fs/ceph/ceph_frag.c

File Facts

System

Linux kernel

Corpus path

fs/ceph/ceph_frag.c

Extension

.c

Size

401 bytes

Lines

24

Domain

Core OS

Bucket

VFS And Filesystem Core

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.

Dependency Surface

• linux/module.h
• linux/ceph/types.h

Detected Declarations

• function ceph_frag_compare

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Ceph 'frag' type
 */
#include <linux/module.h>
#include <linux/ceph/types.h>

int ceph_frag_compare(__u32 a, __u32 b)
{
	unsigned va = ceph_frag_value(a);
	unsigned vb = ceph_frag_value(b);
	if (va < vb)
		return -1;
	if (va > vb)
		return 1;
	va = ceph_frag_bits(a);
	vb = ceph_frag_bits(b);
	if (va < vb)
		return -1;
	if (va > vb)
		return 1;
	return 0;
}

Annotation

• Immediate include surface: `linux/module.h`, `linux/ceph/types.h`.
• Detected declarations: `function ceph_frag_compare`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source 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.