Re: [PATCH 1/2] fork: extend clone3() to support CLONE_SET_TID

Dmitry Safonov
2019-07-29T19:13:07Z

On Mon, 29 Jul 2019 at 17:52, Adrian Reber <areber@redhat.com> wrote:
[..]
> --- a/include/uapi/linux/sched.h
> +++ b/include/uapi/linux/sched.h
> @@ -32,6 +32,7 @@
> #define CLONE_NEWPID 0x20000000 /* New pid namespace */
> #define CLONE_NEWNET 0x40000000 /* New network namespace */
> #define CLONE_IO 0x80000000 /* Clone io context */
> +#define CLONE_SET_TID 0x100000000ULL /* set if the desired TID is set in set_tid */
>
> /*
> * Arguments for the clone3 syscall
> @@ -45,6 +46,7 @@ struct clone_args {
> __aligned_u64 stack;
> __aligned_u64 stack_size;
> __aligned_u64 tls;
> + __aligned_u64 set_tid;
> };
>

I don't see a change to
: if (unlikely(size < sizeof(struct clone_args)))
: return -EINVAL;

That seems backwards-incompatible, but I may miss some part..

--
Dmitry