net/psample/psample.c

File Facts

System

Linux kernel

Corpus path

net/psample/psample.c

Extension

.c

Size

14232 bytes

Lines

534

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/types.h
• linux/kernel.h
• linux/skbuff.h
• linux/module.h
• linux/timekeeping.h
• net/net_namespace.h
• net/sock.h
• net/netlink.h
• net/genetlink.h
• net/psample.h
• linux/spinlock.h
• net/ip_tunnels.h
• net/dst_metadata.h

Detected Declarations

• enum psample_nl_multicast_groups
• function psample_group_nl_fill
• function psample_nl_cmd_get_group_dumpit
• function psample_group_notify
• function psample_group_destroy
• function psample_group_lookup
• function psample_group_take
• function psample_group_put
• function __psample_ip_tun_to_nlattr
• function psample_ip_tun_to_nlattr
• function psample_tunnel_meta_len
• function psample_sample_packet
• function psample_module_init
• function psample_module_exit
• module init psample_module_init
• export psample_group_get
• export psample_group_take
• export psample_group_put
• export psample_sample_packet

Annotated Snippet

module_init(psample_module_init);
module_exit(psample_module_exit);

MODULE_AUTHOR("Yotam Gigi <yotam.gi@gmail.com>");
MODULE_DESCRIPTION("netlink channel for packet sampling");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/types.h`, `linux/kernel.h`, `linux/skbuff.h`, `linux/module.h`, `linux/timekeeping.h`, `net/net_namespace.h`, `net/sock.h`, `net/netlink.h`.
• Detected declarations: `enum psample_nl_multicast_groups`, `function psample_group_nl_fill`, `function psample_nl_cmd_get_group_dumpit`, `function psample_group_notify`, `function psample_group_destroy`, `function psample_group_lookup`, `function psample_group_take`, `function psample_group_put`, `function __psample_ip_tun_to_nlattr`, `function psample_ip_tun_to_nlattr`.
• 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.