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validate: Move syscalls into validate_posix #565

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116 changes: 35 additions & 81 deletions validate/validate.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,6 @@ import (
"regexp"
"runtime"
"strings"
"syscall"
"unicode"
"unicode/utf8"

Expand Down Expand Up @@ -641,6 +640,38 @@ func (v *Validator) CheckLinux() (errs error) {
errs = multierror.Append(errs, fmt.Errorf("on Linux, hostname requires a new UTS namespace to be specified as well"))
}

errs = multierror.Append(errs, v.CheckLinuxDevices())

if v.spec.Linux.Resources != nil {
errs = multierror.Append(errs, v.CheckLinuxResources())
}

for _, maskedPath := range v.spec.Linux.MaskedPaths {
if !strings.HasPrefix(maskedPath, "/") {
errs = multierror.Append(errs,
specerror.NewError(
specerror.MaskedPathsAbs,
fmt.Errorf("maskedPath %v is not an absolute path", maskedPath),
rspec.Version))
}
}

for _, readonlyPath := range v.spec.Linux.ReadonlyPaths {
if !strings.HasPrefix(readonlyPath, "/") {
errs = multierror.Append(errs,
specerror.NewError(
specerror.ReadonlyPathsAbs,
fmt.Errorf("readonlyPath %v is not an absolute path", readonlyPath),
rspec.Version))
}
}

return
}

// CheckLinuxDevices checks v.spec.LinuxDevices.
func (v *Validator) CheckLinuxDevices() (errs error) {
logrus.Debugf("check linux.devices")
// Linux devices validation
devList := make(map[string]bool)
devTypeList := make(map[string]bool)
Expand All @@ -654,6 +685,7 @@ func (v *Validator) CheckLinux() (errs error) {
errs = multierror.Append(errs, fmt.Errorf("device %s is duplicated", device.Path))
} else {
var rootfsPath string
// FIXME: use osFilepath for this
if filepath.IsAbs(v.spec.Root.Path) {
rootfsPath = v.spec.Root.Path
} else {
Expand All @@ -666,61 +698,7 @@ func (v *Validator) CheckLinux() (errs error) {
} else if err != nil {
errs = multierror.Append(errs, err)
} else {
fStat, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesAvailable,
fmt.Errorf("cannot determine state for device %s", device.Path), rspec.Version))
continue
}
var devType string
switch fStat.Mode & syscall.S_IFMT {
case syscall.S_IFCHR:
devType = "c"
case syscall.S_IFBLK:
devType = "b"
case syscall.S_IFIFO:
devType = "p"
default:
devType = "unmatched"
}
if devType != device.Type || (devType == "c" && device.Type == "u") {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
continue
}
if devType != "p" {
dev := fStat.Rdev
major := (dev >> 8) & 0xfff
minor := (dev & 0xff) | ((dev >> 12) & 0xfff00)
if int64(major) != device.Major || int64(minor) != device.Minor {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
continue
}
}
if device.FileMode != nil {
expectedPerm := *device.FileMode & os.ModePerm
actualPerm := fi.Mode() & os.ModePerm
if expectedPerm != actualPerm {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
continue
}
}
if device.UID != nil {
if *device.UID != fStat.Uid {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
continue
}
}
if device.GID != nil {
if *device.GID != fStat.Gid {
errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
continue
}
}
errs = multierror.Append(errs, v.checkPosixFilesystemDevice(&device, fi))
}
}

Expand All @@ -739,31 +717,7 @@ func (v *Validator) CheckLinux() (errs error) {
}
}

if v.spec.Linux.Resources != nil {
errs = multierror.Append(errs, v.CheckLinuxResources())
}

for _, maskedPath := range v.spec.Linux.MaskedPaths {
if !strings.HasPrefix(maskedPath, "/") {
errs = multierror.Append(errs,
specerror.NewError(
specerror.MaskedPathsAbs,
fmt.Errorf("maskedPath %v is not an absolute path", maskedPath),
rspec.Version))
}
}

for _, readonlyPath := range v.spec.Linux.ReadonlyPaths {
if !strings.HasPrefix(readonlyPath, "/") {
errs = multierror.Append(errs,
specerror.NewError(
specerror.ReadonlyPathsAbs,
fmt.Errorf("readonlyPath %v is not an absolute path", readonlyPath),
rspec.Version))
}
}

return
return errs
}

// CheckLinuxResources checks v.spec.Linux.Resources
Expand Down
67 changes: 67 additions & 0 deletions validate/validate_posix.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,67 @@
// +build linux solaris

package validate

import (
"fmt"
"os"
"syscall"

"github.com/hashicorp/go-multierror"
rspec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/specerror"
)

func (v *Validator) checkPosixFilesystemDevice(device *rspec.LinuxDevice, info os.FileInfo) (err error) {
fStat, ok := info.Sys().(*syscall.Stat_t)
if !ok {
return multierror.Append(err, specerror.NewError(specerror.DevicesAvailable,
fmt.Errorf("cannot determine state for device %s", device.Path), rspec.Version))
}
var devType string
switch fStat.Mode & syscall.S_IFMT {
case syscall.S_IFCHR:
devType = "c"
case syscall.S_IFBLK:
devType = "b"
case syscall.S_IFIFO:
devType = "p"
default:
devType = "unmatched"
}
if devType != device.Type || (devType == "c" && device.Type == "u") {
err = multierror.Append(err, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
}
if devType != "p" {
dev := fStat.Rdev
major := (dev >> 8) & 0xfff
minor := (dev & 0xff) | ((dev >> 12) & 0xfff00)
if int64(major) != device.Major || int64(minor) != device.Minor {
err = multierror.Append(err, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
}
}
if device.FileMode != nil {
expectedPerm := *device.FileMode & os.ModePerm
actualPerm := info.Mode() & os.ModePerm
if expectedPerm != actualPerm {
err = multierror.Append(err, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
}
}
if device.UID != nil {
if *device.UID != fStat.Uid {
err = multierror.Append(err, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
}
}
if device.GID != nil {
if *device.GID != fStat.Gid {
err = multierror.Append(err, specerror.NewError(specerror.DevicesFileNotMatch,
fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
}
}

return err
}
12 changes: 12 additions & 0 deletions validate/validate_windows.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
package validate

import (
"runtime"

"github.com/sirupsen/logrus"
)

func (v *Validator) checkPosixFilesystemDevice(device *rspec.LinuxDevice, info os.FileInfo) (err error) {
logrus.Warnf("checking POSIX devices is not supported on %s", runtime.GOOS)
return nil
}