{"id":32507,"date":"2019-10-31T21:47:26","date_gmt":"2019-10-31T18:47:26","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-yadro-linux-dlya-fs-ext4-vklyuchena-podderzhka-raboty-bez-uchyota-registra-simvolov\/"},"modified":"2019-10-31T21:47:26","modified_gmt":"2019-10-31T18:47:26","slug":"v-yadro-linux-dlya-fs-ext4-vklyuchena-podderzhka-raboty-bez-uchyota-registra-simvolov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-yadro-linux-dlya-fs-ext4-vklyuchena-podderzhka-raboty-bez-uchyota-registra-simvolov","title":{"rendered":"J\u00e1dro Linux pro souborov\u00fd syst\u00e9m Ext4 zahrnuje podporu pr\u00e1ce bez ohledu na rozli\u0161ov\u00e1n\u00ed velk\u00fdch a mal\u00fdch p\u00edsmen.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ted Ts'o, autor souborov\u00fdch syst\u00e9m\u016f ext2\/ext3\/ext4, p\u0159ijal<\/a><\/noindex> do v\u011btve Linux-next, na jej\u00edm\u017e z\u00e1klad\u011b bude vytvo\u0159ena verze j\u00e1dra Linux 5.2, sadu zm\u011bny<\/a><\/noindex>, implementuj\u00edc\u00edch podporu operac\u00ed bez ohledu na rozli\u0161en\u00ed velk\u00fdch a mal\u00fdch p\u00edsmen v souborov\u00e9m syst\u00e9mu Ext4. Z\u00e1platy tak\u00e9 p\u0159id\u00e1vaj\u00ed podporu znak\u016f UTF-8 v n\u00e1zvech soubor\u016f.<\/p>\n

Re\u017eim bez ohledu na velikost p\u00edsmen m\u016f\u017ee b\u00fdt voliteln\u011b zapnut v p\u0159ipojen\u00ed k jednotliv\u00fdm adres\u00e1\u0159\u016fm pomoc\u00ed nov\u00e9ho atributu \u00ab+F\u00bb (EXT4_CASEFOLD_FL). Po nastaven\u00ed tohoto atributu na adres\u00e1\u0159 budou ve\u0161ker\u00e9 operace s soubory a podadres\u00e1\u0159i uvnit\u0159 prov\u00e1d\u011bny bez ohledu na velikost p\u00edsmen, v\u010detn\u011b ignorov\u00e1n\u00ed velikosti p\u00edsmen p\u0159i hled\u00e1n\u00ed a otev\u00edr\u00e1n\u00ed soubor\u016f (nap\u0159\u00edklad soubory Test.txt, test.txt a test.TXT budou pova\u017eov\u00e1ny za stejn\u00e9 v takov\u00fdch adres\u00e1\u0159\u00edch). Ve v\u00fdchoz\u00edm nastaven\u00ed, krom\u011b adres\u00e1\u0159\u016f s atributem \u00ab+F\u00bb, z\u016fst\u00e1v\u00e1 FS z\u00e1visl\u00fd na velikosti p\u00edsmen. Pro \u0159\u00edzen\u00ed zapnut\u00ed re\u017eimu nez\u00e1visl\u00e9ho na velikosti p\u00edsmen je navr\u017een modifikovan\u00fd soubor utilit. e2fsprogs<\/a><\/noindex>.<\/p>\n

