STRUCT EFX_ARFS_RULE(9)

👑 struct efx_arfs_rule(9) — the Kernel API Manual, bestie edition 🎀

okay so picture this: you're deep in the ./drivers/net/ethernet/sfc/siena directory (yes the whole manual lives there, we stan a niche), and you open the Kernel API Manual page for struct efx_arfs_rule(9). that's what we're doing today. it's giving "the receipts for one little ARFS filter" ✨

💖 NAME 💖

struct efx_arfs_rule — literally the record of an ARFS filter and its IDs. one struct, one filter, all the bookkeeping, no cap 📒

🦋 SYNOPSIS 🦋

struct efx_arfs_rule {
    struct hlist_node node;
    struct efx_filter_spec spec;
    u16 rxq_index;
    u16 arfs_id;
    s32 filter_id;
 };

look at her. five members, flawless, zero notes 💅

🌸 Members 🌸

• node — the linkage into the hash table 🔗 she's literally the social connector.
• spec — the details of the filter, and it's also used as the key for the hash table, highkey dual-purpose main character energy. when you need to know which member to use, check efx->type — that's the vibe check that tells you what's what 👀
• rxq_index — the channel to which the filter will steer traffic. traffic direction queen 🚦
• arfs_id — the filter ID that was handed back to ARFS 🎀
• filter_id — the index in the software filter table, and bestie she has lore. she might be:
  • EFX_ARFS_FILTER_ID_PENDING — if the filter wasn't inserted yet 🙈 (we're waiting, we're patient)
  • EFX_ARFS_FILTER_ID_ERROR — if the filter insertion failed 😭
  • EFX_ARFS_FILTER_ID_REMOVING — if expiry is currently removing the filter 💀 mid-exit, don't perceive her

🔥 SEE ALSO 🔥

the whole friend group, in order, from the kernel file ./drivers/net/ethernet/sfc/siena/net_driver.h:

• struct efx_buffer(9)
• struct efx_special_buffer(9)
• struct efx_tx_buffer(9)
• struct efx_tx_queue(9)
• struct efx_rx_buffer(9)
• struct efx_rx_page_state(9)
• struct efx_rx_queue(9)
• struct efx_channel(9)
• struct efx_msi_context(9)
• struct efx_channel_type(9)
• struct efx_link_state(9)
• enum efx_phy_mode(9)
• struct efx_hw_stat_desc(9)
• struct efx_rss_context(9)
• struct efx_async_filter_insertion(9)
• struct efx_nic(9)
• struct efx_nic_type(9)

go read all seventeen of them, i'll wait 🫶 iykyk 🌈

and that's the page, bestie — delivered straight from ./drivers/net/ethernet/sfc/siena, dated October 2026, signed off with a lil struct efx_arfs_rule(9) for old times' sake. periodt. 💜