From: Yuichi Nakamura <ynakam@hitachisoft.jp>
Date: Fri, 14 Sep 2007 00:27:07 +0000 (+0900)
Subject: SELinux: Improve read/write performance
X-Git-Tag: v2.6.24-rc1~824^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=788e7dd4c22e6f41b3a118fd8c291f831f6fddbb;p=pandora-kernel.git

SELinux: Improve read/write performance

It reduces the selinux overhead on read/write by only revalidating
permissions in selinux_file_permission if the task or inode labels have
changed or the policy has changed since the open-time check.  A new LSM
hook, security_dentry_open, is added to capture the necessary state at open
time to allow this optimization.

(see http://marc.info/?l=selinux&m=118972995207740&w=2)

Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
---

Reading git-diff-tree failed