fs/f2fs/file.c

File Facts

System

Linux kernel

Corpus path

fs/f2fs/file.c

Extension

.c

Size

135586 bytes

Lines

5492

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.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• 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

• linux/blk-crypto.h
• linux/fs.h
• linux/f2fs_fs.h
• linux/stat.h
• linux/writeback.h
• linux/blkdev.h
• linux/falloc.h
• linux/filelock.h
• linux/types.h
• linux/compat.h
• linux/uaccess.h
• linux/mount.h
• linux/uio.h
• linux/uuid.h
• linux/file.h
• linux/nls.h
• linux/sched/signal.h
• linux/fileattr.h
• linux/fadvise.h
• linux/iomap.h
• f2fs.h
• node.h
• segment.h
• xattr.h
• acl.h
• gc.h
• iostat.h
• trace/events/f2fs.h
• uapi/linux/f2fs.h

Detected Declarations

• struct compat_f2fs_gc_range
• struct compat_f2fs_move_range
• function Copyright
• function f2fs_filemap_fault
• function f2fs_vm_page_mkwrite
• function mapping_large_folio_support
• function folio_pos
• function i_size_read
• function get_parent_ino
• function need_do_checkpoint
• function need_inode_page_update
• function try_to_fix_pino
• function get_parent_ino
• function f2fs_do_sync_file
• function f2fs_sync_file
• function __found_offset
• function f2fs_seek_block
• function f2fs_llseek
• function f2fs_file_mmap_prepare
• function finish_preallocate_blocks
• function f2fs_file_open
• function f2fs_truncate_data_blocks_range
• function truncate_partial_data_page
• function f2fs_do_truncate_blocks
• function f2fs_truncate_blocks
• function f2fs_truncate
• function f2fs_force_buffered_io
• function f2fs_getattr
• function __setattr_copy
• function f2fs_setattr
• function i_gid_needs_update
• function fill_zero
• function f2fs_truncate_hole
• function f2fs_punch_hole
• function __read_out_blkaddrs
• function __roll_back_blkaddrs
• function __clone_blkaddrs
• function __exchange_data_block
• function f2fs_do_collapse
• function f2fs_collapse_range
• function f2fs_do_zero_range
• function f2fs_zero_range
• function f2fs_insert_range
• function f2fs_expand_inode_data
• function f2fs_fallocate
• function f2fs_release_file
• function f2fs_file_flush
• function f2fs_setflags_common

Annotated Snippet

const struct file_operations f2fs_file_operations = {
	.llseek		= f2fs_llseek,
	.read_iter	= f2fs_file_read_iter,
	.write_iter	= f2fs_file_write_iter,
	.iopoll		= iocb_bio_iopoll,
	.open		= f2fs_file_open,
	.release	= f2fs_release_file,
	.mmap_prepare	= f2fs_file_mmap_prepare,
	.flush		= f2fs_file_flush,
	.fsync		= f2fs_sync_file,
	.fallocate	= f2fs_fallocate,
	.unlocked_ioctl	= f2fs_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= f2fs_compat_ioctl,
#endif
	.splice_read	= f2fs_file_splice_read,
	.splice_write	= iter_file_splice_write,
	.fadvise	= f2fs_file_fadvise,
	.fop_flags	= FOP_BUFFER_RASYNC,
	.setlease	= generic_setlease,
};

Annotation

• Immediate include surface: `linux/blk-crypto.h`, `linux/fs.h`, `linux/f2fs_fs.h`, `linux/stat.h`, `linux/writeback.h`, `linux/blkdev.h`, `linux/falloc.h`, `linux/filelock.h`.
• Detected declarations: `struct compat_f2fs_gc_range`, `struct compat_f2fs_move_range`, `function Copyright`, `function f2fs_filemap_fault`, `function f2fs_vm_page_mkwrite`, `function mapping_large_folio_support`, `function folio_pos`, `function i_size_read`, `function get_parent_ino`, `function need_do_checkpoint`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.