void *pluginsd_worker_thread(void *arg) { struct plugind *cd = (struct plugind *)arg; char line[PLUGINSD_LINE_MAX + 1]; #ifdef DETACH_PLUGINS_FROM_NETDATA unsigned long long usec = 0, susec = 0; struct timeval last = {0, 0} , now = {0, 0}; #endif char *words[MAX_WORDS] = { NULL }; uint32_t SET_HASH = simple_hash("SET"); uint32_t BEGIN_HASH = simple_hash("BEGIN"); uint32_t END_HASH = simple_hash("END"); uint32_t FLUSH_HASH = simple_hash("FLUSH"); uint32_t CHART_HASH = simple_hash("CHART"); uint32_t DIMENSION_HASH = simple_hash("DIMENSION"); uint32_t DISABLE_HASH = simple_hash("DISABLE"); #ifdef DETACH_PLUGINS_FROM_NETDATA uint32_t MYPID_HASH = simple_hash("MYPID"); uint32_t STOPPING_WAKE_ME_UP_PLEASE_HASH = simple_hash("STOPPING_WAKE_ME_UP_PLEASE"); #endif while(likely(1)) { if(unlikely(netdata_exit)) break; FILE *fp = mypopen(cd->cmd, &cd->pid); if(unlikely(!fp)) { error("Cannot popen(\"%s\", \"r\").", cd->cmd); break; } info("PLUGINSD: '%s' running on pid %d", cd->fullfilename, cd->pid); RRDSET *st = NULL; unsigned long long count = 0; char *s; uint32_t hash; while(likely(fgets(line, PLUGINSD_LINE_MAX, fp) != NULL)) { if(unlikely(netdata_exit)) break; line[PLUGINSD_LINE_MAX] = '\0'; // debug(D_PLUGINSD, "PLUGINSD: %s: %s", cd->filename, line); int w = pluginsd_split_words(line, words, MAX_WORDS); s = words[0]; if(unlikely(!s || !*s || !w)) { // debug(D_PLUGINSD, "PLUGINSD: empty line"); continue; } // debug(D_PLUGINSD, "PLUGINSD: words 0='%s' 1='%s' 2='%s' 3='%s' 4='%s' 5='%s' 6='%s' 7='%s' 8='%s' 9='%s'", words[0], words[1], words[2], words[3], words[4], words[5], words[6], words[7], words[8], words[9]); hash = simple_hash(s); if(likely(hash == SET_HASH && !strcmp(s, "SET"))) { char *dimension = words[1]; char *value = words[2]; if(unlikely(!dimension || !*dimension)) { error("PLUGINSD: '%s' is requesting a SET on chart '%s', without a dimension. Disabling it.", cd->fullfilename, st->id); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } if(unlikely(!value || !*value)) value = NULL; if(unlikely(!st)) { error("PLUGINSD: '%s' is requesting a SET on dimension %s with value %s, without a BEGIN. Disabling it.", cd->fullfilename, dimension, value?value:"<nothing>"); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: '%s' is setting dimension %s/%s to %s", cd->fullfilename, st->id, dimension, value?value:"<nothing>"); if(value) rrddim_set(st, dimension, atoll(value)); count++; } else if(likely(hash == BEGIN_HASH && !strcmp(s, "BEGIN"))) { char *id = words[1]; char *microseconds_txt = words[2]; if(unlikely(!id)) { error("PLUGINSD: '%s' is requesting a BEGIN without a chart id. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } st = rrdset_find(id); if(unlikely(!st)) { error("PLUGINSD: '%s' is requesting a BEGIN on chart '%s', which does not exist. Disabling it.", cd->fullfilename, id); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } if(likely(st->counter_done)) { unsigned long long microseconds = 0; if(microseconds_txt && *microseconds_txt) microseconds = strtoull(microseconds_txt, NULL, 10); if(microseconds) rrdset_next_usec(st, microseconds); else rrdset_next_plugins(st); } } else if(likely(hash == END_HASH && !strcmp(s, "END"))) { if(unlikely(!st)) { error("PLUGINSD: '%s' is requesting an END, without a BEGIN. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: '%s' is requesting a END on chart %s", cd->fullfilename, st->id); rrdset_done(st); st = NULL; } else if(likely(hash == FLUSH_HASH && !strcmp(s, "FLUSH"))) { debug(D_PLUGINSD, "PLUGINSD: '%s' is requesting a FLUSH", cd->fullfilename); st = NULL; } else if(likely(hash == CHART_HASH && !strcmp(s, "CHART"))) { int noname = 0; st = NULL; if((words[1]) != NULL && (words[2]) != NULL && strcmp(words[1], words[2]) == 0) noname = 1; char *type = words[1]; char *id = NULL; if(likely(type)) { id = strchr(type, '.'); if(likely(id)) { *id = '\0'; id++; } } char *name = words[2]; char *title = words[3]; char *units = words[4]; char *family = words[5]; char *context = words[6]; char *chart = words[7]; char *priority_s = words[8]; char *update_every_s = words[9]; if(unlikely(!type || !*type || !id || !*id)) { error("PLUGINSD: '%s' is requesting a CHART, without a type.id. