diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 85b6bad..ef9c6ec 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -17,7 +17,7 @@ jobs:
         with:
           go-version: 1.21
       - name: Lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6
         with:
           version: latest
   build:
diff --git a/.golangci.yaml b/.golangci.yaml
index 0b27a7c..3569c62 100644
--- a/.golangci.yaml
+++ b/.golangci.yaml
@@ -18,7 +18,7 @@ linters:
     - dogsled
     - errname
     - errorlint
-    - exportloopref
+    - copyloopvar
     - forcetypeassert
     - gocognit
     - goconst
diff --git a/deprecated/v1/sifi/sifi.go b/deprecated/v1/sifi/sifi.go
index aa32b9b..821803d 100644
--- a/deprecated/v1/sifi/sifi.go
+++ b/deprecated/v1/sifi/sifi.go
@@ -17,8 +17,10 @@ import (
 )
 
 const (
-	PortNumber  = 7434    // PortNumber is the default port for `sifid` (sifi on a keypad).
-	ServiceName = "sifid" // ServiceName is the public name of the SIFI service.
+	// PortNumber is the default port for `sifid` (sifi on a keypad).
+	PortNumber = 7434
+	// ServiceName is the public name of the SIFI service.
+	ServiceName = "sifid"
 )
 
 // path returns a URL path with the correct prefix appended.
diff --git a/manifold/manifold.go b/manifold/manifold.go
index 9e069af..e9567c6 100644
--- a/manifold/manifold.go
+++ b/manifold/manifold.go
@@ -5,8 +5,12 @@
 package manifold
 
 const (
-	APIPrefix   = "/manifold-api" // APIPrefix is the prefix for all API paths.
-	APIVersion  = "v3-preview"    // APIVersion is the prefix for all API paths (without the leading slash).
-	PortNumber  = 7434            // PortNumber is the default port for `sifid` (sifi on a keypad).
-	ServiceName = "sifid"         // ServiceName is the public name of the manifold-api service.
+	// APIPrefix is the prefix for all API paths.
+	APIPrefix = "/manifold-api"
+	// APIVersion is the prefix for all API paths (without the leading slash).
+	APIVersion = "v3-preview"
+	// PortNumber is the default port for `sifid` (sifi on a keypad).
+	PortNumber = 7434
+	// ServiceName is the public name of the manifold-api service.
+	ServiceName = "sifid"
 )
diff --git a/metal/responses.go b/metal/responses.go
index 4a222cc..d086a79 100644
--- a/metal/responses.go
+++ b/metal/responses.go
@@ -212,7 +212,12 @@ type NetInterfaceInfo struct {
 	MAC          string   `json:"mac"`        // The network's MAC address
 	MTU          uint16   `json:"mtu"`        // The network's maximum transmission unit
 	LinkSpeedMbs uint     `json:"link_speed_Mbs"`
-	Link         bool     `json:"link"`
+	Link         bool     `json:"link"`      // true when the link status is up
+	VendorID     string   `json:"vendor_id"` // the link device Vendor ID (from e.g PCI info)
+	DeviceID     string   `json:"device_id"` // the link device ID (from e.g PCI info)
+	Vendor       string   `json:"vendor"`    // the link device vendor (name)
+	Device       string   `json:"device"`    // the link device (name)
+	BusInfo      string   `json:"bus_info"`  // the link bus info/address (from e.g PCI info)
 }
 
 // BcacheInfo is the information we can get for a single bcache device.
diff --git a/upload/service.go b/upload/service.go
index e6654fd..e3a7c94 100644
--- a/upload/service.go
+++ b/upload/service.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -106,7 +107,11 @@ func (s Service) Upload(ctx context.Context, path string) (*UploadResponse, erro
 	}
 
 	upload.Offset = status.Offset
-	upload.Completed = int64(status.Offset) == stat.Size()
+	size := stat.Size()
+	if size < 0 {
+		return nil, errors.New("invalid stat.Size()")
+	}
+	upload.Completed = (status.Offset == uint64(size))
 
 	return &upload, nil
 }
@@ -130,15 +135,24 @@ func (s Service) Resume(ctx context.Context, id, path string) (*ResumeResponse,
 	}
 	defer fin.Close()
 
+	if status.Offset > math.MaxInt64 {
+		return nil, errors.New("offset too large")
+	}
+
 	status, err = s.upload(ctx, id, int64(status.Offset), fin)
 	if err != nil {
 		return nil, err
 	}
 
+	size := stat.Size()
+	if size < 0 {
+		return nil, errors.New("invalid stat.Size()")
+	}
+
 	resume := ResumeResponse{
 		Version:   status.Version,
 		Offset:    status.Offset,
-		Completed: int64(status.Offset) == stat.Size(),
+		Completed: status.Offset == uint64(size),
 	}
 
 	return &resume, nil