Re: [PATCH v3] ext4: move ext4_ind_migrate() into migrate.c

[Zheng Liu <gnehzuil.liu@gmail.com>]

On Tue, Apr 09, 2013 at 12:10:56PM +0200, Lukas Czerner wrote:
> Move ext4_ind_migrate() into migrate.c file since it makes much more
> sense and ext4_ext_migrate() is there as well.
> 
> Signed-off-by: Lukas Czerner <lczerner@redhat.com>

The patch looks good to me.  But it seems that you forgot to add
bigalloc check.  IIRC, that patch hasn't be applied.

Regards,
                                                - Zheng

> ---
>  fs/ext4/ext4.h    |    2 +-
>  fs/ext4/extents.c |   59 ----------------------------------------------------
>  fs/ext4/migrate.c |   60 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
>  3 files changed, 60 insertions(+), 61 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index a0637e5..bb56920 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -2131,6 +2131,7 @@ extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
>  
>  /* migrate.c */
>  extern int ext4_ext_migrate(struct inode *);
> +extern int ext4_ind_migrate(struct inode *inode);
>  
>  /* namei.c */
>  extern int ext4_dirent_csum_verify(struct inode *inode,
> @@ -2620,7 +2621,6 @@ extern int ext4_find_delalloc_range(struct inode *inode,
>  extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
>  extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
>  			__u64 start, __u64 len);
> -extern int ext4_ind_migrate(struct inode *inode);
>  
>  
>  /* move_extent.c */
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 6c5a70a..3645357 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -4715,62 +4715,3 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
>  
>  	return error;
>  }
> -
> -/*
> - * Migrate a simple extent-based inode to use the i_blocks[] array
> - */
> -int ext4_ind_migrate(struct inode *inode)
> -{
> -	struct ext4_extent_header	*eh;
> -	struct ext4_super_block		*es = EXT4_SB(inode->i_sb)->s_es;
> -	struct ext4_inode_info		*ei = EXT4_I(inode);
> -	struct ext4_extent		*ex;
> -	unsigned int			i, len;
> -	ext4_fsblk_t			blk;
> -	handle_t			*handle;
> -	int				ret;
> -
> -	if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> -				       EXT4_FEATURE_INCOMPAT_EXTENTS) ||
> -	    (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
> -		return -EINVAL;
> -
> -	down_write(&EXT4_I(inode)->i_data_sem);
> -	ret = ext4_ext_check_inode(inode);
> -	if (ret)
> -		goto errout;
> -
> -	eh = ext_inode_hdr(inode);
> -	ex  = EXT_FIRST_EXTENT(eh);
> -	if (ext4_blocks_count(es) > EXT4_MAX_BLOCK_FILE_PHYS ||
> -	    eh->eh_depth != 0 || eh->eh_entries > 1) {
> -		ret = -EOPNOTSUPP;
> -		goto errout;
> -	}
> -	if (eh->eh_entries == 0)
> -		blk = len = 0;
> -	else {
> -		len = le16_to_cpu(ex->ee_len);
> -		blk = ext4_ext_pblock(ex);
> -		if (len > EXT4_NDIR_BLOCKS) {
> -			ret = -EOPNOTSUPP;
> -			goto errout;
> -		}
> -	}
> -
> -	handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
> -	if (IS_ERR(handle)) {
> -		ret = PTR_ERR(handle);
> -		goto errout;
> -	}
> -
> -	ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
> -	memset(ei->i_data, 0, sizeof(ei->i_data));
> -	for (i=0; i < len; i++)
> -		ei->i_data[i] = cpu_to_le32(blk++);
> -	ext4_mark_inode_dirty(handle, inode);
> -	ext4_journal_stop(handle);
> -errout:
> -	up_write(&EXT4_I(inode)->i_data_sem);
> -	return ret;
> -}
> diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
> index 480acf4..3464604 100644
> --- a/fs/ext4/migrate.c
> +++ b/fs/ext4/migrate.c
> @@ -426,7 +426,6 @@ static int free_ext_block(handle_t *handle, struct inode *inode)
>  			return retval;
>  	}
>  	return retval;
> -
>  }
>  
>  int ext4_ext_migrate(struct inode *inode)
> @@ -606,3 +605,62 @@ out:
>  
>  	return retval;
>  }
> +
> +/*
> + * Migrate a simple extent-based inode to use the i_blocks[] array
> + */
> +int ext4_ind_migrate(struct inode *inode)
> +{
> +	struct ext4_extent_header	*eh;
> +	struct ext4_super_block		*es = EXT4_SB(inode->i_sb)->s_es;
> +	struct ext4_inode_info		*ei = EXT4_I(inode);
> +	struct ext4_extent		*ex;
> +	unsigned int			i, len;
> +	ext4_fsblk_t			blk;
> +	handle_t			*handle;
> +	int				ret;
> +
> +	if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> +				       EXT4_FEATURE_INCOMPAT_EXTENTS) ||
> +	    (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
> +		return -EINVAL;
> +
> +	down_write(&EXT4_I(inode)->i_data_sem);
> +	ret = ext4_ext_check_inode(inode);
> +	if (ret)
> +		goto errout;
> +
> +	eh = ext_inode_hdr(inode);
> +	ex  = EXT_FIRST_EXTENT(eh);
> +	if (ext4_blocks_count(es) > EXT4_MAX_BLOCK_FILE_PHYS ||
> +	    eh->eh_depth != 0 || eh->eh_entries > 1) {
> +		ret = -EOPNOTSUPP;
> +		goto errout;
> +	}
> +	if (eh->eh_entries == 0)
> +		blk = len = 0;
> +	else {
> +		len = le16_to_cpu(ex->ee_len);
> +		blk = ext4_ext_pblock(ex);
> +		if (len > EXT4_NDIR_BLOCKS) {
> +			ret = -EOPNOTSUPP;
> +			goto errout;
> +		}
> +	}
> +
> +	handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
> +	if (IS_ERR(handle)) {
> +		ret = PTR_ERR(handle);
> +		goto errout;
> +	}
> +
> +	ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
> +	memset(ei->i_data, 0, sizeof(ei->i_data));
> +	for (i = 0; i < len; i++)
> +		ei->i_data[i] = cpu_to_le32(blk++);
> +	ext4_mark_inode_dirty(handle, inode);
> +	ext4_journal_stop(handle);
> +errout:
> +	up_write(&EXT4_I(inode)->i_data_sem);
> +	return ret;
> +}
> -- 
> 1.7.7.6
>