Merge pull request #51 from Tim-Zhang/release-0.2.6

release: v0.2.6

.clippy.toml

@@ -0,0 +1 @@
+upper-case-acronyms-aggressive = true

Cargo.toml

@@ -5,7 +5,7 @@ repository = "https://github.com/kata-containers/cgroups-rs"
 keywords = ["linux", "cgroup", "containers", "isolation"]
 categories = ["os", "api-bindings", "os::unix-apis"]
 license = "MIT OR Apache-2.0"
-version = "0.2.4"
+version = "0.2.6"
 authors = ["The Kata Containers community <kata-dev@lists.katacontainers.io>", "Levente Kurusa <lkurusa@acm.org>", "Sam Wilson <tecywiz121@hotmail.com>"]
 edition = "2018"
 homepage = "https://github.com/kata-containers/cgroups-rs"

src/cgroup.rs

@@ -311,9 +311,8 @@ impl Cgroup {
 
 pub const UNIFIED_MOUNTPOINT: &str = "/sys/fs/cgroup";
 
-fn enable_controllers(controllers: &[String], path: &PathBuf) {
-    let mut f = path.clone();
-    f.push("cgroup.subtree_control");
+fn enable_controllers(controllers: &[String], path: &Path) {
+    let f = path.join("cgroup.subtree_control");
     for c in controllers {
         let body = format!("+{}", c);
         let _rest = fs::write(f.as_path(), body.as_bytes());

src/cgroup_builder.rs

@@ -240,10 +240,10 @@ impl DeviceResourceBuilder {
         access: Vec<crate::devices::DevicePermissions>,
     ) -> DeviceResourceBuilder {
         self.cgroup.resources.devices.devices.push(DeviceResource {
+            allow,
+            devtype,
             major,
             minor,
-            devtype,
-            allow,
             access,
         });
         self

src/cpu.rs

@@ -45,7 +45,7 @@ pub struct Cpu {
 
 /// The current state of the control group and its processes.
 #[derive(Debug)]
-struct CFSQuotaAndPeriod {
+struct CfsQuotaAndPeriod {
     quota: MaxValue,
     period: u64,
 }
@@ -284,7 +284,7 @@ impl CpuController {
 
 impl CustomizedAttribute for CpuController {}
 
-fn parse_cfs_quota_and_period(mut file: File) -> Result<CFSQuotaAndPeriod> {
+fn parse_cfs_quota_and_period(mut file: File) -> Result<CfsQuotaAndPeriod> {
     let mut content = String::new();
     file.read_to_string(&mut content)
         .map_err(|e| Error::with_cause(ReadFailed, e))?;
@@ -299,5 +299,5 @@ fn parse_cfs_quota_and_period(mut file: File) -> Result<CFSQuotaAndPeriod> {
         .parse::<u64>()
         .map_err(|e| Error::with_cause(ParseError, e))?;
 
-    Ok(CFSQuotaAndPeriod { quota, period })
+    Ok(CfsQuotaAndPeriod { quota, period })
 }

src/devices.rs

@@ -49,6 +49,7 @@ impl Default for DeviceType {
 
 impl DeviceType {
     /// Convert a DeviceType into the character that the kernel recognizes.
+    #[allow(clippy::should_implement_trait, clippy::wrong_self_convention)]
     pub fn to_char(&self) -> char {
         match self {
             DeviceType::All => 'a',
@@ -82,6 +83,7 @@ pub enum DevicePermissions {
 
 impl DevicePermissions {
     /// Convert a DevicePermissions into the character that the kernel recognizes.
+    #[allow(clippy::should_implement_trait, clippy::wrong_self_convention)]
     pub fn to_char(&self) -> char {
         match self {
             DevicePermissions::Read => 'r',

src/error.rs

@@ -76,6 +76,7 @@ impl fmt::Display for Error {
 
 impl StdError for Error {
     fn cause(&self) -> Option<&dyn StdError> {
+        #[allow(clippy::manual_map)]
         match self.cause {
             Some(ref x) => Some(&**x),
             None => None,

src/events.rs

@@ -8,7 +8,7 @@ use nix::sys::eventfd;
 use std::fs::{self, File};
 use std::io::Read;
 use std::os::unix::io::{AsRawFd, FromRawFd};
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::sync::mpsc::{self, Receiver};
 use std::thread;
 
