fix: provide offset for partitions in discovered volumes

This was missing in the resource which makes rendering partitions
in the GUI hard.

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

Author: smira

api/resource/definitions/block/block.proto

@@ -42,6 +42,7 @@ message DiscoveredVolumeSpec {
   string dev_path = 17;
   string parent_dev_path = 18;
   string pretty_size = 19;
+  uint64 offset = 20;
 }
 
 // DiscoveryRefreshRequestSpec is the spec for DiscoveryRefreshRequest.

internal/app/machined/pkg/controllers/block/discovery.go

@@ -215,6 +215,7 @@ func (ctrl *DiscoveryController) rescan(ctx context.Context, r controller.Runtim
 				dv.TypedSpec().ParentDevPath = filepath.Join("/dev", device.TypedSpec().Parent)
 			}
 
+			dv.TypedSpec().Offset = 0
 			dv.TypedSpec().SetSize(info.Size)
 			dv.TypedSpec().SectorSize = info.SectorSize
 			dv.TypedSpec().IOSize = info.IOSize
@@ -238,6 +239,7 @@ func (ctrl *DiscoveryController) rescan(ctx context.Context, r controller.Runtim
 				dv.TypedSpec().Parent = id
 				dv.TypedSpec().ParentDevPath = filepath.Join("/dev", id)
 
+				dv.TypedSpec().Offset = nested.PartitionOffset
 				dv.TypedSpec().SetSize(nested.PartitionSize)
 
 				dv.TypedSpec().SectorSize = info.SectorSize

pkg/machinery/api/resource/definitions/block/block.pb.go

@@ -30,6 +30,9 @@ type DiscoveredVolumeSpec struct {
 	Parent        string `yaml:"parent,omitempty" protobuf:"16"`
 	ParentDevPath string `yaml:"parent_dev_path,omitempty" protobuf:"18"`
 
+	// Offset of the partition/volume inside Parent device (in bytes).
+	Offset uint64 `yaml:"offset" protobuf:"20"`
+
 	// Overall size of the probed device (in bytes).
 	Size       uint64 `yaml:"size" protobuf:"1"`
 	PrettySize string `yaml:"pretty_size" protobuf:"19"`

pkg/machinery/api/resource/definitions/block/block_vtproto.pb.go

@@ -5545,6 +5545,7 @@ DiscoveredVolumeSpec is the spec for DiscoveredVolumes resource.
 | dev_path | [string](#string) |  |  |
 | parent_dev_path | [string](#string) |  |  |
 | pretty_size | [string](#string) |  |  |
+| offset | [uint64](#uint64) |  |  |