From 488111ce390218806fca933b89279b766f7ff49c Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 12 Apr 2020 17:15:03 +0200
Subject: inomap: split into separate package

inomap will also be used by fusefrontend_reverse
in the future. Split if off openfiletable to make
it independent.
---
 internal/inomap/qino.go | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 internal/inomap/qino.go

(limited to 'internal/inomap/qino.go')

diff --git a/internal/inomap/qino.go b/internal/inomap/qino.go
new file mode 100644
index 0000000..8f99004
--- /dev/null
+++ b/internal/inomap/qino.go
@@ -0,0 +1,25 @@
+package inomap
+
+import (
+	"syscall"
+)
+
+// QIno = Qualified Inode number.
+// Uniquely identifies a backing file through the device number,
+// inode number pair.
+type QIno struct {
+	// Stat_t.{Dev,Ino} is uint64 on 32- and 64-bit Linux
+	Dev uint64
+	Ino uint64
+}
+
+// QInoFromStat fills a new QIno struct with the passed Stat_t info.
+func QInoFromStat(st *syscall.Stat_t) QIno {
+	return QIno{
+		// There are some architectures that use 32-bit values here
+		// (darwin, freebsd-32, maybe others). Add and explicit cast to make
+		// this function work everywhere.
+		Dev: uint64(st.Dev),
+		Ino: uint64(st.Ino),
+	}
+}
-- 
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