diff --git a/csi.proto b/csi.proto
index 8758601f..f9f522c9 100644
--- a/csi.proto
+++ b/csi.proto
@@ -141,6 +141,20 @@ message PluginCapability {
       // returned by NodeGetInfo to ensure that a given volume is
       // accessible from a given node when scheduling workloads.
       VOLUME_ACCESSIBILITY_CONSTRAINTS = 2;
+
+      // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS indicates that the snapshots
+      // for this plugin may not be equally accessible by all nodes in
+      // the cluster. The topology for a snapshot is different from that
+      // for a volume. The accessibility of a snapshot is only relevant
+      // to a node if a volume is created from a snapshot as part of a
+      // workload. The CO MUST use the topology information returned by
+      // CreateVolumeRequest and the topology information returned by
+      // CreateSnapshotResponse if the snapshot is the source of the
+      // volume, along with the topology information returned by
+      // NodeGetInfo to ensure that a given volume and its source
+      // snapshot are accessible from a given node when scheduling
+      // workloads.
+      SNAPSHOT_ACCESSIBILITY_CONSTRAINTS = 3;
     }
     Type type = 1;
   }
@@ -480,8 +494,10 @@ message Volume {
 }
 
 message TopologyRequirement {
-  // Specifies the list of topologies the provisioned volume MUST be
+  // Specifies the list of topologies the provisioned resource MUST be
   // accessible from.
+  // The resource can be either a volume or a snapshot. The examples
+  // given below use volume but can be applied to snapshot as well.
   // This field is OPTIONAL. If TopologyRequirement is specified either
   // requisite or preferred or both MUST be specified.
   // 
@@ -922,6 +938,19 @@ message CreateSnapshotRequest {
   // - Specify primary or secondary for replication systems that
   //   support snapshotting only on primary.
   map<string, string> parameters = 4;
+
+  // Specifies where (regions, zones, racks, etc.) the provisioned
+  // snapshot MUST be accessible from.
+  // An SP SHALL advertise the requirements for topological
+  // accessibility information in documentation. COs SHALL only specify
+  // topological accessibility information supported by the SP.
+  // This field is OPTIONAL.
+  // This field SHALL NOT be specified unless the SP has the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+  // If this field is not specified and the SP has the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability, the SP MAY
+  // choose where the provisioned snapshot is accessible from.
+  TopologyRequirement accessibility_requirements = 5;
 }
 
 message CreateSnapshotResponse {
@@ -966,6 +995,20 @@ message Snapshot {
   // `volume_content_source` in a `CreateVolumeRequest`. The default
   // value is false. This field is REQUIRED.
   bool ready_to_use = 5;
+
+  // Specifies where (regions, zones, racks, etc.) the provisioned
+  // snapshot is accessible from.
+  // A plugin that returns this field MUST also set the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+  // An SP MAY specify multiple topologies to indicate the snapshot is
+  // accessible from multiple locations.
+  // COs MAY use this information along with the topology information
+  // returned by CreateVolumeRequest and NodeGetInfo to ensure that a
+  // given volume and its source snapshot are accessible from a given
+  // node when scheduling workloads.
+  // This field is OPTIONAL. If it is not specified, the CO MAY assume
+  // the snapshot is equally accessible from all nodes in the cluster.
+  repeated Topology accessible_topology = 6;
 }
 message DeleteSnapshotRequest {
   // The ID of the snapshot to be deleted.
diff --git a/lib/go/csi/csi.pb.go b/lib/go/csi/csi.pb.go
index eb2e6203..56eccc19 100644
--- a/lib/go/csi/csi.pb.go
+++ b/lib/go/csi/csi.pb.go
@@ -46,24 +46,39 @@ const (
 	// returned by NodeGetInfo to ensure that a given volume is
 	// accessible from a given node when scheduling workloads.
 	PluginCapability_Service_VOLUME_ACCESSIBILITY_CONSTRAINTS PluginCapability_Service_Type = 2
+	// SNAPSHOT_ACCESSIBILITY_CONSTRAINTS indicates that the snapshots
+	// for this plugin may not be equally accessible by all nodes in
+	// the cluster. The topology for a snapshot is different from that
+	// for a volume. The accessibility of a snapshot is only relevant
+	// to a node if a volume is created from a snapshot as part of a
+	// workload. The CO MUST use the topology information returned by
+	// CreateVolumeRequest and the topology information returned by
+	// CreateSnapshotResponse if the snapshot is the source of the
+	// volume, along with the topology information returned by
+	// NodeGetInfo to ensure that a given volume and its source
+	// snapshot are accessible from a given node when scheduling
+	// workloads.
+	PluginCapability_Service_SNAPSHOT_ACCESSIBILITY_CONSTRAINTS PluginCapability_Service_Type = 3
 )
 
 var PluginCapability_Service_Type_name = map[int32]string{
 	0: "UNKNOWN",
 	1: "CONTROLLER_SERVICE",
 	2: "VOLUME_ACCESSIBILITY_CONSTRAINTS",
+	3: "SNAPSHOT_ACCESSIBILITY_CONSTRAINTS",
 }
 var PluginCapability_Service_Type_value = map[string]int32{
-	"UNKNOWN":                          0,
-	"CONTROLLER_SERVICE":               1,
-	"VOLUME_ACCESSIBILITY_CONSTRAINTS": 2,
+	"UNKNOWN":                            0,
+	"CONTROLLER_SERVICE":                 1,
+	"VOLUME_ACCESSIBILITY_CONSTRAINTS":   2,
+	"SNAPSHOT_ACCESSIBILITY_CONSTRAINTS": 3,
 }
 
 func (x PluginCapability_Service_Type) String() string {
 	return proto.EnumName(PluginCapability_Service_Type_name, int32(x))
 }
 func (PluginCapability_Service_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{4, 0, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{4, 0, 0}
 }
 
 type PluginCapability_VolumeExpansion_Type int32
@@ -124,7 +139,7 @@ func (x PluginCapability_VolumeExpansion_Type) String() string {
 	return proto.EnumName(PluginCapability_VolumeExpansion_Type_name, int32(x))
 }
 func (PluginCapability_VolumeExpansion_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{4, 1, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{4, 1, 0}
 }
 
 type VolumeCapability_AccessMode_Mode int32
@@ -168,7 +183,7 @@ func (x VolumeCapability_AccessMode_Mode) String() string {
 	return proto.EnumName(VolumeCapability_AccessMode_Mode_name, int32(x))
 }
 func (VolumeCapability_AccessMode_Mode) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{10, 2, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{10, 2, 0}
 }
 
