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systemd-networkd

https://stackoverflow.com/questions/18858190/whats-in-include-uapi-of-kernel-source-project

#include <linux/if_bonding.h>

Interaction with Kernel via Netlink

src/network/networkd-setlink.c: Contains handlers like link_set_bond_handler to communicate with kernel netlink APIs for bond setup. src/basic/include/linux/if_bonding.h: Includes kernel-level definitions for bonding, such as modes and states.

网络管理

Netdev and Network Management

src/network/networkd-network.h: Describes the Network structure, including bond-related configurations. src/network/generator/network-generator.c: Contains functions like network_set_bond for applying bond configurations.

bond 设备初始化过程

src/network/netdev/bond.c 中有：

  • bond_init()：该函数注册为 bond_vtable.init，在 netdev_load_one() 中通过 NETDEV_VTABLE(netdev)->init(netdev) 调用。
  • netdev_bond_fill_message_create()：从 NetDev 中获取属性，构造 Netlink 消息。该函数注册为 bond_vtable.fill_message_create，调用链如下：
NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
  netdev_create_message() src/network/netdev/netdev.c
    independent_netdev_create(NetDev *netdev)
      netdev_request_to_create(NetDev *netdev)
    stacked_netdev_create(NetDev *netdev, Link *link, Request *req)
      link_request_stacked_netdev(Link *link, NetDev *netdev)