build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/utils/inotify/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

e2e/vendor/k8s.io/utils/inotify/PATENTS

@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.

e2e/vendor/k8s.io/utils/inotify/README.md

@@ -0,0 +1,5 @@
+This is a fork of golang.org/x/exp/inotify before it was deleted.
+
+Please use gopkg.in/fsnotify.v1 instead.
+
+For updates, see: https://github.com/fsnotify/fsnotify

e2e/vendor/k8s.io/utils/inotify/inotify.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+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.
+*/
+
+package inotify // import "k8s.io/utils/inotify"
+
+import (
+	"sync"
+)
+
+// Event represents a notification
+type Event struct {
+	Mask   uint32 // Mask of events
+	Cookie uint32 // Unique cookie associating related events (for rename(2))
+	Name   string // File name (optional)
+}
+
+type watch struct {
+	wd    uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
+	flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
+}
+
+// Watcher represents an inotify instance
+type Watcher struct {
+	mu       sync.Mutex
+	fd       int               // File descriptor (as returned by the inotify_init() syscall)
+	watches  map[string]*watch // Map of inotify watches (key: path)
+	paths    map[int]string    // Map of watched paths (key: watch descriptor)
+	Error    chan error        // Errors are sent on this channel
+	Event    chan *Event       // Events are returned on this channel
+	done     chan bool         // Channel for sending a "quit message" to the reader goroutine
+	isClosed bool              // Set to true when Close() is first called
+}

