inomap: split into separate package

inomap will also be used by fusefrontend_reverse
in the future. Split if off openfiletable to make
it independent.

1 files changed, 0 insertions, 63 deletions

diff --git a/internal/openfiletable/inummap.go b/internal/openfiletable/inummap.go
deleted file mode 100644
index d9f6862..0000000
--- a/internal/openfiletable/inummap.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package openfiletable
-
-import (
-	"sync"
-	"syscall"
-)
-
-// UINT64_MAX           = 18446744073709551615
-const inumTranslateBase = 10000000000000000000
-
-// InumMap ... see NewInumMap() for description.
-type InumMap struct {
-	sync.Mutex
-	baseDev       uint64
-	translate     map[QIno]uint64
-	translateNext uint64
-}
-
-// NewInumMap returns a new inumMap.
-//
-// inumMap translates (device uint64, inode uint64) pairs to unique uint64
-// inode numbers.
-// Inode numbers on the "baseDev" are passed through unchanged (as long as they
-// are not higher than inumTranslateBase).
-// Inode numbers on other devices are remapped to the number space above
-// 10000000000000000000. The mapping is stored in a simple Go map. Entries
-// can only be added and are never removed.
-func NewInumMap(baseDev uint64) *InumMap {
-	return &InumMap{
-		baseDev:       baseDev,
-		translate:     make(map[QIno]uint64),
-		translateNext: inumTranslateBase,
-	}
-}
-
-// Translate maps the passed-in (device, inode) pair to a unique inode number.
-func (m *InumMap) Translate(in QIno) (out uint64) {
-	if in.Dev == m.baseDev && in.Ino < inumTranslateBase {
-		return in.Ino
-	}
-	m.Lock()
-	defer m.Unlock()
-	out = m.translate[in]
-	if out != 0 {
-		return out
-	}
-	out = m.translateNext
-	m.translate[in] = m.translateNext
-	m.translateNext++
-	return out
-}
-
-// TranslateStat translates the inode number contained in "st" if neccessary.
-// Convience wrapper around Translate().
-func (m *InumMap) TranslateStat(st *syscall.Stat_t) {
-	in := QInoFromStat(st)
-	st.Ino = m.Translate(in)
-}
-
-// Count returns the number of entries in the translation table.
-func (m *InumMap) Count() int {
-	return len(m.translate)
-}