Add support for multiple controller mount to same point

(cherry picked from commit 3874189ca454292a222194033c3802978f0f9642)

Add-support-for-multiple-controllers-on-same-mount-point.patch

@@ -0,0 +1,73 @@
+From d9c7eee7cbae3de3b092fc317ff3e002e1a02bf9 Mon Sep 17 00:00:00 2001
+From: lipengyu <lipengyu@kylinos.cn>
+Date: Fri, 6 Dec 2024 14:38:39 +0800
+Subject: [PATCH] support-for-multiple-controller-nount-to-same-point
+
+---
+ src/config.c | 29 ++++++++++++++++++++++++++++-
+ 1 file changed, 28 insertions(+), 1 deletion(-)
+
+diff --git a/src/config.c b/src/config.c
+index 7678578..4d33b0d 100644
+--- a/src/config.c
++++ b/src/config.c
+@@ -629,6 +629,22 @@ void cgroup_config_cleanup_namespace_table(void)
+ 	memset(&config_namespace_table, 0, sizeof(struct cg_mount_table_s) * CG_CONTROLLER_MAX);
+ }
+ 
++static int is_valid_controller(char *ctrl)
++{
++	int i;
++
++	static const char *ctrl_list[] = { "blkio", "cpu", "cpuacct", "cpuset", "devices",
++					"freezer", "hugetlb", "memory", "misc", "net_cls",
++					"net_prio", "perf_event", "pids", "rdma", NULL };
++
++	for (i = 0; ctrl_list[i]; i++) {
++		if (strncmp(ctrl, ctrl_list[i], strlen(ctrl_list[i])) == 0)
++			return 1;
++	}
++
++	return 0;
++}
++
+ /**
+  * Add necessary options for mount. Currently only 'none' option is added
+  * for mounts with only 'name=xxx' and without real controller.
+@@ -657,6 +673,9 @@ static int cgroup_config_ajdust_mount_options(struct cg_mount_table_s *mount, un
+ 
+ 				strncpy(mount->name, controller, sizeof(mount->name));
+ 				mount->name[sizeof(mount->name)-1] = '\0';
++				free(controller);
++				token = strtok_r(NULL, ",", &save);
++				continue;
+ 			}
+ 
+ 			if (strncmp(token, "nodev", strlen("nodev")) == 0)
+@@ -668,6 +687,15 @@ static int cgroup_config_ajdust_mount_options(struct cg_mount_table_s *mount, un
+ 			if (strncmp(token, "nosuid", strlen("nosuid")) == 0)
+ 				*flags |= MS_NOSUID;
+ 
++			if (is_valid_controller(token)) {
++				controller = strdup(token);
++				if (controller == NULL)
++					break;
++				strncat(mount->name, ",", FILENAME_MAX - strlen(mount->name)-1);
++				strncat(mount->name, controller, FILENAME_MAX - strlen(mount->name) - 1);
++				free(controller);
++			}
++
+ 		} else if (!name_only) {
+ 			/*
+ 			 * We have controller + name=, do the right thing,
+@@ -679,7 +707,6 @@ static int cgroup_config_ajdust_mount_options(struct cg_mount_table_s *mount, un
+ 		token = strtok_r(NULL, ",", &save);
+ 	}
+ 
+-	free(controller);
+ 	free(opts);
+ 
+ 	if (name_only) {
+-- 
+2.25.1
+

libcgroup.spec

@@ -5,7 +5,7 @@
 Summary: Libcgroup is a library that abstracts the control group file system in Linux
 Name: libcgroup
 Version: 3.1.0
-Release: 5
+Release: 6
 License: LGPL-2.1-or-later
 URL: https://libcg.sourceforge.net/
 Source: https://github.com/%{name}/%{name}/archive/v%{version}/%{name}-%{version}.tar.gz
@@ -15,6 +15,7 @@ Obsoletes: libcgroup-pam = %{version}-%{release}
 Obsoletes: libcgroup-tools < %{version}-%{release}
 
 Patch0: config.patch
+Patch1: Add-support-for-multiple-controllers-on-same-mount-point.patch
 
 BuildRequires: autoconf, automake, libtool
 BuildRequires: gcc,gcc-c++,byacc
@@ -104,6 +105,12 @@ getent group cgred >/dev/null || groupadd -r cgred
 %attr(0644, root, root) %{_mandir}/man8/*
 
 %changelog
+* Tue Nov 26 2024 lipengyu <lipengyu@kylinos.cn> - 3.1.0-6
+- Type:update
+- Id:NA
+- SUG:NA
+- DESC:Add support for multiple controller mount to same point
+
 * Fri Oct 11 2024 Funda Wang <fundawang@yeah.net> - 3.1.0-5
 - apply patch