Commit e2cf1f1c authored by David Howells's avatar David Howells
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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: default avatarDavid Howells <dhowells@redhat.com>
parent 696382f9

fs/cachefiles/namei.c

+2 −1
Original line number Diff line number Diff line
@@ -779,7 +779,8 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache, 
	    !subdir->d_inode->i_op->lookup ||

	    !subdir->d_inode->i_op->mkdir ||

	    !subdir->d_inode->i_op->create ||

	    !subdir->d_inode->i_op->rename ||

	    (!subdir->d_inode->i_op->rename &&

	     !subdir->d_inode->i_op->rename2) ||

	    !subdir->d_inode->i_op->rmdir ||

	    !subdir->d_inode->i_op->unlink)

		goto check_error;

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