mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-04 02:21:02 +08:00
Jakub Nyckowski
35a5688a79
* Move BPF event filtering to the kernel #19354 moved filtering of disk events to the kernel space. This PR continues work in this area and moves all events to be filtered in the kernel space. * Improve comments. Minor code fixes.
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
//go:build bpf && !386
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// +build bpf,!386
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/*
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*
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* Copyright 2023 Gravitational, Inc.
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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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*/
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package bpf
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import (
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"unsafe"
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"github.com/aquasecurity/libbpfgo"
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"github.com/gravitational/trace"
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)
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const monitoredCGroups = "monitored_cgroups"
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type session struct {
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module *libbpfgo.Module
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}
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// startSession registers the given cgroup in the BPF module. Only registered
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// cgroups will return events to the userspace.
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func (s *session) startSession(cgroupID uint64) error {
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cgroupMap, err := s.module.GetMap(monitoredCGroups)
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if err != nil {
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return trace.Wrap(err)
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}
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dummyVal := 0
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err = cgroupMap.Update(unsafe.Pointer(&cgroupID), unsafe.Pointer(&dummyVal))
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if err != nil {
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return trace.Wrap(err)
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}
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return nil
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}
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// endSession removes the previously registered cgroup from the BPF module.
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func (s *session) endSession(cgroupID uint64) error {
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cgroupMap, err := s.module.GetMap(monitoredCGroups)
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if err != nil {
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return trace.Wrap(err)
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}
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if err := cgroupMap.DeleteKey(unsafe.Pointer(&cgroupID)); err != nil {
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return trace.Wrap(err)
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}
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return nil
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}
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