diff options
Diffstat (limited to 'test/syscalls/linux')
25 files changed, 1243 insertions, 102 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD index 3f12a04c0..6d051f48b 100644 --- a/test/syscalls/linux/BUILD +++ b/test/syscalls/linux/BUILD @@ -802,10 +802,13 @@ cc_binary( ], linkstatic = 1, deps = [ + ":socket_test_util", "//test/util:file_descriptor", "@com_google_absl//absl/strings", "@com_google_absl//absl/time", gtest, + "//test/util:epoll_util", + "//test/util:eventfd_util", "//test/util:posix_error", "//test/util:temp_path", "//test/util:test_main", @@ -948,6 +951,7 @@ cc_binary( "//test/util:epoll_util", "//test/util:file_descriptor", "//test/util:fs_util", + "//test/util:posix_error", "//test/util:temp_path", "//test/util:test_main", "//test/util:test_util", @@ -1379,7 +1383,7 @@ cc_binary( srcs = ["partial_bad_buffer.cc"], linkstatic = 1, deps = [ - "//test/syscalls/linux:socket_test_util", + ":socket_test_util", "//test/util:file_descriptor", "//test/util:fs_util", "@com_google_absl//absl/time", @@ -1408,6 +1412,21 @@ cc_binary( ) cc_binary( + name = "ping_socket_test", + testonly = 1, + srcs = ["ping_socket.cc"], + linkstatic = 1, + deps = [ + ":socket_test_util", + "//test/util:file_descriptor", + gtest, + "//test/util:save_util", + "//test/util:test_main", + "//test/util:test_util", + ], +) + +cc_binary( name = "pipe_test", testonly = 1, srcs = ["pipe.cc"], @@ -2777,6 +2796,26 @@ cc_binary( ) cc_binary( + name = "socket_inet_loopback_nogotsan_test", + testonly = 1, + srcs = ["socket_inet_loopback_nogotsan.cc"], + linkstatic = 1, + deps = [ + ":ip_socket_test_util", + ":socket_test_util", + "//test/util:file_descriptor", + "@com_google_absl//absl/memory", + "@com_google_absl//absl/strings", + gtest, + "//test/util:posix_error", + "//test/util:save_util", + "//test/util:test_main", + "//test/util:test_util", + "//test/util:thread_util", + ], +) + +cc_binary( name = "socket_netlink_test", testonly = 1, srcs = ["socket_netlink.cc"], @@ -3458,7 +3497,7 @@ cc_binary( deps = [ ":socket_test_util", gtest, - "//test/syscalls/linux:socket_netlink_route_util", + ":socket_netlink_route_util", "//test/util:capability_util", "//test/util:file_descriptor", "//test/util:fs_util", diff --git a/test/syscalls/linux/accept_bind.cc b/test/syscalls/linux/accept_bind.cc index e08c578f0..f65a14fb8 100644 --- a/test/syscalls/linux/accept_bind.cc +++ b/test/syscalls/linux/accept_bind.cc @@ -13,6 +13,7 @@ // limitations under the License. #include <stdio.h> +#include <sys/socket.h> #include <sys/un.h> #include <algorithm> @@ -141,6 +142,47 @@ TEST_P(AllSocketPairTest, Connect) { SyscallSucceeds()); } +TEST_P(AllSocketPairTest, ConnectWithWrongType) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + int type; + socklen_t typelen = sizeof(type); + EXPECT_THAT( + getsockopt(sockets->first_fd(), SOL_SOCKET, SO_TYPE, &type, &typelen), + SyscallSucceeds()); + switch (type) { + case SOCK_STREAM: + type = SOCK_SEQPACKET; + break; + case SOCK_SEQPACKET: + type = SOCK_STREAM; + break; + } + + const FileDescriptor another_socket = + ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, type, 0)); + + ASSERT_THAT(bind(sockets->first_fd(), sockets->first_addr(), + sockets->first_addr_size()), + SyscallSucceeds()); + + ASSERT_THAT(listen(sockets->first_fd(), 5), SyscallSucceeds()); + + if (sockets->first_addr()->sa_data[0] != 0) { + ASSERT_THAT(connect(another_socket.get(), sockets->first_addr(), + sockets->first_addr_size()), + SyscallFailsWithErrno(EPROTOTYPE)); + } else { + ASSERT_THAT(connect(another_socket.get(), sockets->first_addr(), + sockets->first_addr_size()), + SyscallFailsWithErrno(ECONNREFUSED)); + } + + ASSERT_THAT(connect(sockets->second_fd(), sockets->first_addr(), + sockets->first_addr_size()), + SyscallSucceeds()); +} + TEST_P(AllSocketPairTest, ConnectNonListening) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); diff --git a/test/syscalls/linux/exec.cc b/test/syscalls/linux/exec.cc index 12c9b05ca..e09afafe9 100644 --- a/test/syscalls/linux/exec.cc +++ b/test/syscalls/linux/exec.cc @@ -673,6 +673,33 @@ TEST(ExecveatTest, SymlinkNoFollowWithRelativePath) { EXPECT_EQ(execve_errno, ELOOP); } +TEST(ExecveatTest, UnshareFiles) { + TempPath tempFile = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), "bar", 0755)); + const FileDescriptor fd_closed_on_exec = + ASSERT_NO_ERRNO_AND_VALUE(Open(tempFile.path(), O_RDONLY | O_CLOEXEC)); + + pid_t child; + EXPECT_THAT(child = syscall(__NR_clone, SIGCHLD | CLONE_VFORK | CLONE_FILES, + 0, 0, 0, 0), + SyscallSucceeds()); + if (child == 0) { + ExecveArray argv = {"test"}; + ExecveArray envp; + ASSERT_THAT( + execve(RunfilePath(kBasicWorkload).c_str(), argv.get(), envp.get()), + SyscallSucceeds()); + _exit(1); + } + + int status; + ASSERT_THAT(RetryEINTR(waitpid)(child, &status, 0), SyscallSucceeds()); + EXPECT_EQ(status, 0); + + struct stat st; + EXPECT_THAT(fstat(fd_closed_on_exec.get(), &st), SyscallSucceeds()); +} + TEST(ExecveatTest, SymlinkNoFollowWithAbsolutePath) { std::string parent_dir = "/tmp"; TempPath link = ASSERT_NO_ERRNO_AND_VALUE( diff --git a/test/syscalls/linux/exec_binary.cc b/test/syscalls/linux/exec_binary.cc index 1a9f203b9..18d2f22c1 100644 --- a/test/syscalls/linux/exec_binary.cc +++ b/test/syscalls/linux/exec_binary.cc @@ -438,7 +438,12 @@ TEST(ElfTest, MissingText) { ASSERT_THAT(RetryEINTR(waitpid)(child, &status, 0), SyscallSucceedsWithValue(child)); // It runs off the end of the zeroes filling the end of the page. +#if defined(__x86_64__) EXPECT_TRUE(WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV) << status; +#elif defined(__aarch64__) + // 0 is an invalid instruction opcode on arm64. + EXPECT_TRUE(WIFSIGNALED(status) && WTERMSIG(status) == SIGILL) << status; +#endif } // Typical ELF with a data + bss segment diff --git a/test/syscalls/linux/flock.cc b/test/syscalls/linux/flock.cc index 3ecb8db8e..638a93979 100644 --- a/test/syscalls/linux/flock.cc +++ b/test/syscalls/linux/flock.cc @@ -21,6 +21,7 @@ #include "absl/time/clock.h" #include "absl/time/time.h" #include "test/syscalls/linux/file_base.h" +#include "test/syscalls/linux/socket_test_util.h" #include "test/util/file_descriptor.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" @@ -34,11 +35,6 @@ namespace { class FlockTest : public FileTest {}; -TEST_F(FlockTest, BadFD) { - // EBADF: fd is not an open file descriptor. - ASSERT_THAT(flock(-1, 0), SyscallFailsWithErrno(EBADF)); -} - TEST_F(FlockTest, InvalidOpCombinations) { // The operation cannot be both exclusive and shared. EXPECT_THAT(flock(test_file_fd_.get(), LOCK_EX | LOCK_SH | LOCK_NB), @@ -57,15 +53,6 @@ TEST_F(FlockTest, NoOperationSpecified) { SyscallFailsWithErrno(EINVAL)); } -TEST(FlockTestNoFixture, FlockSupportsPipes) { - int fds[2]; - ASSERT_THAT(pipe(fds), SyscallSucceeds()); - - EXPECT_THAT(flock(fds[0], LOCK_EX | LOCK_NB), SyscallSucceeds()); - EXPECT_THAT(close(fds[0]), SyscallSucceeds()); - EXPECT_THAT(close(fds[1]), SyscallSucceeds()); -} - TEST_F(FlockTest, TestSimpleExLock) { // Test that we can obtain an exclusive lock (no other holders) // and that we can unlock it. @@ -583,6 +570,66 @@ TEST_F(FlockTest, BlockingLockFirstExclusiveSecondExclusive_NoRandomSave) { EXPECT_THAT(flock(test_file_fd_.get(), LOCK_UN), SyscallSucceeds()); } +TEST(FlockTestNoFixture, BadFD) { + // EBADF: fd is not an open file descriptor. + ASSERT_THAT(flock(-1, 0), SyscallFailsWithErrno(EBADF)); +} + +TEST(FlockTestNoFixture, FlockDir) { + auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(dir.path(), O_RDONLY, 0000)); + EXPECT_THAT(flock(fd.get(), LOCK_EX | LOCK_NB), SyscallSucceeds()); +} + +TEST(FlockTestNoFixture, FlockSymlink) { + // TODO(gvisor.dev/issue/2782): Replace with IsRunningWithVFS1() when O_PATH + // is supported. + SKIP_IF(IsRunningOnGvisor()); + + auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + auto symlink = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateSymlinkTo(GetAbsoluteTestTmpdir(), file.path())); + + auto fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(symlink.path(), O_RDONLY | O_PATH, 0000)); + EXPECT_THAT(flock(fd.get(), LOCK_EX | LOCK_NB), SyscallFailsWithErrno(EBADF)); +} + +TEST(FlockTestNoFixture, FlockProc) { + auto fd = + ASSERT_NO_ERRNO_AND_VALUE(Open("/proc/self/status", O_RDONLY, 0000)); + EXPECT_THAT(flock(fd.get(), LOCK_EX | LOCK_NB), SyscallSucceeds()); +} + +TEST(FlockTestNoFixture, FlockPipe) { + int fds[2]; + ASSERT_THAT(pipe(fds), SyscallSucceeds()); + + EXPECT_THAT(flock(fds[0], LOCK_EX | LOCK_NB), SyscallSucceeds()); + // Check that the pipe was locked above. + EXPECT_THAT(flock(fds[1], LOCK_EX | LOCK_NB), SyscallFailsWithErrno(EAGAIN)); + + EXPECT_THAT(flock(fds[0], LOCK_UN), SyscallSucceeds()); + EXPECT_THAT(flock(fds[1], LOCK_EX | LOCK_NB), SyscallSucceeds()); + + EXPECT_THAT(close(fds[0]), SyscallSucceeds()); + EXPECT_THAT(close(fds[1]), SyscallSucceeds()); +} + +TEST(FlockTestNoFixture, FlockSocket) { + int sock = socket(AF_UNIX, SOCK_STREAM, 0); + ASSERT_THAT(sock, SyscallSucceeds()); + + struct sockaddr_un addr = + ASSERT_NO_ERRNO_AND_VALUE(UniqueUnixAddr(true /* abstract */, AF_UNIX)); + ASSERT_THAT( + bind(sock, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)), + SyscallSucceeds()); + + EXPECT_THAT(flock(sock, LOCK_EX | LOCK_NB), SyscallSucceeds()); + EXPECT_THAT(close(sock), SyscallSucceeds()); +} + } // namespace } // namespace testing diff --git a/test/syscalls/linux/inotify.cc b/test/syscalls/linux/inotify.cc index 0e13ad190..1d1a7171d 100644 --- a/test/syscalls/linux/inotify.cc +++ b/test/syscalls/linux/inotify.cc @@ -19,6 +19,7 @@ #include <sys/inotify.h> #include <sys/ioctl.h> #include <sys/time.h> +#include <sys/xattr.h> #include <atomic> #include <list> @@ -33,6 +34,7 @@ #include "test/util/epoll_util.h" #include "test/util/file_descriptor.h" #include "test/util/fs_util.h" +#include "test/util/posix_error.