add TTL support

The volume TTL and file TTL are not necessarily the same. as long as
file TTL is smaller than volume TTL, it'll be fine.

volume TTL is used when assigning file id, e.g.
http://.../dir/assign?ttl=3h

file TTL is used when uploading

1 files changed, 9 insertions, 3 deletions

diff --git a/go/operation/system_message.pb.go b/go/operation/system_message.pb.go
index 45ae8a648..9f00dd74d 100644
--- a/go/operation/system_message.pb.go
+++ b/go/operation/system_message.pb.go
@@ -15,12 +15,10 @@ It has these top-level messages:
 package operation
 
 import proto "code.google.com/p/goprotobuf/proto"
-import json "encoding/json"
 import math "math"
 
-// Reference proto, json, and math imports to suppress error if they are not otherwise used.
+// Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
-var _ = &json.SyntaxError{}
 var _ = math.Inf
 
 type VolumeInformationMessage struct {
@@ -33,6 +31,7 @@ type VolumeInformationMessage struct {
 	ReadOnly         *bool   `protobuf:"varint,7,opt,name=read_only" json:"read_only,omitempty"`
 	ReplicaPlacement *uint32 `protobuf:"varint,8,req,name=replica_placement" json:"replica_placement,omitempty"`
 	Version          *uint32 `protobuf:"varint,9,opt,name=version,def=2" json:"version,omitempty"`
+	Ttl              *uint32 `protobuf:"varint,10,opt,name=ttl" json:"ttl,omitempty"`
 	XXX_unrecognized []byte  `json:"-"`
 }
 
@@ -105,6 +104,13 @@ func (m *VolumeInformationMessage) GetVersion() uint32 {
 	return Default_VolumeInformationMessage_Version
 }
 
+func (m *VolumeInformationMessage) GetTtl() uint32 {
+	if m != nil && m.Ttl != nil {
+		return *m.Ttl
+	}
+	return 0
+}
+
 type JoinMessage struct {
 	IsInit           *bool                       `protobuf:"varint,1,opt,name=is_init" json:"is_init,omitempty"`
 	Ip               *string                     `protobuf:"bytes,2,req,name=ip" json:"ip,omitempty"`