Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  fs: take the ACL checks to common code
  bury posix_acl_..._masq() variants
  kill boilerplates around posix_acl_create_masq()
  generic_acl: no need to clone acl just to push it to set_cached_acl()
  kill boilerplate around posix_acl_chmod_masq()
  reiserfs: cache negative ACLs for v1 stat format
  xfs: cache negative ACLs if there is no attribute fork
  9p: do no return 0 from ->check_acl without actually checking
  vfs: move ACL cache lookup into generic code
  CIFS: Fix oops while mounting with prefixpath
  xfs: Fix wrong return value of xfs_file_aio_write
  fix devtmpfs race
  caam: don't pass bogus S_IFCHR to debugfs_create_...()
  get rid of create_proc_entry() abuses - proc_mkdir() is there for purpose
  asus-wmi: ->is_visible() can't return negative
  fix jffs2 ACLs on big-endian with 16bit mode_t
  9p: close ACL leaks
  ocfs2_init_acl(): fix a leak
  VFS : mount lock scalability for internal mounts

3 files changed, 36 insertions, 55 deletions

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index e98f56d..814be07 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -96,14 +96,11 @@ static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
 	return acl;
 }
 
-int v9fs_check_acl(struct inode *inode, int mask)
+struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type)
 {
 	struct posix_acl *acl;
 	struct v9fs_session_info *v9ses;
 
-	if (mask & MAY_NOT_BLOCK)
-		return -ECHILD;
-
 	v9ses = v9fs_inode2v9ses(inode);
 	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
 			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
@@ -111,18 +108,10 @@ int v9fs_check_acl(struct inode *inode, int mask)
 		 * On access = client  and acl = on mode get the acl
 		 * values from the server
 		 */
-		return 0;
+		return NULL;
 	}
-	acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
+	return v9fs_get_cached_acl(inode, type);
 
-	if (IS_ERR(acl))
-		return PTR_ERR(acl);
-	if (acl) {
-		int error = posix_acl_permission(inode, acl, mask);
-		posix_acl_release(acl);
-		return error;
-	}
-	return -EAGAIN;
 }
 
 static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)
@@ -165,32 +154,32 @@ err_free_out:
 int v9fs_acl_chmod(struct dentry *dentry)
 {
 	int retval = 0;
-	struct posix_acl *acl, *clone;
+	struct posix_acl *acl;
 	struct inode *inode = dentry->d_inode;
 
 	if (S_ISLNK(inode->i_mode))
 		return -EOPNOTSUPP;
 	acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
 	if (acl) {
-		clone = posix_acl_clone(acl, GFP_KERNEL);
+		retval = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+		if (retval)
+			return retval;
+		retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, acl);
 		posix_acl_release(acl);
-		if (!clone)
-			return -ENOMEM;
-		retval = posix_acl_chmod_masq(clone, inode->i_mode);
-		if (!retval)
-			retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, clone);
-		posix_acl_release(clone);
 	}
 	return retval;
 }
 
 int v9fs_set_create_acl(struct dentry *dentry,
-			struct posix_acl *dpacl, struct posix_acl *pacl)
+			struct posix_acl **dpacl, struct posix_acl **pacl)
 {
-	v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, dpacl);
-	v9fs_set_acl(dentry, ACL_TYPE_ACCESS, pacl);
-	posix_acl_release(dpacl);
-	posix_acl_release(pacl);
+	if (dentry) {
+		v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, *dpacl);
+		v9fs_set_acl(dentry, ACL_TYPE_ACCESS, *pacl);
+	}
+	posix_acl_release(*dpacl);
+	posix_acl_release(*pacl);
+	*dpacl = *pacl = NULL;
 	return 0;
 }
 
