fs/btrfs/super.h

File Facts

System

Linux kernel

Corpus path

fs/btrfs/super.h

Extension

.h

Size

954 bytes

Lines

39

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/fs.h
• fs.h

Detected Declarations

• struct super_block
• struct btrfs_fs_info
• function btrfs_set_sb_rdonly
• function btrfs_clear_sb_rdonly

Annotated Snippet

#ifndef BTRFS_SUPER_H
#define BTRFS_SUPER_H

#include <linux/types.h>
#include <linux/fs.h>
#include "fs.h"

struct super_block;
struct btrfs_fs_info;

bool btrfs_check_options(const struct btrfs_fs_info *info,
			 unsigned long long *mount_opt,
			 unsigned long flags);
int btrfs_sync_fs(struct super_block *sb, int wait);
char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
					  u64 subvol_objectid);
void btrfs_set_free_space_cache_settings(struct btrfs_fs_info *fs_info);

static inline struct btrfs_fs_info *btrfs_sb(const struct super_block *sb)
{
	return sb->s_fs_info;
}

static inline void btrfs_set_sb_rdonly(struct super_block *sb)
{
	sb->s_flags |= SB_RDONLY;
	set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}

static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
{
	sb->s_flags &= ~SB_RDONLY;
	clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}

#endif

Annotation

• Immediate include surface: `linux/types.h`, `linux/fs.h`, `fs.h`.
• Detected declarations: `struct super_block`, `struct btrfs_fs_info`, `function btrfs_set_sb_rdonly`, `function btrfs_clear_sb_rdonly`.
• 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.