fs: expand stats output for json log

fs/accounting/stats.go

@@ -375,7 +375,13 @@ func (s *StatsInfo) Transferred() []TransferSnapshot {
 
 // Log outputs the StatsInfo to the log
 func (s *StatsInfo) Log() {
-	fs.LogLevelPrintf(fs.Config.StatsLogLevel, nil, "%v\n", s)
+	if fs.Config.UseJSONLog {
+		out, _ := s.RemoteStats()
+		fs.LogLevelPrintf(fs.Config.StatsLogLevel, nil, "%T\n", map[string]interface{}(out))
+	} else {
+		fs.LogLevelPrintf(fs.Config.StatsLogLevel, nil, "%v\n", s)
+	}
+
 }
 
 // Bytes updates the stats for bytes bytes

fs/log.go

@@ -3,6 +3,7 @@ package fs
 import (
 	"fmt"
 	"log"
+	"strings"
 
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -86,6 +87,10 @@ func LogPrintf(level LogLevel, o interface{}, text string, args ...interface{})
 				"objectType": fmt.Sprintf("%T", o),
 			}
 		}
+		if strings.HasPrefix(out, "map[") {
+			fields["json"] = args[0]
+			out = ""
+		}
 		switch level {
 		case LogLevelDebug:
 			logrus.WithFields(fields).Debug(out)