fs/smb/common/fscc.h

File Facts

System

Linux kernel

Corpus path

fs/smb/common/fscc.h

Extension

.h

Size

18773 bytes

Lines

585

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: implementation source

Status

source 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 or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct reparse_data_buffer
• struct reparse_guid_data_buffer
• struct reparse_mount_point_data_buffer
• struct reparse_symlink_data_buffer
• struct reparse_nfs_data_buffer
• struct reparse_wsl_symlink_data_buffer
• struct duplicate_extents_to_file
• struct duplicate_extents_to_file_ex
• struct compress_ioctl
• struct fsctl_get_integrity_information_rsp
• struct file_allocated_range_buffer
• struct fsctl_query_file_regions_req
• struct file_region_info
• struct fsctl_query_file_region_rsp
• struct fsctl_query_on_disk_vol_info_rsp
• struct fsctl_set_integrity_information_req
• struct fsctl_set_integrity_info_ex_req
• struct file_zero_data_information
• struct smb2_file_all_info
• struct smb2_file_eof_info
• struct smb2_file_internal_info
• struct smb2_file_link_info
• struct smb2_file_network_open_info
• struct smb2_file_rename_info
• struct smb2_fs_control_info
• struct smb2_fs_full_size_info
• struct smb3_fs_ss_info
• struct filesystem_vol_info
• struct file_notify_information

Annotated Snippet

struct reparse_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__u8	DataBuffer[]; /* Variable Length */
} __packed;

struct reparse_guid_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__u8	ReparseGuid[16];
	__u8	DataBuffer[]; /* Variable Length */
} __packed;

struct reparse_mount_point_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le16	SubstituteNameOffset;
	__le16	SubstituteNameLength;
	__le16	PrintNameOffset;
	__le16	PrintNameLength;
	__u8	PathBuffer[]; /* Variable Length */
} __packed;

#define SYMLINK_FLAG_RELATIVE 0x00000001

struct reparse_symlink_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le16	SubstituteNameOffset;
	__le16	SubstituteNameLength;
	__le16	PrintNameOffset;
	__le16	PrintNameLength;
	__le32	Flags;
	__u8	PathBuffer[]; /* Variable Length */
} __packed;

/* For IO_REPARSE_TAG_NFS - see MS-FSCC 2.1.2.6 */
#define NFS_SPECFILE_LNK	0x00000000014B4E4C
#define NFS_SPECFILE_CHR	0x0000000000524843
#define NFS_SPECFILE_BLK	0x00000000004B4C42
#define NFS_SPECFILE_FIFO	0x000000004F464946
#define NFS_SPECFILE_SOCK	0x000000004B434F53
struct reparse_nfs_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le64	InodeType; /* NFS_SPECFILE_* */
	__u8	DataBuffer[];
} __packed;

/* For IO_REPARSE_TAG_LX_SYMLINK - see MS-FSCC 2.1.2.7 */
struct reparse_wsl_symlink_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le32	Version; /* Always 2 */
	__u8	Target[]; /* Variable Length UTF-8 string without nul-term */
} __packed;

/* See MS-FSCC 2.3.7 */
struct duplicate_extents_to_file {
	__u64 PersistentFileHandle; /* source file handle, opaque endianness */
	__u64 VolatileFileHandle;
	__le64 SourceFileOffset;
	__le64 TargetFileOffset;
	__le64 ByteCount;  /* Bytes to be copied */
} __packed;

/* See MS-FSCC 2.3.9 */
#define DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC	0x00000001
struct duplicate_extents_to_file_ex {
	__le64 StructureSize; /* MUST be set to 0x30 */
	__u64 PersistentFileHandle; /* source file handle, opaque endianness */
	__u64 VolatileFileHandle;
	__le64 SourceFileOffset;
	__le64 TargetFileOffset;
	__le64 ByteCount;  /* Bytes to be copied */
	__le32 Flags;
	__le32 Reserved;
} __packed;

/*
 * compression state flags
 * See MS-FSCC 2.3.18
 *     MS-FSCC 2.3.67
 *     MS-FSCC 2.4.9

Annotation

• Detected declarations: `struct reparse_data_buffer`, `struct reparse_guid_data_buffer`, `struct reparse_mount_point_data_buffer`, `struct reparse_symlink_data_buffer`, `struct reparse_nfs_data_buffer`, `struct reparse_wsl_symlink_data_buffer`, `struct duplicate_extents_to_file`, `struct duplicate_extents_to_file_ex`, `struct compress_ioctl`, `struct fsctl_get_integrity_information_rsp`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source 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.