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netdata/database/rrdlabels.c

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// SPDX-License-Identifier: GPL-3.0-or-later
#define NETDATA_RRD_INTERNALS
#include "rrd.h"
// ----------------------------------------------------------------------------
// labels sanitization
/*
* All labels follow these rules:
*
* Character Symbol Values Names
* UTF-8 characters UTF-8 yes -> _
* Lower case letter [a-z] yes yes
* Upper case letter [A-Z] yes -> [a-z]
* Digit [0-9] yes yes
* Underscore _ yes yes
* Minus - yes yes
* Plus + yes -> _
* Colon : yes -> _
* Semicolon ; -> : -> _
* Equal = -> : -> _
* Period . yes yes
* Comma , -> . -> .
* Slash / yes yes
* Backslash \ -> / -> /
* At @ yes -> _
* Space yes -> _
* Opening parenthesis ( yes -> _
* Closing parenthesis ) yes -> _
* anything else -> _ -> _
*
* The above rules should allow users to set in tags (indicative):
*
* 1. hostnames and domain names as-is
* 2. email addresses as-is
* 3. floating point numbers, converted to always use a dot as the decimal point
*
* Leading and trailing spaces and control characters are removed from both label
* names and values.
*
* Multiple spaces inside the label name or the value are removed (only 1 is retained).
* In names spaces are also converted to underscores.
*
* Names that are only underscores are rejected (they do not enter the dictionary).
*
* The above rules do not require any conversion to be included in JSON strings.
*
* Label names and values are truncated to LABELS_MAX_LENGTH (200) characters.
*
* When parsing, label key and value are separated by the first colon (:) found.
* So label:value1:value2 is parsed as key = "label", value = "value1:value2"
*
* This means a label key cannot contain a colon (:) - it is converted to
* underscore if it does.
*
*/
#define RRDLABELS_MAX_NAME_LENGTH 200
#define RRDLABELS_MAX_VALUE_LENGTH 800 // 800 in bytes, up to 200 UTF-8 characters
static unsigned char label_spaces_char_map[256];
static unsigned char label_names_char_map[256];
static unsigned char label_values_char_map[256] = {
[0] = '\0', //
[1] = '_', //
[2] = '_', //
[3] = '_', //
[4] = '_', //
[5] = '_', //
[6] = '_', //
[7] = '_', //
[8] = '_', //
[9] = '_', //
[10] = '_', //
[11] = '_', //
[12] = '_', //
[13] = '_', //
[14] = '_', //
[15] = '_', //
[16] = '_', //
[17] = '_', //
[18] = '_', //
[19] = '_', //
[20] = '_', //
[21] = '_', //
[22] = '_', //
[23] = '_', //
[24] = '_', //
[25] = '_', //
[26] = '_', //
[27] = '_', //
[28] = '_', //
[29] = '_', //
[30] = '_', //
[31] = '_', //
[32] = ' ', // SPACE keep
[33] = '_', // !
[34] = '_', // "
[35] = '_', // #
[36] = '_', // $
[37] = '_', // %
[38] = '_', // &
[39] = '_', // '
[40] = '(', // ( keep
[41] = ')', // ) keep
[42] = '_', // *
[43] = '+', // + keep
[44] = '.', // , convert , to .
[45] = '-', // - keep
[46] = '.', // . keep
[47] = '/', // / keep
[48] = '0', // 0 keep
[49] = '1', // 1 keep
[50] = '2', // 2 keep
[51] = '3', // 3 keep
[52] = '4', // 4 keep
[53] = '5', // 5 keep
[54] = '6', // 6 keep
[55] = '7', // 7 keep
[56] = '8', // 8 keep
[57] = '9', // 9 keep
[58] = ':', // : keep
[59] = ':', // ; convert ; to :
[60] = '_', // <
[61] = ':', // = convert = to :
[62] = '_', // >
[63] = '_', // ?