@@ -17,18 +17,18 @@ use crate::error::*;
 
 // notify_on_oom returns channel on which you can expect event about OOM,
 // if process died without OOM this channel will be closed.
-pub fn notify_on_oom_v2(key: &str, dir: &PathBuf) -> Result<Receiver<String>> {
+pub fn notify_on_oom_v2(key: &str, dir: &Path) -> Result<Receiver<String>> {
     register_memory_event(key, dir, "memory.oom_control", "")
 }
 
 // notify_on_oom returns channel on which you can expect event about OOM,
 // if process died without OOM this channel will be closed.
-pub fn notify_on_oom_v1(key: &str, dir: &PathBuf) -> Result<Receiver<String>> {
+pub fn notify_on_oom_v1(key: &str, dir: &Path) -> Result<Receiver<String>> {
     register_memory_event(key, dir, "memory.oom_control", "")
 }
 
 // level is one of "low", "medium", or "critical"
-pub fn notify_memory_pressure(key: &str, dir: &PathBuf, level: &str) -> Result<Receiver<String>> {
+pub fn notify_memory_pressure(key: &str, dir: &Path, level: &str) -> Result<Receiver<String>> {
     if level != "low" && level != "medium" && level != "critical" {
         return Err(Error::from_string(format!(
             "invalid pressure level {}",
@@ -41,7 +41,7 @@ pub fn notify_memory_pressure(key: &str, dir: &PathBuf, level: &str) -> Result<R
 
 fn register_memory_event(
     key: &str,
-    cg_dir: &PathBuf,
+    cg_dir: &Path,
     event_name: &str,
     arg: &str,
 ) -> Result<Receiver<String>> {

src/freezer.rs

@@ -130,7 +130,7 @@ impl FreezerController {
             let mut s = String::new();
             let res = file.read_to_string(&mut s);
             match res {
-                Ok(_) => match s.as_ref() {
+                Ok(_) => match s.trim() {
                     "FROZEN" => Ok(FreezerState::Frozen),
                     "THAWED" => Ok(FreezerState::Thawed),
                     "1" => Ok(FreezerState::Frozen),

src/hierarchies.rs

@@ -35,7 +35,7 @@ use crate::cgroup::Cgroup;
 /// Process mounts information.
 ///
 /// See `proc(5)` for format details.
-#[derive(Debug, PartialEq, Eq, Hash)]
+#[derive(Debug, PartialEq, Eq, Hash, Clone)]
 pub struct Mountinfo {
     /// Mount pathname relative to the process's root.
     pub mount_point: PathBuf,
@@ -102,12 +102,12 @@ pub fn mountinfo_self() -> Vec<Mountinfo> {
 }
 
 /// The standard, original cgroup implementation. Often referred to as "cgroupv1".
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct V1 {
     mountinfo: Vec<Mountinfo>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct V2 {
     root: String,
 }

src/lib.rs

@@ -365,11 +365,9 @@ where
             .map(|file| {
                 let bf = BufReader::new(file);
                 let mut v = Vec::new();
-                for line in bf.lines() {
-                    if let Ok(line) = line {
-                        let n = line.trim().parse().unwrap_or(0u64);
-                        v.push(n);
-                    }
+                for line in bf.lines().flatten() {
+                    let n = line.trim().parse().unwrap_or(0u64);
+                    v.push(n);
                 }
                 v.into_iter().map(CgroupPid::from).collect()
             })
@@ -383,7 +381,7 @@ where
 
 // remove_dir aims to remove cgroup path. It does so recursively,
 // by removing any subdirectories (sub-cgroups) first.
-fn remove_dir(dir: &PathBuf) -> Result<()> {
+fn remove_dir(dir: &Path) -> Result<()> {
     // try the fast path first.
     if fs::remove_dir(dir).is_ok() {
         return Ok(());
@@ -740,6 +738,7 @@ impl Default for MaxValue {
 }
 
 impl MaxValue {
+    #[allow(clippy::should_implement_trait, clippy::wrong_self_convention)]
     fn to_i64(&self) -> i64 {
         match self {
             MaxValue::Max => -1,

tests/cpuset.rs

@@ -36,12 +36,12 @@ fn test_cpuset_set_cpus() {
             assert_eq!(0, set.cpus.len());
         } else {
             // for cgroup v1, cpuset is copied from parent.
-            assert_eq!(true, !set.cpus.is_empty());
+            assert!(!set.cpus.is_empty());
         }
 
