linux-kernel - Re: [f2fs-dev 3/5] f2fs: Add a new function: f2fs_reserve

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Date:	Mon, 28 Oct 2013 21:28:16 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	Huajun Li <huajun.li.lee@...il.com>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Huajun Li <huajun.li@...el.com>,
	Haicheng Li <haicheng.li@...ux.intel.com>,
	Weihong Xu <weihong.xu@...el.com>
Subject: Re: [f2fs-dev 3/5] f2fs: Add a new function: f2fs_reserve_block()

2013-10-28 (월), 21:16 +0900, Jaegeuk Kim:
Hi,

> 
> 2013-10-26 (토), 00:01 +0800, Huajun Li:
> > From: Huajun Li <huajun.li@...el.com>
> > 
> > Add the function f2fs_reserve_block() to easily reserve new blocks.
> > 
> > Signed-off-by: Huajun Li <huajun.li@...el.com>
> > Signed-off-by: Haicheng Li <haicheng.li@...ux.intel.com>
> > Signed-off-by: Weihong Xu <weihong.xu@...el.com>
> > ---
> >  fs/f2fs/data.c |   29 ++++++++++++++++++-----------
> >  fs/f2fs/f2fs.h |    1 +
> >  2 files changed, 19 insertions(+), 11 deletions(-)
> > 
> > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > index c8887d8..7b31911 100644
> > --- a/fs/f2fs/data.c
> > +++ b/fs/f2fs/data.c
> > @@ -64,6 +64,23 @@ int reserve_new_block(struct dnode_of_data *dn)
> >  	return 0;
> >  }
> >  
> > +int f2fs_reserve_block(struct inode *inode,
> > +		       struct dnode_of_data *dn, pgoff_t index)
> 

We don't need to get dnode_of_data from parameters, since it is
used by this function only.

> 
> > +{
> > +	int err;

+        struct dnode_of_data dn;

> 
> > +
> > +	set_new_dnode(dn, inode, NULL, NULL, 0);
> > +	err = get_dnode_of_data(dn, index, ALLOC_NODE);
> > +	if (err)
> > +		return err;
> > +	if (dn->data_blkaddr == NULL_ADDR)
> > +		err = reserve_new_block(dn);
> > +
> > +	f2fs_put_dnode(dn);
> > +
> > +	return err;
> > +}
> > +
> 

-- 
Jaegeuk Kim
Samsung

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