Z\u00e1platy p\u0159ipravil Gabriel Krisman Bertazi, zam\u011bstnanec spole\u010dnosti Collabora, a byly schv\u00e1leny s sedm\u00e9<\/a><\/noindex> pokusu po t\u0159ech letech<\/a><\/noindex> v\u00fdvoje a odstran\u011bn\u00ed chyb. Implementace neprov\u00e1d\u00ed \u017e\u00e1dn\u00e9 zm\u011bny v form\u00e1tu ukl\u00e1d\u00e1n\u00ed na disk a pracuje v\u00fdlu\u010dn\u011b na \u00farovni zm\u011bny logiky porovn\u00e1v\u00e1n\u00ed n\u00e1zv\u016f ve funkci ext4_lookup() a nahrazen\u00ed hash v struktu\u0159e dcache (Directory Name Lookup Cache). Hodnota atributu \u00ab+F\u00bb je uchov\u00e1na uvnit\u0159 inode jednotliv\u00fdch adres\u00e1\u0159\u016f a vztahuje se na v\u0161echny pod\u0159\u00edzen\u00e9 soubory a podadres\u00e1\u0159e. Informace o k\u00f3dov\u00e1n\u00ed je uchov\u00e1na v superbloku.<\/p>\n

Aby se p\u0159ede\u0161lo koliz\u00edm s n\u00e1zvy existuj\u00edc\u00edch soubor\u016f, m\u016f\u017ee b\u00fdt atribut \u00ab+F\u00bb nastaven pouze na pr\u00e1zdn\u00e9 adres\u00e1\u0159e ve souborov\u00fdch syst\u00e9mech, kde byla p\u0159i montov\u00e1n\u00ed zapnuta podpora Unicode pro n\u00e1zvy soubor\u016f a adres\u00e1\u0159\u016f. N\u00e1zvy prvk\u016f adres\u00e1\u0159\u016f, pro kter\u00e9 je aktivov\u00e1n atribut \u00ab+F\u00bb, se automaticky p\u0159ev\u00e1d\u011bj\u00ed na mal\u00e1 p\u00edsmena a odr\u00e1\u017eej\u00ed se takto v dcache, ale na disku z\u016fst\u00e1vaj\u00ed v p\u016fvodn\u011b zadan\u00e9 podob\u011b u\u017eivatelem, tj. i p\u0159es zpracov\u00e1n\u00ed n\u00e1zv\u016f nez\u00e1visle na velikosti p\u00edsmen se n\u00e1zvy zobrazuj\u00ed a ukl\u00e1daj\u00ed bez ztr\u00e1ty informace o velikosti p\u00edsmen (syst\u00e9m v\u0161ak nedovol\u00ed vytvo\u0159it n\u00e1zev souboru se stejn\u00fdmi znaky, ale v jin\u00e9m registra\u010dn\u00edm stylu).<\/p>\n

<\/a><\/noindex><\/p>\n

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0422\u0435\u0434 \u0426\u043e (Ted Ts’o), \u0430\u0432\u0442\u043e\u0440 \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c ext2\/ext3\/ext4, \u043f\u0440\u0438\u043d\u044f\u043b \u0432 \u0432\u0435\u0442\u043a\u0443 Linux-next, \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0431\u0443\u0434\u0435\u0442 \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u044f\u0434\u0440\u0430 Linux 5.2, \u043d\u0430\u0431\u043e\u0440 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0440\u0435\u0433\u0438\u0441\u0442\u0440\u043e\u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0432 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 Ext4. \u041f\u0430\u0442\u0447\u0438 \u0442\u0430\u043a\u0436\u0435 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 UTF-8 \u0432 \u0438\u043c\u0435\u043d\u0430\u0445 \u0444\u0430\u0439\u043b\u043e\u0432. \u0420\u0435\u0436\u0438\u043c \u0440\u0430\u0431\u043e\u0442\u044b \u0431\u0435\u0437 \u0440\u0430\u0437\u043b\u0438\u0447\u0438\u044f \u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0430 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 \u043e\u043f\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432 \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0435 \u043a \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u043c \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430\u043c \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-32507","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Do j\u00e1dra Linux pro souborov\u00fd syst\u00e9m Ext4 byla p\u0159id\u00e1na podpora pro pr\u00e1ci bez ohledu na velikost p\u00edsmen | ProHoster","description":"Ted Ts'o, autor souborov\u00fdch syst\u00e9m\u016f ext2\/ext3\/ext4, byl p\u0159ijat do v\u011btve Linux-next, na jej\u00edm\u017e z\u00e1klad\u011b 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