i40e_set_rxfh(9)

✨ i40e_set_rxfh(9) ✨

okay so bestie, welcome to the Kernel API Manual — yes we're literally in the kernel docs rn, and honestly? iconic. 🎀

This one's all about i40e_set_rxfh — the function that sets the rx flow hash indirection table. That's the whole vibe. 💅

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🌸 NAME 🌸

i40e_set_rxfh — set the rx flow hash indirection table 🦋

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⭐ SYNOPSIS ⭐

int i40e_set_rxfh (struct net_device *netdev , struct ethtool_rxfh_param
*rxfh , struct netlink_ext_ack *extack );

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💖 ARGUMENTS 💖

• netdev — the network interface device structure, aka the nic we're talking about 🩷
• rxfh — pointer to the param struct (indir, key, hfunc), this is where the actual settings live, no cap 👑
• extack — extended ACK from the Netlink message, so the kernel can talk back to userspace when something's up 🌈

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🔥 DESCRIPTION 🔥

So here's the tea ☕: this function returns -EINVAL if the table specifies an invalid queue id — like, if you hand it an indirection table pointing at a queue that doesn't exist, it's gonna ✨reject✨ you. Not me being mean, that's just the contract. 💀

Otherwise? It returns 0 after programming the table. Slayed. periodt. 💅

ngl, the -EINVAL case is the only drama here — every other path is a happy little 0 once the table's been programmed. 🫶

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🧚 SEE ALSO 🧚

Kernel file ./drivers/net/ethernet/intel/i40e/i40e_ethtool.c, plus the whole friend group of related functions — every single one, bestie, we're not skipping any 💜:

• struct i40e_stats(9)
• i40e_add_one_ethtool_stat(9)
• __i40e_add_ethtool_stats(9)
• i40e_add_ethtool_stats(9)
• i40e_add_queue_stats(9)
• __i40e_add_stat_strings(9)
• i40e_add_stat_strings(9)
• i40e_partition_setting_complaint(9)
• i40e_phy_type_to_ethtool(9)
• i40e_get_settings_link_up_fec(9)
• i40e_get_settings_link_up(9)
• i40e_get_settings_link_down(9)
• i40e_get_link_ksettings(9)
• i40e_speed_to_link_speed(9)
• i40e_set_link_ksettings(9)
• i40e_get_pauseparam(9)
• i40e_set_pauseparam(9)
• i40e_get_stats_count(9)
• i40e_get_veb_tc_stats(9)
• i40e_get_pfc_stats(9)
• i40e_get_ethtool_stats(9)
• i40e_get_stat_strings(9)
• i40e_set_wol(9)
• __i40e_get_coalesce(9)
• i40e_get_coalesce(9)
• i40e_get_per_queue_coalesce(9)
• i40e_set_itr_per_queue(9)
• __i40e_set_coalesce(9)
• i40e_set_coalesce(9)
• i40e_set_per_queue_coalesce(9)
• i40e_check_mask(9)
• i40e_parse_rx_flow_user_data(9)
• i40e_fill_rx_flow_user_data(9)
• i40e_get_ethtool_fdir_all(9)
• i40e_get_ethtool_fdir_entry(9)
• i40e_get_rx_ring_count(9)
• i40e_get_rxnfc(9)
• i40e_get_rss_hash_bits(9)
• i40e_update_ethtool_fdir_entry(9)
• i40e_prune_flex_pit_list(9)
• i40e_del_fdir_entry(9)
• i40e_unused_pit_index(9)
• i40e_find_flex_offset(9)
• i40e_add_flex_offset(9)
• __i40e_reprogram_flex_pit(9)
• i40e_reprogram_flex_pit(9)
• i40e_flow_str(9)
• i40e_pit_index_to_mask(9)
• i40e_print_input_set(9)
• i40e_check_fdir_input_set(9)
• i40e_match_fdir_filter(9)
• i40e_disallow_matching_filters(9)
• i40e_add_fdir_ethtool(9)
• i40e_set_rxnfc(9)
• i40e_max_channels(9)
• i40e_get_channels(9)
• i40e_set_channels(9)
• i40e_get_rxfh_key_size(9)
• i40e_get_rxfh_indir_size(9)
• i40e_get_rxfh(9)
• i40e_get_priv_flags(9)
• i40e_set_priv_flags(9)
• i40e_get_module_info(9)
• i40e_get_module_eeprom(9)

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🌟 and that's the page, bestie!

okay final sign-off ily 🫶 — this one lives in ./drivers/net/ethernet/intel/i40e, dated October 2026, and it's filed under i40e_set_rxfh(9) in the Kernel API Manual. go forth and program that indirection table, you absolute main character 👑💖