fs/nilfs2/dir.c

File Facts

System

Linux kernel

Corpus path

fs/nilfs2/dir.c

Extension

.c

Size

17038 bytes

Lines

667

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/pagemap.h
• linux/filelock.h
• nilfs.h
• page.h

Detected Declarations

• function Copyright
• function nilfs_rec_len_to_disk
• function nilfs_chunk_size
• function nilfs_last_byte
• function nilfs_prepare_chunk
• function nilfs_commit_chunk
• function nilfs_check_folio
• function nilfs_match
• function nilfs_readdir
• function nilfs_find_entry
• function nilfs_inode_by_name
• function nilfs_set_link
• function nilfs_add_link
• function nilfs_delete_entry
• function nilfs_make_empty
• function empty

Annotated Snippet

const struct file_operations nilfs_dir_operations = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate_shared	= nilfs_readdir,
	.unlocked_ioctl	= nilfs_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= nilfs_compat_ioctl,
#endif	/* CONFIG_COMPAT */
	.fsync		= nilfs_sync_file,
	.setlease	= generic_setlease,
};

Annotation

• Immediate include surface: `linux/pagemap.h`, `linux/filelock.h`, `nilfs.h`, `page.h`.
• Detected declarations: `function Copyright`, `function nilfs_rec_len_to_disk`, `function nilfs_chunk_size`, `function nilfs_last_byte`, `function nilfs_prepare_chunk`, `function nilfs_commit_chunk`, `function nilfs_check_folio`, `function nilfs_match`, `function nilfs_readdir`, `function nilfs_find_entry`.
• 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.