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/*
Copyright The containerd 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 api
import (
"fmt"
"strings"
)
const (
// ValidEvents is the event mask of all valid events.
ValidEvents = EventMask((1 << (Event_LAST - 1)) - 1)
)
// nolint
type (
// Define *Request/*Response type aliases for *Event/Empty pairs.
StateChangeResponse = Empty
RunPodSandboxRequest = StateChangeEvent
RunPodSandboxResponse = Empty
StopPodSandboxRequest = StateChangeEvent
StopPodSandboxResponse = Empty
RemovePodSandboxRequest = StateChangeEvent
RemovePodSandboxResponse = Empty
StartContainerRequest = StateChangeEvent
StartContainerResponse = Empty
RemoveContainerRequest = StateChangeEvent
RemoveContainerResponse = Empty
PostCreateContainerRequest = StateChangeEvent
PostCreateContainerResponse = Empty
PostStartContainerRequest = StateChangeEvent
PostStartContainerResponse = Empty
PostUpdateContainerRequest = StateChangeEvent
PostUpdateContainerResponse = Empty
ShutdownRequest = Empty
ShutdownResponse = Empty
)
// EventMask corresponds to a set of enumerated Events.
type EventMask int32
// ParseEventMask parses a string representation into an EventMask.
func ParseEventMask(events ...string) (EventMask, error) {
var mask EventMask
bits := map[string]Event{
"runpodsandbox": Event_RUN_POD_SANDBOX,
"stoppodsandbox": Event_STOP_POD_SANDBOX,
"removepodsandbox": Event_REMOVE_POD_SANDBOX,
"createcontainer": Event_CREATE_CONTAINER,
"postcreatecontainer": Event_POST_CREATE_CONTAINER,
"startcontainer": Event_START_CONTAINER,
"poststartcontainer": Event_POST_START_CONTAINER,
"updatecontainer": Event_UPDATE_CONTAINER,
"postupdatecontainer": Event_POST_UPDATE_CONTAINER,
"stopcontainer": Event_STOP_CONTAINER,
"removecontainer": Event_REMOVE_CONTAINER,
}
for _, event := range events {
lcEvents := strings.ToLower(event)
for _, name := range strings.Split(lcEvents, ",") {
switch name {
case "all":
mask |= ValidEvents
continue
case "pod", "podsandbox":
for name, bit := range bits {
if strings.Contains(name, "pod") {
mask.Set(bit)
}
}
continue
case "container":
for name, bit := range bits {
if strings.Contains(name, "container") {
mask.Set(bit)
}
}
continue
}
bit, ok := bits[strings.TrimSpace(name)]
if !ok {
return 0, fmt.Errorf("unknown event %q", name)
}
mask.Set(bit)
}
}
return mask, nil
}
// MustParseEventMask parses the given events, panic()ing on errors.
func MustParseEventMask(events ...string) EventMask {
mask, err := ParseEventMask(events...)
if err != nil {
panic(fmt.Sprintf("failed to parse events %s", strings.Join(events, " ")))
}
return mask
}
// PrettyString returns a human-readable string representation of an EventMask.
func (m *EventMask) PrettyString() string {
names := map[Event]string{
Event_RUN_POD_SANDBOX: "RunPodSandbox",
Event_STOP_POD_SANDBOX: "StopPodSandbox",
Event_REMOVE_POD_SANDBOX: "RemovePodSandbox",
Event_CREATE_CONTAINER: "CreateContainer",
Event_POST_CREATE_CONTAINER: "PostCreateContainer",
Event_START_CONTAINER: "StartContainer",
Event_POST_START_CONTAINER: "PostStartContainer",
Event_UPDATE_CONTAINER: "UpdateContainer",
Event_POST_UPDATE_CONTAINER: "PostUpdateContainer",
Event_STOP_CONTAINER: "StopContainer",
Event_REMOVE_CONTAINER: "RemoveContainer",
}
mask := *m
events, sep := "", ""
for bit := Event_UNKNOWN + 1; bit <= Event_LAST; bit++ {
if mask.IsSet(bit) {
events += sep + names[bit]
sep = ","
mask.Clear(bit)
}
}
if mask != 0 {
events += sep + fmt.Sprintf("unknown(0x%x)", mask)
}
return events
}
// Set sets the given Events in the mask.
func (m *EventMask) Set(events ...Event) *EventMask {
for _, e := range events {
*m |= (1 << (e - 1))
}
return m
}
// Clear clears the given Events in the mask.
func (m *EventMask) Clear(events ...Event) *EventMask {
for _, e := range events {
*m &^= (1 << (e - 1))
}
return m
}
// IsSet check if the given Event is set in the mask.
func (m *EventMask) IsSet(e Event) bool {
return *m&(1<<(e-1)) != 0
}
|
