linux-kernel - [PATCH 0/2] vfs: Report a mount r/o if the superblock is

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Message-Id: <1363277360-1947-1-git-send-email-shea@shealevy.com>
Date:	Thu, 14 Mar 2013 12:09:18 -0400
From:	Shea Levy <shea@...alevy.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Shea Levy <shea@...alevy.com>
Subject: [PATCH 0/2] vfs: Report a mount r/o if the superblock is

By calling mount(2) with MS_REMOUNT | MS_BIND on a non-bind readonly
mountpoint, it is possible to have a readonly mount without MNT_READONLY
in its mnt_flags. Currently, /proc/<pid>/mountinfo and statfs will
report such a mount as r/w, even though for all intents and purposes it
is still readonly.

This patchset fixes show_mountinfo and statfs to report such mounts as
readonly.

Signed-off-by: Shea Levy <shea@...alevy.com>

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