kill boilerplates around posix_acl_create_masq()

new helper: posix_acl_create(&acl, gfp, mode_p).  Replaces acl with
modified clone, on failure releases acl and replaces with NULL.
Returns 0 or -ve on error.  All callers of posix_acl_create_masq()
switched.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/9p/acl.c

@@ -206,30 +206,18 @@ int v9fs_acl_mode(struct inode *dir, mode_t *modep,
 			mode &= ~current_umask();
 	}
 	if (acl) {
-		struct posix_acl *clone;
-
 		if (S_ISDIR(mode))
 			*dpacl = posix_acl_dup(acl);
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		posix_acl_release(acl);
-		if (!clone)
-			return -ENOMEM;
-
-		retval = posix_acl_create_masq(clone, &mode);
-		if (retval < 0) {
-			posix_acl_release(clone);
-			goto cleanup;
-		}
+		retval = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (retval < 0)
+			return retval;
 		if (retval > 0)
-			*pacl = clone;
+			*pacl = acl;
 		else
-			posix_acl_release(clone);
+			posix_acl_release(acl);
 	}
 	*modep  = mode;
 	return 0;
-cleanup:
-	return retval;
-
 }
 
 static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,

fs/btrfs/acl.c

@@ -238,8 +238,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
 	}
 
 	if (IS_POSIXACL(dir) && acl) {
-		struct posix_acl *clone;
-		mode_t mode;
+		mode_t mode = inode->i_mode;
 
 		if (S_ISDIR(inode->i_mode)) {
 			ret = btrfs_set_acl(trans, inode, acl,
@@ -247,22 +246,15 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
 			if (ret)
 				goto failed;
 		}
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		ret = -ENOMEM;
-		if (!clone)
-			goto failed;
+		ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (ret < 0)
+			return ret;
 
-		mode = inode->i_mode;
-		ret = posix_acl_create_masq(clone, &mode);
-		if (ret >= 0) {
-			inode->i_mode = mode;
-			if (ret > 0) {
-				/* we need an acl */
-				ret = btrfs_set_acl(trans, inode, clone,
-						    ACL_TYPE_ACCESS);
-			}
+		inode->i_mode = mode;
+		if (ret > 0) {
+			/* we need an acl */
+			ret = btrfs_set_acl(trans, inode, acl, ACL_TYPE_ACCESS);
 		}
-		posix_acl_release(clone);
 	}
 failed:
 	posix_acl_release(acl);

fs/ext2/acl.c

@@ -270,29 +270,20 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
 			inode->i_mode &= ~current_umask();
 	}
 	if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-               struct posix_acl *clone;
-	       mode_t mode;
-
+		mode_t mode = inode->i_mode;
 		if (S_ISDIR(inode->i_mode)) {
 			error = ext2_set_acl(inode, ACL_TYPE_DEFAULT, acl);
 			if (error)
 				goto cleanup;
 		}
-		clone = posix_acl_clone(acl, GFP_KERNEL);
-		error = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-		mode = inode->i_mode;
-		error = posix_acl_create_masq(clone, &mode);
-		if (error >= 0) {
-			inode->i_mode = mode;
-			if (error > 0) {
-				/* This is an extended ACL */
-				error = ext2_set_acl(inode,
-						     ACL_TYPE_ACCESS, clone);
-			}
+		error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+		if (error < 0)
+			return error;
+		inode->i_mode = mode;
+		if (error > 0) {
+			/* This is an extended ACL */
+			error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
 		}
-		posix_acl_release(clone);
 	}
 cleanup:
        posix_acl_release(acl);

fs/ext3/acl.c

@@ -278,8 +278,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			inode->i_mode &= ~current_umask();
 	}
 	if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-		struct posix_acl *clone;
-		mode_t mode;
+		mode_t mode = inode->i_mode;
 
