From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Wed, 12 Oct 2011 20:23:30 +0000 (-0400)
Subject: xen/blk[front|back]: Enhance discard support with secure erasing support.
X-Git-Tag: v3.3-rc1~49^2~1^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ea42986694a96542644f9cae8b122d3a00c508f;p=pandora-kernel.git

xen/blk[front|back]: Enhance discard support with secure erasing support.

Part of the blkdev_issue_discard(xx) operation is that it can also
issue a secure discard operation that will permanantly remove the
sectors in question. We advertise that we can support that via the
'discard-secure' attribute and on the request, if the 'secure' bit
is set, we will attempt to pass in REQ_DISCARD | REQ_SECURE.

CC: Li Dongyang <lidongyang@novell.com>
[v1: Used 'flag' instead of 'secure:1' bit]
[v2: Use 'reserved' uint8_t instead of adding a new value]
[v3: Check for nseg when mapping instead of operation]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

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