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Bump Libcontainer to latest head

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This commit is contained in:
Buddha Prakash
2016-08-04 10:04:14 -07:00
parent 20444ac84d
commit 216d707f28
43 changed files with 866 additions and 410 deletions
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75
vendor/github.com/opencontainers/runc/libcontainer/process_linux.go generated vendored
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@@ -51,6 +51,7 @@ type setnsProcess struct {
fds []string
process *Process
bootstrapData io.Reader
rootDir *os.File
}
func (p *setnsProcess) startTime() (string, error) {
@@ -69,48 +70,49 @@ func (p *setnsProcess) start() (err error) {
defer p.parentPipe.Close()
err = p.cmd.Start()
p.childPipe.Close()
p.rootDir.Close()
if err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "starting setns process")
}
if p.bootstrapData != nil {
if _, err := io.Copy(p.parentPipe, p.bootstrapData); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "copying bootstrap data to pipe")
}
}
if err = p.execSetns(); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "executing setns process")
}
if len(p.cgroupPaths) > 0 {
if err := cgroups.EnterPid(p.cgroupPaths, p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCausef(err, "adding pid %d to cgroups", p.pid())
}
}
// set oom_score_adj
if err := setOomScoreAdj(p.config.Config.OomScoreAdj, p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "setting oom score")
}
// set rlimits, this has to be done here because we lose permissions
// to raise the limits once we enter a user-namespace
if err := setupRlimits(p.config.Rlimits, p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "setting rlimits for process")
}
if err := utils.WriteJSON(p.parentPipe, p.config); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "writing config to pipe")
}
if err := syscall.Shutdown(int(p.parentPipe.Fd()), syscall.SHUT_WR); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "calling shutdown on init pipe")
}
// wait for the child process to fully complete and receive an error message
// if one was encoutered
var ierr *genericError
if err := json.NewDecoder(p.parentPipe).Decode(&ierr); err != nil && err != io.EOF {
return newSystemError(err)
return newSystemErrorWithCause(err, "decoding init error from pipe")
}
// Must be done after Shutdown so the child will exit and we can wait for it.
if ierr != nil {
p.wait()
return newSystemError(ierr)
return ierr
}
return nil
}
@@ -123,7 +125,7 @@ func (p *setnsProcess) execSetns() error {
status, err := p.cmd.Process.Wait()
if err != nil {
p.cmd.Wait()
return newSystemError(err)
return newSystemErrorWithCause(err, "waiting on setns process to finish")
}
if !status.Success() {
p.cmd.Wait()
@@ -132,7 +134,7 @@ func (p *setnsProcess) execSetns() error {
var pid *pid
if err := json.NewDecoder(p.parentPipe).Decode(&pid); err != nil {
p.cmd.Wait()
return newSystemError(err)
return newSystemErrorWithCause(err, "reading pid from init pipe")
}
process, err := os.FindProcess(pid.Pid)
if err != nil {
@@ -186,6 +188,7 @@ type initProcess struct {
process *Process
bootstrapData io.Reader
sharePidns bool
rootDir *os.File
}
func (p *initProcess) pid() int {
@@ -221,6 +224,7 @@ func (p *initProcess) execSetns() error {
return err
}
p.cmd.Process = process
p.process.ops = p
return nil
}
@@ -229,28 +233,29 @@ func (p *initProcess) start() error {
err := p.cmd.Start()
p.process.ops = p
p.childPipe.Close()
p.rootDir.Close()
if err != nil {
p.process.ops = nil
return newSystemError(err)
return newSystemErrorWithCause(err, "starting init process command")
}
if _, err := io.Copy(p.parentPipe, p.bootstrapData); err != nil {
return err
}
if err := p.execSetns(); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "running exec setns process for init")
}
// Save the standard descriptor names before the container process
// can potentially move them (e.g., via dup2()). If we don't do this now,
// we won't know at checkpoint time which file descriptor to look up.
fds, err := getPipeFds(p.pid())
if err != nil {
return newSystemError(err)
return newSystemErrorWithCausef(err, "getting pipe fds for pid %d", p.pid())
}
p.setExternalDescriptors(fds)
// Do this before syncing with child so that no children
// can escape the cgroup
if err := p.manager.Apply(p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "applying cgroup configuration for process")
}
defer func() {
if err != nil {
@@ -259,10 +264,10 @@ func (p *initProcess) start() error {
}
}()
if err := p.createNetworkInterfaces(); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "creating nework interfaces")
}
if err := p.sendConfig(); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "sending config to init process")
}
var (
procSync syncT
@@ -278,21 +283,21 @@ loop:
if err == io.EOF {
break loop
}
return newSystemError(err)
return newSystemErrorWithCause(err, "decoding sync type from init pipe")
}
switch procSync.Type {
case procReady:
if err := p.manager.Set(p.config.Config); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "setting cgroup config for ready process")
}
// set oom_score_adj
if err := setOomScoreAdj(p.config.Config.OomScoreAdj, p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "setting oom score for ready process")
}
// set rlimits, this has to be done here because we lose permissions
// to raise the limits once we enter a user-namespace
if err := setupRlimits(p.config.Rlimits, p.pid()); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "setting rlimits for ready process")
}
// call prestart hooks
if !p.config.Config.Namespaces.Contains(configs.NEWNS) {
@@ -303,16 +308,16 @@ loop:
Pid: p.pid(),
Root: p.config.Config.Rootfs,
}
for _, hook := range p.config.Config.Hooks.Prestart {
for i, hook := range p.config.Config.Hooks.Prestart {
if err := hook.Run(s); err != nil {
return newSystemError(err)
return newSystemErrorWithCausef(err, "running prestart hook %d", i)
}
}
}
}
// Sync with child.
if err := utils.WriteJSON(p.parentPipe, syncT{procRun}); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "reading syncT run type")
}
sentRun = true
case procHooks:
@@ -324,22 +329,22 @@ loop:
Root: p.config.Config.Rootfs,
BundlePath: utils.SearchLabels(p.config.Config.Labels, "bundle"),
}
for _, hook := range p.config.Config.Hooks.Prestart {
for i, hook := range p.config.Config.Hooks.Prestart {
if err := hook.Run(s); err != nil {
return newSystemError(err)
return newSystemErrorWithCausef(err, "running prestart hook %d", i)
}
}
}
// Sync with child.
if err := utils.WriteJSON(p.parentPipe, syncT{procResume}); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "reading syncT resume type")
}
sentResume = true
case procError:
// wait for the child process to fully complete and receive an error message
// if one was encoutered
if err := dec.Decode(&ierr); err != nil && err != io.EOF {
return newSystemError(err)
return newSystemErrorWithCause(err, "decoding proc error from init")
}
if ierr != nil {
break loop
@@ -347,22 +352,22 @@ loop:
// Programmer error.
panic("No error following JSON procError payload.")
default:
return newSystemError(fmt.Errorf("invalid JSON synchronisation payload from child"))
return newSystemError(fmt.Errorf("invalid JSON payload from child"))
}
}
if !sentRun {
return newSystemError(fmt.Errorf("could not synchronise with container process: %v", ierr))
return newSystemErrorWithCause(ierr, "container init failed")
}
if p.config.Config.Namespaces.Contains(configs.NEWNS) && !sentResume {
return newSystemError(fmt.Errorf("could not synchronise after executing prestart hooks with container process"))
}
if err := syscall.Shutdown(int(p.parentPipe.Fd()), syscall.SHUT_WR); err != nil {
return newSystemError(err)
return newSystemErrorWithCause(err, "shutting down init pipe")
}
// Must be done after Shutdown so the child will exit and we can wait for it.
if ierr != nil {
p.wait()
return newSystemError(ierr)
return ierr
}
return nil
}
@@ -447,7 +452,7 @@ func getPipeFds(pid int) ([]string, error) {
// InitializeIO creates pipes for use with the process's STDIO
// and returns the opposite side for each
func (p *Process) InitializeIO(rootuid int) (i *IO, err error) {
func (p *Process) InitializeIO(rootuid, rootgid int) (i *IO, err error) {
var fds []uintptr
i = &IO{}
// cleanup in case of an error
@@ -479,7 +484,7 @@ func (p *Process) InitializeIO(rootuid int) (i *IO, err error) {
p.Stderr, i.Stderr = w, r
// change ownership of the pipes incase we are in a user namespace
for _, fd := range fds {
if err := syscall.Fchown(int(fd), rootuid, rootuid); err != nil {
if err := syscall.Fchown(int(fd), rootuid, rootgid); err != nil {
return nil, err
}
}