runc: Remove unused fields, stop pinning to old Rust version

Dockerfile

@@ -4,36 +4,33 @@ RUN zypper ar -p 90 -r https://download.opensuse.org/repositories/devel:/languag
     && zypper --gpg-auto-import-keys ref \
     && zypper --non-interactive dup --allow-vendor-change
 RUN zypper --non-interactive install -t pattern \
-        devel_C_C++ \
-        devel_basis \
+    devel_C_C++ \
+    devel_basis \
     && zypper --non-interactive install \
-        clang \
-        curl \
-        libelf-devel \
-	libopenssl-devel \
-        llvm \
-        rustup \
-        sudo \
-        tar \
-        xz \
-        zlib-devel \
+    clang \
+    curl \
+    libelf-devel \
+    libopenssl-devel \
+    llvm \
+    rustup \
+    sudo \
+    tar \
+    xz \
+    zlib-devel \
     && zypper clean
 RUN rustup-init -y
 ENV PATH="/root/.cargo/bin:${PATH}"
-# Pin to Rust 1.56.1.
-RUN rustup install 1.56.1 \
-    && rustup default 1.56.1-x86_64-unknown-linux-gnu
 RUN rustup component add \
-        clippy \
-        rustfmt
+    clippy \
+    rustfmt
 RUN cargo install \
-        libbpf-cargo
+    libbpf-cargo
 
 FROM builder AS build
 WORKDIR /usr/local/src
 # Build bpftool from the newest stable kernel sources.
 RUN curl -Lso linux.tar.xz \
-        $(curl -s https://www.kernel.org/ | grep -A1 "latest_link" | grep -Eo '(http|https)://[^"]+') \
+    $(curl -s https://www.kernel.org/ | grep -A1 "latest_link" | grep -Eo '(http|https)://[^"]+') \
     && tar -xf linux.tar.xz \
     && mv $(find . -maxdepth 1 -type d -name "linux*") linux \
     && cd linux \
@@ -47,8 +44,8 @@ RUN cargo build --release
 FROM registry.opensuse.org/opensuse/leap:15.3 AS lockcd
 # runc links those libraries dynamically
 RUN zypper --non-interactive install \
-        libseccomp2 \
-        libselinux1 \
+    libseccomp2 \
+    libselinux1 \
     && zypper clean
 COPY --from=build /usr/local/src/linux/tools/bpf/bpftool/bpftool /usr/sbin/bpftool
 COPY --from=build /usr/local/src/lockc/target/release/lockcd /usr/bin/lockcd

lockc/src/runc.rs

@@ -62,10 +62,7 @@ enum ContainerType {
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct Mount {
-    destination: String,
-    r#type: String,
     source: String,
-    options: Vec<String>,
 }
 
 #[derive(Debug, Deserialize)]
@@ -224,12 +221,6 @@ fn policy_kubernetes_sync(
     }
 }
 
-#[derive(Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct Mounts {
-    mounts: Vec<Mount>,
-}
-
 fn policy_docker<P: AsRef<Path>>(
     docker_bundle: P,
 ) -> Result<container_policy_level, ContainerError> {