diff options
Diffstat (limited to 'test/syscalls/linux/xattr.cc')
| -rw-r--r-- | test/syscalls/linux/xattr.cc | 609 |
1 files changed, 609 insertions, 0 deletions
diff --git a/test/syscalls/linux/xattr.cc b/test/syscalls/linux/xattr.cc new file mode 100644 index 000000000..3231732ec --- /dev/null +++ b/test/syscalls/linux/xattr.cc @@ -0,0 +1,609 @@ +// Copyright 2019 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 <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <sys/types.h> +#include <sys/xattr.h> +#include <unistd.h> + +#include <string> +#include <vector> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "absl/container/flat_hash_set.h" +#include "test/syscalls/linux/file_base.h" +#include "test/util/capability_util.h" +#include "test/util/file_descriptor.h" +#include "test/util/posix_error.h" +#include "test/util/temp_path.h" +#include "test/util/test_util.h" + +namespace gvisor { +namespace testing { + +namespace { + +class XattrTest : public FileTest {}; + +TEST_F(XattrTest, XattrNonexistentFile) { + const char* path = "/does/not/exist"; + const char* name = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(ENOENT)); + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENOENT)); + EXPECT_THAT(listxattr(path, nullptr, 0), SyscallFailsWithErrno(ENOENT)); + EXPECT_THAT(removexattr(path, name), SyscallFailsWithErrno(ENOENT)); +} + +TEST_F(XattrTest, XattrNullName) { + const char* path = test_file_name_.c_str(); + + EXPECT_THAT(setxattr(path, nullptr, nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(EFAULT)); + EXPECT_THAT(getxattr(path, nullptr, nullptr, 0), + SyscallFailsWithErrno(EFAULT)); + EXPECT_THAT(removexattr(path, nullptr), SyscallFailsWithErrno(EFAULT)); +} + +TEST_F(XattrTest, XattrEmptyName) { + const char* path = test_file_name_.c_str(); + + EXPECT_THAT(setxattr(path, "", nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(ERANGE)); + EXPECT_THAT(getxattr(path, "", nullptr, 0), SyscallFailsWithErrno(ERANGE)); + EXPECT_THAT(removexattr(path, ""), SyscallFailsWithErrno(ERANGE)); +} + +TEST_F(XattrTest, XattrLargeName) { + const char* path = test_file_name_.c_str(); + std::string name = "user."; + name += std::string(XATTR_NAME_MAX - name.length(), 'a'); + + // An xattr should be whitelisted before it can be accessed--do not allow + // arbitrary xattrs to be read/written in gVisor. + if (!IsRunningOnGvisor()) { + EXPECT_THAT(setxattr(path, name.c_str(), nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(getxattr(path, name.c_str(), nullptr, 0), + SyscallSucceedsWithValue(0)); + } + + name += "a"; + EXPECT_THAT(setxattr(path, name.c_str(), nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(ERANGE)); + EXPECT_THAT(getxattr(path, name.c_str(), nullptr, 0), + SyscallFailsWithErrno(ERANGE)); + EXPECT_THAT(removexattr(path, name.c_str()), SyscallFailsWithErrno(ERANGE)); +} + +TEST_F(XattrTest, XattrInvalidPrefix) { + const char* path = test_file_name_.c_str(); + std::string name(XATTR_NAME_MAX, 'a'); + EXPECT_THAT(setxattr(path, name.c_str(), nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(EOPNOTSUPP)); + EXPECT_THAT(getxattr(path, name.c_str(), nullptr, 0), + SyscallFailsWithErrno(EOPNOTSUPP)); + EXPECT_THAT(removexattr(path, name.c_str()), + SyscallFailsWithErrno(EOPNOTSUPP)); +} + +// Do not allow save/restore cycles after making the test file read-only, as +// the restore will fail to open it with r/w permissions. +TEST_F(XattrTest, XattrReadOnly_NoRandomSave) { + // Drop capabilities that allow us to override file and directory permissions. + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false)); + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false)); + + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + size_t size = sizeof(val); + + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + + DisableSave ds; + ASSERT_NO_ERRNO(testing::Chmod(test_file_name_, S_IRUSR)); + + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), + SyscallFailsWithErrno(EACCES)); + EXPECT_THAT(removexattr(path, name), SyscallFailsWithErrno(EACCES)); + + char buf = '-'; + EXPECT_THAT(getxattr(path, name, &buf, size), SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, val); + + char list[sizeof(name)]; + EXPECT_THAT(listxattr(path, list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); +} + +// Do not allow save/restore cycles after making the test file write-only, as +// the restore will fail to open it with r/w permissions. +TEST_F(XattrTest, XattrWriteOnly_NoRandomSave) { + // Drop capabilities that allow us to override file and directory permissions. + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false)); + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false)); + + DisableSave