{"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\/sk\/blog\/news\/v-yadro-linux-dlya-fs-ext4-vklyuchena-podderzhka-raboty-bez-uchyota-registra-simvolov","title":{"rendered":"Do jadra Linux pre FS Ext4 bola zapnut\u00e1 podpora pre pr\u00e1cu bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ted Ts'o, autor s\u00faborov\u00fdch syst\u00e9mov ext2\/ext3\/ext4, prij\u00edma<\/a><\/noindex> do vetvy Linux-next, na z\u00e1klade ktorej bude vytvoren\u00e1 verzia jadra Linux 5.2, sada zmien<\/a><\/noindex>, implementuj\u00facich podporu oper\u00e1ci\u00ed bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen v s\u00faborovom syst\u00e9me Ext4. Patche tie\u017e prid\u00e1vaj\u00fa podporu UTF-8 znakov v n\u00e1zvoch s\u00faborov.<\/p>\n

Re\u017eim pr\u00e1ce bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen sa volite\u013ene zap\u00edna pri priraden\u00ed k jednotliv\u00fdm adres\u00e1rom pomocou nov\u00e9ho atrib\u00fatu «+F» (EXT4_CASEFOLD_FL). Po nastaven\u00ed tohto atrib\u00fatu na adres\u00e1r sa v\u0161etky oper\u00e1cie s s\u00fabormi a podadres\u00e1rmi vn\u00fatri bud\u00fa vykon\u00e1va\u0165 bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen, vr\u00e1tane toho, \u017ee sa ve\u013ekos\u0165 p\u00edsmen ignoruje pri vyh\u013ead\u00e1van\u00ed a otv\u00e1ran\u00ed s\u00faborov (napr\u00edklad, s\u00fabory Test.txt, test.txt a test.TXT sa v tak\u00fdchto adres\u00e1roch bud\u00fa pova\u017eova\u0165 za rovnak\u00e9). Predvolene, s v\u00fdnimkou adres\u00e1rov s atrib\u00fatom «+F», s\u00faborov\u00fd syst\u00e9m zost\u00e1va citliv\u00fd na ve\u013ekos\u0165 p\u00edsmen. Na spr\u00e1vu zap\u00ednania re\u017eimu necitliv\u00e9ho na ve\u013ekos\u0165 p\u00edsmen sa navrhuje modifikovan\u00e1 sada util\u00edt e2fsprogs<\/a><\/noindex>.<\/p>\n

Patche pripravili Gabriel Krisman Bertazi, zamestnanec spolo\u010dnosti Collabora, a boli prijat\u00e9 s \u013eudov\u00fdmi<\/a><\/noindex> pokusy po troch rokoch<\/a><\/noindex> pre v\u00fdvoj a odstr\u00e1nenie pozn\u00e1mok. Implement\u00e1cia nevykon\u00e1va zmeny v diskovom form\u00e1te ukladania a funguje v\u00fdlu\u010dne na \u00farovni zmeny logiky porovn\u00e1vania mien vo funkcii ext4_lookup() a nahraden\u00ed hash-u v \u0161trukt\u00fare dcache (Directory Name Lookup Cache). Hodnota atrib\u00fatu «+F» sa uchov\u00e1va v inode jednotliv\u00fdch adres\u00e1rov a roz\u0161iruje sa na v\u0161etky vnoren\u00e9 s\u00fabory a podadres\u00e1re. Inform\u00e1cie o k\u00f3dovan\u00ed s\u00fa uchov\u00e1van\u00e9 v superbloku.<\/p>\n

Aby sa predi\u0161lo kol\u00edzi\u00e1m s n\u00e1zvami existuj\u00facich s\u00faborov, atrib\u00fat «+F» m\u00f4\u017ee by\u0165 nastaven\u00fd iba pre pr\u00e1zdne adres\u00e1re v s\u00faborov\u00fdch syst\u00e9moch, v ktor\u00fdch bola pri montovan\u00ed aktivovan\u00e1 podpora Unicode pre n\u00e1zvy s\u00faborov a adres\u00e1rov. N\u00e1zvy prvkov adres\u00e1rov, pre ktor\u00e9 je aktivovan\u00fd atrib\u00fat «+F», sa automaticky preved\u00fa na mal\u00e9 p\u00edsmen\u00e1 a odr\u00e1\u017eaj\u00fa sa v tejto forme v dcache, ale na disku sa uchov\u00e1vaj\u00fa v p\u00f4vodnej podobe ur\u010den\u00e9 pou\u017e\u00edvate\u013eom, t.j. napriek spracovaniu mien bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen, sa n\u00e1zvy zobrazuj\u00fa a uchov\u00e1vaj\u00fa bez straty inform\u00e1ci\u00ed o ve\u013ekosti p\u00edsmen (ale syst\u00e9m nenech\u00e1 vytvori\u0165 n\u00e1zov s\u00faboru s t\u00fdmi ist\u00fdmi symbolmi, ale v inom form\u00e1te p\u00edsmen).<\/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\udd47V jadre Linux pre FS Ext4 je zahrnut\u00e1 podpora pre pr\u00e1cu bez oh\u013eadu na ve\u013ekos\u0165 p\u00edsmen | ProHoster","description":"Ted Ts\u2019o, autor s\u00faborov\u00fdch syst\u00e9mov ext2\/ext3\/ext4, prijal do vetvy Linux-next, na z\u00e1klade ktorej 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