mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
/**
|
|
# Copyright (c) NVIDIA CORPORATION. All rights reserved.
|
|
#
|
|
# 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 devchar
|
|
|
|
import (
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
type nodeLister interface {
|
|
DeviceNodes() ([]deviceNode, error)
|
|
}
|
|
|
|
type existing struct {
|
|
logger logger.Interface
|
|
devRoot string
|
|
}
|
|
|
|
// DeviceNodes returns a list of NVIDIA device nodes in the specified root.
|
|
// The nvidia-nvswitch* and nvidia-nvlink devices are excluded.
|
|
func (m existing) DeviceNodes() ([]deviceNode, error) {
|
|
locator := lookup.NewCharDeviceLocator(
|
|
lookup.WithLogger(m.logger),
|
|
lookup.WithRoot(m.devRoot),
|
|
lookup.WithOptional(true),
|
|
)
|
|
|
|
devices, err := locator.Locate("/dev/nvidia*")
|
|
if err != nil {
|
|
m.logger.Warningf("Error while locating device: %v", err)
|
|
}
|
|
|
|
capDevices, err := locator.Locate("/dev/nvidia-caps/nvidia-*")
|
|
if err != nil {
|
|
m.logger.Warningf("Error while locating caps device: %v", err)
|
|
}
|
|
|
|
if len(devices) == 0 && len(capDevices) == 0 {
|
|
m.logger.Infof("No NVIDIA devices found in %s", m.devRoot)
|
|
return nil, nil
|
|
}
|
|
|
|
var deviceNodes []deviceNode
|
|
for _, d := range append(devices, capDevices...) {
|
|
if m.nodeIsBlocked(d) {
|
|
continue
|
|
}
|
|
var stat unix.Stat_t
|
|
err := unix.Stat(d, &stat)
|
|
if err != nil {
|
|
m.logger.Warningf("Could not stat device: %v", err)
|
|
continue
|
|
}
|
|
deviceNodes = append(deviceNodes, newDeviceNode(d, stat))
|
|
}
|
|
|
|
return deviceNodes, nil
|
|
}
|
|
|
|
// nodeIsBlocked returns true if the specified device node should be ignored.
|
|
func (m existing) nodeIsBlocked(path string) bool {
|
|
blockedPrefixes := []string{"nvidia-fs", "nvidia-nvswitch", "nvidia-nvlink"}
|
|
nodeName := filepath.Base(path)
|
|
for _, prefix := range blockedPrefixes {
|
|
if strings.HasPrefix(nodeName, prefix) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|