linux-ext4 - Re: [PATCH v2 27/28] libext2fs: export inode cahce creation function

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Message-ID: <20131203222249.GG9535@birch.djwong.org>
Date:	Tue, 3 Dec 2013 14:22:49 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	Zheng Liu <gnehzuil.liu@...il.com>
Cc:	linux-ext4@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>,
	Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: [PATCH v2 27/28] libext2fs: export inode cahce creation function

On Tue, Dec 03, 2013 at 08:11:54PM +0800, Zheng Liu wrote:
> From: Zheng Liu <wenqing.lz@...bao.com>
> 
> Currently we have already exported inode cache flush and free functions
> for users.  This commit exports inode cache creation function.  Later
> we will use this function to initialize inode cache and do some unit
> tests for inline data.
> 
> Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
> ---
>  lib/ext2fs/ext2fs.h |    1 +
>  lib/ext2fs/inode.c  |    8 ++++----
>  2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> index bf0ef26..a47bb40 100644
> --- a/lib/ext2fs/ext2fs.h
> +++ b/lib/ext2fs/ext2fs.h
> @@ -1369,6 +1369,7 @@ extern errcode_t ext2fs_get_memalign(unsigned long size,
>  				     unsigned long align, void *ptr);
>  
>  /* inode.c */
> +extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs, int cache_size);
>  extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
>  extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
>  extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
> diff --git a/lib/ext2fs/inode.c b/lib/ext2fs/inode.c
> index 46c1c58..8cf76b0 100644
> --- a/lib/ext2fs/inode.c
> +++ b/lib/ext2fs/inode.c
> @@ -91,7 +91,7 @@ void ext2fs_free_inode_cache(struct ext2_inode_cache *icache)
>  	ext2fs_free_mem(&icache);
>  }
>  
> -static errcode_t create_icache(ext2_filsys fs)
> +errcode_t ext2fs_create_inode_cache(ext2_filsys fs, int cache_size)

cache_size should unsigned int; there's not much point in letting people pass
us a negative size.

Possibly ext2_inode_cache.cache_size should be unsigned too...

--D

>  {
>  	int		i;
>  	errcode_t	retval;
> @@ -109,7 +109,7 @@ static errcode_t create_icache(ext2_filsys fs)
>  
>  	fs->icache->buffer_blk = 0;
>  	fs->icache->cache_last = -1;
> -	fs->icache->cache_size = 4;
> +	fs->icache->cache_size = cache_size;
>  	fs->icache->refcount = 1;
>  	retval = ext2fs_get_array(fs->icache->cache_size,
>  				  sizeof(struct ext2_inode_cache_ent),
> @@ -596,7 +596,7 @@ errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
>  		return EXT2_ET_BAD_INODE_NUM;
>  	/* Create inode cache if not present */
>  	if (!fs->icache) {
> -		retval = create_icache(fs);
> +		retval = ext2fs_create_inode_cache(fs, 4);
>  		if (retval)
>  			return retval;
>  	}
> @@ -732,7 +732,7 @@ errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
>  			}
>  		}
>  	} else {
> -		retval = create_icache(fs);
> +		retval = ext2fs_create_inode_cache(fs, 4);
>  		if (retval)
>  			goto errout;
>  	}
> -- 
> 1.7.9.7
> 
> --
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