diff options
Diffstat (limited to 'libnetdata/log/log.c')
| -rw-r--r-- | libnetdata/log/log.c | 2431 |
1 files changed, 2431 insertions, 0 deletions
diff --git a/libnetdata/log/log.c b/libnetdata/log/log.c new file mode 100644 index 00000000..c805716c --- /dev/null +++ b/libnetdata/log/log.c @@ -0,0 +1,2431 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#define SD_JOURNAL_SUPPRESS_LOCATION + +#include "../libnetdata.h" +#include <daemon/main.h> + +#ifdef __FreeBSD__ +#include <sys/endian.h> +#endif + +#ifdef __APPLE__ +#include <machine/endian.h> +#endif + +#ifdef HAVE_BACKTRACE +#include <execinfo.h> +#endif + +#ifdef HAVE_SYSTEMD +#include <systemd/sd-journal.h> +#endif + +#include <syslog.h> + +const char *program_name = ""; + +uint64_t debug_flags = 0; + +#ifdef ENABLE_ACLK +int aclklog_enabled = 0; +#endif + +// ---------------------------------------------------------------------------- + +struct nd_log_source; +static bool nd_log_limit_reached(struct nd_log_source *source); + +// ---------------------------------------------------------------------------- +// logging method + +typedef enum __attribute__((__packed__)) { + NDLM_DISABLED = 0, + NDLM_DEVNULL, + NDLM_DEFAULT, + NDLM_JOURNAL, + NDLM_SYSLOG, + NDLM_STDOUT, + NDLM_STDERR, + NDLM_FILE, +} ND_LOG_METHOD; + +static struct { + ND_LOG_METHOD method; + const char *name; +} nd_log_methods[] = { + { .method = NDLM_DISABLED, .name = "none" }, + { .method = NDLM_DEVNULL, .name = "/dev/null" }, + { .method = NDLM_DEFAULT, .name = "default" }, + { .method = NDLM_JOURNAL, .name = "journal" }, + { .method = NDLM_SYSLOG, .name = "syslog" }, + { .method = NDLM_STDOUT, .name = "stdout" }, + { .method = NDLM_STDERR, .name = "stderr" }, + { .method = NDLM_FILE, .name = "file" }, +}; + +static ND_LOG_METHOD nd_log_method2id(const char *method) { + if(!method || !*method) + return NDLM_DEFAULT; + + size_t entries = sizeof(nd_log_methods) / sizeof(nd_log_methods[0]); + for(size_t i = 0; i < entries ;i++) { + if(strcmp(nd_log_methods[i].name, method) == 0) + return nd_log_methods[i].method; + } + + return NDLM_FILE; +} + +static const char *nd_log_id2method(ND_LOG_METHOD method) { + size_t entries = sizeof(nd_log_methods) / sizeof(nd_log_methods[0]); + for(size_t i = 0; i < entries ;i++) { + if(method == nd_log_methods[i].method) + return nd_log_methods[i].name; + } + + return "unknown"; +} + +#define IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(ndlo) ((ndlo) == NDLM_JOURNAL || (ndlo) == NDLM_SYSLOG || (ndlo) == NDLM_STDERR) + +const char *nd_log_method_for_external_plugins(const char *s) { + if(s && *s) { + ND_LOG_METHOD method = nd_log_method2id(s); + if(IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(method)) + return nd_log_id2method(method); + } + + return nd_log_id2method(NDLM_STDERR); +} + +// ---------------------------------------------------------------------------- +// workaround strerror_r() + +#if defined(STRERROR_R_CHAR_P) +// GLIBC version of strerror_r +static const char *strerror_result(const char *a, const char *b) { (void)b; return a; } +#elif defined(HAVE_STRERROR_R) +// POSIX version of strerror_r +static const char *strerror_result(int a, const char *b) { (void)a; return b; } +#elif defined(HAVE_C__GENERIC) + +// what a trick! +// http://stackoverflow.com/questions/479207/function-overloading-in-c +static const char *strerror_result_int(int a, const char *b) { (void)a; return b; } +static const char *strerror_result_string(const char *a, const char *b) { (void)b; return a; } + +#define strerror_result(a, b) _Generic((a), \ + int: strerror_result_int, \ + char *: strerror_result_string \ + )(a, b) + +#else +#error "cannot detect the format of function strerror_r()" +#endif + +static const char *errno2str(int errnum, char *buf, size_t size) { + return strerror_result(strerror_r(errnum, buf, size), buf); +} + +// ---------------------------------------------------------------------------- +// facilities +// +// sys/syslog.h (Linux) +// sys/sys/syslog.h (FreeBSD) +// bsd/sys/syslog.h (darwin-xnu) + +static struct { + int facility; + const char *name; +} nd_log_facilities[] = { + { LOG_AUTH, "auth" }, + { LOG_AUTHPRIV, "authpriv" }, + { LOG_CRON, "cron" }, + { LOG_DAEMON, "daemon" }, + { LOG_FTP, "ftp" }, + { LOG_KERN, "kern" }, + { LOG_LPR, "lpr" }, + { LOG_MAIL, "mail" }, + { LOG_NEWS, "news" }, + { LOG_SYSLOG, "syslog" }, + { LOG_USER, "user" }, + { LOG_UUCP, "uucp" }, + { LOG_LOCAL0, "local0" }, + { LOG_LOCAL1, "local1" }, + { LOG_LOCAL2, "local2" }, + { LOG_LOCAL3, "local3" }, + { LOG_LOCAL4, "local4" }, + { LOG_LOCAL5, "local5" }, + { LOG_LOCAL6, "local6" }, + { LOG_LOCAL7, "local7" }, + +#ifdef __FreeBSD__ + { LOG_CONSOLE, "console" }, + { LOG_NTP, "ntp" }, + + // FreeBSD does not consider 'security' as deprecated. + { LOG_SECURITY, "security" }, +#else + // For all other O/S 'security' is mapped to 'auth'. + { LOG_AUTH, "security" }, +#endif + +#ifdef __APPLE__ + { LOG_INSTALL, "install" }, + { LOG_NETINFO, "netinfo" }, + { LOG_RAS, "ras" }, + { LOG_REMOTEAUTH, "remoteauth" }, + { LOG_LAUNCHD, "launchd" }, + +#endif +}; + +static int nd_log_facility2id(const char *facility) { + size_t entries = sizeof(nd_log_facilities) / sizeof(nd_log_facilities[0]); + for(size_t i = 0; i < entries ;i++) { + if(strcmp(nd_log_facilities[i].name, facility) == 0) + return nd_log_facilities[i].facility; + } + + return LOG_DAEMON; +} + +static const char *nd_log_id2facility(int facility) { + size_t entries = sizeof(nd_log_facilities) / sizeof(nd_log_facilities[0]); + for(size_t i = 0; i < entries ;i++) { + if(nd_log_facilities[i].facility == facility) + return nd_log_facilities[i].name; + } + + return "daemon"; +} + +// ---------------------------------------------------------------------------- +// priorities + +static struct { + ND_LOG_FIELD_PRIORITY priority; + const char *name; +} nd_log_priorities[] = { + { .priority = NDLP_EMERG, .name = "emergency" }, + { .priority = NDLP_EMERG, .name = "emerg" }, + { .priority = NDLP_ALERT, .name = "alert" }, + { .priority = NDLP_CRIT, .name = "critical" }, + { .priority = NDLP_CRIT, .name = "crit" }, + { .priority = NDLP_ERR, .name = "error" }, + { .priority = NDLP_ERR, .name = "err" }, + { .priority = NDLP_WARNING, .name = "warning" }, + { .priority = NDLP_WARNING, .name = "warn" }, + { .priority = NDLP_NOTICE, .name = "notice" }, + { .priority = NDLP_INFO, .name = NDLP_INFO_STR }, + { .priority = NDLP_DEBUG, .name = "debug" }, +}; + +int nd_log_priority2id(const char *priority) { + size_t entries = sizeof(nd_log_priorities) / sizeof(nd_log_priorities[0]); + for(size_t i = 0; i < entries ;i++) { + if(strcmp(nd_log_priorities[i].name, priority) == 0) + return nd_log_priorities[i].priority; + } + + return NDLP_INFO; +} + +const char *nd_log_id2priority(ND_LOG_FIELD_PRIORITY priority) { + size_t entries = sizeof(nd_log_priorities) / sizeof(nd_log_priorities[0]); + for(size_t i = 0; i < entries ;i++) { + if(priority == nd_log_priorities[i].priority) + return nd_log_priorities[i].name; + } + + return NDLP_INFO_STR; +} + +// ---------------------------------------------------------------------------- +// log sources + +const char *nd_log_sources[] = { + [NDLS_UNSET] = "UNSET", + [NDLS_ACCESS] = "access", + [NDLS_ACLK] = "aclk", + [NDLS_COLLECTORS] = "collector", + [NDLS_DAEMON] = "daemon", + [NDLS_HEALTH] = "health", + [NDLS_DEBUG] = "debug", +}; + +size_t nd_log_source2id(const char *source, ND_LOG_SOURCES def) { + size_t entries = sizeof(nd_log_sources) / sizeof(nd_log_sources[0]); + for(size_t i = 0; i < entries ;i++) { + if(strcmp(nd_log_sources[i], source) == 0) + return i; + } + + return def; +} + + +static const char *nd_log_id2source(ND_LOG_SOURCES source) { + size_t entries = sizeof(nd_log_sources) / sizeof(nd_log_sources[0]); + if(source < entries) + return nd_log_sources[source]; + + return nd_log_sources[NDLS_COLLECTORS]; +} + +// ---------------------------------------------------------------------------- +// log output formats + +typedef enum __attribute__((__packed__)) { + NDLF_JOURNAL, + NDLF_LOGFMT, + NDLF_JSON, +} ND_LOG_FORMAT; + +static struct { + ND_LOG_FORMAT format; + const char *name; +} nd_log_formats[] = { + { .format = NDLF_JOURNAL, .name = "journal" }, + { .format = NDLF_LOGFMT, .name = "logfmt" }, + { .format = NDLF_JSON, .name = "json" }, +}; + +static ND_LOG_FORMAT nd_log_format2id(const char *format) { + if(!format || !