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From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v3 13/39] fs: introduce a get_qsize() to inode_operations
Date: Sat, 3 Oct 2015 23:33:57 -0700
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To: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
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On Tue, Sep 15, 2015 at 05:02:08PM +0800, Dongsheng Yang wrote:
> get_qsize() is used to allow inode to decide how much of the quota size
> in itself. If file system implements the own get_qsize(), ioctl of
> FIOQSIZe will call it to get quota size. If not implemented, get the
> quota size in a generic way.

This should be in struct dquot_operations.