From: Tetsuo Handa Date: Thu, 24 Jun 2010 05:57:16 +0000 (+0900) Subject: TOMOYO: Copy directly to userspace buffer. X-Git-Tag: v2.6.36-rc1~584^2~45 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f23571e866309a2048030ef6a5f0725cf139d4c9;p=pandora-kernel.git TOMOYO: Copy directly to userspace buffer. When userspace program reads policy from /sys/kernel/security/tomoyo/ interface, TOMOYO uses line buffered mode. A line has at least one word. Commit 006dacc "TOMOYO: Support longer pathname." changed a word's max length from 4000 bytes to max kmalloc()able bytes. By that commit, a line's max length changed from 8192 bytes to more than max kmalloc()able bytes. Max number of words in a line remains finite. This patch changes the way of buffering so that all words in a line are firstly directly copied to userspace buffer as much as possible and are secondly queued for next read request. Words queued are guaranteed to be valid until /sys/kernel/security/tomoyo/ interface is close()d. Signed-off-by: Tetsuo Handa Signed-off-by: James Morris --- Reading git-diff-tree failed