Re: [PATCH] fsstack/ecryptfs: remove unused get_nlinks param to fsstack_copy_attr_all

[Tyler Hicks <tyhicks@linux.vnet.ibm.com>]

On Wed Dec 02, 2009 at 07:51:54PM -0500, Erez Zadok (ezk@cs.sunysb.edu) was quoted:
> 
> Andrew/Tyler/Dustin,
> 
> This get_nlinks parameter was never used by the only mainline user,
> ecryptfs; and it has never been used by unionfs or wrapfs either.  I've been
> using this patch in unionfs for over 4 years now; given that it's a no-op to
> ecryptfs, I think it can safely go straight to mainline.
> 
> BTW, Mike Halcrow signed off on this patch a long time ago.
> 
>  fs/ecryptfs/dentry.c     |    2 +-
>  fs/ecryptfs/inode.c      |    6 +++---
>  fs/ecryptfs/main.c       |    2 +-
>  fs/stack.c               |   17 +++--------------
>  include/linux/fs_stack.h |    4 +---
>  5 files changed, 9 insertions(+), 22 deletions(-)
> 
> Thanks,
> Erez.
> 
> ------------------------------------------------------------------------------
> 
> fsstack/ecryptfs: remove unused get_nlinks param to fsstack_copy_attr_all
> 
> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>

Acked-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

Al, since this touches fs/*.c, do you want to carry it or should I keep
it in the eCryptfs next branch?

> 
> diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
> index 2dda5ad..8f006a0 100644
> --- a/fs/ecryptfs/dentry.c
> +++ b/fs/ecryptfs/dentry.c
> @@ -62,7 +62,7 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
>  		struct inode *lower_inode =
>  			ecryptfs_inode_to_lower(dentry->d_inode);
> 
> -		fsstack_copy_attr_all(dentry->d_inode, lower_inode, NULL);
> +		fsstack_copy_attr_all(dentry->d_inode, lower_inode);
>  	}
>  out:
>  	return rc;
> diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
> index 056fed6..429ca0b 100644
> --- a/fs/ecryptfs/inode.c
> +++ b/fs/ecryptfs/inode.c
> @@ -626,9 +626,9 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
>  			lower_new_dir_dentry->d_inode, lower_new_dentry);
>  	if (rc)
>  		goto out_lock;
> -	fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL);
> +	fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode);
>  	if (new_dir != old_dir)
> -		fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL);
> +		fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode);
>  out_lock:
>  	unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
>  	dput(lower_new_dentry->d_parent);
> @@ -967,7 +967,7 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
>  	rc = notify_change(lower_dentry, ia);
>  	mutex_unlock(&lower_dentry->d_inode->i_mutex);
>  out:
> -	fsstack_copy_attr_all(inode, lower_inode, NULL);
> +	fsstack_copy_attr_all(inode, lower_inode);
>  	return rc;
>  }
> 
> diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
> index c6ac85d..427588a 100644
> --- a/fs/ecryptfs/main.c
> +++ b/fs/ecryptfs/main.c
> @@ -194,7 +194,7 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
>  		init_special_inode(inode, lower_inode->i_mode,
>  				   lower_inode->i_rdev);
>  	dentry->d_op = &ecryptfs_dops;
> -	fsstack_copy_attr_all(inode, lower_inode, NULL);
> +	fsstack_copy_attr_all(inode, lower_inode);
>  	/* This size will be overwritten for real files w/ headers and
>  	 * other metadata */
>  	fsstack_copy_inode_size(inode, lower_inode);
> diff --git a/fs/stack.c b/fs/stack.c
> index 67716f6..0e20e43 100644
> --- a/fs/stack.c
> +++ b/fs/stack.c
> @@ -14,11 +14,8 @@ void fsstack_copy_inode_size(struct inode *dst, const struct inode *src)
>  }
>  EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
> 
> -/* copy all attributes; get_nlinks is optional way to override the i_nlink
> - * copying
> - */
> -void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
> -				int (*get_nlinks)(struct inode *))
> +/* copy all attributes */
> +void fsstack_copy_attr_all(struct inode *dest, const struct inode *src)
>  {
>  	dest->i_mode = src->i_mode;
>  	dest->i_uid = src->i_uid;
> @@ -29,14 +26,6 @@ void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
>  	dest->i_ctime = src->i_ctime;
>  	dest->i_blkbits = src->i_blkbits;
>  	dest->i_flags = src->i_flags;
> -
> -	/*
> -	 * Update the nlinks AFTER updating the above fields, because the
> -	 * get_links callback may depend on them.
> -	 */
> -	if (!get_nlinks)
> -		dest->i_nlink = src->i_nlink;
> -	else
> -		dest->i_nlink = (*get_nlinks)(dest);
> +	dest->i_nlink = src->i_nlink;
>  }
>  EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
> diff --git a/include/linux/fs_stack.h b/include/linux/fs_stack.h
> index bb516ce..aa60311 100644
> --- a/include/linux/fs_stack.h
> +++ b/include/linux/fs_stack.h
> @@ -8,9 +8,7 @@
>  #include <linux/fs.h>
> 
>  /* externs for fs/stack.c */
> -extern void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
> -				int (*get_nlinks)(struct inode *));
> -
> +extern void fsstack_copy_attr_all(struct inode *dest, const struct inode *src);
>  extern void fsstack_copy_inode_size(struct inode *dst, const struct inode *src);
> 
>  /* inlines */