nametransform: move diriv cache into it's own package

Needs some space to grow.

renamed:    internal/nametransform/diriv_cache.go -> internal/nametransform/dirivcache/dirivcache.go

1 files changed, 0 insertions, 63 deletions

diff --git a/internal/nametransform/diriv_cache.go b/internal/nametransform/diriv_cache.go
deleted file mode 100644
index 82c5bd3..0000000
--- a/internal/nametransform/diriv_cache.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package nametransform
-
-import (
-	"sync"
-	"time"
-)
-
-// Single-entry DirIV cache. Stores the directory IV and the encrypted
-// path.
-type dirIVCache struct {
-	// Directory the DirIV belongs to
-	dir string
-	// Time the entry expires.
-	// The cached entry my become out-of-date if the ciphertext directory is
-	// modifed behind the back of gocryptfs. Having an expiry time limits the
-	// inconstency to one second, like attr_timeout does for the kernel
-	// getattr cache.
-	expiry time.Time
-
-	// The DirIV
-	iv []byte
-	// Ecrypted version of "dir"
-	cDir string
-
-	// Invalidated?
-	cleared bool
-	sync.RWMutex
-}
-
-// lookup - fetch entry for "dir" from the cache
-func (c *dirIVCache) lookup(dir string) ([]byte, string) {
-	c.RLock()
-	defer c.RUnlock()
-	if c.cleared || c.dir != dir {
-		return nil, ""
-	}
-	if time.Since(c.expiry) > 0 {
-		c.cleared = true
-		return nil, ""
-	}
-	return c.iv, c.cDir
-}
-
-// store - write entry for "dir" into the cache
-func (c *dirIVCache) store(dir string, iv []byte, cDir string) {
-	c.Lock()
-	defer c.Unlock()
-	c.cleared = false
-	c.iv = iv
-	c.dir = dir
-	c.cDir = cDir
-	// Set expiry time one second into the future
-	c.expiry = time.Now().Add(1 * time.Second)
-}
-
-// Clear ... clear the cache.
-// Exported because it is called from fusefrontend when directories are
-// renamed or deleted.
-func (c *dirIVCache) Clear() {
-	c.Lock()
-	defer c.Unlock()
-	c.cleared = true
-}