iavf_cleanup_headers(9)

💖 iavf_cleanup_headers(9) — the kernel API manual bestie 💖

okay so this is the iavf_cleanup_headers(9) page from the Kernel API Manual, and it's literally about fixing up empty headers and padding baby packets so they're valid Ethernet frames. no cap, it's giving "network driver main character energy" 🔥

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✨ NAME ✨

iavf_cleanup_headers — Correct empty headers

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🦋 SYNOPSIS 🦋

bool iavf_cleanup_headers(struct iavf_ring *rx_ring, struct sk_buff *skb);

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🎀 ARGUMENTS 🎀

• rx_ring — the rx descriptor ring that the packet is being transacted on, iykyk 💅
• skb — pointer to the current skb that's getting fixed up, periodt 🫶

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🌸 DESCRIPTION 🌸

so this function also handles the case where we're pulling data in on pages only, and because of that, literally no data is present in the skb header. it's giving "empty header vibes" 😭

in addition, if the skb is not at least 60 bytes, we need to pad it so it's large enough to qualify as a valid Ethernet frame. yes bestie, size matters for Ethernet frames 👑

returns true if an error was encountered and the skb was freed. lowkey important, so don't sleep on it 💀

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🌈 SEE ALSO 🌈

Kernel file: ./drivers/net/ethernet/intel/iavf/iavf_txrx.c

iavf_is_descriptor_done(9), iavf_unmap_and_free_tx_resource(9), iavf_clean_tx_ring(9), iavf_free_tx_resources(9), iavf_get_tx_pending(9), iavf_force_wb(9), iavf_detect_recover_hung(9), iavf_clean_tx_irq(9), iavf_enable_wb_on_itr(9), iavf_update_itr(9), iavf_setup_tx_descriptors(9), iavf_clean_rx_ring(9), iavf_free_rx_resources(9), iavf_setup_rx_descriptors(9), iavf_release_rx_desc(9), iavf_receive_skb(9), iavf_alloc_rx_buffers(9), iavf_rx_csum(9), iavf_legacy_rx_csum(9), iavf_flex_rx_csum(9), iavf_legacy_rx_hash(9), iavf_flex_rx_hash(9), iavf_flex_rx_tstamp(9), iavf_process_skb_fields(9), iavf_add_rx_frag(9), iavf_build_skb(9), iavf_is_non_eop(9), iavf_extract_legacy_rx_fields(9), iavf_extract_flex_rx_fields(9), iavf_clean_rx_irq(9), iavf_update_enable_itr(9), iavf_napi_poll(9), iavf_tx_prepare_vlan_flags(9), iavf_tso(9), iavf_tx_enable_csum(9), iavf_create_tx_ctx(9), __iavf_chk_linearize(9), __iavf_maybe_stop_tx(9), iavf_tx_map(9), iavf_xmit_frame_ring(9), iavf_xmit_frame(9)

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that's the whole page bestie, and yes it ate 💅💖

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