fs/btrfs/root-tree.h

File Facts

System

Linux kernel

Corpus path

fs/btrfs/root-tree.h

Extension

.h

Size

1652 bytes

Lines

43

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

Detected Declarations

• struct fscrypt_str
• struct extent_buffer
• struct btrfs_key
• struct btrfs_root
• struct btrfs_root_item
• struct btrfs_path
• struct btrfs_fs_info
• struct btrfs_block_rsv
• struct btrfs_trans_handle

Annotated Snippet

#ifndef BTRFS_ROOT_TREE_H
#define BTRFS_ROOT_TREE_H

#include <linux/types.h>

struct fscrypt_str;
struct extent_buffer;
struct btrfs_key;
struct btrfs_root;
struct btrfs_root_item;
struct btrfs_path;
struct btrfs_fs_info;
struct btrfs_block_rsv;
struct btrfs_trans_handle;

int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
				     struct btrfs_block_rsv *rsv,
				     int nitems, bool use_global_rsv);
int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
		       u64 ref_id, u64 dirid, u64 sequence,
		       const struct fscrypt_str *name);
int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
		       u64 ref_id, u64 dirid, u64 *sequence,
		       const struct fscrypt_str *name);
int btrfs_del_root(struct btrfs_trans_handle *trans, const struct btrfs_key *key);
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		      const struct btrfs_key *key,
		      struct btrfs_root_item *item);
int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		      struct btrfs_key *key, struct btrfs_root_item *item);
int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
		    struct btrfs_path *path, struct btrfs_root_item *root_item,
		    struct btrfs_key *root_key);
int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
void btrfs_update_root_times(struct btrfs_trans_handle *trans, struct btrfs_root *root);

#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct fscrypt_str`, `struct extent_buffer`, `struct btrfs_key`, `struct btrfs_root`, `struct btrfs_root_item`, `struct btrfs_path`, `struct btrfs_fs_info`, `struct btrfs_block_rsv`, `struct btrfs_trans_handle`.
• 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.