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bpf_utils.go
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/
bpf_utils.go
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// Copyright (c) 2022 Tigera, Inc. 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 bpfutils
import (
"sync"
"os"
log "github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
)
var memLockOnce sync.Once
var BTFEnabled bool
func init() {
BTFEnabled = SupportsBTF()
}
func SupportsBTF() bool {
_, err := os.Stat("/sys/kernel/btf/vmlinux")
if err != nil {
log.WithError(err).Debug("BTF not supported")
return false
}
return true
}
func IncreaseLockedMemoryQuota() {
memLockOnce.Do(func() {
err := unix.Setrlimit(unix.RLIMIT_MEMLOCK, &unix.Rlimit{Cur: unix.RLIM_INFINITY, Max: unix.RLIM_INFINITY})
if err != nil {
log.WithError(err).Error("Failed to increase RLIMIT_MEMLOCK, loading BPF programs may fail")
}
})
}