diff options
Diffstat (limited to 'pkg/sentry/syscalls/linux/vfs2/fd.go')
| -rw-r--r-- | pkg/sentry/syscalls/linux/vfs2/fd.go | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/pkg/sentry/syscalls/linux/vfs2/fd.go b/pkg/sentry/syscalls/linux/vfs2/fd.go index 36e89700e..7dd9ef857 100644 --- a/pkg/sentry/syscalls/linux/vfs2/fd.go +++ b/pkg/sentry/syscalls/linux/vfs2/fd.go @@ -165,7 +165,7 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall ownerType = linux.F_OWNER_PGRP who = -who } - return 0, nil, setAsyncOwner(t, file, ownerType, who) + return 0, nil, setAsyncOwner(t, int(fd), file, ownerType, who) case linux.F_GETOWN_EX: owner, hasOwner := getAsyncOwner(t, file) if !hasOwner { @@ -179,7 +179,7 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall if err != nil { return 0, nil, err } - return 0, nil, setAsyncOwner(t, file, owner.Type, owner.PID) + return 0, nil, setAsyncOwner(t, int(fd), file, owner.Type, owner.PID) case linux.F_SETPIPE_SZ: pipefile, ok := file.Impl().(*pipe.VFSPipeFD) if !ok { @@ -207,6 +207,16 @@ func Fcntl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall return 0, nil, err case linux.F_SETLK, linux.F_SETLKW: return 0, nil, posixLock(t, args, file, cmd) + case linux.F_GETSIG: + a := file.AsyncHandler() + if a == nil { + // Default behavior aka SIGIO. + return 0, nil, nil + } + return uintptr(a.(*fasync.FileAsync).Signal()), nil, nil + case linux.F_SETSIG: + a := file.SetAsyncHandler(fasync.NewVFS2(int(fd))).(*fasync.FileAsync) + return 0, nil, a.SetSignal(linux.Signal(args[2].Int())) default: // Everything else is not yet supported. return 0, nil, syserror.EINVAL @@ -241,7 +251,7 @@ func getAsyncOwner(t *kernel.Task, fd *vfs.FileDescription) (ownerEx linux.FOwne } } -func setAsyncOwner(t *kernel.Task, fd *vfs.FileDescription, ownerType, pid int32) error { +func setAsyncOwner(t *kernel.Task, fd int, file *vfs.FileDescription, ownerType, pid int32) error { switch ownerType { case linux.F_OWNER_TID, linux.F_OWNER_PID, linux.F_OWNER_PGRP: // Acceptable type. @@ -249,7 +259,7 @@ func setAsyncOwner(t *kernel.Task, fd *vfs.FileDescription, ownerType, pid int32 return syserror.EINVAL } - a := fd.SetAsyncHandler(fasync.NewVFS2).(*fasync.FileAsync) + a := file.SetAsyncHandler(fasync.NewVFS2(fd)).(*fasync.FileAsync) if pid == 0 { a.ClearOwner() return nil |