 		if (S_ISDIR(inode->i_mode)) {
 			error = ext3_set_acl(handle, inode,
@@ -287,22 +286,15 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			if (error)
 				goto cleanup;
 		}
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		error = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-
-		mode = inode->i_mode;
-		error = posix_acl_create_masq(clone, &mode);
-		if (error >= 0) {
-			inode->i_mode = mode;
-			if (error > 0) {
-				/* This is an extended ACL */
-				error = ext3_set_acl(handle, inode,
-						     ACL_TYPE_ACCESS, clone);
-			}
+		error = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (error < 0)
+			return error;
+
+		inode->i_mode = mode;
+		if (error > 0) {
+			/* This is an extended ACL */
+			error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
 		}
-		posix_acl_release(clone);
 	}
 cleanup:
 	posix_acl_release(acl);

fs/ext4/acl.c

@@ -276,8 +276,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			inode->i_mode &= ~current_umask();
 	}
 	if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-		struct posix_acl *clone;
-		mode_t mode;
+		mode_t mode = inode->i_mode;
 
 		if (S_ISDIR(inode->i_mode)) {
 			error = ext4_set_acl(handle, inode,
@@ -285,22 +284,15 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 			if (error)
 				goto cleanup;
 		}
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		error = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-
-		mode = inode->i_mode;
-		error = posix_acl_create_masq(clone, &mode);
-		if (error >= 0) {
-			inode->i_mode = mode;
-			if (error > 0) {
-				/* This is an extended ACL */
-				error = ext4_set_acl(handle, inode,
-						     ACL_TYPE_ACCESS, clone);
-			}
+		error = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (error < 0)
+			return error;
+
+		inode->i_mode = mode;
+		if (error > 0) {
+			/* This is an extended ACL */
+			error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
 		}
-		posix_acl_release(clone);
 	}
 cleanup:
 	posix_acl_release(acl);

fs/generic_acl.c

@@ -132,25 +132,17 @@ generic_acl_init(struct inode *inode, struct inode *dir)
 	if (!S_ISLNK(inode->i_mode))
 		acl = get_cached_acl(dir, ACL_TYPE_DEFAULT);
 	if (acl) {
-		struct posix_acl *clone;
-
 		if (S_ISDIR(inode->i_mode))
 			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
-		clone = posix_acl_clone(acl, GFP_KERNEL);
-		error = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-		error = posix_acl_create_masq(clone, &mode);
-		if (error >= 0) {
-			inode->i_mode = mode;
-			if (error > 0)
-				set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
-		}
-		posix_acl_release(clone);
+		error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+		if (error < 0)
+			return error;
+		inode->i_mode = mode;
+		if (error > 0)
+			set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
 	}
 	error = 0;
 
-cleanup:
 	posix_acl_release(acl);
 	return error;
 }

fs/gfs2/acl.c

@@ -137,7 +137,7 @@ out:
 int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-	struct posix_acl *acl, *clone;
+	struct posix_acl *acl;
 	mode_t mode = inode->i_mode;
 	int error = 0;
 
@@ -162,16 +162,10 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
 			goto out;
 	}
 
-	clone = posix_acl_clone(acl, GFP_NOFS);
-	error = -ENOMEM;
-	if (!clone)
-		goto out;
-	posix_acl_release(acl);
-	acl = clone;
-
-	error = posix_acl_create_masq(acl, &mode);
+	error = posix_acl_create(&acl, GFP_NOFS, &mode);
 	if (error < 0)
-		goto out;
+		return error;
+
 	if (error == 0)
 		goto munge;
 

fs/jffs2/acl.c

@@ -277,7 +277,7 @@ int jffs2_check_acl(struct inode *inode, int mask)
 
 int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, mode_t *i_mode)
 {
-	struct posix_acl *acl, *clone;
+	struct posix_acl *acl;
 	int rc;
 
 	cache_no_acl(inode);
@@ -295,18 +295,13 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, mode_t *i_mode)
 		if (S_ISDIR(*i_mode))
 			set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
 
-		clone = posix_acl_clone(acl, GFP_KERNEL);
-		if (!clone)
-			return -ENOMEM;
-		rc = posix_acl_create_masq(clone, i_mode);
-		if (rc < 0) {
-			posix_acl_release(clone);
+		rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
+		if (rc < 0)
 			return rc;
-		}
 		if (rc > 0)
-			set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
+			set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
 
-		posix_acl_release(clone);
+		posix_acl_release(acl);
 	}
 	return 0;
 }

fs/jfs/acl.c

@@ -133,8 +133,6 @@ int jfs_check_acl(struct inode *inode, int mask)
 int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
 {
 	struct posix_acl *acl = NULL;
-	struct posix_acl *clone;
-	mode_t mode;
 	int rc = 0;
 
 	if (S_ISLNK(inode->i_mode))
@@ -145,25 +143,18 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
 		return PTR_ERR(acl);
 
 	if (acl) {
+		mode_t mode = inode->i_mode;
 		if (S_ISDIR(inode->i_mode)) {
 			rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl);
 			if (rc)
 				goto cleanup;
 		}
-		clone = posix_acl_clone(acl, GFP_KERNEL);
-		if (!clone) {
-			rc = -ENOMEM;
-			goto cleanup;
-		}
-		mode = inode->i_mode;
-		rc = posix_acl_create_masq(clone, &mode);
-		if (rc >= 0) {
-			inode->i_mode = mode;
-			if (rc > 0)
-				rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS,
-						 clone);
-		}
-		posix_acl_release(clone);
+		rc = posix_acl_create(&acl, GFP_KERNEL, &mode);
+		if (rc < 0)
+			goto cleanup; /* posix_acl_release(NULL) is no-op */
+		inode->i_mode = mode;
+		if (rc > 0)
+			rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
 cleanup:
 		posix_acl_release(acl);
 	} else

fs/nfs/nfs3acl.c

@@ -427,16 +427,12 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 	}
 	if (!dfacl)
 		return 0;
-	acl = posix_acl_clone(dfacl, GFP_KERNEL);
-	error = -ENOMEM;
-	if (!acl)
-		goto out_release_dfacl;
-	error = posix_acl_create_masq(acl, &mode);
+	acl = posix_acl_dup(dfacl);
+	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
 	if (error < 0)
-		goto out_release_acl;
+		goto out_release_dfacl;
 	error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
 						      dfacl : NULL);
-out_release_acl:
 	posix_acl_release(acl);
 out_release_dfacl:
 	posix_acl_release(dfacl);

fs/ocfs2/acl.c

@@ -382,8 +382,6 @@ int ocfs2_init_acl(handle_t *handle,
 		}
 	}
 	if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
-		struct posix_acl *clone;
-
 		if (S_ISDIR(inode->i_mode)) {
 			ret = ocfs2_set_acl(handle, inode, di_bh,
 					    ACL_TYPE_DEFAULT, acl,
@@ -391,28 +389,22 @@ int ocfs2_init_acl(handle_t *handle,
 			if (ret)
 				goto cleanup;
 		}
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		ret = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-
 		mode = inode->i_mode;
-		ret = posix_acl_create_masq(clone, &mode);
-		if (ret >= 0) {
-			ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
-			if (ret2) {
-				mlog_errno(ret2);
-				ret = ret2;
-				posix_acl_release(clone);
-				goto cleanup;
-			}
-			if (ret > 0) {
-				ret = ocfs2_set_acl(handle, inode,
-						    di_bh, ACL_TYPE_ACCESS,
-						    clone, meta_ac, data_ac);
-			}
+		ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (ret < 0)
+			return ret;
+
+		ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
+		if (ret2) {
+			mlog_errno(ret2);
+			ret = ret2;
+			goto cleanup;
+		}
+		if (ret > 0) {
+			ret = ocfs2_set_acl(handle, inode,
+					    di_bh, ACL_TYPE_ACCESS,
+					    acl, meta_ac, data_ac);
 		}
-		posix_acl_release(clone);
 	}
 cleanup:
 	posix_acl_release(acl);

fs/posix_acl.c

@@ -387,6 +387,24 @@ posix_acl_chmod_masq(struct posix_acl *acl, mode_t mode)
 	return 0;
 }
 
