Add e2e test: process rlimits (#2977)

* add process rlimits test

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* fix newline code

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* fix fmt

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* fix format err

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* add process args to run test

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* fix unsafe code by use nix

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* remove unused import

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

---------

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

tests/contest/contest/src/main.rs

@@ -21,6 +21,7 @@ use crate::tests::linux_ns_itype::get_ns_itype_tests;
 use crate::tests::mounts_recursive::get_mounts_recursive_test;
 use crate::tests::no_pivot::get_no_pivot_test;
 use crate::tests::pidfile::get_pidfile_test;
+use crate::tests::process_rlimits::get_process_rlimits_test;
 use crate::tests::readonly_paths::get_ro_paths_test;
 use crate::tests::scheduler::get_scheduler_test;
 use crate::tests::seccomp::get_seccomp_test;
@@ -114,6 +115,7 @@ fn main() -> Result<()> {
     let scheduler = get_scheduler_test();
     let io_priority_test = get_io_priority_test();
     let devices = get_devices_test();
+    let process_rlimtis = get_process_rlimits_test();
     let no_pivot = get_no_pivot_test();
 
     tm.add_test_group(Box::new(cl));
@@ -138,6 +140,7 @@ fn main() -> Result<()> {
     tm.add_test_group(Box::new(sysctl));
     tm.add_test_group(Box::new(scheduler));
     tm.add_test_group(Box::new(devices));
+    tm.add_test_group(Box::new(process_rlimtis));
     tm.add_test_group(Box::new(no_pivot));
 
     tm.add_test_group(Box::new(io_priority_test));

tests/contest/contest/src/tests/mod.rs

@@ -11,6 +11,7 @@ pub mod linux_ns_itype;
 pub mod mounts_recursive;
 pub mod no_pivot;
 pub mod pidfile;
+pub mod process_rlimits;
 pub mod readonly_paths;
 pub mod scheduler;
 pub mod seccomp;

tests/contest/contest/src/tests/process_rlimits/mod.rs

@@ -0,0 +1,2 @@
+mod process_rlimits_test;
+pub use process_rlimits_test::get_process_rlimits_test;

tests/contest/contest/src/tests/process_rlimits/process_rlimits_test.rs

@@ -0,0 +1,67 @@
+use anyhow::{Context, Ok, Result};
+use oci_spec::runtime::{
+    PosixRlimit, PosixRlimitBuilder, PosixRlimitType, ProcessBuilder, Spec, SpecBuilder,
+};
+use test_framework::{test_result, Test, TestGroup, TestResult};
+
+use crate::utils::test_inside_container;
+
+const GIGABYTES: u64 = 1024 * 1024 * 1024;
+
+fn create_rlimit(
+    rlimit_type: PosixRlimitType,
+    hard_val: u64,
+    soft_val: u64,
+) -> Result<PosixRlimit> {
+    let rlimit = PosixRlimitBuilder::default()
+        .typ(rlimit_type)
+        .hard(hard_val)
+        .soft(soft_val)
+        .build()?;
+    Ok(rlimit)
+}
+
+#[allow(clippy::identity_op)]
+fn create_spec() -> Result<Spec> {
+    let spec = SpecBuilder::default()
+        .process(
+            ProcessBuilder::default()
+                .args(vec![
+                    "runtimetest".to_string(),
+                    "process_rlimits".to_string(),
+                ])
+                .rlimits(vec![
+                    create_rlimit(PosixRlimitType::RlimitAs, 2 * GIGABYTES, 1 * GIGABYTES).unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitCore, 4 * GIGABYTES, 3 * GIGABYTES)
+                        .unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitData, 6 * GIGABYTES, 5 * GIGABYTES)
+                        .unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitFsize, 8 * GIGABYTES, 7 * GIGABYTES)
+                        .unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitStack, 10 * GIGABYTES, 9 * GIGABYTES)
+                        .unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitCpu, 120, 60).unwrap(),
+                    create_rlimit(PosixRlimitType::RlimitNofile, 4000, 3000).unwrap(),
+                ])
+                .build()
+                .expect("error in creating process config"),
+        )
+        .build()
+        .context("failed to build spec")?;
+
+    Ok(spec)
+}
+
+fn process_rlimits_test() -> TestResult {
+    let spec = test_result!(create_spec());
+    test_inside_container(spec, &|_| Ok(()))
+}
+
+pub fn get_process_rlimits_test() -> TestGroup {
+    let mut process_rlimits_test_group = TestGroup::new("process_rlimits");
+
+    let test = Test::new("process_rlimits_test", Box::new(process_rlimits_test));
+    process_rlimits_test_group.add(vec![Box::new(test)]);
+
+    process_rlimits_test_group
+}