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" @@ -335,6 +337,11 @@ TEST(Inotify, InotifyFdNotWritable) { EXPECT_THAT(write(fd.get(), "x", 1), SyscallFailsWithErrno(EBADF)); } +TEST(Inotify, InitFlags) { + EXPECT_THAT(inotify_init1(IN_NONBLOCK | IN_CLOEXEC), SyscallSucceeds()); + EXPECT_THAT(inotify_init1(12345), SyscallFailsWithErrno(EINVAL)); +} + TEST(Inotify, NonBlockingReadReturnsEagain) { const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); @@ -395,7 +402,7 @@ TEST(Inotify, CanDeleteFileAfterRemovingWatch) { file1.reset(); } -TEST(Inotify, CanRemoveWatchAfterDeletingFile) { +TEST(Inotify, RemoveWatchAfterDeletingFileFails) { const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); TempPath file1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path())); @@ -491,17 +498,23 @@ TEST(Inotify, DeletingChildGeneratesEvents) { Event(IN_DELETE, root_wd, Basename(file1_path))})); } +// Creating a file in "parent/child" should generate events for child, but not +// parent. TEST(Inotify, CreatingFileGeneratesEvents) { - const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath parent = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath child = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent.path())); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(fd.get(), parent.path(), IN_ALL_EVENTS)); const int wd = ASSERT_NO_ERRNO_AND_VALUE( - InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS)); + InotifyAddWatch(fd.get(), child.path(), IN_ALL_EVENTS)); // Create a new file in the directory. const TempPath file1 = - ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path())); + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(child.path())); const std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get())); @@ -554,6 +567,47 @@ TEST(Inotify, WritingFileGeneratesModifyEvent) { ASSERT_THAT(events, Are({Event(IN_MODIFY, wd, Basename(file1.path()))})); } +TEST(Inotify, SizeZeroReadWriteGeneratesNothing) { + const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const TempPath file1 = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(root.path())); + + const FileDescriptor file1_fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file1.path(), O_RDWR)); + ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS)); + + // Read from the empty file. + int val; + ASSERT_THAT(read(file1_fd.get(), &val, sizeof(val)), + SyscallSucceedsWithValue(0)); + + // Write zero bytes. + ASSERT_THAT(write(file1_fd.get(), "", 0), SyscallSucceedsWithValue(0)); + + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get())); + ASSERT_THAT(events, Are({})); +} + +TEST(Inotify, FailedFileCreationGeneratesNoEvents) { + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const std::string dir_path = dir.path(); + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + ASSERT_NO_ERRNO_AND_VALUE(InotifyAddWatch(fd.get(), dir_path, IN_ALL_EVENTS)); + + const char* p = dir_path.c_str(); + ASSERT_THAT(mkdir(p, 0777), SyscallFails()); + ASSERT_THAT(mknod(p, S_IFIFO, 0777), SyscallFails()); + ASSERT_THAT(symlink(p, p), SyscallFails()); + ASSERT_THAT(link(p, p), SyscallFails()); + std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get())); + ASSERT_THAT(events, Are({})); +} + TEST(Inotify, WatchSetAfterOpenReportsCloseFdEvent) { const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); const FileDescriptor fd = @@ -602,7 +656,7 @@ TEST(Inotify, ChildrenDeletionInWatchedDirGeneratesEvent) { Event(IN_DELETE | IN_ISDIR, wd, Basename(dir1_path))})); } -TEST(Inotify, WatchTargetDeletionGeneratesEvent) { +TEST(Inotify, RmdirOnWatchedTargetGeneratesEvent) { const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); @@ -1228,7 +1282,7 @@ TEST(Inotify, LinkGeneratesAttribAndCreateEvents) { InotifyAddWatch(fd.get(), file1.path(), IN_ALL_EVENTS)); const int rc = link(file1.path().c_str(), link1.path().c_str()); - // link(2) is only supported on tmpfs in the sandbox. + // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox. SKIP_IF(IsRunningOnGvisor() && rc != 0 && (errno == EPERM || errno == ENOENT)); ASSERT_THAT(rc, SyscallSucceeds()); @@ -1322,21 +1376,27 @@ TEST(Inotify, HardlinksReuseSameWatch) { Event(IN_DELETE, root_wd, Basename(file1_path))})); } +// Calling mkdir within "parent/child" should generate an event for child, but +// not parent. TEST(Inotify, MkdirGeneratesCreateEventWithDirFlag) { - const TempPath root = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath parent = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath child = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent.path())); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); - const int root_wd = ASSERT_NO_ERRNO_AND_VALUE( - InotifyAddWatch(fd.get(), root.path(), IN_ALL_EVENTS)); + ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(fd.get(), parent.path(), IN_ALL_EVENTS)); + const int child_wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(fd.get(), child.path(), IN_ALL_EVENTS)); - const TempPath dir1(NewTempAbsPathInDir(root.path())); + const TempPath dir1(NewTempAbsPathInDir(child.path())); ASSERT_THAT(mkdir(dir1.path().c_str(), 0777), SyscallSucceeds()); const std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get())); ASSERT_THAT( events, - Are({Event(IN_CREATE | IN_ISDIR, root_wd, Basename(dir1.path()))})); + Are({Event(IN_CREATE | IN_ISDIR, child_wd, Basename(dir1.path()))})); } TEST(Inotify, MultipleInotifyInstancesAndWatchesAllGetEvents) { @@ -1596,7 +1656,44 @@ TEST(Inotify, EpollNoDeadlock) { } } -TEST(Inotify, SpliceEvent) { +// On Linux, inotify behavior is not very consistent with splice(2). We try our +// best to emulate Linux for very basic calls to splice. +TEST(Inotify, SpliceOnWatchTarget) { + int pipes[2]; + ASSERT_THAT(pipe2(pipes, O_NONBLOCK), SyscallSucceeds()); + + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( + dir.path(), "some content", TempPath::kDefaultFileMode)); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR)); + const int dir_wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), dir.path(), IN_ALL_EVENTS)); + const int file_wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), file.path(), IN_ALL_EVENTS)); + + EXPECT_THAT(splice(fd.get(), nullptr, pipes[1], nullptr, 1, /*flags=*/0), + SyscallSucceedsWithValue(1)); + + // Surprisingly, events are not generated in Linux if we read from a file. + std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + ASSERT_THAT(events, Are({})); + + EXPECT_THAT(splice(pipes[0], nullptr, fd.get(), nullptr, 1, /*flags=*/0), + SyscallSucceedsWithValue(1)); + + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + ASSERT_THAT(events, Are({ + Event(IN_MODIFY, dir_wd, Basename(file.path())), + Event(IN_MODIFY, file_wd), + })); +} + +TEST(Inotify, SpliceOnInotifyFD) { int pipes[2]; ASSERT_THAT(pipe2(pipes, O_NONBLOCK), SyscallSucceeds()); @@ -1624,6 +1721,315 @@ TEST(Inotify, SpliceEvent) { ASSERT_THAT(events, Are({Event(IN_ACCESS, watcher)})); } +// Watches on a parent should not be triggered by actions on a hard link to one +// of its children that has a different parent. +TEST(Inotify, LinkOnOtherParent) { + const TempPath dir1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath dir2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath file = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir1.path())); + std::string link_path = NewTempAbsPathInDir(dir2.path()); + + const int rc = link(file.path().c_str(), link_path.c_str()); + // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox. + SKIP_IF(IsRunningOnGvisor() && rc != 0 && + (errno == EPERM || errno == ENOENT)); + ASSERT_THAT(rc, SyscallSucceeds()); + + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), dir1.path(), IN_ALL_EVENTS)); + + // Perform various actions on the link outside of dir1, which should trigger + // no inotify events. + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(link_path.c_str(), O_RDWR)); + int val = 0; + ASSERT_THAT(write(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + ASSERT_THAT(read(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + ASSERT_THAT(ftruncate(fd.get(), 12345), SyscallSucceeds()); + ASSERT_THAT(unlink(link_path.c_str()), SyscallSucceeds()); + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({})); +} + +TEST(Inotify, Xattr) { + // TODO(gvisor.dev/issue/1636): Support extended attributes in runsc gofer. + SKIP_IF(IsRunningOnGvisor()); + + const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + const std::string path = file.path(); + const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(path, O_RDWR)); + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), path, IN_ALL_EVENTS)); + + const char* cpath = path.c_str(); + const char* name = "user.test"; + int val = 123; + ASSERT_THAT(setxattr(cpath, name, &val, sizeof(val), /*flags=*/0), + SyscallSucceeds()); + std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd)})); + + ASSERT_THAT(getxattr(cpath, name, &val, sizeof(val)), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({})); + + char list[100]; + ASSERT_THAT(listxattr(cpath, list, sizeof(list)), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({})); + + ASSERT_THAT(removexattr(cpath, name), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd)})); + + ASSERT_THAT(fsetxattr(fd.get(), name, &val, sizeof(val), /*flags=*/0), + SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd)})); + + ASSERT_THAT(fgetxattr(fd.get(), name, &val, sizeof(val)), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({})); + + ASSERT_THAT(flistxattr(fd.get(), list, sizeof(list)), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({})); + + ASSERT_THAT(fremovexattr(fd.get(), name), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd)})); +} + +TEST(Inotify, Exec) { + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath bin = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateSymlinkTo(dir.path(), "/bin/true")); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(fd.get(), bin.path(), IN_ALL_EVENTS)); + + // Perform exec. + ScopedThread t([&bin]() { + ASSERT_THAT(execl(bin.path().c_str(), bin.path().c_str(), (char*)nullptr), + SyscallSucceeds()); + }); + t.Join(); + + std::vector<Event> events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(fd.get())); + EXPECT_THAT(events, Are({Event(IN_OPEN, wd), Event(IN_ACCESS, wd)})); +} + +// Watches without IN_EXCL_UNLINK, should continue to emit events for file +// descriptors after their corresponding files have been unlinked. +// +// We need to disable S/R because there are filesystems where we cannot re-open +// fds to an unlinked file across S/R, e.g. gofer-backed filesytems. +TEST(Inotify, IncludeUnlinkedFile_NoRandomSave) { + const DisableSave ds; + + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath file = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateFileWith(dir.path(), "123", TempPath::kDefaultFileMode)); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR)); + + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int dir_wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), dir.path(), IN_ALL_EVENTS)); + const int file_wd = ASSERT_NO_ERRNO_AND_VALUE( + InotifyAddWatch(inotify_fd.get(), file.path(), IN_ALL_EVENTS)); + + ASSERT_THAT(unlink(file.path().c_str()), SyscallSucceeds()); + int val = 0; + ASSERT_THAT(read(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + ASSERT_THAT(write(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({ + Event(IN_ATTRIB, file_wd), + Event(IN_DELETE, dir_wd, Basename(file.path())), + Event(IN_ACCESS, dir_wd, Basename(file.path())), + Event(IN_ACCESS, file_wd), + Event(IN_MODIFY, dir_wd, Basename(file.path())), + Event(IN_MODIFY, file_wd), + })); +} + +// Watches created with IN_EXCL_UNLINK will stop emitting events on fds for +// children that have already been unlinked. +// +// We need to disable S/R because there are filesystems where we cannot re-open +// fds to an unlinked file across S/R, e.g. gofer-backed filesytems. +TEST(Inotify, ExcludeUnlink_NoRandomSave) { + const DisableSave ds; + // TODO(gvisor.dev/issue/1624): This test fails on VFS1. + SKIP_IF(IsRunningWithVFS1()); + + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath file = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path())); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR)); + + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE(InotifyAddWatch( + inotify_fd.get(), dir.path(), IN_ALL_EVENTS | IN_EXCL_UNLINK)); + + // Unlink the child, which should cause further operations on the open file + // descriptor to be ignored. + ASSERT_THAT(unlink(file.path().c_str()), SyscallSucceeds()); + int val = 0; + ASSERT_THAT(write(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + ASSERT_THAT(read(fd.get(), &val, sizeof(val)), SyscallSucceeds()); + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_DELETE, wd, Basename(file.path()))})); +} + +// We need to disable S/R because there are filesystems where we cannot re-open +// fds to an unlinked file across S/R, e.g. gofer-backed filesytems. +TEST(Inotify, ExcludeUnlinkDirectory_NoRandomSave) { + const DisableSave ds; + + const TempPath parent = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + TempPath dir = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDirIn(parent.path())); + std::string dirPath = dir.path(); + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(dirPath.c_str(), O_RDONLY | O_DIRECTORY)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE(InotifyAddWatch( + inotify_fd.get(), parent.path(), IN_ALL_EVENTS | IN_EXCL_UNLINK)); + + // Unlink the dir, and then close the open fd. + ASSERT_THAT(rmdir(dirPath.c_str()), SyscallSucceeds()); + dir.reset(); + + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + // No close event should appear. + ASSERT_THAT(events, + Are({Event(IN_DELETE | IN_ISDIR, wd, Basename(dirPath))})); +} + +// If "dir/child" and "dir/child2" are links to the same file, and "dir/child" +// is unlinked, a watch on "dir" with IN_EXCL_UNLINK will exclude future events +// for fds on "dir/child" but not "dir/child2". +// +// We need to disable S/R because there are filesystems where we cannot re-open +// fds to an unlinked file across S/R, e.g. gofer-backed filesytems. +TEST(Inotify, ExcludeUnlinkMultipleChildren_NoRandomSave) { + const DisableSave ds; + // TODO(gvisor.dev/issue/1624): This test fails on VFS1. + SKIP_IF(IsRunningWithVFS1()); + + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath file = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path())); + std::string path1 = file.path(); + std::string path2 = NewTempAbsPathInDir(dir.path()); + + const int rc = link(path1.c_str(), path2.c_str()); + // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox. + SKIP_IF(IsRunningOnGvisor() && rc != 0 && + (errno == EPERM || errno == ENOENT)); + ASSERT_THAT(rc, SyscallSucceeds()); + const FileDescriptor fd1 = + ASSERT_NO_ERRNO_AND_VALUE(Open(path1.c_str(), O_RDWR)); + const FileDescriptor fd2 = + ASSERT_NO_ERRNO_AND_VALUE(Open(path2.c_str(), O_RDWR)); + + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE(InotifyAddWatch( + inotify_fd.get(), dir.path(), IN_ALL_EVENTS | IN_EXCL_UNLINK)); + + // After unlinking path1, only events on the fd for path2 should be generated. + ASSERT_THAT(unlink(path1.c_str()), SyscallSucceeds()); + ASSERT_THAT(write(fd1.get(), "x", 1), SyscallSucceeds()); + ASSERT_THAT(write(fd2.get(), "x", 1), SyscallSucceeds()); + + const std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({ + Event(IN_DELETE, wd, Basename(path1)), + Event(IN_MODIFY, wd, Basename(path2)), + })); +} + +// On native Linux, actions of data type FSNOTIFY_EVENT_INODE are not affected +// by IN_EXCL_UNLINK (see +// fs/notify/inotify/inotify_fsnotify.c:inotify_handle_event). Inode-level +// events include changes to metadata and extended attributes. +// +// We need to disable S/R because there are filesystems where we cannot re-open +// fds to an unlinked file across S/R, e.g. gofer-backed filesytems. +TEST(Inotify, ExcludeUnlinkInodeEvents_NoRandomSave) { + const DisableSave ds; + + const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + const TempPath file = + ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path())); + + const FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(file.path().c_str(), O_RDWR)); + const FileDescriptor inotify_fd = + ASSERT_NO_ERRNO_AND_VALUE(InotifyInit1(IN_NONBLOCK)); + const int wd = ASSERT_NO_ERRNO_AND_VALUE(InotifyAddWatch( + inotify_fd.get(), dir.path(), IN_ALL_EVENTS | IN_EXCL_UNLINK)); + + // NOTE(b/157163751): Create another link before unlinking. This is needed for + // the gofer filesystem in gVisor, where open fds will not work once the link + // count hits zero. In VFS2, we end up skipping the gofer test anyway, because + // hard links are not supported for gofer fs. + if (IsRunningOnGvisor()) { + std::string link_path = NewTempAbsPath(); + const int rc = link(file.path().c_str(), link_path.c_str()); + // NOTE(b/34861058): link(2) is only supported on tmpfs in the sandbox. + SKIP_IF(rc != 0 && (errno == EPERM || errno == ENOENT)); + ASSERT_THAT(rc, SyscallSucceeds()); + } + + // Even after unlinking, inode-level operations will trigger events regardless + // of IN_EXCL_UNLINK. + ASSERT_THAT(unlink(file.path().c_str()), SyscallSucceeds()); + + // Perform various actions on fd. + ASSERT_THAT(ftruncate(fd.get(), 12345), SyscallSucceeds()); + std::vector<Event> events = + ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({ + Event(IN_DELETE, wd, Basename(file.path())), + Event(IN_MODIFY, wd, Basename(file.path())), + })); + + struct timeval times[2] = {{1, 0}, {2, 0}}; + ASSERT_THAT(futimes(fd.get(), times), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd, Basename(file.path()))})); + + // S/R is disabled on this entire test due to behavior with unlink; it must + // also be disabled after this point because of fchmod. + ASSERT_THAT(fchmod(fd.get(), 0777), SyscallSucceeds()); + events = ASSERT_NO_ERRNO_AND_VALUE(DrainEvents(inotify_fd.get())); + EXPECT_THAT(events, Are({Event(IN_ATTRIB, wd, Basename(file.path()))})); +} + } // namespace } // namespace testing } // namespace gvisor diff --git a/test/syscalls/linux/itimer.cc b/test/syscalls/linux/itimer.cc index dd981a278..e397d5f57 100644 --- a/test/syscalls/linux/itimer.cc +++ b/test/syscalls/linux/itimer.cc @@ -267,8 +267,19 @@ int TestSIGPROFFairness(absl::Duration sleep) { // Random save/restore is disabled as it introduces additional latency and // unpredictable distribution patterns. TEST(ItimerTest, DeliversSIGPROFToThreadsRoughlyFairlyActive_NoRandomSave) { - // TODO(b/143247272): CPU time accounting is inaccurate for the KVM platform. - SKIP_IF(GvisorPlatform() == Platform::kKVM); + // On the KVM and ptrace platforms, switches between sentry and application + // context are sometimes extremely slow, causing the itimer to send SIGPROF to + // a thread that either already has one pending or has had SIGPROF delivered, + // but hasn't handled it yet (and thus therefore still has SIGPROF masked). In + // either case, since itimer signals are group-directed, signal sending falls + // back to notifying the thread group leader. ItimerSignalTest() fails if "too + // many" signals are delivered to the thread group leader, so these tests are + // flaky on these platforms. + // + // TODO(b/143247272): Clarify why context switches are so slow on KVM. + const auto gvisor_platform = GvisorPlatform(); + SKIP_IF(gvisor_platform == Platform::kKVM || + gvisor_platform == Platform::kPtrace); pid_t child; int execve_errno; @@ -291,8 +302,10 @@ TEST(ItimerTest, DeliversSIGPROFToThreadsRoughlyFairlyActive_NoRandomSave) { // Random save/restore is disabled as it introduces additional latency and // unpredictable distribution patterns. TEST(ItimerTest, DeliversSIGPROFToThreadsRoughlyFairlyIdle_NoRandomSave) { - // TODO(b/143247272): CPU time accounting is inaccurate for the KVM platform. - SKIP_IF(GvisorPlatform() == Platform::kKVM); + // See comment in DeliversSIGPROFToThreadsRoughlyFairlyActive. + const auto gvisor_platform = GvisorPlatform(); + SKIP_IF(gvisor_platform == Platform::kKVM || + gvisor_platform == Platform::kPtrace); pid_t child; int execve_errno; diff --git a/test/syscalls/linux/open.cc b/test/syscalls/linux/open.cc index 640fe6bfc..670c0284b 100644 --- a/test/syscalls/linux/open.cc +++ b/test/syscalls/linux/open.cc @@ -416,6 +416,29 @@ TEST_F(OpenTest, CanTruncateWriteOnlyNoReadPermission_NoRandomSave) { EXPECT_EQ(stat.st_size, 0); } +TEST_F(OpenTest, CanTruncateWithStrangePermissions) { + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false)); + ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false)); + const DisableSave ds; // Permissions are dropped. + std::string path = NewTempAbsPath(); + int fd; + // Create a file without user permissions. + EXPECT_THAT( // SAVE_BELOW + fd = open(path.c_str(), O_CREAT | O_TRUNC | O_WRONLY, 055), + SyscallSucceeds()); + EXPECT_THAT(close(fd), SyscallSucceeds()); + + // Cannot open file because we are owner and have no permissions set. + EXPECT_THAT(open(path.c_str(), O_RDONLY), SyscallFailsWithErrno(EACCES)); + + // We *can* chmod the file, because we are the owner. + EXPECT_THAT(chmod(path.c_str(), 0755), SyscallSucceeds()); + + // Now we can open the file again. + EXPECT_THAT(fd = open(path.c_str(), O_RDWR), SyscallSucceeds()); + EXPECT_THAT(close(fd), SyscallSucceeds()); +} + } // namespace } // namespace testing diff --git a/test/syscalls/linux/ping_socket.cc b/test/syscalls/linux/ping_socket.cc new file mode 100644 index 000000000..a9bfdb37b --- /dev/null +++ b/test/syscalls/linux/ping_socket.cc @@ -0,0 +1,91 @@ +// Copyright 2020 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 <netinet/in.h> +#include <netinet/ip.h> +#include <netinet/ip_icmp.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <unistd.h> + +#include <vector> + +#include "gtest/gtest.h" +#include "test/syscalls/linux/socket_test_util.h" +#include "test/util/file_descriptor.h" +#include "test/util/save_util.h" +#include "test/util/test_util.h" + +namespace gvisor { +namespace testing { +namespace { + +class PingSocket : public ::testing::Test { + protected: + // Creates a socket to be used in tests. + void SetUp() override; + + // Closes the socket created by SetUp(). + void TearDown() override; + + // The loopback address. + struct sockaddr_in addr_; +}; + +void PingSocket::SetUp() { + // On some hosts ping sockets are restricted to specific groups using the + // sysctl "ping_group_range". + int s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); + if (s < 0 && errno == EPERM) { + GTEST_SKIP(); + } + close(s); + + addr_ = {}; + // Just a random port as the destination port number is irrelevant for ping + // sockets. + addr_.sin_port = 12345; + addr_.sin_addr.s_addr = htonl(INADDR_LOOPBACK); + addr_.sin_family = AF_INET; +} + +void PingSocket::TearDown() {} + +// Test ICMP port exhaustion returns EAGAIN. +// +// We disable both random/cooperative S/R for this test as it makes way too many +// syscalls. +TEST_F(PingSocket, ICMPPortExhaustion_NoRandomSave) { + DisableSave ds; + std::vector<FileDescriptor> sockets; + constexpr int kSockets = 65536; + addr_.sin_port = 0; + for (int i = 0; i < kSockets; i++) { + auto s = + ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP)); + int ret = connect(s.get(), reinterpret_cast<struct sockaddr*>(&addr_), + sizeof(addr_)); + if (ret == 0) { + sockets.push_back(std::move(s)); + continue; + } + ASSERT_THAT(ret, SyscallFailsWithErrno(EAGAIN)); + break; + } +} + +} // namespace + +} // namespace testing +} // namespace gvisor diff --git a/test/syscalls/linux/poll.cc b/test/syscalls/linux/poll.cc index 1e35a4a8b..7a316427d 100644 --- a/test/syscalls/linux/poll.cc +++ b/test/syscalls/linux/poll.cc @@ -259,9 +259,9 @@ TEST_F(PollTest, Nfds) { TEST_PCHECK(getrlimit(RLIMIT_NOFILE, &rlim) == 0); // gVisor caps the number of FDs that epoll can use beyond RLIMIT_NOFILE. - constexpr rlim_t gVisorMax = 1048576; - if (rlim.rlim_cur > gVisorMax) { - rlim.rlim_cur = gVisorMax; + constexpr rlim_t maxFD = 4096; + if (rlim.rlim_cur > maxFD) { + rlim.rlim_cur = maxFD; TEST_PCHECK(setrlimit(RLIMIT_NOFILE, &rlim) == 0); } diff --git a/test/syscalls/linux/pty.cc b/test/syscalls/linux/pty.cc index b8a0159ba..aabfa6955 100644 --- a/test/syscalls/linux/pty.cc +++ b/test/syscalls/linux/pty.cc @@ -364,6 +364,12 @@ PosixErrorOr<size_t> PollAndReadFd(int fd, void* buf, size_t count, ssize_t n = ReadFd(fd, static_cast<char*>(buf) + completed, count - completed); if (n < 0) { + if (errno == EAGAIN) { + // Linux sometimes returns EAGAIN from this read, despite the fact that + // poll returned success. Let's just do what do as we are told and try + // again. + continue; + } return