{"id":90687,"date":"2020-08-04T13:42:33","date_gmt":"2020-08-04T11:42:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predlozhenie-po-blokirovke-drajverov-prosloek-predostavlyayushhih-dostup-k-gpl-vyzovam-yadra-linux"},"modified":"2020-08-04T13:42:33","modified_gmt":"2020-08-04T11:42:33","slug":"predlozhenie-po-blokirovke-drajverov-prosloek-predostavlyayushhih-dostup-k-gpl-vyzovam-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/predlozhenie-po-blokirovke-drajverov-prosloek-predostavlyayushhih-dostup-k-gpl-vyzovam-yadra-linux","title":{"rendered":"Nab\u00eddka na blokov\u00e1n\u00ed ovlada\u010d\u016f, kter\u00e9 poskytuj\u00ed p\u0159\u00edstup k GPL vol\u00e1n\u00edm j\u00e1dra Linuxu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Christoph Hellwig, zn\u00e1m\u00fd v\u00fdvoj\u00e1\u0159 j\u00e1dra Linux, kter\u00fd byl v minulosti \u010dlenem \u0159\u00eddic\u00edho technick\u00e9ho v\u00fdboru organizace Linux Foundation a vystupoval jako \u017ealobce v souvisej\u00edc\u00edm \u0159\u00edzen\u00ed t\u00fdkaj\u00edc\u00edm se GPL soudn\u00ed \u0159\u00edzen\u00ed<\/a><\/noindex> s VMware, navrhl<\/a><\/noindex> zp\u0159\u00edsnit ochranu proti spojov\u00e1n\u00ed propriet\u00e1rn\u00edch ovlada\u010d\u016f s komponenty j\u00e1dra Linux, kter\u00e9 jsou exportov\u00e1ny pouze pro moduly pod licenc\u00ed GPL. Aby obch\u00e1zeli omezen\u00ed na export GPL-symbol\u016f, v\u00fdrobci propriet\u00e1rn\u00edch ovlada\u010d\u016f pou\u017e\u00edvaj\u00ed aplika\u010dn\u00ed modul, jeho\u017e k\u00f3d je otev\u0159en\u00fd a distribuov\u00e1n pod licenc\u00ed GPLv2, ale jeho funkce spo\u010d\u00edv\u00e1 v p\u0159ekladu p\u0159\u00edstupu propriet\u00e1rn\u00edho ovlada\u010de k nezbytn\u00fdm API j\u00e1dra, kter\u00e9 je zak\u00e1z\u00e1no pou\u017e\u00edvat p\u0159\u00edmo z propriet\u00e1rn\u00edho k\u00f3du.<\/p>\n

K zablokov\u00e1n\u00ed takov\u00e9ho man\u00e9vru Christoph Hellwig p\u0159ipravil<\/a><\/noindex> pro j\u00e1dro Linux patche, kter\u00e9 zaji\u0161\u0165uj\u00ed d\u011bd\u011bn\u00ed p\u0159\u00edznak\u016f spojen\u00fdch s exportem GPL symbol\u016f. N\u00e1vrh se t\u00fdk\u00e1 d\u011bd\u011bn\u00ed p\u0159\u00edznaku TAINT_PROPRIETARY_MODULE ve v\u0161ech modulech, kter\u00e9 importuj\u00ed symboly z modul\u016f s t\u00edmto p\u0159\u00edznakem. Tak\u017ee pokud se GPL modul sna\u017e\u00ed importovat symboly z ne-GPL modulu, GPL modul zd\u011bd\u00ed ozna\u010den\u00ed TAINT_PROPRIETARY_MODULE a nebude moci p\u0159istupovat k j\u00e1drov\u00fdm komponent\u016fm dostupn\u00fdm pouze pro moduly pod licenc\u00ed GPL, i kdy\u017e modul d\u0159\u00edve importoval symboly z kategorie \u201egplonly\u201c. <\/p>\n

