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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c b/src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c new file mode 100644 index 00000000..04c369a5 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/OvmfPkg/VirtioFsDxe/FuseOpen.c @@ -0,0 +1,126 @@ +/** @file + FUSE_OPEN 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_OPEN request to the Virtio Filesystem device, for opening a + regular file. + + 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_OPEN + request to. On output, the FUSE request counter + "VirtioFs->RequestId" will have been incremented. + + @param[in] NodeId The inode number of the regular file to open. + + @param[in] ReadWrite If TRUE, open the regular file in read-write mode. + If FALSE, open the regular file in read-only mode. + + @param[out] FuseHandle The open handle to the regular file, returned by the + Virtio Filesystem device. + + @retval EFI_SUCCESS The regular file 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 +VirtioFsFuseOpen ( + IN OUT VIRTIO_FS *VirtioFs, + IN UINT64 NodeId, + IN BOOLEAN ReadWrite, + 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, + VirtioFsFuseOpOpen, NodeId); + if (EFI_ERROR (Status)) { + return Status; + } + + // + // Populate the FUSE_OPEN-specific fields. + // + OpenReq.Flags = (ReadWrite ? + VIRTIO_FS_FUSE_OPEN_REQ_F_RDWR : + VIRTIO_FS_FUSE_OPEN_REQ_F_RDONLY); + 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 ReadWrite=%d " + "Errno=%d\n", __FUNCTION__, VirtioFs->Label, NodeId, ReadWrite, + CommonResp.Error)); + Status = VirtioFsErrnoToEfiStatus (CommonResp.Error); + } + return Status; + } + + // + // Output the open handle. + // + *FuseHandle = OpenResp.FileHandle; + return EFI_SUCCESS; +} |