skb_copy_seq_read(9)

💅 skb_copy_seq_read(9) 💅

okay so bestie, you found the Kernel API Manual entry for skb_copy_seq_read(9) and honestly? It’s giving “tiny helper, very specific job” energy. Let’s get into it. 🫶

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💖 NAME 💖

skb_copy_seq_read — copy from a skb_seq_state to a buffer. periodt. 💫

✨ SYNOPSIS ✨

int skb_copy_seq_read (struct skb_seq_state *st , int offset , void *to , int len );

🎀 ARGUMENTS 🎀

• st — source skb_seq_state. like, this is where the bytes are coming from, bestie. 💖
• offset — offset in source. yes, the starting point inside st. 📍
• to — destination buffer. this is where the copied bytes go. 🎯
• len — number of bytes to copy. the exact amount, no more no less. 🔢

🦋 DESCRIPTION 🦋

okay so the actual job: copy len bytes starting at offset bytes in the source st into the destination buffer to. 💌

The vibe rule: offset should increase (or be unchanged) with each subsequent call to this function. 📈

🚨 if offset needs to decrease from the previous use, st should be reset first. no cap. that’s not optional, bestie. 🙈

🌸 RETURN 🌸

• 0 on success. slay. ✅
• -EINVAL if the copy ended early. 😭 that’s the error vibe.

🌈 SEE ALSO 🌈

the group chat is huge, and these are all the linked besties. Kernel file first, then the whole function list — no skips, no omissions, iykyk: 👑

• Kernel file ./net/core/skbuff.c
• 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_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_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)

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mwah 💋 this cutie is from source/version ./net/core, dated October 2026. bye bestie, go copy those bytes responsibly. 🫶✨