[edk2-devel] [edk2 PATCH 28/48] OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_STATFS
Laszlo Ersek
lersek at redhat.com
Wed Dec 16 21:11:05 UTC 2020
Add the VirtioFsFuseStatFs() function, for sending the FUSE_STATFS command
to the Virtio Filesystem device.
Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Philippe Mathieu-Daudé <philmd at redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
OvmfPkg/Include/IndustryStandard/VirtioFs.h | 17 ++++
OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 +
OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 7 ++
OvmfPkg/VirtioFsDxe/FuseStatFs.c | 102 ++++++++++++++++++++
4 files changed, 127 insertions(+)
diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
index efcf57941c59..800d3651e12b 100644
--- a/OvmfPkg/Include/IndustryStandard/VirtioFs.h
+++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h
@@ -114,16 +114,17 @@ typedef struct {
typedef enum {
VirtioFsFuseOpLookup = 1,
VirtioFsFuseOpForget = 2,
VirtioFsFuseOpGetAttr = 3,
VirtioFsFuseOpMkDir = 9,
VirtioFsFuseOpUnlink = 10,
VirtioFsFuseOpRmDir = 11,
VirtioFsFuseOpOpen = 14,
+ VirtioFsFuseOpStatFs = 17,
VirtioFsFuseOpRelease = 18,
VirtioFsFuseOpFsync = 20,
VirtioFsFuseOpFlush = 25,
VirtioFsFuseOpInit = 26,
VirtioFsFuseOpOpenDir = 27,
VirtioFsFuseOpReleaseDir = 29,
VirtioFsFuseOpFsyncDir = 30,
VirtioFsFuseOpCreate = 35,
@@ -228,16 +229,32 @@ typedef struct {
} VIRTIO_FS_FUSE_OPEN_REQUEST;
typedef struct {
UINT64 FileHandle;
UINT32 OpenFlags;
UINT32 Padding;
} VIRTIO_FS_FUSE_OPEN_RESPONSE;
+//
+// Header for VirtioFsFuseOpStatFs.
+//
+typedef struct {
+ UINT64 Blocks;
+ UINT64 Bfree;
+ UINT64 Bavail;
+ UINT64 Files;
+ UINT64 Ffree;
+ UINT32 Bsize;
+ UINT32 Namelen;
+ UINT32 Frsize;
+ UINT32 Padding;
+ UINT32 Spare[6];
+} VIRTIO_FS_FUSE_STATFS_RESPONSE;
+
//
// Header for VirtioFsFuseOpRelease and VirtioFsFuseOpReleaseDir.
//
typedef struct {
UINT64 FileHandle;
UINT32 Flags;
UINT32 ReleaseFlags;
UINT64 LockOwner;
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
index 233c0c5c0f9a..318449db3e63 100644
--- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
+++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
@@ -89,16 +89,17 @@ [Sources]
FuseGetAttr.c
FuseInit.c
FuseLookup.c
FuseMkDir.c
FuseOpen.c
FuseOpenDir.c
FuseOpenOrCreate.c
FuseRelease.c
+ FuseStatFs.c
FuseUnlink.c
Helpers.c
SimpleFsClose.c
SimpleFsDelete.c
SimpleFsFlush.c
SimpleFsGetInfo.c
SimpleFsGetPosition.c
SimpleFsOpen.c
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h
index 3bf64c0146fa..029c568b39c7 100644
--- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h
+++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h
@@ -285,16 +285,23 @@ VirtioFsFuseRemoveFileOrDir (
EFI_STATUS
VirtioFsFuseOpen (
IN OUT VIRTIO_FS *VirtioFs,
IN UINT64 NodeId,
IN BOOLEAN ReadWrite,
OUT UINT64 *FuseHandle
);
+EFI_STATUS
+VirtioFsFuseStatFs (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT VIRTIO_FS_FUSE_STATFS_RESPONSE *FilesysAttr
+ );
+
EFI_STATUS
VirtioFsFuseReleaseFileOrDir (
IN OUT VIRTIO_FS *VirtioFs,
IN UINT64 NodeId,
IN UINT64 FuseHandle,
IN BOOLEAN IsDir
);
diff --git a/OvmfPkg/VirtioFsDxe/FuseStatFs.c b/OvmfPkg/VirtioFsDxe/FuseStatFs.c
new file mode 100644
index 000000000000..e794f8977a48
--- /dev/null
+++ b/OvmfPkg/VirtioFsDxe/FuseStatFs.c
@@ -0,0 +1,102 @@
+/** @file
+ FUSE_STATFS wrapper for the Virtio Filesystem device.