[64] = '@', // @
[65] = 'A', // A keep
[66] = 'B', // B keep
[67] = 'C', // C keep
[68] = 'D', // D keep
[69] = 'E', // E keep
[70] = 'F', // F keep
[71] = 'G', // G keep
[72] = 'H', // H keep
[73] = 'I', // I keep
[74] = 'J', // J keep
[75] = 'K', // K keep
[76] = 'L', // L keep
[77] = 'M', // M keep
[78] = 'N', // N keep
[79] = 'O', // O keep
[80] = 'P', // P keep
[81] = 'Q', // Q keep
[82] = 'R', // R keep
[83] = 'S', // S keep
[84] = 'T', // T keep
[85] = 'U', // U keep
[86] = 'V', // V keep
[87] = 'W', // W keep
[88] = 'X', // X keep
[89] = 'Y', // Y keep
[90] = 'Z', // Z keep
[91] = '_', // [
[92] = '/', // backslash convert \ to /
[93] = '_', // ]
[94] = '_', // ^
[95] = '_', // _ keep
[96] = '_', // `
[97] = 'a', // a keep
[98] = 'b', // b keep
[99] = 'c', // c keep
[100] = 'd', // d keep
[101] = 'e', // e keep
[102] = 'f', // f keep
[103] = 'g', // g keep
[104] = 'h', // h keep
[105] = 'i', // i keep
[106] = 'j', // j keep
[107] = 'k', // k keep
[108] = 'l', // l keep
[109] = 'm', // m keep
[110] = 'n', // n keep
[111] = 'o', // o keep
[112] = 'p', // p keep
[113] = 'q', // q keep
[114] = 'r', // r keep
[115] = 's', // s keep
[116] = 't', // t keep
[117] = 'u', // u keep
[118] = 'v', // v keep
[119] = 'w', // w keep
[120] = 'x', // x keep
[121] = 'y', // y keep
[122] = 'z', // z keep
[123] = '_', // {
[124] = '_', // |
[125] = '_', // }
[126] = '_', // ~
[127] = '_', //
[128] = '_', //
[129] = '_', //
[130] = '_', //
[131] = '_', //
[132] = '_', //
[133] = '_', //
[134] = '_', //
[135] = '_', //
[136] = '_', //
[137] = '_', //
[138] = '_', //
[139] = '_', //
[140] = '_', //
[141] = '_', //
[142] = '_', //
[143] = '_', //
[144] = '_', //
[145] = '_', //
[146] = '_', //
[147] = '_', //
[148] = '_', //
[149] = '_', //
[150] = '_', //
[151] = '_', //
[152] = '_', //
[153] = '_', //
[154] = '_', //
[155] = '_', //
[156] = '_', //
[157] = '_', //
[158] = '_', //
[159] = '_', //
[160] = '_', //
[161] = '_', //
[162] = '_', //
[163] = '_', //
[164] = '_', //
[165] = '_', //
[166] = '_', //
[167] = '_', //
[168] = '_', //
[169] = '_', //
[170] = '_', //
[171] = '_', //
[172] = '_', //
[173] = '_', //
[174] = '_', //
[175] = '_', //
[176] = '_', //
[177] = '_', //
[178] = '_', //
[179] = '_', //
[180] = '_', //
[181] = '_', //
[182] = '_', //
[183] = '_', //
[184] = '_', //
[185] = '_', //
[186] = '_', //
[187] = '_', //
[188] = '_', //
[189] = '_', //
[190] = '_', //
[191] = '_', //
[192] = '_', //
[193] = '_', //
[194] = '_', //
[195] = '_', //
[196] = '_', //
[197] = '_', //
[198] = '_', //
[199] = '_', //
[200] = '_', //
[201] = '_', //
[202] = '_', //
[203] = '_', //
[204] = '_', //
[205] = '_', //
[206] = '_', //
[207] = '_', //
[208] = '_', //
[209] = '_', //
[210] = '_', //
[211] = '_', //
[212] = '_', //
[213] = '_', //
[214] = '_', //
[215] = '_', //
[216] = '_', //
[217] = '_', //
[218] = '_', //
[219] = '_', //
[220] = '_', //
[221] = '_', //
[222] = '_', //
[223] = '_', //
[224] = '_', //
[225] = '_', //
[226] = '_', //
[227] = '_', //
[228] = '_', //
[229] = '_', //
[230] = '_', //
[231] = '_', //
[232] = '_', //
[233] = '_', //
[234] = '_', //
[235] = '_', //
[236] = '_', //
[237] = '_', //
[238] = '_', //
[239] = '_', //
[240] = '_', //
[241] = '_', //
[242] = '_', //
[243] = '_', //
[244] = '_', //
[245] = '_', //
[246] = '_', //
[247] = '_', //
[248] = '_', //
[249] = '_', //
[250] = '_', //
[251] = '_', //
[252] = '_', //
[253] = '_', //
[254] = '_', //
[255] = '_' //
};
__attribute__((constructor)) void initialize_labels_keys_char_map(void) {
// copy the values char map to the names char map
size_t i;
for(i = 0; i < 256 ;i++)
label_names_char_map[i] = label_values_char_map[i];
// apply overrides to the label names map
label_names_char_map['A'] = 'a';
label_names_char_map['B'] = 'b';
label_names_char_map['C'] = 'c';
label_names_char_map['D'] = 'd';
label_names_char_map['E'] = 'e';
label_names_char_map['F'] = 'f';
label_names_char_map['G'] = 'g';
label_names_char_map['H'] = 'h';
label_names_char_map['I'] = 'i';
label_names_char_map['J'] = 'j';
label_names_char_map['K'] = 'k';
label_names_char_map['L'] = 'l';
label_names_char_map['M'] = 'm';
label_names_char_map['N'] = 'n';
label_names_char_map['O'] = 'o';
label_names_char_map['P'] = 'p';
label_names_char_map['Q'] = 'q';
label_names_char_map['R'] = 'r';
label_names_char_map['S'] = 's';
label_names_char_map['T'] = 't';
