[#574] core: Extend Source interface with DeletionInfo method

* Introduce common method EverExisted
* Define DeletionInfo for struct that must implement Source
* Refactor tree srv

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

cmd/frostfs-node/cache.go

@@ -142,7 +142,8 @@ func (c *lruNetCache) get(key uint64) (*netmapSDK.NetMap, error) {
 // wrapper over TTL cache of values read from the network
 // that implements container storage.
 type ttlContainerStorage struct {
-	*ttlNetCache[cid.ID, *container.Container]
+	containerCache *ttlNetCache[cid.ID, *container.Container]
+	delInfoCache   *ttlNetCache[cid.ID, *container.DelInfo]
 }
 
 func newCachedContainerStorage(v container.Source, ttl time.Duration) ttlContainerStorage {
@@ -151,18 +152,32 @@ func newCachedContainerStorage(v container.Source, ttl time.Duration) ttlContain
 	lruCnrCache := newNetworkTTLCache(containerCacheSize, ttl, func(id cid.ID) (*container.Container, error) {
 		return v.Get(id)
 	})
+	lruDelInfoCache := newNetworkTTLCache(containerCacheSize, ttl, func(id cid.ID) (*container.DelInfo, error) {
+		return v.DeletionInfo(id)
+	})
 
-	return ttlContainerStorage{lruCnrCache}
+	return ttlContainerStorage{
+		containerCache: lruCnrCache,
+		delInfoCache:   lruDelInfoCache,
+	}
 }
 
 func (s ttlContainerStorage) handleRemoval(cnr cid.ID) {
-	s.set(cnr, nil, new(apistatus.ContainerNotFound))
+	s.containerCache.set(cnr, nil, new(apistatus.ContainerNotFound))
+
+	// The removal causes the cache miss and thus deletion info (that contains
+	// ownerID and epoch) for the container will be updated from sidechain.
+	s.delInfoCache.remove(cnr)
 }
 
 // Get returns container value from the cache. If value is missing in the cache
 // or expired, then it returns value from side chain and updates the cache.
 func (s ttlContainerStorage) Get(cnr cid.ID) (*container.Container, error) {
-	return s.get(cnr)
+	return s.containerCache.get(cnr)
+}
+
+func (s ttlContainerStorage) DeletionInfo(cnr cid.ID) (*container.DelInfo, error) {
+	return s.delInfoCache.get(cnr)
 }
 
 type ttlEACLStorage struct {

cmd/frostfs-node/container.go

@@ -28,6 +28,7 @@ import (
 	containerMorph "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/container/morph"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	apiClient "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	containerSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
@@ -113,7 +114,7 @@ func configureEACLAndContainerSources(c *cfg, client *cntClient.Client, cnrSrc c
 		c.cfgObject.eaclSource = eACLFetcher
 		cnrRdr.eacl = eACLFetcher
 		c.cfgObject.cnrSource = cnrSrc
-		cnrRdr.get = cnrSrc
+		cnrRdr.src = cnrSrc
 		cnrRdr.lister = client
 	} else {
 		// use RPC node as source of Container contract items (with caching)
@@ -131,7 +132,8 @@ func configureEACLAndContainerSources(c *cfg, client *cntClient.Client, cnrSrc c
 			cnr, err := cnrSrc.Get(ev.ID)
 			if err == nil {
 				cachedContainerLister.update(cnr.Value.Owner(), ev.ID, true)
-				cachedContainerStorage.set(ev.ID, cnr, nil)
+				cachedContainerStorage.containerCache.set(ev.ID, cnr, nil)
+				cachedContainerStorage.delInfoCache.set(ev.ID, nil, new(apistatus.ContainerNotFound))
 			} else {
 				// unlike removal, we expect successful receive of the container
 				// after successful creation, so logging can be useful
@@ -159,7 +161,6 @@ func configureEACLAndContainerSources(c *cfg, client *cntClient.Client, cnrSrc c
 			}
 
 			cachedContainerStorage.handleRemoval(ev.ID)
-
 			c.log.Debug(logs.FrostFSNodeContainerRemovalEventsReceipt,
 				zap.Stringer("id", ev.ID),
 			)
@@ -170,7 +171,7 @@ func configureEACLAndContainerSources(c *cfg, client *cntClient.Client, cnrSrc c
 
 		cnrRdr.lister = cachedContainerLister
 		cnrRdr.eacl = c.cfgObject.eaclSource
-		cnrRdr.get = c.cfgObject.cnrSource
+		cnrRdr.src = c.cfgObject.cnrSource
 
 		cnrWrt.cacheEnabled = true
 		cnrWrt.eacls = cachedEACLStorage
@@ -641,7 +642,7 @@ func (c *usedSpaceService) processLoadValue(_ context.Context, a containerSDK.Si
 type morphContainerReader struct {
 	eacl containerCore.EACLSource
 
-	get containerCore.Source
+	src containerCore.Source
 
 	lister interface {
 		List(*user.ID) ([]cid.ID, error)
@@ -649,7 +650,11 @@ type morphContainerReader struct {
 }
 
 func (x *morphContainerReader) Get(id cid.ID) (*containerCore.Container, error) {
-	return x.get.Get(id)
+	return x.src.Get(id)
+}
+
+func (x *morphContainerReader) DeletionInfo(id cid.ID) (*containerCore.DelInfo, error) {
+	return x.src.DeletionInfo(id)
 }
 
 func (x *morphContainerReader) GetEACL(id cid.ID) (*containerCore.EACL, error) {

cmd/frostfs-node/tree.go

@@ -32,7 +32,7 @@ func (c cnrSource) Get(id cid.ID) (*container.Container, error) {
 }
 
 func (c cnrSource) DeletionInfo(cid cid.ID) (*container.DelInfo, error) {
-	return c.cli.DeletionInfo(cid)
+	return c.src.DeletionInfo(cid)
 }
 
 func (c cnrSource) List() ([]cid.ID, error) {