genl_set_err(9)

💖 genl_set_err(9) 💖

okay bestie, welcome to the genl_set_err(9) page from the Kernel API Manual — yes, we are doing genetlink error-reporting lore and we are doing it cute. 💅✨

✨ NAME ✨

genl_set_err — report error to genetlink broadcast listeners 🫶

🎀 SYNOPSIS 🎀

int genl_set_err (const struct genl_family *family , struct net *net ,
       u32 portid , u32 group , int code );

💅 ARGUMENTS 💅

• family — the generic netlink family, aka the main character here. 👑
• net — the network namespace to report the error to. 🌐
• portid — the PORTID of a process that we want to skip (if any). 🙈
• group — the broadcast group that will notice the error; this is the offset of the multicast group in the groups array. 📣
• code — error code, and it must be negative (as usual in kernelspace). no cap, negative only. 💀

🦋 DESCRIPTION 🦋

This function returns the number of broadcast listeners that have set the NETLINK_RECV_NO_ENOBUFS socket option. literally that's the whole vibe check here. ✨

bestie, keep code negative — that's not a suggestion, that's the rule. 🚨

🌈 SEE ALSO 🌈

Kernel file ./include/net/genetlink.h is the hangout spot, and these are all the friends linked from this page:

• struct genl_multicast_group(9)
• struct genl_family(9)
• struct genl_info(9)
• struct genl_small_ops(9)
• struct genl_ops(9)
• struct genl_split_ops(9)
• struct genl_dumpit_info(9)
• genl_info_init_ntf(9)
• genlmsg_iput(9)
• genlmsg_nlhdr(9)
• genlmsg_parse_deprecated(9)
• genlmsg_parse(9)
• genl_dump_check_consistent(9)
• genlmsg_put_reply(9)
• genlmsg_end(9)
• genlmsg_cancel(9)
• genlmsg_multicast_netns_filtered(9)
• genlmsg_multicast_netns(9)
• genlmsg_multicast(9)
• genlmsg_multicast_allns(9)
• genlmsg_unicast(9)
• genlmsg_reply(9)
• genlmsg_data(9)
• genlmsg_len(9)
• genlmsg_msg_size(9)
• genlmsg_total_size(9)
• genlmsg_new(9)

xoxo, this page came from ./include/net, dated October 2026, and it's serving genl_set_err(9) energy all the way to the end. 🎀💖