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

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Date:   Thu, 14 Feb 2019 08:14:56 +0000
From:   Wang Shilong <wshilong@....com>
To:     Dave Chinner <david@...morbit.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>
CC:     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: 答复: [RFC PATCH] ext4: add link file support for {GET,SET}XATTR ioctl

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? 

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

What do you think?

Thanks,
Shilong