write_tag_11_packet(9)

✨ write_tag_11_packet(9) ✨

okay so bestie, we're in the Kernel API Manual, section 9 — kernel interfaces, the deep lore — and today's main character is write_tag_11_packet. literally no description in the NAME line, it's giving mystery on purpose. iconic of it honestly 🎀

🌸 SYNOPSIS 🌸

int write_tag_11_packet (char *dest , size_t *remaining_bytes , char *contents , size_t contents_length , size_t *packet_length );

💅 ARGUMENTS 💅

• dest — the target you're writing the Tag 11 packet into. the destination, the spot, the place it goes 💖
• remaining_bytes — the maximum packet length. that's your ceiling, no cap
• contents — a byte array of the contents to copy in. your actual payload, the vibes you're shipping
• contents_length — the number of bytes in contents. gotta know how much of the array actually matters fr fr
• packet_length — the length of the Tag 11 packet written out — and it's zero on error, so like, zero means it did not slay 😭

🦋 DESCRIPTION 🦋

so what does it return? simple queen behaviour: zero on success, non-zero on error. that's it. that's the whole description. no notes, immaculate ✨

ngl the original page is kinda minimal here — we're not adding extra behavioural claims that aren't in it, we're just making sure you clock that 0 = good, anything else = not good. periodt 💅

👑 SEE ALSO 👑

the whole friend group, all of them, no one left out 🫶

• Kernel file ./fs/ecryptfs/keystore.c
• ecryptfs_parse_packet_length(9)
• ecryptfs_write_packet_length(9)
• ecryptfs_verify_version(9)
• ecryptfs_verify_auth_tok_from_key(9)
• ecryptfs_find_auth_tok_for_sig(9)
• ecryptfs_parse_tag_70_packet(9)
• decrypt_pki_encrypted_session_key(9)
• parse_tag_1_packet(9)
• parse_tag_3_packet(9)
• parse_tag_11_packet(9)
• decrypt_passphrase_encrypted_session_key(9)
• ecryptfs_parse_packet_set(9)
• write_tag_1_packet(9)
• write_tag_3_packet(9)
• ecryptfs_generate_key_packet_set(9)

and that's the page!! source lives in ./fs/ecryptfs, dated October 2026 — go read the whole packet set, mwah 💜🧚‍♀️