5b53573671
SetupCgroups is called by init process during early-init stage and is not supposed to be called again by anyone else. Ensure that the caller is the init process, make sure cgroup.rc file is written only one time, keep the file descriptor to cgroup.rc file open by the init process to ensure all its further mappings stay valid even if the file is deleted. Bug: 124774415 Test: build, run, verify no errors or warning in the logcat Change-Id: Ib8822cf0112db7744e28d442182d54dcf06f46f2 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
58 lines
2.3 KiB
C++
58 lines
2.3 KiB
C++
/*
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* Copyright 2014 Google, Inc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <string>
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#include <vector>
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__BEGIN_DECLS
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static constexpr const char* CGROUPV2_CONTROLLER_NAME = "cgroup2";
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static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
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bool CgroupSetupCgroups();
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bool CgroupGetControllerPath(const std::string& cgroup_name, std::string* path);
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bool CgroupGetAttributePath(const std::string& attr_name, std::string* path);
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bool CgroupGetAttributePathForTask(const std::string& attr_name, int tid, std::string* path);
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bool UsePerAppMemcg();
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bool SetTaskProfiles(int tid, const std::vector<std::string>& profiles);
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bool SetProcessProfiles(uid_t uid, pid_t pid, const std::vector<std::string>& profiles);
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// Return 0 and removes the cgroup if there are no longer any processes in it.
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// Returns -1 in the case of an error occurring or if there are processes still running
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// even after retrying for up to 200ms.
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int killProcessGroup(uid_t uid, int initialPid, int signal);
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// Returns the same as killProcessGroup(), however it does not retry, which means
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// that it only returns 0 in the case that the cgroup exists and it contains no processes.
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int killProcessGroupOnce(uid_t uid, int initialPid, int signal);
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int createProcessGroup(uid_t uid, int initialPid, bool memControl = false);
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// Set various properties of a process group. For these functions to work, the process group must
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// have been created by passing memControl=true to createProcessGroup.
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bool setProcessGroupSwappiness(uid_t uid, int initialPid, int swappiness);
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bool setProcessGroupSoftLimit(uid_t uid, int initialPid, int64_t softLimitInBytes);
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bool setProcessGroupLimit(uid_t uid, int initialPid, int64_t limitInBytes);
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void removeAllProcessGroups(void);
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__END_DECLS
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