From mboxrd@z Thu Jan 1 00:00:00 1970 From: Venkateswararao Jujjuri Subject: Re: [LSF/MM TOPIC (expanded) 0/8] New API's for better exporting of VFS from user-mode daemons Date: Mon, 08 Apr 2013 07:31:07 -0700 Message-ID: <5162D4AB.1030109@linux.vnet.ibm.com> References: <516299A5.8030109@panasas.com> Reply-To: jvrao@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Steven Whitehouse , Steve Dickson , Jeff Layton , lsf-pc@lists.linux-foundation.org, linux-fsdevel , Ganesha NFS List , Frank S Filz , "J. Bruce Fields" , "Lieb, Jim" , DENIEL Philippe To: Boaz Harrosh Return-path: Received: from e8.ny.us.ibm.com ([32.97.182.138]:44531 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936162Ab3DHObV (ORCPT ); Mon, 8 Apr 2013 10:31:21 -0400 Received: from /spool/local by e8.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 8 Apr 2013 10:31:19 -0400 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id E056C6E8061 for ; Mon, 8 Apr 2013 10:31:09 -0400 (EDT) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r38EVCMP279616 for ; Mon, 8 Apr 2013 10:31:12 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r38EVAmt031280 for ; Mon, 8 Apr 2013 11:31:11 -0300 In-Reply-To: <516299A5.8030109@panasas.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On 04/08/2013 03:19 AM, Boaz Harrosh wrote: > Hi > > Steven suggested to discuss a readdir-plus system call. For a better LS > but certainly better FS daemons. I have hijacked his topic to expand it > to a slew of requests we, the FS daemons people, would like to see extended, > so to make our lives better (and faster). It should be up to Steven and the > comity if these are grouped together or separated into different talks. > > I would like to send a set of emails. Each below topic in it's own mail. > Any interested party, please post to the topic of your heart so we can collect > all the information,, header files, status of each topic. The LSF talk should be > not for introduction of the topics but for actual decision making. > > Some of the topics already carry, experimental or more, implementations > and suggested APIs. Some of these topics are just a cry for help, we know what > we don't want, and maybe how we would like them, and what we need is from the > community to give us a green light as to if it is wanted at all. > > This is certainly an exhaustive list, we might want to drop some of them, if > they don't generate much interest. Also if I forgot something please post (JV) > > Here is the list of topics in this set: > - [1/8] readdir-plus system call (By Steven Whitehouse ) > - [2/8] Sane locks (UNPOSIX locks) (frank) > - [3/8] File delegations, Usermode API of Bruce's pending patches. > - [4/8] PNFS ioctls/syscall > - [5/8] syscall_cred() a system call that receives alternate creds (fsuid fsgid thread-groups) > - [6/8] Rich ACLs (continued, drive through this time) > - [7/8] Single call interface to getattr/setattr (Frank S Filz ) > - [8/8] Fix fsnotify short comings (single fd with recursive notifications). WCC Provision. User level API need to : getattr() perform operation write/read/something getattr() Breaking this into 3 calls gives all kinds of race possibilities and makes WCC useless. Having one single interface to get all this info atomically will be a great help. > > Thanks > Boaz >