Clippy fixes for latest nightly

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>

aya/src/maps/hash_map/mod.rs

@@ -15,7 +15,7 @@ pub use per_cpu_hash_map::*;
 use super::MapData;
 
 pub(crate) fn insert<K: Pod, V: Pod>(
-    map: &mut MapData,
+    map: &MapData,
     key: &K,
     value: &V,
     flags: u64,
@@ -31,7 +31,7 @@ pub(crate) fn insert<K: Pod, V: Pod>(
     Ok(())
 }
 
-pub(crate) fn remove<K: Pod>(map: &mut MapData, key: &K) -> Result<(), MapError> {
+pub(crate) fn remove<K: Pod>(map: &MapData, key: &K) -> Result<(), MapError> {
     let fd = map.fd_or_err()?;
     bpf_map_delete_elem(fd, key)
         .map(|_| ())

aya/src/maps/perf/perf_buffer.rs

@@ -328,7 +328,7 @@ mod tests {
         data: [u8; PAGE_SIZE * 2],
     }
 
-    fn fake_mmap(buf: &mut MMappedBuf) {
+    fn fake_mmap(buf: &MMappedBuf) {
         override_syscall(|call| match call {
             Syscall::PerfEventOpen { .. } | Syscall::PerfEventIoctl { .. } => Ok(42),
             _ => panic!(),
@@ -355,10 +355,10 @@ mod tests {
     #[test]
     #[cfg_attr(miri, ignore)]
     fn test_no_out_bufs() {
-        let mut mmapped_buf = MMappedBuf {
+        let mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
 
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
         assert_matches!(buf.read_events(&mut []), Err(PerfBufferError::NoBuffers))
@@ -367,10 +367,10 @@ mod tests {
     #[test]
     #[cfg_attr(miri, ignore)]
     fn test_no_events() {
-        let mut mmapped_buf = MMappedBuf {
+        let mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
 
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
         let out_buf = BytesMut::with_capacity(4);
@@ -386,7 +386,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
 
         let evt = LostSamples {
             header: perf_event_header {
@@ -451,7 +451,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         write_sample(&mut mmapped_buf, 0, 0xCAFEBABEu32);
@@ -469,7 +469,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         let next = write_sample(&mut mmapped_buf, 0, 0xCAFEBABEu32);
@@ -492,7 +492,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         let next = write_sample(&mut mmapped_buf, 0, 0xCAFEBABEu32);
@@ -514,7 +514,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         let offset = PAGE_SIZE - mem::size_of::<PerfSample<u32>>();
@@ -534,7 +534,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         let header = perf_event_header {
@@ -563,7 +563,7 @@ mod tests {
         let mut mmapped_buf = MMappedBuf {
             data: [0; PAGE_SIZE * 2],
         };
-        fake_mmap(&mut mmapped_buf);
+        fake_mmap(&mmapped_buf);
         let mut buf = PerfBuffer::open(1, PAGE_SIZE, 1).unwrap();
 
         let sample = PerfSample {

aya/src/programs/extension.rs

@@ -172,12 +172,11 @@ fn get_btf_info(prog_fd: i32, func_name: &str) -> Result<(RawFd, u32), ProgramEr
     // we need to read the btf bytes into a buffer but we don't know the size ahead of time.
     // assume 4kb. if this is too small we can resize based on the size obtained in the response.
     let mut buf = vec![0u8; 4096];
-    let btf_info = match sys::btf_obj_get_info_by_fd(btf_fd, &mut buf) {
+    let btf_info = match sys::btf_obj_get_info_by_fd(btf_fd, &buf) {
         Ok(info) => {
             if info.btf_size > buf.len() as u32 {
                 buf.resize(info.btf_size as usize, 0u8);
-                let btf_info =
+                let btf_info = sys::btf_obj_get_info_by_fd(btf_fd, &buf).map_err(|io_error| {
-                    sys::btf_obj_get_info_by_fd(btf_fd, &mut buf).map_err(|io_error| {
                     ProgramError::SyscallError {
                         call: "bpf_prog_get_info_by_fd",
                         io_error,

aya/src/programs/mod.rs

@@ -523,10 +523,7 @@ fn unload_program<T: Link>(data: &mut ProgramData<T>) -> Result<(), ProgramError
     Ok(())
 }
 
-fn pin_program<T: Link, P: AsRef<Path>>(
+fn pin_program<T: Link, P: AsRef<Path>>(data: &ProgramData<T>, path: P) -> Result<(), PinError> {
-    data: &mut ProgramData<T>,
-    path: P,
-) -> Result<(), PinError> {
     let fd = data.fd.ok_or(PinError::NoFd {
         name: data
             .name
@@ -783,7 +780,7 @@ macro_rules! impl_program_pin{
                 /// Any directories in the the path provided should have been created by the caller.
                 pub fn pin<P: AsRef<Path>>(&mut self, path: P) -> Result<(), PinError> {
                     self.data.path = Some(path.as_ref().to_path_buf());
-                    pin_program(&mut self.data, path)
+                    pin_program(&self.data, path)
                 }
 
                 /// Removes the pinned link from the filesystem.

aya/src/sys/bpf.rs

@@ -518,7 +518,7 @@ pub(crate) fn bpf_link_get_info_by_fd(link_fd: RawFd) -> Result<bpf_link_info, i
 
 pub(crate) fn btf_obj_get_info_by_fd(
     prog_fd: RawFd,
-    buf: &mut [u8],
+    buf: &[u8],
 ) -> Result<bpf_btf_info, io::Error> {
     let mut attr = unsafe { mem::zeroed::<bpf_attr>() };
     let mut info = unsafe { mem::zeroed::<bpf_btf_info>() };

aya/src/sys/netlink.rs

@@ -575,8 +575,8 @@ impl From<NlAttrError> for io::Error {
 }
 
 unsafe fn request_attributes<T>(req: &mut T, msg_len: usize) -> &mut [u8] {
-    let attrs_addr = align_to(req as *const _ as usize + msg_len, NLMSG_ALIGNTO as usize);
+    let attrs_addr = align_to(req as *mut _ as usize + msg_len, NLMSG_ALIGNTO as usize);
-    let attrs_end = req as *const _ as usize + mem::size_of::<T>();
+    let attrs_end = req as *mut _ as usize + mem::size_of::<T>();
     slice::from_raw_parts_mut(attrs_addr as *mut u8, attrs_end - attrs_addr)
 }
 

bpf/aya-bpf/src/helpers.rs

@@ -410,7 +410,7 @@ pub unsafe fn bpf_probe_read_user_str_bytes(
     read_str_bytes(len, dest)
 }
 
-fn read_str_bytes(len: i64, dest: &mut [u8]) -> Result<&[u8], c_long> {
+fn read_str_bytes(len: i64, dest: &[u8]) -> Result<&[u8], c_long> {
     // The lower bound is 0, since it's what is returned for b"\0". See the
     // bpf_probe_read_user_[user|kernel]_bytes_empty integration tests.  The upper bound
     // check is not needed since the helper truncates, but the verifier doesn't