 type ControllerServiceCapability_RPC_Type int32
@@ -226,7 +241,7 @@ func (x ControllerServiceCapability_RPC_Type) String() string {
 	return proto.EnumName(ControllerServiceCapability_RPC_Type_name, int32(x))
 }
 func (ControllerServiceCapability_RPC_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{29, 0, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{29, 0, 0}
 }
 
 type VolumeUsage_Unit int32
@@ -252,7 +267,7 @@ func (x VolumeUsage_Unit) String() string {
 	return proto.EnumName(VolumeUsage_Unit_name, int32(x))
 }
 func (VolumeUsage_Unit) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{49, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{49, 0}
 }
 
 type NodeServiceCapability_RPC_Type int32
@@ -285,7 +300,7 @@ func (x NodeServiceCapability_RPC_Type) String() string {
 	return proto.EnumName(NodeServiceCapability_RPC_Type_name, int32(x))
 }
 func (NodeServiceCapability_RPC_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{52, 0, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{52, 0, 0}
 }
 
 type GetPluginInfoRequest struct {
@@ -298,7 +313,7 @@ func (m *GetPluginInfoRequest) Reset()         { *m = GetPluginInfoRequest{} }
 func (m *GetPluginInfoRequest) String() string { return proto.CompactTextString(m) }
 func (*GetPluginInfoRequest) ProtoMessage()    {}
 func (*GetPluginInfoRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{0}
+	return fileDescriptor_csi_92531394b09ce320, []int{0}
 }
 func (m *GetPluginInfoRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetPluginInfoRequest.Unmarshal(m, b)
@@ -340,7 +355,7 @@ func (m *GetPluginInfoResponse) Reset()         { *m = GetPluginInfoResponse{} }
 func (m *GetPluginInfoResponse) String() string { return proto.CompactTextString(m) }
 func (*GetPluginInfoResponse) ProtoMessage()    {}
 func (*GetPluginInfoResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{1}
+	return fileDescriptor_csi_92531394b09ce320, []int{1}
 }
 func (m *GetPluginInfoResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetPluginInfoResponse.Unmarshal(m, b)
@@ -391,7 +406,7 @@ func (m *GetPluginCapabilitiesRequest) Reset()         { *m = GetPluginCapabilit
 func (m *GetPluginCapabilitiesRequest) String() string { return proto.CompactTextString(m) }
 func (*GetPluginCapabilitiesRequest) ProtoMessage()    {}
 func (*GetPluginCapabilitiesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{2}
+	return fileDescriptor_csi_92531394b09ce320, []int{2}
 }
 func (m *GetPluginCapabilitiesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetPluginCapabilitiesRequest.Unmarshal(m, b)
@@ -424,7 +439,7 @@ func (m *GetPluginCapabilitiesResponse) Reset()         { *m = GetPluginCapabili
 func (m *GetPluginCapabilitiesResponse) String() string { return proto.CompactTextString(m) }
 func (*GetPluginCapabilitiesResponse) ProtoMessage()    {}
 func (*GetPluginCapabilitiesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{3}
+	return fileDescriptor_csi_92531394b09ce320, []int{3}
 }
 func (m *GetPluginCapabilitiesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetPluginCapabilitiesResponse.Unmarshal(m, b)
@@ -466,7 +481,7 @@ func (m *PluginCapability) Reset()         { *m = PluginCapability{} }
 func (m *PluginCapability) String() string { return proto.CompactTextString(m) }
 func (*PluginCapability) ProtoMessage()    {}
 func (*PluginCapability) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{4}
+	return fileDescriptor_csi_92531394b09ce320, []int{4}
 }
 func (m *PluginCapability) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_PluginCapability.Unmarshal(m, b)
@@ -608,7 +623,7 @@ func (m *PluginCapability_Service) Reset()         { *m = PluginCapability_Servi
 func (m *PluginCapability_Service) String() string { return proto.CompactTextString(m) }
 func (*PluginCapability_Service) ProtoMessage()    {}
 func (*PluginCapability_Service) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{4, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{4, 0}
 }
 func (m *PluginCapability_Service) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_PluginCapability_Service.Unmarshal(m, b)
@@ -645,7 +660,7 @@ func (m *PluginCapability_VolumeExpansion) Reset()         { *m = PluginCapabili
 func (m *PluginCapability_VolumeExpansion) String() string { return proto.CompactTextString(m) }
 func (*PluginCapability_VolumeExpansion) ProtoMessage()    {}
 func (*PluginCapability_VolumeExpansion) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{4, 1}
+	return fileDescriptor_csi_92531394b09ce320, []int{4, 1}
 }
 func (m *PluginCapability_VolumeExpansion) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_PluginCapability_VolumeExpansion.Unmarshal(m, b)
@@ -675,7 +690,7 @@ func (m *ProbeRequest) Reset()         { *m = ProbeRequest{} }
 func (m *ProbeRequest) String() string { return proto.CompactTextString(m) }
 func (*ProbeRequest) ProtoMessage()    {}
 func (*ProbeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{5}
+	return fileDescriptor_csi_92531394b09ce320, []int{5}
 }
 func (m *ProbeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ProbeRequest.Unmarshal(m, b)
@@ -726,7 +741,7 @@ func (m *ProbeResponse) Reset()         { *m = ProbeResponse{} }
 func (m *ProbeResponse) String() string { return proto.CompactTextString(m) }
 func (*ProbeResponse) ProtoMessage()    {}
 func (*ProbeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{6}
+	return fileDescriptor_csi_92531394b09ce320, []int{6}
 }
 func (m *ProbeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ProbeResponse.Unmarshal(m, b)
@@ -835,7 +850,7 @@ func (m *CreateVolumeRequest) Reset()         { *m = CreateVolumeRequest{} }
 func (m *CreateVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*CreateVolumeRequest) ProtoMessage()    {}
 func (*CreateVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{7}
+	return fileDescriptor_csi_92531394b09ce320, []int{7}
 }
 func (m *CreateVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_CreateVolumeRequest.Unmarshal(m, b)
@@ -920,7 +935,7 @@ func (m *VolumeContentSource) Reset()         { *m = VolumeContentSource{} }
 func (m *VolumeContentSource) String() string { return proto.CompactTextString(m) }
 func (*VolumeContentSource) ProtoMessage()    {}
 func (*VolumeContentSource) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{8}
+	return fileDescriptor_csi_92531394b09ce320, []int{8}
 }
 func (m *VolumeContentSource) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeContentSource.Unmarshal(m, b)
@@ -1066,7 +1081,7 @@ func (m *VolumeContentSource_SnapshotSource) Reset()         { *m = VolumeConten
 func (m *VolumeContentSource_SnapshotSource) String() string { return proto.CompactTextString(m) }
 func (*VolumeContentSource_SnapshotSource) ProtoMessage()    {}
 func (*VolumeContentSource_SnapshotSource) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{8, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{8, 0}
 }
 func (m *VolumeContentSource_SnapshotSource) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeContentSource_SnapshotSource.Unmarshal(m, b)
@@ -1107,7 +1122,7 @@ func (m *VolumeContentSource_VolumeSource) Reset()         { *m = VolumeContentS
 func (m *VolumeContentSource_VolumeSource) String() string { return proto.CompactTextString(m) }
 func (*VolumeContentSource_VolumeSource) ProtoMessage()    {}
 func (*VolumeContentSource_VolumeSource) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{8, 1}
+	return fileDescriptor_csi_92531394b09ce320, []int{8, 1}
 }
 func (m *VolumeContentSource_VolumeSource) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeContentSource_VolumeSource.Unmarshal(m, b)
@@ -1148,7 +1163,7 @@ func (m *CreateVolumeResponse) Reset()         { *m = CreateVolumeResponse{} }
 func (m *CreateVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*CreateVolumeResponse) ProtoMessage()    {}
 func (*CreateVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{9}
+	return fileDescriptor_csi_92531394b09ce320, []int{9}
 }
 func (m *CreateVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_CreateVolumeResponse.Unmarshal(m, b)
@@ -1195,7 +1210,7 @@ func (m *VolumeCapability) Reset()         { *m = VolumeCapability{} }
 func (m *VolumeCapability) String() string { return proto.CompactTextString(m) }
 func (*VolumeCapability) ProtoMessage()    {}
 func (*VolumeCapability) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{10}
+	return fileDescriptor_csi_92531394b09ce320, []int{10}
 }
 func (m *VolumeCapability) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeCapability.Unmarshal(m, b)
@@ -1344,7 +1359,7 @@ func (m *VolumeCapability_BlockVolume) Reset()         { *m = VolumeCapability_B
 func (m *VolumeCapability_BlockVolume) String() string { return proto.CompactTextString(m) }
 func (*VolumeCapability_BlockVolume) ProtoMessage()    {}
 func (*VolumeCapability_BlockVolume) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{10, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{10, 0}
 }
 func (m *VolumeCapability_BlockVolume) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeCapability_BlockVolume.Unmarshal(m, b)
@@ -1384,7 +1399,7 @@ func (m *VolumeCapability_MountVolume) Reset()         { *m = VolumeCapability_M
 func (m *VolumeCapability_MountVolume) String() string { return proto.CompactTextString(m) }
 func (*VolumeCapability_MountVolume) ProtoMessage()    {}
 func (*VolumeCapability_MountVolume) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{10, 1}
+	return fileDescriptor_csi_92531394b09ce320, []int{10, 1}
 }
 func (m *VolumeCapability_MountVolume) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeCapability_MountVolume.Unmarshal(m, b)
@@ -1431,7 +1446,7 @@ func (m *VolumeCapability_AccessMode) Reset()         { *m = VolumeCapability_Ac
 func (m *VolumeCapability_AccessMode) String() string { return proto.CompactTextString(m) }
 func (*VolumeCapability_AccessMode) ProtoMessage()    {}
 func (*VolumeCapability_AccessMode) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{10, 2}
+	return fileDescriptor_csi_92531394b09ce320, []int{10, 2}
 }
 func (m *VolumeCapability_AccessMode) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeCapability_AccessMode.Unmarshal(m, b)
@@ -1479,7 +1494,7 @@ func (m *CapacityRange) Reset()         { *m = CapacityRange{} }
 func (m *CapacityRange) String() string { return proto.CompactTextString(m) }
 func (*CapacityRange) ProtoMessage()    {}
 func (*CapacityRange) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{11}
+	return fileDescriptor_csi_92531394b09ce320, []int{11}
 }
 func (m *CapacityRange) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_CapacityRange.Unmarshal(m, b)
@@ -1584,7 +1599,7 @@ func (m *Volume) Reset()         { *m = Volume{} }
 func (m *Volume) String() string { return proto.CompactTextString(m) }
 func (*Volume) ProtoMessage()    {}
 func (*Volume) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{12}
+	return fileDescriptor_csi_92531394b09ce320, []int{12}
 }
 func (m *Volume) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Volume.Unmarshal(m, b)
@@ -1640,8 +1655,10 @@ func (m *Volume) GetAccessibleTopology() []*Topology {
 }
 
