From: Dave Hansen <haveblue@us.ibm.com>
Date: Fri, 15 Feb 2008 22:37:56 +0000 (-0800)
Subject: [PATCH] r/o bind mounts: check mnt instead of superblock directly
X-Git-Tag: v2.6.26-rc1~1134^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c463e95480829a2fe8f386589516e13b1289db6;p=pandora-kernel.git

[PATCH] r/o bind mounts: check mnt instead of superblock directly

If we depend on the inodes for writeability, we will not catch the r/o mounts
when implemented.

This patches uses __mnt_want_write().  It does not guarantee that the mount
will stay writeable after the check.  But, this is OK for one of the checks
because it is just for a printk().

The other two are probably unnecessary and duplicate existing checks in the
VFS.  This won't make them better checks than before, but it will make them
detect r/o mounts.

Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

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