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-rw-r--r--test/syscalls/linux/utimes.cc320
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diff --git a/test/syscalls/linux/utimes.cc b/test/syscalls/linux/utimes.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 <sys/syscall.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-#include <utime.h>
-
-#include <string>
-
-#include "absl/time/time.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/fs_util.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-// TimeBoxed runs fn, setting before and after to (coarse realtime) times
-// guaranteed* to come before and after fn started and completed, respectively.
-//
-// fn may be called more than once if the clock is adjusted.
-void TimeBoxed(absl::Time* before, absl::Time* after,
- std::function<void()> const& fn) {
- do {
- // N.B. utimes and friends use CLOCK_REALTIME_COARSE for setting time (i.e.,
- // current_kernel_time()). See fs/attr.c:notify_change.
- //
- // notify_change truncates the time to a multiple of s_time_gran, but most
- // filesystems set it to 1, so we don't do any truncation.
- struct timespec ts;
- EXPECT_THAT(clock_gettime(CLOCK_REALTIME_COARSE, &ts), SyscallSucceeds());
- // 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.
- *before = absl::TimeFromTimespec(ts) - absl::Seconds(1);
-
- fn();
-
- EXPECT_THAT(clock_gettime(CLOCK_REALTIME_COARSE, &ts), SyscallSucceeds());
- *after = absl::TimeFromTimespec(ts) + absl::Seconds(1);
-
- if (*after < *before) {
- // Clock jumped backwards; retry.
- //
- // Technically this misses jumps small enough to keep after > before,
- // which could lead to test failures, but that is very unlikely to happen.
- continue;
- }
- } while (*after < *before);
-}
-
-void TestUtimesOnPath(std::string const& path) {
- struct stat statbuf;
-
- struct timeval times[2] = {{10, 0}, {20, 0}};
- EXPECT_THAT(utimes(path.c_str(), times), SyscallSucceeds());
- EXPECT_THAT(stat(path.c_str(), &statbuf), SyscallSucceeds());
- EXPECT_EQ(10, statbuf.st_atime);
- EXPECT_EQ(20, statbuf.st_mtime);
-
- absl::Time before;
- absl::Time after;
- TimeBoxed(&before, &after, [&] {
- EXPECT_THAT(utimes(path.c_str(), nullptr), SyscallSucceeds());
- });
-
- EXPECT_THAT(stat(path.c_str(), &statbuf), SyscallSucceeds());
-
- absl::Time atime = absl::TimeFromTimespec(statbuf.st_atim);
- EXPECT_GE(atime, before);
- EXPECT_LE(atime, after);
-
- absl::Time mtime = absl::TimeFromTimespec(statbuf.st_mtim);
- EXPECT_GE(mtime, before);
- EXPECT_LE(mtime, after);
-}
-
-TEST(UtimesTest, OnFile) {
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- TestUtimesOnPath(f.path());
-}
-
-TEST(UtimesTest, OnDir) {
- auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- TestUtimesOnPath(dir.path());
-}
-
-TEST(UtimesTest, MissingPath) {
- auto path = NewTempAbsPath();
- struct timeval times[2] = {{10, 0}, {20, 0}};
- EXPECT_THAT(utimes(path.c_str(), times), SyscallFailsWithErrno(ENOENT));
-}
-
-void TestFutimesat(int dirFd, std::string const& path) {
- struct stat statbuf;
-
- struct timeval times[2] = {{10, 0}, {20, 0}};
- EXPECT_THAT(futimesat(dirFd, path.c_str(), times), SyscallSucceeds());
- EXPECT_THAT(fstatat(dirFd, path.c_str(), &statbuf, 0), SyscallSucceeds());
- EXPECT_EQ(10, statbuf.st_atime);
