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We don't need to store local copies of cachedResponses

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This commit is contained in:
Frank Denis 2019-11-28 22:34:02 +01:00
parent 068509ef30
commit 3e5dbee75a
1 changed files with 10 additions and 15 deletions
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25
dnscrypt-proxy/plugin_cache.go
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@ -48,7 +48,6 @@ func computeCacheKey(pluginsState *PluginsState, msg *dns.Msg) ([32]byte, error)
// ---
type PluginCache struct {
cachedResponses *CachedResponses
}
func (plugin *PluginCache) Name() string {
@ -72,18 +71,16 @@ func (plugin *PluginCache) Reload() error {
}
func (plugin *PluginCache) Eval(pluginsState *PluginsState, msg *dns.Msg) error {
plugin.cachedResponses = &cachedResponses
cacheKey, err := computeCacheKey(pluginsState, msg)
if err != nil {
return nil
}
plugin.cachedResponses.RLock()
defer plugin.cachedResponses.RUnlock()
if plugin.cachedResponses.cache == nil {
cachedResponses.RLock()
defer cachedResponses.RUnlock()
if cachedResponses.cache == nil {
return nil
}
cachedAny, ok := plugin.cachedResponses.cache.Get(cacheKey)
cachedAny, ok := cachedResponses.cache.Get(cacheKey)
if !ok {
return nil
}
@ -108,7 +105,6 @@ func (plugin *PluginCache) Eval(pluginsState *PluginsState, msg *dns.Msg) error
// ---
type PluginCacheResponse struct {
cachedResponses *CachedResponses
}
func (plugin *PluginCacheResponse) Name() string {
@ -132,7 +128,6 @@ func (plugin *PluginCacheResponse) Reload() error {
}
func (plugin *PluginCacheResponse) Eval(pluginsState *PluginsState, msg *dns.Msg) error {
plugin.cachedResponses = &cachedResponses
if msg.Rcode != dns.RcodeSuccess && msg.Rcode != dns.RcodeNameError && msg.Rcode != dns.RcodeNotAuth {
return nil
}
@ -148,16 +143,16 @@ func (plugin *PluginCacheResponse) Eval(pluginsState *PluginsState, msg *dns.Msg
expiration: time.Now().Add(ttl),
msg: *msg,
}
plugin.cachedResponses.Lock()
if plugin.cachedResponses.cache == nil {
plugin.cachedResponses.cache, err = lru.NewARC(pluginsState.cacheSize)
cachedResponses.Lock()
if cachedResponses.cache == nil {
cachedResponses.cache, err = lru.NewARC(pluginsState.cacheSize)
if err != nil {
plugin.cachedResponses.Unlock()
cachedResponses.Unlock()
return err
}
}
plugin.cachedResponses.cache.Add(cacheKey, cachedResponse)
plugin.cachedResponses.Unlock()
cachedResponses.cache.Add(cacheKey, cachedResponse)
cachedResponses.Unlock()
updateTTL(msg, cachedResponse.expiration)
return nil