286 lines
9.1 KiB
C
286 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#define NETDATA_HEALTH_INTERNALS
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#include "rrd.h"
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// ----------------------------------------------------------------------------
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// RRDVAR management
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inline int rrdvar_fix_name(char *variable) {
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int fixed = 0;
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while(*variable) {
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if (!isalnum(*variable) && *variable != '.' && *variable != '_') {
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*variable++ = '_';
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fixed++;
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}
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else
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variable++;
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}
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return fixed;
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}
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int rrdvar_compare(void* a, void* b) {
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if(((RRDVAR *)a)->hash < ((RRDVAR *)b)->hash) return -1;
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else if(((RRDVAR *)a)->hash > ((RRDVAR *)b)->hash) return 1;
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else return strcmp(((RRDVAR *)a)->name, ((RRDVAR *)b)->name);
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}
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static inline RRDVAR *rrdvar_index_add(avl_tree_lock *tree, RRDVAR *rv) {
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RRDVAR *ret = (RRDVAR *)avl_insert_lock(tree, (avl *)(rv));
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if(ret != rv)
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debug(D_VARIABLES, "Request to insert RRDVAR '%s' into index failed. Already exists.", rv->name);
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return ret;
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}
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static inline RRDVAR *rrdvar_index_del(avl_tree_lock *tree, RRDVAR *rv) {
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RRDVAR *ret = (RRDVAR *)avl_remove_lock(tree, (avl *)(rv));
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if(!ret)
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error("Request to remove RRDVAR '%s' from index failed. Not Found.", rv->name);
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return ret;
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}
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static inline RRDVAR *rrdvar_index_find(avl_tree_lock *tree, const char *name, uint32_t hash) {
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RRDVAR tmp;
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tmp.name = (char *)name;
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tmp.hash = (hash)?hash:simple_hash(tmp.name);
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return (RRDVAR *)avl_search_lock(tree, (avl *)&tmp);
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}
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inline void rrdvar_free(RRDHOST *host, avl_tree_lock *tree, RRDVAR *rv) {
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(void)host;
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if(!rv) return;
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if(tree) {
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debug(D_VARIABLES, "Deleting variable '%s'", rv->name);
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if(unlikely(!rrdvar_index_del(tree, rv)))
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error("RRDVAR: Attempted to delete variable '%s' from host '%s', but it is not found.", rv->name, host->hostname);
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}
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if(rv->options & RRDVAR_OPTION_ALLOCATED)
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freez(rv->value);
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freez(rv->name);
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freez(rv);
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}
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inline RRDVAR *rrdvar_create_and_index(const char *scope, avl_tree_lock *tree, const char *name, RRDVAR_TYPE type, RRDVAR_OPTIONS options, void *value) {
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char *variable = strdupz(name);
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rrdvar_fix_name(variable);
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uint32_t hash = simple_hash(variable);
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RRDVAR *rv = rrdvar_index_find(tree, variable, hash);
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if(unlikely(!rv)) {
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debug(D_VARIABLES, "Variable '%s' not found in scope '%s'. Creating a new one.", variable, scope);
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rv = callocz(1, sizeof(RRDVAR));
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rv->name = variable;
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rv->hash = hash;
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rv->type = type;
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rv->options = options;
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rv->value = value;
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rv->last_updated = now_realtime_sec();
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RRDVAR *ret = rrdvar_index_add(tree, rv);
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if(unlikely(ret != rv)) {
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debug(D_VARIABLES, "Variable '%s' in scope '%s' already exists", variable, scope);
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freez(rv);
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freez(variable);
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rv = NULL;
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}
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else
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debug(D_VARIABLES, "Variable '%s' created in scope '%s'", variable, scope);
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}
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else {
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debug(D_VARIABLES, "Variable '%s' is already found in scope '%s'.", variable, scope);
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// already exists
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freez(variable);
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// this is important
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// it must return NULL - not the existing variable - or double-free will happen
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rv = NULL;
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}
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return rv;
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}
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void rrdvar_free_remaining_variables(RRDHOST *host, avl_tree_lock *tree_lock) {
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// This is not bullet proof - avl should support some means to destroy it
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// with a callback for each item already in the index
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RRDVAR *rv, *last = NULL;
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while((rv = (RRDVAR *)tree_lock->avl_tree.root)) {
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if(unlikely(rv == last)) {
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error("RRDVAR: INTERNAL ERROR: Cannot cleanup tree of RRDVARs");
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break;
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}
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last = rv;
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rrdvar_free(host, tree_lock, rv);
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}
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}
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// ----------------------------------------------------------------------------
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// CUSTOM HOST VARIABLES
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inline int rrdvar_callback_for_all_host_variables(RRDHOST *host, int (*callback)(void * /*rrdvar*/, void * /*data*/), void *data) {
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return avl_traverse_lock(&host->rrdvar_root_index, callback, data);
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}
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static RRDVAR *rrdvar_custom_variable_create(const char *scope, avl_tree_lock *tree_lock, const char *name) {
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calculated_number *v = callocz(1, sizeof(calculated_number));
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*v = NAN;
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RRDVAR *rv = rrdvar_create_and_index(scope, tree_lock, name, RRDVAR_TYPE_CALCULATED, RRDVAR_OPTION_CUSTOM_HOST_VAR|RRDVAR_OPTION_ALLOCATED, v);
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if(unlikely(!rv)) {
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freez(v);
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debug(D_VARIABLES, "Requested variable '%s' already exists - possibly 2 plugins are updating it at the same time.", name);
