[Cluster-devel] [PATCH] gfs2: Further gfs2_create_inode cleanups

[Andrew Price <anprice@redhat.com>]

On 19/11/2019 22:39, Andreas Gruenbacher wrote:
> Remove a duplicate call to gfs2_set_inode_blocks.  Rename the error labels to a
> consistent scheme to make the function slightly easier to review.

Perhaps there's a better label scheme than failN? It conveys how the 
labels are ordered but it doesn't give any hint at what part of the 
function they jump to, so I don't find that scheme particularly easy to 
work with.

(The removal of the duplicate call can have my Reviewed-by though: I 
checked nothing depends on i_blocks before the second call.)

Andy

> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
> ---
>   fs/gfs2/inode.c | 48 +++++++++++++++++++++++-------------------------
>   1 file changed, 23 insertions(+), 25 deletions(-)
> 
> diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
> index 4a1039c41c69..2a1689621ae1 100644
> --- a/fs/gfs2/inode.c
> +++ b/fs/gfs2/inode.c
> @@ -604,12 +604,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   
>   	error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
>   	if (error)
> -		goto fail;
> +		return error;
>   	gfs2_holder_mark_uninitialized(ghs + 1);
>   
>   	error = create_ok(dip, name, mode);
>   	if (error)
> -		goto fail_gunlock;
> +		goto fail;
>   
>   	inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
>   	error = PTR_ERR(inode);
> @@ -617,7 +617,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   		if (S_ISDIR(inode->i_mode)) {
>   			iput(inode);
>   			inode = ERR_PTR(-EISDIR);
> -			goto fail_gunlock;
> +			goto fail;
>   		}
>   		d_instantiate(dentry, inode);
>   		error = 0;
> @@ -630,33 +630,32 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   		gfs2_glock_dq_uninit(ghs);
>   		return error;
>   	} else if (error != -ENOENT) {
> -		goto fail_gunlock;
> +		goto fail;
>   	}
>   
>   	error = gfs2_diradd_alloc_required(dir, name, &da);
>   	if (error < 0)
> -		goto fail_gunlock;
> +		goto fail;
>   
>   	inode = new_inode(sdp->sd_vfs);
>   	error = -ENOMEM;
>   	if (!inode)
> -		goto fail_gunlock;
> +		goto fail;
>   
>   	error = posix_acl_create(dir, &mode, &default_acl, &acl);
>   	if (error)
> -		goto fail_gunlock;
> +		goto fail;
>   
>   	ip = GFS2_I(inode);
>   	error = gfs2_rsqa_alloc(ip);
>   	if (error)
> -		goto fail_free_acls;
> +		goto fail2;
>   
>   	inode->i_mode = mode;
>   	set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
>   	inode->i_rdev = dev;
>   	inode->i_size = size;
>   	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
> -	gfs2_set_inode_blocks(inode, 1);
>   	munge_mode_uid_gid(dip, inode);
>   	check_and_update_goal(dip);
>   	ip->i_goal = dip->i_goal;
> @@ -696,23 +695,23 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   
>   	error = alloc_dinode(ip, aflags, &blocks);
>   	if (error)
> -		goto fail_free_inode;
> +		goto fail3;
>   
>   	gfs2_set_inode_blocks(inode, blocks);
>   
>   	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
>   	if (error)
> -		goto fail_free_inode;
> +		goto fail3;
>   	flush_delayed_work(&ip->i_gl->gl_work);
>   	glock_set_object(ip->i_gl, ip);
>   
>   	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
>   	if (error)
> -		goto fail_free_inode;
> +		goto fail3;
>   
>   	error = gfs2_trans_begin(sdp, blocks, 0);
>   	if (error)
> -		goto fail_free_inode;
> +		goto fail3;
>   
>   	if (blocks > 1) {
>   		ip->i_eattr = ip->i_no_addr + 1;
> @@ -723,13 +722,13 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   
>   	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
>   	if (error)
> -		goto fail_free_inode;
> +		goto fail3;
>   
>   	BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
>   
>   	error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
>   	if (error)
> -		goto fail_gunlock2;
> +		goto fail4;
>   
>   	glock_set_object(ip->i_iopen_gh.gh_gl, ip);
>   	gfs2_set_iop(inode);
> @@ -741,14 +740,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   	if (default_acl) {
>   		error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
>   		if (error)
> -			goto fail_gunlock3;
> +			goto fail5;
>   		posix_acl_release(default_acl);
>   		default_acl = NULL;
>   	}
>   	if (acl) {
>   		error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
>   		if (error)
> -			goto fail_gunlock3;
> +			goto fail5;
>   		posix_acl_release(acl);
>   		acl = NULL;
>   	}
> @@ -756,11 +755,11 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   	error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
>   					     &gfs2_initxattrs, NULL);
>   	if (error)
> -		goto fail_gunlock3;
> +		goto fail5;
>   
>   	error = link_dinode(dip, name, ip, &da);
>   	if (error)
> -		goto fail_gunlock3;
> +		goto fail5;
>   
>   	mark_inode_dirty(inode);
>   	d_instantiate(dentry, inode);
> @@ -776,22 +775,22 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   	gfs2_glock_put(io_gl);
>   	return error;
>   
> -fail_gunlock3:
> +fail5:
>   	glock_clear_object(io_gl, ip);
>   	gfs2_glock_dq_uninit(&ip->i_iopen_gh);
> -fail_gunlock2:
> +fail4:
>   	clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
>   	gfs2_glock_put(io_gl);
> -fail_free_inode:
> +fail3:
>   	if (ip->i_gl) {
>   		glock_clear_object(ip->i_gl, ip);
>   		gfs2_glock_put(ip->i_gl);
>   	}
>   	gfs2_rsqa_delete(ip, NULL);
> -fail_free_acls:
> +fail2:
>   	posix_acl_release(default_acl);
>   	posix_acl_release(acl);
> -fail_gunlock:
> +fail:
>   	gfs2_dir_no_add(&da);
>   	gfs2_glock_dq_uninit(ghs);
>   	if (!IS_ERR_OR_NULL(inode)) {
> @@ -804,7 +803,6 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   	}
>   	if (gfs2_holder_initialized(ghs + 1))
>   		gfs2_glock_dq_uninit(ghs + 1);
> -fail:
>   	return error;
>   }
>   
>