers[subsysid].target_id);
}
logsys_loggers[subsysid].target_id = qb_log_file_open(file);
if (logsys_loggers[subsysid].target_id < 0) {
int err = logsys_loggers[subsysid].target_id;
char error_str[LOGSYS_MAX_PERROR_MSG_LEN];
const char *error_ptr;
error_ptr = qb_strerror_r(err, error_str, sizeof(error_str));
free(logsys_loggers[subsysid].logfile);
logsys_loggers[subsysid].logfile = NULL;
snprintf (error_string_response,
sizeof(error_string_response),
"Can't open logfile '%s' for reason: %s (%d).\n",
file, error_ptr, err);
*error_string = error_string_response;
return (-1);
}
qb_log_format_set(logsys_loggers[subsysid].target_id, format_buffer);
return (0);
}
static void logsys_subsys_init (
const char *subsys,
int subsysid)
{
if (logsys_system_needs_init == LOGSYS_LOGGER_NEEDS_INIT) {
logsys_loggers[subsysid].init_status =
LOGSYS_LOGGER_NEEDS_INIT;
} else {
logsys_loggers[subsysid].mode = logsys_loggers[LOGSYS_MAX_SUBSYS_COUNT].mode;
logsys_loggers[subsysid].debug = logsys_loggers[LOGSYS_MAX_SUBSYS_COUNT].debug;
logsys_loggers[subsysid].syslog_priority = logsys_loggers[LOGSYS_MAX_SUBSYS_COUNT].syslog_priority;
logsys_loggers[subsysid].logfile_priority = logsys_loggers[LOGSYS_MAX_SUBSYS_COUNT].logfile_priority;
logsys_loggers[subsysid].init_status = LOGSYS_LOGGER_INIT_DONE;
}
strncpy (logsys_loggers[subsysid].subsys, subsys,
sizeof (logsys_loggers[subsysid].subsys));
logsys_loggers[subsysid].subsys[
sizeof (logsys_loggers[subsysid].subsys) - 1] = '\0';
logsys_loggers[subsysid].file_idx = 0;
}
static const char *_logsys_tags_stringify(uint32_t tags)
{
if (tags == QB_LOG_TAG_LIBQB_MSG) {
return "QB";
} else {
return logsys_loggers[tags].subsys;
}
}
void logsys_system_fini (void)
{
int i;
int f;
for (i = 0; i < LOGSYS_MAX_SUBSYS_COUNT; i++) {
free(logsys_loggers[i].logfile);
for (f = 0; f < logsys_loggers[i].file_idx; f++) {
free(logsys_loggers[i].files[f]);
}
}
qb_log_fini ();
}
/*
* Internal API - exported
*/
int _logsys_system_setup(
const char *mainsystem,
unsigned int mode,
int syslog_facility,
int syslog_priority)
{
int i;
int32_t fidx;
char tempsubsys[LOGSYS_MAX_SUBSYS_NAMELEN];
if ((mainsystem == NULL) ||
(strlen(mainsystem) >= LOGSYS_MAX_SUBSYS_NAMELEN)) {
return -1;
}
i = LOGSYS_MAX_SUBSYS_COUNT;
pthread_mutex_lock (&logsys_config_mutex);
snprintf(logsys_loggers[i].subsys,
LOGSYS_MAX_SUBSYS_NAMELEN,
"%s", mainsystem);
logsys_loggers[i].mode = mode;
logsys_loggers[i].debug = 0;
logsys_loggers[i].file_idx = 0;
logsys_loggers[i].logfile_priority = syslog_priority;
logsys_loggers[i].syslog_priority = syslog_priority;
qb_log_init(mainsystem, syslog_facility, syslog_priority);
if (logsys_loggers[i].mode & LOGSYS_MODE_OUTPUT_STDERR) {
qb_log_ctl(QB_LOG_STDERR, QB_LOG_CONF_ENABLED, QB_TRUE);
} else {
qb_log_ctl(QB_LOG_STDERR, QB_LOG_CONF_ENABLED, QB_FALSE);
}
if (logsys_loggers[i].mode & LOGSYS_MODE_OUTPUT_SYSLOG) {
qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_ENABLED, QB_TRUE);
} else {
qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_ENABLED, QB_FALSE);
