linux-kernel - Re: [PATCH 2/9] exofs: file and file

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Date:	Wed, 31 Dec 2008 17:36:12 +0200
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	avishay@...il.com, jeff@...zik.org, viro@...IV.linux.org.uk,
	linux-fsdevel@...r.kernel.org, osd-dev@...n-osd.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] exofs: file and file_inode operations

Andrew Morton wrote:
> On Tue, 16 Dec 2008 17:17:25 +0200
> Boaz Harrosh <bharrosh@...asas.com> wrote:
> 
>> implementation of the file_operations and inode_operations for
>> regular data files.
>>
>> Most file_operations are generic vfs implementations except:
>> - exofs_truncate will truncate the OSD object as well
>> - Generic file_fsync is not good for none_bd devices so open code it
>> - The default for .flush in Linux is todo nothing so call exofs_fsync
>>   on the file.
>>
>> ...
>>
>> +int exofs_file_fsync(struct file *filp, struct dentry *dentry, int datasync)
>> +{
>> +	int ret1, ret2;
>> +	struct address_space *mapping = filp->f_mapping;
>> +
>> +	ret1 = filemap_write_and_wait(mapping);
>> +	ret2 = file_fsync(filp, dentry, datasync);
>> +
>> +	return ret1 ? : ret2;
> 
> mutter.  That gccism always makes me fall over dazed and confused. 
> Maybe that's just me.
> 

I've seen it done and felt like you exactly, only I liked the feeling. I'll change
it.

> Did we really want to call file_fsync() if filemap_write_and_wait() failed?
> 

I think it cannot hurt, other places do the same including generic code.

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