{"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\/nl\/blog\/news\/v-yadro-linux-dlya-fs-ext4-vklyuchena-podderzhka-raboty-bez-uchyota-registra-simvolov","title":{"rendered":"De Linux-kernel voor het Ext4-bestandssysteem heeft ondersteuning voor hoofdlettergevoelige en niet-hoofdlettergevoelige besturingssystemen opgenomen.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ted Ts'o, de auteur van de ext2\/ext3\/ext4 bestandssystemen, heeft<\/a><\/noindex> in de Linux-next tak, waaruit de Linux-kernel 5.2 zal worden samengesteld, een set wijzigingen<\/a><\/noindex>, die ondersteuning biedt voor case-insensitive operaties in het Ext4-bestandssysteem. De patches voegen ook ondersteuning toe voor UTF-8-tekens in bestandsnamen.<\/p>\n

De case-insensitive modus kan optioneel worden ingeschakeld voor specifieke mappen met behulp van de nieuwe attribuut \u2018+F\u2019 (EXT4_CASEFOLD_FL). Wanneer dit attribuut op een map wordt ingesteld, worden alle bestands- en submapbewerkingen binnen die map zonder rekening te houden met hoofdletters uitgevoerd. Hoofdletters worden genegeerd bij zoek- en openbewerkingen, bijvoorbeeld bestanden zoals Test.txt, test.txt en test.TXT worden als gelijk beschouwd in dergelijke mappen. Standaard blijft het bestandssysteem hoofdlettergevoelig, behalve voor mappen met het attribuut \u2018+F\u2019. Een aangepaste set van hulpprogramma's wordt aangeboden om de inschakeling van de case-insensitive modus te beheren. e2fsprogs<\/a><\/noindex>.<\/p>\n

De patches zijn voorbereid door Gabriel Krisman Bertazi, een medewerker van Collabora, en zijn aangenomen na de zevende<\/a><\/noindex> poging na drie jaar<\/a><\/noindex> ontwikkeling en het oplossen van opmerkingen. De implementatie brengt geen wijzigingen aan in het schijfopslagformaat en werkt uitsluitend op het niveau van het wijzigen van de naamvergelijkingslogica in de functie ext4_lookup() en de vervanging van de hash in de dcache (Directory Name Lookup Cache). De waarde van het attribuut \u2018+F\u2019 wordt opgeslagen binnen de inode van afzonderlijke mappen en wordt doorgegeven aan alle subbestanden en submappen. Informatie over de codering wordt opgeslagen in de superblock.<\/p>\n

Om conflicten met de namen van bestaande bestanden te voorkomen, kan het attribuut \u2018+F\u2019 alleen op lege mappen worden ingesteld in bestandssystemen waar de ondersteuning voor Unicode in bestands- en mapnamen is ingeschakeld tijdens het mounten. Namen van elementen in mappen waarvoor het attribuut \u2018+F\u2019 is geactiveerd, worden automatisch omgezet naar kleine letters en verschijnen zo in de dcache, maar worden op de schijf opgeslagen in de oorspronkelijk door de gebruiker opgegeven vorm. Dit betekent dat hoewel de namen onafhankelijk van hoofdletters worden behandeld, ze worden weergegeven en opgeslagen zonder verlies van informatie over hoofdletters (maar het systeem laat geen bestandnaam met dezelfde karakters in een andere hoofdletterstructuur maken).<\/p>\n

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

Bron: 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 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