Add init_module, finit_module, and delete_module syscalls (#1005)

Author: yujincheng08

src/backend/linux_raw/system/syscalls.rs

@@ -7,7 +7,10 @@
 
 use super::types::RawUname;
 use crate::backend::c;
-use crate::backend::conv::{c_int, ret, ret_infallible, slice};
+use crate::backend::conv::{c_int, ret, ret_error, ret_infallible, slice};
+#[cfg(feature = "fs")]
+use crate::fd::BorrowedFd;
+use crate::ffi::CStr;
 use crate::io;
 use crate::system::{RebootCommand, Sysinfo};
 use core::mem::MaybeUninit;
@@ -47,3 +50,38 @@ pub(crate) fn reboot(cmd: RebootCommand) -> io::Result<()> {
         ))
     }
 }
+
+#[cfg(any(target_os = "linux", target_os = "android"))]
+#[inline]
+pub(crate) fn init_module(image: &[u8], param_values: &CStr) -> io::Errno {
+    let (image, len) = slice(image);
+    unsafe {
+        ret_error(syscall_readonly!(
+            __NR_init_module,
+            image,
+            len,
+            param_values
+        ))
+    }
+}
+
+#[cfg(any(target_os = "linux", target_os = "android"))]
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn finit_module(fd: BorrowedFd<'_>, param_values: &CStr, flags: c::c_int) -> io::Errno {
+    unsafe {
+        ret_error(syscall_readonly!(
+            __NR_finit_module,
+            fd,
+            param_values,
+            c_int(flags)
+        ))
+    }
+}
+
+#[cfg(any(target_os = "linux", target_os = "android"))]
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn delete_module(name: &CStr, flags: c::c_int) -> io::Errno {
+    unsafe { ret_error(syscall_readonly!(__NR_delete_module, name, c_int(flags))) }
+}

src/system.rs

@@ -17,6 +17,11 @@ use core::fmt;
 #[cfg(linux_kernel)]
 pub use backend::system::types::Sysinfo;
 
+#[cfg(linux_raw)]
+use crate::fd::AsFd;
+#[cfg(linux_raw)]
+use core::ffi::c_int;
+
 /// `uname()`—Returns high-level information about the runtime OS and
 /// hardware.
 ///
@@ -218,3 +223,40 @@ pub enum RebootCommand {
 pub fn reboot(cmd: RebootCommand) -> io::Result<()> {
     backend::system::syscalls::reboot(cmd)
 }
+
+/// `init_module`—Load a kernel module
+///
+/// # References
+/// - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man2/init_module.2.html
+#[inline]
+#[cfg(linux_raw)]
+pub fn init_module(image: &[u8], param_values: &CStr) -> io::Errno {
+    backend::system::syscalls::init_module(image, param_values)
+}
+
+/// `finit_module`—Load a kernel module from a file descriptor
+///
+/// # References
+/// - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man2/finit_module.2.html
+#[inline]
+#[cfg(linux_raw)]
+#[cfg(feature = "fs")]
+pub fn finit_module<Fd: AsFd>(fd: Fd, param_values: &CStr, flags: c_int) -> io::Errno {
+    backend::system::syscalls::finit_module(fd.as_fd(), param_values, flags)
+}
+
+/// `delete_module`—Unload a kernel module
+///
+/// # References
+/// - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man2/delete_module.2.html
+#[inline]
+#[cfg(linux_raw)]
+pub fn delete_module(name: &CStr, flags: c_int) -> io::Errno {
+    backend::system::syscalls::delete_module(name, flags)
+}