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plugin_tc.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_tc.h"
#define RRD_TYPE_TC "tc"
#define PLUGIN_TC_NAME "tc.plugin"
// ----------------------------------------------------------------------------
// /sbin/tc processor
// this requires the script plugins.d/tc-qos-helper.sh
#define TC_LINE_MAX 1024
struct tc_class {
avl avl;
char *id;
uint32_t hash;
char *name;
char *leafid;
uint32_t leaf_hash;
char *parentid;
uint32_t parent_hash;
char hasparent;
char isleaf;
char isqdisc;
char render;
unsigned long long bytes;
unsigned long long packets;
unsigned long long dropped;
unsigned long long overlimits;
unsigned long long requeues;
unsigned long long lended;
unsigned long long borrowed;
unsigned long long giants;
unsigned long long tokens;
unsigned long long ctokens;
RRDDIM *rd_bytes;
RRDDIM *rd_packets;
RRDDIM *rd_dropped;
RRDDIM *rd_tokens;
RRDDIM *rd_ctokens;
char name_updated;
char updated; // updated bytes
int unupdated; // the number of times, this has been found un-updated
struct tc_class *next;
struct tc_class *prev;
};
struct tc_device {
avl avl;
char *id;
uint32_t hash;
char *name;
char *family;
char name_updated;
char family_updated;
char enabled;
char enabled_bytes;
char enabled_packets;
char enabled_dropped;
char enabled_tokens;
char enabled_ctokens;
char enabled_all_classes_qdiscs;
RRDSET *st_bytes;
RRDSET *st_packets;
RRDSET *st_dropped;
RRDSET *st_tokens;
RRDSET *st_ctokens;
avl_tree classes_index;
struct tc_class *classes;
struct tc_class *last_class;
struct tc_device *next;
struct tc_device *prev;
};
struct tc_device *tc_device_root = NULL;
// ----------------------------------------------------------------------------
// tc_device index
static int tc_device_compare(void* a, void* b) {
if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
}
avl_tree tc_device_root_index = {
NULL,
tc_device_compare
};
#define tc_device_index_add(st) (struct tc_device *)avl_insert(&tc_device_root_index, (avl *)(st))
#define tc_device_index_del(st) (struct tc_device *)avl_remove(&tc_device_root_index, (avl *)(st))
static inline struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
struct tc_device tmp;
tmp.id = (char *)id;
tmp.hash = (hash)?hash:simple_hash(tmp.id);
return (struct tc_device *)avl_search(&(tc_device_root_index), (avl *)&tmp);
}
// ----------------------------------------------------------------------------
// tc_class index
static int tc_class_compare(void* a, void* b) {
if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
}
#define tc_class_index_add(st, rd) (struct tc_class *)avl_insert(&((st)->classes_index), (avl *)(rd))
#define tc_class_index_del(st, rd) (struct tc_class *)avl_remove(&((st)->classes_index), (avl *)(rd))
static inline struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
struct tc_class tmp;
tmp.id = (char *)id;
tmp.hash = (hash)?hash:simple_hash(tmp.id);
return (struct tc_class *)avl_search(&(st->classes_index), (avl *) &tmp);
}
// ----------------------------------------------------------------------------
static inline void tc_class_free(struct tc_device *n, struct tc_class *c) {
if(c == n->classes) {
if(likely(c->next))
n->classes = c->next;
else
n->classes = c->prev;
}
if(c == n->last_class) {
if(unlikely(c->next))
n->last_class = c->next;
else
n->last_class = c->prev;
}
if(c->next) c->next->prev = c->prev;
if(c->prev) c->prev->next = c->next;
debug(D_TC_LOOP, "Removing from device '%s' class '%s', parentid '%s', leafid '%s', unused=%d", n->id, c->id, c->parentid?c->parentid:"", c->leafid?c->leafid:"", c->unupdated);
if(unlikely(tc_class_index_del(n, c) != c))
error("plugin_tc: INTERNAL ERROR: attempt remove class '%s' from device '%s': removed a different calls", c->id, n->id);
freez(c->id);
freez(c->name);
freez(c->leafid);
freez(c->parentid);
freez(c);
}
static inline void tc_device_classes_cleanup(struct tc_device *d) {
static int cleanup_every = 999;
if(unlikely(cleanup_every > 0)) {
cleanup_every = (int) config_get_number("plugin:tc", "cleanup unused classes every", 120);
if(cleanup_every < 0) cleanup_every = -cleanup_every;
}
d->name_updated = 0;
d->family_updated = 0;
