add input seed

cmd/swarm/swarm-smoke/main.go

@@ -40,6 +40,7 @@ var (
 	allhosts     string
 	hosts        []string
 	filesize     int
+	inputSeed    int
 	syncDelay    int
 	httpPort     int
 	wsPort       int
@@ -74,6 +75,12 @@ func main() {
 			Usage:       "ws port",
 			Destination: &wsPort,
 		},
+		cli.IntFlag{
+			Name:        "seed",
+			Value:       0,
+			Usage:       "input seed in case we need deterministic upload",
+			Destination: &inputSeed,
+		},
 		cli.IntFlag{
 			Name:        "filesize",
 			Value:       1024,

cmd/swarm/swarm-smoke/upload_and_sync.go

@@ -39,6 +39,11 @@ import (
 )
 
 func uploadAndSyncCmd(ctx *cli.Context, tuid string) error {
+	// use input seed if it has been set
+	if inputSeed != 0 {
+		seed = inputSeed
+	}
+
 	randomBytes := testutil.RandomBytes(seed, filesize*1000)
 
 	errc := make(chan error)