pskb_trim_rcsum(9)

💅 pskb_trim_rcsum (9) — Kernel API Manual ✨

okay so bestie, welcome to the glow-up doc for pskb_trim_rcsum 🎀 this one lives in the Kernel API Manual and honestly? it's a little icon. let's get into it 💖

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✨ NAME ✨

pskb_trim_rcsum — trim received skb and update checksum 💅

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🦋 SYNOPSIS 🦋

int pskb_trim_rcsum (struct sk_buff *skb , unsigned int len );

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🌸 ARGUMENTS 🌸

• skb — the buffer you're trimming, bestie. that's the one getting the haircut 💇‍♀️
• len — the new length ✨ like, how long it's gonna be after

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👑 DESCRIPTION 👑

okay so listen 🫶 this is exactly the same as pskb_trim — like, same vibes, same energy — except it also makes sure the checksum of received packets is still valid after the operation ✨ like it's not gonna let you walk out of there with a broken checksum, no cap 💅

and heads up 👀 it can change skb pointers — so don't go holding onto an old pointer like it's your main character, because it might not be anymore 😭

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🔥 SEE ALSO 🔥

the whole friend group, fr fr 💜 — and also the kernel file ./include/linux/skbuff.h 📁

skb checksums(9), skb_frag_size(9), skb_frag_size_set(9), skb_frag_size_add(9), skb_frag_size_sub(9), skb_frag_must_loop(9), skb_frag_foreach_page(9), struct skb_shared_hwtstamps(9), dataref and headerless skbs(9), Basic sk_buff geometry(9), struct sk_buff(9), skb_pfmemalloc(9), skb_dst(9), skb_dstref_steal(9), skb_dstref_restore(9), skb_dst_set(9), skb_dst_set_noref(9), skb_dst_is_noref(9), skb_napi_id(9), skb_unref(9), kfree_skb(9), alloc_skb(9), skb_fclone_busy(9), alloc_skb_fclone(9), skb_pad(9)

skb_queue_empty(9), skb_queue_empty_lockless(9), skb_queue_is_last(9), skb_queue_is_first(9), skb_queue_next(9), skb_queue_prev(9), skb_get(9), skb_cloned(9), skb_header_cloned(9), __skb_header_release(9), skb_shared(9), skb_share_check(9), skb_unshare(9), skb_peek(9), __skb_peek(9), skb_peek_next(9), skb_peek_tail(9), skb_queue_len(9), skb_queue_len_lockless(9), __skb_queue_head_init(9), skb_queue_splice(9), skb_queue_splice_init(9), skb_queue_splice_tail(9), skb_queue_splice_tail_init(9), __skb_queue_after(9), __skb_queue_head(9), __skb_queue_tail(9), __skb_dequeue(9), __skb_dequeue_tail(9), skb_len_add(9), __skb_fill_netmem_desc(9), skb_fill_page_desc(9), skb_fill_page_desc_noacc(9), skb_headroom(9), skb_tailroom(9), skb_availroom(9), skb_reserve(9), skb_tailroom_reserve(9), skb_reset_transport_header_careful(9), skb_set_transport_header_careful(9), pskb_trim_unique(9), skb_orphan(9), skb_orphan_frags(9), __skb_queue_purge_reason(9), netdev_alloc_frag(9), netdev_alloc_skb(9), __dev_alloc_pages(9), __dev_alloc_page(9), dev_page_is_reusable(9), skb_propagate_pfmemalloc(9), skb_frag_off(9), skb_frag_off_add(9), skb_frag_off_set(9), skb_frag_off_copy(9), skb_frag_net_iov(9), skb_frag_page(9), skb_frag_netmem(9), skb_frag_address(9), skb_frag_address_safe(9), skb_frag_phys(9), skb_frag_page_copy(9), __skb_frag_dma_map(9), skb_clone_writable(9), skb_cow(9), skb_cow_head(9), skb_padto(9), __skb_put_padto(9), skb_put_padto(9), skb_linearize(9), skb_has_shared_frag(9), skb_linearize_cow(9), skb_postpull_rcsum(9), skb_postpush_rcsum(9), skb_push_rcsum(9), skb_needs_linearize(9), skb_get_timestamp(9), skb_data_move(9), skb_postpull_data_move(9), skb_postpush_data_move(9), skb_complete_tx_timestamp(9), skb_tstamp_tx(9), skb_tx_timestamp(9), skb_complete_wifi_ack(9), skb_checksum_complete(9), struct skb_ext(9), skb_checksum_none_assert(9), skb_head_is_locked(9)

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and that's the whole page, bestie 🫶 this lil masterpiece comes to you from ./include/linux and it's dated October 2026 ⭐ no cap, that's the version stamp 💖 mwah, go trim something safely 💅✨