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| author | Laszlo Ersek <lersek@redhat.com> | 2020-12-16 22:10:51 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-12-21 17:16:23 +0000 |
| commit | d0474399521789646ebc66b3450a4983d6fd07d9 (patch) | |
| tree | 23f8530dcb7c5fd4d1174cb4aff0db7d7c6b89bb /OvmfPkg/VirtioFsDxe | |
| parent | 2e151d26ca83d8f2d2cdd22e14bdf95c212937c1 (diff) | |
| download | edk2-d0474399521789646ebc66b3450a4983d6fd07d9.tar.gz edk2-d0474399521789646ebc66b3450a4983d6fd07d9.tar.bz2 edk2-d0474399521789646ebc66b3450a4983d6fd07d9.zip | |
OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_FLUSH
Add the VirtioFsFuseFlush() function, for sending the FUSE_FLUSH 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: <20201216211125.19496-15-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Diffstat (limited to 'OvmfPkg/VirtioFsDxe')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/FuseFlush.c | 111 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 7 | ||||
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf | 1 |
3 files changed, 119 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioFsDxe/FuseFlush.c b/OvmfPkg/VirtioFsDxe/FuseFlush.c new file mode 100644 index 0000000000..b689ad3291 --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/FuseFlush.c @@ -0,0 +1,111 @@ +/** @file
+ FUSE_FLUSH wrapper for the Virtio Filesystem device.
+
+ Copyright (C) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "VirtioFsDxe.h"
+
+/**
+ Flush changes queued on the local virtualization host to the remote storage
+ server's memory (not storage device), over the network, by sending the
+ FUSE_FLUSH request to the Virtio Filesystem device.
+
+ 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_FLUSH
+ 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 flush.
+
+ @param[in] FuseHandle The open handle to the regular file to flush.
+
+ @retval EFI_SUCCESS The regular file has been flushed.
+
+ @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
+VirtioFsFuseFlush (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ IN UINT64 FuseHandle
+ )
+{
+ VIRTIO_FS_FUSE_REQUEST CommonReq;
+ VIRTIO_FS_FUSE_FLUSH_REQUEST FlushReq;
+ VIRTIO_FS_IO_VECTOR ReqIoVec[2];
+ VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;
+ VIRTIO_FS_FUSE_RESPONSE CommonResp;
+ VIRTIO_FS_IO_VECTOR RespIoVec[1];
+ 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 = &FlushReq;
+ ReqIoVec[1].Size = sizeof FlushReq;
+ ReqSgList.IoVec = ReqIoVec;
+ ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);
+
+ RespIoVec[0].Buffer = &CommonResp;
+ RespIoVec[0].Size = sizeof CommonResp;
+ 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,
+ VirtioFsFuseOpFlush, NodeId);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Populate the FUSE_FLUSH-specific fields.
+ //
+ FlushReq.FileHandle = FuseHandle;
+ FlushReq.Unused = 0;
+ FlushReq.Padding = 0;
+ FlushReq.LockOwner = 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 FuseHandle=%Lu "
+ "Errno=%d\n", __FUNCTION__, VirtioFs->Label, NodeId, FuseHandle,
+ CommonResp.Error));
+ Status = VirtioFsErrnoToEfiStatus (CommonResp.Error);
+ }
+ return Status;
+}
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h index ac1fb89654..7151a62bb4 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -218,6 +218,13 @@ VirtioFsFuseFsyncFileOrDir ( );
EFI_STATUS
+VirtioFsFuseFlush (
+ IN OUT VIRTIO_FS *VirtioFs,
+ IN UINT64 NodeId,
+ IN UINT64 FuseHandle
+ );
+
+EFI_STATUS
VirtioFsFuseInitSession (
IN OUT VIRTIO_FS *VirtioFs
);
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf index 839660a0f9..15e21772c8 100644 --- a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf @@ -82,6 +82,7 @@ [Sources]
DriverBinding.c
+ FuseFlush.c
FuseForget.c
FuseFsync.c
FuseInit.c
|