}
qb_log_filter_ctl(QB_LOG_BLACKBOX, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, "*", LOG_TRACE);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_SIZE, IPC_LOGSYS_SIZE);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_THREADED, QB_FALSE);
qb_log_ctl(QB_LOG_BLACKBOX, QB_LOG_CONF_ENABLED, QB_TRUE);
logsys_format_set(NULL);
qb_log_tags_stringify_fn_set(_logsys_tags_stringify);
logsys_loggers[i].init_status = LOGSYS_LOGGER_INIT_DONE;
logsys_system_needs_init = LOGSYS_LOGGER_INIT_DONE;
for (i = 0; i < LOGSYS_MAX_SUBSYS_COUNT; i++) {
if ((strcmp (logsys_loggers[i].subsys, "") != 0) &&
(logsys_loggers[i].init_status ==
LOGSYS_LOGGER_NEEDS_INIT)) {
fidx = logsys_loggers[i].file_idx;
strncpy (tempsubsys, logsys_loggers[i].subsys,
sizeof (tempsubsys));
tempsubsys[sizeof (tempsubsys) - 1] = '\0';
logsys_subsys_init(tempsubsys, i);
logsys_loggers[i].file_idx = fidx;
_logsys_config_mode_set_unlocked(i, logsys_loggers[i].mode);
_logsys_config_apply_per_subsys(i);
}
}
pthread_mutex_unlock (&logsys_config_mutex);
return (0);
}
static void _logsys_subsys_filename_add (int32_t s, const char *filename)
{
int i;
if (filename == NULL) {
return;
}
assert(logsys_loggers[s].file_idx < MAX_FILES_PER_SUBSYS);
assert(logsys_loggers[s].file_idx >= 0);
for (i = 0; i < logsys_loggers[s].file_idx; i++) {
if (strcmp(logsys_loggers[s].files[i], filename) == 0) {
return;
}
}
logsys_loggers[s].files[logsys_loggers[s].file_idx++] = strdup(filename);
if (logsys_system_needs_init == LOGSYS_LOGGER_INIT_DONE) {
_logsys_config_apply_per_file(s, filename);
}
}
int _logsys_subsys_create (const char *subsys, const char *filename)
{
int i;
if ((subsys == NULL) ||
(strlen(subsys) >= LOGSYS_MAX_SUBSYS_NAMELEN)) {
return -1;
}
pthread_mutex_lock (&logsys_config_mutex);
i = _logsys_config_subsys_get_unlocked (subsys);
if ((i > -1) && (i < LOGSYS_MAX_SUBSYS_COUNT)) {
_logsys_subsys_filename_add(i, filename);
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
for (i = 0; i < LOGSYS_MAX_SUBSYS_COUNT; i++) {
if (strcmp (logsys_loggers[i].subsys, "") == 0) {
logsys_subsys_init(subsys, i);
_logsys_subsys_filename_add(i, filename);
break;
}
}
if (i >= LOGSYS_MAX_SUBSYS_COUNT) {
i = -1;
}
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
int _logsys_config_subsys_get (const char *subsys)
{
unsigned int i;
pthread_mutex_lock (&logsys_config_mutex);
i = _logsys_config_subsys_get_unlocked (subsys);
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
static int32_t _logsys_config_mode_set_unlocked(int32_t subsysid, uint32_t new_mode)
{
if ( logsys_loggers[subsysid].mode == new_mode) {
return 0;
}
if (logsys_loggers[subsysid].target_id > 0) {
qb_log_ctl(logsys_loggers[subsysid].target_id,
QB_LOG_CONF_ENABLED,
(new_mode & LOGSYS_MODE_OUTPUT_FILE));
}
if (subsysid == LOGSYS_MAX_SUBSYS_COUNT) {
qb_log_ctl(QB_LOG_STDERR,
QB_LOG_CONF_ENABLED,
(new_mode & LOGSYS_MODE_OUTPUT_STDERR));
qb_log_ctl(QB_LOG_SYSLOG,
QB_LOG_CONF_ENABLED,
(new_mode & LOGSYS_MODE_OUTPUT_SYSLOG));
}
logsys_loggers[subsysid].mode = new_mode;