B\u011bhem diskuse bylo tak\u00e9 n\u00e1vrh<\/a><\/noindex> n\u00e1vrh na zp\u011btnou blokaci \u2014 pokud modul importuje symboly EXPORT_SYMBOL_GPL, \u017e\u00e1dn\u00e9 symboly exportovan\u00e9 t\u00edmto modulem nesm\u00ed b\u00fdt importov\u00e1ny moduly, kter\u00e9 v\u00fdslovn\u011b neprohla\u0161uj\u00ed o kompatibilit\u011b s GPL. Tj. pokud modul importuje symboly EXPORT_SYMBOL_GPL, mus\u00ed b\u00fdt v\u0161echny jeho exportovan\u00e9 symboly zpracov\u00e1v\u00e1ny jako EXPORT_SYMBOL_GPL. Christoph Helwig napsal<\/a><\/noindex>, \u017ee s t\u00edmto n\u00e1vrhem 100% souhlas\u00ed, ale tuto zm\u011bnu Linus Torvalds neschv\u00e1l\u00ed, proto\u017ee by vedla k nedostupnosti v\u011bt\u0161iny subsyst\u00e9m\u016f j\u00e1dra pro propriet\u00e1rn\u00ed ovlada\u010de, proto\u017ee p\u0159i v\u00fdvoji ovlada\u010d\u016f se p\u0159ipojuj\u00ed z\u00e1kladn\u00ed symboly, kter\u00e9 jsou exportov\u00e1ny pod GPL.<\/p>\n

Zm\u011bna byla navr\u017eena v reakci na publikaci<\/a><\/noindex> in\u017een\u00fdrem z Facebooku s\u00e9rii z\u00e1plat s implementac\u00ed nov\u00e9ho subsyst\u00e9mu netgpu, kter\u00fd umo\u017e\u0148uje organizovat p\u0159\u00edm\u00fd p\u0159enos dat (DMA
\nzero-copy) mezi s\u00ed\u0165ovou kartou a GPU, p\u0159i\u010dem\u017e zpracov\u00e1n\u00ed protokolu prob\u00edh\u00e1 silami CPU. Nespokojenost<\/a><\/noindex> v\u00fdvoj\u00e1\u0159\u016f vyvolala dostupnost<\/a><\/noindex> realizace pouze pro propriet\u00e1rn\u00ed ovlada\u010de NVIDIA prost\u0159ednictv\u00edm GPL vrstvy poskytovan\u00e9 t\u011bmito ovlada\u010di. V reakci na kritiku<\/a><\/noindex> autor patch\u016f uvedl<\/a><\/noindex>, \u017ee subsyst\u00e9m nen\u00ed v\u00e1z\u00e1n na NVIDIA a jeho podpora m\u016f\u017ee b\u00fdt zaji\u0161t\u011bna tak\u00e9 pro programov\u00e9 rozhran\u00ed k GPU AMD a Intel. V\u00fdsledkem bylo, \u017ee propagace netgpu do j\u00e1dra byla uzn\u00e1na za nemo\u017enou do doby, ne\u017e se objev\u00ed funk\u010dn\u00ed podpora zalo\u017een\u00e1 na svobodn\u00fdch ovlada\u010d\u00edch, jako jsou AMDGPU, Intel i915 nebo Nouveau. <\/p>\n

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

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

\u041a\u0440\u0438\u0441\u0442\u043e\u0444 \u0425\u0435\u043b\u0432\u0438\u0433 (Christoph Hellwig), \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u044f\u0434\u0440\u0430 Linux, \u0432 \u0441\u0432\u043e\u0451 \u0432\u0440\u0435\u043c\u044f \u0432\u0445\u043e\u0434\u0438\u0432\u0448\u0438\u0439 \u0432 \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043a\u043e\u043c\u0438\u0442\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 Linux Foundation \u0438 \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0432\u0448\u0438\u0439 \u0438\u0441\u0442\u0446\u043e\u043c \u0432 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u043c \u0441 GPL \u0441\u0443\u0434\u0435\u0431\u043d\u043e\u043c \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0435 \u0441 VMware, 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