Change replication to use read lock instead of writelock (#12581)

Fixes #12573

This PR also adding audit logging for replication activity

cmd/utils.go

@@ -48,6 +48,7 @@ import (
 	"github.com/minio/minio/internal/handlers"
 	xhttp "github.com/minio/minio/internal/http"
 	"github.com/minio/minio/internal/logger"
+	"github.com/minio/minio/internal/logger/message/audit"
 	"github.com/minio/minio/internal/rest"
 	"github.com/minio/pkg/certs"
 )
@@ -940,3 +941,27 @@ func totalNodeCount() uint64 {
 	}
 	return totalNodesCount
 }
+
+// AuditLogOptions takes options for audit logging subsystem activity
+type AuditLogOptions struct {
+	Trigger   string
+	APIName   string
+	Status    string
+	VersionID string
+}
+
+// sends audit logs for internal subsystem activity
+func auditLogInternal(ctx context.Context, bucket, object string, opts AuditLogOptions) {
+	entry := audit.NewEntry(globalDeploymentID)
+	entry.Trigger = opts.Trigger
+	entry.API.Name = opts.APIName
+	entry.API.Bucket = bucket
+	entry.API.Object = object
+	if opts.VersionID != "" {
+		entry.ReqQuery = make(map[string]string)
+		entry.ReqQuery[xhttp.VersionID] = opts.VersionID
+	}
+	entry.API.Status = opts.Status
+	ctx = logger.SetAuditEntry(ctx, &entry)
+	logger.AuditLog(ctx, nil, nil, nil)
+}