From 9f9d59ded94f648202505e278f67667879e60be8 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 19 Apr 2020 21:57:53 +0200
Subject: inomap: rework logic to efficiently support flags

Adding flags allows to use inomap in reverse mode,
replacing the clunky inoBaseDirIV/inoBaseNameFile
logic that causes problems with high underlying
inode numbers ( https://github.com/rfjakob/gocryptfs/issues/457 )

Microbenchmarks (values below) show that the "SingleDev"
case is now much slower due to an extra map lookup,
but this has no visible effects in ./test.bash results,
so there was no time spent optimizing the case further.

$ go test -bench=.
goos: linux
goarch: amd64
pkg: github.com/rfjakob/gocryptfs/internal/inomap
BenchmarkTranslateSingleDev-4   	18757510	        61.5 ns/op
BenchmarkTranslateManyDevs-4    	18061515	        64.5 ns/op
PASS
ok  	github.com/rfjakob/gocryptfs/internal/inomap	2.467s
---
 internal/fusefrontend/fs.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'internal/fusefrontend')

diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index cfd17e3..dbd8236 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -85,7 +85,7 @@ func NewFS(args Args, c *contentenc.ContentEnc, n nametransform.NameTransformer)
 		args:          args,
 		nameTransform: n,
 		contentEnc:    c,
-		inoMap:        inomap.New(uint64(st.Dev)), // cast is needed for Darwin
+		inoMap:        inomap.New(),
 	}
 }
 
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