lib/test_sysctl.c

File Facts

System

Linux kernel

Corpus path

lib/test_sysctl.c

Extension

.c

Size

7939 bytes

Lines

336

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• 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/list.h
• linux/module.h
• linux/printk.h
• linux/fs.h
• linux/miscdevice.h
• linux/slab.h
• linux/uaccess.h
• linux/async.h
• linux/delay.h
• linux/vmalloc.h

Detected Declarations

• struct test_sysctl_data
• function test_sysctl_calc_match_int_ok
• function test_sysctl_setup_node_tests
• function test_sysctl_run_unregister_nested
• function test_sysctl_run_register_mount_point
• function test_sysctl_run_register_empty
• function test_sysctl_register_u8_extra
• function test_sysctl_init
• function test_sysctl_exit
• module init test_sysctl_init

Annotated Snippet

module_init(test_sysctl_init);

static void __exit test_sysctl_exit(void)
{
	kfree(test_data.bitmap_0001);
	for (int i = 0; i < TEST_H_SIZE; i++) {
		if (ctl_headers[i])
			unregister_sysctl_table(ctl_headers[i]);
	}
}

module_exit(test_sysctl_exit);

MODULE_AUTHOR("Luis R. Rodriguez <mcgrof@kernel.org>");
MODULE_DESCRIPTION("proc sysctl test driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/init.h`, `linux/list.h`, `linux/module.h`, `linux/printk.h`, `linux/fs.h`, `linux/miscdevice.h`, `linux/slab.h`, `linux/uaccess.h`.
• Detected declarations: `struct test_sysctl_data`, `function test_sysctl_calc_match_int_ok`, `function test_sysctl_setup_node_tests`, `function test_sysctl_run_unregister_nested`, `function test_sysctl_run_register_mount_point`, `function test_sysctl_run_register_empty`, `function test_sysctl_register_u8_extra`, `function test_sysctl_init`, `function test_sysctl_exit`, `module init test_sysctl_init`.
• Atlas domain: Kernel Services / lib.
• Implementation status: integration implementation candidate.

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.