[mirror_edk2.git] / OvmfPkg / VirtioFsDxe / VirtioFsDxe.h

/** @file\r
  Internal macro definitions, type definitions, and function declarations for\r
  the Virtio Filesystem device driver.\r
\r
  Copyright (C) 2020, Red Hat, Inc.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#ifndef VIRTIO_FS_DXE_H_\r
#define VIRTIO_FS_DXE_H_\r
\r
#include <Base.h>                      // SIGNATURE_64()\r
#include <IndustryStandard/VirtioFs.h> // VIRTIO_FS_TAG_BYTES\r
#include <Library/DebugLib.h>          // CR()\r
#include <Protocol/SimpleFileSystem.h> // EFI_SIMPLE_FILE_SYSTEM_PROTOCOL\r
#include <Protocol/VirtioDevice.h>     // VIRTIO_DEVICE_PROTOCOL\r
#include <Uefi/UefiBaseType.h>         // EFI_EVENT\r
\r
#define VIRTIO_FS_SIG SIGNATURE_64 ('V', 'I', 'R', 'T', 'I', 'O', 'F', 'S')\r
\r
#define VIRTIO_FS_FILE_SIG \\r
  SIGNATURE_64 ('V', 'I', 'O', 'F', 'S', 'F', 'I', 'L')\r
\r
//\r
// Filesystem label encoded in UCS-2, transformed from the UTF-8 representation\r
// in "VIRTIO_FS_CONFIG.Tag", and NUL-terminated. Only the printable ASCII code\r
// points (U+0020 through U+007E) are supported.\r
//\r
typedef CHAR16 VIRTIO_FS_LABEL[VIRTIO_FS_TAG_BYTES + 1];\r
\r
//\r
// Main context structure, expressing an EFI_SIMPLE_FILE_SYSTEM_PROTOCOL\r
// interface on top of the Virtio Filesystem device.\r
//\r
typedef struct {\r
  //\r
  // Parts of this structure are initialized / torn down in various functions\r
  // at various call depths. The table to the right should make it easier to\r
  // track them.\r
  //\r
  //                              field         init function       init depth\r
  //                              -----------   ------------------  ----------\r
  UINT64                          Signature; // DriverBindingStart  0\r
  VIRTIO_DEVICE_PROTOCOL          *Virtio;   // DriverBindingStart  0\r
  VIRTIO_FS_LABEL                 Label;     // VirtioFsInit        1\r
  UINT16                          QueueSize; // VirtioFsInit        1\r
  VRING                           Ring;      // VirtioRingInit      2\r
  VOID                            *RingMap;  // VirtioRingMap       2\r
  UINT64                          RequestId; // FuseInitSession     1\r
  EFI_EVENT                       ExitBoot;  // DriverBindingStart  0\r
  LIST_ENTRY                      OpenFiles; // DriverBindingStart  0\r
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs;  // DriverBindingStart  0\r
} VIRTIO_FS;\r
\r
#define VIRTIO_FS_FROM_SIMPLE_FS(SimpleFsReference) \\r
  CR (SimpleFsReference, VIRTIO_FS, SimpleFs, VIRTIO_FS_SIG);\r
\r
//\r
// Structure for describing a contiguous buffer, potentially mapped for Virtio\r
// transfer.\r
//\r
typedef struct {\r
  //\r
  // The following fields originate from the owner of the buffer.\r
  //\r
  VOID  *Buffer;\r
  UINTN Size;\r
  //\r
  // All of the fields below, until the end of the structure, are\r
  // zero-initialized when the structure is initially validated.\r
  //\r
  // Mapped, MappedAddress and Mapping are updated when the buffer is mapped\r
  // for VirtioOperationBusMasterRead or VirtioOperationBusMasterWrite. They\r
  // are again updated when the buffer is unmapped.\r
  //\r
  BOOLEAN              Mapped;\r
  EFI_PHYSICAL_ADDRESS MappedAddress;\r
  VOID                 *Mapping;\r
  //\r
  // Transferred is updated after VirtioFlush() returns successfully:\r
