ENUM NFT_RULE_COMPAT_FLAGS(9)

💅 NAME

okay so bestie, gather round: enum nft_rule_compat_flags — this is the nf_tables rule compat flags enum, and no I will not be pronouncing the whole thing out loud. We're deep in the Kernel API Manual today, so grab a lil snack 🍓 and let's get into it.

✨ SYNOPSIS

like, here's the whole vibe, verbatim, no cap:

enum nft_rule_compat_flags {
    NFT_RULE_COMPAT_F_UNUSED ,
    NFT_RULE_COMPAT_F_INV ,
    NFT_RULE_COMPAT_F_MASK

};

that's the whole enum. three little constants, three little besties 🫶

🎀 CONSTANTS

• NFT_RULE_COMPAT_F_UNUSED — literally just... unused. it's giving placeholder energy 💀 the docs say "unused" and honestly? same.
• NFT_RULE_COMPAT_F_INV — this one inverts the check result. that's it, that's the whole lore. flip it and reverse it ✨
• NFT_RULE_COMPAT_F_MASK — bestie, the official docs literally say -- undescribed -- 😭 like the kernel documentation said "no thoughts, head empty" and moved on. I'm not gonna invent lore for you, so that's genuinely all the manpage gives us. periodt.

ngl the mask one having -- undescribed -- as its entire description is such a main character move 💅 the mystery, the intrigue, the absolute refusal to elaborate.

🌈 SEE ALSO

okay this is the part where I hold your hand, because the SEE ALSO section here is iconic in the sense that it's huge. the kernel file lives at ./include/uapi/linux/netfilter/nf_tables.h, and here's every single sibling enum the page points you at — yes, all of them, I'm not skipping a one:

enum nft_registers(9), enum nft_verdicts(9), enum nf_tables_msg_types(9), enum nft_list_attributes(9), enum nft_hook_attributes(9), enum nft_table_flags(9), enum nft_table_attributes(9), enum nft_chain_attributes(9), enum nft_rule_attributes(9), enum nft_rule_compat_attributes(9), enum nft_set_flags(9), enum nft_set_policies(9), enum nft_set_desc_attributes(9), enum nft_set_field_attributes(9), enum nft_set_attributes(9), enum nft_set_elem_flags(9), enum nft_set_elem_attributes(9), enum nft_set_elem_list_attributes(9), enum nft_data_types(9), enum nft_data_attributes(9), enum nft_verdict_attributes(9), enum nft_expr_attributes(9), enum nft_immediate_attributes(9), enum nft_bitwise_ops(9), enum nft_bitwise_attributes(9), enum nft_byteorder_ops(9), enum nft_byteorder_attributes(9), enum nft_cmp_ops(9), enum nft_cmp_attributes(9), enum nft_range_ops(9), enum nft_range_attributes(9), enum nft_lookup_attributes(9), enum nft_dynset_attributes(9), enum nft_payload_bases(9), enum nft_payload_csum_types(9), enum nft_payload_attributes(9), enum nft_exthdr_op(9), enum nft_exthdr_attributes(9), enum nft_meta_keys(9), enum nft_rt_keys(9), enum nft_hash_types(9), enum nft_hash_attributes(9), enum nft_meta_attributes(9), enum nft_rt_attributes(9), enum nft_socket_attributes(9), enum nft_ct_keys(9), enum nft_ct_attributes(9), enum nft_offload_attributes(9), enum nft_limit_attributes(9), enum nft_connlimit_attributes(9), enum nft_counter_attributes(9), enum nft_last_attributes(9), enum nft_log_attributes(9), enum nft_log_level(9), enum nft_queue_attributes(9), enum nft_quota_attributes(9), enum nft_secmark_attributes(9), enum nft_reject_types(9), enum nft_reject_inet_code(9), enum nft_reject_attributes(9), enum nft_nat_types(9), enum nft_nat_attributes(9), enum nft_tproxy_attributes(9), enum nft_masq_attributes(9), enum nft_redir_attributes(9), enum nft_dup_attributes(9), enum nft_fwd_attributes(9), enum nft_objref_attributes(9), enum nft_gen_attributes(9), enum nft_object_attributes(9), enum nft_flowtable_flags(9), enum nft_flowtable_attributes(9), enum nft_flowtable_hook_attributes(9), enum nft_osf_attributes(9), enum nft_synproxy_attributes(9), enum nft_devices_attributes(9), enum nft_trace_attributes(9), enum nft_ng_attributes(9)

like... that's the whole extended fam right there. iykyk 🔥

and that's the page bestie!! source is ./include/uapi/linux/netfilter, dated October 2026, living under the Kernel API Manual, and the page itself is enum nft_rule_compat_flags(9) — go forth and be compat-flag-pilled 💜🧚‍♀️ slay