fs/btrfs/file.h

File Facts

System

Linux kernel

Corpus path

fs/btrfs/file.h

Extension

.h

Size

1966 bytes

Lines

52

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: operation-table or driver-model contract

Status

pattern 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 an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct file
• struct extent_state
• struct kiocb
• struct iov_iter
• struct inode
• struct folio
• struct page
• struct btrfs_ioctl_encoded_io_args
• struct btrfs_drop_extents_args
• struct btrfs_inode
• struct btrfs_root
• struct btrfs_path
• struct btrfs_replace_extent_info
• struct btrfs_trans_handle

Annotated Snippet

extern const struct file_operations btrfs_file_operations;

int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct btrfs_inode *inode,
		       struct btrfs_drop_extents_args *args);
int btrfs_replace_file_extents(struct btrfs_inode *inode,
			   struct btrfs_path *path, const u64 start,
			   const u64 end,
			   struct btrfs_replace_extent_info *extent_info,
			   struct btrfs_trans_handle **trans_out);
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct btrfs_inode *inode, u64 start, u64 end);
ssize_t btrfs_do_write_iter(struct kiocb *iocb, struct iov_iter *from,
			    const struct btrfs_ioctl_encoded_io_args *encoded);
int btrfs_release_file(struct inode *inode, struct file *file);
int btrfs_dirty_folio(struct btrfs_inode *inode, struct folio *folio, loff_t pos,
		      size_t write_bytes, struct extent_state **cached, bool noreserve);
int btrfs_fdatawrite_range(struct btrfs_inode *inode, loff_t start, loff_t end);
int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
			   size_t *write_bytes, bool nowait);
void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
bool btrfs_find_delalloc_in_range(struct btrfs_inode *inode, u64 start, u64 end,
				  struct extent_state **cached_state,
				  u64 *delalloc_start_ret, u64 *delalloc_end_ret);
int btrfs_write_check(struct kiocb *iocb, size_t count);
ssize_t btrfs_buffered_write(struct kiocb *iocb, struct iov_iter *i);

#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct file`, `struct extent_state`, `struct kiocb`, `struct iov_iter`, `struct inode`, `struct folio`, `struct page`, `struct btrfs_ioctl_encoded_io_args`, `struct btrfs_drop_extents_args`, `struct btrfs_inode`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern 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.