linux-kernel - Re: [PATCH review 07/16] xfs: Update ioctl(XFS_IOC_FREE_EOFBLOCKS) to handle callers in any userspace

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Date:	Tue, 19 Feb 2013 12:48:40 +1100
From:	Dave Chinner <david@...morbit.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	linux-fsdevel@...r.kernel.org,
	Linux Containers <containers@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org, "Serge E. Hallyn" <serge@...lyn.com>,
	Ben Myers <bpm@....com>, Alex Elder <elder@...nel.org>
Subject: Re: [PATCH review 07/16] xfs: Update ioctl(XFS_IOC_FREE_EOFBLOCKS)
 to handle callers in any userspace

On Sun, Feb 17, 2013 at 05:11:00PM -0800, Eric W. Biederman wrote:
> From: "Eric W. Biederman" <ebiederm@...ssion.com>
> 
> - Modify the ioctl to convert from uids, gid, and projids in the
>   current user namespace to kuids, kgids, and kprojids, and to report
>   an error if the conversion fails.

Please just convert to xfs_dqid_t at the interface.

> - Create struct xfs_internal_eofblocks to hold the same information as
>   struct xfs_eofblocks but with uids, gids, and projids stored as
>   kuids, kgids, and kprojids preventing confusion.

No need. Just convert the struct xfs_eof_blocks to define them all
as xfs_dqid_t and convert them in place to the type that is
compatible with the XFS core use of these fields (i.e. comparing
them with the on-disk inode uid/gid/prid values).

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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