vlan_features_check(9)

💖 NAME 💖

okay so bestie, meet vlan_features_check(9) from the Kernel API Manual — the function whose whole thing is to drop unsafe features for skb with multiple tags. It's giving "filtering girlie with a clipboard," and honestly? we love her. ✨

🦋 SYNOPSIS 🦋

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

🎀 ARGUMENTS 🎀

• skb — the skbuff to query. that's the skbuff you're asking about. 🫶
• features — the features to be checked. the feature list on deck. ⭐

💅 RETURN 💅

You get back features without unsafe ones if the skb has multiple tags. That's the condition, bestie: multiple tags on the skb? unsafe features get dropped from the return. no cap. 💀

🌈 SEE ALSO 🌈

Kernel file ./include/linux/if_vlan.h is the home base, and the whole friend group is:

• 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_copy_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)
• compare_vlan_header(9)

source/version vibes: ./include/linux · date: October 2026 · page: vlan_features_check(9) 🫶✨