fs/orangefs/file.c

File Facts

System

Linux kernel

Corpus path

fs/orangefs/file.c

Extension

.c

Size

15530 bytes

Lines

588

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• protocol.h
• orangefs-kernel.h
• orangefs-bufmap.h
• linux/fs.h
• linux/filelock.h
• linux/pagemap.h

Detected Declarations

• function flush_racache
• function wait_for_direct_io
• function service_operation
• function orangefs_revalidate_mapping
• function orangefs_file_read_iter
• function orangefs_file_splice_read
• function orangefs_file_write_iter
• function orangefs_fault
• function orangefs_file_mmap_prepare
• function file
• function mmap
• function orangefs_fsync
• function orangefs_file_llseek
• function locks
• function orangefs_flush

Annotated Snippet

const struct file_operations orangefs_file_operations = {
	.llseek		= orangefs_file_llseek,
	.read_iter	= orangefs_file_read_iter,
	.write_iter	= orangefs_file_write_iter,
	.lock		= orangefs_lock,
	.mmap_prepare	= orangefs_file_mmap_prepare,
	.open		= generic_file_open,
	.splice_read    = orangefs_file_splice_read,
	.splice_write   = iter_file_splice_write,
	.flush		= orangefs_flush,
	.release	= orangefs_file_release,
	.fsync		= orangefs_fsync,
	.setlease	= generic_setlease,
};

Annotation

• Immediate include surface: `protocol.h`, `orangefs-kernel.h`, `orangefs-bufmap.h`, `linux/fs.h`, `linux/filelock.h`, `linux/pagemap.h`.
• Detected declarations: `function flush_racache`, `function wait_for_direct_io`, `function service_operation`, `function orangefs_revalidate_mapping`, `function orangefs_file_read_iter`, `function orangefs_file_splice_read`, `function orangefs_file_write_iter`, `function orangefs_fault`, `function orangefs_file_mmap_prepare`, `function file`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.