net/dsa/dsa.c

File Facts

System

Linux kernel

Corpus path

net/dsa/dsa.c

Extension

.c

Size

41454 bytes

Lines

1901

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.
• 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/device.h
• linux/err.h
• linux/if_hsr.h
• linux/list.h
• linux/module.h
• linux/netdevice.h
• linux/slab.h
• linux/rtnetlink.h
• linux/of.h
• linux/of_net.h
• net/dsa_stubs.h
• net/sch_generic.h
• conduit.h
• devlink.h
• dsa.h
• netlink.h
• port.h
• switch.h
• tag.h
• user.h

Detected Declarations

• function dsa_schedule_work
• function dsa_flush_workqueue
• function dsa_lag_map
• function dsa_lag_unmap
• function dsa_lags_foreach_id
• function dsa_bridge_num_find
• function list_for_each_entry
• function dsa_bridge_num_get
• function dsa_bridge_num_put
• function list_for_each_entry
• function list_for_each_entry
• function dsa_tree_free
• function dsa_tree_release
• function dsa_tree_put
• function dsa_port_setup_routing_table
• function of_for_each_phandle
• function dsa_tree_setup_routing_table
• function list_for_each_entry
• function dsa_tree_setup_default_cpu
• function list_for_each_entry
• function dsa_switch_preferred_default_local_cpu_port
• function dsa_tree_setup_cpu_ports
• function list_for_each_entry
• function dsa_switch_for_each_port
• function dsa_tree_teardown_cpu_ports
• function dsa_port_setup
• function dsa_port_teardown
• function dsa_port_setup_as_unused
• function dsa_switch_setup_tag_protocol
• function dsa_switch_teardown_tag_protocol
• function dsa_switch_setup
• function dsa_switch_teardown
• function dsa_tree_teardown_ports
• function dsa_tree_teardown_switches
• function dsa_tree_setup_ports
• function list_for_each_entry
• function list_for_each_entry
• function dsa_tree_setup_switches
• function list_for_each_entry
• function dsa_tree_setup_conduit
• function dsa_tree_for_each_cpu_port
• function dsa_tree_teardown_conduit
• function dsa_tree_for_each_cpu_port
• function dsa_tree_setup_lags
• function list_for_each_entry
• function dsa_tree_teardown_lags
• function dsa_tree_teardown_routing_table
• function list_for_each_entry_safe

Annotated Snippet

module_init(dsa_init_module);

static void __exit dsa_cleanup_module(void)
{
	dsa_unregister_stubs();

	rtnl_link_unregister(&dsa_link_ops);

	dsa_user_unregister_notifier();
	dev_remove_pack(&dsa_pack_type);
	destroy_workqueue(dsa_owq);
}
module_exit(dsa_cleanup_module);

MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:dsa");
MODULE_IMPORT_NS("NETDEV_INTERNAL");

Annotation

• Immediate include surface: `linux/device.h`, `linux/err.h`, `linux/if_hsr.h`, `linux/list.h`, `linux/module.h`, `linux/netdevice.h`, `linux/slab.h`, `linux/rtnetlink.h`.
• Detected declarations: `function dsa_schedule_work`, `function dsa_flush_workqueue`, `function dsa_lag_map`, `function dsa_lag_unmap`, `function dsa_lags_foreach_id`, `function dsa_bridge_num_find`, `function list_for_each_entry`, `function dsa_bridge_num_get`, `function dsa_bridge_num_put`, `function list_for_each_entry`.
• 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.

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.