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char *variable = strdupz(name);
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rrdvar_fix_name(variable);
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uint32_t hash = simple_hash(variable);
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// find the existing one to return it
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rv = rrdvar_index_find(tree_lock, variable, hash);
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freez(variable);
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}
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return rv;
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}
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RRDVAR *rrdvar_custom_host_variable_create(RRDHOST *host, const char *name) {
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return rrdvar_custom_variable_create("host", &host->rrdvar_root_index, name);
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}
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void rrdvar_custom_host_variable_set(RRDHOST *host, RRDVAR *rv, calculated_number value) {
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if(rv->type != RRDVAR_TYPE_CALCULATED || !(rv->options & RRDVAR_OPTION_CUSTOM_HOST_VAR) || !(rv->options & RRDVAR_OPTION_ALLOCATED))
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error("requested to set variable '%s' to value " CALCULATED_NUMBER_FORMAT " but the variable is not a custom one.", rv->name, value);
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else {
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calculated_number *v = rv->value;
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if(*v != value) {
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*v = value;
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rv->last_updated = now_realtime_sec();
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// if the host is streaming, send this variable upstream immediately
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rrdpush_sender_send_this_host_variable_now(host, rv);
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}
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}
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}
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int foreach_host_variable_callback(RRDHOST *host, int (*callback)(RRDVAR * /*rv*/, void * /*data*/), void *data) {
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return avl_traverse_lock(&host->rrdvar_root_index, (int (*)(void *, void *))callback, data);
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}
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// ----------------------------------------------------------------------------
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// RRDVAR lookup
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calculated_number rrdvar2number(RRDVAR *rv) {
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switch(rv->type) {
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case RRDVAR_TYPE_CALCULATED: {
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calculated_number *n = (calculated_number *)rv->value;
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return *n;
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}
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case RRDVAR_TYPE_TIME_T: {
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time_t *n = (time_t *)rv->value;
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return *n;
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}
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case RRDVAR_TYPE_COLLECTED: {
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collected_number *n = (collected_number *)rv->value;
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return *n;
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}
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case RRDVAR_TYPE_TOTAL: {
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total_number *n = (total_number *)rv->value;
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return *n;
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}
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case RRDVAR_TYPE_INT: {
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int *n = (int *)rv->value;
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return *n;
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}
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default:
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error("I don't know how to convert RRDVAR type %u to calculated_number", rv->type);
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return NAN;
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}
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}
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int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result) {
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RRDSET *st = rc->rrdset;
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if(!st) return 0;
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RRDHOST *host = st->rrdhost;
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RRDVAR *rv;
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rv = rrdvar_index_find(&st->rrdvar_root_index, variable, hash);
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if(rv) {
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*result = rrdvar2number(rv);
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return 1;
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}
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rv = rrdvar_index_find(&st->rrdfamily->rrdvar_root_index, variable, hash);
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if(rv) {
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*result = rrdvar2number(rv);
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return 1;
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}
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rv = rrdvar_index_find(&host->rrdvar_root_index, variable, hash);
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if(rv) {
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*result = rrdvar2number(rv);
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return 1;
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}
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return 0;
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}
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// ----------------------------------------------------------------------------
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// RRDVAR to JSON
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struct variable2json_helper {
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BUFFER *buf;
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size_t counter;
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};
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static int single_variable2json(void *entry, void *data) {
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struct variable2json_helper *helper = (struct variable2json_helper *)data;
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RRDVAR *rv = (RRDVAR *)entry;
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calculated_number value = rrdvar2number(rv);
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if(unlikely(isnan(value) || isinf(value)))
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buffer_sprintf(helper->buf, "%s\n\t\t\"%s\": null", helper->counter?",":"", rv->name);
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else
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buffer_sprintf(helper->buf, "%s\n\t\t\"%s\": %0.5" LONG_DOUBLE_MODIFIER, helper->counter?",":"", rv->name, (LONG_DOUBLE)value);
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helper->counter++;
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return 0;
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}
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void health_api_v1_chart_variables2json(RRDSET *st, BUFFER *buf) {
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RRDHOST *host = st->rrdhost;
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struct variable2json_helper helper = {
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.buf = buf,
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.counter = 0
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};
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buffer_sprintf(buf, "{\n\t\"chart\": \"%s\",\n\t\"chart_name\": \"%s\",\n\t\"chart_context\": \"%s\",\n\t\"chart_variables\": {", st->id, st->name, st->context);
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avl_traverse_lock(&st->rrdvar_root_index, single_variable2json, (void *)&helper);
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buffer_sprintf(buf, "\n\t},\n\t\"family\": \"%s\",\n\t\"family_variables\": {", st->family);
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helper.counter = 0;
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avl_traverse_lock(&st->rrdfamily->rrdvar_root_index, single_variable2json, (void *)&helper);
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buffer_sprintf(buf, "\n\t},\n\t\"host\": \"%s\",\n\t\"host_variables\": {", host->hostname);
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helper.counter = 0;
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avl_traverse_lock(&host->rrdvar_root_index, single_variable2json, (void *)&helper);
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buffer_strcat(buf, "\n\t}\n}\n");
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}
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