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } int priority = 1000; if(likely(priority_s)) priority = atoi(priority_s); int update_every = cd->update_every; if(likely(update_every_s)) update_every = atoi(update_every_s); if(unlikely(!update_every)) update_every = cd->update_every; int chart_type = RRDSET_TYPE_LINE; if(unlikely(chart)) chart_type = rrdset_type_id(chart); if(unlikely(noname || !name || !*name || strcasecmp(name, "NULL") == 0 || strcasecmp(name, "(NULL)") == 0)) name = NULL; if(unlikely(!family || !*family)) family = NULL; if(unlikely(!context || !*context)) context = NULL; st = rrdset_find_bytype(type, id); if(unlikely(!st)) { debug(D_PLUGINSD, "PLUGINSD: Creating chart type='%s', id='%s', name='%s', family='%s', context='%s', chart='%s', priority=%d, update_every=%d" , type, id , name?name:"" , family?family:"" , context?context:"" , rrdset_type_name(chart_type) , priority , update_every ); st = rrdset_create(type, id, name, family, context, title, units, priority, update_every, chart_type); cd->update_every = update_every; } else debug(D_PLUGINSD, "PLUGINSD: Chart '%s' already exists. Not adding it again.", st->id); } else if(likely(hash == DIMENSION_HASH && !strcmp(s, "DIMENSION"))) { char *id = words[1]; char *name = words[2]; char *algorithm = words[3]; char *multiplier_s = words[4]; char *divisor_s = words[5]; char *options = words[6]; if(unlikely(!id || !*id)) { error("PLUGINSD: '%s' is requesting a DIMENSION, without an id. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } if(unlikely(!st)) { error("PLUGINSD: '%s' is requesting a DIMENSION, without a CHART. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } long multiplier = 1; if(multiplier_s && *multiplier_s) multiplier = atol(multiplier_s); if(unlikely(!multiplier)) multiplier = 1; long divisor = 1; if(likely(divisor_s && *divisor_s)) divisor = atol(divisor_s); if(unlikely(!divisor)) divisor = 1; if(unlikely(!algorithm || !*algorithm)) algorithm = "absolute"; if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: Creating dimension in chart %s, id='%s', name='%s', algorithm='%s', multiplier=%ld, divisor=%ld, hidden='%s'" , st->id , id , name?name:"" , rrddim_algorithm_name(rrddim_algorithm_id(algorithm)) , multiplier , divisor , options?options:"" ); RRDDIM *rd = rrddim_find(st, id); if(unlikely(!rd)) { rd = rrddim_add(st, id, name, multiplier, divisor, rrddim_algorithm_id(algorithm)); rd->flags = 0x00000000; if(options && *options) { if(strstr(options, "hidden") != NULL) rd->flags |= RRDDIM_FLAG_HIDDEN; if(strstr(options, "noreset") != NULL) rd->flags |= RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS; if(strstr(options, "nooverflow") != NULL) rd->flags |= RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS; } } else if(unlikely(st->debug)) debug(D_PLUGINSD, "PLUGINSD: dimension %s/%s already exists. Not adding it again.", st->id, id); } else if(unlikely(hash == DISABLE_HASH && !strcmp(s, "DISABLE"))) { error("PLUGINSD: '%s' called DISABLE. Disabling it.", cd->fullfilename); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } #ifdef DETACH_PLUGINS_FROM_NETDATA else if(likely(hash == MYPID_HASH && !strcmp(s, "MYPID"))) { char *pid_s = words[1]; pid_t pid = atol(pid_s); if(likely(pid)) cd->pid = pid; debug(D_PLUGINSD, "PLUGINSD: %s is on pid %d", cd->id, cd->pid); } else if(likely(hash == STOPPING_WAKE_ME_UP_PLEASE_HASH && !strcmp(s, "STOPPING_WAKE_ME_UP_PLEASE"))) { error("PLUGINSD: '%s' (pid %d) called STOPPING_WAKE_ME_UP_PLEASE.", cd->fullfilename, cd->pid); gettimeofday(&now, NULL); if(unlikely(!usec && !susec)) { // our first run susec = cd->rrd_update_every * 1000000ULL; } else { // second+ run usec = usecdiff(&now, &last) - susec; error("PLUGINSD: %s last loop took %llu usec (worked for %llu, sleeped for %llu).\n", cd->fullfilename, usec + susec, usec, susec); if(unlikely(usec < (rrd_update_every * 1000000ULL / 2ULL))) susec = (rrd_update_every * 1000000ULL) - usec; else susec = rrd_update_every * 1000000ULL / 2ULL; } error("PLUGINSD: %s sleeping for %llu. Will kill with SIGCONT pid %d to wake it up.