!59 fix: enable subtree_control for sub cgroup on hongmeng

From: @licunlong 
Reviewed-by: @jiayi0118 
Signed-off-by: @jiayi0118

backport-fix-enable-subtree_control-for-sub-cgroup-on-hongmen.patch

@@ -0,0 +1,52 @@
+From b95071b3d24ef2211b3fed059d31497cd62ccbb6 Mon Sep 17 00:00:00 2001
+From: licunlong <licunlong1@huawei.com>
+Date: Thu, 24 Aug 2023 16:01:24 +0800
+Subject: [PATCH] fix: enable subtree_control for sub cgroup on hongmeng
+
+---
+ core/sysmaster/src/main.rs        |  5 +++++
+ core/sysmaster/src/mount/setup.rs | 12 ++++++++++++
+ 2 files changed, 17 insertions(+)
+
+diff --git a/core/sysmaster/src/main.rs b/core/sysmaster/src/main.rs
+index 95aea65b..7d30fb64 100755
+--- a/core/sysmaster/src/main.rs
++++ b/core/sysmaster/src/main.rs
+@@ -146,6 +146,11 @@ fn initialize_runtime(self_recovery_enable: bool) -> Result<()> {
+         msg: format!("mount cgroup controllers failed: {}", e),
+     })?;
+ 
++    #[cfg(feature = "hongmeng")]
++    setup::enable_subtree_control(cgroup::CG_BASE_DIR).map_err(|e| Error::Other {
++        msg: format!("enable hongmeng resmgr subtree_control failed: {}", e),
++    })?;
++
+     set_child_reaper();
+ 
+     Ok(())
+diff --git a/core/sysmaster/src/mount/setup.rs b/core/sysmaster/src/mount/setup.rs
+index 953ff4d9..56efdac4 100755
+--- a/core/sysmaster/src/mount/setup.rs
++++ b/core/sysmaster/src/mount/setup.rs
+@@ -460,6 +460,18 @@ pub fn mount_cgroup_controllers() -> Result<()> {
+     Ok(())
+ }
+ 
++#[cfg(feature = "hongmeng")]
++/// enable memory controller for sub cgroup
++pub fn enable_subtree_control(cg_base_dir: &str) -> Result<()> {
++    /* hongmeng doesn't enable cgroup controller for sub cgroup. So when we create a directory under
++     * /run/sysmaster/cgroup, i.e. foo.service, the file /run/sysmaster/cgroup/foo.service/controllers
++     * is empty. If controllers file is empty, we can't migrate our process to this cgroup. To avoid
++     * this problem, we forcely enable memory controller for sub cgroup. */
++    let sub_tree_control = Path::new(cg_base_dir).join("subtree_control");
++    fs::write(sub_tree_control, "+memory").context(IoSnafu)?;
++    Ok(())
++}
++
+ // return the pair controller which will join with the original controller
+ fn pair_controller(controller: &str) -> Option<String> {
+     let mut pairs = HashMap::new();
+-- 
+2.30.2
+

sysmaster.spec

@@ -17,7 +17,7 @@
 
 Name:           sysmaster 
 Version:        0.5.0
-Release:        2
+Release:        3
 Summary:        redesign and reimplement process1.
 
 License:        Mulan PSL v2
@@ -30,6 +30,7 @@ Patch2:	backport-fix-devmaster-avoid-coredump-when-rules-directory-is.patch
 Patch3:	backport-fix-device-avoid-inserting-empty-tag.patch
 Patch4:	backport-fix-devmaster-append-trailing-white-line-in-99-defau.patch
 Patch5: backport-fix-disable-User-Group-feature-for-hongmeng.patch
+Patch6: backport-fix-enable-subtree_control-for-sub-cgroup-on-hongmen.patch
 
 ExclusiveArch:  x86_64 aarch64
 
@@ -131,6 +132,9 @@ ln -s /usr/lib/sysmaster/system/sshd.service %{buildroot}/etc/sysmaster/system/m
 %attr(0550,-,-) /usr/lib/devmaster/devmaster
 
 %changelog
+* Fri Aug 25 2023 licunlong<licunlong1@huawei.com> - 0.5.0-3
+- enable subtree_control for sub cgroup on hongmeng
+
 * Wed Aug 23 2023 licunlong<licunlong1@huawei.com> - 0.5.0-2
 - disable User/Group on hongmeng