diff options
Diffstat (limited to 'database/rrdlabels.c')
| -rw-r--r-- | database/rrdlabels.c | 1183 |
1 files changed, 1183 insertions, 0 deletions
diff --git a/database/rrdlabels.c b/database/rrdlabels.c new file mode 100644 index 0000000..743499a --- /dev/null +++ b/database/rrdlabels.c @@ -0,0 +1,1183 @@ +// 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; + +} + +size_t text_sanitize(unsigned char *dst, const unsigned char *src, size_t dst_size, unsigned char *char_map, bool utf, const char *empty, size_t *multibyte_length) { + if(unlikely(!dst_size)) return 0; + + if(unlikely(!src || !*src)) { + strncpyz((char *)dst, empty, dst_size); + dst[dst_size - 1] = '\0'; + size_t len = strlen((char *)dst); + if(multibyte_length) *multibyte_length = len; + return len; + } + + 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 + if(*dst == '_') { + unsigned char *t = dst; + while (*t == '_') t++; + if (unlikely(*t == '\0')) { + *dst = '\0'; + mblen = 0; + } + } + + if(unlikely(*dst == '\0')) { + strncpyz((char *)dst, empty, dst_size); + dst[dst_size - 1] = '\0'; + mblen = strlen((char *)dst); + if(multibyte_length) *multibyte_length = mblen; + return mblen; + } + + if(multibyte_length) *multibyte_length = mblen; + + return d - dst; +} + +static inline size_t rrdlabels_sanitize_name(char *dst, const char *src, size_t dst_size) { + return text_sanitize((unsigned char *)dst, (const unsigned char *)src, dst_size, label_names_char_map, 0, "", NULL); +} + +static inline size_t rrdlabels_sanitize_value(char *dst, const char *src, size_t dst_size) { + return text_sanitize((unsigned char *)dst, (const unsigned char *)src, dst_size, label_values_char_map, 1, "[none]", NULL); +} + +// ---------------------------------------------------------------------------- +// 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); +} + +void rrdlabels_flush(DICTIONARY *labels_dict) { + dictionary_flush(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) { + if(!labels) return; + + 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); +} + +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); + + metaqueue_chart_labels(st); +} + + +// ---------------------------------------------------------------------------- +// 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 len = rrdlabels_sanitize_value(buf, src, RRDLABELS_MAX_VALUE_LENGTH); + size_t expected_len = strlen(expected); + + int err = 0; + if(strcmp(buf, expected) != 0) err = 1; + if(len != expected_len) err = 1; + + fprintf(stderr, "%s(%s): %s, expected '%s', got '%s', expected bytes = %zu, got bytes = %zu\n", __FUNCTION__, src, (err==1)?"FAILED":"OK", expected, buf, expected_len, 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; +} |