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feat: support hardware watchdog timers
Only enabled when activated by config, disabled on shutdown/reboot Fixes siderolabs#8284 Signed-off-by: Dmitry Sharshakov <[email protected]> Signed-off-by: Dmitry Sharshakov <[email protected]> Signed-off-by: Andrey Smirnov <[email protected]>
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174 changes: 174 additions & 0 deletions
174
internal/app/machined/pkg/controllers/runtime/watchdog_timer.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package runtime | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
| "syscall" | ||
| "time" | ||
| "unsafe" | ||
|
|
||
| "github.com/cosi-project/runtime/pkg/controller" | ||
| "github.com/cosi-project/runtime/pkg/safe" | ||
| "github.com/cosi-project/runtime/pkg/state" | ||
| "github.com/siderolabs/gen/optional" | ||
| "go.uber.org/zap" | ||
| "golang.org/x/sys/unix" | ||
|
|
||
| "github.com/siderolabs/talos/pkg/machinery/resources/runtime" | ||
| ) | ||
|
|
||
| // WatchdogTimerController watches v1alpha1.Config, creates/updates/deletes kernel module specs. | ||
| type WatchdogTimerController struct{} | ||
|
|
||
| // Name implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerController) Name() string { | ||
| return "runtime.WatchdogTimerController" | ||
| } | ||
|
|
||
| // Inputs implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerController) Inputs() []controller.Input { | ||
| return []controller.Input{ | ||
| { | ||
| Namespace: runtime.NamespaceName, | ||
| Type: runtime.WatchdogTimerConfigType, | ||
| ID: optional.Some(runtime.WatchdogTimerConfigID), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Outputs implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerController) Outputs() []controller.Output { | ||
| return []controller.Output{ | ||
| { | ||
| Type: runtime.WatchdogTimerStatusType, | ||
| Kind: controller.OutputExclusive, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Run implements controller.Controller interface. | ||
| // | ||
| //nolint:gocyclo,cyclop | ||
| func (ctrl *WatchdogTimerController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error { | ||
| var ( | ||
| ticker *time.Ticker | ||
| tickerC <-chan time.Time | ||
| ) | ||
|
|
||
| tickerStop := func() { | ||
| if ticker == nil { | ||
| return | ||
| } | ||
|
|
||
| ticker.Stop() | ||
|
|
||
| ticker = nil | ||
| tickerC = nil | ||
| } | ||
|
|
||
| defer tickerStop() | ||
|
|
||
| var wd *os.File | ||
|
|
||
| wdClose := func() { | ||
| if wd == nil { | ||
| return | ||
| } | ||
|
|
||
| logger.Info("closing hardware watchdog", zap.String("path", wd.Name())) | ||
|
|
||
| // Magic close: make sure old watchdog won't trip after we close it | ||
| if _, err := wd.WriteString("V"); err != nil { | ||
| logger.Error("failed to send magic close to watchdog", zap.String("path", wd.Name())) | ||
| } | ||
|
|
||
| if err := wd.Close(); err != nil { | ||
| logger.Error("failed to close watchdog", zap.String("path", wd.Name())) | ||
| } | ||
|
|
||
| wd = nil | ||
| } | ||
|
|
||
| defer wdClose() | ||
|
|
||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil | ||
| case <-tickerC: | ||
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, wd.Fd(), unix.WDIOC_KEEPALIVE, 0); err != 0 { | ||
| return fmt.Errorf("failed to feed watchdog: %w", err) | ||
| } | ||
|
|
||
| continue | ||
| case <-r.EventCh(): | ||
| } | ||
|
|
||
| cfg, err := safe.ReaderGetByID[*runtime.WatchdogTimerConfig](ctx, r, runtime.WatchdogTimerConfigID) | ||
| if err != nil { | ||
| if !state.IsNotFoundError(err) { | ||
| return fmt.Errorf("error getting watchdog config: %w", err) | ||
| } | ||
| } | ||
|
|
||
| r.StartTrackingOutputs() | ||
|
|
||
| if cfg == nil { | ||
| tickerStop() | ||
| wdClose() | ||
| } else { | ||
| // close the watchdog if requested to use new one | ||
| if wd != nil && wd.Name() != cfg.TypedSpec().Device { | ||
| wdClose() | ||
| } | ||
|
|
||
| if wd == nil { | ||
| wd, err = os.OpenFile(cfg.TypedSpec().Device, syscall.O_RDWR, 0o600) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to open watchdog device: %s", err) | ||
| } | ||
|
|
||
| logger.Info("opened hardware watchdog", zap.String("path", cfg.TypedSpec().Device)) | ||
| } | ||
|
|
||
| timeout := int(cfg.TypedSpec().Timeout.Seconds()) | ||
|
|
||
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, wd.Fd(), uintptr(unix.WDIOC_SETTIMEOUT), uintptr(unsafe.Pointer(&timeout))); err != 0 { | ||
| return fmt.Errorf("failed to set watchdog timeout: %w", err) | ||
| } | ||
|
|
||
| tickerStop() | ||
|
|
||
| // 3 pings per timeout should suffice in any case | ||
| feedInterval := cfg.TypedSpec().Timeout / 3 | ||
|
|
||
| ticker = time.NewTicker(feedInterval) | ||
| //tickerC = ticker.C | ||
|
|
||
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, wd.Fd(), uintptr(unix.WDIOC_KEEPALIVE), 0); err != 0 { | ||
| return fmt.Errorf("failed to feed watchdog: %w", err) | ||
| } | ||
|
|
||
| logger.Info("set hardware watchdog timeout", zap.Duration("timeout", cfg.TypedSpec().Timeout), zap.Duration("feed_interval", feedInterval)) | ||
|
|
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| if err = safe.WriterModify(ctx, r, runtime.NewWatchdogTimerStatus(cfg.Metadata().ID()), func(status *runtime.WatchdogTimerStatus) error { | ||
| status.TypedSpec().Device = cfg.TypedSpec().Device | ||
| status.TypedSpec().Timeout = cfg.TypedSpec().Timeout | ||
| status.TypedSpec().FeedInterval = feedInterval | ||
|
|
||
| return nil | ||
| }); err != nil { | ||
| return fmt.Errorf("error updating watchdog status: %w", err) | ||
| } | ||
| } | ||
|
|
||
| if err = safe.CleanupOutputs[*runtime.WatchdogTimerStatus](ctx, r); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
internal/app/machined/pkg/controllers/runtime/watchdog_timer_config.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package runtime | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "github.com/cosi-project/runtime/pkg/controller" | ||
| "github.com/cosi-project/runtime/pkg/safe" | ||
| "github.com/cosi-project/runtime/pkg/state" | ||
| "github.com/siderolabs/gen/optional" | ||
| "go.uber.org/zap" | ||
|
|
||
| "github.com/siderolabs/talos/pkg/machinery/resources/config" | ||
| "github.com/siderolabs/talos/pkg/machinery/resources/runtime" | ||
| ) | ||
|
|
||
| // WatchdogTimerConfigController generates configuration for watchdog timers. | ||
| type WatchdogTimerConfigController struct{} | ||
|
|
||
| // Name implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerConfigController) Name() string { | ||
| return "runtime.WatchdogTimerConfigController" | ||
| } | ||
|
|
||
| // Inputs implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerConfigController) Inputs() []controller.Input { | ||
| return []controller.Input{ | ||
| { | ||
| Namespace: config.NamespaceName, | ||
| Type: config.MachineConfigType, | ||
| ID: optional.Some(config.V1Alpha1ID), | ||
| Kind: controller.InputWeak, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Outputs implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerConfigController) Outputs() []controller.Output { | ||
| return []controller.Output{ | ||
| { | ||
| Type: runtime.WatchdogTimerConfigType, | ||
| Kind: controller.OutputExclusive, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Run implements controller.Controller interface. | ||
| func (ctrl *WatchdogTimerConfigController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) (err error) { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil | ||
| case <-r.EventCh(): | ||
| } | ||
|
|
||
| cfg, err := safe.ReaderGetByID[*config.MachineConfig](ctx, r, config.V1Alpha1ID) | ||
| if err != nil && !state.IsNotFoundError(err) { | ||
| return fmt.Errorf("error getting machine config: %w", err) | ||
| } | ||
|
|
||
| r.StartTrackingOutputs() | ||
|
|
||
| if cfg != nil { | ||
| if watchdogConfig := cfg.Config().Runtime().WatchdogTimer(); watchdogConfig != nil { | ||
| if err = safe.WriterModify(ctx, r, runtime.NewWatchdogTimerConfig(), func(cfg *runtime.WatchdogTimerConfig) error { | ||
| cfg.TypedSpec().Device = watchdogConfig.Device() | ||
| cfg.TypedSpec().Timeout = watchdogConfig.Timeout() | ||
|
|
||
| return nil | ||
| }); err != nil { | ||
| return fmt.Errorf("error updating kmsg log config: %w", err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if err = safe.CleanupOutputs[*runtime.WatchdogTimerConfig](ctx, r); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } |
60 changes: 60 additions & 0 deletions
60
internal/app/machined/pkg/controllers/runtime/watchdog_timer_config_test.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package runtime_test | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/cosi-project/runtime/pkg/resource" | ||
| "github.com/cosi-project/runtime/pkg/resource/rtestutils" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/suite" | ||
|
|
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| "github.com/siderolabs/talos/internal/app/machined/pkg/controllers/ctest" | ||
| runtimectrls "github.com/siderolabs/talos/internal/app/machined/pkg/controllers/runtime" | ||
| "github.com/siderolabs/talos/pkg/machinery/config/container" | ||
| runtimecfg "github.com/siderolabs/talos/pkg/machinery/config/types/runtime" | ||
| "github.com/siderolabs/talos/pkg/machinery/resources/config" | ||
| "github.com/siderolabs/talos/pkg/machinery/resources/runtime" | ||
| ) | ||
|
|
||
| type WatchdogTimerConfigSuite struct { | ||
| ctest.DefaultSuite | ||
| } | ||
|
|
||
| func TestWatchdogTimerConfigSuite(t *testing.T) { | ||
| suite.Run(t, new(WatchdogTimerConfigSuite)) | ||
| } | ||
|
|
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| func (suite *WatchdogTimerConfigSuite) TestWatchdogTimerConfigNone() { | ||
| suite.Require().NoError(suite.Runtime().RegisterController(&runtimectrls.WatchdogTimerConfigController{})) | ||
|
|
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| rtestutils.AssertNoResource[*runtime.WatchdogTimerConfig](suite.Ctx(), suite.T(), suite.State(), runtime.WatchdogTimerConfigID) | ||
| } | ||
|
|
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| func (suite *WatchdogTimerConfigSuite) TestWatchdogTimerConfigMachineConfig() { | ||
| suite.Require().NoError(suite.Runtime().RegisterController(&runtimectrls.WatchdogTimerConfigController{})) | ||
|
|
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| watchdogTimerConfig := &runtimecfg.WatchdogTimerV1Alpha1{ | ||
| WatchdogDevice: "/dev/watchdog0", | ||
| } | ||
|
|
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| cfg, err := container.New(watchdogTimerConfig) | ||
| suite.Require().NoError(err) | ||
|
|
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| suite.Require().NoError(suite.State().Create(suite.Ctx(), config.NewMachineConfig(cfg))) | ||
|
|
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| rtestutils.AssertResources[*runtime.WatchdogTimerConfig](suite.Ctx(), suite.T(), suite.State(), []resource.ID{runtime.WatchdogTimerConfigID}, | ||
| func(cfg *runtime.WatchdogTimerConfig, asrt *assert.Assertions) { | ||
| asrt.Equal( | ||
| "/dev/watchdog0", | ||
| cfg.TypedSpec().Device, | ||
| ) | ||
| asrt.Equal( | ||
| runtimecfg.DefaultWatchdogTimeout, | ||
| cfg.TypedSpec().Timeout, | ||
| ) | ||
| }) | ||
| } |
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