fs/smb/client/cifsfs.c

File Facts

System

Linux kernel

Corpus path

fs/smb/client/cifsfs.c

Extension

.c

Size

61736 bytes

Lines

2207

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

• linux/module.h
• linux/fs.h
• linux/fs_context.h
• linux/filelock.h
• linux/mount.h
• linux/slab.h
• linux/init.h
• linux/list.h
• linux/seq_file.h
• linux/vfs.h
• linux/mempool.h
• linux/delay.h
• linux/kthread.h
• linux/freezer.h
• linux/namei.h
• linux/random.h
• linux/splice.h
• linux/uuid.h
• linux/xattr.h
• linux/mm.h
• linux/key-type.h
• linux/fileattr.h
• uapi/linux/magic.h
• net/ipv6.h
• cifsfs.h
• cifsglob.h
• cifsproto.h
• smb2proto.h
• cifs_debug.h
• cifs_fs_sb.h
• cifs_spnego.h
• fscache.h

Detected Declarations

• function cifs_sb_active
• function cifs_sb_deactive
• function cifs_read_super
• function else
• function cifs_kill_sb
• function cifs_statfs
• function cifs_fallocate
• function cifs_permission
• function cifs_alloc_inode
• function cifs_free_inode
• function cifs_evict_inode
• function cifs_show_address
• function cifs_show_security
• function cifs_show_cache_flavor
• function cifs_show_devname
• function cifs_show_upcall_target
• function cifs_show_options
• function cifs_umount_begin
• function cifs_freeze
• function cifs_show_stats
• function cifs_write_inode
• function cifs_drop_inode
• function cifs_get_root
• function cifs_smb3_do_mount
• function cifs_llseek
• function cifs_setlease
• function cifs_fileattr_get
• function cifs_precopy_set_eof
• function cifs_flush_folio
• function cifs_remap_file_range
• function cifs_file_copychunk_range
• function cifs_dir_fsync
• function cifs_copy_file_range
• function cifs_init_once
• function cifs_init_inodecache
• function cifs_destroy_inodecache
• function cifs_init_request_bufs
• function cifs_destroy_request_bufs
• function init_mids
• function destroy_mids
• function cifs_init_netfs
• function cifs_destroy_netfs
• function init_cifs
• function exit_cifs
• module init init_cifs

Annotated Snippet

const struct file_operations cifs_file_ops = {
	.read_iter = cifs_loose_read_iter,
	.write_iter = cifs_file_write_iter,
	.open = cifs_open,
	.release = cifs_close,
	.lock = cifs_lock,
	.flock = cifs_flock,
	.fsync = cifs_fsync,
	.flush = cifs_flush,
	.mmap_prepare = cifs_file_mmap_prepare,
	.splice_read = filemap_splice_read,
	.splice_write = iter_file_splice_write,
	.llseek = cifs_llseek,
	.unlocked_ioctl	= cifs_ioctl,
	.copy_file_range = cifs_copy_file_range,
	.remap_file_range = cifs_remap_file_range,
	.setlease = cifs_setlease,
	.fallocate = cifs_fallocate,
};

const struct file_operations cifs_file_strict_ops = {
	.read_iter = cifs_strict_readv,
	.write_iter = cifs_strict_writev,
	.open = cifs_open,
	.release = cifs_close,
	.lock = cifs_lock,
	.flock = cifs_flock,
	.fsync = cifs_strict_fsync,
	.flush = cifs_flush,
	.mmap_prepare = cifs_file_strict_mmap_prepare,
	.splice_read = filemap_splice_read,
	.splice_write = iter_file_splice_write,
	.llseek = cifs_llseek,
	.unlocked_ioctl	= cifs_ioctl,
	.copy_file_range = cifs_copy_file_range,
	.remap_file_range = cifs_remap_file_range,
	.setlease = cifs_setlease,
	.fallocate = cifs_fallocate,
};

const struct file_operations cifs_file_direct_ops = {
	.read_iter = netfs_unbuffered_read_iter,
	.write_iter = cifs_direct_write_iter,
	.open = cifs_open,
	.release = cifs_close,
	.lock = cifs_lock,
	.flock = cifs_flock,
	.fsync = cifs_fsync,
	.flush = cifs_flush,
	.mmap_prepare = cifs_file_mmap_prepare,
	.splice_read = copy_splice_read,
	.splice_write = iter_file_splice_write,
	.unlocked_ioctl  = cifs_ioctl,
	.copy_file_range = cifs_copy_file_range,
	.remap_file_range = cifs_remap_file_range,
	.llseek = cifs_llseek,
	.setlease = cifs_setlease,
	.fallocate = cifs_fallocate,
};

const struct file_operations cifs_file_nobrl_ops = {
	.read_iter = cifs_loose_read_iter,
	.write_iter = cifs_file_write_iter,
	.open = cifs_open,
	.release = cifs_close,
	.fsync = cifs_fsync,
	.flush = cifs_flush,
	.mmap_prepare = cifs_file_mmap_prepare,
	.splice_read = filemap_splice_read,
	.splice_write = iter_file_splice_write,
	.llseek = cifs_llseek,
	.unlocked_ioctl	= cifs_ioctl,
	.copy_file_range = cifs_copy_file_range,
	.remap_file_range = cifs_remap_file_range,
	.setlease = cifs_setlease,
	.fallocate = cifs_fallocate,
};

const struct file_operations cifs_file_strict_nobrl_ops = {
	.read_iter = cifs_strict_readv,
	.write_iter = cifs_strict_writev,
	.open = cifs_open,
	.release = cifs_close,
	.fsync = cifs_strict_fsync,
	.flush = cifs_flush,
	.mmap_prepare = cifs_file_strict_mmap_prepare,
	.splice_read = filemap_splice_read,
	.splice_write = iter_file_splice_write,
	.llseek = cifs_llseek,
	.unlocked_ioctl	= cifs_ioctl,

Annotation

• Immediate include surface: `linux/module.h`, `linux/fs.h`, `linux/fs_context.h`, `linux/filelock.h`, `linux/mount.h`, `linux/slab.h`, `linux/init.h`, `linux/list.h`.
• Detected declarations: `function cifs_sb_active`, `function cifs_sb_deactive`, `function cifs_read_super`, `function else`, `function cifs_kill_sb`, `function cifs_statfs`, `function cifs_fallocate`, `function cifs_permission`, `function cifs_alloc_inode`, `function cifs_free_inode`.
• 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.