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From: Carlos Maiolino <cmaiolino@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-fsdevel@vger.kernel.org, adilger@dilger.ca,
	sandeen@redhat.com, david@fromorbit.com
Subject: Re: [PATCH 04/10 V2] fibmap: Use bmap instead of ->bmap method in ioctl_fibmap
Date: Mon, 4 Feb 2019 12:34:08 +0100	[thread overview]
Message-ID: <20190204113408.rhp7ga2bp7mskls3@hades.usersys.redhat.com> (raw)
In-Reply-To: <20190114164902.GA7187@lst.de>

Hi Christoph. Sorry for the delayed reply.

> > +	error = get_user(usr_blk, p);
> > +	if (error)
> > +		return error;
> 
> Does get_user/put_user actually return an error?
> 
> All the code I know just does:
> 
> 	if (get_user()))
> 		return -EFAULT;
> 
> and co.

According to the comment above it, it either returns zero on success, or -EFAULT
on error. So, both approaches are correct, either mine, or the one you
mentioned. It just seems more logical to me, to return whatever error code
returned by the function (well, macro), instead of hardcoding -EFAULT.

> 
> > +
> > +	block = usr_blk;
> > +	error = bmap(inode, &block);
> > +	if (error)
> > +		return error;
> > +	usr_blk = block;
> 
> Nitpick: maybe i'd name ur_block block and block sector, which seems
> to flow a little better.

Sure, it's ok for me, I'll change that on a V3
> 

-- 
Carlos

  reply	other threads:[~2019-02-04 11:34 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-05  9:17 [PATCH 00/10 V2] New ->fiemap infrastructure and ->bmap removal Carlos Maiolino
2018-12-05  9:17 ` [PATCH 01/10] fs: Enable bmap() function to properly return errors Carlos Maiolino
2018-12-05  9:17 ` [PATCH 02/10] cachefiles: drop direct usage of ->bmap method Carlos Maiolino
2018-12-05  9:17 ` [PATCH 03/10] ecryptfs: drop direct calls to ->bmap Carlos Maiolino
2018-12-05  9:17 ` [PATCH 04/10 V2] fibmap: Use bmap instead of ->bmap method in ioctl_fibmap Carlos Maiolino
2019-01-14 16:49   ` Christoph Hellwig
2019-02-04 11:34     ` Carlos Maiolino [this message]
2018-12-05  9:17 ` [PATCH 05/10] fs: Move start and length fiemap fields into fiemap_extent_info Carlos Maiolino
2019-01-14 16:50   ` Christoph Hellwig
2018-12-05  9:17 ` [PATCH 06/10] iomap: Remove length and start fields from iomap_fiemap Carlos Maiolino
2019-01-14 16:51   ` Christoph Hellwig
2018-12-05  9:17 ` [PATCH 07/10] fs: Use a void pointer to store fiemap_extent Carlos Maiolino
2019-01-14 16:53   ` Christoph Hellwig
2018-12-05  9:17 ` [PATCH 08/10 V2] fiemap: Use a callback to fill fiemap extents Carlos Maiolino
2019-01-14 16:53   ` Christoph Hellwig
2018-12-05  9:17 ` [PATCH 09/10 V2] Use FIEMAP for FIBMAP calls Carlos Maiolino
2018-12-05 17:36   ` Darrick J. Wong
2018-12-07  9:09     ` Carlos Maiolino
2018-12-07 20:14       ` Andreas Dilger
2019-02-04 15:11     ` Carlos Maiolino
2019-02-04 18:27       ` Darrick J. Wong
2019-02-06 13:37         ` Carlos Maiolino
2019-02-06 20:44           ` Darrick J. Wong
2019-02-06 21:13             ` Andreas Dilger
2019-02-07  9:52               ` Carlos Maiolino
2019-02-08  8:43                 ` Christoph Hellwig
2019-02-11 12:57                   ` Christoph Hellwig
2019-02-11 16:21                     ` Carlos Maiolino
2019-02-11 16:48                       ` Christoph Hellwig
2019-02-07 11:59             ` Carlos Maiolino
2019-02-07 17:02               ` Darrick J. Wong
2019-02-07 21:25                 ` Andreas Dilger
2019-02-08  8:46                   ` Christoph Hellwig
2019-02-08 10:36                     ` Carlos Maiolino
2019-02-08 21:03                       ` Andreas Dilger
2019-02-08  9:08                   ` Carlos Maiolino
2019-02-08  9:03                 ` Carlos Maiolino
2019-02-07 12:36             ` Carlos Maiolino
2019-02-07 18:16               ` Darrick J. Wong
2019-02-08  8:58                 ` Carlos Maiolino
2019-02-06 21:04           ` Andreas Dilger
2019-01-14 16:56   ` Christoph Hellwig
2019-02-05  9:56     ` Carlos Maiolino
2019-02-05 18:25       ` Christoph Hellwig
2019-02-06  9:50         ` Carlos Maiolino
2018-12-05  9:17 ` [PATCH 10/10] xfs: Get rid of ->bmap Carlos Maiolino
2018-12-05 17:37   ` Darrick J. Wong
2018-12-06 13:06     ` Carlos Maiolino
2018-12-06 18:56 ` [PATCH 00/10 V2] New ->fiemap infrastructure and ->bmap removal Andreas Grünbacher
2018-12-07  9:34   ` Carlos Maiolino
2019-01-14 16:50     ` Christoph Hellwig
2019-01-14 17:56       ` Andreas Grünbacher
2019-01-14 17:58         ` Christoph Hellwig

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