tls: convert getsockopt to sockopt_t

Continue converting the proto-layer getsockopt callbacks to the sockopt_t
interface, converting do_tls_getsockopt() and its per-option helpers to
take a sockopt_t.

The thin tls_getsockopt() wrapper keeps its __user signature for now: it
builds a user-backed sockopt_t with sockopt_init_user(), calls the helper,
and writes the returned length back to optlen. The helpers use
copy_to_iter() instead of copy_to_user(); the NULL optval check in the
TLS_TX/TLS_RX path is preserved by testing the iterator user buffer.

No functional change.

Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Joe Damato <joe@dama.to>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260729-getsockopt_phase4-v4-6-c44576757c17@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions