Add bucket to S3info

drivers/drivers.go

@@ -96,6 +96,8 @@ type OSInfo_StorageType int32
 type S3OSInfo struct {
 	// Host to use to connect to S3
 	Host string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
+	// Bucket where the object is stored
+	Bucket string `json:"bucket,omitempty"`
 	// Key (prefix) to use when uploading the object.
 	Key string `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
 	// POST policy that S3 owner node creates to give write access to other node.

drivers/s3.go

@@ -457,6 +457,7 @@ func (os *s3Session) GetInfo() *OSInfo {
 	oi := &OSInfo{
 		S3Info: &S3OSInfo{
 			Host:       os.host,
+			Bucket:     os.bucket,
 			Key:        os.key,
 			Policy:     os.policy,
 			Signature:  os.signature,