drivers/ras/debugfs.c

File Facts

System

Linux kernel

Corpus path

drivers/ras/debugfs.c

Extension

.c

Size

1277 bytes

Lines

66

Domain

Driver Families

Bucket

drivers/ras

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/debugfs.h
• linux/ras.h
• debugfs.h

Detected Declarations

• function ras_userspace_consumers
• function trace_show
• function trace_open
• function trace_release
• function ras_add_daemon_trace
• function ras_debugfs_init
• export ras_get_debugfs_root
• export ras_userspace_consumers

Annotated Snippet

static const struct file_operations trace_fops = {
	.open    = trace_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = trace_release,
};

int __init ras_add_daemon_trace(void)
{
	struct dentry *fentry;

	if (!ras_debugfs_dir)
		return -ENOENT;

	fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir,
				     NULL, &trace_fops);
	if (IS_ERR(fentry))
		return -ENODEV;

	return 0;

}

void __init ras_debugfs_init(void)
{
	ras_debugfs_dir = debugfs_create_dir("ras", NULL);
}

Annotation

• Immediate include surface: `linux/debugfs.h`, `linux/ras.h`, `debugfs.h`.
• Detected declarations: `function ras_userspace_consumers`, `function trace_show`, `function trace_open`, `function trace_release`, `function ras_add_daemon_trace`, `function ras_debugfs_init`, `export ras_get_debugfs_root`, `export ras_userspace_consumers`.
• Atlas domain: Driver Families / drivers/ras.
• Implementation status: pattern 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.