+
+ Copyright (C) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "VirtioFsDxe.h"
+
+/**
+ Send the FUSE_STATFS request to the Virtio Filesysem device, for retrieving
+ the attributes of the host-side filesystem that contains NodeId.
+
+ The function may only be called after VirtioFsFuseInitSession() returns
+ successfully and before VirtioFsUninit() is called.
+
+ @param[in,out] VirtioFs The Virtio Filesystem device to send the FUSE_STATFS
+ request to. On output, the FUSE request counter
+ "VirtioFs->RequestId" will have been incremented.
+
+ @param[in] NodeId The inode whose containing filesystem is to be
+ queried for its attributes.
+
+ @param[out] FilesysAttr The VIRTIO_FS_FUSE_STATFS_RESPONSE object describing
+ the filesystem that underlies NodeId.
+
+ @retval EFI_SUCCESS FilesysAttr has been filled in.
+
+ @return The "errno" value mapped to an EFI_STATUS code, if the
+ Virtio Filesystem device explicitly reported an error.
+
+ @return Error codes propagated from VirtioFsSgListsValidate(),
+ VirtioFsFuseNewRequest(), VirtioFsSgListsSubmit(),
+ VirtioFsFuseCheckResponse().
+**/
+EFI_STATUS
+VirtioFsFuseStatFs (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT VIRTIO_FS_FUSE_STATFS_RESPONSE *FilesysAttr
+ )
+{
+ VIRTIO_FS_FUSE_REQUEST CommonReq;
+ VIRTIO_FS_IO_VECTOR ReqIoVec[1];
+ VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;
+ VIRTIO_FS_FUSE_RESPONSE CommonResp;
+ VIRTIO_FS_IO_VECTOR RespIoVec[2];
+ VIRTIO_FS_SCATTER_GATHER_LIST RespSgList;
+ EFI_STATUS Status;
+
+ //
+ // Set up the scatter-gather lists.
+ //
+ ReqIoVec[0].Buffer = &CommonReq;
+ ReqIoVec[0].Size = sizeof CommonReq;
+ ReqSgList.IoVec = ReqIoVec;
+ ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);
+
+ RespIoVec[0].Buffer = &CommonResp;
+ RespIoVec[0].Size = sizeof CommonResp;
+ RespIoVec[1].Buffer = FilesysAttr;
+ RespIoVec[1].Size = sizeof *FilesysAttr;
+ RespSgList.IoVec = RespIoVec;
+ RespSgList.NumVec = ARRAY_SIZE (RespIoVec);
+
+ //
+ // Validate the scatter-gather lists; calculate the total transfer sizes.
+ //
+ Status = VirtioFsSgListsValidate (VirtioFs, &ReqSgList, &RespSgList);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Populate the common request header.
+ //
+ Status = VirtioFsFuseNewRequest (VirtioFs, &CommonReq, ReqSgList.TotalSize,
+ VirtioFsFuseOpStatFs, NodeId);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Submit the request.
+ //
+ Status = VirtioFsSgListsSubmit (VirtioFs, &ReqSgList, &RespSgList);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Verify the response (all response buffers are fixed size).
+ //
+ Status = VirtioFsFuseCheckResponse (&RespSgList, CommonReq.Unique, NULL);
+ if (Status == EFI_DEVICE_ERROR) {
+ DEBUG ((DEBUG_ERROR, "%a: Label=\"%s\" NodeId=%Lu Errno=%d\n",
+ __FUNCTION__, VirtioFs->Label, NodeId, CommonResp.Error));
+ Status = VirtioFsErrnoToEfiStatus (CommonResp.Error);
+ }
+ return Status;
+}
--
2.19.1.3.g30247aa5d201
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