go.mod: bump all deps

Bump all transitive and direct dependencies.

Signed-off-by: Casey Callendrello <c1@caseyc.net>

vendor/github.com/vishvananda/netns/.golangci.yml

@@ -0,0 +1,2 @@
+run:
+  timeout: 5m

vendor/github.com/vishvananda/netns/README.md

@@ -23,6 +23,7 @@ import (
     "fmt"
     "net"
     "runtime"
+
     "github.com/vishvananda/netns"
 )
 
@@ -48,14 +49,3 @@ func main() {
 }
 
 ```
-
-## NOTE
-
-The library can be safely used only with Go >= 1.10 due to [golang/go#20676](https://github.com/golang/go/issues/20676).
-
-After locking a goroutine to its current OS thread with `runtime.LockOSThread()`
-and changing its network namespace, any new subsequent goroutine won't be
-scheduled on that thread while it's locked. Therefore, the new goroutine
-will run in a different namespace leading to unexpected results.
-
-See [here](https://www.weave.works/blog/linux-namespaces-golang-followup) for more details.

vendor/github.com/vishvananda/netns/doc.go

@@ -0,0 +1,9 @@
+// Package netns allows ultra-simple network namespace handling. NsHandles
+// can be retrieved and set. Note that the current namespace is thread
+// local so actions that set and reset namespaces should use LockOSThread
+// to make sure the namespace doesn't change due to a goroutine switch.
+// It is best to close NsHandles when you are done with them. This can be
+// accomplished via a `defer ns.Close()` on the handle. Changing namespaces
+// requires elevated privileges, so in most cases this code needs to be run
+// as root.
+package netns

vendor/github.com/vishvananda/netns/netns_linux.go

@@ -1,33 +1,31 @@
-// +build linux,go1.10
-
 package netns
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
 	"strconv"
 	"strings"
-	"syscall"
 
 	"golang.org/x/sys/unix"
 )
 
-// Deprecated: use syscall pkg instead (go >= 1.5 needed).
+// Deprecated: use golang.org/x/sys/unix pkg instead.
 const (
-	CLONE_NEWUTS  = 0x04000000   /* New utsname group? */
-	CLONE_NEWIPC  = 0x08000000   /* New ipcs */
-	CLONE_NEWUSER = 0x10000000   /* New user namespace */
-	CLONE_NEWPID  = 0x20000000   /* New pid namespace */
-	CLONE_NEWNET  = 0x40000000   /* New network namespace */
-	CLONE_IO      = 0x80000000   /* Get io context */
-	bindMountPath = "/run/netns" /* Bind mount path for named netns */
+	CLONE_NEWUTS  = unix.CLONE_NEWUTS  /* New utsname group? */
+	CLONE_NEWIPC  = unix.CLONE_NEWIPC  /* New ipcs */
+	CLONE_NEWUSER = unix.CLONE_NEWUSER /* New user namespace */
+	CLONE_NEWPID  = unix.CLONE_NEWPID  /* New pid namespace */
+	CLONE_NEWNET  = unix.CLONE_NEWNET  /* New network namespace */
+	CLONE_IO      = unix.CLONE_IO      /* Get io context */
 )
 
-// Setns sets namespace using syscall. Note that this should be a method
-// in syscall but it has not been added.
+const bindMountPath = "/run/netns" /* Bind mount path for named netns */
+
+// Setns sets namespace using golang.org/x/sys/unix.Setns.
+//
+// Deprecated: Use golang.org/x/sys/unix.Setns instead.
 func Setns(ns NsHandle, nstype int) (err error) {
 	return unix.Setns(int(ns), nstype)
 }
@@ -35,19 +33,20 @@ func Setns(ns NsHandle, nstype int) (err error) {
 // Set sets the current network namespace to the namespace represented
 // by NsHandle.
 func Set(ns NsHandle) (err error) {
-	return Setns(ns, CLONE_NEWNET)
+	return unix.Setns(int(ns), unix.CLONE_NEWNET)
 }
 
 // New creates a new network namespace, sets it as current and returns
 // a handle to it.
 func New() (ns NsHandle, err error) {
-	if err := unix.Unshare(CLONE_NEWNET); err != nil {
+	if err := unix.Unshare(unix.CLONE_NEWNET); err != nil {
 		return -1, err
 	}
 	return Get()
 }
 
