STRUCT ETHTOOL_GET_FEATURES_BLOCK(9)

💅 struct ethtool_get_features_block(9) — Kernel API Manual ✨

okay bestie, welcome to the glow-up doc for struct ethtool_get_features_block(9), straight out of the Kernel API Manual 🎀 this is the little block that's literally carrying the state of 32 features and honestly? it's giving organized. no cap.

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🌸 NAME 🌸

struct ethtool_get_features_block — the block that holds the state of 32 features 💖

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✨ SYNOPSIS ✨

struct ethtool_get_features_block {
    __u32 available;
    __u32 requested;
    __u32 active;
    __u32 never_changed;
};

four __u32s. four vibes. one struct. periodt 🫶

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👑 Members 👑

• available — the mask of changeable features ✨ like, these are the ones that can be flipped, bestie.
• requested — the mask of features requested to be enabled if possible 🙈 key phrase: if possible. it's the wishlist, not the receipt.
• active — the mask of currently enabled features 🔥 the ones actually out there living their main character energy right now.
• never_changed — the mask of features that are not changeable for any device 💀 like at all. ever. for anyone. do not try it.

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🌈 SEE ALSO 🌈

so this is the part where the manpage just absolutely dumps the whole extended friend group on you 😭 and we're listing every single one, because nobody gets left out:

• the kernel file ./include/uapi/linux/ethtool.h 📁
• struct ethtool_cmd(9)
• struct ethtool_drvinfo(9)
• struct ethtool_wolinfo(9)
• struct ethtool_regs(9)
• struct ethtool_eeprom(9)
• struct ethtool_eee(9)
• struct ethtool_modinfo(9)
• struct ethtool_coalesce(9)
• struct ethtool_ringparam(9)
• struct ethtool_channels(9)
• struct ethtool_pauseparam(9)
• enum ethtool_stringset(9)
• enum ethtool_mac_stats_src(9)
• enum ethtool_module_power_mode_policy(9)
• enum ethtool_module_power_mode(9)
• enum ethtool_c33_pse_ext_state(9)
• enum ethtool_c33_pse_ext_substate_mr_mps_valid(9)
• enum ethtool_c33_pse_ext_substate_error_condition(9)
• enum ethtool_c33_pse_ext_substate_mr_pse_enable(9)
• enum ethtool_c33_pse_ext_substate_option_detect_ted(9)
• enum ethtool_c33_pse_ext_substate_option_vport_lim(9)
• enum ethtool_c33_pse_ext_substate_ovld_detected(9)
• enum ethtool_c33_pse_ext_substate_power_not_available(9)
• enum ethtool_c33_pse_ext_substate_short_detected(9)
• enum ethtool_pse_types(9)
• enum ethtool_c33_pse_admin_state(9)
• enum ethtool_c33_pse_pw_d_status(9)
• enum ethtool_podl_pse_admin_state(9)
• enum ethtool_podl_pse_pw_d_status(9)
• enum ethtool_mm_verify_status(9)
• enum ethtool_module_fw_flash_status(9)
• struct ethtool_gstrings(9)
• struct ethtool_sset_info(9)
• enum ethtool_test_flags(9)
• struct ethtool_test(9)
• struct ethtool_stats(9)
• struct ethtool_perm_addr(9)
• struct ethtool_tcpip4_spec(9)
• struct ethtool_ah_espip4_spec(9)
• struct ethtool_usrip4_spec(9)
• struct ethtool_tcpip6_spec(9)
• struct ethtool_ah_espip6_spec(9)
• struct ethtool_usrip6_spec(9)
• struct ethtool_flow_ext(9)
• struct ethtool_rx_flow_spec(9)
• struct ethtool_rxnfc(9)
• struct ethtool_rxfh_indir(9)
• struct ethtool_rxfh(9)
• struct ethtool_rx_ntuple_flow_spec(9)
• struct ethtool_rx_ntuple(9)
• struct ethtool_dump(9)
• struct ethtool_gfeatures(9)
• struct ethtool_set_features_block(9)
• struct ethtool_sfeatures(9)
• struct ethtool_ts_info(9)
• struct ethtool_per_queue_op(9)
• struct ethtool_fecparam(9)
• enum ethtool_fec_config_bits(9)
• struct ethtool_link_settings(9)
• enum phy_upstream(9)

like… that's the whole group chat 🫶 iykyk.

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ngl bestie, never_changed is dead serious — if a bit lives in that mask it is not flipping for you, not for your NIC, not for anybody 🚫💅

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okay that's the whole page, mwah 💋 this icon was brought to you by ./include/uapi/linux, dated October 2026, and it signs off as struct ethtool_get_features_block(9) — bestie certified, no cap 📖✨🎀