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dll: fuse_intf: Write implementation

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This commit is contained in:
Bill Zissimopoulos 2016-06-10 23:36:19 -07:00
parent 2aa683177e
commit beeae73c79
1 changed files with 57 additions and 1 deletions
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58
src/dll/fuse/fuse_intf.c
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@ -718,7 +718,63 @@ static NTSTATUS fsp_fuse_intf_Write(FSP_FILE_SYSTEM *FileSystem,
BOOLEAN WriteToEndOfFile, BOOLEAN ConstrainedIo, BOOLEAN WriteToEndOfFile, BOOLEAN ConstrainedIo,
PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo) PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo)
{ {
return STATUS_INVALID_DEVICE_REQUEST; struct fuse *f = FileSystem->UserContext;
struct fsp_fuse_file_desc *filedesc =
(PVOID)(UINT_PTR)Request->Req.Write.UserContext2;
UINT32 Uid, Gid, Mode;
struct fuse_file_info fi;
FSP_FSCTL_FILE_INFO FileInfoBuf;
UINT64 EndOffset, AllocationUnit;
int bytes;
NTSTATUS Result;
if (0 == f->ops.write)
return STATUS_INVALID_DEVICE_REQUEST;
memset(&fi, 0, sizeof fi);
fi.flags = filedesc->OpenFlags;
fi.fh = filedesc->FileHandle;
Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
&Uid, &Gid, &Mode, &FileInfoBuf);
if (!NT_SUCCESS(Result))
return Result;
if (ConstrainedIo)
{
if (Offset >= FileInfoBuf.FileSize)
goto success;
EndOffset = Offset + Length;
if (EndOffset > FileInfoBuf.FileSize)
EndOffset = FileInfoBuf.FileSize;
}
else
{
if (WriteToEndOfFile)
Offset = FileInfoBuf.FileSize;
EndOffset = Offset + Length;
}
bytes = f->ops.write(filedesc->PosixPath, Buffer, (size_t)(EndOffset - Offset), Offset, &fi);
if (0 <= bytes)
{
*PBytesTransferred = bytes;
Result = STATUS_SUCCESS;
}
else
Result = fsp_fuse_ntstatus_from_errno(f->env, bytes);
if (!NT_SUCCESS(Result))
return Result;
success:
AllocationUnit = f->VolumeParams.SectorSize * f->VolumeParams.SectorsPerAllocationUnit;
FileInfoBuf.FileSize = Offset + bytes;
FileInfo->AllocationSize =
(FileInfoBuf.FileSize + AllocationUnit - 1) / AllocationUnit * AllocationUnit;
memcpy(FileInfo, &FileInfoBuf, sizeof FileInfoBuf);
return STATUS_SUCCESS;
} }
static NTSTATUS fsp_fuse_intf_Flush(FSP_FILE_SYSTEM *FileSystem, static NTSTATUS fsp_fuse_intf_Flush(FSP_FILE_SYSTEM *FileSystem,