tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

Extension

.c

Size

52633 bytes

Lines

2074

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• 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/bpf.h
• linux/btf.h
• linux/btf_ids.h
• linux/delay.h
• linux/error-injection.h
• linux/init.h
• linux/module.h
• linux/percpu-defs.h
• linux/sysfs.h
• linux/tracepoint.h
• linux/net.h
• linux/socket.h
• linux/nsproxy.h
• linux/inet.h
• linux/in.h
• linux/in6.h
• linux/un.h
• linux/filter.h
• linux/rcupdate_trace.h
• net/sock.h
• linux/namei.h
• bpf_testmod.h
• bpf_testmod_kfunc.h
• bpf_testmod-events.h

Detected Declarations

• struct bpf_testmod_struct_arg_1
• struct bpf_testmod_struct_arg_2
• struct bpf_testmod_struct_arg_3
• struct bpf_testmod_struct_arg_4
• struct bpf_testmod_struct_arg_5
• struct bpf_testmod_btf_type_tag_1
• struct bpf_testmod_btf_type_tag_2
• struct bpf_testmod_btf_type_tag_3
• struct testmod_uprobe
• struct bpf_kfunc_rcu_tasks_trace_data
• function bpf_testmod_test_struct_arg_1
• function bpf_testmod_test_struct_arg_2
• function bpf_testmod_test_struct_arg_3
• function bpf_testmod_test_struct_arg_4
• function bpf_testmod_test_struct_arg_5
• function bpf_testmod_test_struct_arg_6
• function bpf_testmod_test_struct_arg_7
• function bpf_testmod_test_struct_arg_8
• function bpf_testmod_test_struct_arg_9
• function bpf_testmod_test_union_arg_1
• function bpf_testmod_test_union_arg_2
• function bpf_testmod_test_arg_ptr_to_struct
• function bpf_testmod_looooooooooooooooooooooooooooooong_name
• function bpf_iter_testmod_seq_new
• function bpf_iter_testmod_seq_value
• function bpf_iter_testmod_seq_destroy
• function bpf_kfunc_common_test
• function bpf_kfunc_nested_release_test
• function bpf_kfunc_put_default_trusted_ptr_test
• function testmod_free_cb
• function bpf_testmod_ctx_release
• function bpf_testmod_ctx_release_dtor
• function bpf_testmod_test_3
• function bpf_testmod_test_4
• function bpf_testmod_test_struct_ops3
• function bpf_testmod_ops3_call_test_1
• function bpf_testmod_ops3_call_test_2
• function bpf_testmod_test_btf_type_tag_user_1
• function bpf_testmod_test_btf_type_tag_user_2
• function bpf_testmod_test_btf_type_tag_percpu_1
• function bpf_testmod_test_btf_type_tag_percpu_2
• function bpf_testmod_loop_test
• function bpf_testmod_fentry_test1
• function bpf_testmod_fentry_test2
• function bpf_testmod_fentry_test3
• function bpf_testmod_fentry_test7
• function bpf_testmod_fentry_test11
• function bpf_testmod_stacktrace_test

Annotated Snippet

module_init(bpf_testmod_init);
module_exit(bpf_testmod_exit);

MODULE_AUTHOR("Andrii Nakryiko");
MODULE_DESCRIPTION("BPF selftests module");
MODULE_LICENSE("Dual BSD/GPL");

Annotation

• Immediate include surface: `linux/bpf.h`, `linux/btf.h`, `linux/btf_ids.h`, `linux/delay.h`, `linux/error-injection.h`, `linux/init.h`, `linux/module.h`, `linux/percpu-defs.h`.
• Detected declarations: `struct bpf_testmod_struct_arg_1`, `struct bpf_testmod_struct_arg_2`, `struct bpf_testmod_struct_arg_3`, `struct bpf_testmod_struct_arg_4`, `struct bpf_testmod_struct_arg_5`, `struct bpf_testmod_btf_type_tag_1`, `struct bpf_testmod_btf_type_tag_2`, `struct bpf_testmod_btf_type_tag_3`, `struct testmod_uprobe`, `struct bpf_kfunc_rcu_tasks_trace_data`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.