STRUCT KERNEL_ETHTOOL_TS_INFO(9)

🌸 struct kernel_ethtool_ts_info(9) 🌸

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for struct kernel_ethtool_ts_info, which is literally just the kernel's own little copy of struct ethtool_ts_info. no cap. it's giving "same energy, different address space" 💅

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🎀 NAME 🎀

struct kernel_ethtool_ts_info — kernel copy of struct ethtool_ts_info

like. it's the kernel-side version of that struct. that's the whole vibe 🦋

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✨ SYNOPSIS ✨

struct kernel_ethtool_ts_info {
    u32 cmd;
    u32 so_timestamping;
    int phc_index;
    enum hwtstamp_provider_qualifier phc_qualifier;
    enum hwtstamp_source phc_source;
    int phc_phyindex;
    u32 tx_types;
    u32 rx_filters;
};

that's the whole struct, laid out, iconic, no crumbs 🍓

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💖 Members 💖

okay bestie, field by field, let's go 🔥

• cmd — the command number, and it is literally ETHTOOL_GET_TS_INFO. that's it. that's the field 👑
• so_timestamping — a bit mask of the sum of the supported SO_TIMESTAMPING flags. yes, the sum. as a bit mask. slay 🌈
• phc_index — device index of the associated PHC, or -1 if there is none. so if you see -1, that's the "no PHC bestie" signal 😭
• phc_qualifier — qualifier of the associated PHC. type is enum hwtstamp_provider_qualifier. it's the qualifier. very demure, very mindful 💜
• phc_source — source device of the associated PHC. type is enum hwtstamp_source ✨
• phc_phyindex — index of the PHY device source of the associated PHC. not to be confused with phc_index up there, they are two different fields, i don't make the rules 🫶
• tx_types — a bit mask of the supported hwtstamp_tx_types enumeration values 🎀
• rx_filters — a bit mask of the supported hwtstamp_rx_filters enumeration values 🦋

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👀 SEE ALSO 👀

the main character reference: Kernel file ./include/linux/ethtool.h 💅

and now the group chat — every single one of these showed up to the party, and we are NOT leaving anyone out:

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_add_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 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)

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🫶 friendly reminder bestie: phc_index being -1 means there's no associated PHC. don't panic, it's not a bug, it's just the documented value. periodt.

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and that's the page!! 💖 brought to you by the fine folks in ./include/linux (that's the source, mwah 💋), dated October 2026 ⭐ — go read the other ethtool pages, they're all in the group chat above, ily, bye 🧚