Re: [PATCH v4 11/11] NFS: replace cross device check in copy_file_range

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On Sat, Oct 27, 2018 at 07:08:11AM -0400, Jeff Layton wrote:
> >  
> > -	if (file_in->f_inode->i_sb != file_out->f_inode->i_sb)
> > +	if (file_in->f_op != &nfs4_file_operations)
> >  		return -EXDEV;
> > +	else {
> 
> nit: you don't really need the "else" here since the previous block
> returns
> 
> > +		struct nfs_client *c_in =
> > +			(NFS_SERVER(file_inode(file_in)))->nfs_client;
> > +		if (c_in->cl_minorversion < 2)
> > +			return -EXDEV;
> > +	}

Yeah, but if you don't have the else, then you need to declare the c_in
at the beginning of the function instead of in the new block.  Mind you,
if you do that then:

	c_in = NFS_SERVER(file_inode(file_in))->nfs_client;

fits on one line, so it does look a bit neater.



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