         // 0
         let r = cpuset.set_cpus("0");
-        assert_eq!(true, r.is_ok());
+        assert!(r.is_ok());
 
         let set = cpuset.cpuset();
         assert_eq!(1, set.cpus.len());
@@ -52,7 +52,7 @@ fn test_cpuset_set_cpus() {
         let cpus = cpus.trim();
         if !cpus.is_empty() {
             let r = cpuset.set_cpus(&cpus);
-            assert_eq!(true, r.is_ok());
+            assert!(r.is_ok());
             let set = cpuset.cpuset();
             assert_eq!(1, set.cpus.len());
             assert_eq!(format!("{}-{}", set.cpus[0].0, set.cpus[0].1), cpus);
@@ -72,14 +72,14 @@ fn test_cpuset_set_cpus_add_task() {
         assert_eq!(0, set.cpus.len());
     } else {
         // for cgroup v1, cpuset is copied from parent.
-        assert_eq!(true, !set.cpus.is_empty());
+        assert!(!set.cpus.is_empty());
     }
 
     // Add a task to the control group.
     let pid_i = libc::pid_t::from(nix::unistd::getpid()) as u64;
     let _ = cg.add_task(CgroupPid::from(pid_i));
     let tasks = cg.tasks();
-    assert_eq!(true, !tasks.is_empty());
+    assert!(!tasks.is_empty());
     println!("tasks after added: {:?}", tasks);
 
     // remove task

tests/hugetlb.rs

@@ -29,7 +29,7 @@ fn test_hugetlb_sizes() {
 
         for size in sizes {
             let supported = hugetlb_controller.size_supported(&size);
-            assert_eq!(supported, true);
+            assert!(supported);
             assert_no_error(hugetlb_controller.failcnt(&size));
             assert_no_error(hugetlb_controller.limit_in_bytes(&size));
             assert_no_error(hugetlb_controller.usage_in_bytes(&size));
@@ -40,5 +40,5 @@ fn test_hugetlb_sizes() {
 }
 
 fn assert_no_error(r: Result<u64>) {
-    assert_eq!(!r.is_err(), true)
+    assert!(!r.is_err())
 }

tests/memory.rs

@@ -17,17 +17,17 @@ fn test_disable_oom_killer() {
 
         // before disable
         let m = mem_controller.memory_stat();
-        assert_eq!(m.oom_control.oom_kill_disable, false);
+        assert!(!m.oom_control.oom_kill_disable);
 
         // now only v1
         if !mem_controller.v2() {
             // disable oom killer
             let r = mem_controller.disable_oom_killer();
-            assert_eq!(r.is_err(), false);
+            assert!(!r.is_err());
 
             // after disable
             let m = mem_controller.memory_stat();
-            assert_eq!(m.oom_control.oom_kill_disable, true);
+            assert!(m.oom_control.oom_kill_disable);
         }
     }
     cg.delete().unwrap();
@@ -60,7 +60,7 @@ fn set_mem_v2() {
             max: None,
         };
         let r = mem_controller.set_mem(m);
-        assert_eq!(true, r.is_ok());
+        assert!(r.is_ok());
 
         let m = mem_controller.get_mem().unwrap();
         // get
@@ -77,7 +77,7 @@ fn set_mem_v2() {
             low: None,
         };
         let r = mem_controller.set_mem(m);
-        assert_eq!(true, r.is_ok());
+        assert!(r.is_ok());
 
         let m = mem_controller.get_mem().unwrap();
         // get

tests/resources.rs

@@ -24,7 +24,7 @@ fn pid_resources() {
         // verify
         let pidcontroller: &PidController = cg.controller_of().unwrap();
         let pid_max = pidcontroller.get_pid_max();
-        assert_eq!(pid_max.is_ok(), true);
+        assert!(pid_max.is_ok());
         assert_eq!(pid_max.unwrap(), MaxValue::Value(512));
     }
     cg.delete().unwrap();