From f6dad8d0fae25b5d88ad036b841fea10b7296ccb Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 3 Jan 2019 13:32:13 +0100
Subject: nametransform: simplify WriteDirIV to WriteDirIVAt

Un-spaghettify the function and let the callers open
the directory.
---
 internal/fusefrontend/fs_dir.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'internal/fusefrontend')

diff --git a/internal/fusefrontend/fs_dir.go b/internal/fusefrontend/fs_dir.go
index 181ccb5..302fe38 100644
--- a/internal/fusefrontend/fs_dir.go
+++ b/internal/fusefrontend/fs_dir.go
@@ -37,9 +37,14 @@ func (fs *FS) mkdirWithIv(dirfd int, cName string, mode uint32) error {
 	if err != nil {
 		return err
 	}
-	// Create gocryptfs.diriv
-	err = nametransform.WriteDirIV(dirfd, cName)
+	dirfd2, err := syscallcompat.Openat(dirfd, cName, syscall.O_DIRECTORY|syscall.O_NOFOLLOW|syscallcompat.O_PATH, 0)
+	if err == nil {
+		// Create gocryptfs.diriv
+		err = nametransform.WriteDirIVAt(dirfd2)
+		syscall.Close(dirfd2)
+	}
 	if err != nil {
+		// Delete inconsistent directory (missing gocryptfs.diriv!)
 		err2 := syscallcompat.Unlinkat(dirfd, cName, unix.AT_REMOVEDIR)
 		if err2 != nil {
 			tlog.Warn.Printf("mkdirWithIv: rollback failed: %v", err2)
-- 
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