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- /** @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;
- }
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