netdev_open(9)

💖 netdev_open(9) — Kernel API Manual 💖

okay so bestie, we're in the Kernel API Manual and the main character is netdev_open(9) — the function that opens a network device. it's literally giving "turn the netdev on" energy, and we're gonna walk through it together 🫶

✨ NAME ✨

netdev_open — open network device.

📜 SYNOPSIS 📜

int netdev_open (struct net_device *dev );

🎀 ARGUMENTS 🎀

• dev — Network device.

💅 DESCRIPTION 💅

This function processes the open operation of a network device. It's caused by the user command ifconfig ethX up. no cap, that's the whole "bring the interface up" moment ✨

Return 0 if successful; otherwise an error code indicating failure. So yeah: 0 = slay, anything else = an error code telling you something went wrong 😭

🔥 SEE ALSO 🔥

Kernel file: ./drivers/net/ethernet/micrel/ksz884x.c

the whole squad of structs and functions, every single one — because we do not skip the "boring" parts in this group chat:

• struct ksz_hw_desc(9)
• struct ksz_sw_desc(9)
• struct ksz_dma_buf(9)
• struct ksz_desc(9)
• struct ksz_desc_info(9)
• struct ksz_mac_table(9)
• struct ksz_vlan_table(9)
• struct ksz_port_mib(9)
• struct ksz_port_cfg(9)
• struct ksz_switch(9)
• struct ksz_port_info(9)
• struct ksz_hw(9)
• struct ksz_port(9)
• struct ksz_timer_info(9)
• struct ksz_shared_mem(9)
• struct ksz_counter_info(9)
• struct dev_info(9)
• struct dev_priv(9)
• hw_turn_on_intr(9)
• hw_block_intr(9)
• sw_r_table(9)
• sw_w_table_64(9)
• sw_w_sta_mac_table(9)
• sw_r_vlan_table(9)
• port_r_mib_cnt(9)
• port_r_mib_pkt(9)
• port_r_cnt(9)
• port_init_cnt(9)
• port_cfg(9)
• port_r8(9)
• port_r16(9)
• port_w16(9)
• sw_chk(9)
• sw_cfg(9)
• sw_cfg_broad_storm(9)
• sw_get_broad_storm(9)
• sw_dis_broad_storm(9)
• sw_ena_broad_storm(9)
• sw_init_broad_storm(9)
• hw_cfg_broad_storm(9)
• sw_dis_prio_rate(9)
• sw_init_prio_rate(9)
• sw_dis_diffserv(9)
• sw_dis_802_1p(9)
• sw_cfg_replace_null_vid(9)
• sw_cfg_replace_vid(9)
• sw_cfg_port_based(9)
• sw_dis_multi_queue(9)
• sw_init_prio(9)
• port_get_def_vid(9)
• sw_init_vlan(9)
• sw_cfg_port_base_vlan(9)
• sw_set_addr(9)
• sw_set_global_ctrl(9)
• port_set_stp_state(9)
• sw_clr_sta_mac_table(9)
• sw_init_stp(9)
• sw_block_addr(9)
• hw_r_phy(9)
• hw_w_phy(9)
• eeprom_read(9)
• eeprom_write(9)
• port_get_link_speed(9)
• port_set_link_speed(9)
• port_force_link_speed(9)
• hw_chk_wol_pme_status(9)
• hw_clr_wol_pme_status(9)
• hw_cfg_wol_pme(9)
• hw_cfg_wol(9)
• hw_set_wol_frame(9)
• hw_add_wol_arp(9)
• hw_add_wol_bcast(9)
• hw_add_wol_mcast(9)
• hw_add_wol_ucast(9)
• hw_enable_wol(9)
• hw_init(9)
• hw_reset(9)
• hw_setup(9)
• hw_setup_intr(9)
• hw_set_desc_base(9)
• hw_start_rx(9)
• hw_stop_rx(9)
• hw_start_tx(9)
• hw_stop_tx(9)
• hw_disable(9)
• hw_enable(9)
• hw_alloc_pkt(9)
• hw_send_pkt(9)
• hw_set_addr(9)
• hw_read_addr(9)
• hw_clr_multicast(9)
• hw_set_grp_addr(9)
• hw_set_multicast(9)
• hw_set_promiscuous(9)
• sw_enable(9)
• sw_setup(9)
• ksz_start_timer(9)
• ksz_stop_timer(9)
• ksz_alloc_soft_desc(9)
• ksz_alloc_desc(9)
• free_dma_buf(9)
• ksz_init_rx_buffers(9)
• ksz_alloc_mem(9)
• ksz_free_desc(9)
• ksz_free_buffers(9)
• ksz_free_mem(9)
• send_packet(9)
• transmit_cleanup(9)
• tx_done(9)
• netdev_tx(9)
• netdev_tx_timeout(9)
• netdev_intr(9)
• netdev_close(9)
• netdev_query_statistics(9)
• netdev_set_mac_address(9)
• netdev_set_rx_mode(9)
• netdev_ioctl(9)
• mdio_read(9)
• mdio_write(9)
• netdev_get_link_ksettings(9)
• netdev_set_link_ksettings(9)
• netdev_nway_reset(9)
• netdev_get_link(9)
• netdev_get_drvinfo(9)
• netdev_get_regs_len(9)
• netdev_get_regs(9)
• netdev_get_wol(9)
• netdev_set_wol(9)
• netdev_get_msglevel(9)
• netdev_set_msglevel(9)
• netdev_get_eeprom_len(9)
• netdev_get_eeprom(9)
• netdev_set_eeprom(9)
• netdev_get_pauseparam(9)
• netdev_set_pauseparam(9)
• netdev_get_ringparam(9)
• netdev_get_strings(9)
• netdev_get_sset_count(9)
• netdev_get_ethtool_stats(9)
• netdev_set_features(9)
• dev_monitor(9)
• netdev_init(9)

that's the whole page, bestie 💋 — source/version: ./drivers/net/ethernet/micrel • date: October 2026. go open that network device, periodt 🫶