label_names_char_map['U'] = 'u';
label_names_char_map['V'] = 'v';
label_names_char_map['W'] = 'w';
label_names_char_map['X'] = 'x';
label_names_char_map['Y'] = 'y';
label_names_char_map['Z'] = 'z';
label_names_char_map['='] = '_';
label_names_char_map[':'] = '_';
label_names_char_map['+'] = '_';
label_names_char_map[';'] = '_';
label_names_char_map['@'] = '_';
label_names_char_map['('] = '_';
label_names_char_map[')'] = '_';
label_names_char_map[' '] = '_';
label_names_char_map['\\'] = '/';
// create the spaces map
for(i = 0; i < 256 ;i++)
label_spaces_char_map[i] = (isspace(i) || iscntrl(i) || !isprint(i))?1:0;
}
static size_t rrdlabels_sanitize(unsigned char *dst, const unsigned char *src, size_t dst_size, unsigned char *char_map, bool utf, const char *empty) {
if(unlikely(!dst_size)) return 0;
if(unlikely(!src || !*src)) {
strncpyz((char *)dst, empty, dst_size);
dst[dst_size - 1] = '\0';
return strlen((char *)dst);
}
unsigned char *d = dst;
// make room for the final string termination
unsigned char *end = &d[dst_size - 1];
// copy while converting, but keep only one white space
// we start wil last_is_space = 1 to skip leading spaces
int last_is_space = 1;
size_t mblen = 0;
while(*src && d < end) {
unsigned char c = *src;
if(IS_UTF8_STARTBYTE(c) && IS_UTF8_BYTE(src[1]) && d + 2 < end) {
// UTF-8 multi-byte encoded character
// find how big this character is (2-4 bytes)
size_t utf_character_size = 2;
while(utf_character_size <= 4 && src[utf_character_size] && IS_UTF8_BYTE(src[utf_character_size]) && !IS_UTF8_STARTBYTE(src[utf_character_size]))
utf_character_size++;
if(utf) {
while(utf_character_size) {
utf_character_size--;
*d++ = *src++;
}
}
else {
// UTF-8 characters are not allowed.
// Assume it is an underscore
// and skip all except the first byte
*d++ = '_';
src += (utf_character_size - 1);
}
last_is_space = 0;
mblen++;
continue;
}
if(label_spaces_char_map[c]) {
// a space character
if(!last_is_space) {
// add one space
*d++ = char_map[c];
mblen++;
}
last_is_space++;
}
else {
*d++ = char_map[c];
last_is_space = 0;
mblen++;
}
src++;
}
// remove the last trailing space
if(last_is_space && d > dst) {
d--;
mblen--;
}
// put a termination at the end of what we copied
*d = '\0';
// check if dst is all underscores and empty it if it is
d = dst;
while(*d == '_') d++;
if(unlikely(*d == '\0')) {
*dst = '\0';
mblen = 0;
}
if(unlikely(*dst == '\0')) {
strncpyz((char *)dst, empty, dst_size);
dst[dst_size - 1] = '\0';
return strlen((char *)dst);
}
return mblen;
}
static inline size_t rrdlabels_sanitize_name(char *dst, const char *src, size_t dst_size) {
return rrdlabels_sanitize((unsigned char *)dst, (const unsigned char *)src, dst_size, label_names_char_map, 0, "");
}
static inline size_t rrdlabels_sanitize_value(char *dst, const char *src, size_t dst_size) {
return rrdlabels_sanitize((unsigned char *)dst, (const unsigned char *)src, dst_size, label_values_char_map, 1, "[none]");
}
// ----------------------------------------------------------------------------
// rrdlabels_create()
typedef struct rrdlabel {
STRING *label_value;
RRDLABEL_SRC label_source;
} RRDLABEL;
static void rrdlabel_insert_callback(const DICTIONARY_ITEM *item __maybe_unused, void *value, void *dict_ptr __maybe_unused) {
RRDLABEL *lb = (RRDLABEL *)value;
// label_value is already allocated by the STRING
lb->label_source |= RRDLABEL_FLAG_NEW;
lb->label_source &= ~RRDLABEL_FLAG_OLD;
}
static void rrdlabel_delete_callback(const DICTIONARY_ITEM *item __maybe_unused, void *value, void *dict_ptr __maybe_unused) {
RRDLABEL *lb = (RRDLABEL *)value;
string_freez(lb->label_value);
lb->label_value = NULL;
}
static bool rrdlabel_conflict_callback(const DICTIONARY_ITEM *item __maybe_unused, void *oldvalue, void *newvalue, void *dict_ptr __maybe_unused) {
RRDLABEL *lbold = (RRDLABEL *)oldvalue;
RRDLABEL *lbnew = (RRDLABEL *)newvalue;
if(lbold->label_value == lbnew->label_value) {
// they are the same
lbold->label_source |= lbnew->label_source;
lbold->label_source |= RRDLABEL_FLAG_OLD;
lbold->label_source &= ~RRDLABEL_FLAG_NEW;
// free the new one
string_freez(lbnew->label_value);
return false;
}
// they are different
string_freez(lbold->label_value);
lbold->label_value = lbnew->label_value;
lbold->label_source = lbnew->label_source;
lbold->label_source |= RRDLABEL_FLAG_NEW;
lbold->label_source &= ~RRDLABEL_FLAG_OLD;
return true;
}
DICTIONARY *rrdlabels_create(void) {
DICTIONARY *dict = dictionary_create(DICT_OPTION_DONT_OVERWRITE_VALUE);
dictionary_register_insert_callback(dict, rrdlabel_insert_callback, dict);
dictionary_register_delete_callback(dict, rrdlabel_delete_callback, dict);
dictionary_register_conflict_callback(dict, rrdlabel_conflict_callback, dict);
return dict;
}
// ----------------------------------------------------------------------------
// rrdlabels_destroy()
void rrdlabels_destroy(DICTIONARY *labels_dict) {
dictionary_destroy(labels_dict);
}
// ----------------------------------------------------------------------------
// rrdlabels_add()
static void labels_add_already_sanitized(DICTIONARY *dict, const char *key, const char *value, RRDLABEL_SRC ls) {
if(ls & RRDLABEL_FLAG_NEW) ls &= ~RRDLABEL_FLAG_NEW;
if(ls & RRDLABEL_FLAG_OLD) ls &= ~RRDLABEL_FLAG_OLD;
RRDLABEL tmp = {
.label_source = ls,
.label_value = string_strdupz(value)
};
dictionary_set(dict, key, &tmp, sizeof(RRDLABEL));
}
void rrdlabels_add(DICTIONARY *dict, const char *name, const char *value, RRDLABEL_SRC ls) {
if(!dict) {
error("%s(): called with NULL dictionary.", __FUNCTION__ );
return;
}
char n[RRDLABELS_MAX_NAME_LENGTH + 1], v[RRDLABELS_MAX_VALUE_LENGTH + 1];
rrdlabels_sanitize_name(n, name, RRDLABELS_MAX_NAME_LENGTH);
rrdlabels_sanitize_value(v, value, RRDLABELS_MAX_VALUE_LENGTH);
if(!*n) {
error("%s: cannot add name '%s' (value '%s') which is sanitized as empty string", __FUNCTION__, name, value);
return;
}
labels_add_already_sanitized(dict, n, v, ls);
}
static const char *get_quoted_string_up_to(char *dst, size_t dst_size, const char *string, char upto1, char upto2) {
size_t len = 0;
char *d = dst, quote = 0;
while(*string && len++ < dst_size) {
if(unlikely(!quote && (*string == '\'' || *string == '"'))) {
quote = *string++;
continue;
}
if(unlikely(quote && *string == quote)) {
quote = 0;
string++;
continue;
}
if(unlikely(quote && *string == '\\' && string[1])) {
string++;
*d++ = *string++;
continue;
}
if(unlikely(!quote && (*string == upto1 || *string == upto2))) break;
*d++ = *string++;
}
*d = '\0';
if(*string) string++;
return string;
}
void rrdlabels_add_pair(DICTIONARY *dict, const char *string, RRDLABEL_SRC ls) {
if(!dict) {
error("%s(): called with NULL dictionary.", __FUNCTION__ );
return;
}
char name[RRDLABELS_MAX_NAME_LENGTH + 1];
string = get_quoted_string_up_to(name, RRDLABELS_MAX_NAME_LENGTH, string, '=', ':');
char value[RRDLABELS_MAX_VALUE_LENGTH + 1];
get_quoted_string_up_to(value, RRDLABELS_MAX_VALUE_LENGTH, string, '\0', '\0');
rrdlabels_add(dict, name, value, ls);
}
// ----------------------------------------------------------------------------
// rrdlabels_get_value_to_buffer_or_null()
void rrdlabels_get_value_to_buffer_or_null(DICTIONARY *labels, BUFFER *wb, const char *key, const char *quote, const char *null) {
const DICTIONARY_ITEM *acquired_item = dictionary_get_and_acquire_item(labels, key);
RRDLABEL *lb = dictionary_acquired_item_value(acquired_item);
if(lb && lb->label_value)
buffer_sprintf(wb, "%s%s%s", quote, string2str(lb->label_value), quote);
else
buffer_strcat(wb, null);
dictionary_acquired_item_release(labels, acquired_item);
}
// ----------------------------------------------------------------------------
// rrdlabels_get_value_to_char_or_null()
void rrdlabels_get_value_to_char_or_null(DICTIONARY *labels, char **value, const char *key) {
const DICTIONARY_ITEM *acquired_item = dictionary_get_and_acquire_item(labels, key);
RRDLABEL *lb = dictionary_acquired_item_value(acquired_item);
*value = (lb && lb->label_value) ? strdupz(string2str(lb->label_value)) : NULL;
dictionary_acquired_item_release(labels, acquired_item);
}
// ----------------------------------------------------------------------------
// rrdlabels_unmark_all()
// remove labels RRDLABEL_FLAG_OLD and RRDLABEL_FLAG_NEW from all dictionary items
static int remove_flags_old_new(const DICTIONARY_ITEM *item __maybe_unused, void *value, void *data __maybe_unused) {
RRDLABEL *lb = (RRDLABEL *)value;
if(lb->label_source & RRDLABEL_FLAG_OLD) lb->label_source &= ~RRDLABEL_FLAG_OLD;
if(lb->label_source & RRDLABEL_FLAG_NEW) lb->label_source &= ~RRDLABEL_FLAG_NEW;
return 1;
}
void rrdlabels_unmark_all(DICTIONARY *labels) {
dictionary_walkthrough_read(labels, remove_flags_old_new, NULL);
}
// ----------------------------------------------------------------------------
// rrdlabels_remove_all_unmarked()
// remove dictionary items that are neither old, nor new
static int remove_not_old_not_new_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
DICTIONARY *dict = (DICTIONARY *)data;
RRDLABEL *lb = (RRDLABEL *)value;
if(!(lb->label_source & (RRDLABEL_FLAG_OLD | RRDLABEL_FLAG_NEW | RRDLABEL_FLAG_PERMANENT))) {
dictionary_del(dict, name);
return 1;
}
return 0;
}
void rrdlabels_remove_all_unmarked(DICTIONARY *labels) {
dictionary_walkthrough_write(labels, remove_not_old_not_new_callback, labels);
}
// ----------------------------------------------------------------------------
// rrdlabels_walkthrough_read()
struct labels_walkthrough {
int (*callback)(const char *name, const char *value, RRDLABEL_SRC ls, void *data);
void *data;
};
static int labels_walkthrough_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
struct labels_walkthrough *d = (struct labels_walkthrough *)data;
RRDLABEL *lb = (RRDLABEL *)value;
RRDLABEL_SRC ls = lb->label_source;
if(ls & RRDLABEL_FLAG_NEW) ls &= ~RRDLABEL_FLAG_NEW;
if(ls & RRDLABEL_FLAG_OLD) ls &= ~RRDLABEL_FLAG_OLD;
return d->callback(name, string2str(lb->label_value), ls, d->data);
}
int rrdlabels_walkthrough_read(DICTIONARY *labels, int (*callback)(const char *name, const char *value, RRDLABEL_SRC ls, void *data), void *data) {
struct labels_walkthrough d = {
.callback = callback,
.data = data
};
return dictionary_walkthrough_read(labels, labels_walkthrough_callback, &d);
}
int rrdlabels_sorted_walkthrough_read(DICTIONARY *labels, int (*callback)(const char *name, const char *value, RRDLABEL_SRC ls, void *data), void *data) {
struct labels_walkthrough d = {
.callback = callback,
.data = data
};
return dictionary_sorted_walkthrough_read(labels, labels_walkthrough_callback, &d);
}
// ----------------------------------------------------------------------------
// rrdlabels_migrate_to_these()
// migrate an existing label list to a new list, INPLACE
static int copy_label_to_dictionary_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
DICTIONARY *dst = (DICTIONARY *)data;
RRDLABEL *lb = (RRDLABEL *)value;
labels_add_already_sanitized(dst, name, string2str(lb->label_value), lb->label_source);
return 1;
}
void rrdlabels_migrate_to_these(DICTIONARY *dst, DICTIONARY *src) {
if(!dst || !src) return;
// remove the RRDLABEL_FLAG_OLD and RRDLABEL_FLAG_NEW from all items
rrdlabels_unmark_all(dst);
// Mark the existing ones as RRDLABEL_FLAG_OLD,
// or the newly added ones as RRDLABEL_FLAG_NEW
dictionary_walkthrough_read(src, copy_label_to_dictionary_callback, dst);
// remove the unmarked dst
rrdlabels_remove_all_unmarked(dst);
}
void rrdlabels_copy(DICTIONARY *dst, DICTIONARY *src) {
if(!dst || !src) return;
dictionary_walkthrough_read(src, copy_label_to_dictionary_callback, dst);
}
// ----------------------------------------------------------------------------
// rrdlabels_match_simple_pattern()
// returns true when there are keys in the dictionary matching a simple pattern
struct simple_pattern_match_name_value {
SIMPLE_PATTERN *pattern;
char equal;
};
static int simple_pattern_match_name_only_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
struct simple_pattern_match_name_value *t = (struct simple_pattern_match_name_value *)data;
(void)value;
// we return -1 to stop the walkthrough on first match
if(simple_pattern_matches(t->pattern, name)) return -1;
return 0;
}
static int simple_pattern_match_name_and_value_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
struct simple_pattern_match_name_value *t = (struct simple_pattern_match_name_value *)data;
RRDLABEL *lb = (RRDLABEL *)value;
// we return -1 to stop the walkthrough on first match
if(simple_pattern_matches(t->pattern, name)) return -1;
size_t len = RRDLABELS_MAX_NAME_LENGTH + RRDLABELS_MAX_VALUE_LENGTH + 2; // +1 for =, +1 for \0
char tmp[len], *dst = &tmp[0];
const char *v = string2str(lb->label_value);
// copy the name
while(*name) *dst++ = *name++;
// add the equal
*dst++ = t->equal;
// add the value
while(*v) *dst++ = *v++;
// terminate it
*dst = '\0';
if(simple_pattern_matches(t->pattern, tmp)) return -1;
return 0;
}
bool rrdlabels_match_simple_pattern_parsed(DICTIONARY *labels, SIMPLE_PATTERN *pattern, char equal) {
if (!labels) return false;
struct simple_pattern_match_name_value t = {
.pattern = pattern,
.equal = equal
};
int ret = dictionary_walkthrough_read(labels, equal?simple_pattern_match_name_and_value_callback:simple_pattern_match_name_only_callback, &t);
return (ret == -1)?true:false;
}
bool rrdlabels_match_simple_pattern(DICTIONARY *labels, const char *simple_pattern_txt) {
if (!labels) return false;
SIMPLE_PATTERN *pattern = simple_pattern_create(simple_pattern_txt, " ,|\t\r\n\f\v", SIMPLE_PATTERN_EXACT);
char equal = '\0';
const char *s;
for(s = simple_pattern_txt; *s ; s++) {
if (*s == '=' || *s == ':') {
equal = *s;
break;
}
}
bool ret = rrdlabels_match_simple_pattern_parsed(labels, pattern, equal);
simple_pattern_free(pattern);
return ret;
}
// ----------------------------------------------------------------------------
// Log all labels
static int rrdlabels_log_label_to_buffer_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
BUFFER *wb = (BUFFER *)data;
RRDLABEL *lb = (RRDLABEL *)value;
buffer_sprintf(wb, "Label: %s: \"%s\" (", name, string2str(lb->label_value));
size_t sources = 0;
if(lb->label_source & RRDLABEL_SRC_AUTO) {
buffer_sprintf(wb, "auto");
sources++;
}
if(lb->label_source & RRDLABEL_SRC_CONFIG)
buffer_sprintf(wb, "%snetdata.conf", sources++?",":"");
if(lb->label_source & RRDLABEL_SRC_K8S)
buffer_sprintf(wb, "%sk8s", sources++?",":"");
if(lb->label_source & RRDLABEL_SRC_ACLK)
buffer_sprintf(wb, "%saclk", sources++?",":"");
if(!sources)
buffer_strcat(wb, "unknown");
buffer_strcat(wb, ")\n");
return 1;
}
void rrdlabels_log_to_buffer(DICTIONARY *labels, BUFFER *wb) {
dictionary_sorted_walkthrough_read(labels, rrdlabels_log_label_to_buffer_callback, wb);
}
// ----------------------------------------------------------------------------
// rrdlabels_to_buffer()
struct labels_to_buffer {
BUFFER *wb;
bool (*filter_callback)(const char *name, const char *value, RRDLABEL_SRC ls, void *data);
void *filter_data;
void (*name_sanitizer)(char *dst, const char *src, size_t dst_size);
void (*value_sanitizer)(char *dst, const char *src, size_t dst_size);
const char *before_each;
const char *quote;
const char *equal;
const char *between_them;
size_t count;
};
static int label_to_buffer_callback(const DICTIONARY_ITEM *item, void *value, void *data) {
const char *name = dictionary_acquired_item_name(item);
struct labels_to_buffer *t = (struct labels_to_buffer *)data;
RRDLABEL *lb = (RRDLABEL *)value;
size_t n_size = (t->name_sanitizer ) ? ( RRDLABELS_MAX_NAME_LENGTH * 2 ) : 1;
size_t v_size = (t->value_sanitizer) ? ( RRDLABELS_MAX_VALUE_LENGTH * 2 ) : 1;
char n[n_size];
char v[v_size];
const char *nn = name, *vv = string2str(lb->label_value);
if(t->name_sanitizer) {
t->name_sanitizer(n, name, n_size);
nn = n;
}
if(t->value_sanitizer) {
t->value_sanitizer(v, string2str(lb->label_value), v_size);
vv = v;
}
if(!t->filter_callback || t->filter_callback(name, string2str(lb->label_value), lb->label_source, t->filter_data)) {
buffer_sprintf(t->wb, "%s%s%s%s%s%s%s%s%s", t->count++?t->between_them:"", t->before_each, t->quote, nn, t->quote, t->equal, t->quote, vv, t->quote);
return 1;
}
return 0;
}
int rrdlabels_to_buffer(DICTIONARY *labels, BUFFER *wb, const char *before_each, const char *equal, const char *quote, const char *between_them, bool (*filter_callback)(const char *name, const char *value, RRDLABEL_SRC ls, void *data), void *filter_data, void (*name_sanitizer)(char *dst, const char *src, size_t dst_size), void (*value_sanitizer)(char *dst, const char *src, size_t dst_size)) {
struct labels_to_buffer tmp = {
.wb = wb,
.filter_callback = filter_callback,
.filter_data = filter_data,
.name_sanitizer = name_sanitizer,
.value_sanitizer = value_sanitizer,
.before_each = before_each,
.equal = equal,
.quote = quote,
.between_them = between_them,
.count = 0
};
return dictionary_walkthrough_read(labels, label_to_buffer_callback, (void *)&tmp);
}
struct label_str {
BUFFER *sql;
int count;
char uuid_str[UUID_STR_LEN];
};
static int chart_label_store_to_sql_callback(const char *name, const char *value, RRDLABEL_SRC ls, void *data) {
struct label_str *lb = data;
if (unlikely(!lb->count))
buffer_sprintf(lb->sql, "INSERT OR REPLACE INTO chart_label (chart_id, source_type, label_key, label_value, date_created) VALUES ");
else
buffer_strcat(lb->sql, ", ");
buffer_sprintf(lb->sql, "(u2h('%s'), %d,'%s','%s', unixepoch())", lb->uuid_str, ls, name, value);
lb->count++;
return 1;
}
void rrdset_update_rrdlabels(RRDSET *st, DICTIONARY *new_rrdlabels) {
if(!st->rrdlabels)
st->rrdlabels = rrdlabels_create();
if (new_rrdlabels)
rrdlabels_migrate_to_these(st->rrdlabels, new_rrdlabels);
rrdset_save_rrdlabels_to_sql(st);
}
void rrdset_save_rrdlabels_to_sql(RRDSET *st) {
if(!st->rrdlabels) return;
size_t old_version = st->rrdlabels_last_saved_version;
size_t new_version = dictionary_version(st->rrdlabels);
if(new_version != old_version) {
// TODO - we should also cleanup sqlite from old new_rrdlabels that have been removed
BUFFER *sql_buf = buffer_create(1024);
struct label_str tmp = {.sql = sql_buf, .count = 0};
uuid_unparse_lower(st->chart_uuid, tmp.uuid_str);
rrdlabels_walkthrough_read(st->rrdlabels, chart_label_store_to_sql_callback, &tmp);
db_execute(buffer_tostring(sql_buf));
buffer_free(sql_buf);
st->rrdlabels_last_saved_version = new_version;
}
}
// ----------------------------------------------------------------------------
// rrdlabels unit test
struct rrdlabels_unittest_add_a_pair {
const char *pair;
const char *expected_name;
const char *expected_value;
const char *name;
const char *value;
RRDLABEL_SRC ls;
int errors;
};
int rrdlabels_unittest_add_a_pair_callback(const char *name, const char *value, RRDLABEL_SRC ls, void *data) {
struct rrdlabels_unittest_add_a_pair *t = (struct rrdlabels_unittest_add_a_pair *)data;
t->name = name;
t->value = value;
t->ls = ls;
if(strcmp(name, t->expected_name) != 0) {
fprintf(stderr, "name is wrong, found \"%s\", expected \"%s\"", name, t->expected_name);
t->errors++;
}
if(value == NULL && t->expected_value == NULL) {
;
}
else if(value == NULL || t->expected_value == NULL) {
fprintf(stderr, "value is wrong, found \"%s\", expected \"%s\"", value?value:"(null)", t->expected_value?t->expected_value:"(null)");
t->errors++;
}
else if(strcmp(value, t->expected_value) != 0) {
fprintf(stderr, "values don't match, found \"%s\", expected \"%s\"", value, t->expected_value);
t->errors++;
}
return 1;
}
int rrdlabels_unittest_add_a_pair(const char *pair, const char *name, const char *value) {
DICTIONARY *labels = rrdlabels_create();
int errors;
fprintf(stderr, "rrdlabels_add_pair(labels, %s) ... ", pair);
rrdlabels_add_pair(labels, pair, RRDLABEL_SRC_CONFIG);
struct rrdlabels_unittest_add_a_pair tmp = {
.pair = pair,
.expected_name = name,
.expected_value = value,
.errors = 0
};
int ret = rrdlabels_walkthrough_read(labels, rrdlabels_unittest_add_a_pair_callback, &tmp);
errors = tmp.errors;
if(ret != 1) {
fprintf(stderr, "failed to get \"%s\" label", name);
errors++;
}
if(!errors)
fprintf(stderr, " OK, name='%s' and value='%s'\n", tmp.name, tmp.value?tmp.value:"(null)");
else
fprintf(stderr, " FAILED\n");
rrdlabels_destroy(labels);
return errors;
}
int rrdlabels_unittest_add_pairs() {
fprintf(stderr, "\n%s() tests\n", __FUNCTION__);
int errors = 0;
// basic test
errors += rrdlabels_unittest_add_a_pair("tag=value", "tag", "value");
errors += rrdlabels_unittest_add_a_pair("tag:value", "tag", "value");
// test newlines
errors += rrdlabels_unittest_add_a_pair(" tag = \t value \r\n", "tag", "value");
// test : in values
errors += rrdlabels_unittest_add_a_pair("tag=:value", "tag", ":value");
errors += rrdlabels_unittest_add_a_pair("tag::value", "tag", ":value");
errors += rrdlabels_unittest_add_a_pair(" tag = :value ", "tag", ":value");
errors += rrdlabels_unittest_add_a_pair(" tag : :value ", "tag", ":value");
errors += rrdlabels_unittest_add_a_pair("tag:5", "tag", "5");
errors += rrdlabels_unittest_add_a_pair("tag:55", "tag", "55");
errors += rrdlabels_unittest_add_a_pair("tag:aa", "tag", "aa");
errors += rrdlabels_unittest_add_a_pair("tag:a", "tag", "a");
// test empty values
errors += rrdlabels_unittest_add_a_pair("tag", "tag", "[none]");
errors += rrdlabels_unittest_add_a_pair("tag:", "tag", "[none]");
errors += rrdlabels_unittest_add_a_pair("tag:\"\"", "tag", "[none]");
errors += rrdlabels_unittest_add_a_pair("tag:''", "tag", "[none]");
errors += rrdlabels_unittest_add_a_pair("tag:\r\n", "tag", "[none]");
errors += rrdlabels_unittest_add_a_pair("tag\r\n", "tag", "[none]");
// test UTF-8 in values
errors += rrdlabels_unittest_add_a_pair("tag: country:Ελλάδα", "tag", "country:Ελλάδα");
errors += rrdlabels_unittest_add_a_pair("\"tag\": \"country:Ελλάδα\"", "tag", "country:Ελλάδα");
errors += rrdlabels_unittest_add_a_pair("\"tag\": country:\"Ελλάδα\"", "tag", "country:Ελλάδα");
errors += rrdlabels_unittest_add_a_pair("\"tag=1\": country:\"Gre\\\"ece\"", "tag_1", "country:Gre_ece");
errors += rrdlabels_unittest_add_a_pair("\"tag=1\" = country:\"Gre\\\"ece\"", "tag_1", "country:Gre_ece");
errors += rrdlabels_unittest_add_a_pair("\t'LABE=L'\t=\t\"World\" peace", "labe_l", "World peace");
errors += rrdlabels_unittest_add_a_pair("\t'LA\\'B:EL'\t=\tcountry:\"World\":\"Europe\":\"Greece\"", "la_b_el", "country:World:Europe:Greece");
errors += rrdlabels_unittest_add_a_pair("\t'LA\\'B:EL'\t=\tcountry\\\"World\"\\\"Europe\"\\\"Greece\"", "la_b_el", "country/World/Europe/Greece");
errors += rrdlabels_unittest_add_a_pair("NAME=\"VALUE\"", "name", "VALUE");
errors += rrdlabels_unittest_add_a_pair("\"NAME\" : \"VALUE\"", "name", "VALUE");
errors += rrdlabels_unittest_add_a_pair("NAME: \"VALUE\"", "name", "VALUE");
return errors;
}
int rrdlabels_unittest_check_simple_pattern(DICTIONARY *labels, const char *pattern, bool expected) {
fprintf(stderr, "rrdlabels_match_simple_pattern(labels, \"%s\") ... ", pattern);
bool ret = rrdlabels_match_simple_pattern(labels, pattern);
fprintf(stderr, "%s, got %s expected %s\n", (ret == expected)?"OK":"FAILED", ret?"true":"false", expected?"true":"false");
return (ret == expected)?0:1;
}
int rrdlabels_unittest_simple_pattern() {
fprintf(stderr, "\n%s() tests\n", __FUNCTION__);
int errors = 0;
DICTIONARY *labels = rrdlabels_create();
rrdlabels_add(labels, "tag1", "value1", RRDLABEL_SRC_CONFIG);
rrdlabels_add(labels, "tag2", "value2", RRDLABEL_SRC_CONFIG);
rrdlabels_add(labels, "tag3", "value3", RRDLABEL_SRC_CONFIG);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag*", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*1", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "value*", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*=value*", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*:value*", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*2", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "*2 *3", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "!tag3 *2", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag1 tag2", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag1tag2", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "invalid1 invalid2 tag3", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "!tag1 tag4", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag1=value1", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag1=value2", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "tag*=value*", true);
errors += rrdlabels_unittest_check_simple_pattern(labels, "!tag*=value*", false);
errors += rrdlabels_unittest_check_simple_pattern(labels, "!tag2=something2 tag2=*2", true);
rrdlabels_destroy(labels);
return errors;
}
int rrdlabels_unittest_sanitize_value(const char *src, const char *expected) {
char buf[RRDLABELS_MAX_VALUE_LENGTH + 1];
size_t mblen = rrdlabels_sanitize_value(buf, src, RRDLABELS_MAX_VALUE_LENGTH);
int err = 0;
if(strcmp(buf, expected) != 0) err = 1;
fprintf(stderr, "%s(%s): %s, expected '%s', got '%s', mblen = %zu, bytes = %zu\n", __FUNCTION__, src, (err==1)?"FAILED":"OK", expected, buf, mblen, strlen(buf));
return err;
}
int rrdlabels_unittest_sanitization() {
int errors = 0;
errors += rrdlabels_unittest_sanitize_value("", "[none]");
errors += rrdlabels_unittest_sanitize_value("1", "1");
errors += rrdlabels_unittest_sanitize_value(" hello world ", "hello world");
// 2-byte UTF-8
errors += rrdlabels_unittest_sanitize_value(" Ελλάδα ", "Ελλάδα");
errors += rrdlabels_unittest_sanitize_value("aŰbŲcŴ", "aŰbŲcŴ");
errors += rrdlabels_unittest_sanitize_value("Ű b Ų c Ŵ", "Ű b Ų c Ŵ");
// 3-byte UTF-8
errors += rrdlabels_unittest_sanitize_value("‱", "‱");
errors += rrdlabels_unittest_sanitize_value("a‱b", "a‱b");
errors += rrdlabels_unittest_sanitize_value("a ‱ b", "a ‱ b");
// 4-byte UTF-8
errors += rrdlabels_unittest_sanitize_value("𩸽", "𩸽");
errors += rrdlabels_unittest_sanitize_value("a𩸽b", "a𩸽b");
errors += rrdlabels_unittest_sanitize_value("a 𩸽 b", "a 𩸽 b");
// mixed multi-byte
errors += rrdlabels_unittest_sanitize_value("Ű‱𩸽‱Ű", "Ű‱𩸽‱Ű");
return errors;
}
int rrdlabels_unittest(void) {
int errors = 0;
errors += rrdlabels_unittest_sanitization();
errors += rrdlabels_unittest_add_pairs();
errors += rrdlabels_unittest_simple_pattern();
fprintf(stderr, "%d errors found\n", errors);
return errors;
}
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