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-rw-r--r--test/syscalls/linux/stat_times.cc303
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diff --git a/test/syscalls/linux/stat_times.cc b/test/syscalls/linux/stat_times.cc
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-// Copyright 2018 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 <fcntl.h>
-#include <sys/stat.h>
-
-#include <tuple>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-using ::testing::IsEmpty;
-using ::testing::Not;
-
-std::tuple<absl::Time, absl::Time, absl::Time> GetTime(const TempPath& file) {
- struct stat statbuf = {};
- EXPECT_THAT(stat(file.path().c_str(), &statbuf), SyscallSucceeds());
-
- const auto atime = absl::TimeFromTimespec(statbuf.st_atim);
- const auto mtime = absl::TimeFromTimespec(statbuf.st_mtim);
- const auto ctime = absl::TimeFromTimespec(statbuf.st_ctim);
- return std::make_tuple(atime, mtime, ctime);
-}
-
-enum class AtimeEffect {
- Unchanged,
- Changed,
-};
-
-enum class MtimeEffect {
- Unchanged,
- Changed,
-};
-
-enum class CtimeEffect {
- Unchanged,
- Changed,
-};
-
-// Tests that fn modifies the atime/mtime/ctime of path as specified.
-void CheckTimes(const TempPath& path, std::function<void()> fn,
- AtimeEffect atime_effect, MtimeEffect mtime_effect,
- CtimeEffect ctime_effect) {
- absl::Time atime, mtime, ctime;
- std::tie(atime, mtime, ctime) = GetTime(path);
-
- // FIXME(b/132819225): gVisor filesystem timestamps inconsistently use the
- // internal or host clock, which may diverge slightly. Allow some slack on
- // times to account for the difference.
- //
- // Here we sleep for 1s so that initial creation of path doesn't fall within
- // the before slack window.
- absl::SleepFor(absl::Seconds(1));
-
- const absl::Time before = absl::Now() - absl::Seconds(1);
-
- // Perform the op.
- fn();
-
- const absl::Time after = absl::Now() + absl::Seconds(1);
-
- absl::Time atime2, mtime2, ctime2;
- std::tie(atime2, mtime2, ctime2) = GetTime(path);
-
- if (atime_effect == AtimeEffect::Changed) {
- EXPECT_LE(before, atime2);
- EXPECT_GE(after, atime2);
- EXPECT_GT(atime2, atime);
- } else {
- EXPECT_EQ(atime2, atime);
- }
-
- if (mtime_effect == MtimeEffect::Changed) {
- EXPECT_LE(before, mtime2);
- EXPECT_GE(after, mtime2);
- EXPECT_GT(mtime2, mtime);
- } else {
- EXPECT_EQ(mtime2, mtime);
- }
-
- if (ctime_effect == CtimeEffect::Changed) {
- EXPECT_LE(before, ctime2);
- EXPECT_GE(after, ctime2);
- EXPECT_GT(ctime2, ctime);
- } else {
- EXPECT_EQ(ctime2, ctime);
- }
-}
-
-// File creation time is reflected in atime, mtime, and ctime.
-TEST(StatTimesTest, FileCreation) {
- const DisableSave ds; // Timing-related test.
-
- // Get a time for when the file is created.
- //
- // FIXME(b/132819225): See above.
- const absl::Time before = absl::Now() - absl::Seconds(1);
- const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- const absl::Time after = absl::Now() + absl::Seconds(1);
-
- absl::Time atime, mtime, ctime;
- std::tie(atime, mtime, ctime) = GetTime(file);
-
- EXPECT_LE(before, atime);
- EXPECT_LE(before, mtime);
- EXPECT_LE(before, ctime);
- EXPECT_GE(after, atime);
- EXPECT_GE(after, mtime);
- EXPECT_GE(after, ctime);
-}
-
-// Calling chmod on a file changes ctime.
-TEST(StatTimesTest, FileChmod) {
- TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- auto fn = [&] {
- EXPECT_THAT(chmod(file.path().c_str(), 0666), SyscallSucceeds());
- };
- CheckTimes(file, fn, AtimeEffect::Unchanged, MtimeEffect::Unchanged,
- CtimeEffect::Changed);
-}
-
-// Renaming a file changes ctime.
-TEST(StatTimesTest, FileRename) {
- TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- const std::string newpath = NewTempAbsPath();
-
- auto fn = [&] {
- ASSERT_THAT(rename(file.release().c_str(), newpath.c_str()),
- SyscallSucceeds());
- file.reset(newpath);
- };
- CheckTimes(file, fn, AtimeEffect::Unchanged, MtimeEffect::Unchanged,
- CtimeEffect::Changed);
-}
-
-// Renaming a file changes ctime, even with an open FD.
