From a033e5f5be87f2312b31c78a9c37f5d32a4195e8 Mon Sep 17 00:00:00 2001
From: Jim Ma <majinjing3@gmail.com>
Date: Tue, 25 May 2021 14:12:57 +0800
Subject: [PATCH] feature: remove unsafe code in client/daemon/storage (#258)

Signed-off-by: Jim Ma <majinjing3@gmail.com>
---
 client/daemon/storage/local_storage.go      | 10 +++++-----
 client/daemon/storage/local_storage_test.go |  8 +++-----
 client/daemon/storage/storage_manager.go    |  4 ++--
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/client/daemon/storage/local_storage.go b/client/daemon/storage/local_storage.go
index 963a88f42..d7fdbb67f 100644
--- a/client/daemon/storage/local_storage.go
+++ b/client/daemon/storage/local_storage.go
@@ -26,7 +26,6 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
-	"unsafe"
 
 	"d7y.io/dragonfly/v2/client/clientutil"
 	"d7y.io/dragonfly/v2/pkg/dferrors"
@@ -47,14 +46,14 @@ type localTaskStore struct {
 	metadataFilePath string
 
 	expireTime    time.Duration
-	lastAccess    *time.Time
+	lastAccess    int64
 	reclaimMarked bool
 	gcCallback    func(CommonTaskRequest)
 }
 
 func (t *localTaskStore) touch() {
-	access := time.Now()
-	atomic.SwapPointer((*unsafe.Pointer)(unsafe.Pointer(&t.lastAccess)), unsafe.Pointer(&access))
+	access := time.Now().UnixNano()
+	atomic.SwapInt64(&t.lastAccess, access)
 }
 
 func (t *localTaskStore) WritePiece(ctx context.Context, req *WritePieceRequest) (int64, error) {
@@ -246,7 +245,8 @@ func (t *localTaskStore) GetPieces(ctx context.Context, req *base.PieceTaskReque
 }
 
 func (t *localTaskStore) CanReclaim() bool {
-	return t.lastAccess.Add(t.expireTime).Before(time.Now())
+	access := time.Unix(0, t.lastAccess)
+	return access.Add(t.expireTime).Before(time.Now())
 }
 
 // MarkReclaim will try to invoke gcCallback (normal leave peer task)
diff --git a/client/daemon/storage/local_storage_test.go b/client/daemon/storage/local_storage_test.go
index fe18a2074..b6ef9da2d 100644
--- a/client/daemon/storage/local_storage_test.go
+++ b/client/daemon/storage/local_storage_test.go
@@ -164,8 +164,7 @@ func TestLocalTaskStore_PutAndGetPiece_Simple(t *testing.T) {
 	}
 
 	// clean up test data
-	access := time.Now().Add(-1 * time.Hour)
-	ts.(*localTaskStore).lastAccess = &access
+	ts.(*localTaskStore).lastAccess = time.Now().Add(-1 * time.Hour).UnixNano()
 	ok = ts.(Reclaimer).CanReclaim()
 	assert.True(ok, "task should gc")
 	err = ts.(Reclaimer).Reclaim()
@@ -201,7 +200,7 @@ func TestLocalTaskStore_StoreTaskData_Simple(t *testing.T) {
 		RWMutex:      &sync.RWMutex{},
 		dataDir:      test.DataDir,
 		metadataFile: matadata,
-		lastAccess:   &time.Time{},
+		lastAccess:   time.Now().UnixNano(),
 	}
 	err = ts.Store(context.Background(), &StoreRequest{
 		CommonTaskRequest: CommonTaskRequest{
@@ -339,8 +338,7 @@ func TestLocalTaskStore_PutAndGetPiece_Advance(t *testing.T) {
 	}
 
 	// clean up test data
-	access := time.Now().Add(-1 * time.Hour)
-	ts.(*localTaskStore).lastAccess = &access
+	ts.(*localTaskStore).lastAccess = time.Now().Add(-1 * time.Hour).UnixNano()
 	ok = ts.(Reclaimer).CanReclaim()
 	assert.True(ok, "task should gc")
 	err = ts.(Reclaimer).Reclaim()
diff --git a/client/daemon/storage/storage_manager.go b/client/daemon/storage/storage_manager.go
index fcbab4dcb..155d7be1e 100644
--- a/client/daemon/storage/storage_manager.go
+++ b/client/daemon/storage/storage_manager.go
@@ -483,13 +483,13 @@ func (s *storageManager) TryGC() (bool, error) {
 			return true
 		})
 		sort.SliceStable(tasks, func(i, j int) bool {
-			return tasks[i].lastAccess.Before(*tasks[j].lastAccess)
+			return tasks[i].lastAccess < tasks[j].lastAccess
 		})
 		for _, task := range tasks {
 			task.MarkReclaim()
 			markedTasks = append(markedTasks, PeerTaskMetaData{task.PeerID, task.TaskID})
 			logger.Infof("quota threshold reached, mark task %s/%s reclaimed, last access: %s, size: %s",
-				task.TaskID, task.PeerID, task.lastAccess.Format(time.RFC3339Nano),
+				task.TaskID, task.PeerID, time.Unix(0, task.lastAccess).Format(time.RFC3339Nano),
 				units.BytesSize(float64(task.ContentLength)))
 			totalNotMarkedSize -= task.ContentLength
 			if totalNotMarkedSize < int64(s.storeOption.DiskGCThreshold) {