tests/contest/runtimetest/src/main.rs

@@ -44,6 +44,7 @@ fn main() {
         "io_priority_class_be" => tests::test_io_priority_class(&spec, IoprioClassBe),
         "io_priority_class_idle" => tests::test_io_priority_class(&spec, IoprioClassIdle),
         "devices" => tests::validate_devices(&spec),
+        "process_rlimits" => tests::validate_process_rlimits(&spec),
         "no_pivot" => tests::validate_rootfs(),
         _ => eprintln!("error due to unexpected execute test name: {execute_test}"),
     }

tests/contest/runtimetest/src/tests.rs

@@ -6,10 +6,13 @@ use std::path::Path;
 use anyhow::{bail, Result};
 use nix::errno::Errno;
 use nix::libc;
+use nix::sys::resource::{getrlimit, Resource};
 use nix::sys::utsname;
 use nix::unistd::getcwd;
 use oci_spec::runtime::IOPriorityClass::{self, IoprioClassBe, IoprioClassIdle, IoprioClassRt};
-use oci_spec::runtime::{LinuxDevice, LinuxDeviceType, LinuxSchedulerPolicy, Spec};
+use oci_spec::runtime::{
+    LinuxDevice, LinuxDeviceType, LinuxSchedulerPolicy, PosixRlimit, PosixRlimitType, Spec,
+};
 
 use crate::utils::{self, test_read_access, test_write_access};
 
@@ -546,6 +549,53 @@ pub fn test_io_priority_class(spec: &Spec, io_priority_class: IOPriorityClass) {
     }
 }
 
+pub fn validate_process_rlimits(spec: &Spec) {
+    let process = spec.process().as_ref().unwrap();
+    let spec_rlimits: &Vec<PosixRlimit> = process.rlimits().as_ref().unwrap();
+
+    for spec_rlimit in spec_rlimits.iter() {
+        let (soft_limit, hard_limit) = getrlimit(change_resource_type(spec_rlimit.typ())).unwrap();
+        if spec_rlimit.hard() != hard_limit {
+            eprintln!(
+                "error type of {:?} hard rlimit expected {:?} , got {:?}",
+                spec_rlimit.typ(),
+                spec_rlimit.hard(),
+                hard_limit
+            )
+        }
+
+        if spec_rlimit.soft() != soft_limit {
+            eprintln!(
+                "error type of {:?} soft rlimit expected {:?} , got {:?}",
+                spec_rlimit.typ(),
+                spec_rlimit.soft(),
+                soft_limit
+            )
+        }
+    }
+}
+
+fn change_resource_type(resource_type: PosixRlimitType) -> Resource {
+    match resource_type {
+        PosixRlimitType::RlimitCpu => Resource::RLIMIT_CPU,
+        PosixRlimitType::RlimitFsize => Resource::RLIMIT_FSIZE,
+        PosixRlimitType::RlimitData => Resource::RLIMIT_DATA,
+        PosixRlimitType::RlimitStack => Resource::RLIMIT_STACK,
+        PosixRlimitType::RlimitCore => Resource::RLIMIT_CORE,
+        PosixRlimitType::RlimitRss => Resource::RLIMIT_RSS,
+        PosixRlimitType::RlimitNproc => Resource::RLIMIT_NPROC,
+        PosixRlimitType::RlimitNofile => Resource::RLIMIT_NOFILE,
+        PosixRlimitType::RlimitMemlock => Resource::RLIMIT_MEMLOCK,
+        PosixRlimitType::RlimitAs => Resource::RLIMIT_AS,
+        PosixRlimitType::RlimitLocks => Resource::RLIMIT_LOCKS,
+        PosixRlimitType::RlimitSigpending => Resource::RLIMIT_SIGPENDING,
+        PosixRlimitType::RlimitMsgqueue => Resource::RLIMIT_MSGQUEUE,
+        PosixRlimitType::RlimitNice => Resource::RLIMIT_NICE,
+        PosixRlimitType::RlimitRtprio => Resource::RLIMIT_RTPRIO,
+        PosixRlimitType::RlimitRttime => Resource::RLIMIT_RTTIME,
+    }
+}
+
 // the validate_rootfs function is used to validate the rootfs of the container is
 // as expected. This function is used in the no_pivot test to validate the rootfs
 pub fn validate_rootfs() {