*format) + return NDLF_LOGFMT; + + size_t entries = sizeof(nd_log_formats) / sizeof(nd_log_formats[0]); + for(size_t i = 0; i < entries ;i++) { + if(strcmp(nd_log_formats[i].name, format) == 0) + return nd_log_formats[i].format; + } + + return NDLF_LOGFMT; +} + +static const char *nd_log_id2format(ND_LOG_FORMAT format) { + size_t entries = sizeof(nd_log_formats) / sizeof(nd_log_formats[0]); + for(size_t i = 0; i < entries ;i++) { + if(format == nd_log_formats[i].format) + return nd_log_formats[i].name; + } + + return "logfmt"; +} + +// ---------------------------------------------------------------------------- +// format dates + +void log_date(char *buffer, size_t len, time_t now) { + if(unlikely(!buffer || !len)) + return; + + time_t t = now; + struct tm *tmp, tmbuf; + + tmp = localtime_r(&t, &tmbuf); + + if (unlikely(!tmp)) { + buffer[0] = '\0'; + return; + } + + if (unlikely(strftime(buffer, len, "%Y-%m-%d %H:%M:%S", tmp) == 0)) + buffer[0] = '\0'; + + buffer[len - 1] = '\0'; +} + +// ---------------------------------------------------------------------------- + +struct nd_log_limit { + usec_t started_monotonic_ut; + uint32_t counter; + uint32_t prevented; + + uint32_t throttle_period; + uint32_t logs_per_period; + uint32_t logs_per_period_backup; +}; + +#define ND_LOG_LIMITS_DEFAULT (struct nd_log_limit){ .logs_per_period = ND_LOG_DEFAULT_THROTTLE_LOGS, .logs_per_period_backup = ND_LOG_DEFAULT_THROTTLE_LOGS, .throttle_period = ND_LOG_DEFAULT_THROTTLE_PERIOD, } +#define ND_LOG_LIMITS_UNLIMITED (struct nd_log_limit){ .logs_per_period = 0, .logs_per_period_backup = 0, .throttle_period = 0, } + +struct nd_log_source { + SPINLOCK spinlock; + ND_LOG_METHOD method; + ND_LOG_FORMAT format; + const char *filename; + int fd; + FILE *fp; + + ND_LOG_FIELD_PRIORITY min_priority; + const char *pending_msg; + struct nd_log_limit limits; +}; + +static __thread ND_LOG_SOURCES overwrite_thread_source = 0; + +void nd_log_set_thread_source(ND_LOG_SOURCES source) { + overwrite_thread_source = source; +} + +static struct { + uuid_t invocation_id; + + ND_LOG_SOURCES overwrite_process_source; + + struct nd_log_source sources[_NDLS_MAX]; + + struct { + bool initialized; + } journal; + + struct { + bool initialized; + int fd; + char filename[FILENAME_MAX + 1]; + } journal_direct; + + struct { + bool initialized; + int facility; + } syslog; + + struct { + SPINLOCK spinlock; + bool initialized; + } std_output; + + struct { + SPINLOCK spinlock; + bool initialized; + } std_error; + +} nd_log = { + .overwrite_process_source = 0, + .journal = { + .initialized = false, + }, + .journal_direct = { + .initialized = false, + .fd = -1, + }, + .syslog = { + .initialized = false, + .facility = LOG_DAEMON, + }, + .std_output = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .initialized = false, + }, + .std_error = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .initialized = false, + }, + .sources = { + [NDLS_UNSET] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DISABLED, + .format = NDLF_JOURNAL, + .filename = NULL, + .fd = -1, + .fp = NULL, + .min_priority = NDLP_EMERG, + .limits = ND_LOG_LIMITS_UNLIMITED, + }, + [NDLS_ACCESS] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DEFAULT, + .format = NDLF_LOGFMT, + .filename = LOG_DIR "/access.log", + .fd = -1, + .fp = NULL, + .min_priority = NDLP_DEBUG, + .limits = ND_LOG_LIMITS_UNLIMITED, + }, + [NDLS_ACLK] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_FILE, + .format = NDLF_LOGFMT, + .filename = LOG_DIR "/aclk.log", + .fd = -1, + .fp = NULL, + .min_priority = NDLP_DEBUG, + .limits = ND_LOG_LIMITS_UNLIMITED, + }, + [NDLS_COLLECTORS] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DEFAULT, + .format = NDLF_LOGFMT, + .filename = LOG_DIR "/collectors.log", + .fd = STDERR_FILENO, + .fp = NULL, + .min_priority = NDLP_INFO, + .limits = ND_LOG_LIMITS_DEFAULT, + }, + [NDLS_DEBUG] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DISABLED, + .format = NDLF_LOGFMT, + .filename = LOG_DIR "/debug.log", + .fd = STDOUT_FILENO, + .fp = NULL, + .min_priority = NDLP_DEBUG, + .limits = ND_LOG_LIMITS_UNLIMITED, + }, + [NDLS_DAEMON] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DEFAULT, + .filename = LOG_DIR "/daemon.log", + .format = NDLF_LOGFMT, + .fd = -1, + .fp = NULL, + .min_priority = NDLP_INFO, + .limits = ND_LOG_LIMITS_DEFAULT, + }, + [NDLS_HEALTH] = { + .spinlock = NETDATA_SPINLOCK_INITIALIZER, + .method = NDLM_DEFAULT, + .format = NDLF_LOGFMT, + .filename = LOG_DIR "/health.log", + .fd = -1, + .fp = NULL, + .min_priority = NDLP_DEBUG, + .limits = ND_LOG_LIMITS_UNLIMITED, + }, + }, +}; + +__attribute__((constructor)) void initialize_invocation_id(void) { + // check for a NETDATA_INVOCATION_ID + if(uuid_parse_flexi(getenv("NETDATA_INVOCATION_ID"), nd_log.invocation_id) != 0) { + // not found, check for systemd set INVOCATION_ID + if(uuid_parse_flexi(getenv("INVOCATION_ID"), nd_log.invocation_id) != 0) { + // not found, generate a new one + uuid_generate_random(nd_log.invocation_id); + } + } + + char uuid[UUID_COMPACT_STR_LEN]; + uuid_unparse_lower_compact(nd_log.invocation_id, uuid); + setenv("NETDATA_INVOCATION_ID", uuid, 1); +} + +int nd_log_health_fd(void) { + if(nd_log.sources[NDLS_HEALTH].method == NDLM_FILE && nd_log.sources[NDLS_HEALTH].fd != -1) + return nd_log.sources[NDLS_HEALTH].fd; + + return STDERR_FILENO; +} + +void nd_log_set_user_settings(ND_LOG_SOURCES source, const char *setting) { + char buf[FILENAME_MAX + 100]; + if(setting && *setting) + strncpyz(buf, setting, sizeof(buf) - 1); + else + buf[0] = '\0'; + + struct nd_log_source *ls = &nd_log.sources[source]; + char *output = strrchr(buf, '@'); + + if(!output) + // all of it is the output + output = buf; + else { + // we found an '@', the next char is the output + *output = '\0'; + output++; + + // parse the other params + char *remaining = buf; + while(remaining) { + char *value = strsep_skip_consecutive_separators(&remaining, ","); + if (!value || !*value) continue; + + char *name = strsep_skip_consecutive_separators(&value, "="); + if (!name || !*name) continue; + + if(strcmp(name, "logfmt") == 0) + ls->format = NDLF_LOGFMT; + else if(strcmp(name, "json") == 0) + ls->format = NDLF_JSON; + else if(strcmp(name, "journal") == 0) + ls->format = NDLF_JOURNAL; + else if(strcmp(name, "level") == 0 && value && *value) + ls->min_priority = nd_log_priority2id(value); + else if(strcmp(name, "protection") == 0 && value && *value) { + if(strcmp(value, "off") == 0 || strcmp(value, "none") == 0) { + ls->limits = ND_LOG_LIMITS_UNLIMITED; + ls->limits.counter = 0; + ls->limits.prevented = 0; + } + else { + ls->limits = ND_LOG_LIMITS_DEFAULT; + + char *slash = strchr(value, '/'); + if(slash) { + *slash = '\0'; + slash++; + ls->limits.logs_per_period = ls->limits.logs_per_period_backup = str2u(value); + ls->limits.throttle_period = str2u(slash); + } + else { + ls->limits.logs_per_period = ls->limits.logs_per_period_backup = str2u(value); + ls->limits.throttle_period = ND_LOG_DEFAULT_THROTTLE_PERIOD; + } + } + } + else + nd_log(NDLS_DAEMON, NDLP_ERR, "Error while parsing configuration of log source '%s'. " + "In config '%s', '%s' is not understood.", + nd_log_id2source(source), setting, name); + } + } + + if(!output || !