tcf_exts_exec(9)

✨ NAME ✨

tcf_exts_exec — execute tc filter extensions 💅

Okay bestie, this is tcf_exts_exec(9) from the Kernel API Manual, and it's lowkey the little executor for tc filter extensions. No cap.

✨ SYNOPSIS ✨

int tcf_exts_exec (struct sk_buff *skb , struct tcf_exts *exts , struct
tcf_result *res );

🌸 ARGUMENTS 🌸

• skb — socket buffer. that's the packet vibe.
• exts — tc filter extensions handle. your extensions go here.
• res — desired result. what you're hoping comes out.

🦋 DESCRIPTION 🦋

Okay so tcf_exts_exec executes all configured extensions. literally all of them, bestie.

It returns TC_ACT_OK on a normal execution, a negative number if the filter must be considered unmatched, or a positive action code (TC_ACT_*) which must be returned to the underlying layer. that last bit is important — don't swallow it, return it upward. periodt.

no cap: the return value is giving "here's what happens next," so pay attention to the sign and the action code.

👑 SEE ALSO 👑

• Kernel file ./include/net/pkt_cls.h
• tcf_exts_has_actions(9)
• struct tcf_pkt_info(9)
• struct tcf_ematch(9)
• struct tcf_ematch_tree(9)
• struct tcf_ematch_ops(9)
• tcf_em_tree_match(9)

made with 💖 in ./include/net, October 2026 — tcf_exts_exec(9) says slay and read the refs 🫶