+int
+posix_acl_create(struct posix_acl **acl, gfp_t gfp, mode_t *mode_p)
+{
+	struct posix_acl *clone = posix_acl_clone(*acl, gfp);
+	int err = -ENOMEM;
+	if (clone) {
+		err = posix_acl_create_masq(clone, mode_p);
+		if (err < 0) {
+			posix_acl_release(clone);
+			clone = NULL;
+		}
+	}
+	posix_acl_release(*acl);
+	*acl = clone;
+	return err;
+}
+EXPORT_SYMBOL(posix_acl_create);
+
 int
 posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, mode_t mode)
 {

fs/reiserfs/xattr_acl.c

@@ -354,9 +354,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
 		return PTR_ERR(acl);
 
 	if (acl) {
-		struct posix_acl *acl_copy;
 		mode_t mode = inode->i_mode;
-		int need_acl;
 
 		/* Copy the default ACL to the default ACL of a new directory */
 		if (S_ISDIR(inode->i_mode)) {
@@ -368,29 +366,15 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
 
 		/* Now we reconcile the new ACL and the mode,
 		   potentially modifying both */
-		acl_copy = posix_acl_clone(acl, GFP_NOFS);
-		if (!acl_copy) {
-			err = -ENOMEM;
-			goto cleanup;
-		}
+		err = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (err < 0)
+			return err;
 
-		need_acl = posix_acl_create_masq(acl_copy, &mode);
-		if (need_acl >= 0) {
-			if (mode != inode->i_mode) {
-				inode->i_mode = mode;
-			}
+		inode->i_mode = mode;
 
-			/* If we need an ACL.. */
-			if (need_acl > 0) {
-				err = reiserfs_set_acl(th, inode,
-						       ACL_TYPE_ACCESS,
-						       acl_copy);
-				if (err)
-					goto cleanup_copy;
-			}
-		}
-	      cleanup_copy:
-		posix_acl_release(acl_copy);
+		/* If we need an ACL.. */
+		if (err > 0)
+			err = reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS, acl);
 	      cleanup:
 		posix_acl_release(acl);
 	} else {

fs/xfs/linux-2.6/xfs_acl.c

@@ -282,29 +282,23 @@ posix_acl_default_exists(struct inode *inode)
  * No need for i_mutex because the inode is not yet exposed to the VFS.
  */
 int
-xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
+xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
 {
-	struct posix_acl *clone;
-	mode_t mode;
+	mode_t mode = inode->i_mode;
 	int error = 0, inherit = 0;
 
 	if (S_ISDIR(inode->i_mode)) {
-		error = xfs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl);
+		error = xfs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
 		if (error)
-			return error;
+			goto out;
 	}
 
-	clone = posix_acl_clone(default_acl, GFP_KERNEL);
-	if (!clone)
-		return -ENOMEM;
-
-	mode = inode->i_mode;
-	error = posix_acl_create_masq(clone, &mode);
+	error = posix_acl_create(&acl, GFP_KERNEL, &mode);
 	if (error < 0)
-		goto out_release_clone;
+		return error;
 
 	/*
-	 * If posix_acl_create_masq 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.
 	 */
@@ -313,13 +307,13 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
 
 	error = xfs_set_mode(inode, mode);
 	if (error)
-		goto out_release_clone;
+		goto out;
 
 	if (inherit)
-		error = xfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
+		error = xfs_set_acl(inode, ACL_TYPE_ACCESS, acl);
 
- out_release_clone:
-	posix_acl_release(clone);
+out:
+	posix_acl_release(acl);
 	return error;
 }
 

fs/xfs/linux-2.6/xfs_iops.c

@@ -202,9 +202,9 @@ xfs_vn_mknod(
 
 	if (default_acl) {
 		error = -xfs_inherit_acl(inode, default_acl);
+		default_acl = NULL;
 		if (unlikely(error))
 			goto out_cleanup_inode;
-		posix_acl_release(default_acl);
 	}
 
 

include/linux/posix_acl.h

@@ -80,6 +80,7 @@ extern struct posix_acl *posix_acl_from_mode(mode_t, gfp_t);
 extern int posix_acl_equiv_mode(const struct posix_acl *, mode_t *);
 extern int posix_acl_create_masq(struct posix_acl *, mode_t *);
 extern int posix_acl_chmod_masq(struct posix_acl *, mode_t);
+extern int posix_acl_create(struct posix_acl **, gfp_t, mode_t *);
 extern int posix_acl_chmod(struct posix_acl **, gfp_t, mode_t);
 
 extern struct posix_acl *get_posix_acl(struct inode *, int);