igb_ptp_rx_pktstamp(9)

💖 igb_ptp_rx_pktstamp(9) 💖

okay bestie, so we're in the Kernel API Manual today and this page is literally called igb_ptp_rx_pktstamp(9) — say that five times fast, i dare you 🫶

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✨ NAME ✨

igb_ptp_rx_pktstamp — retrieve Rx per packet timestamp 👑

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🎀 SYNOPSIS 🎀

int igb_ptp_rx_pktstamp (struct igb_q_vector *q_vector , void *va ,
       ktime_t *timestamp );

that's the whole vibe, no cap 💅

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🌸 ARGUMENTS 🌸

• q_vector — a pointer to the interrupt specific structure. yes, that one. the interrupt-specific one 🦋
• va — a pointer to the address containing the Rx buffer. it's giving "where the packet actually lives" ✨
• timestamp — a pointer to where the timestamp will be stored. drop it right there, bestie 💖

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💫 DESCRIPTION 💫

okay so here's the tea 🍓 — this function is meant to retrieve a timestamp from the first buffer of an incoming frame. that's its whole job, its main character moment, its destiny.

and here's the detail you gotta remember: the value is stored in little endian format starting on byte 8. not byte 7, not byte 9. byte 8. write it down 📝

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🌈 RETURN 🌈

it hands you back the timestamp header length, or 0 if not available 😭 (iykyk, sometimes the vibe check just does not pass)

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🔥 SEE ALSO 🔥

first up, the kernel file it lives in — go say hi:

./drivers/net/ethernet/intel/igb/igb_ptp.c

and then the whole friend group 💜✨:

• igb_ptp_systim_to_hwtstamp(9)
• igb_ptp_tx_work(9)
• igb_ptp_rx_hang(9)
• igb_ptp_tx_hang(9)
• igb_ptp_tx_hwtstamp(9)
• igb_ptp_rx_rgtstamp(9)
• igb_ptp_hwtstamp_get(9)
• igb_ptp_set_timestamp_mode(9)
• igb_ptp_hwtstamp_set(9)
• igb_ptp_init(9)
• igb_ptp_sdp_init(9)
• igb_ptp_suspend(9)
• igb_ptp_stop(9)
• igb_ptp_reset(9)

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ngl bestie, this one's short and sweet but every byte counts 💀 don't sleep on byte 8.

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and that's a wrap, babes 🧚 this iconic little page lives in ./drivers/net/ethernet/intel/igb, dated October 2026 — periodt 💅⭐