Can decompress QCow2

virtweb_backend/src/constants.rs

@@ -126,3 +126,6 @@ pub const IP_PROGRAM: &str = "/usr/sbin/ip";
 
 /// Copy program path
 pub const COPY_PROGRAM: &str = "/bin/cp";
+
+/// Gzip program path
+pub const GZIP_PROGRAM: &str = "/usr/bin/gzip";

virtweb_backend/src/utils/file_disks_utils.rs

@@ -1,6 +1,7 @@
 use crate::app_config::AppConfig;
 use crate::constants;
 use crate::utils::file_size_utils::FileSize;
+use std::fs::File;
 use std::os::linux::fs::MetadataExt;
 use std::path::{Path, PathBuf};
 use std::process::Command;
@@ -156,6 +157,17 @@ impl DiskFileInfo {
 
         // Prepare the conversion
         let mut cmd = match (self.format, dest_format) {
+            // Decompress QCow2
+            (DiskFileFormat::CompressedQCow2, DiskFileFormat::QCow2 { .. }) => {
+                let mut cmd = Command::new(constants::GZIP_PROGRAM);
+                cmd.arg("--keep")
+                    .arg("--decompress")
+                    .arg("--to-stdout")
+                    .arg(&self.file_path)
+                    .stdout(File::create(&temp_file)?);
+                cmd
+            }
+
             // Dumb copy of file
             (a, b) if a == b => {
                 let mut cmd = Command::new(constants::COPY_PROGRAM);

virtweb_frontend/src/routes/DiskImagesRoute.tsx

@@ -1,7 +1,7 @@
 import DeleteIcon from "@mui/icons-material/Delete";
 import DownloadIcon from "@mui/icons-material/Download";
-import RefreshIcon from "@mui/icons-material/Refresh";
 import LoopIcon from "@mui/icons-material/Loop";
+import RefreshIcon from "@mui/icons-material/Refresh";
 import {
   Alert,
   Button,
@@ -16,17 +16,17 @@ import { filesize } from "filesize";
 import React from "react";
 import { DiskImage, DiskImageApi } from "../api/DiskImageApi";
 import { ServerApi } from "../api/ServerApi";
+import { ConvertDiskImageDialog } from "../dialogs/ConvertDiskImageDialog";
 import { useAlert } from "../hooks/providers/AlertDialogProvider";
 import { useConfirm } from "../hooks/providers/ConfirmDialogProvider";
 import { useLoadingMessage } from "../hooks/providers/LoadingMessageProvider";
 import { useSnackbar } from "../hooks/providers/SnackbarProvider";
+import { downloadBlob } from "../utils/FilesUtils";
 import { AsyncWidget } from "../widgets/AsyncWidget";
 import { DateWidget } from "../widgets/DateWidget";
 import { FileInput } from "../widgets/forms/FileInput";
 import { VirtWebPaper } from "../widgets/VirtWebPaper";
 import { VirtWebRouteContainer } from "../widgets/VirtWebRouteContainer";
-import { downloadBlob } from "../utils/FilesUtils";
-import { ConvertDiskImageDialog } from "../dialogs/ConvertDiskImageDialog";
 
 export function DiskImagesRoute(): React.ReactElement {
   const [list, setList] = React.useState<DiskImage[] | undefined>();
@@ -232,7 +232,13 @@ function DiskImageList(p: {
       headerName: "File size",
       flex: 1,
       renderCell(params) {
-        return filesize(params.row.file_size);
+        let res = filesize(params.row.file_size);
+
+        if (params.row.format === "QCow2") {
+          res += ` (${filesize(params.row.virtual_size!)})`;
+        }
+
+        return res;
       },
     },
     {