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package system
import (
"context"
"fmt"
"strings"
"time"
"github.com/goss-org/goss/util"
"github.com/moby/sys/mountinfo"
"github.com/samber/lo"
)
type Mount interface {
MountPoint() string
Exists() (bool, error)
Opts() ([]string, error)
VfsOpts() ([]string, error)
Source() (string, error)
Filesystem() (string, error)
Usage() (int, error)
}
type DefMount struct {
mountPoint string
loaded bool
exists bool
mountInfo *mountinfo.Info
usage int
Timeout int
err error
}
func NewDefMount(_ context.Context, mountPoint string, system *System, config util.Config) Mount {
return &DefMount{
mountPoint: mountPoint,
Timeout: config.TimeOutMilliSeconds(),
}
}
func (m *DefMount) setup() error {
if m.loaded {
return m.err
}
m.loaded = true
mountInfo, err := getMount(m.mountPoint, m.Timeout)
if err != nil {
m.exists = false
m.err = err
return m.err
}
m.mountInfo = mountInfo
m.exists = true
usage, err := getUsage(m.mountPoint)
if err != nil {
m.err = err
return m.err
}
m.usage = usage
return nil
}
func (m *DefMount) ID() string {
return m.mountPoint
}
func (m *DefMount) MountPoint() string {
return m.mountPoint
}
func (m *DefMount) Exists() (bool, error) {
if err := m.setup(); err != nil {
return false, err
}
return m.exists, nil
}
func (m *DefMount) Opts() ([]string, error) {
if err := m.setup(); err != nil {
return nil, err
}
allOpts := splitMountInfo(m.mountInfo.Options)
return lo.Uniq(allOpts), nil
}
func (m *DefMount) VfsOpts() ([]string, error) {
if err := m.setup(); err != nil {
return nil, err
}
opts := splitMountInfo(m.mountInfo.VFSOptions)
return opts, nil
}
func (m *DefMount) Source() (string, error) {
if err := m.setup(); err != nil {
return "", err
}
return m.mountInfo.Source, nil
}
func (m *DefMount) Filesystem() (string, error) {
if err := m.setup(); err != nil {
return "", err
}
return m.mountInfo.FSType, nil
}
func (m *DefMount) Usage() (int, error) {
if err := m.setup(); err != nil {
return -1, err
}
return m.usage, nil
}
func getMount(mountpoint string, timeout int) (*mountinfo.Info, error) {
c1 := make(chan *mountinfo.Info, 1)
e1 := make(chan error, 1)
timeoutD := time.Duration(timeout) * time.Millisecond
go func() {
entries, err := mountinfo.GetMounts(mountinfo.SingleEntryFilter(mountpoint))
if err != nil {
e1 <- err
return
}
if len(entries) == 0 {
e1 <- fmt.Errorf("Mountpoint not found")
return
}
c1 <- entries[0]
}()
select {
case result := <-c1:
return result, nil
case err := <-e1:
return nil, err
case <-time.After(timeoutD):
return nil, fmt.Errorf("getMount operation timed out after %s milliseconds", timeoutD)
}
}
func splitMountInfo(s string) []string {
quoted := false
return strings.FieldsFunc(s, func(r rune) bool {
if r == '"' {
quoted = !quoted
}
return !quoted && r == ','
})
}
|