-//
-// NOTE(b/132732387): This is a regression test for fs/gofer failing to update
-// cached ctime.
-TEST(StatTimesTest, FileRenameOpenFD) {
- TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Holding an FD shouldn't affect behavior.
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDONLY));
-
- const std::string newpath = NewTempAbsPath();
-
- // FIXME(b/132814682): Restore fails with an uncached gofer and an open FD
- // across rename.
- //
- // N.B. The logic here looks backwards because it isn't possible to
- // conditionally disable save, only conditionally re-enable it.
- DisableSave ds;
- if (!getenv("GVISOR_GOFER_UNCACHED")) {
- ds.reset();
- }
-
- auto fn = [&] {
- ASSERT_THAT(rename(file.release().c_str(), newpath.c_str()),
- SyscallSucceeds());
- file.reset(newpath);
- };
- CheckTimes(file, fn, AtimeEffect::Unchanged, MtimeEffect::Unchanged,
- CtimeEffect::Changed);
-}
-
-// Calling utimes on a file changes ctime and the time that we ask to change
-// (atime to now in this case).
-TEST(StatTimesTest, FileUtimes) {
- TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- auto fn = [&] {
- const struct timespec ts[2] = {{0, UTIME_NOW}, {0, UTIME_OMIT}};
- ASSERT_THAT(utimensat(AT_FDCWD, file.path().c_str(), ts, 0),
- SyscallSucceeds());
- };
- CheckTimes(file, fn, AtimeEffect::Changed, MtimeEffect::Unchanged,
- CtimeEffect::Changed);
-}
-
-// Truncating a file changes mtime and ctime.
-TEST(StatTimesTest, FileTruncate) {
- const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(
- TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), "yaaass", 0666));
-
- auto fn = [&] {
- EXPECT_THAT(truncate(file.path().c_str(), 0), SyscallSucceeds());
- };
- CheckTimes(file, fn, AtimeEffect::Unchanged, MtimeEffect::Changed,
- CtimeEffect::Changed);
-}
-
-// Writing a file changes mtime and ctime.
-TEST(StatTimesTest, FileWrite) {
- const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(
- TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), "yaaass", 0666));
-
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR, 0));
-
- auto fn = [&] {
- const std::string contents = "all the single dollars";
- EXPECT_THAT(WriteFd(fd.get(), contents.data(), contents.size()),
- SyscallSucceeds());
- };
- CheckTimes(file, fn, AtimeEffect::Unchanged, MtimeEffect::Changed,
- CtimeEffect::Changed);
-}
-
-// Reading a file changes atime.
-TEST(StatTimesTest, FileRead) {
- const std::string contents = "bills bills bills";
- const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(
- TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), contents, 0666));
-
- const FileDescriptor fd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDONLY, 0));
-
- auto fn = [&] {
- char buf[20];
- ASSERT_THAT(ReadFd(fd.get(), buf, sizeof(buf)),
- SyscallSucceedsWithValue(contents.size()));
- };
- CheckTimes(file, fn, AtimeEffect::Changed, MtimeEffect::Unchanged,
- CtimeEffect::Unchanged);
-}
-
-// Listing files in a directory changes atime.
-TEST(StatTimesTest, DirList) {
- const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- const TempPath file =
- ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path()));
-
- auto fn = [&] {
- const auto contents = ASSERT_NO_ERRNO_AND_VALUE(ListDir(dir.path(), false));
- EXPECT_THAT(contents, Not(IsEmpty()));
- };
- CheckTimes(dir, fn, AtimeEffect::Changed, MtimeEffect::Unchanged,
- CtimeEffect::Unchanged);
-}
-
-// Creating a file in a directory changes mtime and ctime.
-TEST(StatTimesTest, DirCreateFile) {
- const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
-
- TempPath file;
- auto fn = [&] {
- file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path()));
- };
- CheckTimes(dir, fn, AtimeEffect::Unchanged, MtimeEffect::Changed,
- CtimeEffect::Changed);
-}
-
-// Creating a directory in a directory changes mtime and ctime.
-TEST(StatTimesTest, DirCreateDir) {
- const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
-
- TempPath dir2;
- auto fn = [&] {
- dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(dir.path()));
- };
- CheckTimes(dir, fn, AtimeEffect::Unchanged, MtimeEffect::Changed,
- CtimeEffect::Changed);
-}
-
-// Removing a file from a directory changes mtime and ctime.
-TEST(StatTimesTest, DirRemoveFile) {
- const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
-
- TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path()));
- auto fn = [&] { file.reset(); };
- CheckTimes(dir, fn, AtimeEffect::Unchanged, MtimeEffect::Changed,
- CtimeEffect::Changed);
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor