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From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 15/27] xfs: reshuffle dir2 definitions around for userspace
Date: Wed, 19 Jun 2013 07:35:05 +1000	[thread overview]
Message-ID: <20130618213505.GX29338@dastard> (raw)
In-Reply-To: <20130618211256.GW29338@dastard>

On Wed, Jun 19, 2013 at 07:12:57AM +1000, Dave Chinner wrote:
> On Mon, Jun 17, 2013 at 09:05:15AM -0700, Christoph Hellwig wrote:
> > On Wed, Jun 12, 2013 at 08:22:35PM +1000, Dave Chinner wrote:
> > > From: Dave Chinner <dchinner@redhat.com>
> > > 
> > > Many of the definitions within xfs_dir2_priv.h are needed in
> > > userspace outside libxfs. Definitions within xfs_dir2_priv.h are
> > > wholly contained within libxfs, so we need to shuffle some of the
> > > definitions around to keep consistency across files shared between
> > > user and kernel space.
> > 
> > I created the xfs_dir2_format.h header so that it would be self
> > contained.  Despite not mentioning it in the description this patch
> > also moves typedefs out of xfs_dir2_format.h which is something I'd
> > rather avoid.  Where in userspace would we need these defintions but
> > can't include xfs_dir2_format.h?
> 
> They are needed by the declarations of the public dir2 functions
> used by userspace. i.e. they aren't just on-disk format definitions
> - they are API definitions as well.
> 
> This was one of the problems I had with the previous libxfs/kernel
> sync - converting all the userspace code to use xfs_dir2_format.h.
> I had no idea exactly how you intended to structure the usrespace
> code, and so I was really flying blind.
> 
> The separation of dir2.h/format.h/priv.h is fine from the kernel
> side, but I found that a significant number of functions declared in
> xfs_dir2_priv.h are actually public functions in userspace and so
> need to be in xfs_dir2.h, not xfs_dir2_priv.h. And then that
> requires the definitions from xfs_fir2_format.h for the function
> prototypes in xfs_dir2.h....
> 
> Having just done all the other __KERNEL__ changes, I see this
> dir2 change in a different light now. I can probably rework the
> userspace includes to include xfs_dir2_format.h before xfs_dir2.h
> and hence remove the need to modify xfs_dir2_format.h...

Yes, it can. The problem was that xfs_dir2_format.h requires the
definition of struct xfs_mount (due to static inline functions),
but there are no such restrictions on xfs_dir2.h so it can be moved
to after the include for xfs_dir2_format.h.

Ok, so xfs_dir2_format.h doesn't need to change.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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  reply	other threads:[~2013-06-18 21:35 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-12 10:22 [PATCH 00/27] xfs: current patch queue for 3.11 Dave Chinner
2013-06-12 10:22 ` [PATCH 01/27] xfs: update mount options documentation Dave Chinner
2013-06-13 13:34   ` Eric Sandeen
2013-06-14  0:40     ` Dave Chinner
2013-06-14  0:53       ` Eric Sandeen
2013-06-12 10:22 ` [PATCH 02/27] xfs: add pluging for bulkstat readahead Dave Chinner
2013-06-12 10:22 ` [PATCH 03/27] xfs: plug directory buffer readahead Dave Chinner
2013-06-12 10:22 ` [PATCH 04/27] xfs: don't use speculative prealloc for small files Dave Chinner
2013-06-12 16:10   ` Brian Foster
2013-06-13  0:50     ` Dave Chinner
2013-06-12 10:22 ` [PATCH 05/27] xfs: don't do IO when creating an new inode Dave Chinner
2013-06-12 10:22 ` [PATCH 06/27] xfs: xfs_ifree doesn't need to modify the inode buffer Dave Chinner
2013-06-12 10:22 ` [PATCH 07/27] xfs: Introduce ordered log vector support Dave Chinner
2013-06-12 10:22 ` [PATCH 08/27] xfs: Introduce an ordered buffer item Dave Chinner
2013-06-12 10:22 ` [PATCH 09/27] xfs: Inode create log items Dave Chinner
2013-06-12 10:22 ` [PATCH 10/27] xfs: Inode create transaction reservations Dave Chinner
2013-06-12 10:22 ` [PATCH 11/27] xfs: Inode create item recovery Dave Chinner
2013-06-12 10:22 ` [PATCH 12/27] xfs: Use inode create transaction Dave Chinner
2013-06-12 10:22 ` [PATCH 13/27] xfs: remove local fork format handling from xfs_bmapi_write() Dave Chinner
2013-06-12 10:22 ` [PATCH 14/27] xfs: move getdents code into it's own file Dave Chinner
2013-06-12 10:22 ` [PATCH 15/27] xfs: reshuffle dir2 definitions around for userspace Dave Chinner
2013-06-17 16:05   ` Christoph Hellwig
2013-06-18 21:12     ` Dave Chinner
2013-06-18 21:35       ` Dave Chinner [this message]
2013-06-12 10:22 ` [PATCH 16/27] xfs: split out attribute listing code into separate file Dave Chinner
2013-06-12 10:22 ` [PATCH 17/27] xfs: split out attribute fork truncation " Dave Chinner
2013-06-12 10:22 ` [PATCH 18/27] xfs: split out xfs inode operations " Dave Chinner
2013-06-12 14:05   ` Christoph Hellwig
2013-06-13  1:14     ` Dave Chinner
2013-06-13  8:00       ` Dave Chinner
2013-06-17 15:56         ` Christoph Hellwig
2013-06-17 18:14           ` Ben Myers
2013-06-18 20:40             ` Dave Chinner
2013-06-18 21:37               ` Ben Myers
2013-06-18 22:02                 ` Dave Chinner
2013-06-12 10:22 ` [PATCH 19/27] xfs: consolidate xfs_vnodeops.c into xfs_inode_ops.c Dave Chinner
2013-06-12 13:59   ` Christoph Hellwig
2013-06-13  1:39     ` Dave Chinner
2013-06-17 16:02       ` Christoph Hellwig
2013-06-18 20:55         ` Dave Chinner
2013-06-12 10:22 ` [PATCH 20/27] xfs: move xfs_getbmap to xfs_extent_ops.c Dave Chinner
2013-06-12 10:22 ` [PATCH 21/27] xfs: introduce xfs_sb.c for sharing with libxfs Dave Chinner
2013-06-12 10:22 ` [PATCH 22/27] xfs: move xfs_trans_reservations to xfs_trans.h Dave Chinner
2013-06-12 10:22 ` [PATCH 23/27] xfs: sync minor header differences needed by userspace Dave Chinner
2013-06-12 10:22 ` [PATCH 24/27] xfs: move xfs_bmap_punch_delalloc() to xfs_aops.c Dave Chinner
2013-06-12 14:06   ` Christoph Hellwig
2013-06-13  1:39     ` Dave Chinner
2013-06-12 10:22 ` [PATCH 25/27] xfs: split out transaction reservation code Dave Chinner
2013-06-12 10:22 ` [PATCH 26/27] xfs: minor cleanups Dave Chinner
2013-06-12 10:22 ` [PATCH 27/27] xfs: fix issues that cause userspace warnings Dave Chinner
2013-06-17 19:32   ` Brian Foster
2013-06-18 21:42     ` Dave Chinner
2013-06-12 13:06 ` [PATCH 00/27] xfs: current patch queue for 3.11 Brian Foster
2013-06-13  1:40   ` Dave Chinner
2013-06-12 14:17 ` Ben Myers
2013-06-13  1:58   ` Dave Chinner

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