- EXPECT_EQ(20, statbuf.st_mtime);
-
- absl::Time before;
- absl::Time after;
- TimeBoxed(&before, &after, [&] {
- EXPECT_THAT(futimesat(dirFd, path.c_str(), nullptr), SyscallSucceeds());
- });
-
- EXPECT_THAT(fstatat(dirFd, path.c_str(), &statbuf, 0), SyscallSucceeds());
-
- absl::Time atime = absl::TimeFromTimespec(statbuf.st_atim);
- EXPECT_GE(atime, before);
- EXPECT_LE(atime, after);
-
- absl::Time mtime = absl::TimeFromTimespec(statbuf.st_mtim);
- EXPECT_GE(mtime, before);
- EXPECT_LE(mtime, after);
-}
-
-TEST(FutimesatTest, OnAbsPath) {
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- TestFutimesat(0, f.path());
-}
-
-TEST(FutimesatTest, OnRelPath) {
- auto d = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(d.path()));
- auto basename = std::string(Basename(f.path()));
- const FileDescriptor dirFd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(d.path(), O_RDONLY | O_DIRECTORY));
- TestFutimesat(dirFd.get(), basename);
-}
-
-TEST(FutimesatTest, InvalidNsec) {
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- struct timeval times[4][2] = {{
- {0, 1}, // Valid
- {1, static_cast<int64_t>(1e7)} // Invalid
- },
- {
- {1, static_cast<int64_t>(1e7)}, // Invalid
- {0, 1} // Valid
- },
- {
- {0, 1}, // Valid
- {1, -1} // Invalid
- },
- {
- {1, -1}, // Invalid
- {0, 1} // Valid
- }};
-
- for (unsigned int i = 0; i < sizeof(times) / sizeof(times[0]); i++) {
- std::cout << "test:" << i << "\n";
- EXPECT_THAT(futimesat(0, f.path().c_str(), times[i]),
- SyscallFailsWithErrno(EINVAL));
- }
-}
-
-void TestUtimensat(int dirFd, std::string const& path) {
- struct stat statbuf;
- const struct timespec times[2] = {{10, 0}, {20, 0}};
- EXPECT_THAT(utimensat(dirFd, path.c_str(), times, 0), SyscallSucceeds());
- EXPECT_THAT(fstatat(dirFd, path.c_str(), &statbuf, 0), SyscallSucceeds());
- EXPECT_EQ(10, statbuf.st_atime);
- EXPECT_EQ(20, statbuf.st_mtime);
-
- // Test setting with UTIME_NOW and UTIME_OMIT.
- struct stat statbuf2;
- const struct timespec times2[2] = {
- {0, UTIME_NOW}, // Should set atime to now.
- {0, UTIME_OMIT} // Should not change mtime.
- };
-
- absl::Time before;
- absl::Time after;
- TimeBoxed(&before, &after, [&] {
- EXPECT_THAT(utimensat(dirFd, path.c_str(), times2, 0), SyscallSucceeds());
- });
-
- EXPECT_THAT(fstatat(dirFd, path.c_str(), &statbuf2, 0), SyscallSucceeds());
-
- absl::Time atime2 = absl::TimeFromTimespec(statbuf2.st_atim);
- EXPECT_GE(atime2, before);
- EXPECT_LE(atime2, after);
-
- absl::Time mtime = absl::TimeFromTimespec(statbuf.st_mtim);
- absl::Time mtime2 = absl::TimeFromTimespec(statbuf2.st_mtim);
- // mtime should not be changed.
- EXPECT_EQ(mtime, mtime2);
-
- // Test setting with times = NULL. Should set both atime and mtime to the
- // current system time.
- struct stat statbuf3;
- TimeBoxed(&before, &after, [&] {
- EXPECT_THAT(utimensat(dirFd, path.c_str(), nullptr, 0), SyscallSucceeds());
- });
-
- EXPECT_THAT(fstatat(dirFd, path.c_str(), &statbuf3, 0), SyscallSucceeds());
-
- absl::Time atime3 = absl::TimeFromTimespec(statbuf3.st_atim);
- EXPECT_GE(atime3, before);
- EXPECT_LE(atime3, after);
-
- absl::Time mtime3 = absl::TimeFromTimespec(statbuf3.st_mtim);
- EXPECT_GE(mtime3, before);
- EXPECT_LE(mtime3, after);
-
- // TODO(b/187074006): atime/mtime may differ with local_gofer_uncached.