 type TopologyRequirement struct {
-	// Specifies the list of topologies the provisioned volume MUST be
+	// Specifies the list of topologies the provisioned resource MUST be
 	// accessible from.
+	// The resource can be either a volume or a snapshot. The examples
+	// given below use volume but can be applied to snapshot as well.
 	// This field is OPTIONAL. If TopologyRequirement is specified either
 	// requisite or preferred or both MUST be specified.
 	//
@@ -1776,7 +1793,7 @@ func (m *TopologyRequirement) Reset()         { *m = TopologyRequirement{} }
 func (m *TopologyRequirement) String() string { return proto.CompactTextString(m) }
 func (*TopologyRequirement) ProtoMessage()    {}
 func (*TopologyRequirement) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{13}
+	return fileDescriptor_csi_92531394b09ce320, []int{13}
 }
 func (m *TopologyRequirement) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_TopologyRequirement.Unmarshal(m, b)
@@ -1850,7 +1867,7 @@ func (m *Topology) Reset()         { *m = Topology{} }
 func (m *Topology) String() string { return proto.CompactTextString(m) }
 func (*Topology) ProtoMessage()    {}
 func (*Topology) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{14}
+	return fileDescriptor_csi_92531394b09ce320, []int{14}
 }
 func (m *Topology) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Topology.Unmarshal(m, b)
@@ -1894,7 +1911,7 @@ func (m *DeleteVolumeRequest) Reset()         { *m = DeleteVolumeRequest{} }
 func (m *DeleteVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*DeleteVolumeRequest) ProtoMessage()    {}
 func (*DeleteVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{15}
+	return fileDescriptor_csi_92531394b09ce320, []int{15}
 }
 func (m *DeleteVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_DeleteVolumeRequest.Unmarshal(m, b)
@@ -1938,7 +1955,7 @@ func (m *DeleteVolumeResponse) Reset()         { *m = DeleteVolumeResponse{} }
 func (m *DeleteVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*DeleteVolumeResponse) ProtoMessage()    {}
 func (*DeleteVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{16}
+	return fileDescriptor_csi_92531394b09ce320, []int{16}
 }
 func (m *DeleteVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_DeleteVolumeResponse.Unmarshal(m, b)
@@ -1992,7 +2009,7 @@ func (m *ControllerPublishVolumeRequest) Reset()         { *m = ControllerPublis
 func (m *ControllerPublishVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*ControllerPublishVolumeRequest) ProtoMessage()    {}
 func (*ControllerPublishVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{17}
+	return fileDescriptor_csi_92531394b09ce320, []int{17}
 }
 func (m *ControllerPublishVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerPublishVolumeRequest.Unmarshal(m, b)
@@ -2078,7 +2095,7 @@ func (m *ControllerPublishVolumeResponse) Reset()         { *m = ControllerPubli
 func (m *ControllerPublishVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*ControllerPublishVolumeResponse) ProtoMessage()    {}
 func (*ControllerPublishVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{18}
+	return fileDescriptor_csi_92531394b09ce320, []int{18}
 }
 func (m *ControllerPublishVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerPublishVolumeResponse.Unmarshal(m, b)
@@ -2129,7 +2146,7 @@ func (m *ControllerUnpublishVolumeRequest) Reset()         { *m = ControllerUnpu
 func (m *ControllerUnpublishVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*ControllerUnpublishVolumeRequest) ProtoMessage()    {}
 func (*ControllerUnpublishVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{19}
+	return fileDescriptor_csi_92531394b09ce320, []int{19}
 }
 func (m *ControllerUnpublishVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerUnpublishVolumeRequest.Unmarshal(m, b)
@@ -2180,7 +2197,7 @@ func (m *ControllerUnpublishVolumeResponse) Reset()         { *m = ControllerUnp
 func (m *ControllerUnpublishVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*ControllerUnpublishVolumeResponse) ProtoMessage()    {}
 func (*ControllerUnpublishVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{20}
+	return fileDescriptor_csi_92531394b09ce320, []int{20}
 }
 func (m *ControllerUnpublishVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerUnpublishVolumeResponse.Unmarshal(m, b)
@@ -2227,7 +2244,7 @@ func (m *ValidateVolumeCapabilitiesRequest) Reset()         { *m = ValidateVolum
 func (m *ValidateVolumeCapabilitiesRequest) String() string { return proto.CompactTextString(m) }
 func (*ValidateVolumeCapabilitiesRequest) ProtoMessage()    {}
 func (*ValidateVolumeCapabilitiesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{21}
+	return fileDescriptor_csi_92531394b09ce320, []int{21}
 }
 func (m *ValidateVolumeCapabilitiesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ValidateVolumeCapabilitiesRequest.Unmarshal(m, b)
@@ -2305,7 +2322,7 @@ func (m *ValidateVolumeCapabilitiesResponse) Reset()         { *m = ValidateVolu
 func (m *ValidateVolumeCapabilitiesResponse) String() string { return proto.CompactTextString(m) }
 func (*ValidateVolumeCapabilitiesResponse) ProtoMessage()    {}
 func (*ValidateVolumeCapabilitiesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{22}
+	return fileDescriptor_csi_92531394b09ce320, []int{22}
 }
 func (m *ValidateVolumeCapabilitiesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ValidateVolumeCapabilitiesResponse.Unmarshal(m, b)
@@ -2362,7 +2379,7 @@ func (m *ValidateVolumeCapabilitiesResponse_Confirmed) String() string {
 }
 func (*ValidateVolumeCapabilitiesResponse_Confirmed) ProtoMessage() {}
 func (*ValidateVolumeCapabilitiesResponse_Confirmed) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{22, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{22, 0}
 }
 func (m *ValidateVolumeCapabilitiesResponse_Confirmed) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ValidateVolumeCapabilitiesResponse_Confirmed.Unmarshal(m, b)
@@ -2427,7 +2444,7 @@ func (m *ListVolumesRequest) Reset()         { *m = ListVolumesRequest{} }
 func (m *ListVolumesRequest) String() string { return proto.CompactTextString(m) }
 func (*ListVolumesRequest) ProtoMessage()    {}
 func (*ListVolumesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{23}
+	return fileDescriptor_csi_92531394b09ce320, []int{23}
 }
 func (m *ListVolumesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListVolumesRequest.Unmarshal(m, b)
@@ -2479,7 +2496,7 @@ func (m *ListVolumesResponse) Reset()         { *m = ListVolumesResponse{} }
 func (m *ListVolumesResponse) String() string { return proto.CompactTextString(m) }
 func (*ListVolumesResponse) ProtoMessage()    {}
 func (*ListVolumesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{24}
+	return fileDescriptor_csi_92531394b09ce320, []int{24}
 }
 func (m *ListVolumesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListVolumesResponse.Unmarshal(m, b)
@@ -2524,7 +2541,7 @@ func (m *ListVolumesResponse_Entry) Reset()         { *m = ListVolumesResponse_E
 func (m *ListVolumesResponse_Entry) String() string { return proto.CompactTextString(m) }
 func (*ListVolumesResponse_Entry) ProtoMessage()    {}
 func (*ListVolumesResponse_Entry) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{24, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{24, 0}
 }
 func (m *ListVolumesResponse_Entry) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListVolumesResponse_Entry.Unmarshal(m, b)
@@ -2579,7 +2596,7 @@ func (m *GetCapacityRequest) Reset()         { *m = GetCapacityRequest{} }
 func (m *GetCapacityRequest) String() string { return proto.CompactTextString(m) }
 func (*GetCapacityRequest) ProtoMessage()    {}
 func (*GetCapacityRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{25}
+	return fileDescriptor_csi_92531394b09ce320, []int{25}
 }
 func (m *GetCapacityRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetCapacityRequest.Unmarshal(m, b)
@@ -2637,7 +2654,7 @@ func (m *GetCapacityResponse) Reset()         { *m = GetCapacityResponse{} }
 func (m *GetCapacityResponse) String() string { return proto.CompactTextString(m) }
 func (*GetCapacityResponse) ProtoMessage()    {}
 func (*GetCapacityResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{26}
+	return fileDescriptor_csi_92531394b09ce320, []int{26}
 }
 func (m *GetCapacityResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetCapacityResponse.Unmarshal(m, b)
@@ -2674,7 +2691,7 @@ func (m *ControllerGetCapabilitiesRequest) Reset()         { *m = ControllerGetC
 func (m *ControllerGetCapabilitiesRequest) String() string { return proto.CompactTextString(m) }
 func (*ControllerGetCapabilitiesRequest) ProtoMessage()    {}
 func (*ControllerGetCapabilitiesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{27}
+	return fileDescriptor_csi_92531394b09ce320, []int{27}
 }
 func (m *ControllerGetCapabilitiesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerGetCapabilitiesRequest.Unmarshal(m, b)
@@ -2707,7 +2724,7 @@ func (m *ControllerGetCapabilitiesResponse) Reset()         { *m = ControllerGet
 func (m *ControllerGetCapabilitiesResponse) String() string { return proto.CompactTextString(m) }
 func (*ControllerGetCapabilitiesResponse) ProtoMessage()    {}
 func (*ControllerGetCapabilitiesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{28}
+	return fileDescriptor_csi_92531394b09ce320, []int{28}
 }
 func (m *ControllerGetCapabilitiesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerGetCapabilitiesResponse.Unmarshal(m, b)
@@ -2748,7 +2765,7 @@ func (m *ControllerServiceCapability) Reset()         { *m = ControllerServiceCa
 func (m *ControllerServiceCapability) String() string { return proto.CompactTextString(m) }
 func (*ControllerServiceCapability) ProtoMessage()    {}
 func (*ControllerServiceCapability) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{29}
+	return fileDescriptor_csi_92531394b09ce320, []int{29}
 }
 func (m *ControllerServiceCapability) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerServiceCapability.Unmarshal(m, b)
@@ -2858,7 +2875,7 @@ func (m *ControllerServiceCapability_RPC) Reset()         { *m = ControllerServi
 func (m *ControllerServiceCapability_RPC) String() string { return proto.CompactTextString(m) }
 func (*ControllerServiceCapability_RPC) ProtoMessage()    {}
 func (*ControllerServiceCapability_RPC) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{29, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{29, 0}
 }
 func (m *ControllerServiceCapability_RPC) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerServiceCapability_RPC.Unmarshal(m, b)
@@ -2910,17 +2927,29 @@ type CreateSnapshotRequest struct {
 	// - Specify if the snapshot should be replicated to some place.
 	// - Specify primary or secondary for replication systems that
 	//   support snapshotting only on primary.
-	Parameters           map[string]string `protobuf:"bytes,4,rep,name=parameters,proto3" json:"parameters,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
-	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
-	XXX_unrecognized     []byte            `json:"-"`
-	XXX_sizecache        int32             `json:"-"`
+	Parameters map[string]string `protobuf:"bytes,4,rep,name=parameters,proto3" json:"parameters,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	// Specifies where (regions, zones, racks, etc.) the provisioned
+	// snapshot MUST be accessible from.
+	// An SP SHALL advertise the requirements for topological
+	// accessibility information in documentation. COs SHALL only specify
+	// topological accessibility information supported by the SP.
+	// This field is OPTIONAL.
+	// This field SHALL NOT be specified unless the SP has the
+	// SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+	// If this field is not specified and the SP has the
+	// SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability, the SP MAY
+	// choose where the provisioned snapshot is accessible from.
+	AccessibilityRequirements *TopologyRequirement `protobuf:"bytes,5,opt,name=accessibility_requirements,json=accessibilityRequirements,proto3" json:"accessibility_requirements,omitempty"`
+	XXX_NoUnkeyedLiteral      struct{}             `json:"-"`
+	XXX_unrecognized          []byte               `json:"-"`
+	XXX_sizecache             int32                `json:"-"`
 }
 
