Patchwork [06/18] fs: make posix_acl_create more useful

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Submitter Christoph Hellwig
Date Dec. 1, 2013, 11:59 a.m.
Message ID <20131201120654.610216548@bombadil.infradead.org>
Download mbox | patch
Permalink /patch/295653/
State Not Applicable
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Comments

Christoph Hellwig - Dec. 1, 2013, 11:59 a.m.
Rename the current posix_acl_created to __posix_acl_create and add
a fully featured helper to set up the ACLs on file creation that
uses get_acl().

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/9p/acl.c               |    2 +-
 fs/btrfs/acl.c            |    2 +-
 fs/ext2/acl.c             |    2 +-
 fs/ext3/acl.c             |    2 +-
 fs/ext4/acl.c             |    2 +-
 fs/f2fs/acl.c             |    2 +-
 fs/generic_acl.c          |    2 +-
 fs/gfs2/acl.c             |    2 +-
 fs/hfsplus/posix_acl.c    |    2 +-
 fs/jffs2/acl.c            |    2 +-
 fs/jfs/acl.c              |    2 +-
 fs/nfs/nfs3acl.c          |    2 +-
 fs/ocfs2/acl.c            |    2 +-
 fs/posix_acl.c            |   53 +++++++++++++++++++++++++++++++++++++++++++--
 fs/reiserfs/xattr_acl.c   |    2 +-
 fs/xfs/xfs_acl.c          |    4 ++--
 include/linux/posix_acl.h |    6 ++++-
 17 files changed, 72 insertions(+), 19 deletions(-)
Jan Kara - Dec. 2, 2013, 9:11 p.m.
On Sun 01-12-13 03:59:09, Christoph Hellwig wrote:
> Rename the current posix_acl_created to __posix_acl_create and add
> a fully featured helper to set up the ACLs on file creation that
> uses get_acl().
  Looks good, you can add:
Reviewed-by: Jan Kara <jack@suse.cz>

