fs/efs/efs.h

File Facts

System

Linux kernel

Corpus path

fs/efs/efs.h

Extension

.h

Size

3840 bytes

Lines

145

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/fs.h
• linux/uaccess.h
• linux/efs_fs_sb.h

Detected Declarations

• struct extent_s
• struct efs_dinode
• struct efs_inode_info
• struct efs_dentry
• struct efs_dir
• struct statfs
• struct fid

Annotated Snippet

extern const struct file_operations efs_dir_operations;
extern const struct address_space_operations efs_symlink_aops;

extern struct inode *efs_iget(struct super_block *, unsigned long);
extern efs_block_t efs_map_block(struct inode *, efs_block_t);
extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);

extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
		int fh_len, int fh_type);
extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
		int fh_len, int fh_type);
extern struct dentry *efs_get_parent(struct dentry *);
extern int efs_bmap(struct inode *, int);

#endif /* _EFS_EFS_H_ */

Annotation

• Immediate include surface: `linux/fs.h`, `linux/uaccess.h`, `linux/efs_fs_sb.h`.
• Detected declarations: `struct extent_s`, `struct efs_dinode`, `struct efs_inode_info`, `struct efs_dentry`, `struct efs_dir`, `struct statfs`, `struct fid`.
• 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.