\n", cd->fullfilename, susec, cd->pid); usleep(susec); killpid(cd->pid, SIGCONT); bcopy(&now, &last, sizeof(struct timeval)); break; } #endif else { error("PLUGINSD: '%s' is sending command '%s' which is not known by netdata. Disabling it.", cd->fullfilename, s); cd->enabled = 0; killpid(cd->pid, SIGTERM); break; } } info("PLUGINSD: '%s' on pid %d stopped.", cd->fullfilename, cd->pid); // fgets() failed or loop broke int code = mypclose(fp, cd->pid); if(code == 1 || code == 127) { // 1 = DISABLE // 127 = cannot even run it error("PLUGINSD: '%s' (pid %d) exited with code %d. Disabling it.", cd->fullfilename, cd->pid, code); cd->enabled = 0; } if(netdata_exit) { cd->pid = 0; cd->enabled = 0; cd->obsolete = 1; pthread_exit(NULL); return NULL; } if(unlikely(!count && cd->enabled)) { error("PLUGINSD: '%s' (pid %d) does not generate usefull output. Waiting a bit before starting it again.", cd->fullfilename, cd->pid); sleep((unsigned int) (cd->update_every * 10)); } cd->pid = 0; if(likely(cd->enabled)) sleep((unsigned int) cd->update_every); else break; } cd->obsolete = 1; pthread_exit(NULL); return NULL; }
RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, long multiplier, long divisor, int algorithm) { char filename[FILENAME_MAX + 1]; char fullfilename[FILENAME_MAX + 1]; char varname[CONFIG_MAX_NAME + 1]; RRDDIM *rd = NULL; unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number)); debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id); rrdset_strncpy_name(filename, id, FILENAME_MAX); snprintf(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename); if(rrd_memory_mode != RRD_MEMORY_MODE_RAM) rd = (RRDDIM *)mymmap(fullfilename, size, ((rrd_memory_mode == RRD_MEMORY_MODE_MAP)?MAP_SHARED:MAP_PRIVATE), 1); if(rd) { struct timeval now; gettimeofday(&now, NULL); if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) { errno = 0; info("Initializing file %s.", fullfilename); bzero(rd, size); } else if(rd->memsize != size) { errno = 0; error("File %s does not have the desired size. Clearing it.", fullfilename); bzero(rd, size); } else if(rd->multiplier != multiplier) { errno = 0; error("File %s does not have the same multiplier. Clearing it.", fullfilename); bzero(rd, size); } else if(rd->divisor != divisor) { errno = 0; error("File %s does not have the same divisor. Clearing it.", fullfilename); bzero(rd, size); } else if(rd->algorithm != algorithm) { errno = 0; error("File %s does not have the same algorithm. Clearing it.", fullfilename); bzero(rd, size); } else if(rd->update_every != st->update_every) { errno = 0; error("File %s does not have the same refresh frequency. Clearing it.", fullfilename); bzero(rd, size); } else if(usecdiff(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * 1000000ULL)) { errno = 0; error("File %s is too old. Clearing it.", fullfilename); bzero(rd, size); } else if(strcmp(rd->id, id) != 0) { errno = 0; error("File %s contents are not for dimension %s. Clearing it.", fullfilename, id); // munmap(rd, size); // rd = NULL; bzero(rd, size); } } if(rd) { // we have a file mapped for rd rd->mapped = rrd_memory_mode; rd->flags = 0x00000000; rd->next = NULL; rd->name = NULL; } else { // if we didn't manage to get a mmap'd dimension, just create one rd = calloc(1, size); if(!rd) { fatal("Cannot allocate RRD_DIMENSION %s/%s.", st->id, id); return NULL; } rd->mapped = RRD_MEMORY_MODE_RAM; } rd->memsize = size; strcpy(rd->magic, RRDDIMENSION_MAGIC); strcpy(rd->cache_filename, fullfilename); strncpy(rd->id, id, RRD_ID_LENGTH_MAX); rd->hash = simple_hash(rd->id); snprintf(varname, CONFIG_MAX_NAME, "dim %s name", rd->id); rd->name = config_get(st->id, varname, (name && *name)?name:rd->id); snprintf(varname, CONFIG_MAX_NAME, "dim %s algorithm", rd->id); rd->algorithm = rrddim_algorithm_id(config_get(st->id, varname, rrddim_algorithm_name(algorithm))); snprintf(varname, CONFIG_MAX_NAME, "dim %s multiplier", rd->id); rd->multiplier = config_get_number(st->id, varname, multiplier); snprintf(varname, CONFIG_MAX_NAME, "dim %s divisor", rd->id); rd->divisor = config_get_number(st->id, varname, divisor); if(!rd->divisor) rd->divisor = 1; rd->entries = st->entries; rd->update_every = st->update_every; // prevent incremental calculation spikes rd->counter = 0; // append this dimension pthread_rwlock_wrlock(&st->rwlock); if(!st->dimensions) st->dimensions = rd; else { RRDDIM *td = st->dimensions; for(; td->next; td = td->next) ; td->next = rd; } pthread_rwlock_unlock(&st->rwlock); rrddim_index_add(st, rd); return(rd); }