kernel/kcsan/debugfs.c

File Facts

System

Linux kernel

Corpus path

kernel/kcsan/debugfs.c

Extension

.c

Size

8015 bytes

Lines

273

Domain

Core OS

Bucket

Scheduler, Processes, Timers, Sync, And Syscalls

Inferred role

Core OS: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• 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/atomic.h
• linux/bsearch.h
• linux/bug.h
• linux/debugfs.h
• linux/init.h
• linux/kallsyms.h
• linux/sched.h
• linux/seq_file.h
• linux/slab.h
• linux/sort.h
• linux/string.h
• linux/uaccess.h
• kcsan.h

Detected Declarations

• function microbenchmark
• function cmp_filterlist_addrs
• function kcsan_skip_report_debugfs
• function set_report_filterlist_whitelist
• function insert_report_filterlist
• function show_info
• function debugfs_open
• function debugfs_write
• function kcsan_debugfs_init

Annotated Snippet

static const struct file_operations debugfs_ops =
{
	.read	 = seq_read,
	.open	 = debugfs_open,
	.write	 = debugfs_write,
	.release = single_release
};

static int __init kcsan_debugfs_init(void)
{
	debugfs_create_file("kcsan", 0644, NULL, NULL, &debugfs_ops);
	return 0;
}

late_initcall(kcsan_debugfs_init);

Annotation

• Immediate include surface: `linux/atomic.h`, `linux/bsearch.h`, `linux/bug.h`, `linux/debugfs.h`, `linux/init.h`, `linux/kallsyms.h`, `linux/sched.h`, `linux/seq_file.h`.
• Detected declarations: `function microbenchmark`, `function cmp_filterlist_addrs`, `function kcsan_skip_report_debugfs`, `function set_report_filterlist_whitelist`, `function insert_report_filterlist`, `function show_info`, `function debugfs_open`, `function debugfs_write`, `function kcsan_debugfs_init`.
• Atlas domain: Core OS / Scheduler, Processes, Timers, Sync, And Syscalls.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.