struct tc_class *c = d->classes;
while(c) {
if(unlikely(cleanup_every && c->unupdated >= cleanup_every)) {
struct tc_class *nc = c->next;
tc_class_free(d, c);
c = nc;
}
else {
c->updated = 0;
c->name_updated = 0;
c = c->next;
}
}
}
static inline void tc_device_commit(struct tc_device *d) {
static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1, enable_tokens = -1, enable_ctokens = -1, enabled_all_classes_qdiscs = -1;
if(unlikely(enable_new_interfaces == -1)) {
enable_new_interfaces = config_get_boolean_ondemand("plugin:tc", "enable new interfaces detected at runtime", CONFIG_BOOLEAN_YES);
enable_bytes = config_get_boolean_ondemand("plugin:tc", "enable traffic charts for all interfaces", CONFIG_BOOLEAN_AUTO);
enable_packets = config_get_boolean_ondemand("plugin:tc", "enable packets charts for all interfaces", CONFIG_BOOLEAN_AUTO);
enable_dropped = config_get_boolean_ondemand("plugin:tc", "enable dropped charts for all interfaces", CONFIG_BOOLEAN_AUTO);
enable_tokens = config_get_boolean_ondemand("plugin:tc", "enable tokens charts for all interfaces", CONFIG_BOOLEAN_NO);
enable_ctokens = config_get_boolean_ondemand("plugin:tc", "enable ctokens charts for all interfaces", CONFIG_BOOLEAN_NO);
enabled_all_classes_qdiscs = config_get_boolean_ondemand("plugin:tc", "enable show all classes and qdiscs for all interfaces", CONFIG_BOOLEAN_NO);
}
if(unlikely(d->enabled == (char)-1)) {
char var_name[CONFIG_MAX_NAME + 1];
snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
d->enabled = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_new_interfaces);
snprintfz(var_name, CONFIG_MAX_NAME, "traffic chart for %s", d->id);
d->enabled_bytes = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_bytes);
snprintfz(var_name, CONFIG_MAX_NAME, "packets chart for %s", d->id);
d->enabled_packets = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_packets);
snprintfz(var_name, CONFIG_MAX_NAME, "dropped packets chart for %s", d->id);
d->enabled_dropped = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_dropped);
snprintfz(var_name, CONFIG_MAX_NAME, "tokens chart for %s", d->id);
d->enabled_tokens = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_tokens);
snprintfz(var_name, CONFIG_MAX_NAME, "ctokens chart for %s", d->id);
d->enabled_ctokens = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_ctokens);
snprintfz(var_name, CONFIG_MAX_NAME, "show all classes for %s", d->id);
d->enabled_all_classes_qdiscs = (char)config_get_boolean_ondemand("plugin:tc", var_name, enabled_all_classes_qdiscs);
}
// we only need to add leaf classes
struct tc_class *c, *x /*, *root = NULL */;
unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0, tokens_sum = 0, ctokens_sum = 0;
int active_nodes = 0, updated_classes = 0, updated_qdiscs = 0;
// prepare all classes
// we set reasonable defaults for the rest of the code below
for(c = d->classes ; c ; c = c->next) {
c->render = 0; // do not render this class
c->isleaf = 1; // this is a leaf class
c->hasparent = 0; // without a parent
if(unlikely(!c->updated))
c->unupdated++; // increase its unupdated counter
else {
c->unupdated = 0; // reset its unupdated counter
// count how many of each kind
if(c->isqdisc)
updated_qdiscs++;
else
updated_classes++;
}
}
if(unlikely(!d->enabled || (!updated_classes && !updated_qdiscs))) {
debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. It is not enabled/updated.", d->name?d->name:d->id);
tc_device_classes_cleanup(d);
return;
}
if(unlikely(updated_classes && updated_qdiscs)) {
error("TC: device '%s' has active both classes (%d) and qdiscs (%d). Will render only qdiscs.", d->id, updated_classes, updated_qdiscs);
// set all classes to !updated
for(c = d->classes ; c ; c = c->next)
if(unlikely(!c->isqdisc && c->updated))
c->updated = 0;
updated_classes = 0;
}
// mark the classes as leafs and parents
//
// TC is hierarchical:
// - classes can have other classes in them
// - the same is true for qdiscs (i.e. qdiscs have classes, that have other qdiscs)
//
// we need to present a chart with leaf nodes only, so that the sum
// of all dimensions of the chart, will be the total utilization
// of the interface.
//
// here we try to find the ones we need to report
// by default all nodes are marked with: isleaf = 1 (see above)
//
// so, here we remove the isleaf flag from nodes in the middle
// and we add the hasparent flag to leaf nodes we found their parent
if(likely(!d->enabled_all_classes_qdiscs)) {
for(c = d->classes; c; c = c->next) {
if(unlikely(!c->updated)) continue;
//debug(D_TC_LOOP, "TC: In device '%s', %s '%s' has leafid: '%s' and parentid '%s'.",
// d->id,
// c->isqdisc?"qdisc":"class",
// c->id,
// c->leafid?c->leafid:"NULL",
// c->parentid?c->parentid:"NULL");
// find if c is leaf or not
for(x = d->classes; x; x = x->next) {
if(unlikely(!x->updated || c == x || !x->parentid)) continue;
// classes have both parentid and leafid
// qdiscs have only parentid
// the following works for both (it is an OR)
if((c->hash == x->parent_hash && strcmp(c->id, x->parentid) == 0) ||
(c->leafid && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0)) {
// debug(D_TC_LOOP, "TC: In device '%s', %s '%s' (leafid: '%s') has as leaf %s '%s' (parentid: '%s').", d->name?d->name:d->id, c->isqdisc?"qdisc":"class", c->name?c->name:c->id, c->leafid?c->leafid:c->id, x->isqdisc?"qdisc":"class", x->name?x->name:x->id, x->parentid?x->parentid:x->id);
c->isleaf = 0;
x->hasparent = 1;
}
}
}
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->updated)) continue;
// debug(D_TC_LOOP, "TC: device '%s', %s '%s' isleaf=%d, hasparent=%d", d->id, (c->isqdisc)?"qdisc":"class", c->id, c->isleaf, c->hasparent);
if(unlikely((c->isleaf && c->hasparent) || d->enabled_all_classes_qdiscs)) {
c->render = 1;
active_nodes++;
bytes_sum += c->bytes;
packets_sum += c->packets;
dropped_sum += c->dropped;
tokens_sum += c->tokens;
ctokens_sum += c->ctokens;
}
//if(unlikely(!c->hasparent)) {
// if(root) error("TC: multiple root class/qdisc for device '%s' (old: '%s', new: '%s')", d->id, root->id, c->id);
// root = c;
// debug(D_TC_LOOP, "TC: found root class/qdisc '%s'", root->id);
//}
}
#ifdef NETDATA_INTERNAL_CHECKS
// dump all the list to see what we know
if(unlikely(debug_flags & D_TC_LOOP)) {
for(c = d->classes ; c ; c = c->next) {
if(c->render) debug(D_TC_LOOP, "TC: final nodes dump for '%s': class %s, OK", d->name, c->id);
else debug(D_TC_LOOP, "TC: final nodes dump for '%s': class %s, IGNORE (updated: %d, isleaf: %d, hasparent: %d, parent: %s)", d->name?d->name:d->id, c->id, c->updated, c->isleaf, c->hasparent, c->parentid?c->parentid:"(unset)");
}
}
#endif
if(unlikely(!active_nodes)) {
debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No useful classes/qdiscs.", d->name?d->name:d->id);
tc_device_classes_cleanup(d);
return;
}
debug(D_TC_LOOP, "TC: evaluating TC device '%s'. enabled = %d/%d (bytes: %d/%d, packets: %d/%d, dropped: %d/%d, tokens: %d/%d, ctokens: %d/%d, all_classes_qdiscs: %d/%d), classes: (bytes = %llu, packets = %llu, dropped = %llu, tokens = %llu, ctokens = %llu).",
d->name?d->name:d->id,
d->enabled, enable_new_interfaces,
d->enabled_bytes, enable_bytes,
d->enabled_packets, enable_packets,
d->enabled_dropped, enable_dropped,
d->enabled_tokens, enable_tokens,
d->enabled_ctokens, enable_ctokens,
d->enabled_all_classes_qdiscs, enabled_all_classes_qdiscs,
bytes_sum,
packets_sum,
dropped_sum,
tokens_sum,
ctokens_sum
);
// --------------------------------------------------------------------
// bytes
if(d->enabled_bytes == CONFIG_BOOLEAN_YES || (d->enabled_bytes == CONFIG_BOOLEAN_AUTO && bytes_sum)) {
d->enabled_bytes = CONFIG_BOOLEAN_YES;
if(unlikely(!d->st_bytes))