 func (m *CreateSnapshotRequest) Reset()         { *m = CreateSnapshotRequest{} }
 func (m *CreateSnapshotRequest) String() string { return proto.CompactTextString(m) }
 func (*CreateSnapshotRequest) ProtoMessage()    {}
 func (*CreateSnapshotRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{30}
+	return fileDescriptor_csi_92531394b09ce320, []int{30}
 }
 func (m *CreateSnapshotRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_CreateSnapshotRequest.Unmarshal(m, b)
@@ -2968,6 +2997,13 @@ func (m *CreateSnapshotRequest) GetParameters() map[string]string {
 	return nil
 }
 
+func (m *CreateSnapshotRequest) GetAccessibilityRequirements() *TopologyRequirement {
+	if m != nil {
+		return m.AccessibilityRequirements
+	}
+	return nil
+}
+
 type CreateSnapshotResponse struct {
 	// Contains all attributes of the newly created snapshot that are
 	// relevant to the CO along with information required by the Plugin
@@ -2982,7 +3018,7 @@ func (m *CreateSnapshotResponse) Reset()         { *m = CreateSnapshotResponse{}
 func (m *CreateSnapshotResponse) String() string { return proto.CompactTextString(m) }
 func (*CreateSnapshotResponse) ProtoMessage()    {}
 func (*CreateSnapshotResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{31}
+	return fileDescriptor_csi_92531394b09ce320, []int{31}
 }
 func (m *CreateSnapshotResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_CreateSnapshotResponse.Unmarshal(m, b)
@@ -3039,17 +3075,30 @@ type Snapshot struct {
 	// Indicates if a snapshot is ready to use as a
 	// `volume_content_source` in a `CreateVolumeRequest`. The default
 	// value is false. This field is REQUIRED.
-	ReadyToUse           bool     `protobuf:"varint,5,opt,name=ready_to_use,json=readyToUse,proto3" json:"ready_to_use,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	ReadyToUse bool `protobuf:"varint,5,opt,name=ready_to_use,json=readyToUse,proto3" json:"ready_to_use,omitempty"`
+	// Specifies where (regions, zones, racks, etc.) the provisioned
+	// snapshot is accessible from.
+	// A plugin that returns this field MUST also set the
+	// SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+	// An SP MAY specify multiple topologies to indicate the snapshot is
+	// accessible from multiple locations.
+	// COs MAY use this information along with the topology information
+	// returned by CreateVolumeRequest and NodeGetInfo to ensure that a
+	// given volume and its source snapshot are accessible from a given
+	// node when scheduling workloads.
+	// This field is OPTIONAL. If it is not specified, the CO MAY assume
+	// the snapshot is equally accessible from all nodes in the cluster.
+	AccessibleTopology   []*Topology `protobuf:"bytes,6,rep,name=accessible_topology,json=accessibleTopology,proto3" json:"accessible_topology,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
 }
 
 func (m *Snapshot) Reset()         { *m = Snapshot{} }
 func (m *Snapshot) String() string { return proto.CompactTextString(m) }
 func (*Snapshot) ProtoMessage()    {}
 func (*Snapshot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{32}
+	return fileDescriptor_csi_92531394b09ce320, []int{32}
 }
 func (m *Snapshot) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Snapshot.Unmarshal(m, b)
@@ -3104,6 +3153,13 @@ func (m *Snapshot) GetReadyToUse() bool {
 	return false
 }
 