								Honza

> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  fs/9p/acl.c               |    2 +-
>  fs/btrfs/acl.c            |    2 +-
>  fs/ext2/acl.c             |    2 +-
>  fs/ext3/acl.c             |    2 +-
>  fs/ext4/acl.c             |    2 +-
>  fs/f2fs/acl.c             |    2 +-
>  fs/generic_acl.c          |    2 +-
>  fs/gfs2/acl.c             |    2 +-
>  fs/hfsplus/posix_acl.c    |    2 +-
>  fs/jffs2/acl.c            |    2 +-
>  fs/jfs/acl.c              |    2 +-
>  fs/nfs/nfs3acl.c          |    2 +-
>  fs/ocfs2/acl.c            |    2 +-
>  fs/posix_acl.c            |   53 +++++++++++++++++++++++++++++++++++++++++++--
>  fs/reiserfs/xattr_acl.c   |    2 +-
>  fs/xfs/xfs_acl.c          |    4 ++--
>  include/linux/posix_acl.h |    6 ++++-
>  17 files changed, 72 insertions(+), 19 deletions(-)
> 
> diff --git a/fs/9p/acl.c b/fs/9p/acl.c
> index f5ce5c5..8482f2d 100644
> --- a/fs/9p/acl.c
> +++ b/fs/9p/acl.c
> @@ -200,7 +200,7 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
>  	if (acl) {
>  		if (S_ISDIR(mode))
>  			*dpacl = posix_acl_dup(acl);
> -		retval = posix_acl_create(&acl, GFP_NOFS, &mode);
> +		retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
>  		if (retval < 0)
>  			return retval;
>  		if (retval > 0)
> diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
> index 1af04ff..b56519d 100644
> --- a/fs/btrfs/acl.c
> +++ b/fs/btrfs/acl.c
> @@ -222,7 +222,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
>  			if (ret)
>  				goto failed;
>  		}
> -		ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> +		ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
>  		if (ret < 0)
>  			return ret;
>  
> diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
> index 7006ced..6e842a7 100644
> --- a/fs/ext2/acl.c
> +++ b/fs/ext2/acl.c
> @@ -268,7 +268,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
>  			if (error)
>  				goto cleanup;
>  		}
> -		error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
> +		error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
>  		if (error < 0)
>  			return error;
>  		if (error > 0) {
> diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
> index 6691a6c..4f3d8fa 100644
> --- a/fs/ext3/acl.c
> +++ b/fs/ext3/acl.c
> @@ -271,7 +271,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
>  			if (error)
>  				goto cleanup;
>  		}
> -		error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> +		error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
>  		if (error < 0)
>  			return error;
>  
> diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
> index 2eebe02..f827f3b 100644
> --- a/fs/ext4/acl.c
> +++ b/fs/ext4/acl.c
> @@ -276,7 +276,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
>  			if (error)
>  				goto cleanup;
>  		}
> -		error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> +		error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
>  		if (error < 0)
>  			return error;
>  
> diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
> index 14c4df0..45e8430 100644
> --- a/fs/f2fs/acl.c
> +++ b/fs/f2fs/acl.c
> @@ -285,7 +285,7 @@ int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage)
>  		if (error)
>  			goto cleanup;
>  	}
> -	error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
> +	error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
>  	if (error < 0)
>  		return error;
>  	if (error > 0)
> diff --git a/fs/generic_acl.c b/fs/generic_acl.c
> index 46a5076..4357f39 100644
> --- a/fs/generic_acl.c
> +++ b/fs/generic_acl.c
> @@ -128,7 +128,7 @@ generic_acl_init(struct inode *inode, struct inode *dir)
>  	if (acl) {
>  		if (S_ISDIR(inode->i_mode))
>  			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
> -		error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
> +		error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
>  		if (error < 0)
>  			return error;
>  		if (error > 0)
> diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
> index 3e200c7..e82e4ac 100644
> --- a/fs/gfs2/acl.c
> +++ b/fs/gfs2/acl.c
> @@ -131,7 +131,7 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
>  			goto out;
>  	}
>  
> -	error = posix_acl_create(&acl, GFP_NOFS, &mode);
> +	error = __posix_acl_create(&acl, GFP_NOFS, &mode);
>  	if (error < 0)
>  		return error;
>  
> diff --git a/fs/hfsplus/posix_acl.c b/fs/hfsplus/posix_acl.c
> index cab5fd6..277942f 100644
> --- a/fs/hfsplus/posix_acl.c
> +++ b/fs/hfsplus/posix_acl.c
> @@ -137,7 +137,7 @@ int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
>  				goto init_acl_cleanup;
>  		}
>  
> -		err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> +		err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
>  		if (unlikely(err < 0))
>  			return err;
>  
> diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
> index 5853969..4d6e31b 100644
> --- a/fs/jffs2/acl.c
> +++ b/fs/jffs2/acl.c
> @@ -295,7 +295,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode
>  		if (S_ISDIR(*i_mode))
>  			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
>  
> -		rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
> +		rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode);
>  		if (rc < 0)
>  			return rc;
>  		if (rc > 0)
> diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
> index 9c0fca8..28d529a 100644
> --- a/fs/jfs/acl.c
> +++ b/fs/jfs/acl.c
> @@ -132,7 +132,7 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
>  			if (rc)
>  				goto cleanup;
>  		}
> -		rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
> +		rc = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
>  		if (rc < 0)
>  			goto cleanup; /* posix_acl_release(NULL) is no-op */
>  		if (rc > 0)
> diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
> index 4a1aafb..e859675 100644
> --- a/fs/nfs/nfs3acl.c
> +++ b/fs/nfs/nfs3acl.c
> @@ -428,7 +428,7 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
>  	if (!dfacl)
>  		return 0;
>  	acl = posix_acl_dup(dfacl);
> -	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
> +	error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
>  	if (error < 0)
>  		goto out_release_dfacl;
>  	error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
> diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
> index 73ccf0e..c0f9d2f 100644
> --- a/fs/ocfs2/acl.c
> +++ b/fs/ocfs2/acl.c
> @@ -401,7 +401,7 @@ int ocfs2_init_acl(handle_t *handle,
>  				goto cleanup;
>  		}
>  		mode = inode->i_mode;
> -		ret = posix_acl_create(&acl, GFP_NOFS, &mode);
> +		ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
>  		if (ret < 0)
>  			return ret;
>  
> diff --git a/fs/posix_acl.c b/fs/posix_acl.c
> index 9f76aaa..38d6a49 100644
> --- a/fs/posix_acl.c
> +++ b/fs/posix_acl.c
> @@ -384,7 +384,7 @@ static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
>  }
>  
>  int
> -posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
> +__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
>  {
>  	struct posix_acl *clone = posix_acl_clone(*acl, gfp);
>  	int err = -ENOMEM;
> @@ -399,7 +399,7 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
>  	*acl = clone;
>  	return err;
>  }
> -EXPORT_SYMBOL(posix_acl_create);
> +EXPORT_SYMBOL(__posix_acl_create);
>  
>  int
>  __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
> @@ -443,6 +443,55 @@ posix_acl_chmod(struct inode *inode)
>  }
>  EXPORT_SYMBOL(posix_acl_chmod);
>  
> +int
> +posix_acl_create(struct inode *dir, umode_t *mode,
> +		struct posix_acl **default_acl, struct posix_acl **acl)
> +{
> +	struct posix_acl *p;
> +	int ret;
> +
> +	if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
> +		goto no_acl;
> +
> +	p = get_acl(dir, ACL_TYPE_DEFAULT);
> +	if (IS_ERR(p))
> +		return PTR_ERR(p);
> +
> +	if (!p) {
> +		*mode &= ~current_umask();
> +		goto no_acl;
> +	}
> +
> +	*acl = posix_acl_clone(p, GFP_NOFS);
> +	if (!*acl)
> +		return -ENOMEM;
> +
> +	ret = posix_acl_create_masq(*acl, mode);
> +	if (ret < 0) {
> +		posix_acl_release(*acl);
> +		return -ENOMEM;
> +	}
> +
> +	if (ret == 0) {
> +		posix_acl_release(*acl);
> +		*acl = NULL;
> +	}
> +
> +	if (!S_ISDIR(*mode)) {
> +		posix_acl_release(p);
> +		*default_acl = NULL;
> +	} else {
> +		*default_acl = p;
> +	}
> +	return 0;
> +
> +no_acl:
> +	*default_acl = NULL;
> +	*acl = NULL;
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(posix_acl_create);
> +
>  struct posix_acl *get_acl(struct inode *inode, int type)
>  {
>  	struct posix_acl *acl;
> diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
> index ea4e443..d95c959 100644
> --- a/fs/reiserfs/xattr_acl.c
> +++ b/fs/reiserfs/xattr_acl.c
> @@ -378,7 +378,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
>  
>  		/* Now we reconcile the new ACL and the mode,
>  		   potentially modifying both */
> -		err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> +		err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
>  		if (err < 0)
>  			return err;
>  
> diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
> index 4eac105..057ae2d 100644
> --- a/fs/xfs/xfs_acl.c
> +++ b/fs/xfs/xfs_acl.c
> @@ -297,12 +297,12 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
>  			goto out;
>  	}
>  
> -	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
> +	error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
>  	if (error < 0)
>  		return error;
>  
>  	/*
> -	 * If posix_acl_create returns a positive value we need to
> +	 * If __posix_acl_create returns a positive value we need to
>  	 * inherit a permission that can't be represented using the Unix
>  	 * mode bits and we actually need to set an ACL.
>  	 */
> diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
> index 8b64e78..9ec6b45 100644
> --- a/include/linux/posix_acl.h
> +++ b/include/linux/posix_acl.h
> @@ -88,14 +88,18 @@ extern int posix_acl_valid(const struct posix_acl *);
>  extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
>  extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
>  extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
> -extern int posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
> +extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
>  extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
> +extern int posix_acl_prepare(struct inode *dir, struct inode *inode,
> +		umode_t *mode);
>  
>  extern struct posix_acl *get_posix_acl(struct inode *, int);
>  extern int set_posix_acl(struct inode *, int, struct posix_acl *);
>  
>  #ifdef CONFIG_FS_POSIX_ACL
>  extern int posix_acl_chmod(struct inode *);
> +extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
> +		struct posix_acl **);
>  
>  static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
>  {
> -- 
> 1.7.10.4
> 
> 
> --
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Patch

