Initial checkin from CRI-O repo

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

5 files changed, 590 insertions, 0 deletions

diff --git a/vendor/github.com/vishvananda/netns/LICENSE b/vendor/github.com/vishvananda/netns/LICENSE
new file mode 100644
index 000000000..9f64db858
--- /dev/null
+++ b/vendor/github.com/vishvananda/netns/LICENSE
@@ -0,0 +1,192 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
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+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2014 Vishvananda Ishaya.
+   Copyright 2014 Docker, Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/vishvananda/netns/README.md b/vendor/github.com/vishvananda/netns/README.md
new file mode 100644
index 000000000..66a5f7258
--- /dev/null
+++ b/vendor/github.com/vishvananda/netns/README.md
@@ -0,0 +1,51 @@
+# netns - network namespaces in go #
+
+The netns package provides an ultra-simple interface for handling
+network namespaces in go. Changing namespaces requires elevated
+privileges, so in most cases this code needs to be run as root.
+
+## Local Build and Test ##
+
+You can use go get command:
+
+    go get github.com/vishvananda/netns
+
+Testing (requires root):
+
+    sudo -E go test github.com/vishvananda/netns
+
+## Example ##
+
+```go
+package main
+
+import (
+    "fmt"
+    "net"
+    "runtime"
+    "github.com/vishvananda/netns"
+)
+
+func main() {
+    // Lock the OS Thread so we don't accidentally switch namespaces
+    runtime.LockOSThread()
+    defer runtime.UnlockOSThread()
+
+    // Save the current network namespace
+    origns, _ := netns.Get()
+    defer origns.Close()
+
+    // Create a new network namespace
+    newns, _ := netns.New()
+    netns.Set(newns)
+    defer newns.Close()
+
+    // Do something with the network namespace
+    ifaces, _ := net.Interfaces()
+    fmt.Printf("Interfaces: %v\n", ifaces)
+
+    // Switch back to the original namespace
+    netns.Set(origns)
+}
+
+```
diff --git a/vendor/github.com/vishvananda/netns/netns.go b/vendor/github.com/vishvananda/netns/netns.go
new file mode 100644
index 000000000..dd2f21570
--- /dev/null
+++ b/vendor/github.com/vishvananda/netns/netns.go
@@ -0,0 +1,80 @@
+// 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 (
+	"fmt"
+	"syscall"
+)
+
+// NsHandle is a handle to a network namespace. It can be cast directly
+// to an int and used as a file descriptor.
+type NsHandle int
+
+// Equal determines if two network handles refer to the same network
+// namespace. This is done by comparing the device and inode that the
+// file descriptors point to.
+func (ns NsHandle) Equal(other NsHandle) bool {
+	if ns == other {
+		return true
+	}
+	var s1, s2 syscall.Stat_t
+	if err := syscall.Fstat(int(ns), &s1); err != nil {
+		return false
+	}
+	if err := syscall.Fstat(int(other), &s2); err != nil {
+		return false
+	}
+	return (s1.Dev == s2.Dev) && (s1.Ino == s2.Ino)
+}
+
+// String shows the file descriptor number and its dev and inode.
+func (ns NsHandle) String() string {
+	var s syscall.Stat_t
+	if ns == -1 {
+		return "NS(None)"
+	}
+	if err := syscall.Fstat(int(ns), &s); err != nil {
+		return fmt.Sprintf("NS(%d: unknown)", ns)
+	}
+	return fmt.Sprintf("NS(%d: %d, %d)", ns, s.Dev, s.Ino)
+}
+
+// UniqueId returns a string which uniquely identifies the namespace
+// associated with the network handle.
+func (ns NsHandle) UniqueId() string {
+	var s syscall.Stat_t
+	if ns == -1 {
+		return "NS(none)"
+	}
+	if err := syscall.Fstat(int(ns), &s); err != nil {
+		return "NS(unknown)"
+	}
+	return fmt.Sprintf("NS(%d:%d)", s.Dev, s.Ino)
+}
+
+// IsOpen returns true if Close() has not been called.
+func (ns NsHandle) IsOpen() bool {
+	return ns != -1
+}
+
+// Close closes the NsHandle and resets its file descriptor to -1.
+// It is not safe to use an NsHandle after Close() is called.
+func (ns *NsHandle) Close() error {
+	if err := syscall.Close(int(*ns)); err != nil {
+		return err
+	}
+	(*ns) = -1
+	return nil
+}
+
+// None gets an empty (closed) NsHandle.
+func None() NsHandle {
+	return NsHandle(-1)
+}
diff --git a/vendor/github.com/vishvananda/netns/netns_linux.go b/vendor/github.com/vishvananda/netns/netns_linux.go
new file mode 100644
index 000000000..a267c7105
--- /dev/null
+++ b/vendor/github.com/vishvananda/netns/netns_linux.go
@@ -0,0 +1,224 @@
+// +build linux
+
+package netns
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"syscall"
+)
+
+// SYS_SETNS syscall allows changing the namespace of the current process.
+var SYS_SETNS = map[string]uintptr{
+	"386":     346,
+	"amd64":   308,
+	"arm64":   268,
+	"arm":     375,
+	"mips":    4344,
+	"mipsle":  4344,
+	"ppc64":   350,
+	"ppc64le": 350,
+	"s390x":   339,
+}[runtime.GOARCH]
+
+// Deprecated: use syscall pkg instead (go >= 1.5 needed).
+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 */
+)
+
+// Setns sets namespace using syscall. Note that this should be a method
+// in syscall but it has not been added.
+func Setns(ns NsHandle, nstype int) (err error) {
+	_, _, e1 := syscall.Syscall(SYS_SETNS, uintptr(ns), uintptr(nstype), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// Set sets the current network namespace to the namespace represented
+// by NsHandle.
+func Set(ns NsHandle) (err error) {
+	return Setns(ns, CLONE_NEWNET)
+}
+
+// New creates a new network namespace and returns a handle to it.
+func New() (ns NsHandle, err error) {
+	if err := syscall.Unshare(CLONE_NEWNET); err != nil {
+		return -1, err
+	}
+	return Get()
+}
+
+// Get gets a handle to the current threads network namespace.
+func Get() (NsHandle, error) {
+	return GetFromThread(os.Getpid(), syscall.Gettid())
+}
+
+// GetFromPath gets a handle to a network namespace
+// identified by the path
+func GetFromPath(path string) (NsHandle, error) {
+	fd, err := syscall.Open(path, syscall.O_RDONLY, 0)
+	if err != nil {
+		return -1, err
+	}
+	return NsHandle(fd), nil
+}
+
+// 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))
+}
+
+// GetFromPid gets a handle to the network namespace of a given pid.
+func GetFromPid(pid int) (NsHandle, error) {
+	return GetFromPath(fmt.Sprintf("/proc/%d/ns/net", pid))
+}
+
+// GetFromThread gets a handle to the network namespace of a given pid and tid.
+func GetFromThread(pid, tid int) (NsHandle, error) {
+	return GetFromPath(fmt.Sprintf("/proc/%d/task/%d/ns/net", pid, tid))
+}
+
+// GetFromDocker gets a handle to the network namespace of a docker container.
+// Id is prefixed matched against the running docker containers, so a short
+// identifier can be used as long as it isn't ambiguous.
+func GetFromDocker(id string) (NsHandle, error) {
+	pid, err := getPidForContainer(id)
+	if err != nil {
+		return -1, err
+	}
+	return GetFromPid(pid)
+}
+
+// borrowed from docker/utils/utils.go
+func findCgroupMountpoint(cgroupType string) (string, error) {
+	output, err := ioutil.ReadFile("/proc/mounts")
+	if err != nil {
+		return "", 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
+				}
+			}
+		}
+	}
+
+	return "", 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")
+	if err != nil {
+		return "", err
+	}
+	result := strings.Split(string(dockerpid), "\n")
+	if len(result) == 0 || len(result[0]) == 0 {
+		return "", fmt.Errorf("docker pid not found in /var/run/docker.pid")
+	}
+	pid, err := strconv.Atoi(result[0])
+	if err != nil {
+		return "", err
+	}
+	output, err := ioutil.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 {
+			return parts[2], nil
+		}
+	}
+	return "", fmt.Errorf("cgroup '%s' not found in /proc/%d/cgroup", cgroupType, pid)
+}
+
+// Returns the first pid in a container.
+// borrowed from docker/utils/utils.go
+// modified to only return the first pid
+// modified to glob with id
+// modified to search for newer docker containers
+func getPidForContainer(id string) (int, error) {
+	pid := 0
+
+	// memory is chosen randomly, any cgroup used by docker works
+	cgroupType := "memory"
+
+	cgroupRoot, err := findCgroupMountpoint(cgroupType)
+	if err != nil {
+		return pid, err
+	}
+
+	cgroupThis, err := getThisCgroup(cgroupType)
+	if err != nil {
+		return pid, err
+	}
+
+	id += "*"
+
+	attempts := []string{
+		filepath.Join(cgroupRoot, cgroupThis, id, "tasks"),
+		// With more recent lxc versions use, cgroup will be in lxc/
+		filepath.Join(cgroupRoot, cgroupThis, "lxc", id, "tasks"),
+		// With more recent docker, cgroup will be in docker/
+		filepath.Join(cgroupRoot, cgroupThis, "docker", id, "tasks"),
+		// Even more recent docker versions under systemd use docker-<id>.scope/
+		filepath.Join(cgroupRoot, "system.slice", "docker-"+id+".scope", "tasks"),
+		// Even more recent docker versions under cgroup/systemd/docker/<id>/
+		filepath.Join(cgroupRoot, "..", "systemd", "docker", id, "tasks"),
+	}
+
+	var filename string
+	for _, attempt := range attempts {
+		filenames, _ := filepath.Glob(attempt)
+		if len(filenames) > 1 {
+			return pid, fmt.Errorf("Ambiguous id supplied: %v", filenames)
+		} else if len(filenames) == 1 {
+			filename = filenames[0]
+			break
+		}
+	}
+
+	if filename == "" {
+		return pid, fmt.Errorf("Unable to find container: %v", id[:len(id)-1])
+	}
+
+	output, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return pid, err
+	}
+
+	result := strings.Split(string(output), "\n")
+	if len(result) == 0 || len(result[0]) == 0 {
+		return pid, fmt.Errorf("No pid found for container")
+	}
+
+	pid, err = strconv.Atoi(result[0])
+	if err != nil {
+		return pid, fmt.Errorf("Invalid pid '%s': %s", result[0], err)
+	}
+
+	return pid, nil
+}
diff --git a/vendor/github.com/vishvananda/netns/netns_unspecified.go b/vendor/github.com/vishvananda/netns/netns_unspecified.go
new file mode 100644
index 000000000..d06af62b6
--- /dev/null
+++ b/vendor/github.com/vishvananda/netns/netns_unspecified.go
@@ -0,0 +1,43 @@
+// +build !linux
+
+package netns
+
+import (
+	"errors"
+)
+
+var (
+	ErrNotImplemented = errors.New("not implemented")
+)
+
+func Set(ns NsHandle) (err error) {
+	return ErrNotImplemented
+}
+
+func New() (ns NsHandle, err error) {
+	return -1, ErrNotImplemented
+}
+
+func Get() (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func GetFromPath(path string) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func GetFromName(name string) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func GetFromPid(pid int) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func GetFromThread(pid, tid int) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}
+
+func GetFromDocker(id string) (NsHandle, error) {
+	return -1, ErrNotImplemented
+}