[Cluster-devel] [GFS2 PATCH] gfs2: move function foreach_leaf to gfs2_dir_exhash_dealloc
Steven Whitehouse
swhiteho at redhat.com
Wed Mar 23 09:38:08 UTC 2011
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 at 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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