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Re: [Cluster-devel] [GFS2 PATCH] gfs2: move function foreach_leaf to gfs2_dir_exhash_dealloc



Hi,

Ah, I see. I should have read this patch before replying to the
first :-) This patch set looks very good. I'll push them into -nmw just
as soon as -rc1 is out,

Steve.

On Tue, 2011-03-22 at 13:56 -0400, Bob Peterson wrote:
> Hi,
> 
> gfs2: move function foreach_leaf to gfs2_dir_exhash_dealloc
> 
> The previous patches made function gfs2_dir_exhash_dealloc do nothing
> but call function foreach_leaf.  This patch simplifies the code by
> moving the entire function foreach_leaf into gfs2_dir_exhash_dealloc.
> 
> Regards,
> 
> Bob Peterson
> Red Hat File Systems
> 
> Signed-off-by: Bob Peterson <rpeterso redhat com> 
> --
> diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
> index 4a925a7..13e7faa 100644
> --- a/fs/gfs2/dir.c
> +++ b/fs/gfs2/dir.c
> @@ -85,10 +85,6 @@ struct qstr gfs2_qdotdot __read_mostly;
>  typedef int (*gfs2_dscan_t)(const struct gfs2_dirent *dent,
>  			    const struct qstr *name, void *opaque);
>  
> -static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
> -			u64 leaf_no, struct buffer_head *leaf_bh,
> -			int last_dealloc);
> -
>  int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
>  			    struct buffer_head **bhp)
>  {
> @@ -1769,81 +1765,6 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
>  }
>  
>  /**
> - * foreach_leaf - call a function for each leaf in a directory
> - * @dip: the directory
> - *
> - * Returns: errno
> - */
> -
> -static int foreach_leaf(struct gfs2_inode *dip)
> -{
> -	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
> -	struct buffer_head *bh;
> -	struct gfs2_leaf *leaf;
> -	u32 hsize, len;
> -	u32 ht_offset, lp_offset, ht_offset_cur = -1;
> -	u32 index = 0, next_index;
> -	__be64 *lp;
> -	u64 leaf_no;
> -	int error = 0, last;
> -
> -	hsize = 1 << dip->i_depth;
> -	if (hsize * sizeof(u64) != i_size_read(&dip->i_inode)) {
> -		gfs2_consist_inode(dip);
> -		return -EIO;
> -	}
> -
> -	lp = kmalloc(sdp->sd_hash_bsize, GFP_NOFS);
> -	if (!lp)
> -		return -ENOMEM;
> -
> -	while (index < hsize) {
> -		lp_offset = index & (sdp->sd_hash_ptrs - 1);
> -		ht_offset = index - lp_offset;
> -
> -		if (ht_offset_cur != ht_offset) {
> -			error = gfs2_dir_read_data(dip, (char *)lp,
> -						ht_offset * sizeof(__be64),
> -						sdp->sd_hash_bsize, 1);
> -			if (error != sdp->sd_hash_bsize) {
> -				if (error >= 0)
> -					error = -EIO;
> -				goto out;
> -			}
> -			ht_offset_cur = ht_offset;
> -		}
> -
> -		leaf_no = be64_to_cpu(lp[lp_offset]);
> -		if (leaf_no) {
> -			error = get_leaf(dip, leaf_no, &bh);
> -			if (error)
> -				goto out;
> -			leaf = (struct gfs2_leaf *)bh->b_data;
> -			len = 1 << (dip->i_depth - be16_to_cpu(leaf->lf_depth));
> -			next_index = (index & ~(len - 1)) + len;
> -			last = ((next_index >= hsize) ? 1 : 0);
> -			error = leaf_dealloc(dip, index, len, leaf_no, bh,
> -					     last);
> -			brelse(bh);
> -			if (error)
> -				goto out;
> -			index = next_index;
> -		} else
> -			index++;
> -	}
> -
> -	if (index != hsize) {
> -		gfs2_consist_inode(dip);
> -		error = -EIO;
> -	}
> -
> -out:
> -	kfree(lp);
> -
> -	return error;
> -}
> -
> -/**
>   * leaf_dealloc - Deallocate a directory leaf
>   * @dip: the directory
>   * @index: the hash table offset in the directory
> @@ -1988,8 +1909,71 @@ out:
>  
>  int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip)
>  {
> -	/* Dealloc on-disk leaves to FREEMETA state */
> -	return foreach_leaf(dip);
> +	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
> +	struct buffer_head *bh;
> +	struct gfs2_leaf *leaf;
> +	u32 hsize, len;
> +	u32 ht_offset, lp_offset, ht_offset_cur = -1;
> +	u32 index = 0, next_index;
> +	__be64 *lp;
> +	u64 leaf_no;
> +	int error = 0, last;
> +
> +	hsize = 1 << dip->i_depth;
> +	if (hsize * sizeof(u64) != i_size_read(&dip->i_inode)) {
> +		gfs2_consist_inode(dip);
> +		return -EIO;
> +	}
> +
> +	lp = kmalloc(sdp->sd_hash_bsize, GFP_NOFS);
> +	if (!lp)
> +		return -ENOMEM;
> +
> +	while (index < hsize) {
> +		lp_offset = index & (sdp->sd_hash_ptrs - 1);
> +		ht_offset = index - lp_offset;
> +
> +		if (ht_offset_cur != ht_offset) {
> +			error = gfs2_dir_read_data(dip, (char *)lp,
> +						ht_offset * sizeof(__be64),
> +						sdp->sd_hash_bsize, 1);
> +			if (error != sdp->sd_hash_bsize) {
> +				if (error >= 0)
> +					error = -EIO;
> +				goto out;
> +			}
> +			ht_offset_cur = ht_offset;
> +		}
> +
> +		leaf_no = be64_to_cpu(lp[lp_offset]);
> +		if (leaf_no) {
> +			error = get_leaf(dip, leaf_no, &bh);
> +			if (error)
> +				goto out;
> +			leaf = (struct gfs2_leaf *)bh->b_data;
> +			len = 1 << (dip->i_depth - be16_to_cpu(leaf->lf_depth));
> +
> +			next_index = (index & ~(len - 1)) + len;
> +			last = ((next_index >= hsize) ? 1 : 0);
> +			error = leaf_dealloc(dip, index, len, leaf_no, bh,
> +					     last);
> +			brelse(bh);
> +			if (error)
> +				goto out;
> +			index = next_index;
> +		} else
> +			index++;
> +	}
> +
> +	if (index != hsize) {
> +		gfs2_consist_inode(dip);
> +		error = -EIO;
> +	}
> +
> +out:
> +	kfree(lp);
> +
> +	return error;
>  }
>  
>  /**
> 



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