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| author | Laszlo Ersek <lersek@redhat.com> | 2020-12-16 22:10:46 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-12-21 17:16:23 +0000 |
| commit | b62a0c5603da1445682678b49d9c45230cf7af3c (patch) | |
| tree | e8a67d01625892335b1fc8d9a3d355438640ac48 /OvmfPkg/VirtioFsDxe | |
| parent | fa97e3728210fbb5963ac91fafdadd6f83dc1226 (diff) | |
| download | edk2-b62a0c5603da1445682678b49d9c45230cf7af3c.tar.gz edk2-b62a0c5603da1445682678b49d9c45230cf7af3c.tar.bz2 edk2-b62a0c5603da1445682678b49d9c45230cf7af3c.zip | |
OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_OPENDIR
Add the VirtioFsFuseOpenDir() function, for sending the FUSE_OPENDIR
command to the Virtio Filesystem device.
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201216211125.19496-10-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Diffstat (limited to 'OvmfPkg/VirtioFsDxe')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/FuseOpenDir.c | 120 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 7 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 |
3 files changed, 128 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioFsDxe/FuseOpenDir.c b/OvmfPkg/VirtioFsDxe/FuseOpenDir.c new file mode 100644 index 0000000000..eef522693c --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/FuseOpenDir.c @@ -0,0 +1,120 @@ +/** @file
+ FUSE_OPENDIR 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_OPENDIR request to the Virtio Filesystem device, for opening a
+ directory.
+
+ 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_OPENDIR request to. On output, the FUSE request
+ counter "VirtioFs->RequestId" will have been
+ incremented.
+
+ @param[in] NodeId The inode number of the directory to open.
+
+ @param[out] FuseHandle The open file handle returned by the Virtio
+ Filesystem device.
+
+ @retval EFI_SUCCESS The directory has been opened.
+
+ @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
+VirtioFsFuseOpenDir (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT UINT64 *FuseHandle
+ )
+{
+ VIRTIO_FS_FUSE_REQUEST CommonReq;
+ VIRTIO_FS_FUSE_OPEN_REQUEST OpenReq;
+ VIRTIO_FS_IO_VECTOR ReqIoVec[2];
+ VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;
+ VIRTIO_FS_FUSE_RESPONSE CommonResp;
+ VIRTIO_FS_FUSE_OPEN_RESPONSE OpenResp;
+ 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;
+ ReqIoVec[1].Buffer = &OpenReq;
+ ReqIoVec[1].Size = sizeof OpenReq;
+ ReqSgList.IoVec = ReqIoVec;
+ ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);
+
+ RespIoVec[0].Buffer = &CommonResp;
+ RespIoVec[0].Size = sizeof CommonResp;
+ RespIoVec[1].Buffer = &OpenResp;
+ RespIoVec[1].Size = sizeof OpenResp;
+ 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,
+ VirtioFsFuseOpOpenDir, NodeId);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Populate the FUSE_OPENDIR-specific fields.
+ //
+ OpenReq.Flags = 0;
+ OpenReq.Unused = 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 (EFI_ERROR (Status)) {
+ 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;
+ }
+
+ //
+ // Output the open file handle.
+ //
+ *FuseHandle = OpenResp.FileHandle;
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index b8d4640118..9c47454435 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -163,6 +163,13 @@ VirtioFsFuseInitSession ( IN OUT VIRTIO_FS *VirtioFs
);
+EFI_STATUS
+VirtioFsFuseOpenDir (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ OUT UINT64 *FuseHandle
+ );
+
//
// EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member functions for the Virtio Filesystem
// driver.
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index 8fddc50318..051acbdd71 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -83,6 +83,7 @@ [Sources]
DriverBinding.c
FuseInit.c
+ FuseOpenDir.c
Helpers.c
SimpleFsOpenVolume.c
VirtioFsDxe.h
|