fs/ufs/dir.c

File Facts

System

Linux kernel

Corpus path

fs/ufs/dir.c

Extension

.c

Size

16654 bytes

Lines

659

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.
• 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/time.h
• linux/fs.h
• linux/filelock.h
• linux/swap.h
• linux/iversion.h
• ufs_fs.h
• ufs.h
• swab.h
• util.h

Detected Declarations

• function Copyright
• function ufs_commit_chunk
• function ufs_handle_dirsync
• function ufs_inode_by_name
• function ufs_set_link
• function ufs_check_folio
• function ufs_last_byte
• function ufs_next_entry
• function ufs_find_entry
• function ufs_add_link
• function ufs_validate_entry
• function ufs_readdir
• function ufs_delete_entry
• function ufs_make_empty
• function empty
• function ufs_dir_open
• function ufs_dir_release
• function ufs_dir_llseek

Annotated Snippet

const struct file_operations ufs_dir_operations = {
	.open		= ufs_dir_open,
	.release	= ufs_dir_release,
	.read		= generic_read_dir,
	.iterate_shared	= ufs_readdir,
	.fsync		= simple_fsync,
	.llseek		= ufs_dir_llseek,
	.setlease	= generic_setlease,
};

Annotation

• Immediate include surface: `linux/time.h`, `linux/fs.h`, `linux/filelock.h`, `linux/swap.h`, `linux/iversion.h`, `ufs_fs.h`, `ufs.h`, `swab.h`.
• Detected declarations: `function Copyright`, `function ufs_commit_chunk`, `function ufs_handle_dirsync`, `function ufs_inode_by_name`, `function ufs_set_link`, `function ufs_check_folio`, `function ufs_last_byte`, `function ufs_next_entry`, `function ufs_find_entry`, `function ufs_add_link`.
• 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.