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use crate::*;
use std::fs::copy;
use std::path::PathBuf;
use std::process::Command;
use tempfile::{tempdir, TempDir};
fn compile_kernel_module() -> (PathBuf, String, TempDir) {
let _m = crate::FORK_MTX.lock();
let tmp_dir =
tempdir().expect("unable to create temporary build directory");
copy(
"test/test_kmod/hello_mod/hello.c",
tmp_dir.path().join("hello.c"),
)
.expect("unable to copy hello.c to temporary build directory");
copy(
"test/test_kmod/hello_mod/Makefile",
tmp_dir.path().join("Makefile"),
)
.expect("unable to copy Makefile to temporary build directory");
let status = Command::new("make")
.current_dir(tmp_dir.path())
.status()
.expect("failed to run make");
assert!(status.success());
// Return the relative path of the build kernel module
(tmp_dir.path().join("hello.ko"), "hello".to_owned(), tmp_dir)
}
use nix::errno::Errno;
use nix::kmod::{delete_module, DeleteModuleFlags};
use nix::kmod::{finit_module, init_module, ModuleInitFlags};
use std::ffi::CString;
use std::fs::File;
use std::io::Read;
#[test]
fn test_finit_and_delete_module() {
require_capability!("test_finit_and_delete_module", CAP_SYS_MODULE);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let (kmod_path, kmod_name, _kmod_dir) = compile_kernel_module();
let f = File::open(kmod_path).expect("unable to open kernel module");
finit_module(&f, &CString::new("").unwrap(), ModuleInitFlags::empty())
.expect("unable to load kernel module");
delete_module(
&CString::new(kmod_name).unwrap(),
DeleteModuleFlags::empty(),
)
.expect("unable to unload kernel module");
}
#[test]
fn test_finit_and_delete_module_with_params() {
require_capability!(
"test_finit_and_delete_module_with_params",
CAP_SYS_MODULE
);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let (kmod_path, kmod_name, _kmod_dir) = compile_kernel_module();
let f = File::open(kmod_path).expect("unable to open kernel module");
finit_module(
&f,
&CString::new("who=Rust number=2018").unwrap(),
ModuleInitFlags::empty(),
)
.expect("unable to load kernel module");
delete_module(
&CString::new(kmod_name).unwrap(),
DeleteModuleFlags::empty(),
)
.expect("unable to unload kernel module");
}
#[test]
fn test_init_and_delete_module() {
require_capability!("test_init_and_delete_module", CAP_SYS_MODULE);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let (kmod_path, kmod_name, _kmod_dir) = compile_kernel_module();
let mut f = File::open(kmod_path).expect("unable to open kernel module");
let mut contents: Vec<u8> = Vec::new();
f.read_to_end(&mut contents)
.expect("unable to read kernel module content to buffer");
init_module(&contents, &CString::new("").unwrap())
.expect("unable to load kernel module");
delete_module(
&CString::new(kmod_name).unwrap(),
DeleteModuleFlags::empty(),
)
.expect("unable to unload kernel module");
}
#[test]
fn test_init_and_delete_module_with_params() {
require_capability!(
"test_init_and_delete_module_with_params",
CAP_SYS_MODULE
);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let (kmod_path, kmod_name, _kmod_dir) = compile_kernel_module();
let mut f = File::open(kmod_path).expect("unable to open kernel module");
let mut contents: Vec<u8> = Vec::new();
f.read_to_end(&mut contents)
.expect("unable to read kernel module content to buffer");
init_module(&contents, &CString::new("who=Nix number=2015").unwrap())
.expect("unable to load kernel module");
delete_module(
&CString::new(kmod_name).unwrap(),
DeleteModuleFlags::empty(),
)
.expect("unable to unload kernel module");
}
#[test]
fn test_finit_module_invalid() {
require_capability!("test_finit_module_invalid", CAP_SYS_MODULE);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let kmod_path = "/dev/zero";
let f = File::open(kmod_path).expect("unable to open kernel module");
let result =
finit_module(&f, &CString::new("").unwrap(), ModuleInitFlags::empty());
assert_eq!(result.unwrap_err(), Errno::EINVAL);
}
#[test]
fn test_finit_module_twice_and_delete_module() {
require_capability!(
"test_finit_module_twice_and_delete_module",
CAP_SYS_MODULE
);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let (kmod_path, kmod_name, _kmod_dir) = compile_kernel_module();
let f = File::open(kmod_path).expect("unable to open kernel module");
finit_module(&f, &CString::new("").unwrap(), ModuleInitFlags::empty())
.expect("unable to load kernel module");
let result =
finit_module(&f, &CString::new("").unwrap(), ModuleInitFlags::empty());
assert_eq!(result.unwrap_err(), Errno::EEXIST);
delete_module(
&CString::new(kmod_name).unwrap(),
DeleteModuleFlags::empty(),
)
.expect("unable to unload kernel module");
}
#[test]
fn test_delete_module_not_loaded() {
require_capability!("test_delete_module_not_loaded", CAP_SYS_MODULE);
let _m0 = crate::KMOD_MTX.lock();
let _m1 = crate::CWD_LOCK.read();
let result = delete_module(
&CString::new("hello").unwrap(),
DeleteModuleFlags::empty(),
);
assert_eq!(result.unwrap_err(), Errno::ENOENT);
}
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