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Include meta devices in generated CDI spec

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This change includes meta devices (e.g. /dev/nvidiactl) in the
generated CDI spec. Missing device nodes are ignored.

Signed-off-by: Evan Lezar <elezar@nvidia.com>
This commit is contained in:
Evan Lezar 2022-10-07 16:23:18 +02:00
parent dfa041991f
commit 3dd8020695
1 changed files with 37 additions and 8 deletions
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45
cmd/nvidia-ctk/info/generate-cdi/generate-cdi.go
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@ -176,6 +176,8 @@ func (m command) generateSpec() (*specs.Spec, error) {
return nil, fmt.Errorf("falied to generate CDI spec for MIG devices: %v", err)
}
spec.ContainerEdits.DeviceNodes = m.getExistingMetaDeviceNodes()
libraries, err := m.findLibs(nvmllib)
if err != nil {
return nil, fmt.Errorf("failed to locate driver libraries: %v", err)
@ -201,18 +203,13 @@ func (m command) generateSpec() (*specs.Spec, error) {
}
func generateEditsForDevice(name string, d deviceInfo) (specs.Device, error) {
var deviceNodes []*specs.DeviceNode
deviceNodePaths, err := d.GetDeviceNodes()
if err != nil {
return specs.Device{}, fmt.Errorf("failed to get paths for device: %v", err)
}
for _, p := range deviceNodePaths {
deviceNode := specs.DeviceNode{
Path: p,
}
deviceNodes = append(deviceNodes, &deviceNode)
}
deviceNodes := getDeviceNodesFromPaths(deviceNodePaths)
device := specs.Device{
Name: name,
ContainerEdits: specs.ContainerEdits{
@ -223,6 +220,38 @@ func generateEditsForDevice(name string, d deviceInfo) (specs.Device, error) {
return device, nil
}
func (m command) getExistingMetaDeviceNodes() []*specs.DeviceNode {
metaDeviceNodePaths := []string{
"/dev/nvidia-modeset",
"/dev/nvidia-uvm-tools",
"/dev/nvidia-uvm",
"/dev/nvidiactl",
}
var existingDeviceNodePaths []string
for _, p := range metaDeviceNodePaths {
if _, err := os.Stat(p); err != nil {
m.logger.Infof("Ignoring missing meta device %v", p)
continue
}
existingDeviceNodePaths = append(existingDeviceNodePaths, p)
}
return getDeviceNodesFromPaths(existingDeviceNodePaths)
}
func getDeviceNodesFromPaths(deviceNodePaths []string) []*specs.DeviceNode {
var deviceNodes []*specs.DeviceNode
for _, p := range deviceNodePaths {
deviceNode := specs.DeviceNode{
Path: p,
}
deviceNodes = append(deviceNodes, &deviceNode)
}
return deviceNodes
}
func (m command) findLibs(nvmllib nvml.Interface) ([]string, error) {
version, r := nvmllib.SystemGetDriverVersion()
if r != nvml.SUCCESS {