112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
package main
|
|
|
|
import (
|
|
"bufio"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"strings"
|
|
"syscall"
|
|
)
|
|
|
|
const (
|
|
msSysfs = syscall.MS_NODEV | syscall.MS_NOEXEC | syscall.MS_NOSUID
|
|
)
|
|
|
|
func init() {
|
|
services.Register(
|
|
&CommandService{
|
|
Name: "kmod-static-nodes",
|
|
PreExec: func() error {
|
|
mkdir("/run/tmpfiles.d", 0755)
|
|
return nil
|
|
},
|
|
Command: []string{"kmod", "static-nodes", "--format=tmpfiles",
|
|
"--output=/run/tmpfiles.d/kmod.conf"},
|
|
},
|
|
&Oneshot{
|
|
Name: "devfs",
|
|
Func: func() error {
|
|
for _, mount := range []struct {
|
|
fstype string
|
|
target string
|
|
mode os.FileMode
|
|
flags uintptr
|
|
data string
|
|
source string
|
|
}{
|
|
{"mqueue", "/dev/mqueue", 01777, syscall.MS_NODEV, "", "mqueue"},
|
|
{"devpts", "/dev/pts", 0755, 0, "gid=5", "devpts"},
|
|
{"tmpfs", "/dev/shm", 01777, syscall.MS_NODEV, "mode=1777", "shm"},
|
|
{"tmpfs", "/sys/fs/cgroup", 0755, 0, "mode=755,size=10m", "cgroup"},
|
|
} {
|
|
initLog.Print("mounting ", mount.target)
|
|
|
|
flags := syscall.MS_NOEXEC | syscall.MS_NOSUID | mount.flags
|
|
|
|
mkdir(mount.target, mount.mode)
|
|
err := syscall.Mount(mount.source, mount.target, mount.fstype, flags, mount.data)
|
|
if err != nil {
|
|
fatalf("mount failed: %v", err)
|
|
}
|
|
}
|
|
|
|
// mount cgroup controllers
|
|
for line := range readLines("/proc/cgroups") {
|
|
parts := strings.Split(line, "\t")
|
|
name, enabled := parts[0], parts[3]
|
|
|
|
if enabled != "1" {
|
|
continue
|
|
}
|
|
|
|
initLog.Print("mounting cgroup fs for controller ", name)
|
|
|
|
mp := "/sys/fs/cgroup/" + name
|
|
mkdir(mp, 0755)
|
|
mount(name, mp, "cgroup", msSysfs, name)
|
|
}
|
|
|
|
if err := ioutil.WriteFile("/sys/fs/cgroup/memory/memory.use_hierarchy",
|
|
[]byte{'1'}, 0644); err != nil {
|
|
initLog.Print("failed to enable use_hierarchy in memory cgroup: ", err)
|
|
}
|
|
|
|
return nil
|
|
},
|
|
},
|
|
&CommandService{
|
|
Name: "dmesg",
|
|
Command: []string{"dmesg", "-n", "warn"},
|
|
},
|
|
)
|
|
}
|
|
|
|
func readLines(path string) chan string {
|
|
f, err := os.Open(path)
|
|
if err != nil {
|
|
fatalf("failed to open %s: %v", path, err)
|
|
}
|
|
|
|
bf := bufio.NewReader(f)
|
|
|
|
ch := make(chan string, 1)
|
|
|
|
go func() {
|
|
defer f.Close()
|
|
defer close(ch)
|
|
|
|
for {
|
|
line, err := bf.ReadString('\n')
|
|
if err == io.EOF {
|
|
break
|
|
} else if err != nil {
|
|
fatalf("error while reading %s: %v", path, err)
|
|
}
|
|
ch <- line[:len(line)-1]
|
|
}
|
|
}()
|
|
|
|
return ch
|
|
}
|