idpf_add_flow_steer(9)

💖 idpf_add_flow_steer — the Kernel API Manual moment 🎀

Okay bestie, so this one is a kernel API manual page (the 9 section, iykyk — that's the kernel devs' turf ✨) and it's literally all about one little function that adds a Flow Steering filter. Like, it's the "let me put this packet flow exactly where I want it" function 💅

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✨ NAME ✨

idpf_add_flow_steer — add a Flow Steering filter 🦋

So simple, so iconic. It adds a filter. That's the whole vibe. Periodt.

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🌸 SYNOPSIS 🌸

int idpf_add_flow_steer (struct net_device *netdev , struct
ethtool_rxnfc *cmd );

There she is 😭 — returns an int, takes a struct net_device * and a struct ethtool_rxnfc *. Copy it exactly like this if you're writing it out, bestie, no creative edits, I'm begging 🫶

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💜 ARGUMENTS 💜

• netdev — the network interface device structure 🫶 like, the actual netdev you're working with. This is giving main character energy because everything flows through it.
• cmd — the command to add the Flow Steering filter 👑 this is the actual instruction you're handing over.

Two args, both carrying their weight. We love a lean signature ✨

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⭐ RETURN ⭐

0 on success — slay 💅 — and negative values for failure 😭 so always check your return value, no cap. Negative means something went wrong, don't just ignore it and act surprised later.

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🦋 SEE ALSO 🦋

First up, the kernel file this lives in:

• Kernel file ./drivers/net/ethernet/intel/idpf/idpf_ethtool.c

Then the whole friend group — and yes, we're listing every single one, because the original lists every single one and I am not about to do them dirty 🙈

Flow steering besties:

• idpf_get_rx_ring_count(9)
• idpf_get_rxnfc(9)
• idpf_del_flow_steer(9)

RSS / hash function crew:

• idpf_get_rxfh_key_size(9)
• idpf_get_rxfh_indir_size(9)
• idpf_get_rxfh(9)
• idpf_set_rxfh(9)

Channels & ringparam girlies:

• idpf_get_channels(9)
• idpf_set_channels(9)
• idpf_get_ringparam(9)
• idpf_set_ringparam(9)

Stats squad:

• struct idpf_stats(9)
• __idpf_add_qstat_strings(9)
• idpf_add_qstat_strings(9)
• idpf_add_stat_strings(9)
• idpf_get_stat_strings(9)
• idpf_get_strings(9)
• idpf_get_sset_count(9)
• idpf_add_one_ethtool_stat(9)
• idpf_add_queue_stats(9)
• idpf_add_empty_queue_stats(9)
• idpf_add_port_stats(9)
• idpf_collect_queue_stats(9)
• idpf_get_ethtool_stats(9)

Queue vector finders:

• idpf_find_rxq_vec(9)
• idpf_find_txq_vec(9)

Coalesce cuties:

• __idpf_get_q_coalesce(9)
• idpf_get_q_coalesce(9)
• idpf_get_coalesce(9)
• idpf_get_per_q_coalesce(9)
• __idpf_set_q_coalesce(9)
• idpf_set_q_coalesce(9)
• idpf_set_coalesce(9)
• idpf_set_per_q_coalesce(9)

Msglevel minis:

• idpf_get_msglevel(9)
• idpf_set_msglevel(9)

Link & timestamp icons:

• idpf_get_link_ksettings(9)
• idpf_get_timestamp_filters(9)
• idpf_get_ts_info(9)
• idpf_get_ts_stats(9)

And the final boss:

• idpf_set_ethtool_ops(9)

Yeah. That's the whole list. All of them. Every last one. Obsessed with how thorough that is honestly 🔥

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💀 Little reminder: all those (9) bits and the file path are literal — keep them exactly as written if you're copying any of this. No fixing, no renaming, no merging. The facts stay the facts, we're just here for the vibe check.

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🎀 cute sign-off 🎀

This iconic little page lives in ./drivers/net/ethernet/intel/idpf and is dated October 2026, and it's page idpf_add_flow_steer(9) of the Kernel API Manual — so like, if you cite it, that's the receipt bestie 🧚💖 Go add that filter. You got this. 🌈⭐