-// NewNamed creates a new named network namespace and returns a handle to it
+// NewNamed creates a new named network namespace, sets it as current,
+// and returns a handle to it
 func NewNamed(name string) (NsHandle, error) {
 	if _, err := os.Stat(bindMountPath); os.IsNotExist(err) {
 		err = os.MkdirAll(bindMountPath, 0755)
@@ -65,13 +64,15 @@ func NewNamed(name string) (NsHandle, error) {
 
 	f, err := os.OpenFile(namedPath, os.O_CREATE|os.O_EXCL, 0444)
 	if err != nil {
+		newNs.Close()
 		return None(), err
 	}
 	f.Close()
 
-	nsPath := fmt.Sprintf("/proc/%d/task/%d/ns/net", os.Getpid(), syscall.Gettid())
-	err = syscall.Mount(nsPath, namedPath, "bind", syscall.MS_BIND, "")
+	nsPath := fmt.Sprintf("/proc/%d/task/%d/ns/net", os.Getpid(), unix.Gettid())
+	err = unix.Mount(nsPath, namedPath, "bind", unix.MS_BIND, "")
 	if err != nil {
+		newNs.Close()
 		return None(), err
 	}
 
@@ -82,7 +83,7 @@ func NewNamed(name string) (NsHandle, error) {
 func DeleteNamed(name string) error {
 	namedPath := path.Join(bindMountPath, name)
 
-	err := syscall.Unmount(namedPath, syscall.MNT_DETACH)
+	err := unix.Unmount(namedPath, unix.MNT_DETACH)
 	if err != nil {
 		return err
 	}
@@ -108,7 +109,7 @@ func GetFromPath(path string) (NsHandle, error) {
 // GetFromName gets a handle to a named network namespace such as one
 // created by `ip netns add`.
 func GetFromName(name string) (NsHandle, error) {
-	return GetFromPath(fmt.Sprintf("/var/run/netns/%s", name))
+	return GetFromPath(filepath.Join(bindMountPath, name))
 }
 
 // GetFromPid gets a handle to the network namespace of a given pid.
@@ -133,33 +134,38 @@ func GetFromDocker(id string) (NsHandle, error) {
 }
 
 // borrowed from docker/utils/utils.go
-func findCgroupMountpoint(cgroupType string) (string, error) {
-	output, err := ioutil.ReadFile("/proc/mounts")
+func findCgroupMountpoint(cgroupType string) (int, string, error) {
+	output, err := os.ReadFile("/proc/mounts")
 	if err != nil {
-		return "", err
+		return -1, "", err
 	}
 
 	// /proc/mounts has 6 fields per line, one mount per line, e.g.
 	// cgroup /sys/fs/cgroup/devices cgroup rw,relatime,devices 0 0
 	for _, line := range strings.Split(string(output), "\n") {
 		parts := strings.Split(line, " ")
-		if len(parts) == 6 && parts[2] == "cgroup" {
-			for _, opt := range strings.Split(parts[3], ",") {
-				if opt == cgroupType {
-					return parts[1], nil
+		if len(parts) == 6 {
+			switch parts[2] {
+			case "cgroup2":
+				return 2, parts[1], nil
+			case "cgroup":
+				for _, opt := range strings.Split(parts[3], ",") {
+					if opt == cgroupType {
+						return 1, parts[1], nil
+					}
 				}
 			}
 		}
 	}
 
-	return "", fmt.Errorf("cgroup mountpoint not found for %s", cgroupType)
+	return -1, "", fmt.Errorf("cgroup mountpoint not found for %s", cgroupType)
 }
 
 // Returns the relative path to the cgroup docker is running in.
 // borrowed from docker/utils/utils.go
 // modified to get the docker pid instead of using /proc/self
-func getThisCgroup(cgroupType string) (string, error) {
-	dockerpid, err := ioutil.ReadFile("/var/run/docker.pid")
+func getDockerCgroup(cgroupVer int, cgroupType string) (string, error) {
+	dockerpid, err := os.ReadFile("/var/run/docker.pid")
 	if err != nil {
 		return "", err
 	}
@@ -171,14 +177,15 @@ func getThisCgroup(cgroupType string) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	output, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/cgroup", pid))
+	output, err := os.ReadFile(fmt.Sprintf("/proc/%d/cgroup", pid))
 	if err != nil {
 		return "", err
 	}
 	for _, line := range strings.Split(string(output), "\n") {
 		parts := strings.Split(line, ":")
 		// any type used by docker should work
-		if parts[1] == cgroupType {
+		if (cgroupVer == 1 && parts[1] == cgroupType) ||
+			(cgroupVer == 2 && parts[1] == "") {
 			return parts[2], nil
 		}
 	}
@@ -190,46 +197,56 @@ func getThisCgroup(cgroupType string) (string, error) {
 // modified to only return the first pid
 // modified to glob with id
 // modified to search for newer docker containers
+// modified to look for cgroups v2
 func getPidForContainer(id string) (int, error) {
 	pid := 0
 
 	// memory is chosen randomly, any cgroup used by docker works
 	cgroupType := "memory"
 
-	cgroupRoot, err := findCgroupMountpoint(cgroupType)
+	cgroupVer, cgroupRoot, err := findCgroupMountpoint(cgroupType)
 	if err != nil {
 		return pid, err
 	}
 
-	cgroupThis, err := getThisCgroup(cgroupType)
+	cgroupDocker, err := getDockerCgroup(cgroupVer, cgroupType)
 	if err != nil {
 		return pid, err
 	}
 
 	id += "*"
 
+	var pidFile string
+	if cgroupVer == 1 {
+		pidFile = "tasks"
+	} else if cgroupVer == 2 {
+		pidFile = "cgroup.procs"
+	} else {
+		return -1, fmt.Errorf("Invalid cgroup version '%d'", cgroupVer)
+	}
+
 	attempts := []string{
-		filepath.Join(cgroupRoot, cgroupThis, id, "tasks"),
+		filepath.Join(cgroupRoot, cgroupDocker, id, pidFile),
 		// With more recent lxc versions use, cgroup will be in lxc/
-		filepath.Join(cgroupRoot, cgroupThis, "lxc", id, "tasks"),
+		filepath.Join(cgroupRoot, cgroupDocker, "lxc", id, pidFile),
 		// With more recent docker, cgroup will be in docker/
-		filepath.Join(cgroupRoot, cgroupThis, "docker", id, "tasks"),
+		filepath.Join(cgroupRoot, cgroupDocker, "docker", id, pidFile),
 		// Even more recent docker versions under systemd use docker-<id>.scope/
-		filepath.Join(cgroupRoot, "system.slice", "docker-"+id+".scope", "tasks"),
+		filepath.Join(cgroupRoot, "system.slice", "docker-"+id+".scope", pidFile),
 		// Even more recent docker versions under cgroup/systemd/docker/<id>/
-		filepath.Join(cgroupRoot, "..", "systemd", "docker", id, "tasks"),
+		filepath.Join(cgroupRoot, "..", "systemd", "docker", id, pidFile),
 		// Kubernetes with docker and CNI is even more different. Works for BestEffort and Burstable QoS
-		filepath.Join(cgroupRoot, "..", "systemd", "kubepods", "*", "pod*", id, "tasks"),
+		filepath.Join(cgroupRoot, "..", "systemd", "kubepods", "*", "pod*", id, pidFile),
 		// Same as above but for Guaranteed QoS
-		filepath.Join(cgroupRoot, "..", "systemd", "kubepods", "pod*", id, "tasks"),
+		filepath.Join(cgroupRoot, "..", "systemd", "kubepods", "pod*", id, pidFile),
 		// Another flavor of containers location in recent kubernetes 1.11+. Works for BestEffort and Burstable QoS
-		filepath.Join(cgroupRoot, cgroupThis, "kubepods.slice", "*.slice", "*", "docker-"+id+".scope", "tasks"),
+		filepath.Join(cgroupRoot, cgroupDocker, "kubepods.slice", "*.slice", "*", "docker-"+id+".scope", pidFile),
 		// Same as above but for Guaranteed QoS
-		filepath.Join(cgroupRoot, cgroupThis, "kubepods.slice", "*", "docker-"+id+".scope", "tasks"),
+		filepath.Join(cgroupRoot, cgroupDocker, "kubepods.slice", "*", "docker-"+id+".scope", pidFile),
 		// When runs inside of a container with recent kubernetes 1.11+. Works for BestEffort and Burstable QoS
-		filepath.Join(cgroupRoot, "kubepods.slice", "*.slice", "*", "docker-"+id+".scope", "tasks"),
+		filepath.Join(cgroupRoot, "kubepods.slice", "*.slice", "*", "docker-"+id+".scope", pidFile),
 		// Same as above but for Guaranteed QoS
-		filepath.Join(cgroupRoot, "kubepods.slice", "*", "docker-"+id+".scope", "tasks"),
+		filepath.Join(cgroupRoot, "kubepods.slice", "*", "docker-"+id+".scope", pidFile),
 	}
 
 	var filename string
@@ -247,7 +264,7 @@ func getPidForContainer(id string) (int, error) {
 		return pid, fmt.Errorf("Unable to find container: %v", id[:len(id)-1])
 	}
 
-	output, err := ioutil.ReadFile(filename)
+	output, err := os.ReadFile(filename)
 	if err != nil {
 		return pid, err
 	}

vendor/github.com/vishvananda/netns/netns_others.go

@@ -1,3 +1,4 @@
+//go:build !linux
 // +build !linux
 
 package netns
@@ -10,6 +11,14 @@ var (
 	ErrNotImplemented = errors.New("not implemented")
 )
 
+// Setns sets namespace using golang.org/x/sys/unix.Setns on Linux. It
+// is not implemented on other platforms.
+//
+// Deprecated: Use golang.org/x/sys/unix.Setns instead.
+func Setns(ns NsHandle, nstype int) (err error) {
+	return ErrNotImplemented
+}
+
 func Set(ns NsHandle) (err error) {
 	return ErrNotImplemented
 }
@@ -18,6 +27,14 @@ func New() (ns NsHandle, err error) {
 	return -1, ErrNotImplemented
 }
 
+func NewNamed(name string) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func DeleteNamed(name string) error {
+	return ErrNotImplemented
+}
+
 func Get() (NsHandle, error) {
 	return -1, ErrNotImplemented
 }

vendor/github.com/vishvananda/netns/nshandle_linux.go

@@ -1,11 +1,3 @@
-// Package netns allows ultra-simple network namespace handling. NsHandles
-// can be retrieved and set. Note that the current namespace is thread
-// local so actions that set and reset namespaces should use LockOSThread
-// to make sure the namespace doesn't change due to a goroutine switch.
-// It is best to close NsHandles when you are done with them. This can be
-// accomplished via a `defer ns.Close()` on the handle. Changing namespaces
-// requires elevated privileges, so in most cases this code needs to be run
-// as root.
 package netns
 
 import (
@@ -38,7 +30,7 @@ func (ns NsHandle) Equal(other NsHandle) bool {
 // String shows the file descriptor number and its dev and inode.
 func (ns NsHandle) String() string {
 	if ns == -1 {
-		return "NS(None)"
+		return "NS(none)"
 	}
 	var s unix.Stat_t
 	if err := unix.Fstat(int(ns), &s); err != nil {
@@ -71,7 +63,7 @@ func (ns *NsHandle) Close() error {
 	if err := unix.Close(int(*ns)); err != nil {
 		return err
 	}
-	(*ns) = -1
+	*ns = -1
 	return nil
 }
 

vendor/github.com/vishvananda/netns/nshandle_others.go

@@ -0,0 +1,45 @@
+//go:build !linux
+// +build !linux
+
+package netns
+
+// NsHandle is a handle to a network namespace. It can only be used on Linux,
+// but provides stub methods on other platforms.
+type NsHandle int
+
+// Equal determines if two network handles refer to the same network
+// namespace. It is only implemented on Linux.
+func (ns NsHandle) Equal(_ NsHandle) bool {
+	return false
+}
+
+// String shows the file descriptor number and its dev and inode.
+// It is only implemented on Linux, and returns "NS(none)" on other
+// platforms.
+func (ns NsHandle) String() string {
+	return "NS(none)"
+}
+
+// UniqueId returns a string which uniquely identifies the namespace
+// associated with the network handle. It is only implemented on Linux,
+// and returns "NS(none)" on other platforms.
+func (ns NsHandle) UniqueId() string {
+	return "NS(none)"
+}
+
+// IsOpen returns true if Close() has not been called. It is only implemented
+// on Linux and always returns false on other platforms.
+func (ns NsHandle) IsOpen() bool {
+	return false
+}
+
+// Close closes the NsHandle and resets its file descriptor to -1.
+// It is only implemented on Linux.
+func (ns *NsHandle) Close() error {
+	return nil
+}
+
+// None gets an empty (closed) NsHandle.
+func None() NsHandle {
+	return NsHandle(-1)
+}