net/openvswitch/datapath.c

File Facts

System

Linux kernel

Corpus path

net/openvswitch/datapath.c

Extension

.c

Size

73201 bytes

Lines

2893

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

• Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/module.h
• linux/if_arp.h
• linux/if_vlan.h
• linux/in.h
• linux/ip.h
• linux/jhash.h
• linux/delay.h
• linux/time.h
• linux/etherdevice.h
• linux/kernel.h
• linux/kthread.h
• linux/mutex.h
• linux/percpu.h
• linux/rcupdate.h
• linux/tcp.h
• linux/udp.h
• linux/ethtool.h
• linux/wait.h
• asm/div64.h
• linux/highmem.h
• linux/netfilter_bridge.h
• linux/netfilter_ipv4.h
• linux/inetdevice.h
• linux/list.h
• linux/openvswitch.h
• linux/rculist.h
• linux/dmi.h
• net/genetlink.h
• net/gso.h
• net/net_namespace.h
• net/netns/generic.h

Detected Declarations

• function ovs_must_notify
• function ovs_notify
• function ovs_lock
• function ovs_unlock
• function lockdep_ovsl_is_held
• function get_dpifindex
• function destroy_dp_rcu
• function lockdep_ovsl_is_held
• function ovs_vport_update_upcall_stats
• function ovs_dp_detach_port
• function ovs_dp_process_packet
• function ovs_dp_upcall
• function queue_gso_packets
• function upcall_msg_size
• function pad_packet
• function queue_userspace_packet
• function nla_put_u16
• function nla_put_u32
• function skb_zerocopy
• function ovs_packet_cmd_execute
• function get_dp_stats
• function for_each_possible_cpu
• function should_fill_key
• function should_fill_mask
• function should_fill_actions
• function ovs_flow_cmd_msg_size
• function ovs_flow_cmd_fill_stats
• function ovs_flow_cmd_fill_actions
• function ovs_flow_cmd_fill_info
• function ovs_flow_cmd_new
• function ovs_nla_init_match_and_action
• function ovs_flow_cmd_set
• function ovs_flow_cmd_get
• function ovs_flow_cmd_del
• function ovs_flow_cmd_dump
• function ovs_dp_cmd_msg_size
• function ovs_dp_cmd_fill_info
• function ovs_dp_reset_user_features
• function ovs_dp_set_upcall_portids
• function ovs_dp_get_upcall_portid
• function ovs_dp_change
• function ovs_dp_stats_init
• function ovs_dp_vport_init
• function ovs_dp_cmd_new
• function __dp_destroy
• function ovs_dp_cmd_del
• function ovs_dp_cmd_set
• function ovs_dp_cmd_get

Annotated Snippet

module_init(dp_init);
module_exit(dp_cleanup);

MODULE_DESCRIPTION("Open vSwitch switching datapath");
MODULE_LICENSE("GPL");
MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY);
MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY);
MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY);
MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY);
MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY);
MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY);

Annotation

• Immediate include surface: `linux/init.h`, `linux/module.h`, `linux/if_arp.h`, `linux/if_vlan.h`, `linux/in.h`, `linux/ip.h`, `linux/jhash.h`, `linux/delay.h`.
• Detected declarations: `function ovs_must_notify`, `function ovs_notify`, `function ovs_lock`, `function ovs_unlock`, `function lockdep_ovsl_is_held`, `function get_dpifindex`, `function destroy_dp_rcu`, `function lockdep_ovsl_is_held`, `function ovs_vport_update_upcall_stats`, `function ovs_dp_detach_port`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.