From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63B5AC10F13 for ; Tue, 16 Apr 2019 23:09:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F8852075B for ; Tue, 16 Apr 2019 23:09:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728636AbfDPXJI (ORCPT ); Tue, 16 Apr 2019 19:09:08 -0400 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:47708 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727382AbfDPXJI (ORCPT ); Tue, 16 Apr 2019 19:09:08 -0400 Received: from callcc.thunk.org (guestnat-104-133-0-109.corp.google.com [104.133.0.109] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id x3GN8evq017669 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 16 Apr 2019 19:08:41 -0400 Received: by callcc.thunk.org (Postfix, from userid 15806) id 3DC7F420497; Tue, 16 Apr 2019 19:08:40 -0400 (EDT) Date: Tue, 16 Apr 2019 19:08:40 -0400 From: "Theodore Ts'o" To: Eric Biggers Cc: linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, linux-unionfs@vger.kernel.org, Sarthak Kukreti , Gao Xiang Subject: Re: [PATCH v2 1/5] fscrypt: clean up and improve dentry revalidation Message-ID: <20190416230840.GB14623@mit.edu> References: <20190320183913.12686-1-ebiggers@kernel.org> <20190320183913.12686-2-ebiggers@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190320183913.12686-2-ebiggers@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Wed, Mar 20, 2019 at 11:39:09AM -0700, Eric Biggers wrote: > From: Eric Biggers > > Make various improvements to fscrypt dentry revalidation: > > - Don't try to handle the case where the per-directory key is removed, > as this can't happen without the inode (and dentries) being evicted. > > - Flag ciphertext dentries rather than plaintext dentries, since it's > ciphertext dentries that need the special handling. > > - Avoid doing unnecessary work for non-ciphertext dentries. > > - When revalidating ciphertext dentries, try to set up the directory's > i_crypt_info to make sure the key is really still absent, rather than > invalidating all negative dentries as the previous code did. An old > comment suggested we can't do this for locking reasons, but AFAICT > this comment was outdated and it actually works fine. > > Signed-off-by: Eric Biggers Looks good, applied. - Ted