diff options
| -rw-r--r-- | OvmfPkg/Include/IndustryStandard/VirtioFs.h | 16 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/FuseGetAttr.c | 116 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 7 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 |
4 files changed, 140 insertions, 0 deletions
diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h index f49452830a..efcf57941c 100644 --- a/OvmfPkg/Include/IndustryStandard/VirtioFs.h +++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h @@ -114,6 +114,7 @@ typedef struct { typedef enum {
VirtioFsFuseOpLookup = 1,
VirtioFsFuseOpForget = 2,
+ VirtioFsFuseOpGetAttr = 3,
VirtioFsFuseOpMkDir = 9,
VirtioFsFuseOpUnlink = 10,
VirtioFsFuseOpRmDir = 11,
@@ -196,6 +197,21 @@ typedef struct { } VIRTIO_FS_FUSE_FORGET_REQUEST;
//
+// Headers for VirtioFsFuseOpGetAttr.
+//
+typedef struct {
+ UINT32 GetAttrFlags;
+ UINT32 Dummy;
+ UINT64 FileHandle;
+} VIRTIO_FS_FUSE_GETATTR_REQUEST;
+
+typedef struct {
+ UINT64 AttrValid;
+ UINT32 AttrValidNsec;
+ UINT32 Dummy;
+} VIRTIO_FS_FUSE_GETATTR_RESPONSE;
+
+//
// Header for VirtioFsFuseOpMkDir.
//
typedef struct {
diff --git a/OvmfPkg/VirtioFsDxe/FuseGetAttr.c b/OvmfPkg/VirtioFsDxe/FuseGetAttr.c new file mode 100644 index 0000000000..29d8ec8190 --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/FuseGetAttr.c @@ -0,0 +1,116 @@ +/** @file
+ FUSE_GETATTR wrapper for the Virtio Filesystem device.
+
+ Copyright (C) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "VirtioFsDxe.h"
+
+/**
+ Send a FUSE_GETATTR request to the Virtio Filesystem device, for fetching the
+ attributes of an inode.
+
+ 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_GETATTR request to. On output, the FUSE request
+ counter "VirtioFs->RequestId" will have been
+ incremented.
+
+ @param[in] NodeId The inode number for which the attributes should be
+ retrieved.
+
+ @param[out] FuseAttr The VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE object
+ describing the properties of the inode.
+
+ @retval EFI_SUCCESS FuseAttr 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
+VirtioFsFuseGetAttr (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE *FuseAttr
+ )
+{
+ VIRTIO_FS_FUSE_REQUEST CommonReq;
+ VIRTIO_FS_FUSE_GETATTR_REQUEST GetAttrReq;
+ VIRTIO_FS_IO_VECTOR ReqIoVec[2];
+ VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;
+ VIRTIO_FS_FUSE_RESPONSE CommonResp;
+ VIRTIO_FS_FUSE_GETATTR_RESPONSE GetAttrResp;
+ VIRTIO_FS_IO_VECTOR RespIoVec[3];
+ VIRTIO_FS_SCATTER_GATHER_LIST RespSgList;
+ EFI_STATUS Status;
+
+ //
+ // Set up the scatter-gather lists.
+ //
+ ReqIoVec[0].Buffer = &CommonReq;
+ ReqIoVec[0].Size = sizeof CommonReq;
+ ReqIoVec[1].Buffer = &GetAttrReq;
+ ReqIoVec[1].Size = sizeof GetAttrReq;
+ ReqSgList.IoVec = ReqIoVec;
+ ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);
+
+ RespIoVec[0].Buffer = &CommonResp;
+ RespIoVec[0].Size = sizeof CommonResp;
+ RespIoVec[1].Buffer = &GetAttrResp;
+ RespIoVec[1].Size = sizeof GetAttrResp;
+ RespIoVec[2].Buffer = FuseAttr;
+ RespIoVec[2].Size = sizeof *FuseAttr;
+ 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,
+ VirtioFsFuseOpGetAttr, NodeId);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Populate the FUSE_GETATTR-specific fields.
+ //
+ GetAttrReq.GetAttrFlags = 0;
+ GetAttrReq.Dummy = 0;
+ GetAttrReq.FileHandle = 0;
+
+ //
+ // 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;
+}
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index 0e4f2109eb..3bf64c0146 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -260,6 +260,13 @@ VirtioFsFuseForget ( );
EFI_STATUS
+VirtioFsFuseGetAttr (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE *FuseAttr
+ );
+
+EFI_STATUS
VirtioFsFuseMkDir (
IN OUT VIRTIO_FS *VirtioFs,
IN UINT64 ParentNodeId,
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index 2332aa3ee5..233c0c5c0f 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -86,6 +86,7 @@ FuseFlush.c
FuseForget.c
FuseFsync.c
+ FuseGetAttr.c
FuseInit.c
FuseLookup.c
FuseMkDir.c
|