fs/ecryptfs/file.c

File Facts

System

Linux kernel

Corpus path

fs/ecryptfs/file.c

Extension

.c

Size

12245 bytes

Lines

443

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

• linux/file.h
• linux/poll.h
• linux/slab.h
• linux/mount.h
• linux/pagemap.h
• linux/security.h
• linux/compat.h
• linux/fs_stack.h
• ecryptfs_kernel.h

Detected Declarations

• struct ecryptfs_getdents_callback
• function Copyright
• function ecryptfs_splice_read_update_atime
• function ecryptfs_filldir
• function ecryptfs_readdir
• function read_or_initialize_metadata
• function ecryptfs_mmap
• function ecryptfs_open
• function ecryptfs_dir_open
• function ecryptfs_flush
• function ecryptfs_release
• function ecryptfs_dir_release
• function ecryptfs_dir_llseek
• function ecryptfs_fsync
• function ecryptfs_fasync
• function ecryptfs_unlocked_ioctl
• function ecryptfs_compat_ioctl

Annotated Snippet

const struct file_operations ecryptfs_dir_fops = {
	.iterate_shared = ecryptfs_readdir,
	.read = generic_read_dir,
	.unlocked_ioctl = ecryptfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl = ecryptfs_compat_ioctl,
#endif
	.open = ecryptfs_dir_open,
	.release = ecryptfs_dir_release,
	.fsync = ecryptfs_fsync,
	.llseek = ecryptfs_dir_llseek,
};

const struct file_operations ecryptfs_main_fops = {
	.llseek = generic_file_llseek,
	.read_iter = ecryptfs_read_update_atime,
	.write_iter = generic_file_write_iter,
	.unlocked_ioctl = ecryptfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl = ecryptfs_compat_ioctl,
#endif
	.mmap = ecryptfs_mmap,
	.open = ecryptfs_open,
	.flush = ecryptfs_flush,
	.release = ecryptfs_release,
	.fsync = ecryptfs_fsync,
	.fasync = ecryptfs_fasync,
	.splice_read = ecryptfs_splice_read_update_atime,
};

Annotation

• Immediate include surface: `linux/file.h`, `linux/poll.h`, `linux/slab.h`, `linux/mount.h`, `linux/pagemap.h`, `linux/security.h`, `linux/compat.h`, `linux/fs_stack.h`.
• Detected declarations: `struct ecryptfs_getdents_callback`, `function Copyright`, `function ecryptfs_splice_read_update_atime`, `function ecryptfs_filldir`, `function ecryptfs_readdir`, `function read_or_initialize_metadata`, `function ecryptfs_mmap`, `function ecryptfs_open`, `function ecryptfs_dir_open`, `function ecryptfs_flush`.
• 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.