ethtool_link...dd_link_mode(9)

💅 ethtool_link...dd_link_mode(9) 🌸

okay so first things first, the name of this page is ethtool_link...dd_link_mode(9) and it lives in the Kernel API Manual — yes the title looks like it got cut off mid-sentence, no that's not a typo on my end, that's literally just how it's printed. moving on bestie 🫶

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✨ NAME ✨

ethtool_link_ksettings_add_link_mode — sets a bit in the link_ksettings link mode mask. that's it. that's the whole job. she's a one-task icon 👑

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🦋 SYNOPSIS 🦋

ethtool_link_ksettings_add_link_mode (ptr , name , mode );

literally just three little guys going in. look at them. so brave 🥹

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🎀 ARGUMENTS 🎀

• ptr — your pointer to struct ethtool_link_ksettings. yeah. that one. the big one. she's the main character here 💖
• name — must be one of supported / advertising / lp_advertising. those three, bestie, pick one. not a fourth thing, i'm begging 🙈
• mode — one of the ETHTOOL_LINK_MODE_*_BIT values. and now for the vibe check:

⚠️ not atomic, no bound checking ⚠️ like… ma'am. this is the "no seatbelt, no airbags, vibes only" of kernel functions 💀 nobody is gonna catch you if you mess this up. it's not atomic and it will NOT check your bounds. you are on your own, gorgeous. proceed with intention. 🔥

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👑 SEE ALSO 👑

the whole extended friend group, and yes i mean the whole group chat, they all live in the kernel file ./include/linux/ethtool.h:

• enum ethtool_phys_id_state(9)
• struct kernel_ethtool_ringparam(9)
• enum ethtool_supported_ring_param(9)
• ethtool_rxfh_indir_default(9)
• struct ethtool_rxfh_context(9)
• ethtool_link_ksettings_zero_link_mode(9)
• ethtool_link_ksettings_del_link_mode(9)
• ethtool_link_ksettings_test_link_mode(9)
• ethtool_intersect_link_masks(9)
• struct ethtool_phy_stats(9)
• struct ethtool_pause_stats(9)
• struct ethtool_fec_hist_range(9)
• struct ethtool_fec_stats(9)
• struct ethtool_rmon_hist_range(9)
• struct ethtool_rmon_stats(9)
• struct ethtool_ts_stats(9)
• struct ethtool_module_eeprom(9)
• struct ethtool_module_power_mode_params(9)
• struct ethtool_mm_state(9)
• struct ethtool_mm_cfg(9)
• struct ethtool_mm_stats(9)
• struct ethtool_mmsv_ops(9)
• struct ethtool_mmsv(9)
• struct ethtool_rxfh_param(9)
• struct ethtool_rxfh_fields(9)
• struct kernel_ethtool_ts_info(9)
• struct ethtool_ops(9)
• struct ethtool_netdev_state(9)
• struct ethtool_phy_ops(9)
• ethtool_set_ethtool_phy_ops(9)
• ethtool_params_from_link_mode(9)
• ethtool_get_phc_vclocks(9)
• ethtool_mm_frag_size_add_to_min(9)
• ethtool_mm_frag_size_min_to_add(9)
• ethtool_get_ts_info_by_layer(9)
• ethtool_sprintf(9)
• ethtool_puts(9)
• ethtool_cpy(9)

(this page is like the most social member of the family, she knows everyone iykyk 🌈)

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and that's the whole page!! mwah 💋

cute little sign-off for the record: this one's sourced from ./include/linux and dated October 2026 — so yes, we're reading kernel docs from the future, and honestly? slay. ⭐🎀💜