From 647340b0ce763dd8be196fca6499e3ec50da01bd Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Wed, 16 Dec 2020 22:11:21 +0100 Subject: OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_SETATTR MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add the VirtioFsFuseSetAttr() function, for sending the FUSE_SETATTR 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: <20201216211125.19496-45-lersek@redhat.com> Acked-by: Ard Biesheuvel --- OvmfPkg/Include/IndustryStandard/VirtioFs.h | 35 +++++- OvmfPkg/VirtioFsDxe/FuseSetAttr.c | 174 ++++++++++++++++++++++++++++ OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 10 ++ OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 + 4 files changed, 219 insertions(+), 1 deletion(-) create mode 100644 OvmfPkg/VirtioFsDxe/FuseSetAttr.c (limited to 'OvmfPkg') diff --git a/OvmfPkg/Include/IndustryStandard/VirtioFs.h b/OvmfPkg/Include/IndustryStandard/VirtioFs.h index 0b2ed70100..15fb28f95a 100644 --- a/OvmfPkg/Include/IndustryStandard/VirtioFs.h +++ b/OvmfPkg/Include/IndustryStandard/VirtioFs.h @@ -102,6 +102,15 @@ typedef struct { #define VIRTIO_FS_FUSE_MODE_PERM_ROTH 0000004u #define VIRTIO_FS_FUSE_MODE_PERM_WOTH 0000002u +// +// Flags for VirtioFsFuseOpSetAttr, in the VIRTIO_FS_FUSE_SETATTR_REQUEST.Valid +// field. +// +#define VIRTIO_FS_FUSE_SETATTR_REQ_F_MODE BIT0 +#define VIRTIO_FS_FUSE_SETATTR_REQ_F_SIZE BIT3 +#define VIRTIO_FS_FUSE_SETATTR_REQ_F_ATIME BIT4 +#define VIRTIO_FS_FUSE_SETATTR_REQ_F_MTIME BIT5 + // // Flags for VirtioFsFuseOpOpen. // @@ -153,6 +162,7 @@ typedef enum { VirtioFsFuseOpLookup = 1, VirtioFsFuseOpForget = 2, VirtioFsFuseOpGetAttr = 3, + VirtioFsFuseOpSetAttr = 4, VirtioFsFuseOpMkDir = 9, VirtioFsFuseOpUnlink = 10, VirtioFsFuseOpRmDir = 11, @@ -240,7 +250,8 @@ typedef struct { } VIRTIO_FS_FUSE_FORGET_REQUEST; // -// Headers for VirtioFsFuseOpGetAttr. +// Headers for VirtioFsFuseOpGetAttr (VIRTIO_FS_FUSE_GETATTR_RESPONSE is also +// for VirtioFsFuseOpSetAttr). // typedef struct { UINT32 GetAttrFlags; @@ -254,6 +265,28 @@ typedef struct { UINT32 Dummy; } VIRTIO_FS_FUSE_GETATTR_RESPONSE; +// +// Header for VirtioFsFuseOpSetAttr. +// +typedef struct { + UINT32 Valid; + UINT32 Padding; + UINT64 FileHandle; + UINT64 Size; + UINT64 LockOwner; + UINT64 Atime; + UINT64 Mtime; + UINT64 Ctime; + UINT32 AtimeNsec; + UINT32 MtimeNsec; + UINT32 CtimeNsec; + UINT32 Mode; + UINT32 Unused4; + UINT32 Uid; + UINT32 Gid; + UINT32 Unused5; +} VIRTIO_FS_FUSE_SETATTR_REQUEST; + // // Header for VirtioFsFuseOpMkDir. // diff --git a/OvmfPkg/VirtioFsDxe/FuseSetAttr.c b/OvmfPkg/VirtioFsDxe/FuseSetAttr.c new file mode 100644 index 0000000000..dcd0141720 --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/FuseSetAttr.c @@ -0,0 +1,174 @@ +/** @file + FUSE_SETATTR 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_SETATTR request to the Virtio Filesystem device, for changing + 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_SETATTR request to. On output, the FUSE request + counter "VirtioFs->RequestId" will have been + incremented. + + @param[in] NodeId The inode number representing the regular file or + directory whose attributes should be changed. + + @param[in] Size The new size to set for the regular file. If NULL, + then the file size will not be changed. If NodeId + refers to a directory, then the caller is + responsible for passing NULL as Size. + + @param[in] Atime The new last access