PosixError(errno, "read failed"); } completed += n; diff --git a/test/syscalls/linux/socket.cc b/test/syscalls/linux/socket.cc index afa59c1da..e0a4d0985 100644 --- a/test/syscalls/linux/socket.cc +++ b/test/syscalls/linux/socket.cc @@ -62,9 +62,7 @@ TEST(SocketTest, ProtocolInet) { } TEST(SocketTest, UnixSocketStat) { - // TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It - // should pass in VFS2. - SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(IsRunningWithVFS1()); FileDescriptor bound = ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX)); @@ -94,9 +92,7 @@ TEST(SocketTest, UnixSocketStat) { } TEST(SocketTest, UnixConnectNeedsWritePerm) { - // TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It - // should succeed in VFS2. - SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(IsRunningWithVFS1()); FileDescriptor bound = ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX)); @@ -128,10 +124,7 @@ using SocketOpenTest = ::testing::TestWithParam<int>; // UDS cannot be opened. TEST_P(SocketOpenTest, Unix) { // FIXME(b/142001530): Open incorrectly succeeds on gVisor. - // - // TODO(gvisor.dev/issue/1624): Re-enable this test once VFS1 is deleted. It - // should succeed in VFS2. - SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(IsRunningWithVFS1()); FileDescriptor bound = ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_STREAM, PF_UNIX)); diff --git a/test/syscalls/linux/socket_bind_to_device_sequence.cc b/test/syscalls/linux/socket_bind_to_device_sequence.cc index 1967329ee..4b2cb0606 100644 --- a/test/syscalls/linux/socket_bind_to_device_sequence.cc +++ b/test/syscalls/linux/socket_bind_to_device_sequence.cc @@ -363,8 +363,9 @@ TEST_P(BindToDeviceSequenceTest, BindTwiceWithReuseOnce) { } TEST_P(BindToDeviceSequenceTest, BindWithReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); + // FIXME(b/158253835): Support SO_REUSEADDR on TCP sockets. + SKIP_IF(IsRunningOnGvisor() && + (GetParam().type & SOCK_STREAM) == SOCK_STREAM); ASSERT_NO_FATAL_FAILURE( BindSocket(/* reusePort */ false, /* reuse_addr */ true)); @@ -405,8 +406,9 @@ TEST_P(BindToDeviceSequenceTest, BindReuseAddrReusePortThenReusePort) { } TEST_P(BindToDeviceSequenceTest, BindReuseAddrReusePortThenReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); + // FIXME(b/158253835): Support SO_REUSEADDR on TCP sockets. + SKIP_IF(IsRunningOnGvisor() && + (GetParam().type & SOCK_STREAM) == SOCK_STREAM); ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true, /* reuse_addr */ true, @@ -434,8 +436,9 @@ TEST_P(BindToDeviceSequenceTest, BindDoubleReuseAddrReusePortThenReusePort) { } TEST_P(BindToDeviceSequenceTest, BindDoubleReuseAddrReusePortThenReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); + // FIXME(b/158253835): Support SO_REUSEADDR on TCP sockets. + SKIP_IF(IsRunningOnGvisor() && + (GetParam().type & SOCK_STREAM) == SOCK_STREAM); ASSERT_NO_FATAL_FAILURE(BindSocket( /* reuse_port */ true, /* reuse_addr */ true, /* bind_to_device */ 0)); @@ -469,10 +472,20 @@ TEST_P(BindToDeviceSequenceTest, BindReuseAddrThenReuseAddr) { /* bind_to_device */ 0, EADDRINUSE)); } -// This behavior seems like a bug? TEST_P(BindToDeviceSequenceTest, BindReuseAddrThenReuseAddrReusePortThenReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. + // The behavior described in this test seems like a Linux bug. It doesn't + // make any sense and it is unlikely that any applications rely on it. + // + // Both SO_REUSEADDR and SO_REUSEPORT allow binding multiple UDP sockets to + // the same address and deliver each packet to exactly one of the bound + // sockets. If both are enabled, one of the strategies is selected to route + // packets. The strategy is selected dynamically based on the settings of the + // currently bound sockets. Usually, the strategy is selected based on the + // common setting (SO_REUSEADDR or SO_REUSEPORT) amongst the sockets, but for + // some reason, Linux allows binding sets of sockets with no overlapping + // settings in some situations. In this case, it is not obvious which strategy + // would be selected as the configured setting is a contradiction. SKIP_IF(IsRunningOnGvisor()); ASSERT_NO_FATAL_FAILURE(BindSocket( diff --git a/test/syscalls/linux/socket_inet_loopback.cc b/test/syscalls/linux/socket_inet_loopback.cc index fa890ec98..a914d9a12 100644 --- a/test/syscalls/linux/socket_inet_loopback.cc +++ b/test/syscalls/linux/socket_inet_loopback.cc @@ -1900,9 +1900,6 @@ TEST_P(SocketMultiProtocolInetLoopbackTest, V6EphemeralPortReserved) { TEST_P(SocketMultiProtocolInetLoopbackTest, V6EphemeralPortReservedReuseAddr) { auto const& param = GetParam(); - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor() && param.type == SOCK_DGRAM); - // Bind the v6 loopback on a dual stack socket. TestAddress const& test_addr = V6Loopback(); sockaddr_storage bound_addr = test_addr.addr; @@ -2091,9 +2088,6 @@ TEST_P(SocketMultiProtocolInetLoopbackTest, V4MappedEphemeralPortReservedResueAddr) { auto const& param = GetParam(); - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor() && param.type == SOCK_DGRAM); - // Bind the v4 loopback on a dual stack socket. TestAddress const& test_addr = V4MappedLoopback(); sockaddr_storage bound_addr = test_addr.addr; @@ -2283,9 +2277,6 @@ TEST_P(SocketMultiProtocolInetLoopbackTest, V4EphemeralPortReserved) { TEST_P(SocketMultiProtocolInetLoopbackTest, V4EphemeralPortReservedReuseAddr) { auto const& param = GetParam(); - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor() && param.type == SOCK_DGRAM); - // Bind the v4 loopback on a v4 socket. TestAddress const& test_addr = V4Loopback(); sockaddr_storage bound_addr = test_addr.addr; diff --git a/test/syscalls/linux/socket_inet_loopback_nogotsan.cc b/test/syscalls/linux/socket_inet_loopback_nogotsan.cc new file mode 100644 index 000000000..2324c7f6a --- /dev/null +++ b/test/syscalls/linux/socket_inet_loopback_nogotsan.cc @@ -0,0 +1,171 @@ +// 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 <arpa/inet.h> +#include <netinet/in.h> +#include <netinet/tcp.h> +#include <string.h> + +#include <iostream> +#include <memory> +#include <string> +#include <utility> +#include <vector> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "absl/strings/str_cat.h" +#include "test/syscalls/linux/ip_socket_test_util.h" +#include "test/syscalls/linux/socket_test_util.h" +#include "test/util/file_descriptor.h" +#include "test/util/posix_error.h" +#include "test/util/save_util.h" +#include "test/util/test_util.h" + +namespace gvisor { +namespace testing { + +namespace { + +using ::testing::Gt; + +PosixErrorOr<uint16_t> AddrPort(int family, sockaddr_storage const& addr) { + switch (family) { + case AF_INET: + return static_cast<uint16_t>( + reinterpret_cast<sockaddr_in const*>(&addr)->sin_port); + case AF_INET6: + return static_cast<uint16_t>( + reinterpret_cast<sockaddr_in6 const*>(&addr)->sin6_port); + default: + return PosixError(EINVAL, + absl::StrCat("unknown socket family: ", family)); + } +} + +PosixError SetAddrPort(int family, sockaddr_storage* addr, uint16_t port) { + switch (family) { + case AF_INET: + reinterpret_cast<sockaddr_in*>(addr)->sin_port = port; + return NoError(); + case AF_INET6: + reinterpret_cast<sockaddr_in6*>(addr)->sin6_port = port; + return NoError(); + default: + return PosixError(EINVAL, + absl::StrCat("unknown socket family: ", family)); + } +} + +struct TestParam { + TestAddress listener; + TestAddress connector; +}; + +std::string DescribeTestParam(::testing::TestParamInfo<TestParam> const& info) { + return absl::StrCat("Listen", info.param.listener.description, "_Connect", + info.param.connector.description); +} + +using SocketInetLoopbackTest = ::testing::TestWithParam<TestParam>; + +// This test verifies that connect returns EADDRNOTAVAIL if all local ephemeral +// ports are already in use for a given destination ip/port. +// We disable S/R because this test creates a large number of sockets. +TEST_P(SocketInetLoopbackTest, TestTCPPortExhaustion_NoRandomSave) { + auto const& param = GetParam(); + TestAddress const& listener = param.listener; + TestAddress const& connector = param.connector; + + constexpr int kBacklog = 10; + constexpr int kClients = 65536; + + // Create the listening socket. + auto listen_fd = ASSERT_NO_ERRNO_AND_VALUE( + Socket(listener.family(), SOCK_STREAM, IPPROTO_TCP)); + sockaddr_storage listen_addr = listener.addr; + ASSERT_THAT(bind(listen_fd.get(), reinterpret_cast<sockaddr*>(&listen_addr), + listener.addr_len), + SyscallSucceeds()); + ASSERT_THAT(listen(listen_fd.get(), kBacklog), SyscallSucceeds()); + + // Get the port bound by the listening socket. + socklen_t addrlen = listener.addr_len; + ASSERT_THAT(getsockname(listen_fd.get(), + reinterpret_cast<sockaddr*>(&listen_addr), &addrlen), + SyscallSucceeds()); + uint16_t const port = + ASSERT_NO_ERRNO_AND_VALUE(AddrPort(listener.family(), listen_addr)); + + // Disable cooperative S/R as we are making too many syscalls. + DisableSave ds; + + // Now we keep opening connections till we run out of local ephemeral ports. + // and assert the error we get back. + sockaddr_storage conn_addr = connector.addr; + ASSERT_NO_ERRNO(SetAddrPort(connector.family(), &conn_addr, port)); + std::vector<FileDescriptor> clients; + std::vector<FileDescriptor> servers; + + for (int i = 0; i < kClients; i++) { + FileDescriptor client = ASSERT_NO_ERRNO_AND_VALUE( + Socket(connector.family(), SOCK_STREAM, IPPROTO_TCP)); + int ret = connect(client.get(), reinterpret_cast<sockaddr*>(&conn_addr), + connector.addr_len); + if (ret == 0) { + clients.push_back(std::move(client)); + FileDescriptor server = + ASSERT_NO_ERRNO_AND_VALUE(Accept(listen_fd.get(), nullptr, nullptr)); + servers.push_back(std::move(server)); + continue; + } + ASSERT_THAT(ret, SyscallFailsWithErrno(EADDRNOTAVAIL)); + break; + } +} + +INSTANTIATE_TEST_SUITE_P( + All, SocketInetLoopbackTest, + ::testing::Values( + // Listeners bound to IPv4 addresses refuse connections using IPv6 + // addresses. + TestParam{V4Any(), V4Any()}, TestParam{V4Any(), V4Loopback()}, + TestParam{V4Any(), V4MappedAny()}, + TestParam{V4Any(), V4MappedLoopback()}, + TestParam{V4Loopback(), V4Any()}, TestParam{V4Loopback(), V4Loopback()}, + TestParam{V4Loopback(), V4MappedLoopback()}, + TestParam{V4MappedAny(), V4Any()}, + TestParam{V4MappedAny(), V4Loopback()}, + TestParam{V4MappedAny(), V4MappedAny()}, + TestParam{V4MappedAny(), V4MappedLoopback()}, + TestParam{V4MappedLoopback(), V4Any()}, + TestParam{V4MappedLoopback(), V4Loopback()}, + TestParam{V4MappedLoopback(), V4MappedLoopback()}, + + // Listeners bound to IN6ADDR_ANY accept all connections. + TestParam{V6Any(), V4Any()}, TestParam{V6Any(), V4Loopback()}, + TestParam{V6Any(), V4MappedAny()}, + TestParam{V6Any(), V4MappedLoopback()}, TestParam{V6Any(), V6Any()}, + TestParam{V6Any(), V6Loopback()}, + + // Listeners bound to IN6ADDR_LOOPBACK refuse connections using IPv4 + // addresses. + TestParam{V6Loopback(), V6Any()}, + TestParam{V6Loopback(), V6Loopback()}), + DescribeTestParam); + +} // namespace + +} // namespace testing +} // namespace gvisor diff --git a/test/syscalls/linux/socket_ip_tcp_generic.cc b/test/syscalls/linux/socket_ip_tcp_generic.cc index fa81845fd..15adc8d0e 100644 --- a/test/syscalls/linux/socket_ip_tcp_generic.cc +++ b/test/syscalls/linux/socket_ip_tcp_generic.cc @@ -524,6 +524,7 @@ TEST_P(TCPSocketPairTest, SetTCPKeepintvlZero) { // Copied from include/net/tcp.h. constexpr int MAX_TCP_KEEPIDLE = 32767; constexpr int MAX_TCP_KEEPINTVL = 32767; +constexpr int MAX_TCP_KEEPCNT = 127; TEST_P(TCPSocketPairTest, SetTCPKeepidleAboveMax) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); @@ -575,6 +576,78 @@ TEST_P(TCPSocketPairTest, SetTCPKeepintvlToMax) { EXPECT_EQ(get, MAX_TCP_KEEPINTVL); } +TEST_P(TCPSocketPairTest, TCPKeepcountDefault) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + int get = -1; + socklen_t get_len = sizeof(get); + EXPECT_THAT( + getsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, &get, &get_len), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(get_len, sizeof(get)); + EXPECT_EQ(get, 9); // 9 keepalive probes. +} + +TEST_P(TCPSocketPairTest, SetTCPKeepcountZero) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + constexpr int kZero = 0; + EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, &kZero, + sizeof(kZero)), + SyscallFailsWithErrno(EINVAL)); +} + +TEST_P(TCPSocketPairTest, SetTCPKeepcountAboveMax) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + constexpr int kAboveMax = MAX_TCP_KEEPCNT + 1; + EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, + &kAboveMax, sizeof(kAboveMax)), + SyscallFailsWithErrno(EINVAL)); +} + +TEST_P(TCPSocketPairTest, SetTCPKeepcountToMax) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, + &MAX_TCP_KEEPCNT, sizeof(MAX_TCP_KEEPCNT)), + SyscallSucceedsWithValue(0)); + + int get = -1; + socklen_t get_len = sizeof(get); + EXPECT_THAT( + getsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, &get, &get_len), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(get_len, sizeof(get)); + EXPECT_EQ(get, MAX_TCP_KEEPCNT); +} + +TEST_P(TCPSocketPairTest, SetTCPKeepcountToOne) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + int keepaliveCount = 1; + EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, + &keepaliveCount, sizeof(keepaliveCount)), + SyscallSucceedsWithValue(0)); + + int get = -1; + socklen_t get_len = sizeof(get); + EXPECT_THAT( + getsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, &get, &get_len), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(get_len, sizeof(get)); + EXPECT_EQ(get, keepaliveCount); +} + +TEST_P(TCPSocketPairTest, SetTCPKeepcountToNegative) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + int keepaliveCount = -5; + EXPECT_THAT(setsockopt(sockets->first_fd(), IPPROTO_TCP, TCP_KEEPCNT, + &keepaliveCount, sizeof(keepaliveCount)), + SyscallFailsWithErrno(EINVAL)); +} + TEST_P(TCPSocketPairTest, SetOOBInline) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); diff --git a/test/syscalls/linux/socket_ip_udp_generic.cc b/test/syscalls/linux/socket_ip_udp_generic.cc index 1c533fdf2..edb86aded 100644 --- a/test/syscalls/linux/socket_ip_udp_generic.cc +++ b/test/syscalls/linux/socket_ip_udp_generic.cc @@ -225,9 +225,6 @@ TEST_P(UDPSocketPairTest, ReuseAddrDefault) { TEST_P(UDPSocketPairTest, SetReuseAddr) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &kSockOptOn, sizeof(kSockOptOn)), SyscallSucceeds()); @@ -292,9 +289,6 @@ TEST_P(UDPSocketPairTest, SetReusePort) { TEST_P(UDPSocketPairTest, SetReuseAddrReusePort) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - ASSERT_THAT(setsockopt(sockets->first_fd(), SOL_SOCKET, SO_REUSEADDR, &kSockOptOn, sizeof(kSockOptOn)), SyscallSucceeds()); diff --git a/test/syscalls/linux/socket_ip_unbound.cc b/test/syscalls/linux/socket_ip_unbound.cc index ca597e267..5536ab53a 100644 --- a/test/syscalls/linux/socket_ip_unbound.cc +++ b/test/syscalls/linux/socket_ip_unbound.cc @@ -157,7 +157,7 @@ TEST_P(IPUnboundSocketTest, TOSDefault) { int get = -1; socklen_t get_sz = sizeof(get); constexpr int kDefaultTOS = 0; - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, kDefaultTOS); @@ -173,7 +173,7 @@ TEST_P(IPUnboundSocketTest, SetTOS) { int get = -1; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, set); @@ -188,7 +188,7 @@ TEST_P(IPUnboundSocketTest, ZeroTOS) { SyscallSucceedsWithValue(0)); int get = -1; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, set); @@ -210,7 +210,7 @@ TEST_P(IPUnboundSocketTest, InvalidLargeTOS) { } int get = -1; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, kDefaultTOS); @@ -229,7 +229,7 @@ TEST_P(IPUnboundSocketTest, CheckSkipECN) { } int get = -1; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, expect); @@ -249,7 +249,7 @@ TEST_P(IPUnboundSocketTest, ZeroTOSOptionSize) { } int get = -1; socklen_t get_sz = 0; - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, 0); EXPECT_EQ(get, -1); @@ -276,7 +276,7 @@ TEST_P(IPUnboundSocketTest, SmallTOSOptionSize) { } uint get = -1; socklen_t get_sz = i; - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, expect_sz); // Account for partial copies by getsockopt, retrieve the lower @@ -297,7 +297,7 @@ TEST_P(IPUnboundSocketTest, LargeTOSOptionSize) { // We expect the system call handler to only copy atmost sizeof(int) bytes // as asserted by the check below. Hence, we do not expect the copy to // overflow in getsockopt. - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(int)); EXPECT_EQ(get, set); @@ -325,7 +325,7 @@ TEST_P(IPUnboundSocketTest, NegativeTOS) { } int get = -1; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, expect); @@ -338,20 +338,20 @@ TEST_P(IPUnboundSocketTest, InvalidNegativeTOS) { TOSOption t = GetTOSOption(GetParam().domain); int expect; if (GetParam().domain == AF_INET) { - EXPECT_THAT(setsockopt(socket->get(), t.level, t.option, &set, set_sz), + ASSERT_THAT(setsockopt(socket->get(), t.level, t.option, &set, set_sz), SyscallSucceedsWithValue(0)); expect = static_cast<uint8_t>(set); if (GetParam().protocol == IPPROTO_TCP) { expect &= ~INET_ECN_MASK; } } else { - EXPECT_THAT(setsockopt(socket->get(), t.level, t.option, &set, set_sz), + ASSERT_THAT(setsockopt(socket->get(), t.level, t.option, &set, set_sz), SyscallFailsWithErrno(EINVAL)); expect = 0; } int get = 0; socklen_t get_sz = sizeof(get); - EXPECT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), + ASSERT_THAT(getsockopt(socket->get(), t.level, t.option, &get, &get_sz), SyscallSucceedsWithValue(0)); EXPECT_EQ(get_sz, sizeof(get)); EXPECT_EQ(get, expect); @@ -377,8 +377,11 @@ TEST_P(IPUnboundSocketTest, NullTOS) { // // Linux's implementation would need fixing as passing a nullptr as optval // and non-zero optlen may not be valid. - EXPECT_THAT(setsockopt(socket->get(), t.level, t.option, nullptr, set_sz), - SyscallSucceedsWithValue(0)); + // TODO(b/158666797): Combine the gVisor and linux cases for IPv6. + // Some kernel versions return EFAULT, so we handle both. + EXPECT_THAT( + setsockopt(socket->get(), t.level, t.option, nullptr, set_sz), + AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(0))); } } socklen_t get_sz = sizeof(int); @@ -419,6 +422,38 @@ TEST_P(IPUnboundSocketTest, InsufficientBufferTOS) { EXPECT_THAT(sendmsg(socket->get(), &msg, 0), SyscallFailsWithErrno(EINVAL)); } +TEST_P(IPUnboundSocketTest, ReuseAddrDefault) { + auto socket = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); + + // FIXME(b/76031995): gVisor TCP sockets default to SO_REUSEADDR enabled. + SKIP_IF(IsRunningOnGvisor() && + (GetParam().type & SOCK_STREAM) == SOCK_STREAM); + + int get = -1; + socklen_t get_sz = sizeof(get); + ASSERT_THAT( + getsockopt(socket->get(), SOL_SOCKET, SO_REUSEADDR, &get, &get_sz), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(get, kSockOptOff); + EXPECT_EQ(get_sz, sizeof(get)); +} + +TEST_P(IPUnboundSocketTest, SetReuseAddr) { + auto socket = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); + + ASSERT_THAT(setsockopt(socket->get(), SOL_SOCKET, SO_REUSEADDR, &kSockOptOn, + sizeof(kSockOptOn)), + SyscallSucceedsWithValue(0)); + + int get = -1; + socklen_t get_sz = sizeof(get); + ASSERT_THAT( + getsockopt(socket->get(), SOL_SOCKET, SO_REUSEADDR, &get, &get_sz), + SyscallSucceedsWithValue(0)); + EXPECT_EQ(get, kSockOptOn); + EXPECT_EQ(get_sz, sizeof(get)); +} + INSTANTIATE_TEST_SUITE_P( IPUnboundSockets, IPUnboundSocketTest, ::testing::ValuesIn(VecCat<SocketKind>(VecCat<SocketKind>( diff --git a/test/syscalls/linux/socket_ipv4_udp_unbound.cc b/test/syscalls/linux/socket_ipv4_udp_unbound.cc index bc4b07a62..4db9553e1 100644 --- a/test/syscalls/linux/socket_ipv4_udp_unbound.cc +++ b/test/syscalls/linux/socket_ipv4_udp_unbound.cc @@ -1672,10 +1672,10 @@ TEST_P(IPv4UDPUnboundSocketTest, TestBindToBcastThenSend) { } // Check that SO_REUSEADDR always delivers to the most recently bound socket. -TEST_P(IPv4UDPUnboundSocketTest, ReuseAddrDistribution) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - +// +// FIXME(gvisor.dev/issue/873): Endpoint order is not restored correctly. Enable +// random and co-op save (below) once that is fixed. +TEST_P(IPv4UDPUnboundSocketTest, ReuseAddrDistribution_NoRandomSave) { std::vector<std::unique_ptr<FileDescriptor>> sockets; sockets.emplace_back(ASSERT_NO_ERRNO_AND_VALUE(NewSocket())); @@ -1696,6 +1696,9 @@ TEST_P(IPv4UDPUnboundSocketTest, ReuseAddrDistribution) { constexpr int kMessageSize = 200; + // FIXME(gvisor.dev/issue/873): Endpoint order is not restored correctly. + const DisableSave ds; + for (int i = 0; i < 10; i++) { // Add a new receiver. sockets.emplace_back(ASSERT_NO_ERRNO_AND_VALUE(NewSocket())); @@ -1836,9 +1839,6 @@ TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConvertibleToReusePort) { } TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConvertibleToReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - auto socket1 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket2 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket3 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); @@ -1880,9 +1880,6 @@ TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConvertibleToReuseAddr) { } TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConversionReversable1) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - auto socket1 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket2 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket3 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); @@ -1927,9 +1924,6 @@ TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConversionReversable1) { } TEST_P(IPv4UDPUnboundSocketTest, BindReuseAddrReusePortConversionReversable2) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - auto socket1 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket2 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket3 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); @@ -2020,9 +2014,6 @@ TEST_P(IPv4UDPUnboundSocketTest, BindDoubleReuseAddrReusePortThenReusePort) { } TEST_P(IPv4UDPUnboundSocketTest, BindDoubleReuseAddrReusePortThenReuseAddr) { - // FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets. - SKIP_IF(IsRunningOnGvisor()); - auto socket1 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket2 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); auto socket3 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); @@ -2129,6 +2120,39 @@ TEST_P(IPv4UDPUnboundSocketTest, ReuseAddrReusePortDistribution) { SyscallSucceedsWithValue(kMessageSize)); } +// Check that connect returns EADDRNOTAVAIL when out of local ephemeral ports. +// We disable S/R because this test creates a large number of sockets. +TEST_P(IPv4UDPUnboundSocketTest, UDPConnectPortExhaustion_NoRandomSave) { + auto receiver1 = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); + constexpr int kClients = 65536; + // Bind the first socket to the loopback and take note of the selected port. + auto addr = V4Loopback(); + ASSERT_THAT(bind(receiver1->get(), reinterpret_cast<sockaddr*>(&addr.addr), + addr.addr_len), + SyscallSucceeds()); + socklen_t addr_len = addr.addr_len; + ASSERT_THAT(getsockname(receiver1->get(), + reinterpret_cast<sockaddr*>(&addr.addr), &addr_len), + SyscallSucceeds()); + EXPECT_EQ(addr_len, addr.addr_len); + + // Disable cooperative S/R as we are making too many syscalls. + DisableSave ds; + std::vector<std::unique_ptr<FileDescriptor>> sockets; + for (int i = 0; i < kClients; i++) { + auto s = ASSERT_NO_ERRNO_AND_VALUE(NewSocket()); + + int ret = connect(s->get(), reinterpret_cast<sockaddr*>(&addr.addr), + addr.addr_len); + if (ret == 0) { + sockets.push_back(std::move(s)); + continue; + } + ASSERT_THAT(ret, SyscallFailsWithErrno(EAGAIN)); + break; + } +} + // Test that socket will receive packet info control message. TEST_P(IPv4UDPUnboundSocketTest, SetAndReceiveIPPKTINFO) { // TODO(gvisor.dev/issue/1202): ioctl() is not supported by hostinet. diff --git a/test/syscalls/linux/socket_unix.cc b/test/syscalls/linux/socket_unix.cc index 8bf663e8b..591cab3fd 100644 --- a/test/syscalls/linux/socket_unix.cc +++ b/test/syscalls/linux/socket_unix.cc @@ -256,10 +256,9 @@ TEST_P(UnixSocketPairTest, ShutdownWrite) { } TEST_P(UnixSocketPairTest, SocketReopenFromProcfs) { - // TODO(b/122310852): We should be returning ENXIO and NOT EIO. - // TODO(github.dev/issue/1624): This should be resolved in VFS2. Verify - // that this is the case and delete the SKIP_IF once we delete VFS1. - SKIP_IF(IsRunningOnGvisor()); + // TODO(gvisor.dev/issue/1624): In VFS1, we return EIO instead of ENXIO (see + // b/122310852). Remove this skip once VFS1 is deleted. + SKIP_IF(IsRunningWithVFS1()); auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); // Opening a socket pair via /proc/self/fd/X is a ENXIO. diff --git a/test/syscalls/linux/socket_unix_seqpacket.cc b/test/syscalls/linux/socket_unix_seqpacket.cc index 84d3a569e..6d03df4d9 100644 --- a/test/syscalls/linux/socket_unix_seqpacket.cc +++ b/test/syscalls/linux/socket_unix_seqpacket.cc @@ -43,6 +43,24 @@ TEST_P(SeqpacketUnixSocketPairTest, ReadOneSideClosed) { SyscallSucceedsWithValue(0)); } +TEST_P(SeqpacketUnixSocketPairTest, Sendto) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + struct sockaddr_un addr = {}; + addr.sun_family = AF_UNIX; + constexpr char kPath[] = "\0nonexistent"; + memcpy(addr.sun_path, kPath, sizeof(kPath)); + + constexpr char kStr[] = "abc"; + ASSERT_THAT(sendto(sockets->second_fd(), kStr, 3, 0, (struct sockaddr*)&addr, + sizeof(addr)), + SyscallSucceedsWithValue(3)); + + char data[10] = {}; + ASSERT_THAT(read(sockets->first_fd(), data, sizeof(data)), + SyscallSucceedsWithValue(3)); +} + } // namespace } // namespace testing diff --git a/test/syscalls/linux/socket_unix_stream.cc b/test/syscalls/linux/socket_unix_stream.cc index 563467365..99e77b89e 100644 --- a/test/syscalls/linux/socket_unix_stream.cc +++ b/test/syscalls/linux/socket_unix_stream.cc @@ -89,6 +89,20 @@ TEST_P(StreamUnixSocketPairTest, ReadOneSideClosedWithUnreadData) { SyscallFailsWithErrno(ECONNRESET)); } +TEST_P(StreamUnixSocketPairTest, Sendto) { + auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); + + struct sockaddr_un addr = {}; + addr.sun_family = AF_UNIX; + constexpr char kPath[] = "\0nonexistent"; + memcpy(addr.sun_path, kPath, sizeof(kPath)); + + constexpr char kStr[] = "abc"; + ASSERT_THAT(sendto(sockets->second_fd(), kStr, 3, 0, (struct sockaddr*)&addr, + sizeof(addr)), + SyscallFailsWithErrno(EISCONN)); +} + INSTANTIATE_TEST_SUITE_P( AllUnixDomainSockets, StreamUnixSocketPairTest, ::testing::ValuesIn(IncludeReversals(VecCat<SocketPairKind>( diff --git a/test/syscalls/linux/splice.cc b/test/syscalls/linux/splice.cc index f103e2e56..08fc4b1b7 100644 --- a/test/syscalls/linux/splice.cc +++ b/test/syscalls/linux/splice.cc @@ -430,6 +430,55 @@ TEST(SpliceTest, TwoPipes) { EXPECT_EQ(memcmp(rbuf.data(), buf.data(), kPageSize), 0); } +TEST(SpliceTest, TwoPipesCircular) { + // This test deadlocks the sentry on VFS1 because VFS1 splice ordering is + // based on fs.File.UniqueID, which does not prevent circular ordering between + // e.g. inode-level locks taken by fs.FileOperations. + SKIP_IF(IsRunningWithVFS1()); + + // Create two pipes. + int fds[2]; + ASSERT_THAT(pipe(fds), SyscallSucceeds()); + const FileDescriptor first_rfd(fds[0]); + const FileDescriptor first_wfd(fds[1]); + ASSERT_THAT(pipe(fds), SyscallSucceeds()); + const FileDescriptor second_rfd(fds[0]); + const FileDescriptor second_wfd(fds[1]); + + // On Linux, each pipe is normally limited to + // include/linux/pipe_fs_i.h:PIPE_DEF_BUFFERS buffers worth of data. + constexpr size_t PIPE_DEF_BUFFERS = 16; + + // Write some data to each pipe. Below we splice 1 byte at a time between + // pipes, which very quickly causes each byte to be stored in a separate + // buffer, so we must ensure that the total amount of data in the system is <= + // PIPE_DEF_BUFFERS bytes. + std::vector<char> buf(PIPE_DEF_BUFFERS / 2); + RandomizeBuffer(buf.data(), buf.size()); + ASSERT_THAT(write(first_wfd.get(), buf.data(), buf.size()), + SyscallSucceedsWithValue(buf.size())); + ASSERT_THAT(write(second_wfd.get(), buf.data(), buf.size()), + SyscallSucceedsWithValue(buf.size())); + + // Have another thread splice from the second pipe to the first, while we + // splice from the first to the second. The test passes if this does not + // deadlock. + const int kIterations = 1000; + DisableSave ds; + ScopedThread t([&]() { + for (int i = 0; i < kIterations; i++) { + ASSERT_THAT( + splice(second_rfd.get(), nullptr, first_wfd.get(), nullptr, 1, 0), + SyscallSucceedsWithValue(1)); + } + }); + for (int i = 0; i < kIterations; i++) { + ASSERT_THAT( + splice(first_rfd.get(), nullptr, second_wfd.get(), nullptr, 1, 0), + SyscallSucceedsWithValue(1)); + } +} + TEST(SpliceTest, Blocking) { // Create two new pipes. int first[2], second[2]; diff --git a/test/syscalls/linux/tuntap.cc b/test/syscalls/linux/tuntap.cc index 6195b11e1..97d554e72 100644 --- a/test/syscalls/linux/tuntap.cc +++ b/test/syscalls/linux/tuntap.cc @@ -398,5 +398,25 @@ TEST_F(TuntapTest, SendUdpTriggersArpResolution) { } } +// Write hang bug found by syskaller: b/155928773 +// https://syzkaller.appspot.com/bug?id=065b893bd8d1d04a4e0a1d53c578537cde1efe99 +TEST_F(TuntapTest, WriteHangBug155928773) { + SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_NET_ADMIN))); + + FileDescriptor fd = + ASSERT_NO_ERRNO_AND_VALUE(OpenAndAttachTap(kTapName, "10.0.0.1")); + + int sock = socket(AF_INET, SOCK_DGRAM, 0); + ASSERT_THAT(sock, SyscallSucceeds()); + + struct sockaddr_in remote = {}; + remote.sin_family = AF_INET; + remote.sin_port = htons(42); + inet_pton(AF_INET, "10.0.0.1", &remote.sin_addr); + // Return values do not matter in this test. + connect(sock, reinterpret_cast<struct sockaddr*>(&remote), sizeof(remote)); + write(sock, "hello", 5); +} + } // namespace testing } // namespace gvisor diff --git a/test/syscalls/linux/udp_socket_test_cases.cc b/test/syscalls/linux/udp_socket_test_cases.cc index 740c7986d..42521efef 100644 --- a/test/syscalls/linux/udp_socket_test_cases.cc +++ b/test/syscalls/linux/udp_socket_test_cases.cc @@ -17,6 +17,7 @@ #include <arpa/inet.h> #include <fcntl.h> #include <netinet/in.h> +#include <poll.h> #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/types.h> @@ -673,6 +674,11 @@ TEST_P(UdpSocketTest, ZerolengthWriteAllowed) { char buf[3]; // Send zero length packet from s_ to t_. ASSERT_THAT(write(s_, buf, 0), SyscallSucceedsWithValue(0)); + + struct pollfd pfd = {t_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // Receive the packet. char received[3]; EXPECT_THAT(read(t_, received, sizeof(received)), @@ -698,6 +704,11 @@ TEST_P(UdpSocketTest, ZerolengthWriteAllowedNonBlockRead) { char buf[3]; // Send zero length packet from s_ to t_. ASSERT_THAT(write(s_, buf, 0), SyscallSucceedsWithValue(0)); + + struct pollfd pfd = {t_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // Receive the packet. char received[3]; EXPECT_THAT(read(t_, received, sizeof(received)), @@ -859,6 +870,10 @@ TEST_P(UdpSocketTest, ReadShutdownNonblockPendingData) { EXPECT_THAT(shutdown(s_, SHUT_RD), SyscallSucceeds()); + struct pollfd pfd = {s_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // We should get the data even though read has been shutdown. EXPECT_THAT(recv(s_, received, 2, 0), SyscallSucceedsWithValue(2)); @@ -1112,6 +1127,10 @@ TEST_P(UdpSocketTest, FIONREADWriteShutdown) { ASSERT_THAT(send(s_, str, sizeof(str), 0), SyscallSucceedsWithValue(sizeof(str))); + struct pollfd pfd = {s_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + n = -1; EXPECT_THAT(ioctl(s_, FIONREAD, &n), SyscallSucceedsWithValue(0)); EXPECT_EQ(n, sizeof(str)); @@ -1123,6 +1142,8 @@ TEST_P(UdpSocketTest, FIONREADWriteShutdown) { EXPECT_EQ(n, sizeof(str)); } +// NOTE: Do not use `FIONREAD` as test name because it will be replaced by the +// corresponding macro and become `0x541B`. TEST_P(UdpSocketTest, Fionread) { // Bind s_ to loopback:TestPort. ASSERT_THAT(bind(s_, addr_[0], addrlen_), SyscallSucceeds()); @@ -1138,10 +1159,14 @@ TEST_P(UdpSocketTest, Fionread) { char buf[3 * psize]; RandomizeBuffer(buf, sizeof(buf)); + struct pollfd pfd = {s_, POLLIN, 0}; for (int i = 0; i < 3; ++i) { ASSERT_THAT(sendto(t_, buf + i * psize, psize, 0, addr_[0], addrlen_), SyscallSucceedsWithValue(psize)); + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // Check that regardless of how many packets are in the queue, the size // reported is that of a single packet. n = -1; @@ -1165,10 +1190,18 @@ TEST_P(UdpSocketTest, FIONREADZeroLengthPacket) { char buf[3 * psize]; RandomizeBuffer(buf, sizeof(buf)); + struct pollfd pfd = {s_, POLLIN, 0}; for (int i = 0; i < 3; ++i) { ASSERT_THAT(sendto(t_, buf + i * psize, 0, 0, addr_[0], addrlen_), SyscallSucceedsWithValue(0)); + // TODO(gvisor.dev/issue/2726): sending a zero-length message to a hostinet + // socket does not cause a poll event to be triggered. + if (!IsRunningWithHostinet()) { + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + } + // Check that regardless of how many packets are in the queue, the size // reported is that of a single packet. n = -1; @@ -1235,6 +1268,10 @@ TEST_P(UdpSocketTest, SoTimestamp) { // Send zero length packet from t_ to s_. ASSERT_THAT(RetryEINTR(write)(t_, buf, 0), SyscallSucceedsWithValue(0)); + struct pollfd pfd = {s_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + char cmsgbuf[CMSG_SPACE(sizeof(struct timeval))]; msghdr msg; memset(&msg, 0, sizeof(msg)); @@ -1278,6 +1315,10 @@ TEST_P(UdpSocketTest, TimestampIoctl) { ASSERT_THAT(RetryEINTR(write)(t_, buf, sizeof(buf)), SyscallSucceedsWithValue(sizeof(buf))); + struct pollfd pfd = {s_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // There should be no control messages. char recv_buf[sizeof(buf)]; ASSERT_NO_FATAL_FAILURE(RecvNoCmsg(s_, recv_buf, sizeof(recv_buf))); @@ -1315,6 +1356,10 @@ TEST_P(UdpSocketTest, TimestampIoctlPersistence) { SyscallSucceedsWithValue(sizeof(buf))); ASSERT_THAT(RetryEINTR(write)(t_, buf, 0), SyscallSucceedsWithValue(0)); + struct pollfd pfd = {s_, POLLIN, 0}; + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // There should be no control messages. char recv_buf[sizeof(buf)]; ASSERT_NO_FATAL_FAILURE(RecvNoCmsg(s_, recv_buf, sizeof(recv_buf))); @@ -1330,6 +1375,9 @@ TEST_P(UdpSocketTest, TimestampIoctlPersistence) { SyscallSucceeds()); ASSERT_THAT(RetryEINTR(write)(t_, buf, 0), SyscallSucceedsWithValue(0)); + ASSERT_THAT(RetryEINTR(poll)(&pfd, 1, /*timeout=*/1000), + SyscallSucceedsWithValue(1)); + // There should be a message for SO_TIMESTAMP. char cmsgbuf[CMSG_SPACE(sizeof(struct timeval))]; msghdr msg = {}; |