From: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Date: Wed, 1 Oct 2014 18:43:08 +0000 (+0300)
Subject: evm: skip replacing EVM signature with HMAC on read-only filesystem
X-Git-Tag: omap-for-v3.19/fixes-rc1~83^2~2^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2baec7ffaf6a2c15e03028ed9ef82a92cc49a94;p=pandora-kernel.git

evm: skip replacing EVM signature with HMAC on read-only filesystem

If filesystem is mounted read-only or file is immutable, updating
xattr will fail. This is a usual case during early boot until
filesystem is remount read-write. This patch verifies conditions
to skip unnecessary attempt to calculate HMAC and set xattr.

Changes in v2:
* indention changed according to Lindent (requested by Mimi)

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
---

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