On 05/01, Breno Leitao wrote: > Convert AF_NETLINK's getsockopt implementation to use the new > getsockopt_iter callback with sockopt_t. > > Key changes: > - Replace (char __user *optval, int __user *optlen) with sockopt_t *opt > - Use opt->optlen for buffer length (input) and returned size (output) > - Use copy_to_iter() instead of put_user()/copy_to_user() > - For NETLINK_LIST_MEMBERSHIPS: walk the groups bitmap and emit each > u32 sequentially via copy_to_iter(), then set opt->optlen to the > total size required (ALIGN(BITS_TO_BYTES(ngroups), sizeof(u32))). > The wrapper writes opt->optlen back to userspace even on partial > failure, preserving the existing API that lets userspace discover > the needed allocation size. > > Signed-off-by: Breno Leitao <[email protected]>
Acked-by: Stanislav Fomichev <[email protected]>
