From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Moore Subject: Re: [RFC PATCH 5/5] audit: replace getname()/putname() hacks with reference counters Date: Wed, 14 Jan 2015 16:45:06 -0500 Message-ID: <2531966.CgBBZnoLxq@sifl> References: <20150108164514.11316.85331.stgit@localhost> <20150108165056.11316.83417.stgit@localhost> <20150114213717.GQ29998@madcap2.tricolour.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: linux-audit@redhat.com, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: Richard Guy Briggs Return-path: In-Reply-To: <20150114213717.GQ29998@madcap2.tricolour.ca> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Wednesday, January 14, 2015 04:37:17 PM Richard Guy Briggs wrote: > On 15/01/08, Paul Moore wrote: > > In order to ensure that filenames are not released before the audit > > subsystem is done with the strings there are a number of hacks built > > into the fs and audit subsystems around getname() and putname(). To > > say these hacks are "ugly" would be kind. > > > > This patch removes the filename hackery in favor of a more > > conventional reference count based approach. The diffstat below tells > > most of the story; lots of audit/fs specific code is replaced with a > > traditional reference count based approach that is easily understood, > > even by those not familiar with the audit and/or fs subsystems. > > > > Signed-off-by: Paul Moore > > The only nit I've got is "refcnt" enlarges "struct filename" where I > would have used a bitfield with "separate". > > Otherwise, this looks like an improvement. Thanks. I agree that it is unfortunate that struct filename increases, but it seemed liked a valid tradeoff considering that we got to remove the getname()/putname() hacks in favor of a more traditional approach. As far the int versus bitfield, I suppose I favor the int in this particular case, but if the fs folks want a bitfield I can do that. > Reviewed-by: Richard Guy Briggs Thanks for taking the time to review the patchset. -- paul moore security @ redhat