linux-ext4 - Re: 答复: [RFC PATCH] ext4: add link file support for {GET,SET}XATTR ioctl

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Message-ID: <20190214155410.GF32253@magnolia>
Date:   Thu, 14 Feb 2019 07:54:10 -0800
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Wang Shilong <wshilong@....com>
Cc:     Dave Chinner <david@...morbit.com>,
        Wang Shilong <wangshilong1991@...il.com>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        "linux-fs@...r.kernel.org" <linux-fs@...r.kernel.org>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        Andreas Dilger <adilger@...ger.ca>, Li Xi <lixi@....com>
Subject: Re: 答复: [RFC PATCH] ext4: add link
 file support for {GET,SET}XATTR ioctl

On Thu, Feb 14, 2019 at 08:14:56AM +0000, Wang Shilong wrote:
> Hi Dave, Darrick,
> 
>       Thanks for good suggestions!
> As my understanding, we could modify 
> 
> do_fchownat() to change project ID instead of
> group id if AT_FCHOWN_PROJID(new flags) passed in.
> 
> Besides that we also need a new flag AT_FCHOWN_PROJ_INHERIT.
> to set/clear inherit attributes? 

That sounds reasonable enough to consider as a formal proposal.

> And for Project Get, we might need extend 'struct attr {'
> to include project id.

Let's add a new STATX_PROJID so that statx() callers can fetch it?

Also manpage updates and fstests cases...

--D

> What do you think?
> 
> Thanks,
> Shilong