1 files changed, 0 insertions, 236 deletions
diff --git a/test/util/cgroup_util.cc b/test/util/cgroup_util.cc
deleted file mode 100644
index 04d4f8de0..000000000
--- a/test/util/cgroup_util.cc
+++ /dev/null
@@ -1,236 +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.
-
-#include "test/util/cgroup_util.h"
-
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "test/util/fs_util.h"
-#include "test/util/mount_util.h"
-
-namespace gvisor {
-namespace testing {
-
-Cgroup::Cgroup(std::string_view path) : cgroup_path_(path) {
-  id_ = ++Cgroup::next_id_;
-  std::cerr << absl::StreamFormat("[cg#%d] <= %s", id_, cgroup_path_)
-            << std::endl;
-}
-
-PosixErrorOr<std::string> Cgroup::ReadControlFile(
-    absl::string_view name) const {
-  std::string buf;
-  RETURN_IF_ERRNO(GetContents(Relpath(name), &buf));
-
-  const std::string alias_path = absl::StrFormat("[cg#%d]/%s", id_, name);
-  std::cerr << absl::StreamFormat("<contents of %s>", alias_path) << std::endl;
-  std::cerr << buf;
-  std::cerr << absl::StreamFormat("<end of %s>", alias_path) << std::endl;
-
-  return buf;
-}
-
-PosixErrorOr<int64_t> Cgroup::ReadIntegerControlFile(
-    absl::string_view name) const {
-  ASSIGN_OR_RETURN_ERRNO(const std::string buf, ReadControlFile(name));
-  ASSIGN_OR_RETURN_ERRNO(const int64_t val, Atoi<int64_t>(buf));
-  return val;
-}
-
-PosixError Cgroup::WriteControlFile(absl::string_view name,
-                                    const std::string& value) const {
-  ASSIGN_OR_RETURN_ERRNO(FileDescriptor fd, Open(Relpath(name), O_WRONLY));
-  RETURN_ERROR_IF_SYSCALL_FAIL(WriteFd(fd.get(), value.c_str(), value.size()));
-  return NoError();
-}
-
-PosixError Cgroup::WriteIntegerControlFile(absl::string_view name,
-                                           int64_t value) const {
-  return WriteControlFile(name, absl::StrCat(value));
-}
-
-PosixErrorOr<absl::flat_hash_set<pid_t>> Cgroup::Procs() const {
-  ASSIGN_OR_RETURN_ERRNO(std::string buf, ReadControlFile("cgroup.procs"));
-  return ParsePIDList(buf);
-}
-
-PosixErrorOr<absl::flat_hash_set<pid_t>> Cgroup::Tasks() const {
-  ASSIGN_OR_RETURN_ERRNO(std::string buf, ReadControlFile("tasks"));
-  return ParsePIDList(buf);
-}
-
-PosixError Cgroup::ContainsCallingProcess() const {
-  ASSIGN_OR_RETURN_ERRNO(const absl::flat_hash_set<pid_t> procs, Procs());
-  ASSIGN_OR_RETURN_ERRNO(const absl::flat_hash_set<pid_t> tasks, Tasks());
-  const pid_t pid = getpid();
-  const pid_t tid = syscall(SYS_gettid);
-  if (!procs.contains(pid)) {
-    return PosixError(
-        ENOENT, absl::StrFormat("Cgroup doesn't contain process %d", pid));
-  }
-  if (!tasks.contains(tid)) {
-    return PosixError(ENOENT,
-                      absl::StrFormat("Cgroup doesn't contain task %d", tid));
-  }
-  return NoError();
-}
-
-PosixErrorOr<absl::flat_hash_set<pid_t>> Cgroup::ParsePIDList(
-    absl::string_view data) const {
-  absl::flat_hash_set<pid_t> res;
-  std::vector<absl::string_view> lines = absl::StrSplit(data, '\n');
-  for (const std::string_view& line : lines) {
-    if (line.empty()) {
-      continue;
-    }
-    ASSIGN_OR_RETURN_ERRNO(const int32_t pid, Atoi<int32_t>(line));
-    res.insert(static_cast<pid_t>(pid));
-  }
-  return res;
-}
-
-int64_t Cgroup::next_id_ = 0;
-
-PosixErrorOr<Cgroup> Mounter::MountCgroupfs(std::string mopts) {
-  ASSIGN_OR_RETURN_ERRNO(TempPath mountpoint,
-                         TempPath::CreateDirIn(root_.path()));
-  ASSIGN_OR_RETURN_ERRNO(
-      Cleanup mount, Mount("none", mountpoint.path(), "cgroup", 0, mopts, 0));
-  const std::string mountpath = mountpoint.path();
-  std::cerr << absl::StreamFormat(
-                   "Mount(\"none\", \"%s\", \"cgroup\", 0, \"%s\", 0) => OK",
-                   mountpath, mopts)
-            << std::endl;
-  Cgroup cg = Cgroup(mountpath);
-  mountpoints_[cg.id()] = std::move(mountpoint);
-  mounts_[cg.id()] = std::move(mount);
-  return cg;
-}
-
-PosixError Mounter::Unmount(const Cgroup& c) {
-  auto mount = mounts_.find(c.id());
-  auto mountpoint = mountpoints_.find(c.id());
-
-  if (mount == mounts_.end() || mountpoint == mountpoints_.end()) {
-    return PosixError(
-        ESRCH, absl::StrFormat("No mount found for cgroupfs containing cg#%d",
-                               c.id()));
-  }
-
-  std::cerr << absl::StreamFormat("Unmount([cg#%d])", c.id()) << std::endl;
-
-  // Simply delete the entries, their destructors will unmount and delete the
-  // mountpoint. Note the order is important to avoid errors: mount then
-  // mountpoint.
