__vlan_hwaccel_copy_tag(9)

🌸 __vlan_hwaccel_copy_tag (9) — from the Kernel API Manual, bestie 💅

Okay so picture this: you got two skbs and one of them has hardware-accelerated VLAN info and the other one… doesn't. Tragic. This little function is the fix. It literally copies that hardware accelerated VLAN info from another skb. Iconic behavior, no notes. 🎀

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✨ NAME ✨

__vlan_hwaccel_copy_tag — copy hardware accelerated VLAN info from another skb

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🦋 SYNOPSIS 🦋

void __vlan_hwaccel_copy_tag (struct sk_buff *dst , const struct sk_buff *src );

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💖 ARGUMENTS 💖

• dst — the skbuff you're copying to, aka the glow-up recipient ✨
• src — the skbuff you're copying from, aka the one with the goods 🫶

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🌈 DESCRIPTION 🌈

It copies the VLAN information from src into dst. That's the whole vibe. And the reason it exists as its own little function? For branchless code, bestie — no cap, that's literally the stated purpose. 🌟

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👑 SEE ALSO 👑

If you're obsessed (and you should be), go read the kernel file ./include/linux/if_vlan.h and then go feral on these:

• struct vlan_ethhdr(9)
• struct vlan_pcpu_stats(9)
• struct vlan_priority_tci_mapping(9)
• struct vlan_dev_priv(9)
• eth_type_vlan(9)
• __vlan_insert_inner_tag(9)
• __vlan_insert_tag(9)
• vlan_insert_inner_tag(9)
• vlan_insert_tag(9)
• vlan_insert_tag_set_proto(9)
• __vlan_hwaccel_clear_tag(9)
• __vlan_hwaccel_put_tag(9)
• __vlan_get_tag(9)
• __vlan_hwaccel_get_tag(9)
• vlan_get_tag(9)
• vlan_get_protocol_offset_inline(9)
• vlan_get_protocol(9)
• vlan_remove_tag(9)
• skb_vlan_tagged(9)
• skb_vlan_tagged_multi(9)
• vlan_features_check(9)
• compare_vlan_header(9)

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fr fr, that's a whole reading list — but iykyk, every single one of them eats 💅🔥

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And that's the page, bestie!! 🧚 This one lives in ./include/linux and it's dated October 2026 💜 — go forth and copy those tags, you absolute main character. ⭐🍓