From 94037395ff64436a60ad06fbf15ef42f8ae1231c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Tue, 10 Dec 2019 20:27:57 +0100
Subject: [PATCH] sectorbuilder: Fix proving on RO filesystem

---
 lib/sectorbuilder/files.go         | 7 +------
 lib/sectorbuilder/sectorbuilder.go | 8 ++++++++
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/lib/sectorbuilder/files.go b/lib/sectorbuilder/files.go
index 373741cc8..62eeeceb1 100644
--- a/lib/sectorbuilder/files.go
+++ b/lib/sectorbuilder/files.go
@@ -31,12 +31,7 @@ func (sb *SectorBuilder) stagedSectorFile(sectorID uint64) (*os.File, error) {
 func (sb *SectorBuilder) SealedSectorPath(sectorID uint64) (string, error) {
 	path := filepath.Join(sb.sealedDir, sb.SectorName(sectorID))
 
-	e, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, 0644)
-	if err != nil {
-		return "", err
-	}
-
-	return path, e.Close()
+	return path, nil
 }
 
 func (sb *SectorBuilder) sectorCacheDir(sectorID uint64) (string, error) {
diff --git a/lib/sectorbuilder/sectorbuilder.go b/lib/sectorbuilder/sectorbuilder.go
index 9a401cc97..319143785 100644
--- a/lib/sectorbuilder/sectorbuilder.go
+++ b/lib/sectorbuilder/sectorbuilder.go
@@ -483,6 +483,14 @@ func (sb *SectorBuilder) SealPreCommit(sectorID uint64, ticket SealTicket, piece
 		return RawSealPreCommitOutput{}, xerrors.Errorf("getting sealed sector path: %w", err)
 	}
 
+	e, err := os.OpenFile(sealedPath, os.O_RDWR|os.O_CREATE, 0644)
+	if err != nil {
+		return RawSealPreCommitOutput{}, xerrors.Errorf("ensuring sealed file exists: %w", err)
+	}
+	if err := e.Close(); err != nil {
+		return RawSealPreCommitOutput{}, err
+	}
+
 	var sum uint64
 	for _, piece := range pieces {
 		sum += piece.Size