d->st_bytes = rrdset_create_localhost(
RRD_TYPE_TC
, d->id
, d->name ? d->name : d->id
, d->family ? d->family : d->id
, RRD_TYPE_TC ".qos"
, "Class Usage"
, "kilobits/s"
, PLUGIN_TC_NAME
, NULL
, NETDATA_CHART_PRIO_TC_QOS
, localhost->rrd_update_every
, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED
);
else {
rrdset_next(d->st_bytes);
if(unlikely(d->name_updated)) rrdset_set_name(d->st_bytes, d->name);
// TODO
// update the family
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->render)) continue;
if(unlikely(!c->rd_bytes))
c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
else if(unlikely(c->name_updated))
rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
}
rrdset_done(d->st_bytes);
}
// --------------------------------------------------------------------
// packets
if(d->enabled_packets == CONFIG_BOOLEAN_YES || (d->enabled_packets == CONFIG_BOOLEAN_AUTO && packets_sum)) {
d->enabled_packets = CONFIG_BOOLEAN_YES;
if(unlikely(!d->st_packets)) {
char id[RRD_ID_LENGTH_MAX + 1];
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
d->st_packets = rrdset_create_localhost(
RRD_TYPE_TC
, id
, name
, d->family ? d->family : d->id
, RRD_TYPE_TC ".qos_packets"
, "Class Packets"
, "packets/s"
, PLUGIN_TC_NAME
, NULL
, NETDATA_CHART_PRIO_TC_QOS_PACKETS
, localhost->rrd_update_every
, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED
);
}
else {
rrdset_next(d->st_packets);
if(unlikely(d->name_updated)) {
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
rrdset_set_name(d->st_packets, name);
}
// TODO
// update the family
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->render)) continue;
if(unlikely(!c->rd_packets))
c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRD_ALGORITHM_INCREMENTAL);
else if(unlikely(c->name_updated))
rrddim_set_name(d->st_packets, c->rd_packets, c->name);
rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
}
rrdset_done(d->st_packets);
}
// --------------------------------------------------------------------
// dropped
if(d->enabled_dropped == CONFIG_BOOLEAN_YES || (d->enabled_dropped == CONFIG_BOOLEAN_AUTO && dropped_sum)) {
d->enabled_dropped = CONFIG_BOOLEAN_YES;
if(unlikely(!d->st_dropped)) {
char id[RRD_ID_LENGTH_MAX + 1];
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
d->st_dropped = rrdset_create_localhost(
RRD_TYPE_TC
, id
, name
, d->family ? d->family : d->id
, RRD_TYPE_TC ".qos_dropped"
, "Class Dropped Packets"
, "packets/s"
, PLUGIN_TC_NAME
, NULL
, NETDATA_CHART_PRIO_TC_QOS_DROPPED
, localhost->rrd_update_every
, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED
);
}
else {
rrdset_next(d->st_dropped);
if(unlikely(d->name_updated)) {
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
rrdset_set_name(d->st_dropped, name);
}
// TODO
// update the family
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->render)) continue;
if(unlikely(!c->rd_dropped))
c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRD_ALGORITHM_INCREMENTAL);
else if(unlikely(c->name_updated))
rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
}
rrdset_done(d->st_dropped);
}
// --------------------------------------------------------------------
// tokens
if(d->enabled_tokens == CONFIG_BOOLEAN_YES || (d->enabled_tokens == CONFIG_BOOLEAN_AUTO && tokens_sum)) {
d->enabled_tokens = CONFIG_BOOLEAN_YES;
if(unlikely(!d->st_tokens)) {
char id[RRD_ID_LENGTH_MAX + 1];
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(id, RRD_ID_LENGTH_MAX, "%s_tokens", d->id);