  // - for VirtioOperationBusMasterRead, Transferred is set to Size;\r
  // - for VirtioOperationBusMasterWrite, Transferred is calculated from the\r
  //   UsedLen output parameter of VirtioFlush().\r
  //\r
  UINTN Transferred;\r
} VIRTIO_FS_IO_VECTOR;\r
\r
//\r
// Structure for describing a list of IO Vectors.\r
//\r
typedef struct {\r
  //\r
  // The following fields originate from the owner of the buffers.\r
  //\r
  VIRTIO_FS_IO_VECTOR *IoVec;\r
  UINTN               NumVec;\r
  //\r
  // TotalSize is calculated when the scatter-gather list is initially\r
  // validated.\r
  //\r
  UINT32 TotalSize;\r
} VIRTIO_FS_SCATTER_GATHER_LIST;\r
\r
//\r
// Private context structure that exposes EFI_FILE_PROTOCOL on top of an open\r
// FUSE file reference.\r
//\r
typedef struct {\r
  UINT64            Signature;\r
  EFI_FILE_PROTOCOL SimpleFile;\r
  BOOLEAN           IsDirectory;\r
  VIRTIO_FS         *OwnerFs;\r
  LIST_ENTRY        OpenFilesEntry;\r
  //\r
  // In the FUSE wire protocol, every request except FUSE_INIT refers to a\r
  // file, namely by the "VIRTIO_FS_FUSE_REQUEST.NodeId" field; that is, by the\r
  // inode number of the file. However, some of the FUSE requests that we need\r
  // for some of the EFI_FILE_PROTOCOL member functions require an open file\r
  // handle *in addition* to the inode number. For simplicity, whenever a\r
  // VIRTIO_FS_FILE object is created, primarily defined by its NodeId field,\r
  // we also *open* the referenced file at once, and save the returned file\r
  // handle in the FuseHandle field. This way, when an EFI_FILE_PROTOCOL member\r
  // function must send a FUSE request that needs the file handle *in addition*\r
  // to the inode number, FuseHandle will be at our disposal at once.\r
  //\r
  UINT64 NodeId;\r
  UINT64 FuseHandle;\r
} VIRTIO_FS_FILE;\r
\r
#define VIRTIO_FS_FILE_FROM_SIMPLE_FILE(SimpleFileReference) \\r
  CR (SimpleFileReference, VIRTIO_FS_FILE, SimpleFile, VIRTIO_FS_FILE_SIG);\r
\r
#define VIRTIO_FS_FILE_FROM_OPEN_FILES_ENTRY(OpenFilesEntryReference) \\r
  CR (OpenFilesEntryReference, VIRTIO_FS_FILE, OpenFilesEntry, \\r
    VIRTIO_FS_FILE_SIG);\r
\r
//\r
// Initialization and helper routines for the Virtio Filesystem device.\r
//\r
\r
EFI_STATUS\r
VirtioFsInit (\r
  IN OUT VIRTIO_FS *VirtioFs\r
  );\r
\r
VOID\r
VirtioFsUninit (\r
  IN OUT VIRTIO_FS *VirtioFs\r
  );\r
\r
VOID\r
EFIAPI\r
VirtioFsExitBoot (\r
  IN EFI_EVENT ExitBootEvent,\r
  IN VOID      *VirtioFsAsVoid\r
  );\r
\r
EFI_STATUS\r
VirtioFsSgListsValidate (\r
  IN     VIRTIO_FS                     *VirtioFs,\r
  IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *RequestSgList,\r
  IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList OPTIONAL\r
  );\r
\r
EFI_STATUS\r
VirtioFsSgListsSubmit (\r
  IN OUT VIRTIO_FS                     *VirtioFs,\r
  IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *RequestSgList,\r
  IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList OPTIONAL\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseNewRequest (\r
  IN OUT VIRTIO_FS              *VirtioFs,\r
     OUT VIRTIO_FS_FUSE_REQUEST *Request,\r
  IN     UINT32                 RequestSize,\r
  IN     VIRTIO_FS_FUSE_OPCODE  Opcode,\r
  IN     UINT64                 NodeId\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseCheckResponse (\r
