skb_mpls_update_lse(9)

💖 NAME 💖

okay so this is the skb_mpls_update_lse(9) page from the Kernel API Manual, and it's literally about skb_mpls_update_lse — modify outermost MPLS header and update csum. periodt ✨

✨ SYNOPSIS ✨

int skb_mpls_update_lse (struct sk_buff *skb , __be32 mpls_lse );

🎀 ARGUMENTS 🎀

• skb — the buffer 💅
• mpls_lse — the new MPLS label stack entry to update to ✨

🦋 DESCRIPTION 🦋

ngl, this one has main character energy but a tiny job: it expects skb->data at the mac header. no cap. Then it returns 0 on success, -errno otherwise. that's the whole vibe check 🦋

🔥 SEE ALSO 🔥

Kernel file ./net/core/skbuff.c is the home base, and the whole squad is:

• 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_pop(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)

kisses bestie 💖 this page's source/version is ./net/core, dated October 2026, and the manual page is literally skb_mpls_update_lse(9). slay 💅