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
d->st_tokens = rrdset_create_localhost(
RRD_TYPE_TC
, id
, name
, d->family ? d->family : d->id
, RRD_TYPE_TC ".qos_tokens"
, "Class Tokens"
, "tokens"
, PLUGIN_TC_NAME
, NULL
, NETDATA_CHART_PRIO_TC_QOS_TOCKENS
, localhost->rrd_update_every
, RRDSET_TYPE_LINE
);
}
else {
rrdset_next(d->st_tokens);
if(unlikely(d->name_updated)) {
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
rrdset_set_name(d->st_tokens, name);
}
// TODO
// update the family
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->render)) continue;
if(unlikely(!c->rd_tokens)) {
c->rd_tokens = rrddim_add(d->st_tokens, c->id, c->name?c->name:c->id, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else if(unlikely(c->name_updated))
rrddim_set_name(d->st_tokens, c->rd_tokens, c->name);
rrddim_set_by_pointer(d->st_tokens, c->rd_tokens, c->tokens);
}
rrdset_done(d->st_tokens);
}
// --------------------------------------------------------------------
// ctokens
if(d->enabled_ctokens == CONFIG_BOOLEAN_YES || (d->enabled_ctokens == CONFIG_BOOLEAN_AUTO && ctokens_sum)) {
d->enabled_ctokens = CONFIG_BOOLEAN_YES;
if(unlikely(!d->st_ctokens)) {
char id[RRD_ID_LENGTH_MAX + 1];
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(id, RRD_ID_LENGTH_MAX, "%s_ctokens", d->id);
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
d->st_ctokens = rrdset_create_localhost(
RRD_TYPE_TC
, id
, name
, d->family ? d->family : d->id
, RRD_TYPE_TC ".qos_ctokens"
, "Class cTokens"
, "ctokens"
, PLUGIN_TC_NAME
, NULL
, NETDATA_CHART_PRIO_TC_QOS_CTOCKENS
, localhost->rrd_update_every
, RRDSET_TYPE_LINE
);
}
else {
debug(D_TC_LOOP, "TC: Updating _ctokens chart for device '%s'", d->name?d->name:d->id);
rrdset_next(d->st_ctokens);
if(unlikely(d->name_updated)) {
char name[RRD_ID_LENGTH_MAX + 1];
snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
rrdset_set_name(d->st_ctokens, name);
}
// TODO
// update the family
}
for(c = d->classes ; c ; c = c->next) {
if(unlikely(!c->render)) continue;
if(unlikely(!c->rd_ctokens))
c->rd_ctokens = rrddim_add(d->st_ctokens, c->id, c->name?c->name:c->id, 1, 1, RRD_ALGORITHM_ABSOLUTE);
else if(unlikely(c->name_updated))
rrddim_set_name(d->st_ctokens, c->rd_ctokens, c->name);
rrddim_set_by_pointer(d->st_ctokens, c->rd_ctokens, c->ctokens);
}
rrdset_done(d->st_ctokens);
}
tc_device_classes_cleanup(d);
}
static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name) {
if(unlikely(!name || !*name)) return;
struct tc_class *c = tc_class_index_find(d, id, 0);
if(likely(c)) {
if(likely(c->name)) {
if(!strcmp(c->name, name)) return;
freez(c->name);
c->name = NULL;
}
if(likely(name && *name && strcmp(c->id, name) != 0)) {
debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
c->name = strdupz(name);
c->name_updated = 1;
}
}
}
static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
if(unlikely(!name || !*name)) return;
if(d->name) {
if(!strcmp(d->name, name)) return;
freez(d->name);
d->name = NULL;
}
if(likely(name && *name && strcmp(d->id, name) != 0)) {
debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
d->name = strdupz(name);
d->name_updated = 1;
}
}
static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
freez(d->family);
d->family = NULL;
if(likely(family && *family && strcmp(d->id, family) != 0)) {
debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
d->family = strdupz(family);
d->family_updated = 1;
}
// no need for null termination - it is already null
}
