From 2d386fc92e88be5384d1654db5d6e23ef4682354 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Wed, 11 Aug 2021 20:21:32 +0200
Subject: syscallcompat: move quirks logic here & fix darwin

We need to look at f_fstypename acc. to
https://stackoverflow.com/a/52299141/1380267 :

> As filesystem type numbers are now assigned at runtime in
> recent versions of MacOS, you must use f_fstypename to
> determine the type.

https://github.com/rfjakob/gocryptfs/issues/585
---
 internal/fusefrontend/quirks.go | 52 -----------------------------------------
 1 file changed, 52 deletions(-)
 delete mode 100644 internal/fusefrontend/quirks.go

(limited to 'internal/fusefrontend/quirks.go')

diff --git a/internal/fusefrontend/quirks.go b/internal/fusefrontend/quirks.go
deleted file mode 100644
index 2979c84..0000000
--- a/internal/fusefrontend/quirks.go
+++ /dev/null
@@ -1,52 +0,0 @@
-package fusefrontend
-
-import (
-	"runtime"
-
-	"golang.org/x/sys/unix"
-
-	"github.com/rfjakob/gocryptfs/internal/tlog"
-)
-
-const (
-	quirkBrokenFalloc = uint64(1 << iota)
-	quirkDuplicateIno1
-)
-
-func detectQuirks(cipherdir string) (q uint64) {
-	const (
-		// From Linux' man statfs
-		BTRFS_SUPER_MAGIC = 0x9123683e
-
-		// From https://github.com/rfjakob/gocryptfs/issues/585#issuecomment-887370065
-		DARWIN_EXFAT_MAGIC = 35
-	)
-
-	var st unix.Statfs_t
-	err := unix.Statfs(cipherdir, &st)
-	if err != nil {
-		tlog.Warn.Printf("detectQuirks: Statfs on %q failed: %v", cipherdir, err)
-		return 0
-	}
-
-	logQuirk := func(s string) {
-		tlog.Info.Printf(tlog.ColorYellow + "detectQuirks: " + s + tlog.ColorReset)
-	}
-
-	// Preallocation on Btrfs is broken ( https://github.com/rfjakob/gocryptfs/issues/395 )
-	// and slow ( https://github.com/rfjakob/gocryptfs/issues/63 ).
-	//
-	// Cast to uint32 avoids compile error on arm: "constant 2435016766 overflows int32"
-	if uint32(st.Type) == BTRFS_SUPER_MAGIC {
-		logQuirk("Btrfs detected, forcing -noprealloc. See https://github.com/rfjakob/gocryptfs/issues/395 for why.")
-		q |= quirkBrokenFalloc
-	}
-	// On MacOS ExFAT, all empty files share inode number 1:
-	// https://github.com/rfjakob/gocryptfs/issues/585
-	if runtime.GOOS == "darwin" && st.Type == DARWIN_EXFAT_MAGIC {
-		logQuirk("ExFAT detected, disabling hard links. See https://github.com/rfjakob/gocryptfs/issues/585 for why.")
-		q |= quirkDuplicateIno1
-	}
-
-	return q
-}
-- 
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