From f058cb69d14439a2f1c5d57f9f2bd278fb080423 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Wed, 16 Dec 2020 22:10:56 +0100 Subject: OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_MKDIR MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add the VirtioFsFuseMkDir() function, for sending the FUSE_MKDIR command to the Virtio Filesystem device. Cc: Ard Biesheuvel Cc: Jordan Justen Cc: Philippe Mathieu-Daudé Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097 Signed-off-by: Laszlo Ersek Message-Id: <20201216211125.19496-20-lersek@redhat.com> Acked-by: Ard Biesheuvel --- OvmfPkg/VirtioFsDxe/FuseMkDir.c | 134 ++++++++++++++++++++++++++++++++++++ OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 8 +++ OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 + 3 files changed, 143 insertions(+) create mode 100644 OvmfPkg/VirtioFsDxe/FuseMkDir.c (limited to 'OvmfPkg/VirtioFsDxe') diff --git a/OvmfPkg/VirtioFsDxe/FuseMkDir.c b/OvmfPkg/VirtioFsDxe/FuseMkDir.c new file mode 100644 index 0000000000..541ff330cd --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/FuseMkDir.c @@ -0,0 +1,134 @@ +/** @file + FUSE_MKDIR wrapper for the Virtio Filesystem device. + + Copyright (C) 2020, Red Hat, Inc. + + SPDX-License-Identifier: BSD-2-Clause-Patent +**/ + +#include // AsciiStrSize() + +#include "VirtioFsDxe.h" + +/** + Send a FUSE_MKDIR request to the Virtio Filesystem device, for creating 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_MKDIR + request to. On output, the FUSE request counter + "VirtioFs->RequestId" will have been incremented. + + @param[in] ParentNodeId The inode number of the direct parent directory of + the directory to create. + + @param[in] Name The single-component filename of the directory to + create, under the parent directory identified by + ParentNodeId. + + @param[out] NodeId The inode number of the new directory. + + @retval EFI_SUCCESS The directory has been created. + + @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 +VirtioFsFuseMkDir ( + IN OUT VIRTIO_FS *VirtioFs, + IN UINT64 ParentNodeId, + IN CHAR8 *Name, + OUT UINT64 *NodeId + ) +{ + VIRTIO_FS_FUSE_REQUEST CommonReq; + VIRTIO_FS_FUSE_MKDIR_REQUEST MkDirReq; + VIRTIO_FS_IO_VECTOR ReqIoVec[3]; + VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList; + VIRTIO_FS_FUSE_RESPONSE CommonResp; + VIRTIO_FS_FUSE_NODE_RESPONSE NodeResp; + VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE AttrResp; + 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 = &MkDirReq; + ReqIoVec[1].Size = sizeof MkDirReq; + ReqIoVec[2].Buffer = Name; + ReqIoVec[2].Size = AsciiStrSize (Name); + ReqSgList.IoVec = ReqIoVec; + ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec); + + RespIoVec[0].Buffer = &CommonResp; + RespIoVec[0].Size = sizeof CommonResp; + RespIoVec[1].Buffer = &NodeResp; + RespIoVec[1].Size = sizeof NodeResp; + RespIoVec[2].Buffer = &AttrResp; + RespIoVec[2].Size = sizeof AttrResp; + 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, + VirtioFsFuseOpMkDir, ParentNodeId); + if (EFI_ERROR (Status)) { + return Status; + } + + // + // Populate the FUSE_MKDIR-specific fields. + // + MkDirReq.Mode = (VIRTIO_FS_FUSE_MODE_PERM_RWXU | + VIRTIO_FS_FUSE_MODE_PERM_RWXG | + VIRTIO_FS_FUSE_MODE_PERM_RWXO); + MkDirReq.Umask = 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\" ParentNodeId=%Lu Name=\"%a\" " + "Errno=%d\n", __FUNCTION__, VirtioFs->Label, ParentNodeId, Name, + CommonResp.Error)); + Status = VirtioFsErrnoToEfiStatus (CommonResp.Error); + } + return Status; + } + + // + // Output the NodeId of the new directory. + // + *NodeId = NodeResp.NodeId; + return EFI_SUCCESS; +} diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index c13258a2e0..8fd56bdbf6 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -235,6 +235,14 @@ VirtioFsFuseForget ( IN UINT64 NodeId ); +EFI_STATUS +VirtioFsFuseMkDir ( + IN OUT VIRTIO_FS *VirtioFs, + IN UINT64 ParentNodeId, + IN CHAR8 *Name, + OUT UINT64 *NodeId + ); + EFI_STATUS VirtioFsFuseOpen ( IN OUT VIRTIO_FS *VirtioFs, diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index dc9a12820f..eebb86f7c2 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -86,6 +86,7 @@ FuseForget.c FuseFsync.c FuseInit.c + FuseMkDir.c FuseOpen.c FuseOpenDir.c FuseRelease.c -- cgit v1.2.3