refactor error handling with thiserror in dtpm module

Cargo.lock

@@ -176,7 +176,8 @@ dependencies = [
  "base64",
  "prost",
  "serde",
- "serde_yml",
+ "serde_yaml",
+ "thiserror",
  "tonic",
  "tonic-build",
 ]
@@ -454,16 +455,6 @@ version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
 
-[[package]]
-name = "libyml"
-version = "0.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3302702afa434ffa30847a83305f0a69d6abd74293b6554c18ec85c7ef30c980"
-dependencies = [
- "anyhow",
- "version_check",
-]
-
 [[package]]
 name = "linux-raw-sys"
 version = "0.4.14"
@@ -758,9 +749,9 @@ checksum = "0e819f2bc632f285be6d7cd36e25940d45b2391dd6d9b939e79de557f7014248"
 
 [[package]]
 name = "ryu"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+checksum = "6ea1a2d0a644769cc99faa24c3ad26b379b786fe7c36fd3c546254801650e6dd"
 
 [[package]]
 name = "serde"
@@ -783,18 +774,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "serde_yml"
+name = "serde_yaml"
-version = "0.0.12"
+version = "0.9.34+deprecated"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59e2dd588bf1597a252c3b920e0143eb99b0f76e4e082f4c92ce34fbc9e71ddd"
+checksum = "6a8b1a1a2ebf674015cc02edccce75287f1a0130d394307b36743c2f5d504b47"
 dependencies = [
  "indexmap 2.7.0",
  "itoa",
- "libyml",
- "memchr",
  "ryu",
  "serde",
- "version_check",
+ "unsafe-libyaml",
 ]
 
 [[package]]
@@ -852,6 +841,26 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "thiserror"
+version = "2.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d452f284b73e6d76dd36758a0c8684b1d5be31f92b89d07fd5822175732206fc"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "2.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tokio"
 version = "1.42.0"
@@ -1037,10 +1046,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
 
 [[package]]
-name = "version_check"
+name = "unsafe-libyaml"
-version = "0.9.5"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
 
 [[package]]
 name = "want"

Cargo.toml

@@ -7,7 +7,8 @@ edition = "2021"
 base64 = "0.22.1"
 prost = "0.13.4"
 serde = { version = "1.0.216", features = ["derive"] }
-serde_yml = "0.0.12"
+serde_yaml = "0.9.34"
+thiserror = "2.0.11"
 tonic = "0.12.3"
 
 [build-dependencies]

src/sgx/types/dtpm.rs

@@ -180,13 +180,23 @@ impl From<RestartPolicy> for pb_dtpm::RestartPolicy {
     }
 }
 
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("Disk Access Error: {0}")]
+    DiskAccess(#[from] std::io::Error),
+    #[error("Yaml Error: {0}")]
+    SerdeYaml(#[from] serde_yaml::Error),
+}
+
+type Result<T> = std::result::Result<T, Error>;
+
 impl DtpmConfig {
-    pub fn from_path(path: &str) -> Result<Self, Box<dyn std::error::Error>> {
+    pub fn from_path(path: &str) -> Result<Self> {
         let config_str = std::fs::read_to_string(path)?;
-        Ok(serde_yml::from_str(&config_str)?)
+        Ok(serde_yaml::from_str(&config_str)?)
     }
 
-    pub fn load_data(mut self) -> Result<Self, Box<dyn std::error::Error>> {
+    pub fn load_data(mut self) -> Result<Self> {
         self.filesystems.iter_mut().for_each(|x| {
             if let FileContent::Path(path) = &x.content {
                 let content =