ksud: determine modules's size by checking partion size

userspace/ksud/Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -591,6 +591,16 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "fs4"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c29c30684418547d476f0b48e84f4821639119c483b1eccd566c8cd0cd05f521"
+dependencies = [
+ "rustix 0.38.41",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -806,6 +816,7 @@ dependencies = [
  "encoding_rs",
  "env_logger",
  "extattr",
+ "fs4",
  "getopts",
  "hole-punch",
  "humansize",

userspace/ksud/Cargo.toml

@@ -43,6 +43,7 @@ tempfile = "3.14"
 chrono = "0.4"
 hole-punch = { git = "https://github.com/tiann/hole-punch" }
 regex-lite = "0.1"
+fs4 = "0.12"
 
 [target.'cfg(any(target_os = "android", target_os = "linux"))'.dependencies]
 rustix = { git = "https://github.com/Kernel-SU/rustix.git", branch = "main", features = [

userspace/ksud/src/module.rs

@@ -375,7 +375,8 @@ fn _install_module(zip: &str) -> Result<()> {
         humansize::format_size(zip_uncompressed_size, humansize::DECIMAL)
     );
 
-    let sparse_image_size = 1 << 40; // 1T
+    let data_vfs = fs4::statvfs("/data").with_context(|| "Failed to stat /data".to_string())?;
+    let sparse_image_size = data_vfs.total_space();
     if !modules_img_exist && !modules_update_img_exist {
         // if no modules and modules_update, it is brand new installation, we should create a new img
         // create a tmp module img and mount it to modules_update