fs/ubifs/dir.c

File Facts

System

Linux kernel

Corpus path

fs/ubifs/dir.c

Extension

.c

Size

46622 bytes

Lines

1773

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.
• 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

• ubifs.h

Detected Declarations

• struct ubifs_dir_data
• function inherit_flags
• function dbg_check_name
• function ubifs_prepare_create
• function ubifs_create
• function lock_2_inodes
• function unlock_2_inodes
• function ubifs_tmpfile
• function vfs_dent_type
• function ubifs_readdir
• function ubifs_dir_release
• function ubifs_link
• function ubifs_unlink
• function ubifs_check_dir_empty
• function ubifs_rmdir
• function ubifs_mknod
• function ubifs_symlink
• function lock_4_inodes
• function unlock_4_inodes
• function do_rename
• function ubifs_xrename
• function ubifs_rename
• function ubifs_getattr
• function ubifs_dir_open
• function ubifs_dir_llseek

Annotated Snippet

const struct file_operations ubifs_dir_operations = {
	.open		= ubifs_dir_open,
	.llseek         = ubifs_dir_llseek,
	.release        = ubifs_dir_release,
	.read           = generic_read_dir,
	.iterate_shared = ubifs_readdir,
	.fsync          = ubifs_fsync,
	.unlocked_ioctl = ubifs_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = ubifs_compat_ioctl,
#endif
};

Annotation

• Immediate include surface: `ubifs.h`.
• Detected declarations: `struct ubifs_dir_data`, `function inherit_flags`, `function dbg_check_name`, `function ubifs_prepare_create`, `function ubifs_create`, `function lock_2_inodes`, `function unlock_2_inodes`, `function ubifs_tmpfile`, `function vfs_dent_type`, `function ubifs_readdir`.
• 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.