skb_mpls_pop(9)

🎀 NAME 🎀

okay so this is the Kernel API Manual page for skb_mpls_pop, and it does exactly what the name says, bestie: pop the outermost MPLS header. iconic behavior, no notes. ✨

✨ SYNOPSIS ✨

int skb_mpls_pop (struct sk_buff *skb , __be16 next_proto , int mac_len
, bool ethernet );

💅 ARGUMENTS 💅

• skb — the buffer. that's the packet hangout spot 💖
• next_proto — the ethertype of the header after the popped MPLS header. so, what's left underneath, iykyk.
• mac_len — the length of the MAC header. gotta know the math. 🎀
• ethernet — a flag to indicate if the packet is ethernet. yes ma'am, just a flag doing flag things. 🦋

🌸 DESCRIPTION 🌸

Expects skb->data at mac header. that's the vibe check, bestie — it wants skb->data sitting right at the mac header.

Returns 0 on success, and -errno otherwise. so a cute little 0 means slay, and anything else is the error-code girlie telling the story. 😭

🦋 SEE ALSO 🦋

Kernel file ./net/core/skbuff.c is the home base, and here's the whole linked-up crew — every single one, fr fr:

• drop_reasons_register_subsys(9), drop_reasons_unregister_subsys(9), skb_panic(9), napi_skb_cache_get_bulk(9), __build_skb(9), build_skb_around(9), __napi_build_skb(9), napi_build_skb(9), __alloc_skb(9), __netdev_alloc_skb(9)
• napi_alloc_skb(9), skb_pp_cow_data(9), skb_pp_frag_ref(9), __kfree_skb(9), sk_skb_reason_drop(9), skb_tx_error(9), consume_skb(9), __consume_stateless_skb(9), napi_consume_skb(9), alloc_skb_for_msg(9)
• skb_morph(9), skb_copy_ubufs(9), skb_clone(9), skb_copy(9), __pskb_copy_fclone(9), pskb_expand_head(9), skb_expand_head(9), skb_copy_expand(9), __skb_pad(9), pskb_put(9)
• skb_put(9), skb_push(9), skb_pull(9), skb_pull_data(9), skb_trim(9), __pskb_pull_tail(9), skb_copy_bits(9), skb_store_bits(9), skb_zerocopy(9), skb_dequeue(9)
• skb_dequeue_tail(9), skb_queue_purge_reason(9), skb_rbtree_purge(9), skb_queue_head(9), skb_queue_tail(9), skb_unlink(9), skb_append(9), skb_split(9), skb_shift(9), skb_prepare_seq_read(9)
• skb_seq_read(9), skb_abort_seq_read(9), skb_copy_seq_read(9), skb_find_text(9), skb_pull_rcsum(9), skb_segment(9), skb_to_sgvec(9), skb_cow_data(9), skb_clone_sk(9), skb_partial_csum_set(9)
• skb_checksum_setup(9), skb_checksum_maybe_trim(9), skb_checksum_trimmed(9), skb_try_coalesce(9), skb_scrub_packet(9), skb_eth_pop(9), skb_eth_push(9), skb_mpls_push(9), skb_mpls_update_lse(9), skb_mpls_dec_ttl(9)
• alloc_skb_with_frags(9), skb_condense(9), __skb_ext_alloc(9), __skb_ext_set(9), skb_ext_add(9), skb_attempt_defer_free(9), skb_splice_from_iter(9)

that's the whole page, bestie — source/version: ./net/core, date: October 2026. mwah 💋🎀✨