@@ -209,29 +198,18 @@ int v9fs_acl_mode(struct inode *dir, mode_t *modep,
 			mode &= ~current_umask();
 	}
 	if (acl) {
-		struct posix_acl *clone;
-
 		if (S_ISDIR(mode))
-			*dpacl = acl;
-		clone = posix_acl_clone(acl, GFP_NOFS);
-		retval = -ENOMEM;
-		if (!clone)
-			goto cleanup;
-
-		retval = posix_acl_create_masq(clone, &mode);
-		if (retval < 0) {
-			posix_acl_release(clone);
-			goto cleanup;
-		}
+			*dpacl = posix_acl_dup(acl);
+		retval = posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (retval < 0)
+			return retval;
 		if (retval > 0)
-			*pacl = clone;
+			*pacl = acl;
+		else
+			posix_acl_release(acl);
 	}
 	*modep  = mode;
 	return 0;
-cleanup:
-	posix_acl_release(acl);
-	return retval;
-
 }
 
 static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
index 59e18c2..ddb7ae1 100644
--- a/fs/9p/acl.h
+++ b/fs/9p/acl.h
@@ -16,14 +16,14 @@
 
 #ifdef CONFIG_9P_FS_POSIX_ACL
 extern int v9fs_get_acl(struct inode *, struct p9_fid *);
-extern int v9fs_check_acl(struct inode *inode, int mask);
+extern struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type);
 extern int v9fs_acl_chmod(struct dentry *);
 extern int v9fs_set_create_acl(struct dentry *,
-			       struct posix_acl *, struct posix_acl *);
+			       struct posix_acl **, struct posix_acl **);
 extern int v9fs_acl_mode(struct inode *dir, mode_t *modep,
 			 struct posix_acl **dpacl, struct posix_acl **pacl);
 #else
-#define v9fs_check_acl NULL
+#define v9fs_iop_get_acl NULL
 static inline int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
 {
 	return 0;
@@ -33,8 +33,8 @@ static inline int v9fs_acl_chmod(struct dentry *dentry)
 	return 0;
 }
 static inline int v9fs_set_create_acl(struct dentry *dentry,
-				      struct posix_acl *dpacl,
-				      struct posix_acl *pacl)
+				      struct posix_acl **dpacl,
+				      struct posix_acl **pacl)
 {
 	return 0;
 }
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 276f4a6..9a26dce 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -287,7 +287,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
 		goto error;
 
 	/* Now set the ACL based on the default value */
-	v9fs_set_create_acl(dentry, dacl, pacl);
+	v9fs_set_create_acl(dentry, &dacl, &pacl);
 
 	v9inode = V9FS_I(inode);
 	mutex_lock(&v9inode->v_mutex);
@@ -328,6 +328,7 @@ error:
 err_clunk_old_fid:
 	if (ofid)
 		p9_client_clunk(ofid);
+	v9fs_set_create_acl(NULL, &dacl, &pacl);
 	return err;
 }
 
@@ -421,12 +422,13 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
 		d_instantiate(dentry, inode);
 	}
 	/* Now set the ACL based on the default value */
-	v9fs_set_create_acl(dentry, dacl, pacl);
+	v9fs_set_create_acl(dentry, &dacl, &pacl);
 	inc_nlink(dir);
 	v9fs_invalidate_inode_attr(dir);
 error:
 	if (fid)
 		p9_client_clunk(fid);
+	v9fs_set_create_acl(NULL, &dacl, &pacl);
 	return err;
 }
 
@@ -826,10 +828,11 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
 		d_instantiate(dentry, inode);
 	}
 	/* Now set the ACL based on the default value */
-	v9fs_set_create_acl(dentry, dacl, pacl);
+	v9fs_set_create_acl(dentry, &dacl, &pacl);
 error:
 	if (fid)
 		p9_client_clunk(fid);
+	v9fs_set_create_acl(NULL, &dacl, &pacl);
 	return err;
 }
 
@@ -914,7 +917,7 @@ const struct inode_operations v9fs_dir_inode_operations_dotl = {
 	.getxattr = generic_getxattr,
 	.removexattr = generic_removexattr,
 	.listxattr = v9fs_listxattr,
-	.check_acl = v9fs_check_acl,
+	.get_acl = v9fs_iop_get_acl,
 };
 
 const struct inode_operations v9fs_file_inode_operations_dotl = {
@@ -924,7 +927,7 @@ const struct inode_operations v9fs_file_inode_operations_dotl = {
 	.getxattr = generic_getxattr,
 	.removexattr = generic_removexattr,
 	.listxattr = v9fs_listxattr,
-	.check_acl = v9fs_check_acl,
+	.get_acl = v9fs_iop_get_acl,
 };
 
 const struct inode_operations v9fs_symlink_inode_operations_dotl = {