+func (m *Snapshot) GetAccessibleTopology() []*Topology {
+	if m != nil {
+		return m.AccessibleTopology
+	}
+	return nil
+}
+
 type DeleteSnapshotRequest struct {
 	// The ID of the snapshot to be deleted.
 	// This field is REQUIRED.
@@ -3121,7 +3177,7 @@ func (m *DeleteSnapshotRequest) Reset()         { *m = DeleteSnapshotRequest{} }
 func (m *DeleteSnapshotRequest) String() string { return proto.CompactTextString(m) }
 func (*DeleteSnapshotRequest) ProtoMessage()    {}
 func (*DeleteSnapshotRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{33}
+	return fileDescriptor_csi_92531394b09ce320, []int{33}
 }
 func (m *DeleteSnapshotRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_DeleteSnapshotRequest.Unmarshal(m, b)
@@ -3165,7 +3221,7 @@ func (m *DeleteSnapshotResponse) Reset()         { *m = DeleteSnapshotResponse{}
 func (m *DeleteSnapshotResponse) String() string { return proto.CompactTextString(m) }
 func (*DeleteSnapshotResponse) ProtoMessage()    {}
 func (*DeleteSnapshotResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{34}
+	return fileDescriptor_csi_92531394b09ce320, []int{34}
 }
 func (m *DeleteSnapshotResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_DeleteSnapshotResponse.Unmarshal(m, b)
@@ -3220,7 +3276,7 @@ func (m *ListSnapshotsRequest) Reset()         { *m = ListSnapshotsRequest{} }
 func (m *ListSnapshotsRequest) String() string { return proto.CompactTextString(m) }
 func (*ListSnapshotsRequest) ProtoMessage()    {}
 func (*ListSnapshotsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{35}
+	return fileDescriptor_csi_92531394b09ce320, []int{35}
 }
 func (m *ListSnapshotsRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListSnapshotsRequest.Unmarshal(m, b)
@@ -3286,7 +3342,7 @@ func (m *ListSnapshotsResponse) Reset()         { *m = ListSnapshotsResponse{} }
 func (m *ListSnapshotsResponse) String() string { return proto.CompactTextString(m) }
 func (*ListSnapshotsResponse) ProtoMessage()    {}
 func (*ListSnapshotsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{36}
+	return fileDescriptor_csi_92531394b09ce320, []int{36}
 }
 func (m *ListSnapshotsResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListSnapshotsResponse.Unmarshal(m, b)
@@ -3331,7 +3387,7 @@ func (m *ListSnapshotsResponse_Entry) Reset()         { *m = ListSnapshotsRespon
 func (m *ListSnapshotsResponse_Entry) String() string { return proto.CompactTextString(m) }
 func (*ListSnapshotsResponse_Entry) ProtoMessage()    {}
 func (*ListSnapshotsResponse_Entry) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{36, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{36, 0}
 }
 func (m *ListSnapshotsResponse_Entry) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ListSnapshotsResponse_Entry.Unmarshal(m, b)
@@ -3376,7 +3432,7 @@ func (m *ControllerExpandVolumeRequest) Reset()         { *m = ControllerExpandV
 func (m *ControllerExpandVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*ControllerExpandVolumeRequest) ProtoMessage()    {}
 func (*ControllerExpandVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{37}
+	return fileDescriptor_csi_92531394b09ce320, []int{37}
 }
 func (m *ControllerExpandVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerExpandVolumeRequest.Unmarshal(m, b)
@@ -3433,7 +3489,7 @@ func (m *ControllerExpandVolumeResponse) Reset()         { *m = ControllerExpand
 func (m *ControllerExpandVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*ControllerExpandVolumeResponse) ProtoMessage()    {}
 func (*ControllerExpandVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{38}
+	return fileDescriptor_csi_92531394b09ce320, []int{38}
 }
 func (m *ControllerExpandVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ControllerExpandVolumeResponse.Unmarshal(m, b)
@@ -3508,7 +3564,7 @@ func (m *NodeStageVolumeRequest) Reset()         { *m = NodeStageVolumeRequest{}
 func (m *NodeStageVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeStageVolumeRequest) ProtoMessage()    {}
 func (*NodeStageVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{39}
+	return fileDescriptor_csi_92531394b09ce320, []int{39}
 }
 func (m *NodeStageVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeStageVolumeRequest.Unmarshal(m, b)
@@ -3580,7 +3636,7 @@ func (m *NodeStageVolumeResponse) Reset()         { *m = NodeStageVolumeResponse
 func (m *NodeStageVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeStageVolumeResponse) ProtoMessage()    {}
 func (*NodeStageVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{40}
+	return fileDescriptor_csi_92531394b09ce320, []int{40}
 }
 func (m *NodeStageVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeStageVolumeResponse.Unmarshal(m, b)
@@ -3616,7 +3672,7 @@ func (m *NodeUnstageVolumeRequest) Reset()         { *m = NodeUnstageVolumeReque
 func (m *NodeUnstageVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeUnstageVolumeRequest) ProtoMessage()    {}
 func (*NodeUnstageVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{41}
+	return fileDescriptor_csi_92531394b09ce320, []int{41}
 }
 func (m *NodeUnstageVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeUnstageVolumeRequest.Unmarshal(m, b)
@@ -3660,7 +3716,7 @@ func (m *NodeUnstageVolumeResponse) Reset()         { *m = NodeUnstageVolumeResp
 func (m *NodeUnstageVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeUnstageVolumeResponse) ProtoMessage()    {}
 func (*NodeUnstageVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{42}
+	return fileDescriptor_csi_92531394b09ce320, []int{42}
 }
 func (m *NodeUnstageVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeUnstageVolumeResponse.Unmarshal(m, b)
@@ -3734,7 +3790,7 @@ func (m *NodePublishVolumeRequest) Reset()         { *m = NodePublishVolumeReque
 func (m *NodePublishVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*NodePublishVolumeRequest) ProtoMessage()    {}
 func (*NodePublishVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{43}
+	return fileDescriptor_csi_92531394b09ce320, []int{43}
 }
 func (m *NodePublishVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodePublishVolumeRequest.Unmarshal(m, b)
@@ -3820,7 +3876,7 @@ func (m *NodePublishVolumeResponse) Reset()         { *m = NodePublishVolumeResp
 func (m *NodePublishVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*NodePublishVolumeResponse) ProtoMessage()    {}
 func (*NodePublishVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{44}
+	return fileDescriptor_csi_92531394b09ce320, []int{44}
 }
