misc: Further improve imports styling

By introducing `imports_granularity="Module"` format strategy,
effectively groups imports from the same module into one line or block,
improving maintainability and readability.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>

net_util/src/ctrl_queue.rs

@@ -16,8 +16,7 @@ use virtio_queue::{Queue, QueueT};
 use vm_memory::{ByteValued, Bytes, GuestMemoryError};
 use vm_virtio::{AccessPlatform, Translatable};
 
-use crate::GuestMemoryMmap;
-use crate::Tap;
+use crate::{GuestMemoryMmap, Tap};
 
 #[derive(Debug)]
 pub enum Error {

net_util/src/lib.rs

@@ -26,7 +26,8 @@ use virtio_bindings::virtio_net::{
     VIRTIO_NET_F_GUEST_CSUM, VIRTIO_NET_F_GUEST_ECN, VIRTIO_NET_F_GUEST_TSO4,
     VIRTIO_NET_F_GUEST_TSO6, VIRTIO_NET_F_GUEST_UFO, VIRTIO_NET_F_MAC, VIRTIO_NET_F_MQ,
 };
-use vm_memory::{bitmap::AtomicBitmap, ByteValued};
+use vm_memory::bitmap::AtomicBitmap;
+use vm_memory::ByteValued;
 
 type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 

net_util/src/mac.rs

@@ -5,9 +5,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the THIRD-PARTY file.
 
-use std::fmt;
-use std::io;
 use std::str::FromStr;
+use std::{fmt, io};
 
 use serde::de::{Deserialize, Deserializer, Error};
 use serde::ser::{Serialize, Serializer};

net_util/src/tap.rs

@@ -424,10 +424,9 @@ impl AsRawFd for Tap {
 #[cfg(test)]
 mod tests {
     use std::net::Ipv4Addr;
-    use std::str;
     use std::sync::{mpsc, Mutex};
-    use std::thread;
     use std::time::Duration;
+    use std::{str, thread};
 
     use once_cell::sync::Lazy;
     use pnet::packet::ethernet::{EtherTypes, EthernetPacket, MutableEthernetPacket};