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Diffstat (limited to 'test/util/cgroup_util.h')
-rw-r--r-- | test/util/cgroup_util.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/test/util/cgroup_util.h b/test/util/cgroup_util.h deleted file mode 100644 index e3f696a89..000000000 --- a/test/util/cgroup_util.h +++ /dev/null @@ -1,123 +0,0 @@ -// Copyright 2021 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef GVISOR_TEST_UTIL_CGROUP_UTIL_H_ -#define GVISOR_TEST_UTIL_CGROUP_UTIL_H_ - -#include <unistd.h> - -#include "absl/container/flat_hash_map.h" -#include "absl/container/flat_hash_set.h" -#include "absl/strings/string_view.h" -#include "test/util/cleanup.h" -#include "test/util/fs_util.h" -#include "test/util/temp_path.h" - -namespace gvisor { -namespace testing { - -// Cgroup represents a cgroup directory on a mounted cgroupfs. -class Cgroup { - public: - Cgroup(std::string_view path); - - uint64_t id() const { return id_; } - - const std::string& Path() const { return cgroup_path_; } - - std::string Relpath(absl::string_view leaf) const { - return JoinPath(cgroup_path_, leaf); - } - - // Returns the contents of a cgroup control file with the given name. - PosixErrorOr<std::string> ReadControlFile(absl::string_view name) const; - - // Reads the contents of a cgroup control with the given name, and attempts - // to parse it as an integer. - PosixErrorOr<int64_t> ReadIntegerControlFile(absl::string_view name) const; - - // Writes a string to a cgroup control file. - PosixError WriteControlFile(absl::string_view name, - const std::string& value) const; - - // Writes an integer value to a cgroup control file. - PosixError WriteIntegerControlFile(absl::string_view name, - int64_t value) const; - - // Returns the thread ids of the leaders of thread groups managed by this - // cgroup. - PosixErrorOr<absl::flat_hash_set<pid_t>> Procs() const; - - PosixErrorOr<absl::flat_hash_set<pid_t>> Tasks() const; - - // ContainsCallingProcess checks whether the calling process is part of the - PosixError ContainsCallingProcess() const; - - private: - PosixErrorOr<absl::flat_hash_set<pid_t>> ParsePIDList( - absl::string_view data) const; - - static int64_t next_id_; - int64_t id_; - const std::string cgroup_path_; -}; - -// Mounter is a utility for creating cgroupfs mounts. It automatically manages -// the lifetime of created mounts. -class Mounter { - public: - Mounter(TempPath root) : root_(std::move(root)) {} - - PosixErrorOr<Cgroup> MountCgroupfs(std::string mopts); - - PosixError Unmount(const Cgroup& c); - - void release(const Cgroup& c); - - private: - // The destruction order of these members avoids errors during cleanup. We - // first unmount (by executing the mounts_ cleanups), then delete the - // mountpoint subdirs, then delete the root. - TempPath root_; - absl::flat_hash_map<int64_t, TempPath> mountpoints_; - absl::flat_hash_map<int64_t, Cleanup> mounts_; -}; - -// Represents a line from /proc/cgroups. -struct CgroupsEntry { - std::string subsys_name; - uint32_t hierarchy; - uint64_t num_cgroups; - bool enabled; -}; - -// Returns a parsed representation of /proc/cgroups. -PosixErrorOr<absl::flat_hash_map<std::string, CgroupsEntry>> -ProcCgroupsEntries(); - -// Represents a line from /proc/<pid>/cgroup. -struct PIDCgroupEntry { - uint32_t hierarchy; - std::string controllers; - std::string path; -}; - -// Returns a parsed representation of /proc/<pid>/cgroup. -PosixErrorOr<absl::flat_hash_map<std::string, PIDCgroupEntry>> -ProcPIDCgroupEntries(pid_t pid); - -} // namespace testing -} // namespace gvisor - -#endif // GVISOR_TEST_UTIL_CGROUP_UTIL_H_ |