| //go:build linux |
| |
| package overlay2 |
| |
| import ( |
| "runtime" |
| |
| "golang.org/x/sys/unix" |
| ) |
| |
| func mountFrom(dir, device, target, mType string, flags uintptr, label string) error { |
| chErr := make(chan error, 1) |
| |
| go func() { |
| runtime.LockOSThread() |
| // Do not unlock this thread as the thread state cannot be restored |
| // We do not want go to re-use this thread for anything else. |
| |
| if err := unix.Unshare(unix.CLONE_FS); err != nil { |
| chErr <- err |
| return |
| } |
| if err := unix.Chdir(dir); err != nil { |
| chErr <- err |
| return |
| } |
| chErr <- unix.Mount(device, target, mType, flags, label) |
| }() |
| return <-chErr |
| } |
