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Commit 0bafc999 authored by Suren Baghdasaryan's avatar Suren Baghdasaryan Committed by Automerger Merge Worker
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Merge "libprocessgroup: introduce optional attribute for cgroup controllers"... 

Merge "libprocessgroup: introduce optional attribute for cgroup controllers" am: d9f1884a am: 93e302bb am: e0cf9265 am: 0b090fee

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1625481

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Idb9abd8ea7e8fd58b375f917c07dfebf48c0a1ac
parents e3f1ebd7 0b090fee

libprocessgroup/cgrouprc/include/android/cgrouprc.h

+1 −0
Original line number Diff line number Diff line
@@ -68,6 +68,7 @@ __attribute__((warn_unused_result)) uint32_t ACgroupController_getVersion(const 
 */

#define CGROUPRC_CONTROLLER_FLAG_MOUNTED 0x1

#define CGROUPRC_CONTROLLER_FLAG_NEEDS_ACTIVATION 0x2

#define CGROUPRC_CONTROLLER_FLAG_OPTIONAL 0x4



/**

 * Returns the flags bitmask of the given controller.

libprocessgroup/profiles/cgroups.json

+2 −1
Original line number Diff line number Diff line
@@ -26,7 +26,8 @@ 
      "Path": "/dev/memcg",

      "Mode": "0700",

      "UID": "root",

      "GID": "system"

      "GID": "system",

      "Optional": true

    }

  ],

  "Cgroups2": {

libprocessgroup/profiles/cgroups.proto

+2 −1
Original line number Diff line number Diff line
@@ -24,7 +24,7 @@ message Cgroups { 
    Cgroups2 cgroups2 = 2 [json_name = "Cgroups2"];

}



// Next: 7

// Next: 8

message Cgroup {

    string controller = 1 [json_name = "Controller"];

    string path = 2 [json_name = "Path"];
@@ -35,6 +35,7 @@ message Cgroup { 
// when a boolean is specified as false, so leave unspecified in that case

// https://developers.google.com/protocol-buffers/docs/proto3#default

    bool needs_activation = 6 [json_name = "NeedsActivation"];

    bool is_optional = 7 [json_name = "Optional"];

}



// Next: 6

libprocessgroup/profiles/cgroups_30.json

+2 −1
Original line number Diff line number Diff line
@@ -5,7 +5,8 @@ 
      "Path": "/dev/stune",

      "Mode": "0755",

      "UID": "system",

      "GID": "system"

      "GID": "system",

      "Optional": true

    }

  ]

}

libprocessgroup/setup/cgroup_map_write.cpp

+13 −2
Original line number Diff line number Diff line
@@ -161,6 +161,10 @@ static void MergeCgroupToDescriptors(std::map<std::string, CgroupDescriptor>* de 
        controller_flags |= CGROUPRC_CONTROLLER_FLAG_NEEDS_ACTIVATION;

    }



    if (cgroup["Optional"].isBool() && cgroup["Optional"].asBool()) {

        controller_flags |= CGROUPRC_CONTROLLER_FLAG_OPTIONAL;

    }



    CgroupDescriptor descriptor(

            cgroups_version, name, path, std::strtoul(cgroup["Mode"].asString().c_str(), 0, 8),

            cgroup["UID"].asString(), cgroup["GID"].asString(), controller_flags);
@@ -308,9 +312,16 @@ static bool SetupCgroup(const CgroupDescriptor& descriptor) { 
    }



    if (result < 0) {

        bool optional = controller->flags() & CGROUPRC_CONTROLLER_FLAG_OPTIONAL;



        if (optional && errno == EINVAL) {

            // Optional controllers are allowed to fail to mount if kernel does not support them

            LOG(INFO) << "Optional " << controller->name() << " cgroup controller is not mounted";

        } else {

            PLOG(ERROR) << "Failed to mount " << controller->name() << " cgroup";

            return false;

        }

    }



    return true;

}