 func (m *NodePublishVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodePublishVolumeResponse.Unmarshal(m, b)
@@ -3857,7 +3913,7 @@ func (m *NodeUnpublishVolumeRequest) Reset()         { *m = NodeUnpublishVolumeR
 func (m *NodeUnpublishVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeUnpublishVolumeRequest) ProtoMessage()    {}
 func (*NodeUnpublishVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{45}
+	return fileDescriptor_csi_92531394b09ce320, []int{45}
 }
 func (m *NodeUnpublishVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeUnpublishVolumeRequest.Unmarshal(m, b)
@@ -3901,7 +3957,7 @@ func (m *NodeUnpublishVolumeResponse) Reset()         { *m = NodeUnpublishVolume
 func (m *NodeUnpublishVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeUnpublishVolumeResponse) ProtoMessage()    {}
 func (*NodeUnpublishVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{46}
+	return fileDescriptor_csi_92531394b09ce320, []int{46}
 }
 func (m *NodeUnpublishVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeUnpublishVolumeResponse.Unmarshal(m, b)
@@ -3939,7 +3995,7 @@ func (m *NodeGetVolumeStatsRequest) Reset()         { *m = NodeGetVolumeStatsReq
 func (m *NodeGetVolumeStatsRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeGetVolumeStatsRequest) ProtoMessage()    {}
 func (*NodeGetVolumeStatsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{47}
+	return fileDescriptor_csi_92531394b09ce320, []int{47}
 }
 func (m *NodeGetVolumeStatsRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetVolumeStatsRequest.Unmarshal(m, b)
@@ -3985,7 +4041,7 @@ func (m *NodeGetVolumeStatsResponse) Reset()         { *m = NodeGetVolumeStatsRe
 func (m *NodeGetVolumeStatsResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeGetVolumeStatsResponse) ProtoMessage()    {}
 func (*NodeGetVolumeStatsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{48}
+	return fileDescriptor_csi_92531394b09ce320, []int{48}
 }
 func (m *NodeGetVolumeStatsResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetVolumeStatsResponse.Unmarshal(m, b)
@@ -4033,7 +4089,7 @@ func (m *VolumeUsage) Reset()         { *m = VolumeUsage{} }
 func (m *VolumeUsage) String() string { return proto.CompactTextString(m) }
 func (*VolumeUsage) ProtoMessage()    {}
 func (*VolumeUsage) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{49}
+	return fileDescriptor_csi_92531394b09ce320, []int{49}
 }
 func (m *VolumeUsage) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VolumeUsage.Unmarshal(m, b)
@@ -4091,7 +4147,7 @@ func (m *NodeGetCapabilitiesRequest) Reset()         { *m = NodeGetCapabilitiesR
 func (m *NodeGetCapabilitiesRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeGetCapabilitiesRequest) ProtoMessage()    {}
 func (*NodeGetCapabilitiesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{50}
+	return fileDescriptor_csi_92531394b09ce320, []int{50}
 }
 func (m *NodeGetCapabilitiesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetCapabilitiesRequest.Unmarshal(m, b)
@@ -4124,7 +4180,7 @@ func (m *NodeGetCapabilitiesResponse) Reset()         { *m = NodeGetCapabilities
 func (m *NodeGetCapabilitiesResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeGetCapabilitiesResponse) ProtoMessage()    {}
 func (*NodeGetCapabilitiesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{51}
+	return fileDescriptor_csi_92531394b09ce320, []int{51}
 }
 func (m *NodeGetCapabilitiesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetCapabilitiesResponse.Unmarshal(m, b)
@@ -4165,7 +4221,7 @@ func (m *NodeServiceCapability) Reset()         { *m = NodeServiceCapability{} }
 func (m *NodeServiceCapability) String() string { return proto.CompactTextString(m) }
 func (*NodeServiceCapability) ProtoMessage()    {}
 func (*NodeServiceCapability) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{52}
+	return fileDescriptor_csi_92531394b09ce320, []int{52}
 }
 func (m *NodeServiceCapability) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeServiceCapability.Unmarshal(m, b)
@@ -4275,7 +4331,7 @@ func (m *NodeServiceCapability_RPC) Reset()         { *m = NodeServiceCapability
 func (m *NodeServiceCapability_RPC) String() string { return proto.CompactTextString(m) }
 func (*NodeServiceCapability_RPC) ProtoMessage()    {}
 func (*NodeServiceCapability_RPC) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{52, 0}
+	return fileDescriptor_csi_92531394b09ce320, []int{52, 0}
 }
 func (m *NodeServiceCapability_RPC) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeServiceCapability_RPC.Unmarshal(m, b)
@@ -4312,7 +4368,7 @@ func (m *NodeGetInfoRequest) Reset()         { *m = NodeGetInfoRequest{} }
 func (m *NodeGetInfoRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeGetInfoRequest) ProtoMessage()    {}
 func (*NodeGetInfoRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{53}
+	return fileDescriptor_csi_92531394b09ce320, []int{53}
 }
 func (m *NodeGetInfoRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetInfoRequest.Unmarshal(m, b)
@@ -4375,7 +4431,7 @@ func (m *NodeGetInfoResponse) Reset()         { *m = NodeGetInfoResponse{} }
 func (m *NodeGetInfoResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeGetInfoResponse) ProtoMessage()    {}
 func (*NodeGetInfoResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{54}
+	return fileDescriptor_csi_92531394b09ce320, []int{54}
 }
 func (m *NodeGetInfoResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeGetInfoResponse.Unmarshal(m, b)
@@ -4437,7 +4493,7 @@ func (m *NodeExpandVolumeRequest) Reset()         { *m = NodeExpandVolumeRequest
 func (m *NodeExpandVolumeRequest) String() string { return proto.CompactTextString(m) }
 func (*NodeExpandVolumeRequest) ProtoMessage()    {}
 func (*NodeExpandVolumeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{55}
+	return fileDescriptor_csi_92531394b09ce320, []int{55}
 }
 func (m *NodeExpandVolumeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeExpandVolumeRequest.Unmarshal(m, b)
@@ -4490,7 +4546,7 @@ func (m *NodeExpandVolumeResponse) Reset()         { *m = NodeExpandVolumeRespon
 func (m *NodeExpandVolumeResponse) String() string { return proto.CompactTextString(m) }
 func (*NodeExpandVolumeResponse) ProtoMessage()    {}
 func (*NodeExpandVolumeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_csi_0bd9c8bbafae69e2, []int{56}
+	return fileDescriptor_csi_92531394b09ce320, []int{56}
 }
 func (m *NodeExpandVolumeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_NodeExpandVolumeResponse.Unmarshal(m, b)
@@ -5492,214 +5548,215 @@ var _Node_serviceDesc = grpc.ServiceDesc{
 }
 
 func init() {
-	proto.RegisterFile("github.com/container-storage-interface/spec/csi.proto", fileDescriptor_csi_0bd9c8bbafae69e2)
-}
-
-var fileDescriptor_csi_0bd9c8bbafae69e2 = []byte{
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+	proto.RegisterFile("github.com/container-storage-interface/spec/csi.proto", fileDescriptor_csi_92531394b09ce320)
+}
+
+var fileDescriptor_csi_92531394b09ce320 = []byte{
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+	0x21, 0x8a, 0xc5, 0x15, 0xff, 0x18, 0xb2, 0xfe, 0x23, 0x18, 0x31, 0xef, 0x2b, 0xc8, 0x6d, 0xd6,
+	0xc2, 0x19, 0xfc, 0x96, 0xf1, 0xc7, 0xbf, 0x5f, 0xab, 0xa0, 0xc8, 0xbf, 0x16, 0xc9, 0xe3, 0xcd,
+	0x58, 0x9e, 0xca, 0x6b, 0x90, 0xb1, 0x86, 0xab, 0xb4, 0x41, 0xc6, 0x0a, 0x28, 0xd5, 0x84, 0xd8,
+	0xdd, 0x77, 0x01, 0x9a, 0x86, 0x22, 0x91, 0x4e, 0x13, 0xad, 0x0e, 0x41, 0xed, 0x0f, 0x14, 0xdc,
+	0x69, 0xd5, 0x7a, 0xa6, 0xa2, 0xa9, 0x46, 0xee, 0x97, 0x19, 0xbb, 0xcd, 0x9d, 0x6e, 0x1a, 0x0a,
+	0x69, 0xf8, 0xb6, 0x52, 0x4f, 0x13, 0x4d, 0x43, 0x39, 0x4c, 0xdb, 0xfc, 0x6f, 0xfe, 0x27, 0x00,
+	0x00, 0xff, 0xff, 0x2d, 0xeb, 0x7b, 0xca, 0xeb, 0x34, 0x00, 0x00,
 }
diff --git a/spec.md b/spec.md
index 7b7fdf50..cef4177a 100644
--- a/spec.md
+++ b/spec.md
@@ -551,6 +551,20 @@ message PluginCapability {
       // returned by NodeGetInfo to ensure that a given volume is
       // accessible from a given node when scheduling workloads.
       VOLUME_ACCESSIBILITY_CONSTRAINTS = 2;
+
+      // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS indicates that the snapshots
+      // for this plugin may not be equally accessible by all nodes in
+      // the cluster. The topology for a snapshot is different from that
+      // for a volume. The accessibility of a snapshot is only relevant
+      // to a node if a volume is created from a snapshot as part of a
+      // workload. The CO MUST use the topology information returned by
+      // CreateVolumeRequest and the topology information returned by
+      // CreateSnapshotResponse if the snapshot is the source of the
+      // volume, along with the topology information returned by
+      // NodeGetInfo to ensure that a given volume and its source
+      // snapshot are accessible from a given node when scheduling
+      // workloads.
+      SNAPSHOT_ACCESSIBILITY_CONSTRAINTS = 3;
     }
     Type type = 1;
   }
@@ -944,8 +958,10 @@ message Volume {
 }
 
