linux

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Files

Breno Leitao 390bf43b77 netlink: convert to getsockopt_iter

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 <leitao@debian.org>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260501-getsock_one-v1-1-810ce23ea70e@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2026-05-04 19:02:30 -07:00

af_netlink.c

netlink: convert to getsockopt_iter

2026-05-04 19:02:30 -07:00

af_netlink.h

netlink: terminate outstanding dump on socket close

2024-11-07 13:45:34 -08:00

diag.c

net: change sock.sk_ino and sock_i_ino() to u64

2026-03-06 14:31:26 +01:00

genetlink.c

genetlink: apply reject policy for split ops on the dispatch path