diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/syscalls/BUILD | 4 | ||||
-rw-r--r-- | test/syscalls/linux/BUILD | 15 | ||||
-rw-r--r-- | test/syscalls/linux/deleted.cc | 116 | ||||
-rw-r--r-- | test/util/fs_util.cc | 8 | ||||
-rw-r--r-- | test/util/fs_util.h | 1 |
5 files changed, 144 insertions, 0 deletions
diff --git a/test/syscalls/BUILD b/test/syscalls/BUILD index f748d685a..7952fd969 100644 --- a/test/syscalls/BUILD +++ b/test/syscalls/BUILD @@ -1053,3 +1053,7 @@ syscall_test( syscall_test( test = "//test/syscalls/linux:verity_mount_test", ) + +syscall_test( + test = "//test/syscalls/linux:deleted_test", +) diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD index 6217ff4dc..020c4673a 100644 --- a/test/syscalls/linux/BUILD +++ b/test/syscalls/linux/BUILD @@ -4432,3 +4432,18 @@ cc_binary( "@com_google_absl//absl/container:flat_hash_set", ], ) + +cc_binary( + name = "deleted_test", + testonly = 1, + srcs = ["deleted.cc"], + linkstatic = 1, + deps = [ + "//test/util:file_descriptor", + "//test/util:fs_util", + gtest, + "//test/util:temp_path", + "//test/util:test_main", + "//test/util:test_util", + ], +) diff --git a/test/syscalls/linux/deleted.cc b/test/syscalls/linux/deleted.cc new file mode 100644 index 000000000..695ceafd3 --- /dev/null +++ b/test/syscalls/linux/deleted.cc @@ -0,0 +1,116 @@ +// 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 <errno.h> +#include <fcntl.h> +#include <time.h> +#include <unistd.h> + +#include <string> + +#include "gmock/gmock.h" +#include "gtest/gtest.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" + +constexpr mode_t mode = 1; + +namespace gvisor { +namespace testing { + +namespace { + +PosixErrorOr<FileDescriptor> createdDeleted() { + auto path = NewTempAbsPath(); + PosixErrorOr<FileDescriptor> fd = Open(path, O_RDWR | O_CREAT, mode); + if (!fd.ok()) { + return fd.error(); + } + + auto err = Unlink(path); + if (!err.ok()) { + return err; + } + return fd; +} + +TEST(DeletedTest, Utime) { + auto fd = ASSERT_NO_ERRNO_AND_VALUE(createdDeleted()); + + const struct timespec times[2] = {{10, 0}, {20, 0}}; + EXPECT_THAT(futimens(fd.get(), times), SyscallSucceeds()); + + struct stat stat; + ASSERT_THAT(fstat(fd.get(), &stat), SyscallSucceeds()); + EXPECT_EQ(10, stat.st_atime); + EXPECT_EQ(20, stat.st_mtime); +} + +TEST(DeletedTest, Chmod) { + auto fd = ASSERT_NO_ERRNO_AND_VALUE(createdDeleted()); + + ASSERT_THAT(fchmod(fd.get(), mode + 1), SyscallSucceeds()); + + struct stat stat; + ASSERT_THAT(fstat(fd.get(), &stat), SyscallSucceeds()); + EXPECT_EQ(mode + 1, stat.st_mode & ~S_IFMT); +} + +TEST(DeletedTest, Truncate) { + auto fd = ASSERT_NO_ERRNO_AND_VALUE(createdDeleted()); + const std::string data = "foobar"; + ASSERT_THAT(write(fd.get(), data.c_str(), data.size()), SyscallSucceeds()); + + ASSERT_THAT(ftruncate(fd.get(), 0), SyscallSucceeds()); + + struct stat stat; + ASSERT_THAT(fstat(fd.get(), &stat), SyscallSucceeds()); + ASSERT_EQ(stat.st_size, 0); +} + +TEST(DeletedTest, Fallocate) { + auto fd = ASSERT_NO_ERRNO_AND_VALUE(createdDeleted()); + + ASSERT_THAT(fallocate(fd.get(), 0, 0, 123), SyscallSucceeds()); + + struct stat stat; + ASSERT_THAT(fstat(fd.get(), &stat), SyscallSucceeds()); + EXPECT_EQ(123, stat.st_size); +} + +// Tests that a file can be created with the same path as a deleted file that +// still have an open FD to it. +TEST(DeletedTest, Replace) { + auto path = NewTempAbsPath(); + auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(path, O_RDWR | O_CREAT, mode)); + ASSERT_NO_ERRNO(Unlink(path)); + + auto other = + ASSERT_NO_ERRNO_AND_VALUE(Open(path, O_RDWR | O_CREAT | O_EXCL, mode)); + + auto stat = ASSERT_NO_ERRNO_AND_VALUE(Fstat(fd.get())); + auto stat_other = ASSERT_NO_ERRNO_AND_VALUE(Fstat(other.get())); + ASSERT_NE(stat.st_ino, stat_other.st_ino); + + // Check that the path points to the new file. + stat = ASSERT_NO_ERRNO_AND_VALUE(Stat(path)); + ASSERT_EQ(stat.st_ino, stat_other.st_ino); +} + +} // namespace + +} // namespace testing +} // namespace gvisor diff --git a/test/util/fs_util.cc b/test/util/fs_util.cc index 253411858..1c24d9ffc 100644 --- a/test/util/fs_util.cc +++ b/test/util/fs_util.cc @@ -188,6 +188,14 @@ PosixError MknodAt(const FileDescriptor& dfd, absl::string_view path, int mode, return NoError(); } +PosixError Unlink(absl::string_view path) { + int res = unlink(std::string(path).c_str()); + if (res < 0) { + return PosixError(errno, absl::StrCat("unlink ", path)); + } + return NoError(); +} + PosixError UnlinkAt(const FileDescriptor& dfd, absl::string_view path, int flags) { int res = unlinkat(dfd.get(), std::string(path).c_str(), flags); diff --git a/test/util/fs_util.h b/test/util/fs_util.h index bb2d1d3c8..3ae0a725a 100644 --- a/test/util/fs_util.h +++ b/test/util/fs_util.h @@ -71,6 +71,7 @@ PosixError MknodAt(const FileDescriptor& dfd, absl::string_view path, int mode, dev_t dev); // Unlink the file. +PosixError Unlink(absl::string_view path); PosixError UnlinkAt(const FileDescriptor& dfd, absl::string_view path, int flags); |