  IN  VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList,\r
  IN  UINT64                        RequestId,\r
  OUT UINTN                         *TailBufferFill\r
  );\r
\r
EFI_STATUS\r
VirtioFsErrnoToEfiStatus (\r
  IN INT32 Errno\r
  );\r
\r
//\r
// Wrapper functions for FUSE commands (primitives).\r
//\r
\r
EFI_STATUS\r
VirtioFsFuseForget (\r
  IN OUT VIRTIO_FS *VirtioFs,\r
  IN     UINT64    NodeId\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseReleaseFileOrDir (\r
  IN OUT VIRTIO_FS *VirtioFs,\r
  IN     UINT64    NodeId,\r
  IN     UINT64    FuseHandle,\r
  IN     BOOLEAN   IsDir\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseFsyncFileOrDir (\r
  IN OUT VIRTIO_FS *VirtioFs,\r
  IN     UINT64    NodeId,\r
  IN     UINT64    FuseHandle,\r
  IN     BOOLEAN   IsDir\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseInitSession (\r
  IN OUT VIRTIO_FS *VirtioFs\r
  );\r
\r
EFI_STATUS\r
VirtioFsFuseOpenDir (\r
  IN OUT VIRTIO_FS *VirtioFs,\r
  IN     UINT64    NodeId,\r
     OUT UINT64    *FuseHandle\r
  );\r
\r
//\r
// EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member functions for the Virtio Filesystem\r
// driver.\r
//\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsOpenVolume (\r
  IN  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r
  OUT EFI_FILE_PROTOCOL               **Root\r
  );\r
\r
//\r
// EFI_FILE_PROTOCOL member functions for the Virtio Filesystem driver.\r
//\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileClose (\r
  IN EFI_FILE_PROTOCOL *This\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileDelete (\r
  IN EFI_FILE_PROTOCOL *This\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileFlush (\r
  IN EFI_FILE_PROTOCOL *This\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileGetInfo (\r
  IN     EFI_FILE_PROTOCOL *This,\r
  IN     EFI_GUID          *InformationType,\r
  IN OUT UINTN             *BufferSize,\r
     OUT VOID              *Buffer\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileGetPosition (\r
  IN     EFI_FILE_PROTOCOL *This,\r
     OUT UINT64            *Position\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileOpen (\r
  IN     EFI_FILE_PROTOCOL *This,\r
     OUT EFI_FILE_PROTOCOL **NewHandle,\r
  IN     CHAR16            *FileName,\r
  IN     UINT64            OpenMode,\r
  IN     UINT64            Attributes\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileRead (\r
  IN     EFI_FILE_PROTOCOL *This,\r
  IN OUT UINTN             *BufferSize,\r
     OUT VOID              *Buffer\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileSetInfo (\r
  IN EFI_FILE_PROTOCOL *This,\r
  IN EFI_GUID          *InformationType,\r
  IN UINTN             BufferSize,\r
  IN VOID              *Buffer\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileSetPosition (\r
  IN EFI_FILE_PROTOCOL *This,\r
  IN UINT64            Position\r
  );\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioFsSimpleFileWrite (\r
  IN     EFI_FILE_PROTOCOL *This,\r
  IN OUT UINTN             *BufferSize,\r
  IN     VOID              *Buffer\r
  );\r
\r
#endif // VIRTIO_FS_DXE_H_\r
Commit	Line	Data
b55d6622 LE	1	/** @file\r
	2	Internal macro definitions, type definitions, and function declarations for\r
	3	the Virtio Filesystem device driver.\r
	4	\r
