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libprocessgroup: limit libprocessgroup's VNDK API surface

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Limit libprocessgroup VNDK API to the minimum set required for task
profiles usage. This API allows vendors to use cgroups without accessing
cgroup files directly, therefore allowing Android to change cgroup
arrangement details without breaking vendor code.

Bug: 131098932
Test: build and boot
Change-Id: I92463dfb44a108a133bafd2fe52237b6b1d50a69
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
This commit is contained in:
Suren Baghdasaryan 2019-04-22 13:12:13 -07:00
parent 1a043459a9
commit 3bdf315eae
1 changed files with 8 additions and 3 deletions
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11
libprocessgroup/include/processgroup/processgroup.h
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@ -24,18 +24,21 @@
__BEGIN_DECLS
static constexpr const char* CGROUPV2_CONTROLLER_NAME = "cgroup2";
static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
bool CgroupGetControllerPath(const std::string& cgroup_name, std::string* path);
bool CgroupGetAttributePath(const std::string& attr_name, std::string* path);
bool CgroupGetAttributePathForTask(const std::string& attr_name, int tid, std::string* path);
bool UsePerAppMemcg();
bool SetTaskProfiles(int tid, const std::vector<std::string>& profiles, bool use_fd_cache = false);
bool SetProcessProfiles(uid_t uid, pid_t pid, const std::vector<std::string>& profiles,
bool use_fd_cache = false);
#ifndef __ANDROID_VNDK__
static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
bool UsePerAppMemcg();
// Return 0 and removes the cgroup if there are no longer any processes in it.
// Returns -1 in the case of an error occurring or if there are processes still running
// even after retrying for up to 200ms.
@ -55,4 +58,6 @@ bool setProcessGroupLimit(uid_t uid, int initialPid, int64_t limitInBytes);
void removeAllProcessGroups(void);
#endif // __ANDROID_VNDK__
__END_DECLS