mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
f5a4b23041
This allows for dev nodes to be created in cases where the driver root and the dev root do not match. Signed-off-by: Evan Lezar <elezar@nvidia.com>
139 lines
3.7 KiB
Go
139 lines
3.7 KiB
Go
/**
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# Copyright (c) NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package createdevicenodes
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import (
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"fmt"
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"github.com/urfave/cli/v2"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/system/nvdevices"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/system/nvmodules"
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)
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type command struct {
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logger logger.Interface
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}
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type options struct {
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driverRoot string
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devRoot string
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dryRun bool
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control bool
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loadKernelModules bool
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}
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// NewCommand constructs a command sub-command with the specified logger
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func NewCommand(logger logger.Interface) *cli.Command {
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c := command{
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logger: logger,
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}
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return c.build()
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}
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// build
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func (m command) build() *cli.Command {
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opts := options{}
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c := cli.Command{
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Name: "create-device-nodes",
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Usage: "A utility to create NVIDIA device nodes",
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Before: func(c *cli.Context) error {
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return m.validateFlags(c, &opts)
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},
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Action: func(c *cli.Context) error {
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return m.run(c, &opts)
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},
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}
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c.Flags = []cli.Flag{
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&cli.StringFlag{
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Name: "driver-root",
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Usage: "the path to the driver root. Device nodes will be created at `DRIVER_ROOT`/dev",
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Value: "/",
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Destination: &opts.driverRoot,
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EnvVars: []string{"NVIDIA_DRIVER_ROOT", "DRIVER_ROOT"},
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},
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&cli.StringFlag{
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Name: "dev-root",
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Usage: "specify the root where `/dev` is located. If this is not specified, the root is assumed.",
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Destination: &opts.devRoot,
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EnvVars: []string{"NVIDIA_DEV_ROOT", "DEV_ROOT"},
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},
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&cli.BoolFlag{
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Name: "control-devices",
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Usage: "create all control device nodes: nvidiactl, nvidia-modeset, nvidia-uvm, nvidia-uvm-tools",
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Destination: &opts.control,
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},
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&cli.BoolFlag{
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Name: "load-kernel-modules",
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Usage: "load the NVIDIA Kernel Modules before creating devices nodes",
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Destination: &opts.loadKernelModules,
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},
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&cli.BoolFlag{
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Name: "dry-run",
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Usage: "if set, the command will not perform any operations",
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Value: false,
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Destination: &opts.dryRun,
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EnvVars: []string{"DRY_RUN"},
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},
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}
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return &c
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}
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func (m command) validateFlags(r *cli.Context, opts *options) error {
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if opts.devRoot == "" && opts.driverRoot != "" {
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m.logger.Infof("Using dev-root %q", opts.driverRoot)
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opts.devRoot = opts.driverRoot
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}
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return nil
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}
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func (m command) run(c *cli.Context, opts *options) error {
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if opts.loadKernelModules {
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modules := nvmodules.New(
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nvmodules.WithLogger(m.logger),
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nvmodules.WithDryRun(opts.dryRun),
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nvmodules.WithRoot(opts.driverRoot),
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)
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if err := modules.LoadAll(); err != nil {
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return fmt.Errorf("failed to load NVIDIA kernel modules: %v", err)
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}
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}
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if opts.control {
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devices, err := nvdevices.New(
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nvdevices.WithLogger(m.logger),
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nvdevices.WithDryRun(opts.dryRun),
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nvdevices.WithDevRoot(opts.devRoot),
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)
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if err != nil {
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return err
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}
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m.logger.Infof("Creating control device nodes at %s", opts.devRoot)
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if err := devices.CreateNVIDIAControlDevices(); err != nil {
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return fmt.Errorf("failed to create NVIDIA control device nodes: %v", err)
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}
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}
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return nil
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}
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