	5	Copyright (C) 2020, Red Hat, Inc.\r
	6	\r
	7	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	8	**/\r
	9	\r
	10	#ifndef VIRTIO_FS_DXE_H_\r
	11	#define VIRTIO_FS_DXE_H_\r
	12	\r
	13	#include <Base.h> // SIGNATURE_64()\r
eaa7115d	14	#include <IndustryStandard/VirtioFs.h> // VIRTIO_FS_TAG_BYTES\r
b55d6622 LE	15	#include <Library/DebugLib.h> // CR()\r
	16	#include <Protocol/SimpleFileSystem.h> // EFI_SIMPLE_FILE_SYSTEM_PROTOCOL\r
	17	#include <Protocol/VirtioDevice.h> // VIRTIO_DEVICE_PROTOCOL\r
eaa7115d	18	#include <Uefi/UefiBaseType.h> // EFI_EVENT\r
b55d6622 LE	19	\r
	20	#define VIRTIO_FS_SIG SIGNATURE_64 ('V', 'I', 'R', 'T', 'I', 'O', 'F', 'S')\r
	21	\r
334c13e1 LE	22	#define VIRTIO_FS_FILE_SIG \\r
	23	SIGNATURE_64 ('V', 'I', 'O', 'F', 'S', 'F', 'I', 'L')\r
	24	\r
eaa7115d LE	25	//\r
	26	// Filesystem label encoded in UCS-2, transformed from the UTF-8 representation\r
	27	// in "VIRTIO_FS_CONFIG.Tag", and NUL-terminated. Only the printable ASCII code\r
	28	// points (U+0020 through U+007E) are supported.\r
	29	//\r
	30	typedef CHAR16 VIRTIO_FS_LABEL[VIRTIO_FS_TAG_BYTES + 1];\r
	31	\r
b55d6622 LE	32	//\r
	33	// Main context structure, expressing an EFI_SIMPLE_FILE_SYSTEM_PROTOCOL\r
	34	// interface on top of the Virtio Filesystem device.\r
	35	//\r
	36	typedef struct {\r
	37	//\r
	38	// Parts of this structure are initialized / torn down in various functions\r
	39	// at various call depths. The table to the right should make it easier to\r
	40	// track them.\r
	41	//\r
	42	// field init function init depth\r
	43	// ----------- ------------------ ----------\r
	44	UINT64 Signature; // DriverBindingStart 0\r
	45	VIRTIO_DEVICE_PROTOCOL *Virtio; // DriverBindingStart 0\r
eaa7115d LE	46	VIRTIO_FS_LABEL Label; // VirtioFsInit 1\r
	47	UINT16 QueueSize; // VirtioFsInit 1\r
	48	VRING Ring; // VirtioRingInit 2\r
	49	VOID *RingMap; // VirtioRingMap 2\r
fa97e372	50	UINT64 RequestId; // FuseInitSession 1\r
eaa7115d	51	EFI_EVENT ExitBoot; // DriverBindingStart 0\r
334c13e1	52	LIST_ENTRY OpenFiles; // DriverBindingStart 0\r
b55d6622 LE	53	EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs; // DriverBindingStart 0\r
	54	} VIRTIO_FS;\r
	55	\r
	56	#define VIRTIO_FS_FROM_SIMPLE_FS(SimpleFsReference) \\r
	57	CR (SimpleFsReference, VIRTIO_FS, SimpleFs, VIRTIO_FS_SIG);\r
	58	\r
6578cacb LE	59	//\r
	60	// Structure for describing a contiguous buffer, potentially mapped for Virtio\r
	61	// transfer.\r
	62	//\r
	63	typedef struct {\r
	64	//\r
	65	// The following fields originate from the owner of the buffer.\r
	66	//\r
	67	VOID *Buffer;\r
	68	UINTN Size;\r
	69	//\r
	70	// All of the fields below, until the end of the structure, are\r
	71	// zero-initialized when the structure is initially validated.\r
	72	//\r
	73	// Mapped, MappedAddress and Mapping are updated when the buffer is mapped\r
	74	// for VirtioOperationBusMasterRead or VirtioOperationBusMasterWrite. They\r
	75	// are again updated when the buffer is unmapped.\r
	76	//\r
	77	BOOLEAN Mapped;\r
	78	EFI_PHYSICAL_ADDRESS MappedAddress;\r
	79	VOID *Mapping;\r
	80	//\r
	81	// Transferred is updated after VirtioFlush() returns successfully:\r
	82	// - for VirtioOperationBusMasterRead, Transferred is set to Size;\r
	83	// - for VirtioOperationBusMasterWrite, Transferred is calculated from the\r
	84	// UsedLen output parameter of VirtioFlush().\r
