skb_mac_gso_segment(9)

💅 skb_mac_gso_segment(9) 💅

okay so bestie, we're diving into the Kernel API Manual today — yes, that one — and the star of the show is skb_mac_gso_segment. it's the mac layer segmentation handler, and it's giving very much "i handle the plumbing so you don't have to" energy. let's get into it 🫶

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✨ NAME ✨

skb_mac_gso_segment — the mac layer segmentation handler, periodt. that's the whole vibe. it segments stuff at the mac layer and it does it iconically 💅

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🌸 SYNOPSIS 🌸

struct sk_buff * skb_mac_gso_segment (struct sk_buff *skb ,
netdev_features_t features );

like. look at that signature. struct sk_buff * going in, struct sk_buff * coming out, and a netdev_features_t riding along in the middle. main character function fr fr 🔥

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🎀 ARGUMENTS 🎀

• skb — the buffer to segment. this is the actual thing being chopped up, no cap. it's the whole reason we're here 💖
• features — the features for the output path (see dev->features). yes, that dev->features. go look at it, iykyk 👀

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🦋 SEE ALSO 🦋

bestie, the lore goes deep. check the kernel file ./net/core/gso.c and then go meet the whole friend group:

• skb_eth_gso_segment(9)
• __skb_gso_segment(9)
• skb_gso_transport_seglen(9)
• skb_gso_network_seglen(9)
• skb_gso_mac_seglen(9)
• skb_gso_size_check(9)
• skb_gso_validate_network_len(9)
• skb_gso_validate_mac_len(9)

that's the entire squad and honestly? every single one of them ate 🌈⭐

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ngl, this page is short and sweet, but don't let the length fool you — the seg functions are a whole ecosystem and you will be seeing them again 💀

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and that's a wrap, bestie 🎀 this lil page lives in ./net/core, dated October 2026, and it's filed under skb_mac_gso_segment(9) — mwah, slay, go segment some buffers 💜🦋