static inline struct tc_device *tc_device_create(char *id)
{
struct tc_device *d = tc_device_index_find(id, 0);
if(!d) {
debug(D_TC_LOOP, "TC: Creating device '%s'", id);
d = callocz(1, sizeof(struct tc_device));
d->id = strdupz(id);
d->hash = simple_hash(d->id);
d->enabled = (char)-1;
avl_init(&d->classes_index, tc_class_compare);
if(unlikely(tc_device_index_add(d) != d))
error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", d->id);
if(!tc_device_root) {
tc_device_root = d;
}
else {
d->next = tc_device_root;
tc_device_root->prev = d;
tc_device_root = d;
}
}
return(d);
}
static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char qdisc, char *parentid, char *leafid)
{
struct tc_class *c = tc_class_index_find(n, id, 0);
if(!c) {
debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
c = callocz(1, sizeof(struct tc_class));
if(unlikely(!n->classes))
n->classes = c;
else if(likely(n->last_class)) {
n->last_class->next = c;
c->prev = n->last_class;
}
n->last_class = c;
c->id = strdupz(id);
c->hash = simple_hash(c->id);
c->isqdisc = qdisc;
if(parentid && *parentid) {
c->parentid = strdupz(parentid);
c->parent_hash = simple_hash(c->parentid);
}
if(leafid && *leafid) {
c->leafid = strdupz(leafid);
c->leaf_hash = simple_hash(c->leafid);
}
if(unlikely(tc_class_index_add(n, c) != c))
error("plugin_tc: INTERNAL ERROR: attempt index class '%s' on device '%s': already exists", c->id, n->id);
}
return(c);
}
static inline void tc_device_free(struct tc_device *n)
{
if(n->next) n->next->prev = n->prev;
if(n->prev) n->prev->next = n->next;
if(tc_device_root == n) {
if(n->next) tc_device_root = n->next;
else tc_device_root = n->prev;
}
if(unlikely(tc_device_index_del(n) != n))
error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", n->id);
while(n->classes) tc_class_free(n, n->classes);
freez(n->id);
freez(n->name);
freez(n->family);
freez(n);
}
static inline void tc_device_free_all()
{
while(tc_device_root)
tc_device_free(tc_device_root);
}
#define PLUGINSD_MAX_WORDS 20
static inline int tc_space(char c) {
switch(c) {
case ' ':
case '\t':
case '\r':
case '\n':
return 1;
default:
return 0;
}
}
static inline void tc_split_words(char *str, char **words, int max_words) {
char *s = str;
int i = 0;
// skip all white space
while(tc_space(*s)) s++;
// store the first word
words[i++] = s;
// while we have something
while(*s) {
// if it is a space
if(unlikely(tc_space(*s))) {
// terminate the word
*s++ = '\0';
// skip all white space
while(tc_space(*s)) s++;
// if we reached the end, stop
if(!*s) break;
// store the next word
if(i < max_words) words[i++] = s;
else break;
}
else s++;
}
// terminate the words
while(i < max_words) words[i++] = NULL;
}
static pid_t tc_child_pid = 0;
static void tc_main_cleanup(void *ptr) {
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
info("cleaning up...");
if(tc_child_pid) {
info("TC: killing with SIGTERM tc-qos-helper process %d", tc_child_pid);
if(killpid(tc_child_pid, SIGTERM) != -1) {
siginfo_t info;
info("TC: waiting for tc plugin child process pid %d to exit...", tc_child_pid);
waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
// info("TC: finished tc plugin child process pid %d.", tc_child_pid);
}
tc_child_pid = 0;
}
static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
}
void *tc_main(void *ptr) {
netdata_thread_cleanup_push(tc_main_cleanup, ptr);
struct rusage thread;
char command[FILENAME_MAX + 1];
char *words[PLUGINSD_MAX_WORDS] = { NULL };
uint32_t BEGIN_HASH = simple_hash("BEGIN");
uint32_t END_HASH = simple_hash("END");