	85	//\r
	86	UINTN Transferred;\r
	87	} VIRTIO_FS_IO_VECTOR;\r
	88	\r
	89	//\r
	90	// Structure for describing a list of IO Vectors.\r
	91	//\r
	92	typedef struct {\r
	93	//\r
	94	// The following fields originate from the owner of the buffers.\r
	95	//\r
	96	VIRTIO_FS_IO_VECTOR *IoVec;\r
	97	UINTN NumVec;\r
	98	//\r
	99	// TotalSize is calculated when the scatter-gather list is initially\r
	100	// validated.\r
	101	//\r
	102	UINT32 TotalSize;\r
	103	} VIRTIO_FS_SCATTER_GATHER_LIST;\r
	104	\r
334c13e1 LE	105	//\r
	106	// Private context structure that exposes EFI_FILE_PROTOCOL on top of an open\r
	107	// FUSE file reference.\r
	108	//\r
	109	typedef struct {\r
	110	UINT64 Signature;\r
	111	EFI_FILE_PROTOCOL SimpleFile;\r
	112	BOOLEAN IsDirectory;\r
	113	VIRTIO_FS *OwnerFs;\r
	114	LIST_ENTRY OpenFilesEntry;\r
	115	//\r
	116	// In the FUSE wire protocol, every request except FUSE_INIT refers to a\r
	117	// file, namely by the "VIRTIO_FS_FUSE_REQUEST.NodeId" field; that is, by the\r
	118	// inode number of the file. However, some of the FUSE requests that we need\r
	119	// for some of the EFI_FILE_PROTOCOL member functions require an open file\r
	120	// handle in addition to the inode number. For simplicity, whenever a\r
	121	// VIRTIO_FS_FILE object is created, primarily defined by its NodeId field,\r
	122	// we also open the referenced file at once, and save the returned file\r
	123	// handle in the FuseHandle field. This way, when an EFI_FILE_PROTOCOL member\r
	124	// function must send a FUSE request that needs the file handle in addition\r
	125	// to the inode number, FuseHandle will be at our disposal at once.\r
	126	//\r
	127	UINT64 NodeId;\r
	128	UINT64 FuseHandle;\r
	129	} VIRTIO_FS_FILE;\r
	130	\r
	131	#define VIRTIO_FS_FILE_FROM_SIMPLE_FILE(SimpleFileReference) \\r
	132	CR (SimpleFileReference, VIRTIO_FS_FILE, SimpleFile, VIRTIO_FS_FILE_SIG);\r
	133	\r
	134	#define VIRTIO_FS_FILE_FROM_OPEN_FILES_ENTRY(OpenFilesEntryReference) \\r
	135	CR (OpenFilesEntryReference, VIRTIO_FS_FILE, OpenFilesEntry, \\r
	136	VIRTIO_FS_FILE_SIG);\r
	137	\r
eaa7115d LE	138	//\r
	139	// Initialization and helper routines for the Virtio Filesystem device.\r
	140	//\r
	141	\r
	142	EFI_STATUS\r
	143	VirtioFsInit (\r
	144	IN OUT VIRTIO_FS *VirtioFs\r
	145	);\r
	146	\r
	147	VOID\r
	148	VirtioFsUninit (\r
	149	IN OUT VIRTIO_FS *VirtioFs\r
	150	);\r
	151	\r
	152	VOID\r
	153	EFIAPI\r
	154	VirtioFsExitBoot (\r
	155	IN EFI_EVENT ExitBootEvent,\r
	156	IN VOID *VirtioFsAsVoid\r
	157	);\r
	158	\r
6578cacb LE	159	EFI_STATUS\r
	160	VirtioFsSgListsValidate (\r
	161	IN VIRTIO_FS *VirtioFs,\r
	162	IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *RequestSgList,\r
	163	IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList OPTIONAL\r
	164	);\r
	165	\r
	166	EFI_STATUS\r
	167	VirtioFsSgListsSubmit (\r
	168	IN OUT VIRTIO_FS *VirtioFs,\r
	169	IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *RequestSgList,\r
	170	IN OUT VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList OPTIONAL\r
	171	);\r
	172	\r
6a2dc768 LE	173	EFI_STATUS\r
	174	VirtioFsFuseNewRequest (\r
	175	IN OUT VIRTIO_FS *VirtioFs,\r
	176	OUT VIRTIO_FS_FUSE_REQUEST *Request,\r
	177	IN UINT32 RequestSize,\r
fa97e372	178	IN VIRTIO_FS_FUSE_OPCODE Opcode,\r
6a2dc768 LE	179	IN UINT64 NodeId\r
	180	);\r
	181	\r
	182	EFI_STATUS\r
	183	VirtioFsFuseCheckResponse (\r
	184	IN VIRTIO_FS_SCATTER_GATHER_LIST *ResponseSgList,\r
	185	IN UINT64 RequestId,\r
	186	OUT UINTN *TailBufferFill\r
	187	);\r
	188	\r
e8a74c9a LE	189	EFI_STATUS\r
	190	VirtioFsErrnoToEfiStatus (\r
	191	IN INT32 Errno\r
	192	);\r
	193	\r
fa97e372 LE	194	//\r
	195	// Wrapper functions for FUSE commands (primitives).\r
	196	//\r
	197	\r
92a4d30e LE	198	EFI_STATUS\r
	199	VirtioFsFuseForget (\r
	200	IN OUT VIRTIO_FS *VirtioFs,\r
	201	IN UINT64 NodeId\r
	202	);\r
	203	\r
72d4f133 LE	204	EFI_STATUS\r
	205	VirtioFsFuseReleaseFileOrDir (\r
	206	IN OUT VIRTIO_FS *VirtioFs,\r
	207	IN UINT64 NodeId,\r
	208	IN UINT64 FuseHandle,\r
	209	IN BOOLEAN IsDir\r
	210	);\r
	211	\r
2e151d26 LE	212	EFI_STATUS\r
	213	VirtioFsFuseFsyncFileOrDir (\r
	214	IN OUT VIRTIO_FS *VirtioFs,\r
	215	IN UINT64 NodeId,\r
	216	IN UINT64 FuseHandle,\r
	217	IN BOOLEAN IsDir\r
	218	);\r
	219	\r
fa97e372 LE	220	EFI_STATUS\r
	221	VirtioFsFuseInitSession (\r
	222	IN OUT VIRTIO_FS *VirtioFs\r
	223	);\r
	224	\r
b62a0c56 LE	225	EFI_STATUS\r
	226	VirtioFsFuseOpenDir (\r
	227	IN OUT VIRTIO_FS *VirtioFs,\r
	228	IN UINT64 NodeId,\r
	229	OUT UINT64 *FuseHandle\r
	230	);\r
	231	\r
b55d6622 LE	232	//\r
	233	// EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member functions for the Virtio Filesystem\r
	234	// driver.\r
	235	//\r
	236	\r
	237	EFI_STATUS\r
	238	EFIAPI\r
	239	VirtioFsOpenVolume (\r
	240	IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r
	241	OUT EFI_FILE_PROTOCOL **Root\r
	242	);\r
	243	\r
334c13e1 LE	244	//\r
	245	// EFI_FILE_PROTOCOL member functions for the Virtio Filesystem driver.\r
	246	//\r
	247	\r
	248	EFI_STATUS\r
	249	EFIAPI\r
	250	VirtioFsSimpleFileClose (\r
	251	IN EFI_FILE_PROTOCOL *This\r
	252	);\r
	253	\r
	254	EFI_STATUS\r
	255	EFIAPI\r
	256	VirtioFsSimpleFileDelete (\r
	257	IN EFI_FILE_PROTOCOL *This\r
	258	);\r
	259	\r
	260	EFI_STATUS\r
	261	EFIAPI\r
	262	VirtioFsSimpleFileFlush (\r
	263	IN EFI_FILE_PROTOCOL *This\r
	264	);\r
	265	\r
	266	EFI_STATUS\r
	267	EFIAPI\r
	268	VirtioFsSimpleFileGetInfo (\r
	269	IN EFI_FILE_PROTOCOL *This,\r
	270	IN EFI_GUID *InformationType,\r
	271	IN OUT UINTN *BufferSize,\r
	272	OUT VOID *Buffer\r
	273	);\r
	274	\r
	275	EFI_STATUS\r
	276	EFIAPI\r
	277	VirtioFsSimpleFileGetPosition (\r
	278	IN EFI_FILE_PROTOCOL *This,\r
	279	OUT UINT64 *Position\r
	280	);\r
	281	\r
	282	EFI_STATUS\r
	283	EFIAPI\r
	284	VirtioFsSimpleFileOpen (\r
	285	IN EFI_FILE_PROTOCOL *This,\r
	286	OUT EFI_FILE_PROTOCOL **NewHandle,\r
	287	IN CHAR16 *FileName,\r
	288	IN UINT64 OpenMode,\r
	289	IN UINT64 Attributes\r
	290	);\r
	291	\r
	292	EFI_STATUS\r
	293	EFIAPI\r
	294	VirtioFsSimpleFileRead (\r
	295	IN EFI_FILE_PROTOCOL *This,\r
	296	IN OUT UINTN *BufferSize,\r
	297	OUT VOID *Buffer\r
	298	);\r
	299	\r
	300	EFI_STATUS\r
	301	EFIAPI\r
	302	VirtioFsSimpleFileSetInfo (\r
	303	IN EFI_FILE_PROTOCOL *This,\r
	304	IN EFI_GUID *InformationType,\r
	305	IN UINTN BufferSize,\r
	306	IN VOID *Buffer\r
	307	);\r
308	\r
309	EFI_STATUS\r
310	EFIAPI\r
311	VirtioFsSimpleFileSetPosition (\r
312	IN EFI_FILE_PROTOCOL *This,\r
313	IN UINT64 Position\r
314	);\r
315	\r
316	EFI_STATUS\r
317	EFIAPI\r
318	VirtioFsSimpleFileWrite (\r
319	IN EFI_FILE_PROTOCOL *This,\r
320	IN OUT UINTN *BufferSize,\r
321	IN VOID *Buffer\r
322	);\r
323	\r
b55d6622	324	#endif // VIRTIO_FS_DXE_H_\r