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index f5ce5c5..8482f2d 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -200,7 +200,7 @@  int v9fs_acl_mode(struct inode *dir, umode_t *modep,
 	if (acl) {
 		if (S_ISDIR(mode))
 			*dpacl = posix_acl_dup(acl);
-		retval = posix_acl_create(&acl, GFP_NOFS, &mode);
+		retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
 		if (retval < 0)
 			return retval;
 		if (retval > 0)
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 1af04ff..b56519d 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -222,7 +222,7 @@  int btrfs_init_acl(struct btrfs_trans_handle *trans,
 			if (ret)
 				goto failed;
 		}
-		ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (ret < 0)
 			return ret;
 
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 7006ced..6e842a7 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -268,7 +268,7 @@  ext2_init_acl(struct inode *inode, struct inode *dir)
 			if (error)
 				goto cleanup;
 		}
-		error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+		error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
 		if (error < 0)
 			return error;
 		if (error > 0) {
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 6691a6c..4f3d8fa 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -271,7 +271,7 @@  ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			if (error)
 				goto cleanup;
 		}
-		error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (error < 0)
 			return error;
 
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 2eebe02..f827f3b 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -276,7 +276,7 @@  ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			if (error)
 				goto cleanup;
 		}
-		error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (error < 0)
 			return error;
 
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index 14c4df0..45e8430 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -285,7 +285,7 @@  int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage)
 		if (error)
 			goto cleanup;
 	}
-	error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+	error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
 	if (error < 0)
 		return error;
 	if (error > 0)
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 46a5076..4357f39 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -128,7 +128,7 @@  generic_acl_init(struct inode *inode, struct inode *dir)
 	if (acl) {
 		if (S_ISDIR(inode->i_mode))
 			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
-		error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+		error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
 		if (error < 0)
 			return error;
 		if (error > 0)
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 3e200c7..e82e4ac 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -131,7 +131,7 @@  int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
 			goto out;
 	}
 
