mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Jamie Liu
4748786350
This is consistent with Linux's fs/fuse/dev.c:fuse_do_dev_write(). PiperOrigin-RevId: 660096450
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
// Copyright 2023 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <fcntl.h>
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#include <linux/capability.h>
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#include <linux/fuse.h>
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#include <stdio.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <cerrno>
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#include <cstdint>
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#include <cstdlib>
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#include <string>
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#include <vector>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "absl/strings/str_format.h"
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#include "absl/strings/string_view.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/fs_util.h"
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#include "test/util/linux_capability_util.h"
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#include "test/util/mount_util.h"
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#include "test/util/posix_error.h"
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#include "test/util/temp_path.h"
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#include "test/util/test_util.h"
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using ::testing::Ge;
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namespace gvisor {
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namespace testing {
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namespace {
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TEST(FuseTest, RejectBadInit) {
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SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN)));
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const FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/fuse", O_RDWR, 0));
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auto mount_point = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
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auto mount_opts =
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absl::StrFormat("fd=%d,user_id=0,group_id=0,rootmode=40000", fd.get());
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auto mount = ASSERT_NO_ERRNO_AND_VALUE(
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Mount("fuse", mount_point.path(), "fuse", MS_NODEV | MS_NOSUID,
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mount_opts, 0 /* umountflags */));
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// Read the init request so that we have the correct unique ID.
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alignas(fuse_in_header) char req_buf[FUSE_MIN_READ_BUFFER];
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ASSERT_THAT(read(fd.get(), req_buf, sizeof(req_buf)),
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SyscallSucceedsWithValue(Ge(sizeof(fuse_in_header))));
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fuse_out_header resp;
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resp.len = sizeof(resp) - 1;
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resp.error = 0;
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resp.unique = reinterpret_cast<fuse_in_header*>(req_buf)->unique;
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ASSERT_THAT(write(fd.get(), reinterpret_cast<char*>(&resp), sizeof(resp)),
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SyscallFailsWithErrno(EINVAL));
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}
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TEST(FuseTest, LookupUpdatesInode) {
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SKIP_IF(absl::NullSafeStringView(getenv("GVISOR_FUSE_TEST")) != "TRUE");
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const std::string kFileData = "May thy knife chip and shatter.\n";
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TempPath path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
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GetAbsoluteTestTmpdir(), kFileData, TempPath::kDefaultFileMode));
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FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(path.path(), O_RDONLY));
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std::vector<char> buf(kFileData.size());
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ASSERT_THAT(ReadFd(fd.get(), buf.data(), kFileData.size()),
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SyscallSucceedsWithValue(kFileData.size()));
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ASSERT_THAT(unlink(JoinPath("/fuse", Basename(path.path())).c_str()),
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SyscallSucceeds());
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EXPECT_THAT(access(path.path().c_str(), O_RDONLY),
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SyscallFailsWithErrno(ENOENT));
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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