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authorJakob Unterwurzacher2017-08-06 21:59:15 +0200
committerJakob Unterwurzacher2017-08-06 21:59:15 +0200
commit5190cc09bbc8afca75986dbb14f09e62eda33b61 (patch)
tree37e5d9fc3febd063e9c09dc44dfbdaefd300a9c3 /internal/nametransform/diriv_cache.go
parent32611ff97afacb6525015ed322645e12bd296380 (diff)
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
Diffstat (limited to 'internal/nametransform/diriv_cache.go')
-rw-r--r--internal/nametransform/diriv_cache.go63
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- // The cached entry my become out-of-date if the ciphertext directory is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
-}