mirror of
https://github.com/gravitational/teleport.git
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67 lines
1.7 KiB
Go
67 lines
1.7 KiB
Go
//go:build bpf && !386
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// +build bpf,!386
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/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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