fs/f2fs/dir.c

File Facts

System

Linux kernel

Corpus path

fs/f2fs/dir.c

Extension

.c

Size

28346 bytes

Lines

1142

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/unaligned.h
• linux/fs.h
• linux/f2fs_fs.h
• linux/filelock.h
• linux/sched/signal.h
• linux/unicode.h
• f2fs.h
• node.h
• acl.h
• xattr.h
• trace/events/f2fs.h

Detected Declarations

• function Copyright
• function dir_blocks
• function dir_buckets
• function bucket_blocks
• function f2fs_init_casefolded_name
• function f2fs_free_casefolded_name
• function __f2fs_setup_filename
• function fscrypt_setup_filename
• function fscrypt_prepare_lookup
• function f2fs_free_filename
• function dir_block_index
• function f2fs_match_name
• function IS_CASEFOLDED
• function found
• function f2fs_inode_by_name
• function f2fs_set_link
• function init_dent_inode
• function f2fs_do_make_empty_dir
• function make_empty_dir
• function f2fs_update_parent_metadata
• function f2fs_room_for_filename
• function f2fs_has_enough_room
• function f2fs_update_dentry
• function f2fs_add_regular_entry
• function f2fs_add_dentry
• function f2fs_lock_op
• function f2fs_do_tmpfile
• function f2fs_drop_nlink
• function f2fs_delete_entry
• function f2fs_empty_dir
• function f2fs_fill_dentries
• function f2fs_readdir

Annotated Snippet

const struct file_operations f2fs_dir_operations = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate_shared	= f2fs_readdir,
	.fsync		= f2fs_sync_file,
	.unlocked_ioctl	= f2fs_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = f2fs_compat_ioctl,
#endif
	.setlease	= generic_setlease,
};

Annotation

• Immediate include surface: `linux/unaligned.h`, `linux/fs.h`, `linux/f2fs_fs.h`, `linux/filelock.h`, `linux/sched/signal.h`, `linux/unicode.h`, `f2fs.h`, `node.h`.
• Detected declarations: `function Copyright`, `function dir_blocks`, `function dir_buckets`, `function bucket_blocks`, `function f2fs_init_casefolded_name`, `function f2fs_free_casefolded_name`, `function __f2fs_setup_filename`, `function fscrypt_setup_filename`, `function fscrypt_prepare_lookup`, `function f2fs_free_filename`.
• 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.