From: David Howells <dhowells@redhat.com>
Date: Wed, 17 Sep 2014 22:28:38 +0000 (+0100)
Subject: CacheFiles: Handle rename2
X-Git-Tag: fixes-for-v3.18-merge-window~89^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2cf1f1cc7636bd860e47cd0ad6194da8975f8b5;p=pandora-kernel.git

CacheFiles: Handle rename2

Not all filesystems now provide the rename i_op - ext4 for one - but rather
provide the rename2 i_op.  CacheFiles checks that the filesystem has rename
and so will reject ext4 now with EPERM:

	CacheFiles: Failed to register: -1

Fix this by checking for rename2 as an alternative.  The call to vfs_rename()
actually handles selection of the appropriate function, so we needn't worry
about that.

Turning on debugging shows:

	[cachef] ==> cachefiles_get_directory(,,cache)
	[cachef] subdir -> ffff88000b22b778 positive
	[cachef] <== cachefiles_get_directory() = -1 [check]

where -1 is EPERM.

Signed-off-by: David Howells <dhowells@redhat.com>
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