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Date: Fri, 13 Dec 2013 08:37:33 -0800
From: Christoph Hellwig <hch@infradead.org>
To: Zhi Yong Wu <zwu.kernel@gmail.com>
Cc: xfs@oss.sgi.com, linux-fsdevel@vger.kernel.org,
        Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/5] xfs: add xfs_create_tmpfile() for O_TMPFILE support
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> +	error = xfs_dir_ialloc(&tp, NULL, mode, 0, rdev,

please pass the parent inode pointer here.

> +				XFS_PROJID_DEFAULT, resblks > 0,

and pass the project id that you inherited from the parent here.