 message TopologyRequirement {
-  // Specifies the list of topologies the provisioned volume MUST be
+  // Specifies the list of topologies the provisioned resource MUST be
   // accessible from.
+  // The resource can be either a volume or a snapshot. The examples
+  // given below use volume but can be applied to snapshot as well.
   // This field is OPTIONAL. If TopologyRequirement is specified either
   // requisite or preferred or both MUST be specified.
   // 
@@ -1597,6 +1613,19 @@ message CreateSnapshotRequest {
   // - Specify primary or secondary for replication systems that
   //   support snapshotting only on primary.
   map<string, string> parameters = 4;
+
+  // Specifies where (regions, zones, racks, etc.) the provisioned
+  // snapshot MUST be accessible from.
+  // An SP SHALL advertise the requirements for topological
+  // accessibility information in documentation. COs SHALL only specify
+  // topological accessibility information supported by the SP.
+  // This field is OPTIONAL.
+  // This field SHALL NOT be specified unless the SP has the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+  // If this field is not specified and the SP has the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability, the SP MAY
+  // choose where the provisioned snapshot is accessible from.
+  TopologyRequirement accessibility_requirements = 5;
 }
 
 message CreateSnapshotResponse {
@@ -1641,6 +1670,20 @@ message Snapshot {
   // `volume_content_source` in a `CreateVolumeRequest`. The default
   // value is false. This field is REQUIRED.
   bool ready_to_use = 5;
+
+  // Specifies where (regions, zones, racks, etc.) the provisioned
+  // snapshot is accessible from.
+  // A plugin that returns this field MUST also set the
+  // SNAPSHOT_ACCESSIBILITY_CONSTRAINTS plugin capability.
+  // An SP MAY specify multiple topologies to indicate the snapshot is
+  // accessible from multiple locations.
+  // COs MAY use this information along with the topology information
+  // returned by CreateVolumeRequest and NodeGetInfo to ensure that a
+  // given volume and its source snapshot are accessible from a given
+  // node when scheduling workloads.
+  // This field is OPTIONAL. If it is not specified, the CO MAY assume
+  // the snapshot is equally accessible from all nodes in the cluster.
+  repeated Topology accessible_topology = 6;
 }
 ```