block/error-injection.c

File Facts

System

Linux kernel

Corpus path

block/error-injection.c

Extension

.c

Size

7542 bytes

Lines

316

Domain

Representative Device Path

Bucket

PCIe NVMe Storage Path

Inferred role

Representative Device Path: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.

• Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.
• 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.
• 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/debugfs.h
• linux/blkdev.h
• linux/parser.h
• linux/seq_file.h
• blk.h
• error-injection.h

Detected Declarations

• struct blk_error_inject
• enum options
• function __blk_error_inject
• function error_inject_add
• function error_inject_removeall
• function match_op
• function match_status
• function blk_error_injection_parse_options
• function blk_error_injection_write
• function blk_error_injection_show
• function blk_error_injection_open
• function blk_error_injection_release
• function blk_error_injection_init
• function blk_error_injection_exit

Annotated Snippet

static const struct file_operations blk_error_injection_fops = {
	.owner		= THIS_MODULE,
	.write		= blk_error_injection_write,
	.read		= seq_read,
	.open		= blk_error_injection_open,
	.release	= blk_error_injection_release,
};

void blk_error_injection_init(struct gendisk *disk)
{
	debugfs_create_file("error_injection", 0600, disk->queue->debugfs_dir,
			disk, &blk_error_injection_fops);
}

void blk_error_injection_exit(struct gendisk *disk)
{
	error_inject_removeall(disk);
}

Annotation

• Immediate include surface: `linux/debugfs.h`, `linux/blkdev.h`, `linux/parser.h`, `linux/seq_file.h`, `blk.h`, `error-injection.h`.
• Detected declarations: `struct blk_error_inject`, `enum options`, `function __blk_error_inject`, `function error_inject_add`, `function error_inject_removeall`, `function match_op`, `function match_status`, `function blk_error_injection_parse_options`, `function blk_error_injection_write`, `function blk_error_injection_show`.
• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• 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.