STRUCT NFT_EXPR_TYPE(9)

🎀 NAME 🎀

okay so this is the Kernel API Manual page for struct nft_expr_type(9), and it's literally the nf_tables expression type — the blueprint vibe for expression types, iykyk. 🦋

✨ SYNOPSIS ✨

Here's the whole struct, bestie — every field exactly as it appears:

       struct nft_expr_type {
           const struct nft_expr_ops       *(*select_ops)(const struct nft_ctx
       *, const struct nlattr * const tb[]);
           void (*release_ops)(const struct nft_expr_ops *ops);
           const struct nft_expr_ops       *ops;
           const struct nft_expr_ops       *inner_ops;
           struct list_head                list;
           const char                      *name;
           struct module                   *owner;
           const struct nla_policy         *policy;
           unsigned int                    maxattr;
           u8 family;
           u8 flags;
        };

💅 Members 💅

Now the member-by-member rundown, no skips, periodt:

• select_ops — function to select nft_expr_ops 🎯
• release_ops — release nft_expr_ops
• ops — default ops, used when no select_ops function is present
• inner_ops — inner ops, used for inner packet operation
• list — used internally
• name — Identifier
• owner — module reference
• policy — netlink attribute policy
• maxattr — highest netlink attribute number
• family — address family for AF-specific types
• flags — expression type flags

🔥 SEE ALSO 🔥

Kernel file ./include/net/netfilter/nf_tables.h — go read it, bestie. And the whole crew:

• struct nft_verdict(9)
• struct nft_regs(9)
• struct nft_ctx(9)
• struct nft_userdata(9)
• struct nft_set_elem(9)
• enum nft_iter_type(9)
• struct nft_set_desc(9)
• enum nft_set_class(9)
• struct nft_set_estimate(9)
• struct nft_expr(9)
• struct nft_set_ops(9)
• struct nft_set_type(9)
• struct nft_set(9)
• struct nft_set_binding(9)
• enum nft_set_extensions(9)
• struct nft_set_ext_type(9)
• struct nft_set_ext_tmpl(9)
• struct nft_set_ext(9)
• struct nft_expr_ops(9)
• struct nft_rule(9)
• struct nft_chain_validate_state(9)
• struct nft_chain(9)
• struct nft_chain_type(9)
• struct nft_base_chain(9)
• struct nft_table(9)
• struct nft_object_hash_key(9)
• struct nft_object(9)
• struct nft_object_type(9)
• struct nft_object_ops(9)
• struct nft_flowtable(9)
• struct nft_traceinfo(9)
• struct nft_trans(9)
• struct nft_trans_hook(9)
• struct nft_trans_binding(9)

That's the whole page, bestie. Source/version vibes: ./include/net/netfilter; date: October 2026 — struct nft_expr_type(9) out. 💅✨