mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 16:30:55 +01:00
64 lines
2.1 KiB
Go
64 lines
2.1 KiB
Go
// Copyright 2020 The Prometheus Authors
|
|
// 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.
|
|
|
|
//go:build !windows
|
|
// +build !windows
|
|
|
|
package procfs
|
|
|
|
import (
|
|
"os"
|
|
|
|
"github.com/prometheus/procfs/internal/util"
|
|
)
|
|
|
|
// KernelRandom contains information about to the kernel's random number generator.
|
|
type KernelRandom struct {
|
|
// EntropyAvaliable gives the available entropy, in bits.
|
|
EntropyAvaliable *uint64
|
|
// PoolSize gives the size of the entropy pool, in bits.
|
|
PoolSize *uint64
|
|
// URandomMinReseedSeconds is the number of seconds after which the DRNG will be reseeded.
|
|
URandomMinReseedSeconds *uint64
|
|
// WriteWakeupThreshold the number of bits of entropy below which we wake up processes
|
|
// that do a select(2) or poll(2) for write access to /dev/random.
|
|
WriteWakeupThreshold *uint64
|
|
// ReadWakeupThreshold is the number of bits of entropy required for waking up processes that sleep
|
|
// waiting for entropy from /dev/random.
|
|
ReadWakeupThreshold *uint64
|
|
}
|
|
|
|
// KernelRandom returns values from /proc/sys/kernel/random.
|
|
func (fs FS) KernelRandom() (KernelRandom, error) {
|
|
random := KernelRandom{}
|
|
|
|
for file, p := range map[string]**uint64{
|
|
"entropy_avail": &random.EntropyAvaliable,
|
|
"poolsize": &random.PoolSize,
|
|
"urandom_min_reseed_secs": &random.URandomMinReseedSeconds,
|
|
"write_wakeup_threshold": &random.WriteWakeupThreshold,
|
|
"read_wakeup_threshold": &random.ReadWakeupThreshold,
|
|
} {
|
|
val, err := util.ReadUintFromFile(fs.proc.Path("sys", "kernel", "random", file))
|
|
if os.IsNotExist(err) {
|
|
continue
|
|
}
|
|
if err != nil {
|
|
return random, err
|
|
}
|
|
*p = &val
|
|
}
|
|
|
|
return random, nil
|
|
}
|