-	error = posix_acl_create(&acl, GFP_NOFS, &mode);
+	error = __posix_acl_create(&acl, GFP_NOFS, &mode);
 	if (error < 0)
 		return error;
 
diff --git a/fs/hfsplus/posix_acl.c b/fs/hfsplus/posix_acl.c
index cab5fd6..277942f 100644
--- a/fs/hfsplus/posix_acl.c
+++ b/fs/hfsplus/posix_acl.c
@@ -137,7 +137,7 @@  int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
 				goto init_acl_cleanup;
 		}
 
-		err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (unlikely(err < 0))
 			return err;
 
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 5853969..4d6e31b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -295,7 +295,7 @@  int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode
 		if (S_ISDIR(*i_mode))
 			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
 
-		rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
+		rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode);
 		if (rc < 0)
 			return rc;
 		if (rc > 0)
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 9c0fca8..28d529a 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -132,7 +132,7 @@  int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
 			if (rc)
 				goto cleanup;
 		}
-		rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+		rc = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
 		if (rc < 0)
 			goto cleanup; /* posix_acl_release(NULL) is no-op */
 		if (rc > 0)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 4a1aafb..e859675 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -428,7 +428,7 @@  int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 	if (!dfacl)
 		return 0;
 	acl = posix_acl_dup(dfacl);
-	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+	error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
 	if (error < 0)
 		goto out_release_dfacl;
 	error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 73ccf0e..c0f9d2f 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -401,7 +401,7 @@  int ocfs2_init_acl(handle_t *handle,
 				goto cleanup;
 		}
 		mode = inode->i_mode;
-		ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+		ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
 		if (ret < 0)
 			return ret;
 
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 9f76aaa..38d6a49 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -384,7 +384,7 @@  static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
 }
 
 int
-posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
+__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
 {
 	struct posix_acl *clone = posix_acl_clone(*acl, gfp);
 	int err = -ENOMEM;
@@ -399,7 +399,7 @@  posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
 	*acl = clone;
 	return err;
 }
-EXPORT_SYMBOL(posix_acl_create);
+EXPORT_SYMBOL(__posix_acl_create);
 
 int
 __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
@@ -443,6 +443,55 @@  posix_acl_chmod(struct inode *inode)
 }
 EXPORT_SYMBOL(posix_acl_chmod);
 
+int
+posix_acl_create(struct inode *dir, umode_t *mode,
+		struct posix_acl **default_acl, struct posix_acl **acl)
+{
+	struct posix_acl *p;
+	int ret;
+
+	if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
+		goto no_acl;
+
+	p = get_acl(dir, ACL_TYPE_DEFAULT);
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+
+	if (!p) {
+		*mode &= ~current_umask();
+		goto no_acl;
+	}
+
+	*acl = posix_acl_clone(p, GFP_NOFS);
+	if (!*acl)
+		return -ENOMEM;
+
+	ret = posix_acl_create_masq(*acl, mode);
+	if (ret < 0) {
+		posix_acl_release(*acl);
+		return -ENOMEM;
+	}
+
+	if (ret == 0) {
+		posix_acl_release(*acl);
+		*acl = NULL;
+	}
+
+	if (!S_ISDIR(*mode)) {
+		posix_acl_release(p);
+		*default_acl = NULL;
+	} else {
+		*default_acl = p;
+	}
+	return 0;
+
+no_acl:
+	*default_acl = NULL;
+	*acl = NULL;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(posix_acl_create);
+
 struct posix_acl *get_acl(struct inode *inode, int type)
 {
 	struct posix_acl *acl;
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index ea4e443..d95c959 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -378,7 +378,7 @@  reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
 
 		/* Now we reconcile the new ACL and the mode,
 		   potentially modifying both */
-		err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+		err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
 		if (err < 0)
 			return err;
 
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 4eac105..057ae2d 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -297,12 +297,12 @@  xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
 			goto out;
 	}
 
-	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+	error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
 	if (error < 0)
 		return error;
 
 	/*
-	 * If posix_acl_create returns a positive value we need to
+	 * If __posix_acl_create returns a positive value we need to
 	 * inherit a permission that can't be represented using the Unix
 	 * mode bits and we actually need to set an ACL.
 	 */
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 8b64e78..9ec6b45 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -88,14 +88,18 @@  extern int posix_acl_valid(const struct posix_acl *);
 extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
 extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
 extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
-extern int posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
+extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
 extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
+extern int posix_acl_prepare(struct inode *dir, struct inode *inode,
+		umode_t *mode);
 
 extern struct posix_acl *get_posix_acl(struct inode *, int);
 extern int set_posix_acl(struct inode *, int, struct posix_acl *);
 
 #ifdef CONFIG_FS_POSIX_ACL
 extern int posix_acl_chmod(struct inode *);
+extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
+		struct posix_acl **);
 
 static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
 {