i40e_add_one_ethtool_stat(9)

💅 i40e_add_one_ethtool_stat — kernel API manual, but make it make sense

okay so bestie, we're in the <purple>i40e</purple> driver, the Intel ethernet one, and this little function is genuinely the MVP of stat-copying. it takes one stat and puts it in a buffer. that's it. that's the whole gig. and honestly? iconic. 🎀

---

✨ SYNOPSIS ✨

void i40e_add_one_ethtool_stat (u64 *data , void *pointer , const struct
i40e_stats *stat );

like, look at her. three args, returns nothing, gets straight to business. no notes. 💅

---

🌸 ARGUMENTS 🌸

• data — the spot where the stat value gets stored, bestie. this is where the good stuff lands. 🫶
• pointer — the basis for where we copy from. yes, "basis for where to copy from" is literally the phrasing, and yes it's a little mysterious, but it is what it is.
• stat — the stat definition itself. the blueprint. the whole personality. 💜

---

🦋 DESCRIPTION 🦋

so what she does is: she copies the stat data — the stuff defined by the <hotpink>pointer</hotpink> + <hotpink>stat</hotpink> structure pair — into the memory you handed over as data. lowkey simple, highkey important. ✨

she's the workhorse behind i40e_add_ethtool_stats and i40e_add_queue_stats, fr fr. those two couldn't do their thing without her.

⚠️ and here's the vibe check you must remember: if the pointer is null, data will be zero'd. not skipped, not ignored — zero'd. so don't come crying later. 😭

---

👑 SEE ALSO 👑

okay this list is long long. like, genuinely. but every single one of these is a real reference and we are not leaving a single one behind — slay. 🔥

first up, the file itself and the struct:

• Kernel file ./drivers/net/ethernet/intel/i40e/i40e_ethtool.c
• struct i40e_stats(9)

and then the whole extended friend group:

• __i40e_add_ethtool_stats(9)
• i40e_add_ethtool_stats(9)
• i40e_add_queue_stats(9)
• __i40e_add_stat_strings(9)
• i40e_add_stat_strings(9)
• i40e_partition_setting_complaint(9)
• i40e_phy_type_to_ethtool(9)
• i40e_get_settings_link_up_fec(9)
• i40e_get_settings_link_up(9)
• i40e_get_settings_link_down(9)
• i40e_get_link_ksettings(9)
• i40e_speed_to_link_speed(9)
• i40e_set_link_ksettings(9)
• i40e_get_pauseparam(9)
• i40e_set_pauseparam(9)
• i40e_get_stats_count(9)
• i40e_get_veb_tc_stats(9)
• i40e_get_pfc_stats(9)
• i40e_get_ethtool_stats(9)
• i40e_get_stat_strings(9)
• i40e_set_wol(9)
• __i40e_get_coalesce(9)
• i40e_get_coalesce(9)
• i40e_get_per_queue_coalesce(9)
• i40e_set_itr_per_queue(9)
• __i40e_set_coalesce(9)
• i40e_set_coalesce(9)
• i40e_set_per_queue_coalesce(9)
• i40e_check_mask(9)
• i40e_parse_rx_flow_user_data(9)
• i40e_fill_rx_flow_user_data(9)
• i40e_get_ethtool_fdir_all(9)
• i40e_get_ethtool_fdir_entry(9)
• i40e_get_rx_ring_count(9)
• i40e_get_rxnfc(9)
• i40e_get_rss_hash_bits(9)
• i40e_update_ethtool_fdir_entry(9)
• i40e_prune_flex_pit_list(9)
• i40e_del_fdir_entry(9)
• i40e_unused_pit_index(9)
• i40e_find_flex_offset(9)
• i40e_add_flex_offset(9)
• __i40e_reprogram_flex_pit(9)
• i40e_reprogram_flex_pit(9)
• i40e_flow_str(9)
• i40e_pit_index_to_mask(9)
• i40e_print_input_set(9)
• i40e_check_fdir_input_set(9)
• i40e_match_fdir_filter(9)
• i40e_disallow_matching_filters(9)
• i40e_add_fdir_ethtool(9)
• i40e_set_rxnfc(9)
• i40e_max_channels(9)
• i40e_get_channels(9)
• i40e_set_channels(9)
• i40e_get_rxfh_key_size(9)
• i40e_get_rxfh_indir_size(9)
• i40e_get_rxfh(9)
• i40e_set_rxfh(9)
• i40e_get_priv_flags(9)
• i40e_set_priv_flags(9)
• i40e_get_module_info(9)
• i40e_get_module_eeprom(9)

like I said. the whole group chat. 🫶

---

that's the page, bestie — go copy some stats and remember the null-pointer zero'ing. mwah. 💖

this lil drop comes to you from ./drivers/net/ethernet/intel/i40e, dated October 2026 — periodt. 🌈⭐