fs/efivarfs/file.c

File Facts

System

Linux kernel

Corpus path

fs/efivarfs/file.c

Extension

.c

Size

3304 bytes

Lines

155

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.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/efi.h
• linux/delay.h
• linux/fs.h
• linux/slab.h
• linux/mount.h
• internal.h

Detected Declarations

• function Copyright
• function efivarfs_file_read
• function efivarfs_file_release
• function efivarfs_file_open

Annotated Snippet

const struct file_operations efivarfs_file_operations = {
	.open		= efivarfs_file_open,
	.read		= efivarfs_file_read,
	.write		= efivarfs_file_write,
	.release	= efivarfs_file_release,
};

Annotation

• Immediate include surface: `linux/efi.h`, `linux/delay.h`, `linux/fs.h`, `linux/slab.h`, `linux/mount.h`, `internal.h`.
• Detected declarations: `function Copyright`, `function efivarfs_file_read`, `function efivarfs_file_release`, `function efivarfs_file_open`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.

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.