ethtool_get_phc_vclocks(9)

okay bestie, welcome to the ethtool_get_phc_vclocks(9) page in the Kernel API Manual — it's short, but the memory note is important, fr fr 😭💅

💖 NAME 💖

ethtool_get_phc_vclocks — derives phc vclocks information, and the caller is responsible for freeing the memory of vclock_index — yes, the caller has to free that memory, no cap 🫶

✨ SYNOPSIS ✨

here's the signature, exact and untouched, bestie:

int ethtool_get_phc_vclocks (struct net_device *dev , int **vclock_index
       );

📥 ARGUMENTS 📥

vibe check on the args 💅

• dev — pointer to a net_device structure.
• vclock_index — pointer to a pointer of vclock index.

🔁 RETURN 🔁

returns the number of phc vclocks. that's the return value, periodt 🔥

👀 SEE ALSO 👀

go read these too, iykyk — the whole kernel API friend group plus the file homie:

• 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_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 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_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)

okay that's the whole page, bestie — cute sign-off: source/version ./include/linux, date October 2026, mwah 💅✨