- // EXPECT_EQ(atime3, mtime3);
-}
-
-TEST(UtimensatTest, OnAbsPath) {
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- TestUtimensat(0, f.path());
-}
-
-TEST(UtimensatTest, OnRelPath) {
- auto d = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(d.path()));
- auto basename = std::string(Basename(f.path()));
- const FileDescriptor dirFd =
- ASSERT_NO_ERRNO_AND_VALUE(Open(d.path(), O_RDONLY | O_DIRECTORY));
- TestUtimensat(dirFd.get(), basename);
-}
-
-TEST(UtimensatTest, OmitNoop) {
- // Setting both timespecs to UTIME_OMIT on a nonexistant path should succeed.
- auto path = NewTempAbsPath();
- const struct timespec times[2] = {{0, UTIME_OMIT}, {0, UTIME_OMIT}};
- EXPECT_THAT(utimensat(0, path.c_str(), times, 0), SyscallSucceeds());
-}
-
-// Verify that we can actually set atime and mtime to 0.
-TEST(UtimeTest, ZeroAtimeandMtime) {
- const auto tmp_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- const auto tmp_file =
- ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(tmp_dir.path()));
-
- // Stat the file before and after updating atime and mtime.
- struct stat stat_before = {};
- EXPECT_THAT(stat(tmp_file.path().c_str(), &stat_before), SyscallSucceeds());
-
- ASSERT_NE(stat_before.st_atime, 0);
- ASSERT_NE(stat_before.st_mtime, 0);
-
- const struct utimbuf times = {}; // Zero for both atime and mtime.
- EXPECT_THAT(utime(tmp_file.path().c_str(), &times), SyscallSucceeds());
-
- struct stat stat_after = {};
- EXPECT_THAT(stat(tmp_file.path().c_str(), &stat_after), SyscallSucceeds());
-
- // We should see the atime and mtime changed when we set them to 0.
- ASSERT_EQ(stat_after.st_atime, 0);
- ASSERT_EQ(stat_after.st_mtime, 0);
-}
-
-TEST(UtimensatTest, InvalidNsec) {
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- struct timespec times[2][2] = {
- {
- {0, UTIME_OMIT}, // Valid
- {2, static_cast<int64_t>(1e10)} // Invalid
- },
- {
- {2, static_cast<int64_t>(1e10)}, // Invalid
- {0, UTIME_OMIT} // Valid
- }};
-
- for (unsigned int i = 0; i < sizeof(times) / sizeof(times[0]); i++) {
- std::cout << "test:" << i << "\n";
- EXPECT_THAT(utimensat(0, f.path().c_str(), times[i], 0),
- SyscallFailsWithErrno(EINVAL));
- }
-}
-
-TEST(Utimensat, NullPath) {
- // From man utimensat(2):
- // "the Linux utimensat() system call implements a nonstandard feature: if
- // pathname is NULL, then the call modifies the timestamps of the file
- // referred to by the file descriptor dirfd (which may refer to any type of
- // file).
- // Note, however, that the glibc wrapper for utimensat() disallows
- // passing NULL as the value for file: the wrapper function returns the error
- // EINVAL in this case."
- auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(f.path(), O_RDWR));
- struct stat statbuf;
- const struct timespec times[2] = {{10, 0}, {20, 0}};
- // Call syscall directly.
- EXPECT_THAT(syscall(SYS_utimensat, fd.get(), NULL, times, 0),
- SyscallSucceeds());
- EXPECT_THAT(fstatat(0, f.path().c_str(), &statbuf, 0), SyscallSucceeds());
- EXPECT_EQ(10, statbuf.st_atime);
- EXPECT_EQ(20, statbuf.st_mtime);
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor