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98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
// Copyright 2014 Google Inc. 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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//go:build linux
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package vfs
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import (
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"strings"
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"github.com/google/cadvisor/fs"
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"github.com/google/cadvisor/utils"
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mount "github.com/moby/sys/mountinfo"
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"k8s.io/klog/v2"
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)
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type vfsPlugin struct{}
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// NewPlugin creates a new VFS filesystem plugin.
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func NewPlugin() fs.FsPlugin {
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return &vfsPlugin{}
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}
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func (p *vfsPlugin) Name() string {
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return "vfs"
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}
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// CanHandle returns true for standard filesystems that use VFS stats.
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// This includes ext2/3/4, xfs, and similar block-based filesystems.
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// Virtual/pseudo filesystems (proc, sysfs, cgroup, etc.) are excluded.
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func (p *vfsPlugin) CanHandle(fsType string) bool {
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// Exclude virtual/pseudo filesystems that don't have real disk backing
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switch fsType {
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case "cgroup", "cgroup2", "cpuset", "mqueue", "proc", "sysfs",
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"devtmpfs", "devpts", "securityfs", "debugfs", "tracefs",
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"pstore", "configfs", "fusectl", "hugetlbfs", "autofs",
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"binfmt_misc", "efivarfs", "rpc_pipefs", "nsfs":
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return false
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}
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// VFS can handle most standard Linux filesystems
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if strings.HasPrefix(fsType, "ext") {
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return true
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}
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switch fsType {
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case "xfs", "squashfs", "f2fs", "jfs", "reiserfs", "hfs", "hfsplus",
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"ntfs", "vfat", "fat", "msdos", "exfat", "udf", "iso9660":
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return true
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}
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// Don't act as a general fallback - only handle known filesystem types
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return false
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}
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// Priority returns 0 - VFS is the lowest priority fallback plugin.
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func (p *vfsPlugin) Priority() int {
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return 0
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}
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// GetStats returns filesystem statistics using the statfs syscall.
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func (p *vfsPlugin) GetStats(device string, partition fs.PartitionInfo) (*fs.FsStats, error) {
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if !utils.FileExists(partition.Mountpoint) {
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klog.V(4).Infof("VFS: mountpoint does not exist: %v", partition.Mountpoint)
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return nil, nil
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}
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capacity, free, avail, inodes, inodesFree, err := GetVfsStats(partition.Mountpoint)
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if err != nil {
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return nil, err
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}
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return &fs.FsStats{
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Capacity: capacity,
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Free: free,
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Available: avail,
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Inodes: &inodes,
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InodesFree: &inodesFree,
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Type: fs.VFS,
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}, nil
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}
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// ProcessMount handles standard mount processing.
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// For VFS, no special processing is needed.
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func (p *vfsPlugin) ProcessMount(mnt *mount.Info) (bool, *mount.Info, error) {
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return true, mnt, nil
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}
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