include/linux/icmp.h

File Facts

System

Linux kernel

Corpus path

include/linux/icmp.h

Extension

.h

Size

1755 bytes

Lines

76

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source 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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/skbuff.h
• uapi/linux/icmp.h
• uapi/linux/errqueue.h

Detected Declarations

• struct icmp_ext_iio_name_subobj
• function icmp_is_err

Annotated Snippet

struct icmp_ext_iio_name_subobj {
	u8 len;
	char name[IFNAMSIZ];
};

enum {
	/* RFC 5837 - Incoming IP Interface Role */
	ICMP_ERR_EXT_IIO_IIF,
	/* Add new constants above. Used by "icmp_errors_extension_mask"
	 * sysctl.
	 */
	ICMP_ERR_EXT_COUNT,
};

#endif	/* _LINUX_ICMP_H */

Annotation

• Immediate include surface: `linux/skbuff.h`, `uapi/linux/icmp.h`, `uapi/linux/errqueue.h`.
• Detected declarations: `struct icmp_ext_iio_name_subobj`, `function icmp_is_err`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.