fs/btrfs/defrag.h

File Facts

System

Linux kernel

Corpus path

fs/btrfs/defrag.h

Extension

.h

Size

927 bytes

Lines

32

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/compiler_types.h

Detected Declarations

• struct file_ra_state
• struct btrfs_inode
• struct btrfs_fs_info
• struct btrfs_root
• struct btrfs_trans_handle
• struct btrfs_ioctl_defrag_range_args
• function btrfs_defrag_cancelled

Annotated Snippet

#ifndef BTRFS_DEFRAG_H
#define BTRFS_DEFRAG_H

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

struct file_ra_state;
struct btrfs_inode;
struct btrfs_fs_info;
struct btrfs_root;
struct btrfs_trans_handle;
struct btrfs_ioctl_defrag_range_args;

int btrfs_defrag_file(struct btrfs_inode *inode, struct file_ra_state *ra,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_to_defrag);
int __init btrfs_auto_defrag_init(void);
void __cold btrfs_auto_defrag_exit(void);
void btrfs_add_inode_defrag(struct btrfs_inode *inode, u32 extent_thresh);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
int btrfs_defrag_root(struct btrfs_root *root);

static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
{
	return signal_pending(current);
}

#endif

Annotation

• Immediate include surface: `linux/types.h`, `linux/compiler_types.h`.
• Detected declarations: `struct file_ra_state`, `struct btrfs_inode`, `struct btrfs_fs_info`, `struct btrfs_root`, `struct btrfs_trans_handle`, `struct btrfs_ioctl_defrag_range_args`, `function btrfs_defrag_cancelled`.
• 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.