-  mounts_.erase(mount);
-  mountpoints_.erase(mountpoint);
-
-  return NoError();
-}
-
-constexpr char kProcCgroupsHeader[] =
-    "#subsys_name\thierarchy\tnum_cgroups\tenabled";
-
-PosixErrorOr<absl::flat_hash_map<std::string, CgroupsEntry>>
-ProcCgroupsEntries() {
-  std::string content;
-  RETURN_IF_ERRNO(GetContents("/proc/cgroups", &content));
-
-  bool found_header = false;
-  absl::flat_hash_map<std::string, CgroupsEntry> entries;
-  std::vector<std::string> lines = absl::StrSplit(content, '\n');
-  std::cerr << "<contents of /proc/cgroups>" << std::endl;
-  for (const std::string& line : lines) {
-    std::cerr << line << std::endl;
-
-    if (!found_header) {
-      EXPECT_EQ(line, kProcCgroupsHeader);
-      found_header = true;
-      continue;
-    }
-    if (line.empty()) {
-      continue;
-    }
-
-    // Parse a single entry from /proc/cgroups.
-    //
-    // Example entries, fields are tab separated in the real file:
-    //
-    // #subsys_name    hierarchy       num_cgroups     enabled
-    // cpuset  12      35      1
-    // cpu     3       222     1
-    //   ^     ^       ^       ^
-    //   0     1       2       3
-
-    CgroupsEntry entry;
-    std::vector<std::string> fields =
-        StrSplit(line, absl::ByAnyChar(": \t"), absl::SkipEmpty());
-
-    entry.subsys_name = fields[0];
-    ASSIGN_OR_RETURN_ERRNO(entry.hierarchy, Atoi<uint32_t>(fields[1]));
-    ASSIGN_OR_RETURN_ERRNO(entry.num_cgroups, Atoi<uint64_t>(fields[2]));
-    ASSIGN_OR_RETURN_ERRNO(const int enabled, Atoi<int>(fields[3]));
-    entry.enabled = enabled != 0;
-
-    entries[entry.subsys_name] = entry;
-  }
-  std::cerr << "<end of /proc/cgroups>" << std::endl;
-
-  return entries;
-}
-
-PosixErrorOr<absl::flat_hash_map<std::string, PIDCgroupEntry>>
-ProcPIDCgroupEntries(pid_t pid) {
-  const std::string path = absl::StrFormat("/proc/%d/cgroup", pid);
-  std::string content;
-  RETURN_IF_ERRNO(GetContents(path, &content));
-
-  absl::flat_hash_map<std::string, PIDCgroupEntry> entries;
-  std::vector<std::string> lines = absl::StrSplit(content, '\n');
-
-  std::cerr << absl::StreamFormat("<contents of %s>", path) << std::endl;
-  for (const std::string& line : lines) {
-    std::cerr << line << std::endl;
-
-    if (line.empty()) {
-      continue;
-    }
-
-    // Parse a single entry from /proc/<pid>/cgroup.
-    //
-    // Example entries:
-    //
-    // 2:cpu:/path/to/cgroup
-    // 1:memory:/
-
-    PIDCgroupEntry entry;
-    std::vector<std::string> fields =
-        absl::StrSplit(line, absl::ByChar(':'), absl::SkipEmpty());
-
-    ASSIGN_OR_RETURN_ERRNO(entry.hierarchy, Atoi<uint32_t>(fields[0]));
-    entry.controllers = fields[1];
-    entry.path = fields[2];
-
-    entries[entry.controllers] = entry;
-  }
-  std::cerr << absl::StreamFormat("<end of %s>", path) << std::endl;
-
-  return entries;
-}
-
-}  // namespace testing
-}  // namespace gvisor