STRUCT PROG_ENTRY(9)

💖 struct prog_entry(9) 💖

okay so bestie, we're looking at struct prog_entry from the Kernel API Manual — it's literally one single entry in the filter program, and yes she is the main character of this little struct. no cap.

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✨ NAME ✨

struct prog_entry — a single entry in the filter program 🎀

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🌸 SYNOPSIS 🌸

struct prog_entry {
    int target;
    int when_to_branch;
    struct filter_pred      *pred;
 };

like. look at her. three fields. flawless. 💅

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🦋 Members 🦋

• target — the index you jump to on a branch (ngl, it's actually one minus the index — that's the whole vibe, don't come for me, that's literally what the manpage says 🫶)
• when_to_branch — the value of the result of the predicate that makes it do a branch. iykyk. ✨
• pred — the predicate to execute. that's it, that's the whole job, and she ate. 🔥

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👑 SEE ALSO 👑

lowkey obsessed with these, go read them:

• Kernel file ./kernel/trace/trace_events_filter.c update_preds(9)
• filter_parse_regex(9)
• create_filter(9)
• create_system_filter(9)

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so that's the whole page, bestie — go forth and branch correctly 💜

fr fr this one came straight out of ./kernel/trace, dated October 2026, and it's serving struct prog_entry(9) realness. mwah 🍓