time to set for the regular file + or directory (seconds since the Epoch). If NULL, + then the last access time is not changed. + + @param[in] Mtime The new last modification time to set for the + regular file or directory (seconds since the Epoch). + If NULL, then the last modification time is not + changed. + + @param[in] Mode The new file mode bits to set for the regular file + or directory. If NULL, then the file mode bits are + not changed. + + @retval EFI_SUCCESS The attributes have been updated. + + @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 +VirtioFsFuseSetAttr ( + IN OUT VIRTIO_FS *VirtioFs, + IN UINT64 NodeId, + IN UINT64 *Size OPTIONAL, + IN UINT64 *Atime OPTIONAL, + IN UINT64 *Mtime OPTIONAL, + IN UINT32 *Mode OPTIONAL + ) +{ + VIRTIO_FS_FUSE_REQUEST CommonReq; + VIRTIO_FS_FUSE_SETATTR_REQUEST AttrReq; + 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_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 = &AttrReq; + ReqIoVec[1].Size = sizeof AttrReq; + 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 = &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, + VirtioFsFuseOpSetAttr, NodeId); + if (EFI_ERROR (Status)) { + return Status; + } + + // + // Populate the FUSE_SETATTR-specific fields. + // + AttrReq.Valid = 0; + AttrReq.Padding = 0; + AttrReq.FileHandle = 0; + AttrReq.Size = (Size == NULL) ? 0 : *Size; + AttrReq.LockOwner = 0; + AttrReq.Atime = (Atime == NULL) ? 0 : *Atime; + AttrReq.Mtime = (Mtime == NULL) ? 0 : *Mtime; + AttrReq.Ctime = 0; + AttrReq.AtimeNsec = 0; + AttrReq.MtimeNsec = 0; + AttrReq.CtimeNsec = 0; + AttrReq.Mode = (Mode == NULL) ? 0 : *Mode; + AttrReq.Unused4 = 0; + AttrReq.Uid = 0; + AttrReq.Gid = 0; + AttrReq.Unused5 = 0; + + if (Size != NULL) { + AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_SIZE; + } + if (Atime != NULL) { + AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_ATIME; + } + if (Mtime != NULL) { + AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_MTIME; + } + if (Mode != NULL) { + AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_MODE; + } + + // + // 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", __FUNCTION__, + VirtioFs->Label, NodeId)); + if (Size != NULL) { + DEBUG ((DEBUG_ERROR, " Size=0x%Lx", *Size)); + } + if (Atime != NULL) { + DEBUG ((DEBUG_ERROR, " Atime=%Lu", *Atime)); + } + if (Mtime != NULL) { + DEBUG ((DEBUG_ERROR, " Mtime=%Lu", *Mtime)); + } + if (Mode != NULL) { + DEBUG ((DEBUG_ERROR, " Mode=0x%x", *Mode)); // no support for octal :/ + } + DEBUG ((DEBUG_ERROR, " Errno=%d\n", CommonResp.Error)); + Status = VirtioFsErrnoToEfiStatus (CommonResp.Error); + } + return Status; +} diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index a6dfac71f4..9e6348f938 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -308,6 +308,16 @@ VirtioFsFuseGetAttr ( OUT VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE *FuseAttr ); +EFI_STATUS +VirtioFsFuseSetAttr ( + IN OUT VIRTIO_FS *VirtioFs, + IN UINT64 NodeId, + IN UINT64 *Size OPTIONAL, + IN UINT64 *Atime OPTIONAL, + IN UINT64 *Mtime OPTIONAL, + IN UINT32 *Mode OPTIONAL + ); + EFI_STATUS VirtioFsFuseMkDir ( IN OUT VIRTIO_FS *VirtioFs, diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index 9dccd7d6a9..8d962bcdc1 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -96,6 +96,7 @@ FuseRead.c FuseRelease.c FuseRename.c + FuseSetAttr.c FuseStatFs.c FuseUnlink.c FuseWrite.c -- cgit v1.2.3