return 0;
}
int logsys_config_mode_set (const char *subsys, unsigned int mode)
{
int i;
pthread_mutex_lock (&logsys_config_mutex);
if (subsys != NULL) {
i = _logsys_config_subsys_get_unlocked (subsys);
if (i >= 0) {
i = _logsys_config_mode_set_unlocked(i, mode);
}
} else {
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
_logsys_config_mode_set_unlocked(i, mode);
}
i = 0;
}
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
unsigned int logsys_config_mode_get (const char *subsys)
{
int i;
i = _logsys_config_subsys_get (subsys);
if (i < 0) {
return i;
}
return logsys_loggers[i].mode;
}
int logsys_config_file_set (
const char *subsys,
const char **error_string,
const char *file)
{
int i;
int res;
pthread_mutex_lock (&logsys_config_mutex);
if (subsys != NULL) {
i = _logsys_config_subsys_get_unlocked (subsys);
if (i < 0) {
res = i;
} else {
res = logsys_config_file_set_unlocked(i, error_string, file);
}
} else {
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
res = logsys_config_file_set_unlocked(i, error_string, file);
if (res < 0) {
break;
}
}
}
pthread_mutex_unlock (&logsys_config_mutex);
return res;
}
int logsys_format_set (const char *format)
{
int ret = 0;
int i;
int c;
int w;
int reminder;
char syslog_format[128];
if (format_buffer) {
free(format_buffer);
format_buffer = NULL;
}
format_buffer = strdup(format ? format : "%7p [%6g] %b");
if (format_buffer == NULL) {
ret = -1;
}
qb_log_format_set(QB_LOG_STDERR, format_buffer);
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
if (logsys_loggers[i].target_id > 0) {
qb_log_format_set(logsys_loggers[i].target_id, format_buffer);
}
}
/*
* This just goes through and remove %t and %p from
* the format string for syslog.
*/
w = 0;
memset(syslog_format, '\0', sizeof(syslog_format));
for (c = 0; c < strlen(format_buffer); c++) {
if (format_buffer[c] == '%') {
reminder = c;
for (c++; c < strlen(format_buffer); c++) {
if (isdigit(format_buffer[c])) {
continue;
}
if (format_buffer[c] == 't' ||
format_buffer[c] == 'p') {
c++;
} else {
c = reminder;
}
break;
}
}
syslog_format[w] = format_buffer[c];
w++;
}
// printf("normal_format: %s\n", format_buffer);
// printf("syslog_format: %s\n", syslog_format);
qb_log_format_set(QB_LOG_SYSLOG, syslog_format);
return ret;
}
char *logsys_format_get (void)
{
return format_buffer;
}
int logsys_config_syslog_facility_set (
const char *subsys,
unsigned int facility)
{
return qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_FACILITY, facility);
}
int logsys_config_syslog_priority_set (
const char *subsys,
unsigned int priority)
{
int i;
pthread_mutex_lock (&logsys_config_mutex);
if (subsys != NULL) {
i = _logsys_config_subsys_get_unlocked (subsys);
if (i >= 0) {
logsys_loggers[i].syslog_priority = priority;
logsys_loggers[i].dirty = QB_TRUE;
i = 0;
}
} else {
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
logsys_loggers[i].syslog_priority = priority;
logsys_loggers[i].dirty = QB_TRUE;
}
i = 0;
}
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
int logsys_config_logfile_priority_set (
const char *subsys,
unsigned int priority)
{
int i;
pthread_mutex_lock (&logsys_config_mutex);
if (subsys != NULL) {
i = _logsys_config_subsys_get_unlocked (subsys);
if (i >= 0) {
logsys_loggers[i].logfile_priority = priority;
logsys_loggers[i].dirty = QB_TRUE;
i = 0;
}
} else {
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
logsys_loggers[i].logfile_priority = priority;
logsys_loggers[i].dirty = QB_TRUE;
}
i = 0;
}
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
static void _logsys_config_apply_per_file(int32_t s, const char *filename)
{
uint32_t syslog_priority = logsys_loggers[s].syslog_priority;
uint32_t logfile_priority = logsys_loggers[s].logfile_priority;
qb_log_filter_ctl(s, QB_LOG_TAG_SET, QB_LOG_FILTER_FILE,
filename, LOG_TRACE);
qb_log_filter_ctl(QB_LOG_SYSLOG, QB_LOG_FILTER_REMOVE,
QB_LOG_FILTER_FILE, filename, LOG_TRACE);
qb_log_filter_ctl(QB_LOG_STDERR, QB_LOG_FILTER_REMOVE,
QB_LOG_FILTER_FILE, filename, LOG_TRACE);
if (logsys_loggers[s].target_id > 0) {
qb_log_filter_ctl(logsys_loggers[s].target_id,
QB_LOG_FILTER_REMOVE,
QB_LOG_FILTER_FILE, filename, LOG_TRACE);
}
if (logsys_loggers[s].debug) {
syslog_priority = LOG_DEBUG;
logfile_priority = LOG_DEBUG;
}
qb_log_filter_ctl(QB_LOG_SYSLOG, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, filename,
syslog_priority);
qb_log_filter_ctl(QB_LOG_STDERR, QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, filename,
logfile_priority);
if (logsys_loggers[s].target_id > 0) {
qb_log_filter_ctl(logsys_loggers[s].target_id,
QB_LOG_FILTER_ADD,
QB_LOG_FILTER_FILE, filename,
logfile_priority);
}
}
static void _logsys_config_apply_per_subsys(int32_t s)
{
int32_t f;
for (f = 0; f < logsys_loggers[s].file_idx; f++) {
_logsys_config_apply_per_file(s, logsys_loggers[s].files[f]);
}
logsys_loggers[s].dirty = QB_FALSE;
}
void logsys_config_apply(void)
{
int32_t s;
for (s = 0; s <= LOGSYS_MAX_SUBSYS_COUNT; s++) {
if (strcmp(logsys_loggers[s].subsys, "") == 0) {
continue;
}
_logsys_config_apply_per_subsys(s);
}
}
int logsys_config_debug_set (
const char *subsys,
unsigned int debug)
{
int i;
pthread_mutex_lock (&logsys_config_mutex);
if (subsys != NULL) {
i = _logsys_config_subsys_get_unlocked (subsys);
if (i >= 0) {
logsys_loggers[i].dirty = QB_TRUE;
logsys_loggers[i].debug = debug;
i = 0;
}
} else {
for (i = 0; i <= LOGSYS_MAX_SUBSYS_COUNT; i++) {
logsys_loggers[i].debug = debug;
logsys_loggers[i].dirty = QB_TRUE;
}
i = 0;
}
pthread_mutex_unlock (&logsys_config_mutex);
return i;
}
int logsys_priority_id_get (const char *name)
{
unsigned int i;
for (i = 0; prioritynames[i].c_name != NULL; i++) {
if (strcasecmp(name, prioritynames[i].c_name) == 0) {
return (prioritynames[i].c_val);
}
}
return (-1);
}
const char *logsys_priority_name_get (unsigned int priority)
{
unsigned int i;
for (i = 0; prioritynames[i].c_name != NULL; i++) {
if (priority == prioritynames[i].c_val) {
return (prioritynames[i].c_name);
}
}
return (NULL);
}

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