uint32_t QDISC_HASH = simple_hash("qdisc");
uint32_t CLASS_HASH = simple_hash("class");
uint32_t SENT_HASH = simple_hash("Sent");
uint32_t LENDED_HASH = simple_hash("lended:");
uint32_t TOKENS_HASH = simple_hash("tokens:");
uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
uint32_t first_hash;
snprintfz(command, TC_LINE_MAX, "%s/tc-qos-helper.sh", netdata_configured_primary_plugins_dir);
char *tc_script = config_get("plugin:tc", "script to run to get tc values", command);
while(!netdata_exit) {
FILE *fp;
struct tc_device *device = NULL;
struct tc_class *class = NULL;
snprintfz(command, TC_LINE_MAX, "exec %s %d", tc_script, localhost->rrd_update_every);
debug(D_TC_LOOP, "executing '%s'", command);
fp = mypopen(command, (pid_t *)&tc_child_pid);
if(unlikely(!fp)) {
error("TC: Cannot popen(\"%s\", \"r\").", command);
goto cleanup;
}
char buffer[TC_LINE_MAX+1] = "";
while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
if(unlikely(netdata_exit)) break;
buffer[TC_LINE_MAX] = '\0';
// debug(D_TC_LOOP, "TC: read '%s'", buffer);
tc_split_words(buffer, words, PLUGINSD_MAX_WORDS);
if(unlikely(!words[0] || !*words[0])) {
// debug(D_TC_LOOP, "empty line");
continue;
}
// else debug(D_TC_LOOP, "First word is '%s'", words[0]);
first_hash = simple_hash(words[0]);
if(unlikely(device && ((first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) || (first_hash == QDISC_HASH && strcmp(words[0], "qdisc") == 0)))) {
// debug(D_TC_LOOP, "CLASS line on class id='%s', parent='%s', parentid='%s', leaf='%s', leafid='%s'", words[2], words[3], words[4], words[5], words[6]);
char *type = words[1]; // the class/qdisc type: htb, fq_codel, etc
char *id = words[2]; // the class/qdisc major:minor
char *parent = words[3]; // the word 'parent' or 'root'
char *parentid = words[4]; // parentid
char *leaf = words[5]; // the word 'leaf'
char *leafid = words[6]; // leafid
int parent_is_root = 0;
int parent_is_parent = 0;
if(likely(parent)) {
parent_is_parent = !strcmp(parent, "parent");
if(!parent_is_parent)
parent_is_root = !strcmp(parent, "root");
}
if(likely(type && id && (parent_is_root || parent_is_parent))) {
char qdisc = 0;
if(first_hash == QDISC_HASH) {
qdisc = 1;
if(!strcmp(type, "ingress")) {
// we don't want to get the ingress qdisc
// there should be an IFB interface for this
class = NULL;
continue;
}
if(parent_is_parent && parentid) {
// eliminate the minor number from parentid
// why: parentid is the id of the parent class
// but major: is also the id of the parent qdisc
char *s = parentid;
while(*s && *s != ':') s++;
if(*s == ':') s[1] = '\0';
}
}
if(parent_is_root) {
parentid = NULL;
leafid = NULL;
}
else if(!leaf || strcmp(leaf, "leaf") != 0)
leafid = NULL;
char leafbuf[20 + 1] = "";
if(leafid && leafid[strlen(leafid) - 1] == ':') {
strncpyz(leafbuf, leafid, 20 - 1);
strcat(leafbuf, "1");
leafid = leafbuf;
}
class = tc_class_add(device, id, qdisc, parentid, leafid);
}
else {
// clear the last class
class = NULL;
}
}
else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
// debug(D_TC_LOOP, "END line");
if(likely(device)) {
netdata_thread_disable_cancelability();
tc_device_commit(device);
// tc_device_free(device);
netdata_thread_enable_cancelability();
}
device = NULL;
class = NULL;
}
else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
// debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
if(likely(words[1] && *words[1])) {
device = tc_device_create(words[1]);
}
else {
// tc_device_free(device);
device = NULL;
}