ds; + ASSERT_NO_ERRNO(testing::Chmod(test_file_name_, S_IWUSR)); + + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + size_t size = sizeof(val); + + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(EACCES)); + + // listxattr will succeed even without read permissions. + char list[sizeof(name)]; + EXPECT_THAT(listxattr(path, list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); + + EXPECT_THAT(removexattr(path, name), SyscallSucceeds()); +} + +TEST_F(XattrTest, XattrTrustedWithNonadmin) { + // TODO(b/148380782): Support setxattr and getxattr with "trusted" prefix. + SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN))); + + const char* path = test_file_name_.c_str(); + const char name[] = "trusted.abc"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(EPERM)); + EXPECT_THAT(removexattr(path, name), SyscallFailsWithErrno(EPERM)); + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, XattrOnDirectory) { + TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(dir.path().c_str(), name, nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(getxattr(dir.path().c_str(), name, nullptr, 0), + SyscallSucceedsWithValue(0)); + + char list[sizeof(name)]; + EXPECT_THAT(listxattr(dir.path().c_str(), list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); + + EXPECT_THAT(removexattr(dir.path().c_str(), name), SyscallSucceeds()); +} + +TEST_F(XattrTest, XattrOnSymlink) { + TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + TempPath link = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateSymlinkTo(dir.path(), test_file_name_)); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(link.path().c_str(), name, nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(getxattr(link.path().c_str(), name, nullptr, 0), + SyscallSucceedsWithValue(0)); + + char list[sizeof(name)]; + EXPECT_THAT(listxattr(link.path().c_str(), list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); + + EXPECT_THAT(removexattr(link.path().c_str(), name), SyscallSucceeds()); +} + +TEST_F(XattrTest, XattrOnInvalidFileTypes) { + const char name[] = "user.test"; + + char char_device[] = "/dev/zero"; + EXPECT_THAT(setxattr(char_device, name, nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(EPERM)); + EXPECT_THAT(getxattr(char_device, name, nullptr, 0), + SyscallFailsWithErrno(ENODATA)); + EXPECT_THAT(listxattr(char_device, nullptr, 0), SyscallSucceedsWithValue(0)); + + // Use tmpfs, where creation of named pipes is supported. + const std::string fifo = NewTempAbsPathInDir("/dev/shm"); + const char* path = fifo.c_str(); + EXPECT_THAT(mknod(path, S_IFIFO | S_IRUSR | S_IWUSR, 0), SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), + SyscallFailsWithErrno(EPERM)); + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); + EXPECT_THAT(listxattr(path, nullptr, 0), SyscallSucceedsWithValue(0)); + EXPECT_THAT(removexattr(path, name), SyscallFailsWithErrno(EPERM)); +} + +TEST_F(XattrTest, SetxattrSizeSmallerThanValue) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + std::vector<char> val = {'a', 'a'}; + size_t size = 1; + EXPECT_THAT(setxattr(path, name, val.data(), size, /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> buf = {'-', '-'}; + std::vector<char> expected_buf = {'a', '-'}; + EXPECT_THAT(getxattr(path, name, buf.data(), buf.size()), + SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, expected_buf); +} + +TEST_F(XattrTest, SetxattrZeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + EXPECT_THAT(setxattr(path, name, &val, 0, /*flags=*/0), SyscallSucceeds()); + + char buf = '-'; + EXPECT_THAT(getxattr(path, name, &buf, XATTR_SIZE_MAX), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(buf, '-'); +} + +TEST_F(XattrTest, SetxattrSizeTooLarge) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + + // Note that each particular fs implementation may stipulate a lower size + // limit, in which case we actually may fail (e.g. error with ENOSPC) for + // some sizes under XATTR_SIZE_MAX. + size_t size = XATTR_SIZE_MAX + 1; + std::vector<char> val(size); + EXPECT_THAT(setxattr(path, name, val.data(), size, /*flags=*/0), + SyscallFailsWithErrno(E2BIG)); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, SetxattrNullValueAndNonzeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 1, /*flags=*/0), + SyscallFailsWithErrno(EFAULT)); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, SetxattrNullValueAndZeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallSucceedsWithValue(0)); +} + +TEST_F(XattrTest, SetxattrValueTooLargeButOKSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + std::vector<char> val(XATTR_SIZE_MAX + 1); + std::fill(val.begin(), val.end(), 'a'); + size_t size = 1; + EXPECT_THAT(setxattr(path, name, val.data(), size, /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> buf = {'-', '-'}; + std::vector<char> expected_buf = {'a', '-'}; + EXPECT_THAT(getxattr(path, name, buf.data(), size), + SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, expected_buf); +} + +TEST_F(XattrTest, SetxattrReplaceWithSmaller) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + std::vector<char> val = {'a', 'a'}; + EXPECT_THAT(setxattr(path, name, val.data(), 2, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name, val.data(), 1, /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> buf = {'-', '-'}; + std::vector<char> expected_buf = {'a', '-'}; + EXPECT_THAT(getxattr(path, name, buf.data(), 2), SyscallSucceedsWithValue(1)); + EXPECT_EQ(buf, expected_buf); +} + +TEST_F(XattrTest, SetxattrReplaceWithLarger) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + std::vector<char> val = {'a', 'a'}; + EXPECT_THAT(setxattr(path, name, val.data(), 1, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name, val.data(), 2, /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> buf = {'-', '-'}; + EXPECT_THAT(getxattr(path, name, buf.data(), 2), SyscallSucceedsWithValue(2)); + EXPECT_EQ(buf, val); +} + +TEST_F(XattrTest, SetxattrCreateFlag) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_CREATE), + SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_CREATE), + SyscallFailsWithErrno(EEXIST)); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallSucceedsWithValue(0)); +} + +TEST_F(XattrTest, SetxattrReplaceFlag) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_REPLACE), + SyscallFailsWithErrno(ENODATA)); + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name, nullptr, 0, XATTR_REPLACE), + SyscallSucceeds()); + + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallSucceedsWithValue(0)); +} + +TEST_F(XattrTest, SetxattrInvalidFlags) { + const char* path = test_file_name_.c_str(); + int invalid_flags = 0xff; + EXPECT_THAT(setxattr(path, nullptr, nullptr, 0, invalid_flags), + SyscallFailsWithErrno(EINVAL)); +} + +TEST_F(XattrTest, Getxattr) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + int val = 1234; + size_t size = sizeof(val); + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + + int buf = 0; + EXPECT_THAT(getxattr(path, name, &buf, size), SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, val); +} + +TEST_F(XattrTest, GetxattrSizeSmallerThanValue) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + std::vector<char> val = {'a', 'a'}; + size_t size = val.size(); + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + + char buf = '-'; + EXPECT_THAT(getxattr(path, name, &buf, 1), SyscallFailsWithErrno(ERANGE)); + EXPECT_EQ(buf, '-'); +} + +TEST_F(XattrTest, GetxattrSizeLargerThanValue) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + EXPECT_THAT(setxattr(path, name, &val, 1, /*flags=*/0), SyscallSucceeds()); + + std::vector<char> buf(XATTR_SIZE_MAX); + std::fill(buf.begin(), buf.end(), '-'); + std::vector<char> expected_buf = buf; + expected_buf[0] = 'a'; + EXPECT_THAT(getxattr(path, name, buf.data(), buf.size()), + SyscallSucceedsWithValue(1)); + EXPECT_EQ(buf, expected_buf); +} + +TEST_F(XattrTest, GetxattrZeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + EXPECT_THAT(setxattr(path, name, &val, sizeof(val), /*flags=*/0), + SyscallSucceeds()); + + char buf = '-'; + EXPECT_THAT(getxattr(path, name, &buf, 0), + SyscallSucceedsWithValue(sizeof(val))); + EXPECT_EQ(buf, '-'); +} + +TEST_F(XattrTest, GetxattrSizeTooLarge) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + EXPECT_THAT(setxattr(path, name, &val, sizeof(val), /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> buf(XATTR_SIZE_MAX + 1); + std::fill(buf.begin(), buf.end(), '-'); + std::vector<char> expected_buf = buf; + expected_buf[0] = 'a'; + EXPECT_THAT(getxattr(path, name, buf.data(), buf.size()), + SyscallSucceedsWithValue(sizeof(val))); + EXPECT_EQ(buf, expected_buf); +} + +TEST_F(XattrTest, GetxattrNullValue) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + size_t size = sizeof(val); + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + + EXPECT_THAT(getxattr(path, name, nullptr, size), + SyscallFailsWithErrno(EFAULT)); +} + +TEST_F(XattrTest, GetxattrNullValueAndZeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + char val = 'a'; + size_t size = sizeof(val); + // Set value with zero size. + EXPECT_THAT(setxattr(path, name, &val, 0, /*flags=*/0), SyscallSucceeds()); + // Get value with nonzero size. + EXPECT_THAT(getxattr(path, name, nullptr, size), SyscallSucceedsWithValue(0)); + + // Set value with nonzero size. + EXPECT_THAT(setxattr(path, name, &val, size, /*flags=*/0), SyscallSucceeds()); + // Get value with zero size. + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallSucceedsWithValue(size)); +} + +TEST_F(XattrTest, GetxattrNonexistentName) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, Listxattr) { + const char* path = test_file_name_.c_str(); + const std::string name = "user.test"; + const std::string name2 = "user.test2"; + const std::string name3 = "user.test3"; + EXPECT_THAT(setxattr(path, name.c_str(), nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name2.c_str(), nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + EXPECT_THAT(setxattr(path, name3.c_str(), nullptr, 0, /*flags=*/0), + SyscallSucceeds()); + + std::vector<char> list(name.size() + 1 + name2.size() + 1 + name3.size() + 1); + char* buf = list.data(); + EXPECT_THAT(listxattr(path, buf, XATTR_SIZE_MAX), + SyscallSucceedsWithValue(list.size())); + + absl::flat_hash_set<std::string> got = {}; + for (char* p = buf; p < buf + list.size(); p += strlen(p) + 1) { + got.insert(std::string{p}); + } + + absl::flat_hash_set<std::string> expected = {name, name2, name3}; + EXPECT_EQ(got, expected); +} + +TEST_F(XattrTest, ListxattrNoXattrs) { + const char* path = test_file_name_.c_str(); + + std::vector<char> list, expected; + EXPECT_THAT(listxattr(path, list.data(), sizeof(list)), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(list, expected); + + // Listxattr should succeed if there are no attributes, even if the buffer + // passed in is a nullptr. + EXPECT_THAT(listxattr(path, nullptr, sizeof(list)), + SyscallSucceedsWithValue(0)); +} + +TEST_F(XattrTest, ListxattrNullBuffer) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + + EXPECT_THAT(listxattr(path, nullptr, sizeof(name)), + SyscallFailsWithErrno(EFAULT)); +} + +TEST_F(XattrTest, ListxattrSizeTooSmall) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + + char list[sizeof(name) - 1]; + EXPECT_THAT(listxattr(path, list, sizeof(list)), + SyscallFailsWithErrno(ERANGE)); +} + +TEST_F(XattrTest, ListxattrZeroSize) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + EXPECT_THAT(listxattr(path, nullptr, 0), + SyscallSucceedsWithValue(sizeof(name))); +} + +TEST_F(XattrTest, RemoveXattr) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(setxattr(path, name, nullptr, 0, /*flags=*/0), SyscallSucceeds()); + EXPECT_THAT(removexattr(path, name), SyscallSucceeds()); + EXPECT_THAT(getxattr(path, name, nullptr, 0), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, RemoveXattrNonexistentName) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + EXPECT_THAT(removexattr(path, name), SyscallFailsWithErrno(ENODATA)); +} + +TEST_F(XattrTest, LXattrOnSymlink) { + const char name[] = "user.test"; + TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + TempPath link = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateSymlinkTo(dir.path(), test_file_name_)); + + EXPECT_THAT(lsetxattr(link.path().c_str(), name, nullptr, 0, 0), + SyscallFailsWithErrno(EPERM)); + EXPECT_THAT(lgetxattr(link.path().c_str(), name, nullptr, 0), + SyscallFailsWithErrno(ENODATA)); + EXPECT_THAT(llistxattr(link.path().c_str(), nullptr, 0), + SyscallSucceedsWithValue(0)); + EXPECT_THAT(lremovexattr(link.path().c_str(), name), + SyscallFailsWithErrno(EPERM)); +} + +TEST_F(XattrTest, LXattrOnNonsymlink) { + const char* path = test_file_name_.c_str(); + const char name[] = "user.test"; + int val = 1234; + size_t size = sizeof(val); + EXPECT_THAT(lsetxattr(path, name, &val, size, /*flags=*/0), + SyscallSucceeds()); + + int buf = 0; + EXPECT_THAT(lgetxattr(path, name, &buf, size), + SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, val); + + char list[sizeof(name)]; + EXPECT_THAT(llistxattr(path, list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); + + EXPECT_THAT(lremovexattr(path, name), SyscallSucceeds()); +} + +TEST_F(XattrTest, XattrWithFD) { + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(test_file_name_.c_str(), 0)); + const char name[] = "user.test"; + int val = 1234; + size_t size = sizeof(val); + EXPECT_THAT(fsetxattr(fd.get(), name, &val, size, /*flags=*/0), + SyscallSucceeds()); + + int buf = 0; + EXPECT_THAT(fgetxattr(fd.get(), name, &buf, size), + SyscallSucceedsWithValue(size)); + EXPECT_EQ(buf, val); + + char list[sizeof(name)]; + EXPECT_THAT(flistxattr(fd.get(), list, sizeof(list)), + SyscallSucceedsWithValue(sizeof(name))); + EXPECT_STREQ(list, name); + + EXPECT_THAT(fremovexattr(fd.get(), name), SyscallSucceeds()); +} + +} // namespace + +} // namespace testing +} // namespace gvisor |