*output || strcmp(output, "none") == 0 || strcmp(output, "off") == 0) { + ls->method = NDLM_DISABLED; + ls->filename = "/dev/null"; + } + else if(strcmp(output, "journal") == 0) { + ls->method = NDLM_JOURNAL; + ls->filename = NULL; + } + else if(strcmp(output, "syslog") == 0) { + ls->method = NDLM_SYSLOG; + ls->filename = NULL; + } + else if(strcmp(output, "/dev/null") == 0) { + ls->method = NDLM_DEVNULL; + ls->filename = "/dev/null"; + } + else if(strcmp(output, "system") == 0) { + if(ls->fd == STDERR_FILENO) { + ls->method = NDLM_STDERR; + ls->filename = NULL; + ls->fd = STDERR_FILENO; + } + else { + ls->method = NDLM_STDOUT; + ls->filename = NULL; + ls->fd = STDOUT_FILENO; + } + } + else if(strcmp(output, "stderr") == 0) { + ls->method = NDLM_STDERR; + ls->filename = NULL; + ls->fd = STDERR_FILENO; + } + else if(strcmp(output, "stdout") == 0) { + ls->method = NDLM_STDOUT; + ls->filename = NULL; + ls->fd = STDOUT_FILENO; + } + else { + ls->method = NDLM_FILE; + ls->filename = strdupz(output); + } + +#if defined(NETDATA_INTERNAL_CHECKS) || defined(NETDATA_DEV_MODE) + ls->min_priority = NDLP_DEBUG; +#endif + + if(source == NDLS_COLLECTORS) { + // set the method for the collector processes we will spawn + + ND_LOG_METHOD method; + ND_LOG_FORMAT format = ls->format; + ND_LOG_FIELD_PRIORITY priority = ls->min_priority; + + if(ls->method == NDLM_SYSLOG || ls->method == NDLM_JOURNAL) + method = ls->method; + else + method = NDLM_STDERR; + + setenv("NETDATA_LOG_METHOD", nd_log_id2method(method), 1); + setenv("NETDATA_LOG_FORMAT", nd_log_id2format(format), 1); + setenv("NETDATA_LOG_LEVEL", nd_log_id2priority(priority), 1); + } +} + +void nd_log_set_priority_level(const char *setting) { + if(!setting || !*setting) + setting = "info"; + + ND_LOG_FIELD_PRIORITY priority = nd_log_priority2id(setting); + +#if defined(NETDATA_INTERNAL_CHECKS) || defined(NETDATA_DEV_MODE) + priority = NDLP_DEBUG; +#endif + + for (size_t i = 0; i < _NDLS_MAX; i++) { + if (i != NDLS_DEBUG) + nd_log.sources[i].min_priority = priority; + } + + // the right one + setenv("NETDATA_LOG_LEVEL", nd_log_id2priority(priority), 1); +} + +void nd_log_set_facility(const char *facility) { + if(!facility || !*facility) + facility = "daemon"; + + nd_log.syslog.facility = nd_log_facility2id(facility); + setenv("NETDATA_SYSLOG_FACILITY", nd_log_id2facility(nd_log.syslog.facility), 1); +} + +void nd_log_set_flood_protection(size_t logs, time_t period) { + nd_log.sources[NDLS_DAEMON].limits.logs_per_period = + nd_log.sources[NDLS_DAEMON].limits.logs_per_period_backup; + nd_log.sources[NDLS_COLLECTORS].limits.logs_per_period = + nd_log.sources[NDLS_COLLECTORS].limits.logs_per_period_backup = logs; + + nd_log.sources[NDLS_DAEMON].limits.throttle_period = + nd_log.sources[NDLS_COLLECTORS].limits.throttle_period = period; + + char buf[100]; + snprintfz(buf, sizeof(buf), "%" PRIu64, (uint64_t )period); + setenv("NETDATA_ERRORS_THROTTLE_PERIOD", buf, 1); + snprintfz(buf, sizeof(buf), "%" PRIu64, (uint64_t )logs); + setenv("NETDATA_ERRORS_PER_PERIOD", buf, 1); +} + +static bool nd_log_journal_systemd_init(void) { +#ifdef HAVE_SYSTEMD + nd_log.journal.initialized = true; +#else + nd_log.journal.initialized = false; +#endif + + return nd_log.journal.initialized; +} + +static void nd_log_journal_direct_set_env(void) { + if(nd_log.sources[NDLS_COLLECTORS].method == NDLM_JOURNAL) + setenv("NETDATA_SYSTEMD_JOURNAL_PATH", nd_log.journal_direct.filename, 1); +} + +static bool nd_log_journal_direct_init(const char *path) { + if(nd_log.journal_direct.initialized) { + nd_log_journal_direct_set_env(); + return true; + } + + int fd; + char filename[FILENAME_MAX + 1]; + if(!is_path_unix_socket(path)) { + + journal_construct_path(filename, sizeof(filename), netdata_configured_host_prefix, "netdata"); + if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) { + + journal_construct_path(filename, sizeof(filename), netdata_configured_host_prefix, NULL); + if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) { + + journal_construct_path(filename, sizeof(filename), NULL, "netdata"); + if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) { + + journal_construct_path(filename, sizeof(filename), NULL, NULL); + if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) + return false; + } + } + } + } + else { + snprintfz(filename, sizeof(filename), "%s", path); + fd = journal_direct_fd(filename); + } + + if(fd < 0) + return false; + + nd_log.journal_direct.fd = fd; + nd_log.journal_direct.initialized = true; + + strncpyz(nd_log.journal_direct.filename, filename, sizeof(nd_log.journal_direct.filename) - 1); + nd_log_journal_direct_set_env(); + + return true; +} + +static void nd_log_syslog_init() { + if(nd_log.syslog.initialized) + return; + + openlog(program_name, LOG_PID, nd_log.syslog.facility); + nd_log.syslog.initialized = true; +} + +void nd_log_initialize_for_external_plugins(const char *name) { + // if we don't run under Netdata, log to stderr, + // otherwise, use the logging method Netdata wants us to use. + setenv("NETDATA_LOG_METHOD", "stderr", 0); + setenv("NETDATA_LOG_FORMAT", "logfmt", 0); + + nd_log.overwrite_process_source = NDLS_COLLECTORS; + program_name = name; + + for(size_t i = 0; i < _NDLS_MAX ;i++) { + nd_log.sources[i].method = STDERR_FILENO; + nd_log.sources[i].fd = -1; + nd_log.sources[i].fp = NULL; + } + + nd_log_set_priority_level(getenv("NETDATA_LOG_LEVEL")); + nd_log_set_facility(getenv("NETDATA_SYSLOG_FACILITY")); + + time_t period = 1200; + size_t logs = 200; + const char *s = getenv("NETDATA_ERRORS_THROTTLE_PERIOD"); + if(s && *s >= '0' && *s <= '9') { + period = str2l(s); + if(period < 0) period = 0; + } + + s = getenv("NETDATA_ERRORS_PER_PERIOD"); + if(s && *s >= '0' && *s <= '9') + logs = str2u(s); + + nd_log_set_flood_protection(logs, period); + + if(!netdata_configured_host_prefix) { + s = getenv("NETDATA_HOST_PREFIX"); + if(s && *s) + netdata_configured_host_prefix = (char *)s; + } + + ND_LOG_METHOD method = nd_log_method2id(getenv("NETDATA_LOG_METHOD")); + ND_LOG_FORMAT format = nd_log_format2id(getenv("NETDATA_LOG_FORMAT")); + + if(!IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(method)) { + if(is_stderr_connected_to_journal()) { + nd_log(NDLS_COLLECTORS, NDLP_WARNING, "NETDATA_LOG_METHOD is not set. Using journal."); + method = NDLM_JOURNAL; + } + else { + nd_log(NDLS_COLLECTORS, NDLP_WARNING, "NETDATA_LOG_METHOD is not set. Using stderr."); + method = NDLM_STDERR; + } + } + + switch(method) { + case NDLM_JOURNAL: + if(!nd_log_journal_direct_init(getenv("NETDATA_SYSTEMD_JOURNAL_PATH")) || + !nd_log_journal_direct_init(NULL) || !nd_log_journal_systemd_init()) { + nd_log(NDLS_COLLECTORS, NDLP_WARNING, "Failed to initialize journal. Using stderr."); + method = NDLM_STDERR; + } + break; + + case NDLM_SYSLOG: + nd_log_syslog_init(); + break; + + default: + method = NDLM_STDERR; + break; + } + + for(size_t i = 0; i < _NDLS_MAX ;i++) { + nd_log.sources[i].method = method; + nd_log.sources[i].format = format; + nd_log.sources[i].fd = -1; + nd_log.sources[i].fp = NULL; + } + +// nd_log(NDLS_COLLECTORS, NDLP_NOTICE, "FINAL_LOG_METHOD: %s", nd_log_id2method(method)); +} + +static bool nd_log_replace_existing_fd(struct nd_log_source *e, int new_fd) { + if(new_fd == -1 || e->fd == -1 || + (e->fd == STDOUT_FILENO && nd_log.std_output.initialized) || + (e->fd == STDERR_FILENO && nd_log.std_error.initialized)) + return false; + + if(new_fd != e->fd) { + int t = dup2(new_fd, e->fd); + + bool ret = true; + if (t == -1) { + netdata_log_error("Cannot dup2() new fd %d to old fd %d for '%s'", new_fd, e->fd, e->filename); + ret = false; + } + else + close(new_fd); + + if(e->fd == STDOUT_FILENO) + nd_log.std_output.initialized = true; + else if(e->fd == STDERR_FILENO) + nd_log.std_error.initialized = true; + + return ret; + } + + return false; +} + +static void nd_log_open(struct nd_log_source *e, ND_LOG_SOURCES source) { + if(e->method == NDLM_DEFAULT) + nd_log_set_user_settings(source, e->filename); + + if((e->method == NDLM_FILE && !e->filename) || + (e->method == NDLM_DEVNULL && e->fd == -1)) + e->method = NDLM_DISABLED; + + if(e->fp) + fflush(e->fp); + + switch(e->method) { + case NDLM_SYSLOG: + nd_log_syslog_init(); + break; + + case NDLM_JOURNAL: + nd_log_journal_direct_init(NULL); + nd_log_journal_systemd_init(); + break; + + case NDLM_STDOUT: + e->fp = stdout; + e->fd = STDOUT_FILENO; + break; + + case NDLM_DISABLED: + break; + + case NDLM_DEFAULT: + case NDLM_STDERR: + e->method = NDLM_STDERR; + e->fp = stderr; + e->fd = STDERR_FILENO; + break; + + case NDLM_DEVNULL: + case NDLM_FILE: { + int fd = open(e->filename, O_WRONLY | O_APPEND | O_CREAT, 0664); + if(fd == -1) { + if(e->fd != STDOUT_FILENO && e->fd != STDERR_FILENO) { + e->fd = STDERR_FILENO; + e->method = NDLM_STDERR; + netdata_log_error("Cannot open log file '%s'. Falling back to stderr.", e->filename); + } + else + netdata_log_error("Cannot open log file '%s'. Leaving fd %d as-is.", e->filename, e->fd); + } + else { + if (!nd_log_replace_existing_fd(e, fd)) { + if(e->fd == STDOUT_FILENO || e->fd == STDERR_FILENO) { + if(e->fd == STDOUT_FILENO) + e->method = NDLM_STDOUT; + else if(e->fd == STDERR_FILENO) + e->method = NDLM_STDERR; + + // we have dup2() fd, so we can close the one we opened + if(fd != STDOUT_FILENO && fd != STDERR_FILENO) + close(fd); + } + else + e->fd = fd; + } + } + + // at this point we have e->fd set properly + + if(e->fd == STDOUT_FILENO) + e->fp = stdout; + else if(e->fd == STDERR_FILENO) + e->fp = stderr; + + if(!e->fp) { + e->fp = fdopen(e->fd, "a"); + if (!e->fp) { + netdata_log_error("Cannot fdopen() fd %d ('%s')", e->fd, e->filename); + + if(e->fd != STDOUT_FILENO && e->fd != STDERR_FILENO) + close(e->fd); + + e->fp = stderr; + e->fd = STDERR_FILENO; + } + } + else { + if (setvbuf(e->fp, NULL, _IOLBF, 0) != 0) + netdata_log_error("Cannot set line buffering on fd %d ('%s')", e->fd, e->filename); + } + } + break; + } +} + +static void nd_log_stdin_init(int fd, const char *filename) { + int f = open(filename, O_WRONLY | O_APPEND | O_CREAT, 0664); + if(f == -1) + return; + + if(f != fd) { + dup2(f, fd); + close(f); + } +} + +void nd_log_initialize(void) { + nd_log_stdin_init(STDIN_FILENO, "/dev/null"); + + for(size_t i = 0 ; i < _NDLS_MAX ; i++) + nd_log_open(&nd_log.sources[i], i); +} + +void nd_log_reopen_log_files(void) { + netdata_log_info("Reopening all log files."); + + nd_log.std_output.initialized = false; + nd_log.std_error.initialized = false; + nd_log_initialize(); + + netdata_log_info("Log files re-opened."); +} + +void chown_open_file(int fd, uid_t uid, gid_t gid) { + if(fd == -1) return; + + struct stat buf; + + if(fstat(fd, &buf) == -1) { + netdata_log_error("Cannot fstat() fd %d", fd); + return; + } + + if((buf.st_uid != uid || buf.st_gid != gid) && S_ISREG(buf.st_mode)) { + if(fchown(fd, uid, gid) == -1) + netdata_log_error("Cannot fchown() fd %d.", fd); + } +} + +void nd_log_chown_log_files(uid_t uid, gid_t gid) { + for(size_t i = 0 ; i < _NDLS_MAX ; i++) { + if(nd_log.sources[i].fd != -1 && nd_log.sources[i].fd != STDIN_FILENO) + chown_open_file(nd_log.sources[i].fd, uid, gid); + } +} + +// ---------------------------------------------------------------------------- +// annotators +struct log_field; +static void errno_annotator(BUFFER *wb, const char *key, struct log_field *lf); +static void priority_annotator(BUFFER *wb, const char *key, struct log_field *lf); +static void timestamp_usec_annotator(BUFFER *wb, const char *key, struct log_field *lf); + +// ---------------------------------------------------------------------------- + +typedef void (*annotator_t)(BUFFER *wb, const char *key, struct log_field *lf); + +struct log_field { + const char *journal; + const char *logfmt; + annotator_t logfmt_annotator; + struct log_stack_entry entry; +}; + +#define THREAD_LOG_STACK_MAX 50 + +static __thread struct log_stack_entry *thread_log_stack_base[THREAD_LOG_STACK_MAX]; +static __thread size_t thread_log_stack_next = 0; + +static __thread struct log_field thread_log_fields[_NDF_MAX] = { + // THE ORDER DEFINES THE ORDER FIELDS WILL APPEAR IN logfmt + + [NDF_STOP] = { // processing will not stop on this - so it is ok to be first + .journal = NULL, + .logfmt = NULL, + .logfmt_annotator = NULL, + }, + [NDF_TIMESTAMP_REALTIME_USEC] = { + .journal = NULL, + .logfmt = "time", + .logfmt_annotator = timestamp_usec_annotator, + }, + [NDF_SYSLOG_IDENTIFIER] = { + .journal = "SYSLOG_IDENTIFIER", // standard journald field + .logfmt = "comm", + }, + [NDF_LOG_SOURCE] = { + .journal = "ND_LOG_SOURCE", + .logfmt = "source", + }, + [NDF_PRIORITY] = { + .journal = "PRIORITY", // standard journald field + .logfmt = "level", + .logfmt_annotator = priority_annotator, + }, + [NDF_ERRNO] = { + .journal = "ERRNO", // standard journald field + .logfmt = "errno", + .logfmt_annotator = errno_annotator, + }, + [NDF_INVOCATION_ID] = { + .journal = "INVOCATION_ID", // standard journald field + .logfmt = NULL, + }, + [NDF_LINE] = { + .journal = "CODE_LINE", // standard journald field + .logfmt = NULL, + }, + [NDF_FILE] = { + .journal = "CODE_FILE", // standard journald field + .logfmt = NULL, + }, + [NDF_FUNC] = { + .journal = "CODE_FUNC", // standard journald field + .logfmt = NULL, + }, + [NDF_TID] = { + .journal = "TID", // standard journald field + .logfmt = "tid", + }, + [NDF_THREAD_TAG] = { + .journal = "THREAD_TAG", + .logfmt = "thread", + }, + [NDF_MESSAGE_ID] = { + .journal = "MESSAGE_ID", + .logfmt = "msg_id", + }, + [NDF_MODULE] = { + .journal = "ND_MODULE", + .logfmt = "module", + }, + [NDF_NIDL_NODE] = { + .journal = "ND_NIDL_NODE", + .logfmt = "node", + }, + [NDF_NIDL_INSTANCE] = { + .journal = "ND_NIDL_INSTANCE", + .logfmt = "instance", + }, + [NDF_NIDL_CONTEXT] = { + .journal = "ND_NIDL_CONTEXT", + .logfmt = "context", + }, + [NDF_NIDL_DIMENSION] = { + .journal = "ND_NIDL_DIMENSION", + .logfmt = "dimension", + }, + [NDF_SRC_TRANSPORT] = { + .journal = "ND_SRC_TRANSPORT", + .logfmt = "src_transport", + }, + [NDF_SRC_IP] = { + .journal = "ND_SRC_IP", + .logfmt = "src_ip", + }, + [NDF_SRC_PORT] = { + .journal = "ND_SRC_PORT", + .logfmt = "src_port", + }, + [NDF_SRC_CAPABILITIES] = { + .journal = "ND_SRC_CAPABILITIES", + .logfmt = "src_capabilities", + }, + [NDF_DST_TRANSPORT] = { + .journal = "ND_DST_TRANSPORT", + .logfmt = "dst_transport", + }, + [NDF_DST_IP] = { + .journal = "ND_DST_IP", + .logfmt = "dst_ip", + }, + [NDF_DST_PORT] = { + .journal = "ND_DST_PORT", + .logfmt = "dst_port", + }, + [NDF_DST_CAPABILITIES] = { + .journal = "ND_DST_CAPABILITIES", + .logfmt = "dst_capabilities", + }, + [NDF_REQUEST_METHOD] = { + .journal = "ND_REQUEST_METHOD", + .logfmt = "req_method", + }, + [NDF_RESPONSE_CODE] = { + .journal = "ND_RESPONSE_CODE", + .logfmt = "code", + }, + [NDF_CONNECTION_ID] = { + .journal = "ND_CONNECTION_ID", + .logfmt = "conn", + }, + [NDF_TRANSACTION_ID] = { + .journal = "ND_TRANSACTION_ID", + .logfmt = "transaction", + }, + [NDF_RESPONSE_SENT_BYTES] = { + .journal = "ND_RESPONSE_SENT_BYTES", + .logfmt = "sent_bytes", + }, + [NDF_RESPONSE_SIZE_BYTES] = { + .journal = "ND_RESPONSE_SIZE_BYTES", + .logfmt = "size_bytes", + }, + [NDF_RESPONSE_PREPARATION_TIME_USEC] = { + .journal = "ND_RESPONSE_PREP_TIME_USEC", + .logfmt = "prep_ut", + }, + [NDF_RESPONSE_SENT_TIME_USEC] = { + .journal = "ND_RESPONSE_SENT_TIME_USEC", + .logfmt = "sent_ut", + }, + [NDF_RESPONSE_TOTAL_TIME_USEC] = { + .journal = "ND_RESPONSE_TOTAL_TIME_USEC", + .logfmt = "total_ut", + }, + [NDF_ALERT_ID] = { + .journal = "ND_ALERT_ID", + .logfmt = "alert_id", + }, + [NDF_ALERT_UNIQUE_ID] = { + .journal = "ND_ALERT_UNIQUE_ID", + .logfmt = "alert_unique_id", + }, + [NDF_ALERT_TRANSITION_ID] = { + .journal = "ND_ALERT_TRANSITION_ID", + .logfmt = "alert_transition_id", + }, + [NDF_ALERT_EVENT_ID] = { + .journal = "ND_ALERT_EVENT_ID", + .logfmt = "alert_event_id", + }, + [NDF_ALERT_CONFIG_HASH] = { + .journal = "ND_ALERT_CONFIG", + .logfmt = "alert_config", + }, + [NDF_ALERT_NAME] = { + .journal = "ND_ALERT_NAME", + .logfmt = "alert", + }, + [NDF_ALERT_CLASS] = { + .journal = "ND_ALERT_CLASS", + .logfmt = "alert_class", + }, + [NDF_ALERT_COMPONENT] = { + .journal = "ND_ALERT_COMPONENT", + .logfmt = "alert_component", + }, + [NDF_ALERT_TYPE] = { + .journal = "ND_ALERT_TYPE", + .logfmt = "alert_type", + }, + [NDF_ALERT_EXEC] = { + .journal = "ND_ALERT_EXEC", + .logfmt = "alert_exec", + }, + [NDF_ALERT_RECIPIENT] = { + .journal = "ND_ALERT_RECIPIENT", + .logfmt = "alert_recipient", + }, + [NDF_ALERT_VALUE] = { + .journal = "ND_ALERT_VALUE", + .logfmt = "alert_value", + }, + [NDF_ALERT_VALUE_OLD] = { + .journal = "ND_ALERT_VALUE_OLD", + .logfmt = "alert_value_old", + }, + [NDF_ALERT_STATUS] = { + .journal = "ND_ALERT_STATUS", + .logfmt = "alert_status", + }, + [NDF_ALERT_STATUS_OLD] = { + .journal = "ND_ALERT_STATUS_OLD", + .logfmt = "alert_value_old", + }, + [NDF_ALERT_UNITS] = { + .journal = "ND_ALERT_UNITS", + .logfmt = "alert_units", + }, + [NDF_ALERT_SUMMARY] = { + .journal = "ND_ALERT_SUMMARY", + .logfmt = "alert_summary", + }, + [NDF_ALERT_INFO] = { + .journal = "ND_ALERT_INFO", + .logfmt = "alert_info", + }, + [NDF_ALERT_DURATION] = { + .journal = "ND_ALERT_DURATION", + .logfmt = "alert_duration", + }, + [NDF_ALERT_NOTIFICATION_REALTIME_USEC] = { + .journal = "ND_ALERT_NOTIFICATION_TIMESTAMP_USEC", + .logfmt = "alert_notification_timestamp", + .logfmt_annotator = timestamp_usec_annotator, + }, + + // put new items here + // leave the request URL and the message last + + [NDF_REQUEST] = { + .journal = "ND_REQUEST", + .logfmt = "request", + }, + [NDF_MESSAGE] = { + .journal = "MESSAGE", + .logfmt = "msg", + }, +}; + +#define THREAD_FIELDS_MAX (sizeof(thread_log_fields) / sizeof(thread_log_fields[0])) + +ND_LOG_FIELD_ID nd_log_field_id_by_name(const char *field, size_t len) { + for(size_t i = 0; i < THREAD_FIELDS_MAX ;i++) { + if(thread_log_fields[i].journal && strlen(thread_log_fields[i].journal) == len && strncmp(field, thread_log_fields[i].journal, len) == 0) + return i; + } + + return NDF_STOP; +} + +void log_stack_pop(void *ptr) { + if(!ptr) return; + + struct log_stack_entry *lgs = *(struct log_stack_entry (*)[])ptr; + + if(unlikely(!thread_log_stack_next || lgs != thread_log_stack_base[thread_log_stack_next - 1])) { + fatal("You cannot pop in the middle of the stack, or an item not in the stack"); + return; + } + + thread_log_stack_next--; +} + +void log_stack_push(struct log_stack_entry *lgs) { + if(!lgs || thread_log_stack_next >= THREAD_LOG_STACK_MAX) return; + thread_log_stack_base[thread_log_stack_next++] = lgs; +} + +// ---------------------------------------------------------------------------- +// json formatter + +static void nd_logger_json(BUFFER *wb, struct log_field *fields, size_t fields_max) { + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + buffer_json_initialize(wb, "\"", "\"", 0, true, BUFFER_JSON_OPTIONS_MINIFY); + CLEAN_BUFFER *tmp = NULL; + + for (size_t i = 0; i < fields_max; i++) { + if (!fields[i].entry.set || !fields[i].logfmt) + continue; + + const char *key = fields[i].logfmt; + + const char *s = NULL; + switch(fields[i].entry.type) { + case NDFT_TXT: + s = fields[i].entry.txt; + break; + case NDFT_STR: + s = string2str(fields[i].entry.str); + break; + case NDFT_BFR: + s = buffer_tostring(fields[i].entry.bfr); + break; + case NDFT_U64: + buffer_json_member_add_uint64(wb, key, fields[i].entry.u64); + break; + case NDFT_I64: + buffer_json_member_add_int64(wb, key, fields[i].entry.i64); + break; + case NDFT_DBL: + buffer_json_member_add_double(wb, key, fields[i].entry.dbl); + break; + case NDFT_UUID:{ + char u[UUID_COMPACT_STR_LEN]; + uuid_unparse_lower_compact(*fields[i].entry.uuid, u); + buffer_json_member_add_string(wb, key, u); + } + break; + case NDFT_CALLBACK: { + if(!tmp) + tmp = buffer_create(1024, NULL); + else + buffer_flush(tmp); + if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) + s = buffer_tostring(tmp); + else + s = NULL; + } + break; + default: + s = "UNHANDLED"; + break; + } + + if(s && *s) + buffer_json_member_add_string(wb, key, s); + } + + buffer_json_finalize(wb); +} + +// ---------------------------------------------------------------------------- +// logfmt formatter + + +static int64_t log_field_to_int64(struct log_field *lf) { + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + CLEAN_BUFFER *tmp = NULL; + const char *s = NULL; + + switch(lf->entry.type) { + case NDFT_UUID: + case NDFT_UNSET: + return 0; + + case NDFT_TXT: + s = lf->entry.txt; + break; + + case NDFT_STR: + s = string2str(lf->entry.str); + break; + + case NDFT_BFR: + s = buffer_tostring(lf->entry.bfr); + break; + + case NDFT_CALLBACK: + if(!tmp) + tmp = buffer_create(0, NULL); + else + buffer_flush(tmp); + + if(lf->entry.cb.formatter(tmp, lf->entry.cb.formatter_data)) + s = buffer_tostring(tmp); + else + s = NULL; + break; + + case NDFT_U64: + return lf->entry.u64; + + case NDFT_I64: + return lf->entry.i64; + + case NDFT_DBL: + return lf->entry.dbl; + } + + if(s && *s) + return str2ll(s, NULL); + + return 0; +} + +static uint64_t log_field_to_uint64(struct log_field *lf) { + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + CLEAN_BUFFER *tmp = NULL; + const char *s = NULL; + + switch(lf->entry.type) { + case NDFT_UUID: + case NDFT_UNSET: + return 0; + + case NDFT_TXT: + s = lf->entry.txt; + break; + + case NDFT_STR: + s = string2str(lf->entry.str); + break; + + case NDFT_BFR: + s = buffer_tostring(lf->entry.bfr); + break; + + case NDFT_CALLBACK: + if(!tmp) + tmp = buffer_create(0, NULL); + else + buffer_flush(tmp); + + if(lf->entry.cb.formatter(tmp, lf->entry.cb.formatter_data)) + s = buffer_tostring(tmp); + else + s = NULL; + break; + + case NDFT_U64: + return lf->entry.u64; + + case NDFT_I64: + return lf->entry.i64; + + case NDFT_DBL: + return lf->entry.dbl; + } + + if(s && *s) + return str2uint64_t(s, NULL); + + return 0; +} + +static void timestamp_usec_annotator(BUFFER *wb, const char *key, struct log_field *lf) { + usec_t ut = log_field_to_uint64(lf); + + if(!ut) + return; + + char datetime[RFC3339_MAX_LENGTH]; + rfc3339_datetime_ut(datetime, sizeof(datetime), ut, 3, false); + + if(buffer_strlen(wb)) + buffer_fast_strcat(wb, " ", 1); + + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_json_strcat(wb, datetime); +} + +static void errno_annotator(BUFFER *wb, const char *key, struct log_field *lf) { + int64_t errnum = log_field_to_int64(lf); + + if(errnum == 0) + return; + + char buf[1024]; + const char *s = errno2str(errnum, buf, sizeof(buf)); + + if(buffer_strlen(wb)) + buffer_fast_strcat(wb, " ", 1); + + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=\"", 2); + buffer_print_int64(wb, errnum); + buffer_fast_strcat(wb, ", ", 2); + buffer_json_strcat(wb, s); + buffer_fast_strcat(wb, "\"", 1); +} + +static void priority_annotator(BUFFER *wb, const char *key, struct log_field *lf) { + uint64_t pri = log_field_to_uint64(lf); + + if(buffer_strlen(wb)) + buffer_fast_strcat(wb, " ", 1); + + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_strcat(wb, nd_log_id2priority(pri)); +} + +static bool needs_quotes_for_logfmt(const char *s) { + static bool safe_for_logfmt[256] = { + [' '] = true, ['!'] = true, ['"'] = false, ['#'] = true, ['$'] = true, ['%'] = true, ['&'] = true, + ['\''] = true, ['('] = true, [')'] = true, ['*'] = true, ['+'] = true, [','] = true, ['-'] = true, + ['.'] = true, ['/'] = true, ['0'] = true, ['1'] = true, ['2'] = true, ['3'] = true, ['4'] = true, + ['5'] = true, ['6'] = true, ['7'] = true, ['8'] = true, ['9'] = true, [':'] = true, [';'] = true, + ['<'] = true, ['='] = true, ['>'] = true, ['?'] = true, ['@'] = true, ['A'] = true, ['B'] = true, + ['C'] = true, ['D'] = true, ['E'] = true, ['F'] = true, ['G'] = true, ['H'] = true, ['I'] = true, + ['J'] = true, ['K'] = true, ['L'] = true, ['M'] = true, ['N'] = true, ['O'] = true, ['P'] = true, + ['Q'] = true, ['R'] = true, ['S'] = true, ['T'] = true, ['U'] = true, ['V'] = true, ['W'] = true, + ['X'] = true, ['Y'] = true, ['Z'] = true, ['['] = true, ['\\'] = false, [']'] = true, ['^'] = true, + ['_'] = true, ['`'] = true, ['a'] = true, ['b'] = true, ['c'] = true, ['d'] = true, ['e'] = true, + ['f'] = true, ['g'] = true, ['h'] = true, ['i'] = true, ['j'] = true, ['k'] = true, ['l'] = true, + ['m'] = true, ['n'] = true, ['o'] = true, ['p'] = true, ['q'] = true, ['r'] = true, ['s'] = true, + ['t'] = true, ['u'] = true, ['v'] = true, ['w'] = true, ['x'] = true, ['y'] = true, ['z'] = true, + ['{'] = true, ['|'] = true, ['}'] = true, ['~'] = true, [0x7f] = true, + }; + + if(!*s) + return true; + + while(*s) { + if(*s == '=' || isspace(*s) || !safe_for_logfmt[(uint8_t)*s]) + return true; + + s++; + } + + return false; +} + +static void string_to_logfmt(BUFFER *wb, const char *s) { + bool spaces = needs_quotes_for_logfmt(s); + + if(spaces) + buffer_fast_strcat(wb, "\"", 1); + + buffer_json_strcat(wb, s); + + if(spaces) + buffer_fast_strcat(wb, "\"", 1); +} + +static void nd_logger_logfmt(BUFFER *wb, struct log_field *fields, size_t fields_max) { + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + CLEAN_BUFFER *tmp = NULL; + + for (size_t i = 0; i < fields_max; i++) { + if (!fields[i].entry.set || !fields[i].logfmt) + continue; + + const char *key = fields[i].logfmt; + + if(fields[i].logfmt_annotator) + fields[i].logfmt_annotator(wb, key, &fields[i]); + else { + if(buffer_strlen(wb)) + buffer_fast_strcat(wb, " ", 1); + + switch(fields[i].entry.type) { + case NDFT_TXT: + if(*fields[i].entry.txt) { + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + string_to_logfmt(wb, fields[i].entry.txt); + } + break; + case NDFT_STR: + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + string_to_logfmt(wb, string2str(fields[i].entry.str)); + break; + case NDFT_BFR: + if(buffer_strlen(fields[i].entry.bfr)) { + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + string_to_logfmt(wb, buffer_tostring(fields[i].entry.bfr)); + } + break; + case NDFT_U64: + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_print_uint64(wb, fields[i].entry.u64); + break; + case NDFT_I64: + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_print_int64(wb, fields[i].entry.i64); + break; + case NDFT_DBL: + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_print_netdata_double(wb, fields[i].entry.dbl); + break; + case NDFT_UUID: { + char u[UUID_COMPACT_STR_LEN]; + uuid_unparse_lower_compact(*fields[i].entry.uuid, u); + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + buffer_fast_strcat(wb, u, sizeof(u) - 1); + } + break; + case NDFT_CALLBACK: { + if(!tmp) + tmp = buffer_create(1024, NULL); + else + buffer_flush(tmp); + if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) { + buffer_strcat(wb, key); + buffer_fast_strcat(wb, "=", 1); + string_to_logfmt(wb, buffer_tostring(tmp)); + } + } + break; + default: + buffer_strcat(wb, "UNHANDLED"); + break; + } + } + } +} + +// ---------------------------------------------------------------------------- +// journal logger + +bool nd_log_journal_socket_available(void) { + if(netdata_configured_host_prefix && *netdata_configured_host_prefix) { + char filename[FILENAME_MAX + 1]; + + snprintfz(filename, sizeof(filename), "%s%s", + netdata_configured_host_prefix, "/run/systemd/journal/socket"); + + if(is_path_unix_socket(filename)) + return true; + } + + return is_path_unix_socket("/run/systemd/journal/socket"); +} + +static bool nd_logger_journal_libsystemd(struct log_field *fields, size_t fields_max) { +#ifdef HAVE_SYSTEMD + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + struct iovec iov[fields_max]; + int iov_count = 0; + + memset(iov, 0, sizeof(iov)); + + CLEAN_BUFFER *tmp = NULL; + + for (size_t i = 0; i < fields_max; i++) { + if (!fields[i].entry.set || !fields[i].journal) + continue; + + const char *key = fields[i].journal; + char *value = NULL; + switch (fields[i].entry.type) { + case NDFT_TXT: + if(*fields[i].entry.txt) + asprintf(&value, "%s=%s", key, fields[i].entry.txt); + break; + case NDFT_STR: + asprintf(&value, "%s=%s", key, string2str(fields[i].entry.str)); + break; + case NDFT_BFR: + if(buffer_strlen(fields[i].entry.bfr)) + asprintf(&value, "%s=%s", key, buffer_tostring(fields[i].entry.bfr)); + break; + case NDFT_U64: + asprintf(&value, "%s=%" PRIu64, key, fields[i].entry.u64); + break; + case NDFT_I64: + asprintf(&value, "%s=%" PRId64, key, fields[i].entry.i64); + break; + case NDFT_DBL: + asprintf(&value, "%s=%f", key, fields[i].entry.dbl); + break; + case NDFT_UUID: { + char u[UUID_COMPACT_STR_LEN]; + uuid_unparse_lower_compact(*fields[i].entry.uuid, u); + asprintf(&value, "%s=%s", key, u); + } + break; + case NDFT_CALLBACK: { + if(!tmp) + tmp = buffer_create(1024, NULL); + else + buffer_flush(tmp); + if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) + asprintf(&value, "%s=%s", key, buffer_tostring(tmp)); + } + break; + default: + asprintf(&value, "%s=%s", key, "UNHANDLED"); + break; + } + + if (value) { + iov[iov_count].iov_base = value; + iov[iov_count].iov_len = strlen(value); + iov_count++; + } + } + + int r = sd_journal_sendv(iov, iov_count); + + // Clean up allocated memory + for (int i = 0; i < iov_count; i++) { + if (iov[i].iov_base != NULL) { + free(iov[i].iov_base); + } + } + + return r == 0; +#else + return false; +#endif +} + +static bool nd_logger_journal_direct(struct log_field *fields, size_t fields_max) { + if(!nd_log.journal_direct.initialized) + return false; + + // --- FIELD_PARSER_VERSIONS --- + // + // IMPORTANT: + // THERE ARE 6 VERSIONS OF THIS CODE + // + // 1. journal (direct socket API), + // 2. journal (libsystemd API), + // 3. logfmt, + // 4. json, + // 5. convert to uint64 + // 6. convert to int64 + // + // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES + + CLEAN_BUFFER *wb = buffer_create(4096, NULL); + CLEAN_BUFFER *tmp = NULL; + + for (size_t i = 0; i < fields_max; i++) { + if (!fields[i].entry.set || !fields[i].journal) + continue; + + const char *key = fields[i].journal; + + const char *s = NULL; + switch(fields[i].entry.type) { + case NDFT_TXT: + s = fields[i].entry.txt; + break; + case NDFT_STR: + s = string2str(fields[i].entry.str); + break; + case NDFT_BFR: + s = buffer_tostring(fields[i].entry.bfr); + break; + case NDFT_U64: + buffer_strcat(wb, key); + buffer_putc(wb, '='); + buffer_print_uint64(wb, fields[i].entry.u64); + buffer_putc(wb, '\n'); + break; + case NDFT_I64: + buffer_strcat(wb, key); + buffer_putc(wb, '='); + buffer_print_int64(wb, fields[i].entry.i64); + buffer_putc(wb, '\n'); + break; + case NDFT_DBL: + buffer_strcat(wb, key); + buffer_putc(wb, '='); + buffer_print_netdata_double(wb, fields[i].entry.dbl); + buffer_putc(wb, '\n'); + break; + case NDFT_UUID:{ + char u[UUID_COMPACT_STR_LEN]; + uuid_unparse_lower_compact(*fields[i].entry.uuid, u); + buffer_strcat(wb, key); + buffer_putc(wb, '='); + buffer_fast_strcat(wb, u, sizeof(u) - 1); + buffer_putc(wb, '\n'); + } + break; + case NDFT_CALLBACK: { + if(!tmp) + tmp = buffer_create(1024, NULL); + else + buffer_flush(tmp); + if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) + s = buffer_tostring(tmp); + else + s = NULL; + } + break; + default: + s = "UNHANDLED"; + break; + } + + if(s && *s) { + buffer_strcat(wb, key); + if(!strchr(s, '\n')) { + buffer_putc(wb, '='); + buffer_strcat(wb, s); + buffer_putc(wb, '\n'); + } + else { + buffer_putc(wb, '\n'); + size_t size = strlen(s); + uint64_t le_size = htole64(size); + buffer_memcat(wb, &le_size, sizeof(le_size)); + buffer_memcat(wb, s, size); + buffer_putc(wb, '\n'); + } + } + } + + return journal_direct_send(nd_log.journal_direct.fd, buffer_tostring(wb), buffer_strlen(wb)); +} + +// ---------------------------------------------------------------------------- +// syslog logger - uses logfmt + +static bool nd_logger_syslog(int priority, ND_LOG_FORMAT format, struct log_field *fields, size_t fields_max) { + CLEAN_BUFFER *wb = buffer_create(1024, NULL); + + nd_logger_logfmt(wb, fields, fields_max); + syslog(priority, "%s", buffer_tostring(wb)); + + return true; +} + +// ---------------------------------------------------------------------------- +// file logger - uses logfmt + +static bool nd_logger_file(FILE *fp, ND_LOG_FORMAT format, struct log_field *fields, size_t fields_max) { + BUFFER *wb = buffer_create(1024, NULL); + + if(format == NDLF_JSON) + nd_logger_json(wb, fields, fields_max); + else + nd_logger_logfmt(wb, fields, fields_max); + + int r = fprintf(fp, "%s\n", buffer_tostring(wb)); + fflush(fp); + + buffer_free(wb); + return r > 0; +} + +// ---------------------------------------------------------------------------- +// logger router + +static ND_LOG_METHOD nd_logger_select_output(ND_LOG_SOURCES source, FILE **fpp, SPINLOCK **spinlock) { + *spinlock = NULL; + ND_LOG_METHOD output = nd_log.sources[source].method; + + switch(output) { + case NDLM_JOURNAL: + if(unlikely(!nd_log.journal_direct.initialized && !nd_log.journal.initialized)) { + output = NDLM_FILE; + *fpp = stderr; + *spinlock = &nd_log.std_error.spinlock; + } + else { + *fpp = NULL; + *spinlock = NULL; + } + break; + + case NDLM_SYSLOG: + if(unlikely(!nd_log.syslog.initialized)) { + output = NDLM_FILE; + *spinlock = &nd_log.std_error.spinlock; + *fpp = stderr; + } + else { + *spinlock = NULL; + *fpp = NULL; + } + break; + + case NDLM_FILE: + if(!nd_log.sources[source].fp) { + *fpp = stderr; + *spinlock = &nd_log.std_error.spinlock; + } + else { + *fpp = nd_log.sources[source].fp; + *spinlock = &nd_log.sources[source].spinlock; + } + break; + + case NDLM_STDOUT: + output = NDLM_FILE; + *fpp = stdout; + *spinlock = &nd_log.std_output.spinlock; + break; + + default: + case NDLM_DEFAULT: + case NDLM_STDERR: + output = NDLM_FILE; + *fpp = stderr; + *spinlock = &nd_log.std_error.spinlock; + break; + + case NDLM_DISABLED: + case NDLM_DEVNULL: + output = NDLM_DISABLED; + *fpp = NULL; + *spinlock = NULL; + break; + } + + return output; +} + +// ---------------------------------------------------------------------------- +// high level logger + +static void nd_logger_log_fields(SPINLOCK *spinlock, FILE *fp, bool limit, ND_LOG_FIELD_PRIORITY priority, + ND_LOG_METHOD output, struct nd_log_source *source, + struct log_field *fields, size_t fields_max) { + if(spinlock) + spinlock_lock(spinlock); + + // check the limits + if(limit && nd_log_limit_reached(source)) + goto cleanup; + + if(output == NDLM_JOURNAL) { + if(!nd_logger_journal_direct(fields, fields_max) && !nd_logger_journal_libsystemd(fields, fields_max)) { + // we can't log to journal, let's log to stderr + if(spinlock) + spinlock_unlock(spinlock); + + output = NDLM_FILE; + spinlock = &nd_log.std_error.spinlock; + fp = stderr; + + if(spinlock) + spinlock_lock(spinlock); + } + } + + if(output == NDLM_SYSLOG) + nd_logger_syslog(priority, source->format, fields, fields_max); + + if(output == NDLM_FILE) + nd_logger_file(fp, source->format, fields, fields_max); + + +cleanup: + if(spinlock) + spinlock_unlock(spinlock); +} + +static void nd_logger_unset_all_thread_fields(void) { + size_t fields_max = THREAD_FIELDS_MAX; + for(size_t i = 0; i < fields_max ; i++) + thread_log_fields[i].entry.set = false; +} + +static void nd_logger_merge_log_stack_to_thread_fields(void) { + for(size_t c = 0; c < thread_log_stack_next ;c++) { + struct log_stack_entry *lgs = thread_log_stack_base[c]; + + for(size_t i = 0; lgs[i].id != NDF_STOP ; i++) { + if(lgs[i].id >= _NDF_MAX || !lgs[i].set) + continue; + + struct log_stack_entry *e = &lgs[i]; + ND_LOG_STACK_FIELD_TYPE type = lgs[i].type; + + // do not add empty / unset fields + if((type == NDFT_TXT && (!e->txt || !*e->txt)) || + (type == NDFT_BFR && (!e->bfr || !buffer_strlen(e->bfr))) || + (type == NDFT_STR && !e->str) || + (type == NDFT_UUID && !e->uuid) || + (type == NDFT_CALLBACK && !e->cb.formatter) || + type == NDFT_UNSET) + continue; + + thread_log_fields[lgs[i].id].entry = *e; + } + } +} + +static void nd_logger(const char *file, const char *function, const unsigned long line, + ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, bool limit, int saved_errno, + const char *fmt, va_list ap) { + + SPINLOCK *spinlock; + FILE *fp; + ND_LOG_METHOD output = nd_logger_select_output(source, &fp, &spinlock); + if(output != NDLM_FILE && output != NDLM_JOURNAL && output != NDLM_SYSLOG) + return; + + // mark all fields as unset + nd_logger_unset_all_thread_fields(); + + // flatten the log stack into the fields + nd_logger_merge_log_stack_to_thread_fields(); + + // set the common fields that are automatically set by the logging subsystem + + if(likely(!thread_log_fields[NDF_INVOCATION_ID].entry.set)) + thread_log_fields[NDF_INVOCATION_ID].entry = ND_LOG_FIELD_UUID(NDF_INVOCATION_ID, &nd_log.invocation_id); + + if(likely(!thread_log_fields[NDF_LOG_SOURCE].entry.set)) + thread_log_fields[NDF_LOG_SOURCE].entry = ND_LOG_FIELD_TXT(NDF_LOG_SOURCE, nd_log_id2source(source)); + else { + ND_LOG_SOURCES src = source; + + if(thread_log_fields[NDF_LOG_SOURCE].entry.type == NDFT_TXT) + src = nd_log_source2id(thread_log_fields[NDF_LOG_SOURCE].entry.txt, source); + else if(thread_log_fields[NDF_LOG_SOURCE].entry.type == NDFT_U64) + src = thread_log_fields[NDF_LOG_SOURCE].entry.u64; + + if(src != source && src >= 0 && src < _NDLS_MAX) { + source = src; + output = nd_logger_select_output(source, &fp, &spinlock); + if(output != NDLM_FILE && output != NDLM_JOURNAL && output != NDLM_SYSLOG) + return; + } + } + + if(likely(!thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry.set)) + thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry = ND_LOG_FIELD_TXT(NDF_SYSLOG_IDENTIFIER, program_name); + + if(likely(!thread_log_fields[NDF_LINE].entry.set)) { + thread_log_fields[NDF_LINE].entry = ND_LOG_FIELD_U64(NDF_LINE, line); + thread_log_fields[NDF_FILE].entry = ND_LOG_FIELD_TXT(NDF_FILE, file); + thread_log_fields[NDF_FUNC].entry = ND_LOG_FIELD_TXT(NDF_FUNC, function); + } + + if(likely(!thread_log_fields[NDF_PRIORITY].entry.set)) { + thread_log_fields[NDF_PRIORITY].entry = ND_LOG_FIELD_U64(NDF_PRIORITY, priority); + } + + if(likely(!thread_log_fields[NDF_TID].entry.set)) + thread_log_fields[NDF_TID].entry = ND_LOG_FIELD_U64(NDF_TID, gettid()); + + char os_threadname[NETDATA_THREAD_NAME_MAX + 1]; + if(likely(!thread_log_fields[NDF_THREAD_TAG].entry.set)) { + const char *thread_tag = netdata_thread_tag(); + if(!netdata_thread_tag_exists()) { + if (!netdata_thread_tag_exists()) { + os_thread_get_current_name_np(os_threadname); + if ('\0' != os_threadname[0]) + /* If it is not an empty string replace "MAIN" thread_tag */ + thread_tag = os_threadname; + } + } + thread_log_fields[NDF_THREAD_TAG].entry = ND_LOG_FIELD_TXT(NDF_THREAD_TAG, thread_tag); + + // TODO: fix the ND_MODULE in logging by setting proper module name in threads +// if(!thread_log_fields[NDF_MODULE].entry.set) +// thread_log_fields[NDF_MODULE].entry = ND_LOG_FIELD_CB(NDF_MODULE, thread_tag_to_module, (void *)thread_tag); + } + + if(likely(!thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry.set)) + thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry = ND_LOG_FIELD_U64(NDF_TIMESTAMP_REALTIME_USEC, now_realtime_usec()); + + if(saved_errno != 0 && !thread_log_fields[NDF_ERRNO].entry.set) + thread_log_fields[NDF_ERRNO].entry = ND_LOG_FIELD_I64(NDF_ERRNO, saved_errno); + + CLEAN_BUFFER *wb = NULL; + if(fmt && !thread_log_fields[NDF_MESSAGE].entry.set) { + wb = buffer_create(1024, NULL); + buffer_vsprintf(wb, fmt, ap); + thread_log_fields[NDF_MESSAGE].entry = ND_LOG_FIELD_TXT(NDF_MESSAGE, buffer_tostring(wb)); + } + + nd_logger_log_fields(spinlock, fp, limit, priority, output, &nd_log.sources[source], + thread_log_fields, THREAD_FIELDS_MAX); + + if(nd_log.sources[source].pending_msg) { + // log a pending message + + nd_logger_unset_all_thread_fields(); + + thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry = (struct log_stack_entry){ + .set = true, + .type = NDFT_U64, + .u64 = now_realtime_usec(), + }; + + thread_log_fields[NDF_LOG_SOURCE].entry = (struct log_stack_entry){ + .set = true, + .type = NDFT_TXT, + .txt = nd_log_id2source(source), + }; + + thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry = (struct log_stack_entry){ + .set = true, + .type = NDFT_TXT, + .txt = program_name, + }; + + thread_log_fields[NDF_MESSAGE].entry = (struct log_stack_entry){ + .set = true, + .type = NDFT_TXT, + .txt = nd_log.sources[source].pending_msg, + }; + + nd_logger_log_fields(spinlock, fp, false, priority, output, + &nd_log.sources[source], + thread_log_fields, THREAD_FIELDS_MAX); + + freez((void *)nd_log.sources[source].pending_msg); + nd_log.sources[source].pending_msg = NULL; + } + + errno = 0; +} + +static ND_LOG_SOURCES nd_log_validate_source(ND_LOG_SOURCES source) { + if(source >= _NDLS_MAX) + source = NDLS_DAEMON; + + if(overwrite_thread_source) + source = overwrite_thread_source; + + if(nd_log.overwrite_process_source) + source = nd_log.overwrite_process_source; + + return source; +} + +// ---------------------------------------------------------------------------- +// public API for loggers + +void netdata_logger(ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, const char *file, const char *function, unsigned long line, const char *fmt, ... ) { + int saved_errno = errno; + source = nd_log_validate_source(source); + + if (source != NDLS_DEBUG && priority > nd_log.sources[source].min_priority) + return; + + va_list args; + va_start(args, fmt); + nd_logger(file, function, line, source, priority, + source == NDLS_DAEMON || source == NDLS_COLLECTORS, + saved_errno, fmt, args); + va_end(args); +} + +void netdata_logger_with_limit(ERROR_LIMIT *erl, ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, const char *fmt, ... ) { + int saved_errno = errno; + source = nd_log_validate_source(source); + + if (source != NDLS_DEBUG && priority > nd_log.sources[source].min_priority) + return; + + if(erl->sleep_ut) + sleep_usec(erl->sleep_ut); + + spinlock_lock(&erl->spinlock); + + erl->count++; + time_t now = now_boottime_sec(); + if(now - erl->last_logged < erl->log_every) { + spinlock_unlock(&erl->spinlock); + return; + } + + spinlock_unlock(&erl->spinlock); + + va_list args; + va_start(args, fmt); + nd_logger(file, function, line, source, priority, + source == NDLS_DAEMON || source == NDLS_COLLECTORS, + saved_errno, fmt, args); + va_end(args); + erl->last_logged = now; + erl->count = 0; +} + +void netdata_logger_fatal( const char *file, const char *function, const unsigned long line, const char *fmt, ... ) { + int saved_errno = errno; + ND_LOG_SOURCES source = NDLS_DAEMON; + source = nd_log_validate_source(source); + + va_list args; + va_start(args, fmt); + nd_logger(file, function, line, source, NDLP_ALERT, true, saved_errno, fmt, args); + va_end(args); + + char date[LOG_DATE_LENGTH]; + log_date(date, LOG_DATE_LENGTH, now_realtime_sec()); + + char action_data[70+1]; + snprintfz(action_data, 70, "%04lu@%-10.10s:%-15.15s/%d", line, file, function, saved_errno); + char action_result[60+1]; + + char os_threadname[NETDATA_THREAD_NAME_MAX + 1]; + const char *thread_tag = netdata_thread_tag(); + if(!netdata_thread_tag_exists()) { + if (!netdata_thread_tag_exists()) { + os_thread_get_current_name_np(os_threadname); + if ('\0' != os_threadname[0]) + /* If it is not an empty string replace "MAIN" thread_tag */ + thread_tag = os_threadname; + } + } + if(!thread_tag) + thread_tag = "UNKNOWN"; + + const char *tag_to_send = thread_tag; + + // anonymize thread names + if(strncmp(thread_tag, THREAD_TAG_STREAM_RECEIVER, strlen(THREAD_TAG_STREAM_RECEIVER)) == 0) + tag_to_send = THREAD_TAG_STREAM_RECEIVER; + if(strncmp(thread_tag, THREAD_TAG_STREAM_SENDER, strlen(THREAD_TAG_STREAM_SENDER)) == 0) + tag_to_send = THREAD_TAG_STREAM_SENDER; + + snprintfz(action_result, 60, "%s:%s", program_name, tag_to_send); + send_statistics("FATAL", action_result, action_data); + +#ifdef HAVE_BACKTRACE + int fd = nd_log.sources[NDLS_DAEMON].fd; + if(fd == -1) + fd = STDERR_FILENO; + + int nptrs; + void *buffer[10000]; + + nptrs = backtrace(buffer, sizeof(buffer)); + if(nptrs) + backtrace_symbols_fd(buffer, nptrs, fd); +#endif + +#ifdef NETDATA_INTERNAL_CHECKS + abort(); +#endif + + netdata_cleanup_and_exit(1); +} + +// ---------------------------------------------------------------------------- +// log limits + +void nd_log_limits_reset(void) { + usec_t now_ut = now_monotonic_usec(); + + spinlock_lock(&nd_log.std_output.spinlock); + spinlock_lock(&nd_log.std_error.spinlock); + + for(size_t i = 0; i < _NDLS_MAX ;i++) { + spinlock_lock(&nd_log.sources[i].spinlock); + nd_log.sources[i].limits.prevented = 0; + nd_log.sources[i].limits.counter = 0; + nd_log.sources[i].limits.started_monotonic_ut = now_ut; + nd_log.sources[i].limits.logs_per_period = nd_log.sources[i].limits.logs_per_period_backup; + spinlock_unlock(&nd_log.sources[i].spinlock); + } + + spinlock_unlock(&nd_log.std_output.spinlock); + spinlock_unlock(&nd_log.std_error.spinlock); +} + +void nd_log_limits_unlimited(void) { + nd_log_limits_reset(); + for(size_t i = 0; i < _NDLS_MAX ;i++) { + nd_log.sources[i].limits.logs_per_period = 0; + } +} + +static bool nd_log_limit_reached(struct nd_log_source *source) { + if(source->limits.throttle_period == 0 || source->limits.logs_per_period == 0) + return false; + + usec_t now_ut = now_monotonic_usec(); + if(!source->limits.started_monotonic_ut) + source->limits.started_monotonic_ut = now_ut; + + source->limits.counter++; + + if(now_ut - source->limits.started_monotonic_ut > (usec_t)source->limits.throttle_period) { + if(source->limits.prevented) { + BUFFER *wb = buffer_create(1024, NULL); + buffer_sprintf(wb, + "LOG FLOOD PROTECTION: resuming logging " + "(prevented %"PRIu32" logs in the last %"PRIu32" seconds).", + source->limits.prevented, + source->limits.throttle_period); + + if(source->pending_msg) + freez((void *)source->pending_msg); + + source->pending_msg = strdupz(buffer_tostring(wb)); + + buffer_free(wb); + } + + // restart the period accounting + source->limits.started_monotonic_ut = now_ut; + source->limits.counter = 1; + source->limits.prevented = 0; + + // log this error + return false; + } + + if(source->limits.counter > source->limits.logs_per_period) { + if(!source->limits.prevented) { + BUFFER *wb = buffer_create(1024, NULL); + buffer_sprintf(wb, + "LOG FLOOD PROTECTION: too many logs (%"PRIu32" logs in %"PRId64" seconds, threshold is set to %"PRIu32" logs " + "in %"PRIu32" seconds). Preventing more logs from process '%s' for %"PRId64" seconds.", + source->limits.counter, + (int64_t)((now_ut - source->limits.started_monotonic_ut) / USEC_PER_SEC), + source->limits.logs_per_period, + source->limits.throttle_period, + program_name, + (int64_t)((source->limits.started_monotonic_ut + (source->limits.throttle_period * USEC_PER_SEC) - now_ut)) / USEC_PER_SEC); + + if(source->pending_msg) + freez((void *)source->pending_msg); + + source->pending_msg = strdupz(buffer_tostring(wb)); + + buffer_free(wb); + } + + source->limits.prevented++; + + // prevent logging this error +#ifdef NETDATA_INTERNAL_CHECKS + return false; +#else + return true; +#endif + } + + return false; +} |