fs/btrfs/ref-verify.h

File Facts

System

Linux kernel

Corpus path

fs/btrfs/ref-verify.h

Extension

.h

Size

1299 bytes

Lines

59

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.
• 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/types.h
• linux/rbtree_types.h
• linux/spinlock.h

Detected Declarations

• struct btrfs_fs_info
• struct btrfs_ref
• function btrfs_init_ref_verify
• function btrfs_build_ref_tree
• function btrfs_free_ref_cache
• function btrfs_free_ref_tree_range

Annotated Snippet

#ifndef BTRFS_REF_VERIFY_H
#define BTRFS_REF_VERIFY_H

#include <linux/types.h>
#include <linux/rbtree_types.h>

struct btrfs_fs_info;
struct btrfs_ref;

#ifdef CONFIG_BTRFS_DEBUG

#include <linux/spinlock.h>

int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info);
void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info);
int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
		       const struct btrfs_ref *generic_ref);
void btrfs_free_ref_tree_range(struct btrfs_fs_info *fs_info, u64 start,
			       u64 len);

static inline void btrfs_init_ref_verify(struct btrfs_fs_info *fs_info)
{
	spin_lock_init(&fs_info->ref_verify_lock);
	fs_info->block_tree = RB_ROOT;
}
#else
static inline int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
{
	return 0;
}

static inline void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info)
{
}

static inline int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
				     const struct btrfs_ref *generic_ref)
{
	return 0;
}

static inline void btrfs_free_ref_tree_range(struct btrfs_fs_info *fs_info,
					     u64 start, u64 len)
{
}

static inline void btrfs_init_ref_verify(struct btrfs_fs_info *fs_info)
{
}

#endif /* CONFIG_BTRFS_DEBUG */

#endif

Annotation

• Immediate include surface: `linux/types.h`, `linux/rbtree_types.h`, `linux/spinlock.h`.
• Detected declarations: `struct btrfs_fs_info`, `struct btrfs_ref`, `function btrfs_init_ref_verify`, `function btrfs_build_ref_tree`, `function btrfs_free_ref_cache`, `function btrfs_free_ref_tree_range`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source 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.