From f23e38c28569716e2a770ca5f84df723449d597c Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <e.stratonikov@yadro.com>
Date: Mon, 1 Apr 2024 12:48:30 +0300
Subject: [PATCH] Revert "[#446] engine: Move to read-only on blobstor errors"

This reverts commit 69df0d21c2d5f14a28d45951c32702ceec9da759.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
---
 pkg/local_object_storage/engine/engine.go     | 34 ++++++++-----------
 pkg/local_object_storage/engine/error_test.go |  2 +-
 2 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/pkg/local_object_storage/engine/engine.go b/pkg/local_object_storage/engine/engine.go
index e03a08abc..558fe92ed 100644
--- a/pkg/local_object_storage/engine/engine.go
+++ b/pkg/local_object_storage/engine/engine.go
@@ -8,7 +8,6 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
@@ -50,7 +49,6 @@ type shardWrapper struct {
 
 type setModeRequest struct {
 	sh         *shard.Shard
-	isMeta     bool
 	errorCount uint32
 }
 
@@ -76,7 +74,7 @@ func (e *StorageEngine) setModeLoop() {
 			if !ok {
 				inProgress[sid] = struct{}{}
 				go func() {
-					e.moveToDegraded(r.sh, r.errorCount, r.isMeta)
+					e.moveToDegraded(r.sh, r.errorCount)
 
 					mtx.Lock()
 					delete(inProgress, sid)
@@ -88,7 +86,7 @@ func (e *StorageEngine) setModeLoop() {
 	}
 }
 
-func (e *StorageEngine) moveToDegraded(sh *shard.Shard, errCount uint32, isMeta bool) {
+func (e *StorageEngine) moveToDegraded(sh *shard.Shard, errCount uint32) {
 	sid := sh.ID()
 	log := e.log.With(
 		zap.Stringer("shard_id", sid),
@@ -97,23 +95,21 @@ func (e *StorageEngine) moveToDegraded(sh *shard.Shard, errCount uint32, isMeta
 	e.mtx.RLock()
 	defer e.mtx.RUnlock()
 
-	if isMeta {
-		err := sh.SetMode(mode.DegradedReadOnly)
-		if err == nil {
-			log.Info(logs.EngineShardIsMovedInDegradedModeDueToErrorThreshold)
-			return
-		}
+	err := sh.SetMode(mode.DegradedReadOnly)
+	if err != nil {
 		log.Error(logs.EngineFailedToMoveShardInDegradedreadonlyModeMovingToReadonly,
 			zap.Error(err))
-	}
 
-	err := sh.SetMode(mode.ReadOnly)
-	if err != nil {
-		log.Error(logs.EngineFailedToMoveShardInReadonlyMode, zap.Error(err))
-		return
+		err = sh.SetMode(mode.ReadOnly)
+		if err != nil {
+			log.Error(logs.EngineFailedToMoveShardInReadonlyMode,
+				zap.Error(err))
+		} else {
+			log.Info(logs.EngineShardIsMovedInReadonlyModeDueToErrorThreshold)
+		}
+	} else {
+		log.Info(logs.EngineShardIsMovedInDegradedModeDueToErrorThreshold)
 	}
-
-	log.Info(logs.EngineShardIsMovedInReadonlyModeDueToErrorThreshold)
 }
 
 // reportShardErrorBackground increases shard error counter and logs an error.
@@ -179,13 +175,11 @@ func (e *StorageEngine) reportShardErrorWithFlags(
 		return
 	}
 
-	isMeta := errors.As(err, new(metaerr.Error))
 	if block {
-		e.moveToDegraded(sh, errCount, isMeta)
+		e.moveToDegraded(sh, errCount)
 	} else {
 		req := setModeRequest{
 			errorCount: errCount,
-			isMeta:     isMeta,
 			sh:         sh,
 		}
 
diff --git a/pkg/local_object_storage/engine/error_test.go b/pkg/local_object_storage/engine/error_test.go
index 7f48da08a..ec4287bdd 100644
--- a/pkg/local_object_storage/engine/error_test.go
+++ b/pkg/local_object_storage/engine/error_test.go
@@ -153,7 +153,7 @@ func TestErrorReporting(t *testing.T) {
 		for i := uint32(0); i < 2; i++ {
 			_, err = te.ng.Get(context.Background(), GetPrm{addr: object.AddressOf(obj)})
 			require.Error(t, err)
-			checkShardState(t, te.ng, te.shards[0].id, errThreshold+i, mode.ReadOnly)
+			checkShardState(t, te.ng, te.shards[0].id, errThreshold+i, mode.DegradedReadOnly)
 			checkShardState(t, te.ng, te.shards[1].id, 0, mode.ReadWrite)
 		}