e2e/vendor/k8s.io/utils/inotify/inotify_linux.go

@@ -0,0 +1,315 @@
+//go:build linux
+// +build linux
+
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package inotify implements a wrapper for the Linux inotify system.
+
+Example:
+
+	watcher, err := inotify.NewWatcher()
+	if err != nil {
+	    log.Fatal(err)
+	}
+	err = watcher.Watch("/tmp")
+	if err != nil {
+	    log.Fatal(err)
+	}
+	for {
+	    select {
+	    case ev := <-watcher.Event:
+	        log.Println("event:", ev)
+	    case err := <-watcher.Error:
+	        log.Println("error:", err)
+	    }
+	}
+*/
+package inotify // import "k8s.io/utils/inotify"
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+// NewWatcher creates and returns a new inotify instance using inotify_init(2)
+func NewWatcher() (*Watcher, error) {
+	fd, errno := syscall.InotifyInit1(syscall.IN_CLOEXEC)
+	if fd == -1 {
+		return nil, os.NewSyscallError("inotify_init", errno)
+	}
+	w := &Watcher{
+		fd:      fd,
+		watches: make(map[string]*watch),
+		paths:   make(map[int]string),
+		Event:   make(chan *Event),
+		Error:   make(chan error),
+		done:    make(chan bool, 1),
+	}
+
+	go w.readEvents()
+	return w, nil
+}
+
+// Close closes an inotify watcher instance
+// It sends a message to the reader goroutine to quit and removes all watches
+// associated with the inotify instance
+func (w *Watcher) Close() error {
+	if w.isClosed {
+		return nil
+	}
+	w.isClosed = true
+
+	// Send "quit" message to the reader goroutine
+	w.done <- true
+	for path := range w.watches {
+		w.RemoveWatch(path)
+	}
+
+	return nil
+}
+
+// AddWatch adds path to the watched file set.
+// The flags are interpreted as described in inotify_add_watch(2).
+func (w *Watcher) AddWatch(path string, flags uint32) error {
+	if w.isClosed {
+		return errors.New("inotify instance already closed")
+	}
+
+	watchEntry, found := w.watches[path]
+	if found {
+		watchEntry.flags |= flags
+		flags |= syscall.IN_MASK_ADD
+	}
+
+	w.mu.Lock() // synchronize with readEvents goroutine
+
+	wd, err := syscall.InotifyAddWatch(w.fd, path, flags)
+	if err != nil {
+		w.mu.Unlock()
+		return &os.PathError{
+			Op:   "inotify_add_watch",
+			Path: path,
+			Err:  err,
+		}
+	}
+
+	if !found {
+		w.watches[path] = &watch{wd: uint32(wd), flags: flags}
+		w.paths[wd] = path
+	}
+	w.mu.Unlock()
+	return nil
+}
+
+// Watch adds path to the watched file set, watching all events.
+func (w *Watcher) Watch(path string) error {
+	return w.AddWatch(path, InAllEvents)
+}
+
+// RemoveWatch removes path from the watched file set.
+func (w *Watcher) RemoveWatch(path string) error {
+	watch, ok := w.watches[path]
+	if !ok {
+		return fmt.Errorf("can't remove non-existent inotify watch for: %s", path)
+	}
+	success, errno := syscall.InotifyRmWatch(w.fd, watch.wd)
+	if success == -1 {
+		// when file descriptor or watch descriptor not found, InotifyRmWatch syscall return EINVAL error
+		// if return error, it may lead this path remain in watches and paths map, and no other event can trigger remove action.
+		if errno != syscall.EINVAL {
+			return os.NewSyscallError("inotify_rm_watch", errno)
+		}
+	}
+	delete(w.watches, path)
+	// Locking here to protect the read from paths in readEvents.
+	w.mu.Lock()
+	delete(w.paths, int(watch.wd))
+	w.mu.Unlock()
+	return nil
+}
+
+// readEvents reads from the inotify file descriptor, converts the
+// received events into Event objects and sends them via the Event channel
+func (w *Watcher) readEvents() {
+	var buf [syscall.SizeofInotifyEvent * 4096]byte
+
+	for {
+		n, err := syscall.Read(w.fd, buf[:])
+		// See if there is a message on the "done" channel
+		var done bool
+		select {
+		case done = <-w.done:
+		default:
+		}
+
+		// If EOF or a "done" message is received
+		if n == 0 || done {
+			// The syscall.Close can be slow.  Close
+			// w.Event first.
+			close(w.Event)
+			err := syscall.Close(w.fd)
+			if err != nil {
+				w.Error <- os.NewSyscallError("close", err)
+			}
+			close(w.Error)
+			return
+		}
+		if n < 0 {
+			w.Error <- os.NewSyscallError("read", err)
+			continue
+		}
+		if n < syscall.SizeofInotifyEvent {
+			w.Error <- errors.New("inotify: short read in readEvents()")
+			continue
+		}
+
+		var offset uint32
+		// We don't know how many events we just read into the buffer
+		// While the offset points to at least one whole event...
+		for offset <= uint32(n-syscall.SizeofInotifyEvent) {
+			// Point "raw" to the event in the buffer
+			raw := (*syscall.InotifyEvent)(unsafe.Pointer(&buf[offset]))
+			event := new(Event)
+			event.Mask = uint32(raw.Mask)
+			event.Cookie = uint32(raw.Cookie)
+			nameLen := uint32(raw.Len)
+			// If the event happened to the watched directory or the watched file, the kernel
+			// doesn't append the filename to the event, but we would like to always fill the
+			// the "Name" field with a valid filename. We retrieve the path of the watch from
+			// the "paths" map.
+			w.mu.Lock()
+			name, ok := w.paths[int(raw.Wd)]
+			w.mu.Unlock()
+			if ok {
+				event.Name = name
+				if nameLen > 0 {
+					// Point "bytes" at the first byte of the filename
+					bytes := (*[syscall.PathMax]byte)(unsafe.Pointer(&buf[offset+syscall.SizeofInotifyEvent]))
+					// The filename is padded with NUL bytes. TrimRight() gets rid of those.
+					event.Name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000")
+				}
+				// Send the event on the events channel
+				w.Event <- event
+			}
+			// Move to the next event in the buffer
+			offset += syscall.SizeofInotifyEvent + nameLen
+		}
+	}
+}
+
+// String formats the event e in the form
+// "filename: 0xEventMask = IN_ACCESS|IN_ATTRIB_|..."
+func (e *Event) String() string {
+	var events string
+
+	m := e.Mask
+	for _, b := range eventBits {
+		if m&b.Value == b.Value {
+			m &^= b.Value
+			events += "|" + b.Name
+		}
+	}
+
+	if m != 0 {
+		events += fmt.Sprintf("|%#x", m)
+	}
+	if len(events) > 0 {
+		events = " == " + events[1:]
+	}
+
+	return fmt.Sprintf("%q: %#x%s", e.Name, e.Mask, events)
+}
+
+const (
+	// Options for inotify_init() are not exported
+	// IN_CLOEXEC    uint32 = syscall.IN_CLOEXEC
+	// IN_NONBLOCK   uint32 = syscall.IN_NONBLOCK
+
+	// Options for AddWatch
+
+	// InDontFollow : Don't dereference pathname if it is a symbolic link
+	InDontFollow uint32 = syscall.IN_DONT_FOLLOW
+	// InOneshot : Monitor the filesystem object corresponding to pathname for one event, then remove from watch list
+	InOneshot uint32 = syscall.IN_ONESHOT
+	// InOnlydir : Watch pathname only if it is a directory
+	InOnlydir uint32 = syscall.IN_ONLYDIR
+
+	// The "IN_MASK_ADD" option is not exported, as AddWatch
+	// adds it automatically, if there is already a watch for the given path
+	// IN_MASK_ADD      uint32 = syscall.IN_MASK_ADD
+
+	// Events
+
+	// InAccess : File was accessed
+	InAccess uint32 = syscall.IN_ACCESS
+	// InAllEvents : Bit mask for all notify events
+	InAllEvents uint32 = syscall.IN_ALL_EVENTS
+	// InAttrib : Metadata changed
+	InAttrib uint32 = syscall.IN_ATTRIB
+	// InClose : Equates to IN_CLOSE_WRITE | IN_CLOSE_NOWRITE
+	InClose uint32 = syscall.IN_CLOSE
+	// InCloseNowrite : File or directory not opened for writing was closed
+	InCloseNowrite uint32 = syscall.IN_CLOSE_NOWRITE
+	// InCloseWrite : File opened for writing was closed
+	InCloseWrite uint32 = syscall.IN_CLOSE_WRITE
+	// InCreate : File/directory created in watched directory
+	InCreate uint32 = syscall.IN_CREATE
+	// InDelete : File/directory deleted from watched directory
+	InDelete uint32 = syscall.IN_DELETE
+	// InDeleteSelf : Watched file/directory was itself deleted
+	InDeleteSelf uint32 = syscall.IN_DELETE_SELF
+	// InModify : File was modified
+	InModify uint32 = syscall.IN_MODIFY
+	// InMove : Equates to IN_MOVED_FROM | IN_MOVED_TO
+	InMove uint32 = syscall.IN_MOVE
+	// InMovedFrom : Generated for the directory containing the old filename when a file is renamed
+	InMovedFrom uint32 = syscall.IN_MOVED_FROM
+	// InMovedTo : Generated for the directory containing the new filename when a file is renamed
+	InMovedTo uint32 = syscall.IN_MOVED_TO
+	// InMoveSelf : Watched file/directory was itself moved
+	InMoveSelf uint32 = syscall.IN_MOVE_SELF
+	// InOpen : File or directory was opened
+	InOpen uint32 = syscall.IN_OPEN
+
+	// Special events
+
+	// InIsdir : Subject of this event is a directory
+	InIsdir uint32 = syscall.IN_ISDIR
+	// InIgnored : Watch was removed explicitly or automatically
+	InIgnored uint32 = syscall.IN_IGNORED
+	// InQOverflow : Event queue overflowed
+	InQOverflow uint32 = syscall.IN_Q_OVERFLOW
+	// InUnmount : Filesystem containing watched object was unmounted
+	InUnmount uint32 = syscall.IN_UNMOUNT
+)
+
+var eventBits = []struct {
+	Value uint32
+	Name  string
+}{
+	{InAccess, "IN_ACCESS"},
+	{InAttrib, "IN_ATTRIB"},
+	{InClose, "IN_CLOSE"},
+	{InCloseNowrite, "IN_CLOSE_NOWRITE"},
+	{InCloseWrite, "IN_CLOSE_WRITE"},
+	{InCreate, "IN_CREATE"},
+	{InDelete, "IN_DELETE"},
+	{InDeleteSelf, "IN_DELETE_SELF"},
+	{InModify, "IN_MODIFY"},
+	{InMove, "IN_MOVE"},
+	{InMovedFrom, "IN_MOVED_FROM"},
+	{InMovedTo, "IN_MOVED_TO"},
+	{InMoveSelf, "IN_MOVE_SELF"},
+	{InOpen, "IN_OPEN"},
+	{InIsdir, "IN_ISDIR"},
+	{InIgnored, "IN_IGNORED"},
+	{InQOverflow, "IN_Q_OVERFLOW"},
+	{InUnmount, "IN_UNMOUNT"},
+}

e2e/vendor/k8s.io/utils/inotify/inotify_others.go

@@ -0,0 +1,54 @@
+// +build !linux
+
+/*
+Copyright 2020 The Kubernetes Authors.
+
+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.
+*/
+
+package inotify // import "k8s.io/utils/inotify"
+
+import (
+	"fmt"
+	"runtime"
+)
+
+var errNotSupported = fmt.Errorf("watch not supported on %s", runtime.GOOS)
+
+// NewWatcher creates and returns a new inotify instance using inotify_init(2)
+func NewWatcher() (*Watcher, error) {
+	return nil, errNotSupported
+}
+
+// Close closes an inotify watcher instance
+// It sends a message to the reader goroutine to quit and removes all watches
+// associated with the inotify instance
+func (w *Watcher) Close() error {
+	return errNotSupported
+}
+
+// AddWatch adds path to the watched file set.
+// The flags are interpreted as described in inotify_add_watch(2).
+func (w *Watcher) AddWatch(path string, flags uint32) error {
+	return errNotSupported
+}
+
+// Watch adds path to the watched file set, watching all events.
+func (w *Watcher) Watch(path string) error {
+	return errNotSupported
+}
+
+// RemoveWatch removes path from the watched file set.
+func (w *Watcher) RemoveWatch(path string) error {
+	return errNotSupported
+}