From: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Date: Fri, 22 Apr 2011 18:08:00 +0000 (-0500)
Subject: eCryptfs: Flush dirty pages in setattr
X-Git-Tag: v2.6.39-rc5~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5be79de2e1ffa19d871a494697cf76cddee93384;p=pandora-kernel.git

eCryptfs: Flush dirty pages in setattr

After 57db4e8d73ef2b5e94a3f412108dff2576670a8a changed eCryptfs to
write-back caching, eCryptfs page writeback updates the lower inode
times due to the use of vfs_write() on the lower file.

To preserve inode metadata changes, such as 'cp -p' does with
utimensat(), we need to flush all dirty pages early in
ecryptfs_setattr() so that the user-updated lower inode metadata isn't
clobbered later in writeback.

https://bugzilla.kernel.org/show_bug.cgi?id=33372

Reported-by: Rocko <rockorequin@hotmail.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
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