diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2010-06-24 14:57:16 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-08-02 15:34:45 +1000 |
| commit | f23571e866309a2048030ef6a5f0725cf139d4c9 (patch) | |
| tree | 0116bcef462f367307b2db927b249b7ce21039c2 /mm/memory_hotplug.c | |
| parent | 5db5a39b6462c8360c9178b28f4b07c320dfca1c (diff) | |
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 <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'mm/memory_hotplug.c')
0 files changed, 0 insertions, 0 deletions